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fe81b478 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
31char *optarg;
32int optind = 1, opterr, optopt;
f46c3663 33int pos = 0;
fe81b478 34int getopt(int argc, char *argv[], const char *optstring)
35{
f46c3663 36 //static int pos = 0;
fe81b478 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}
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