3 * $Id: pcre.c,v 1.2 2004/04/08 01:36:19 mdw Exp $
5 * Matches Perl-compatible regular expressions
7 * (c) 2002 Mark Wooding
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Anag: a simple wordgame helper.
14 * Anag is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * Anag is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with Anag; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Header files ------------------------------------------------------*/
42 /*----- Data structures ---------------------------------------------------*/
44 typedef struct node_pcre {
53 /*----- Main code ---------------------------------------------------------*/
55 /* --- Node matcher --- */
57 static int n_pcre(node *nn, const char *p, size_t sz)
59 node_pcre *n = (node_pcre *)nn;
62 e = pcre_exec(n->rx, n->rx_study, p, sz, 0, 0, n->ovec, n->ovecsz);
65 if (e == PCRE_ERROR_NOMATCH)
67 die("unexpected PCRE error code %d", e);
71 /* --- Node creation --- */
73 node *pcrenode(const char *const *av)
75 node_pcre *n = xmalloc(sizeof(*n));
81 if ((n->rx = pcre_compile(av[0], PCRE_CASELESS, &e, &eo, 0)) == 0)
82 die("bad regular expression `%s': %s", av[0], e);
83 n->rx_study = pcre_study(n->rx, 0, &e);
85 die("error studying pattern `%s': %s", av[0], e);
86 pcre_fullinfo(n->rx, n->rx_study, PCRE_INFO_BACKREFMAX, &c);
88 n->ovec = xmalloc(n->ovecsz * sizeof(*n->ovec));
92 /*----- That's all, folks -------------------------------------------------*/