a71ece51 |
1 | /*---------------------------------------------------------------------- |
2 | |
3 | Replacement for Unix "getopt()", for DOS/Windows/etc. |
4 | |
5 | getopt.c 1.3 2003/09/17 16:17:59 |
6 | |
7 | Copyright (C) 1998, 2003 by David A. Hinds -- All Rights Reserved |
8 | |
9 | This file is part of ASPEX. |
10 | |
11 | ASPEX is free software; you can redistribute it and/or modify it |
12 | under the terms of the GNU General Public License as published by |
13 | the Free Software Foundation; either version 2 of the License, or |
14 | (at your option) any later version. |
15 | |
16 | ASPEX is distributed in the hope that it will be useful, but |
17 | WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | General Public License for more details. |
20 | |
21 | You should have received a copy of the GNU General Public License |
22 | along with ASPEX; if not, write to the Free Software Foundation, |
23 | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
24 | |
25 | ----------------------------------------------------------------------*/ |
26 | |
27 | #include "string.h" |
28 | #include "stdio.h" |
29 | #include "getopt.h" |
30 | |
31 | char *optarg; |
32 | int optind = 1, opterr, optopt; |
33 | int pos = 0; |
34 | int getopt(int argc, char *argv[], const char *optstring) |
35 | { |
36 | //static int pos = 0; |
37 | char *str; |
38 | |
39 | if (pos == 0) { |
40 | if ((optind >= argc) || (*argv[optind] != '-')) |
41 | return EOF; |
42 | pos = 1; |
43 | if (argv[optind][pos] == '\0') |
44 | return EOF; |
45 | } |
46 | |
47 | str = strchr(optstring, argv[optind][pos]); |
48 | if (str == NULL) { |
49 | optopt = argv[optind][pos]; |
50 | if (opterr) |
51 | fprintf(stderr, "%s: illegal option -- %c\n", argv[0], |
52 | optopt); |
53 | return '?'; |
54 | } |
55 | |
56 | if (str[1] == ':') { |
57 | if (argv[optind][pos+1] != '\0') { |
58 | optarg = &argv[optind][pos+1]; |
59 | return *str; |
60 | } |
61 | optind++; |
62 | if (optind >= argc) { |
63 | optopt = *str; |
64 | if (opterr) |
65 | fprintf(stderr, "%s: option requires an argument -- %c\n", |
66 | argv[0], optopt); |
67 | return '?'; |
68 | } |
69 | optarg = argv[optind]; |
70 | optind++; pos = 0; |
71 | return *str; |
72 | } |
73 | else { |
74 | pos++; |
75 | if (argv[optind][pos] == '\0') { |
76 | optind++; |
77 | pos = 0; |
78 | } |
79 | return *str; |
80 | } |
81 | } |