905 lines
28 KiB
C
905 lines
28 KiB
C
#ifndef __GETOPT_H__
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/**
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* DISCLAIMER
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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*
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* The mingw-w64 runtime package and its code is distributed in the hope that it
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* will be useful but WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESSED OR
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* IMPLIED ARE HEREBY DISCLAIMED. This includes but is not limited to
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* warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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* Implementation of the `getopt', `getopt_long' and `getopt_long_only'
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* APIs, for inclusion in the MinGW runtime library.
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*
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* This file is part of the MinGW32 package set.
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*
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* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
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* Copyright (C) 2008, 2009, 2011, 2012, MinGW.org Project.
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*
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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 OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* ---------------------------------------------------------------------------
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*
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*/
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#define __GETOPT_H__
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/* All the headers include this file. */
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#include <crtdefs.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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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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/* Identify how to get the calling program name, for use in messages...
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*/
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#ifdef __CYGWIN__
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/*
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* CYGWIN uses this DLL reference...
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*/
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# define PROGNAME __progname
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extern char __declspec(dllimport) *__progname;
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#else
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/*
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* ...while elsewhere, we simply use the first argument passed.
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*/
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# define PROGNAME *argv
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#endif
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extern int getopt(int nargc, char * const *nargv, const char *options);
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#ifdef _BSD_SOURCE
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/*
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* BSD adds the non-standard `optreset' feature, for reinitialisation
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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
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#ifdef __cplusplus
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}
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#endif
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/*
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* POSIX requires the `getopt' API to be specified in `unistd.h';
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* thus, `unistd.h' includes this header. However, we do not want
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* to expose the `getopt_long' or `getopt_long_only' APIs, when
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* included in this manner. Thus, close the standard __GETOPT_H__
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* declarations block, and open an additional __GETOPT_LONG_H__
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* specific block, only when *not* __UNISTD_H_SOURCED__, in which
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* to declare the extended API.
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*/
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#endif /* !defined(__GETOPT_H__) */
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#if !defined(__UNISTD_H_SOURCED__) && !defined(__GETOPT_LONG_H__)
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#define __GETOPT_LONG_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct option /* specification for a long form option... */
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{
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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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{
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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 nargc, char * const *nargv, const char *options,
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const struct option *long_options, int *idx);
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extern int getopt_long_only(int nargc, char * const *nargv, const char *options,
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const struct option *long_options, int *idx);
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/*
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* Previous MinGW implementation had...
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*/
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#ifndef HAVE_DECL_GETOPT
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/*
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* ...for the long form API only; keep this for compatibility.
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*/
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# define HAVE_DECL_GETOPT 1
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#endif
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/* Identify how to get the calling program name, for use in messages...
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*/
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#ifdef __CYGWIN__
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/*
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* CYGWIN uses this DLL reference...
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*/
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# define PROGNAME __progname
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extern char __declspec(dllimport) *__progname;
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#else
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/*
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* ...while elsewhere, we simply use the first argument passed.
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*/
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# define PROGNAME *argv
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#endif
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/* Initialise the public variables. */
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int optind = 1; /* index for first non-option arg */
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int opterr = 1; /* enable built-in error messages */
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char *optarg = NULL; /* pointer to current option argument */
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#define CHAR char /* argument type selector */
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#define getopt_switchar '-' /* option prefix character in argv */
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#define getopt_pluschar '+' /* prefix for POSIX mode in optstring */
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#define getopt_takes_argument ':' /* marker for optarg in optstring */
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#define getopt_arg_assign '=' /* longopt argument field separator */
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#define getopt_unknown '?' /* return code for unmatched option */
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#define getopt_ordered 1 /* return code for ordered non-option */
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#define getopt_all_done -1 /* return code to indicate completion */
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enum
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{ /* All `getopt' API functions are implemented via calls to the
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* common static function `getopt_parse()'; these `mode' selectors
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* determine the behaviour of `getopt_parse()', to deliver the
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* appropriate result in each case.
