2 * This file is part of DisOrder
3 * Copyright (C) 2017 Mark Wooding
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file lib/regexp.c
19 * @brief Regular expressions
28 static pcre2_general_context *genctx = 0;
29 static pcre2_compile_context *compctx = 0;
31 static void *rxalloc(size_t sz, void attribute((unused)) *q)
32 { return xmalloc(sz); }
33 static void rxfree(void *p, void attribute((unused)) *q)
36 void regexp_setup(void)
39 pcre2_compile_context_free(compctx);
40 pcre2_general_context_free(genctx);
42 genctx = pcre2_general_context_create(rxalloc, rxfree, 0);
43 compctx = pcre2_compile_context_create(genctx);
46 regexp *regexp_compile(const char *pat, unsigned f,
47 char *errbuf, size_t errlen, size_t *erroff_out)
53 re = pcre2_compile((PCRE2_SPTR)pat, strlen(pat), f,
54 &errcode, &erroff, compctx);
57 pcre2_get_error_message(errcode, (PCRE2_UCHAR *)errbuf, errlen);
62 int regexp_match(const regexp *re, const char *s, size_t n, unsigned f,
63 size_t *ov, size_t on)
70 m = pcre2_match_data_create(on, genctx);
71 rc = pcre2_match(re, (PCRE2_SPTR)s, n, 0, f, m, 0);
72 ovp = pcre2_get_ovector_pointer(m);
73 for(i = 0; i < on; i++) ov[i] = ovp[i];
74 pcre2_match_data_free(m);
78 void regexp_free(regexp *re)
79 { pcre2_code_free(re); }
83 void regexp_setup(void)
85 pcre_malloc = xmalloc;
89 regexp *regexp_compile(const char *pat, unsigned f,
90 char *errbuf, size_t errlen, size_t *erroff_out)
98 re = pcre_compile(pat, f, &e, &erroff, 0);
100 *erroff_out = erroff;
101 for(p = errbuf, i = errlen - 1; i && *e; i--) *p++ = *e++;
107 int regexp_match(const regexp *re, const char *s, size_t n, unsigned f,
108 size_t *ov, size_t on)
114 myov = xmalloc(on*sizeof(*myov));
115 rc = pcre_exec(re, 0, s, n, 0, f, myov, on);
116 for(i = 0; i < on; i++) ov[i] = myov[i];
121 void regexp_free(regexp *re)