1 /*************************************************
2 * Perl-Compatible Regular Expressions *
3 *************************************************/
4
5 /* PCRE is a library of functions to support regular expressions whose syntax
6 and semantics are as close as possible to those of the Perl 5 language.
7
8 Written by Philip Hazel
9 Copyright (c) 1997-2013 University of Cambridge
10
11 -----------------------------------------------------------------------------
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions are met:
14
15 * Redistributions of source code must retain the above copyright notice,
16 this list of conditions and the following disclaimer.
17
18 * Redistributions in binary form must reproduce the above copyright
19 notice, this list of conditions and the following disclaimer in the
20 documentation and/or other materials provided with the distribution.
21
22 * Neither the name of the University of Cambridge nor the names of its
23 contributors may be used to endorse or promote products derived from
24 this software without specific prior written permission.
25
26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 POSSIBILITY OF SUCH DAMAGE.
37 -----------------------------------------------------------------------------
38 */
39
40
41 /* This module contains the external function pcre_fullinfo(), which returns
42 information about a compiled pattern. */
43
44
45 #ifdef HAVE_CONFIG_H
46 #include "config.h"
47 #endif
48
49 #include "pcre_internal.h"
50
51
52 /*************************************************
53 * Return info about compiled pattern *
54 *************************************************/
55
56 /* This is a newer "info" function which has an extensible interface so
57 that additional items can be added compatibly.
58
59 Arguments:
60 argument_re points to compiled code
61 extra_data points extra data, or NULL
62 what what information is required
63 where where to put the information
64
65 Returns: 0 if data returned, negative on error
66 */
67
68 #if defined COMPILE_PCRE8
69 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
pcre_fullinfo(const pcre * argument_re,const pcre_extra * extra_data,int what,void * where)70 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
71 int what, void *where)
72 #elif defined COMPILE_PCRE16
73 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
74 pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
75 int what, void *where)
76 #elif defined COMPILE_PCRE32
77 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
78 pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data,
79 int what, void *where)
80 #endif
81 {
82 const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
83 const pcre_study_data *study = NULL;
84
85 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
86
87 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
88 study = (const pcre_study_data *)extra_data->study_data;
89
90 /* Check that the first field in the block is the magic number. If it is not,
91 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
92 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
93 means that the pattern is likely compiled with different endianness. */
94
95 if (re->magic_number != MAGIC_NUMBER)
96 return re->magic_number == REVERSED_MAGIC_NUMBER?
97 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
98
99 /* Check that this pattern was compiled in the correct bit mode */
100
101 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
102
103 switch (what)
104 {
105 case PCRE_INFO_OPTIONS:
106 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
107 break;
108
109 case PCRE_INFO_SIZE:
110 *((size_t *)where) = re->size;
111 break;
112
113 case PCRE_INFO_STUDYSIZE:
114 *((size_t *)where) = (study == NULL)? 0 : study->size;
115 break;
116
117 case PCRE_INFO_JITSIZE:
118 #ifdef SUPPORT_JIT
119 *((size_t *)where) =
120 (extra_data != NULL &&
121 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
122 extra_data->executable_jit != NULL)?
123 PRIV(jit_get_size)(extra_data->executable_jit) : 0;
124 #else
125 *((size_t *)where) = 0;
126 #endif
127 break;
128
129 case PCRE_INFO_CAPTURECOUNT:
130 *((int *)where) = re->top_bracket;
131 break;
132
133 case PCRE_INFO_BACKREFMAX:
134 *((int *)where) = re->top_backref;
135 break;
136
137 case PCRE_INFO_FIRSTBYTE:
138 *((int *)where) =
139 ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char :
140 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
141 break;
142
143 case PCRE_INFO_FIRSTCHARACTER:
144 *((pcre_uint32 *)where) =
145 (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0;
146 break;
147
148 case PCRE_INFO_FIRSTCHARACTERFLAGS:
149 *((int *)where) =
150 ((re->flags & PCRE_FIRSTSET) != 0) ? 1 :
151 ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0;
152 break;
153
154 /* Make sure we pass back the pointer to the bit vector in the external
155 block, not the internal copy (with flipped integer fields). */
156
157 case PCRE_INFO_FIRSTTABLE:
158 *((const pcre_uint8 **)where) =
159 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
160 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
161 break;
162
163 case PCRE_INFO_MINLENGTH:
164 *((int *)where) =
165 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
166 (int)(study->minlength) : -1;
167 break;
168
169 case PCRE_INFO_JIT:
170 *((int *)where) = extra_data != NULL &&
171 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
172 extra_data->executable_jit != NULL;
173 break;
174
175 case PCRE_INFO_LASTLITERAL:
176 *((int *)where) =
177 ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1;
178 break;
179
180 case PCRE_INFO_REQUIREDCHAR:
181 *((pcre_uint32 *)where) =
182 ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0;
183 break;
184
185 case PCRE_INFO_REQUIREDCHARFLAGS:
186 *((int *)where) =
187 ((re->flags & PCRE_REQCHSET) != 0);
188 break;
189
190 case PCRE_INFO_NAMEENTRYSIZE:
191 *((int *)where) = re->name_entry_size;
192 break;
193
194 case PCRE_INFO_NAMECOUNT:
195 *((int *)where) = re->name_count;
196 break;
197
198 case PCRE_INFO_NAMETABLE:
199 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
200 break;
201
202 case PCRE_INFO_DEFAULT_TABLES:
203 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
204 break;
205
206 /* From release 8.00 this will always return TRUE because NOPARTIAL is
207 no longer ever set (the restrictions have been removed). */
208
209 case PCRE_INFO_OKPARTIAL:
210 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
211 break;
212
213 case PCRE_INFO_JCHANGED:
214 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
215 break;
216
217 case PCRE_INFO_HASCRORLF:
218 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
219 break;
220
221 case PCRE_INFO_MAXLOOKBEHIND:
222 *((int *)where) = re->max_lookbehind;
223 break;
224
225 case PCRE_INFO_MATCHLIMIT:
226 if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET;
227 *((pcre_uint32 *)where) = re->limit_match;
228 break;
229
230 case PCRE_INFO_RECURSIONLIMIT:
231 if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET;
232 *((pcre_uint32 *)where) = re->limit_recursion;
233 break;
234
235 case PCRE_INFO_MATCH_EMPTY:
236 *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0;
237 break;
238
239 default: return PCRE_ERROR_BADOPTION;
240 }
241
242 return 0;
243 }
244
245 /* End of pcre_fullinfo.c */
246