/* * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* * This file was copied from the following newsgroup posting: * * Newsgroups: mod.std.unix * Subject: public domain AT&T getopt source * Date: 3 Nov 85 19:34:15 GMT * * Here's something you've all been waiting for: the AT&T public domain * source for getopt(3). It is the code which was given out at the 1985 * UNIFORUM conference in Dallas. I obtained it by electronic mail * directly from AT&T. The people there assure me that it is indeed * in the public domain. */ #include <stdio.h> #include <string.h> static int opterr = 1; static int optind = 1; static int optopt; static char *optarg; static int getopt(int argc, char *argv[], char *opts) { static int sp = 1; int c; char *cp; if (sp == 1) if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0') return EOF; else if (!strcmp(argv[optind], "--")) { optind++; return EOF; } optopt = c = argv[optind][sp]; if (c == ':' || !(cp = strchr(opts, c))) { fprintf(stderr, ": illegal option -- %c\n", c); if (argv[optind][++sp] == '\0') { optind++; sp = 1; } return '?'; } if (*++cp == ':') { if (argv[optind][sp+1] != '\0') optarg = &argv[optind++][sp+1]; else if(++optind >= argc) { fprintf(stderr, ": option requires an argument -- %c\n", c); sp = 1; return '?'; } else optarg = argv[optind++]; sp = 1; } else { if (argv[optind][++sp] == '\0') { sp = 1; optind++; } optarg = NULL; } return c; }