www.pudn.com > socks5.zip > genget.c, change:1999-01-09,size:3281b

/*- 
 * 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_SCCSIDS 
static char sccsid[] = "@(#)genget.c	8.2 (Berkeley) 5/30/95"; 
#endif 
 
#include "config.h" 
 
#ifndef HAVE_GENGET 
#include  
 
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