X-Git-Url: https://git.distorted.org.uk/~mdw/anag/blobdiff_plain/de6b7015b91d370f83e4189c05393eefceab0678..d9af4a2b674e5ab91df0f9af236283b617bb81c7:/pcre.c

diff --git a/pcre.c b/pcre.c
new file mode 100644
index 0000000..89ae8b4
--- /dev/null
+++ b/pcre.c
@@ -0,0 +1,102 @@
+/* -*-c-*-
+ *
+ * $Id: pcre.c,v 1.1 2003/11/29 23:38:37 mdw Exp $
+ *
+ * Matches Perl-compatible regular expressions
+ *
+ * (c) 2002 Mark Wooding
+ */
+
+/*----- Licensing notice --------------------------------------------------* 
+ *
+ * This file is part of Anag: a simple wordgame helper.
+ *
+ * Anag is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * Anag is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Anag; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------* 
+ *
+ * $Log: pcre.c,v $
+ * Revision 1.1  2003/11/29 23:38:37  mdw
+ * Debianization.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#ifndef HAVE_PCRE
+  extern int dummy;
+#else
+
+#include "anag.h"
+#include <pcre.h>
+
+/*----- Data structures ---------------------------------------------------*/
+
+typedef struct node_pcre {
+  node n;
+  const char *s;
+  pcre *rx;
+  pcre_extra *rx_study;
+  int *ovec;
+  int ovecsz;
+} node_pcre;
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- Node matcher --- */
+
+static int n_pcre(node *nn, const char *p, size_t sz)
+{
+  node_pcre *n = (node_pcre *)nn;
+  int e;
+
+  e = pcre_exec(n->rx, n->rx_study, p, sz, 0, 0, n->ovec, n->ovecsz);
+  if (e >= 0)
+    return (1);
+  if (e == PCRE_ERROR_NOMATCH)
+    return (0);
+  die("unexpected PCRE error code %d", e);
+  return (-1);
+}
+
+/* --- Node creation --- */
+
+node *pcrenode(const char *const *av)
+{
+  node_pcre *n = xmalloc(sizeof(*n));
+  const char *e;
+  int eo;
+  int c;
+
+  n->n.func = n_pcre;
+  if ((n->rx = pcre_compile(av[0], PCRE_CASELESS, &e, &eo, 0)) == 0)
+    die("bad regular expression `%s': %s", av[0], e);
+  n->rx_study = pcre_study(n->rx, 0, &e);
+  if (e)
+    die("error studying pattern `%s': %s", av[0], e);
+  pcre_fullinfo(n->rx, n->rx_study, PCRE_INFO_BACKREFMAX, &c);
+  n->ovecsz = c * 2;
+  n->ovec = xmalloc(n->ovecsz * sizeof(*n->ovec));
+  return (&n->n);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#endif