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 Original API code Copyright (c) 1997-2012 University of Cambridge
10 New API code Copyright (c) 2016-2019 University of Cambridge
11
12 -----------------------------------------------------------------------------
13 Redistribution and use in source and binary forms, with or without
14 modification, are permitted provided that the following conditions are met:
15
16 * Redistributions of source code must retain the above copyright notice,
17 this list of conditions and the following disclaimer.
18
19 * Redistributions in binary form must reproduce the above copyright
20 notice, this list of conditions and the following disclaimer in the
21 documentation and/or other materials provided with the distribution.
22
23 * Neither the name of the University of Cambridge nor the names of its
24 contributors may be used to endorse or promote products derived from
25 this software without specific prior written permission.
26
27 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
28 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
31 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 POSSIBILITY OF SUCH DAMAGE.
38 -----------------------------------------------------------------------------
39 */
40
41
42 #ifdef HAVE_CONFIG_H
43 #include "config.h"
44 #endif
45
46 #include "pcre2_internal.h"
47
48
49
50 /*************************************************
51 * Create a match data block given ovector size *
52 *************************************************/
53
54 /* A minimum of 1 is imposed on the number of ovector pairs. */
55
56 PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
pcre2_match_data_create(uint32_t oveccount,pcre2_general_context * gcontext)57 pcre2_match_data_create(uint32_t oveccount, pcre2_general_context *gcontext)
58 {
59 pcre2_match_data *yield;
60 if (oveccount < 1) oveccount = 1;
61 yield = PRIV(memctl_malloc)(
62 offsetof(pcre2_match_data, ovector) + 2*oveccount*sizeof(PCRE2_SIZE),
63 (pcre2_memctl *)gcontext);
64 if (yield == NULL) return NULL;
65 yield->oveccount = oveccount;
66 yield->flags = 0;
67 return yield;
68 }
69
70
71
72 /*************************************************
73 * Create a match data block using pattern data *
74 *************************************************/
75
76 /* If no context is supplied, use the memory allocator from the code. */
77
78 PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
pcre2_match_data_create_from_pattern(const pcre2_code * code,pcre2_general_context * gcontext)79 pcre2_match_data_create_from_pattern(const pcre2_code *code,
80 pcre2_general_context *gcontext)
81 {
82 if (gcontext == NULL) gcontext = (pcre2_general_context *)code;
83 return pcre2_match_data_create(((pcre2_real_code *)code)->top_bracket + 1,
84 gcontext);
85 }
86
87
88
89 /*************************************************
90 * Free a match data block *
91 *************************************************/
92
93 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
pcre2_match_data_free(pcre2_match_data * match_data)94 pcre2_match_data_free(pcre2_match_data *match_data)
95 {
96 if (match_data != NULL)
97 {
98 if ((match_data->flags & PCRE2_MD_COPIED_SUBJECT) != 0)
99 match_data->memctl.free((void *)match_data->subject,
100 match_data->memctl.memory_data);
101 match_data->memctl.free(match_data, match_data->memctl.memory_data);
102 }
103 }
104
105
106
107 /*************************************************
108 * Get last mark in match *
109 *************************************************/
110
111 PCRE2_EXP_DEFN PCRE2_SPTR PCRE2_CALL_CONVENTION
pcre2_get_mark(pcre2_match_data * match_data)112 pcre2_get_mark(pcre2_match_data *match_data)
113 {
114 return match_data->mark;
115 }
116
117
118
119 /*************************************************
120 * Get pointer to ovector *
121 *************************************************/
122
123 PCRE2_EXP_DEFN PCRE2_SIZE * PCRE2_CALL_CONVENTION
pcre2_get_ovector_pointer(pcre2_match_data * match_data)124 pcre2_get_ovector_pointer(pcre2_match_data *match_data)
125 {
126 return match_data->ovector;
127 }
128
129
130
131 /*************************************************
132 * Get number of ovector slots *
133 *************************************************/
134
135 PCRE2_EXP_DEFN uint32_t PCRE2_CALL_CONVENTION
pcre2_get_ovector_count(pcre2_match_data * match_data)136 pcre2_get_ovector_count(pcre2_match_data *match_data)
137 {
138 return match_data->oveccount;
139 }
140
141
142
143 /*************************************************
144 * Get starting code unit in match *
145 *************************************************/
146
147 PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
pcre2_get_startchar(pcre2_match_data * match_data)148 pcre2_get_startchar(pcre2_match_data *match_data)
149 {
150 return match_data->startchar;
151 }
152
153
154
155 /*************************************************
156 * Get size of match data block *
157 *************************************************/
158
159 PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
pcre2_get_match_data_size(pcre2_match_data * match_data)160 pcre2_get_match_data_size(pcre2_match_data *match_data)
161 {
162 return offsetof(pcre2_match_data, ovector) +
163 2 * (match_data->oveccount) * sizeof(PCRE2_SIZE);
164 }
165
166 /* End of pcre2_match_data.c */
167