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) 1997-2012 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 #ifdef 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 #else
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 #endif
75 {
76 const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
77 const pcre_study_data *study = NULL;
78
79 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
80
81 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
82 study = (const pcre_study_data *)extra_data->study_data;
83
84 /* Check that the first field in the block is the magic number. If it is not,
85 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
86 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
87 means that the pattern is likely compiled with different endianness. */
88
89 if (re->magic_number != MAGIC_NUMBER)
90 return re->magic_number == REVERSED_MAGIC_NUMBER?
91 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
92
93 /* Check that this pattern was compiled in the correct bit mode */
94
95 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
96
97 switch (what)
98 {
99 case PCRE_INFO_OPTIONS:
100 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
101 break;
102
103 case PCRE_INFO_SIZE:
104 *((size_t *)where) = re->size;
105 break;
106
107 case PCRE_INFO_STUDYSIZE:
108 *((size_t *)where) = (study == NULL)? 0 : study->size;
109 break;
110
111 case PCRE_INFO_JITSIZE:
112 #ifdef SUPPORT_JIT
113 *((size_t *)where) =
114 (extra_data != NULL &&
115 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
116 extra_data->executable_jit != NULL)?
117 PRIV(jit_get_size)(extra_data->executable_jit) : 0;
118 #else
119 *((size_t *)where) = 0;
120 #endif
121 break;
122
123 case PCRE_INFO_CAPTURECOUNT:
124 *((int *)where) = re->top_bracket;
125 break;
126
127 case PCRE_INFO_BACKREFMAX:
128 *((int *)where) = re->top_backref;
129 break;
130
131 case PCRE_INFO_FIRSTBYTE:
132 *((int *)where) =
133 ((re->flags & PCRE_FIRSTSET) != 0)? re->first_char :
134 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
135 break;
136
137 /* Make sure we pass back the pointer to the bit vector in the external
138 block, not the internal copy (with flipped integer fields). */
139
140 case PCRE_INFO_FIRSTTABLE:
141 *((const pcre_uint8 **)where) =
142 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
143 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
144 break;
145
146 case PCRE_INFO_MINLENGTH:
147 *((int *)where) =
148 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
149 (int)(study->minlength) : -1;
150 break;
151
152 case PCRE_INFO_JIT:
153 *((int *)where) = extra_data != NULL &&
154 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
155 extra_data->executable_jit != NULL;
156 break;
157
158 case PCRE_INFO_LASTLITERAL:
159 *((int *)where) =
160 ((re->flags & PCRE_REQCHSET) != 0)? re->req_char : -1;
161 break;
162
163 case PCRE_INFO_NAMEENTRYSIZE:
164 *((int *)where) = re->name_entry_size;
165 break;
166
167 case PCRE_INFO_NAMECOUNT:
168 *((int *)where) = re->name_count;
169 break;
170
171 case PCRE_INFO_NAMETABLE:
172 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
173 break;
174
175 case PCRE_INFO_DEFAULT_TABLES:
176 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
177 break;
178
179 /* From release 8.00 this will always return TRUE because NOPARTIAL is
180 no longer ever set (the restrictions have been removed). */
181
182 case PCRE_INFO_OKPARTIAL:
183 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
184 break;
185
186 case PCRE_INFO_JCHANGED:
187 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
188 break;
189
190 case PCRE_INFO_HASCRORLF:
191 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
192 break;
193
194 case PCRE_INFO_MAXLOOKBEHIND:
195 *((int *)where) = re->max_lookbehind;
196 break;
197
198 default: return PCRE_ERROR_BADOPTION;
199 }
200
201 return 0;
202 }
203
204 /* End of pcre_fullinfo.c */
205