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 ------------------------------------------------------*/
40 /*----- Data structures ---------------------------------------------------*/
42 typedef struct node_pcre {
51 /*----- Main code ---------------------------------------------------------*/
53 /* --- Node matcher --- */
55 static int n_pcre(node *nn, const char *p, size_t sz)
57 node_pcre *n = (node_pcre *)nn;
60 e = pcre_exec(n->rx, n->rx_study, p, sz, 0, 0, n->ovec, n->ovecsz);
63 if (e == PCRE_ERROR_NOMATCH)
65 die("unexpected PCRE error code %d", e);
69 /* --- Node creation --- */
71 node *pcrenode(const char *const *av)
73 node_pcre *n = xmalloc(sizeof(*n));
79 if ((n->rx = pcre_compile(av[0], PCRE_CASELESS, &e, &eo, 0)) == 0)
80 die("bad regular expression `%s': %s", av[0], e);
81 n->rx_study = pcre_study(n->rx, 0, &e);
83 die("error studying pattern `%s': %s", av[0], e);
84 pcre_fullinfo(n->rx, n->rx_study, PCRE_INFO_BACKREFMAX, &c);
86 n->ovec = xmalloc(n->ovecsz * sizeof(*n->ovec));
90 /*----- That's all, folks -------------------------------------------------*/