1 /*
2 * parserInternals.c : Internal routines (and obsolete ones) needed for the
3 * XML and HTML parsers.
4 *
5 * See Copyright for the status of this software.
6 *
7 * daniel@veillard.com
8 */
9
10 #define IN_LIBXML
11 #include "libxml.h"
12
13 #if defined(WIN32) && !defined (__CYGWIN__)
14 #define XML_DIR_SEP '\\'
15 #else
16 #define XML_DIR_SEP '/'
17 #endif
18
19 #include <string.h>
20 #ifdef HAVE_CTYPE_H
21 #include <ctype.h>
22 #endif
23 #ifdef HAVE_STDLIB_H
24 #include <stdlib.h>
25 #endif
26 #ifdef HAVE_SYS_STAT_H
27 #include <sys/stat.h>
28 #endif
29 #ifdef HAVE_FCNTL_H
30 #include <fcntl.h>
31 #endif
32 #ifdef HAVE_UNISTD_H
33 #include <unistd.h>
34 #endif
35 #ifdef HAVE_ZLIB_H
36 #include <zlib.h>
37 #endif
38
39 #include <libxml/xmlmemory.h>
40 #include <libxml/tree.h>
41 #include <libxml/parser.h>
42 #include <libxml/parserInternals.h>
43 #include <libxml/valid.h>
44 #include <libxml/entities.h>
45 #include <libxml/xmlerror.h>
46 #include <libxml/encoding.h>
47 #include <libxml/valid.h>
48 #include <libxml/xmlIO.h>
49 #include <libxml/uri.h>
50 #include <libxml/dict.h>
51 #include <libxml/SAX.h>
52 #ifdef LIBXML_CATALOG_ENABLED
53 #include <libxml/catalog.h>
54 #endif
55 #include <libxml/globals.h>
56 #include <libxml/chvalid.h>
57
58 #define CUR(ctxt) ctxt->input->cur
59 #define END(ctxt) ctxt->input->end
60 #define VALID_CTXT(ctxt) (CUR(ctxt) <= END(ctxt))
61
62 #include "buf.h"
63 #include "enc.h"
64
65 /*
66 * Various global defaults for parsing
67 */
68
69 /**
70 * xmlCheckVersion:
71 * @version: the include version number
72 *
73 * check the compiled lib version against the include one.
74 * This can warn or immediately kill the application
75 */
76 void
xmlCheckVersion(int version)77 xmlCheckVersion(int version) {
78 int myversion = (int) LIBXML_VERSION;
79
80 xmlInitParser();
81
82 if ((myversion / 10000) != (version / 10000)) {
83 xmlGenericError(xmlGenericErrorContext,
84 "Fatal: program compiled against libxml %d using libxml %d\n",
85 (version / 10000), (myversion / 10000));
86 fprintf(stderr,
87 "Fatal: program compiled against libxml %d using libxml %d\n",
88 (version / 10000), (myversion / 10000));
89 }
90 if ((myversion / 100) < (version / 100)) {
91 xmlGenericError(xmlGenericErrorContext,
92 "Warning: program compiled against libxml %d using older %d\n",
93 (version / 100), (myversion / 100));
94 }
95 }
96
97
98 /************************************************************************
99 * *
100 * Some factorized error routines *
101 * *
102 ************************************************************************/
103
104
105 /**
106 * xmlErrMemory:
107 * @ctxt: an XML parser context
108 * @extra: extra informations
109 *
110 * Handle a redefinition of attribute error
111 */
112 void
xmlErrMemory(xmlParserCtxtPtr ctxt,const char * extra)113 xmlErrMemory(xmlParserCtxtPtr ctxt, const char *extra)
114 {
115 if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
116 (ctxt->instate == XML_PARSER_EOF))
117 return;
118 if (ctxt != NULL) {
119 ctxt->errNo = XML_ERR_NO_MEMORY;
120 ctxt->instate = XML_PARSER_EOF;
121 ctxt->disableSAX = 1;
122 }
123 if (extra)
124 __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
125 XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
126 NULL, NULL, 0, 0,
127 "Memory allocation failed : %s\n", extra);
128 else
129 __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
130 XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
131 NULL, NULL, 0, 0, "Memory allocation failed\n");
132 }
133
134 /**
135 * __xmlErrEncoding:
136 * @ctxt: an XML parser context
137 * @xmlerr: the error number
138 * @msg: the error message
139 * @str1: an string info
140 * @str2: an string info
141 *
142 * Handle an encoding error
143 */
144 void
__xmlErrEncoding(xmlParserCtxtPtr ctxt,xmlParserErrors xmlerr,const char * msg,const xmlChar * str1,const xmlChar * str2)145 __xmlErrEncoding(xmlParserCtxtPtr ctxt, xmlParserErrors xmlerr,
146 const char *msg, const xmlChar * str1, const xmlChar * str2)
147 {
148 if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
149 (ctxt->instate == XML_PARSER_EOF))
150 return;
151 if (ctxt != NULL)
152 ctxt->errNo = xmlerr;
153 __xmlRaiseError(NULL, NULL, NULL,
154 ctxt, NULL, XML_FROM_PARSER, xmlerr, XML_ERR_FATAL,
155 NULL, 0, (const char *) str1, (const char *) str2,
156 NULL, 0, 0, msg, str1, str2);
157 if (ctxt != NULL) {
158 ctxt->wellFormed = 0;
159 if (ctxt->recovery == 0)
160 ctxt->disableSAX = 1;
161 }
162 }
163
164 /**
165 * xmlErrInternal:
166 * @ctxt: an XML parser context
167 * @msg: the error message
168 * @str: error informations
169 *
170 * Handle an internal error
171 */
172 static void LIBXML_ATTR_FORMAT(2,0)
xmlErrInternal(xmlParserCtxtPtr ctxt,const char * msg,const xmlChar * str)173 xmlErrInternal(xmlParserCtxtPtr ctxt, const char *msg, const xmlChar * str)
174 {
175 if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
176 (ctxt->instate == XML_PARSER_EOF))
177 return;
178 if (ctxt != NULL)
179 ctxt->errNo = XML_ERR_INTERNAL_ERROR;
180 __xmlRaiseError(NULL, NULL, NULL,
181 ctxt, NULL, XML_FROM_PARSER, XML_ERR_INTERNAL_ERROR,
182 XML_ERR_FATAL, NULL, 0, (const char *) str, NULL, NULL,
183 0, 0, msg, str);
184 if (ctxt != NULL) {
185 ctxt->wellFormed = 0;
186 if (ctxt->recovery == 0)
187 ctxt->disableSAX = 1;
188 }
189 }
190
191 /**
192 * xmlErrEncodingInt:
193 * @ctxt: an XML parser context
194 * @error: the error number
195 * @msg: the error message
196 * @val: an integer value
197 *
198 * n encoding error
199 */
200 static void LIBXML_ATTR_FORMAT(3,0)
xmlErrEncodingInt(xmlParserCtxtPtr ctxt,xmlParserErrors error,const char * msg,int val)201 xmlErrEncodingInt(xmlParserCtxtPtr ctxt, xmlParserErrors error,
202 const char *msg, int val)
203 {
204 if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
205 (ctxt->instate == XML_PARSER_EOF))
206 return;
207 if (ctxt != NULL)
208 ctxt->errNo = error;
209 __xmlRaiseError(NULL, NULL, NULL,
210 ctxt, NULL, XML_FROM_PARSER, error, XML_ERR_FATAL,
211 NULL, 0, NULL, NULL, NULL, val, 0, msg, val);
212 if (ctxt != NULL) {
213 ctxt->wellFormed = 0;
214 if (ctxt->recovery == 0)
215 ctxt->disableSAX = 1;
216 }
217 }
218
219 /**
220 * xmlIsLetter:
221 * @c: an unicode character (int)
222 *
223 * Check whether the character is allowed by the production
224 * [84] Letter ::= BaseChar | Ideographic
225 *
226 * Returns 0 if not, non-zero otherwise
227 */
228 int
xmlIsLetter(int c)229 xmlIsLetter(int c) {
230 return(IS_BASECHAR(c) || IS_IDEOGRAPHIC(c));
231 }
232
233 /************************************************************************
234 * *
235 * Input handling functions for progressive parsing *
236 * *
237 ************************************************************************/
238
239 /* #define DEBUG_INPUT */
240 /* #define DEBUG_STACK */
241 /* #define DEBUG_PUSH */
242
243
244 /* we need to keep enough input to show errors in context */
245 #define LINE_LEN 80
246
247 #ifdef DEBUG_INPUT
248 #define CHECK_BUFFER(in) check_buffer(in)
249
250 static
check_buffer(xmlParserInputPtr in)251 void check_buffer(xmlParserInputPtr in) {
252 if (in->base != xmlBufContent(in->buf->buffer)) {
253 xmlGenericError(xmlGenericErrorContext,
254 "xmlParserInput: base mismatch problem\n");
255 }
256 if (in->cur < in->base) {
257 xmlGenericError(xmlGenericErrorContext,
258 "xmlParserInput: cur < base problem\n");
259 }
260 if (in->cur > in->base + xmlBufUse(in->buf->buffer)) {
261 xmlGenericError(xmlGenericErrorContext,
262 "xmlParserInput: cur > base + use problem\n");
263 }
264 xmlGenericError(xmlGenericErrorContext,"buffer %x : content %x, cur %d, use %d\n",
265 (int) in, (int) xmlBufContent(in->buf->buffer), in->cur - in->base,
266 xmlBufUse(in->buf->buffer));
267 }
268
269 #else
270 #define CHECK_BUFFER(in)
271 #endif
272
273
274 /**
275 * xmlParserInputRead:
276 * @in: an XML parser input
277 * @len: an indicative size for the lookahead
278 *
279 * This function was internal and is deprecated.
280 *
281 * Returns -1 as this is an error to use it.
