/*- * 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. */#ifdef SHOW_SCCSIDSstatic char sccsid[] = "@(#)genget.c	8.2 (Berkeley) 5/30/95";#endif#include "config.h"#ifndef HAVE_GENGET#include <ctype.h>static char *ambiguous;		/* special return value for command routines */#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(register char *s1, register char *s2) {    register char c1, c2;    char *os1;        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)));}char **genget(char *name, char ** 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) return(c);	if (found) return(&ambiguous);	found = c;    }    return(found);}/* Function call version of Ambiguous()                                      */int Ambiguous(char *s) {    return((char **)s == &ambiguous);}#endif