1 /*
2  * relaxng.c : implementation of the Relax-NG handling and validity checking
3  *
4  * See Copyright for the status of this software.
5  *
6  * Daniel Veillard <veillard@redhat.com>
7  */
8 
9 /**
10  * TODO:
11  * - add support for DTD compatibility spec
12  *   http://www.oasis-open.org/committees/relax-ng/compatibility-20011203.html
13  * - report better mem allocations pbms at runtime and abort immediately.
14  */
15 
16 #define IN_LIBXML
17 #include "libxml.h"
18 
19 #ifdef LIBXML_SCHEMAS_ENABLED
20 
21 #include <string.h>
22 #include <stdio.h>
23 #include <libxml/xmlmemory.h>
24 #include <libxml/parser.h>
25 #include <libxml/parserInternals.h>
26 #include <libxml/hash.h>
27 #include <libxml/uri.h>
28 
29 #include <libxml/relaxng.h>
30 
31 #include <libxml/xmlschemastypes.h>
32 #include <libxml/xmlautomata.h>
33 #include <libxml/xmlregexp.h>
34 #include <libxml/xmlschemastypes.h>
35 
36 /*
37  * The Relax-NG namespace
38  */
39 static const xmlChar *xmlRelaxNGNs = (const xmlChar *)
40     "http://relaxng.org/ns/structure/1.0";
41 
42 #define IS_RELAXNG(node, typ)						\
43    ((node != NULL) && (node->ns != NULL) &&				\
44     (node->type == XML_ELEMENT_NODE) &&					\
45     (xmlStrEqual(node->name, (const xmlChar *) typ)) &&		\
46     (xmlStrEqual(node->ns->href, xmlRelaxNGNs)))
47 
48 
49 #if 0
50 #define DEBUG 1
51 
52 #define DEBUG_GRAMMAR 1
53 
54 #define DEBUG_CONTENT 1
55 
56 #define DEBUG_TYPE 1
57 
58 #define DEBUG_VALID 1
59 
60 #define DEBUG_INTERLEAVE 1
61 
62 #define DEBUG_LIST 1
63 
64 #define DEBUG_INCLUDE 1
65 
66 #define DEBUG_ERROR 1
67 
68 #define DEBUG_COMPILE 1
69 
70 #define DEBUG_PROGRESSIVE 1
71 #endif
72 
73 #define MAX_ERROR 5
74 
75 #define TODO								\
76     xmlGenericError(xmlGenericErrorContext,				\
77 	    "Unimplemented block at %s:%d\n",				\
78             __FILE__, __LINE__);
79 
80 typedef struct _xmlRelaxNGSchema xmlRelaxNGSchema;
81 typedef xmlRelaxNGSchema *xmlRelaxNGSchemaPtr;
82 
83 typedef struct _xmlRelaxNGDefine xmlRelaxNGDefine;
84 typedef xmlRelaxNGDefine *xmlRelaxNGDefinePtr;
85 
86 typedef struct _xmlRelaxNGDocument xmlRelaxNGDocument;
87 typedef xmlRelaxNGDocument *xmlRelaxNGDocumentPtr;
88 
89 typedef struct _xmlRelaxNGInclude xmlRelaxNGInclude;
90 typedef xmlRelaxNGInclude *xmlRelaxNGIncludePtr;
91 
92 typedef enum {
93     XML_RELAXNG_COMBINE_UNDEFINED = 0,  /* undefined */
94     XML_RELAXNG_COMBINE_CHOICE, /* choice */
95     XML_RELAXNG_COMBINE_INTERLEAVE      /* interleave */
96 } xmlRelaxNGCombine;
97 
98 typedef enum {
99     XML_RELAXNG_CONTENT_ERROR = -1,
100     XML_RELAXNG_CONTENT_EMPTY = 0,
101     XML_RELAXNG_CONTENT_SIMPLE,
102     XML_RELAXNG_CONTENT_COMPLEX
103 } xmlRelaxNGContentType;
104 
105 typedef struct _xmlRelaxNGGrammar xmlRelaxNGGrammar;
106 typedef xmlRelaxNGGrammar *xmlRelaxNGGrammarPtr;
107 
108 struct _xmlRelaxNGGrammar {
109     xmlRelaxNGGrammarPtr parent;        /* the parent grammar if any */
110     xmlRelaxNGGrammarPtr children;      /* the children grammar if any */
111     xmlRelaxNGGrammarPtr next;  /* the next grammar if any */
112     xmlRelaxNGDefinePtr start;  /* <start> content */
113     xmlRelaxNGCombine combine;  /* the default combine value */
114     xmlRelaxNGDefinePtr startList;      /* list of <start> definitions */
115     xmlHashTablePtr defs;       /* define* */
116     xmlHashTablePtr refs;       /* references */
117 };
118 
119 
120 typedef enum {
121     XML_RELAXNG_NOOP = -1,      /* a no operation from simplification  */
122     XML_RELAXNG_EMPTY = 0,      /* an empty pattern */
123     XML_RELAXNG_NOT_ALLOWED,    /* not allowed top */
124     XML_RELAXNG_EXCEPT,         /* except present in nameclass defs */
125     XML_RELAXNG_TEXT,           /* textual content */
126     XML_RELAXNG_ELEMENT,        /* an element */
127     XML_RELAXNG_DATATYPE,       /* extenal data type definition */
128     XML_RELAXNG_PARAM,          /* extenal data type parameter */
129     XML_RELAXNG_VALUE,          /* value from an extenal data type definition */
130     XML_RELAXNG_LIST,           /* a list of patterns */
131     XML_RELAXNG_ATTRIBUTE,      /* an attrbute following a pattern */
132     XML_RELAXNG_DEF,            /* a definition */
133     XML_RELAXNG_REF,            /* reference to a definition */
134     XML_RELAXNG_EXTERNALREF,    /* reference to an external def */
135     XML_RELAXNG_PARENTREF,      /* reference to a def in the parent grammar */
136     XML_RELAXNG_OPTIONAL,       /* optional patterns */
137     XML_RELAXNG_ZEROORMORE,     /* zero or more non empty patterns */
138     XML_RELAXNG_ONEORMORE,      /* one or more non empty patterns */
139     XML_RELAXNG_CHOICE,         /* a choice between non empty patterns */
140     XML_RELAXNG_GROUP,          /* a pair/group of non empty patterns */
141     XML_RELAXNG_INTERLEAVE,     /* interleaving choice of non-empty patterns */
142     XML_RELAXNG_START           /* Used to keep track of starts on grammars */
143 } xmlRelaxNGType;
144 
145 #define IS_NULLABLE		(1 << 0)
146 #define IS_NOT_NULLABLE		(1 << 1)
147 #define IS_INDETERMINIST	(1 << 2)
148 #define IS_MIXED		(1 << 3)
149 #define IS_TRIABLE		(1 << 4)
150 #define IS_PROCESSED		(1 << 5)
151 #define IS_COMPILABLE		(1 << 6)
152 #define IS_NOT_COMPILABLE	(1 << 7)
153 #define IS_EXTERNAL_REF	        (1 << 8)
154 
155 struct _xmlRelaxNGDefine {
156     xmlRelaxNGType type;        /* the type of definition */
157     xmlNodePtr node;            /* the node in the source */
158     xmlChar *name;              /* the element local name if present */
159     xmlChar *ns;                /* the namespace local name if present */
160     xmlChar *value;             /* value when available */
161     void *data;                 /* data lib or specific pointer */
162     xmlRelaxNGDefinePtr content;        /* the expected content */
163     xmlRelaxNGDefinePtr parent; /* the parent definition, if any */
164     xmlRelaxNGDefinePtr next;   /* list within grouping sequences */
165     xmlRelaxNGDefinePtr attrs;  /* list of attributes for elements */
166     xmlRelaxNGDefinePtr nameClass;      /* the nameClass definition if any */
167     xmlRelaxNGDefinePtr nextHash;       /* next define in defs/refs hash tables */
168     short depth;                /* used for the cycle detection */
169     short dflags;               /* define related flags */
170     xmlRegexpPtr contModel;     /* a compiled content model if available */
171 };
172 
173 /**
174  * _xmlRelaxNG:
175  *
176  * A RelaxNGs definition
177  */
178 struct _xmlRelaxNG {
179     void *_private;             /* unused by the library for users or bindings */
180     xmlRelaxNGGrammarPtr topgrammar;
181     xmlDocPtr doc;
182 
183     int idref;                  /* requires idref checking */
184 
185     xmlHashTablePtr defs;       /* define */
186     xmlHashTablePtr refs;       /* references */
187     xmlRelaxNGDocumentPtr documents;    /* all the documents loaded */
188     xmlRelaxNGIncludePtr includes;      /* all the includes loaded */
189     int defNr;                  /* number of defines used */
190     xmlRelaxNGDefinePtr *defTab;        /* pointer to the allocated definitions */
191 
192 };
193 
194 #define XML_RELAXNG_IN_ATTRIBUTE	(1 << 0)
195 #define XML_RELAXNG_IN_ONEORMORE	(1 << 1)
196 #define XML_RELAXNG_IN_LIST		(1 << 2)
197 #define XML_RELAXNG_IN_DATAEXCEPT	(1 << 3)
198 #define XML_RELAXNG_IN_START		(1 << 4)
199 #define XML_RELAXNG_IN_OOMGROUP		(1 << 5)
200 #define XML_RELAXNG_IN_OOMINTERLEAVE	(1 << 6)
201 #define XML_RELAXNG_IN_EXTERNALREF	(1 << 7)
202 #define XML_RELAXNG_IN_ANYEXCEPT	(1 << 8)
203 #define XML_RELAXNG_IN_NSEXCEPT		(1 << 9)
204 
205 struct _xmlRelaxNGParserCtxt {
206     void *userData;             /* user specific data block */
207     xmlRelaxNGValidityErrorFunc error;  /* the callback in case of errors */
208     xmlRelaxNGValidityWarningFunc warning;      /* the callback in case of warning */
209     xmlStructuredErrorFunc serror;
210     xmlRelaxNGValidErr err;
211 
212     xmlRelaxNGPtr schema;       /* The schema in use */
213     xmlRelaxNGGrammarPtr grammar;       /* the current grammar */
214     xmlRelaxNGGrammarPtr parentgrammar; /* the parent grammar */
215     int flags;                  /* parser flags */
216     int nbErrors;               /* number of errors at parse time */
217     int nbWarnings;             /* number of warnings at parse time */
218     const xmlChar *define;      /* the current define scope */
219     xmlRelaxNGDefinePtr def;    /* the current define */
220 
221     int nbInterleaves;
222     xmlHashTablePtr interleaves;        /* keep track of all the interleaves */
223 
224     xmlRelaxNGDocumentPtr documents;    /* all the documents loaded */
225     xmlRelaxNGIncludePtr includes;      /* all the includes loaded */
226     xmlChar *URL;
227     xmlDocPtr document;
228 
229     int defNr;                  /* number of defines used */
230     int defMax;                 /* number of defines aloocated */
231     xmlRelaxNGDefinePtr *defTab;        /* pointer to the allocated definitions */
232 
233     const char *buffer;
234     int size;
235 
236     /* the document stack */
237     xmlRelaxNGDocumentPtr doc;  /* Current parsed external ref */
238     int docNr;                  /* Depth of the parsing stack */
239     int docMax;                 /* Max depth of the parsing stack */
240     xmlRelaxNGDocumentPtr *docTab;      /* array of docs */
241 
242     /* the include stack */
243     xmlRelaxNGIncludePtr inc;   /* Current parsed include */
244     int incNr;                  /* Depth of the include parsing stack */
245     int incMax;                 /* Max depth of the parsing stack */
246     xmlRelaxNGIncludePtr *incTab;       /* array of incs */
247 
248     int idref;                  /* requires idref checking */
249 
250     /* used to compile content models */
251     xmlAutomataPtr am;          /* the automata */
252     xmlAutomataStatePtr state;  /* used to build the automata */
253 
254     int crng;			/* compact syntax and other flags */
255     int freedoc;		/* need to free the document */
256 };
257 
258 #define FLAGS_IGNORABLE		1
259 #define FLAGS_NEGATIVE		2
260 #define FLAGS_MIXED_CONTENT	4
261 #define FLAGS_NOERROR		8
262 
263 /**
264  * xmlRelaxNGInterleaveGroup:
265  *
266  * A RelaxNGs partition set associated to lists of definitions
267  */
268 typedef struct _xmlRelaxNGInterleaveGroup xmlRelaxNGInterleaveGroup;
269 typedef xmlRelaxNGInterleaveGroup *xmlRelaxNGInterleaveGroupPtr;
270 struct _xmlRelaxNGInterleaveGroup {
271     xmlRelaxNGDefinePtr rule;   /* the rule to satisfy */
272     xmlRelaxNGDefinePtr *defs;  /* the array of element definitions */
273     xmlRelaxNGDefinePtr *attrs; /* the array of attributes definitions */
274 };
275 
276 #define IS_DETERMINIST		1
277 #define IS_NEEDCHECK		2
278 
279 /**
280  * xmlRelaxNGPartitions:
281  *
282  * A RelaxNGs partition associated to an interleave group
283  */
284 typedef struct _xmlRelaxNGPartition xmlRelaxNGPartition;
285 typedef xmlRelaxNGPartition *xmlRelaxNGPartitionPtr;
286 struct _xmlRelaxNGPartition {
287     int nbgroups;               /* number of groups in the partitions */
288     xmlHashTablePtr triage;     /* hash table used to direct nodes to the
289                                  * right group when possible */
290     int flags;                  /* determinist ? */
291     xmlRelaxNGInterleaveGroupPtr *groups;
292 };
293 
294 /**
295  * xmlRelaxNGValidState:
296  *
297  * A RelaxNGs validation state
298  */
299 #define MAX_ATTR 20
300 typedef struct _xmlRelaxNGValidState xmlRelaxNGValidState;
301 typedef xmlRelaxNGValidState *xmlRelaxNGValidStatePtr;
302 struct _xmlRelaxNGValidState {
303     xmlNodePtr node;            /* the current node */
304     xmlNodePtr seq;             /* the sequence of children left to validate */
305     int nbAttrs;                /* the number of attributes */
306     int maxAttrs;               /* the size of attrs */
307     int nbAttrLeft;             /* the number of attributes left to validate */
308     xmlChar *value;             /* the value when operating on string */
309     xmlChar *endvalue;          /* the end value when operating on string */
310     xmlAttrPtr *attrs;          /* the array of attributes */
311 };
312 
313 /**
314  * xmlRelaxNGStates:
315  *
316  * A RelaxNGs container for validation state
317  */
318 typedef struct _xmlRelaxNGStates xmlRelaxNGStates;
319 typedef xmlRelaxNGStates *xmlRelaxNGStatesPtr;
320 struct _xmlRelaxNGStates {
321     int nbState;                /* the number of states */
322     int maxState;               /* the size of the array */
323     xmlRelaxNGValidStatePtr *tabState;
324 };
325 
326 #define ERROR_IS_DUP	1
327 
328 /**
329  * xmlRelaxNGValidError:
330  *
331  * A RelaxNGs validation error
332  */
333 typedef struct _xmlRelaxNGValidError xmlRelaxNGValidError;
334 typedef xmlRelaxNGValidError *xmlRelaxNGValidErrorPtr;
335 struct _xmlRelaxNGValidError {
336     xmlRelaxNGValidErr err;     /* the error number */
337     int flags;                  /* flags */
338     xmlNodePtr node;            /* the current node */
339     xmlNodePtr seq;             /* the current child */
340     const xmlChar *arg1;        /* first arg */
341     const xmlChar *arg2;        /* second arg */
342 };
343 
344 /**
345  * xmlRelaxNGValidCtxt:
346  *
347  * A RelaxNGs validation context
348  */
349 
350 struct _xmlRelaxNGValidCtxt {
351     void *userData;             /* user specific data block */
352     xmlRelaxNGValidityErrorFunc error;  /* the callback in case of errors */
353     xmlRelaxNGValidityWarningFunc warning;      /* the callback in case of warning */
354     xmlStructuredErrorFunc serror;
355     int nbErrors;               /* number of errors in validation */
356 
357     xmlRelaxNGPtr schema;       /* The schema in use */
358     xmlDocPtr doc;              /* the document being validated */
359     int flags;                  /* validation flags */
360     int depth;                  /* validation depth */
361     int idref;                  /* requires idref checking */
362     int errNo;                  /* the first error found */
363 
364     /*
365      * Errors accumulated in branches may have to be stacked to be
366      * provided back when it's sure they affect validation.
367      */
368     xmlRelaxNGValidErrorPtr err;        /* Last error */
369     int errNr;                  /* Depth of the error stack */
370     int errMax;                 /* Max depth of the error stack */
371     xmlRelaxNGValidErrorPtr errTab;     /* stack of errors */
372 
373     xmlRelaxNGValidStatePtr state;      /* the current validation state */
374     xmlRelaxNGStatesPtr states; /* the accumulated state list */
375 
376     xmlRelaxNGStatesPtr freeState;      /* the pool of free valid states */
377     int freeStatesNr;
378     int freeStatesMax;
379     xmlRelaxNGStatesPtr *freeStates;    /* the pool of free state groups */
380 
381     /*
382      * This is used for "progressive" validation
383      */
384     xmlRegExecCtxtPtr elem;     /* the current element regexp */
385     int elemNr;                 /* the number of element validated */
386     int elemMax;                /* the max depth of elements */
387     xmlRegExecCtxtPtr *elemTab; /* the stack of regexp runtime */
388     int pstate;                 /* progressive state */
389     xmlNodePtr pnode;           /* the current node */
390     xmlRelaxNGDefinePtr pdef;   /* the non-streamable definition */
391     int perr;                   /* signal error in content model
392                                  * outside the regexp */
393 };
394 
395 /**
396  * xmlRelaxNGInclude:
397  *
398  * Structure associated to a RelaxNGs document element
399  */
400 struct _xmlRelaxNGInclude {
401     xmlRelaxNGIncludePtr next;  /* keep a chain of includes */
402     xmlChar *href;              /* the normalized href value */
403     xmlDocPtr doc;              /* the associated XML document */
404     xmlRelaxNGDefinePtr content;        /* the definitions */
405     xmlRelaxNGPtr schema;       /* the schema */
406 };
407 
408 /**
409  * xmlRelaxNGDocument:
410  *
411  * Structure associated to a RelaxNGs document element
412  */
413 struct _xmlRelaxNGDocument {
414     xmlRelaxNGDocumentPtr next; /* keep a chain of documents */
415     xmlChar *href;              /* the normalized href value */
416     xmlDocPtr doc;              /* the associated XML document */
417     xmlRelaxNGDefinePtr content;        /* the definitions */
418     xmlRelaxNGPtr schema;       /* the schema */
419     int externalRef;            /* 1 if an external ref */
420 };
421 
422 
423 /************************************************************************
424  *									*
425  *		Some factorized error routines				*
426  *									*
427  ************************************************************************/
428 
429 /**
430  * xmlRngPErrMemory:
431  * @ctxt:  an Relax-NG parser context
432  * @extra:  extra informations
433  *
434  * Handle a redefinition of attribute error
435  */
436 static void
xmlRngPErrMemory(xmlRelaxNGParserCtxtPtr ctxt,const char * extra)437 xmlRngPErrMemory(xmlRelaxNGParserCtxtPtr ctxt, const char *extra)
438 {
439     xmlStructuredErrorFunc schannel = NULL;
440     xmlGenericErrorFunc channel = NULL;
441     void *data = NULL;
442 
443     if (ctxt != NULL) {
444         if (ctxt->serror != NULL)
445 	    schannel = ctxt->serror;
446 	else
447 	    channel = ctxt->error;
448         data = ctxt->userData;
449         ctxt->nbErrors++;
450     }
451     if (extra)
452         __xmlRaiseError(schannel, channel, data,
453                         NULL, NULL, XML_FROM_RELAXNGP,
454                         XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
455                         NULL, NULL, 0, 0,
456                         "Memory allocation failed : %s\n", extra);
457     else
458         __xmlRaiseError(schannel, channel, data,
459                         NULL, NULL, XML_FROM_RELAXNGP,
460                         XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
461                         NULL, NULL, 0, 0, "Memory allocation failed\n");
462 }
463 
464 /**
465  * xmlRngVErrMemory:
466  * @ctxt:  a Relax-NG validation context
467  * @extra:  extra informations
468  *
469  * Handle a redefinition of attribute error
470  */
471 static void
xmlRngVErrMemory(xmlRelaxNGValidCtxtPtr ctxt,const char * extra)472 xmlRngVErrMemory(xmlRelaxNGValidCtxtPtr ctxt, const char *extra)
473 {
474     xmlStructuredErrorFunc schannel = NULL;
475     xmlGenericErrorFunc channel = NULL;
476     void *data = NULL;
477 
478     if (ctxt != NULL) {
479         if (ctxt->serror != NULL)
480 	    schannel = ctxt->serror;
481 	else
482 	    channel = ctxt->error;
483         data = ctxt->userData;
484         ctxt->nbErrors++;
485     }
486     if (extra)
487         __xmlRaiseError(schannel, channel, data,
488                         NULL, NULL, XML_FROM_RELAXNGV,
489                         XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
490                         NULL, NULL, 0, 0,
491                         "Memory allocation failed : %s\n", extra);
492     else
493         __xmlRaiseError(schannel, channel, data,
494                         NULL, NULL, XML_FROM_RELAXNGV,
495                         XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
496                         NULL, NULL, 0, 0, "Memory allocation failed\n");
497 }
498 
499 /**
500  * xmlRngPErr:
501  * @ctxt:  a Relax-NG parser context
502  * @node:  the node raising the error
503  * @error:  the error code
504  * @msg:  message
505  * @str1:  extra info
506  * @str2:  extra info
507  *
508  * Handle a Relax NG Parsing error
509  */
510 static void
xmlRngPErr(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node,int error,const char * msg,const xmlChar * str1,const xmlChar * str2)511 xmlRngPErr(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node, int error,
512            const char *msg, const xmlChar * str1, const xmlChar * str2)
513 {
514     xmlStructuredErrorFunc schannel = NULL;
515     xmlGenericErrorFunc channel = NULL;
516     void *data = NULL;
517 
518     if (ctxt != NULL) {
519         if (ctxt->serror != NULL)
520 	    schannel = ctxt->serror;
521 	else
522 	    channel = ctxt->error;
523         data = ctxt->userData;
524         ctxt->nbErrors++;
525     }
526     __xmlRaiseError(schannel, channel, data,
527                     NULL, node, XML_FROM_RELAXNGP,
528                     error, XML_ERR_ERROR, NULL, 0,
529                     (const char *) str1, (const char *) str2, NULL, 0, 0,
530                     msg, str1, str2);
531 }
532 
533 /**
534  * xmlRngVErr:
535  * @ctxt:  a Relax-NG validation context
536  * @node:  the node raising the error
537  * @error:  the error code
538  * @msg:  message
539  * @str1:  extra info
540  * @str2:  extra info
541  *
542  * Handle a Relax NG Validation error
543  */
544 static void
xmlRngVErr(xmlRelaxNGValidCtxtPtr ctxt,xmlNodePtr node,int error,const char * msg,const xmlChar * str1,const xmlChar * str2)545 xmlRngVErr(xmlRelaxNGValidCtxtPtr ctxt, xmlNodePtr node, int error,
546            const char *msg, const xmlChar * str1, const xmlChar * str2)
547 {
548     xmlStructuredErrorFunc schannel = NULL;
549     xmlGenericErrorFunc channel = NULL;
550     void *data = NULL;
551 
552     if (ctxt != NULL) {
553         if (ctxt->serror != NULL)
554 	    schannel = ctxt->serror;
555 	else
556 	    channel = ctxt->error;
557         data = ctxt->userData;
558         ctxt->nbErrors++;
559     }
560     __xmlRaiseError(schannel, channel, data,
561                     NULL, node, XML_FROM_RELAXNGV,
562                     error, XML_ERR_ERROR, NULL, 0,
563                     (const char *) str1, (const char *) str2, NULL, 0, 0,
564                     msg, str1, str2);
565 }
566 
567 /************************************************************************
568  *									*
569  *		Preliminary type checking interfaces			*
570  *									*
571  ************************************************************************/
572 
573 /**
574  * xmlRelaxNGTypeHave:
575  * @data:  data needed for the library
576  * @type:  the type name
577  * @value:  the value to check
578  *
579  * Function provided by a type library to check if a type is exported
580  *
581  * Returns 1 if yes, 0 if no and -1 in case of error.
582  */
583 typedef int (*xmlRelaxNGTypeHave) (void *data, const xmlChar * type);
584 
585 /**
586  * xmlRelaxNGTypeCheck:
587  * @data:  data needed for the library
588  * @type:  the type name
589  * @value:  the value to check
590  * @result:  place to store the result if needed
591  *
592  * Function provided by a type library to check if a value match a type
593  *
594  * Returns 1 if yes, 0 if no and -1 in case of error.
595  */
596 typedef int (*xmlRelaxNGTypeCheck) (void *data, const xmlChar * type,
597                                     const xmlChar * value, void **result,
598                                     xmlNodePtr node);
599 
600 /**
601  * xmlRelaxNGFacetCheck:
602  * @data:  data needed for the library
603  * @type:  the type name
604  * @facet:  the facet name
605  * @val:  the facet value
606  * @strval:  the string value
607  * @value:  the value to check
608  *
609  * Function provided by a type library to check a value facet
610  *
611  * Returns 1 if yes, 0 if no and -1 in case of error.
612  */
613 typedef int (*xmlRelaxNGFacetCheck) (void *data, const xmlChar * type,
614                                      const xmlChar * facet,
615                                      const xmlChar * val,
616                                      const xmlChar * strval, void *value);
617 
618 /**
619  * xmlRelaxNGTypeFree:
620  * @data:  data needed for the library
621  * @result:  the value to free
622  *
623  * Function provided by a type library to free a returned result
624  */
625 typedef void (*xmlRelaxNGTypeFree) (void *data, void *result);
626 
627 /**
628  * xmlRelaxNGTypeCompare:
629  * @data:  data needed for the library
630  * @type:  the type name
631  * @value1:  the first value
632  * @value2:  the second value
633  *
634  * Function provided by a type library to compare two values accordingly
635  * to a type.
636  *
637  * Returns 1 if yes, 0 if no and -1 in case of error.
638  */
639 typedef int (*xmlRelaxNGTypeCompare) (void *data, const xmlChar * type,
640                                       const xmlChar * value1,
641                                       xmlNodePtr ctxt1,
642                                       void *comp1,
643                                       const xmlChar * value2,
644                                       xmlNodePtr ctxt2);
645 typedef struct _xmlRelaxNGTypeLibrary xmlRelaxNGTypeLibrary;
646 typedef xmlRelaxNGTypeLibrary *xmlRelaxNGTypeLibraryPtr;
647 struct _xmlRelaxNGTypeLibrary {
648     const xmlChar *namespace;   /* the datatypeLibrary value */
649     void *data;                 /* data needed for the library */
650     xmlRelaxNGTypeHave have;    /* the export function */
651     xmlRelaxNGTypeCheck check;  /* the checking function */
652     xmlRelaxNGTypeCompare comp; /* the compare function */
653     xmlRelaxNGFacetCheck facet; /* the facet check function */
654     xmlRelaxNGTypeFree freef;   /* the freeing function */
655 };
656 
657 /************************************************************************
658  *									*
659  *			Allocation functions				*
660  *									*
661  ************************************************************************/
662 static void xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar);
663 static void xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define);
664 static void xmlRelaxNGNormExtSpace(xmlChar * value);
665 static void xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema);
666 static int xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt
667                                      ATTRIBUTE_UNUSED,
668                                      xmlRelaxNGValidStatePtr state1,
669                                      xmlRelaxNGValidStatePtr state2);
670 static void xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,
671                                      xmlRelaxNGValidStatePtr state);
672 
673 /**
674  * xmlRelaxNGFreeDocument:
675  * @docu:  a document structure
676  *
677  * Deallocate a RelaxNG document structure.
678  */
679 static void
xmlRelaxNGFreeDocument(xmlRelaxNGDocumentPtr docu)680 xmlRelaxNGFreeDocument(xmlRelaxNGDocumentPtr docu)
681 {
682     if (docu == NULL)
683         return;
684 
685     if (docu->href != NULL)
686         xmlFree(docu->href);
687     if (docu->doc != NULL)
688         xmlFreeDoc(docu->doc);
689     if (docu->schema != NULL)
690         xmlRelaxNGFreeInnerSchema(docu->schema);
691     xmlFree(docu);
692 }
693 
694 /**
695  * xmlRelaxNGFreeDocumentList:
696  * @docu:  a list of  document structure
697  *
698  * Deallocate a RelaxNG document structures.
699  */
700 static void
xmlRelaxNGFreeDocumentList(xmlRelaxNGDocumentPtr docu)701 xmlRelaxNGFreeDocumentList(xmlRelaxNGDocumentPtr docu)
702 {
703     xmlRelaxNGDocumentPtr next;
704 
705     while (docu != NULL) {
706         next = docu->next;
707         xmlRelaxNGFreeDocument(docu);
708         docu = next;
709     }
710 }
711 
712 /**
713  * xmlRelaxNGFreeInclude:
714  * @incl:  a include structure
715  *
716  * Deallocate a RelaxNG include structure.
717  */
718 static void
xmlRelaxNGFreeInclude(xmlRelaxNGIncludePtr incl)719 xmlRelaxNGFreeInclude(xmlRelaxNGIncludePtr incl)
720 {
721     if (incl == NULL)
722         return;
723 
724     if (incl->href != NULL)
725         xmlFree(incl->href);
726     if (incl->doc != NULL)
727         xmlFreeDoc(incl->doc);
728     if (incl->schema != NULL)
729         xmlRelaxNGFree(incl->schema);
730     xmlFree(incl);
731 }
732 
733 /**
734  * xmlRelaxNGFreeIncludeList:
735  * @incl:  a include structure list
736  *
737  * Deallocate a RelaxNG include structure.
738  */
739 static void
xmlRelaxNGFreeIncludeList(xmlRelaxNGIncludePtr incl)740 xmlRelaxNGFreeIncludeList(xmlRelaxNGIncludePtr incl)
741 {
742     xmlRelaxNGIncludePtr next;
743 
744     while (incl != NULL) {
745         next = incl->next;
746         xmlRelaxNGFreeInclude(incl);
747         incl = next;
748     }
749 }
750 
751 /**
752  * xmlRelaxNGNewRelaxNG:
753  * @ctxt:  a Relax-NG validation context (optional)
754  *
755  * Allocate a new RelaxNG structure.
756  *
757  * Returns the newly allocated structure or NULL in case or error
758  */
759 static xmlRelaxNGPtr
xmlRelaxNGNewRelaxNG(xmlRelaxNGParserCtxtPtr ctxt)760 xmlRelaxNGNewRelaxNG(xmlRelaxNGParserCtxtPtr ctxt)
761 {
762     xmlRelaxNGPtr ret;
763 
764     ret = (xmlRelaxNGPtr) xmlMalloc(sizeof(xmlRelaxNG));
765     if (ret == NULL) {
766         xmlRngPErrMemory(ctxt, NULL);
767         return (NULL);
768     }
769     memset(ret, 0, sizeof(xmlRelaxNG));
770 
771     return (ret);
772 }
773 
774 /**
775  * xmlRelaxNGFreeInnerSchema:
776  * @schema:  a schema structure
777  *
778  * Deallocate a RelaxNG schema structure.
779  */
780 static void
xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema)781 xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema)
782 {
783     if (schema == NULL)
784         return;
785 
786     if (schema->doc != NULL)
787         xmlFreeDoc(schema->doc);
788     if (schema->defTab != NULL) {
789         int i;
790 
791         for (i = 0; i < schema->defNr; i++)
792             xmlRelaxNGFreeDefine(schema->defTab[i]);
793         xmlFree(schema->defTab);
794     }
795 
796     xmlFree(schema);
797 }
798 
799 /**
800  * xmlRelaxNGFree:
801  * @schema:  a schema structure
802  *
803  * Deallocate a RelaxNG structure.
804  */
805 void
xmlRelaxNGFree(xmlRelaxNGPtr schema)806 xmlRelaxNGFree(xmlRelaxNGPtr schema)
807 {
808     if (schema == NULL)
809         return;
810 
811     if (schema->topgrammar != NULL)
812         xmlRelaxNGFreeGrammar(schema->topgrammar);
813     if (schema->doc != NULL)
814         xmlFreeDoc(schema->doc);
815     if (schema->documents != NULL)
816         xmlRelaxNGFreeDocumentList(schema->documents);
817     if (schema->includes != NULL)
818         xmlRelaxNGFreeIncludeList(schema->includes);
819     if (schema->defTab != NULL) {
820         int i;
821 
822         for (i = 0; i < schema->defNr; i++)
823             xmlRelaxNGFreeDefine(schema->defTab[i]);
824         xmlFree(schema->defTab);
825     }
826 
827     xmlFree(schema);
828 }
829 
830 /**
831  * xmlRelaxNGNewGrammar:
832  * @ctxt:  a Relax-NG validation context (optional)
833  *
834  * Allocate a new RelaxNG grammar.
835  *
836  * Returns the newly allocated structure or NULL in case or error
837  */
838 static xmlRelaxNGGrammarPtr
xmlRelaxNGNewGrammar(xmlRelaxNGParserCtxtPtr ctxt)839 xmlRelaxNGNewGrammar(xmlRelaxNGParserCtxtPtr ctxt)
840 {
841     xmlRelaxNGGrammarPtr ret;
842 
843     ret = (xmlRelaxNGGrammarPtr) xmlMalloc(sizeof(xmlRelaxNGGrammar));
844     if (ret == NULL) {
845         xmlRngPErrMemory(ctxt, NULL);
846         return (NULL);
847     }
848     memset(ret, 0, sizeof(xmlRelaxNGGrammar));
849 
850     return (ret);
851 }
852 
853 /**
854  * xmlRelaxNGFreeGrammar:
855  * @grammar:  a grammar structure
856  *
857  * Deallocate a RelaxNG grammar structure.
858  */
859 static void
xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar)860 xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar)
861 {
862     if (grammar == NULL)
863         return;
864 
865     if (grammar->children != NULL) {
866         xmlRelaxNGFreeGrammar(grammar->children);
867     }
868     if (grammar->next != NULL) {
869         xmlRelaxNGFreeGrammar(grammar->next);
870     }
871     if (grammar->refs != NULL) {
872         xmlHashFree(grammar->refs, NULL);
873     }
874     if (grammar->defs != NULL) {
875         xmlHashFree(grammar->defs, NULL);
876     }
877 
878     xmlFree(grammar);
879 }
880 
881 /**
882  * xmlRelaxNGNewDefine:
883  * @ctxt:  a Relax-NG validation context
884  * @node:  the node in the input document.
885  *
886  * Allocate a new RelaxNG define.
887  *
888  * Returns the newly allocated structure or NULL in case or error
889  */
890 static xmlRelaxNGDefinePtr
xmlRelaxNGNewDefine(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)891 xmlRelaxNGNewDefine(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
892 {
893     xmlRelaxNGDefinePtr ret;
894 
895     if (ctxt->defMax == 0) {
896         ctxt->defMax = 16;
897         ctxt->defNr = 0;
898         ctxt->defTab = (xmlRelaxNGDefinePtr *)
899             xmlMalloc(ctxt->defMax * sizeof(xmlRelaxNGDefinePtr));
900         if (ctxt->defTab == NULL) {
901             xmlRngPErrMemory(ctxt, "allocating define\n");
902             return (NULL);
903         }
904     } else if (ctxt->defMax <= ctxt->defNr) {
905         xmlRelaxNGDefinePtr *tmp;
906 
907         ctxt->defMax *= 2;
908         tmp = (xmlRelaxNGDefinePtr *) xmlRealloc(ctxt->defTab,
909                                                  ctxt->defMax *
910                                                  sizeof
911                                                  (xmlRelaxNGDefinePtr));
912         if (tmp == NULL) {
913             xmlRngPErrMemory(ctxt, "allocating define\n");
914             return (NULL);
915         }
916         ctxt->defTab = tmp;
917     }
918     ret = (xmlRelaxNGDefinePtr) xmlMalloc(sizeof(xmlRelaxNGDefine));
919     if (ret == NULL) {
920         xmlRngPErrMemory(ctxt, "allocating define\n");
921         return (NULL);
922     }
923     memset(ret, 0, sizeof(xmlRelaxNGDefine));
924     ctxt->defTab[ctxt->defNr++] = ret;
925     ret->node = node;
926     ret->depth = -1;
927     return (ret);
928 }
929 
930 /**
931  * xmlRelaxNGFreePartition:
932  * @partitions:  a partition set structure
933  *
934  * Deallocate RelaxNG partition set structures.
935  */
936 static void
xmlRelaxNGFreePartition(xmlRelaxNGPartitionPtr partitions)937 xmlRelaxNGFreePartition(xmlRelaxNGPartitionPtr partitions)
938 {
939     xmlRelaxNGInterleaveGroupPtr group;
940     int j;
941 
942     if (partitions != NULL) {
943         if (partitions->groups != NULL) {
944             for (j = 0; j < partitions->nbgroups; j++) {
945                 group = partitions->groups[j];
946                 if (group != NULL) {
947                     if (group->defs != NULL)
948                         xmlFree(group->defs);
949                     if (group->attrs != NULL)
950                         xmlFree(group->attrs);
951                     xmlFree(group);
952                 }
953             }
954             xmlFree(partitions->groups);
955         }
956         if (partitions->triage != NULL) {
957             xmlHashFree(partitions->triage, NULL);
958         }
959         xmlFree(partitions);
960     }
961 }
962 
963 /**
964  * xmlRelaxNGFreeDefine:
965  * @define:  a define structure
966  *
967  * Deallocate a RelaxNG define structure.
968  */
969 static void
xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define)970 xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define)
971 {
972     if (define == NULL)
973         return;
974 
975     if ((define->type == XML_RELAXNG_VALUE) && (define->attrs != NULL)) {
976         xmlRelaxNGTypeLibraryPtr lib;
977 
978         lib = (xmlRelaxNGTypeLibraryPtr) define->data;
979         if ((lib != NULL) && (lib->freef != NULL))
980             lib->freef(lib->data, (void *) define->attrs);
981     }
982     if ((define->data != NULL) && (define->type == XML_RELAXNG_INTERLEAVE))
983         xmlRelaxNGFreePartition((xmlRelaxNGPartitionPtr) define->data);
984     if ((define->data != NULL) && (define->type == XML_RELAXNG_CHOICE))
985         xmlHashFree((xmlHashTablePtr) define->data, NULL);
986     if (define->name != NULL)
987         xmlFree(define->name);
988     if (define->ns != NULL)
989         xmlFree(define->ns);
990     if (define->value != NULL)
991         xmlFree(define->value);
992     if (define->contModel != NULL)
993         xmlRegFreeRegexp(define->contModel);
994     xmlFree(define);
995 }
996 
997 /**
998  * xmlRelaxNGNewStates:
999  * @ctxt:  a Relax-NG validation context
1000  * @size:  the default size for the container
1001  *
1002  * Allocate a new RelaxNG validation state container
1003  *
1004  * Returns the newly allocated structure or NULL in case or error
1005  */
1006 static xmlRelaxNGStatesPtr
xmlRelaxNGNewStates(xmlRelaxNGValidCtxtPtr ctxt,int size)1007 xmlRelaxNGNewStates(xmlRelaxNGValidCtxtPtr ctxt, int size)
1008 {
1009     xmlRelaxNGStatesPtr ret;
1010 
1011     if ((ctxt != NULL) &&
1012         (ctxt->freeStates != NULL) && (ctxt->freeStatesNr > 0)) {
1013         ctxt->freeStatesNr--;
1014         ret = ctxt->freeStates[ctxt->freeStatesNr];
1015         ret->nbState = 0;
1016         return (ret);
1017     }
1018     if (size < 16)
1019         size = 16;
1020 
1021     ret = (xmlRelaxNGStatesPtr) xmlMalloc(sizeof(xmlRelaxNGStates) +
1022                                           (size -
1023                                            1) *
1024                                           sizeof(xmlRelaxNGValidStatePtr));
1025     if (ret == NULL) {
1026         xmlRngVErrMemory(ctxt, "allocating states\n");
1027         return (NULL);
1028     }
1029     ret->nbState = 0;
1030     ret->maxState = size;
1031     ret->tabState = (xmlRelaxNGValidStatePtr *) xmlMalloc((size) *
1032                                                           sizeof
1033                                                           (xmlRelaxNGValidStatePtr));
1034     if (ret->tabState == NULL) {
1035         xmlRngVErrMemory(ctxt, "allocating states\n");
1036         xmlFree(ret);
1037         return (NULL);
1038     }
1039     return (ret);
1040 }
1041 
1042 /**
1043  * xmlRelaxNGAddStateUniq:
1044  * @ctxt:  a Relax-NG validation context
1045  * @states:  the states container
1046  * @state:  the validation state
1047  *
1048  * Add a RelaxNG validation state to the container without checking
1049  * for unicity.
1050  *
1051  * Return 1 in case of success and 0 if this is a duplicate and -1 on error
1052  */
1053 static int
xmlRelaxNGAddStatesUniq(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGStatesPtr states,xmlRelaxNGValidStatePtr state)1054 xmlRelaxNGAddStatesUniq(xmlRelaxNGValidCtxtPtr ctxt,
1055                         xmlRelaxNGStatesPtr states,
1056                         xmlRelaxNGValidStatePtr state)
1057 {
1058     if (state == NULL) {
1059         return (-1);
1060     }
1061     if (states->nbState >= states->maxState) {
1062         xmlRelaxNGValidStatePtr *tmp;
1063         int size;
1064 
1065         size = states->maxState * 2;
1066         tmp = (xmlRelaxNGValidStatePtr *) xmlRealloc(states->tabState,
1067                                                      (size) *
1068                                                      sizeof
1069                                                      (xmlRelaxNGValidStatePtr));
1070         if (tmp == NULL) {
1071             xmlRngVErrMemory(ctxt, "adding states\n");
1072             return (-1);
1073         }
1074         states->tabState = tmp;
1075         states->maxState = size;
1076     }
1077     states->tabState[states->nbState++] = state;
1078     return (1);
1079 }
1080 
1081 /**
1082  * xmlRelaxNGAddState:
1083  * @ctxt:  a Relax-NG validation context
1084  * @states:  the states container
1085  * @state:  the validation state
1086  *
1087  * Add a RelaxNG validation state to the container
1088  *
1089  * Return 1 in case of success and 0 if this is a duplicate and -1 on error
1090  */
1091 static int
xmlRelaxNGAddStates(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGStatesPtr states,xmlRelaxNGValidStatePtr state)1092 xmlRelaxNGAddStates(xmlRelaxNGValidCtxtPtr ctxt,
1093                     xmlRelaxNGStatesPtr states,
1094                     xmlRelaxNGValidStatePtr state)
1095 {
1096     int i;
1097 
1098     if (state == NULL || states == NULL) {
1099         return (-1);
1100     }
1101     if (states->nbState >= states->maxState) {
1102         xmlRelaxNGValidStatePtr *tmp;
1103         int size;
1104 
1105         size = states->maxState * 2;
1106         tmp = (xmlRelaxNGValidStatePtr *) xmlRealloc(states->tabState,
1107                                                      (size) *
1108                                                      sizeof
1109                                                      (xmlRelaxNGValidStatePtr));
1110         if (tmp == NULL) {
1111             xmlRngVErrMemory(ctxt, "adding states\n");
1112             return (-1);
1113         }
1114         states->tabState = tmp;
1115         states->maxState = size;
1116     }
1117     for (i = 0; i < states->nbState; i++) {
1118         if (xmlRelaxNGEqualValidState(ctxt, state, states->tabState[i])) {
1119             xmlRelaxNGFreeValidState(ctxt, state);
1120             return (0);
1121         }
1122     }
1123     states->tabState[states->nbState++] = state;
1124     return (1);
1125 }
1126 
1127 /**
1128  * xmlRelaxNGFreeStates:
1129  * @ctxt:  a Relax-NG validation context
1130  * @states:  teh container
1131  *
1132  * Free a RelaxNG validation state container
1133  */
1134 static void
xmlRelaxNGFreeStates(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGStatesPtr states)1135 xmlRelaxNGFreeStates(xmlRelaxNGValidCtxtPtr ctxt,
1136                      xmlRelaxNGStatesPtr states)
1137 {
1138     if (states == NULL)
1139         return;
1140     if ((ctxt != NULL) && (ctxt->freeStates == NULL)) {
1141         ctxt->freeStatesMax = 40;
1142         ctxt->freeStatesNr = 0;
1143         ctxt->freeStates = (xmlRelaxNGStatesPtr *)
1144             xmlMalloc(ctxt->freeStatesMax * sizeof(xmlRelaxNGStatesPtr));
1145         if (ctxt->freeStates == NULL) {
1146             xmlRngVErrMemory(ctxt, "storing states\n");
1147         }
1148     } else if ((ctxt != NULL)
1149                && (ctxt->freeStatesNr >= ctxt->freeStatesMax)) {
1150         xmlRelaxNGStatesPtr *tmp;
1151 
1152         tmp = (xmlRelaxNGStatesPtr *) xmlRealloc(ctxt->freeStates,
1153                                                  2 * ctxt->freeStatesMax *
1154                                                  sizeof
1155                                                  (xmlRelaxNGStatesPtr));
1156         if (tmp == NULL) {
1157             xmlRngVErrMemory(ctxt, "storing states\n");
1158             xmlFree(states->tabState);
1159             xmlFree(states);
1160             return;
1161         }
1162         ctxt->freeStates = tmp;
1163         ctxt->freeStatesMax *= 2;
1164     }
1165     if ((ctxt == NULL) || (ctxt->freeStates == NULL)) {
1166         xmlFree(states->tabState);
1167         xmlFree(states);
1168     } else {
1169         ctxt->freeStates[ctxt->freeStatesNr++] = states;
1170     }
1171 }
1172 
1173 /**
1174  * xmlRelaxNGNewValidState:
1175  * @ctxt:  a Relax-NG validation context
1176  * @node:  the current node or NULL for the document
1177  *
1178  * Allocate a new RelaxNG validation state
1179  *
1180  * Returns the newly allocated structure or NULL in case or error
1181  */
1182 static xmlRelaxNGValidStatePtr
xmlRelaxNGNewValidState(xmlRelaxNGValidCtxtPtr ctxt,xmlNodePtr node)1183 xmlRelaxNGNewValidState(xmlRelaxNGValidCtxtPtr ctxt, xmlNodePtr node)
1184 {
1185     xmlRelaxNGValidStatePtr ret;
1186     xmlAttrPtr attr;
1187     xmlAttrPtr attrs[MAX_ATTR];
1188     int nbAttrs = 0;
1189     xmlNodePtr root = NULL;
1190 
1191     if (node == NULL) {
1192         root = xmlDocGetRootElement(ctxt->doc);
1193         if (root == NULL)
1194             return (NULL);
1195     } else {
1196         attr = node->properties;
1197         while (attr != NULL) {
1198             if (nbAttrs < MAX_ATTR)
1199                 attrs[nbAttrs++] = attr;
1200             else
1201                 nbAttrs++;
1202             attr = attr->next;
1203         }
1204     }
1205     if ((ctxt->freeState != NULL) && (ctxt->freeState->nbState > 0)) {
1206         ctxt->freeState->nbState--;
1207         ret = ctxt->freeState->tabState[ctxt->freeState->nbState];
1208     } else {
1209         ret =
1210             (xmlRelaxNGValidStatePtr)
1211             xmlMalloc(sizeof(xmlRelaxNGValidState));
1212         if (ret == NULL) {
1213             xmlRngVErrMemory(ctxt, "allocating states\n");
1214             return (NULL);
1215         }
1216         memset(ret, 0, sizeof(xmlRelaxNGValidState));
1217     }
1218     ret->value = NULL;
1219     ret->endvalue = NULL;
1220     if (node == NULL) {
1221         ret->node = (xmlNodePtr) ctxt->doc;
1222         ret->seq = root;
1223     } else {
1224         ret->node = node;
1225         ret->seq = node->children;
1226     }
1227     ret->nbAttrs = 0;
1228     if (nbAttrs > 0) {
1229         if (ret->attrs == NULL) {
1230             if (nbAttrs < 4)
1231                 ret->maxAttrs = 4;
1232             else
1233                 ret->maxAttrs = nbAttrs;
1234             ret->attrs = (xmlAttrPtr *) xmlMalloc(ret->maxAttrs *
1235                                                   sizeof(xmlAttrPtr));
1236             if (ret->attrs == NULL) {
1237                 xmlRngVErrMemory(ctxt, "allocating states\n");
1238                 return (ret);
1239             }
1240         } else if (ret->maxAttrs < nbAttrs) {
1241             xmlAttrPtr *tmp;
1242 
1243             tmp = (xmlAttrPtr *) xmlRealloc(ret->attrs, nbAttrs *
1244                                             sizeof(xmlAttrPtr));
1245             if (tmp == NULL) {
1246                 xmlRngVErrMemory(ctxt, "allocating states\n");
1247                 return (ret);
1248             }
1249             ret->attrs = tmp;
1250             ret->maxAttrs = nbAttrs;
1251         }
1252         ret->nbAttrs = nbAttrs;
1253         if (nbAttrs < MAX_ATTR) {
1254             memcpy(ret->attrs, attrs, sizeof(xmlAttrPtr) * nbAttrs);
1255         } else {
1256             attr = node->properties;
1257             nbAttrs = 0;
1258             while (attr != NULL) {
1259                 ret->attrs[nbAttrs++] = attr;
1260                 attr = attr->next;
1261             }
1262         }
1263     }
1264     ret->nbAttrLeft = ret->nbAttrs;
1265     return (ret);
1266 }
1267 
1268 /**
1269  * xmlRelaxNGCopyValidState:
1270  * @ctxt:  a Relax-NG validation context
1271  * @state:  a validation state
1272  *
1273  * Copy the validation state
1274  *
1275  * Returns the newly allocated structure or NULL in case or error
1276  */
1277 static xmlRelaxNGValidStatePtr
xmlRelaxNGCopyValidState(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidStatePtr state)1278 xmlRelaxNGCopyValidState(xmlRelaxNGValidCtxtPtr ctxt,
1279                          xmlRelaxNGValidStatePtr state)
1280 {
1281     xmlRelaxNGValidStatePtr ret;
1282     unsigned int maxAttrs;
1283     xmlAttrPtr *attrs;
1284 
1285     if (state == NULL)
1286         return (NULL);
1287     if ((ctxt->freeState != NULL) && (ctxt->freeState->nbState > 0)) {
1288         ctxt->freeState->nbState--;
1289         ret = ctxt->freeState->tabState[ctxt->freeState->nbState];
1290     } else {
1291         ret =
1292             (xmlRelaxNGValidStatePtr)
1293             xmlMalloc(sizeof(xmlRelaxNGValidState));
1294         if (ret == NULL) {
1295             xmlRngVErrMemory(ctxt, "allocating states\n");
1296             return (NULL);
1297         }
1298         memset(ret, 0, sizeof(xmlRelaxNGValidState));
1299     }
1300     attrs = ret->attrs;
1301     maxAttrs = ret->maxAttrs;
1302     memcpy(ret, state, sizeof(xmlRelaxNGValidState));
1303     ret->attrs = attrs;
1304     ret->maxAttrs = maxAttrs;
1305     if (state->nbAttrs > 0) {
1306         if (ret->attrs == NULL) {
1307             ret->maxAttrs = state->maxAttrs;
1308             ret->attrs = (xmlAttrPtr *) xmlMalloc(ret->maxAttrs *
1309                                                   sizeof(xmlAttrPtr));
1310             if (ret->attrs == NULL) {
1311                 xmlRngVErrMemory(ctxt, "allocating states\n");
1312                 ret->nbAttrs = 0;
1313                 return (ret);
1314             }
1315         } else if (ret->maxAttrs < state->nbAttrs) {
1316             xmlAttrPtr *tmp;
1317 
1318             tmp = (xmlAttrPtr *) xmlRealloc(ret->attrs, state->maxAttrs *
1319                                             sizeof(xmlAttrPtr));
1320             if (tmp == NULL) {
1321                 xmlRngVErrMemory(ctxt, "allocating states\n");
1322                 ret->nbAttrs = 0;
1323                 return (ret);
1324             }
1325             ret->maxAttrs = state->maxAttrs;
1326             ret->attrs = tmp;
1327         }
1328         memcpy(ret->attrs, state->attrs,
1329                state->nbAttrs * sizeof(xmlAttrPtr));
1330     }
1331     return (ret);
1332 }
1333 
1334 /**
1335  * xmlRelaxNGEqualValidState:
1336  * @ctxt:  a Relax-NG validation context
1337  * @state1:  a validation state
1338  * @state2:  a validation state
1339  *
1340  * Compare the validation states for equality
1341  *
1342  * Returns 1 if equald, 0 otherwise
1343  */
1344 static int
xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,xmlRelaxNGValidStatePtr state1,xmlRelaxNGValidStatePtr state2)1345 xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,
1346                           xmlRelaxNGValidStatePtr state1,
1347                           xmlRelaxNGValidStatePtr state2)
1348 {
1349     int i;
1350 
1351     if ((state1 == NULL) || (state2 == NULL))
1352         return (0);
1353     if (state1 == state2)
1354         return (1);
1355     if (state1->node != state2->node)
1356         return (0);
1357     if (state1->seq != state2->seq)
1358         return (0);
1359     if (state1->nbAttrLeft != state2->nbAttrLeft)
1360         return (0);
1361     if (state1->nbAttrs != state2->nbAttrs)
1362         return (0);
1363     if (state1->endvalue != state2->endvalue)
1364         return (0);
1365     if ((state1->value != state2->value) &&
1366         (!xmlStrEqual(state1->value, state2->value)))
1367         return (0);
1368     for (i = 0; i < state1->nbAttrs; i++) {
1369         if (state1->attrs[i] != state2->attrs[i])
1370             return (0);
1371     }
1372     return (1);
1373 }
1374 
1375 /**
1376  * xmlRelaxNGFreeValidState:
1377  * @state:  a validation state structure
1378  *
1379  * Deallocate a RelaxNG validation state structure.