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*/
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getopt_mode_standard = 0, /* getopt() */
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getopt_mode_long, /* getopt_long() */
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getopt_mode_long_only /* getopt_long_only() */
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};
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enum
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{ /* When attempting to match a command line argument to a long form option,
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* these indicate the status of the match.
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*/
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getopt_no_match = 0, /* no successful match */
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getopt_abbreviated_match, /* argument is an abbreviation for an option */
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getopt_exact_match /* argument matches the full option name */
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};
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int optopt = getopt_unknown; /* return value for option being evaluated */
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/* Some BSD applications expect to be able to reinitialise `getopt' parsing
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* by setting a global variable called `optreset'. We provide an obfuscated
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* API, which allows applications to emulate this brain damage; however, any
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* use of this is non-portable, and is strongly discouraged.
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*/
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#define optreset __mingw_optreset
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int optreset = 0;
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static
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int getopt_missing_arg( const CHAR *optstring )
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{
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/* Helper function to determine the appropriate return value,
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* for the case where a required option argument is missing.
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*/
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if( (*optstring == getopt_pluschar) || (*optstring == getopt_switchar) )
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++optstring;
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return (*optstring == getopt_takes_argument)
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? getopt_takes_argument
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: getopt_unknown;
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}
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/* `complain' macro facilitates the generation of simple built-in
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* error messages, displayed on various fault conditions, provided
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* `opterr' is non-zero.
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*/
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#define complain( MSG, ARG ) if( opterr ) \
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fprintf( stderr, "%s: "MSG"\n", PROGNAME, ARG )
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static
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int getopt_argerror( int mode, char *fmt, CHAR *prog, struct option *opt, int retval )
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{
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/* Helper function, to generate more complex built-in error
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* messages, for invalid arguments to long form options ...
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*/
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if( opterr )
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{
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/* ... but, displayed only if `opterr' is non-zero.
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*/
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char flag[] = "--";
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if( mode != getopt_mode_long )
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/*
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* only display one hyphen, for implicit long form options,
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* improperly resolved by `getopt_long_only()'.
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*/
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flag[1] = 0;
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/*
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* always preface the program name ...
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*/
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fprintf( stderr, "%s: ", prog );
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/*
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* to the appropriate, option specific message.
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*/
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fprintf( stderr, fmt, flag, opt->name );
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}
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/* Whether displaying the message, or not, always set `optopt'
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* to identify the faulty option ...
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*/
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optopt = opt->val;
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/*
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* and return the `invalid option' indicator.
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*/
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return retval;
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}
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/* `getopt_conventions' establish behavioural options, to control
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* the operation of `getopt_parse()', e.g. to select between POSIX
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* and GNU style argument parsing behaviour.
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*/
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#define getopt_set_conventions 0x1000
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#define getopt_posixly_correct 0x0010
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static
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int getopt_conventions( int flags )
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{
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static int conventions = 0;
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if( (conventions == 0) && ((flags & getopt_set_conventions) == 0) )
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{
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/* default conventions have not yet been established;
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* initialise them now!
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*/
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conventions = getopt_set_conventions;
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if( flags == getopt_pluschar )
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conventions |= getopt_posixly_correct;
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}
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else if( flags & getopt_set_conventions )
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/*
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* default conventions may have already been established,
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* but this is a specific request to augment them.
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*/
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conventions |= flags;
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/* in any event, return the currently established conventions.
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*/
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return conventions;
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}
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static
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int is_switchar( CHAR flag )
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{
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/* A simple helper function, used to identify the switch character
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* introducing an optional command line argument.
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*/
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return flag == getopt_switchar;
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}
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static
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const CHAR *getopt_match( CHAR lookup, const CHAR *opt_string )
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{
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/* Helper function, used to identify short form options.
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*/
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if( (*opt_string == getopt_pluschar) || (*opt_string == getopt_switchar) )
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++opt_string;
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if( *opt_string == getopt_takes_argument )
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++opt_string;
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do if( lookup == *opt_string ) return opt_string;
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while( *++opt_string );
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return NULL;
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}
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static
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int getopt_match_long( const CHAR *nextchar, const CHAR *optname )
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{
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/* Helper function, used to identify potential matches for
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* long form options.
