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

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Revision 77 - (show annotations) (download)
Sat Feb 24 21:40:45 2007 UTC (7 years, 4 months ago) by nigel
File MIME type: text/plain
File size: 4924 byte(s)
Load pcre-6.0 into code/trunk.

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) 1997-2005 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 "pcre_internal.h"
46
47
48 /*************************************************
49 * Return info about compiled pattern *
50 *************************************************/
51
52 /* This is a newer "info" function which has an extensible interface so
53 that additional items can be added compatibly.
54
55 Arguments:
56 argument_re points to compiled code
57 extra_data points extra data, or NULL
58 what what information is required
59 where where to put the information
60
61 Returns: 0 if data returned, negative on error
62 */
63
64 EXPORT int
65 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
66 void *where)
67 {
68 real_pcre internal_re;
69 pcre_study_data internal_study;
70 const real_pcre *re = (const real_pcre *)argument_re;
71 const pcre_study_data *study = NULL;
72
73 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
74
75 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
76 study = (const pcre_study_data *)extra_data->study_data;
77
78 if (re->magic_number != MAGIC_NUMBER)
79 {
80 re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
81 if (re == NULL) return PCRE_ERROR_BADMAGIC;
82 if (study != NULL) study = &internal_study;
83 }
84
85 switch (what)
86 {
87 case PCRE_INFO_OPTIONS:
88 *((unsigned long int *)where) = re->options & PUBLIC_OPTIONS;
89 break;
90
91 case PCRE_INFO_SIZE:
92 *((size_t *)where) = re->size;
93 break;
94
95 case PCRE_INFO_STUDYSIZE:
96 *((size_t *)where) = (study == NULL)? 0 : study->size;
97 break;
98
99 case PCRE_INFO_CAPTURECOUNT:
100 *((int *)where) = re->top_bracket;
101 break;
102
103 case PCRE_INFO_BACKREFMAX:
104 *((int *)where) = re->top_backref;
105 break;
106
107 case PCRE_INFO_FIRSTBYTE:
108 *((int *)where) =
109 ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
110 ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
111 break;
112
113 /* Make sure we pass back the pointer to the bit vector in the external
114 block, not the internal copy (with flipped integer fields). */
115
116 case PCRE_INFO_FIRSTTABLE:
117 *((const uschar **)where) =
118 (study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
119 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
120 break;
121
122 case PCRE_INFO_LASTLITERAL:
123 *((int *)where) =
124 ((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
125 break;
126
127 case PCRE_INFO_NAMEENTRYSIZE:
128 *((int *)where) = re->name_entry_size;
129 break;
130
131 case PCRE_INFO_NAMECOUNT:
132 *((int *)where) = re->name_count;
133 break;
134
135 case PCRE_INFO_NAMETABLE:
136 *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
137 break;
138
139 case PCRE_INFO_DEFAULT_TABLES:
140 *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
141 break;
142
143 default: return PCRE_ERROR_BADOPTION;
144 }
145
146 return 0;
147 }
148
149 /* End of pcre_fullinfo.c */

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