1380  */
1381 static void
xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidStatePtr state)1382 xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,
1383                          xmlRelaxNGValidStatePtr state)
1384 {
1385     if (state == NULL)
1386         return;
1387 
1388     if ((ctxt != NULL) && (ctxt->freeState == NULL)) {
1389         ctxt->freeState = xmlRelaxNGNewStates(ctxt, 40);
1390     }
1391     if ((ctxt == NULL) || (ctxt->freeState == NULL)) {
1392         if (state->attrs != NULL)
1393             xmlFree(state->attrs);
1394         xmlFree(state);
1395     } else {
1396         xmlRelaxNGAddStatesUniq(ctxt, ctxt->freeState, state);
1397     }
1398 }
1399 
1400 /************************************************************************
1401  *									*
1402  *			Semi internal functions				*
1403  *									*
1404  ************************************************************************/
1405 
1406 /**
1407  * xmlRelaxParserSetFlag:
1408  * @ctxt: a RelaxNG parser context
1409  * @flags: a set of flags values
1410  *
1411  * Semi private function used to pass informations to a parser context
1412  * which are a combination of xmlRelaxNGParserFlag .
1413  *
1414  * Returns 0 if success and -1 in case of error
1415  */
1416 int
xmlRelaxParserSetFlag(xmlRelaxNGParserCtxtPtr ctxt,int flags)1417 xmlRelaxParserSetFlag(xmlRelaxNGParserCtxtPtr ctxt, int flags)
1418 {
1419     if (ctxt == NULL) return(-1);
1420     if (flags & XML_RELAXNGP_FREE_DOC) {
1421         ctxt->crng |= XML_RELAXNGP_FREE_DOC;
1422 	flags -= XML_RELAXNGP_FREE_DOC;
1423     }
1424     if (flags & XML_RELAXNGP_CRNG) {
1425         ctxt->crng |= XML_RELAXNGP_CRNG;
1426 	flags -= XML_RELAXNGP_CRNG;
1427     }
1428     if (flags != 0) return(-1);
1429     return(0);
1430 }
1431 
1432 /************************************************************************
1433  *									*
1434  *			Document functions				*
1435  *									*
1436  ************************************************************************/
1437 static xmlDocPtr xmlRelaxNGCleanupDoc(xmlRelaxNGParserCtxtPtr ctxt,
1438                                       xmlDocPtr doc);
1439 
1440 /**
1441  * xmlRelaxNGIncludePush:
1442  * @ctxt:  the parser context
1443  * @value:  the element doc
1444  *
1445  * Pushes a new include on top of the include stack
1446  *
1447  * Returns 0 in case of error, the index in the stack otherwise
1448  */
1449 static int
xmlRelaxNGIncludePush(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGIncludePtr value)1450 xmlRelaxNGIncludePush(xmlRelaxNGParserCtxtPtr ctxt,
1451                       xmlRelaxNGIncludePtr value)
1452 {
1453     if (ctxt->incTab == NULL) {
1454         ctxt->incMax = 4;
1455         ctxt->incNr = 0;
1456         ctxt->incTab =
1457             (xmlRelaxNGIncludePtr *) xmlMalloc(ctxt->incMax *
1458                                                sizeof(ctxt->incTab[0]));
1459         if (ctxt->incTab == NULL) {
1460             xmlRngPErrMemory(ctxt, "allocating include\n");
1461             return (0);
1462         }
1463     }
1464     if (ctxt->incNr >= ctxt->incMax) {
1465         ctxt->incMax *= 2;
1466         ctxt->incTab =
1467             (xmlRelaxNGIncludePtr *) xmlRealloc(ctxt->incTab,
1468                                                 ctxt->incMax *
1469                                                 sizeof(ctxt->incTab[0]));
1470         if (ctxt->incTab == NULL) {
1471             xmlRngPErrMemory(ctxt, "allocating include\n");
1472             return (0);
1473         }
1474     }
1475     ctxt->incTab[ctxt->incNr] = value;
1476     ctxt->inc = value;
1477     return (ctxt->incNr++);
1478 }
1479 
1480 /**
1481  * xmlRelaxNGIncludePop:
1482  * @ctxt: the parser context
1483  *
1484  * Pops the top include from the include stack
1485  *
1486  * Returns the include just removed
1487  */
1488 static xmlRelaxNGIncludePtr
xmlRelaxNGIncludePop(xmlRelaxNGParserCtxtPtr ctxt)1489 xmlRelaxNGIncludePop(xmlRelaxNGParserCtxtPtr ctxt)
1490 {
1491     xmlRelaxNGIncludePtr ret;
1492 
1493     if (ctxt->incNr <= 0)
1494         return (NULL);
1495     ctxt->incNr--;
1496     if (ctxt->incNr > 0)
1497         ctxt->inc = ctxt->incTab[ctxt->incNr - 1];
1498     else
1499         ctxt->inc = NULL;
1500     ret = ctxt->incTab[ctxt->incNr];
1501     ctxt->incTab[ctxt->incNr] = NULL;
1502     return (ret);
1503 }
1504 
1505 /**
1506  * xmlRelaxNGRemoveRedefine:
1507  * @ctxt: the parser context
1508  * @URL:  the normalized URL
1509  * @target:  the included target
1510  * @name:  the define name to eliminate
1511  *
1512  * Applies the elimination algorithm of 4.7
1513  *
1514  * Returns 0 in case of error, 1 in case of success.
1515  */
1516 static int
xmlRelaxNGRemoveRedefine(xmlRelaxNGParserCtxtPtr ctxt,const xmlChar * URL ATTRIBUTE_UNUSED,xmlNodePtr target,const xmlChar * name)1517 xmlRelaxNGRemoveRedefine(xmlRelaxNGParserCtxtPtr ctxt,
1518                          const xmlChar * URL ATTRIBUTE_UNUSED,
1519                          xmlNodePtr target, const xmlChar * name)
1520 {
1521     int found = 0;
1522     xmlNodePtr tmp, tmp2;
1523     xmlChar *name2;
1524 
1525 #ifdef DEBUG_INCLUDE
1526     if (name == NULL)
1527         xmlGenericError(xmlGenericErrorContext,
1528                         "Elimination of <include> start from %s\n", URL);
1529     else
1530         xmlGenericError(xmlGenericErrorContext,
1531                         "Elimination of <include> define %s from %s\n",
1532                         name, URL);
1533 #endif
1534     tmp = target;
1535     while (tmp != NULL) {
1536         tmp2 = tmp->next;
1537         if ((name == NULL) && (IS_RELAXNG(tmp, "start"))) {
1538             found = 1;
1539             xmlUnlinkNode(tmp);
1540             xmlFreeNode(tmp);
1541         } else if ((name != NULL) && (IS_RELAXNG(tmp, "define"))) {
1542             name2 = xmlGetProp(tmp, BAD_CAST "name");
1543             xmlRelaxNGNormExtSpace(name2);
1544             if (name2 != NULL) {
1545                 if (xmlStrEqual(name, name2)) {
1546                     found = 1;
1547                     xmlUnlinkNode(tmp);
1548                     xmlFreeNode(tmp);
1549                 }
1550                 xmlFree(name2);
1551             }
1552         } else if (IS_RELAXNG(tmp, "include")) {
1553             xmlChar *href = NULL;
1554             xmlRelaxNGDocumentPtr inc = tmp->psvi;
1555 
1556             if ((inc != NULL) && (inc->doc != NULL) &&
1557                 (inc->doc->children != NULL)) {
1558 
1559                 if (xmlStrEqual
1560                     (inc->doc->children->name, BAD_CAST "grammar")) {
1561 #ifdef DEBUG_INCLUDE
1562                     href = xmlGetProp(tmp, BAD_CAST "href");
1563 #endif
1564                     if (xmlRelaxNGRemoveRedefine(ctxt, href,
1565                                                  xmlDocGetRootElement(inc->doc)->children,
1566                                                  name) == 1) {
1567                         found = 1;
1568                     }
1569 #ifdef DEBUG_INCLUDE
1570                     if (href != NULL)
1571                         xmlFree(href);
1572 #endif
1573                 }
1574             }
1575         }
1576         tmp = tmp2;
1577     }
1578     return (found);
1579 }
1580 
1581 /**
1582  * xmlRelaxNGLoadInclude:
1583  * @ctxt: the parser context
1584  * @URL:  the normalized URL
1585  * @node: the include node.
1586  * @ns:  the namespace passed from the context.
1587  *
1588  * First lookup if the document is already loaded into the parser context,
1589  * check against recursion. If not found the resource is loaded and
1590  * the content is preprocessed before being returned back to the caller.
1591  *
1592  * Returns the xmlRelaxNGIncludePtr or NULL in case of error
1593  */
1594 static xmlRelaxNGIncludePtr
xmlRelaxNGLoadInclude(xmlRelaxNGParserCtxtPtr ctxt,const xmlChar * URL,xmlNodePtr node,const xmlChar * ns)1595 xmlRelaxNGLoadInclude(xmlRelaxNGParserCtxtPtr ctxt, const xmlChar * URL,
1596                       xmlNodePtr node, const xmlChar * ns)
1597 {
1598     xmlRelaxNGIncludePtr ret = NULL;
1599     xmlDocPtr doc;
1600     int i;
1601     xmlNodePtr root, cur;
1602 
1603 #ifdef DEBUG_INCLUDE
1604     xmlGenericError(xmlGenericErrorContext,
1605                     "xmlRelaxNGLoadInclude(%s)\n", URL);
1606 #endif
1607 
1608     /*
1609      * check against recursion in the stack
1610      */
1611     for (i = 0; i < ctxt->incNr; i++) {
1612         if (xmlStrEqual(ctxt->incTab[i]->href, URL)) {
1613             xmlRngPErr(ctxt, NULL, XML_RNGP_INCLUDE_RECURSE,
1614                        "Detected an Include recursion for %s\n", URL,
1615                        NULL);
1616             return (NULL);
1617         }
1618     }
1619 
1620     /*
1621      * load the document
1622      */
1623     doc = xmlReadFile((const char *) URL,NULL,0);
1624     if (doc == NULL) {
1625         xmlRngPErr(ctxt, node, XML_RNGP_PARSE_ERROR,
1626                    "xmlRelaxNG: could not load %s\n", URL, NULL);
1627         return (NULL);
1628     }
1629 #ifdef DEBUG_INCLUDE
1630     xmlGenericError(xmlGenericErrorContext, "Parsed %s Okay\n", URL);
1631 #endif
1632 
1633     /*
1634      * Allocate the document structures and register it first.
1635      */
1636     ret = (xmlRelaxNGIncludePtr) xmlMalloc(sizeof(xmlRelaxNGInclude));
1637     if (ret == NULL) {
1638         xmlRngPErrMemory(ctxt, "allocating include\n");
1639         xmlFreeDoc(doc);
1640         return (NULL);
1641     }
1642     memset(ret, 0, sizeof(xmlRelaxNGInclude));
1643     ret->doc = doc;
1644     ret->href = xmlStrdup(URL);
1645     ret->next = ctxt->includes;
1646     ctxt->includes = ret;
1647 
1648     /*
1649      * transmit the ns if needed
1650      */
1651     if (ns != NULL) {
1652         root = xmlDocGetRootElement(doc);
1653         if (root != NULL) {
1654             if (xmlHasProp(root, BAD_CAST "ns") == NULL) {
1655                 xmlSetProp(root, BAD_CAST "ns", ns);
1656             }
1657         }
1658     }
1659 
1660     /*
1661      * push it on the stack
1662      */
1663     xmlRelaxNGIncludePush(ctxt, ret);
1664 
1665     /*
1666      * Some preprocessing of the document content, this include recursing
1667      * in the include stack.
1668      */
1669 #ifdef DEBUG_INCLUDE
1670     xmlGenericError(xmlGenericErrorContext, "cleanup of %s\n", URL);
1671 #endif
1672 
1673     doc = xmlRelaxNGCleanupDoc(ctxt, doc);
1674     if (doc == NULL) {
1675         ctxt->inc = NULL;
1676         return (NULL);
1677     }
1678 
1679     /*
1680      * Pop up the include from the stack
1681      */
1682     xmlRelaxNGIncludePop(ctxt);
1683 
1684 #ifdef DEBUG_INCLUDE
1685     xmlGenericError(xmlGenericErrorContext, "Checking of %s\n", URL);
1686 #endif
1687     /*
1688      * Check that the top element is a grammar
1689      */
1690     root = xmlDocGetRootElement(doc);
1691     if (root == NULL) {
1692         xmlRngPErr(ctxt, node, XML_RNGP_EMPTY,
1693                    "xmlRelaxNG: included document is empty %s\n", URL,
1694                    NULL);
1695         return (NULL);
1696     }
1697     if (!IS_RELAXNG(root, "grammar")) {
1698         xmlRngPErr(ctxt, node, XML_RNGP_GRAMMAR_MISSING,
1699                    "xmlRelaxNG: included document %s root is not a grammar\n",
1700                    URL, NULL);
1701         return (NULL);
1702     }
1703 
1704     /*
1705      * Elimination of redefined rules in the include.
1706      */
1707     cur = node->children;
1708     while (cur != NULL) {
1709         if (IS_RELAXNG(cur, "start")) {
1710             int found = 0;
1711 
1712             found =
1713                 xmlRelaxNGRemoveRedefine(ctxt, URL, root->children, NULL);
1714             if (!found) {
1715                 xmlRngPErr(ctxt, node, XML_RNGP_START_MISSING,
1716                            "xmlRelaxNG: include %s has a start but not the included grammar\n",
1717                            URL, NULL);
1718             }
1719         } else if (IS_RELAXNG(cur, "define")) {
1720             xmlChar *name;
1721 
1722             name = xmlGetProp(cur, BAD_CAST "name");
1723             if (name == NULL) {
1724                 xmlRngPErr(ctxt, node, XML_RNGP_NAME_MISSING,
1725                            "xmlRelaxNG: include %s has define without name\n",
1726                            URL, NULL);
1727             } else {
1728                 int found;
1729 
1730                 xmlRelaxNGNormExtSpace(name);
1731                 found = xmlRelaxNGRemoveRedefine(ctxt, URL,
1732                                                  root->children, name);
1733                 if (!found) {
1734                     xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_MISSING,
1735                                "xmlRelaxNG: include %s has a define %s but not the included grammar\n",
1736                                URL, name);
1737                 }
1738                 xmlFree(name);
1739             }
1740         }
1741         cur = cur->next;
1742     }
1743 
1744 
1745     return (ret);
1746 }
1747 
1748 /**
1749  * xmlRelaxNGValidErrorPush:
1750  * @ctxt:  the validation context
1751  * @err:  the error code
1752  * @arg1:  the first string argument
1753  * @arg2:  the second string argument
1754  * @dup:  arg need to be duplicated
1755  *
1756  * Pushes a new error on top of the error stack
1757  *
1758  * Returns 0 in case of error, the index in the stack otherwise
1759  */
1760 static int
xmlRelaxNGValidErrorPush(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidErr err,const xmlChar * arg1,const xmlChar * arg2,int dup)1761 xmlRelaxNGValidErrorPush(xmlRelaxNGValidCtxtPtr ctxt,
1762                          xmlRelaxNGValidErr err, const xmlChar * arg1,
1763                          const xmlChar * arg2, int dup)
1764 {
1765     xmlRelaxNGValidErrorPtr cur;
1766 
1767 #ifdef DEBUG_ERROR
1768     xmlGenericError(xmlGenericErrorContext,
1769                     "Pushing error %d at %d on stack\n", err, ctxt->errNr);
1770 #endif
1771     if (ctxt->errTab == NULL) {
1772         ctxt->errMax = 8;
1773         ctxt->errNr = 0;
1774         ctxt->errTab =
1775             (xmlRelaxNGValidErrorPtr) xmlMalloc(ctxt->errMax *
1776                                                 sizeof
1777                                                 (xmlRelaxNGValidError));
1778         if (ctxt->errTab == NULL) {
1779             xmlRngVErrMemory(ctxt, "pushing error\n");
1780             return (0);
1781         }
1782         ctxt->err = NULL;
1783     }
1784     if (ctxt->errNr >= ctxt->errMax) {
1785         ctxt->errMax *= 2;
1786         ctxt->errTab =
1787             (xmlRelaxNGValidErrorPtr) xmlRealloc(ctxt->errTab,
1788                                                  ctxt->errMax *
1789                                                  sizeof
1790                                                  (xmlRelaxNGValidError));
1791         if (ctxt->errTab == NULL) {
1792             xmlRngVErrMemory(ctxt, "pushing error\n");
1793             return (0);
1794         }
1795         ctxt->err = &ctxt->errTab[ctxt->errNr - 1];
1796     }
1797     if ((ctxt->err != NULL) && (ctxt->state != NULL) &&
1798         (ctxt->err->node == ctxt->state->node) && (ctxt->err->err == err))
1799         return (ctxt->errNr);
1800     cur = &ctxt->errTab[ctxt->errNr];
1801     cur->err = err;
1802     if (dup) {
1803         cur->arg1 = xmlStrdup(arg1);
1804         cur->arg2 = xmlStrdup(arg2);
1805         cur->flags = ERROR_IS_DUP;
1806     } else {
1807         cur->arg1 = arg1;
1808         cur->arg2 = arg2;
1809         cur->flags = 0;
1810     }
1811     if (ctxt->state != NULL) {
1812         cur->node = ctxt->state->node;
1813         cur->seq = ctxt->state->seq;
1814     } else {
1815         cur->node = NULL;
1816         cur->seq = NULL;
1817     }
1818     ctxt->err = cur;
1819     return (ctxt->errNr++);
1820 }
1821 
1822 /**
1823  * xmlRelaxNGValidErrorPop:
1824  * @ctxt: the validation context
1825  *
1826  * Pops the top error from the error stack
1827  */
1828 static void
xmlRelaxNGValidErrorPop(xmlRelaxNGValidCtxtPtr ctxt)1829 xmlRelaxNGValidErrorPop(xmlRelaxNGValidCtxtPtr ctxt)
1830 {
1831     xmlRelaxNGValidErrorPtr cur;
1832 
1833     if (ctxt->errNr <= 0) {
1834         ctxt->err = NULL;
1835         return;
1836     }
1837     ctxt->errNr--;
1838     if (ctxt->errNr > 0)
1839         ctxt->err = &ctxt->errTab[ctxt->errNr - 1];
1840     else
1841         ctxt->err = NULL;
1842     cur = &ctxt->errTab[ctxt->errNr];
1843     if (cur->flags & ERROR_IS_DUP) {
1844         if (cur->arg1 != NULL)
1845             xmlFree((xmlChar *) cur->arg1);
1846         cur->arg1 = NULL;
1847         if (cur->arg2 != NULL)
1848             xmlFree((xmlChar *) cur->arg2);
1849         cur->arg2 = NULL;
1850         cur->flags = 0;
1851     }
1852 }
1853 
1854 /**
1855  * xmlRelaxNGDocumentPush:
1856  * @ctxt:  the parser context
1857  * @value:  the element doc
1858  *
1859  * Pushes a new doc on top of the doc stack
1860  *
1861  * Returns 0 in case of error, the index in the stack otherwise
1862  */
1863 static int
xmlRelaxNGDocumentPush(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDocumentPtr value)1864 xmlRelaxNGDocumentPush(xmlRelaxNGParserCtxtPtr ctxt,
1865                        xmlRelaxNGDocumentPtr value)
1866 {
1867     if (ctxt->docTab == NULL) {
1868         ctxt->docMax = 4;
1869         ctxt->docNr = 0;
1870         ctxt->docTab =
1871             (xmlRelaxNGDocumentPtr *) xmlMalloc(ctxt->docMax *
1872                                                 sizeof(ctxt->docTab[0]));
1873         if (ctxt->docTab == NULL) {
1874             xmlRngPErrMemory(ctxt, "adding document\n");
1875             return (0);
1876         }
1877     }
1878     if (ctxt->docNr >= ctxt->docMax) {
1879         ctxt->docMax *= 2;
1880         ctxt->docTab =
1881             (xmlRelaxNGDocumentPtr *) xmlRealloc(ctxt->docTab,
1882                                                  ctxt->docMax *
1883                                                  sizeof(ctxt->docTab[0]));
1884         if (ctxt->docTab == NULL) {
1885             xmlRngPErrMemory(ctxt, "adding document\n");
1886             return (0);
1887         }
1888     }
1889     ctxt->docTab[ctxt->docNr] = value;
1890     ctxt->doc = value;
1891     return (ctxt->docNr++);
1892 }
1893 
1894 /**
1895  * xmlRelaxNGDocumentPop:
1896  * @ctxt: the parser context
1897  *
1898  * Pops the top doc from the doc stack
1899  *
1900  * Returns the doc just removed
1901  */
1902 static xmlRelaxNGDocumentPtr
xmlRelaxNGDocumentPop(xmlRelaxNGParserCtxtPtr ctxt)1903 xmlRelaxNGDocumentPop(xmlRelaxNGParserCtxtPtr ctxt)
1904 {
1905     xmlRelaxNGDocumentPtr ret;
1906 
1907     if (ctxt->docNr <= 0)
1908         return (NULL);
1909     ctxt->docNr--;
1910     if (ctxt->docNr > 0)
1911         ctxt->doc = ctxt->docTab[ctxt->docNr - 1];
1912     else
1913         ctxt->doc = NULL;
1914     ret = ctxt->docTab[ctxt->docNr];
1915     ctxt->docTab[ctxt->docNr] = NULL;
1916     return (ret);
1917 }
1918 
1919 /**
1920  * xmlRelaxNGLoadExternalRef:
1921  * @ctxt: the parser context
1922  * @URL:  the normalized URL
1923  * @ns:  the inherited ns if any
1924  *
1925  * First lookup if the document is already loaded into the parser context,
1926  * check against recursion. If not found the resource is loaded and
1927  * the content is preprocessed before being returned back to the caller.
1928  *
1929  * Returns the xmlRelaxNGDocumentPtr or NULL in case of error
1930  */
1931 static xmlRelaxNGDocumentPtr
xmlRelaxNGLoadExternalRef(xmlRelaxNGParserCtxtPtr ctxt,const xmlChar * URL,const xmlChar * ns)1932 xmlRelaxNGLoadExternalRef(xmlRelaxNGParserCtxtPtr ctxt,
1933                           const xmlChar * URL, const xmlChar * ns)
1934 {
1935     xmlRelaxNGDocumentPtr ret = NULL;
1936     xmlDocPtr doc;
1937     xmlNodePtr root;
1938     int i;
1939 
1940     /*
1941      * check against recursion in the stack
1942      */
1943     for (i = 0; i < ctxt->docNr; i++) {
1944         if (xmlStrEqual(ctxt->docTab[i]->href, URL)) {
1945             xmlRngPErr(ctxt, NULL, XML_RNGP_EXTERNALREF_RECURSE,
1946                        "Detected an externalRef recursion for %s\n", URL,
1947                        NULL);
1948             return (NULL);
1949         }
1950     }
1951 
1952     /*
1953      * load the document
1954      */
1955     doc = xmlReadFile((const char *) URL,NULL,0);
1956     if (doc == NULL) {
1957         xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
1958                    "xmlRelaxNG: could not load %s\n", URL, NULL);
1959         return (NULL);
1960     }
1961 
1962     /*
1963      * Allocate the document structures and register it first.
1964      */
1965     ret = (xmlRelaxNGDocumentPtr) xmlMalloc(sizeof(xmlRelaxNGDocument));
1966     if (ret == NULL) {
1967         xmlRngPErr(ctxt, (xmlNodePtr) doc, XML_ERR_NO_MEMORY,
1968                    "xmlRelaxNG: allocate memory for doc %s\n", URL, NULL);
1969         xmlFreeDoc(doc);
1970         return (NULL);
1971     }
1972     memset(ret, 0, sizeof(xmlRelaxNGDocument));
1973     ret->doc = doc;
1974     ret->href = xmlStrdup(URL);
1975     ret->next = ctxt->documents;
1976     ret->externalRef = 1;
1977     ctxt->documents = ret;
1978 
1979     /*
1980      * transmit the ns if needed
1981      */
1982     if (ns != NULL) {
1983         root = xmlDocGetRootElement(doc);
1984         if (root != NULL) {
1985             if (xmlHasProp(root, BAD_CAST "ns") == NULL) {
1986                 xmlSetProp(root, BAD_CAST "ns", ns);
1987             }
1988         }
1989     }
1990 
1991     /*
1992      * push it on the stack and register it in the hash table
1993      */
1994     xmlRelaxNGDocumentPush(ctxt, ret);
1995 
1996     /*
1997      * Some preprocessing of the document content
1998      */
1999     doc = xmlRelaxNGCleanupDoc(ctxt, doc);
2000     if (doc == NULL) {
2001         ctxt->doc = NULL;
2002         return (NULL);
2003     }
2004 
2005     xmlRelaxNGDocumentPop(ctxt);
2006 
2007     return (ret);
2008 }
2009 
2010 /************************************************************************
2011  *									*
2012  *			Error functions					*
2013  *									*
2014  ************************************************************************/
2015 
2016 #define VALID_ERR(a) xmlRelaxNGAddValidError(ctxt, a, NULL, NULL, 0);
2017 #define VALID_ERR2(a, b) xmlRelaxNGAddValidError(ctxt, a, b, NULL, 0);
2018 #define VALID_ERR3(a, b, c) xmlRelaxNGAddValidError(ctxt, a, b, c, 0);
2019 #define VALID_ERR2P(a, b) xmlRelaxNGAddValidError(ctxt, a, b, NULL, 1);
2020 #define VALID_ERR3P(a, b, c) xmlRelaxNGAddValidError(ctxt, a, b, c, 1);
2021 
2022 static const char *
xmlRelaxNGDefName(xmlRelaxNGDefinePtr def)2023 xmlRelaxNGDefName(xmlRelaxNGDefinePtr def)
2024 {
2025     if (def == NULL)
2026         return ("none");
2027     switch (def->type) {
2028         case XML_RELAXNG_EMPTY:
2029             return ("empty");
2030         case XML_RELAXNG_NOT_ALLOWED:
2031             return ("notAllowed");
2032         case XML_RELAXNG_EXCEPT:
2033             return ("except");
2034         case XML_RELAXNG_TEXT:
2035             return ("text");
2036         case XML_RELAXNG_ELEMENT:
2037             return ("element");
2038         case XML_RELAXNG_DATATYPE:
2039             return ("datatype");
2040         case XML_RELAXNG_VALUE:
2041             return ("value");
2042         case XML_RELAXNG_LIST:
2043             return ("list");
2044         case XML_RELAXNG_ATTRIBUTE:
2045             return ("attribute");
2046         case XML_RELAXNG_DEF:
2047             return ("def");
2048         case XML_RELAXNG_REF:
2049             return ("ref");
2050         case XML_RELAXNG_EXTERNALREF:
2051             return ("externalRef");
2052         case XML_RELAXNG_PARENTREF:
2053             return ("parentRef");
2054         case XML_RELAXNG_OPTIONAL:
2055             return ("optional");
2056         case XML_RELAXNG_ZEROORMORE:
2057             return ("zeroOrMore");
2058         case XML_RELAXNG_ONEORMORE:
2059             return ("oneOrMore");
2060         case XML_RELAXNG_CHOICE:
2061             return ("choice");
2062         case XML_RELAXNG_GROUP:
2063             return ("group");
2064         case XML_RELAXNG_INTERLEAVE:
2065             return ("interleave");
2066         case XML_RELAXNG_START:
2067             return ("start");
2068         case XML_RELAXNG_NOOP:
2069             return ("noop");
2070         case XML_RELAXNG_PARAM:
2071             return ("param");
2072     }
2073     return ("unknown");
2074 }
2075 
2076 /**
2077  * xmlRelaxNGGetErrorString:
2078  * @err:  the error code
2079  * @arg1:  the first string argument
2080  * @arg2:  the second string argument
2081  *
2082  * computes a formatted error string for the given error code and args
2083  *
2084  * Returns the error string, it must be deallocated by the caller
2085  */
2086 static xmlChar *
xmlRelaxNGGetErrorString(xmlRelaxNGValidErr err,const xmlChar * arg1,const xmlChar * arg2)2087 xmlRelaxNGGetErrorString(xmlRelaxNGValidErr err, const xmlChar * arg1,
2088                          const xmlChar * arg2)
2089 {
2090     char msg[1000];
2091 
2092     if (arg1 == NULL)
2093         arg1 = BAD_CAST "";
2094     if (arg2 == NULL)
2095         arg2 = BAD_CAST "";
2096 
2097     msg[0] = 0;
2098     switch (err) {
2099         case XML_RELAXNG_OK:
2100             return (NULL);
2101         case XML_RELAXNG_ERR_MEMORY:
2102             return (xmlCharStrdup("out of memory\n"));
2103         case XML_RELAXNG_ERR_TYPE:
2104             snprintf(msg, 1000, "failed to validate type %s\n", arg1);
2105             break;
2106         case XML_RELAXNG_ERR_TYPEVAL:
2107             snprintf(msg, 1000, "Type %s doesn't allow value '%s'\n", arg1,
2108                      arg2);
2109             break;
2110         case XML_RELAXNG_ERR_DUPID:
2111             snprintf(msg, 1000, "ID %s redefined\n", arg1);
2112             break;
2113         case XML_RELAXNG_ERR_TYPECMP:
2114             snprintf(msg, 1000, "failed to compare type %s\n", arg1);
2115             break;
2116         case XML_RELAXNG_ERR_NOSTATE:
2117             return (xmlCharStrdup("Internal error: no state\n"));
2118         case XML_RELAXNG_ERR_NODEFINE:
2119             return (xmlCharStrdup("Internal error: no define\n"));
2120         case XML_RELAXNG_ERR_INTERNAL:
2121             snprintf(msg, 1000, "Internal error: %s\n", arg1);
2122             break;
2123         case XML_RELAXNG_ERR_LISTEXTRA:
2124             snprintf(msg, 1000, "Extra data in list: %s\n", arg1);
2125             break;
2126         case XML_RELAXNG_ERR_INTERNODATA:
2127             return (xmlCharStrdup
2128                     ("Internal: interleave block has no data\n"));
2129         case XML_RELAXNG_ERR_INTERSEQ:
2130             return (xmlCharStrdup("Invalid sequence in interleave\n"));
2131         case XML_RELAXNG_ERR_INTEREXTRA:
2132             snprintf(msg, 1000, "Extra element %s in interleave\n", arg1);
2133             break;
2134         case XML_RELAXNG_ERR_ELEMNAME:
2135             snprintf(msg, 1000, "Expecting element %s, got %s\n", arg1,
2136                      arg2);
2137             break;
2138         case XML_RELAXNG_ERR_ELEMNONS:
2139             snprintf(msg, 1000, "Expecting a namespace for element %s\n",
2140                      arg1);
2141             break;
2142         case XML_RELAXNG_ERR_ELEMWRONGNS:
2143             snprintf(msg, 1000,
2144                      "Element %s has wrong namespace: expecting %s\n", arg1,
2145                      arg2);
2146             break;
2147         case XML_RELAXNG_ERR_ELEMWRONG:
2148             snprintf(msg, 1000, "Did not expect element %s there\n", arg1);
2149             break;
2150         case XML_RELAXNG_ERR_TEXTWRONG:
2151             snprintf(msg, 1000,
2152                      "Did not expect text in element %s content\n", arg1);
2153             break;
2154         case XML_RELAXNG_ERR_ELEMEXTRANS:
2155             snprintf(msg, 1000, "Expecting no namespace for element %s\n",
2156                      arg1);
2157             break;
2158         case XML_RELAXNG_ERR_ELEMNOTEMPTY:
2159             snprintf(msg, 1000, "Expecting element %s to be empty\n", arg1);
2160             break;
2161         case XML_RELAXNG_ERR_NOELEM:
2162             snprintf(msg, 1000, "Expecting an element %s, got nothing\n",
2163                      arg1);
2164             break;
2165         case XML_RELAXNG_ERR_NOTELEM:
2166             return (xmlCharStrdup("Expecting an element got text\n"));
2167         case XML_RELAXNG_ERR_ATTRVALID:
2168             snprintf(msg, 1000, "Element %s failed to validate attributes\n",
2169                      arg1);
2170             break;
2171         case XML_RELAXNG_ERR_CONTENTVALID:
2172             snprintf(msg, 1000, "Element %s failed to validate content\n",
2173                      arg1);
2174             break;
2175         case XML_RELAXNG_ERR_EXTRACONTENT:
2176             snprintf(msg, 1000, "Element %s has extra content: %s\n",
2177                      arg1, arg2);
2178             break;
2179         case XML_RELAXNG_ERR_INVALIDATTR:
2180             snprintf(msg, 1000, "Invalid attribute %s for element %s\n",
2181                      arg1, arg2);
2182             break;
2183         case XML_RELAXNG_ERR_LACKDATA:
2184             snprintf(msg, 1000, "Datatype element %s contains no data\n",
2185                      arg1);
2186             break;
2187         case XML_RELAXNG_ERR_DATAELEM:
2188             snprintf(msg, 1000, "Datatype element %s has child elements\n",
2189                      arg1);
2190             break;
2191         case XML_RELAXNG_ERR_VALELEM:
2192             snprintf(msg, 1000, "Value element %s has child elements\n",
2193                      arg1);
2194             break;
2195         case XML_RELAXNG_ERR_LISTELEM:
2196             snprintf(msg, 1000, "List element %s has child elements\n",
2197                      arg1);
2198             break;
2199         case XML_RELAXNG_ERR_DATATYPE:
2200             snprintf(msg, 1000, "Error validating datatype %s\n", arg1);
2201             break;
2202         case XML_RELAXNG_ERR_VALUE:
2203             snprintf(msg, 1000, "Error validating value %s\n", arg1);
2204             break;
2205         case XML_RELAXNG_ERR_LIST:
2206             return (xmlCharStrdup("Error validating list\n"));
2207         case XML_RELAXNG_ERR_NOGRAMMAR:
2208             return (xmlCharStrdup("No top grammar defined\n"));
2209         case XML_RELAXNG_ERR_EXTRADATA:
2210             return (xmlCharStrdup("Extra data in the document\n"));
2211         default:
2212             return (xmlCharStrdup("Unknown error !\n"));
2213     }
2214     if (msg[0] == 0) {
2215         snprintf(msg, 1000, "Unknown error code %d\n", err);
2216     }
2217     msg[1000 - 1] = 0;
2218     return (xmlStrdup((xmlChar *) msg));
2219 }
2220 
2221 /**
2222  * xmlRelaxNGShowValidError:
2223  * @ctxt:  the validation context
2224  * @err:  the error number
2225  * @node:  the node
2226  * @child:  the node child generating the problem.
2227  * @arg1:  the first argument
2228  * @arg2:  the second argument
2229  *
2230  * Show a validation error.
2231  */
2232 static void
xmlRelaxNGShowValidError(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidErr err,xmlNodePtr node,xmlNodePtr child,const xmlChar * arg1,const xmlChar * arg2)2233 xmlRelaxNGShowValidError(xmlRelaxNGValidCtxtPtr ctxt,
2234                          xmlRelaxNGValidErr err, xmlNodePtr node,
2235                          xmlNodePtr child, const xmlChar * arg1,
2236                          const xmlChar * arg2)
2237 {
2238     xmlChar *msg;
2239 
2240     if (ctxt->flags & FLAGS_NOERROR)
2241         return;
2242 
2243 #ifdef DEBUG_ERROR
2244     xmlGenericError(xmlGenericErrorContext, "Show error %d\n", err);
2245 #endif
2246     msg = xmlRelaxNGGetErrorString(err, arg1, arg2);
2247     if (msg == NULL)
2248         return;
2249 
2250     if (ctxt->errNo == XML_RELAXNG_OK)
2251         ctxt->errNo = err;
2252     xmlRngVErr(ctxt, (child == NULL ? node : child), err,
2253                (const char *) msg, arg1, arg2);
2254     xmlFree(msg);
2255 }
2256 
2257 /**
2258  * xmlRelaxNGPopErrors:
2259  * @ctxt:  the validation context
2260  * @level:  the error level in the stack
2261  *
2262  * pop and discard all errors until the given level is reached
2263  */
2264 static void
xmlRelaxNGPopErrors(xmlRelaxNGValidCtxtPtr ctxt,int level)2265 xmlRelaxNGPopErrors(xmlRelaxNGValidCtxtPtr ctxt, int level)
2266 {
2267     int i;
2268     xmlRelaxNGValidErrorPtr err;
2269 
2270 #ifdef DEBUG_ERROR
2271     xmlGenericError(xmlGenericErrorContext,
2272                     "Pop errors till level %d\n", level);
2273 #endif
2274     for (i = level; i < ctxt->errNr; i++) {
2275         err = &ctxt->errTab[i];
2276         if (err->flags & ERROR_IS_DUP) {
2277             if (err->arg1 != NULL)
2278                 xmlFree((xmlChar *) err->arg1);
2279             err->arg1 = NULL;
2280             if (err->arg2 != NULL)
2281                 xmlFree((xmlChar *) err->arg2);
2282             err->arg2 = NULL;
2283             err->flags = 0;
2284         }
2285     }
2286     ctxt->errNr = level;
2287     if (ctxt->errNr <= 0)
2288         ctxt->err = NULL;
2289 }
2290 
2291 /**
2292  * xmlRelaxNGDumpValidError:
2293  * @ctxt:  the validation context
2294  *
2295  * Show all validation error over a given index.
2296  */
2297 static void
xmlRelaxNGDumpValidError(xmlRelaxNGValidCtxtPtr ctxt)2298 xmlRelaxNGDumpValidError(xmlRelaxNGValidCtxtPtr ctxt)
2299 {
2300     int i, j, k;
2301     xmlRelaxNGValidErrorPtr err, dup;
2302 
2303 #ifdef DEBUG_ERROR
2304     xmlGenericError(xmlGenericErrorContext,
2305                     "Dumping error stack %d errors\n", ctxt->errNr);
2306 #endif
2307     for (i = 0, k = 0; i < ctxt->errNr; i++) {
2308         err = &ctxt->errTab[i];
2309         if (k < MAX_ERROR) {
2310             for (j = 0; j < i; j++) {
2311                 dup = &ctxt->errTab[j];
2312                 if ((err->err == dup->err) && (err->node == dup->node) &&
2313                     (xmlStrEqual(err->arg1, dup->arg1)) &&
2314                     (xmlStrEqual(err->arg2, dup->arg2))) {
2315                     goto skip;
2316                 }
2317             }
2318             xmlRelaxNGShowValidError(ctxt, err->err, err->node, err->seq,
2319                                      err->arg1, err->arg2);
2320             k++;
2321         }
2322       skip:
2323         if (err->flags & ERROR_IS_DUP) {
2324             if (err->arg1 != NULL)
2325                 xmlFree((xmlChar *) err->arg1);
2326             err->arg1 = NULL;
2327             if (err->arg2 != NULL)
2328                 xmlFree((xmlChar *) err->arg2);
2329             err->arg2 = NULL;
2330             err->flags = 0;
2331         }
2332     }
2333     ctxt->errNr = 0;
2334 }
2335 
2336 /**
2337  * xmlRelaxNGAddValidError:
2338  * @ctxt:  the validation context
2339  * @err:  the error number
2340  * @arg1:  the first argument
2341  * @arg2:  the second argument
2342  * @dup:  need to dup the args
2343  *
2344  * Register a validation error, either generating it if it's sure
2345  * or stacking it for later handling if unsure.
2346  */
2347 static void
xmlRelaxNGAddValidError(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidErr err,const xmlChar * arg1,const xmlChar * arg2,int dup)2348 xmlRelaxNGAddValidError(xmlRelaxNGValidCtxtPtr ctxt,
2349                         xmlRelaxNGValidErr err, const xmlChar * arg1,
2350                         const xmlChar * arg2, int dup)
2351 {
2352     if (ctxt == NULL)
2353         return;
2354     if (ctxt->flags & FLAGS_NOERROR)
2355         return;
2356 
2357 #ifdef DEBUG_ERROR
2358     xmlGenericError(xmlGenericErrorContext, "Adding error %d\n", err);
2359 #endif
2360     /*
2361      * generate the error directly
2362      */
2363     if (((ctxt->flags & FLAGS_IGNORABLE) == 0) ||
2364 	 (ctxt->flags & FLAGS_NEGATIVE)) {
2365         xmlNodePtr node, seq;
2366 
2367         /*
2368          * Flush first any stacked error which might be the
2369          * real cause of the problem.
2370          */
2371         if (ctxt->errNr != 0)
2372             xmlRelaxNGDumpValidError(ctxt);
2373         if (ctxt->state != NULL) {
2374             node = ctxt->state->node;
2375             seq = ctxt->state->seq;
2376         } else {
2377             node = seq = NULL;
2378         }
2379         if ((node == NULL) && (seq == NULL)) {
2380             node = ctxt->pnode;
2381         }
2382         xmlRelaxNGShowValidError(ctxt, err, node, seq, arg1, arg2);
2383     }
2384     /*
2385      * Stack the error for later processing if needed
2386      */
2387     else {
2388         xmlRelaxNGValidErrorPush(ctxt, err, arg1, arg2, dup);
2389     }
2390 }
2391 
2392 
2393 /************************************************************************
2394  *									*
2395  *			Type library hooks				*
2396  *									*
2397  ************************************************************************/
2398 static xmlChar *xmlRelaxNGNormalize(xmlRelaxNGValidCtxtPtr ctxt,
2399                                     const xmlChar * str);
2400 
2401 /**
2402  * xmlRelaxNGSchemaTypeHave:
2403  * @data:  data needed for the library
2404  * @type:  the type name
2405  *
2406  * Check if the given type is provided by
2407  * the W3C XMLSchema Datatype library.
2408  *
2409  * Returns 1 if yes, 0 if no and -1 in case of error.
2410  */
2411 static int
xmlRelaxNGSchemaTypeHave(void * data ATTRIBUTE_UNUSED,const xmlChar * type)2412 xmlRelaxNGSchemaTypeHave(void *data ATTRIBUTE_UNUSED, const xmlChar * type)
2413 {
2414     xmlSchemaTypePtr typ;
2415 
2416     if (type == NULL)
2417         return (-1);
2418     typ = xmlSchemaGetPredefinedType(type,
2419                                      BAD_CAST
2420                                      "http://www.w3.org/2001/XMLSchema");
2421     if (typ == NULL)
2422         return (0);
2423     return (1);
2424 }
2425 
2426 /**
2427  * xmlRelaxNGSchemaTypeCheck:
2428  * @data:  data needed for the library
2429  * @type:  the type name
2430  * @value:  the value to check
2431  * @node:  the node
2432  *
2433  * Check if the given type and value are validated by
2434  * the W3C XMLSchema Datatype library.
2435  *
2436  * Returns 1 if yes, 0 if no and -1 in case of error.
2437  */
2438 static int
xmlRelaxNGSchemaTypeCheck(void * data ATTRIBUTE_UNUSED,const xmlChar * type,const xmlChar * value,void ** result,xmlNodePtr node)2439 xmlRelaxNGSchemaTypeCheck(void *data ATTRIBUTE_UNUSED,
2440                           const xmlChar * type,
2441                           const xmlChar * value,
2442                           void **result, xmlNodePtr node)
2443 {
2444     xmlSchemaTypePtr typ;
2445     int ret;
2446 
2447     if ((type == NULL) || (value == NULL))
2448         return (-1);
2449     typ = xmlSchemaGetPredefinedType(type,
2450                                      BAD_CAST
2451                                      "http://www.w3.org/2001/XMLSchema");
2452     if (typ == NULL)
2453         return (-1);
2454     ret = xmlSchemaValPredefTypeNode(typ, value,
2455                                      (xmlSchemaValPtr *) result, node);
2456     if (ret == 2)               /* special ID error code */
2457         return (2);
2458     if (ret == 0)
2459         return (1);
2460     if (ret > 0)
2461         return (0);
2462     return (-1);
2463 }
2464 
2465 /**
2466  * xmlRelaxNGSchemaFacetCheck:
2467  * @data:  data needed for the library
2468  * @type:  the type name
2469  * @facet:  the facet name
2470  * @val:  the facet value
2471  * @strval:  the string value
2472  * @value:  the value to check
2473  *
2474  * Function provided by a type library to check a value facet
2475  *
2476  * Returns 1 if yes, 0 if no and -1 in case of error.
2477  */
2478 static int
xmlRelaxNGSchemaFacetCheck(void * data ATTRIBUTE_UNUSED,const xmlChar * type,const xmlChar * facetname,const xmlChar * val,const xmlChar * strval,void * value)2479 xmlRelaxNGSchemaFacetCheck(void *data ATTRIBUTE_UNUSED,
2480                            const xmlChar * type, const xmlChar * facetname,
2481                            const xmlChar * val, const xmlChar * strval,
2482                            void *value)
2483 {
2484     xmlSchemaFacetPtr facet;
2485     xmlSchemaTypePtr typ;
2486     int ret;
2487 
2488     if ((type == NULL) || (strval == NULL))
2489         return (-1);
2490     typ = xmlSchemaGetPredefinedType(type,
2491                                      BAD_CAST
2492                                      "http://www.w3.org/2001/XMLSchema");
2493     if (typ == NULL)
2494         return (-1);
2495 
2496     facet = xmlSchemaNewFacet();
2497     if (facet == NULL)
2498         return (-1);
2499 
2500     if (xmlStrEqual(facetname, BAD_CAST "minInclusive")) {
2501         facet->type = XML_SCHEMA_FACET_MININCLUSIVE;
2502     } else if (xmlStrEqual(facetname, BAD_CAST "minExclusive")) {
2503         facet->type = XML_SCHEMA_FACET_MINEXCLUSIVE;
2504     } else if (xmlStrEqual(facetname, BAD_CAST "maxInclusive")) {
2505         facet->type = XML_SCHEMA_FACET_MAXINCLUSIVE;
2506     } else if (xmlStrEqual(facetname, BAD_CAST "maxExclusive")) {
2507         facet->type = XML_SCHEMA_FACET_MAXEXCLUSIVE;
2508     } else if (xmlStrEqual(facetname, BAD_CAST "totalDigits")) {
2509         facet->type = XML_SCHEMA_FACET_TOTALDIGITS;
2510     } else if (xmlStrEqual(facetname, BAD_CAST "fractionDigits")) {
2511         facet->type = XML_SCHEMA_FACET_FRACTIONDIGITS;
2512     } else if (xmlStrEqual(facetname, BAD_CAST "pattern")) {
2513         facet->type = XML_SCHEMA_FACET_PATTERN;
2514     } else if (xmlStrEqual(facetname, BAD_CAST "enumeration")) {
2515         facet->type = XML_SCHEMA_FACET_ENUMERATION;
2516     } else if (xmlStrEqual(facetname, BAD_CAST "whiteSpace")) {
2517         facet->type = XML_SCHEMA_FACET_WHITESPACE;
2518     } else if (xmlStrEqual(facetname, BAD_CAST "length")) {
2519         facet->type = XML_SCHEMA_FACET_LENGTH;
2520     } else if (xmlStrEqual(facetname, BAD_CAST "maxLength")) {
2521         facet->type = XML_SCHEMA_FACET_MAXLENGTH;
2522     } else if (xmlStrEqual(facetname, BAD_CAST "minLength")) {
2523         facet->type = XML_SCHEMA_FACET_MINLENGTH;
2524     } else {
2525         xmlSchemaFreeFacet(facet);
2526         return (-1);
2527     }
2528     facet->value = val;
2529     ret = xmlSchemaCheckFacet(facet, typ, NULL, type);
2530     if (ret != 0) {
2531         xmlSchemaFreeFacet(facet);
2532         return (-1);
2533     }
2534     ret = xmlSchemaValidateFacet(typ, facet, strval, value);
2535     xmlSchemaFreeFacet(facet);
2536     if (ret != 0)
2537         return (-1);
2538     return (0);
2539 }
2540 
2541 /**
2542  * xmlRelaxNGSchemaFreeValue:
2543  * @data:  data needed for the library
2544  * @value:  the value to free
2545  *
2546  * Function provided by a type library to free a Schemas value
2547  *
2548  * Returns 1 if yes, 0 if no and -1 in case of error.
2549  */
2550 static void
xmlRelaxNGSchemaFreeValue(void * data ATTRIBUTE_UNUSED,void * value)2551 xmlRelaxNGSchemaFreeValue(void *data ATTRIBUTE_UNUSED, void *value)
2552 {
2553     xmlSchemaFreeValue(value);
2554 }
2555 
2556 /**
2557  * xmlRelaxNGSchemaTypeCompare:
2558  * @data:  data needed for the library
2559  * @type:  the type name
2560  * @value1:  the first value
2561  * @value2:  the second value
2562  *
2563  * Compare two values for equality accordingly a type from the W3C XMLSchema
2564  * Datatype library.
2565  *
2566  * Returns 1 if equal, 0 if no and -1 in case of error.
2567  */
2568 static int
xmlRelaxNGSchemaTypeCompare(void * data ATTRIBUTE_UNUSED,const xmlChar * type,const xmlChar * value1,xmlNodePtr ctxt1,void * comp1,const xmlChar * value2,xmlNodePtr ctxt2)2569 xmlRelaxNGSchemaTypeCompare(void *data ATTRIBUTE_UNUSED,
2570                             const xmlChar * type,
2571                             const xmlChar * value1,
2572                             xmlNodePtr ctxt1,
2573                             void *comp1,
2574                             const xmlChar * value2, xmlNodePtr ctxt2)
2575 {
2576     int ret;
2577     xmlSchemaTypePtr typ;
2578     xmlSchemaValPtr res1 = NULL, res2 = NULL;
2579 
2580     if ((type == NULL) || (value1 == NULL) || (value2 == NULL))
2581         return (-1);
2582     typ = xmlSchemaGetPredefinedType(type,
2583                                      BAD_CAST
2584                                      "http://www.w3.org/2001/XMLSchema");
2585     if (typ == NULL)
2586         return (-1);
2587     if (comp1 == NULL) {
2588         ret = xmlSchemaValPredefTypeNode(typ, value1, &res1, ctxt1);
2589         if (ret != 0)
2590             return (-1);
2591         if (res1 == NULL)
2592             return (-1);
2593     } else {
2594         res1 = (xmlSchemaValPtr) comp1;
2595     }
2596     ret = xmlSchemaValPredefTypeNode(typ, value2, &res2, ctxt2);
2597     if (ret != 0) {
2598 	if (res1 != (xmlSchemaValPtr) comp1)
2599 	    xmlSchemaFreeValue(res1);
2600         return (-1);
2601     }
2602     ret = xmlSchemaCompareValues(res1, res2);
2603     if (res1 != (xmlSchemaValPtr) comp1)
2604         xmlSchemaFreeValue(res1);
2605     xmlSchemaFreeValue(res2);
2606     if (ret == -2)
2607         return (-1);
2608     if (ret == 0)
2609         return (1);
2610     return (0);
2611 }
2612 
2613 /**
2614  * xmlRelaxNGDefaultTypeHave:
2615  * @data:  data needed for the library
2616  * @type:  the type name
2617  *
2618  * Check if the given type is provided by
2619  * the default datatype library.
2620  *
2621  * Returns 1 if yes, 0 if no and -1 in case of error.
2622  */
2623 static int
xmlRelaxNGDefaultTypeHave(void * data ATTRIBUTE_UNUSED,const xmlChar * type)2624 xmlRelaxNGDefaultTypeHave(void *data ATTRIBUTE_UNUSED,
2625                           const xmlChar * type)
2626 {
2627     if (type == NULL)
2628         return (-1);
2629     if (xmlStrEqual(type, BAD_CAST "string"))
2630         return (1);
2631     if (xmlStrEqual(type, BAD_CAST "token"))
2632         return (1);
2633     return (0);
2634 }
2635 
2636 /**
2637  * xmlRelaxNGDefaultTypeCheck:
2638  * @data:  data needed for the library
2639  * @type:  the type name
2640  * @value:  the value to check
2641  * @node:  the node
2642  *
2643  * Check if the given type and value are validated by
2644  * the default datatype library.
2645  *
2646  * Returns 1 if yes, 0 if no and -1 in case of error.
2647  */
2648 static int
xmlRelaxNGDefaultTypeCheck(void * data ATTRIBUTE_UNUSED,const xmlChar * type ATTRIBUTE_UNUSED,const xmlChar * value ATTRIBUTE_UNUSED,void ** result ATTRIBUTE_UNUSED,xmlNodePtr node ATTRIBUTE_UNUSED)2649 xmlRelaxNGDefaultTypeCheck(void *data ATTRIBUTE_UNUSED,
2650                            const xmlChar * type ATTRIBUTE_UNUSED,
2651                            const xmlChar * value ATTRIBUTE_UNUSED,
2652                            void **result ATTRIBUTE_UNUSED,
2653                            xmlNodePtr node ATTRIBUTE_UNUSED)
2654 {
2655     if (value == NULL)
2656         return (-1);
2657     if (xmlStrEqual(type, BAD_CAST "string"))
2658         return (1);
2659     if (xmlStrEqual(type, BAD_CAST "token")) {
2660         return (1);
2661     }
2662 
2663     return (0);
2664 }
2665 
2666 /**
2667  * xmlRelaxNGDefaultTypeCompare:
2668  * @data:  data needed for the library
2669  * @type:  the type name
2670  * @value1:  the first value
2671  * @value2:  the second value
2672  *
2673  * Compare two values accordingly a type from the default
2674  * datatype library.
2675  *
2676  * Returns 1 if yes, 0 if no and -1 in case of error.
