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6bf342e1 | 1 | /* $Cambridge: exim/src/src/pcre/pcre_fullinfo.c,v 1.4 2007/01/23 15:08:45 ph10 Exp $ */ |
8ac170f3 PH |
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 | |
aa41d2de | 11 | Copyright (c) 1997-2006 University of Cambridge |
8ac170f3 PH |
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 | ||
aa41d2de | 66 | PCRE_DATA_SCOPE int |
8ac170f3 PH |
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 */ |