124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
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/*
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* Copyright (c) 2000, Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: cfopt.c,v 1.3 2000/07/11 01:51:49 bp Exp $
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*/
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#include <sys/param.h>
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#include <stdio.h>
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#include <string.h>
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#include <cflib.h>
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extern char *__progname;
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int cf_opterr = 1, /* if error message should be printed */
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cf_optind = 1, /* index into parent argv vector */
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cf_optopt, /* character checked for validity */
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cf_optreset; /* reset getopt */
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const char* cf_optarg; /* argument associated with option */
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#define BADCH (int)'?'
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#define BADARG (int)':'
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#define EMSG ""
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int
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cf_getopt(nargc, nargv, ostr)
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int nargc;
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char * const *nargv;
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const char *ostr;
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{
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static const char *place = EMSG; /* option letter processing */
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char *oli; /* option letter list index */
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int tmpind;
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if (cf_optreset || !*place) { /* update scanning pointer */
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cf_optreset = 0;
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tmpind = cf_optind;
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while (1) {
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if (tmpind >= nargc) {
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place = EMSG;
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return (-1);
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}
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if (*(place = nargv[tmpind]) != '-') {
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tmpind++;
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continue; /* lookup next option */
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}
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if (place[1] && *++place == '-') { /* found "--" */
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cf_optind = ++tmpind;
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place = EMSG;
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return (-1);
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}
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cf_optind = tmpind;
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break;
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}
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} /* option letter okay? */
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if ((cf_optopt = (int)*place++) == (int)':' ||
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!(oli = strchr(ostr, cf_optopt))) {
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/*
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* if the user didn't specify '-' as an option,
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* assume it means -1.
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*/
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if (cf_optopt == (int)'-')
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return (-1);
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if (!*place)
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++cf_optind;
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if (cf_opterr && *ostr != ':')
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(void)fprintf(stderr,
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"%s: illegal option -- %c\n", __progname, cf_optopt);
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return (BADCH);
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}
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if (*++oli != ':') { /* don't need argument */
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cf_optarg = NULL;
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if (!*place)
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++cf_optind;
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}
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else { /* need an argument */
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if (*place) /* no white space */
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cf_optarg = place;
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else if (nargc <= ++cf_optind) { /* no arg */
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place = EMSG;
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if (*ostr == ':')
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return (BADARG);
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if (cf_opterr)
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(void)fprintf(stderr,
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"%s: option requires an argument -- %c\n",
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__progname, cf_optopt);
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return (BADCH);
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}
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else /* white space */
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cf_optarg = nargv[cf_optind];
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place = EMSG;
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++cf_optind;
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}
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return (cf_optopt); /* dump back option letter */
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}
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