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*/
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CHAR matchchar;
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while( (matchchar = *nextchar++) && (matchchar == *optname) )
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/*
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* skip over initial substring which DOES match.
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*/
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++optname;
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if( matchchar )
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{
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/* did NOT match the entire argument to an initial substring
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* of a defined option name ...
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*/
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if( matchchar != getopt_arg_assign )
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/*
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* ... and didn't stop at an `=' internal field separator,
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* so this is NOT a possible match.
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*/
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return getopt_no_match;
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/* DID stop at an `=' internal field separator,
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* so this IS a possible match, and what follows is an
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* argument to the possibly matched option.
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*/
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optarg = (char *)(nextchar);
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}
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return *optname
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/*
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* if we DIDN'T match the ENTIRE text of the option name,
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* then it's a possible abbreviated match ...
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*/
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? getopt_abbreviated_match
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/*
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* but if we DID match the entire option name,
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* then it's a DEFINITE EXACT match.
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*/
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: getopt_exact_match;
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}
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static
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int getopt_resolved( int mode, int argc, CHAR *const *argv, int *argind,
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struct option *opt, int index, int *retindex, const CHAR *optstring )
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{
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/* Helper function to establish appropriate return conditions,
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* on resolution of a long form option.
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*/
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if( retindex != NULL )
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*retindex = index;
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/* On return, `optind' should normally refer to the argument, if any,
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* which follows the current one; it is convenient to set this, before
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* checking for the presence of any `optarg'.
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*/
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optind = *argind + 1;
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if( optarg && (opt[index].has_arg == no_argument) )
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/*
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* it is an error for the user to specify an option specific argument
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* with an option which doesn't expect one!
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*/
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return getopt_argerror( mode, "option `%s%s' doesn't accept an argument\n",
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PROGNAME, opt + index, getopt_unknown );
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else if( (optarg == NULL) && (opt[index].has_arg == required_argument) )
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{
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/* similarly, it is an error if no argument is specified
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* with an option which requires one ...
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*/
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if( optind < argc )
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/*
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* ... except that the requirement may be satisfied from
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* the following command line argument, if any ...
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*/
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optarg = argv[*argind = optind++];
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else
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/* so fail this case, only if no such argument exists!
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*/
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return getopt_argerror( mode, "option `%s%s' requires an argument\n",
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PROGNAME, opt + index, getopt_missing_arg( optstring ) );
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}
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/* when the caller has provided a return buffer ...
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*/
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if( opt[index].flag != NULL )
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{
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/* ... then we place the proper return value there,
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* and return a status code of zero ...
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*/
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*(opt[index].flag) = opt[index].val;
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return 0;
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}
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/* ... otherwise, the return value becomes the status code.
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*/
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return opt[index].val;
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}
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static
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int getopt_verify( const CHAR *nextchar, const CHAR *optstring )
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{
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/* Helper function, called by getopt_parse() when invoked
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* by getopt_long_only(), to verify when an unmatched or an
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* ambiguously matched long form option string is valid as
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* a short form option specification.
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*/
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if( ! (nextchar && *nextchar && optstring && *optstring) )
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/*
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* There are no characters to be matched, or there are no
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* valid short form option characters to which they can be
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* matched, so this can never be valid.
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*/
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return 0;
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while( *nextchar )
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{
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/* For each command line character in turn ...
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*/
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const CHAR *test;
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if( (test = getopt_match( *nextchar++, optstring )) == NULL )
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/*
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* ... there is no short form option to match the current
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* candidate, so the entire argument fails.
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*/
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return 0;
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if( test[1] == getopt_takes_argument )
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/*
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* The current candidate is valid, and it matches an option
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* which takes an argument, so this command line argument is
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* a valid short form option specification; accept it.
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*/
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return 1;
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}
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/* If we get to here, then every character in the command line
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* argument was valid as a short form option; accept it.
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*/
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return 1;
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}
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static
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#define getopt_std_args int argc, CHAR *const argv[], const CHAR *optstring
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int getopt_parse( int mode, getopt_std_args, ... )
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{
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/* Common core implementation for ALL `getopt' functions.
