libio/string/pcre_fullinfo.c

/* $Id: pcre_fullinfo.c 33 2005-10-02 20:50:00Z knight $ */

/*************************************************
*      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) 1997-2005 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. */


#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
*/

EXPORT int
pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
  void *where)
{
real_pcre internal_re;
pcre_study_data internal_study;
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;

if (re->magic_number != MAGIC_NUMBER)
  {
  re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
  if (re == NULL) return PCRE_ERROR_BADMAGIC;
  if (study != NULL) study = &internal_study;
  }

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

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

  case PCRE_INFO_FIRSTBYTE:
  *((int *)where) =
    ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
    ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
  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 uschar **)where) =
    (study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
      ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
  break;

  case PCRE_INFO_LASTLITERAL:
  *((int *)where) =
    ((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
  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 uschar **)where) = (const uschar *)re + re->name_table_offset;
  break;

  case PCRE_INFO_DEFAULT_TABLES:
  *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
  break;

  default: return PCRE_ERROR_BADOPTION;
  }

return 0;
}

/* End of pcre_fullinfo.c */
Revision:	59
Committed:	Mon Oct 3 15:11:57 2005 UTC (20 years, 10 months ago) by adx
Content type:	text/x-csrc
File size:	4985 byte(s)
Log Message:	- move non-irc related sources to /libio - todo: make it independent of the rest of code
#	User	Rev	Content
1	adx	59	/* $Id: pcre_fullinfo.c 33 2005-10-02 20:50:00Z knight $ */
2
3			/*************************************************
4			* Perl-Compatible Regular Expressions *
5			*************************************************/
6
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.
9
10			Written by Philip Hazel
11			Copyright (c) 1997-2005 University of Cambridge
12
13			-----------------------------------------------------------------------------
14			Redistribution and use in source and binary forms, with or without
15			modification, are permitted provided that the following conditions are met:
16
17			* Redistributions of source code must retain the above copyright notice,
18			this list of conditions and the following disclaimer.
19
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.
23
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.
27
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			-----------------------------------------------------------------------------
40			*/
41
42
43			/* This module contains the external function pcre_fullinfo(), which returns
44			information about a compiled pattern. */
45
46
47			#include "pcre_internal.h"
48
49
50			/*************************************************
51			* Return info about compiled pattern *
52			*************************************************/
53
54			/* This is a newer "info" function which has an extensible interface so
55			that additional items can be added compatibly.
56
57			Arguments:
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
62
63			Returns: 0 if data returned, negative on error
64			*/
65
66			EXPORT int
67			pcre_fullinfo(const pcre argument_re, const pcre_extra extra_data, int what,
68			void *where)
69			{
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;
74
75			if (re == NULL \|\| where == NULL) return PCRE_ERROR_NULL;
76
77			if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
78			study = (const pcre_study_data *)extra_data->study_data;
79
80			if (re->magic_number != MAGIC_NUMBER)
81			{
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;
85			}
86
87			switch (what)
88			{
89			case PCRE_INFO_OPTIONS:
90			((unsigned long int )where) = re->options & PUBLIC_OPTIONS;
91			break;
92
93			case PCRE_INFO_SIZE:
94			((size_t )where) = re->size;
95			break;
96
97			case PCRE_INFO_STUDYSIZE:
98			((size_t )where) = (study == NULL)? 0 : study->size;
99			break;
100
101			case PCRE_INFO_CAPTURECOUNT:
102			((int )where) = re->top_bracket;
103			break;
104
105			case PCRE_INFO_BACKREFMAX:
106			((int )where) = re->top_backref;
107			break;
108
109			case PCRE_INFO_FIRSTBYTE:
110			((int )where) =
111			((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
112			((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
113			break;
114
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). */
117
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;
122			break;
123
124			case PCRE_INFO_LASTLITERAL:
125			((int )where) =
126			((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
127			break;
128
129			case PCRE_INFO_NAMEENTRYSIZE:
130			((int )where) = re->name_entry_size;
131			break;
132
133			case PCRE_INFO_NAMECOUNT:
134			((int )where) = re->name_count;
135			break;
136
137			case PCRE_INFO_NAMETABLE:
138			((const uschar )where) = (const uschar )re + re->name_table_offset;
139			break;
140
141			case PCRE_INFO_DEFAULT_TABLES:
142			((const uschar )where) = (const uschar )(_pcre_default_tables);
143			break;
144
145			default: return PCRE_ERROR_BADOPTION;
146			}
147
148			return 0;
149			}
150
151			/* End of pcre_fullinfo.c */