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) 1997-2009 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 : PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
67 : pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
68 : void *where)
69 2567468 : {
70 : real_pcre internal_re;
71 : pcre_study_data internal_study;
72 2567468 : const real_pcre *re = (const real_pcre *)argument_re;
73 2567468 : const pcre_study_data *study = NULL;
74 :
75 2567468 : if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
76 :
77 2567468 : if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
78 8 : study = (const pcre_study_data *)extra_data->study_data;
79 :
80 2567468 : if (re->magic_number != MAGIC_NUMBER)
81 : {
82 0 : re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
83 0 : if (re == NULL) return PCRE_ERROR_BADMAGIC;
84 0 : if (study != NULL) study = &internal_study;
85 : }
86 :
87 2567468 : switch (what)
88 : {
89 : case PCRE_INFO_OPTIONS:
90 0 : *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
91 0 : break;
92 :
93 : case PCRE_INFO_SIZE:
94 0 : *((size_t *)where) = re->size;
95 0 : break;
96 :
97 : case PCRE_INFO_STUDYSIZE:
98 0 : *((size_t *)where) = (study == NULL)? 0 : study->size;
99 0 : break;
100 :
101 : case PCRE_INFO_CAPTURECOUNT:
102 1284308 : *((int *)where) = re->top_bracket;
103 1284308 : break;
104 :
105 : case PCRE_INFO_BACKREFMAX:
106 0 : *((int *)where) = re->top_backref;
107 0 : break;
108 :
109 : case PCRE_INFO_FIRSTBYTE:
110 0 : *((int *)where) =
111 : ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte :
112 : ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
113 0 : break;
114 :
115 : /* Make sure we pass back the pointer to the bit vector in the external
116 : block, not the internal copy (with flipped integer fields). */
117 :
118 : case PCRE_INFO_FIRSTTABLE:
119 0 : *((const uschar **)where) =
120 : (study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
121 : ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
122 0 : break;
123 :
124 : case PCRE_INFO_LASTLITERAL:
125 0 : *((int *)where) =
126 : ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
127 0 : break;
128 :
129 : case PCRE_INFO_NAMEENTRYSIZE:
130 12 : *((int *)where) = re->name_entry_size;
131 12 : break;
132 :
133 : case PCRE_INFO_NAMECOUNT:
134 1283129 : *((int *)where) = re->name_count;
135 1283129 : break;
136 :
137 : case PCRE_INFO_NAMETABLE:
138 12 : *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
139 12 : break;
140 :
141 : case PCRE_INFO_DEFAULT_TABLES:
142 7 : *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
143 7 : break;
144 :
145 : case PCRE_INFO_OKPARTIAL:
146 0 : *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
147 0 : break;
148 :
149 : case PCRE_INFO_JCHANGED:
150 0 : *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
151 0 : break;
152 :
153 : case PCRE_INFO_HASCRORLF:
154 0 : *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
155 0 : break;
156 :
157 0 : default: return PCRE_ERROR_BADOPTION;
158 : }
159 :
160 2567468 : return 0;
161 : }
162 :
163 : /* End of pcre_fullinfo.c */
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