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*/
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static int argind = 0;
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static int optbase = 0;
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static const CHAR *nextchar = NULL;
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static int optmark = 0;
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if( (optreset |= (optind < 1)) || (optind < optbase) )
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{
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/* POSIX does not prescribe any definitive mechanism for restarting
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* a `getopt' scan, but some applications may require such capability.
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* We will support it, by allowing the caller to adjust the value of
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* `optind' downwards, (nominally setting it to zero). Since POSIX
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* wants `optind' to have an initial value of one, but we want all
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* of our internal place holders to be initialised to zero, when we
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* are called for the first time, we will handle such a reset by
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* adjusting all of the internal place holders to one less than
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* the adjusted `optind' value, (but never to less than zero).
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*/
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if( optreset )
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{
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/* User has explicitly requested reinitialisation...
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* We need to reset `optind' to it's normal initial value of 1,
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* to avoid a potential infinitely recursive loop; by doing this
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* up front, we also ensure that the remaining place holders
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* will be correctly reinitialised to no less than zero.
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*/
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optind = 1;
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/* We also need to clear the `optreset' request...
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*/
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optreset = 0;
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}
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/* Now, we may safely reinitialise the internal place holders, to
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* one less than `optind', without fear of making them negative.
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*/
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optmark = optbase = argind = optind - 1;
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nextchar = NULL;
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}
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/* From a POSIX perspective, the following is `undefined behaviour';
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* we implement it thus, for compatibility with GNU and BSD getopt.
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*/
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else if( optind > (argind + 1) )
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{
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/* Some applications expect to be able to manipulate `optind',
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* causing `getopt' to skip over one or more elements of `argv';
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* POSIX doesn't require us to support this brain-damaged concept;
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* (indeed, POSIX defines no particular behaviour, in the event of
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* such usage, so it must be considered a bug for an application
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|
* to rely on any particular outcome); nonetheless, Mac-OS-X and
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|
* BSD actually provide *documented* support for this capability,
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|
* so we ensure that our internal place holders keep track of
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* external `optind' increments; (`argind' must lag by one).
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*/
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argind = optind - 1;
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|
|
/* When `optind' is misused, in this fashion, we also abandon any
|
|
* residual text in the argument we had been parsing; this is done
|
|
* without any further processing of such abandoned text, assuming
|
|
* that the caller is equipped to handle it appropriately.
|
|
*/
|
|
nextchar = NULL;
|
|
}
|
|
|
|
if( nextchar && *nextchar )
|
|
{
|
|
/* we are parsing a standard, or short format, option argument ...
|
|
*/
|
|
const CHAR *optchar;
|
|
if( (optchar = getopt_match( optopt = *nextchar++, optstring )) != NULL )
|
|
{
|
|
/* we have identified it as valid ...
|
|
*/
|
|
if( optchar[1] == getopt_takes_argument )
|
|
{
|
|
/* and determined that it requires an associated argument ...
|
|
*/
|
|
if( ! *(optarg = (char *)(nextchar)) )
|
|
{
|
|
/* the argument is NOT attached ...
|
|
*/
|
|
if( optchar[2] == getopt_takes_argument )
|
|
/*
|
|
* but this GNU extension marks it as optional,
|
|
* so we don't provide one on this occasion.
|
|
*/
|
|
optarg = NULL;
|
|
|
|
/* otherwise this option takes a mandatory argument,
|
|
* so, provided there is one available ...
|
|
*/
|
|
else if( (argc - argind) > 1 )
|
|
/*
|
|
* we take the following command line argument,
|
|
* as the appropriate option argument.
|
|
*/
|
|
optarg = argv[++argind];
|
|
|
|
/* but if no further argument is available,
|
|
* then there is nothing we can do, except for
|
|
* issuing the requisite diagnostic message.
