/*     $OpenBSD: genget.c,v 1.2 2003/06/02 19:38:25 millert Exp $  *//*- * 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. 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/* from: static char sccsid[] = "@(#)genget.c  8.2 (Berkeley) 5/30/95"; *//* from: static char *rcsid = "$NetBSD: genget.c,v 1.5 1996/02/24 01:15:21 jtk Exp $"; */static char *rcsid = "$OpenBSD: genget.c,v 1.2 2003/06/02 19:38:25 millert Exp $";#endif /* not lint *//* $KTH: genget.c,v 1.6 1997/05/04 09:01:34 assar Exp $ */#include <ctype.h>#include "misc-proto.h"#define	LOWER(x) (isupper((int)x) ? tolower((int)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. */intisprefix(char *s1, char *s2){    char *os1;    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(char *name, char **table, int stlen)     /* name to match */     /* name entry in table */	   	      {    char **c, **found;    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() */intAmbiguous(void *s){    return((char **)s == &ambiguous);}