2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)genget.c 8.2 (Berkeley) 5/30/95
30 * $FreeBSD: src/crypto/telnet/libtelnet/genget.c,v 1.2.8.2 2002/04/13 10:59:07 markm Exp $
33 #include <sys/_null.h>
36 #include "misc-proto.h"
38 #define LOWER(x) (isupper(x) ? tolower(x) : (x))
40 * The prefix function returns 0 if *s1 is not a prefix
41 * of *s2. If *s1 exactly matches *s2, the negative of
42 * the length is returned. If *s1 is a prefix of *s2,
43 * the length of *s1 is returned.
46 isprefix(char *s1, const char *s2)
56 while (LOWER(c1) == LOWER(c2)) {
62 return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1)));
65 static char *ambiguous; /* special return value for command routines */
68 genget(char *name, char **table, int stlen)
77 for (c = table; *c != NULL; c = (char **)((char *)c + stlen)) {
78 if ((n = isprefix(name, *c)) == 0)
80 if (n < 0) /* exact match */
90 * Function call version of Ambiguous()
95 return(s == &ambiguous);