282 */
283 int
xmlParserInputRead(xmlParserInputPtr in ATTRIBUTE_UNUSED,int len ATTRIBUTE_UNUSED)284 xmlParserInputRead(xmlParserInputPtr in ATTRIBUTE_UNUSED, int len ATTRIBUTE_UNUSED) {
285 return(-1);
286 }
287
288 /**
289 * xmlParserInputGrow:
290 * @in: an XML parser input
291 * @len: an indicative size for the lookahead
292 *
293 * This function increase the input for the parser. It tries to
294 * preserve pointers to the input buffer, and keep already read data
295 *
296 * Returns the amount of char read, or -1 in case of error, 0 indicate the
297 * end of this entity
298 */
299 int
xmlParserInputGrow(xmlParserInputPtr in,int len)300 xmlParserInputGrow(xmlParserInputPtr in, int len) {
301 int ret;
302 size_t indx;
303 const xmlChar *content;
304
305 if ((in == NULL) || (len < 0)) return(-1);
306 #ifdef DEBUG_INPUT
307 xmlGenericError(xmlGenericErrorContext, "Grow\n");
308 #endif
309 if (in->buf == NULL) return(-1);
310 if (in->base == NULL) return(-1);
311 if (in->cur == NULL) return(-1);
312 if (in->buf->buffer == NULL) return(-1);
313
314 CHECK_BUFFER(in);
315
316 indx = in->cur - in->base;
317 if (xmlBufUse(in->buf->buffer) > (unsigned int) indx + INPUT_CHUNK) {
318
319 CHECK_BUFFER(in);
320
321 return(0);
322 }
323 if (in->buf->readcallback != NULL) {
324 ret = xmlParserInputBufferGrow(in->buf, len);
325 } else
326 return(0);
327
328 /*
329 * NOTE : in->base may be a "dangling" i.e. freed pointer in this
330 * block, but we use it really as an integer to do some
331 * pointer arithmetic. Insure will raise it as a bug but in
332 * that specific case, that's not !
333 */
334
335 content = xmlBufContent(in->buf->buffer);
336 if (in->base != content) {
337 /*
338 * the buffer has been reallocated
339 */
340 indx = in->cur - in->base;
341 in->base = content;
342 in->cur = &content[indx];
343 }
344 in->end = xmlBufEnd(in->buf->buffer);
345
346 CHECK_BUFFER(in);
347
348 return(ret);
349 }
350
351 /**
352 * xmlParserInputShrink:
353 * @in: an XML parser input
354 *
355 * This function removes used input for the parser.
356 */
357 void
xmlParserInputShrink(xmlParserInputPtr in)358 xmlParserInputShrink(xmlParserInputPtr in) {
359 size_t used;
360 size_t ret;
361 size_t indx;
362 const xmlChar *content;
363
364 #ifdef DEBUG_INPUT
365 xmlGenericError(xmlGenericErrorContext, "Shrink\n");
366 #endif
367 if (in == NULL) return;
368 if (in->buf == NULL) return;
369 if (in->base == NULL) return;
370 if (in->cur == NULL) return;
371 if (in->buf->buffer == NULL) return;
372
373 CHECK_BUFFER(in);
374
375 used = in->cur - xmlBufContent(in->buf->buffer);
376 /*
377 * Do not shrink on large buffers whose only a tiny fraction
378 * was consumed
379 */
380 if (used > INPUT_CHUNK) {
381 ret = xmlBufShrink(in->buf->buffer, used - LINE_LEN);
382 if (ret > 0) {
383 in->cur -= ret;
384 in->consumed += ret;
385 }
386 in->end = xmlBufEnd(in->buf->buffer);
387 }
388
389 CHECK_BUFFER(in);
390
391 if (xmlBufUse(in->buf->buffer) > INPUT_CHUNK) {
392 return;
393 }
394 xmlParserInputBufferRead(in->buf, 2 * INPUT_CHUNK);
395 content = xmlBufContent(in->buf->buffer);
396 if (in->base != content) {
397 /*
398 * the buffer has been reallocated
399 */
400 indx = in->cur - in->base;
401 in->base = content;
402 in->cur = &content[indx];
403 }
404 in->end = xmlBufEnd(in->buf->buffer);
405
406 CHECK_BUFFER(in);
407 }
408
409 /************************************************************************
410 * *
411 * UTF8 character input and related functions *
412 * *
413 ************************************************************************/
414
415 /**
416 * xmlNextChar:
417 * @ctxt: the XML parser context
418 *
419 * Skip to the next char input char.
420 */
421
422 void
xmlNextChar(xmlParserCtxtPtr ctxt)423 xmlNextChar(xmlParserCtxtPtr ctxt)
424 {
425 if ((ctxt == NULL) || (ctxt->instate == XML_PARSER_EOF) ||
426 (ctxt->input == NULL))
427 return;
428
429 if (!(VALID_CTXT(ctxt))) {
430 xmlErrInternal(ctxt, "Parser input data memory error\n", NULL);
431 ctxt->errNo = XML_ERR_INTERNAL_ERROR;
432 xmlStopParser(ctxt);
433 return;
434 }
435
436 if ((*ctxt->input->cur == 0) &&
437 (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0)) {
438 if ((ctxt->instate != XML_PARSER_COMMENT))
439 xmlPopInput(ctxt);
440 return;
441 }
442
443 if (ctxt->charset == XML_CHAR_ENCODING_UTF8) {
444 const unsigned char *cur;
445 unsigned char c;
446
447 /*
448 * 2.11 End-of-Line Handling
449 * the literal two-character sequence "#xD#xA" or a standalone
450 * literal #xD, an XML processor must pass to the application
451 * the single character #xA.
452 */
453 if (*(ctxt->input->cur) == '\n') {
454 ctxt->input->line++; ctxt->input->col = 1;
455 } else
456 ctxt->input->col++;
457
458 /*
459 * We are supposed to handle UTF8, check it's valid
460 * From rfc2044: encoding of the Unicode values on UTF-8:
461 *
462 * UCS-4 range (hex.) UTF-8 octet sequence (binary)
463 * 0000 0000-0000 007F 0xxxxxxx
464 * 0000 0080-0000 07FF 110xxxxx 10xxxxxx
465 * 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
466 *
467 * Check for the 0x110000 limit too
468 */
469 cur = ctxt->input->cur;
470
471 c = *cur;
472 if (c & 0x80) {
473 if (c == 0xC0)
474 goto encoding_error;
475 if (cur[1] == 0) {
476 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
477 cur = ctxt->input->cur;
478 }
479 if ((cur[1] & 0xc0) != 0x80)
480 goto encoding_error;
481 if ((c & 0xe0) == 0xe0) {
482 unsigned int val;
483
484 if (cur[2] == 0) {
485 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
486 cur = ctxt->input->cur;
487 }
488 if ((cur[2] & 0xc0) != 0x80)
489 goto encoding_error;
490 if ((c & 0xf0) == 0xf0) {
491 if (cur[3] == 0) {
492 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
493 cur = ctxt->input->cur;
494 }
495 if (((c & 0xf8) != 0xf0) ||
496 ((cur[3] & 0xc0) != 0x80))
497 goto encoding_error;
498 /* 4-byte code */
499 ctxt->input->cur += 4;
500 val = (cur[0] & 0x7) << 18;
501 val |= (cur[1] & 0x3f) << 12;
502 val |= (cur[2] & 0x3f) << 6;
503 val |= cur[3] & 0x3f;
504 } else {
505 /* 3-byte code */
506 ctxt->input->cur += 3;
507 val = (cur[0] & 0xf) << 12;
508 val |= (cur[1] & 0x3f) << 6;
509 val |= cur[2] & 0x3f;
510 }
511 if (((val > 0xd7ff) && (val < 0xe000)) ||
512 ((val > 0xfffd) && (val < 0x10000)) ||
513 (val >= 0x110000)) {
514 xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
515 "Char 0x%X out of allowed range\n",
516 val);
517 }
518 } else
519 /* 2-byte code */
520 ctxt->input->cur += 2;
521 } else
522 /* 1-byte code */
523 ctxt->input->cur++;
524
525 ctxt->nbChars++;
526 if (*ctxt->input->cur == 0)
527 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
528 } else {
529 /*
530 * Assume it's a fixed length encoding (1) with
531 * a compatible encoding for the ASCII set, since
532 * XML constructs only use < 128 chars
533 */
534
535 if (*(ctxt->input->cur) == '\n') {
536 ctxt->input->line++; ctxt->input->col = 1;
537 } else
538 ctxt->input->col++;
539 ctxt->input->cur++;
540 ctxt->nbChars++;
541 if (*ctxt->input->cur == 0)
542 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
543 }
544 if ((*ctxt->input->cur == '%') && (!ctxt->html))
545 xmlParserHandlePEReference(ctxt);
546 if ((*ctxt->input->cur == 0) &&
547 (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0))
548 xmlPopInput(ctxt);
549 return;
550 encoding_error:
551 /*
552 * If we detect an UTF8 error that probably mean that the
553 * input encoding didn't get properly advertised in the
554 * declaration header. Report the error and switch the encoding
555 * to ISO-Latin-1 (if you don't like this policy, just declare the
556 * encoding !)
557 */
558 if ((ctxt == NULL) || (ctxt->input == NULL) ||
559 (ctxt->input->end - ctxt->input->cur < 4)) {
560 __xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
561 "Input is not proper UTF-8, indicate encoding !\n",
562 NULL, NULL);
563 } else {
564 char buffer[150];
565
566 snprintf(buffer, 149, "Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n",
567 ctxt->input->cur[0], ctxt->input->cur[1],
568 ctxt->input->cur[2], ctxt->input->cur[3]);
569 __xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
570 "Input is not proper UTF-8, indicate encoding !\n%s",
571 BAD_CAST buffer, NULL);
572 }
573 ctxt->charset = XML_CHAR_ENCODING_8859_1;
574 ctxt->input->cur++;
575 return;
576 }
577
578 /**
579 * xmlCurrentChar:
580 * @ctxt: the XML parser context
581 * @len: pointer to the length of the char read
582 *
583 * The current char value, if using UTF-8 this may actually span multiple
584 * bytes in the input buffer. Implement the end of line normalization:
585 * 2.11 End-of-Line Handling
586 * Wherever an external parsed entity or the literal entity value
587 * of an internal parsed entity contains either the literal two-character
588 * sequence "#xD#xA" or a standalone literal #xD, an XML processor
589 * must pass to the application the single character #xA.
