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123 lines
2.8 KiB
123 lines
2.8 KiB
3 years ago
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/* getopt_local.c */
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/* Public Domain getopt clone */
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/* Part of the ht://Dig package <http://www.htdig.org/> */
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/* Copyright (c) 2003 The ht://Dig Group */
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/* For copyright details, see the file COPYING in your distribution */
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/* or the GNU Library General Public License (LGPL) version 2 or later or later */
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/* <http://www.gnu.org/copyleft/lgpl.html> */
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/* Added to HtDig code June 2003 by Neal Richter, RightNow Technologies */
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/*
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** This getopt behaves pretty much like you would expect.
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** It does handle arguments like '-ab-' a little differently
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** then normal; I think the -- 'stop option processing' should
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** be treated like just another option, so that's what mine does.
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** Other getopts seem to ignore the second '-' in '-ab-'.
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**
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** I hereby place this version of getopt in
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** the public domain. Do with this what you will.
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** I'm sure there is a nicer and faster version out there
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** somewhere but I don't care!
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**
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** Robert Osborne, May 1991.
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*/
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#include <stdio.h>
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#include "getopt_local.h"
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#ifdef GETOPT_LOCAL
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int optind = 1;
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int opterr = 1;
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char *optarg = (char *) 0;
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static char *next_arg = (char *) 0;
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#define NO_OPT 0
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#define OPT_PLAIN 1
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#define OPT_ARG 2
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/* ----- getopt -------------------------------------- Oct 23, 1999 21:48 ---
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*/
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int
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getopt(int argc, char *argv[], char *optstring)
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{
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int ret;
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int which = NO_OPT;
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if (next_arg == (char*) 0)
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{
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if (argv[optind] == (char *) 0 || argv[optind][0] != '-')
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return -1;
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next_arg = &argv[optind][1];
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}
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if ((*next_arg == '\0') || (*next_arg == '-'))
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{
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optind++;
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return -1;
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}
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while(*optstring)
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if (*next_arg == *optstring++)
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which = (*optstring == ':') ? OPT_ARG : OPT_PLAIN;
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switch (which)
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{
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case NO_OPT:
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case OPT_PLAIN:
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ret = *next_arg++;
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if (*next_arg == '\0')
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{
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optind++;
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next_arg = (char *)0;
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}
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if (which == OPT_PLAIN)
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return ret;
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if (opterr)
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fprintf(stderr, "%s: illegal option -- %c\n", argv[0], ret);
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return '?';
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case OPT_ARG:
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ret = *next_arg++;
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optind++;
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if (*next_arg != '\0')
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{
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optarg = next_arg;
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next_arg = (char*) 0;
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return ret;
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}
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if (argv[optind] != (char*) 0)
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{
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optarg = argv[optind];
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optind++;
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next_arg = (char*) 0;
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return ret;
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}
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next_arg = (char*) 0;
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if (opterr)
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fprintf(stderr, "%s: option requires an option -- %c\n",
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argv[0], ret);
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return '?';
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}
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return(-1);
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}
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#elif defined(_MSC_VER) /* _WIN32 */
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#error _MSC_VER but !GETOPT_LOCAL
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#endif /* GETOPT_LOCAL */
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