2677  */
2678 static int
xmlRelaxNGDefaultTypeCompare(void * data ATTRIBUTE_UNUSED,const xmlChar * type,const xmlChar * value1,xmlNodePtr ctxt1 ATTRIBUTE_UNUSED,void * comp1 ATTRIBUTE_UNUSED,const xmlChar * value2,xmlNodePtr ctxt2 ATTRIBUTE_UNUSED)2679 xmlRelaxNGDefaultTypeCompare(void *data ATTRIBUTE_UNUSED,
2680                              const xmlChar * type,
2681                              const xmlChar * value1,
2682                              xmlNodePtr ctxt1 ATTRIBUTE_UNUSED,
2683                              void *comp1 ATTRIBUTE_UNUSED,
2684                              const xmlChar * value2,
2685                              xmlNodePtr ctxt2 ATTRIBUTE_UNUSED)
2686 {
2687     int ret = -1;
2688 
2689     if (xmlStrEqual(type, BAD_CAST "string")) {
2690         ret = xmlStrEqual(value1, value2);
2691     } else if (xmlStrEqual(type, BAD_CAST "token")) {
2692         if (!xmlStrEqual(value1, value2)) {
2693             xmlChar *nval, *nvalue;
2694 
2695             /*
2696              * TODO: trivial optimizations are possible by
2697              * computing at compile-time
2698              */
2699             nval = xmlRelaxNGNormalize(NULL, value1);
2700             nvalue = xmlRelaxNGNormalize(NULL, value2);
2701 
2702             if ((nval == NULL) || (nvalue == NULL))
2703                 ret = -1;
2704             else if (xmlStrEqual(nval, nvalue))
2705                 ret = 1;
2706             else
2707                 ret = 0;
2708             if (nval != NULL)
2709                 xmlFree(nval);
2710             if (nvalue != NULL)
2711                 xmlFree(nvalue);
2712         } else
2713             ret = 1;
2714     }
2715     return (ret);
2716 }
2717 
2718 static int xmlRelaxNGTypeInitialized = 0;
2719 static xmlHashTablePtr xmlRelaxNGRegisteredTypes = NULL;
2720 
2721 /**
2722  * xmlRelaxNGFreeTypeLibrary:
2723  * @lib:  the type library structure
2724  * @namespace:  the URI bound to the library
2725  *
2726  * Free the structure associated to the type library
2727  */
2728 static void
xmlRelaxNGFreeTypeLibrary(xmlRelaxNGTypeLibraryPtr lib,const xmlChar * namespace ATTRIBUTE_UNUSED)2729 xmlRelaxNGFreeTypeLibrary(xmlRelaxNGTypeLibraryPtr lib,
2730                           const xmlChar * namespace ATTRIBUTE_UNUSED)
2731 {
2732     if (lib == NULL)
2733         return;
2734     if (lib->namespace != NULL)
2735         xmlFree((xmlChar *) lib->namespace);
2736     xmlFree(lib);
2737 }
2738 
2739 /**
2740  * xmlRelaxNGRegisterTypeLibrary:
2741  * @namespace:  the URI bound to the library
2742  * @data:  data associated to the library
2743  * @have:  the provide function
2744  * @check:  the checking function
2745  * @comp:  the comparison function
2746  *
2747  * Register a new type library
2748  *
2749  * Returns 0 in case of success and -1 in case of error.
2750  */
2751 static int
xmlRelaxNGRegisterTypeLibrary(const xmlChar * namespace,void * data,xmlRelaxNGTypeHave have,xmlRelaxNGTypeCheck check,xmlRelaxNGTypeCompare comp,xmlRelaxNGFacetCheck facet,xmlRelaxNGTypeFree freef)2752 xmlRelaxNGRegisterTypeLibrary(const xmlChar * namespace, void *data,
2753                               xmlRelaxNGTypeHave have,
2754                               xmlRelaxNGTypeCheck check,
2755                               xmlRelaxNGTypeCompare comp,
2756                               xmlRelaxNGFacetCheck facet,
2757                               xmlRelaxNGTypeFree freef)
2758 {
2759     xmlRelaxNGTypeLibraryPtr lib;
2760     int ret;
2761 
2762     if ((xmlRelaxNGRegisteredTypes == NULL) || (namespace == NULL) ||
2763         (check == NULL) || (comp == NULL))
2764         return (-1);
2765     if (xmlHashLookup(xmlRelaxNGRegisteredTypes, namespace) != NULL) {
2766         xmlGenericError(xmlGenericErrorContext,
2767                         "Relax-NG types library '%s' already registered\n",
2768                         namespace);
2769         return (-1);
2770     }
2771     lib =
2772         (xmlRelaxNGTypeLibraryPtr)
2773         xmlMalloc(sizeof(xmlRelaxNGTypeLibrary));
2774     if (lib == NULL) {
2775         xmlRngVErrMemory(NULL, "adding types library\n");
2776         return (-1);
2777     }
2778     memset(lib, 0, sizeof(xmlRelaxNGTypeLibrary));
2779     lib->namespace = xmlStrdup(namespace);
2780     lib->data = data;
2781     lib->have = have;
2782     lib->comp = comp;
2783     lib->check = check;
2784     lib->facet = facet;
2785     lib->freef = freef;
2786     ret = xmlHashAddEntry(xmlRelaxNGRegisteredTypes, namespace, lib);
2787     if (ret < 0) {
2788         xmlGenericError(xmlGenericErrorContext,
2789                         "Relax-NG types library failed to register '%s'\n",
2790                         namespace);
2791         xmlRelaxNGFreeTypeLibrary(lib, namespace);
2792         return (-1);
2793     }
2794     return (0);
2795 }
2796 
2797 /**
2798  * xmlRelaxNGInitTypes:
2799  *
2800  * Initilize the default type libraries.
2801  *
2802  * Returns 0 in case of success and -1 in case of error.
2803  */
2804 int
xmlRelaxNGInitTypes(void)2805 xmlRelaxNGInitTypes(void)
2806 {
2807     if (xmlRelaxNGTypeInitialized != 0)
2808         return (0);
2809     xmlRelaxNGRegisteredTypes = xmlHashCreate(10);
2810     if (xmlRelaxNGRegisteredTypes == NULL) {
2811         xmlGenericError(xmlGenericErrorContext,
2812                         "Failed to allocate sh table for Relax-NG types\n");
2813         return (-1);
2814     }
2815     xmlRelaxNGRegisterTypeLibrary(BAD_CAST
2816                                   "http://www.w3.org/2001/XMLSchema-datatypes",
2817                                   NULL, xmlRelaxNGSchemaTypeHave,
2818                                   xmlRelaxNGSchemaTypeCheck,
2819                                   xmlRelaxNGSchemaTypeCompare,
2820                                   xmlRelaxNGSchemaFacetCheck,
2821                                   xmlRelaxNGSchemaFreeValue);
2822     xmlRelaxNGRegisterTypeLibrary(xmlRelaxNGNs, NULL,
2823                                   xmlRelaxNGDefaultTypeHave,
2824                                   xmlRelaxNGDefaultTypeCheck,
2825                                   xmlRelaxNGDefaultTypeCompare, NULL,
2826                                   NULL);
2827     xmlRelaxNGTypeInitialized = 1;
2828     return (0);
2829 }
2830 
2831 /**
2832  * xmlRelaxNGCleanupTypes:
2833  *
2834  * Cleanup the default Schemas type library associated to RelaxNG
2835  */
2836 void
xmlRelaxNGCleanupTypes(void)2837 xmlRelaxNGCleanupTypes(void)
2838 {
2839     xmlSchemaCleanupTypes();
2840     if (xmlRelaxNGTypeInitialized == 0)
2841         return;
2842     xmlHashFree(xmlRelaxNGRegisteredTypes, (xmlHashDeallocator)
2843                 xmlRelaxNGFreeTypeLibrary);
2844     xmlRelaxNGTypeInitialized = 0;
2845 }
2846 
2847 /************************************************************************
2848  *									*
2849  *		Compiling element content into regexp			*
2850  *									*
2851  * Sometime the element content can be compiled into a pure regexp,	*
2852  * This allows a faster execution and streamability at that level	*
2853  *									*
2854  ************************************************************************/
2855 
2856 /* from automata.c but not exported */
2857 void xmlAutomataSetFlags(xmlAutomataPtr am, int flags);
2858 
2859 
2860 static int xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt,
2861                                 xmlRelaxNGDefinePtr def);
2862 
2863 /**
2864  * xmlRelaxNGIsCompileable:
2865  * @define:  the definition to check
2866  *
2867  * Check if a definition is nullable.
2868  *
2869  * Returns 1 if yes, 0 if no and -1 in case of error
2870  */
2871 static int
xmlRelaxNGIsCompileable(xmlRelaxNGDefinePtr def)2872 xmlRelaxNGIsCompileable(xmlRelaxNGDefinePtr def)
2873 {
2874     int ret = -1;
2875 
2876     if (def == NULL) {
2877         return (-1);
2878     }
2879     if ((def->type != XML_RELAXNG_ELEMENT) &&
2880         (def->dflags & IS_COMPILABLE))
2881         return (1);
2882     if ((def->type != XML_RELAXNG_ELEMENT) &&
2883         (def->dflags & IS_NOT_COMPILABLE))
2884         return (0);
2885     switch (def->type) {
2886         case XML_RELAXNG_NOOP:
2887             ret = xmlRelaxNGIsCompileable(def->content);
2888             break;
2889         case XML_RELAXNG_TEXT:
2890         case XML_RELAXNG_EMPTY:
2891             ret = 1;
2892             break;
2893         case XML_RELAXNG_ELEMENT:
2894             /*
2895              * Check if the element content is compileable
2896              */
2897             if (((def->dflags & IS_NOT_COMPILABLE) == 0) &&
2898                 ((def->dflags & IS_COMPILABLE) == 0)) {
2899                 xmlRelaxNGDefinePtr list;
2900 
2901                 list = def->content;
2902                 while (list != NULL) {
2903                     ret = xmlRelaxNGIsCompileable(list);
2904                     if (ret != 1)
2905                         break;
2906                     list = list->next;
2907                 }
2908 		/*
2909 		 * Because the routine is recursive, we must guard against
2910 		 * discovering both COMPILABLE and NOT_COMPILABLE
2911 		 */
2912                 if (ret == 0) {
2913 		    def->dflags &= ~IS_COMPILABLE;
2914                     def->dflags |= IS_NOT_COMPILABLE;
2915 		}
2916                 if ((ret == 1) && !(def->dflags &= IS_NOT_COMPILABLE))
2917                     def->dflags |= IS_COMPILABLE;
2918 #ifdef DEBUG_COMPILE
2919                 if (ret == 1) {
2920                     xmlGenericError(xmlGenericErrorContext,
2921                                     "element content for %s is compilable\n",
2922                                     def->name);
2923                 } else if (ret == 0) {
2924                     xmlGenericError(xmlGenericErrorContext,
2925                                     "element content for %s is not compilable\n",
2926                                     def->name);
2927                 } else {
2928                     xmlGenericError(xmlGenericErrorContext,
2929                                     "Problem in RelaxNGIsCompileable for element %s\n",
2930                                     def->name);
2931                 }
2932 #endif
2933             }
2934             /*
2935              * All elements return a compileable status unless they
2936              * are generic like anyName
2937              */
2938             if ((def->nameClass != NULL) || (def->name == NULL))
2939                 ret = 0;
2940             else
2941                 ret = 1;
2942             return (ret);
2943         case XML_RELAXNG_REF:
2944         case XML_RELAXNG_EXTERNALREF:
2945         case XML_RELAXNG_PARENTREF:
2946             if (def->depth == -20) {
2947                 return (1);
2948             } else {
2949                 xmlRelaxNGDefinePtr list;
2950 
2951                 def->depth = -20;
2952                 list = def->content;
2953                 while (list != NULL) {
2954                     ret = xmlRelaxNGIsCompileable(list);
2955                     if (ret != 1)
2956                         break;
2957                     list = list->next;
2958                 }
2959             }
2960             break;
2961         case XML_RELAXNG_START:
2962         case XML_RELAXNG_OPTIONAL:
2963         case XML_RELAXNG_ZEROORMORE:
2964         case XML_RELAXNG_ONEORMORE:
2965         case XML_RELAXNG_CHOICE:
2966         case XML_RELAXNG_GROUP:
2967         case XML_RELAXNG_DEF:{
2968                 xmlRelaxNGDefinePtr list;
2969 
2970                 list = def->content;
2971                 while (list != NULL) {
2972                     ret = xmlRelaxNGIsCompileable(list);
2973                     if (ret != 1)
2974                         break;
2975                     list = list->next;
2976                 }
2977                 break;
2978             }
2979         case XML_RELAXNG_EXCEPT:
2980         case XML_RELAXNG_ATTRIBUTE:
2981         case XML_RELAXNG_INTERLEAVE:
2982         case XML_RELAXNG_DATATYPE:
2983         case XML_RELAXNG_LIST:
2984         case XML_RELAXNG_PARAM:
2985         case XML_RELAXNG_VALUE:
2986         case XML_RELAXNG_NOT_ALLOWED:
2987             ret = 0;
2988             break;
2989     }
2990     if (ret == 0)
2991         def->dflags |= IS_NOT_COMPILABLE;
2992     if (ret == 1)
2993         def->dflags |= IS_COMPILABLE;
2994 #ifdef DEBUG_COMPILE
2995     if (ret == 1) {
2996         xmlGenericError(xmlGenericErrorContext,
2997                         "RelaxNGIsCompileable %s : true\n",
2998                         xmlRelaxNGDefName(def));
2999     } else if (ret == 0) {
3000         xmlGenericError(xmlGenericErrorContext,
3001                         "RelaxNGIsCompileable %s : false\n",
3002                         xmlRelaxNGDefName(def));
3003     } else {
3004         xmlGenericError(xmlGenericErrorContext,
3005                         "Problem in RelaxNGIsCompileable %s\n",
3006                         xmlRelaxNGDefName(def));
3007     }
3008 #endif
3009     return (ret);
3010 }
3011 
3012 /**
3013  * xmlRelaxNGCompile:
3014  * ctxt:  the RelaxNG parser context
3015  * @define:  the definition tree to compile
3016  *
3017  * Compile the set of definitions, it works recursively, till the
3018  * element boundaries, where it tries to compile the content if possible
3019  *
3020  * Returns 0 if success and -1 in case of error
3021  */
3022 static int
xmlRelaxNGCompile(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr def)3023 xmlRelaxNGCompile(xmlRelaxNGParserCtxtPtr ctxt, xmlRelaxNGDefinePtr def)
3024 {
3025     int ret = 0;
3026     xmlRelaxNGDefinePtr list;
3027 
3028     if ((ctxt == NULL) || (def == NULL))
3029         return (-1);
3030 
3031     switch (def->type) {
3032         case XML_RELAXNG_START:
3033             if ((xmlRelaxNGIsCompileable(def) == 1) && (def->depth != -25)) {
3034                 xmlAutomataPtr oldam = ctxt->am;
3035                 xmlAutomataStatePtr oldstate = ctxt->state;
3036 
3037                 def->depth = -25;
3038 
3039                 list = def->content;
3040                 ctxt->am = xmlNewAutomata();
3041                 if (ctxt->am == NULL)
3042                     return (-1);
3043 
3044                 /*
3045                  * assume identical strings but not same pointer are different
3046                  * atoms, needed for non-determinism detection
3047                  * That way if 2 elements with the same name are in a choice
3048                  * branch the automata is found non-deterministic and
3049                  * we fallback to the normal validation which does the right
3050                  * thing of exploring both choices.
3051                  */
3052                 xmlAutomataSetFlags(ctxt->am, 1);
3053 
3054                 ctxt->state = xmlAutomataGetInitState(ctxt->am);
3055                 while (list != NULL) {
3056                     xmlRelaxNGCompile(ctxt, list);
3057                     list = list->next;
3058                 }
3059                 xmlAutomataSetFinalState(ctxt->am, ctxt->state);
3060                 if (xmlAutomataIsDeterminist(ctxt->am))
3061                     def->contModel = xmlAutomataCompile(ctxt->am);
3062 
3063                 xmlFreeAutomata(ctxt->am);
3064                 ctxt->state = oldstate;
3065                 ctxt->am = oldam;
3066             }
3067             break;
3068         case XML_RELAXNG_ELEMENT:
3069             if ((ctxt->am != NULL) && (def->name != NULL)) {
3070                 ctxt->state = xmlAutomataNewTransition2(ctxt->am,
3071                                                         ctxt->state, NULL,
3072                                                         def->name, def->ns,
3073                                                         def);
3074             }
3075             if ((def->dflags & IS_COMPILABLE) && (def->depth != -25)) {
3076                 xmlAutomataPtr oldam = ctxt->am;
3077                 xmlAutomataStatePtr oldstate = ctxt->state;
3078 
3079                 def->depth = -25;
3080 
3081                 list = def->content;
3082                 ctxt->am = xmlNewAutomata();
3083                 if (ctxt->am == NULL)
3084                     return (-1);
3085                 xmlAutomataSetFlags(ctxt->am, 1);
3086                 ctxt->state = xmlAutomataGetInitState(ctxt->am);
3087                 while (list != NULL) {
3088                     xmlRelaxNGCompile(ctxt, list);
3089                     list = list->next;
3090                 }
3091                 xmlAutomataSetFinalState(ctxt->am, ctxt->state);
3092                 def->contModel = xmlAutomataCompile(ctxt->am);
3093                 if (!xmlRegexpIsDeterminist(def->contModel)) {
3094 #ifdef DEBUG_COMPILE
3095                     xmlGenericError(xmlGenericErrorContext,
3096                         "Content model not determinist %s\n",
3097                                     def->name);
3098 #endif
3099                     /*
3100                      * we can only use the automata if it is determinist
3101                      */
3102                     xmlRegFreeRegexp(def->contModel);
3103                     def->contModel = NULL;
3104                 }
3105                 xmlFreeAutomata(ctxt->am);
3106                 ctxt->state = oldstate;
3107                 ctxt->am = oldam;
3108             } else {
3109                 xmlAutomataPtr oldam = ctxt->am;
3110 
3111                 /*
3112                  * we can't build the content model for this element content
3113                  * but it still might be possible to build it for some of its
3114                  * children, recurse.
3115                  */
3116                 ret = xmlRelaxNGTryCompile(ctxt, def);
3117                 ctxt->am = oldam;
3118             }
3119             break;
3120         case XML_RELAXNG_NOOP:
3121             ret = xmlRelaxNGCompile(ctxt, def->content);
3122             break;
3123         case XML_RELAXNG_OPTIONAL:{
3124                 xmlAutomataStatePtr oldstate = ctxt->state;
3125 
3126                 list = def->content;
3127                 while (list != NULL) {
3128                     xmlRelaxNGCompile(ctxt, list);
3129                     list = list->next;
3130                 }
3131                 xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
3132                 break;
3133             }
3134         case XML_RELAXNG_ZEROORMORE:{
3135                 xmlAutomataStatePtr oldstate;
3136 
3137                 ctxt->state =
3138                     xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
3139                 oldstate = ctxt->state;
3140                 list = def->content;
3141                 while (list != NULL) {
3142                     xmlRelaxNGCompile(ctxt, list);
3143                     list = list->next;
3144                 }
3145                 xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldstate);
3146                 ctxt->state =
3147                     xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
3148                 break;
3149             }
3150         case XML_RELAXNG_ONEORMORE:{
3151                 xmlAutomataStatePtr oldstate;
3152 
3153                 list = def->content;
3154                 while (list != NULL) {
3155                     xmlRelaxNGCompile(ctxt, list);
3156                     list = list->next;
3157                 }
3158                 oldstate = ctxt->state;
3159                 list = def->content;
3160                 while (list != NULL) {
3161                     xmlRelaxNGCompile(ctxt, list);
3162                     list = list->next;
3163                 }
3164                 xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldstate);
3165                 ctxt->state =
3166                     xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
3167                 break;
3168             }
3169         case XML_RELAXNG_CHOICE:{
3170                 xmlAutomataStatePtr target = NULL;
3171                 xmlAutomataStatePtr oldstate = ctxt->state;
3172 
3173                 list = def->content;
3174                 while (list != NULL) {
3175                     ctxt->state = oldstate;
3176                     ret = xmlRelaxNGCompile(ctxt, list);
3177                     if (ret != 0)
3178                         break;
3179                     if (target == NULL)
3180                         target = ctxt->state;
3181                     else {
3182                         xmlAutomataNewEpsilon(ctxt->am, ctxt->state,
3183                                               target);
3184                     }
3185                     list = list->next;
3186                 }
3187                 ctxt->state = target;
3188 
3189                 break;
3190             }
3191         case XML_RELAXNG_REF:
3192         case XML_RELAXNG_EXTERNALREF:
3193         case XML_RELAXNG_PARENTREF:
3194         case XML_RELAXNG_GROUP:
3195         case XML_RELAXNG_DEF:
3196             list = def->content;
3197             while (list != NULL) {
3198                 ret = xmlRelaxNGCompile(ctxt, list);
3199                 if (ret != 0)
3200                     break;
3201                 list = list->next;
3202             }
3203             break;
3204         case XML_RELAXNG_TEXT:{
3205                 xmlAutomataStatePtr oldstate;
3206 
3207                 ctxt->state =
3208                     xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
3209                 oldstate = ctxt->state;
3210                 xmlRelaxNGCompile(ctxt, def->content);
3211                 xmlAutomataNewTransition(ctxt->am, ctxt->state,
3212                                          ctxt->state, BAD_CAST "#text",
3213                                          NULL);
3214                 ctxt->state =
3215                     xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
3216                 break;
3217             }
3218         case XML_RELAXNG_EMPTY:
3219             ctxt->state =
3220                 xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
3221             break;
3222         case XML_RELAXNG_EXCEPT:
3223         case XML_RELAXNG_ATTRIBUTE:
3224         case XML_RELAXNG_INTERLEAVE:
3225         case XML_RELAXNG_NOT_ALLOWED:
3226         case XML_RELAXNG_DATATYPE:
3227         case XML_RELAXNG_LIST:
3228         case XML_RELAXNG_PARAM:
3229         case XML_RELAXNG_VALUE:
3230             /* This should not happen and generate an internal error */
3231             fprintf(stderr, "RNG internal error trying to compile %s\n",
3232                     xmlRelaxNGDefName(def));
3233             break;
3234     }
3235     return (ret);
3236 }
3237 
3238 /**
3239  * xmlRelaxNGTryCompile:
3240  * ctxt:  the RelaxNG parser context
3241  * @define:  the definition tree to compile
3242  *
3243  * Try to compile the set of definitions, it works recursively,
3244  * possibly ignoring parts which cannot be compiled.
3245  *
3246  * Returns 0 if success and -1 in case of error
3247  */
3248 static int
xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr def)3249 xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt, xmlRelaxNGDefinePtr def)
3250 {
3251     int ret = 0;
3252     xmlRelaxNGDefinePtr list;
3253 
3254     if ((ctxt == NULL) || (def == NULL))
3255         return (-1);
3256 
3257     if ((def->type == XML_RELAXNG_START) ||
3258         (def->type == XML_RELAXNG_ELEMENT)) {
3259         ret = xmlRelaxNGIsCompileable(def);
3260         if ((def->dflags & IS_COMPILABLE) && (def->depth != -25)) {
3261             ctxt->am = NULL;
3262             ret = xmlRelaxNGCompile(ctxt, def);
3263 #ifdef DEBUG_PROGRESSIVE
3264             if (ret == 0) {
3265                 if (def->type == XML_RELAXNG_START)
3266                     xmlGenericError(xmlGenericErrorContext,
3267                                     "compiled the start\n");
3268                 else
3269                     xmlGenericError(xmlGenericErrorContext,
3270                                     "compiled element %s\n", def->name);
3271             } else {
3272                 if (def->type == XML_RELAXNG_START)
3273                     xmlGenericError(xmlGenericErrorContext,
3274                                     "failed to compile the start\n");
3275                 else
3276                     xmlGenericError(xmlGenericErrorContext,
3277                                     "failed to compile element %s\n",
3278                                     def->name);
3279             }
3280 #endif
3281             return (ret);
3282         }
3283     }
3284     switch (def->type) {
3285         case XML_RELAXNG_NOOP:
3286             ret = xmlRelaxNGTryCompile(ctxt, def->content);
3287             break;
3288         case XML_RELAXNG_TEXT:
3289         case XML_RELAXNG_DATATYPE:
3290         case XML_RELAXNG_LIST:
3291         case XML_RELAXNG_PARAM:
3292         case XML_RELAXNG_VALUE:
3293         case XML_RELAXNG_EMPTY:
3294         case XML_RELAXNG_ELEMENT:
3295             ret = 0;
3296             break;
3297         case XML_RELAXNG_OPTIONAL:
3298         case XML_RELAXNG_ZEROORMORE:
3299         case XML_RELAXNG_ONEORMORE:
3300         case XML_RELAXNG_CHOICE:
3301         case XML_RELAXNG_GROUP:
3302         case XML_RELAXNG_DEF:
3303         case XML_RELAXNG_START:
3304         case XML_RELAXNG_REF:
3305         case XML_RELAXNG_EXTERNALREF:
3306         case XML_RELAXNG_PARENTREF:
3307             list = def->content;
3308             while (list != NULL) {
3309                 ret = xmlRelaxNGTryCompile(ctxt, list);
3310                 if (ret != 0)
3311                     break;
3312                 list = list->next;
3313             }
3314             break;
3315         case XML_RELAXNG_EXCEPT:
3316         case XML_RELAXNG_ATTRIBUTE:
3317         case XML_RELAXNG_INTERLEAVE:
3318         case XML_RELAXNG_NOT_ALLOWED:
3319             ret = 0;
3320             break;
3321     }
3322     return (ret);
3323 }
3324 
3325 /************************************************************************
3326  *									*
3327  *			Parsing functions				*
3328  *									*
3329  ************************************************************************/
3330 
3331 static xmlRelaxNGDefinePtr xmlRelaxNGParseAttribute(xmlRelaxNGParserCtxtPtr
3332                                                     ctxt, xmlNodePtr node);
3333 static xmlRelaxNGDefinePtr xmlRelaxNGParseElement(xmlRelaxNGParserCtxtPtr
3334                                                   ctxt, xmlNodePtr node);
3335 static xmlRelaxNGDefinePtr xmlRelaxNGParsePatterns(xmlRelaxNGParserCtxtPtr
3336                                                    ctxt, xmlNodePtr nodes,
3337                                                    int group);
3338 static xmlRelaxNGDefinePtr xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr
3339                                                   ctxt, xmlNodePtr node);
3340 static xmlRelaxNGPtr xmlRelaxNGParseDocument(xmlRelaxNGParserCtxtPtr ctxt,
3341                                              xmlNodePtr node);
3342 static int xmlRelaxNGParseGrammarContent(xmlRelaxNGParserCtxtPtr ctxt,
3343                                          xmlNodePtr nodes);
3344 static xmlRelaxNGDefinePtr xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr
3345                                                     ctxt, xmlNodePtr node,
3346                                                     xmlRelaxNGDefinePtr
3347                                                     def);
3348 static xmlRelaxNGGrammarPtr xmlRelaxNGParseGrammar(xmlRelaxNGParserCtxtPtr
3349                                                    ctxt, xmlNodePtr nodes);
3350 static int xmlRelaxNGElementMatch(xmlRelaxNGValidCtxtPtr ctxt,
3351                                   xmlRelaxNGDefinePtr define,
3352                                   xmlNodePtr elem);
3353 
3354 
3355 #define IS_BLANK_NODE(n) (xmlRelaxNGIsBlank((n)->content))
3356 
3357 /**
3358  * xmlRelaxNGIsNullable:
3359  * @define:  the definition to verify
3360  *
3361  * Check if a definition is nullable.
3362  *
3363  * Returns 1 if yes, 0 if no and -1 in case of error
3364  */
3365 static int
xmlRelaxNGIsNullable(xmlRelaxNGDefinePtr define)3366 xmlRelaxNGIsNullable(xmlRelaxNGDefinePtr define)
3367 {
3368     int ret;
3369 
3370     if (define == NULL)
3371         return (-1);
3372 
3373     if (define->dflags & IS_NULLABLE)
3374         return (1);
3375     if (define->dflags & IS_NOT_NULLABLE)
3376         return (0);
3377     switch (define->type) {
3378         case XML_RELAXNG_EMPTY:
3379         case XML_RELAXNG_TEXT:
3380             ret = 1;
3381             break;
3382         case XML_RELAXNG_NOOP:
3383         case XML_RELAXNG_DEF:
3384         case XML_RELAXNG_REF:
3385         case XML_RELAXNG_EXTERNALREF:
3386         case XML_RELAXNG_PARENTREF:
3387         case XML_RELAXNG_ONEORMORE:
3388             ret = xmlRelaxNGIsNullable(define->content);
3389             break;
3390         case XML_RELAXNG_EXCEPT:
3391         case XML_RELAXNG_NOT_ALLOWED:
3392         case XML_RELAXNG_ELEMENT:
3393         case XML_RELAXNG_DATATYPE:
3394         case XML_RELAXNG_PARAM:
3395         case XML_RELAXNG_VALUE:
3396         case XML_RELAXNG_LIST:
3397         case XML_RELAXNG_ATTRIBUTE:
3398             ret = 0;
3399             break;
3400         case XML_RELAXNG_CHOICE:{
3401                 xmlRelaxNGDefinePtr list = define->content;
3402 
3403                 while (list != NULL) {
3404                     ret = xmlRelaxNGIsNullable(list);
3405                     if (ret != 0)
3406                         goto done;
3407                     list = list->next;
3408                 }
3409                 ret = 0;
3410                 break;
3411             }
3412         case XML_RELAXNG_START:
3413         case XML_RELAXNG_INTERLEAVE:
3414         case XML_RELAXNG_GROUP:{
3415                 xmlRelaxNGDefinePtr list = define->content;
3416 
3417                 while (list != NULL) {
3418                     ret = xmlRelaxNGIsNullable(list);
3419                     if (ret != 1)
3420                         goto done;
3421                     list = list->next;
3422                 }
3423                 return (1);
3424             }
3425         default:
3426             return (-1);
3427     }
3428   done:
3429     if (ret == 0)
3430         define->dflags |= IS_NOT_NULLABLE;
3431     if (ret == 1)
3432         define->dflags |= IS_NULLABLE;
3433     return (ret);
3434 }
3435 
3436 /**
3437  * xmlRelaxNGIsBlank:
3438  * @str:  a string
3439  *
3440  * Check if a string is ignorable c.f. 4.2. Whitespace
3441  *
3442  * Returns 1 if the string is NULL or made of blanks chars, 0 otherwise
3443  */
3444 static int
xmlRelaxNGIsBlank(xmlChar * str)3445 xmlRelaxNGIsBlank(xmlChar * str)
3446 {
3447     if (str == NULL)
3448         return (1);
3449     while (*str != 0) {
3450         if (!(IS_BLANK_CH(*str)))
3451             return (0);
3452         str++;
3453     }
3454     return (1);
3455 }
3456 
3457 /**
3458  * xmlRelaxNGGetDataTypeLibrary:
3459  * @ctxt:  a Relax-NG parser context
3460  * @node:  the current data or value element
3461  *
3462  * Applies algorithm from 4.3. datatypeLibrary attribute
3463  *
3464  * Returns the datatypeLibary value or NULL if not found
3465  */
3466 static xmlChar *
xmlRelaxNGGetDataTypeLibrary(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,xmlNodePtr node)3467 xmlRelaxNGGetDataTypeLibrary(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
3468                              xmlNodePtr node)
3469 {
3470     xmlChar *ret, *escape;
3471 
3472     if (node == NULL)
3473         return(NULL);
3474 
3475     if ((IS_RELAXNG(node, "data")) || (IS_RELAXNG(node, "value"))) {
3476         ret = xmlGetProp(node, BAD_CAST "datatypeLibrary");
3477         if (ret != NULL) {
3478             if (ret[0] == 0) {
3479                 xmlFree(ret);
3480                 return (NULL);
3481             }
3482             escape = xmlURIEscapeStr(ret, BAD_CAST ":/#?");
3483             if (escape == NULL) {
3484                 return (ret);
3485             }
3486             xmlFree(ret);
3487             return (escape);
3488         }
3489     }
3490     node = node->parent;
3491     while ((node != NULL) && (node->type == XML_ELEMENT_NODE)) {
3492         ret = xmlGetProp(node, BAD_CAST "datatypeLibrary");
3493         if (ret != NULL) {
3494             if (ret[0] == 0) {
3495                 xmlFree(ret);
3496                 return (NULL);
3497             }
3498             escape = xmlURIEscapeStr(ret, BAD_CAST ":/#?");
3499             if (escape == NULL) {
3500                 return (ret);
3501             }
3502             xmlFree(ret);
3503             return (escape);
3504         }
3505         node = node->parent;
3506     }
3507     return (NULL);
3508 }
3509 
3510 /**
3511  * xmlRelaxNGParseValue:
3512  * @ctxt:  a Relax-NG parser context
3513  * @node:  the data node.
3514  *
3515  * parse the content of a RelaxNG value node.
3516  *
3517  * Returns the definition pointer or NULL in case of error
3518  */
3519 static xmlRelaxNGDefinePtr
xmlRelaxNGParseValue(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)3520 xmlRelaxNGParseValue(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
3521 {
3522     xmlRelaxNGDefinePtr def = NULL;
3523     xmlRelaxNGTypeLibraryPtr lib = NULL;
3524     xmlChar *type;
3525     xmlChar *library;
3526     int success = 0;
3527 
3528     def = xmlRelaxNGNewDefine(ctxt, node);
3529     if (def == NULL)
3530         return (NULL);
3531     def->type = XML_RELAXNG_VALUE;
3532 
3533     type = xmlGetProp(node, BAD_CAST "type");
3534     if (type != NULL) {
3535         xmlRelaxNGNormExtSpace(type);
3536         if (xmlValidateNCName(type, 0)) {
3537             xmlRngPErr(ctxt, node, XML_RNGP_TYPE_VALUE,
3538                        "value type '%s' is not an NCName\n", type, NULL);
3539         }
3540         library = xmlRelaxNGGetDataTypeLibrary(ctxt, node);
3541         if (library == NULL)
3542             library =
3543                 xmlStrdup(BAD_CAST "http://relaxng.org/ns/structure/1.0");
3544 
3545         def->name = type;
3546         def->ns = library;
3547 
3548         lib = (xmlRelaxNGTypeLibraryPtr)
3549             xmlHashLookup(xmlRelaxNGRegisteredTypes, library);
3550         if (lib == NULL) {
3551             xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_TYPE_LIB,
3552                        "Use of unregistered type library '%s'\n", library,
3553                        NULL);
3554             def->data = NULL;
3555         } else {
3556             def->data = lib;
3557             if (lib->have == NULL) {
3558                 xmlRngPErr(ctxt, node, XML_RNGP_ERROR_TYPE_LIB,
3559                            "Internal error with type library '%s': no 'have'\n",
3560                            library, NULL);
3561             } else {
3562                 success = lib->have(lib->data, def->name);
3563                 if (success != 1) {
3564                     xmlRngPErr(ctxt, node, XML_RNGP_TYPE_NOT_FOUND,
3565                                "Error type '%s' is not exported by type library '%s'\n",
3566                                def->name, library);
3567                 }
3568             }
3569         }
3570     }
3571     if (node->children == NULL) {
3572         def->value = xmlStrdup(BAD_CAST "");
3573     } else if (((node->children->type != XML_TEXT_NODE) &&
3574                 (node->children->type != XML_CDATA_SECTION_NODE)) ||
3575                (node->children->next != NULL)) {
3576         xmlRngPErr(ctxt, node, XML_RNGP_TEXT_EXPECTED,
3577                    "Expecting a single text value for <value>content\n",
3578                    NULL, NULL);
3579     } else if (def != NULL) {
3580         def->value = xmlNodeGetContent(node);
3581         if (def->value == NULL) {
3582             xmlRngPErr(ctxt, node, XML_RNGP_VALUE_NO_CONTENT,
3583                        "Element <value> has no content\n", NULL, NULL);
3584         } else if ((lib != NULL) && (lib->check != NULL) && (success == 1)) {
3585             void *val = NULL;
3586 
3587             success =
3588                 lib->check(lib->data, def->name, def->value, &val, node);
3589             if (success != 1) {
3590                 xmlRngPErr(ctxt, node, XML_RNGP_INVALID_VALUE,
3591                            "Value '%s' is not acceptable for type '%s'\n",
3592                            def->value, def->name);
3593             } else {
3594                 if (val != NULL)
3595                     def->attrs = val;
3596             }
3597         }
3598     }
3599     return (def);
3600 }
3601 
3602 /**
3603  * xmlRelaxNGParseData:
3604  * @ctxt:  a Relax-NG parser context
3605  * @node:  the data node.
3606  *
3607  * parse the content of a RelaxNG data node.
3608  *
3609  * Returns the definition pointer or NULL in case of error
3610  */
3611 static xmlRelaxNGDefinePtr
xmlRelaxNGParseData(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)3612 xmlRelaxNGParseData(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
3613 {
3614     xmlRelaxNGDefinePtr def = NULL, except;
3615     xmlRelaxNGDefinePtr param, lastparam = NULL;
3616     xmlRelaxNGTypeLibraryPtr lib;
3617     xmlChar *type;
3618     xmlChar *library;
3619     xmlNodePtr content;
3620     int tmp;
3621 
3622     type = xmlGetProp(node, BAD_CAST "type");
3623     if (type == NULL) {
3624         xmlRngPErr(ctxt, node, XML_RNGP_TYPE_MISSING, "data has no type\n", NULL,
3625                    NULL);
3626         return (NULL);
3627     }
3628     xmlRelaxNGNormExtSpace(type);
3629     if (xmlValidateNCName(type, 0)) {
3630         xmlRngPErr(ctxt, node, XML_RNGP_TYPE_VALUE,
3631                    "data type '%s' is not an NCName\n", type, NULL);
3632     }
3633     library = xmlRelaxNGGetDataTypeLibrary(ctxt, node);
3634     if (library == NULL)
3635         library =
3636             xmlStrdup(BAD_CAST "http://relaxng.org/ns/structure/1.0");
3637 
3638     def = xmlRelaxNGNewDefine(ctxt, node);
3639     if (def == NULL) {
3640         xmlFree(type);
3641         return (NULL);
3642     }
3643     def->type = XML_RELAXNG_DATATYPE;
3644     def->name = type;
3645     def->ns = library;
3646 
3647     lib = (xmlRelaxNGTypeLibraryPtr)
3648         xmlHashLookup(xmlRelaxNGRegisteredTypes, library);
3649     if (lib == NULL) {
3650         xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_TYPE_LIB,
3651                    "Use of unregistered type library '%s'\n", library,
3652                    NULL);
3653         def->data = NULL;
3654     } else {
3655         def->data = lib;
3656         if (lib->have == NULL) {
3657             xmlRngPErr(ctxt, node, XML_RNGP_ERROR_TYPE_LIB,
3658                        "Internal error with type library '%s': no 'have'\n",
3659                        library, NULL);
3660         } else {
3661             tmp = lib->have(lib->data, def->name);
3662             if (tmp != 1) {
3663                 xmlRngPErr(ctxt, node, XML_RNGP_TYPE_NOT_FOUND,
3664                            "Error type '%s' is not exported by type library '%s'\n",
3665                            def->name, library);
3666             } else
3667                 if ((xmlStrEqual
3668                      (library,
3669                       BAD_CAST
3670                       "http://www.w3.org/2001/XMLSchema-datatypes"))
3671                     && ((xmlStrEqual(def->name, BAD_CAST "IDREF"))
3672                         || (xmlStrEqual(def->name, BAD_CAST "IDREFS")))) {
3673                 ctxt->idref = 1;
3674             }
3675         }
3676     }
3677     content = node->children;
3678 
3679     /*
3680      * Handle optional params
3681      */
3682     while (content != NULL) {
3683         if (!xmlStrEqual(content->name, BAD_CAST "param"))
3684             break;
3685         if (xmlStrEqual(library,
3686                         BAD_CAST "http://relaxng.org/ns/structure/1.0")) {
3687             xmlRngPErr(ctxt, node, XML_RNGP_PARAM_FORBIDDEN,
3688                        "Type library '%s' does not allow type parameters\n",
3689                        library, NULL);
3690             content = content->next;
3691             while ((content != NULL) &&
3692                    (xmlStrEqual(content->name, BAD_CAST "param")))
3693                 content = content->next;
3694         } else {
3695             param = xmlRelaxNGNewDefine(ctxt, node);
3696             if (param != NULL) {
3697                 param->type = XML_RELAXNG_PARAM;
3698                 param->name = xmlGetProp(content, BAD_CAST "name");
3699                 if (param->name == NULL) {
3700                     xmlRngPErr(ctxt, node, XML_RNGP_PARAM_NAME_MISSING,
3701                                "param has no name\n", NULL, NULL);
3702                 }
3703                 param->value = xmlNodeGetContent(content);
3704                 if (lastparam == NULL) {
3705                     def->attrs = lastparam = param;
3706                 } else {
3707                     lastparam->next = param;
3708                     lastparam = param;
3709                 }
3710                 if (lib != NULL) {
3711                 }
3712             }
3713             content = content->next;
3714         }
3715     }
3716     /*
3717      * Handle optional except
3718      */
3719     if ((content != NULL)
3720         && (xmlStrEqual(content->name, BAD_CAST "except"))) {
3721         xmlNodePtr child;
3722         xmlRelaxNGDefinePtr tmp2, last = NULL;
3723 
3724         except = xmlRelaxNGNewDefine(ctxt, node);
3725         if (except == NULL) {
3726             return (def);
3727         }
3728         except->type = XML_RELAXNG_EXCEPT;
3729         child = content->children;
3730 	def->content = except;
3731         if (child == NULL) {
3732             xmlRngPErr(ctxt, content, XML_RNGP_EXCEPT_NO_CONTENT,
3733                        "except has no content\n", NULL, NULL);
3734         }
3735         while (child != NULL) {
3736             tmp2 = xmlRelaxNGParsePattern(ctxt, child);
3737             if (tmp2 != NULL) {
3738                 if (last == NULL) {
3739                     except->content = last = tmp2;
3740                 } else {
3741                     last->next = tmp2;
3742                     last = tmp2;
3743                 }
3744             }
3745             child = child->next;
3746         }
3747         content = content->next;
3748     }
3749     /*
3750      * Check there is no unhandled data
3751      */
3752     if (content != NULL) {
3753         xmlRngPErr(ctxt, content, XML_RNGP_DATA_CONTENT,
3754                    "Element data has unexpected content %s\n",
3755                    content->name, NULL);
3756     }
3757 
3758     return (def);
3759 }
3760 
3761 static const xmlChar *invalidName = BAD_CAST "\1";
3762 
3763 /**
3764  * xmlRelaxNGCompareNameClasses:
3765  * @defs1:  the first element/attribute defs
3766  * @defs2:  the second element/attribute defs
3767  * @name:  the restriction on the name
3768  * @ns:  the restriction on the namespace
3769  *
3770  * Compare the 2 lists of element definitions. The comparison is
3771  * that if both lists do not accept the same QNames, it returns 1
3772  * If the 2 lists can accept the same QName the comparison returns 0
3773  *
3774  * Returns 1 disttinct, 0 if equal
3775  */
3776 static int
xmlRelaxNGCompareNameClasses(xmlRelaxNGDefinePtr def1,xmlRelaxNGDefinePtr def2)3777 xmlRelaxNGCompareNameClasses(xmlRelaxNGDefinePtr def1,
3778                              xmlRelaxNGDefinePtr def2)
3779 {
3780     int ret = 1;
3781     xmlNode node;
3782     xmlNs ns;
3783     xmlRelaxNGValidCtxt ctxt;
3784 
3785     memset(&ctxt, 0, sizeof(xmlRelaxNGValidCtxt));
3786 
3787     ctxt.flags = FLAGS_IGNORABLE | FLAGS_NOERROR;
3788 
3789     if ((def1->type == XML_RELAXNG_ELEMENT) ||
3790         (def1->type == XML_RELAXNG_ATTRIBUTE)) {
3791         if (def2->type == XML_RELAXNG_TEXT)
3792             return (1);
3793         if (def1->name != NULL) {
3794             node.name = def1->name;
3795         } else {
3796             node.name = invalidName;
3797         }
3798         if (def1->ns != NULL) {
3799             if (def1->ns[0] == 0) {
3800                 node.ns = NULL;
3801             } else {
3802 	        node.ns = &ns;
3803                 ns.href = def1->ns;
3804             }
3805         } else {
3806             node.ns = NULL;
3807         }
3808         if (xmlRelaxNGElementMatch(&ctxt, def2, &node)) {
3809             if (def1->nameClass != NULL) {
3810                 ret = xmlRelaxNGCompareNameClasses(def1->nameClass, def2);
3811             } else {
3812                 ret = 0;
3813             }
3814         } else {
3815             ret = 1;
3816         }
3817     } else if (def1->type == XML_RELAXNG_TEXT) {
3818         if (def2->type == XML_RELAXNG_TEXT)
3819             return (0);
3820         return (1);
3821     } else if (def1->type == XML_RELAXNG_EXCEPT) {
3822         TODO ret = 0;
3823     } else {
3824         TODO ret = 0;
3825     }
3826     if (ret == 0)
3827         return (ret);
3828     if ((def2->type == XML_RELAXNG_ELEMENT) ||
3829         (def2->type == XML_RELAXNG_ATTRIBUTE)) {
3830         if (def2->name != NULL) {
3831             node.name = def2->name;
3832         } else {
3833             node.name = invalidName;
3834         }
3835         node.ns = &ns;
3836         if (def2->ns != NULL) {
3837             if (def2->ns[0] == 0) {
3838                 node.ns = NULL;
3839             } else {
3840                 ns.href = def2->ns;
3841             }
3842         } else {
3843             ns.href = invalidName;
3844         }
3845         if (xmlRelaxNGElementMatch(&ctxt, def1, &node)) {
3846             if (def2->nameClass != NULL) {
3847                 ret = xmlRelaxNGCompareNameClasses(def2->nameClass, def1);
3848             } else {
3849                 ret = 0;
3850             }
3851         } else {
3852             ret = 1;
3853         }
3854     } else {
3855         TODO ret = 0;
3856     }
3857 
3858     return (ret);
3859 }
3860 
3861 /**
3862  * xmlRelaxNGCompareElemDefLists:
3863  * @ctxt:  a Relax-NG parser context
3864  * @defs1:  the first list of element/attribute defs
3865  * @defs2:  the second list of element/attribute defs
3866  *
3867  * Compare the 2 lists of element or attribute definitions. The comparison
3868  * is that if both lists do not accept the same QNames, it returns 1
3869  * If the 2 lists can accept the same QName the comparison returns 0
3870  *
3871  * Returns 1 disttinct, 0 if equal
3872  */
3873 static int
xmlRelaxNGCompareElemDefLists(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,xmlRelaxNGDefinePtr * def1,xmlRelaxNGDefinePtr * def2)3874 xmlRelaxNGCompareElemDefLists(xmlRelaxNGParserCtxtPtr ctxt
3875                               ATTRIBUTE_UNUSED, xmlRelaxNGDefinePtr * def1,
3876                               xmlRelaxNGDefinePtr * def2)
3877 {
3878     xmlRelaxNGDefinePtr *basedef2 = def2;
3879 
3880     if ((def1 == NULL) || (def2 == NULL))
3881         return (1);
3882     if ((*def1 == NULL) || (*def2 == NULL))
3883         return (1);
3884     while (*def1 != NULL) {
3885         while ((*def2) != NULL) {
3886             if (xmlRelaxNGCompareNameClasses(*def1, *def2) == 0)
3887                 return (0);
3888             def2++;
3889         }
3890         def2 = basedef2;
3891         def1++;
3892     }
3893     return (1);
3894 }
3895 
3896 /**
3897  * xmlRelaxNGGenerateAttributes:
3898  * @ctxt:  a Relax-NG parser context
3899  * @def:  the definition definition
3900  *
3901  * Check if the definition can only generate attributes
3902  *
3903  * Returns 1 if yes, 0 if no and -1 in case of error.
3904  */
3905 static int
xmlRelaxNGGenerateAttributes(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr def)3906 xmlRelaxNGGenerateAttributes(xmlRelaxNGParserCtxtPtr ctxt,
3907                              xmlRelaxNGDefinePtr def)
3908 {
3909     xmlRelaxNGDefinePtr parent, cur, tmp;
3910 
3911     /*
3912      * Don't run that check in case of error. Infinite recursion
3913      * becomes possible.
3914      */
3915     if (ctxt->nbErrors != 0)
3916         return (-1);
3917 
3918     parent = NULL;
3919     cur = def;
3920     while (cur != NULL) {
3921         if ((cur->type == XML_RELAXNG_ELEMENT) ||
3922             (cur->type == XML_RELAXNG_TEXT) ||
3923             (cur->type == XML_RELAXNG_DATATYPE) ||
3924             (cur->type == XML_RELAXNG_PARAM) ||
3925             (cur->type == XML_RELAXNG_LIST) ||
3926             (cur->type == XML_RELAXNG_VALUE) ||
3927             (cur->type == XML_RELAXNG_EMPTY))
3928             return (0);
3929         if ((cur->type == XML_RELAXNG_CHOICE) ||
3930             (cur->type == XML_RELAXNG_INTERLEAVE) ||
3931             (cur->type == XML_RELAXNG_GROUP) ||
3932             (cur->type == XML_RELAXNG_ONEORMORE) ||
3933             (cur->type == XML_RELAXNG_ZEROORMORE) ||
3934             (cur->type == XML_RELAXNG_OPTIONAL) ||
3935             (cur->type == XML_RELAXNG_PARENTREF) ||
3936             (cur->type == XML_RELAXNG_EXTERNALREF) ||
3937             (cur->type == XML_RELAXNG_REF) ||
3938             (cur->type == XML_RELAXNG_DEF)) {
3939             if (cur->content != NULL) {
3940                 parent = cur;
3941                 cur = cur->content;
3942                 tmp = cur;
3943                 while (tmp != NULL) {
3944                     tmp->parent = parent;
3945                     tmp = tmp->next;
3946                 }
3947                 continue;
3948             }
3949         }
3950         if (cur == def)
3951             break;
3952         if (cur->next != NULL) {
3953             cur = cur->next;
3954             continue;
3955         }
3956         do {
3957             cur = cur->parent;
3958             if (cur == NULL)
3959                 break;
3960             if (cur == def)
3961                 return (1);
3962             if (cur->next != NULL) {
3963                 cur = cur->next;
3964                 break;
3965             }
3966         } while (cur != NULL);
3967     }
3968     return (1);
3969 }
3970 
3971 /**
3972  * xmlRelaxNGGetElements:
3973  * @ctxt:  a Relax-NG parser context
3974  * @def:  the definition definition
3975  * @eora:  gather elements (0) or attributes (1)
3976  *
3977  * Compute the list of top elements a definition can generate
3978  *
3979  * Returns a list of elements or NULL if none was found.
3980  */
3981 static xmlRelaxNGDefinePtr *
xmlRelaxNGGetElements(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr def,int eora)3982 xmlRelaxNGGetElements(xmlRelaxNGParserCtxtPtr ctxt,
3983                       xmlRelaxNGDefinePtr def, int eora)
3984 {
3985     xmlRelaxNGDefinePtr *ret = NULL, parent, cur, tmp;
3986     int len = 0;
3987     int max = 0;
3988 
3989     /*
3990      * Don't run that check in case of error. Infinite recursion
3991      * becomes possible.
3992      */
3993     if (ctxt->nbErrors != 0)
3994         return (NULL);
3995 
3996     parent = NULL;
3997     cur = def;
3998     while (cur != NULL) {
3999         if (((eora == 0) && ((cur->type == XML_RELAXNG_ELEMENT) ||
4000                              (cur->type == XML_RELAXNG_TEXT))) ||
4001             ((eora == 1) && (cur->type == XML_RELAXNG_ATTRIBUTE))) {
4002             if (ret == NULL) {
4003                 max = 10;
4004                 ret = (xmlRelaxNGDefinePtr *)
4005                     xmlMalloc((max + 1) * sizeof(xmlRelaxNGDefinePtr));
4006                 if (ret == NULL) {
4007                     xmlRngPErrMemory(ctxt, "getting element list\n");
4008                     return (NULL);
4009                 }
4010             } else if (max <= len) {
4011 	        xmlRelaxNGDefinePtr *temp;
4012 
4013                 max *= 2;
4014                 temp = xmlRealloc(ret,
4015                                (max + 1) * sizeof(xmlRelaxNGDefinePtr));
4016                 if (temp == NULL) {
4017                     xmlRngPErrMemory(ctxt, "getting element list\n");
4018 		    xmlFree(ret);
4019                     return (NULL);
4020                 }
4021 		ret = temp;
4022             }
4023             ret[len++] = cur;
4024             ret[len] = NULL;
4025         } else if ((cur->type == XML_RELAXNG_CHOICE) ||
4026                    (cur->type == XML_RELAXNG_INTERLEAVE) ||
4027                    (cur->type == XML_RELAXNG_GROUP) ||
4028                    (cur->type == XML_RELAXNG_ONEORMORE) ||
4029                    (cur->type == XML_RELAXNG_ZEROORMORE) ||
4030                    (cur->type == XML_RELAXNG_OPTIONAL) ||
4031                    (cur->type == XML_RELAXNG_PARENTREF) ||
4032                    (cur->type == XML_RELAXNG_REF) ||
4033                    (cur->type == XML_RELAXNG_DEF) ||
4034 		   (cur->type == XML_RELAXNG_EXTERNALREF)) {
4035             /*
4036              * Don't go within elements or attributes or string values.
4037              * Just gather the element top list
4038              */
4039             if (cur->content != NULL) {
4040                 parent = cur;
4041                 cur = cur->content;
4042                 tmp = cur;
4043                 while (tmp != NULL) {
4044                     tmp->parent = parent;
4045                     tmp = tmp->next;
4046                 }
4047                 continue;
4048             }
4049         }
4050         if (cur == def)
4051             break;
4052         if (cur->next != NULL) {
4053             cur = cur->next;
4054             continue;
4055         }
4056         do {
4057             cur = cur->parent;
4058             if (cur == NULL)
4059                 break;
4060             if (cur == def)
4061                 return (ret);
4062             if (cur->next != NULL) {
4063                 cur = cur->next;
4064                 break;
4065             }
4066         } while (cur != NULL);
4067     }
4068     return (ret);
4069 }
4070 
4071 /**
4072  * xmlRelaxNGCheckChoiceDeterminism:
4073  * @ctxt:  a Relax-NG parser context
4074  * @def:  the choice definition
4075  *
4076  * Also used to find indeterministic pattern in choice
4077  */
4078 static void
xmlRelaxNGCheckChoiceDeterminism(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr def)4079 xmlRelaxNGCheckChoiceDeterminism(xmlRelaxNGParserCtxtPtr ctxt,
4080                                  xmlRelaxNGDefinePtr def)
4081 {
4082     xmlRelaxNGDefinePtr **list;
4083     xmlRelaxNGDefinePtr cur;
4084     int nbchild = 0, i, j, ret;
4085     int is_nullable = 0;
4086     int is_indeterminist = 0;
4087     xmlHashTablePtr triage = NULL;
4088     int is_triable = 1;
4089 
4090     if ((def == NULL) || (def->type != XML_RELAXNG_CHOICE))
4091         return;
4092 
4093     if (def->dflags & IS_PROCESSED)
4094         return;
4095 
4096     /*
4097      * Don't run that check in case of error. Infinite recursion
4098      * becomes possible.