590 * This behavior can conveniently be produced by normalizing all
591 * line breaks to #xA on input, before parsing.)
592 *
593 * Returns the current char value and its length
594 */
595
596 int
xmlCurrentChar(xmlParserCtxtPtr ctxt,int * len)597 xmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
598 if ((ctxt == NULL) || (len == NULL) || (ctxt->input == NULL)) return(0);
599 if (ctxt->instate == XML_PARSER_EOF)
600 return(0);
601
602 if ((*ctxt->input->cur >= 0x20) && (*ctxt->input->cur <= 0x7F)) {
603 *len = 1;
604 return((int) *ctxt->input->cur);
605 }
606 if (ctxt->charset == XML_CHAR_ENCODING_UTF8) {
607 /*
608 * We are supposed to handle UTF8, check it's valid
609 * From rfc2044: encoding of the Unicode values on UTF-8:
610 *
611 * UCS-4 range (hex.) UTF-8 octet sequence (binary)
612 * 0000 0000-0000 007F 0xxxxxxx
613 * 0000 0080-0000 07FF 110xxxxx 10xxxxxx
614 * 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
615 *
616 * Check for the 0x110000 limit too
617 */
618 const unsigned char *cur = ctxt->input->cur;
619 unsigned char c;
620 unsigned int val;
621
622 c = *cur;
623 if (c & 0x80) {
624 if (((c & 0x40) == 0) || (c == 0xC0))
625 goto encoding_error;
626 if (cur[1] == 0) {
627 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
628 cur = ctxt->input->cur;
629 }
630 if ((cur[1] & 0xc0) != 0x80)
631 goto encoding_error;
632 if ((c & 0xe0) == 0xe0) {
633 if (cur[2] == 0) {
634 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
635 cur = ctxt->input->cur;
636 }
637 if ((cur[2] & 0xc0) != 0x80)
638 goto encoding_error;
639 if ((c & 0xf0) == 0xf0) {
640 if (cur[3] == 0) {
641 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
642 cur = ctxt->input->cur;
643 }
644 if (((c & 0xf8) != 0xf0) ||
645 ((cur[3] & 0xc0) != 0x80))
646 goto encoding_error;
647 /* 4-byte code */
648 *len = 4;
649 val = (cur[0] & 0x7) << 18;
650 val |= (cur[1] & 0x3f) << 12;
651 val |= (cur[2] & 0x3f) << 6;
652 val |= cur[3] & 0x3f;
653 if (val < 0x10000)
654 goto encoding_error;
655 } else {
656 /* 3-byte code */
657 *len = 3;
658 val = (cur[0] & 0xf) << 12;
659 val |= (cur[1] & 0x3f) << 6;
660 val |= cur[2] & 0x3f;
661 if (val < 0x800)
662 goto encoding_error;
663 }
664 } else {
665 /* 2-byte code */
666 *len = 2;
667 val = (cur[0] & 0x1f) << 6;
668 val |= cur[1] & 0x3f;
669 if (val < 0x80)
670 goto encoding_error;
671 }
672 if (!IS_CHAR(val)) {
673 xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
674 "Char 0x%X out of allowed range\n", val);
675 }
676 return(val);
677 } else {
678 /* 1-byte code */
679 *len = 1;
680 if (*ctxt->input->cur == 0)
681 xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
682 if ((*ctxt->input->cur == 0) &&
683 (ctxt->input->end > ctxt->input->cur)) {
684 xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
685 "Char 0x0 out of allowed range\n", 0);
686 }
687 if (*ctxt->input->cur == 0xD) {
688 if (ctxt->input->cur[1] == 0xA) {
689 ctxt->nbChars++;
690 ctxt->input->cur++;
691 }
692 return(0xA);
693 }
694 return((int) *ctxt->input->cur);
695 }
696 }
697 /*
698 * Assume it's a fixed length encoding (1) with
699 * a compatible encoding for the ASCII set, since
700 * XML constructs only use < 128 chars
701 */
702 *len = 1;
703 if (*ctxt->input->cur == 0xD) {
704 if (ctxt->input->cur[1] == 0xA) {
705 ctxt->nbChars++;
706 ctxt->input->cur++;
707 }
708 return(0xA);
709 }
710 return((int) *ctxt->input->cur);
711 encoding_error:
712 /*
713 * An encoding problem may arise from a truncated input buffer
714 * splitting a character in the middle. In that case do not raise
715 * an error but return 0 to endicate an end of stream problem
716 */
717 if (ctxt->input->end - ctxt->input->cur < 4) {
718 *len = 0;
719 return(0);
720 }
721
722 /*
723 * If we detect an UTF8 error that probably mean that the
724 * input encoding didn't get properly advertised in the
725 * declaration header. Report the error and switch the encoding
726 * to ISO-Latin-1 (if you don't like this policy, just declare the
727 * encoding !)
728 */
729 {
730 char buffer[150];
731
732 snprintf(&buffer[0], 149, "Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n",
733 ctxt->input->cur[0], ctxt->input->cur[1],
734 ctxt->input->cur[2], ctxt->input->cur[3]);
735 __xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
736 "Input is not proper UTF-8, indicate encoding !\n%s",
737 BAD_CAST buffer, NULL);
738 }
739 ctxt->charset = XML_CHAR_ENCODING_8859_1;
740 *len = 1;
741 return((int) *ctxt->input->cur);
742 }
743
744 /**
745 * xmlStringCurrentChar:
746 * @ctxt: the XML parser context
747 * @cur: pointer to the beginning of the char
748 * @len: pointer to the length of the char read
749 *
750 * The current char value, if using UTF-8 this may actually span multiple
751 * bytes in the input buffer.
752 *
753 * Returns the current char value and its length
754 */
755
756 int
xmlStringCurrentChar(xmlParserCtxtPtr ctxt,const xmlChar * cur,int * len)757 xmlStringCurrentChar(xmlParserCtxtPtr ctxt, const xmlChar * cur, int *len)
758 {
759 if ((len == NULL) || (cur == NULL)) return(0);
760 if ((ctxt == NULL) || (ctxt->charset == XML_CHAR_ENCODING_UTF8)) {
761 /*
762 * We are supposed to handle UTF8, check it's valid
763 * From rfc2044: encoding of the Unicode values on UTF-8:
764 *
765 * UCS-4 range (hex.) UTF-8 octet sequence (binary)
766 * 0000 0000-0000 007F 0xxxxxxx
767 * 0000 0080-0000 07FF 110xxxxx 10xxxxxx
768 * 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
769 *
770 * Check for the 0x110000 limit too
771 */
772 unsigned char c;
773 unsigned int val;
774
775 c = *cur;
776 if (c & 0x80) {
777 if ((cur[1] & 0xc0) != 0x80)
778 goto encoding_error;
779 if ((c & 0xe0) == 0xe0) {
780
781 if ((cur[2] & 0xc0) != 0x80)
782 goto encoding_error;
783 if ((c & 0xf0) == 0xf0) {
784 if (((c & 0xf8) != 0xf0) || ((cur[3] & 0xc0) != 0x80))
785 goto encoding_error;
786 /* 4-byte code */
787 *len = 4;
788 val = (cur[0] & 0x7) << 18;
789 val |= (cur[1] & 0x3f) << 12;
790 val |= (cur[2] & 0x3f) << 6;
791 val |= cur[3] & 0x3f;
792 } else {
793 /* 3-byte code */
794 *len = 3;
795 val = (cur[0] & 0xf) << 12;
796 val |= (cur[1] & 0x3f) << 6;
797 val |= cur[2] & 0x3f;
798 }
799 } else {
800 /* 2-byte code */
801 *len = 2;
802 val = (cur[0] & 0x1f) << 6;
803 val |= cur[1] & 0x3f;
804 }
805 if (!IS_CHAR(val)) {
806 xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
807 "Char 0x%X out of allowed range\n", val);
808 }
809 return (val);
810 } else {
811 /* 1-byte code */
812 *len = 1;
813 return ((int) *cur);
814 }
815 }
816 /*
817 * Assume it's a fixed length encoding (1) with
818 * a compatible encoding for the ASCII set, since
819 * XML constructs only use < 128 chars
820 */
821 *len = 1;
822 return ((int) *cur);
823 encoding_error:
824
825 /*
826 * An encoding problem may arise from a truncated input buffer
827 * splitting a character in the middle. In that case do not raise
828 * an error but return 0 to endicate an end of stream problem
829 */
830 if ((ctxt == NULL) || (ctxt->input == NULL) ||
831 (ctxt->input->end - ctxt->input->cur < 4)) {
832 *len = 0;
833 return(0);
834 }
835 /*
836 * If we detect an UTF8 error that probably mean that the
837 * input encoding didn't get properly advertised in the
838 * declaration header. Report the error and switch the encoding
839 * to ISO-Latin-1 (if you don't like this policy, just declare the
840 * encoding !)
