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85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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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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}
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optopt = c = argv[optind][sp];
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if (c == ':' || !(cp = strchr(opts, c))) {
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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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}
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