3 * Matches Perl-compatible regular expressions
5 * (c) 2002 Mark Wooding
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Anag: a simple wordgame helper.
12 * Anag is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * Anag is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with Anag; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
32 # define PCRE2_CODE_UNIT_WIDTH 8
40 /*----- Data structures ---------------------------------------------------*/
42 typedef struct node_pcre {
57 /*----- Main code ---------------------------------------------------------*/
59 /* --- Node matcher --- */
61 static int n_pcre(node *nn, const char *p, size_t sz)
63 node_pcre *n = (node_pcre *)nn;
73 rc = pcre2_match(n->rx, (PCRE2_SPTR)p, sz, 0, 0, n->m, 0);
74 if (rc >= 0) return (1);
76 case PCRE2_ERROR_NOMATCH: return (0);
78 rc = pcre2_get_error_message(rc, (PCRE2_UCHAR *)buf, sizeof(buf));
79 assert(!rc); die("pcre2 matching failed': %s", buf);
83 e = pcre_exec(n->rx, n->rx_study, p, sz, 0, 0, n->ovec, n->ovecsz);
84 if (e >= 0) return (1);
85 if (e == PCRE_ERROR_NOMATCH) return (0);
86 die("unexpected PCRE error code %d", e);
90 /* --- Node creation --- */
92 node *pcrenode(const char *const *av)
94 node_pcre *n = xmalloc(sizeof(*n));
110 n->rx = pcre2_compile((PCRE2_SPTR)av[0], strlen(av[0]), PCRE2_CASELESS,
113 err = pcre2_get_error_message(err, (PCRE2_UCHAR *)buf, sizeof(buf));
114 assert(!err); die("bad regular expression `%s': %s", av[0], buf);
116 err = pcre2_pattern_info(n->rx, PCRE2_INFO_BACKREFMAX, &c);
118 n->m = pcre2_match_data_create_from_pattern(n->rx, 0);
120 err = pcre2_get_error_message(err, (PCRE2_UCHAR *)buf, sizeof(buf));
121 assert(!err); die("failed to allocate match data: %s", buf);
123 pcre2_jit_compile(n->rx, PCRE2_JIT_COMPLETE);
126 n->rx = pcre_compile(av[0], PCRE_CASELESS, &e, &eo, 0);
127 if (!n->rx) die("bad regular expression `%s': %s", av[0], e);
128 n->rx_study = pcre_study(n->rx, 0, &e);
129 if (e) die("error studying pattern `%s': %s", av[0], e);
130 pcre_fullinfo(n->rx, n->rx_study, PCRE_INFO_CAPTURECOUNT, &c);
132 n->ovec = xmalloc(n->ovecsz*sizeof(*n->ovec));
138 /*----- That's all, folks -------------------------------------------------*/