841 */
842 {
843 char buffer[150];
844
845 snprintf(buffer, 149, "Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n",
846 ctxt->input->cur[0], ctxt->input->cur[1],
847 ctxt->input->cur[2], ctxt->input->cur[3]);
848 __xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
849 "Input is not proper UTF-8, indicate encoding !\n%s",
850 BAD_CAST buffer, NULL);
851 }
852 *len = 1;
853 return ((int) *cur);
854 }
855
856 /**
857 * xmlCopyCharMultiByte:
858 * @out: pointer to an array of xmlChar
859 * @val: the char value
860 *
861 * append the char value in the array
862 *
863 * Returns the number of xmlChar written
864 */
865 int
xmlCopyCharMultiByte(xmlChar * out,int val)866 xmlCopyCharMultiByte(xmlChar *out, int val) {
867 if (out == NULL) return(0);
868 /*
869 * We are supposed to handle UTF8, check it's valid
870 * From rfc2044: encoding of the Unicode values on UTF-8:
871 *
872 * UCS-4 range (hex.) UTF-8 octet sequence (binary)
873 * 0000 0000-0000 007F 0xxxxxxx
874 * 0000 0080-0000 07FF 110xxxxx 10xxxxxx
875 * 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
876 */
877 if (val >= 0x80) {
878 xmlChar *savedout = out;
879 int bits;
880 if (val < 0x800) { *out++= (val >> 6) | 0xC0; bits= 0; }
881 else if (val < 0x10000) { *out++= (val >> 12) | 0xE0; bits= 6;}
882 else if (val < 0x110000) { *out++= (val >> 18) | 0xF0; bits= 12; }
883 else {
884 xmlErrEncodingInt(NULL, XML_ERR_INVALID_CHAR,
885 "Internal error, xmlCopyCharMultiByte 0x%X out of bound\n",
886 val);
887 return(0);
888 }
889 for ( ; bits >= 0; bits-= 6)
890 *out++= ((val >> bits) & 0x3F) | 0x80 ;
891 return (out - savedout);
892 }
893 *out = (xmlChar) val;
894 return 1;
895 }
896
897 /**
898 * xmlCopyChar:
899 * @len: Ignored, compatibility
900 * @out: pointer to an array of xmlChar
901 * @val: the char value
902 *
903 * append the char value in the array
904 *
905 * Returns the number of xmlChar written
906 */
907
908 int
xmlCopyChar(int len ATTRIBUTE_UNUSED,xmlChar * out,int val)909 xmlCopyChar(int len ATTRIBUTE_UNUSED, xmlChar *out, int val) {
910 if (out == NULL) return(0);
911 /* the len parameter is ignored */
912 if (val >= 0x80) {
913 return(xmlCopyCharMultiByte (out, val));
914 }
915 *out = (xmlChar) val;
916 return 1;
917 }
918
919 /************************************************************************
920 * *
921 * Commodity functions to switch encodings *
922 * *
923 ************************************************************************/
924
925 static int
926 xmlSwitchToEncodingInt(xmlParserCtxtPtr ctxt,
927 xmlCharEncodingHandlerPtr handler, int len);
928 static int
929 xmlSwitchInputEncodingInt(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
930 xmlCharEncodingHandlerPtr handler, int len);
931 /**
932 * xmlSwitchEncoding:
933 * @ctxt: the parser context
934 * @enc: the encoding value (number)
935 *
936 * change the input functions when discovering the character encoding
937 * of a given entity.
938 *
939 * Returns 0 in case of success, -1 otherwise
940 */
941 int
xmlSwitchEncoding(xmlParserCtxtPtr ctxt,xmlCharEncoding enc)942 xmlSwitchEncoding(xmlParserCtxtPtr ctxt, xmlCharEncoding enc)
943 {
944 xmlCharEncodingHandlerPtr handler;
945 int len = -1;
946 int ret;
947
948 if (ctxt == NULL) return(-1);
949 switch (enc) {
950 case XML_CHAR_ENCODING_ERROR:
951 __xmlErrEncoding(ctxt, XML_ERR_UNKNOWN_ENCODING,
952 "encoding unknown\n", NULL, NULL);
953 return(-1);
954 case XML_CHAR_ENCODING_NONE:
955 /* let's assume it's UTF-8 without the XML decl */
956 ctxt->charset = XML_CHAR_ENCODING_UTF8;
957 return(0);
958 case XML_CHAR_ENCODING_UTF8:
959 /* default encoding, no conversion should be needed */
960 ctxt->charset = XML_CHAR_ENCODING_UTF8;
961
962 /*
963 * Errata on XML-1.0 June 20 2001
964 * Specific handling of the Byte Order Mark for
965 * UTF-8
966 */
967 if ((ctxt->input != NULL) &&
968 (ctxt->input->cur[0] == 0xEF) &&
969 (ctxt->input->cur[1] == 0xBB) &&
970 (ctxt->input->cur[2] == 0xBF)) {
971 ctxt->input->cur += 3;
972 }
973 return(0);
974 case XML_CHAR_ENCODING_UTF16LE:
975 case XML_CHAR_ENCODING_UTF16BE:
976 /*The raw input characters are encoded
977 *in UTF-16. As we expect this function
978 *to be called after xmlCharEncInFunc, we expect
979 *ctxt->input->cur to contain UTF-8 encoded characters.
980 *So the raw UTF16 Byte Order Mark
981 *has also been converted into
982 *an UTF-8 BOM. Let's skip that BOM.
983 */
984 if ((ctxt->input != NULL) && (ctxt->input->cur != NULL) &&
985 (ctxt->input->cur[0] == 0xEF) &&
986 (ctxt->input->cur[1] == 0xBB) &&
987 (ctxt->input->cur[2] == 0xBF)) {
988 ctxt->input->cur += 3;
989 }
990 len = 90;
991 break;
992 case XML_CHAR_ENCODING_UCS2:
993 len = 90;
994 break;
995 case XML_CHAR_ENCODING_UCS4BE:
996 case XML_CHAR_ENCODING_UCS4LE:
997 case XML_CHAR_ENCODING_UCS4_2143:
998 case XML_CHAR_ENCODING_UCS4_3412:
999 len = 180;
1000 break;
1001 case XML_CHAR_ENCODING_EBCDIC:
1002 case XML_CHAR_ENCODING_8859_1:
1003 case XML_CHAR_ENCODING_8859_2:
1004 case XML_CHAR_ENCODING_8859_3:
1005 case XML_CHAR_ENCODING_8859_4:
1006 case XML_CHAR_ENCODING_8859_5:
1007 case XML_CHAR_ENCODING_8859_6:
1008 case XML_CHAR_ENCODING_8859_7:
1009 case XML_CHAR_ENCODING_8859_8:
1010 case XML_CHAR_ENCODING_8859_9:
1011 case XML_CHAR_ENCODING_ASCII:
1012 case XML_CHAR_ENCODING_2022_JP:
1013 case XML_CHAR_ENCODING_SHIFT_JIS:
1014 case XML_CHAR_ENCODING_EUC_JP:
1015 len = 45;
1016 break;
1017 }
1018 handler = xmlGetCharEncodingHandler(enc);
1019 if (handler == NULL) {
1020 /*
1021 * Default handlers.
1022 */
1023 switch (enc) {
1024 case XML_CHAR_ENCODING_ASCII:
1025 /* default encoding, no conversion should be needed */
1026 ctxt->charset = XML_CHAR_ENCODING_UTF8;
1027 return(0);
1028 case XML_CHAR_ENCODING_UTF16LE:
1029 break;
1030 case XML_CHAR_ENCODING_UTF16BE:
1031 break;
1032 case XML_CHAR_ENCODING_UCS4LE:
1033 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1034 "encoding not supported %s\n",
1035 BAD_CAST "USC4 little endian", NULL);
1036 break;
1037 case XML_CHAR_ENCODING_UCS4BE:
1038 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1039 "encoding not supported %s\n",
1040 BAD_CAST "USC4 big endian", NULL);
1041 break;
1042 case XML_CHAR_ENCODING_EBCDIC:
1043 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1044 "encoding not supported %s\n",
1045 BAD_CAST "EBCDIC", NULL);
1046 break;
1047 case XML_CHAR_ENCODING_UCS4_2143:
1048 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1049 "encoding not supported %s\n",
1050 BAD_CAST "UCS4 2143", NULL);
1051 break;
1052 case XML_CHAR_ENCODING_UCS4_3412:
1053 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1054 "encoding not supported %s\n",
1055 BAD_CAST "UCS4 3412", NULL);
1056 break;
1057 case XML_CHAR_ENCODING_UCS2:
1058 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1059 "encoding not supported %s\n",
1060 BAD_CAST "UCS2", NULL);
1061 break;
1062 case XML_CHAR_ENCODING_8859_1:
1063 case XML_CHAR_ENCODING_8859_2:
1064 case XML_CHAR_ENCODING_8859_3:
1065 case XML_CHAR_ENCODING_8859_4:
1066 case XML_CHAR_ENCODING_8859_5:
1067 case XML_CHAR_ENCODING_8859_6:
1068 case XML_CHAR_ENCODING_8859_7:
1069 case XML_CHAR_ENCODING_8859_8:
1070 case XML_CHAR_ENCODING_8859_9:
1071 /*
1072 * We used to keep the internal content in the
1073 * document encoding however this turns being unmaintainable
1074 * So xmlGetCharEncodingHandler() will return non-null
1075 * values for this now.
1076 */
1077 if ((ctxt->inputNr == 1) &&
1078 (ctxt->encoding == NULL) &&
1079 (ctxt->input != NULL) &&
1080 (ctxt->input->encoding != NULL)) {
1081 ctxt->encoding = xmlStrdup(ctxt->input->encoding);
1082 }
1083 ctxt->charset = enc;
1084 return(0);
1085 case XML_CHAR_ENCODING_2022_JP:
1086 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1087 "encoding not supported %s\n",
1088 BAD_CAST "ISO-2022-JP", NULL);
1089 break;
1090 case XML_CHAR_ENCODING_SHIFT_JIS:
1091 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1092 "encoding not supported %s\n",
1093 BAD_CAST "Shift_JIS", NULL);
1094 break;
1095 case XML_CHAR_ENCODING_EUC_JP:
1096 __xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
1097 "encoding not supported %s\n",
1098 BAD_CAST "EUC-JP", NULL);
1099 break;
1100 default:
1101 break;
1102 }
1103 }
1104 if (handler == NULL)
1105 return(-1);
1106 ctxt->charset = XML_CHAR_ENCODING_UTF8;
1107 ret = xmlSwitchToEncodingInt(ctxt, handler, len);
1108 if ((ret < 0) || (ctxt->errNo == XML_I18N_CONV_FAILED)) {
1109 /*
1110 * on encoding conversion errors, stop the parser
1111 */
1112 xmlStopParser(ctxt);
1113 ctxt->errNo = XML_I18N_CONV_FAILED;
1114 }
1115 return(ret);
1116 }
1117
1118 /**
1119 * xmlSwitchInputEncoding:
1120 * @ctxt: the parser context
1121 * @input: the input stream
1122 * @handler: the encoding handler
1123 * @len: the number of bytes to convert for the first line or -1
1124 *
1125 * change the input functions when discovering the character encoding
1126 * of a given entity.
