code/trunk/pcre_fullinfo.c

/*************************************************
*      Perl-Compatible Regular Expressions       *
*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel
           Copyright (c) 1997-2013 University of Cambridge

-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
-----------------------------------------------------------------------------
*/


/* This module contains the external function pcre_fullinfo(), which returns
information about a compiled pattern. */


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "pcre_internal.h"


/*************************************************
*        Return info about compiled pattern      *
*************************************************/

/* This is a newer "info" function which has an extensible interface so
that additional items can be added compatibly.

Arguments:
  argument_re      points to compiled code
  extra_data       points extra data, or NULL
  what             what information is required
  where            where to put the information

Returns:           0 if data returned, negative on error
*/

#if defined COMPILE_PCRE8
PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
  int what, void *where)
#elif defined COMPILE_PCRE16
PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
  int what, void *where)
#elif defined COMPILE_PCRE32
PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data,
  int what, void *where)
#endif
{
const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
const pcre_study_data *study = NULL;

if (re == NULL || where == NULL) return PCRE_ERROR_NULL;

if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
  study = (const pcre_study_data *)extra_data->study_data;

/* Check that the first field in the block is the magic number. If it is not,
return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
means that the pattern is likely compiled with different endianness. */

if (re->magic_number != MAGIC_NUMBER)
  return re->magic_number == REVERSED_MAGIC_NUMBER?
    PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;

/* Check that this pattern was compiled in the correct bit mode */

if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;

switch (what)
  {
  case PCRE_INFO_OPTIONS:
  *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
  break;

  case PCRE_INFO_SIZE:
  *((size_t *)where) = re->size;
  break;

  case PCRE_INFO_STUDYSIZE:
  *((size_t *)where) = (study == NULL)? 0 : study->size;
  break;

  case PCRE_INFO_JITSIZE:
#ifdef SUPPORT_JIT
  *((size_t *)where) =
      (extra_data != NULL &&
      (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
      extra_data->executable_jit != NULL)?
    PRIV(jit_get_size)(extra_data->executable_jit) : 0;
#else
  *((size_t *)where) = 0;
#endif
  break;

  case PCRE_INFO_CAPTURECOUNT:
  *((int *)where) = re->top_bracket;
  break;

  case PCRE_INFO_BACKREFMAX:
  *((int *)where) = re->top_backref;
  break;

  case PCRE_INFO_FIRSTBYTE:
  *((int *)where) =
    ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char :
    ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
  break;

  case PCRE_INFO_FIRSTCHARACTER:
    *((pcre_uint32 *)where) =
      (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0;
    break;

  case PCRE_INFO_FIRSTCHARACTERFLAGS:
    *((int *)where) =
      ((re->flags & PCRE_FIRSTSET) != 0) ? 1 :
      ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0;
    break;

  /* Make sure we pass back the pointer to the bit vector in the external
  block, not the internal copy (with flipped integer fields). */

  case PCRE_INFO_FIRSTTABLE:
  *((const pcre_uint8 **)where) =
    (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
      ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
  break;

  case PCRE_INFO_MINLENGTH:
  *((int *)where) =
    (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
      (int)(study->minlength) : -1;
  break;

  case PCRE_INFO_JIT:
  *((int *)where) = extra_data != NULL &&
                    (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
                    extra_data->executable_jit != NULL;
  break;

  case PCRE_INFO_LASTLITERAL:
  *((int *)where) =
    ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1;
  break;

  case PCRE_INFO_REQUIREDCHAR:
    *((pcre_uint32 *)where) =
      ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0;
    break;

  case PCRE_INFO_REQUIREDCHARFLAGS:
    *((int *)where) =
      ((re->flags & PCRE_REQCHSET) != 0);
    break;

  case PCRE_INFO_NAMEENTRYSIZE:
  *((int *)where) = re->name_entry_size;
  break;

  case PCRE_INFO_NAMECOUNT:
  *((int *)where) = re->name_count;
  break;

  case PCRE_INFO_NAMETABLE:
  *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
  break;

  case PCRE_INFO_DEFAULT_TABLES:
  *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
  break;

  /* From release 8.00 this will always return TRUE because NOPARTIAL is
  no longer ever set (the restrictions have been removed). */

  case PCRE_INFO_OKPARTIAL:
  *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
  break;

  case PCRE_INFO_JCHANGED:
  *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
  break;

  case PCRE_INFO_HASCRORLF:
  *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
  break;

  case PCRE_INFO_MAXLOOKBEHIND:
  *((int *)where) = re->max_lookbehind;
  break;

  case PCRE_INFO_MATCHLIMIT:
  if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET;
  *((pcre_uint32 *)where) = re->limit_match;
  break;

  case PCRE_INFO_RECURSIONLIMIT:
  if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET;
  *((pcre_uint32 *)where) = re->limit_recursion;
  break;

  default: return PCRE_ERROR_BADOPTION;
  }

return 0;
}

/* End of pcre_fullinfo.c */
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) 1997-2013 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	#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
57	that additional items can be added compatibly.
58
59	Arguments:
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
65	Returns: 0 if data returned, negative on error
66	*/
67
68	#if defined COMPILE_PCRE8
69	PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
70	pcre_fullinfo(const pcre argument_re, const pcre_extra extra_data,
71	int what, void *where)
72	#elif defined COMPILE_PCRE16
73	PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
74	pcre16_fullinfo(const pcre16 argument_re, const pcre16_extra extra_data,
75	int what, void *where)
76	#elif defined COMPILE_PCRE32
77	PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
78	pcre32_fullinfo(const pcre32 argument_re, const pcre32_extra extra_data,
79	int what, void *where)
80	#endif
81	{
82	const REAL_PCRE re = (const REAL_PCRE )argument_re;
83	const pcre_study_data *study = NULL;
84
85	if (re == NULL \|\| where == NULL) return PCRE_ERROR_NULL;
86
87	if (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,
91	return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
92	REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
93	means that the pattern is likely compiled with different endianness. */
94
95	if (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
101	if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
102
103	switch (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	default: return PCRE_ERROR_BADOPTION;
236	}
237
238	return 0;
239	}
240
241	/* End of pcre_fullinfo.c */
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