/[pcre]/code/trunk/pcre_fullinfo.c
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Contents of /code/trunk/pcre_fullinfo.c

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Revision 932 - (show annotations)
Fri Feb 24 18:54:43 2012 UTC (3 years, 3 months ago) by ph10
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File size: 6669 byte(s)
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Add support for PCRE_INFO_MAXLOOKBEHIND.
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 #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 #ifdef COMPILE_PCRE8
69 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
70 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
71 int what, void *where)
72 #else
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 #endif
77 {
78 const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
79 const pcre_study_data *study = NULL;
80
81 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
82
83 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
84 study = (const pcre_study_data *)extra_data->study_data;
85
86 /* Check that the first field in the block is the magic number. If it is not,
87 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
88 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
89 means that the pattern is likely compiled with different endianness. */
90
91 if (re->magic_number != MAGIC_NUMBER)
92 return re->magic_number == REVERSED_MAGIC_NUMBER?
93 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
94
95 /* Check that this pattern was compiled in the correct bit mode */
96
97 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
98
99 switch (what)
100 {
101 case PCRE_INFO_OPTIONS:
102 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
103 break;
104
105 case PCRE_INFO_SIZE:
106 *((size_t *)where) = re->size;
107 break;
108
109 case PCRE_INFO_STUDYSIZE:
110 *((size_t *)where) = (study == NULL)? 0 : study->size;
111 break;
112
113 case PCRE_INFO_JITSIZE:
114 #ifdef SUPPORT_JIT
115 *((size_t *)where) =
116 (extra_data != NULL &&
117 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
118 extra_data->executable_jit != NULL)?
119 PRIV(jit_get_size)(extra_data->executable_jit) : 0;
120 #else
121 *((size_t *)where) = 0;
122 #endif
123 break;
124
125 case PCRE_INFO_CAPTURECOUNT:
126 *((int *)where) = re->top_bracket;
127 break;
128
129 case PCRE_INFO_BACKREFMAX:
130 *((int *)where) = re->top_backref;
131 break;
132
133 case PCRE_INFO_FIRSTBYTE:
134 *((int *)where) =
135 ((re->flags & PCRE_FIRSTSET) != 0)? re->first_char :
136 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
137 break;
138
139 /* Make sure we pass back the pointer to the bit vector in the external
140 block, not the internal copy (with flipped integer fields). */
141
142 case PCRE_INFO_FIRSTTABLE:
143 *((const pcre_uint8 **)where) =
144 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
145 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
146 break;
147
148 case PCRE_INFO_MINLENGTH:
149 *((int *)where) =
150 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
151 (int)(study->minlength) : -1;
152 break;
153
154 case PCRE_INFO_JIT:
155 *((int *)where) = extra_data != NULL &&
156 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
157 extra_data->executable_jit != NULL;
158 break;
159
160 case PCRE_INFO_LASTLITERAL:
161 *((int *)where) =
162 ((re->flags & PCRE_REQCHSET) != 0)? re->req_char : -1;
163 break;
164
165 case PCRE_INFO_NAMEENTRYSIZE:
166 *((int *)where) = re->name_entry_size;
167 break;
168
169 case PCRE_INFO_NAMECOUNT:
170 *((int *)where) = re->name_count;
171 break;
172
173 case PCRE_INFO_NAMETABLE:
174 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
175 break;
176
177 case PCRE_INFO_DEFAULT_TABLES:
178 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
179 break;
180
181 /* From release 8.00 this will always return TRUE because NOPARTIAL is
182 no longer ever set (the restrictions have been removed). */
183
184 case PCRE_INFO_OKPARTIAL:
185 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
186 break;
187
188 case PCRE_INFO_JCHANGED:
189 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
190 break;
191
192 case PCRE_INFO_HASCRORLF:
193 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
194 break;
195
196 case PCRE_INFO_MAXLOOKBEHIND:
197 *((int *)where) = re->max_lookbehind;
198 break;
199
200 default: return PCRE_ERROR_BADOPTION;
201 }
202
203 return 0;
204 }
205
206 /* End of pcre_fullinfo.c */

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