1127 *
1128 * Returns 0 in case of success, -1 otherwise
1129 */
1130 static int
xmlSwitchInputEncodingInt(xmlParserCtxtPtr ctxt,xmlParserInputPtr input,xmlCharEncodingHandlerPtr handler,int len)1131 xmlSwitchInputEncodingInt(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
1132 xmlCharEncodingHandlerPtr handler, int len)
1133 {
1134 int nbchars;
1135
1136 if (handler == NULL)
1137 return (-1);
1138 if (input == NULL)
1139 return (-1);
1140 if (input->buf != NULL) {
1141 if (input->buf->encoder != NULL) {
1142 /*
1143 * Check in case the auto encoding detetection triggered
1144 * in already.
1145 */
1146 if (input->buf->encoder == handler)
1147 return (0);
1148
1149 /*
1150 * "UTF-16" can be used for both LE and BE
1151 if ((!xmlStrncmp(BAD_CAST input->buf->encoder->name,
1152 BAD_CAST "UTF-16", 6)) &&
1153 (!xmlStrncmp(BAD_CAST handler->name,
1154 BAD_CAST "UTF-16", 6))) {
1155 return(0);
1156 }
1157 */
1158
1159 /*
1160 * Note: this is a bit dangerous, but that's what it
1161 * takes to use nearly compatible signature for different
1162 * encodings.
1163 */
1164 xmlCharEncCloseFunc(input->buf->encoder);
1165 input->buf->encoder = handler;
1166 return (0);
1167 }
1168 input->buf->encoder = handler;
1169
1170 /*
1171 * Is there already some content down the pipe to convert ?
1172 */
1173 if (xmlBufIsEmpty(input->buf->buffer) == 0) {
1174 int processed;
1175 unsigned int use;
1176
1177 /*
1178 * Specific handling of the Byte Order Mark for
1179 * UTF-16
1180 */
1181 if ((handler->name != NULL) &&
1182 (!strcmp(handler->name, "UTF-16LE") ||
1183 !strcmp(handler->name, "UTF-16")) &&
1184 (input->cur[0] == 0xFF) && (input->cur[1] == 0xFE)) {
1185 input->cur += 2;
1186 }
1187 if ((handler->name != NULL) &&
1188 (!strcmp(handler->name, "UTF-16BE")) &&
1189 (input->cur[0] == 0xFE) && (input->cur[1] == 0xFF)) {
1190 input->cur += 2;
1191 }
1192 /*
1193 * Errata on XML-1.0 June 20 2001
1194 * Specific handling of the Byte Order Mark for
1195 * UTF-8
1196 */
1197 if ((handler->name != NULL) &&
1198 (!strcmp(handler->name, "UTF-8")) &&
1199 (input->cur[0] == 0xEF) &&
1200 (input->cur[1] == 0xBB) && (input->cur[2] == 0xBF)) {
1201 input->cur += 3;
1202 }
1203
1204 /*
1205 * Shrink the current input buffer.
1206 * Move it as the raw buffer and create a new input buffer
1207 */
1208 processed = input->cur - input->base;
1209 xmlBufShrink(input->buf->buffer, processed);
1210 input->buf->raw = input->buf->buffer;
1211 input->buf->buffer = xmlBufCreate();
1212 input->buf->rawconsumed = processed;
1213 use = xmlBufUse(input->buf->raw);
1214
1215 if (ctxt->html) {
1216 /*
1217 * convert as much as possible of the buffer
1218 */
1219 nbchars = xmlCharEncInput(input->buf, 1);
1220 } else {
1221 /*
1222 * convert just enough to get
1223 * '<?xml version="1.0" encoding="xxx"?>'
1224 * parsed with the autodetected encoding
1225 * into the parser reading buffer.
1226 */
1227 nbchars = xmlCharEncFirstLineInput(input->buf, len);
1228 }
1229 if (nbchars < 0) {
1230 xmlErrInternal(ctxt,
1231 "switching encoding: encoder error\n",
1232 NULL);
1233 return (-1);
1234 }
1235 input->buf->rawconsumed += use - xmlBufUse(input->buf->raw);
1236 xmlBufResetInput(input->buf->buffer, input);
1237 }
1238 return (0);
1239 } else if (input->length == 0) {
1240 /*
1241 * When parsing a static memory array one must know the
1242 * size to be able to convert the buffer.
1243 */
1244 xmlErrInternal(ctxt, "switching encoding : no input\n", NULL);
1245 return (-1);
1246 }
1247 return (0);
1248 }
1249
1250 /**
1251 * xmlSwitchInputEncoding:
1252 * @ctxt: the parser context
1253 * @input: the input stream
1254 * @handler: the encoding handler
1255 *
1256 * change the input functions when discovering the character encoding
1257 * of a given entity.
1258 *
1259 * Returns 0 in case of success, -1 otherwise
1260 */
1261 int
xmlSwitchInputEncoding(xmlParserCtxtPtr ctxt,xmlParserInputPtr input,xmlCharEncodingHandlerPtr handler)1262 xmlSwitchInputEncoding(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
1263 xmlCharEncodingHandlerPtr handler) {
1264 return(xmlSwitchInputEncodingInt(ctxt, input, handler, -1));
1265 }
1266
1267 /**
1268 * xmlSwitchToEncodingInt:
1269 * @ctxt: the parser context
1270 * @handler: the encoding handler
1271 * @len: the length to convert or -1
1272 *
1273 * change the input functions when discovering the character encoding
1274 * of a given entity, and convert only @len bytes of the output, this
1275 * is needed on auto detect to allows any declared encoding later to
1276 * convert the actual content after the xmlDecl
1277 *
1278 * Returns 0 in case of success, -1 otherwise
1279 */
1280 static int
xmlSwitchToEncodingInt(xmlParserCtxtPtr ctxt,xmlCharEncodingHandlerPtr handler,int len)1281 xmlSwitchToEncodingInt(xmlParserCtxtPtr ctxt,
1282 xmlCharEncodingHandlerPtr handler, int len) {
1283 int ret = 0;
1284
1285 if (handler != NULL) {
1286 if (ctxt->input != NULL) {
1287 ret = xmlSwitchInputEncodingInt(ctxt, ctxt->input, handler, len);
1288 } else {
1289 xmlErrInternal(ctxt, "xmlSwitchToEncoding : no input\n",
1290 NULL);
1291 return(-1);
1292 }
1293 /*
1294 * The parsing is now done in UTF8 natively
1295 */
1296 ctxt->charset = XML_CHAR_ENCODING_UTF8;
1297 } else
1298 return(-1);
1299 return(ret);
1300 }
1301
1302 /**
1303 * xmlSwitchToEncoding:
1304 * @ctxt: the parser context
1305 * @handler: the encoding handler
1306 *
1307 * change the input functions when discovering the character encoding
1308 * of a given entity.
1309 *
1310 * Returns 0 in case of success, -1 otherwise
1311 */
1312 int
xmlSwitchToEncoding(xmlParserCtxtPtr ctxt,xmlCharEncodingHandlerPtr handler)1313 xmlSwitchToEncoding(xmlParserCtxtPtr ctxt, xmlCharEncodingHandlerPtr handler)
1314 {
1315 return (xmlSwitchToEncodingInt(ctxt, handler, -1));
1316 }
1317
1318 /************************************************************************
1319 * *
1320 * Commodity functions to handle entities processing *
1321 * *
1322 ************************************************************************/
1323
1324 /**
1325 * xmlFreeInputStream:
1326 * @input: an xmlParserInputPtr
1327 *
1328 * Free up an input stream.
1329 */
1330 void
xmlFreeInputStream(xmlParserInputPtr input)1331 xmlFreeInputStream(xmlParserInputPtr input) {
1332 if (input == NULL) return;
1333
1334 if (input->filename != NULL) xmlFree((char *) input->filename);
1335 if (input->directory != NULL) xmlFree((char *) input->directory);
1336 if (input->encoding != NULL) xmlFree((char *) input->encoding);
1337 if (input->version != NULL) xmlFree((char *) input->version);
1338 if ((input->free != NULL) && (input->base != NULL))
1339 input->free((xmlChar *) input->base);
1340 if (input->buf != NULL)
1341 xmlFreeParserInputBuffer(input->buf);
1342 xmlFree(input);
1343 }
1344
1345 /**
1346 * xmlNewInputStream:
1347 * @ctxt: an XML parser context
1348 *
1349 * Create a new input stream structure.
1350 *
1351 * Returns the new input stream or NULL
1352 */
1353 xmlParserInputPtr
xmlNewInputStream(xmlParserCtxtPtr ctxt)1354 xmlNewInputStream(xmlParserCtxtPtr ctxt) {
1355 xmlParserInputPtr input;
1356
1357 input = (xmlParserInputPtr) xmlMalloc(sizeof(xmlParserInput));
1358 if (input == NULL) {
1359 xmlErrMemory(ctxt, "couldn't allocate a new input stream\n");
1360 return(NULL);
1361 }
1362 memset(input, 0, sizeof(xmlParserInput));
1363 input->line = 1;
1364 input->col = 1;
1365 input->standalone = -1;
1366
1367 /*
1368 * If the context is NULL the id cannot be initialized, but that
1369 * should not happen while parsing which is the situation where
1370 * the id is actually needed.
1371 */
1372 if (ctxt != NULL)
1373 input->id = ctxt->input_id++;
1374
1375 return(input);
1376 }
1377
1378 /**
1379 * xmlNewIOInputStream:
1380 * @ctxt: an XML parser context
1381 * @input: an I/O Input
1382 * @enc: the charset encoding if known
1383 *
1384 * Create a new input stream structure encapsulating the @input into
1385 * a stream suitable for the parser.
