/[pcre]/code/trunk/pcre_fullinfo.c
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Contents of /code/trunk/pcre_fullinfo.c

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Revision 461 - (hide annotations) (download)
Mon Oct 5 10:59:35 2009 UTC (5 years ago) by ph10
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File size: 5566 byte(s)
Tidy up, remove trailing spaces, etc. for 8.00-RC1.

1 nigel 77 /*************************************************
2     * Perl-Compatible Regular Expressions *
3     *************************************************/
4    
5 ph10 305 /* PCRE is a library of functions to support regular expressions whose syntax
6 nigel 77 and semantics are as close as possible to those of the Perl 5 language.
7    
8     Written by Philip Hazel
9 ph10 389 Copyright (c) 1997-2009 University of Cambridge
10 nigel 77
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 ph10 200 #ifdef HAVE_CONFIG_H
46 ph10 236 #include "config.h"
47 ph10 200 #endif
48 ph10 199
49 nigel 77 #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 ph10 359 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
69 nigel 77 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
70     void *where)
71     {
72     real_pcre internal_re;
73     pcre_study_data internal_study;
74     const real_pcre *re = (const real_pcre *)argument_re;
75     const pcre_study_data *study = NULL;
76    
77     if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
78    
79     if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
80     study = (const pcre_study_data *)extra_data->study_data;
81    
82     if (re->magic_number != MAGIC_NUMBER)
83     {
84     re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
85     if (re == NULL) return PCRE_ERROR_BADMAGIC;
86     if (study != NULL) study = &internal_study;
87     }
88    
89     switch (what)
90     {
91     case PCRE_INFO_OPTIONS:
92 ph10 389 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
93 nigel 77 break;
94    
95     case PCRE_INFO_SIZE:
96     *((size_t *)where) = re->size;
97     break;
98    
99     case PCRE_INFO_STUDYSIZE:
100     *((size_t *)where) = (study == NULL)? 0 : study->size;
101     break;
102    
103     case PCRE_INFO_CAPTURECOUNT:
104     *((int *)where) = re->top_bracket;
105     break;
106    
107     case PCRE_INFO_BACKREFMAX:
108     *((int *)where) = re->top_backref;
109     break;
110    
111     case PCRE_INFO_FIRSTBYTE:
112     *((int *)where) =
113 ph10 230 ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte :
114     ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
115 nigel 77 break;
116    
117     /* Make sure we pass back the pointer to the bit vector in the external
118     block, not the internal copy (with flipped integer fields). */
119    
120     case PCRE_INFO_FIRSTTABLE:
121     *((const uschar **)where) =
122 ph10 455 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
123 nigel 77 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
124     break;
125 ph10 461
126 ph10 455 case PCRE_INFO_MINLENGTH:
127     *((int *)where) =
128     (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
129     study->minlength : -1;
130 ph10 461 break;
131 nigel 77
132     case PCRE_INFO_LASTLITERAL:
133     *((int *)where) =
134 ph10 230 ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
135 nigel 77 break;
136    
137     case PCRE_INFO_NAMEENTRYSIZE:
138     *((int *)where) = re->name_entry_size;
139     break;
140    
141     case PCRE_INFO_NAMECOUNT:
142     *((int *)where) = re->name_count;
143     break;
144    
145     case PCRE_INFO_NAMETABLE:
146     *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
147     break;
148    
149     case PCRE_INFO_DEFAULT_TABLES:
150     *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
151     break;
152 ph10 172
153 ph10 426 /* From release 8.00 this will always return TRUE because NOPARTIAL is
154     no longer ever set (the restrictions have been removed). */
155 ph10 461
156 ph10 169 case PCRE_INFO_OKPARTIAL:
157 ph10 230 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
158 ph10 169 break;
159 ph10 172
160 ph10 169 case PCRE_INFO_JCHANGED:
161 ph10 230 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
162 ph10 172 break;
163 nigel 77
164 ph10 226 case PCRE_INFO_HASCRORLF:
165 ph10 230 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
166 ph10 226 break;
167    
168 nigel 77 default: return PCRE_ERROR_BADOPTION;
169     }
170    
171     return 0;
172     }
173    
174     /* End of pcre_fullinfo.c */

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