1 /* $Cambridge: exim/src/src/pcre/pcre_fullinfo.c,v 1.3 2006/11/07 16:50:36 ph10 Exp $ */
3 /*************************************************
4 * Perl-Compatible Regular Expressions *
5 *************************************************/
7 /*PCRE is a library of functions to support regular expressions whose syntax
8 and semantics are as close as possible to those of the Perl 5 language.
10 Written by Philip Hazel
11 Copyright (c) 1997-2006 University of Cambridge
13 -----------------------------------------------------------------------------
14 Redistribution and use in source and binary forms, with or without
15 modification, are permitted provided that the following conditions are met:
17 * Redistributions of source code must retain the above copyright notice,
18 this list of conditions and the following disclaimer.
20 * Redistributions in binary form must reproduce the above copyright
21 notice, this list of conditions and the following disclaimer in the
22 documentation and/or other materials provided with the distribution.
24 * Neither the name of the University of Cambridge nor the names of its
25 contributors may be used to endorse or promote products derived from
26 this software without specific prior written permission.
28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
29 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
32 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 POSSIBILITY OF SUCH DAMAGE.
39 -----------------------------------------------------------------------------
43 /* This module contains the external function pcre_fullinfo(), which returns
44 information about a compiled pattern. */
47 #include "pcre_internal.h"
50 /*************************************************
51 * Return info about compiled pattern *
52 *************************************************/
54 /* This is a newer "info" function which has an extensible interface so
55 that additional items can be added compatibly.
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
63 Returns: 0 if data returned, negative on error
67 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
70 real_pcre internal_re;
71 pcre_study_data internal_study;
72 const real_pcre *re = (const real_pcre *)argument_re;
73 const pcre_study_data *study = NULL;
75 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
77 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
78 study = (const pcre_study_data *)extra_data->study_data;
80 if (re->magic_number != MAGIC_NUMBER)
82 re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
83 if (re == NULL) return PCRE_ERROR_BADMAGIC;
84 if (study != NULL) study = &internal_study;
89 case PCRE_INFO_OPTIONS:
90 *((unsigned long int *)where) = re->options & PUBLIC_OPTIONS;
94 *((size_t *)where) = re->size;
97 case PCRE_INFO_STUDYSIZE:
98 *((size_t *)where) = (study == NULL)? 0 : study->size;
101 case PCRE_INFO_CAPTURECOUNT:
102 *((int *)where) = re->top_bracket;
105 case PCRE_INFO_BACKREFMAX:
106 *((int *)where) = re->top_backref;
109 case PCRE_INFO_FIRSTBYTE:
111 ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
112 ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
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). */
118 case PCRE_INFO_FIRSTTABLE:
119 *((const uschar **)where) =
120 (study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
121 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
124 case PCRE_INFO_LASTLITERAL:
126 ((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
129 case PCRE_INFO_NAMEENTRYSIZE:
130 *((int *)where) = re->name_entry_size;
133 case PCRE_INFO_NAMECOUNT:
134 *((int *)where) = re->name_count;
137 case PCRE_INFO_NAMETABLE:
138 *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
141 case PCRE_INFO_DEFAULT_TABLES:
142 *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
145 default: return PCRE_ERROR_BADOPTION;
151 /* End of pcre_fullinfo.c */