/* Declarations for getopt.

Copyright (C) 1989-1994, 1996-1999, 2001 Free Software Foundation, Inc.

This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with the GNU C Library; if not, write to the Free

Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

02111-1307 USA. */

#ifndef _GETOPT_H

#ifndef __need_getopt

# define _GETOPT_H 1

#endif

/* If __GNU_LIBRARY__ is not already defined, either we are being used

standalone, or this is the first header included in the source file.

If we are being used with glibc, we need to include <features.h>, but

that does not exist if we are standalone. So: if __GNU_LIBRARY__ is

not defined, include <ctype.h>, which will pull in <features.h> for us

if it's from glibc. (Why ctype.h? It's guaranteed to exist and it

doesn't flood the namespace with stuff the way some other headers do.) */

#if !defined __GNU_LIBRARY__

# include <ctype.h>

#endif

#ifdef __cplusplus

extern "C" {

#endif

/* For communication from `getopt' to the caller.

When `getopt' finds an option that takes an argument,

the argument value is returned here.

Also, when `ordering' is RETURN_IN_ORDER,

each non-option ARGV-element is returned here. */

extern char *optarg;

/* Index in ARGV of the next element to be scanned.

This is used for communication to and from the caller

and for communication between successive calls to `getopt'.

On entry to `getopt', zero means this is the first call; initialize.

When `getopt' returns -1, this is the index of the first of the

non-option elements that the caller should itself scan.

Otherwise, `optind' communicates from one call to the next

how much of ARGV has been scanned so far. */

extern int optind;

/* Callers store zero here to inhibit the error message `getopt' prints

for unrecognized options. */

extern int opterr;

/* Set to an option character which was unrecognized. */

extern int optopt;

#ifndef __need_getopt

/* Describe the long-named options requested by the application.

The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector

of `struct option' terminated by an element containing a name which is

zero.

The field `has_arg' is:

no_argument (or 0) if the option does not take an argument,

required_argument (or 1) if the option requires an argument,

optional_argument (or 2) if the option takes an optional argument.

If the field `flag' is not NULL, it points to a variable that is set

to the value given in the field `val' when the option is found, but

left unchanged if the option is not found.

To have a long-named option do something other than set an `int' to

a compiled-in constant, such as set a value from `optarg', set the

option's `flag' field to zero and its `val' field to a nonzero

value (the equivalent single-letter option character, if there is

one). For long options that have a zero `flag' field, `getopt'

returns the contents of the `val' field. */

struct option

};

/* Names for the values of the `has_arg' field of `struct option'. */

# define no_argument 0

# define required_argument 1

# define optional_argument 2

#endif /* need getopt */

/* Get definitions and prototypes for functions to process the

arguments in ARGV (ARGC of them, minus the program name) for

options given in OPTS.

Return the option character from OPTS just read. Return -1 when

there are no more options. For unrecognized options, or options

missing arguments, `optopt' is set to the option letter, and '?' is

returned.

The OPTS string is a list of characters which are recognized option

letters, optionally followed by colons, specifying that that letter

takes an argument, to be placed in `optarg'.

If a letter in OPTS is followed by two colons, its argument is

optional. This behavior is specific to the GNU `getopt'.

The argument `--' causes premature termination of argument

scanning, explicitly telling `getopt' that there are no more

options.

If OPTS begins with `--', then non-option arguments are treated as

arguments to the option '\0'. This behavior is specific to the GNU

`getopt'. */

#if (defined __STDC__ && __STDC__) || defined __cplusplus

# ifdef __GNU_LIBRARY__

/* Many other libraries have conflicting prototypes for getopt, with

differences in the consts, in stdlib.h. To avoid compilation

errors, only prototype getopt for the GNU C library. */

extern int getopt (int ___argc, char *const *___argv, const char *__shortopts);

# else /* not __GNU_LIBRARY__ */

extern int getopt ();

# endif /* __GNU_LIBRARY__ */

# ifndef __need_getopt

extern int getopt_long (int ___argc, char *const *___argv,

const char *__shortopts,

const struct option *__longopts, int *__longind);

extern int getopt_long_only (int ___argc, char *const *___argv,

const char *__shortopts,

const struct option *__longopts, int *__longind);

/* Internal only. Users should not call this directly. */

extern int _getopt_internal (int ___argc, char *const *___argv,

const char *__shortopts,

const struct option *__longopts, int *__longind,

int __long_only);

# endif

#else /* not __STDC__ */

extern int getopt ();

# ifndef __need_getopt

extern int getopt_long ();

extern int getopt_long_only ();

extern int _getopt_internal ();

# endif

#endif /* __STDC__ */

#ifdef __cplusplus

}

#endif

/* Make sure we later can get all the definitions and declarations. */

#undef __need_getopt

#endif /* getopt.h */