1/*************************************************
2*      Perl-Compatible Regular Expressions       *
3*************************************************/
4
5/* PCRE is a library of functions to support regular expressions whose syntax
6and 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-----------------------------------------------------------------------------
12Redistribution and use in source and binary forms, with or without
13modification, 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
26THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36POSSIBILITY OF SUCH DAMAGE.
37-----------------------------------------------------------------------------
38*/
39
40
41/* This module contains the external function pcre_fullinfo(), which returns
42information 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
57that additional items can be added compatibly.
58
59Arguments:
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
65Returns:           0 if data returned, negative on error
66*/
67
68PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
69pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
70  void *where)
71{
72real_pcre internal_re;
73pcre_study_data internal_study;
74const real_pcre *re = (const real_pcre *)argument_re;
75const pcre_study_data *study = NULL;
76
77if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
78
79if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
80  study = (const pcre_study_data *)extra_data->study_data;
81
82if (re->magic_number != MAGIC_NUMBER)
83  {
84  re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
85  if (re == NULL) return PCRE_ERROR_BADMAGIC;
86  if (study != NULL) study = &internal_study;
87  }
88
89switch (what)
90  {
91  case PCRE_INFO_OPTIONS:
92  *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
93  break;
94
95  case PCRE_INFO_SIZE:
96  *((size_t *)where) = re->size;
97  break;
98
99  case PCRE_INFO_STUDYSIZE:
100  *((size_t *)where) = (study == NULL)? 0 : study->size;
101  break;
102
103  case PCRE_INFO_CAPTURECOUNT:
104  *((int *)where) = re->top_bracket;
105  break;
106
107  case PCRE_INFO_BACKREFMAX:
108  *((int *)where) = re->top_backref;
109  break;
110
111  case PCRE_INFO_FIRSTBYTE:
112  *((int *)where) =
113    ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte :
114    ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
115  break;
116
117  /* Make sure we pass back the pointer to the bit vector in the external
118  block, not the internal copy (with flipped integer fields). */
119
120  case PCRE_INFO_FIRSTTABLE:
121  *((const uschar **)where) =
122    (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
123      ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
124  break;
125
126  case PCRE_INFO_MINLENGTH:
127  *((int *)where) =
128    (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
129      study->minlength : -1;
130  break;
131
132  case PCRE_INFO_LASTLITERAL:
133  *((int *)where) =
134    ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
135  break;
136
137  case PCRE_INFO_NAMEENTRYSIZE:
138  *((int *)where) = re->name_entry_size;
139  break;
140
141  case PCRE_INFO_NAMECOUNT:
142  *((int *)where) = re->name_count;
143  break;
144
145  case PCRE_INFO_NAMETABLE:
146  *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
147  break;
148
149  case PCRE_INFO_DEFAULT_TABLES:
150  *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
151  break;
152
153  /* From release 8.00 this will always return TRUE because NOPARTIAL is
154  no longer ever set (the restrictions have been removed). */
155
156  case PCRE_INFO_OKPARTIAL:
157  *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
158  break;
159
160  case PCRE_INFO_JCHANGED:
161  *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
162  break;
163
164  case PCRE_INFO_HASCRORLF:
165  *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
166  break;
167
168  default: return PCRE_ERROR_BADOPTION;
169  }
170
171return 0;
172}
173
174/* End of pcre_fullinfo.c */
175