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

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Revision 691 - (hide annotations) (download)
Sun Sep 11 14:31:21 2011 UTC (3 years ago) by ph10
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File size: 5772 byte(s)
Final source and document tidies for 8.20-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 666 Copyright (c) 1997-2011 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 ph10 666 case PCRE_INFO_JIT:
133 ph10 691 *((int *)where) = extra_data != NULL &&
134 ph10 666 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
135     extra_data->executable_jit != NULL;
136     break;
137    
138 nigel 77 case PCRE_INFO_LASTLITERAL:
139     *((int *)where) =
140 ph10 230 ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
141 nigel 77 break;
142    
143     case PCRE_INFO_NAMEENTRYSIZE:
144     *((int *)where) = re->name_entry_size;
145     break;
146    
147     case PCRE_INFO_NAMECOUNT:
148     *((int *)where) = re->name_count;
149     break;
150    
151     case PCRE_INFO_NAMETABLE:
152     *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
153     break;
154    
155     case PCRE_INFO_DEFAULT_TABLES:
156     *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
157     break;
158 ph10 172
159 ph10 426 /* From release 8.00 this will always return TRUE because NOPARTIAL is
160     no longer ever set (the restrictions have been removed). */
161 ph10 461
162 ph10 169 case PCRE_INFO_OKPARTIAL:
163 ph10 230 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
164 ph10 169 break;
165 ph10 172
166 ph10 169 case PCRE_INFO_JCHANGED:
167 ph10 230 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
168 ph10 172 break;
169 nigel 77
170 ph10 226 case PCRE_INFO_HASCRORLF:
171 ph10 230 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
172 ph10 226 break;
173    
174 nigel 77 default: return PCRE_ERROR_BADOPTION;
175     }
176    
177     return 0;
178     }
179    
180     /* End of pcre_fullinfo.c */

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