1386 *
1387 * Returns the new input stream or NULL
1388 */
1389 xmlParserInputPtr
xmlNewIOInputStream(xmlParserCtxtPtr ctxt,xmlParserInputBufferPtr input,xmlCharEncoding enc)1390 xmlNewIOInputStream(xmlParserCtxtPtr ctxt, xmlParserInputBufferPtr input,
1391 xmlCharEncoding enc) {
1392 xmlParserInputPtr inputStream;
1393
1394 if (input == NULL) return(NULL);
1395 if (xmlParserDebugEntities)
1396 xmlGenericError(xmlGenericErrorContext, "new input from I/O\n");
1397 inputStream = xmlNewInputStream(ctxt);
1398 if (inputStream == NULL) {
1399 return(NULL);
1400 }
1401 inputStream->filename = NULL;
1402 inputStream->buf = input;
1403 xmlBufResetInput(inputStream->buf->buffer, inputStream);
1404
1405 if (enc != XML_CHAR_ENCODING_NONE) {
1406 xmlSwitchEncoding(ctxt, enc);
1407 }
1408
1409 return(inputStream);
1410 }
1411
1412 /**
1413 * xmlNewEntityInputStream:
1414 * @ctxt: an XML parser context
1415 * @entity: an Entity pointer
1416 *
1417 * Create a new input stream based on an xmlEntityPtr
1418 *
1419 * Returns the new input stream or NULL
1420 */
1421 xmlParserInputPtr
xmlNewEntityInputStream(xmlParserCtxtPtr ctxt,xmlEntityPtr entity)1422 xmlNewEntityInputStream(xmlParserCtxtPtr ctxt, xmlEntityPtr entity) {
1423 xmlParserInputPtr input;
1424
1425 if (entity == NULL) {
1426 xmlErrInternal(ctxt, "xmlNewEntityInputStream entity = NULL\n",
1427 NULL);
1428 return(NULL);
1429 }
1430 if (xmlParserDebugEntities)
1431 xmlGenericError(xmlGenericErrorContext,
1432 "new input from entity: %s\n", entity->name);
1433 if (entity->content == NULL) {
1434 switch (entity->etype) {
1435 case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
1436 xmlErrInternal(ctxt, "Cannot parse entity %s\n",
1437 entity->name);
1438 break;
1439 case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
1440 case XML_EXTERNAL_PARAMETER_ENTITY:
1441 return(xmlLoadExternalEntity((char *) entity->URI,
1442 (char *) entity->ExternalID, ctxt));
1443 case XML_INTERNAL_GENERAL_ENTITY:
1444 xmlErrInternal(ctxt,
1445 "Internal entity %s without content !\n",
1446 entity->name);
1447 break;
1448 case XML_INTERNAL_PARAMETER_ENTITY:
1449 xmlErrInternal(ctxt,
1450 "Internal parameter entity %s without content !\n",
1451 entity->name);
1452 break;
1453 case XML_INTERNAL_PREDEFINED_ENTITY:
1454 xmlErrInternal(ctxt,
1455 "Predefined entity %s without content !\n",
1456 entity->name);
1457 break;
1458 }
1459 return(NULL);
1460 }
1461 input = xmlNewInputStream(ctxt);
1462 if (input == NULL) {
1463 return(NULL);
1464 }
1465 if (entity->URI != NULL)
1466 input->filename = (char *) xmlStrdup((xmlChar *) entity->URI);
1467 input->base = entity->content;
1468 if (entity->length == 0)
1469 entity->length = xmlStrlen(entity->content);
1470 input->cur = entity->content;
1471 input->length = entity->length;
1472 input->end = &entity->content[input->length];
1473 return(input);
1474 }
1475
1476 /**
1477 * xmlNewStringInputStream:
1478 * @ctxt: an XML parser context
1479 * @buffer: an memory buffer
1480 *
1481 * Create a new input stream based on a memory buffer.
1482 * Returns the new input stream
1483 */
1484 xmlParserInputPtr
xmlNewStringInputStream(xmlParserCtxtPtr ctxt,const xmlChar * buffer)1485 xmlNewStringInputStream(xmlParserCtxtPtr ctxt, const xmlChar *buffer) {
1486 xmlParserInputPtr input;
1487
1488 if (buffer == NULL) {
1489 xmlErrInternal(ctxt, "xmlNewStringInputStream string = NULL\n",
1490 NULL);
1491 return(NULL);
1492 }
1493 if (xmlParserDebugEntities)
1494 xmlGenericError(xmlGenericErrorContext,
1495 "new fixed input: %.30s\n", buffer);
1496 input = xmlNewInputStream(ctxt);
1497 if (input == NULL) {
1498 xmlErrMemory(ctxt, "couldn't allocate a new input stream\n");
1499 return(NULL);
1500 }
1501 input->base = buffer;
1502 input->cur = buffer;
1503 input->length = xmlStrlen(buffer);
1504 input->end = &buffer[input->length];
1505 return(input);
1506 }
1507
1508 /**
1509 * xmlNewInputFromFile:
1510 * @ctxt: an XML parser context
1511 * @filename: the filename to use as entity
1512 *
1513 * Create a new input stream based on a file or an URL.
1514 *
1515 * Returns the new input stream or NULL in case of error
1516 */
1517 xmlParserInputPtr
xmlNewInputFromFile(xmlParserCtxtPtr ctxt,const char * filename)1518 xmlNewInputFromFile(xmlParserCtxtPtr ctxt, const char *filename) {
1519 xmlParserInputBufferPtr buf;
1520 xmlParserInputPtr inputStream;
1521 char *directory = NULL;
1522 xmlChar *URI = NULL;
1523
1524 if (xmlParserDebugEntities)
1525 xmlGenericError(xmlGenericErrorContext,
1526 "new input from file: %s\n", filename);
1527 if (ctxt == NULL) return(NULL);
1528 buf = xmlParserInputBufferCreateFilename(filename, XML_CHAR_ENCODING_NONE);
1529 if (buf == NULL) {
1530 if (filename == NULL)
1531 __xmlLoaderErr(ctxt,
1532 "failed to load external entity: NULL filename \n",
1533 NULL);
1534 else
1535 __xmlLoaderErr(ctxt, "failed to load external entity \"%s\"\n",
1536 (const char *) filename);
1537 return(NULL);
1538 }
1539
1540 inputStream = xmlNewInputStream(ctxt);
1541 if (inputStream == NULL)
1542 return(NULL);
1543
1544 inputStream->buf = buf;
1545 inputStream = xmlCheckHTTPInput(ctxt, inputStream);
1546 if (inputStream == NULL)
1547 return(NULL);
1548
1549 if (inputStream->filename == NULL)
1550 URI = xmlStrdup((xmlChar *) filename);
1551 else
1552 URI = xmlStrdup((xmlChar *) inputStream->filename);
1553 directory = xmlParserGetDirectory((const char *) URI);
1554 if (inputStream->filename != NULL) xmlFree((char *)inputStream->filename);
1555 inputStream->filename = (char *) xmlCanonicPath((const xmlChar *) URI);
1556 if (URI != NULL) xmlFree((char *) URI);
1557 inputStream->directory = directory;
1558
1559 xmlBufResetInput(inputStream->buf->buffer, inputStream);
1560 if ((ctxt->directory == NULL) && (directory != NULL))
1561 ctxt->directory = (char *) xmlStrdup((const xmlChar *) directory);
1562 return(inputStream);
1563 }
1564
1565 /************************************************************************
1566 * *
1567 * Commodity functions to handle parser contexts *
1568 * *
1569 ************************************************************************/
1570
1571 /**
1572 * xmlInitParserCtxt:
1573 * @ctxt: an XML parser context
1574 *
1575 * Initialize a parser context
1576 *
1577 * Returns 0 in case of success and -1 in case of error
1578 */
1579
1580 int
xmlInitParserCtxt(xmlParserCtxtPtr ctxt)1581 xmlInitParserCtxt(xmlParserCtxtPtr ctxt)
1582 {
1583 xmlParserInputPtr input;
1584
1585 if(ctxt==NULL) {
1586 xmlErrInternal(NULL, "Got NULL parser context\n", NULL);
1587 return(-1);
1588 }
1589
1590 xmlDefaultSAXHandlerInit();
1591
1592 if (ctxt->dict == NULL)
1593 ctxt->dict = xmlDictCreate();
1594 if (ctxt->dict == NULL) {
1595 xmlErrMemory(NULL, "cannot initialize parser context\n");
1596 return(-1);
1597 }
1598 xmlDictSetLimit(ctxt->dict, XML_MAX_DICTIONARY_LIMIT);
1599
1600 if (ctxt->sax == NULL)
1601 ctxt->sax = (xmlSAXHandler *) xmlMalloc(sizeof(xmlSAXHandler));
1602 if (ctxt->sax == NULL) {
1603 xmlErrMemory(NULL, "cannot initialize parser context\n");
1604 return(-1);
1605 }
1606 else
1607 xmlSAXVersion(ctxt->sax, 2);
1608
1609 ctxt->maxatts = 0;
1610 ctxt->atts = NULL;
1611 /* Allocate the Input stack */
