134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
/*
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* $Id: getopt.c 160 2008-04-08 13:59:49Z baconevi $
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*
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* {License}
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*/
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#include <ase/utl/getopt.h>
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#include <ase/cmn/str.h>
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/*
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* ase_getopt is based on BSD getopt.
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* --------------------------------------------------------------------------
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*
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* Copyright (c) 1987-2002 The Regents of the University of California.
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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 are met:
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*
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* A. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* B. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* C. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* --------------------------------------------------------------------------
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define BADCH ASE_T('?')
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#define BADARG ASE_T(':')
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#define EMSG ASE_T("")
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#define optstr opt->str
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#define optarg opt->arg
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#define optind opt->ind
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#define optopt opt->opt
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#define place opt->cur
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ase_cint_t ase_getopt (int argc, ase_char_t* const* argv, ase_opt_t* opt)
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{
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ase_char_t* oli; /* option letter list index */
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if (place == ASE_NULL)
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{
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place = EMSG;
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optind = 1;
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}
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if (*place == ASE_T('\0'))
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{
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/* update scanning pointer */
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if (optind >= argc || *(place = argv[optind]) != ASE_T('-'))
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{
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place = EMSG;
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return ASE_CHAR_EOF;
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}
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if (place[1] != ASE_T('\0') && *++place == ASE_T('-'))
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{
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/* found "--" */
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++optind;
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place = EMSG;
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return ASE_CHAR_EOF;
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}
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} /* option letter okay? */
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if ((optopt = *place++) == ASE_T(':') ||
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(oli = ase_strchr(optstr, optopt)) == ASE_NULL)
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{
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/*
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* if the user didn't specify '-' as an option,
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* assume it means EOF.
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*/
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if (optopt == (int)'-') return ASE_CHAR_EOF;
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if (*place == ASE_T('\0')) ++optind;
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return BADCH;
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}
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if (*++oli != ASE_T(':'))
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{
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/* don't need argument */
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optarg = ASE_NULL;
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if (*place == ASE_T('\0')) ++optind;
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}
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else
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{
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/* need an argument */
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if (*place != ASE_T('\0'))
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{
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/* no white space */
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optarg = place;
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}
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else if (argc <= ++optind)
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{
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/* no arg */
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place = EMSG;
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/*if (*optstr == ASE_T(':'))*/ return BADARG;
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/*return BADCH;*/
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}
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else
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{
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/* white space */
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optarg = argv[optind];
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}
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place = EMSG;
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++optind;
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}
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return optopt; /* dump back option letter */
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}
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