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    Length: 1984 (0x7c0)
    Types: TextFile
    Names: »getopt.c«

└─⟦b20c6495f⟧ Bits:30007238 EUUGD18: Wien-båndet, efterår 1987
    └─⟦this⟧ »EUUGD18/General/Trek73/src/getopt.c« 

TextFile

#ident "@(#) TREK73 $Header: getopt.c,v 1.1 87/10/09 11:07:10 okamoto Exp $"
/*
 * $Source: /ccc/okamoto/src/trek/src/RCS/getopt.c,v $
 *
 * $Header: getopt.c,v 1.1 87/10/09 11:07:10 okamoto Exp $
 *
 * $Log:	getopt.c,v $
 * Revision 1.1  87/10/09  11:07:10  11:07:10  okamoto (Jeff Okamoto)
 * Initial revision
 * 
 */
#include <stdio.h>

/*
**  This is the public-domain AT&T getopt(3) code.  I added the
**  #ifndef stuff because I include <stdio.h> for the program;
**  getopt, per se, doesn't need it.  I also added the INDEX/index
**  hack (the original used strchr, of course).  And, note that
**  technically the casts in the write(2) calls shouldn't be there.
*/

#ifndef NULL
#define NULL	0
#endif
#ifndef EOF
#define EOF	(-1)
#endif
#ifndef INDEX
#define INDEX index
#endif


#define ERR(s, c)	if(opterr){\
	extern int strlen(), write();\
	char errbuf[2];\
	errbuf[0] = c; errbuf[1] = '\n';\
	(void) write(2, argv[0], (unsigned)strlen(argv[0]));\
	(void) write(2, s, (unsigned)strlen(s));\
	(void) write(2, errbuf, 2);}

extern int strcmp();
extern char *INDEX();

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(EOF);
		else if(strcmp(argv[optind], "--") == NULL) {
			optind++;
			return(EOF);
		}
	optopt = c = argv[optind][sp];
	if(c == ':' || (cp=INDEX(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);
}