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) 1997-2012 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
68#ifdef COMPILE_PCRE8
69PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
70pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
71  int what, void *where)
72#else
73PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
74pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
75  int what, void *where)
76#endif
77{
78const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
79const pcre_study_data *study = NULL;
80
81if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
82
83if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
84  study = (const pcre_study_data *)extra_data->study_data;
85
86/* Check that the first field in the block is the magic number. If it is not,
87return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
88REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
89means that the pattern is likely compiled with different endianness. */
90
91if (re->magic_number != MAGIC_NUMBER)
92  return re->magic_number == REVERSED_MAGIC_NUMBER?
93    PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
94
95/* Check that this pattern was compiled in the correct bit mode */
96
97if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
98
99switch (what)
100  {
101  case PCRE_INFO_OPTIONS:
102  *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
103  break;
104
105  case PCRE_INFO_SIZE:
106  *((size_t *)where) = re->size;
107  break;
108
109  case PCRE_INFO_STUDYSIZE:
110  *((size_t *)where) = (study == NULL)? 0 : study->size;
111  break;
112
113  case PCRE_INFO_JITSIZE:
114#ifdef SUPPORT_JIT
115  *((size_t *)where) =
116      (extra_data != NULL &&
117      (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
118      extra_data->executable_jit != NULL)?
119    PRIV(jit_get_size)(extra_data->executable_jit) : 0;
120#else
121  *((size_t *)where) = 0;
122#endif
123  break;
124
125  case PCRE_INFO_CAPTURECOUNT:
126  *((int *)where) = re->top_bracket;
127  break;
128
129  case PCRE_INFO_BACKREFMAX:
130  *((int *)where) = re->top_backref;
131  break;
132
133  case PCRE_INFO_FIRSTBYTE:
134  *((int *)where) =
135    ((re->flags & PCRE_FIRSTSET) != 0)? re->first_char :
136    ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
137  break;
138
139  /* Make sure we pass back the pointer to the bit vector in the external
140  block, not the internal copy (with flipped integer fields). */
141
142  case PCRE_INFO_FIRSTTABLE:
143  *((const pcre_uint8 **)where) =
144    (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
145      ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
146  break;
147
148  case PCRE_INFO_MINLENGTH:
149  *((int *)where) =
150    (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
151      (int)(study->minlength) : -1;
152  break;
153
154  case PCRE_INFO_JIT:
155  *((int *)where) = extra_data != NULL &&
156                    (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
157                    extra_data->executable_jit != NULL;
158  break;
159
160  case PCRE_INFO_LASTLITERAL:
161  *((int *)where) =
162    ((re->flags & PCRE_REQCHSET) != 0)? re->req_char : -1;
163  break;
164
165  case PCRE_INFO_NAMEENTRYSIZE:
166  *((int *)where) = re->name_entry_size;
167  break;
168
169  case PCRE_INFO_NAMECOUNT:
170  *((int *)where) = re->name_count;
171  break;
172
173  case PCRE_INFO_NAMETABLE:
174  *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
175  break;
176
177  case PCRE_INFO_DEFAULT_TABLES:
178  *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
179  break;
180
181  /* From release 8.00 this will always return TRUE because NOPARTIAL is
182  no longer ever set (the restrictions have been removed). */
183
184  case PCRE_INFO_OKPARTIAL:
185  *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
186  break;
187
188  case PCRE_INFO_JCHANGED:
189  *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
190  break;
191
192  case PCRE_INFO_HASCRORLF:
193  *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
194  break;
195
196  case PCRE_INFO_MAXLOOKBEHIND:
197  *((int *)where) = re->max_lookbehind;
198  break;
199
200  default: return PCRE_ERROR_BADOPTION;
201  }
202
203return 0;
204}
205
206/* End of pcre_fullinfo.c */
207