src/util/getopt.c File Reference

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

Include dependency graph for getopt.c:

Go to the source code of this file.

Functions
void	util_getopt_reset (void)
int	util_getopt (int argc, char *const argv[], char const *optstring)
Variables
char *	util_optarg
int	util_optind = 0
static char *	scan

---

Function Documentation

int util_getopt	(	int	argc,
		char *const	argv[],
		char const *	optstring
	)

Definition at line 40 of file getopt.c.

{
    register int c;
    register char *place;

    util_optarg = NIL(char);

    if (scan == NIL(char) || *scan == '\0') {
        if (util_optind == 0) util_optind++;
        if (util_optind >= argc) return EOF;
        place = argv[util_optind];
        if (place[0] != '-' || place[1] == '\0') return EOF;
        util_optind++;
        if (place[1] == '-' && place[2] == '\0') return EOF;
        scan = place+1;
    }

    c = *scan++;
    place = strchr(optstring, c);
    if (place == NIL(char) || c == ':') {
        (void) fprintf(stderr, "%s: unknown option %c\n", argv[0], c);
        return '?';
    }
    if (*++place == ':') {
        if (*scan != '\0') {
            util_optarg = scan;
            scan = NIL(char);
        } else {
            if (util_optind >= argc) {
                (void) fprintf(stderr, "%s: %c requires an argument\n", 
                    argv[0], c);
                return '?';
            }
            util_optarg = argv[util_optind];
            util_optind++;
        }
    }
    return c;
}

void util_getopt_reset

(

void

)

Definition at line 30 of file getopt.c.

{
    util_optarg = 0;
    util_optind = 0;
    scan = 0;
}

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Variable Documentation

char* scan [static]

Definition at line 26 of file getopt.c.

char* util_optarg

Definition at line 24 of file getopt.c.

int util_optind = 0

Definition at line 25 of file getopt.c.