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/*----------------------------------------------------------------------
Replacement for Unix "getopt()", for DOS/Windows/etc.
getopt.c 1.3 2003/09/17 16:17:59
Copyright (C) 1998, 2003 by David A. Hinds -- All Rights Reserved
This file is part of ASPEX.
ASPEX is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
ASPEX is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with ASPEX; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
----------------------------------------------------------------------*/
#include "string.h"
#include "stdio.h"
#include "getopt.h"
#ifdef WINDOWS
#define OPTCHAR '/'
#else
#define OPTCHAR '-'
#endif
char *optarg;
int optind = 1, opterr, optopt;
int getopt(int argc, char *argv[], const char *optstring)
{
static int pos = 0;
char *str;
if (pos == 0) {
if ((optind >= argc) || (*argv[optind] != OPTCHAR)) {
return EOF;
}
pos = 1;
if (argv[optind][pos] == '\0') {
return EOF;
}
}
str = strchr(optstring, argv[optind][pos]);
if (str == NULL) {
optopt = argv[optind][pos];
if (opterr)
fprintf(stderr, "%s: illegal option -- %c\n", argv[0],
optopt);
return '?';
}
if (str[1] == ':') {
if (argv[optind][pos+1] != '\0') {
optarg = &argv[optind][pos+1];
return *str;
}
optind++;
if (optind >= argc) {
optopt = *str;
if (opterr)
fprintf(stderr, "%s: option requires an argument -- %c\n",
argv[0], optopt);
return '?';
}
optarg = argv[optind];
optind++; pos = 0;
return *str;
} else {
pos++;
if (argv[optind][pos] == '\0') {
optind++;
pos = 0;
}
return *str;
}
}
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