| 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 | } |