4099      */
4100     if (ctxt->nbErrors != 0)
4101         return;
4102 
4103     is_nullable = xmlRelaxNGIsNullable(def);
4104 
4105     cur = def->content;
4106     while (cur != NULL) {
4107         nbchild++;
4108         cur = cur->next;
4109     }
4110 
4111     list = (xmlRelaxNGDefinePtr **) xmlMalloc(nbchild *
4112                                               sizeof(xmlRelaxNGDefinePtr
4113                                                      *));
4114     if (list == NULL) {
4115         xmlRngPErrMemory(ctxt, "building choice\n");
4116         return;
4117     }
4118     i = 0;
4119     /*
4120      * a bit strong but safe
4121      */
4122     if (is_nullable == 0) {
4123         triage = xmlHashCreate(10);
4124     } else {
4125         is_triable = 0;
4126     }
4127     cur = def->content;
4128     while (cur != NULL) {
4129         list[i] = xmlRelaxNGGetElements(ctxt, cur, 0);
4130         if ((list[i] == NULL) || (list[i][0] == NULL)) {
4131             is_triable = 0;
4132         } else if (is_triable == 1) {
4133             xmlRelaxNGDefinePtr *tmp;
4134             int res;
4135 
4136             tmp = list[i];
4137             while ((*tmp != NULL) && (is_triable == 1)) {
4138                 if ((*tmp)->type == XML_RELAXNG_TEXT) {
4139                     res = xmlHashAddEntry2(triage,
4140                                            BAD_CAST "#text", NULL,
4141                                            (void *) cur);
4142                     if (res != 0)
4143                         is_triable = -1;
4144                 } else if (((*tmp)->type == XML_RELAXNG_ELEMENT) &&
4145                            ((*tmp)->name != NULL)) {
4146                     if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
4147                         res = xmlHashAddEntry2(triage,
4148                                                (*tmp)->name, NULL,
4149                                                (void *) cur);
4150                     else
4151                         res = xmlHashAddEntry2(triage,
4152                                                (*tmp)->name, (*tmp)->ns,
4153                                                (void *) cur);
4154                     if (res != 0)
4155                         is_triable = -1;
4156                 } else if ((*tmp)->type == XML_RELAXNG_ELEMENT) {
4157                     if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
4158                         res = xmlHashAddEntry2(triage,
4159                                                BAD_CAST "#any", NULL,
4160                                                (void *) cur);
4161                     else
4162                         res = xmlHashAddEntry2(triage,
4163                                                BAD_CAST "#any", (*tmp)->ns,
4164                                                (void *) cur);
4165                     if (res != 0)
4166                         is_triable = -1;
4167                 } else {
4168                     is_triable = -1;
4169                 }
4170                 tmp++;
4171             }
4172         }
4173         i++;
4174         cur = cur->next;
4175     }
4176 
4177     for (i = 0; i < nbchild; i++) {
4178         if (list[i] == NULL)
4179             continue;
4180         for (j = 0; j < i; j++) {
4181             if (list[j] == NULL)
4182                 continue;
4183             ret = xmlRelaxNGCompareElemDefLists(ctxt, list[i], list[j]);
4184             if (ret == 0) {
4185                 is_indeterminist = 1;
4186             }
4187         }
4188     }
4189     for (i = 0; i < nbchild; i++) {
4190         if (list[i] != NULL)
4191             xmlFree(list[i]);
4192     }
4193 
4194     xmlFree(list);
4195     if (is_indeterminist) {
4196         def->dflags |= IS_INDETERMINIST;
4197     }
4198     if (is_triable == 1) {
4199         def->dflags |= IS_TRIABLE;
4200         def->data = triage;
4201     } else if (triage != NULL) {
4202         xmlHashFree(triage, NULL);
4203     }
4204     def->dflags |= IS_PROCESSED;
4205 }
4206 
4207 /**
4208  * xmlRelaxNGCheckGroupAttrs:
4209  * @ctxt:  a Relax-NG parser context
4210  * @def:  the group definition
4211  *
4212  * Detects violations of rule 7.3
4213  */
4214 static void
xmlRelaxNGCheckGroupAttrs(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr def)4215 xmlRelaxNGCheckGroupAttrs(xmlRelaxNGParserCtxtPtr ctxt,
4216                           xmlRelaxNGDefinePtr def)
4217 {
4218     xmlRelaxNGDefinePtr **list;
4219     xmlRelaxNGDefinePtr cur;
4220     int nbchild = 0, i, j, ret;
4221 
4222     if ((def == NULL) ||
4223         ((def->type != XML_RELAXNG_GROUP) &&
4224          (def->type != XML_RELAXNG_ELEMENT)))
4225         return;
4226 
4227     if (def->dflags & IS_PROCESSED)
4228         return;
4229 
4230     /*
4231      * Don't run that check in case of error. Infinite recursion
4232      * becomes possible.
4233      */
4234     if (ctxt->nbErrors != 0)
4235         return;
4236 
4237     cur = def->attrs;
4238     while (cur != NULL) {
4239         nbchild++;
4240         cur = cur->next;
4241     }
4242     cur = def->content;
4243     while (cur != NULL) {
4244         nbchild++;
4245         cur = cur->next;
4246     }
4247 
4248     list = (xmlRelaxNGDefinePtr **) xmlMalloc(nbchild *
4249                                               sizeof(xmlRelaxNGDefinePtr
4250                                                      *));
4251     if (list == NULL) {
4252         xmlRngPErrMemory(ctxt, "building group\n");
4253         return;
4254     }
4255     i = 0;
4256     cur = def->attrs;
4257     while (cur != NULL) {
4258         list[i] = xmlRelaxNGGetElements(ctxt, cur, 1);
4259         i++;
4260         cur = cur->next;
4261     }
4262     cur = def->content;
4263     while (cur != NULL) {
4264         list[i] = xmlRelaxNGGetElements(ctxt, cur, 1);
4265         i++;
4266         cur = cur->next;
4267     }
4268 
4269     for (i = 0; i < nbchild; i++) {
4270         if (list[i] == NULL)
4271             continue;
4272         for (j = 0; j < i; j++) {
4273             if (list[j] == NULL)
4274                 continue;
4275             ret = xmlRelaxNGCompareElemDefLists(ctxt, list[i], list[j]);
4276             if (ret == 0) {
4277                 xmlRngPErr(ctxt, def->node, XML_RNGP_GROUP_ATTR_CONFLICT,
4278                            "Attributes conflicts in group\n", NULL, NULL);
4279             }
4280         }
4281     }
4282     for (i = 0; i < nbchild; i++) {
4283         if (list[i] != NULL)
4284             xmlFree(list[i]);
4285     }
4286 
4287     xmlFree(list);
4288     def->dflags |= IS_PROCESSED;
4289 }
4290 
4291 /**
4292  * xmlRelaxNGComputeInterleaves:
4293  * @def:  the interleave definition
4294  * @ctxt:  a Relax-NG parser context
4295  * @name:  the definition name
4296  *
4297  * A lot of work for preprocessing interleave definitions
4298  * is potentially needed to get a decent execution speed at runtime
4299  *   - trying to get a total order on the element nodes generated
4300  *     by the interleaves, order the list of interleave definitions
4301  *     following that order.
4302  *   - if <text/> is used to handle mixed content, it is better to
4303  *     flag this in the define and simplify the runtime checking
4304  *     algorithm
4305  */
4306 static void
xmlRelaxNGComputeInterleaves(xmlRelaxNGDefinePtr def,xmlRelaxNGParserCtxtPtr ctxt,xmlChar * name ATTRIBUTE_UNUSED)4307 xmlRelaxNGComputeInterleaves(xmlRelaxNGDefinePtr def,
4308                              xmlRelaxNGParserCtxtPtr ctxt,
4309                              xmlChar * name ATTRIBUTE_UNUSED)
4310 {
4311     xmlRelaxNGDefinePtr cur, *tmp;
4312 
4313     xmlRelaxNGPartitionPtr partitions = NULL;
4314     xmlRelaxNGInterleaveGroupPtr *groups = NULL;
4315     xmlRelaxNGInterleaveGroupPtr group;
4316     int i, j, ret, res;
4317     int nbgroups = 0;
4318     int nbchild = 0;
4319     int is_mixed = 0;
4320     int is_determinist = 1;
4321 
4322     /*
4323      * Don't run that check in case of error. Infinite recursion
4324      * becomes possible.
4325      */
4326     if (ctxt->nbErrors != 0)
4327         return;
4328 
4329 #ifdef DEBUG_INTERLEAVE
4330     xmlGenericError(xmlGenericErrorContext,
4331                     "xmlRelaxNGComputeInterleaves(%s)\n", name);
4332 #endif
4333     cur = def->content;
4334     while (cur != NULL) {
4335         nbchild++;
4336         cur = cur->next;
4337     }
4338 
4339 #ifdef DEBUG_INTERLEAVE
4340     xmlGenericError(xmlGenericErrorContext, "  %d child\n", nbchild);
4341 #endif
4342     groups = (xmlRelaxNGInterleaveGroupPtr *)
4343         xmlMalloc(nbchild * sizeof(xmlRelaxNGInterleaveGroupPtr));
4344     if (groups == NULL)
4345         goto error;
4346     cur = def->content;
4347     while (cur != NULL) {
4348         groups[nbgroups] = (xmlRelaxNGInterleaveGroupPtr)
4349             xmlMalloc(sizeof(xmlRelaxNGInterleaveGroup));
4350         if (groups[nbgroups] == NULL)
4351             goto error;
4352         if (cur->type == XML_RELAXNG_TEXT)
4353             is_mixed++;
4354         groups[nbgroups]->rule = cur;
4355         groups[nbgroups]->defs = xmlRelaxNGGetElements(ctxt, cur, 0);
4356         groups[nbgroups]->attrs = xmlRelaxNGGetElements(ctxt, cur, 1);
4357         nbgroups++;
4358         cur = cur->next;
4359     }
4360 #ifdef DEBUG_INTERLEAVE
4361     xmlGenericError(xmlGenericErrorContext, "  %d groups\n", nbgroups);
4362 #endif
4363 
4364     /*
4365      * Let's check that all rules makes a partitions according to 7.4
4366      */
4367     partitions = (xmlRelaxNGPartitionPtr)
4368         xmlMalloc(sizeof(xmlRelaxNGPartition));
4369     if (partitions == NULL)
4370         goto error;
4371     memset(partitions, 0, sizeof(xmlRelaxNGPartition));
4372     partitions->nbgroups = nbgroups;
4373     partitions->triage = xmlHashCreate(nbgroups);
4374     for (i = 0; i < nbgroups; i++) {
4375         group = groups[i];
4376         for (j = i + 1; j < nbgroups; j++) {
4377             if (groups[j] == NULL)
4378                 continue;
4379 
4380             ret = xmlRelaxNGCompareElemDefLists(ctxt, group->defs,
4381                                                 groups[j]->defs);
4382             if (ret == 0) {
4383                 xmlRngPErr(ctxt, def->node, XML_RNGP_ELEM_TEXT_CONFLICT,
4384                            "Element or text conflicts in interleave\n",
4385                            NULL, NULL);
4386             }
4387             ret = xmlRelaxNGCompareElemDefLists(ctxt, group->attrs,
4388                                                 groups[j]->attrs);
4389             if (ret == 0) {
4390                 xmlRngPErr(ctxt, def->node, XML_RNGP_ATTR_CONFLICT,
4391                            "Attributes conflicts in interleave\n", NULL,
4392                            NULL);
4393             }
4394         }
4395         tmp = group->defs;
4396         if ((tmp != NULL) && (*tmp != NULL)) {
4397             while (*tmp != NULL) {
4398                 if ((*tmp)->type == XML_RELAXNG_TEXT) {
4399                     res = xmlHashAddEntry2(partitions->triage,
4400                                            BAD_CAST "#text", NULL,
4401                                            (void *) (long) (i + 1));
4402                     if (res != 0)
4403                         is_determinist = -1;
4404                 } else if (((*tmp)->type == XML_RELAXNG_ELEMENT) &&
4405                            ((*tmp)->name != NULL)) {
4406                     if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
4407                         res = xmlHashAddEntry2(partitions->triage,
4408                                                (*tmp)->name, NULL,
4409                                                (void *) (long) (i + 1));
4410                     else
4411                         res = xmlHashAddEntry2(partitions->triage,
4412                                                (*tmp)->name, (*tmp)->ns,
4413                                                (void *) (long) (i + 1));
4414                     if (res != 0)
4415                         is_determinist = -1;
4416                 } else if ((*tmp)->type == XML_RELAXNG_ELEMENT) {
4417                     if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
4418                         res = xmlHashAddEntry2(partitions->triage,
4419                                                BAD_CAST "#any", NULL,
4420                                                (void *) (long) (i + 1));
4421                     else
4422                         res = xmlHashAddEntry2(partitions->triage,
4423                                                BAD_CAST "#any", (*tmp)->ns,
4424                                                (void *) (long) (i + 1));
4425                     if ((*tmp)->nameClass != NULL)
4426                         is_determinist = 2;
4427                     if (res != 0)
4428                         is_determinist = -1;
4429                 } else {
4430                     is_determinist = -1;
4431                 }
4432                 tmp++;
4433             }
4434         } else {
4435             is_determinist = 0;
4436         }
4437     }
4438     partitions->groups = groups;
4439 
4440     /*
4441      * and save the partition list back in the def
4442      */
4443     def->data = partitions;
4444     if (is_mixed != 0)
4445         def->dflags |= IS_MIXED;
4446     if (is_determinist == 1)
4447         partitions->flags = IS_DETERMINIST;
4448     if (is_determinist == 2)
4449         partitions->flags = IS_DETERMINIST | IS_NEEDCHECK;
4450     return;
4451 
4452   error:
4453     xmlRngPErrMemory(ctxt, "in interleave computation\n");
4454     if (groups != NULL) {
4455         for (i = 0; i < nbgroups; i++)
4456             if (groups[i] != NULL) {
4457                 if (groups[i]->defs != NULL)
4458                     xmlFree(groups[i]->defs);
4459                 xmlFree(groups[i]);
4460             }
4461         xmlFree(groups);
4462     }
4463     xmlRelaxNGFreePartition(partitions);
4464 }
4465 
4466 /**
4467  * xmlRelaxNGParseInterleave:
4468  * @ctxt:  a Relax-NG parser context
4469  * @node:  the data node.
4470  *
4471  * parse the content of a RelaxNG interleave node.
4472  *
4473  * Returns the definition pointer or NULL in case of error
4474  */
4475 static xmlRelaxNGDefinePtr
xmlRelaxNGParseInterleave(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)4476 xmlRelaxNGParseInterleave(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
4477 {
4478     xmlRelaxNGDefinePtr def = NULL;
4479     xmlRelaxNGDefinePtr last = NULL, cur;
4480     xmlNodePtr child;
4481 
4482     def = xmlRelaxNGNewDefine(ctxt, node);
4483     if (def == NULL) {
4484         return (NULL);
4485     }
4486     def->type = XML_RELAXNG_INTERLEAVE;
4487 
4488     if (ctxt->interleaves == NULL)
4489         ctxt->interleaves = xmlHashCreate(10);
4490     if (ctxt->interleaves == NULL) {
4491         xmlRngPErrMemory(ctxt, "create interleaves\n");
4492     } else {
4493         char name[32];
4494 
4495         snprintf(name, 32, "interleave%d", ctxt->nbInterleaves++);
4496         if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST name, def) < 0) {
4497             xmlRngPErr(ctxt, node, XML_RNGP_INTERLEAVE_ADD,
4498                        "Failed to add %s to hash table\n",
4499 		       (const xmlChar *) name, NULL);
4500         }
4501     }
4502     child = node->children;
4503     if (child == NULL) {
4504         xmlRngPErr(ctxt, node, XML_RNGP_INTERLEAVE_NO_CONTENT,
4505                    "Element interleave is empty\n", NULL, NULL);
4506     }
4507     while (child != NULL) {
4508         if (IS_RELAXNG(child, "element")) {
4509             cur = xmlRelaxNGParseElement(ctxt, child);
4510         } else {
4511             cur = xmlRelaxNGParsePattern(ctxt, child);
4512         }
4513         if (cur != NULL) {
4514             cur->parent = def;
4515             if (last == NULL) {
4516                 def->content = last = cur;
4517             } else {
4518                 last->next = cur;
4519                 last = cur;
4520             }
4521         }
4522         child = child->next;
4523     }
4524 
4525     return (def);
4526 }
4527 
4528 /**
4529  * xmlRelaxNGParseInclude:
4530  * @ctxt:  a Relax-NG parser context
4531  * @node:  the include node
4532  *
4533  * Integrate the content of an include node in the current grammar
4534  *
4535  * Returns 0 in case of success or -1 in case of error
4536  */
4537 static int
xmlRelaxNGParseInclude(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)4538 xmlRelaxNGParseInclude(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
4539 {
4540     xmlRelaxNGIncludePtr incl;
4541     xmlNodePtr root;
4542     int ret = 0, tmp;
4543 
4544     incl = node->psvi;
4545     if (incl == NULL) {
4546         xmlRngPErr(ctxt, node, XML_RNGP_INCLUDE_EMPTY,
4547                    "Include node has no data\n", NULL, NULL);
4548         return (-1);
4549     }
4550     root = xmlDocGetRootElement(incl->doc);
4551     if (root == NULL) {
4552         xmlRngPErr(ctxt, node, XML_RNGP_EMPTY, "Include document is empty\n",
4553                    NULL, NULL);
4554         return (-1);
4555     }
4556     if (!xmlStrEqual(root->name, BAD_CAST "grammar")) {
4557         xmlRngPErr(ctxt, node, XML_RNGP_GRAMMAR_MISSING,
4558                    "Include document root is not a grammar\n", NULL, NULL);
4559         return (-1);
4560     }
4561 
4562     /*
4563      * Merge the definition from both the include and the internal list
4564      */
4565     if (root->children != NULL) {
4566         tmp = xmlRelaxNGParseGrammarContent(ctxt, root->children);
4567         if (tmp != 0)
4568             ret = -1;
4569     }
4570     if (node->children != NULL) {
4571         tmp = xmlRelaxNGParseGrammarContent(ctxt, node->children);
4572         if (tmp != 0)
4573             ret = -1;
4574     }
4575     return (ret);
4576 }
4577 
4578 /**
4579  * xmlRelaxNGParseDefine:
4580  * @ctxt:  a Relax-NG parser context
4581  * @node:  the define node
4582  *
4583  * parse the content of a RelaxNG define element node.
4584  *
4585  * Returns 0 in case of success or -1 in case of error
4586  */
4587 static int
xmlRelaxNGParseDefine(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)4588 xmlRelaxNGParseDefine(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
4589 {
4590     xmlChar *name;
4591     int ret = 0, tmp;
4592     xmlRelaxNGDefinePtr def;
4593     const xmlChar *olddefine;
4594 
4595     name = xmlGetProp(node, BAD_CAST "name");
4596     if (name == NULL) {
4597         xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_NAME_MISSING,
4598                    "define has no name\n", NULL, NULL);
4599     } else {
4600         xmlRelaxNGNormExtSpace(name);
4601         if (xmlValidateNCName(name, 0)) {
4602             xmlRngPErr(ctxt, node, XML_RNGP_INVALID_DEFINE_NAME,
4603                        "define name '%s' is not an NCName\n", name, NULL);
4604         }
4605         def = xmlRelaxNGNewDefine(ctxt, node);
4606         if (def == NULL) {
4607             xmlFree(name);
4608             return (-1);
4609         }
4610         def->type = XML_RELAXNG_DEF;
4611         def->name = name;
4612         if (node->children == NULL) {
4613             xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_EMPTY,
4614                        "define has no children\n", NULL, NULL);
4615         } else {
4616             olddefine = ctxt->define;
4617             ctxt->define = name;
4618             def->content =
4619                 xmlRelaxNGParsePatterns(ctxt, node->children, 0);
4620             ctxt->define = olddefine;
4621         }
4622         if (ctxt->grammar->defs == NULL)
4623             ctxt->grammar->defs = xmlHashCreate(10);
4624         if (ctxt->grammar->defs == NULL) {
4625             xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_CREATE_FAILED,
4626                        "Could not create definition hash\n", NULL, NULL);
4627             ret = -1;
4628         } else {
4629             tmp = xmlHashAddEntry(ctxt->grammar->defs, name, def);
4630             if (tmp < 0) {
4631                 xmlRelaxNGDefinePtr prev;
4632 
4633                 prev = xmlHashLookup(ctxt->grammar->defs, name);
4634                 if (prev == NULL) {
4635                     xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_CREATE_FAILED,
4636                                "Internal error on define aggregation of %s\n",
4637                                name, NULL);
4638                     ret = -1;
4639                 } else {
4640                     while (prev->nextHash != NULL)
4641                         prev = prev->nextHash;
4642                     prev->nextHash = def;
4643                 }
4644             }
4645         }
4646     }
4647     return (ret);
4648 }
4649 
4650 /**
4651  * xmlRelaxNGParseImportRef:
4652  * @payload: the parser context
4653  * @data: the current grammar
4654  * @name: the reference name
4655  *
4656  * Import import one references into the current grammar
4657  */
4658 static void
xmlRelaxNGParseImportRef(void * payload,void * data,xmlChar * name)4659 xmlRelaxNGParseImportRef(void *payload, void *data, xmlChar *name) {
4660     xmlRelaxNGParserCtxtPtr ctxt = (xmlRelaxNGParserCtxtPtr) data;
4661     xmlRelaxNGDefinePtr def = (xmlRelaxNGDefinePtr) payload;
4662     int tmp;
4663 
4664     def->dflags |= IS_EXTERNAL_REF;
4665 
4666     tmp = xmlHashAddEntry(ctxt->grammar->refs, name, def);
4667     if (tmp < 0) {
4668         xmlRelaxNGDefinePtr prev;
4669 
4670         prev = (xmlRelaxNGDefinePtr)
4671             xmlHashLookup(ctxt->grammar->refs, def->name);
4672         if (prev == NULL) {
4673             if (def->name != NULL) {
4674                 xmlRngPErr(ctxt, NULL, XML_RNGP_REF_CREATE_FAILED,
4675                            "Error refs definitions '%s'\n",
4676                            def->name, NULL);
4677             } else {
4678                 xmlRngPErr(ctxt, NULL, XML_RNGP_REF_CREATE_FAILED,
4679                            "Error refs definitions\n",
4680                            NULL, NULL);
4681             }
4682         } else {
4683             def->nextHash = prev->nextHash;
4684             prev->nextHash = def;
4685         }
4686     }
4687 }
4688 
4689 /**
4690  * xmlRelaxNGParseImportRefs:
4691  * @ctxt: the parser context
4692  * @grammar: the sub grammar
4693  *
4694  * Import references from the subgrammar into the current grammar
4695  *
4696  * Returns 0 in case of success, -1 in case of failure
4697  */
4698 static int
xmlRelaxNGParseImportRefs(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGGrammarPtr grammar)4699 xmlRelaxNGParseImportRefs(xmlRelaxNGParserCtxtPtr ctxt,
4700                           xmlRelaxNGGrammarPtr grammar) {
4701     if ((ctxt == NULL) || (grammar == NULL) || (ctxt->grammar == NULL))
4702         return(-1);
4703     if (grammar->refs == NULL)
4704         return(0);
4705     if (ctxt->grammar->refs == NULL)
4706         ctxt->grammar->refs = xmlHashCreate(10);
4707     if (ctxt->grammar->refs == NULL) {
4708         xmlRngPErr(ctxt, NULL, XML_RNGP_REF_CREATE_FAILED,
4709                    "Could not create references hash\n", NULL, NULL);
4710         return(-1);
4711     }
4712     xmlHashScan(grammar->refs, xmlRelaxNGParseImportRef, ctxt);
4713     return(0);
4714 }
4715 
4716 /**
4717  * xmlRelaxNGProcessExternalRef:
4718  * @ctxt: the parser context
4719  * @node:  the externlRef node
4720  *
4721  * Process and compile an externlRef node
4722  *
4723  * Returns the xmlRelaxNGDefinePtr or NULL in case of error
4724  */
4725 static xmlRelaxNGDefinePtr
xmlRelaxNGProcessExternalRef(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)4726 xmlRelaxNGProcessExternalRef(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
4727 {
4728     xmlRelaxNGDocumentPtr docu;
4729     xmlNodePtr root, tmp;
4730     xmlChar *ns;
4731     int newNs = 0, oldflags;
4732     xmlRelaxNGDefinePtr def;
4733 
4734     docu = node->psvi;
4735     if (docu != NULL) {
4736         def = xmlRelaxNGNewDefine(ctxt, node);
4737         if (def == NULL)
4738             return (NULL);
4739         def->type = XML_RELAXNG_EXTERNALREF;
4740 
4741         if (docu->content == NULL) {
4742             /*
4743              * Then do the parsing for good
4744              */
4745             root = xmlDocGetRootElement(docu->doc);
4746             if (root == NULL) {
4747                 xmlRngPErr(ctxt, node, XML_RNGP_EXTERNALREF_EMTPY,
4748                            "xmlRelaxNGParse: %s is empty\n", ctxt->URL,
4749                            NULL);
4750                 return (NULL);
4751             }
4752             /*
4753              * ns transmission rules
4754              */
4755             ns = xmlGetProp(root, BAD_CAST "ns");
4756             if (ns == NULL) {
4757                 tmp = node;
4758                 while ((tmp != NULL) && (tmp->type == XML_ELEMENT_NODE)) {
4759                     ns = xmlGetProp(tmp, BAD_CAST "ns");
4760                     if (ns != NULL) {
4761                         break;
4762                     }
4763                     tmp = tmp->parent;
4764                 }
4765                 if (ns != NULL) {
4766                     xmlSetProp(root, BAD_CAST "ns", ns);
4767                     newNs = 1;
4768                     xmlFree(ns);
4769                 }
4770             } else {
4771                 xmlFree(ns);
4772             }
4773 
4774             /*
4775              * Parsing to get a precompiled schemas.
4776              */
4777             oldflags = ctxt->flags;
4778             ctxt->flags |= XML_RELAXNG_IN_EXTERNALREF;
4779             docu->schema = xmlRelaxNGParseDocument(ctxt, root);
4780             ctxt->flags = oldflags;
4781             if ((docu->schema != NULL) &&
4782                 (docu->schema->topgrammar != NULL)) {
4783                 docu->content = docu->schema->topgrammar->start;
4784                 if (docu->schema->topgrammar->refs)
4785                     xmlRelaxNGParseImportRefs(ctxt, docu->schema->topgrammar);
4786             }
4787 
4788             /*
4789              * the externalRef may be reused in a different ns context
4790              */
4791             if (newNs == 1) {
4792                 xmlUnsetProp(root, BAD_CAST "ns");
4793             }
4794         }
4795         def->content = docu->content;
4796     } else {
4797         def = NULL;
4798     }
4799     return (def);
4800 }
4801 
4802 /**
4803  * xmlRelaxNGParsePattern:
4804  * @ctxt:  a Relax-NG parser context
4805  * @node:  the pattern node.
4806  *
4807  * parse the content of a RelaxNG pattern node.
4808  *
4809  * Returns the definition pointer or NULL in case of error or if no
4810  *     pattern is generated.
4811  */
4812 static xmlRelaxNGDefinePtr
xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)4813 xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
4814 {
4815     xmlRelaxNGDefinePtr def = NULL;
4816 
4817     if (node == NULL) {
4818         return (NULL);
4819     }
4820     if (IS_RELAXNG(node, "element")) {
4821         def = xmlRelaxNGParseElement(ctxt, node);
4822     } else if (IS_RELAXNG(node, "attribute")) {
4823         def = xmlRelaxNGParseAttribute(ctxt, node);
4824     } else if (IS_RELAXNG(node, "empty")) {
4825         def = xmlRelaxNGNewDefine(ctxt, node);
4826         if (def == NULL)
4827             return (NULL);
4828         def->type = XML_RELAXNG_EMPTY;
4829         if (node->children != NULL) {
4830             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_NOT_EMPTY,
4831                        "empty: had a child node\n", NULL, NULL);
4832         }
4833     } else if (IS_RELAXNG(node, "text")) {
4834         def = xmlRelaxNGNewDefine(ctxt, node);
4835         if (def == NULL)
4836             return (NULL);
4837         def->type = XML_RELAXNG_TEXT;
4838         if (node->children != NULL) {
4839             xmlRngPErr(ctxt, node, XML_RNGP_TEXT_HAS_CHILD,
4840                        "text: had a child node\n", NULL, NULL);
4841         }
4842     } else if (IS_RELAXNG(node, "zeroOrMore")) {
4843         def = xmlRelaxNGNewDefine(ctxt, node);
4844         if (def == NULL)
4845             return (NULL);
4846         def->type = XML_RELAXNG_ZEROORMORE;
4847         if (node->children == NULL) {
4848             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
4849                        "Element %s is empty\n", node->name, NULL);
4850         } else {
4851             def->content =
4852                 xmlRelaxNGParsePatterns(ctxt, node->children, 1);
4853         }
4854     } else if (IS_RELAXNG(node, "oneOrMore")) {
4855         def = xmlRelaxNGNewDefine(ctxt, node);
4856         if (def == NULL)
4857             return (NULL);
4858         def->type = XML_RELAXNG_ONEORMORE;
4859         if (node->children == NULL) {
4860             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
4861                        "Element %s is empty\n", node->name, NULL);
4862         } else {
4863             def->content =
4864                 xmlRelaxNGParsePatterns(ctxt, node->children, 1);
4865         }
4866     } else if (IS_RELAXNG(node, "optional")) {
4867         def = xmlRelaxNGNewDefine(ctxt, node);
4868         if (def == NULL)
4869             return (NULL);
4870         def->type = XML_RELAXNG_OPTIONAL;
4871         if (node->children == NULL) {
4872             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
4873                        "Element %s is empty\n", node->name, NULL);
4874         } else {
4875             def->content =
4876                 xmlRelaxNGParsePatterns(ctxt, node->children, 1);
4877         }
4878     } else if (IS_RELAXNG(node, "choice")) {
4879         def = xmlRelaxNGNewDefine(ctxt, node);
4880         if (def == NULL)
4881             return (NULL);
4882         def->type = XML_RELAXNG_CHOICE;
4883         if (node->children == NULL) {
4884             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
4885                        "Element %s is empty\n", node->name, NULL);
4886         } else {
4887             def->content =
4888                 xmlRelaxNGParsePatterns(ctxt, node->children, 0);
4889         }
4890     } else if (IS_RELAXNG(node, "group")) {
4891         def = xmlRelaxNGNewDefine(ctxt, node);
4892         if (def == NULL)
4893             return (NULL);
4894         def->type = XML_RELAXNG_GROUP;
4895         if (node->children == NULL) {
4896             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
4897                        "Element %s is empty\n", node->name, NULL);
4898         } else {
4899             def->content =
4900                 xmlRelaxNGParsePatterns(ctxt, node->children, 0);
4901         }
4902     } else if (IS_RELAXNG(node, "ref")) {
4903         def = xmlRelaxNGNewDefine(ctxt, node);
4904         if (def == NULL)
4905             return (NULL);
4906         def->type = XML_RELAXNG_REF;
4907         def->name = xmlGetProp(node, BAD_CAST "name");
4908         if (def->name == NULL) {
4909             xmlRngPErr(ctxt, node, XML_RNGP_REF_NO_NAME, "ref has no name\n",
4910                        NULL, NULL);
4911         } else {
4912             xmlRelaxNGNormExtSpace(def->name);
4913             if (xmlValidateNCName(def->name, 0)) {
4914                 xmlRngPErr(ctxt, node, XML_RNGP_REF_NAME_INVALID,
4915                            "ref name '%s' is not an NCName\n", def->name,
4916                            NULL);
4917             }
4918         }
4919         if (node->children != NULL) {
4920             xmlRngPErr(ctxt, node, XML_RNGP_REF_NOT_EMPTY, "ref is not empty\n",
4921                        NULL, NULL);
4922         }
4923         if (ctxt->grammar->refs == NULL)
4924             ctxt->grammar->refs = xmlHashCreate(10);
4925         if (ctxt->grammar->refs == NULL) {
4926             xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
4927                        "Could not create references hash\n", NULL, NULL);
4928             def = NULL;
4929         } else {
4930             int tmp;
4931 
4932             tmp = xmlHashAddEntry(ctxt->grammar->refs, def->name, def);
4933             if (tmp < 0) {
4934                 xmlRelaxNGDefinePtr prev;
4935 
4936                 prev = (xmlRelaxNGDefinePtr)
4937                     xmlHashLookup(ctxt->grammar->refs, def->name);
4938                 if (prev == NULL) {
4939                     if (def->name != NULL) {
4940 		        xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
4941 				   "Error refs definitions '%s'\n",
4942 				   def->name, NULL);
4943                     } else {
4944 		        xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
4945 				   "Error refs definitions\n",
4946 				   NULL, NULL);
4947                     }
4948                     def = NULL;
4949                 } else {
4950                     def->nextHash = prev->nextHash;
4951                     prev->nextHash = def;
4952                 }
4953             }
4954         }
4955     } else if (IS_RELAXNG(node, "data")) {
4956         def = xmlRelaxNGParseData(ctxt, node);
4957     } else if (IS_RELAXNG(node, "value")) {
4958         def = xmlRelaxNGParseValue(ctxt, node);
4959     } else if (IS_RELAXNG(node, "list")) {
4960         def = xmlRelaxNGNewDefine(ctxt, node);
4961         if (def == NULL)
4962             return (NULL);
4963         def->type = XML_RELAXNG_LIST;
4964         if (node->children == NULL) {
4965             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
4966                        "Element %s is empty\n", node->name, NULL);
4967         } else {
4968             def->content =
4969                 xmlRelaxNGParsePatterns(ctxt, node->children, 0);
4970         }
4971     } else if (IS_RELAXNG(node, "interleave")) {
4972         def = xmlRelaxNGParseInterleave(ctxt, node);
4973     } else if (IS_RELAXNG(node, "externalRef")) {
4974         def = xmlRelaxNGProcessExternalRef(ctxt, node);
4975     } else if (IS_RELAXNG(node, "notAllowed")) {
4976         def = xmlRelaxNGNewDefine(ctxt, node);
4977         if (def == NULL)
4978             return (NULL);
4979         def->type = XML_RELAXNG_NOT_ALLOWED;
4980         if (node->children != NULL) {
4981             xmlRngPErr(ctxt, node, XML_RNGP_NOTALLOWED_NOT_EMPTY,
4982                        "xmlRelaxNGParse: notAllowed element is not empty\n",
4983                        NULL, NULL);
4984         }
4985     } else if (IS_RELAXNG(node, "grammar")) {
4986         xmlRelaxNGGrammarPtr grammar, old;
4987         xmlRelaxNGGrammarPtr oldparent;
4988 
4989 #ifdef DEBUG_GRAMMAR
4990         xmlGenericError(xmlGenericErrorContext,
4991                         "Found <grammar> pattern\n");
4992 #endif
4993 
4994         oldparent = ctxt->parentgrammar;
4995         old = ctxt->grammar;
4996         ctxt->parentgrammar = old;
4997         grammar = xmlRelaxNGParseGrammar(ctxt, node->children);
4998         if (old != NULL) {
4999             ctxt->grammar = old;
5000             ctxt->parentgrammar = oldparent;
5001 #if 0
5002             if (grammar != NULL) {
5003                 grammar->next = old->next;
5004                 old->next = grammar;
5005             }
5006 #endif
5007         }
5008         if (grammar != NULL)
5009             def = grammar->start;
5010         else
5011             def = NULL;
5012     } else if (IS_RELAXNG(node, "parentRef")) {
5013         if (ctxt->parentgrammar == NULL) {
5014             xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NO_PARENT,
5015                        "Use of parentRef without a parent grammar\n", NULL,
5016                        NULL);
5017             return (NULL);
5018         }
5019         def = xmlRelaxNGNewDefine(ctxt, node);
5020         if (def == NULL)
5021             return (NULL);
5022         def->type = XML_RELAXNG_PARENTREF;
5023         def->name = xmlGetProp(node, BAD_CAST "name");
5024         if (def->name == NULL) {
5025             xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NO_NAME,
5026                        "parentRef has no name\n", NULL, NULL);
5027         } else {
5028             xmlRelaxNGNormExtSpace(def->name);
5029             if (xmlValidateNCName(def->name, 0)) {
5030                 xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NAME_INVALID,
5031                            "parentRef name '%s' is not an NCName\n",
5032                            def->name, NULL);
5033             }
5034         }
5035         if (node->children != NULL) {
5036             xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NOT_EMPTY,
5037                        "parentRef is not empty\n", NULL, NULL);
5038         }
5039         if (ctxt->parentgrammar->refs == NULL)
5040             ctxt->parentgrammar->refs = xmlHashCreate(10);
5041         if (ctxt->parentgrammar->refs == NULL) {
5042             xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_CREATE_FAILED,
5043                        "Could not create references hash\n", NULL, NULL);
5044             def = NULL;
5045         } else if (def->name != NULL) {
5046             int tmp;
5047 
5048             tmp =
5049                 xmlHashAddEntry(ctxt->parentgrammar->refs, def->name, def);
5050             if (tmp < 0) {
5051                 xmlRelaxNGDefinePtr prev;
5052 
5053                 prev = (xmlRelaxNGDefinePtr)
5054                     xmlHashLookup(ctxt->parentgrammar->refs, def->name);
5055                 if (prev == NULL) {
5056                     xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_CREATE_FAILED,
5057                                "Internal error parentRef definitions '%s'\n",
5058                                def->name, NULL);
5059                     def = NULL;
5060                 } else {
5061                     def->nextHash = prev->nextHash;
5062                     prev->nextHash = def;
5063                 }
5064             }
5065         }
5066     } else if (IS_RELAXNG(node, "mixed")) {
5067         if (node->children == NULL) {
5068             xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT, "Mixed is empty\n",
5069                        NULL, NULL);
5070             def = NULL;
5071         } else {
5072             def = xmlRelaxNGParseInterleave(ctxt, node);
5073             if (def != NULL) {
5074                 xmlRelaxNGDefinePtr tmp;
5075 
5076                 if ((def->content != NULL) && (def->content->next != NULL)) {
5077                     tmp = xmlRelaxNGNewDefine(ctxt, node);
5078                     if (tmp != NULL) {
5079                         tmp->type = XML_RELAXNG_GROUP;
5080                         tmp->content = def->content;
5081                         def->content = tmp;
5082                     }
5083                 }
5084 
5085                 tmp = xmlRelaxNGNewDefine(ctxt, node);
5086                 if (tmp == NULL)
5087                     return (def);
5088                 tmp->type = XML_RELAXNG_TEXT;
5089                 tmp->next = def->content;
5090                 def->content = tmp;
5091             }
5092         }
5093     } else {
5094         xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_CONSTRUCT,
5095                    "Unexpected node %s is not a pattern\n", node->name,
5096                    NULL);
5097         def = NULL;
5098     }
5099     return (def);
5100 }
5101 
5102 /**
5103  * xmlRelaxNGParseAttribute:
5104  * @ctxt:  a Relax-NG parser context
5105  * @node:  the element node
5106  *
5107  * parse the content of a RelaxNG attribute node.
5108  *
5109  * Returns the definition pointer or NULL in case of error.
5110  */
5111 static xmlRelaxNGDefinePtr
xmlRelaxNGParseAttribute(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)5112 xmlRelaxNGParseAttribute(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
5113 {
5114     xmlRelaxNGDefinePtr ret, cur;
5115     xmlNodePtr child;
5116     int old_flags;
5117 
5118     ret = xmlRelaxNGNewDefine(ctxt, node);
5119     if (ret == NULL)
5120         return (NULL);
5121     ret->type = XML_RELAXNG_ATTRIBUTE;
5122     ret->parent = ctxt->def;
5123     child = node->children;
5124     if (child == NULL) {
5125         xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_EMPTY,
5126                    "xmlRelaxNGParseattribute: attribute has no children\n",
5127                    NULL, NULL);
5128         return (ret);
5129     }
5130     old_flags = ctxt->flags;
5131     ctxt->flags |= XML_RELAXNG_IN_ATTRIBUTE;
5132     cur = xmlRelaxNGParseNameClass(ctxt, child, ret);
5133     if (cur != NULL)
5134         child = child->next;
5135 
5136     if (child != NULL) {
5137         cur = xmlRelaxNGParsePattern(ctxt, child);
5138         if (cur != NULL) {
5139             switch (cur->type) {
5140                 case XML_RELAXNG_EMPTY:
5141                 case XML_RELAXNG_NOT_ALLOWED:
5142                 case XML_RELAXNG_TEXT:
5143                 case XML_RELAXNG_ELEMENT:
5144                 case XML_RELAXNG_DATATYPE:
5145                 case XML_RELAXNG_VALUE:
5146                 case XML_RELAXNG_LIST:
5147                 case XML_RELAXNG_REF:
5148                 case XML_RELAXNG_PARENTREF:
5149                 case XML_RELAXNG_EXTERNALREF:
5150                 case XML_RELAXNG_DEF:
5151                 case XML_RELAXNG_ONEORMORE:
5152                 case XML_RELAXNG_ZEROORMORE:
5153                 case XML_RELAXNG_OPTIONAL:
5154                 case XML_RELAXNG_CHOICE:
5155                 case XML_RELAXNG_GROUP:
5156                 case XML_RELAXNG_INTERLEAVE:
5157                 case XML_RELAXNG_ATTRIBUTE:
5158                     ret->content = cur;
5159                     cur->parent = ret;
5160                     break;
5161                 case XML_RELAXNG_START:
5162                 case XML_RELAXNG_PARAM:
5163                 case XML_RELAXNG_EXCEPT:
5164                     xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_CONTENT,
5165                                "attribute has invalid content\n", NULL,
5166                                NULL);
5167                     break;
5168                 case XML_RELAXNG_NOOP:
5169                     xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_NOOP,
5170                                "RNG Internal error, noop found in attribute\n",
5171                                NULL, NULL);
5172                     break;
5173             }
5174         }
5175         child = child->next;
5176     }
5177     if (child != NULL) {
5178         xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_CHILDREN,
5179                    "attribute has multiple children\n", NULL, NULL);
5180     }
5181     ctxt->flags = old_flags;
5182     return (ret);
5183 }
5184 
5185 /**
5186  * xmlRelaxNGParseExceptNameClass:
5187  * @ctxt:  a Relax-NG parser context
5188  * @node:  the except node
5189  * @attr:  1 if within an attribute, 0 if within an element
5190  *
5191  * parse the content of a RelaxNG nameClass node.
5192  *
5193  * Returns the definition pointer or NULL in case of error.
5194  */
5195 static xmlRelaxNGDefinePtr
xmlRelaxNGParseExceptNameClass(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node,int attr)5196 xmlRelaxNGParseExceptNameClass(xmlRelaxNGParserCtxtPtr ctxt,
5197                                xmlNodePtr node, int attr)
5198 {
5199     xmlRelaxNGDefinePtr ret, cur, last = NULL;
5200     xmlNodePtr child;
5201 
5202     if (!IS_RELAXNG(node, "except")) {
5203         xmlRngPErr(ctxt, node, XML_RNGP_EXCEPT_MISSING,
5204                    "Expecting an except node\n", NULL, NULL);
5205         return (NULL);
5206     }
5207     if (node->next != NULL) {
5208         xmlRngPErr(ctxt, node, XML_RNGP_EXCEPT_MULTIPLE,
5209                    "exceptNameClass allows only a single except node\n",
5210                    NULL, NULL);
5211     }
5212     if (node->children == NULL) {
5213         xmlRngPErr(ctxt, node, XML_RNGP_EXCEPT_EMPTY, "except has no content\n",
5214                    NULL, NULL);
5215         return (NULL);
5216     }
5217 
5218     ret = xmlRelaxNGNewDefine(ctxt, node);
5219     if (ret == NULL)
5220         return (NULL);
5221     ret->type = XML_RELAXNG_EXCEPT;
5222     child = node->children;
5223     while (child != NULL) {
5224         cur = xmlRelaxNGNewDefine(ctxt, child);
5225         if (cur == NULL)
5226             break;
5227         if (attr)
5228             cur->type = XML_RELAXNG_ATTRIBUTE;
5229         else
5230             cur->type = XML_RELAXNG_ELEMENT;
5231 
5232         if (xmlRelaxNGParseNameClass(ctxt, child, cur) != NULL) {
5233             if (last == NULL) {
5234                 ret->content = cur;
5235             } else {
5236                 last->next = cur;
5237             }
5238             last = cur;
5239         }
5240         child = child->next;
5241     }
5242 
5243     return (ret);
5244 }
5245 
5246 /**
5247  * xmlRelaxNGParseNameClass:
5248  * @ctxt:  a Relax-NG parser context
5249  * @node:  the nameClass node
5250  * @def:  the current definition
5251  *
5252  * parse the content of a RelaxNG nameClass node.
5253  *
5254  * Returns the definition pointer or NULL in case of error.
5255  */
5256 static xmlRelaxNGDefinePtr
xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node,xmlRelaxNGDefinePtr def)5257 xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node,
5258                          xmlRelaxNGDefinePtr def)
5259 {
5260     xmlRelaxNGDefinePtr ret, tmp;
5261     xmlChar *val;
5262 
5263     ret = def;
5264     if ((IS_RELAXNG(node, "name")) || (IS_RELAXNG(node, "anyName")) ||
5265         (IS_RELAXNG(node, "nsName"))) {
5266         if ((def->type != XML_RELAXNG_ELEMENT) &&
5267             (def->type != XML_RELAXNG_ATTRIBUTE)) {
5268             ret = xmlRelaxNGNewDefine(ctxt, node);
5269             if (ret == NULL)
5270                 return (NULL);
5271             ret->parent = def;
5272             if (ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE)
5273                 ret->type = XML_RELAXNG_ATTRIBUTE;
5274             else
5275                 ret->type = XML_RELAXNG_ELEMENT;
5276         }
5277     }
5278     if (IS_RELAXNG(node, "name")) {
5279         val = xmlNodeGetContent(node);
5280         xmlRelaxNGNormExtSpace(val);
5281         if (xmlValidateNCName(val, 0)) {
5282 	    if (node->parent != NULL)
5283 		xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_NAME,
5284 			   "Element %s name '%s' is not an NCName\n",
5285 			   node->parent->name, val);
5286 	    else
5287 		xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_NAME,
5288 			   "name '%s' is not an NCName\n",
5289 			   val, NULL);
5290         }
5291         ret->name = val;
5292         val = xmlGetProp(node, BAD_CAST "ns");
5293         ret->ns = val;
5294         if ((ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE) &&
5295             (val != NULL) &&
5296             (xmlStrEqual(val, BAD_CAST "http://www.w3.org/2000/xmlns"))) {
5297 	    xmlRngPErr(ctxt, node, XML_RNGP_XML_NS,
5298                         "Attribute with namespace '%s' is not allowed\n",
5299                         val, NULL);
5300         }
5301         if ((ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE) &&
5302             (val != NULL) &&
5303             (val[0] == 0) && (xmlStrEqual(ret->name, BAD_CAST "xmlns"))) {
5304 	    xmlRngPErr(ctxt, node, XML_RNGP_XMLNS_NAME,
5305                        "Attribute with QName 'xmlns' is not allowed\n",
5306                        val, NULL);
5307         }
5308     } else if (IS_RELAXNG(node, "anyName")) {
5309         ret->name = NULL;
5310         ret->ns = NULL;
5311         if (node->children != NULL) {
5312             ret->nameClass =
5313                 xmlRelaxNGParseExceptNameClass(ctxt, node->children,
5314                                                (def->type ==
5315                                                 XML_RELAXNG_ATTRIBUTE));
5316         }
5317     } else if (IS_RELAXNG(node, "nsName")) {
5318         ret->name = NULL;
5319         ret->ns = xmlGetProp(node, BAD_CAST "ns");
5320         if (ret->ns == NULL) {
5321             xmlRngPErr(ctxt, node, XML_RNGP_NSNAME_NO_NS,
5322                        "nsName has no ns attribute\n", NULL, NULL);
5323         }
5324         if ((ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE) &&
5325             (ret->ns != NULL) &&
5326             (xmlStrEqual
5327              (ret->ns, BAD_CAST "http://www.w3.org/2000/xmlns"))) {
5328             xmlRngPErr(ctxt, node, XML_RNGP_XML_NS,
5329                        "Attribute with namespace '%s' is not allowed\n",
5330                        ret->ns, NULL);
5331         }
5332         if (node->children != NULL) {
5333             ret->nameClass =
5334                 xmlRelaxNGParseExceptNameClass(ctxt, node->children,
5335                                                (def->type ==
5336                                                 XML_RELAXNG_ATTRIBUTE));
5337         }
5338     } else if (IS_RELAXNG(node, "choice")) {
5339         xmlNodePtr child;
5340         xmlRelaxNGDefinePtr last = NULL;
5341 
5342         ret = xmlRelaxNGNewDefine(ctxt, node);
5343         if (ret == NULL)
5344             return (NULL);
5345         ret->parent = def;
5346         ret->type = XML_RELAXNG_CHOICE;
5347 
5348         if (node->children == NULL) {
5349             xmlRngPErr(ctxt, node, XML_RNGP_CHOICE_EMPTY,
5350                        "Element choice is empty\n", NULL, NULL);
5351         } else {
5352 
5353             child = node->children;
5354             while (child != NULL) {
5355                 tmp = xmlRelaxNGParseNameClass(ctxt, child, ret);
5356                 if (tmp != NULL) {
5357                     if (last == NULL) {
5358                         last = ret->nameClass = tmp;
5359                     } else {
5360                         last->next = tmp;
5361                         last = tmp;
5362                     }
5363                 }
5364                 child = child->next;
5365             }
5366         }
5367     } else {
5368         xmlRngPErr(ctxt, node, XML_RNGP_CHOICE_CONTENT,
5369                    "expecting name, anyName, nsName or choice : got %s\n",
5370                    (node == NULL ? (const xmlChar *) "nothing" : node->name),
5371 		   NULL);
5372         return (NULL);
5373     }
5374     if (ret != def) {
5375         if (def->nameClass == NULL) {
5376             def->nameClass = ret;
5377         } else {
5378             tmp = def->nameClass;
5379             while (tmp->next != NULL) {
5380                 tmp = tmp->next;
5381             }
5382             tmp->next = ret;
5383         }
5384     }
5385     return (ret);
5386 }
5387 
5388 /**
5389  * xmlRelaxNGParseElement:
5390  * @ctxt:  a Relax-NG parser context
5391  * @node:  the element node
5392  *
5393  * parse the content of a RelaxNG element node.
5394  *
5395  * Returns the definition pointer or NULL in case of error.
5396  */
5397 static xmlRelaxNGDefinePtr
xmlRelaxNGParseElement(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)5398 xmlRelaxNGParseElement(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
5399 {
5400     xmlRelaxNGDefinePtr ret, cur, last;
5401     xmlNodePtr child;
5402     const xmlChar *olddefine;
5403 
5404     ret = xmlRelaxNGNewDefine(ctxt, node);
5405     if (ret == NULL)
5406         return (NULL);
5407     ret->type = XML_RELAXNG_ELEMENT;
5408     ret->parent = ctxt->def;
5409     child = node->children;
5410     if (child == NULL) {
5411         xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_EMPTY,
5412                    "xmlRelaxNGParseElement: element has no children\n",
5413                    NULL, NULL);
5414         return (ret);
5415     }
5416     cur = xmlRelaxNGParseNameClass(ctxt, child, ret);
5417     if (cur != NULL)
5418         child = child->next;
5419 
5420     if (child == NULL) {
5421         xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_NO_CONTENT,
5422                    "xmlRelaxNGParseElement: element has no content\n",
5423                    NULL, NULL);
5424         return (ret);
5425     }
5426     olddefine = ctxt->define;
5427     ctxt->define = NULL;
5428     last = NULL;
5429     while (child != NULL) {
5430         cur = xmlRelaxNGParsePattern(ctxt, child);
5431         if (cur != NULL) {
5432             cur->parent = ret;
5433             switch (cur->type) {
5434                 case XML_RELAXNG_EMPTY:
5435                 case XML_RELAXNG_NOT_ALLOWED:
5436                 case XML_RELAXNG_TEXT:
5437                 case XML_RELAXNG_ELEMENT:
5438                 case XML_RELAXNG_DATATYPE:
5439                 case XML_RELAXNG_VALUE:
5440                 case XML_RELAXNG_LIST:
5441                 case XML_RELAXNG_REF:
5442                 case XML_RELAXNG_PARENTREF:
5443                 case XML_RELAXNG_EXTERNALREF:
5444                 case XML_RELAXNG_DEF:
5445                 case XML_RELAXNG_ZEROORMORE:
5446                 case XML_RELAXNG_ONEORMORE:
5447                 case XML_RELAXNG_OPTIONAL:
5448                 case XML_RELAXNG_CHOICE:
5449                 case XML_RELAXNG_GROUP:
5450                 case XML_RELAXNG_INTERLEAVE:
5451                     if (last == NULL) {
5452                         ret->content = last = cur;
5453                     } else {
5454                         if ((last->type == XML_RELAXNG_ELEMENT) &&
5455                             (ret->content == last)) {
5456                             ret->content = xmlRelaxNGNewDefine(ctxt, node);
5457                             if (ret->content != NULL) {
5458                                 ret->content->type = XML_RELAXNG_GROUP;
5459                                 ret->content->content = last;
5460                             } else {
5461                                 ret->content = last;
5462                             }
5463                         }
5464                         last->next = cur;
5465                         last = cur;
5466                     }
5467                     break;
5468                 case XML_RELAXNG_ATTRIBUTE:
5469                     cur->next = ret->attrs;
5470                     ret->attrs = cur;
5471                     break;
5472                 case XML_RELAXNG_START:
5473                     xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
5474                                "RNG Internal error, start found in element\n",
5475                                NULL, NULL);
5476                     break;
5477                 case XML_RELAXNG_PARAM:
5478                     xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
5479                                "RNG Internal error, param found in element\n",
5480                                NULL, NULL);
5481                     break;
5482                 case XML_RELAXNG_EXCEPT:
5483                     xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
5484                                "RNG Internal error, except found in element\n",
5485                                NULL, NULL);
5486                     break;
5487                 case XML_RELAXNG_NOOP:
5488                     xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
5489                                "RNG Internal error, noop found in element\n",
5490                                NULL, NULL);
5491                     break;
5492             }
5493         }
5494         child = child->next;
5495     }
5496     ctxt->define = olddefine;
5497     return (ret);
5498 }
5499 
5500 /**
5501  * xmlRelaxNGParsePatterns:
5502  * @ctxt:  a Relax-NG parser context
5503  * @nodes:  list of nodes
5504  * @group:  use an implicit <group> for elements
5505  *
5506  * parse the content of a RelaxNG start node.
5507  *
5508  * Returns the definition pointer or NULL in case of error.
