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) 1997-2006 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 : PCRE_DATA_SCOPE int
65 : pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
66 : void *where)
67 42397 : {
68 : real_pcre internal_re;
69 : pcre_study_data internal_study;
70 42397 : const real_pcre *re = (const real_pcre *)argument_re;
71 42397 : const pcre_study_data *study = NULL;
72 :
73 42397 : if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
74 :
75 42397 : if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
76 0 : study = (const pcre_study_data *)extra_data->study_data;
77 :
78 42397 : if (re->magic_number != MAGIC_NUMBER)
79 : {
80 0 : re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
81 0 : if (re == NULL) return PCRE_ERROR_BADMAGIC;
82 0 : if (study != NULL) study = &internal_study;
83 : }
84 :
85 42397 : switch (what)
86 : {
87 : case PCRE_INFO_OPTIONS:
88 0 : *((unsigned long int *)where) = re->options & PUBLIC_OPTIONS;
89 0 : break;
90 :
91 : case PCRE_INFO_SIZE:
92 0 : *((size_t *)where) = re->size;
93 0 : break;
94 :
95 : case PCRE_INFO_STUDYSIZE:
96 0 : *((size_t *)where) = (study == NULL)? 0 : study->size;
97 0 : break;
98 :
99 : case PCRE_INFO_CAPTURECOUNT:
100 21253 : *((int *)where) = re->top_bracket;
101 21253 : break;
102 :
103 : case PCRE_INFO_BACKREFMAX:
104 0 : *((int *)where) = re->top_backref;
105 0 : break;
106 :
107 : case PCRE_INFO_FIRSTBYTE:
108 0 : *((int *)where) =
109 : ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
110 : ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
111 0 : 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 0 : *((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 0 : break;
121 :
122 : case PCRE_INFO_LASTLITERAL:
123 0 : *((int *)where) =
124 : ((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
125 0 : break;
126 :
127 : case PCRE_INFO_NAMEENTRYSIZE:
128 0 : *((int *)where) = re->name_entry_size;
129 0 : break;
130 :
131 : case PCRE_INFO_NAMECOUNT:
132 21144 : *((int *)where) = re->name_count;
133 21144 : break;
134 :
135 : case PCRE_INFO_NAMETABLE:
136 0 : *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
137 0 : break;
138 :
139 : case PCRE_INFO_DEFAULT_TABLES:
140 0 : *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
141 0 : break;
142 :
143 0 : default: return PCRE_ERROR_BADOPTION;
144 : }
145 :
146 42397 : return 0;
147 : }
148 :
149 : /* End of pcre_fullinfo.c */
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