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compat
getopt.c
Go to the documentation of this file.
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/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* This file was copied from the following newsgroup posting:
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*
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* Newsgroups: mod.std.unix
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* Subject: public domain AT&T getopt source
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* Date: 3 Nov 85 19:34:15 GMT
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*
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* Here's something you've all been waiting for: the AT&T public domain
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* source for getopt(3). It is the code which was given out at the 1985
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* UNIFORUM conference in Dallas. I obtained it by electronic mail
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* directly from AT&T. The people there assure me that it is indeed
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* in the public domain.
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*/
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#include <stdio.h>
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#include <string.h>
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static
int
opterr
= 1;
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static
int
optind
= 1;
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static
int
optopt
;
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static
char
*
optarg
;
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#undef fprintf
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static
int
getopt
(
int
argc,
char
*argv[],
char
*opts)
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{
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static
int
sp
= 1;
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int
c;
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char
*cp;
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if
(sp == 1)
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if
(
optind
>= argc ||
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argv[
optind
][0] !=
'-'
|| argv[
optind
][1] ==
'\0'
)
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return
EOF;
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else
if
(!strcmp(argv[
optind
],
"--"
)) {
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optind++;
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return
EOF;
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}
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optopt
= c = argv[
optind
][
sp
];
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if
(c ==
':'
|| (cp = strchr(opts, c)) ==
NULL
) {
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fprintf(stderr,
": illegal option -- %c\n"
, c);
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if
(argv[optind][++sp] ==
'\0'
) {
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optind++;
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sp = 1;
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}
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return
'?'
;
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}
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if
(*++cp ==
':'
) {
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if
(argv[optind][sp+1] !=
'\0'
)
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optarg
= &argv[optind++][sp+1];
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else
if
(++optind >= argc) {
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fprintf(stderr,
": option requires an argument -- %c\n"
, c);
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sp = 1;
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return
'?'
;
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}
else
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optarg
= argv[optind++];
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sp = 1;
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}
else
{
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if
(argv[optind][++sp] ==
'\0'
) {
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sp = 1;
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optind++;
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}
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optarg
=
NULL
;
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}
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return
c;
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}
optopt
static int optopt
Definition:
getopt.c:38
optind
static int optind
Definition:
getopt.c:37
opterr
static int opterr
Definition:
getopt.c:36
sp
#define sp
Definition:
regdef.h:63
NULL
NULL
Definition:
eval.c:52
getopt
static int getopt(int argc, char *argv[], char *opts)
Definition:
getopt.c:43
optarg
static char * optarg
Definition:
getopt.c:39