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

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Revision 932 - (hide annotations) (download)
Fri Feb 24 18:54:43 2012 UTC (2 years, 5 months ago) by ph10
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File size: 6669 byte(s)
Add support for PCRE_INFO_MAXLOOKBEHIND.

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 836 Copyright (c) 1997-2012 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 836 #ifdef COMPILE_PCRE8
69 ph10 359 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
70 zherczeg 852 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
71     int what, void *where)
72 ph10 836 #else
73     PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
74 zherczeg 852 pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
75     int what, void *where)
76 ph10 836 #endif
77 nigel 77 {
78 zherczeg 852 const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
79 nigel 77 const pcre_study_data *study = NULL;
80    
81     if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
82    
83     if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
84     study = (const pcre_study_data *)extra_data->study_data;
85    
86 ph10 836 /* Check that the first field in the block is the magic number. If it is not,
87     return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
88     REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
89     means that the pattern is likely compiled with different endianness. */
90    
91 nigel 77 if (re->magic_number != MAGIC_NUMBER)
92 ph10 836 return re->magic_number == REVERSED_MAGIC_NUMBER?
93     PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
94 ph10 842
95 ph10 836 /* Check that this pattern was compiled in the correct bit mode */
96 ph10 842
97 ph10 836 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
98 nigel 77
99     switch (what)
100     {
101     case PCRE_INFO_OPTIONS:
102 ph10 389 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
103 nigel 77 break;
104    
105     case PCRE_INFO_SIZE:
106     *((size_t *)where) = re->size;
107     break;
108    
109     case PCRE_INFO_STUDYSIZE:
110     *((size_t *)where) = (study == NULL)? 0 : study->size;
111     break;
112 ph10 788
113 ph10 836 case PCRE_INFO_JITSIZE:
114     #ifdef SUPPORT_JIT
115     *((size_t *)where) =
116     (extra_data != NULL &&
117     (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
118     extra_data->executable_jit != NULL)?
119     PRIV(jit_get_size)(extra_data->executable_jit) : 0;
120     #else
121     *((size_t *)where) = 0;
122     #endif
123     break;
124    
125 nigel 77 case PCRE_INFO_CAPTURECOUNT:
126     *((int *)where) = re->top_bracket;
127     break;
128    
129     case PCRE_INFO_BACKREFMAX:
130     *((int *)where) = re->top_backref;
131     break;
132    
133     case PCRE_INFO_FIRSTBYTE:
134     *((int *)where) =
135 ph10 836 ((re->flags & PCRE_FIRSTSET) != 0)? re->first_char :
136 ph10 230 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
137 nigel 77 break;
138    
139     /* Make sure we pass back the pointer to the bit vector in the external
140     block, not the internal copy (with flipped integer fields). */
141    
142     case PCRE_INFO_FIRSTTABLE:
143 ph10 836 *((const pcre_uint8 **)where) =
144 ph10 455 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
145 nigel 77 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
146     break;
147 ph10 461
148 ph10 455 case PCRE_INFO_MINLENGTH:
149     *((int *)where) =
150     (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
151 ph10 904 (int)(study->minlength) : -1;
152 ph10 461 break;
153 nigel 77
154 ph10 666 case PCRE_INFO_JIT:
155 ph10 691 *((int *)where) = extra_data != NULL &&
156 ph10 666 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
157     extra_data->executable_jit != NULL;
158     break;
159    
160 nigel 77 case PCRE_INFO_LASTLITERAL:
161     *((int *)where) =
162 ph10 836 ((re->flags & PCRE_REQCHSET) != 0)? re->req_char : -1;
163 nigel 77 break;
164    
165     case PCRE_INFO_NAMEENTRYSIZE:
166     *((int *)where) = re->name_entry_size;
167     break;
168    
169     case PCRE_INFO_NAMECOUNT:
170     *((int *)where) = re->name_count;
171     break;
172    
173     case PCRE_INFO_NAMETABLE:
174 ph10 836 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
175 nigel 77 break;
176    
177     case PCRE_INFO_DEFAULT_TABLES:
178 ph10 836 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
179 nigel 77 break;
180 ph10 172
181 ph10 426 /* From release 8.00 this will always return TRUE because NOPARTIAL is
182     no longer ever set (the restrictions have been removed). */
183 ph10 461
184 ph10 169 case PCRE_INFO_OKPARTIAL:
185 ph10 230 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
186 ph10 169 break;
187 ph10 172
188 ph10 169 case PCRE_INFO_JCHANGED:
189 ph10 230 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
190 ph10 172 break;
191 nigel 77
192 ph10 226 case PCRE_INFO_HASCRORLF:
193 ph10 230 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
194 ph10 226 break;
195 ph10 932
196     case PCRE_INFO_MAXLOOKBEHIND:
197     *((int *)where) = re->max_lookbehind;
198     break;
199 ph10 226
200 nigel 77 default: return PCRE_ERROR_BADOPTION;
201     }
202    
203     return 0;
204     }
205    
206     /* End of pcre_fullinfo.c */

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