|
|
*/
|
|
else
|
|
{
|
|
complain( "option requires an argument -- %c", optopt );
|
|
return getopt_missing_arg( optstring );
|
|
}
|
|
}
|
|
optind = argind + 1;
|
|
nextchar = NULL;
|
|
}
|
|
else
|
|
optarg = NULL;
|
|
optind = (nextchar && *nextchar) ? argind : argind + 1;
|
|
return optopt;
|
|
}
|
|
/* if we didn't find a valid match for the specified option character,
|
|
* then we fall through to here, so take appropriate diagnostic action.
|
|
*/
|
|
if( mode == getopt_mode_long_only )
|
|
{
|
|
complain( "unrecognised option `-%s'", --nextchar );
|
|
nextchar = NULL;
|
|
optopt = 0;
|
|
}
|
|
else
|
|
complain( "invalid option -- %c", optopt );
|
|
optind = (nextchar && *nextchar) ? argind : argind + 1;
|
|
return getopt_unknown;
|
|
}
|
|
|
|
if( optmark > optbase )
|
|
{
|
|
/* This can happen, in GNU parsing mode ONLY, when we have
|
|
* skipped over non-option arguments, and found a subsequent
|
|
* option argument; in this case we permute the arguments.
|
|
*/
|
|
int index;
|
|
/*
|
|
* `optspan' specifies the number of contiguous arguments
|
|
* which are spanned by the current option, and so must be
|
|
* moved together during permutation.
|
|
*/
|
|
const int optspan = argind - optmark + 1;
|
|
/*
|
|
* we use `this_arg' to store these temporarily.
|
|
*/
|
|
CHAR **this_arg = malloc(sizeof(CHAR*) * optspan);
|
|
/*
|
|
* we cannot manipulate `argv' directly, since the `getopt'
|
|
* API prototypes it as `read-only'; this cast to `arglist'
|
|
* allows us to work around that restriction.
|
|
*/
|
|
CHAR **arglist = (char **)(argv);
|
|
|
|
/* save temporary copies of the arguments which are associated
|
|
* with the current option ...
|
|
*/
|
|
for( index = 0; index < optspan; ++index )
|
|
this_arg[index] = arglist[optmark + index];
|
|
|
|
/* move all preceding non-option arguments to the right,
|
|
* overwriting these saved arguments, while making space
|
|
* to replace them in their permuted location.
|
|
*/
|
|
for( --optmark; optmark >= optbase; --optmark )
|
|
arglist[optmark + optspan] = arglist[optmark];
|
|
|
|
/* restore the temporarily saved option arguments to
|
|
* their permuted location.
|
|
*/
|
|
for( index = 0; index < optspan; ++index )
|
|
arglist[optbase + index] = this_arg[index];
|
|
|
|
/* adjust `optbase', to account for the relocated option.
|
|
*/
|
|
optbase += optspan;
|
|
|
|
free(this_arg);
|
|
}
|
|
|
|
else
|
|
/* no permutation occurred ...
|
|
* simply adjust `optbase' for all options parsed so far.
|
|
*/
|
|
optbase = argind + 1;
|
|
|
|
/* enter main parsing loop ...
|
|
*/
|
|
while( argc > ++argind )
|
|
{
|
|
/* inspect each argument in turn, identifying possible options ...
|
|
*/
|
|
if( is_switchar( *(nextchar = argv[optmark = argind]) ) && *++nextchar )
|
|
{
|
|
/* we've found a candidate option argument ... */
|
|
|
|
if( is_switchar( *nextchar ) )
|
|
{
|
|
/* it's a double hyphen argument ... */
|
|
|
|
const CHAR *refchar = nextchar;
|
|
if( *++refchar )
|
|
{
|
|
/* and it looks like a long format option ...
|
|
* `getopt_long' mode must be active to accept it as such,
|
|
* `getopt_long_only' also qualifies, but we must downgrade
|
|
* it to force explicit handling as a long format option.
|
|
*/
|
|
if( mode >= getopt_mode_long )
|
|
{
|
|
nextchar = refchar;
|
|
mode = getopt_mode_long;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* this is an explicit `--' end of options marker, so wrap up now!
|
|
*/
|
|
if( optmark > optbase )
|
|
{
|
|
/* permuting the argument list as necessary ...
