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2ba45a60 DM |
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 | } |