Initial revision

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@171 ec53bebd-3082-4978-b11e-865c3cabbd6b

appl/telnet/libtelnet/genget.c

@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)genget.c	8.2 (Berkeley) 5/30/95";
+#endif /* not lint */
+
+
+#include <ctype.h>
+
+#define	LOWER(x) (isupper(x) ? tolower(x) : (x))
+/*
+ * The prefix function returns 0 if *s1 is not a prefix
+ * of *s2.  If *s1 exactly matches *s2, the negative of
+ * the length is returned.  If *s1 is a prefix of *s2,
+ * the length of *s1 is returned.
+ */
+	int
+isprefix(s1, s2)
+	register char *s1, *s2;
+{
+	register int n = 0;
+	char *os1;
+	register char c1, c2;
+
+	if (*s1 == '\0')
+		return(-1);
+	os1 = s1;
+	c1 = *s1;
+	c2 = *s2;
+	while (LOWER(c1) == LOWER(c2)) {
+		if (c1 == '\0')
+			break;
+		c1 = *++s1;
+		c2 = *++s2;
+	}
+	return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1)));
+}
+
+static char *ambiguous;		/* special return value for command routines */
+
+	char **
+genget(name, table, stlen)
+	char	*name;		/* name to match */
+	char	**table;	/* name entry in table */
+	int	stlen;
+{
+	register char **c, **found;
+	register int n;
+
+	if (name == 0)
+	    return 0;
+
+	found = 0;
+	for (c = table; *c != 0; c = (char **)((char *)c + stlen)) {
+		if ((n = isprefix(name, *c)) == 0)
+			continue;
+		if (n < 0)		/* exact match */
+			return(c);
+		if (found)
+			return(&ambiguous);
+		found = c;
+	}
+	return(found);
+}
+
+/*
+ * Function call version of Ambiguous()
+ */
+	int
+Ambiguous(s)
+	char *s;
+{
+	return((char **)s == &ambiguous);
+}