5509  */
5510 static xmlRelaxNGDefinePtr
xmlRelaxNGParsePatterns(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr nodes,int group)5511 xmlRelaxNGParsePatterns(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr nodes,
5512                         int group)
5513 {
5514     xmlRelaxNGDefinePtr def = NULL, last = NULL, cur, parent;
5515 
5516     parent = ctxt->def;
5517     while (nodes != NULL) {
5518         if (IS_RELAXNG(nodes, "element")) {
5519             cur = xmlRelaxNGParseElement(ctxt, nodes);
5520             if (def == NULL) {
5521                 def = last = cur;
5522             } else {
5523                 if ((group == 1) && (def->type == XML_RELAXNG_ELEMENT) &&
5524                     (def == last)) {
5525                     def = xmlRelaxNGNewDefine(ctxt, nodes);
5526                     def->type = XML_RELAXNG_GROUP;
5527                     def->content = last;
5528                 }
5529                 last->next = cur;
5530                 last = cur;
5531             }
5532             cur->parent = parent;
5533         } else {
5534             cur = xmlRelaxNGParsePattern(ctxt, nodes);
5535             if (cur != NULL) {
5536                 if (def == NULL) {
5537                     def = last = cur;
5538                 } else {
5539                     last->next = cur;
5540                     last = cur;
5541                 }
5542             }
5543         }
5544         nodes = nodes->next;
5545     }
5546     return (def);
5547 }
5548 
5549 /**
5550  * xmlRelaxNGParseStart:
5551  * @ctxt:  a Relax-NG parser context
5552  * @nodes:  start children nodes
5553  *
5554  * parse the content of a RelaxNG start node.
5555  *
5556  * Returns 0 in case of success, -1 in case of error
5557  */
5558 static int
xmlRelaxNGParseStart(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr nodes)5559 xmlRelaxNGParseStart(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr nodes)
5560 {
5561     int ret = 0;
5562     xmlRelaxNGDefinePtr def = NULL, last;
5563 
5564     if (nodes == NULL) {
5565         xmlRngPErr(ctxt, nodes, XML_RNGP_START_EMPTY, "start has no children\n",
5566                    NULL, NULL);
5567         return (-1);
5568     }
5569     if (IS_RELAXNG(nodes, "empty")) {
5570         def = xmlRelaxNGNewDefine(ctxt, nodes);
5571         if (def == NULL)
5572             return (-1);
5573         def->type = XML_RELAXNG_EMPTY;
5574         if (nodes->children != NULL) {
5575             xmlRngPErr(ctxt, nodes, XML_RNGP_EMPTY_CONTENT,
5576                        "element empty is not empty\n", NULL, NULL);
5577         }
5578     } else if (IS_RELAXNG(nodes, "notAllowed")) {
5579         def = xmlRelaxNGNewDefine(ctxt, nodes);
5580         if (def == NULL)
5581             return (-1);
5582         def->type = XML_RELAXNG_NOT_ALLOWED;
5583         if (nodes->children != NULL) {
5584             xmlRngPErr(ctxt, nodes, XML_RNGP_NOTALLOWED_NOT_EMPTY,
5585                        "element notAllowed is not empty\n", NULL, NULL);
5586         }
5587     } else {
5588         def = xmlRelaxNGParsePatterns(ctxt, nodes, 1);
5589     }
5590     if (ctxt->grammar->start != NULL) {
5591         last = ctxt->grammar->start;
5592         while (last->next != NULL)
5593             last = last->next;
5594         last->next = def;
5595     } else {
5596         ctxt->grammar->start = def;
5597     }
5598     nodes = nodes->next;
5599     if (nodes != NULL) {
5600         xmlRngPErr(ctxt, nodes, XML_RNGP_START_CONTENT,
5601                    "start more than one children\n", NULL, NULL);
5602         return (-1);
5603     }
5604     return (ret);
5605 }
5606 
5607 /**
5608  * xmlRelaxNGParseGrammarContent:
5609  * @ctxt:  a Relax-NG parser context
5610  * @nodes:  grammar children nodes
5611  *
5612  * parse the content of a RelaxNG grammar node.
5613  *
5614  * Returns 0 in case of success, -1 in case of error
5615  */
5616 static int
xmlRelaxNGParseGrammarContent(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr nodes)5617 xmlRelaxNGParseGrammarContent(xmlRelaxNGParserCtxtPtr ctxt,
5618                               xmlNodePtr nodes)
5619 {
5620     int ret = 0, tmp;
5621 
5622     if (nodes == NULL) {
5623         xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_EMPTY,
5624                    "grammar has no children\n", NULL, NULL);
5625         return (-1);
5626     }
5627     while (nodes != NULL) {
5628         if (IS_RELAXNG(nodes, "start")) {
5629             if (nodes->children == NULL) {
5630                 xmlRngPErr(ctxt, nodes, XML_RNGP_START_EMPTY,
5631                            "start has no children\n", NULL, NULL);
5632             } else {
5633                 tmp = xmlRelaxNGParseStart(ctxt, nodes->children);
5634                 if (tmp != 0)
5635                     ret = -1;
5636             }
5637         } else if (IS_RELAXNG(nodes, "define")) {
5638             tmp = xmlRelaxNGParseDefine(ctxt, nodes);
5639             if (tmp != 0)
5640                 ret = -1;
5641         } else if (IS_RELAXNG(nodes, "include")) {
5642             tmp = xmlRelaxNGParseInclude(ctxt, nodes);
5643             if (tmp != 0)
5644                 ret = -1;
5645         } else {
5646             xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_CONTENT,
5647                        "grammar has unexpected child %s\n", nodes->name,
5648                        NULL);
5649             ret = -1;
5650         }
5651         nodes = nodes->next;
5652     }
5653     return (ret);
5654 }
5655 
5656 /**
5657  * xmlRelaxNGCheckReference:
5658  * @ref:  the ref
5659  * @ctxt:  a Relax-NG parser context
5660  * @name:  the name associated to the defines
5661  *
5662  * Applies the 4.17. combine attribute rule for all the define
5663  * element of a given grammar using the same name.
5664  */
5665 static void
xmlRelaxNGCheckReference(xmlRelaxNGDefinePtr ref,xmlRelaxNGParserCtxtPtr ctxt,const xmlChar * name)5666 xmlRelaxNGCheckReference(xmlRelaxNGDefinePtr ref,
5667                          xmlRelaxNGParserCtxtPtr ctxt,
5668                          const xmlChar * name)
5669 {
5670     xmlRelaxNGGrammarPtr grammar;
5671     xmlRelaxNGDefinePtr def, cur;
5672 
5673     /*
5674      * Those rules don't apply to imported ref from xmlRelaxNGParseImportRef
5675      */
5676     if (ref->dflags & IS_EXTERNAL_REF)
5677         return;
5678 
5679     grammar = ctxt->grammar;
5680     if (grammar == NULL) {
5681         xmlRngPErr(ctxt, ref->node, XML_ERR_INTERNAL_ERROR,
5682                    "Internal error: no grammar in CheckReference %s\n",
5683                    name, NULL);
5684         return;
5685     }
5686     if (ref->content != NULL) {
5687         xmlRngPErr(ctxt, ref->node, XML_ERR_INTERNAL_ERROR,
5688                    "Internal error: reference has content in CheckReference %s\n",
5689                    name, NULL);
5690         return;
5691     }
5692     if (grammar->defs != NULL) {
5693         def = xmlHashLookup(grammar->defs, name);
5694         if (def != NULL) {
5695             cur = ref;
5696             while (cur != NULL) {
5697                 cur->content = def;
5698                 cur = cur->nextHash;
5699             }
5700         } else {
5701             xmlRngPErr(ctxt, ref->node, XML_RNGP_REF_NO_DEF,
5702                        "Reference %s has no matching definition\n", name,
5703                        NULL);
5704         }
5705     } else {
5706         xmlRngPErr(ctxt, ref->node, XML_RNGP_REF_NO_DEF,
5707                    "Reference %s has no matching definition\n", name,
5708                    NULL);
5709     }
5710 }
5711 
5712 /**
5713  * xmlRelaxNGCheckCombine:
5714  * @define:  the define(s) list
5715  * @ctxt:  a Relax-NG parser context
5716  * @name:  the name associated to the defines
5717  *
5718  * Applies the 4.17. combine attribute rule for all the define
5719  * element of a given grammar using the same name.
5720  */
5721 static void
xmlRelaxNGCheckCombine(xmlRelaxNGDefinePtr define,xmlRelaxNGParserCtxtPtr ctxt,const xmlChar * name)5722 xmlRelaxNGCheckCombine(xmlRelaxNGDefinePtr define,
5723                        xmlRelaxNGParserCtxtPtr ctxt, const xmlChar * name)
5724 {
5725     xmlChar *combine;
5726     int choiceOrInterleave = -1;
5727     int missing = 0;
5728     xmlRelaxNGDefinePtr cur, last, tmp, tmp2;
5729 
5730     if (define->nextHash == NULL)
5731         return;
5732     cur = define;
5733     while (cur != NULL) {
5734         combine = xmlGetProp(cur->node, BAD_CAST "combine");
5735         if (combine != NULL) {
5736             if (xmlStrEqual(combine, BAD_CAST "choice")) {
5737                 if (choiceOrInterleave == -1)
5738                     choiceOrInterleave = 1;
5739                 else if (choiceOrInterleave == 0) {
5740                     xmlRngPErr(ctxt, define->node, XML_RNGP_DEF_CHOICE_AND_INTERLEAVE,
5741                                "Defines for %s use both 'choice' and 'interleave'\n",
5742                                name, NULL);
5743                 }
5744             } else if (xmlStrEqual(combine, BAD_CAST "interleave")) {
5745                 if (choiceOrInterleave == -1)
5746                     choiceOrInterleave = 0;
5747                 else if (choiceOrInterleave == 1) {
5748                     xmlRngPErr(ctxt, define->node, XML_RNGP_DEF_CHOICE_AND_INTERLEAVE,
5749                                "Defines for %s use both 'choice' and 'interleave'\n",
5750                                name, NULL);
5751                 }
5752             } else {
5753                 xmlRngPErr(ctxt, define->node, XML_RNGP_UNKNOWN_COMBINE,
5754                            "Defines for %s use unknown combine value '%s''\n",
5755                            name, combine);
5756             }
5757             xmlFree(combine);
5758         } else {
5759             if (missing == 0)
5760                 missing = 1;
5761             else {
5762                 xmlRngPErr(ctxt, define->node, XML_RNGP_NEED_COMBINE,
5763                            "Some defines for %s needs the combine attribute\n",
5764                            name, NULL);
5765             }
5766         }
5767 
5768         cur = cur->nextHash;
5769     }
5770 #ifdef DEBUG
5771     xmlGenericError(xmlGenericErrorContext,
5772                     "xmlRelaxNGCheckCombine(): merging %s defines: %d\n",
5773                     name, choiceOrInterleave);
5774 #endif
5775     if (choiceOrInterleave == -1)
5776         choiceOrInterleave = 0;
5777     cur = xmlRelaxNGNewDefine(ctxt, define->node);
5778     if (cur == NULL)
5779         return;
5780     if (choiceOrInterleave == 0)
5781         cur->type = XML_RELAXNG_INTERLEAVE;
5782     else
5783         cur->type = XML_RELAXNG_CHOICE;
5784     tmp = define;
5785     last = NULL;
5786     while (tmp != NULL) {
5787         if (tmp->content != NULL) {
5788             if (tmp->content->next != NULL) {
5789                 /*
5790                  * we need first to create a wrapper.
5791                  */
5792                 tmp2 = xmlRelaxNGNewDefine(ctxt, tmp->content->node);
5793                 if (tmp2 == NULL)
5794                     break;
5795                 tmp2->type = XML_RELAXNG_GROUP;
5796                 tmp2->content = tmp->content;
5797             } else {
5798                 tmp2 = tmp->content;
5799             }
5800             if (last == NULL) {
5801                 cur->content = tmp2;
5802             } else {
5803                 last->next = tmp2;
5804             }
5805             last = tmp2;
5806         }
5807         tmp->content = cur;
5808         tmp = tmp->nextHash;
5809     }
5810     define->content = cur;
5811     if (choiceOrInterleave == 0) {
5812         if (ctxt->interleaves == NULL)
5813             ctxt->interleaves = xmlHashCreate(10);
5814         if (ctxt->interleaves == NULL) {
5815             xmlRngPErr(ctxt, define->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
5816                        "Failed to create interleaves hash table\n", NULL,
5817                        NULL);
5818         } else {
5819             char tmpname[32];
5820 
5821             snprintf(tmpname, 32, "interleave%d", ctxt->nbInterleaves++);
5822             if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST tmpname, cur) <
5823                 0) {
5824                 xmlRngPErr(ctxt, define->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
5825                            "Failed to add %s to hash table\n",
5826 			   (const xmlChar *) tmpname, NULL);
5827             }
5828         }
5829     }
5830 }
5831 
5832 /**
5833  * xmlRelaxNGCombineStart:
5834  * @ctxt:  a Relax-NG parser context
5835  * @grammar:  the grammar
5836  *
5837  * Applies the 4.17. combine rule for all the start
5838  * element of a given grammar.
5839  */
5840 static void
xmlRelaxNGCombineStart(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGGrammarPtr grammar)5841 xmlRelaxNGCombineStart(xmlRelaxNGParserCtxtPtr ctxt,
5842                        xmlRelaxNGGrammarPtr grammar)
5843 {
5844     xmlRelaxNGDefinePtr starts;
5845     xmlChar *combine;
5846     int choiceOrInterleave = -1;
5847     int missing = 0;
5848     xmlRelaxNGDefinePtr cur;
5849 
5850     starts = grammar->start;
5851     if ((starts == NULL) || (starts->next == NULL))
5852         return;
5853     cur = starts;
5854     while (cur != NULL) {
5855         if ((cur->node == NULL) || (cur->node->parent == NULL) ||
5856             (!xmlStrEqual(cur->node->parent->name, BAD_CAST "start"))) {
5857             combine = NULL;
5858             xmlRngPErr(ctxt, cur->node, XML_RNGP_START_MISSING,
5859                        "Internal error: start element not found\n", NULL,
5860                        NULL);
5861         } else {
5862             combine = xmlGetProp(cur->node->parent, BAD_CAST "combine");
5863         }
5864 
5865         if (combine != NULL) {
5866             if (xmlStrEqual(combine, BAD_CAST "choice")) {
5867                 if (choiceOrInterleave == -1)
5868                     choiceOrInterleave = 1;
5869                 else if (choiceOrInterleave == 0) {
5870                     xmlRngPErr(ctxt, cur->node, XML_RNGP_START_CHOICE_AND_INTERLEAVE,
5871                                "<start> use both 'choice' and 'interleave'\n",
5872                                NULL, NULL);
5873                 }
5874             } else if (xmlStrEqual(combine, BAD_CAST "interleave")) {
5875                 if (choiceOrInterleave == -1)
5876                     choiceOrInterleave = 0;
5877                 else if (choiceOrInterleave == 1) {
5878                     xmlRngPErr(ctxt, cur->node, XML_RNGP_START_CHOICE_AND_INTERLEAVE,
5879                                "<start> use both 'choice' and 'interleave'\n",
5880                                NULL, NULL);
5881                 }
5882             } else {
5883                 xmlRngPErr(ctxt, cur->node, XML_RNGP_UNKNOWN_COMBINE,
5884                            "<start> uses unknown combine value '%s''\n",
5885                            combine, NULL);
5886             }
5887             xmlFree(combine);
5888         } else {
5889             if (missing == 0)
5890                 missing = 1;
5891             else {
5892                 xmlRngPErr(ctxt, cur->node, XML_RNGP_NEED_COMBINE,
5893                            "Some <start> element miss the combine attribute\n",
5894                            NULL, NULL);
5895             }
5896         }
5897 
5898         cur = cur->next;
5899     }
5900 #ifdef DEBUG
5901     xmlGenericError(xmlGenericErrorContext,
5902                     "xmlRelaxNGCombineStart(): merging <start>: %d\n",
5903                     choiceOrInterleave);
5904 #endif
5905     if (choiceOrInterleave == -1)
5906         choiceOrInterleave = 0;
5907     cur = xmlRelaxNGNewDefine(ctxt, starts->node);
5908     if (cur == NULL)
5909         return;
5910     if (choiceOrInterleave == 0)
5911         cur->type = XML_RELAXNG_INTERLEAVE;
5912     else
5913         cur->type = XML_RELAXNG_CHOICE;
5914     cur->content = grammar->start;
5915     grammar->start = cur;
5916     if (choiceOrInterleave == 0) {
5917         if (ctxt->interleaves == NULL)
5918             ctxt->interleaves = xmlHashCreate(10);
5919         if (ctxt->interleaves == NULL) {
5920             xmlRngPErr(ctxt, cur->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
5921                        "Failed to create interleaves hash table\n", NULL,
5922                        NULL);
5923         } else {
5924             char tmpname[32];
5925 
5926             snprintf(tmpname, 32, "interleave%d", ctxt->nbInterleaves++);
5927             if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST tmpname, cur) <
5928                 0) {
5929                 xmlRngPErr(ctxt, cur->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
5930                            "Failed to add %s to hash table\n",
5931 			   (const xmlChar *) tmpname, NULL);
5932             }
5933         }
5934     }
5935 }
5936 
5937 /**
5938  * xmlRelaxNGCheckCycles:
5939  * @ctxt:  a Relax-NG parser context
5940  * @nodes:  grammar children nodes
5941  * @depth:  the counter
5942  *
5943  * Check for cycles.
5944  *
5945  * Returns 0 if check passed, and -1 in case of error
5946  */
5947 static int
xmlRelaxNGCheckCycles(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr cur,int depth)5948 xmlRelaxNGCheckCycles(xmlRelaxNGParserCtxtPtr ctxt,
5949                       xmlRelaxNGDefinePtr cur, int depth)
5950 {
5951     int ret = 0;
5952 
5953     while ((ret == 0) && (cur != NULL)) {
5954         if ((cur->type == XML_RELAXNG_REF) ||
5955             (cur->type == XML_RELAXNG_PARENTREF)) {
5956             if (cur->depth == -1) {
5957                 cur->depth = depth;
5958                 ret = xmlRelaxNGCheckCycles(ctxt, cur->content, depth);
5959                 cur->depth = -2;
5960             } else if (depth == cur->depth) {
5961                 xmlRngPErr(ctxt, cur->node, XML_RNGP_REF_CYCLE,
5962                            "Detected a cycle in %s references\n",
5963                            cur->name, NULL);
5964                 return (-1);
5965             }
5966         } else if (cur->type == XML_RELAXNG_ELEMENT) {
5967             ret = xmlRelaxNGCheckCycles(ctxt, cur->content, depth + 1);
5968         } else {
5969             ret = xmlRelaxNGCheckCycles(ctxt, cur->content, depth);
5970         }
5971         cur = cur->next;
5972     }
5973     return (ret);
5974 }
5975 
5976 /**
5977  * xmlRelaxNGTryUnlink:
5978  * @ctxt:  a Relax-NG parser context
5979  * @cur:  the definition to unlink
5980  * @parent:  the parent definition
5981  * @prev:  the previous sibling definition
5982  *
5983  * Try to unlink a definition. If not possble make it a NOOP
5984  *
5985  * Returns the new prev definition
5986  */
5987 static xmlRelaxNGDefinePtr
xmlRelaxNGTryUnlink(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,xmlRelaxNGDefinePtr cur,xmlRelaxNGDefinePtr parent,xmlRelaxNGDefinePtr prev)5988 xmlRelaxNGTryUnlink(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
5989                     xmlRelaxNGDefinePtr cur,
5990                     xmlRelaxNGDefinePtr parent, xmlRelaxNGDefinePtr prev)
5991 {
5992     if (prev != NULL) {
5993         prev->next = cur->next;
5994     } else {
5995         if (parent != NULL) {
5996             if (parent->content == cur)
5997                 parent->content = cur->next;
5998             else if (parent->attrs == cur)
5999                 parent->attrs = cur->next;
6000             else if (parent->nameClass == cur)
6001                 parent->nameClass = cur->next;
6002         } else {
6003             cur->type = XML_RELAXNG_NOOP;
6004             prev = cur;
6005         }
6006     }
6007     return (prev);
6008 }
6009 
6010 /**
6011  * xmlRelaxNGSimplify:
6012  * @ctxt:  a Relax-NG parser context
6013  * @nodes:  grammar children nodes
6014  *
6015  * Check for simplification of empty and notAllowed
6016  */
6017 static void
xmlRelaxNGSimplify(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr cur,xmlRelaxNGDefinePtr parent)6018 xmlRelaxNGSimplify(xmlRelaxNGParserCtxtPtr ctxt,
6019                    xmlRelaxNGDefinePtr cur, xmlRelaxNGDefinePtr parent)
6020 {
6021     xmlRelaxNGDefinePtr prev = NULL;
6022 
6023     while (cur != NULL) {
6024         if ((cur->type == XML_RELAXNG_REF) ||
6025             (cur->type == XML_RELAXNG_PARENTREF)) {
6026             if (cur->depth != -3) {
6027                 cur->depth = -3;
6028                 xmlRelaxNGSimplify(ctxt, cur->content, cur);
6029             }
6030         } else if (cur->type == XML_RELAXNG_NOT_ALLOWED) {
6031             cur->parent = parent;
6032             if ((parent != NULL) &&
6033                 ((parent->type == XML_RELAXNG_ATTRIBUTE) ||
6034                  (parent->type == XML_RELAXNG_LIST) ||
6035                  (parent->type == XML_RELAXNG_GROUP) ||
6036                  (parent->type == XML_RELAXNG_INTERLEAVE) ||
6037                  (parent->type == XML_RELAXNG_ONEORMORE) ||
6038                  (parent->type == XML_RELAXNG_ZEROORMORE))) {
6039                 parent->type = XML_RELAXNG_NOT_ALLOWED;
6040                 break;
6041             }
6042             if ((parent != NULL) && (parent->type == XML_RELAXNG_CHOICE)) {
6043                 prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
6044             } else
6045                 prev = cur;
6046         } else if (cur->type == XML_RELAXNG_EMPTY) {
6047             cur->parent = parent;
6048             if ((parent != NULL) &&
6049                 ((parent->type == XML_RELAXNG_ONEORMORE) ||
6050                  (parent->type == XML_RELAXNG_ZEROORMORE))) {
6051                 parent->type = XML_RELAXNG_EMPTY;
6052                 break;
6053             }
6054             if ((parent != NULL) &&
6055                 ((parent->type == XML_RELAXNG_GROUP) ||
6056                  (parent->type == XML_RELAXNG_INTERLEAVE))) {
6057                 prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
6058             } else
6059                 prev = cur;
6060         } else {
6061             cur->parent = parent;
6062             if (cur->content != NULL)
6063                 xmlRelaxNGSimplify(ctxt, cur->content, cur);
6064             if ((cur->type != XML_RELAXNG_VALUE) && (cur->attrs != NULL))
6065                 xmlRelaxNGSimplify(ctxt, cur->attrs, cur);
6066             if (cur->nameClass != NULL)
6067                 xmlRelaxNGSimplify(ctxt, cur->nameClass, cur);
6068             /*
6069              * On Elements, try to move attribute only generating rules on
6070              * the attrs rules.
6071              */
6072             if (cur->type == XML_RELAXNG_ELEMENT) {
6073                 int attronly;
6074                 xmlRelaxNGDefinePtr tmp, pre;
6075 
6076                 while (cur->content != NULL) {
6077                     attronly =
6078                         xmlRelaxNGGenerateAttributes(ctxt, cur->content);
6079                     if (attronly == 1) {
6080                         /*
6081                          * migrate cur->content to attrs
6082                          */
6083                         tmp = cur->content;
6084                         cur->content = tmp->next;
6085                         tmp->next = cur->attrs;
6086                         cur->attrs = tmp;
6087                     } else {
6088                         /*
6089                          * cur->content can generate elements or text
6090                          */
6091                         break;
6092                     }
6093                 }
6094                 pre = cur->content;
6095                 while ((pre != NULL) && (pre->next != NULL)) {
6096                     tmp = pre->next;
6097                     attronly = xmlRelaxNGGenerateAttributes(ctxt, tmp);
6098                     if (attronly == 1) {
6099                         /*
6100                          * migrate tmp to attrs
6101                          */
6102                         pre->next = tmp->next;
6103                         tmp->next = cur->attrs;
6104                         cur->attrs = tmp;
6105                     } else {
6106                         pre = tmp;
6107                     }
6108                 }
6109             }
6110             /*
6111              * This may result in a simplification
6112              */
6113             if ((cur->type == XML_RELAXNG_GROUP) ||
6114                 (cur->type == XML_RELAXNG_INTERLEAVE)) {
6115                 if (cur->content == NULL)
6116                     cur->type = XML_RELAXNG_EMPTY;
6117                 else if (cur->content->next == NULL) {
6118                     if ((parent == NULL) && (prev == NULL)) {
6119                         cur->type = XML_RELAXNG_NOOP;
6120                     } else if (prev == NULL) {
6121                         parent->content = cur->content;
6122                         cur->content->next = cur->next;
6123                         cur = cur->content;
6124                     } else {
6125                         cur->content->next = cur->next;
6126                         prev->next = cur->content;
6127                         cur = cur->content;
6128                     }
6129                 }
6130             }
6131             /*
6132              * the current node may have been transformed back
6133              */
6134             if ((cur->type == XML_RELAXNG_EXCEPT) &&
6135                 (cur->content != NULL) &&
6136                 (cur->content->type == XML_RELAXNG_NOT_ALLOWED)) {
6137                 prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
6138             } else if (cur->type == XML_RELAXNG_NOT_ALLOWED) {
6139                 if ((parent != NULL) &&
6140                     ((parent->type == XML_RELAXNG_ATTRIBUTE) ||
6141                      (parent->type == XML_RELAXNG_LIST) ||
6142                      (parent->type == XML_RELAXNG_GROUP) ||
6143                      (parent->type == XML_RELAXNG_INTERLEAVE) ||
6144                      (parent->type == XML_RELAXNG_ONEORMORE) ||
6145                      (parent->type == XML_RELAXNG_ZEROORMORE))) {
6146                     parent->type = XML_RELAXNG_NOT_ALLOWED;
6147                     break;
6148                 }
6149                 if ((parent != NULL) &&
6150                     (parent->type == XML_RELAXNG_CHOICE)) {
6151                     prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
6152                 } else
6153                     prev = cur;
6154             } else if (cur->type == XML_RELAXNG_EMPTY) {
6155                 if ((parent != NULL) &&
6156                     ((parent->type == XML_RELAXNG_ONEORMORE) ||
6157                      (parent->type == XML_RELAXNG_ZEROORMORE))) {
6158                     parent->type = XML_RELAXNG_EMPTY;
6159                     break;
6160                 }
6161                 if ((parent != NULL) &&
6162                     ((parent->type == XML_RELAXNG_GROUP) ||
6163                      (parent->type == XML_RELAXNG_INTERLEAVE) ||
6164                      (parent->type == XML_RELAXNG_CHOICE))) {
6165                     prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
6166                 } else
6167                     prev = cur;
6168             } else {
6169                 prev = cur;
6170             }
6171         }
6172         cur = cur->next;
6173     }
6174 }
6175 
6176 /**
6177  * xmlRelaxNGGroupContentType:
6178  * @ct1:  the first content type
6179  * @ct2:  the second content type
6180  *
6181  * Try to group 2 content types
6182  *
6183  * Returns the content type
6184  */
6185 static xmlRelaxNGContentType
xmlRelaxNGGroupContentType(xmlRelaxNGContentType ct1,xmlRelaxNGContentType ct2)6186 xmlRelaxNGGroupContentType(xmlRelaxNGContentType ct1,
6187                            xmlRelaxNGContentType ct2)
6188 {
6189     if ((ct1 == XML_RELAXNG_CONTENT_ERROR) ||
6190         (ct2 == XML_RELAXNG_CONTENT_ERROR))
6191         return (XML_RELAXNG_CONTENT_ERROR);
6192     if (ct1 == XML_RELAXNG_CONTENT_EMPTY)
6193         return (ct2);
6194     if (ct2 == XML_RELAXNG_CONTENT_EMPTY)
6195         return (ct1);
6196     if ((ct1 == XML_RELAXNG_CONTENT_COMPLEX) &&
6197         (ct2 == XML_RELAXNG_CONTENT_COMPLEX))
6198         return (XML_RELAXNG_CONTENT_COMPLEX);
6199     return (XML_RELAXNG_CONTENT_ERROR);
6200 }
6201 
6202 /**
6203  * xmlRelaxNGMaxContentType:
6204  * @ct1:  the first content type
6205  * @ct2:  the second content type
6206  *
6207  * Compute the max content-type
6208  *
6209  * Returns the content type
6210  */
6211 static xmlRelaxNGContentType
xmlRelaxNGMaxContentType(xmlRelaxNGContentType ct1,xmlRelaxNGContentType ct2)6212 xmlRelaxNGMaxContentType(xmlRelaxNGContentType ct1,
6213                          xmlRelaxNGContentType ct2)
6214 {
6215     if ((ct1 == XML_RELAXNG_CONTENT_ERROR) ||
6216         (ct2 == XML_RELAXNG_CONTENT_ERROR))
6217         return (XML_RELAXNG_CONTENT_ERROR);
6218     if ((ct1 == XML_RELAXNG_CONTENT_SIMPLE) ||
6219         (ct2 == XML_RELAXNG_CONTENT_SIMPLE))
6220         return (XML_RELAXNG_CONTENT_SIMPLE);
6221     if ((ct1 == XML_RELAXNG_CONTENT_COMPLEX) ||
6222         (ct2 == XML_RELAXNG_CONTENT_COMPLEX))
6223         return (XML_RELAXNG_CONTENT_COMPLEX);
6224     return (XML_RELAXNG_CONTENT_EMPTY);
6225 }
6226 
6227 /**
6228  * xmlRelaxNGCheckRules:
6229  * @ctxt:  a Relax-NG parser context
6230  * @cur:  the current definition
6231  * @flags:  some accumulated flags
6232  * @ptype:  the parent type
6233  *
6234  * Check for rules in section 7.1 and 7.2
6235  *
6236  * Returns the content type of @cur
6237  */
6238 static xmlRelaxNGContentType
xmlRelaxNGCheckRules(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGDefinePtr cur,int flags,xmlRelaxNGType ptype)6239 xmlRelaxNGCheckRules(xmlRelaxNGParserCtxtPtr ctxt,
6240                      xmlRelaxNGDefinePtr cur, int flags,
6241                      xmlRelaxNGType ptype)
6242 {
6243     int nflags;
6244     xmlRelaxNGContentType ret, tmp, val = XML_RELAXNG_CONTENT_EMPTY;
6245 
6246     while (cur != NULL) {
6247         ret = XML_RELAXNG_CONTENT_EMPTY;
6248         if ((cur->type == XML_RELAXNG_REF) ||
6249             (cur->type == XML_RELAXNG_PARENTREF)) {
6250            /*
6251             * This should actually be caught by list//element(ref) at the
6252             * element boundaries, c.f. Bug #159968 local refs are dropped
6253             * in step 4.19.
6254             */
6255 #if 0
6256             if (flags & XML_RELAXNG_IN_LIST) {
6257                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_REF,
6258                            "Found forbidden pattern list//ref\n", NULL,
6259                            NULL);
6260             }
6261 #endif
6262             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6263                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_REF,
6264                            "Found forbidden pattern data/except//ref\n",
6265                            NULL, NULL);
6266             }
6267             if (cur->content == NULL) {
6268                 if (cur->type == XML_RELAXNG_PARENTREF)
6269                     xmlRngPErr(ctxt, cur->node, XML_RNGP_REF_NO_DEF,
6270                                "Internal found no define for parent refs\n",
6271                                NULL, NULL);
6272                 else
6273                     xmlRngPErr(ctxt, cur->node, XML_RNGP_REF_NO_DEF,
6274                                "Internal found no define for ref %s\n",
6275                                (cur->name ? cur->name: BAD_CAST "null"), NULL);
6276             }
6277             if (cur->depth > -4) {
6278                 cur->depth = -4;
6279                 ret = xmlRelaxNGCheckRules(ctxt, cur->content,
6280                                            flags, cur->type);
6281                 cur->depth = ret - 15;
6282             } else if (cur->depth == -4) {
6283                 ret = XML_RELAXNG_CONTENT_COMPLEX;
6284             } else {
6285                 ret = (xmlRelaxNGContentType) (cur->depth + 15);
6286             }
6287         } else if (cur->type == XML_RELAXNG_ELEMENT) {
6288             /*
6289              * The 7.3 Attribute derivation rule for groups is plugged there
6290              */
6291             xmlRelaxNGCheckGroupAttrs(ctxt, cur);
6292             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6293                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_ELEM,
6294                            "Found forbidden pattern data/except//element(ref)\n",
6295                            NULL, NULL);
6296             }
6297             if (flags & XML_RELAXNG_IN_LIST) {
6298                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_ELEM,
6299                            "Found forbidden pattern list//element(ref)\n",
6300                            NULL, NULL);
6301             }
6302             if (flags & XML_RELAXNG_IN_ATTRIBUTE) {
6303                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ATTR_ELEM,
6304                            "Found forbidden pattern attribute//element(ref)\n",
6305                            NULL, NULL);
6306             }
6307             if (flags & XML_RELAXNG_IN_ATTRIBUTE) {
6308                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ATTR_ELEM,
6309                            "Found forbidden pattern attribute//element(ref)\n",
6310                            NULL, NULL);
6311             }
6312             /*
6313              * reset since in the simple form elements are only child
6314              * of grammar/define
6315              */
6316             nflags = 0;
6317             ret =
6318                 xmlRelaxNGCheckRules(ctxt, cur->attrs, nflags, cur->type);
6319             if (ret != XML_RELAXNG_CONTENT_EMPTY) {
6320                 xmlRngPErr(ctxt, cur->node, XML_RNGP_ELEM_CONTENT_EMPTY,
6321                            "Element %s attributes have a content type error\n",
6322                            cur->name, NULL);
6323             }
6324             ret =
6325                 xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
6326                                      cur->type);
6327             if (ret == XML_RELAXNG_CONTENT_ERROR) {
6328                 xmlRngPErr(ctxt, cur->node, XML_RNGP_ELEM_CONTENT_ERROR,
6329                            "Element %s has a content type error\n",
6330                            cur->name, NULL);
6331             } else {
6332                 ret = XML_RELAXNG_CONTENT_COMPLEX;
6333             }
6334         } else if (cur->type == XML_RELAXNG_ATTRIBUTE) {
6335             if (flags & XML_RELAXNG_IN_ATTRIBUTE) {
6336                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ATTR_ATTR,
6337                            "Found forbidden pattern attribute//attribute\n",
6338                            NULL, NULL);
6339             }
6340             if (flags & XML_RELAXNG_IN_LIST) {
6341                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_ATTR,
6342                            "Found forbidden pattern list//attribute\n",
6343                            NULL, NULL);
6344             }
6345             if (flags & XML_RELAXNG_IN_OOMGROUP) {
6346                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ONEMORE_GROUP_ATTR,
6347                            "Found forbidden pattern oneOrMore//group//attribute\n",
6348                            NULL, NULL);
6349             }
6350             if (flags & XML_RELAXNG_IN_OOMINTERLEAVE) {
6351                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ONEMORE_INTERLEAVE_ATTR,
6352                            "Found forbidden pattern oneOrMore//interleave//attribute\n",
6353                            NULL, NULL);
6354             }
6355             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6356                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_ATTR,
6357                            "Found forbidden pattern data/except//attribute\n",
6358                            NULL, NULL);
6359             }
6360             if (flags & XML_RELAXNG_IN_START) {
6361                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_ATTR,
6362                            "Found forbidden pattern start//attribute\n",
6363                            NULL, NULL);
6364             }
6365             if ((!(flags & XML_RELAXNG_IN_ONEORMORE))
6366                 && (cur->name == NULL)) {
6367                 if (cur->ns == NULL) {
6368                     xmlRngPErr(ctxt, cur->node, XML_RNGP_ANYNAME_ATTR_ANCESTOR,
6369                                "Found anyName attribute without oneOrMore ancestor\n",
6370                                NULL, NULL);
6371                 } else {
6372                     xmlRngPErr(ctxt, cur->node, XML_RNGP_NSNAME_ATTR_ANCESTOR,
6373                                "Found nsName attribute without oneOrMore ancestor\n",
6374                                NULL, NULL);
6375                 }
6376             }
6377             nflags = flags | XML_RELAXNG_IN_ATTRIBUTE;
6378             xmlRelaxNGCheckRules(ctxt, cur->content, nflags, cur->type);
6379             ret = XML_RELAXNG_CONTENT_EMPTY;
6380         } else if ((cur->type == XML_RELAXNG_ONEORMORE) ||
6381                    (cur->type == XML_RELAXNG_ZEROORMORE)) {
6382             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6383                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_ONEMORE,
6384                            "Found forbidden pattern data/except//oneOrMore\n",
6385                            NULL, NULL);
6386             }
6387             if (flags & XML_RELAXNG_IN_START) {
6388                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_ONEMORE,
6389                            "Found forbidden pattern start//oneOrMore\n",
6390                            NULL, NULL);
6391             }
6392             nflags = flags | XML_RELAXNG_IN_ONEORMORE;
6393             ret =
6394                 xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
6395                                      cur->type);
6396             ret = xmlRelaxNGGroupContentType(ret, ret);
6397         } else if (cur->type == XML_RELAXNG_LIST) {
6398             if (flags & XML_RELAXNG_IN_LIST) {
6399                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_LIST,
6400                            "Found forbidden pattern list//list\n", NULL,
6401                            NULL);
6402             }
6403             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6404                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_LIST,
6405                            "Found forbidden pattern data/except//list\n",
6406                            NULL, NULL);
6407             }
6408             if (flags & XML_RELAXNG_IN_START) {
6409                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_LIST,
6410                            "Found forbidden pattern start//list\n", NULL,
6411                            NULL);
6412             }
6413             nflags = flags | XML_RELAXNG_IN_LIST;
6414             ret =
6415                 xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
6416                                      cur->type);
6417         } else if (cur->type == XML_RELAXNG_GROUP) {
6418             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6419                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_GROUP,
6420                            "Found forbidden pattern data/except//group\n",
6421                            NULL, NULL);
6422             }
6423             if (flags & XML_RELAXNG_IN_START) {
6424                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_GROUP,
6425                            "Found forbidden pattern start//group\n", NULL,
6426                            NULL);
6427             }
6428             if (flags & XML_RELAXNG_IN_ONEORMORE)
6429                 nflags = flags | XML_RELAXNG_IN_OOMGROUP;
6430             else
6431                 nflags = flags;
6432             ret =
6433                 xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
6434                                      cur->type);
6435             /*
6436              * The 7.3 Attribute derivation rule for groups is plugged there
6437              */
6438             xmlRelaxNGCheckGroupAttrs(ctxt, cur);
6439         } else if (cur->type == XML_RELAXNG_INTERLEAVE) {
6440             if (flags & XML_RELAXNG_IN_LIST) {
6441                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_INTERLEAVE,
6442                            "Found forbidden pattern list//interleave\n",
6443                            NULL, NULL);
6444             }
6445             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6446                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_INTERLEAVE,
6447                            "Found forbidden pattern data/except//interleave\n",
6448                            NULL, NULL);
6449             }
6450             if (flags & XML_RELAXNG_IN_START) {
6451                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_INTERLEAVE,
6452                            "Found forbidden pattern start//interleave\n",
6453                            NULL, NULL);
6454             }
6455             if (flags & XML_RELAXNG_IN_ONEORMORE)
6456                 nflags = flags | XML_RELAXNG_IN_OOMINTERLEAVE;
6457             else
6458                 nflags = flags;
6459             ret =
6460                 xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
6461                                      cur->type);
6462         } else if (cur->type == XML_RELAXNG_EXCEPT) {
6463             if ((cur->parent != NULL) &&
6464                 (cur->parent->type == XML_RELAXNG_DATATYPE))
6465                 nflags = flags | XML_RELAXNG_IN_DATAEXCEPT;
6466             else
6467                 nflags = flags;
6468             ret =
6469                 xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
6470                                      cur->type);
6471         } else if (cur->type == XML_RELAXNG_DATATYPE) {
6472             if (flags & XML_RELAXNG_IN_START) {
6473                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_DATA,
6474                            "Found forbidden pattern start//data\n", NULL,
6475                            NULL);
6476             }
6477             xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
6478             ret = XML_RELAXNG_CONTENT_SIMPLE;
6479         } else if (cur->type == XML_RELAXNG_VALUE) {
6480             if (flags & XML_RELAXNG_IN_START) {
6481                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_VALUE,
6482                            "Found forbidden pattern start//value\n", NULL,
6483                            NULL);
6484             }
6485             xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
6486             ret = XML_RELAXNG_CONTENT_SIMPLE;
6487         } else if (cur->type == XML_RELAXNG_TEXT) {
6488             if (flags & XML_RELAXNG_IN_LIST) {
6489                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_TEXT,
6490                            "Found forbidden pattern list//text\n", NULL,
6491                            NULL);
6492             }
6493             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6494                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_TEXT,
6495                            "Found forbidden pattern data/except//text\n",
6496                            NULL, NULL);
6497             }
6498             if (flags & XML_RELAXNG_IN_START) {
6499                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_TEXT,
6500                            "Found forbidden pattern start//text\n", NULL,
6501                            NULL);
6502             }
6503             ret = XML_RELAXNG_CONTENT_COMPLEX;
6504         } else if (cur->type == XML_RELAXNG_EMPTY) {
6505             if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
6506                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_EMPTY,
6507                            "Found forbidden pattern data/except//empty\n",
6508                            NULL, NULL);
6509             }
6510             if (flags & XML_RELAXNG_IN_START) {
6511                 xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_EMPTY,
6512                            "Found forbidden pattern start//empty\n", NULL,
6513                            NULL);
6514             }
6515             ret = XML_RELAXNG_CONTENT_EMPTY;
6516         } else if (cur->type == XML_RELAXNG_CHOICE) {
6517             xmlRelaxNGCheckChoiceDeterminism(ctxt, cur);
6518             ret =
6519                 xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
6520         } else {
6521             ret =
6522                 xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
6523         }
6524         cur = cur->next;
6525         if (ptype == XML_RELAXNG_GROUP) {
6526             val = xmlRelaxNGGroupContentType(val, ret);
6527         } else if (ptype == XML_RELAXNG_INTERLEAVE) {
6528             /*
6529              * TODO: scan complain that tmp is never used, seems on purpose
6530              *       need double-checking
6531              */
6532             tmp = xmlRelaxNGGroupContentType(val, ret);
6533             if (tmp != XML_RELAXNG_CONTENT_ERROR)
6534                 tmp = xmlRelaxNGMaxContentType(val, ret);
6535         } else if (ptype == XML_RELAXNG_CHOICE) {
6536             val = xmlRelaxNGMaxContentType(val, ret);
6537         } else if (ptype == XML_RELAXNG_LIST) {
6538             val = XML_RELAXNG_CONTENT_SIMPLE;
6539         } else if (ptype == XML_RELAXNG_EXCEPT) {
6540             if (ret == XML_RELAXNG_CONTENT_ERROR)
6541                 val = XML_RELAXNG_CONTENT_ERROR;
6542             else
6543                 val = XML_RELAXNG_CONTENT_SIMPLE;
6544         } else {
6545             val = xmlRelaxNGGroupContentType(val, ret);
6546         }
6547 
6548     }
6549     return (val);
6550 }
6551 
6552 /**
6553  * xmlRelaxNGParseGrammar:
6554  * @ctxt:  a Relax-NG parser context
6555  * @nodes:  grammar children nodes
6556  *
6557  * parse a Relax-NG <grammar> node
6558  *
6559  * Returns the internal xmlRelaxNGGrammarPtr built or
6560  *         NULL in case of error
6561  */
6562 static xmlRelaxNGGrammarPtr
xmlRelaxNGParseGrammar(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr nodes)6563 xmlRelaxNGParseGrammar(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr nodes)
6564 {
6565     xmlRelaxNGGrammarPtr ret, tmp, old;
6566 
6567 #ifdef DEBUG_GRAMMAR
6568     xmlGenericError(xmlGenericErrorContext, "Parsing a new grammar\n");
6569 #endif
6570 
6571     ret = xmlRelaxNGNewGrammar(ctxt);
6572     if (ret == NULL)
6573         return (NULL);
6574 
6575     /*
6576      * Link the new grammar in the tree
6577      */
6578     ret->parent = ctxt->grammar;
6579     if (ctxt->grammar != NULL) {
6580         tmp = ctxt->grammar->children;
6581         if (tmp == NULL) {
6582             ctxt->grammar->children = ret;
6583         } else {
6584             while (tmp->next != NULL)
6585                 tmp = tmp->next;
6586             tmp->next = ret;
6587         }
6588     }
6589 
6590     old = ctxt->grammar;
6591     ctxt->grammar = ret;
6592     xmlRelaxNGParseGrammarContent(ctxt, nodes);
6593     ctxt->grammar = ret;
6594     if (ctxt->grammar == NULL) {
6595         xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_CONTENT,
6596                    "Failed to parse <grammar> content\n", NULL, NULL);
6597     } else if (ctxt->grammar->start == NULL) {
6598         xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_NO_START,
6599                    "Element <grammar> has no <start>\n", NULL, NULL);
6600     }
6601 
6602     /*
6603      * Apply 4.17 merging rules to defines and starts
6604      */
6605     xmlRelaxNGCombineStart(ctxt, ret);
6606     if (ret->defs != NULL) {
6607         xmlHashScan(ret->defs, (xmlHashScanner) xmlRelaxNGCheckCombine,
6608                     ctxt);
6609     }
6610 
6611     /*
6612      * link together defines and refs in this grammar
6613      */
6614     if (ret->refs != NULL) {
6615         xmlHashScan(ret->refs, (xmlHashScanner) xmlRelaxNGCheckReference,
6616                     ctxt);
6617     }
6618 
6619 
6620     /* @@@@ */
6621 
6622     ctxt->grammar = old;
6623     return (ret);
6624 }
6625 
6626 /**
6627  * xmlRelaxNGParseDocument:
6628  * @ctxt:  a Relax-NG parser context
6629  * @node:  the root node of the RelaxNG schema
6630  *
6631  * parse a Relax-NG definition resource and build an internal
6632  * xmlRelaxNG struture which can be used to validate instances.
6633  *
6634  * Returns the internal XML RelaxNG structure built or
6635  *         NULL in case of error
6636  */
6637 static xmlRelaxNGPtr
xmlRelaxNGParseDocument(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)6638 xmlRelaxNGParseDocument(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
6639 {
6640     xmlRelaxNGPtr schema = NULL;
6641     const xmlChar *olddefine;
6642     xmlRelaxNGGrammarPtr old;
6643 
6644     if ((ctxt == NULL) || (node == NULL))
6645         return (NULL);
6646 
6647     schema = xmlRelaxNGNewRelaxNG(ctxt);
6648     if (schema == NULL)
6649         return (NULL);
6650 
6651     olddefine = ctxt->define;
6652     ctxt->define = NULL;
6653     if (IS_RELAXNG(node, "grammar")) {
6654         schema->topgrammar = xmlRelaxNGParseGrammar(ctxt, node->children);
6655         if (schema->topgrammar == NULL) {
6656             xmlRelaxNGFree(schema);
6657             return (NULL);
6658         }
6659     } else {
6660         xmlRelaxNGGrammarPtr tmp, ret;
6661 
6662         schema->topgrammar = ret = xmlRelaxNGNewGrammar(ctxt);
6663         if (schema->topgrammar == NULL) {
6664             xmlRelaxNGFree(schema);
6665             return (NULL);
6666         }
6667         /*
6668          * Link the new grammar in the tree
6669          */
6670         ret->parent = ctxt->grammar;
6671         if (ctxt->grammar != NULL) {
6672             tmp = ctxt->grammar->children;
6673             if (tmp == NULL) {
6674                 ctxt->grammar->children = ret;
6675             } else {
6676                 while (tmp->next != NULL)
6677                     tmp = tmp->next;
6678                 tmp->next = ret;
6679             }
6680         }
6681         old = ctxt->grammar;
6682         ctxt->grammar = ret;
6683         xmlRelaxNGParseStart(ctxt, node);
6684         if (old != NULL)
6685             ctxt->grammar = old;
6686     }
6687     ctxt->define = olddefine;
6688     if (schema->topgrammar->start != NULL) {
6689         xmlRelaxNGCheckCycles(ctxt, schema->topgrammar->start, 0);
6690         if ((ctxt->flags & XML_RELAXNG_IN_EXTERNALREF) == 0) {
6691             xmlRelaxNGSimplify(ctxt, schema->topgrammar->start, NULL);
6692             while ((schema->topgrammar->start != NULL) &&
6693                    (schema->topgrammar->start->type == XML_RELAXNG_NOOP) &&
6694                    (schema->topgrammar->start->next != NULL))
6695                 schema->topgrammar->start =
6696                     schema->topgrammar->start->content;
6697             xmlRelaxNGCheckRules(ctxt, schema->topgrammar->start,
6698                                  XML_RELAXNG_IN_START, XML_RELAXNG_NOOP);
6699         }
6700     }
6701 #ifdef DEBUG
6702     if (schema == NULL)
6703         xmlGenericError(xmlGenericErrorContext,
6704                         "xmlRelaxNGParseDocument() failed\n");
6705 #endif
6706 
6707     return (schema);
6708 }
6709 
6710 /************************************************************************
6711  *									*
6712  *			Reading RelaxNGs				*
6713  *									*
6714  ************************************************************************/
6715 
6716 /**
6717  * xmlRelaxNGNewParserCtxt:
6718  * @URL:  the location of the schema
6719  *
6720  * Create an XML RelaxNGs parse context for that file/resource expected
6721  * to contain an XML RelaxNGs file.
6722  *
6723  * Returns the parser context or NULL in case of error
6724  */
6725 xmlRelaxNGParserCtxtPtr
xmlRelaxNGNewParserCtxt(const char * URL)6726 xmlRelaxNGNewParserCtxt(const char *URL)
6727 {
6728     xmlRelaxNGParserCtxtPtr ret;
6729 
6730     if (URL == NULL)
6731         return (NULL);
6732 
6733     ret =
6734         (xmlRelaxNGParserCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGParserCtxt));
6735     if (ret == NULL) {
6736         xmlRngPErrMemory(NULL, "building parser\n");
6737         return (NULL);
6738     }
6739     memset(ret, 0, sizeof(xmlRelaxNGParserCtxt));
6740     ret->URL = xmlStrdup((const xmlChar *) URL);
6741     ret->error = xmlGenericError;
6742     ret->userData = xmlGenericErrorContext;
6743     return (ret);
6744 }
6745 
6746 /**
6747  * xmlRelaxNGNewMemParserCtxt:
6748  * @buffer:  a pointer to a char array containing the schemas
6749  * @size:  the size of the array
6750  *
6751  * Create an XML RelaxNGs parse context for that memory buffer expected
6752  * to contain an XML RelaxNGs file.
6753  *
6754  * Returns the parser context or NULL in case of error
6755  */
6756 xmlRelaxNGParserCtxtPtr
xmlRelaxNGNewMemParserCtxt(const char * buffer,int size)6757 xmlRelaxNGNewMemParserCtxt(const char *buffer, int size)
6758 {
6759     xmlRelaxNGParserCtxtPtr ret;
6760 
6761     if ((buffer == NULL) || (size <= 0))
6762         return (NULL);
6763 
6764     ret =
6765         (xmlRelaxNGParserCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGParserCtxt));
6766     if (ret == NULL) {
6767         xmlRngPErrMemory(NULL, "building parser\n");
6768         return (NULL);
6769     }
6770     memset(ret, 0, sizeof(xmlRelaxNGParserCtxt));
6771     ret->buffer = buffer;
6772     ret->size = size;
6773     ret->error = xmlGenericError;
6774     ret->userData = xmlGenericErrorContext;
6775     return (ret);
6776 }
6777 
6778 /**
6779  * xmlRelaxNGNewDocParserCtxt:
6780  * @doc:  a preparsed document tree
6781  *
6782  * Create an XML RelaxNGs parser context for that document.
6783  * Note: since the process of compiling a RelaxNG schemas modifies the
6784  *       document, the @doc parameter is duplicated internally.
