108 lines
4.2 KiB
C
108 lines
4.2 KiB
C
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/*
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* getopt.h
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*
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* Defines constants and function prototypes required to implement
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* the getopt(), getopt_long() and getopt_long_only() APIs.
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*
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* $Id: getopt.h,v 7fd51383513c 2017/02/11 12:35:12 keithmarshall $
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*
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* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
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* Copyright (C) 2003, 2008, 2009, 2017, MinGW.org Project.
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, this permission notice, and the following
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* disclaimer shall be included in all copies or substantial portions of
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* the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OF OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef _GETOPT_H
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#pragma GCC system_header
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#ifndef __UNISTD_H_SOURCED__
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/* POSIX requires the getopt() API to be specified in <unistd.h>; thus,
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* <unistd.h> includes <getopt.h>. However, we do not want to expose the
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* getopt_long() or getopt_long_only() APIs, when included in this manner.
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* Thus, we process only part of <getopt.h> when __UNISTD_H_SOURCED__ has
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* been defined, and activate the _GETOPT_H repeat inclusion guard macro
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* only when it has not.
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*/
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#define _GETOPT_H
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/* All MinGW headers are required to include <_mingw.h>, before anything
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* else; however, when sourced by <unistd.h>, this has been done already.
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*/
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#include <_mingw.h>
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#endif
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_BEGIN_C_DECLS
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#if ! (defined _GETOPT_H && defined _UNISTD_H)
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/* This section of <getopt.h> is always to be processed, but it doesn't
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* need to be processed twice; if both _GETOPT_H and _UNISTD_H have been
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* defined, when we get to here, then we have reached this point for the
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* second time, so we may safely skip this section.
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*/
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extern int optind; /* index of first non-option in argv */
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extern int optopt; /* single option character, as parsed */
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extern int opterr; /* flag to enable built-in diagnostics... */
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/* (user may set to zero, to suppress) */
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extern char *optarg; /* pointer to argument of current option */
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extern int getopt( int, char * const [], const char * );
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#ifdef _BSD_SOURCE
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/* BSD adds the non-standard "optreset" feature, for reinitialization
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* of getopt() parsing. We support this feature, for applications which
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* proclaim their BSD heritage, before including this header; however,
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* to maintain portability, developers are advised to avoid it.
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*/
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# define optreset __mingw_optreset
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extern int optreset;
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#endif /* _BSD_SOURCE */
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#endif /* !(_GETOPT_H && _UNISTD_H) */
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#ifdef _GETOPT_H
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/* This is the section of <getopt.h> which declares the getopt_long()
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* and getopt_long_only() APIs; it is processed only when <getopt.h>
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* is included directly.
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*/
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struct option /* specification for a long form option... */
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{ const char *name; /* option name, without leading hyphens */
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int has_arg; /* does it take an argument? */
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int *flag; /* where to save its status, or NULL */
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int val; /* its associated status value */
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};
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enum /* permitted values for its "has_arg" field... */
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{ no_argument = 0, /* option never takes an argument */
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required_argument, /* option always requires an argument */
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optional_argument /* option may take an argument */
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};
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extern int getopt_long( int, char * const [], const char *, const struct option *, int * );
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extern int getopt_long_only( int, char * const [], const char *, const struct option *, int * );
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#endif /* _GETOPT_H */
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_END_C_DECLS
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#endif /* !_GETOPT_H: $RCSfile: getopt.h,v $: end of file */
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