|
|
* (note use of `this_arg' and `arglist', as above).
|
|
*/
|
|
CHAR *this_arg = argv[optmark];
|
|
CHAR **arglist = (CHAR **)(argv);
|
|
|
|
/* move all preceding non-option arguments to the right ...
|
|
*/
|
|
do arglist[optmark] = arglist[optmark - 1];
|
|
while( optmark-- > optbase );
|
|
|
|
/* reinstate the `--' marker, in its permuted location.
|
|
*/
|
|
arglist[optbase] = this_arg;
|
|
}
|
|
/* ... before finally bumping `optbase' past the `--' marker,
|
|
* and returning the `all done' completion indicator.
|
|
*/
|
|
optind = ++optbase;
|
|
return getopt_all_done;
|
|
}
|
|
}
|
|
else if( mode < getopt_mode_long_only )
|
|
{
|
|
/* it's not an explicit long option, and `getopt_long_only' isn't active,
|
|
* so we must explicitly try to match it as a short option.
|
|
*/
|
|
mode = getopt_mode_standard;
|
|
}
|
|
|
|
if( mode >= getopt_mode_long )
|
|
{
|
|
/* the current argument is a long form option, (either explicitly,
|
|
* introduced by a double hyphen, or implicitly because we were called
|
|
* by `getopt_long_only'); this is where we parse it.
|
|
*/
|
|
int lookup;
|
|
int matched = -1;
|
|
|
|
/* we need to fetch the `extra' function arguments, which are
|
|
* specified for the `getopt_long' APIs.
|
|
*/
|
|
va_list refptr;
|
|
struct option *longopts;
|
|
int *optindex;
|
|
va_start( refptr, optstring );
|
|
longopts = va_arg( refptr, struct option * );
|
|
optindex = va_arg( refptr, int * );
|
|
va_end( refptr );
|
|
|
|
/* ensuring that `optarg' does not inherit any junk, from parsing
|
|
* preceding arguments ...
|
|
*/
|
|
optarg = NULL;
|
|
for( lookup = 0; longopts && longopts[lookup].name; ++lookup )
|
|
{
|
|
/* scan the list of defined long form options ...
|
|
*/
|
|
switch( getopt_match_long( nextchar, longopts[lookup].name ) )
|
|
{
|
|
/* looking for possible matches for the current argument.
|
|
*/
|
|
case getopt_exact_match:
|
|
/*
|
|
* when an exact match is found,
|
|
* return it immediately, setting `nextchar' to NULL,
|
|
* to ensure we don't mistakenly try to match any
|
|
* subsequent characters as short form options.
|
|
*/
|
|
nextchar = NULL;
|
|
return getopt_resolved( mode, argc, argv, &argind,
|
|
longopts, lookup, optindex, optstring );
|
|
|
|
case getopt_abbreviated_match:
|
|
/*
|
|
* but, for a partial (initial substring) match ...
|
|
*/
|
|
if( matched >= 0 )
|
|
{
|
|
/* if this is not the first, then we have an ambiguity ...
|
|
*/
|
|
if( (mode == getopt_mode_long_only)
|
|
/*
|
|
* However, in the case of getopt_long_only(), if
|
|
* the entire ambiguously matched string represents
|
|
* a valid short option specification, then we may
|
|
* proceed to interpret it as such.
|
|
*/
|
|
&& getopt_verify( nextchar, optstring ) )
|
|
return getopt_parse( mode, argc, argv, optstring );
|
|
|
|
/* If we get to here, then the ambiguously matched
|
|
* partial long option isn't valid for short option
|
|
* evaluation; reset parser context to resume with
|
|
* the following command line argument, diagnose
|
|
* ambiguity, and bail out.
|
|
*/
|
|
optopt = 0;
|
|
nextchar = NULL;
|
|
optind = argind + 1;
|
|
complain( "option `%s' is ambiguous", argv[argind] );
|
|
return getopt_unknown;
|
|
}
|
|
/* otherwise just note that we've found a possible match ...
