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#include "args.h"
int args_optind = 1;
int
args_getopt(int argc, char *argv[], const char *optstring, char **args_optarg)
{
char option;
if (args_optind >= argc) return -1;
if (argv[args_optind][0] != '-'
|| strlen(argv[args_optind]) > 2
|| !strcmp(argv[args_optind], "-")) {
*args_optarg = argv[args_optind];
args_optind++;
return 0;
}
int i;
option = argv[args_optind][1];
for (i = 0; i < strlen(optstring); i++) {
if (optstring[i + 1] == ':' && optstring[i] == option) {
*args_optarg = argv[++args_optind];
args_optind++;
return option;
} else if (optstring[i + 1] != ':' && optstring[i] == option) {
args_optind++;
return option;
}
}
args_optarg = 0;
args_optind++;
return -2;
}
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