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 /* %ExternalCopyright% */
45
46 #ifdef HAVE_CONFIG_H
47 #include "config.h"
48 #endif
49
50 #include "pcre_internal.h"
51
52
53 /*************************************************
54 * Return info about compiled pattern *
55 *************************************************/
56
57 /* This is a newer "info" function which has an extensible interface so
58 that additional items can be added compatibly.
59
60 Arguments:
61 argument_re points to compiled code
62 extra_data points extra data, or NULL
63 what what information is required
64 where where to put the information
65
66 Returns: 0 if data returned, negative on error
67 */
68
69 #if defined COMPILE_PCRE8
70 #if defined(ERLANG_INTEGRATION)
71 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
erts_pcre_fullinfo(const pcre * argument_re,const erts_pcre_extra * extra_data,int what,void * where)72 erts_pcre_fullinfo(const pcre *argument_re, const erts_pcre_extra *extra_data,
73 int what, void *where)
74 #else
75 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
76 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
77 int what, void *where)
78 #endif
79 #elif defined COMPILE_PCRE16
80 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
81 pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
82 int what, void *where)
83 #elif defined COMPILE_PCRE32
84 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
85 pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data,
86 int what, void *where)
87 #endif
88 {
89 const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
90 const pcre_study_data *study = NULL;
91
92 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
93
94 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
95 study = (const pcre_study_data *)extra_data->study_data;
96
97 /* Check that the first field in the block is the magic number. If it is not,
98 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
99 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
100 means that the pattern is likely compiled with different endianness. */
101
102 if (re->magic_number != MAGIC_NUMBER)
103 return re->magic_number == REVERSED_MAGIC_NUMBER?
104 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
105
106 /* Check that this pattern was compiled in the correct bit mode */
107
108 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
109
110 switch (what)
111 {
112 case PCRE_INFO_OPTIONS:
113 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
114 break;
115
116 case PCRE_INFO_SIZE:
117 *((size_t *)where) = re->size;
118 break;
119
120 case PCRE_INFO_STUDYSIZE:
121 *((size_t *)where) = (study == NULL)? 0 : study->size;
122 break;
123
124 case PCRE_INFO_JITSIZE:
125 #ifdef SUPPORT_JIT
126 *((size_t *)where) =
127 (extra_data != NULL &&
128 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
129 extra_data->executable_jit != NULL)?
130 PRIV(jit_get_size)(extra_data->executable_jit) : 0;
131 #else
132 *((size_t *)where) = 0;
133 #endif
134 break;
135
136 case PCRE_INFO_CAPTURECOUNT:
137 *((int *)where) = re->top_bracket;
138 break;
139
140 case PCRE_INFO_BACKREFMAX:
141 *((int *)where) = re->top_backref;
142 break;
143
144 case PCRE_INFO_FIRSTBYTE:
145 *((int *)where) =
146 ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char :
147 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
148 break;
149
150 case PCRE_INFO_FIRSTCHARACTER:
151 *((pcre_uint32 *)where) =
152 (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0;
153 break;
154
155 case PCRE_INFO_FIRSTCHARACTERFLAGS:
156 *((int *)where) =
157 ((re->flags & PCRE_FIRSTSET) != 0) ? 1 :
158 ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0;
159 break;
160
161 /* Make sure we pass back the pointer to the bit vector in the external
162 block, not the internal copy (with flipped integer fields). */
163
164 case PCRE_INFO_FIRSTTABLE:
165 *((const pcre_uint8 **)where) =
166 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
167 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
168 break;
169
170 case PCRE_INFO_MINLENGTH:
171 *((int *)where) =
172 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
173 (int)(study->minlength) : -1;
174 break;
175
176 case PCRE_INFO_JIT:
177 *((int *)where) = extra_data != NULL &&
178 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
179 extra_data->executable_jit != NULL;
180 break;
181
182 case PCRE_INFO_LASTLITERAL:
183 *((int *)where) =
184 ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1;
185 break;
186
187 case PCRE_INFO_REQUIREDCHAR:
188 *((pcre_uint32 *)where) =
189 ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0;
190 break;
191
192 case PCRE_INFO_REQUIREDCHARFLAGS:
193 *((int *)where) =
194 ((re->flags & PCRE_REQCHSET) != 0);
195 break;
196
197 case PCRE_INFO_NAMEENTRYSIZE:
198 *((int *)where) = re->name_entry_size;
199 break;
200
201 case PCRE_INFO_NAMECOUNT:
202 *((int *)where) = re->name_count;
203 break;
204
205 case PCRE_INFO_NAMETABLE:
206 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
207 break;
208
209 case PCRE_INFO_DEFAULT_TABLES:
210 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
211 break;
212
213 /* From release 8.00 this will always return TRUE because NOPARTIAL is
214 no longer ever set (the restrictions have been removed). */
215
216 case PCRE_INFO_OKPARTIAL:
217 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
218 break;
219
220 case PCRE_INFO_JCHANGED:
221 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
222 break;
223
224 case PCRE_INFO_HASCRORLF:
225 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
226 break;
227
228 case PCRE_INFO_MAXLOOKBEHIND:
229 *((int *)where) = re->max_lookbehind;
230 break;
231
232 case PCRE_INFO_MATCHLIMIT:
233 if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET;
234 *((pcre_uint32 *)where) = re->limit_match;
235 break;
236
237 case PCRE_INFO_RECURSIONLIMIT:
238 if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET;
239 *((pcre_uint32 *)where) = re->limit_recursion;
240 break;
241
242 case PCRE_INFO_MATCH_EMPTY:
243 *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0;
244 break;
245
246 default: return PCRE_ERROR_BADOPTION;
247 }
248
249 return 0;
250 }
251
252 /* End of pcre_fullinfo.c */
253