mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/* argmatch.c -- find a match for a string in an array
|
|
Copyright (C) 1990, 1997 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; see the file COPYING.
|
|
If not, write to the Free Software Foundation,
|
|
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* Written by David MacKenzie <djm@gnu.ai.mit.edu> */
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <argmatch.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdio.h>
|
|
#if HAVE_STRING_H
|
|
# include <string.h>
|
|
#else
|
|
# include <strings.h>
|
|
#endif
|
|
|
|
/* If ARG is an unambiguous match for an element of the
|
|
null-terminated array OPTLIST, return the index in OPTLIST
|
|
of the matched element, else -1 if it does not match any element
|
|
or -2 if it is ambiguous (is a prefix of more than one element). */
|
|
|
|
int
|
|
argmatch (arg, optlist)
|
|
const char *arg;
|
|
const char *const *optlist;
|
|
{
|
|
int i; /* Temporary index in OPTLIST. */
|
|
size_t arglen; /* Length of ARG. */
|
|
int matchind = -1; /* Index of first nonexact match. */
|
|
int ambiguous = 0; /* If nonzero, multiple nonexact match(es). */
|
|
|
|
arglen = strlen (arg);
|
|
|
|
/* Test all elements for either exact match or abbreviated matches. */
|
|
for (i = 0; optlist[i]; i++)
|
|
{
|
|
if (!strncmp (optlist[i], arg, arglen))
|
|
{
|
|
if (strlen (optlist[i]) == arglen)
|
|
/* Exact match found. */
|
|
return i;
|
|
else if (matchind == -1)
|
|
/* First nonexact match found. */
|
|
matchind = i;
|
|
else
|
|
/* Second nonexact match found. */
|
|
ambiguous = 1;
|
|
}
|
|
}
|
|
if (ambiguous)
|
|
return -2;
|
|
else
|
|
return matchind;
|
|
}
|
|
|
|
/* Error reporting for argmatch.
|
|
KIND is a description of the type of entity that was being matched.
|
|
VALUE is the invalid value that was given.
|
|
PROBLEM is the return value from argmatch. */
|
|
|
|
void
|
|
invalid_arg (kind, value, problem)
|
|
const char *kind;
|
|
const char *value;
|
|
int problem;
|
|
{
|
|
fprintf (stderr, "%s: ", program_name);
|
|
if (problem == -1)
|
|
fprintf (stderr, "invalid");
|
|
else /* Assume -2. */
|
|
fprintf (stderr, "ambiguous");
|
|
fprintf (stderr, " %s `%s'\n", kind, value);
|
|
}
|