86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
/* $NetBSD: getopt.c,v 1.1 2009/03/22 22:33:13 joerg Exp $*/
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/* Modified by David Anderson to work with GNU/Linux and freebsd.
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Added {} for clarity.
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Switched to standard dwarfdump formatting.
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Treatment of : modified so that :: gets dwoptarg NULL
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if space follows the letter
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(the dwoptarg is set to null).
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*/
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/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. 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. Neither the name of the University nor the names of its 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 REGENTS 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 REGENTS 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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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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extern int dwopterr;
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extern int dwoptind;
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extern int dwoptopt;
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extern int dwoptreset;
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extern char *dwoptarg;
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int dwgetopt(int nargc, char * const nargv[], const char *ostr);
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/* As of October 2017 it seems adviseable to allow
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long option names. So based on a reading of
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'man 3 getopt' we reimplement a portion of GNU getopt_long().
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It's a wonderfully sensible design and all the credit
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should go to the original designers.
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We are not implementing all the features of GNU/Linux
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getopt_long(), just the features we wish to use.
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Specifically, we require val be 0 and flag
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be NULL and ignore those fields.
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We do not implement GNU digit_optind at all.
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Within these restrictions the interface behaves the same
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as GNU getopt_long() (or so it appears from the
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getopt documentation:
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release 4.04 of the Linux man-pages project,
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GETOPT(3),
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http://www.kernel.org/doc/man-pages/).
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*/
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struct dwoption {
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const char *name;
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int has_arg;
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int *flag;
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int val;
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};
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#define dwno_argument 0
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#define dwrequired_argument 1
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#define dwoptional_argument 2
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int dwgetopt_long(int nargc, char *const nargv[],
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const char *ostr,
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const struct dwoption* longopts,
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int *longindex);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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