1612 if (ctxt->inputTab == NULL) {
1613 ctxt->inputTab = (xmlParserInputPtr *)
1614 xmlMalloc(5 * sizeof(xmlParserInputPtr));
1615 ctxt->inputMax = 5;
1616 }
1617 if (ctxt->inputTab == NULL) {
1618 xmlErrMemory(NULL, "cannot initialize parser context\n");
1619 ctxt->inputNr = 0;
1620 ctxt->inputMax = 0;
1621 ctxt->input = NULL;
1622 return(-1);
1623 }
1624 while ((input = inputPop(ctxt)) != NULL) { /* Non consuming */
1625 xmlFreeInputStream(input);
1626 }
1627 ctxt->inputNr = 0;
1628 ctxt->input = NULL;
1629
1630 ctxt->version = NULL;
1631 ctxt->encoding = NULL;
1632 ctxt->standalone = -1;
1633 ctxt->hasExternalSubset = 0;
1634 ctxt->hasPErefs = 0;
1635 ctxt->html = 0;
1636 ctxt->external = 0;
1637 ctxt->instate = XML_PARSER_START;
1638 ctxt->token = 0;
1639 ctxt->directory = NULL;
1640
1641 /* Allocate the Node stack */
1642 if (ctxt->nodeTab == NULL) {
1643 ctxt->nodeTab = (xmlNodePtr *) xmlMalloc(10 * sizeof(xmlNodePtr));
1644 ctxt->nodeMax = 10;
1645 }
1646 if (ctxt->nodeTab == NULL) {
1647 xmlErrMemory(NULL, "cannot initialize parser context\n");
1648 ctxt->nodeNr = 0;
1649 ctxt->nodeMax = 0;
1650 ctxt->node = NULL;
1651 ctxt->inputNr = 0;
1652 ctxt->inputMax = 0;
1653 ctxt->input = NULL;
1654 return(-1);
1655 }
1656 ctxt->nodeNr = 0;
1657 ctxt->node = NULL;
1658
1659 /* Allocate the Name stack */
1660 if (ctxt->nameTab == NULL) {
1661 ctxt->nameTab = (const xmlChar **) xmlMalloc(10 * sizeof(xmlChar *));
1662 ctxt->nameMax = 10;
1663 }
1664 if (ctxt->nameTab == NULL) {
1665 xmlErrMemory(NULL, "cannot initialize parser context\n");
1666 ctxt->nodeNr = 0;
1667 ctxt->nodeMax = 0;
1668 ctxt->node = NULL;
1669 ctxt->inputNr = 0;
1670 ctxt->inputMax = 0;
1671 ctxt->input = NULL;
1672 ctxt->nameNr = 0;
1673 ctxt->nameMax = 0;
1674 ctxt->name = NULL;
1675 return(-1);
1676 }
1677 ctxt->nameNr = 0;
1678 ctxt->name = NULL;
1679
1680 /* Allocate the space stack */
1681 if (ctxt->spaceTab == NULL) {
1682 ctxt->spaceTab = (int *) xmlMalloc(10 * sizeof(int));
1683 ctxt->spaceMax = 10;
1684 }
1685 if (ctxt->spaceTab == NULL) {
1686 xmlErrMemory(NULL, "cannot initialize parser context\n");
1687 ctxt->nodeNr = 0;
1688 ctxt->nodeMax = 0;
1689 ctxt->node = NULL;
1690 ctxt->inputNr = 0;
1691 ctxt->inputMax = 0;
1692 ctxt->input = NULL;
1693 ctxt->nameNr = 0;
1694 ctxt->nameMax = 0;
1695 ctxt->name = NULL;
1696 ctxt->spaceNr = 0;
1697 ctxt->spaceMax = 0;
1698 ctxt->space = NULL;
1699 return(-1);
1700 }
1701 ctxt->spaceNr = 1;
1702 ctxt->spaceMax = 10;
1703 ctxt->spaceTab[0] = -1;
1704 ctxt->space = &ctxt->spaceTab[0];
1705 ctxt->userData = ctxt;
1706 ctxt->myDoc = NULL;
1707 ctxt->wellFormed = 1;
1708 ctxt->nsWellFormed = 1;
1709 ctxt->valid = 1;
1710 ctxt->loadsubset = xmlLoadExtDtdDefaultValue;
1711 if (ctxt->loadsubset) {
1712 ctxt->options |= XML_PARSE_DTDLOAD;
1713 }
1714 ctxt->validate = xmlDoValidityCheckingDefaultValue;
1715 ctxt->pedantic = xmlPedanticParserDefaultValue;
1716 if (ctxt->pedantic) {
1717 ctxt->options |= XML_PARSE_PEDANTIC;
1718 }
1719 ctxt->linenumbers = xmlLineNumbersDefaultValue;
1720 ctxt->keepBlanks = xmlKeepBlanksDefaultValue;
1721 if (ctxt->keepBlanks == 0) {
1722 ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace;
1723 ctxt->options |= XML_PARSE_NOBLANKS;
1724 }
1725
1726 ctxt->vctxt.finishDtd = XML_CTXT_FINISH_DTD_0;
1727 ctxt->vctxt.userData = ctxt;
1728 ctxt->vctxt.error = xmlParserValidityError;
1729 ctxt->vctxt.warning = xmlParserValidityWarning;
1730 if (ctxt->validate) {
1731 if (xmlGetWarningsDefaultValue == 0)
1732 ctxt->vctxt.warning = NULL;
1733 else
1734 ctxt->vctxt.warning = xmlParserValidityWarning;
1735 ctxt->vctxt.nodeMax = 0;
1736 ctxt->options |= XML_PARSE_DTDVALID;
1737 }
1738 ctxt->replaceEntities = xmlSubstituteEntitiesDefaultValue;
1739 if (ctxt->replaceEntities) {
1740 ctxt->options |= XML_PARSE_NOENT;
1741 }
1742 ctxt->record_info = 0;
1743 ctxt->nbChars = 0;
1744 ctxt->checkIndex = 0;
1745 ctxt->inSubset = 0;
1746 ctxt->errNo = XML_ERR_OK;
1747 ctxt->depth = 0;
1748 ctxt->charset = XML_CHAR_ENCODING_UTF8;
1749 ctxt->catalogs = NULL;
1750 ctxt->nbentities = 0;
1751 ctxt->sizeentities = 0;
1752 ctxt->sizeentcopy = 0;
1753 ctxt->input_id = 1;
1754 xmlInitNodeInfoSeq(&ctxt->node_seq);
1755 return(0);
1756 }
1757
1758 /**
1759 * xmlFreeParserCtxt:
1760 * @ctxt: an XML parser context
1761 *
1762 * Free all the memory used by a parser context. However the parsed
1763 * document in ctxt->myDoc is not freed.
1764 */
1765
1766 void
xmlFreeParserCtxt(xmlParserCtxtPtr ctxt)1767 xmlFreeParserCtxt(xmlParserCtxtPtr ctxt)
1768 {
1769 xmlParserInputPtr input;
1770
1771 if (ctxt == NULL) return;
1772
1773 while ((input = inputPop(ctxt)) != NULL) { /* Non consuming */
1774 xmlFreeInputStream(input);
1775 }
1776 if (ctxt->spaceTab != NULL) xmlFree(ctxt->spaceTab);
1777 if (ctxt->nameTab != NULL) xmlFree((xmlChar * *)ctxt->nameTab);
1778 if (ctxt->nodeTab != NULL) xmlFree(ctxt->nodeTab);
1779 if (ctxt->nodeInfoTab != NULL) xmlFree(ctxt->nodeInfoTab);
1780 if (ctxt->inputTab != NULL) xmlFree(ctxt->inputTab);
1781 if (ctxt->version != NULL) xmlFree((char *) ctxt->version);
1782 if (ctxt->encoding != NULL) xmlFree((char *) ctxt->encoding);
1783 if (ctxt->extSubURI != NULL) xmlFree((char *) ctxt->extSubURI);
1784 if (ctxt->extSubSystem != NULL) xmlFree((char *) ctxt->extSubSystem);
1785 #ifdef LIBXML_SAX1_ENABLED
1786 if ((ctxt->sax != NULL) &&
1787 (ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler))
1788 #else
1789 if (ctxt->sax != NULL)
1790 #endif /* LIBXML_SAX1_ENABLED */
1791 xmlFree(ctxt->sax);
1792 if (ctxt->directory != NULL) xmlFree((char *) ctxt->directory);
1793 if (ctxt->vctxt.nodeTab != NULL) xmlFree(ctxt->vctxt.nodeTab);
1794 if (ctxt->atts != NULL) xmlFree((xmlChar * *)ctxt->atts);
1795 if (ctxt->dict != NULL) xmlDictFree(ctxt->dict);
1796 if (ctxt->nsTab != NULL) xmlFree((char *) ctxt->nsTab);
1797 if (ctxt->pushTab != NULL) xmlFree(ctxt->pushTab);
1798 if (ctxt->attallocs != NULL) xmlFree(ctxt->attallocs);
1799 if (ctxt->attsDefault != NULL)
1800 xmlHashFree(ctxt->attsDefault, (xmlHashDeallocator) xmlFree);
1801 if (ctxt->attsSpecial != NULL)
1802 xmlHashFree(ctxt->attsSpecial, NULL);
1803 if (ctxt->freeElems != NULL) {
1804 xmlNodePtr cur, next;
1805
1806 cur = ctxt->freeElems;
1807 while (cur != NULL) {
1808 next = cur->next;
1809 xmlFree(cur);
1810 cur = next;
1811 }
1812 }
1813 if (ctxt->freeAttrs != NULL) {
1814 xmlAttrPtr cur, next;
1815
1816 cur = ctxt->freeAttrs;
1817 while (cur != NULL) {
1818 next = cur->next;
1819 xmlFree(cur);
1820 cur = next;
1821 }
1822 }
1823 /*
1824 * cleanup the error strings
1825 */
1826 if (ctxt->lastError.message != NULL)
1827 xmlFree(ctxt->lastError.message);
1828 if (ctxt->lastError.file != NULL)
1829 xmlFree(ctxt->lastError.file);
1830 if (ctxt->lastError.str1 != NULL)
1831 xmlFree(ctxt->lastError.str1);
1832 if (ctxt->lastError.str2 != NULL)
1833 xmlFree(ctxt->lastError.str2);
1834 if (ctxt->lastError.str3 != NULL)
1835 xmlFree(ctxt->lastError.str3);
1836
1837 #ifdef LIBXML_CATALOG_ENABLED
1838 if (ctxt->catalogs != NULL)
1839 xmlCatalogFreeLocal(ctxt->catalogs);
1840 #endif
1841 xmlFree(ctxt);
1842 }
1843
1844 /**
1845 * xmlNewParserCtxt:
1846 *
1847 * Allocate and initialize a new parser context.
