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) 2016-2022 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. A maximum is also
55 imposed because the oveccount field in a match data block is uintt6_t. */
56
57 PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
pcre2_match_data_create(uint32_t oveccount,pcre2_general_context * gcontext)58 pcre2_match_data_create(uint32_t oveccount, pcre2_general_context *gcontext)
59 {
60 pcre2_match_data *yield;
61 if (oveccount < 1) oveccount = 1;
62 if (oveccount > UINT16_MAX) oveccount = UINT16_MAX;
63 yield = PRIV(memctl_malloc)(
64 offsetof(pcre2_match_data, ovector) + 2*oveccount*sizeof(PCRE2_SIZE),
65 (pcre2_memctl *)gcontext);
66 if (yield == NULL) return NULL;
67 yield->oveccount = oveccount;
68 yield->flags = 0;
69 yield->heapframes = NULL;
70 yield->heapframes_size = 0;
71 return yield;
72 }
73
74
75
76 /*************************************************
77 * Create a match data block using pattern data *
78 *************************************************/
79
80 /* If no context is supplied, use the memory allocator from the code. */
81
82 PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
pcre2_match_data_create_from_pattern(const pcre2_code * code,pcre2_general_context * gcontext)83 pcre2_match_data_create_from_pattern(const pcre2_code *code,
84 pcre2_general_context *gcontext)
85 {
86 if (gcontext == NULL) gcontext = (pcre2_general_context *)code;
87 return pcre2_match_data_create(((pcre2_real_code *)code)->top_bracket + 1,
88 gcontext);
89 }
90
91
92
93 /*************************************************
94 * Free a match data block *
95 *************************************************/
96
97 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
pcre2_match_data_free(pcre2_match_data * match_data)98 pcre2_match_data_free(pcre2_match_data *match_data)
99 {
100 if (match_data != NULL)
101 {
102 if (match_data->heapframes != NULL)
103 match_data->memctl.free(match_data->heapframes,
104 match_data->memctl.memory_data);
105 if ((match_data->flags & PCRE2_MD_COPIED_SUBJECT) != 0)
106 match_data->memctl.free((void *)match_data->subject,
107 match_data->memctl.memory_data);
108 match_data->memctl.free(match_data, match_data->memctl.memory_data);
109 }
110 }
111
112
113
114 /*************************************************
115 * Get last mark in match *
116 *************************************************/
117
118 PCRE2_EXP_DEFN PCRE2_SPTR PCRE2_CALL_CONVENTION
pcre2_get_mark(pcre2_match_data * match_data)119 pcre2_get_mark(pcre2_match_data *match_data)
120 {
121 return match_data->mark;
122 }
123
124
125
126 /*************************************************
127 * Get pointer to ovector *
128 *************************************************/
129
130 PCRE2_EXP_DEFN PCRE2_SIZE * PCRE2_CALL_CONVENTION
pcre2_get_ovector_pointer(pcre2_match_data * match_data)131 pcre2_get_ovector_pointer(pcre2_match_data *match_data)
132 {
133 return match_data->ovector;
134 }
135
136
137
138 /*************************************************
139 * Get number of ovector slots *
140 *************************************************/
141
142 PCRE2_EXP_DEFN uint32_t PCRE2_CALL_CONVENTION
pcre2_get_ovector_count(pcre2_match_data * match_data)143 pcre2_get_ovector_count(pcre2_match_data *match_data)
144 {
145 return match_data->oveccount;
146 }
147
148
149
150 /*************************************************
151 * Get starting code unit in match *
152 *************************************************/
153
154 PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
pcre2_get_startchar(pcre2_match_data * match_data)155 pcre2_get_startchar(pcre2_match_data *match_data)
156 {
157 return match_data->startchar;
158 }
159
160
161
162 /*************************************************
163 * Get size of match data block *
164 *************************************************/
165
166 PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
pcre2_get_match_data_size(pcre2_match_data * match_data)167 pcre2_get_match_data_size(pcre2_match_data *match_data)
168 {
169 return offsetof(pcre2_match_data, ovector) +
170 2 * (match_data->oveccount) * sizeof(PCRE2_SIZE);
171 }
172
173 /* End of pcre2_match_data.c */
174
