home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Almathera Ten Pack 2: CDPD 1
/
Almathera Ten on Ten - Disc 2: CDPD 1.iso
/
pd
/
351-375
/
351
/
pdc
/
pdcsrc.lzh
/
PDC
/
GetOpt.c
< prev
next >
Wrap
C/C++ Source or Header
|
1990-04-06
|
3KB
|
101 lines
/* PDC Compiler - A Freely Distributable C Compiler for the Amiga
* Based upon prior work by Matthew Brandt and Jeff Lydiatt.
*
* PDC Compiler release 3.3 Copyright (C) 1989 Paul Petersen and Lionel Hummel.
* PDC Software Distribution (C) 1989 Lionel Hummel and Paul Petersen.
*
* This code is freely redistributable upon the conditions that this
* notice remains intact and that modified versions of this file not be
* distributed as part of the PDC Software Distribution without the express
* consent of the copyright holders.
*
*------------------------------------------------------------------
*
* $Log: GetOpt.c,v $
* Revision 3.33 90/04/05 22:34:24 lionel
* None.
*
* Revision 3.32 90/02/03 16:24:27 lionel
* None
*
*------------------------------------------------------------------
*/
/*
* GetOpt.c Parse command line options
*
* Modification history (LDH): optsign variable added, along with the ability to
* distinguish between '+arg' and '-arg'
*/
#include <stdio.h>
#define ERR(spat, cpat) \
if (opterr) { errbuf[0] = cpat; errbuf[1] = '\n'; \
(void) fwrite( argv[0], 1, strlen(argv[0]), stderr); \
(void) fwrite( spat, 1, strlen(spat), stderr); \
(void) fwrite( errbuf, 1, 2, stderr); }
extern int strcmp();
extern char *index();
extern int strlen();
int opterr = 1;
int optind = 1;
int optopt;
char optsign;
char *optarg;
int
getopt(argc, argv, opts)
int argc;
char **argv, *opts;
{
static int sp = 1;
register int c;
register char *cp;
char errbuf[2];
if (sp == 1) {
if (optind >= argc)
return( EOF );
optsign = *argv[optind];
if ( (optsign != '-' && optsign != '+') || 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);
}