| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * This file was copied from the following newsgroup posting: |
| 21 | * |
| 22 | * Newsgroups: mod.std.unix |
| 23 | * Subject: public domain AT&T getopt source |
| 24 | * Date: 3 Nov 85 19:34:15 GMT |
| 25 | * |
| 26 | * Here's something you've all been waiting for: the AT&T public domain |
| 27 | * source for getopt(3). It is the code which was given out at the 1985 |
| 28 | * UNIFORUM conference in Dallas. I obtained it by electronic mail |
| 29 | * directly from AT&T. The people there assure me that it is indeed |
| 30 | * in the public domain. |
| 31 | */ |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | |
| 36 | static int opterr = 1; |
| 37 | static int optind = 1; |
| 38 | static int optopt; |
| 39 | static char *optarg; |
| 40 | |
| 41 | static int getopt(int argc, char *argv[], char *opts) |
| 42 | { |
| 43 | static int sp = 1; |
| 44 | int c; |
| 45 | char *cp; |
| 46 | |
| 47 | if (sp == 1) { |
| 48 | if (optind >= argc || |
| 49 | argv[optind][0] != '-' || argv[optind][1] == '\0') |
| 50 | return EOF; |
| 51 | else if (!strcmp(argv[optind], "--")) { |
| 52 | optind++; |
| 53 | return EOF; |
| 54 | } |
| 55 | } |
| 56 | optopt = c = argv[optind][sp]; |
| 57 | if (c == ':' || !(cp = strchr(opts, c))) { |
| 58 | fprintf(stderr, ": illegal option -- %c\n", c); |
| 59 | if (argv[optind][++sp] == '\0') { |
| 60 | optind++; |
| 61 | sp = 1; |
| 62 | } |
| 63 | return '?'; |
| 64 | } |
| 65 | if (*++cp == ':') { |
| 66 | if (argv[optind][sp+1] != '\0') |
| 67 | optarg = &argv[optind++][sp+1]; |
| 68 | else if(++optind >= argc) { |
| 69 | fprintf(stderr, ": option requires an argument -- %c\n", c); |
| 70 | sp = 1; |
| 71 | return '?'; |
| 72 | } else |
| 73 | optarg = argv[optind++]; |
| 74 | sp = 1; |
| 75 | } else { |
| 76 | if (argv[optind][++sp] == '\0') { |
| 77 | sp = 1; |
| 78 | optind++; |
| 79 | } |
| 80 | optarg = NULL; |
| 81 | } |
| 82 | |
| 83 | return c; |
| 84 | } |