157416Smarkm/*- 257416Smarkm * Copyright (c) 1991, 1993 357416Smarkm * The Regents of the University of California. All rights reserved. 457416Smarkm * 557416Smarkm * Redistribution and use in source and binary forms, with or without 657416Smarkm * modification, are permitted provided that the following conditions 757416Smarkm * are met: 857416Smarkm * 1. Redistributions of source code must retain the above copyright 957416Smarkm * notice, this list of conditions and the following disclaimer. 1057416Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1157416Smarkm * notice, this list of conditions and the following disclaimer in the 1257416Smarkm * documentation and/or other materials provided with the distribution. 1357416Smarkm * 3. All advertising materials mentioning features or use of this software 1457416Smarkm * must display the following acknowledgement: 1557416Smarkm * This product includes software developed by the University of 1657416Smarkm * California, Berkeley and its contributors. 1757416Smarkm * 4. Neither the name of the University nor the names of its contributors 1857416Smarkm * may be used to endorse or promote products derived from this software 1957416Smarkm * without specific prior written permission. 2057416Smarkm * 2157416Smarkm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2257416Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2357416Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2457416Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2557416Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2657416Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2757416Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2857416Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2957416Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3057416Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3157416Smarkm * SUCH DAMAGE. 3257416Smarkm */ 3357416Smarkm 3457416Smarkm#include <config.h> 35233294Sstas#ifdef HAVE_SYS_TYPES_H 36233294Sstas#include <sys/types.h> 37233294Sstas#endif 38233294Sstas#include <ctype.h> 3957416Smarkm#include "misc-proto.h" 4057416Smarkm 41233294SstasRCSID("$Id$"); 4257416Smarkm 4357416Smarkm 4457416Smarkm#define LOWER(x) (isupper(x) ? tolower(x) : (x)) 4557416Smarkm/* 4657416Smarkm * The prefix function returns 0 if *s1 is not a prefix 4757416Smarkm * of *s2. If *s1 exactly matches *s2, the negative of 4857416Smarkm * the length is returned. If *s1 is a prefix of *s2, 4957416Smarkm * the length of *s1 is returned. 5057416Smarkm */ 5157416Smarkm 5257416Smarkmint 5357416Smarkmisprefix(char *s1, char *s2) 5457416Smarkm{ 5557416Smarkm char *os1; 5657416Smarkm char c1, c2; 5757416Smarkm 5857416Smarkm if (*s1 == '\0') 5957416Smarkm return(-1); 6057416Smarkm os1 = s1; 6157416Smarkm c1 = *s1; 6257416Smarkm c2 = *s2; 6390926Snectar while (tolower((unsigned char)c1) == tolower((unsigned char)c2)) { 6457416Smarkm if (c1 == '\0') 6557416Smarkm break; 6657416Smarkm c1 = *++s1; 6757416Smarkm c2 = *++s2; 6857416Smarkm } 6957416Smarkm return(*s1 ? 0 : (*s2 ? (s1 - os1) : (os1 - s1))); 7057416Smarkm} 7157416Smarkm 7257416Smarkmstatic char *ambiguous; /* special return value for command routines */ 7357416Smarkm 7457416Smarkmchar ** 7557416Smarkmgenget(char *name, char **table, int stlen) 7657416Smarkm /* name to match */ 7757416Smarkm /* name entry in table */ 78233294Sstas 7957416Smarkm{ 8057416Smarkm char **c, **found; 8157416Smarkm int n; 8257416Smarkm 8357416Smarkm if (name == 0) 8457416Smarkm return 0; 8557416Smarkm 8657416Smarkm found = 0; 8757416Smarkm for (c = table; *c != 0; c = (char **)((char *)c + stlen)) { 8857416Smarkm if ((n = isprefix(name, *c)) == 0) 8957416Smarkm continue; 9057416Smarkm if (n < 0) /* exact match */ 9157416Smarkm return(c); 9257416Smarkm if (found) 9357416Smarkm return(&ambiguous); 9457416Smarkm found = c; 9557416Smarkm } 9657416Smarkm return(found); 9757416Smarkm} 9857416Smarkm 9957416Smarkm/* 10057416Smarkm * Function call version of Ambiguous() 10157416Smarkm */ 10257416Smarkmint 10357416SmarkmAmbiguous(void *s) 10457416Smarkm{ 10557416Smarkm return((char **)s == &ambiguous); 10657416Smarkm} 107