215 lines
6.1 KiB
C
215 lines
6.1 KiB
C
/*
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* $Id$
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*
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Copyright (c) 2006-2019 Chung, Hyung-Hwan. All rights reserved.
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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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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <qse/cmn/opt.h>
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#include <qse/cmn/str.h>
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/*
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* qse_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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#define BADCH QSE_T('?')
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#define BADARG QSE_T(':')
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#define EMSG QSE_T("")
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qse_cint_t qse_getopt (int argc, qse_char_t* const* argv, qse_opt_t* opt)
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{
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qse_char_t* oli; /* option letter list index */
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int dbldash = 0;
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opt->arg = QSE_NULL;
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opt->lngopt = QSE_NULL;
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if (opt->cur == QSE_NULL)
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{
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opt->cur = EMSG;
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opt->ind = 1;
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}
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if (*opt->cur == QSE_T('\0'))
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{
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/* update scanning pointer */
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if (opt->ind >= argc || *(opt->cur = argv[opt->ind]) != QSE_T('-'))
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{
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/* All arguments have been processed or the current
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* argument doesn't start with a dash */
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opt->cur = EMSG;
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return QSE_CHAR_EOF;
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}
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opt->cur++;
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#if 0
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if (*opt->cur == QSE_T('\0'))
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{
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/* - */
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opt->ind++;
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opt->cur = EMSG;
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return QSE_CHAR_EOF;
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}
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#endif
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if (*opt->cur == QSE_T('-'))
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{
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if (*++opt->cur == QSE_T('\0'))
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{
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/* -- */
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opt->ind++;
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opt->cur = EMSG;
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return QSE_CHAR_EOF;
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}
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else
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{
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dbldash = 1;
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}
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}
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}
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if (dbldash && opt->lng != QSE_NULL)
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{
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const qse_opt_lng_t* o;
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qse_char_t* end = opt->cur;
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while (*end != QSE_T('\0') && *end != QSE_T('=')) end++;
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for (o = opt->lng; o->str; o++)
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{
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const qse_char_t* str = o->str;
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if (*str == QSE_T(':')) str++;
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if (qse_strxcmp (opt->cur, end-opt->cur, str) != 0) continue;
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/* match */
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opt->cur = EMSG;
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opt->lngopt = o->str;
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/* for a long matching option, remove the leading colon */
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if (opt->lngopt[0] == QSE_T(':')) opt->lngopt++;
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if (*end == QSE_T('=')) opt->arg = end + 1;
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if (*o->str != QSE_T(':'))
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{
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/* should not have an option argument */
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if (opt->arg != QSE_NULL) return BADARG;
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}
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else if (opt->arg == QSE_NULL)
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{
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/* check if it has a remaining argument
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* available */
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if (argc <= ++opt->ind) return BADARG;
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/* If so, the next available argument is
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* taken to be an option argument */
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opt->arg = argv[opt->ind];
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}
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opt->ind++;
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return o->val;
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}
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/*if (*end == QSE_T('=')) *end = QSE_T('\0');*/
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opt->lngopt = opt->cur;
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return BADCH;
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}
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if ((opt->opt = *opt->cur++) == QSE_T(':') ||
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(oli = qse_strchr(opt->str, opt->opt)) == QSE_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 (opt->opt == (int)'-') return QSE_CHAR_EOF;
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if (*opt->cur == QSE_T('\0')) ++opt->ind;
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return BADCH;
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}
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if (*++oli != QSE_T(':'))
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{
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/* don't need argument */
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if (*opt->cur == QSE_T('\0')) opt->ind++;
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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 (*opt->cur != QSE_T('\0'))
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{
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/* no white space */
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opt->arg = opt->cur;
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}
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else if (argc <= ++opt->ind)
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{
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/* no arg */
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opt->cur = EMSG;
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/*if (*opt->str == QSE_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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opt->arg = argv[opt->ind];
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}
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opt->cur = EMSG;
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opt->ind++;
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}
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return opt->opt; /* dump back option letter */
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}
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