Wingetopt.c

/*
POSIX getopt for Windows
http://note.sonots.com/Comp/CompLang/cpp/getopt.html

AT&T Public License

Code given out at the 1985 UNIFORUM conference in Dallas.  
*/

#ifndef __GNUC__

#include "Wingetopt.h"
#include <stdio.h>


int     opterr = 1;
int     optind = 1;
int     optopt;
char    *optarg;

int
getopt(argc, argv, opts)
int     argc;
char    **argv, *opts;
{
    static int sp = 1;
    register int c;
    register char *cp;
    if(sp == 1)
        if(optind >= argc ||
           argv[optind][0] != '-' || argv[optind][1] == '\0')
            return(-1);
        else if(strcmp(argv[optind], "--") == 0) {
            optind++;
            return(-1);
        }
    optopt = c = argv[optind][sp];
    if(c == ':' || (cp=(char*)strchr(opts, c)) == NULL) {
        //ERR(": illegal option -- ", c);
        if(argv[optind][++sp] == '\0') {
            optind++;
            sp = 1;
        }
        return('?');
    }
    if(*++cp == ':') {
        if(argv[optind][sp+1] != '\0')
            optarg = &argv[optind++][sp+1];
        else if(++optind >= argc) {
            //ERR(": option requires an argument -- ", c);
            sp = 1;
            return('?');
        } else
            optarg = argv[optind++];
        sp = 1;
    } else {
        if(argv[optind][++sp] == '\0') {
            sp = 1;
            optind++;
        }
        optarg = NULL;
    }
    return(c);
}

#endif  /* __GNUC__ */