6785  *
6786  * Returns the parser context or NULL in case of error
6787  */
6788 xmlRelaxNGParserCtxtPtr
xmlRelaxNGNewDocParserCtxt(xmlDocPtr doc)6789 xmlRelaxNGNewDocParserCtxt(xmlDocPtr doc)
6790 {
6791     xmlRelaxNGParserCtxtPtr ret;
6792     xmlDocPtr copy;
6793 
6794     if (doc == NULL)
6795         return (NULL);
6796     copy = xmlCopyDoc(doc, 1);
6797     if (copy == NULL)
6798         return (NULL);
6799 
6800     ret =
6801         (xmlRelaxNGParserCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGParserCtxt));
6802     if (ret == NULL) {
6803         xmlRngPErrMemory(NULL, "building parser\n");
6804         return (NULL);
6805     }
6806     memset(ret, 0, sizeof(xmlRelaxNGParserCtxt));
6807     ret->document = copy;
6808     ret->freedoc = 1;
6809     ret->userData = xmlGenericErrorContext;
6810     return (ret);
6811 }
6812 
6813 /**
6814  * xmlRelaxNGFreeParserCtxt:
6815  * @ctxt:  the schema parser context
6816  *
6817  * Free the resources associated to the schema parser context
6818  */
6819 void
xmlRelaxNGFreeParserCtxt(xmlRelaxNGParserCtxtPtr ctxt)6820 xmlRelaxNGFreeParserCtxt(xmlRelaxNGParserCtxtPtr ctxt)
6821 {
6822     if (ctxt == NULL)
6823         return;
6824     if (ctxt->URL != NULL)
6825         xmlFree(ctxt->URL);
6826     if (ctxt->doc != NULL)
6827         xmlRelaxNGFreeDocument(ctxt->doc);
6828     if (ctxt->interleaves != NULL)
6829         xmlHashFree(ctxt->interleaves, NULL);
6830     if (ctxt->documents != NULL)
6831         xmlRelaxNGFreeDocumentList(ctxt->documents);
6832     if (ctxt->includes != NULL)
6833         xmlRelaxNGFreeIncludeList(ctxt->includes);
6834     if (ctxt->docTab != NULL)
6835         xmlFree(ctxt->docTab);
6836     if (ctxt->incTab != NULL)
6837         xmlFree(ctxt->incTab);
6838     if (ctxt->defTab != NULL) {
6839         int i;
6840 
6841         for (i = 0; i < ctxt->defNr; i++)
6842             xmlRelaxNGFreeDefine(ctxt->defTab[i]);
6843         xmlFree(ctxt->defTab);
6844     }
6845     if ((ctxt->document != NULL) && (ctxt->freedoc))
6846         xmlFreeDoc(ctxt->document);
6847     xmlFree(ctxt);
6848 }
6849 
6850 /**
6851  * xmlRelaxNGNormExtSpace:
6852  * @value:  a value
6853  *
6854  * Removes the leading and ending spaces of the value
6855  * The string is modified "in situ"
6856  */
6857 static void
xmlRelaxNGNormExtSpace(xmlChar * value)6858 xmlRelaxNGNormExtSpace(xmlChar * value)
6859 {
6860     xmlChar *start = value;
6861     xmlChar *cur = value;
6862 
6863     if (value == NULL)
6864         return;
6865 
6866     while (IS_BLANK_CH(*cur))
6867         cur++;
6868     if (cur == start) {
6869         do {
6870             while ((*cur != 0) && (!IS_BLANK_CH(*cur)))
6871                 cur++;
6872             if (*cur == 0)
6873                 return;
6874             start = cur;
6875             while (IS_BLANK_CH(*cur))
6876                 cur++;
6877             if (*cur == 0) {
6878                 *start = 0;
6879                 return;
6880             }
6881         } while (1);
6882     } else {
6883         do {
6884             while ((*cur != 0) && (!IS_BLANK_CH(*cur)))
6885                 *start++ = *cur++;
6886             if (*cur == 0) {
6887                 *start = 0;
6888                 return;
6889             }
6890             /* don't try to normalize the inner spaces */
6891             while (IS_BLANK_CH(*cur))
6892                 cur++;
6893             if (*cur == 0) {
6894                 *start = 0;
6895                 return;
6896             }
6897             *start++ = *cur++;
6898         } while (1);
6899     }
6900 }
6901 
6902 /**
6903  * xmlRelaxNGCleanupAttributes:
6904  * @ctxt:  a Relax-NG parser context
6905  * @node:  a Relax-NG node
6906  *
6907  * Check all the attributes on the given node
6908  */
6909 static void
xmlRelaxNGCleanupAttributes(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr node)6910 xmlRelaxNGCleanupAttributes(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
6911 {
6912     xmlAttrPtr cur, next;
6913 
6914     cur = node->properties;
6915     while (cur != NULL) {
6916         next = cur->next;
6917         if ((cur->ns == NULL) ||
6918             (xmlStrEqual(cur->ns->href, xmlRelaxNGNs))) {
6919             if (xmlStrEqual(cur->name, BAD_CAST "name")) {
6920                 if ((!xmlStrEqual(node->name, BAD_CAST "element")) &&
6921                     (!xmlStrEqual(node->name, BAD_CAST "attribute")) &&
6922                     (!xmlStrEqual(node->name, BAD_CAST "ref")) &&
6923                     (!xmlStrEqual(node->name, BAD_CAST "parentRef")) &&
6924                     (!xmlStrEqual(node->name, BAD_CAST "param")) &&
6925                     (!xmlStrEqual(node->name, BAD_CAST "define"))) {
6926                     xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
6927                                "Attribute %s is not allowed on %s\n",
6928                                cur->name, node->name);
6929                 }
6930             } else if (xmlStrEqual(cur->name, BAD_CAST "type")) {
6931                 if ((!xmlStrEqual(node->name, BAD_CAST "value")) &&
6932                     (!xmlStrEqual(node->name, BAD_CAST "data"))) {
6933                     xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
6934                                "Attribute %s is not allowed on %s\n",
6935                                cur->name, node->name);
6936                 }
6937             } else if (xmlStrEqual(cur->name, BAD_CAST "href")) {
6938                 if ((!xmlStrEqual(node->name, BAD_CAST "externalRef")) &&
6939                     (!xmlStrEqual(node->name, BAD_CAST "include"))) {
6940                     xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
6941                                "Attribute %s is not allowed on %s\n",
6942                                cur->name, node->name);
6943                 }
6944             } else if (xmlStrEqual(cur->name, BAD_CAST "combine")) {
6945                 if ((!xmlStrEqual(node->name, BAD_CAST "start")) &&
6946                     (!xmlStrEqual(node->name, BAD_CAST "define"))) {
6947                     xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
6948                                "Attribute %s is not allowed on %s\n",
6949                                cur->name, node->name);
6950                 }
6951             } else if (xmlStrEqual(cur->name, BAD_CAST "datatypeLibrary")) {
6952                 xmlChar *val;
6953                 xmlURIPtr uri;
6954 
6955                 val = xmlNodeListGetString(node->doc, cur->children, 1);
6956                 if (val != NULL) {
6957                     if (val[0] != 0) {
6958                         uri = xmlParseURI((const char *) val);
6959                         if (uri == NULL) {
6960                             xmlRngPErr(ctxt, node, XML_RNGP_INVALID_URI,
6961                                        "Attribute %s contains invalid URI %s\n",
6962                                        cur->name, val);
6963                         } else {
6964                             if (uri->scheme == NULL) {
6965                                 xmlRngPErr(ctxt, node, XML_RNGP_URI_NOT_ABSOLUTE,
6966                                            "Attribute %s URI %s is not absolute\n",
6967                                            cur->name, val);
6968                             }
6969                             if (uri->fragment != NULL) {
6970                                 xmlRngPErr(ctxt, node, XML_RNGP_URI_FRAGMENT,
6971                                            "Attribute %s URI %s has a fragment ID\n",
6972                                            cur->name, val);
6973                             }
6974                             xmlFreeURI(uri);
6975                         }
6976                     }
6977                     xmlFree(val);
6978                 }
6979             } else if (!xmlStrEqual(cur->name, BAD_CAST "ns")) {
6980                 xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_ATTRIBUTE,
6981                            "Unknown attribute %s on %s\n", cur->name,
6982                            node->name);
6983             }
6984         }
6985         cur = next;
6986     }
6987 }
6988 
6989 /**
6990  * xmlRelaxNGCleanupTree:
6991  * @ctxt:  a Relax-NG parser context
6992  * @root:  an xmlNodePtr subtree
6993  *
6994  * Cleanup the subtree from unwanted nodes for parsing, resolve
6995  * Include and externalRef lookups.
6996  */
6997 static void
xmlRelaxNGCleanupTree(xmlRelaxNGParserCtxtPtr ctxt,xmlNodePtr root)6998 xmlRelaxNGCleanupTree(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr root)
6999 {
7000     xmlNodePtr cur, delete;
7001 
7002     delete = NULL;
7003     cur = root;
7004     while (cur != NULL) {
7005         if (delete != NULL) {
7006             xmlUnlinkNode(delete);
7007             xmlFreeNode(delete);
7008             delete = NULL;
7009         }
7010         if (cur->type == XML_ELEMENT_NODE) {
7011             /*
7012              * Simplification 4.1. Annotations
7013              */
7014             if ((cur->ns == NULL) ||
7015                 (!xmlStrEqual(cur->ns->href, xmlRelaxNGNs))) {
7016                 if ((cur->parent != NULL) &&
7017                     (cur->parent->type == XML_ELEMENT_NODE) &&
7018                     ((xmlStrEqual(cur->parent->name, BAD_CAST "name")) ||
7019                      (xmlStrEqual(cur->parent->name, BAD_CAST "value")) ||
7020                      (xmlStrEqual(cur->parent->name, BAD_CAST "param")))) {
7021                     xmlRngPErr(ctxt, cur, XML_RNGP_FOREIGN_ELEMENT,
7022                                "element %s doesn't allow foreign elements\n",
7023                                cur->parent->name, NULL);
7024                 }
7025                 delete = cur;
7026                 goto skip_children;
7027             } else {
7028                 xmlRelaxNGCleanupAttributes(ctxt, cur);
7029                 if (xmlStrEqual(cur->name, BAD_CAST "externalRef")) {
7030                     xmlChar *href, *ns, *base, *URL;
7031                     xmlRelaxNGDocumentPtr docu;
7032                     xmlNodePtr tmp;
7033 		    xmlURIPtr uri;
7034 
7035                     ns = xmlGetProp(cur, BAD_CAST "ns");
7036                     if (ns == NULL) {
7037                         tmp = cur->parent;
7038                         while ((tmp != NULL) &&
7039                                (tmp->type == XML_ELEMENT_NODE)) {
7040                             ns = xmlGetProp(tmp, BAD_CAST "ns");
7041                             if (ns != NULL)
7042                                 break;
7043                             tmp = tmp->parent;
7044                         }
7045                     }
7046                     href = xmlGetProp(cur, BAD_CAST "href");
7047                     if (href == NULL) {
7048                         xmlRngPErr(ctxt, cur, XML_RNGP_MISSING_HREF,
7049                                    "xmlRelaxNGParse: externalRef has no href attribute\n",
7050                                    NULL, NULL);
7051                         if (ns != NULL)
7052                             xmlFree(ns);
7053                         delete = cur;
7054                         goto skip_children;
7055                     }
7056 		    uri = xmlParseURI((const char *) href);
7057 		    if (uri == NULL) {
7058                         xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
7059                                    "Incorrect URI for externalRef %s\n",
7060                                    href, NULL);
7061                         if (ns != NULL)
7062                             xmlFree(ns);
7063                         if (href != NULL)
7064                             xmlFree(href);
7065                         delete = cur;
7066                         goto skip_children;
7067 		    }
7068 		    if (uri->fragment != NULL) {
7069                         xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
7070 			       "Fragment forbidden in URI for externalRef %s\n",
7071                                    href, NULL);
7072                         if (ns != NULL)
7073                             xmlFree(ns);
7074 		        xmlFreeURI(uri);
7075                         if (href != NULL)
7076                             xmlFree(href);
7077                         delete = cur;
7078                         goto skip_children;
7079 		    }
7080 		    xmlFreeURI(uri);
7081                     base = xmlNodeGetBase(cur->doc, cur);
7082                     URL = xmlBuildURI(href, base);
7083                     if (URL == NULL) {
7084                         xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
7085                                    "Failed to compute URL for externalRef %s\n",
7086                                    href, NULL);
7087                         if (ns != NULL)
7088                             xmlFree(ns);
7089                         if (href != NULL)
7090                             xmlFree(href);
7091                         if (base != NULL)
7092                             xmlFree(base);
7093                         delete = cur;
7094                         goto skip_children;
7095                     }
7096                     if (href != NULL)
7097                         xmlFree(href);
7098                     if (base != NULL)
7099                         xmlFree(base);
7100                     docu = xmlRelaxNGLoadExternalRef(ctxt, URL, ns);
7101                     if (docu == NULL) {
7102                         xmlRngPErr(ctxt, cur, XML_RNGP_EXTERNAL_REF_FAILURE,
7103                                    "Failed to load externalRef %s\n", URL,
7104                                    NULL);
7105                         if (ns != NULL)
7106                             xmlFree(ns);
7107                         xmlFree(URL);
7108                         delete = cur;
7109                         goto skip_children;
7110                     }
7111                     if (ns != NULL)
7112                         xmlFree(ns);
7113                     xmlFree(URL);
7114                     cur->psvi = docu;
7115                 } else if (xmlStrEqual(cur->name, BAD_CAST "include")) {
7116                     xmlChar *href, *ns, *base, *URL;
7117                     xmlRelaxNGIncludePtr incl;
7118                     xmlNodePtr tmp;
7119 
7120                     href = xmlGetProp(cur, BAD_CAST "href");
7121                     if (href == NULL) {
7122                         xmlRngPErr(ctxt, cur, XML_RNGP_MISSING_HREF,
7123                                    "xmlRelaxNGParse: include has no href attribute\n",
7124                                    NULL, NULL);
7125                         delete = cur;
7126                         goto skip_children;
7127                     }
7128                     base = xmlNodeGetBase(cur->doc, cur);
7129                     URL = xmlBuildURI(href, base);
7130                     if (URL == NULL) {
7131                         xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
7132                                    "Failed to compute URL for include %s\n",
7133                                    href, NULL);
7134                         if (href != NULL)
7135                             xmlFree(href);
7136                         if (base != NULL)
7137                             xmlFree(base);
7138                         delete = cur;
7139                         goto skip_children;
7140                     }
7141                     if (href != NULL)
7142                         xmlFree(href);
7143                     if (base != NULL)
7144                         xmlFree(base);
7145                     ns = xmlGetProp(cur, BAD_CAST "ns");
7146                     if (ns == NULL) {
7147                         tmp = cur->parent;
7148                         while ((tmp != NULL) &&
7149                                (tmp->type == XML_ELEMENT_NODE)) {
7150                             ns = xmlGetProp(tmp, BAD_CAST "ns");
7151                             if (ns != NULL)
7152                                 break;
7153                             tmp = tmp->parent;
7154                         }
7155                     }
7156                     incl = xmlRelaxNGLoadInclude(ctxt, URL, cur, ns);
7157                     if (ns != NULL)
7158                         xmlFree(ns);
7159                     if (incl == NULL) {
7160                         xmlRngPErr(ctxt, cur, XML_RNGP_INCLUDE_FAILURE,
7161                                    "Failed to load include %s\n", URL,
7162                                    NULL);
7163                         xmlFree(URL);
7164                         delete = cur;
7165                         goto skip_children;
7166                     }
7167                     xmlFree(URL);
7168                     cur->psvi = incl;
7169                 } else if ((xmlStrEqual(cur->name, BAD_CAST "element")) ||
7170                            (xmlStrEqual(cur->name, BAD_CAST "attribute")))
7171                 {
7172                     xmlChar *name, *ns;
7173                     xmlNodePtr text = NULL;
7174 
7175                     /*
7176                      * Simplification 4.8. name attribute of element
7177                      * and attribute elements
7178                      */
7179                     name = xmlGetProp(cur, BAD_CAST "name");
7180                     if (name != NULL) {
7181                         if (cur->children == NULL) {
7182                             text =
7183                                 xmlNewChild(cur, cur->ns, BAD_CAST "name",
7184                                             name);
7185                         } else {
7186                             xmlNodePtr node;
7187 
7188                             node = xmlNewDocNode(cur->doc, cur->ns,
7189 			                         BAD_CAST "name", NULL);
7190                             if (node != NULL) {
7191                                 xmlAddPrevSibling(cur->children, node);
7192                                 text = xmlNewText(name);
7193                                 xmlAddChild(node, text);
7194                                 text = node;
7195                             }
7196                         }
7197                         if (text == NULL) {
7198                             xmlRngPErr(ctxt, cur, XML_RNGP_CREATE_FAILURE,
7199                                        "Failed to create a name %s element\n",
7200                                        name, NULL);
7201                         }
7202                         xmlUnsetProp(cur, BAD_CAST "name");
7203                         xmlFree(name);
7204                         ns = xmlGetProp(cur, BAD_CAST "ns");
7205                         if (ns != NULL) {
7206                             if (text != NULL) {
7207                                 xmlSetProp(text, BAD_CAST "ns", ns);
7208                                 /* xmlUnsetProp(cur, BAD_CAST "ns"); */
7209                             }
7210                             xmlFree(ns);
7211                         } else if (xmlStrEqual(cur->name,
7212                                                BAD_CAST "attribute")) {
7213                             xmlSetProp(text, BAD_CAST "ns", BAD_CAST "");
7214                         }
7215                     }
7216                 } else if ((xmlStrEqual(cur->name, BAD_CAST "name")) ||
7217                            (xmlStrEqual(cur->name, BAD_CAST "nsName")) ||
7218                            (xmlStrEqual(cur->name, BAD_CAST "value"))) {
7219                     /*
7220                      * Simplification 4.8. name attribute of element
7221                      * and attribute elements
7222                      */
7223                     if (xmlHasProp(cur, BAD_CAST "ns") == NULL) {
7224                         xmlNodePtr node;
7225                         xmlChar *ns = NULL;
7226 
7227                         node = cur->parent;
7228                         while ((node != NULL) &&
7229                                (node->type == XML_ELEMENT_NODE)) {
7230                             ns = xmlGetProp(node, BAD_CAST "ns");
7231                             if (ns != NULL) {
7232                                 break;
7233                             }
7234                             node = node->parent;
7235                         }
7236                         if (ns == NULL) {
7237                             xmlSetProp(cur, BAD_CAST "ns", BAD_CAST "");
7238                         } else {
7239                             xmlSetProp(cur, BAD_CAST "ns", ns);
7240                             xmlFree(ns);
7241                         }
7242                     }
7243                     if (xmlStrEqual(cur->name, BAD_CAST "name")) {
7244                         xmlChar *name, *local, *prefix;
7245 
7246                         /*
7247                          * Simplification: 4.10. QNames
7248                          */
7249                         name = xmlNodeGetContent(cur);
7250                         if (name != NULL) {
7251                             local = xmlSplitQName2(name, &prefix);
7252                             if (local != NULL) {
7253                                 xmlNsPtr ns;
7254 
7255                                 ns = xmlSearchNs(cur->doc, cur, prefix);
7256                                 if (ns == NULL) {
7257                                     xmlRngPErr(ctxt, cur,
7258                                                XML_RNGP_PREFIX_UNDEFINED,
7259                                                "xmlRelaxNGParse: no namespace for prefix %s\n",
7260                                                prefix, NULL);
7261                                 } else {
7262                                     xmlSetProp(cur, BAD_CAST "ns",
7263                                                ns->href);
7264                                     xmlNodeSetContent(cur, local);
7265                                 }
7266                                 xmlFree(local);
7267                                 xmlFree(prefix);
7268                             }
7269                             xmlFree(name);
7270                         }
7271                     }
7272                     /*
7273                      * 4.16
7274                      */
7275                     if (xmlStrEqual(cur->name, BAD_CAST "nsName")) {
7276                         if (ctxt->flags & XML_RELAXNG_IN_NSEXCEPT) {
7277                             xmlRngPErr(ctxt, cur,
7278                                        XML_RNGP_PAT_NSNAME_EXCEPT_NSNAME,
7279                                        "Found nsName/except//nsName forbidden construct\n",
7280                                        NULL, NULL);
7281                         }
7282                     }
7283                 } else if ((xmlStrEqual(cur->name, BAD_CAST "except")) &&
7284                            (cur != root)) {
7285                     int oldflags = ctxt->flags;
7286 
7287                     /*
7288                      * 4.16
7289                      */
7290                     if ((cur->parent != NULL) &&
7291                         (xmlStrEqual
7292                          (cur->parent->name, BAD_CAST "anyName"))) {
7293                         ctxt->flags |= XML_RELAXNG_IN_ANYEXCEPT;
7294                         xmlRelaxNGCleanupTree(ctxt, cur);
7295                         ctxt->flags = oldflags;
7296                         goto skip_children;
7297                     } else if ((cur->parent != NULL) &&
7298                                (xmlStrEqual
7299                                 (cur->parent->name, BAD_CAST "nsName"))) {
7300                         ctxt->flags |= XML_RELAXNG_IN_NSEXCEPT;
7301                         xmlRelaxNGCleanupTree(ctxt, cur);
7302                         ctxt->flags = oldflags;
7303                         goto skip_children;
7304                     }
7305                 } else if (xmlStrEqual(cur->name, BAD_CAST "anyName")) {
7306                     /*
7307                      * 4.16
7308                      */
7309                     if (ctxt->flags & XML_RELAXNG_IN_ANYEXCEPT) {
7310                         xmlRngPErr(ctxt, cur,
7311                                    XML_RNGP_PAT_ANYNAME_EXCEPT_ANYNAME,
7312                                    "Found anyName/except//anyName forbidden construct\n",
7313                                    NULL, NULL);
7314                     } else if (ctxt->flags & XML_RELAXNG_IN_NSEXCEPT) {
7315                         xmlRngPErr(ctxt, cur,
7316                                    XML_RNGP_PAT_NSNAME_EXCEPT_ANYNAME,
7317                                    "Found nsName/except//anyName forbidden construct\n",
7318                                    NULL, NULL);
7319                     }
7320                 }
7321                 /*
7322                  * This is not an else since "include" is transformed
7323                  * into a div
7324                  */
7325                 if (xmlStrEqual(cur->name, BAD_CAST "div")) {
7326                     xmlChar *ns;
7327                     xmlNodePtr child, ins, tmp;
7328 
7329                     /*
7330                      * implements rule 4.11
7331                      */
7332 
7333                     ns = xmlGetProp(cur, BAD_CAST "ns");
7334 
7335                     child = cur->children;
7336                     ins = cur;
7337                     while (child != NULL) {
7338                         if (ns != NULL) {
7339                             if (!xmlHasProp(child, BAD_CAST "ns")) {
7340                                 xmlSetProp(child, BAD_CAST "ns", ns);
7341                             }
7342                         }
7343                         tmp = child->next;
7344                         xmlUnlinkNode(child);
7345                         ins = xmlAddNextSibling(ins, child);
7346                         child = tmp;
7347                     }
7348                     if (ns != NULL)
7349                         xmlFree(ns);
7350 		    /*
7351 		     * Since we are about to delete cur, if its nsDef is non-NULL we
7352 		     * need to preserve it (it contains the ns definitions for the
7353 		     * children we just moved).  We'll just stick it on to the end
7354 		     * of cur->parent's list, since it's never going to be re-serialized
7355 		     * (bug 143738).
7356 		     */
7357 		    if ((cur->nsDef != NULL) && (cur->parent != NULL)) {
7358 			xmlNsPtr parDef = (xmlNsPtr)&cur->parent->nsDef;
7359 			while (parDef->next != NULL)
7360 			    parDef = parDef->next;
7361 			parDef->next = cur->nsDef;
7362 			cur->nsDef = NULL;
7363 		    }
7364                     delete = cur;
7365                     goto skip_children;
7366                 }
7367             }
7368         }
7369         /*
7370          * Simplification 4.2 whitespaces
7371          */
7372         else if ((cur->type == XML_TEXT_NODE) ||
7373                  (cur->type == XML_CDATA_SECTION_NODE)) {
7374             if (IS_BLANK_NODE(cur)) {
7375                 if ((cur->parent != NULL) &&
7376 		    (cur->parent->type == XML_ELEMENT_NODE)) {
7377                     if ((!xmlStrEqual(cur->parent->name, BAD_CAST "value"))
7378                         &&
7379                         (!xmlStrEqual
7380                          (cur->parent->name, BAD_CAST "param")))
7381                         delete = cur;
7382                 } else {
7383                     delete = cur;
7384                     goto skip_children;
7385                 }
7386             }
7387         } else {
7388             delete = cur;
7389             goto skip_children;
7390         }
7391 
7392         /*
7393          * Skip to next node
7394          */
7395         if (cur->children != NULL) {
7396             if ((cur->children->type != XML_ENTITY_DECL) &&
7397                 (cur->children->type != XML_ENTITY_REF_NODE) &&
7398                 (cur->children->type != XML_ENTITY_NODE)) {
7399                 cur = cur->children;
7400                 continue;
7401             }
7402         }
7403       skip_children:
7404         if (cur->next != NULL) {
7405             cur = cur->next;
7406             continue;
7407         }
7408 
7409         do {
7410             cur = cur->parent;
7411             if (cur == NULL)
7412                 break;
7413             if (cur == root) {
7414                 cur = NULL;
7415                 break;
7416             }
7417             if (cur->next != NULL) {
7418                 cur = cur->next;
7419                 break;
7420             }
7421         } while (cur != NULL);
7422     }
7423     if (delete != NULL) {
7424         xmlUnlinkNode(delete);
7425         xmlFreeNode(delete);
7426         delete = NULL;
7427     }
7428 }
7429 
7430 /**
7431  * xmlRelaxNGCleanupDoc:
7432  * @ctxt:  a Relax-NG parser context
7433  * @doc:  an xmldocPtr document pointer
7434  *
7435  * Cleanup the document from unwanted nodes for parsing, resolve
7436  * Include and externalRef lookups.
7437  *
7438  * Returns the cleaned up document or NULL in case of error
7439  */
7440 static xmlDocPtr
xmlRelaxNGCleanupDoc(xmlRelaxNGParserCtxtPtr ctxt,xmlDocPtr doc)7441 xmlRelaxNGCleanupDoc(xmlRelaxNGParserCtxtPtr ctxt, xmlDocPtr doc)
7442 {
7443     xmlNodePtr root;
7444 
7445     /*
7446      * Extract the root
7447      */
7448     root = xmlDocGetRootElement(doc);
7449     if (root == NULL) {
7450         xmlRngPErr(ctxt, (xmlNodePtr) doc, XML_RNGP_EMPTY, "xmlRelaxNGParse: %s is empty\n",
7451                    ctxt->URL, NULL);
7452         return (NULL);
7453     }
7454     xmlRelaxNGCleanupTree(ctxt, root);
7455     return (doc);
7456 }
7457 
7458 /**
7459  * xmlRelaxNGParse:
7460  * @ctxt:  a Relax-NG parser context
7461  *
7462  * parse a schema definition resource and build an internal
7463  * XML Shema struture which can be used to validate instances.
7464  *
7465  * Returns the internal XML RelaxNG structure built from the resource or
7466  *         NULL in case of error
7467  */
7468 xmlRelaxNGPtr
xmlRelaxNGParse(xmlRelaxNGParserCtxtPtr ctxt)7469 xmlRelaxNGParse(xmlRelaxNGParserCtxtPtr ctxt)
7470 {
7471     xmlRelaxNGPtr ret = NULL;
7472     xmlDocPtr doc;
7473     xmlNodePtr root;
7474 
7475     xmlRelaxNGInitTypes();
7476 
7477     if (ctxt == NULL)
7478         return (NULL);
7479 
7480     /*
7481      * First step is to parse the input document into an DOM/Infoset
7482      */
7483     if (ctxt->URL != NULL) {
7484         doc = xmlReadFile((const char *) ctxt->URL,NULL,0);
7485         if (doc == NULL) {
7486             xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
7487                        "xmlRelaxNGParse: could not load %s\n", ctxt->URL,
7488                        NULL);
7489             return (NULL);
7490         }
7491     } else if (ctxt->buffer != NULL) {
7492         doc = xmlReadMemory(ctxt->buffer, ctxt->size,NULL,NULL,0);
7493         if (doc == NULL) {
7494             xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
7495                        "xmlRelaxNGParse: could not parse schemas\n", NULL,
7496                        NULL);
7497             return (NULL);
7498         }
7499         doc->URL = xmlStrdup(BAD_CAST "in_memory_buffer");
7500         ctxt->URL = xmlStrdup(BAD_CAST "in_memory_buffer");
7501     } else if (ctxt->document != NULL) {
7502         doc = ctxt->document;
7503     } else {
7504         xmlRngPErr(ctxt, NULL, XML_RNGP_EMPTY,
7505                    "xmlRelaxNGParse: nothing to parse\n", NULL, NULL);
7506         return (NULL);
7507     }
7508     ctxt->document = doc;
7509 
7510     /*
7511      * Some preprocessing of the document content
7512      */
7513     doc = xmlRelaxNGCleanupDoc(ctxt, doc);
7514     if (doc == NULL) {
7515         xmlFreeDoc(ctxt->document);
7516         ctxt->document = NULL;
7517         return (NULL);
7518     }
7519 
7520     /*
7521      * Then do the parsing for good
7522      */
7523     root = xmlDocGetRootElement(doc);
7524     if (root == NULL) {
7525         xmlRngPErr(ctxt, (xmlNodePtr) doc,
7526 	           XML_RNGP_EMPTY, "xmlRelaxNGParse: %s is empty\n",
7527                    (ctxt->URL ? ctxt->URL : BAD_CAST "schemas"), NULL);
7528 
7529         xmlFreeDoc(ctxt->document);
7530         ctxt->document = NULL;
7531         return (NULL);
7532     }
7533     ret = xmlRelaxNGParseDocument(ctxt, root);
7534     if (ret == NULL) {
7535         xmlFreeDoc(ctxt->document);
7536         ctxt->document = NULL;
7537         return (NULL);
7538     }
7539 
7540     /*
7541      * Check the ref/defines links
7542      */
7543     /*
7544      * try to preprocess interleaves
7545      */
7546     if (ctxt->interleaves != NULL) {
7547         xmlHashScan(ctxt->interleaves,
7548                     (xmlHashScanner) xmlRelaxNGComputeInterleaves, ctxt);
7549     }
7550 
7551     /*
7552      * if there was a parsing error return NULL
7553      */
7554     if (ctxt->nbErrors > 0) {
7555         xmlRelaxNGFree(ret);
7556         ctxt->document = NULL;
7557         xmlFreeDoc(doc);
7558         return (NULL);
7559     }
7560 
7561     /*
7562      * try to compile (parts of) the schemas
7563      */
7564     if ((ret->topgrammar != NULL) && (ret->topgrammar->start != NULL)) {
7565         if (ret->topgrammar->start->type != XML_RELAXNG_START) {
7566             xmlRelaxNGDefinePtr def;
7567 
7568             def = xmlRelaxNGNewDefine(ctxt, NULL);
7569             if (def != NULL) {
7570                 def->type = XML_RELAXNG_START;
7571                 def->content = ret->topgrammar->start;
7572                 ret->topgrammar->start = def;
7573             }
7574         }
7575         xmlRelaxNGTryCompile(ctxt, ret->topgrammar->start);
7576     }
7577 
7578     /*
7579      * Transfer the pointer for cleanup at the schema level.
7580      */
7581     ret->doc = doc;
7582     ctxt->document = NULL;
7583     ret->documents = ctxt->documents;
7584     ctxt->documents = NULL;
7585 
7586     ret->includes = ctxt->includes;
7587     ctxt->includes = NULL;
7588     ret->defNr = ctxt->defNr;
7589     ret->defTab = ctxt->defTab;
7590     ctxt->defTab = NULL;
7591     if (ctxt->idref == 1)
7592         ret->idref = 1;
7593 
7594     return (ret);
7595 }
7596 
7597 /**
7598  * xmlRelaxNGSetParserErrors:
7599  * @ctxt:  a Relax-NG validation context
7600  * @err:  the error callback
7601  * @warn:  the warning callback
7602  * @ctx:  contextual data for the callbacks
7603  *
7604  * Set the callback functions used to handle errors for a validation context
7605  */
7606 void
xmlRelaxNGSetParserErrors(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGValidityErrorFunc err,xmlRelaxNGValidityWarningFunc warn,void * ctx)7607 xmlRelaxNGSetParserErrors(xmlRelaxNGParserCtxtPtr ctxt,
7608                           xmlRelaxNGValidityErrorFunc err,
7609                           xmlRelaxNGValidityWarningFunc warn, void *ctx)
7610 {
7611     if (ctxt == NULL)
7612         return;
7613     ctxt->error = err;
7614     ctxt->warning = warn;
7615     ctxt->serror = NULL;
7616     ctxt->userData = ctx;
7617 }
7618 
7619 /**
7620  * xmlRelaxNGGetParserErrors:
7621  * @ctxt:  a Relax-NG validation context
7622  * @err:  the error callback result
7623  * @warn:  the warning callback result
7624  * @ctx:  contextual data for the callbacks result
7625  *
7626  * Get the callback information used to handle errors for a validation context
7627  *
7628  * Returns -1 in case of failure, 0 otherwise.
7629  */
7630 int
xmlRelaxNGGetParserErrors(xmlRelaxNGParserCtxtPtr ctxt,xmlRelaxNGValidityErrorFunc * err,xmlRelaxNGValidityWarningFunc * warn,void ** ctx)7631 xmlRelaxNGGetParserErrors(xmlRelaxNGParserCtxtPtr ctxt,
7632                           xmlRelaxNGValidityErrorFunc * err,
7633                           xmlRelaxNGValidityWarningFunc * warn, void **ctx)
7634 {
7635     if (ctxt == NULL)
7636         return (-1);
7637     if (err != NULL)
7638         *err = ctxt->error;
7639     if (warn != NULL)
7640         *warn = ctxt->warning;
7641     if (ctx != NULL)
7642         *ctx = ctxt->userData;
7643     return (0);
7644 }
7645 
7646 /**
7647  * xmlRelaxNGSetParserStructuredErrors:
7648  * @ctxt:  a Relax-NG parser context
7649  * @serror:  the error callback
7650  * @ctx:  contextual data for the callbacks
7651  *
7652  * Set the callback functions used to handle errors for a parsing context
7653  */
7654 void
xmlRelaxNGSetParserStructuredErrors(xmlRelaxNGParserCtxtPtr ctxt,xmlStructuredErrorFunc serror,void * ctx)7655 xmlRelaxNGSetParserStructuredErrors(xmlRelaxNGParserCtxtPtr ctxt,
7656 				    xmlStructuredErrorFunc serror,
7657 				    void *ctx)
7658 {
7659     if (ctxt == NULL)
7660         return;
7661     ctxt->serror = serror;
7662     ctxt->error = NULL;
7663     ctxt->warning = NULL;
7664     ctxt->userData = ctx;
7665 }
7666 
7667 #ifdef LIBXML_OUTPUT_ENABLED
7668 
7669 /************************************************************************
7670  *									*
7671  *			Dump back a compiled form			*
7672  *									*
7673  ************************************************************************/
7674 static void xmlRelaxNGDumpDefine(FILE * output,
7675                                  xmlRelaxNGDefinePtr define);
7676 
7677 /**
7678  * xmlRelaxNGDumpDefines:
7679  * @output:  the file output
7680  * @defines:  a list of define structures
7681  *
7682  * Dump a RelaxNG structure back
7683  */
7684 static void
xmlRelaxNGDumpDefines(FILE * output,xmlRelaxNGDefinePtr defines)7685 xmlRelaxNGDumpDefines(FILE * output, xmlRelaxNGDefinePtr defines)
7686 {
7687     while (defines != NULL) {
7688         xmlRelaxNGDumpDefine(output, defines);
7689         defines = defines->next;
7690     }
7691 }
7692 
7693 /**
7694  * xmlRelaxNGDumpDefine:
7695  * @output:  the file output
7696  * @define:  a define structure
7697  *
7698  * Dump a RelaxNG structure back
7699  */
7700 static void
xmlRelaxNGDumpDefine(FILE * output,xmlRelaxNGDefinePtr define)7701 xmlRelaxNGDumpDefine(FILE * output, xmlRelaxNGDefinePtr define)
7702 {
7703     if (define == NULL)
7704         return;
7705     switch (define->type) {
7706         case XML_RELAXNG_EMPTY:
7707             fprintf(output, "<empty/>\n");
7708             break;
7709         case XML_RELAXNG_NOT_ALLOWED:
7710             fprintf(output, "<notAllowed/>\n");
7711             break;
7712         case XML_RELAXNG_TEXT:
7713             fprintf(output, "<text/>\n");
7714             break;
7715         case XML_RELAXNG_ELEMENT:
7716             fprintf(output, "<element>\n");
7717             if (define->name != NULL) {
7718                 fprintf(output, "<name");
7719                 if (define->ns != NULL)
7720                     fprintf(output, " ns=\"%s\"", define->ns);
7721                 fprintf(output, ">%s</name>\n", define->name);
7722             }
7723             xmlRelaxNGDumpDefines(output, define->attrs);
7724             xmlRelaxNGDumpDefines(output, define->content);
7725             fprintf(output, "</element>\n");
7726             break;
7727         case XML_RELAXNG_LIST:
7728             fprintf(output, "<list>\n");
7729             xmlRelaxNGDumpDefines(output, define->content);
7730             fprintf(output, "</list>\n");
7731             break;
7732         case XML_RELAXNG_ONEORMORE:
7733             fprintf(output, "<oneOrMore>\n");
7734             xmlRelaxNGDumpDefines(output, define->content);
7735             fprintf(output, "</oneOrMore>\n");
7736             break;
7737         case XML_RELAXNG_ZEROORMORE:
7738             fprintf(output, "<zeroOrMore>\n");
7739             xmlRelaxNGDumpDefines(output, define->content);
7740             fprintf(output, "</zeroOrMore>\n");
7741             break;
7742         case XML_RELAXNG_CHOICE:
7743             fprintf(output, "<choice>\n");
7744             xmlRelaxNGDumpDefines(output, define->content);
7745             fprintf(output, "</choice>\n");
7746             break;
7747         case XML_RELAXNG_GROUP:
7748             fprintf(output, "<group>\n");
7749             xmlRelaxNGDumpDefines(output, define->content);
7750             fprintf(output, "</group>\n");
7751             break;
7752         case XML_RELAXNG_INTERLEAVE:
7753             fprintf(output, "<interleave>\n");
7754             xmlRelaxNGDumpDefines(output, define->content);
7755             fprintf(output, "</interleave>\n");
7756             break;
7757         case XML_RELAXNG_OPTIONAL:
7758             fprintf(output, "<optional>\n");
7759             xmlRelaxNGDumpDefines(output, define->content);
7760             fprintf(output, "</optional>\n");
7761             break;
7762         case XML_RELAXNG_ATTRIBUTE:
7763             fprintf(output, "<attribute>\n");
7764             xmlRelaxNGDumpDefines(output, define->content);
7765             fprintf(output, "</attribute>\n");
7766             break;
7767         case XML_RELAXNG_DEF:
7768             fprintf(output, "<define");
7769             if (define->name != NULL)
7770                 fprintf(output, " name=\"%s\"", define->name);
7771             fprintf(output, ">\n");
7772             xmlRelaxNGDumpDefines(output, define->content);
7773             fprintf(output, "</define>\n");
7774             break;
7775         case XML_RELAXNG_REF:
7776             fprintf(output, "<ref");
7777             if (define->name != NULL)
7778                 fprintf(output, " name=\"%s\"", define->name);
7779             fprintf(output, ">\n");
7780             xmlRelaxNGDumpDefines(output, define->content);
7781             fprintf(output, "</ref>\n");
7782             break;
7783         case XML_RELAXNG_PARENTREF:
7784             fprintf(output, "<parentRef");
7785             if (define->name != NULL)
7786                 fprintf(output, " name=\"%s\"", define->name);
7787             fprintf(output, ">\n");
7788             xmlRelaxNGDumpDefines(output, define->content);
7789             fprintf(output, "</parentRef>\n");
7790             break;
7791         case XML_RELAXNG_EXTERNALREF:
7792             fprintf(output, "<externalRef>");
7793             xmlRelaxNGDumpDefines(output, define->content);
7794             fprintf(output, "</externalRef>\n");
7795             break;
7796         case XML_RELAXNG_DATATYPE:
7797         case XML_RELAXNG_VALUE:
7798             TODO break;
7799         case XML_RELAXNG_START:
7800         case XML_RELAXNG_EXCEPT:
7801         case XML_RELAXNG_PARAM:
7802             TODO break;
7803         case XML_RELAXNG_NOOP:
7804             xmlRelaxNGDumpDefines(output, define->content);
7805             break;
7806     }
7807 }
7808 
7809 /**
7810  * xmlRelaxNGDumpGrammar:
7811  * @output:  the file output
7812  * @grammar:  a grammar structure
7813  * @top:  is this a top grammar
7814  *
7815  * Dump a RelaxNG structure back
7816  */
7817 static void
xmlRelaxNGDumpGrammar(FILE * output,xmlRelaxNGGrammarPtr grammar,int top)7818 xmlRelaxNGDumpGrammar(FILE * output, xmlRelaxNGGrammarPtr grammar, int top)
7819 {
7820     if (grammar == NULL)
7821         return;
7822 
7823     fprintf(output, "<grammar");
7824     if (top)
7825         fprintf(output, " xmlns=\"http://relaxng.org/ns/structure/1.0\"");
7826     switch (grammar->combine) {
7827         case XML_RELAXNG_COMBINE_UNDEFINED:
7828             break;
7829         case XML_RELAXNG_COMBINE_CHOICE:
7830             fprintf(output, " combine=\"choice\"");
7831             break;
7832         case XML_RELAXNG_COMBINE_INTERLEAVE:
7833             fprintf(output, " combine=\"interleave\"");
7834             break;
7835         default:
7836             fprintf(output, " <!-- invalid combine value -->");
7837     }
7838     fprintf(output, ">\n");
7839     if (grammar->start == NULL) {
7840         fprintf(output, " <!-- grammar had no start -->");
7841     } else {
7842         fprintf(output, "<start>\n");
7843         xmlRelaxNGDumpDefine(output, grammar->start);
7844         fprintf(output, "</start>\n");
7845     }
7846     /* TODO ? Dump the defines ? */
7847     fprintf(output, "</grammar>\n");
7848 }
7849 
7850 /**
7851  * xmlRelaxNGDump:
7852  * @output:  the file output
7853  * @schema:  a schema structure
7854  *
7855  * Dump a RelaxNG structure back
7856  */
7857 void
xmlRelaxNGDump(FILE * output,xmlRelaxNGPtr schema)7858 xmlRelaxNGDump(FILE * output, xmlRelaxNGPtr schema)
7859 {
7860     if (output == NULL)
7861         return;
7862     if (schema == NULL) {
7863         fprintf(output, "RelaxNG empty or failed to compile\n");
7864         return;
7865     }
7866     fprintf(output, "RelaxNG: ");
7867     if (schema->doc == NULL) {
7868         fprintf(output, "no document\n");
7869     } else if (schema->doc->URL != NULL) {
7870         fprintf(output, "%s\n", schema->doc->URL);
7871     } else {
7872         fprintf(output, "\n");
7873     }
7874     if (schema->topgrammar == NULL) {
7875         fprintf(output, "RelaxNG has no top grammar\n");
7876         return;
7877     }
7878     xmlRelaxNGDumpGrammar(output, schema->topgrammar, 1);
7879 }
7880 
7881 /**
7882  * xmlRelaxNGDumpTree:
7883  * @output:  the file output
7884  * @schema:  a schema structure
7885  *
7886  * Dump the transformed RelaxNG tree.
7887  */
7888 void
xmlRelaxNGDumpTree(FILE * output,xmlRelaxNGPtr schema)7889 xmlRelaxNGDumpTree(FILE * output, xmlRelaxNGPtr schema)
7890 {
7891     if (output == NULL)
7892         return;
7893     if (schema == NULL) {
7894         fprintf(output, "RelaxNG empty or failed to compile\n");
7895         return;
7896     }
7897     if (schema->doc == NULL) {
7898         fprintf(output, "no document\n");
7899     } else {
7900         xmlDocDump(output, schema->doc);
7901     }
7902 }
7903 #endif /* LIBXML_OUTPUT_ENABLED */
7904 
7905 /************************************************************************
7906  *									*
7907  *		Validation of compiled content				*
7908  *									*
7909  ************************************************************************/
7910 static int xmlRelaxNGValidateDefinition(xmlRelaxNGValidCtxtPtr ctxt,
7911                                         xmlRelaxNGDefinePtr define);
7912 
7913 /**
7914  * xmlRelaxNGValidateCompiledCallback:
7915  * @exec:  the regular expression instance
7916  * @token:  the token which matched
7917  * @transdata:  callback data, the define for the subelement if available
7918  @ @inputdata:  callback data, the Relax NG validation context
7919  *
7920  * Handle the callback and if needed validate the element children.
7921  */
7922 static void
xmlRelaxNGValidateCompiledCallback(xmlRegExecCtxtPtr exec ATTRIBUTE_UNUSED,const xmlChar * token,void * transdata,void * inputdata)7923 xmlRelaxNGValidateCompiledCallback(xmlRegExecCtxtPtr exec ATTRIBUTE_UNUSED,
7924                                    const xmlChar * token,
7925                                    void *transdata, void *inputdata)
7926 {
7927     xmlRelaxNGValidCtxtPtr ctxt = (xmlRelaxNGValidCtxtPtr) inputdata;
7928     xmlRelaxNGDefinePtr define = (xmlRelaxNGDefinePtr) transdata;
7929     int ret;
7930 
7931 #ifdef DEBUG_COMPILE
7932     xmlGenericError(xmlGenericErrorContext,
7933                     "Compiled callback for: '%s'\n", token);
7934 #endif
7935     if (ctxt == NULL) {
7936         fprintf(stderr, "callback on %s missing context\n", token);
7937         return;
7938     }
7939     if (define == NULL) {
7940         if (token[0] == '#')
7941             return;
7942         fprintf(stderr, "callback on %s missing define\n", token);
7943         if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
7944             ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
7945         return;
7946     }
7947     if ((ctxt == NULL) || (define == NULL)) {
7948         fprintf(stderr, "callback on %s missing info\n", token);
7949         if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
7950             ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
7951         return;
7952     } else if (define->type != XML_RELAXNG_ELEMENT) {
7953         fprintf(stderr, "callback on %s define is not element\n", token);
7954         if (ctxt->errNo == XML_RELAXNG_OK)
7955             ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
7956         return;
7957     }
7958     ret = xmlRelaxNGValidateDefinition(ctxt, define);
7959     if (ret != 0)
7960         ctxt->perr = ret;
7961 }
7962 
7963 /**
7964  * xmlRelaxNGValidateCompiledContent:
7965  * @ctxt:  the RelaxNG validation context
7966  * @regexp:  the regular expression as compiled
7967  * @content:  list of children to test against the regexp
7968  *
7969  * Validate the content model of an element or start using the regexp
7970  *
7971  * Returns 0 in case of success, -1 in case of error.
7972  */
7973 static int
xmlRelaxNGValidateCompiledContent(xmlRelaxNGValidCtxtPtr ctxt,xmlRegexpPtr regexp,xmlNodePtr content)7974 xmlRelaxNGValidateCompiledContent(xmlRelaxNGValidCtxtPtr ctxt,
7975                                   xmlRegexpPtr regexp, xmlNodePtr content)
7976 {
7977     xmlRegExecCtxtPtr exec;
7978     xmlNodePtr cur;
7979     int ret = 0;
7980     int oldperr;
7981 
7982     if ((ctxt == NULL) || (regexp == NULL))
7983         return (-1);
7984     oldperr = ctxt->perr;
7985     exec = xmlRegNewExecCtxt(regexp,
7986                              xmlRelaxNGValidateCompiledCallback, ctxt);
7987     ctxt->perr = 0;
7988     cur = content;
7989     while (cur != NULL) {
7990         ctxt->state->seq = cur;
7991         switch (cur->type) {
7992             case XML_TEXT_NODE:
7993             case XML_CDATA_SECTION_NODE:
7994                 if (xmlIsBlankNode(cur))
7995                     break;
7996                 ret = xmlRegExecPushString(exec, BAD_CAST "#text", ctxt);
7997                 if (ret < 0) {
7998                     VALID_ERR2(XML_RELAXNG_ERR_TEXTWRONG,
7999                                cur->parent->name);
8000                 }
8001                 break;
8002             case XML_ELEMENT_NODE:
8003                 if (cur->ns != NULL) {
8004                     ret = xmlRegExecPushString2(exec, cur->name,
8005                                                 cur->ns->href, ctxt);
8006                 } else {
8007                     ret = xmlRegExecPushString(exec, cur->name, ctxt);
8008                 }
8009                 if (ret < 0) {
8010                     VALID_ERR2(XML_RELAXNG_ERR_ELEMWRONG, cur->name);
8011                 }
8012                 break;
8013             default:
8014                 break;
8015         }
8016         if (ret < 0)
8017             break;
8018         /*
8019          * Switch to next element
8020          */
8021         cur = cur->next;
8022     }
8023     ret = xmlRegExecPushString(exec, NULL, NULL);
8024     if (ret == 1) {
8025         ret = 0;
8026         ctxt->state->seq = NULL;
8027     } else if (ret == 0) {
8028         /*
8029          * TODO: get some of the names needed to exit the current state of exec
8030          */
8031         VALID_ERR2(XML_RELAXNG_ERR_NOELEM, BAD_CAST "");
8032         ret = -1;
8033         if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
8034             xmlRelaxNGDumpValidError(ctxt);
8035     } else {
8036         ret = -1;
8037     }
8038     xmlRegFreeExecCtxt(exec);
8039     /*
8040      * There might be content model errors outside of the pure
8041      * regexp validation, e.g. for attribute values.
8042      */
8043     if ((ret == 0) && (ctxt->perr != 0)) {
8044         ret = ctxt->perr;
8045     }
8046     ctxt->perr = oldperr;
8047     return (ret);
8048 }
8049 
8050 /************************************************************************
8051  *									*
8052  *		Progressive validation of when possible			*
8053  *									*
8054  ************************************************************************/
8055 static int xmlRelaxNGValidateAttributeList(xmlRelaxNGValidCtxtPtr ctxt,
8056                                            xmlRelaxNGDefinePtr defines);
8057 static int xmlRelaxNGValidateElementEnd(xmlRelaxNGValidCtxtPtr ctxt,
8058                                         int dolog);
8059 static void xmlRelaxNGLogBestError(xmlRelaxNGValidCtxtPtr ctxt);
8060 
8061 /**
8062  * xmlRelaxNGElemPush:
8063  * @ctxt:  the validation context
8064  * @exec:  the regexp runtime for the new content model
8065  *
8066  * Push a new regexp for the current node content model on the stack
8067  *
8068  * Returns 0 in case of success and -1 in case of error.
8069  */
8070 static int
xmlRelaxNGElemPush(xmlRelaxNGValidCtxtPtr ctxt,xmlRegExecCtxtPtr exec)8071 xmlRelaxNGElemPush(xmlRelaxNGValidCtxtPtr ctxt, xmlRegExecCtxtPtr exec)
8072 {
8073     if (ctxt->elemTab == NULL) {
8074         ctxt->elemMax = 10;
8075         ctxt->elemTab = (xmlRegExecCtxtPtr *) xmlMalloc(ctxt->elemMax *
8076                                                         sizeof
8077                                                         (xmlRegExecCtxtPtr));
8078         if (ctxt->elemTab == NULL) {
8079             xmlRngVErrMemory(ctxt, "validating\n");
8080             return (-1);
8081         }
8082     }
8083     if (ctxt->elemNr >= ctxt->elemMax) {
8084         ctxt->elemMax *= 2;
8085         ctxt->elemTab = (xmlRegExecCtxtPtr *) xmlRealloc(ctxt->elemTab,
8086                                                          ctxt->elemMax *
8087                                                          sizeof
8088                                                          (xmlRegExecCtxtPtr));
8089         if (ctxt->elemTab == NULL) {
8090             xmlRngVErrMemory(ctxt, "validating\n");
8091             return (-1);
8092         }
8093     }
8094     ctxt->elemTab[ctxt->elemNr++] = exec;
8095     ctxt->elem = exec;
8096     return (0);
8097 }
8098 
8099 /**
8100  * xmlRelaxNGElemPop:
8101  * @ctxt:  the validation context
8102  *
8103  * Pop the regexp of the current node content model from the stack
8104  *
8105  * Returns the exec or NULL if empty
8106  */
8107 static xmlRegExecCtxtPtr
xmlRelaxNGElemPop(xmlRelaxNGValidCtxtPtr ctxt)8108 xmlRelaxNGElemPop(xmlRelaxNGValidCtxtPtr ctxt)
8109 {
8110     xmlRegExecCtxtPtr ret;
8111 
8112     if (ctxt->elemNr <= 0)
8113         return (NULL);
8114     ctxt->elemNr--;
8115     ret = ctxt->elemTab[ctxt->elemNr];
8116     ctxt->elemTab[ctxt->elemNr] = NULL;
8117     if (ctxt->elemNr > 0)
8118         ctxt->elem = ctxt->elemTab[ctxt->elemNr - 1];
8119     else
8120         ctxt->elem = NULL;
8121     return (ret);
8122 }
8123 
8124 /**
8125  * xmlRelaxNGValidateProgressiveCallback:
8126  * @exec:  the regular expression instance
8127  * @token:  the token which matched
8128  * @transdata:  callback data, the define for the subelement if available
8129  @ @inputdata:  callback data, the Relax NG validation context
8130  *
8131  * Handle the callback and if needed validate the element children.
8132  * some of the in/out informations are passed via the context in @inputdata.
8133  */
8134 static void
xmlRelaxNGValidateProgressiveCallback(xmlRegExecCtxtPtr exec ATTRIBUTE_UNUSED,const xmlChar * token,void * transdata,void * inputdata)8135 xmlRelaxNGValidateProgressiveCallback(xmlRegExecCtxtPtr exec
8136                                       ATTRIBUTE_UNUSED,
8137                                       const xmlChar * token,
8138                                       void *transdata, void *inputdata)
8139 {
8140     xmlRelaxNGValidCtxtPtr ctxt = (xmlRelaxNGValidCtxtPtr) inputdata;
8141     xmlRelaxNGDefinePtr define = (xmlRelaxNGDefinePtr) transdata;
8142     xmlRelaxNGValidStatePtr state, oldstate;
8143     xmlNodePtr node;
8144     int ret = 0, oldflags;
8145 
8146 #ifdef DEBUG_PROGRESSIVE
8147     xmlGenericError(xmlGenericErrorContext,
8148                     "Progressive callback for: '%s'\n", token);
8149 #endif
8150     if (ctxt == NULL) {
8151         fprintf(stderr, "callback on %s missing context\n", token);
8152         return;
8153     }
8154     node = ctxt->pnode;
8155     ctxt->pstate = 1;
8156     if (define == NULL) {
8157         if (token[0] == '#')
8158             return;
8159         fprintf(stderr, "callback on %s missing define\n", token);
8160         if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
8161             ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
8162         ctxt->pstate = -1;
8163         return;
8164     }
8165     if ((ctxt == NULL) || (define == NULL)) {
8166         fprintf(stderr, "callback on %s missing info\n", token);
8167         if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
8168             ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
8169         ctxt->pstate = -1;
8170         return;
8171     } else if (define->type != XML_RELAXNG_ELEMENT) {
8172         fprintf(stderr, "callback on %s define is not element\n", token);
8173         if (ctxt->errNo == XML_RELAXNG_OK)
8174             ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
8175         ctxt->pstate = -1;
8176         return;
8177     }
8178     if (node->type != XML_ELEMENT_NODE) {
8179         VALID_ERR(XML_RELAXNG_ERR_NOTELEM);
8180         if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
8181             xmlRelaxNGDumpValidError(ctxt);
8182         ctxt->pstate = -1;
8183         return;
8184     }
8185     if (define->contModel == NULL) {
8186         /*
8187          * this node cannot be validated in a streamable fashion
8188          */
8189 #ifdef DEBUG_PROGRESSIVE
8190         xmlGenericError(xmlGenericErrorContext,
8191                         "Element '%s' validation is not streamable\n",
8192                         token);
8193 #endif
8194         ctxt->pstate = 0;
8195         ctxt->pdef = define;
8196         return;
8197     }
8198     exec = xmlRegNewExecCtxt(define->contModel,
8199                              xmlRelaxNGValidateProgressiveCallback, ctxt);
8200     if (exec == NULL) {
8201         ctxt->pstate = -1;
8202         return;
8203     }
8204     xmlRelaxNGElemPush(ctxt, exec);
8205 
8206     /*
8207      * Validate the attributes part of the content.