1848 *
1849 * Returns the xmlParserCtxtPtr or NULL
1850 */
1851
1852 xmlParserCtxtPtr
xmlNewParserCtxt(void)1853 xmlNewParserCtxt(void)
1854 {
1855 xmlParserCtxtPtr ctxt;
1856
1857 ctxt = (xmlParserCtxtPtr) xmlMalloc(sizeof(xmlParserCtxt));
1858 if (ctxt == NULL) {
1859 xmlErrMemory(NULL, "cannot allocate parser context\n");
1860 return(NULL);
1861 }
1862 memset(ctxt, 0, sizeof(xmlParserCtxt));
1863 if (xmlInitParserCtxt(ctxt) < 0) {
1864 xmlFreeParserCtxt(ctxt);
1865 return(NULL);
1866 }
1867 return(ctxt);
1868 }
1869
1870 /************************************************************************
1871 * *
1872 * Handling of node informations *
1873 * *
1874 ************************************************************************/
1875
1876 /**
1877 * xmlClearParserCtxt:
1878 * @ctxt: an XML parser context
1879 *
1880 * Clear (release owned resources) and reinitialize a parser context
1881 */
1882
1883 void
xmlClearParserCtxt(xmlParserCtxtPtr ctxt)1884 xmlClearParserCtxt(xmlParserCtxtPtr ctxt)
1885 {
1886 if (ctxt==NULL)
1887 return;
1888 xmlClearNodeInfoSeq(&ctxt->node_seq);
1889 xmlCtxtReset(ctxt);
1890 }
1891
1892
1893 /**
1894 * xmlParserFindNodeInfo:
1895 * @ctx: an XML parser context
1896 * @node: an XML node within the tree
1897 *
1898 * Find the parser node info struct for a given node
1899 *
1900 * Returns an xmlParserNodeInfo block pointer or NULL
1901 */
1902 const xmlParserNodeInfo *
xmlParserFindNodeInfo(const xmlParserCtxtPtr ctx,const xmlNodePtr node)1903 xmlParserFindNodeInfo(const xmlParserCtxtPtr ctx, const xmlNodePtr node)
1904 {
1905 unsigned long pos;
1906
1907 if ((ctx == NULL) || (node == NULL))
1908 return (NULL);
1909 /* Find position where node should be at */
1910 pos = xmlParserFindNodeInfoIndex(&ctx->node_seq, node);
1911 if (pos < ctx->node_seq.length
1912 && ctx->node_seq.buffer[pos].node == node)
1913 return &ctx->node_seq.buffer[pos];
1914 else
1915 return NULL;
1916 }
1917
1918
1919 /**
1920 * xmlInitNodeInfoSeq:
1921 * @seq: a node info sequence pointer
1922 *
1923 * -- Initialize (set to initial state) node info sequence
1924 */
1925 void
xmlInitNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)1926 xmlInitNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)
1927 {
1928 if (seq == NULL)
1929 return;
1930 seq->length = 0;
1931 seq->maximum = 0;
1932 seq->buffer = NULL;
1933 }
1934
1935 /**
1936 * xmlClearNodeInfoSeq:
1937 * @seq: a node info sequence pointer
1938 *
1939 * -- Clear (release memory and reinitialize) node
1940 * info sequence
1941 */
1942 void
xmlClearNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)1943 xmlClearNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)
1944 {
1945 if (seq == NULL)
1946 return;
1947 if (seq->buffer != NULL)
1948 xmlFree(seq->buffer);
1949 xmlInitNodeInfoSeq(seq);
1950 }
1951
1952 /**
1953 * xmlParserFindNodeInfoIndex:
1954 * @seq: a node info sequence pointer
1955 * @node: an XML node pointer
1956 *
1957 *
1958 * xmlParserFindNodeInfoIndex : Find the index that the info record for
1959 * the given node is or should be at in a sorted sequence
1960 *
1961 * Returns a long indicating the position of the record
1962 */
1963 unsigned long
xmlParserFindNodeInfoIndex(const xmlParserNodeInfoSeqPtr seq,const xmlNodePtr node)1964 xmlParserFindNodeInfoIndex(const xmlParserNodeInfoSeqPtr seq,
1965 const xmlNodePtr node)
1966 {
1967 unsigned long upper, lower, middle;
1968 int found = 0;
1969
1970 if ((seq == NULL) || (node == NULL))
1971 return ((unsigned long) -1);
1972
1973 /* Do a binary search for the key */
1974 lower = 1;
1975 upper = seq->length;
1976 middle = 0;
1977 while (lower <= upper && !found) {
1978 middle = lower + (upper - lower) / 2;
1979 if (node == seq->buffer[middle - 1].node)
1980 found = 1;
1981 else if (node < seq->buffer[middle - 1].node)
1982 upper = middle - 1;
1983 else
1984 lower = middle + 1;
1985 }
1986
1987 /* Return position */
1988 if (middle == 0 || seq->buffer[middle - 1].node < node)
1989 return middle;
1990 else
1991 return middle - 1;
1992 }
1993
1994
1995 /**
1996 * xmlParserAddNodeInfo:
1997 * @ctxt: an XML parser context
1998 * @info: a node info sequence pointer
1999 *
2000 * Insert node info record into the sorted sequence
2001 */
2002 void
xmlParserAddNodeInfo(xmlParserCtxtPtr ctxt,const xmlParserNodeInfoPtr info)2003 xmlParserAddNodeInfo(xmlParserCtxtPtr ctxt,
2004 const xmlParserNodeInfoPtr info)
2005 {
2006 unsigned long pos;
2007
2008 if ((ctxt == NULL) || (info == NULL)) return;
2009
2010 /* Find pos and check to see if node is already in the sequence */
2011 pos = xmlParserFindNodeInfoIndex(&ctxt->node_seq, (xmlNodePtr)
2012 info->node);
2013
2014 if ((pos < ctxt->node_seq.length) &&
2015 (ctxt->node_seq.buffer != NULL) &&
2016 (ctxt->node_seq.buffer[pos].node == info->node)) {
2017 ctxt->node_seq.buffer[pos] = *info;
2018 }
2019
2020 /* Otherwise, we need to add new node to buffer */
2021 else {
2022 if ((ctxt->node_seq.length + 1 > ctxt->node_seq.maximum) ||
2023 (ctxt->node_seq.buffer == NULL)) {
2024 xmlParserNodeInfo *tmp_buffer;
2025 unsigned int byte_size;
2026
2027 if (ctxt->node_seq.maximum == 0)
2028 ctxt->node_seq.maximum = 2;
2029 byte_size = (sizeof(*ctxt->node_seq.buffer) *
2030 (2 * ctxt->node_seq.maximum));
2031
2032 if (ctxt->node_seq.buffer == NULL)
2033 tmp_buffer = (xmlParserNodeInfo *) xmlMalloc(byte_size);
2034 else
2035 tmp_buffer =
2036 (xmlParserNodeInfo *) xmlRealloc(ctxt->node_seq.buffer,
2037 byte_size);
2038
2039 if (tmp_buffer == NULL) {
2040 xmlErrMemory(ctxt, "failed to allocate buffer\n");
2041 return;
2042 }
2043 ctxt->node_seq.buffer = tmp_buffer;
2044 ctxt->node_seq.maximum *= 2;
2045 }
2046
2047 /* If position is not at end, move elements out of the way */
2048 if (pos != ctxt->node_seq.length) {
2049 unsigned long i;
2050
2051 for (i = ctxt->node_seq.length; i > pos; i--)
2052 ctxt->node_seq.buffer[i] = ctxt->node_seq.buffer[i - 1];
2053 }
2054
2055 /* Copy element and increase length */
2056 ctxt->node_seq.buffer[pos] = *info;
2057 ctxt->node_seq.length++;
2058 }
2059 }
2060
2061 /************************************************************************
2062 * *
2063 * Defaults settings *
2064 * *
2065 ************************************************************************/
2066 /**
2067 * xmlPedanticParserDefault:
2068 * @val: int 0 or 1
2069 *
2070 * Set and return the previous value for enabling pedantic warnings.
2071 *
2072 * Returns the last value for 0 for no substitution, 1 for substitution.
2073 */
2074
2075 int
xmlPedanticParserDefault(int val)2076 xmlPedanticParserDefault(int val) {
2077 int old = xmlPedanticParserDefaultValue;
2078
2079 xmlPedanticParserDefaultValue = val;
2080 return(old);
2081 }
2082
2083 /**
2084 * xmlLineNumbersDefault:
2085 * @val: int 0 or 1
2086 *
2087 * Set and return the previous value for enabling line numbers in elements
2088 * contents. This may break on old application and is turned off by default.
2089 *
2090 * Returns the last value for 0 for no substitution, 1 for substitution.
2091 */
2092
2093 int
xmlLineNumbersDefault(int val)2094 xmlLineNumbersDefault(int val) {
2095 int old = xmlLineNumbersDefaultValue;
2096
2097 xmlLineNumbersDefaultValue = val;
2098 return(old);
2099 }
2100
2101 /**
2102 * xmlSubstituteEntitiesDefault:
2103 * @val: int 0 or 1
2104 *
2105 * Set and return the previous value for default entity support.
2106 * Initially the parser always keep entity references instead of substituting
2107 * entity values in the output. This function has to be used to change the
2108 * default parser behavior
2109 * SAX::substituteEntities() has to be used for changing that on a file by
2110 * file basis.
2111 *
2112 * Returns the last value for 0 for no substitution, 1 for substitution.
2113 */
2114
2115 int
xmlSubstituteEntitiesDefault(int val)2116 xmlSubstituteEntitiesDefault(int val) {
2117 int old = xmlSubstituteEntitiesDefaultValue;
2118
2119 xmlSubstituteEntitiesDefaultValue = val;
2120 return(old);
2121 }
2122
2123 /**
2124 * xmlKeepBlanksDefault:
2125 * @val: int 0 or 1
2126 *
2127 * Set and return the previous value for default blanks text nodes support.
2128 * The 1.x version of the parser used an heuristic to try to detect
2129 * ignorable white spaces. As a result the SAX callback was generating
2130 * xmlSAX2IgnorableWhitespace() callbacks instead of characters() one, and when
2131 * using the DOM output text nodes containing those blanks were not generated.
2132 * The 2.x and later version will switch to the XML standard way and
2133 * ignorableWhitespace() are only generated when running the parser in
2134 * validating mode and when the current element doesn't allow CDATA or
2135 * mixed content.
2136 * This function is provided as a way to force the standard behavior
2137 * on 1.X libs and to switch back to the old mode for compatibility when
2138 * running 1.X client code on 2.X . Upgrade of 1.X code should be done
2139 * by using xmlIsBlankNode() commodity function to detect the "empty"
2140 * nodes generated.
2141 * This value also affect autogeneration of indentation when saving code
2142 * if blanks sections are kept, indentation is not generated.
2143 *
2144 * Returns the last value for 0 for no substitution, 1 for substitution.
2145 */
2146
2147 int
xmlKeepBlanksDefault(int val)2148 xmlKeepBlanksDefault(int val) {
2149 int old = xmlKeepBlanksDefaultValue;
2150
2151 xmlKeepBlanksDefaultValue = val;
2152 if (!val) xmlIndentTreeOutput = 1;
2153 return(old);
2154 }
2155
2156 #define bottom_parserInternals
2157 #include "elfgcchack.h"
2158