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 #include "config.h"
46
47 #include "pcre_internal.h"
48
49
50 /*************************************************
51 * Return info about compiled pattern *
52 *************************************************/
53
54 /* This is a newer "info" function which has an extensible interface so
55 that additional items can be added compatibly.
56
57 Arguments:
58 argument_re points to compiled code
59 extra_data points extra data, or NULL
60 what what information is required
61 where where to put the information
62
63 Returns: 0 if data returned, negative on error
64 */
65
66 #if defined COMPILE_PCRE8
67 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
pcre_fullinfo(const pcre * argument_re,const pcre_extra * extra_data,int what,void * where)68 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
69 int what, void *where)
70 #elif defined COMPILE_PCRE16
71 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
72 pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
73 int what, void *where)
74 #elif defined COMPILE_PCRE32
75 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
76 pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data,
77 int what, void *where)
78 #endif
79 {
80 const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
81 const pcre_study_data *study = NULL;
82
83 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
84
85 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
86 study = (const pcre_study_data *)extra_data->study_data;
87
88 /* Check that the first field in the block is the magic number. If it is not,
89 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
90 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
91 means that the pattern is likely compiled with different endianness. */
92
93 if (re->magic_number != MAGIC_NUMBER)
94 return re->magic_number == REVERSED_MAGIC_NUMBER?
95 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
96
97 /* Check that this pattern was compiled in the correct bit mode */
98
99 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
100
101 switch (what)
102 {
103 case PCRE_INFO_OPTIONS:
104 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
105 break;
106
107 case PCRE_INFO_SIZE:
108 *((size_t *)where) = re->size;
109 break;
110
111 case PCRE_INFO_STUDYSIZE:
112 *((size_t *)where) = (study == NULL)? 0 : study->size;
113 break;
114
115 case PCRE_INFO_JITSIZE:
116 #ifdef SUPPORT_JIT
117 *((size_t *)where) =
118 (extra_data != NULL &&
119 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
120 extra_data->executable_jit != NULL)?
121 PRIV(jit_get_size)(extra_data->executable_jit) : 0;
122 #else
123 *((size_t *)where) = 0;
124 #endif
125 break;
126
127 case PCRE_INFO_CAPTURECOUNT:
128 *((int *)where) = re->top_bracket;
129 break;
130
131 case PCRE_INFO_BACKREFMAX:
132 *((int *)where) = re->top_backref;
133 break;
134
135 case PCRE_INFO_FIRSTBYTE:
136 *((int *)where) =
137 ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char :
138 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
139 break;
140
141 case PCRE_INFO_FIRSTCHARACTER:
142 *((pcre_uint32 *)where) =
143 (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0;
144 break;
145
146 case PCRE_INFO_FIRSTCHARACTERFLAGS:
147 *((int *)where) =
148 ((re->flags & PCRE_FIRSTSET) != 0) ? 1 :
149 ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0;
150 break;
151
152 /* Make sure we pass back the pointer to the bit vector in the external
153 block, not the internal copy (with flipped integer fields). */
154
155 case PCRE_INFO_FIRSTTABLE:
156 *((const pcre_uint8 **)where) =
157 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
158 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
159 break;
160
161 case PCRE_INFO_MINLENGTH:
162 *((int *)where) =
163 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
164 (int)(study->minlength) : -1;
165 break;
166
167 case PCRE_INFO_JIT:
168 *((int *)where) = extra_data != NULL &&
169 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
170 extra_data->executable_jit != NULL;
171 break;
172
173 case PCRE_INFO_LASTLITERAL:
174 *((int *)where) =
175 ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1;
176 break;
177
178 case PCRE_INFO_REQUIREDCHAR:
179 *((pcre_uint32 *)where) =
180 ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0;
181 break;
182
183 case PCRE_INFO_REQUIREDCHARFLAGS:
184 *((int *)where) =
185 ((re->flags & PCRE_REQCHSET) != 0);
186 break;
187
188 case PCRE_INFO_NAMEENTRYSIZE:
189 *((int *)where) = re->name_entry_size;
190 break;
191
192 case PCRE_INFO_NAMECOUNT:
193 *((int *)where) = re->name_count;
194 break;
195
196 case PCRE_INFO_NAMETABLE:
197 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
198 break;
199
200 case PCRE_INFO_DEFAULT_TABLES:
201 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
202 break;
203
204 /* From release 8.00 this will always return TRUE because NOPARTIAL is
205 no longer ever set (the restrictions have been removed). */
206
207 case PCRE_INFO_OKPARTIAL:
208 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
209 break;
210
211 case PCRE_INFO_JCHANGED:
212 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
213 break;
214
215 case PCRE_INFO_HASCRORLF:
216 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
217 break;
218
219 case PCRE_INFO_MAXLOOKBEHIND:
220 *((int *)where) = re->max_lookbehind;
221 break;
222
223 case PCRE_INFO_MATCHLIMIT:
224 if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET;
225 *((pcre_uint32 *)where) = re->limit_match;
226 break;
227
228 case PCRE_INFO_RECURSIONLIMIT:
229 if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET;
230 *((pcre_uint32 *)where) = re->limit_recursion;
231 break;
232
233 case PCRE_INFO_MATCH_EMPTY:
234 *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0;
235 break;
236
237 default: return PCRE_ERROR_BADOPTION;
238 }
239
240 return 0;
241 }
242
243 /* End of pcre_fullinfo.c */
244