8208      */
8209     state = xmlRelaxNGNewValidState(ctxt, node);
8210     if (state == NULL) {
8211         ctxt->pstate = -1;
8212         return;
8213     }
8214     oldstate = ctxt->state;
8215     ctxt->state = state;
8216     if (define->attrs != NULL) {
8217         ret = xmlRelaxNGValidateAttributeList(ctxt, define->attrs);
8218         if (ret != 0) {
8219             ctxt->pstate = -1;
8220             VALID_ERR2(XML_RELAXNG_ERR_ATTRVALID, node->name);
8221         }
8222     }
8223     if (ctxt->state != NULL) {
8224         ctxt->state->seq = NULL;
8225         ret = xmlRelaxNGValidateElementEnd(ctxt, 1);
8226         if (ret != 0) {
8227             ctxt->pstate = -1;
8228         }
8229         xmlRelaxNGFreeValidState(ctxt, ctxt->state);
8230     } else if (ctxt->states != NULL) {
8231         int tmp = -1, i;
8232 
8233         oldflags = ctxt->flags;
8234 
8235         for (i = 0; i < ctxt->states->nbState; i++) {
8236             state = ctxt->states->tabState[i];
8237             ctxt->state = state;
8238             ctxt->state->seq = NULL;
8239 
8240             if (xmlRelaxNGValidateElementEnd(ctxt, 0) == 0) {
8241                 tmp = 0;
8242                 break;
8243             }
8244         }
8245         if (tmp != 0) {
8246             /*
8247              * validation error, log the message for the "best" one
8248              */
8249             ctxt->flags |= FLAGS_IGNORABLE;
8250             xmlRelaxNGLogBestError(ctxt);
8251         }
8252         for (i = 0; i < ctxt->states->nbState; i++) {
8253             xmlRelaxNGFreeValidState(ctxt, ctxt->states->tabState[i]);
8254         }
8255         xmlRelaxNGFreeStates(ctxt, ctxt->states);
8256         ctxt->states = NULL;
8257         if ((ret == 0) && (tmp == -1))
8258             ctxt->pstate = -1;
8259         ctxt->flags = oldflags;
8260     }
8261     if (ctxt->pstate == -1) {
8262         if ((ctxt->flags & FLAGS_IGNORABLE) == 0) {
8263             xmlRelaxNGDumpValidError(ctxt);
8264         }
8265     }
8266     ctxt->state = oldstate;
8267 }
8268 
8269 /**
8270  * xmlRelaxNGValidatePushElement:
8271  * @ctxt:  the validation context
8272  * @doc:  a document instance
8273  * @elem:  an element instance
8274  *
8275  * Push a new element start on the RelaxNG validation stack.
8276  *
8277  * returns 1 if no validation problem was found or 0 if validating the
8278  *         element requires a full node, and -1 in case of error.
8279  */
8280 int
xmlRelaxNGValidatePushElement(xmlRelaxNGValidCtxtPtr ctxt,xmlDocPtr doc ATTRIBUTE_UNUSED,xmlNodePtr elem)8281 xmlRelaxNGValidatePushElement(xmlRelaxNGValidCtxtPtr ctxt,
8282                               xmlDocPtr doc ATTRIBUTE_UNUSED,
8283                               xmlNodePtr elem)
8284 {
8285     int ret = 1;
8286 
8287     if ((ctxt == NULL) || (elem == NULL))
8288         return (-1);
8289 
8290 #ifdef DEBUG_PROGRESSIVE
8291     xmlGenericError(xmlGenericErrorContext, "PushElem %s\n", elem->name);
8292 #endif
8293     if (ctxt->elem == 0) {
8294         xmlRelaxNGPtr schema;
8295         xmlRelaxNGGrammarPtr grammar;
8296         xmlRegExecCtxtPtr exec;
8297         xmlRelaxNGDefinePtr define;
8298 
8299         schema = ctxt->schema;
8300         if (schema == NULL) {
8301             VALID_ERR(XML_RELAXNG_ERR_NOGRAMMAR);
8302             return (-1);
8303         }
8304         grammar = schema->topgrammar;
8305         if ((grammar == NULL) || (grammar->start == NULL)) {
8306             VALID_ERR(XML_RELAXNG_ERR_NOGRAMMAR);
8307             return (-1);
8308         }
8309         define = grammar->start;
8310         if (define->contModel == NULL) {
8311             ctxt->pdef = define;
8312             return (0);
8313         }
8314         exec = xmlRegNewExecCtxt(define->contModel,
8315                                  xmlRelaxNGValidateProgressiveCallback,
8316                                  ctxt);
8317         if (exec == NULL) {
8318             return (-1);
8319         }
8320         xmlRelaxNGElemPush(ctxt, exec);
8321     }
8322     ctxt->pnode = elem;
8323     ctxt->pstate = 0;
8324     if (elem->ns != NULL) {
8325         ret =
8326             xmlRegExecPushString2(ctxt->elem, elem->name, elem->ns->href,
8327                                   ctxt);
8328     } else {
8329         ret = xmlRegExecPushString(ctxt->elem, elem->name, ctxt);
8330     }
8331     if (ret < 0) {
8332         VALID_ERR2(XML_RELAXNG_ERR_ELEMWRONG, elem->name);
8333     } else {
8334         if (ctxt->pstate == 0)
8335             ret = 0;
8336         else if (ctxt->pstate < 0)
8337             ret = -1;
8338         else
8339             ret = 1;
8340     }
8341 #ifdef DEBUG_PROGRESSIVE
8342     if (ret < 0)
8343         xmlGenericError(xmlGenericErrorContext, "PushElem %s failed\n",
8344                         elem->name);
8345 #endif
8346     return (ret);
8347 }
8348 
8349 /**
8350  * xmlRelaxNGValidatePushCData:
8351  * @ctxt:  the RelaxNG validation context
8352  * @data:  some character data read
8353  * @len:  the length of the data
8354  *
8355  * check the CData parsed for validation in the current stack
8356  *
8357  * returns 1 if no validation problem was found or -1 otherwise
8358  */
8359 int
xmlRelaxNGValidatePushCData(xmlRelaxNGValidCtxtPtr ctxt,const xmlChar * data,int len ATTRIBUTE_UNUSED)8360 xmlRelaxNGValidatePushCData(xmlRelaxNGValidCtxtPtr ctxt,
8361                             const xmlChar * data, int len ATTRIBUTE_UNUSED)
8362 {
8363     int ret = 1;
8364 
8365     if ((ctxt == NULL) || (ctxt->elem == NULL) || (data == NULL))
8366         return (-1);
8367 
8368 #ifdef DEBUG_PROGRESSIVE
8369     xmlGenericError(xmlGenericErrorContext, "CDATA %s %d\n", data, len);
8370 #endif
8371 
8372     while (*data != 0) {
8373         if (!IS_BLANK_CH(*data))
8374             break;
8375         data++;
8376     }
8377     if (*data == 0)
8378         return (1);
8379 
8380     ret = xmlRegExecPushString(ctxt->elem, BAD_CAST "#text", ctxt);
8381     if (ret < 0) {
8382         VALID_ERR2(XML_RELAXNG_ERR_TEXTWRONG, BAD_CAST " TODO ");
8383 #ifdef DEBUG_PROGRESSIVE
8384         xmlGenericError(xmlGenericErrorContext, "CDATA failed\n");
8385 #endif
8386 
8387         return (-1);
8388     }
8389     return (1);
8390 }
8391 
8392 /**
8393  * xmlRelaxNGValidatePopElement:
8394  * @ctxt:  the RelaxNG validation context
8395  * @doc:  a document instance
8396  * @elem:  an element instance
8397  *
8398  * Pop the element end from the RelaxNG validation stack.
8399  *
8400  * returns 1 if no validation problem was found or 0 otherwise
8401  */
8402 int
xmlRelaxNGValidatePopElement(xmlRelaxNGValidCtxtPtr ctxt,xmlDocPtr doc ATTRIBUTE_UNUSED,xmlNodePtr elem)8403 xmlRelaxNGValidatePopElement(xmlRelaxNGValidCtxtPtr ctxt,
8404                              xmlDocPtr doc ATTRIBUTE_UNUSED,
8405                              xmlNodePtr elem)
8406 {
8407     int ret;
8408     xmlRegExecCtxtPtr exec;
8409 
8410     if ((ctxt == NULL) || (ctxt->elem == NULL) || (elem == NULL))
8411         return (-1);
8412 #ifdef DEBUG_PROGRESSIVE
8413     xmlGenericError(xmlGenericErrorContext, "PopElem %s\n", elem->name);
8414 #endif
8415     /*
8416      * verify that we reached a terminal state of the content model.
8417      */
8418     exec = xmlRelaxNGElemPop(ctxt);
8419     ret = xmlRegExecPushString(exec, NULL, NULL);
8420     if (ret == 0) {
8421         /*
8422          * TODO: get some of the names needed to exit the current state of exec
8423          */
8424         VALID_ERR2(XML_RELAXNG_ERR_NOELEM, BAD_CAST "");
8425         ret = -1;
8426     } else if (ret < 0) {
8427         ret = -1;
8428     } else {
8429         ret = 1;
8430     }
8431     xmlRegFreeExecCtxt(exec);
8432 #ifdef DEBUG_PROGRESSIVE
8433     if (ret < 0)
8434         xmlGenericError(xmlGenericErrorContext, "PopElem %s failed\n",
8435                         elem->name);
8436 #endif
8437     return (ret);
8438 }
8439 
8440 /**
8441  * xmlRelaxNGValidateFullElement:
8442  * @ctxt:  the validation context
8443  * @doc:  a document instance
8444  * @elem:  an element instance
8445  *
8446  * Validate a full subtree when xmlRelaxNGValidatePushElement() returned
8447  * 0 and the content of the node has been expanded.
8448  *
8449  * returns 1 if no validation problem was found or -1 in case of error.
8450  */
8451 int
xmlRelaxNGValidateFullElement(xmlRelaxNGValidCtxtPtr ctxt,xmlDocPtr doc ATTRIBUTE_UNUSED,xmlNodePtr elem)8452 xmlRelaxNGValidateFullElement(xmlRelaxNGValidCtxtPtr ctxt,
8453                               xmlDocPtr doc ATTRIBUTE_UNUSED,
8454                               xmlNodePtr elem)
8455 {
8456     int ret;
8457     xmlRelaxNGValidStatePtr state;
8458 
8459     if ((ctxt == NULL) || (ctxt->pdef == NULL) || (elem == NULL))
8460         return (-1);
8461 #ifdef DEBUG_PROGRESSIVE
8462     xmlGenericError(xmlGenericErrorContext, "FullElem %s\n", elem->name);
8463 #endif
8464     state = xmlRelaxNGNewValidState(ctxt, elem->parent);
8465     if (state == NULL) {
8466         return (-1);
8467     }
8468     state->seq = elem;
8469     ctxt->state = state;
8470     ctxt->errNo = XML_RELAXNG_OK;
8471     ret = xmlRelaxNGValidateDefinition(ctxt, ctxt->pdef);
8472     if ((ret != 0) || (ctxt->errNo != XML_RELAXNG_OK))
8473         ret = -1;
8474     else
8475         ret = 1;
8476     xmlRelaxNGFreeValidState(ctxt, ctxt->state);
8477     ctxt->state = NULL;
8478 #ifdef DEBUG_PROGRESSIVE
8479     if (ret < 0)
8480         xmlGenericError(xmlGenericErrorContext, "FullElem %s failed\n",
8481                         elem->name);
8482 #endif
8483     return (ret);
8484 }
8485 
8486 /************************************************************************
8487  *									*
8488  *		Generic interpreted validation implementation		*
8489  *									*
8490  ************************************************************************/
8491 static int xmlRelaxNGValidateValue(xmlRelaxNGValidCtxtPtr ctxt,
8492                                    xmlRelaxNGDefinePtr define);
8493 
8494 /**
8495  * xmlRelaxNGSkipIgnored:
8496  * @ctxt:  a schema validation context
8497  * @node:  the top node.
8498  *
8499  * Skip ignorable nodes in that context
8500  *
8501  * Returns the new sibling or NULL in case of error.
8502  */
8503 static xmlNodePtr
xmlRelaxNGSkipIgnored(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,xmlNodePtr node)8504 xmlRelaxNGSkipIgnored(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,
8505                       xmlNodePtr node)
8506 {
8507     /*
8508      * TODO complete and handle entities
8509      */
8510     while ((node != NULL) &&
8511            ((node->type == XML_COMMENT_NODE) ||
8512             (node->type == XML_PI_NODE) ||
8513 	    (node->type == XML_XINCLUDE_START) ||
8514 	    (node->type == XML_XINCLUDE_END) ||
8515             (((node->type == XML_TEXT_NODE) ||
8516               (node->type == XML_CDATA_SECTION_NODE)) &&
8517              ((ctxt->flags & FLAGS_MIXED_CONTENT) ||
8518               (IS_BLANK_NODE(node)))))) {
8519         node = node->next;
8520     }
8521     return (node);
8522 }
8523 
8524 /**
8525  * xmlRelaxNGNormalize:
8526  * @ctxt:  a schema validation context
8527  * @str:  the string to normalize
8528  *
8529  * Implements the  normalizeWhiteSpace( s ) function from
8530  * section 6.2.9 of the spec
8531  *
8532  * Returns the new string or NULL in case of error.
8533  */
8534 static xmlChar *
xmlRelaxNGNormalize(xmlRelaxNGValidCtxtPtr ctxt,const xmlChar * str)8535 xmlRelaxNGNormalize(xmlRelaxNGValidCtxtPtr ctxt, const xmlChar * str)
8536 {
8537     xmlChar *ret, *p;
8538     const xmlChar *tmp;
8539     int len;
8540 
8541     if (str == NULL)
8542         return (NULL);
8543     tmp = str;
8544     while (*tmp != 0)
8545         tmp++;
8546     len = tmp - str;
8547 
8548     ret = (xmlChar *) xmlMallocAtomic((len + 1) * sizeof(xmlChar));
8549     if (ret == NULL) {
8550         xmlRngVErrMemory(ctxt, "validating\n");
8551         return (NULL);
8552     }
8553     p = ret;
8554     while (IS_BLANK_CH(*str))
8555         str++;
8556     while (*str != 0) {
8557         if (IS_BLANK_CH(*str)) {
8558             while (IS_BLANK_CH(*str))
8559                 str++;
8560             if (*str == 0)
8561                 break;
8562             *p++ = ' ';
8563         } else
8564             *p++ = *str++;
8565     }
8566     *p = 0;
8567     return (ret);
8568 }
8569 
8570 /**
8571  * xmlRelaxNGValidateDatatype:
8572  * @ctxt:  a Relax-NG validation context
8573  * @value:  the string value
8574  * @type:  the datatype definition
8575  * @node:  the node
8576  *
8577  * Validate the given value against the dataype
8578  *
8579  * Returns 0 if the validation succeeded or an error code.
8580  */
8581 static int
xmlRelaxNGValidateDatatype(xmlRelaxNGValidCtxtPtr ctxt,const xmlChar * value,xmlRelaxNGDefinePtr define,xmlNodePtr node)8582 xmlRelaxNGValidateDatatype(xmlRelaxNGValidCtxtPtr ctxt,
8583                            const xmlChar * value,
8584                            xmlRelaxNGDefinePtr define, xmlNodePtr node)
8585 {
8586     int ret, tmp;
8587     xmlRelaxNGTypeLibraryPtr lib;
8588     void *result = NULL;
8589     xmlRelaxNGDefinePtr cur;
8590 
8591     if ((define == NULL) || (define->data == NULL)) {
8592         return (-1);
8593     }
8594     lib = (xmlRelaxNGTypeLibraryPtr) define->data;
8595     if (lib->check != NULL) {
8596         if ((define->attrs != NULL) &&
8597             (define->attrs->type == XML_RELAXNG_PARAM)) {
8598             ret =
8599                 lib->check(lib->data, define->name, value, &result, node);
8600         } else {
8601             ret = lib->check(lib->data, define->name, value, NULL, node);
8602         }
8603     } else
8604         ret = -1;
8605     if (ret < 0) {
8606         VALID_ERR2(XML_RELAXNG_ERR_TYPE, define->name);
8607         if ((result != NULL) && (lib != NULL) && (lib->freef != NULL))
8608             lib->freef(lib->data, result);
8609         return (-1);
8610     } else if (ret == 1) {
8611         ret = 0;
8612     } else if (ret == 2) {
8613         VALID_ERR2P(XML_RELAXNG_ERR_DUPID, value);
8614     } else {
8615         VALID_ERR3P(XML_RELAXNG_ERR_TYPEVAL, define->name, value);
8616         ret = -1;
8617     }
8618     cur = define->attrs;
8619     while ((ret == 0) && (cur != NULL) && (cur->type == XML_RELAXNG_PARAM)) {
8620         if (lib->facet != NULL) {
8621             tmp = lib->facet(lib->data, define->name, cur->name,
8622                              cur->value, value, result);
8623             if (tmp != 0)
8624                 ret = -1;
8625         }
8626         cur = cur->next;
8627     }
8628     if ((ret == 0) && (define->content != NULL)) {
8629         const xmlChar *oldvalue, *oldendvalue;
8630 
8631         oldvalue = ctxt->state->value;
8632         oldendvalue = ctxt->state->endvalue;
8633         ctxt->state->value = (xmlChar *) value;
8634         ctxt->state->endvalue = NULL;
8635         ret = xmlRelaxNGValidateValue(ctxt, define->content);
8636         ctxt->state->value = (xmlChar *) oldvalue;
8637         ctxt->state->endvalue = (xmlChar *) oldendvalue;
8638     }
8639     if ((result != NULL) && (lib != NULL) && (lib->freef != NULL))
8640         lib->freef(lib->data, result);
8641     return (ret);
8642 }
8643 
8644 /**
8645  * xmlRelaxNGNextValue:
8646  * @ctxt:  a Relax-NG validation context
8647  *
8648  * Skip to the next value when validating within a list
8649  *
8650  * Returns 0 if the operation succeeded or an error code.
8651  */
8652 static int
xmlRelaxNGNextValue(xmlRelaxNGValidCtxtPtr ctxt)8653 xmlRelaxNGNextValue(xmlRelaxNGValidCtxtPtr ctxt)
8654 {
8655     xmlChar *cur;
8656 
8657     cur = ctxt->state->value;
8658     if ((cur == NULL) || (ctxt->state->endvalue == NULL)) {
8659         ctxt->state->value = NULL;
8660         ctxt->state->endvalue = NULL;
8661         return (0);
8662     }
8663     while (*cur != 0)
8664         cur++;
8665     while ((cur != ctxt->state->endvalue) && (*cur == 0))
8666         cur++;
8667     if (cur == ctxt->state->endvalue)
8668         ctxt->state->value = NULL;
8669     else
8670         ctxt->state->value = cur;
8671     return (0);
8672 }
8673 
8674 /**
8675  * xmlRelaxNGValidateValueList:
8676  * @ctxt:  a Relax-NG validation context
8677  * @defines:  the list of definitions to verify
8678  *
8679  * Validate the given set of definitions for the current value
8680  *
8681  * Returns 0 if the validation succeeded or an error code.
8682  */
8683 static int
xmlRelaxNGValidateValueList(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr defines)8684 xmlRelaxNGValidateValueList(xmlRelaxNGValidCtxtPtr ctxt,
8685                             xmlRelaxNGDefinePtr defines)
8686 {
8687     int ret = 0;
8688 
8689     while (defines != NULL) {
8690         ret = xmlRelaxNGValidateValue(ctxt, defines);
8691         if (ret != 0)
8692             break;
8693         defines = defines->next;
8694     }
8695     return (ret);
8696 }
8697 
8698 /**
8699  * xmlRelaxNGValidateValue:
8700  * @ctxt:  a Relax-NG validation context
8701  * @define:  the definition to verify
8702  *
8703  * Validate the given definition for the current value
8704  *
8705  * Returns 0 if the validation succeeded or an error code.
8706  */
8707 static int
xmlRelaxNGValidateValue(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define)8708 xmlRelaxNGValidateValue(xmlRelaxNGValidCtxtPtr ctxt,
8709                         xmlRelaxNGDefinePtr define)
8710 {
8711     int ret = 0, oldflags;
8712     xmlChar *value;
8713 
8714     value = ctxt->state->value;
8715     switch (define->type) {
8716         case XML_RELAXNG_EMPTY:{
8717                 if ((value != NULL) && (value[0] != 0)) {
8718                     int idx = 0;
8719 
8720                     while (IS_BLANK_CH(value[idx]))
8721                         idx++;
8722                     if (value[idx] != 0)
8723                         ret = -1;
8724                 }
8725                 break;
8726             }
8727         case XML_RELAXNG_TEXT:
8728             break;
8729         case XML_RELAXNG_VALUE:{
8730                 if (!xmlStrEqual(value, define->value)) {
8731                     if (define->name != NULL) {
8732                         xmlRelaxNGTypeLibraryPtr lib;
8733 
8734                         lib = (xmlRelaxNGTypeLibraryPtr) define->data;
8735                         if ((lib != NULL) && (lib->comp != NULL)) {
8736                             ret = lib->comp(lib->data, define->name,
8737                                             define->value, define->node,
8738                                             (void *) define->attrs,
8739                                             value, ctxt->state->node);
8740                         } else
8741                             ret = -1;
8742                         if (ret < 0) {
8743                             VALID_ERR2(XML_RELAXNG_ERR_TYPECMP,
8744                                        define->name);
8745                             return (-1);
8746                         } else if (ret == 1) {
8747                             ret = 0;
8748                         } else {
8749                             ret = -1;
8750                         }
8751                     } else {
8752                         xmlChar *nval, *nvalue;
8753 
8754                         /*
8755                          * TODO: trivial optimizations are possible by
8756                          * computing at compile-time
8757                          */
8758                         nval = xmlRelaxNGNormalize(ctxt, define->value);
8759                         nvalue = xmlRelaxNGNormalize(ctxt, value);
8760 
8761                         if ((nval == NULL) || (nvalue == NULL) ||
8762                             (!xmlStrEqual(nval, nvalue)))
8763                             ret = -1;
8764                         if (nval != NULL)
8765                             xmlFree(nval);
8766                         if (nvalue != NULL)
8767                             xmlFree(nvalue);
8768                     }
8769                 }
8770                 if (ret == 0)
8771                     xmlRelaxNGNextValue(ctxt);
8772                 break;
8773             }
8774         case XML_RELAXNG_DATATYPE:{
8775                 ret = xmlRelaxNGValidateDatatype(ctxt, value, define,
8776                                                  ctxt->state->seq);
8777                 if (ret == 0)
8778                     xmlRelaxNGNextValue(ctxt);
8779 
8780                 break;
8781             }
8782         case XML_RELAXNG_CHOICE:{
8783                 xmlRelaxNGDefinePtr list = define->content;
8784                 xmlChar *oldvalue;
8785 
8786                 oldflags = ctxt->flags;
8787                 ctxt->flags |= FLAGS_IGNORABLE;
8788 
8789                 oldvalue = ctxt->state->value;
8790                 while (list != NULL) {
8791                     ret = xmlRelaxNGValidateValue(ctxt, list);
8792                     if (ret == 0) {
8793                         break;
8794                     }
8795                     ctxt->state->value = oldvalue;
8796                     list = list->next;
8797                 }
8798                 ctxt->flags = oldflags;
8799                 if (ret != 0) {
8800                     if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
8801                         xmlRelaxNGDumpValidError(ctxt);
8802                 } else {
8803                     if (ctxt->errNr > 0)
8804                         xmlRelaxNGPopErrors(ctxt, 0);
8805                 }
8806                 break;
8807             }
8808         case XML_RELAXNG_LIST:{
8809                 xmlRelaxNGDefinePtr list = define->content;
8810                 xmlChar *oldvalue, *oldend, *val, *cur;
8811 
8812 #ifdef DEBUG_LIST
8813                 int nb_values = 0;
8814 #endif
8815 
8816                 oldvalue = ctxt->state->value;
8817                 oldend = ctxt->state->endvalue;
8818 
8819                 val = xmlStrdup(oldvalue);
8820                 if (val == NULL) {
8821                     val = xmlStrdup(BAD_CAST "");
8822                 }
8823                 if (val == NULL) {
8824                     VALID_ERR(XML_RELAXNG_ERR_NOSTATE);
8825                     return (-1);
8826                 }
8827                 cur = val;
8828                 while (*cur != 0) {
8829                     if (IS_BLANK_CH(*cur)) {
8830                         *cur = 0;
8831                         cur++;
8832 #ifdef DEBUG_LIST
8833                         nb_values++;
8834 #endif
8835                         while (IS_BLANK_CH(*cur))
8836                             *cur++ = 0;
8837                     } else
8838                         cur++;
8839                 }
8840 #ifdef DEBUG_LIST
8841                 xmlGenericError(xmlGenericErrorContext,
8842                                 "list value: '%s' found %d items\n",
8843                                 oldvalue, nb_values);
8844                 nb_values = 0;
8845 #endif
8846                 ctxt->state->endvalue = cur;
8847                 cur = val;
8848                 while ((*cur == 0) && (cur != ctxt->state->endvalue))
8849                     cur++;
8850 
8851                 ctxt->state->value = cur;
8852 
8853                 while (list != NULL) {
8854                     if (ctxt->state->value == ctxt->state->endvalue)
8855                         ctxt->state->value = NULL;
8856                     ret = xmlRelaxNGValidateValue(ctxt, list);
8857                     if (ret != 0) {
8858 #ifdef DEBUG_LIST
8859                         xmlGenericError(xmlGenericErrorContext,
8860                                         "Failed to validate value: '%s' with %d rule\n",
8861                                         ctxt->state->value, nb_values);
8862 #endif
8863                         break;
8864                     }
8865 #ifdef DEBUG_LIST
8866                     nb_values++;
8867 #endif
8868                     list = list->next;
8869                 }
8870 
8871                 if ((ret == 0) && (ctxt->state->value != NULL) &&
8872                     (ctxt->state->value != ctxt->state->endvalue)) {
8873                     VALID_ERR2(XML_RELAXNG_ERR_LISTEXTRA,
8874                                ctxt->state->value);
8875                     ret = -1;
8876                 }
8877                 xmlFree(val);
8878                 ctxt->state->value = oldvalue;
8879                 ctxt->state->endvalue = oldend;
8880                 break;
8881             }
8882         case XML_RELAXNG_ONEORMORE:
8883             ret = xmlRelaxNGValidateValueList(ctxt, define->content);
8884             if (ret != 0) {
8885                 break;
8886             }
8887             /* no break on purpose */
8888         case XML_RELAXNG_ZEROORMORE:{
8889                 xmlChar *cur, *temp;
8890 
8891                 if ((ctxt->state->value == NULL) ||
8892                     (*ctxt->state->value == 0)) {
8893                     ret = 0;
8894                     break;
8895                 }
8896                 oldflags = ctxt->flags;
8897                 ctxt->flags |= FLAGS_IGNORABLE;
8898                 cur = ctxt->state->value;
8899                 temp = NULL;
8900                 while ((cur != NULL) && (cur != ctxt->state->endvalue) &&
8901                        (temp != cur)) {
8902                     temp = cur;
8903                     ret =
8904                         xmlRelaxNGValidateValueList(ctxt, define->content);
8905                     if (ret != 0) {
8906                         ctxt->state->value = temp;
8907                         ret = 0;
8908                         break;
8909                     }
8910                     cur = ctxt->state->value;
8911                 }
8912                 ctxt->flags = oldflags;
8913 		if (ctxt->errNr > 0)
8914 		    xmlRelaxNGPopErrors(ctxt, 0);
8915                 break;
8916             }
8917         case XML_RELAXNG_OPTIONAL:{
8918                 xmlChar *temp;
8919 
8920                 if ((ctxt->state->value == NULL) ||
8921                     (*ctxt->state->value == 0)) {
8922                     ret = 0;
8923                     break;
8924                 }
8925                 oldflags = ctxt->flags;
8926                 ctxt->flags |= FLAGS_IGNORABLE;
8927                 temp = ctxt->state->value;
8928                 ret = xmlRelaxNGValidateValue(ctxt, define->content);
8929                 ctxt->flags = oldflags;
8930                 if (ret != 0) {
8931                     ctxt->state->value = temp;
8932                     if (ctxt->errNr > 0)
8933                         xmlRelaxNGPopErrors(ctxt, 0);
8934                     ret = 0;
8935                     break;
8936                 }
8937 		if (ctxt->errNr > 0)
8938 		    xmlRelaxNGPopErrors(ctxt, 0);
8939                 break;
8940             }
8941         case XML_RELAXNG_EXCEPT:{
8942                 xmlRelaxNGDefinePtr list;
8943 
8944                 list = define->content;
8945                 while (list != NULL) {
8946                     ret = xmlRelaxNGValidateValue(ctxt, list);
8947                     if (ret == 0) {
8948                         ret = -1;
8949                         break;
8950                     } else
8951                         ret = 0;
8952                     list = list->next;
8953                 }
8954                 break;
8955             }
8956         case XML_RELAXNG_DEF:
8957         case XML_RELAXNG_GROUP:{
8958                 xmlRelaxNGDefinePtr list;
8959 
8960                 list = define->content;
8961                 while (list != NULL) {
8962                     ret = xmlRelaxNGValidateValue(ctxt, list);
8963                     if (ret != 0) {
8964                         ret = -1;
8965                         break;
8966                     } else
8967                         ret = 0;
8968                     list = list->next;
8969                 }
8970                 break;
8971             }
8972         case XML_RELAXNG_REF:
8973         case XML_RELAXNG_PARENTREF:
8974 	    if (define->content == NULL) {
8975                 VALID_ERR(XML_RELAXNG_ERR_NODEFINE);
8976                 ret = -1;
8977 	    } else {
8978                 ret = xmlRelaxNGValidateValue(ctxt, define->content);
8979             }
8980             break;
8981         default:
8982             TODO ret = -1;
8983     }
8984     return (ret);
8985 }
8986 
8987 /**
8988  * xmlRelaxNGValidateValueContent:
8989  * @ctxt:  a Relax-NG validation context
8990  * @defines:  the list of definitions to verify
8991  *
8992  * Validate the given definitions for the current value
8993  *
8994  * Returns 0 if the validation succeeded or an error code.
8995  */
8996 static int
xmlRelaxNGValidateValueContent(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr defines)8997 xmlRelaxNGValidateValueContent(xmlRelaxNGValidCtxtPtr ctxt,
8998                                xmlRelaxNGDefinePtr defines)
8999 {
9000     int ret = 0;
9001 
9002     while (defines != NULL) {
9003         ret = xmlRelaxNGValidateValue(ctxt, defines);
9004         if (ret != 0)
9005             break;
9006         defines = defines->next;
9007     }
9008     return (ret);
9009 }
9010 
9011 /**
9012  * xmlRelaxNGAttributeMatch:
9013  * @ctxt:  a Relax-NG validation context
9014  * @define:  the definition to check
9015  * @prop:  the attribute
9016  *
9017  * Check if the attribute matches the definition nameClass
9018  *
9019  * Returns 1 if the attribute matches, 0 if no, or -1 in case of error
9020  */
9021 static int
xmlRelaxNGAttributeMatch(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define,xmlAttrPtr prop)9022 xmlRelaxNGAttributeMatch(xmlRelaxNGValidCtxtPtr ctxt,
9023                          xmlRelaxNGDefinePtr define, xmlAttrPtr prop)
9024 {
9025     int ret;
9026 
9027     if (define->name != NULL) {
9028         if (!xmlStrEqual(define->name, prop->name))
9029             return (0);
9030     }
9031     if (define->ns != NULL) {
9032         if (define->ns[0] == 0) {
9033             if (prop->ns != NULL)
9034                 return (0);
9035         } else {
9036             if ((prop->ns == NULL) ||
9037                 (!xmlStrEqual(define->ns, prop->ns->href)))
9038                 return (0);
9039         }
9040     }
9041     if (define->nameClass == NULL)
9042         return (1);
9043     define = define->nameClass;
9044     if (define->type == XML_RELAXNG_EXCEPT) {
9045         xmlRelaxNGDefinePtr list;
9046 
9047         list = define->content;
9048         while (list != NULL) {
9049             ret = xmlRelaxNGAttributeMatch(ctxt, list, prop);
9050             if (ret == 1)
9051                 return (0);
9052             if (ret < 0)
9053                 return (ret);
9054             list = list->next;
9055         }
9056     } else if (define->type == XML_RELAXNG_CHOICE) {
9057         xmlRelaxNGDefinePtr list;
9058 
9059         list = define->nameClass;
9060         while (list != NULL) {
9061             ret = xmlRelaxNGAttributeMatch(ctxt, list, prop);
9062             if (ret == 1)
9063                 return (1);
9064             if (ret < 0)
9065                 return (ret);
9066             list = list->next;
9067         }
9068         return (0);
9069     } else {
9070     TODO}
9071     return (1);
9072 }
9073 
9074 /**
9075  * xmlRelaxNGValidateAttribute:
9076  * @ctxt:  a Relax-NG validation context
9077  * @define:  the definition to verify
9078  *
9079  * Validate the given attribute definition for that node
9080  *
9081  * Returns 0 if the validation succeeded or an error code.
9082  */
9083 static int
xmlRelaxNGValidateAttribute(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define)9084 xmlRelaxNGValidateAttribute(xmlRelaxNGValidCtxtPtr ctxt,
9085                             xmlRelaxNGDefinePtr define)
9086 {
9087     int ret = 0, i;
9088     xmlChar *value, *oldvalue;
9089     xmlAttrPtr prop = NULL, tmp;
9090     xmlNodePtr oldseq;
9091 
9092     if (ctxt->state->nbAttrLeft <= 0)
9093         return (-1);
9094     if (define->name != NULL) {
9095         for (i = 0; i < ctxt->state->nbAttrs; i++) {
9096             tmp = ctxt->state->attrs[i];
9097             if ((tmp != NULL) && (xmlStrEqual(define->name, tmp->name))) {
9098                 if ((((define->ns == NULL) || (define->ns[0] == 0)) &&
9099                      (tmp->ns == NULL)) ||
9100                     ((tmp->ns != NULL) &&
9101                      (xmlStrEqual(define->ns, tmp->ns->href)))) {
9102                     prop = tmp;
9103                     break;
9104                 }
9105             }
9106         }
9107         if (prop != NULL) {
9108             value = xmlNodeListGetString(prop->doc, prop->children, 1);
9109             oldvalue = ctxt->state->value;
9110             oldseq = ctxt->state->seq;
9111             ctxt->state->seq = (xmlNodePtr) prop;
9112             ctxt->state->value = value;
9113             ctxt->state->endvalue = NULL;
9114             ret = xmlRelaxNGValidateValueContent(ctxt, define->content);
9115             if (ctxt->state->value != NULL)
9116                 value = ctxt->state->value;
9117             if (value != NULL)
9118                 xmlFree(value);
9119             ctxt->state->value = oldvalue;
9120             ctxt->state->seq = oldseq;
9121             if (ret == 0) {
9122                 /*
9123                  * flag the attribute as processed
9124                  */
9125                 ctxt->state->attrs[i] = NULL;
9126                 ctxt->state->nbAttrLeft--;
9127             }
9128         } else {
9129             ret = -1;
9130         }
9131 #ifdef DEBUG
9132         xmlGenericError(xmlGenericErrorContext,
9133                         "xmlRelaxNGValidateAttribute(%s): %d\n",
9134                         define->name, ret);
9135 #endif
9136     } else {
9137         for (i = 0; i < ctxt->state->nbAttrs; i++) {
9138             tmp = ctxt->state->attrs[i];
9139             if ((tmp != NULL) &&
9140                 (xmlRelaxNGAttributeMatch(ctxt, define, tmp) == 1)) {
9141                 prop = tmp;
9142                 break;
9143             }
9144         }
9145         if (prop != NULL) {
9146             value = xmlNodeListGetString(prop->doc, prop->children, 1);
9147             oldvalue = ctxt->state->value;
9148             oldseq = ctxt->state->seq;
9149             ctxt->state->seq = (xmlNodePtr) prop;
9150             ctxt->state->value = value;
9151             ret = xmlRelaxNGValidateValueContent(ctxt, define->content);
9152             if (ctxt->state->value != NULL)
9153                 value = ctxt->state->value;
9154             if (value != NULL)
9155                 xmlFree(value);
9156             ctxt->state->value = oldvalue;
9157             ctxt->state->seq = oldseq;
9158             if (ret == 0) {
9159                 /*
9160                  * flag the attribute as processed
9161                  */
9162                 ctxt->state->attrs[i] = NULL;
9163                 ctxt->state->nbAttrLeft--;
9164             }
9165         } else {
9166             ret = -1;
9167         }
9168 #ifdef DEBUG
9169         if (define->ns != NULL) {
9170             xmlGenericError(xmlGenericErrorContext,
9171                             "xmlRelaxNGValidateAttribute(nsName ns = %s): %d\n",
9172                             define->ns, ret);
9173         } else {
9174             xmlGenericError(xmlGenericErrorContext,
9175                             "xmlRelaxNGValidateAttribute(anyName): %d\n",
9176                             ret);
9177         }
9178 #endif
9179     }
9180 
9181     return (ret);
9182 }
9183 
9184 /**
9185  * xmlRelaxNGValidateAttributeList:
9186  * @ctxt:  a Relax-NG validation context
9187  * @define:  the list of definition to verify
9188  *
9189  * Validate the given node against the list of attribute definitions
9190  *
9191  * Returns 0 if the validation succeeded or an error code.
9192  */
9193 static int
xmlRelaxNGValidateAttributeList(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr defines)9194 xmlRelaxNGValidateAttributeList(xmlRelaxNGValidCtxtPtr ctxt,
9195                                 xmlRelaxNGDefinePtr defines)
9196 {
9197     int ret = 0, res;
9198     int needmore = 0;
9199     xmlRelaxNGDefinePtr cur;
9200 
9201     cur = defines;
9202     while (cur != NULL) {
9203         if (cur->type == XML_RELAXNG_ATTRIBUTE) {
9204             if (xmlRelaxNGValidateAttribute(ctxt, cur) != 0)
9205                 ret = -1;
9206         } else
9207             needmore = 1;
9208         cur = cur->next;
9209     }
9210     if (!needmore)
9211         return (ret);
9212     cur = defines;
9213     while (cur != NULL) {
9214         if (cur->type != XML_RELAXNG_ATTRIBUTE) {
9215             if ((ctxt->state != NULL) || (ctxt->states != NULL)) {
9216                 res = xmlRelaxNGValidateDefinition(ctxt, cur);
9217                 if (res < 0)
9218                     ret = -1;
9219             } else {
9220                 VALID_ERR(XML_RELAXNG_ERR_NOSTATE);
9221                 return (-1);
9222             }
9223             if (res == -1)      /* continues on -2 */
9224                 break;
9225         }
9226         cur = cur->next;
9227     }
9228 
9229     return (ret);
9230 }
9231 
9232 /**
9233  * xmlRelaxNGNodeMatchesList:
9234  * @node:  the node
9235  * @list:  a NULL terminated array of definitions
9236  *
9237  * Check if a node can be matched by one of the definitions
9238  *
9239  * Returns 1 if matches 0 otherwise
9240  */
9241 static int
xmlRelaxNGNodeMatchesList(xmlNodePtr node,xmlRelaxNGDefinePtr * list)9242 xmlRelaxNGNodeMatchesList(xmlNodePtr node, xmlRelaxNGDefinePtr * list)
9243 {
9244     xmlRelaxNGDefinePtr cur;
9245     int i = 0, tmp;
9246 
9247     if ((node == NULL) || (list == NULL))
9248         return (0);
9249 
9250     cur = list[i++];
9251     while (cur != NULL) {
9252         if ((node->type == XML_ELEMENT_NODE) &&
9253             (cur->type == XML_RELAXNG_ELEMENT)) {
9254             tmp = xmlRelaxNGElementMatch(NULL, cur, node);
9255             if (tmp == 1)
9256                 return (1);
9257         } else if (((node->type == XML_TEXT_NODE) ||
9258                     (node->type == XML_CDATA_SECTION_NODE)) &&
9259                    (cur->type == XML_RELAXNG_TEXT)) {
9260             return (1);
9261         }
9262         cur = list[i++];
9263     }
9264     return (0);
9265 }
9266 
9267 /**
9268  * xmlRelaxNGValidateInterleave:
9269  * @ctxt:  a Relax-NG validation context
9270  * @define:  the definition to verify
9271  *
9272  * Validate an interleave definition for a node.
9273  *
9274  * Returns 0 if the validation succeeded or an error code.
9275  */
9276 static int
xmlRelaxNGValidateInterleave(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define)9277 xmlRelaxNGValidateInterleave(xmlRelaxNGValidCtxtPtr ctxt,
9278                              xmlRelaxNGDefinePtr define)
9279 {
9280     int ret = 0, i, nbgroups;
9281     int errNr = ctxt->errNr;
9282     int oldflags;
9283 
9284     xmlRelaxNGValidStatePtr oldstate;
9285     xmlRelaxNGPartitionPtr partitions;
9286     xmlRelaxNGInterleaveGroupPtr group = NULL;
9287     xmlNodePtr cur, start, last = NULL, lastchg = NULL, lastelem;
9288     xmlNodePtr *list = NULL, *lasts = NULL;
9289 
9290     if (define->data != NULL) {
9291         partitions = (xmlRelaxNGPartitionPtr) define->data;
9292         nbgroups = partitions->nbgroups;
9293     } else {
9294         VALID_ERR(XML_RELAXNG_ERR_INTERNODATA);
9295         return (-1);
9296     }
9297     /*
9298      * Optimizations for MIXED
9299      */
9300     oldflags = ctxt->flags;
9301     if (define->dflags & IS_MIXED) {
9302         ctxt->flags |= FLAGS_MIXED_CONTENT;
9303         if (nbgroups == 2) {
9304             /*
9305              * this is a pure <mixed> case
9306              */
9307             if (ctxt->state != NULL)
9308                 ctxt->state->seq = xmlRelaxNGSkipIgnored(ctxt,
9309                                                          ctxt->state->seq);
9310             if (partitions->groups[0]->rule->type == XML_RELAXNG_TEXT)
9311                 ret = xmlRelaxNGValidateDefinition(ctxt,
9312                                                    partitions->groups[1]->
9313                                                    rule);
9314             else
9315                 ret = xmlRelaxNGValidateDefinition(ctxt,
9316                                                    partitions->groups[0]->
9317                                                    rule);
9318             if (ret == 0) {
9319                 if (ctxt->state != NULL)
9320                     ctxt->state->seq = xmlRelaxNGSkipIgnored(ctxt,
9321                                                              ctxt->state->
9322                                                              seq);
9323             }
9324             ctxt->flags = oldflags;
9325             return (ret);
9326         }
9327     }
9328 
9329     /*
9330      * Build arrays to store the first and last node of the chain
9331      * pertaining to each group
9332      */
9333     list = (xmlNodePtr *) xmlMalloc(nbgroups * sizeof(xmlNodePtr));
9334     if (list == NULL) {
9335         xmlRngVErrMemory(ctxt, "validating\n");
9336         return (-1);
9337     }
9338     memset(list, 0, nbgroups * sizeof(xmlNodePtr));
9339     lasts = (xmlNodePtr *) xmlMalloc(nbgroups * sizeof(xmlNodePtr));
9340     if (lasts == NULL) {
9341         xmlRngVErrMemory(ctxt, "validating\n");
9342         return (-1);
9343     }
9344     memset(lasts, 0, nbgroups * sizeof(xmlNodePtr));
9345 
9346     /*
9347      * Walk the sequence of children finding the right group and
9348      * sorting them in sequences.
9349      */
9350     cur = ctxt->state->seq;
9351     cur = xmlRelaxNGSkipIgnored(ctxt, cur);
9352     start = cur;
9353     while (cur != NULL) {
9354         ctxt->state->seq = cur;
9355         if ((partitions->triage != NULL) &&
9356             (partitions->flags & IS_DETERMINIST)) {
9357             void *tmp = NULL;
9358 
9359             if ((cur->type == XML_TEXT_NODE) ||
9360                 (cur->type == XML_CDATA_SECTION_NODE)) {
9361                 tmp = xmlHashLookup2(partitions->triage, BAD_CAST "#text",
9362                                      NULL);
9363             } else if (cur->type == XML_ELEMENT_NODE) {
9364                 if (cur->ns != NULL) {
9365                     tmp = xmlHashLookup2(partitions->triage, cur->name,
9366                                          cur->ns->href);
9367                     if (tmp == NULL)
9368                         tmp = xmlHashLookup2(partitions->triage,
9369                                              BAD_CAST "#any",
9370                                              cur->ns->href);
9371                 } else
9372                     tmp =
9373                         xmlHashLookup2(partitions->triage, cur->name,
9374                                        NULL);
9375                 if (tmp == NULL)
9376                     tmp =
9377                         xmlHashLookup2(partitions->triage, BAD_CAST "#any",
9378                                        NULL);
9379             }
9380 
9381             if (tmp == NULL) {
9382                 i = nbgroups;
9383             } else {
9384                 i = ((long) tmp) - 1;
9385                 if (partitions->flags & IS_NEEDCHECK) {
9386                     group = partitions->groups[i];
9387                     if (!xmlRelaxNGNodeMatchesList(cur, group->defs))
9388                         i = nbgroups;
9389                 }
9390             }
9391         } else {
9392             for (i = 0; i < nbgroups; i++) {
9393                 group = partitions->groups[i];
9394                 if (group == NULL)
9395                     continue;
9396                 if (xmlRelaxNGNodeMatchesList(cur, group->defs))
9397                     break;
9398             }
9399         }
9400         /*
9401          * We break as soon as an element not matched is found
9402          */
9403         if (i >= nbgroups) {
9404             break;
9405         }
9406         if (lasts[i] != NULL) {
9407             lasts[i]->next = cur;
9408             lasts[i] = cur;
9409         } else {
9410             list[i] = cur;
9411             lasts[i] = cur;
9412         }
9413         if (cur->next != NULL)
9414             lastchg = cur->next;
9415         else
9416             lastchg = cur;
9417         cur = xmlRelaxNGSkipIgnored(ctxt, cur->next);
9418     }
9419     if (ret != 0) {
9420         VALID_ERR(XML_RELAXNG_ERR_INTERSEQ);
9421         ret = -1;
9422         goto done;
9423     }
9424     lastelem = cur;
9425     oldstate = ctxt->state;
9426     for (i = 0; i < nbgroups; i++) {
9427         ctxt->state = xmlRelaxNGCopyValidState(ctxt, oldstate);
9428 	if (ctxt->state == NULL) {
9429 	    ret = -1;
9430 	    break;
9431 	}
9432         group = partitions->groups[i];
9433         if (lasts[i] != NULL) {
9434             last = lasts[i]->next;
9435             lasts[i]->next = NULL;
9436         }
9437         ctxt->state->seq = list[i];
9438         ret = xmlRelaxNGValidateDefinition(ctxt, group->rule);
9439         if (ret != 0)
9440             break;
9441         if (ctxt->state != NULL) {
9442             cur = ctxt->state->seq;
9443             cur = xmlRelaxNGSkipIgnored(ctxt, cur);
9444             xmlRelaxNGFreeValidState(ctxt, oldstate);
9445             oldstate = ctxt->state;
9446             ctxt->state = NULL;
9447             if (cur != NULL) {
9448                 VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, cur->name);
9449                 ret = -1;
9450                 ctxt->state = oldstate;
9451                 goto done;
9452             }
9453         } else if (ctxt->states != NULL) {
9454             int j;
9455             int found = 0;
9456 	    int best = -1;
9457 	    int lowattr = -1;
9458 
9459 	    /*
9460 	     * PBM: what happen if there is attributes checks in the interleaves
9461 	     */
9462 
9463             for (j = 0; j < ctxt->states->nbState; j++) {
9464                 cur = ctxt->states->tabState[j]->seq;
9465                 cur = xmlRelaxNGSkipIgnored(ctxt, cur);
9466                 if (cur == NULL) {
9467 		    if (found == 0) {
9468 		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
9469 			best = j;
9470 		    }
9471                     found = 1;
9472 		    if (ctxt->states->tabState[j]->nbAttrLeft <= lowattr) {
9473 		        /* try  to keep the latest one to mach old heuristic */
9474 		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
9475 			best = j;
9476 		    }
9477                     if (lowattr == 0)
9478 		        break;
9479                 } else if (found == 0) {
9480                     if (lowattr == -1) {
9481 		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
9482 			best = j;
9483 		    } else
9484 		    if (ctxt->states->tabState[j]->nbAttrLeft <= lowattr)  {
9485 		        /* try  to keep the latest one to mach old heuristic */
9486 		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
9487 			best = j;
9488 		    }
9489 		}
9490             }
9491 	    /*
9492 	     * BIG PBM: here we pick only one restarting point :-(
9493 	     */
9494             if (ctxt->states->nbState > 0) {
9495                 xmlRelaxNGFreeValidState(ctxt, oldstate);
9496 		if (best != -1) {
9497 		    oldstate = ctxt->states->tabState[best];
9498 		    ctxt->states->tabState[best] = NULL;
9499 		} else {
9500 		    oldstate =
9501 			ctxt->states->tabState[ctxt->states->nbState - 1];
9502                     ctxt->states->tabState[ctxt->states->nbState - 1] = NULL;
9503                     ctxt->states->nbState--;
9504 		}
9505             }
9506             for (j = 0; j < ctxt->states->nbState ; j++) {
9507                 xmlRelaxNGFreeValidState(ctxt, ctxt->states->tabState[j]);
9508             }
9509             xmlRelaxNGFreeStates(ctxt, ctxt->states);
9510             ctxt->states = NULL;
9511             if (found == 0) {
9512                 if (cur == NULL) {
9513 		    VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA,
9514 			       (const xmlChar *) "noname");
9515                 } else {
9516                     VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, cur->name);
9517                 }
9518                 ret = -1;
9519                 ctxt->state = oldstate;
9520                 goto done;
9521             }
9522         } else {
9523             ret = -1;
9524             break;
9525         }
9526         if (lasts[i] != NULL) {
9527             lasts[i]->next = last;
9528         }
9529     }
9530     if (ctxt->state != NULL)
9531         xmlRelaxNGFreeValidState(ctxt, ctxt->state);
9532     ctxt->state = oldstate;
9533     ctxt->state->seq = lastelem;
9534     if (ret != 0) {
9535         VALID_ERR(XML_RELAXNG_ERR_INTERSEQ);
9536         ret = -1;
9537         goto done;
9538     }
9539 
9540   done:
9541     ctxt->flags = oldflags;
9542     /*
9543      * builds the next links chain from the prev one
9544      */
9545     cur = lastchg;
9546     while (cur != NULL) {
9547         if ((cur == start) || (cur->prev == NULL))
9548             break;
9549         cur->prev->next = cur;
9550         cur = cur->prev;
9551     }
9552     if (ret == 0) {
9553         if (ctxt->errNr > errNr)
9554             xmlRelaxNGPopErrors(ctxt, errNr);
9555     }
9556 
9557     xmlFree(list);
9558     xmlFree(lasts);
9559     return (ret);
9560 }
9561 
9562 /**
9563  * xmlRelaxNGValidateDefinitionList:
9564  * @ctxt:  a Relax-NG validation context
9565  * @define:  the list of definition to verify
9566  *
9567  * Validate the given node content against the (list) of definitions
9568  *
9569  * Returns 0 if the validation succeeded or an error code.
9570  */
9571 static int
xmlRelaxNGValidateDefinitionList(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr defines)9572 xmlRelaxNGValidateDefinitionList(xmlRelaxNGValidCtxtPtr ctxt,
9573                                  xmlRelaxNGDefinePtr defines)
9574 {
9575     int ret = 0, res;
9576 
9577 
9578     if (defines == NULL) {
9579         VALID_ERR2(XML_RELAXNG_ERR_INTERNAL,
9580                    BAD_CAST "NULL definition list");
9581         return (-1);
9582     }
9583     while (defines != NULL) {
9584         if ((ctxt->state != NULL) || (ctxt->states != NULL)) {
9585             res = xmlRelaxNGValidateDefinition(ctxt, defines);
9586             if (res < 0)
9587                 ret = -1;
9588         } else {
9589             VALID_ERR(XML_RELAXNG_ERR_NOSTATE);
9590             return (-1);
9591         }
9592         if (res == -1)          /* continues on -2 */
9593             break;
9594         defines = defines->next;
9595     }
9596 
9597     return (ret);
9598 }
9599 
9600 /**
9601  * xmlRelaxNGElementMatch:
9602  * @ctxt:  a Relax-NG validation context
9603  * @define:  the definition to check
9604  * @elem:  the element
9605  *
9606  * Check if the element matches the definition nameClass
9607  *
9608  * Returns 1 if the element matches, 0 if no, or -1 in case of error
9609  */
9610 static int
xmlRelaxNGElementMatch(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define,xmlNodePtr elem)9611 xmlRelaxNGElementMatch(xmlRelaxNGValidCtxtPtr ctxt,
9612                        xmlRelaxNGDefinePtr define, xmlNodePtr elem)
9613 {
9614     int ret = 0, oldflags = 0;
9615 
9616     if (define->name != NULL) {
9617         if (!xmlStrEqual(elem->name, define->name)) {
9618             VALID_ERR3(XML_RELAXNG_ERR_ELEMNAME, define->name, elem->name);
9619             return (0);
9620         }
9621     }
9622     if ((define->ns != NULL) && (define->ns[0] != 0)) {
9623         if (elem->ns == NULL) {
9624             VALID_ERR2(XML_RELAXNG_ERR_ELEMNONS, elem->name);
9625             return (0);
9626         } else if (!xmlStrEqual(elem->ns->href, define->ns)) {
9627             VALID_ERR3(XML_RELAXNG_ERR_ELEMWRONGNS,
9628                        elem->name, define->ns);
9629             return (0);
9630         }
9631     } else if ((elem->ns != NULL) && (define->ns != NULL) &&
9632                (define->name == NULL)) {
9633         VALID_ERR2(XML_RELAXNG_ERR_ELEMEXTRANS, elem->name);
9634         return (0);
9635     } else if ((elem->ns != NULL) && (define->name != NULL)) {
9636         VALID_ERR2(XML_RELAXNG_ERR_ELEMEXTRANS, define->name);
9637         return (0);
9638     }
9639 
9640     if (define->nameClass == NULL)
9641         return (1);
9642 
9643     define = define->nameClass;
9644     if (define->type == XML_RELAXNG_EXCEPT) {
9645         xmlRelaxNGDefinePtr list;
9646 
9647         if (ctxt != NULL) {
9648             oldflags = ctxt->flags;
9649             ctxt->flags |= FLAGS_IGNORABLE;
9650         }
9651 
9652         list = define->content;
9653         while (list != NULL) {
9654             ret = xmlRelaxNGElementMatch(ctxt, list, elem);
9655             if (ret == 1) {
9656                 if (ctxt != NULL)
9657                     ctxt->flags = oldflags;
9658                 return (0);
9659             }
9660             if (ret < 0) {
9661                 if (ctxt != NULL)
9662                     ctxt->flags = oldflags;
9663                 return (ret);
9664             }
9665             list = list->next;
9666         }
9667         ret = 1;
9668         if (ctxt != NULL) {
9669             ctxt->flags = oldflags;
9670         }
9671     } else if (define->type == XML_RELAXNG_CHOICE) {
9672         xmlRelaxNGDefinePtr list;
9673 
9674         if (ctxt != NULL) {
9675             oldflags = ctxt->flags;
9676             ctxt->flags |= FLAGS_IGNORABLE;
9677         }
9678 
9679         list = define->nameClass;
9680         while (list != NULL) {
9681             ret = xmlRelaxNGElementMatch(ctxt, list, elem);
9682             if (ret == 1) {
9683                 if (ctxt != NULL)
9684                     ctxt->flags = oldflags;
9685                 return (1);
9686             }
9687             if (ret < 0) {
9688                 if (ctxt != NULL)
9689                     ctxt->flags = oldflags;
9690                 return (ret);
9691             }
9692             list = list->next;
9693         }
9694         if (ctxt != NULL) {
9695             if (ret != 0) {
9696                 if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
9697                     xmlRelaxNGDumpValidError(ctxt);
9698             } else {
9699                 if (ctxt->errNr > 0)
9700                     xmlRelaxNGPopErrors(ctxt, 0);
9701             }
9702         }
9703         ret = 0;
9704         if (ctxt != NULL) {
9705             ctxt->flags = oldflags;
9706         }
9707     } else {
9708         TODO ret = -1;
9709     }
9710     return (ret);
9711 }
9712 
9713 /**
9714  * xmlRelaxNGBestState:
9715  * @ctxt:  a Relax-NG validation context
9716  *
9717  * Find the "best" state in the ctxt->states list of states to report
9718  * errors about. I.e. a state with no element left in the child list
9719  * or the one with the less attributes left.
