--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: qdparse.c,v 1.1 2004/03/27 17:54:12 mdw Exp $
+ *
+ * Quick-and-dirty parser
+ *
+ * (c) 2004 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: qdparse.c,v $
+ * Revision 1.1 2004/03/27 17:54:12 mdw
+ * Standard curves and curve checking.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <ctype.h>
+#include <string.h>
+
+#include "qdparse.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @qd_skipspc@ --- *
+ *
+ * Arguments: @qd_parse *qd@ = context
+ *
+ * Returns: ---
+ *
+ * Use: Skips spaces in the string. No errors.
+ */
+
+void qd_skipspc(qd_parse *qd)
+{
+ while (isspace((unsigned char)*qd->p))
+ qd->p++;
+}
+
+/* --- @qd_delim@ --- *
+ *
+ * Arguments: @qd_parse *qd@ = context
+ * @int ch@ = character to compare with
+ *
+ * Returns: Nonzero if it was, zero if it wasn't.
+ *
+ * Use: Checks the next (non-whitespace) character is what we
+ * expect. If it is, the character is eaten; otherwise it's no
+ * big deal.
+ */
+
+int qd_delim(qd_parse *qd, int ch)
+{
+ qd_skipspc(qd);
+ if (*qd->p != ch)
+ return (0);
+ qd->p++;
+ return (1);
+}
+
+/* --- @qd_enum@ --- *
+ *
+ * Arguments: @qd_parse *qd@ = context
+ * @const char *e@ = list of enum strings, space separated
+ *
+ * Returns: Index of the string matched, or @-1@.
+ *
+ * Use: Matches a keyword.
+ */
+
+int qd_enum(qd_parse *qd, const char *e)
+{
+ size_t n;
+ int i = 0;
+
+ qd_skipspc(qd);
+ for (;;) {
+ e += strspn(e, ", ");
+ if (!*e) break;
+ n = strcspn(e, ", ");
+ if (strncmp(qd->p, e, n) == 0 && !isalnum((unsigned char)qd->p[n])) {
+ qd->p += n;
+ return (i);
+ }
+ i++; e += n;
+ }
+ qd->e = "unrecognized keyword";
+ return (-1);
+}
+
+/* --- @qd_getmp@ --- *
+ *
+ * Arguments: @qd_parse *qd@ = context
+ *
+ * Returns: The integer extracted, or null.
+ *
+ * Use: Parses a multiprecision integer from a string.
+ */
+
+mp *qd_getmp(qd_parse *qd)
+{
+ char *q;
+ mp *m;
+
+ qd_skipspc(qd);
+ m = mp_readstring(MP_NEW, qd->p, &q, 0);
+ if (m && !isalnum((unsigned char)*q))
+ qd->p = q;
+ else {
+ mp_drop(m);
+ qd->e = "bad number";
+ }
+ return (m);
+}
+
+/* --- @qd_eofp@ --- *
+ *
+ * Arguments: @qd_parse *qd@ = context
+ *
+ * Returns: Nonzero if at EOF, zero otherwise.
+ */
+
+int qd_eofp(qd_parse *qd)
+{
+ qd_skipspc(qd);
+ return (!*qd->p);
+}
+
+/*----- That's all, folks -------------------------------------------------*/