blob: 41a641f7c8a9b0fd5cc5f2837dde3c0fb54ed260
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 | } |
85 |