9720  * This is called only if a falidation error was detected
9721  *
9722  * Returns the index of the "best" state or -1 in case of error
9723  */
9724 static int
xmlRelaxNGBestState(xmlRelaxNGValidCtxtPtr ctxt)9725 xmlRelaxNGBestState(xmlRelaxNGValidCtxtPtr ctxt)
9726 {
9727     xmlRelaxNGValidStatePtr state;
9728     int i, tmp;
9729     int best = -1;
9730     int value = 1000000;
9731 
9732     if ((ctxt == NULL) || (ctxt->states == NULL) ||
9733         (ctxt->states->nbState <= 0))
9734         return (-1);
9735 
9736     for (i = 0; i < ctxt->states->nbState; i++) {
9737         state = ctxt->states->tabState[i];
9738         if (state == NULL)
9739             continue;
9740         if (state->seq != NULL) {
9741             if ((best == -1) || (value > 100000)) {
9742                 value = 100000;
9743                 best = i;
9744             }
9745         } else {
9746             tmp = state->nbAttrLeft;
9747             if ((best == -1) || (value > tmp)) {
9748                 value = tmp;
9749                 best = i;
9750             }
9751         }
9752     }
9753     return (best);
9754 }
9755 
9756 /**
9757  * xmlRelaxNGLogBestError:
9758  * @ctxt:  a Relax-NG validation context
9759  *
9760  * Find the "best" state in the ctxt->states list of states to report
9761  * errors about and log it.
9762  */
9763 static void
xmlRelaxNGLogBestError(xmlRelaxNGValidCtxtPtr ctxt)9764 xmlRelaxNGLogBestError(xmlRelaxNGValidCtxtPtr ctxt)
9765 {
9766     int best;
9767 
9768     if ((ctxt == NULL) || (ctxt->states == NULL) ||
9769         (ctxt->states->nbState <= 0))
9770         return;
9771 
9772     best = xmlRelaxNGBestState(ctxt);
9773     if ((best >= 0) && (best < ctxt->states->nbState)) {
9774         ctxt->state = ctxt->states->tabState[best];
9775 
9776         xmlRelaxNGValidateElementEnd(ctxt, 1);
9777     }
9778 }
9779 
9780 /**
9781  * xmlRelaxNGValidateElementEnd:
9782  * @ctxt:  a Relax-NG validation context
9783  * @dolog:  indicate that error logging should be done
9784  *
9785  * Validate the end of the element, implements check that
9786  * there is nothing left not consumed in the element content
9787  * or in the attribute list.
9788  *
9789  * Returns 0 if the validation succeeded or an error code.
9790  */
9791 static int
xmlRelaxNGValidateElementEnd(xmlRelaxNGValidCtxtPtr ctxt,int dolog)9792 xmlRelaxNGValidateElementEnd(xmlRelaxNGValidCtxtPtr ctxt, int dolog)
9793 {
9794     int i;
9795     xmlRelaxNGValidStatePtr state;
9796 
9797     state = ctxt->state;
9798     if (state->seq != NULL) {
9799         state->seq = xmlRelaxNGSkipIgnored(ctxt, state->seq);
9800         if (state->seq != NULL) {
9801             if (dolog) {
9802                 VALID_ERR3(XML_RELAXNG_ERR_EXTRACONTENT,
9803                            state->node->name, state->seq->name);
9804             }
9805             return (-1);
9806         }
9807     }
9808     for (i = 0; i < state->nbAttrs; i++) {
9809         if (state->attrs[i] != NULL) {
9810             if (dolog) {
9811                 VALID_ERR3(XML_RELAXNG_ERR_INVALIDATTR,
9812                            state->attrs[i]->name, state->node->name);
9813             }
9814             return (-1 - i);
9815         }
9816     }
9817     return (0);
9818 }
9819 
9820 /**
9821  * xmlRelaxNGValidateState:
9822  * @ctxt:  a Relax-NG validation context
9823  * @define:  the definition to verify
9824  *
9825  * Validate the current state against the definition
9826  *
9827  * Returns 0 if the validation succeeded or an error code.
9828  */
9829 static int
xmlRelaxNGValidateState(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define)9830 xmlRelaxNGValidateState(xmlRelaxNGValidCtxtPtr ctxt,
9831                         xmlRelaxNGDefinePtr define)
9832 {
9833     xmlNodePtr node;
9834     int ret = 0, i, tmp, oldflags, errNr;
9835     xmlRelaxNGValidStatePtr oldstate = NULL, state;
9836 
9837     if (define == NULL) {
9838         VALID_ERR(XML_RELAXNG_ERR_NODEFINE);
9839         return (-1);
9840     }
9841 
9842     if (ctxt->state != NULL) {
9843         node = ctxt->state->seq;
9844     } else {
9845         node = NULL;
9846     }
9847 #ifdef DEBUG
9848     for (i = 0; i < ctxt->depth; i++)
9849         xmlGenericError(xmlGenericErrorContext, " ");
9850     xmlGenericError(xmlGenericErrorContext,
9851                     "Start validating %s ", xmlRelaxNGDefName(define));
9852     if (define->name != NULL)
9853         xmlGenericError(xmlGenericErrorContext, "%s ", define->name);
9854     if ((node != NULL) && (node->name != NULL))
9855         xmlGenericError(xmlGenericErrorContext, "on %s\n", node->name);
9856     else
9857         xmlGenericError(xmlGenericErrorContext, "\n");
9858 #endif
9859     ctxt->depth++;
9860     switch (define->type) {
9861         case XML_RELAXNG_EMPTY:
9862             xmlRelaxNGSkipIgnored(ctxt, node);
9863             ret = 0;
9864             break;
9865         case XML_RELAXNG_NOT_ALLOWED:
9866             ret = -1;
9867             break;
9868         case XML_RELAXNG_TEXT:
9869             while ((node != NULL) &&
9870                    ((node->type == XML_TEXT_NODE) ||
9871                     (node->type == XML_COMMENT_NODE) ||
9872                     (node->type == XML_PI_NODE) ||
9873                     (node->type == XML_CDATA_SECTION_NODE)))
9874                 node = node->next;
9875             ctxt->state->seq = node;
9876             break;
9877         case XML_RELAXNG_ELEMENT:
9878             errNr = ctxt->errNr;
9879             node = xmlRelaxNGSkipIgnored(ctxt, node);
9880             if (node == NULL) {
9881                 VALID_ERR2(XML_RELAXNG_ERR_NOELEM, define->name);
9882                 ret = -1;
9883                 if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
9884                     xmlRelaxNGDumpValidError(ctxt);
9885                 break;
9886             }
9887             if (node->type != XML_ELEMENT_NODE) {
9888                 VALID_ERR(XML_RELAXNG_ERR_NOTELEM);
9889                 ret = -1;
9890                 if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
9891                     xmlRelaxNGDumpValidError(ctxt);
9892                 break;
9893             }
9894             /*
9895              * This node was already validated successfully against
9896              * this definition.
9897              */
9898             if (node->psvi == define) {
9899                 ctxt->state->seq = xmlRelaxNGSkipIgnored(ctxt, node->next);
9900                 if (ctxt->errNr > errNr)
9901                     xmlRelaxNGPopErrors(ctxt, errNr);
9902                 if (ctxt->errNr != 0) {
9903                     while ((ctxt->err != NULL) &&
9904                            (((ctxt->err->err == XML_RELAXNG_ERR_ELEMNAME)
9905                              && (xmlStrEqual(ctxt->err->arg2, node->name)))
9906                             ||
9907                             ((ctxt->err->err ==
9908                               XML_RELAXNG_ERR_ELEMEXTRANS)
9909                              && (xmlStrEqual(ctxt->err->arg1, node->name)))
9910                             || (ctxt->err->err == XML_RELAXNG_ERR_NOELEM)
9911                             || (ctxt->err->err ==
9912                                 XML_RELAXNG_ERR_NOTELEM)))
9913                         xmlRelaxNGValidErrorPop(ctxt);
9914                 }
9915                 break;
9916             }
9917 
9918             ret = xmlRelaxNGElementMatch(ctxt, define, node);
9919             if (ret <= 0) {
9920                 ret = -1;
9921                 if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
9922                     xmlRelaxNGDumpValidError(ctxt);
9923                 break;
9924             }
9925             ret = 0;
9926             if (ctxt->errNr != 0) {
9927                 if (ctxt->errNr > errNr)
9928                     xmlRelaxNGPopErrors(ctxt, errNr);
9929                 while ((ctxt->err != NULL) &&
9930                        (((ctxt->err->err == XML_RELAXNG_ERR_ELEMNAME) &&
9931                          (xmlStrEqual(ctxt->err->arg2, node->name))) ||
9932                         ((ctxt->err->err == XML_RELAXNG_ERR_ELEMEXTRANS) &&
9933                          (xmlStrEqual(ctxt->err->arg1, node->name))) ||
9934                         (ctxt->err->err == XML_RELAXNG_ERR_NOELEM) ||
9935                         (ctxt->err->err == XML_RELAXNG_ERR_NOTELEM)))
9936                     xmlRelaxNGValidErrorPop(ctxt);
9937             }
9938             errNr = ctxt->errNr;
9939 
9940             oldflags = ctxt->flags;
9941             if (ctxt->flags & FLAGS_MIXED_CONTENT) {
9942                 ctxt->flags -= FLAGS_MIXED_CONTENT;
9943             }
9944             state = xmlRelaxNGNewValidState(ctxt, node);
9945             if (state == NULL) {
9946                 ret = -1;
9947                 if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
9948                     xmlRelaxNGDumpValidError(ctxt);
9949                 break;
9950             }
9951 
9952             oldstate = ctxt->state;
9953             ctxt->state = state;
9954             if (define->attrs != NULL) {
9955                 tmp = xmlRelaxNGValidateAttributeList(ctxt, define->attrs);
9956                 if (tmp != 0) {
9957                     ret = -1;
9958                     VALID_ERR2(XML_RELAXNG_ERR_ATTRVALID, node->name);
9959                 }
9960             }
9961             if (define->contModel != NULL) {
9962                 xmlRelaxNGValidStatePtr nstate, tmpstate = ctxt->state;
9963                 xmlRelaxNGStatesPtr tmpstates = ctxt->states;
9964                 xmlNodePtr nseq;
9965 
9966                 nstate = xmlRelaxNGNewValidState(ctxt, node);
9967                 ctxt->state = nstate;
9968                 ctxt->states = NULL;
9969 
9970                 tmp = xmlRelaxNGValidateCompiledContent(ctxt,
9971                                                         define->contModel,
9972                                                         ctxt->state->seq);
9973                 nseq = ctxt->state->seq;
9974                 ctxt->state = tmpstate;
9975                 ctxt->states = tmpstates;
9976                 xmlRelaxNGFreeValidState(ctxt, nstate);
9977 
9978 #ifdef DEBUG_COMPILE
9979                 xmlGenericError(xmlGenericErrorContext,
9980                                 "Validating content of '%s' : %d\n",
9981                                 define->name, tmp);
9982 #endif
9983                 if (tmp != 0)
9984                     ret = -1;
9985 
9986                 if (ctxt->states != NULL) {
9987                     tmp = -1;
9988 
9989                     for (i = 0; i < ctxt->states->nbState; i++) {
9990                         state = ctxt->states->tabState[i];
9991                         ctxt->state = state;
9992                         ctxt->state->seq = nseq;
9993 
9994                         if (xmlRelaxNGValidateElementEnd(ctxt, 0) == 0) {
9995                             tmp = 0;
9996                             break;
9997                         }
9998                     }
9999                     if (tmp != 0) {
10000                         /*
10001                          * validation error, log the message for the "best" one
10002                          */
10003                         ctxt->flags |= FLAGS_IGNORABLE;
10004                         xmlRelaxNGLogBestError(ctxt);
10005                     }
10006                     for (i = 0; i < ctxt->states->nbState; i++) {
10007                         xmlRelaxNGFreeValidState(ctxt,
10008                                                  ctxt->states->
10009                                                  tabState[i]);
10010                     }
10011                     xmlRelaxNGFreeStates(ctxt, ctxt->states);
10012                     ctxt->flags = oldflags;
10013                     ctxt->states = NULL;
10014                     if ((ret == 0) && (tmp == -1))
10015                         ret = -1;
10016                 } else {
10017                     state = ctxt->state;
10018 		    if (ctxt->state != NULL)
10019 			ctxt->state->seq = nseq;
10020                     if (ret == 0)
10021                         ret = xmlRelaxNGValidateElementEnd(ctxt, 1);
10022                     xmlRelaxNGFreeValidState(ctxt, state);
10023                 }
10024             } else {
10025                 if (define->content != NULL) {
10026                     tmp = xmlRelaxNGValidateDefinitionList(ctxt,
10027                                                            define->
10028                                                            content);
10029                     if (tmp != 0) {
10030                         ret = -1;
10031                         if (ctxt->state == NULL) {
10032                             ctxt->state = oldstate;
10033                             VALID_ERR2(XML_RELAXNG_ERR_CONTENTVALID,
10034                                        node->name);
10035                             ctxt->state = NULL;
10036                         } else {
10037                             VALID_ERR2(XML_RELAXNG_ERR_CONTENTVALID,
10038                                        node->name);
10039                         }
10040 
10041                     }
10042                 }
10043                 if (ctxt->states != NULL) {
10044                     tmp = -1;
10045 
10046                     for (i = 0; i < ctxt->states->nbState; i++) {
10047                         state = ctxt->states->tabState[i];
10048                         ctxt->state = state;
10049 
10050                         if (xmlRelaxNGValidateElementEnd(ctxt, 0) == 0) {
10051                             tmp = 0;
10052                             break;
10053                         }
10054                     }
10055                     if (tmp != 0) {
10056                         /*
10057                          * validation error, log the message for the "best" one
10058                          */
10059                         ctxt->flags |= FLAGS_IGNORABLE;
10060                         xmlRelaxNGLogBestError(ctxt);
10061                     }
10062                     for (i = 0; i < ctxt->states->nbState; i++) {
10063                         xmlRelaxNGFreeValidState(ctxt,
10064                                                  ctxt->states->tabState[i]);
10065                         ctxt->states->tabState[i] = NULL;
10066                     }
10067                     xmlRelaxNGFreeStates(ctxt, ctxt->states);
10068                     ctxt->flags = oldflags;
10069                     ctxt->states = NULL;
10070                     if ((ret == 0) && (tmp == -1))
10071                         ret = -1;
10072                 } else {
10073                     state = ctxt->state;
10074                     if (ret == 0)
10075                         ret = xmlRelaxNGValidateElementEnd(ctxt, 1);
10076                     xmlRelaxNGFreeValidState(ctxt, state);
10077                 }
10078             }
10079             if (ret == 0) {
10080                 node->psvi = define;
10081             }
10082             ctxt->flags = oldflags;
10083             ctxt->state = oldstate;
10084             if (oldstate != NULL)
10085                 oldstate->seq = xmlRelaxNGSkipIgnored(ctxt, node->next);
10086             if (ret != 0) {
10087                 if ((ctxt->flags & FLAGS_IGNORABLE) == 0) {
10088                     xmlRelaxNGDumpValidError(ctxt);
10089                     ret = 0;
10090 #if 0
10091                 } else {
10092                     ret = -2;
10093 #endif
10094                 }
10095             } else {
10096                 if (ctxt->errNr > errNr)
10097                     xmlRelaxNGPopErrors(ctxt, errNr);
10098             }
10099 
10100 #ifdef DEBUG
10101             xmlGenericError(xmlGenericErrorContext,
10102                             "xmlRelaxNGValidateDefinition(): validated %s : %d",
10103                             node->name, ret);
10104             if (oldstate == NULL)
10105                 xmlGenericError(xmlGenericErrorContext, ": no state\n");
10106             else if (oldstate->seq == NULL)
10107                 xmlGenericError(xmlGenericErrorContext, ": done\n");
10108             else if (oldstate->seq->type == XML_ELEMENT_NODE)
10109                 xmlGenericError(xmlGenericErrorContext, ": next elem %s\n",
10110                                 oldstate->seq->name);
10111             else
10112                 xmlGenericError(xmlGenericErrorContext, ": next %s %d\n",
10113                                 oldstate->seq->name, oldstate->seq->type);
10114 #endif
10115             break;
10116         case XML_RELAXNG_OPTIONAL:{
10117                 errNr = ctxt->errNr;
10118                 oldflags = ctxt->flags;
10119                 ctxt->flags |= FLAGS_IGNORABLE;
10120                 oldstate = xmlRelaxNGCopyValidState(ctxt, ctxt->state);
10121                 ret =
10122                     xmlRelaxNGValidateDefinitionList(ctxt,
10123                                                      define->content);
10124                 if (ret != 0) {
10125                     if (ctxt->state != NULL)
10126                         xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10127                     ctxt->state = oldstate;
10128                     ctxt->flags = oldflags;
10129                     ret = 0;
10130                     if (ctxt->errNr > errNr)
10131                         xmlRelaxNGPopErrors(ctxt, errNr);
10132                     break;
10133                 }
10134                 if (ctxt->states != NULL) {
10135                     xmlRelaxNGAddStates(ctxt, ctxt->states, oldstate);
10136                 } else {
10137                     ctxt->states = xmlRelaxNGNewStates(ctxt, 1);
10138                     if (ctxt->states == NULL) {
10139                         xmlRelaxNGFreeValidState(ctxt, oldstate);
10140                         ctxt->flags = oldflags;
10141                         ret = -1;
10142                         if (ctxt->errNr > errNr)
10143                             xmlRelaxNGPopErrors(ctxt, errNr);
10144                         break;
10145                     }
10146                     xmlRelaxNGAddStates(ctxt, ctxt->states, oldstate);
10147                     xmlRelaxNGAddStates(ctxt, ctxt->states, ctxt->state);
10148                     ctxt->state = NULL;
10149                 }
10150                 ctxt->flags = oldflags;
10151                 ret = 0;
10152                 if (ctxt->errNr > errNr)
10153                     xmlRelaxNGPopErrors(ctxt, errNr);
10154                 break;
10155             }
10156         case XML_RELAXNG_ONEORMORE:
10157             errNr = ctxt->errNr;
10158             ret = xmlRelaxNGValidateDefinitionList(ctxt, define->content);
10159             if (ret != 0) {
10160                 break;
10161             }
10162             if (ctxt->errNr > errNr)
10163                 xmlRelaxNGPopErrors(ctxt, errNr);
10164             /* no break on purpose */
10165         case XML_RELAXNG_ZEROORMORE:{
10166                 int progress;
10167                 xmlRelaxNGStatesPtr states = NULL, res = NULL;
10168                 int base, j;
10169 
10170                 errNr = ctxt->errNr;
10171                 res = xmlRelaxNGNewStates(ctxt, 1);
10172                 if (res == NULL) {
10173                     ret = -1;
10174                     break;
10175                 }
10176                 /*
10177                  * All the input states are also exit states
10178                  */
10179                 if (ctxt->state != NULL) {
10180                     xmlRelaxNGAddStates(ctxt, res,
10181                                         xmlRelaxNGCopyValidState(ctxt,
10182                                                                  ctxt->
10183                                                                  state));
10184                 } else {
10185                     for (j = 0; j < ctxt->states->nbState; j++) {
10186                         xmlRelaxNGAddStates(ctxt, res,
10187                             xmlRelaxNGCopyValidState(ctxt,
10188                                             ctxt->states->tabState[j]));
10189                     }
10190                 }
10191                 oldflags = ctxt->flags;
10192                 ctxt->flags |= FLAGS_IGNORABLE;
10193                 do {
10194                     progress = 0;
10195                     base = res->nbState;
10196 
10197                     if (ctxt->states != NULL) {
10198                         states = ctxt->states;
10199                         for (i = 0; i < states->nbState; i++) {
10200                             ctxt->state = states->tabState[i];
10201                             ctxt->states = NULL;
10202                             ret = xmlRelaxNGValidateDefinitionList(ctxt,
10203                                                                    define->
10204                                                                    content);
10205                             if (ret == 0) {
10206                                 if (ctxt->state != NULL) {
10207                                     tmp = xmlRelaxNGAddStates(ctxt, res,
10208                                                               ctxt->state);
10209                                     ctxt->state = NULL;
10210                                     if (tmp == 1)
10211                                         progress = 1;
10212                                 } else if (ctxt->states != NULL) {
10213                                     for (j = 0; j < ctxt->states->nbState;
10214                                          j++) {
10215                                         tmp =
10216                                             xmlRelaxNGAddStates(ctxt, res,
10217                                                    ctxt->states->tabState[j]);
10218                                         if (tmp == 1)
10219                                             progress = 1;
10220                                     }
10221                                     xmlRelaxNGFreeStates(ctxt,
10222                                                          ctxt->states);
10223                                     ctxt->states = NULL;
10224                                 }
10225                             } else {
10226                                 if (ctxt->state != NULL) {
10227                                     xmlRelaxNGFreeValidState(ctxt,
10228                                                              ctxt->state);
10229                                     ctxt->state = NULL;
10230                                 }
10231                             }
10232                         }
10233                     } else {
10234                         ret = xmlRelaxNGValidateDefinitionList(ctxt,
10235                                                                define->
10236                                                                content);
10237                         if (ret != 0) {
10238                             xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10239                             ctxt->state = NULL;
10240                         } else {
10241                             base = res->nbState;
10242                             if (ctxt->state != NULL) {
10243                                 tmp = xmlRelaxNGAddStates(ctxt, res,
10244                                                           ctxt->state);
10245                                 ctxt->state = NULL;
10246                                 if (tmp == 1)
10247                                     progress = 1;
10248                             } else if (ctxt->states != NULL) {
10249                                 for (j = 0; j < ctxt->states->nbState; j++) {
10250                                     tmp = xmlRelaxNGAddStates(ctxt, res,
10251                                                ctxt->states->tabState[j]);
10252                                     if (tmp == 1)
10253                                         progress = 1;
10254                                 }
10255                                 if (states == NULL) {
10256                                     states = ctxt->states;
10257                                 } else {
10258                                     xmlRelaxNGFreeStates(ctxt,
10259                                                          ctxt->states);
10260                                 }
10261                                 ctxt->states = NULL;
10262                             }
10263                         }
10264                     }
10265                     if (progress) {
10266                         /*
10267                          * Collect all the new nodes added at that step
10268                          * and make them the new node set
10269                          */
10270                         if (res->nbState - base == 1) {
10271                             ctxt->state = xmlRelaxNGCopyValidState(ctxt,
10272                                                                    res->
10273                                                                    tabState
10274                                                                    [base]);
10275                         } else {
10276                             if (states == NULL) {
10277                                 xmlRelaxNGNewStates(ctxt,
10278                                                     res->nbState - base);
10279 			        states = ctxt->states;
10280 				if (states == NULL) {
10281 				    progress = 0;
10282 				    break;
10283 				}
10284                             }
10285                             states->nbState = 0;
10286                             for (i = base; i < res->nbState; i++)
10287                                 xmlRelaxNGAddStates(ctxt, states,
10288                                                     xmlRelaxNGCopyValidState
10289                                                     (ctxt, res->tabState[i]));
10290                             ctxt->states = states;
10291                         }
10292                     }
10293                 } while (progress == 1);
10294                 if (states != NULL) {
10295                     xmlRelaxNGFreeStates(ctxt, states);
10296                 }
10297                 ctxt->states = res;
10298                 ctxt->flags = oldflags;
10299 #if 0
10300                 /*
10301                  * errors may have to be propagated back...
10302                  */
10303                 if (ctxt->errNr > errNr)
10304                     xmlRelaxNGPopErrors(ctxt, errNr);
10305 #endif
10306                 ret = 0;
10307                 break;
10308             }
10309         case XML_RELAXNG_CHOICE:{
10310                 xmlRelaxNGDefinePtr list = NULL;
10311                 xmlRelaxNGStatesPtr states = NULL;
10312 
10313                 node = xmlRelaxNGSkipIgnored(ctxt, node);
10314 
10315                 errNr = ctxt->errNr;
10316                 if ((define->dflags & IS_TRIABLE) && (define->data != NULL) &&
10317 		    (node != NULL)) {
10318 		    /*
10319 		     * node == NULL can't be optimized since IS_TRIABLE
10320 		     * doesn't account for choice which may lead to
10321 		     * only attributes.
10322 		     */
10323                     xmlHashTablePtr triage =
10324                         (xmlHashTablePtr) define->data;
10325 
10326                     /*
10327                      * Something we can optimize cleanly there is only one
10328                      * possble branch out !
10329                      */
10330                     if ((node->type == XML_TEXT_NODE) ||
10331                         (node->type == XML_CDATA_SECTION_NODE)) {
10332                         list =
10333                             xmlHashLookup2(triage, BAD_CAST "#text", NULL);
10334                     } else if (node->type == XML_ELEMENT_NODE) {
10335                         if (node->ns != NULL) {
10336                             list = xmlHashLookup2(triage, node->name,
10337                                                   node->ns->href);
10338                             if (list == NULL)
10339                                 list =
10340                                     xmlHashLookup2(triage, BAD_CAST "#any",
10341                                                    node->ns->href);
10342                         } else
10343                             list =
10344                                 xmlHashLookup2(triage, node->name, NULL);
10345                         if (list == NULL)
10346                             list =
10347                                 xmlHashLookup2(triage, BAD_CAST "#any",
10348                                                NULL);
10349                     }
10350                     if (list == NULL) {
10351                         ret = -1;
10352 			VALID_ERR2(XML_RELAXNG_ERR_ELEMWRONG, node->name);
10353                         break;
10354                     }
10355                     ret = xmlRelaxNGValidateDefinition(ctxt, list);
10356                     if (ret == 0) {
10357                     }
10358                     break;
10359                 }
10360 
10361                 list = define->content;
10362                 oldflags = ctxt->flags;
10363                 ctxt->flags |= FLAGS_IGNORABLE;
10364 
10365                 while (list != NULL) {
10366                     oldstate = xmlRelaxNGCopyValidState(ctxt, ctxt->state);
10367                     ret = xmlRelaxNGValidateDefinition(ctxt, list);
10368                     if (ret == 0) {
10369                         if (states == NULL) {
10370                             states = xmlRelaxNGNewStates(ctxt, 1);
10371                         }
10372                         if (ctxt->state != NULL) {
10373                             xmlRelaxNGAddStates(ctxt, states, ctxt->state);
10374                         } else if (ctxt->states != NULL) {
10375                             for (i = 0; i < ctxt->states->nbState; i++) {
10376                                 xmlRelaxNGAddStates(ctxt, states,
10377                                                     ctxt->states->
10378                                                     tabState[i]);
10379                             }
10380                             xmlRelaxNGFreeStates(ctxt, ctxt->states);
10381                             ctxt->states = NULL;
10382                         }
10383                     } else {
10384                         xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10385                     }
10386                     ctxt->state = oldstate;
10387                     list = list->next;
10388                 }
10389                 if (states != NULL) {
10390                     xmlRelaxNGFreeValidState(ctxt, oldstate);
10391                     ctxt->states = states;
10392                     ctxt->state = NULL;
10393                     ret = 0;
10394                 } else {
10395                     ctxt->states = NULL;
10396                 }
10397                 ctxt->flags = oldflags;
10398                 if (ret != 0) {
10399                     if ((ctxt->flags & FLAGS_IGNORABLE) == 0) {
10400                         xmlRelaxNGDumpValidError(ctxt);
10401                     }
10402                 } else {
10403                     if (ctxt->errNr > errNr)
10404                         xmlRelaxNGPopErrors(ctxt, errNr);
10405                 }
10406                 break;
10407             }
10408         case XML_RELAXNG_DEF:
10409         case XML_RELAXNG_GROUP:
10410             ret = xmlRelaxNGValidateDefinitionList(ctxt, define->content);
10411             break;
10412         case XML_RELAXNG_INTERLEAVE:
10413             ret = xmlRelaxNGValidateInterleave(ctxt, define);
10414             break;
10415         case XML_RELAXNG_ATTRIBUTE:
10416             ret = xmlRelaxNGValidateAttribute(ctxt, define);
10417             break;
10418         case XML_RELAXNG_START:
10419         case XML_RELAXNG_NOOP:
10420         case XML_RELAXNG_REF:
10421         case XML_RELAXNG_EXTERNALREF:
10422         case XML_RELAXNG_PARENTREF:
10423             ret = xmlRelaxNGValidateDefinition(ctxt, define->content);
10424             break;
10425         case XML_RELAXNG_DATATYPE:{
10426                 xmlNodePtr child;
10427                 xmlChar *content = NULL;
10428 
10429                 child = node;
10430                 while (child != NULL) {
10431                     if (child->type == XML_ELEMENT_NODE) {
10432                         VALID_ERR2(XML_RELAXNG_ERR_DATAELEM,
10433                                    node->parent->name);
10434                         ret = -1;
10435                         break;
10436                     } else if ((child->type == XML_TEXT_NODE) ||
10437                                (child->type == XML_CDATA_SECTION_NODE)) {
10438                         content = xmlStrcat(content, child->content);
10439                     }
10440                     /* TODO: handle entities ... */
10441                     child = child->next;
10442                 }
10443                 if (ret == -1) {
10444                     if (content != NULL)
10445                         xmlFree(content);
10446                     break;
10447                 }
10448                 if (content == NULL) {
10449                     content = xmlStrdup(BAD_CAST "");
10450                     if (content == NULL) {
10451                         xmlRngVErrMemory(ctxt, "validating\n");
10452                         ret = -1;
10453                         break;
10454                     }
10455                 }
10456                 ret = xmlRelaxNGValidateDatatype(ctxt, content, define,
10457                                                  ctxt->state->seq);
10458                 if (ret == -1) {
10459                     VALID_ERR2(XML_RELAXNG_ERR_DATATYPE, define->name);
10460                 } else if (ret == 0) {
10461                     ctxt->state->seq = NULL;
10462                 }
10463                 if (content != NULL)
10464                     xmlFree(content);
10465                 break;
10466             }
10467         case XML_RELAXNG_VALUE:{
10468                 xmlChar *content = NULL;
10469                 xmlChar *oldvalue;
10470                 xmlNodePtr child;
10471 
10472                 child = node;
10473                 while (child != NULL) {
10474                     if (child->type == XML_ELEMENT_NODE) {
10475                         VALID_ERR2(XML_RELAXNG_ERR_VALELEM,
10476                                    node->parent->name);
10477                         ret = -1;
10478                         break;
10479                     } else if ((child->type == XML_TEXT_NODE) ||
10480                                (child->type == XML_CDATA_SECTION_NODE)) {
10481                         content = xmlStrcat(content, child->content);
10482                     }
10483                     /* TODO: handle entities ... */
10484                     child = child->next;
10485                 }
10486                 if (ret == -1) {
10487                     if (content != NULL)
10488                         xmlFree(content);
10489                     break;
10490                 }
10491                 if (content == NULL) {
10492                     content = xmlStrdup(BAD_CAST "");
10493                     if (content == NULL) {
10494                         xmlRngVErrMemory(ctxt, "validating\n");
10495                         ret = -1;
10496                         break;
10497                     }
10498                 }
10499                 oldvalue = ctxt->state->value;
10500                 ctxt->state->value = content;
10501                 ret = xmlRelaxNGValidateValue(ctxt, define);
10502                 ctxt->state->value = oldvalue;
10503                 if (ret == -1) {
10504                     VALID_ERR2(XML_RELAXNG_ERR_VALUE, define->name);
10505                 } else if (ret == 0) {
10506                     ctxt->state->seq = NULL;
10507                 }
10508                 if (content != NULL)
10509                     xmlFree(content);
10510                 break;
10511             }
10512         case XML_RELAXNG_LIST:{
10513                 xmlChar *content;
10514                 xmlNodePtr child;
10515                 xmlChar *oldvalue, *oldendvalue;
10516                 int len;
10517 
10518                 /*
10519                  * Make sure it's only text nodes
10520                  */
10521 
10522                 content = NULL;
10523                 child = node;
10524                 while (child != NULL) {
10525                     if (child->type == XML_ELEMENT_NODE) {
10526                         VALID_ERR2(XML_RELAXNG_ERR_LISTELEM,
10527                                    node->parent->name);
10528                         ret = -1;
10529                         break;
10530                     } else if ((child->type == XML_TEXT_NODE) ||
10531                                (child->type == XML_CDATA_SECTION_NODE)) {
10532                         content = xmlStrcat(content, child->content);
10533                     }
10534                     /* TODO: handle entities ... */
10535                     child = child->next;
10536                 }
10537                 if (ret == -1) {
10538                     if (content != NULL)
10539                         xmlFree(content);
10540                     break;
10541                 }
10542                 if (content == NULL) {
10543                     content = xmlStrdup(BAD_CAST "");
10544                     if (content == NULL) {
10545                         xmlRngVErrMemory(ctxt, "validating\n");
10546                         ret = -1;
10547                         break;
10548                     }
10549                 }
10550                 len = xmlStrlen(content);
10551                 oldvalue = ctxt->state->value;
10552                 oldendvalue = ctxt->state->endvalue;
10553                 ctxt->state->value = content;
10554                 ctxt->state->endvalue = content + len;
10555                 ret = xmlRelaxNGValidateValue(ctxt, define);
10556                 ctxt->state->value = oldvalue;
10557                 ctxt->state->endvalue = oldendvalue;
10558                 if (ret == -1) {
10559                     VALID_ERR(XML_RELAXNG_ERR_LIST);
10560                 } else if ((ret == 0) && (node != NULL)) {
10561                     ctxt->state->seq = node->next;
10562                 }
10563                 if (content != NULL)
10564                     xmlFree(content);
10565                 break;
10566             }
10567         case XML_RELAXNG_EXCEPT:
10568         case XML_RELAXNG_PARAM:
10569             TODO ret = -1;
10570             break;
10571     }
10572     ctxt->depth--;
10573 #ifdef DEBUG
10574     for (i = 0; i < ctxt->depth; i++)
10575         xmlGenericError(xmlGenericErrorContext, " ");
10576     xmlGenericError(xmlGenericErrorContext,
10577                     "Validating %s ", xmlRelaxNGDefName(define));
10578     if (define->name != NULL)
10579         xmlGenericError(xmlGenericErrorContext, "%s ", define->name);
10580     if (ret == 0)
10581         xmlGenericError(xmlGenericErrorContext, "suceeded\n");
10582     else
10583         xmlGenericError(xmlGenericErrorContext, "failed\n");
10584 #endif
10585     return (ret);
10586 }
10587 
10588 /**
10589  * xmlRelaxNGValidateDefinition:
10590  * @ctxt:  a Relax-NG validation context
10591  * @define:  the definition to verify
10592  *
10593  * Validate the current node lists against the definition
10594  *
10595  * Returns 0 if the validation succeeded or an error code.
10596  */
10597 static int
xmlRelaxNGValidateDefinition(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGDefinePtr define)10598 xmlRelaxNGValidateDefinition(xmlRelaxNGValidCtxtPtr ctxt,
10599                              xmlRelaxNGDefinePtr define)
10600 {
10601     xmlRelaxNGStatesPtr states, res;
10602     int i, j, k, ret, oldflags;
10603 
10604     /*
10605      * We should NOT have both ctxt->state and ctxt->states
10606      */
10607     if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
10608         TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10609         ctxt->state = NULL;
10610     }
10611 
10612     if ((ctxt->states == NULL) || (ctxt->states->nbState == 1)) {
10613         if (ctxt->states != NULL) {
10614             ctxt->state = ctxt->states->tabState[0];
10615             xmlRelaxNGFreeStates(ctxt, ctxt->states);
10616             ctxt->states = NULL;
10617         }
10618         ret = xmlRelaxNGValidateState(ctxt, define);
10619         if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
10620             TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10621             ctxt->state = NULL;
10622         }
10623         if ((ctxt->states != NULL) && (ctxt->states->nbState == 1)) {
10624             ctxt->state = ctxt->states->tabState[0];
10625             xmlRelaxNGFreeStates(ctxt, ctxt->states);
10626             ctxt->states = NULL;
10627         }
10628         return (ret);
10629     }
10630 
10631     states = ctxt->states;
10632     ctxt->states = NULL;
10633     res = NULL;
10634     j = 0;
10635     oldflags = ctxt->flags;
10636     ctxt->flags |= FLAGS_IGNORABLE;
10637     for (i = 0; i < states->nbState; i++) {
10638         ctxt->state = states->tabState[i];
10639         ctxt->states = NULL;
10640         ret = xmlRelaxNGValidateState(ctxt, define);
10641         /*
10642          * We should NOT have both ctxt->state and ctxt->states
10643          */
10644         if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
10645             TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10646             ctxt->state = NULL;
10647         }
10648         if (ret == 0) {
10649             if (ctxt->states == NULL) {
10650                 if (res != NULL) {
10651                     /* add the state to the container */
10652                     xmlRelaxNGAddStates(ctxt, res, ctxt->state);
10653                     ctxt->state = NULL;
10654                 } else {
10655                     /* add the state directly in states */
10656                     states->tabState[j++] = ctxt->state;
10657                     ctxt->state = NULL;
10658                 }
10659             } else {
10660                 if (res == NULL) {
10661                     /* make it the new container and copy other results */
10662                     res = ctxt->states;
10663                     ctxt->states = NULL;
10664                     for (k = 0; k < j; k++)
10665                         xmlRelaxNGAddStates(ctxt, res,
10666                                             states->tabState[k]);
10667                 } else {
10668                     /* add all the new results to res and reff the container */
10669                     for (k = 0; k < ctxt->states->nbState; k++)
10670                         xmlRelaxNGAddStates(ctxt, res,
10671                                             ctxt->states->tabState[k]);
10672                     xmlRelaxNGFreeStates(ctxt, ctxt->states);
10673                     ctxt->states = NULL;
10674                 }
10675             }
10676         } else {
10677             if (ctxt->state != NULL) {
10678                 xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10679                 ctxt->state = NULL;
10680             } else if (ctxt->states != NULL) {
10681                 for (k = 0; k < ctxt->states->nbState; k++)
10682                     xmlRelaxNGFreeValidState(ctxt,
10683                                              ctxt->states->tabState[k]);
10684                 xmlRelaxNGFreeStates(ctxt, ctxt->states);
10685                 ctxt->states = NULL;
10686             }
10687         }
10688     }
10689     ctxt->flags = oldflags;
10690     if (res != NULL) {
10691         xmlRelaxNGFreeStates(ctxt, states);
10692         ctxt->states = res;
10693         ret = 0;
10694     } else if (j > 1) {
10695         states->nbState = j;
10696         ctxt->states = states;
10697         ret = 0;
10698     } else if (j == 1) {
10699         ctxt->state = states->tabState[0];
10700         xmlRelaxNGFreeStates(ctxt, states);
10701         ret = 0;
10702     } else {
10703         ret = -1;
10704         xmlRelaxNGFreeStates(ctxt, states);
10705         if (ctxt->states != NULL) {
10706             xmlRelaxNGFreeStates(ctxt, ctxt->states);
10707             ctxt->states = NULL;
10708         }
10709     }
10710     if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
10711         TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10712         ctxt->state = NULL;
10713     }
10714     return (ret);
10715 }
10716 
10717 /**
10718  * xmlRelaxNGValidateDocument:
10719  * @ctxt:  a Relax-NG validation context
10720  * @doc:  the document
10721  *
10722  * Validate the given document
10723  *
10724  * Returns 0 if the validation succeeded or an error code.
10725  */
10726 static int
xmlRelaxNGValidateDocument(xmlRelaxNGValidCtxtPtr ctxt,xmlDocPtr doc)10727 xmlRelaxNGValidateDocument(xmlRelaxNGValidCtxtPtr ctxt, xmlDocPtr doc)
10728 {
10729     int ret;
10730     xmlRelaxNGPtr schema;
10731     xmlRelaxNGGrammarPtr grammar;
10732     xmlRelaxNGValidStatePtr state;
10733     xmlNodePtr node;
10734 
10735     if ((ctxt == NULL) || (ctxt->schema == NULL) || (doc == NULL))
10736         return (-1);
10737 
10738     ctxt->errNo = XML_RELAXNG_OK;
10739     schema = ctxt->schema;
10740     grammar = schema->topgrammar;
10741     if (grammar == NULL) {
10742         VALID_ERR(XML_RELAXNG_ERR_NOGRAMMAR);
10743         return (-1);
10744     }
10745     state = xmlRelaxNGNewValidState(ctxt, NULL);
10746     ctxt->state = state;
10747     ret = xmlRelaxNGValidateDefinition(ctxt, grammar->start);
10748     if ((ctxt->state != NULL) && (state->seq != NULL)) {
10749         state = ctxt->state;
10750         node = state->seq;
10751         node = xmlRelaxNGSkipIgnored(ctxt, node);
10752         if (node != NULL) {
10753             if (ret != -1) {
10754                 VALID_ERR(XML_RELAXNG_ERR_EXTRADATA);
10755                 ret = -1;
10756             }
10757         }
10758     } else if (ctxt->states != NULL) {
10759         int i;
10760         int tmp = -1;
10761 
10762         for (i = 0; i < ctxt->states->nbState; i++) {
10763             state = ctxt->states->tabState[i];
10764             node = state->seq;
10765             node = xmlRelaxNGSkipIgnored(ctxt, node);
10766             if (node == NULL)
10767                 tmp = 0;
10768             xmlRelaxNGFreeValidState(ctxt, state);
10769         }
10770         if (tmp == -1) {
10771             if (ret != -1) {
10772                 VALID_ERR(XML_RELAXNG_ERR_EXTRADATA);
10773                 ret = -1;
10774             }
10775         }
10776     }
10777     if (ctxt->state != NULL) {
10778         xmlRelaxNGFreeValidState(ctxt, ctxt->state);
10779         ctxt->state = NULL;
10780     }
10781     if (ret != 0)
10782         xmlRelaxNGDumpValidError(ctxt);
10783 #ifdef DEBUG
10784     else if (ctxt->errNr != 0) {
10785         ctxt->error(ctxt->userData,
10786                     "%d Extra error messages left on stack !\n",
10787                     ctxt->errNr);
10788         xmlRelaxNGDumpValidError(ctxt);
10789     }
10790 #endif
10791 #ifdef LIBXML_VALID_ENABLED
10792     if (ctxt->idref == 1) {
10793         xmlValidCtxt vctxt;
10794 
10795         memset(&vctxt, 0, sizeof(xmlValidCtxt));
10796         vctxt.valid = 1;
10797         vctxt.error = ctxt->error;
10798         vctxt.warning = ctxt->warning;
10799         vctxt.userData = ctxt->userData;
10800 
10801         if (xmlValidateDocumentFinal(&vctxt, doc) != 1)
10802             ret = -1;
10803     }
10804 #endif /* LIBXML_VALID_ENABLED */
10805     if ((ret == 0) && (ctxt->errNo != XML_RELAXNG_OK))
10806         ret = -1;
10807 
10808     return (ret);
10809 }
10810 
10811 /**
10812  * xmlRelaxNGCleanPSVI:
10813  * @node:  an input element or document
10814  *
10815  * Call this routine to speed up XPath computation on static documents.
10816  * This stamps all the element nodes with the document order
10817  * Like for line information, the order is kept in the element->content
10818  * field, the value stored is actually - the node number (starting at -1)
10819  * to be able to differentiate from line numbers.
10820  *
10821  * Returns the number of elements found in the document or -1 in case
10822  *    of error.
10823  */
10824 static void
xmlRelaxNGCleanPSVI(xmlNodePtr node)10825 xmlRelaxNGCleanPSVI(xmlNodePtr node) {
10826     xmlNodePtr cur;
10827 
10828     if ((node == NULL) ||
10829         ((node->type != XML_ELEMENT_NODE) &&
10830          (node->type != XML_DOCUMENT_NODE) &&
10831          (node->type != XML_HTML_DOCUMENT_NODE)))
10832 	return;
10833     if (node->type == XML_ELEMENT_NODE)
10834         node->psvi = NULL;
10835 
10836     cur = node->children;
10837     while (cur != NULL) {
10838 	if (cur->type == XML_ELEMENT_NODE) {
10839 	    cur->psvi = NULL;
10840 	    if (cur->children != NULL) {
10841 		cur = cur->children;
10842 		continue;
10843 	    }
10844 	}
10845 	if (cur->next != NULL) {
10846 	    cur = cur->next;
10847 	    continue;
10848 	}
10849 	do {
10850 	    cur = cur->parent;
10851 	    if (cur == NULL)
10852 		break;
10853 	    if (cur == node) {
10854 		cur = NULL;
10855 		break;
10856 	    }
10857 	    if (cur->next != NULL) {
10858 		cur = cur->next;
10859 		break;
10860 	    }
10861 	} while (cur != NULL);
10862     }
10863     return;
10864 }
10865 /************************************************************************
10866  *									*
10867  *			Validation interfaces				*
10868  *									*
10869  ************************************************************************/
10870 
10871 /**
10872  * xmlRelaxNGNewValidCtxt:
10873  * @schema:  a precompiled XML RelaxNGs
10874  *
10875  * Create an XML RelaxNGs validation context based on the given schema
10876  *
10877  * Returns the validation context or NULL in case of error
10878  */
10879 xmlRelaxNGValidCtxtPtr
xmlRelaxNGNewValidCtxt(xmlRelaxNGPtr schema)10880 xmlRelaxNGNewValidCtxt(xmlRelaxNGPtr schema)
10881 {
10882     xmlRelaxNGValidCtxtPtr ret;
10883 
10884     ret = (xmlRelaxNGValidCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGValidCtxt));
10885     if (ret == NULL) {
10886         xmlRngVErrMemory(NULL, "building context\n");
10887         return (NULL);
10888     }
10889     memset(ret, 0, sizeof(xmlRelaxNGValidCtxt));
10890     ret->schema = schema;
10891     ret->error = xmlGenericError;
10892     ret->userData = xmlGenericErrorContext;
10893     ret->errNr = 0;
10894     ret->errMax = 0;
10895     ret->err = NULL;
10896     ret->errTab = NULL;
10897     if (schema != NULL)
10898 	ret->idref = schema->idref;
10899     ret->states = NULL;
10900     ret->freeState = NULL;
10901     ret->freeStates = NULL;
10902     ret->errNo = XML_RELAXNG_OK;
10903     return (ret);
10904 }
10905 
10906 /**
10907  * xmlRelaxNGFreeValidCtxt:
10908  * @ctxt:  the schema validation context
10909  *
10910  * Free the resources associated to the schema validation context
10911  */
10912 void
xmlRelaxNGFreeValidCtxt(xmlRelaxNGValidCtxtPtr ctxt)10913 xmlRelaxNGFreeValidCtxt(xmlRelaxNGValidCtxtPtr ctxt)
10914 {
10915     int k;
10916 
10917     if (ctxt == NULL)
10918         return;
10919     if (ctxt->states != NULL)
10920         xmlRelaxNGFreeStates(NULL, ctxt->states);
10921     if (ctxt->freeState != NULL) {
10922         for (k = 0; k < ctxt->freeState->nbState; k++) {
10923             xmlRelaxNGFreeValidState(NULL, ctxt->freeState->tabState[k]);
10924         }
10925         xmlRelaxNGFreeStates(NULL, ctxt->freeState);
10926     }
10927     if (ctxt->freeStates != NULL) {
10928         for (k = 0; k < ctxt->freeStatesNr; k++) {
10929             xmlRelaxNGFreeStates(NULL, ctxt->freeStates[k]);
10930         }
10931         xmlFree(ctxt->freeStates);
10932     }
10933     if (ctxt->errTab != NULL)
10934         xmlFree(ctxt->errTab);
10935     if (ctxt->elemTab != NULL) {
10936         xmlRegExecCtxtPtr exec;
10937 
10938         exec = xmlRelaxNGElemPop(ctxt);
10939         while (exec != NULL) {
10940             xmlRegFreeExecCtxt(exec);
10941             exec = xmlRelaxNGElemPop(ctxt);
10942         }
10943         xmlFree(ctxt->elemTab);
10944     }
10945     xmlFree(ctxt);
10946 }
10947 
10948 /**
10949  * xmlRelaxNGSetValidErrors:
10950  * @ctxt:  a Relax-NG validation context
10951  * @err:  the error function
10952  * @warn: the warning function
10953  * @ctx: the functions context
10954  *
10955  * Set the error and warning callback informations
10956  */
10957 void
xmlRelaxNGSetValidErrors(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidityErrorFunc err,xmlRelaxNGValidityWarningFunc warn,void * ctx)10958 xmlRelaxNGSetValidErrors(xmlRelaxNGValidCtxtPtr ctxt,
10959                          xmlRelaxNGValidityErrorFunc err,
10960                          xmlRelaxNGValidityWarningFunc warn, void *ctx)
10961 {
10962     if (ctxt == NULL)
10963         return;
10964     ctxt->error = err;
10965     ctxt->warning = warn;
10966     ctxt->userData = ctx;
10967     ctxt->serror = NULL;
10968 }
10969 
10970 /**
10971  * xmlRelaxNGSetValidStructuredErrors:
10972  * @ctxt:  a Relax-NG validation context
10973  * @serror:  the structured error function
10974  * @ctx: the functions context
10975  *
10976  * Set the structured error callback
10977  */
10978 void
xmlRelaxNGSetValidStructuredErrors(xmlRelaxNGValidCtxtPtr ctxt,xmlStructuredErrorFunc serror,void * ctx)10979 xmlRelaxNGSetValidStructuredErrors(xmlRelaxNGValidCtxtPtr ctxt,
10980                                    xmlStructuredErrorFunc serror, void *ctx)
10981 {
10982     if (ctxt == NULL)
10983         return;
10984     ctxt->serror = serror;
10985     ctxt->error = NULL;
10986     ctxt->warning = NULL;
10987     ctxt->userData = ctx;
10988 }
10989 
10990 /**
10991  * xmlRelaxNGGetValidErrors:
10992  * @ctxt:  a Relax-NG validation context
10993  * @err:  the error function result
10994  * @warn: the warning function result
10995  * @ctx: the functions context result
10996  *
10997  * Get the error and warning callback informations
10998  *
10999  * Returns -1 in case of error and 0 otherwise
11000  */
11001 int
xmlRelaxNGGetValidErrors(xmlRelaxNGValidCtxtPtr ctxt,xmlRelaxNGValidityErrorFunc * err,xmlRelaxNGValidityWarningFunc * warn,void ** ctx)11002 xmlRelaxNGGetValidErrors(xmlRelaxNGValidCtxtPtr ctxt,
11003                          xmlRelaxNGValidityErrorFunc * err,
11004                          xmlRelaxNGValidityWarningFunc * warn, void **ctx)
11005 {
11006     if (ctxt == NULL)
11007         return (-1);
11008     if (err != NULL)
11009         *err = ctxt->error;
11010     if (warn != NULL)
11011         *warn = ctxt->warning;
11012     if (ctx != NULL)
11013         *ctx = ctxt->userData;
11014     return (0);
11015 }
11016 
11017 /**
11018  * xmlRelaxNGValidateDoc:
11019  * @ctxt:  a Relax-NG validation context
11020  * @doc:  a parsed document tree
11021  *
11022  * Validate a document tree in memory.
11023  *
11024  * Returns 0 if the document is valid, a positive error code
11025  *     number otherwise and -1 in case of internal or API error.
11026  */
11027 int
xmlRelaxNGValidateDoc(xmlRelaxNGValidCtxtPtr ctxt,xmlDocPtr doc)11028 xmlRelaxNGValidateDoc(xmlRelaxNGValidCtxtPtr ctxt, xmlDocPtr doc)
11029 {
11030     int ret;
11031 
11032     if ((ctxt == NULL) || (doc == NULL))
11033         return (-1);
11034 
11035     ctxt->doc = doc;
11036 
11037     ret = xmlRelaxNGValidateDocument(ctxt, doc);
11038     /*
11039      * Remove all left PSVI
11040      */
11041     xmlRelaxNGCleanPSVI((xmlNodePtr) doc);
11042 
11043     /*
11044      * TODO: build error codes
11045      */
11046     if (ret == -1)
11047         return (1);
11048     return (ret);
11049 }
11050 
11051 #define bottom_relaxng
11052 #include "elfgcchack.h"
11053 #endif /* LIBXML_SCHEMAS_ENABLED */
11054