getopt.c File Reference

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

Include dependency graph for getopt.c:

Go to the source code of this file.

Functions
char *	strchr ()
int	getopt (int argc, argv, char *optstring)

Variables
char *	optarg
int	optind = 0
static char *	scan = ((void *)0)

Function Documentation

int getopt	(	int	argc,
		argv	,
		char *	optstring
	)

Definition at line 37 of file getopt.c.

{
    register char c;
    register char *place;
    
    optarg = NULL;
    
    if (scan == NULL || *scan == '\0') {
    if (optind == 0)
        optind++;
    
    if (optind >= argc || argv[optind][0] != '-' ||
        argv[optind][1] == '\0')
        return( EOF );

    if (strcmp(argv[optind], "--")==0) {
        optind++;
        return( EOF );
    }
    
    scan = argv[optind]+1;
    optind++;
    }
    
    c = *scan++;
    place = index(optstring, c);
    
    if (place == NULL || c == ':') {
    fprintf(stderr, "%s: unknown option -%c\n", argv[0], c);
    return( '?' );
    }
    
    place++;
    if (*place == ':') {
    if (*scan != '\0') {
        optarg = scan;
        scan = NULL;
    } else {
        if (optind >= argc) {
        fprintf(stderr,
            "%s: missing argument after -%c\n",
            argv[0], c);
        return( '?' );
        }
        optarg = argv[optind];
        optind++;
    }
    }
    
    return( c );
}

char* strchr

(

)

Variable Documentation

char* optarg

Definition at line 29 of file getopt.c.

Referenced by main().

int optind = 0

Definition at line 30 of file getopt.c.

Referenced by main().

char* scan = ((void *)0)

static

Definition at line 32 of file getopt.c.