pcre_fullinfo.c

Revision 905, 5.1 kB (checked in by alo, 1 year ago)
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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) 1997-2007 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	#include "local_config.h"
46	#include "pcre_internal.h"
47
48
49	/*************************************************
50	* Return info about compiled pattern *
51	*************************************************/
52
53	/* This is a newer "info" function which has an extensible interface so
54	that additional items can be added compatibly.
55
56	Arguments:
57	argument_re points to compiled code
58	extra_data points extra data, or NULL
59	what what information is required
60	where where to put the information
61
62	Returns: 0 if data returned, negative on error
63	*/
64
65	PCRE_EXP_DEFN int
66	pcre_fullinfo(const pcre argument_re, const pcre_extra extra_data, int what,
67	void *where)
68	{
69	real_pcre internal_re;
70	pcre_study_data internal_study;
71	const real_pcre re = (const real_pcre )argument_re;
72	const pcre_study_data *study = NULL;
73
74	if (re == NULL \|\| where == NULL) return PCRE_ERROR_NULL;
75
76	if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
77	study = (const pcre_study_data *)extra_data->study_data;
78
79	if (re->magic_number != MAGIC_NUMBER)
80	{
81	re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
82	if (re == NULL) return PCRE_ERROR_BADMAGIC;
83	if (study != NULL) study = &internal_study;
84	}
85
86	switch (what)
87	{
88	case PCRE_INFO_OPTIONS:
89	((unsigned long int )where) = re->options & PUBLIC_OPTIONS;
90	break;
91
92	case PCRE_INFO_SIZE:
93	((size_t )where) = re->size;
94	break;
95
96	case PCRE_INFO_STUDYSIZE:
97	((size_t )where) = (study == NULL)? 0 : study->size;
98	break;
99
100	case PCRE_INFO_CAPTURECOUNT:
101	((int )where) = re->top_bracket;
102	break;
103
104	case PCRE_INFO_BACKREFMAX:
105	((int )where) = re->top_backref;
106	break;
107
108	case PCRE_INFO_FIRSTBYTE:
109	((int )where) =
110	((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
111	((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
112	break;
113
114	/* Make sure we pass back the pointer to the bit vector in the external
115	block, not the internal copy (with flipped integer fields). */
116
117	case PCRE_INFO_FIRSTTABLE:
118	((const uschar *)where) =
119	(study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
120	((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
121	break;
122
123	case PCRE_INFO_LASTLITERAL:
124	((int )where) =
125	((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
126	break;
127
128	case PCRE_INFO_NAMEENTRYSIZE:
129	((int )where) = re->name_entry_size;
130	break;
131
132	case PCRE_INFO_NAMECOUNT:
133	((int )where) = re->name_count;
134	break;
135
136	case PCRE_INFO_NAMETABLE:
137	((const uschar )where) = (const uschar )re + re->name_table_offset;
138	break;
139
140	case PCRE_INFO_DEFAULT_TABLES:
141	((const uschar )where) = (const uschar )(_pcre_default_tables);
142	break;
143
144	case PCRE_INFO_OKPARTIAL:
145	((int )where) = (re->options & PCRE_NOPARTIAL) == 0;
146	break;
147
148	case PCRE_INFO_JCHANGED:
149	((int )where) = (re->options & PCRE_JCHANGED) != 0;
150	break;
151
152	case PCRE_INFO_HASCRORLF:
153	((int )where) = (re->options & PCRE_HASCRORLF) != 0;
154	break;
155
156	default: return PCRE_ERROR_BADOPTION;
157	}
158
159	return 0;
160	}
161
162	/* End of pcre_fullinfo.c */

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