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) 1997-2013 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#if defined 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#elif defined COMPILE_PCRE16
73PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
74pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
75  int what, void *where)
76#elif defined COMPILE_PCRE32
77PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
78pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data,
79  int what, void *where)
80#endif
81{
82const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
83const pcre_study_data *study = NULL;
84
85if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
86
87if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
88  study = (const pcre_study_data *)extra_data->study_data;
89
90/* Check that the first field in the block is the magic number. If it is not,
91return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
92REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
93means that the pattern is likely compiled with different endianness. */
94
95if (re->magic_number != MAGIC_NUMBER)
96  return re->magic_number == REVERSED_MAGIC_NUMBER?
97    PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
98
99/* Check that this pattern was compiled in the correct bit mode */
100
101if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
102
103switch (what)
104  {
105  case PCRE_INFO_OPTIONS:
106  *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
107  break;
108
109  case PCRE_INFO_SIZE:
110  *((size_t *)where) = re->size;
111  break;
112
113  case PCRE_INFO_STUDYSIZE:
114  *((size_t *)where) = (study == NULL)? 0 : study->size;
115  break;
116
117  case PCRE_INFO_JITSIZE:
118#ifdef SUPPORT_JIT
119  *((size_t *)where) =
120      (extra_data != NULL &&
121      (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
122      extra_data->executable_jit != NULL)?
123    PRIV(jit_get_size)(extra_data->executable_jit) : 0;
124#else
125  *((size_t *)where) = 0;
126#endif
127  break;
128
129  case PCRE_INFO_CAPTURECOUNT:
130  *((int *)where) = re->top_bracket;
131  break;
132
133  case PCRE_INFO_BACKREFMAX:
134  *((int *)where) = re->top_backref;
135  break;
136
137  case PCRE_INFO_FIRSTBYTE:
138  *((int *)where) =
139    ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char :
140    ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
141  break;
142
143  case PCRE_INFO_FIRSTCHARACTER:
144    *((pcre_uint32 *)where) =
145      (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0;
146    break;
147
148  case PCRE_INFO_FIRSTCHARACTERFLAGS:
149    *((int *)where) =
150      ((re->flags & PCRE_FIRSTSET) != 0) ? 1 :
151      ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0;
152    break;
153
154  /* Make sure we pass back the pointer to the bit vector in the external
155  block, not the internal copy (with flipped integer fields). */
156
157  case PCRE_INFO_FIRSTTABLE:
158  *((const pcre_uint8 **)where) =
159    (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
160      ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
161  break;
162
163  case PCRE_INFO_MINLENGTH:
164  *((int *)where) =
165    (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
166      (int)(study->minlength) : -1;
167  break;
168
169  case PCRE_INFO_JIT:
170  *((int *)where) = extra_data != NULL &&
171                    (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
172                    extra_data->executable_jit != NULL;
173  break;
174
175  case PCRE_INFO_LASTLITERAL:
176  *((int *)where) =
177    ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1;
178  break;
179
180  case PCRE_INFO_REQUIREDCHAR:
181    *((pcre_uint32 *)where) =
182      ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0;
183    break;
184
185  case PCRE_INFO_REQUIREDCHARFLAGS:
186    *((int *)where) =
187      ((re->flags & PCRE_REQCHSET) != 0);
188    break;
189
190  case PCRE_INFO_NAMEENTRYSIZE:
191  *((int *)where) = re->name_entry_size;
192  break;
193
194  case PCRE_INFO_NAMECOUNT:
195  *((int *)where) = re->name_count;
196  break;
197
198  case PCRE_INFO_NAMETABLE:
199  *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
200  break;
201
202  case PCRE_INFO_DEFAULT_TABLES:
203  *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
204  break;
205
206  /* From release 8.00 this will always return TRUE because NOPARTIAL is
207  no longer ever set (the restrictions have been removed). */
208
209  case PCRE_INFO_OKPARTIAL:
210  *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
211  break;
212
213  case PCRE_INFO_JCHANGED:
214  *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
215  break;
216
217  case PCRE_INFO_HASCRORLF:
218  *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
219  break;
220
221  case PCRE_INFO_MAXLOOKBEHIND:
222  *((int *)where) = re->max_lookbehind;
223  break;
224
225  case PCRE_INFO_MATCHLIMIT:
226  if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET;
227  *((pcre_uint32 *)where) = re->limit_match;
228  break;
229
230  case PCRE_INFO_RECURSIONLIMIT:
231  if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET;
232  *((pcre_uint32 *)where) = re->limit_recursion;
233  break;
234
235  case PCRE_INFO_MATCH_EMPTY:
236  *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0;
237  break;
238
239  default: return PCRE_ERROR_BADOPTION;
240  }
241
242return 0;
243}
244
245/* End of pcre_fullinfo.c */
246