|
|
*/
|
|
matched = lookup;
|
|
}
|
|
}
|
|
if( matched >= 0 )
|
|
{
|
|
/* if we get to here, then we found exactly one partial match,
|
|
* so return it, as for an exact match.
|
|
*/
|
|
nextchar = NULL;
|
|
return getopt_resolved( mode, argc, argv, &argind,
|
|
longopts, matched, optindex, optstring );
|
|
}
|
|
/* if here, then we had what SHOULD have been a long form option,
|
|
* but it is unmatched ...
|
|
*/
|
|
if( (mode < getopt_mode_long_only)
|
|
/*
|
|
* ... although paradoxically, `mode == getopt_mode_long_only'
|
|
* allows us to still try to match it as a short form option.
|
|
*/
|
|
|| (getopt_verify( nextchar, optstring ) == 0) )
|
|
{
|
|
/* When it cannot be matched, reset the parsing context to
|
|
* resume from the next argument, diagnose the failed match,
|
|
* and bail out.
|
|
*/
|
|
optopt = 0;
|
|
nextchar = NULL;
|
|
optind = argind + 1;
|
|
complain( "unrecognised option `%s'", argv[argind] );
|
|
return getopt_unknown;
|
|
}
|
|
}
|
|
/* fall through to handle standard short form options...
|
|
* when the option argument format is neither explictly identified
|
|
* as long, nor implicitly matched as such, and the argument isn't
|
|
* just a bare hyphen, (which isn't an option), then we make one
|
|
* recursive call to explicitly interpret it as short format.
|
|
*/
|
|
if( *nextchar )
|
|
return getopt_parse( mode, argc, argv, optstring );
|
|
}
|
|
/* if we get to here, then we've parsed a non-option argument ...
|
|
* in GNU compatibility mode, we step over it, so we can permute
|
|
* any subsequent option arguments, but ...
|
|
*/
|
|
if( *optstring == getopt_switchar )
|
|
{
|
|
/* if `optstring' begins with a `-' character, this special
|
|
* GNU specific behaviour requires us to return the non-option
|
|
* arguments in strict order, as pseudo-arguments to a special
|
|
* option, with return value defined as `getopt_ordered'.
|
|
*/
|
|
nextchar = NULL;
|
|
optind = argind + 1;
|
|
optarg = argv[argind];
|
|
return getopt_ordered;
|
|
}
|
|
if( getopt_conventions( *optstring ) & getopt_posixly_correct )
|
|
/*
|
|
* otherwise ...
|
|
* for POSIXLY_CORRECT behaviour, or if `optstring' begins with
|
|
* a `+' character, then we break out of the parsing loop, so that
|
|
* the scan ends at the current argument, with no permutation.
|
|
*/
|
|
break;
|
|
}
|
|
/* fall through when all arguments have been evaluated,
|
|
*/
|
|
optind = optbase;
|
|
return getopt_all_done;
|
|
}
|
|
|
|
/* All three public API entry points are trivially defined,
|
|
* in terms of the internal `getopt_parse' function.
|
|
*/
|
|
int getopt( getopt_std_args )
|
|
{
|
|
return getopt_parse( getopt_mode_standard, argc, argv, optstring );
|
|
}
|
|
|
|
int getopt_long( getopt_std_args, const struct option *opts, int *index )
|
|
{
|
|
return getopt_parse( getopt_mode_long, argc, argv, optstring, opts, index );
|
|
}
|
|
|
|
int getopt_long_only( getopt_std_args, const struct option *opts, int *index )
|
|
{
|
|
return getopt_parse( getopt_mode_long_only, argc, argv, optstring, opts, index );
|
|
}
|
|
|
|
#ifdef __weak_alias
|
|
/*
|
|
* These Microsnot style uglified aliases are provided for compatibility
|
|
* with the previous MinGW implementation of the getopt API.
|
|
*/
|
|
__weak_alias( getopt, _getopt )
|
|
__weak_alias( getopt_long, _getopt_long )
|
|
__weak_alias( getopt_long_only, _getopt_long_only )
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* !defined(__UNISTD_H_SOURCED__) && !defined(__GETOPT_LONG_H__) */
|