110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static const char sccsid[] = "@(#)genget.c 8.2 (Berkeley) 5/30/95";
|
|
#else
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
|
|
#include <ctype.h>
|
|
|
|
#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(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
char *os1;
|
|
register 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(name, table, stlen)
|
|
char *name; /* name to match */
|
|
char **table; /* name entry in 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) /* exact match */
|
|
return(c);
|
|
if (found)
|
|
return(&ambiguous);
|
|
found = c;
|
|
}
|
|
return(found);
|
|
}
|
|
|
|
/*
|
|
* Function call version of Ambiguous()
|
|
*/
|
|
int
|
|
Ambiguous(s)
|
|
char **s;
|
|
{
|
|
return(s == &ambiguous);
|
|
}
|