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Aminet 25
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Aminet 25 (1998)(GTI - Schatztruhe)[!][Jun 1998].iso
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arc
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mpackWOS.lha
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mpackppc
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src
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getopt.c
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C/C++ Source or Header
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1998-04-08
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3KB
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/* (C) Copyright 1993,1994 by Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of Carnegie
* Mellon University not be used in advertising or publicity
* pertaining to distribution of the software without specific,
* written prior permission. Carnegie Mellon University makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#include <stdio.h>
#ifdef __OS2__
# include <io.h>
#endif
#if defined(__MSDOS__) || defined(__OS2__)
#define ERR(s, c) \
if (opterr) { \
char buff[3]; \
buff[0] = c; buff[1] = '\r'; buff[2] = '\n'; \
(void)write(2, av[0], strlen(av[0])); \
(void)write(2, s, strlen(s)); \
(void)write(2, buff, 3); \
}
#else /* __MSDOS__ */
#define ERR(s, c) \
if (opterr) { \
char buff[2]; \
buff[0] = c; buff[1] = '\n'; \
(void)write(2, av[0], strlen(av[0])); \
(void)write(2, s, strlen(s)); \
(void)write(2, buff, 2); \
}
#endif
int opterr = 1;
int optind = 1;
int optopt;
char *optarg;
/*
** Return options and their values from the command line.
** This comes from the AT&T public-domain getopt published in mod.sources
** (i.e., comp.sources.unix before the great Usenet renaming).
*/
int
getopt(ac, av, opts)
int ac;
char *av[];
char *opts;
{
extern char *strchr();
static int i = 1;
char *p;
/* Move to next value from argv? */
if (i == 1) {
if (optind >= ac ||
#if defined(__MSDOS__) || defined(__OS2__)
(av[optind][0] != '-' && av[optind][0] != '/')
#else
av[optind][0] != '-'
#endif
|| av[optind][1] == '\0')
return EOF;
if (strcmp(av[optind], "--") == 0) {
optind++;
return EOF;
}
}
/* Get next option character. */
if ((optopt = av[optind][i]) == ':'
|| (p = strchr(opts, optopt)) == NULL) {
ERR(": illegal option -- ", optopt);
if (av[optind][++i] == '\0') {
optind++;
i = 1;
}
return '?';
}
/* Snarf argument? */
if (*++p == ':') {
if (av[optind][i + 1] != '\0')
optarg = &av[optind++][i + 1];
else {
if (++optind >= ac) {
ERR(": option requires an argument -- ", optopt);
i = 1;
return '?';
}
optarg = av[optind++];
}
i = 1;
}
else {
if (av[optind][++i] == '\0') {
i = 1;
optind++;
}
optarg = NULL;
}
return optopt;
}