/* Declarations for getopt.

   Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by the

   Free Software Foundation; either version 2, or (at your option) any

   later version.

   This program 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 General Public License for more details.

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

   along with this program; if not, write to the Free Software

   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef __MFX_GETOPT_H

#define __MFX_GETOPT_H 1

#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 *mfx_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 EOF, 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 mfx_optind;

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

   for unrecognized options.  */

extern int mfx_opterr;

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

extern int mfx_optopt;

/* 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 mfx_option

{

  const char *name;

  /* has_arg can't be an enum because some compilers complain about

     type mismatches in all the code that assumes it is an int.  */

  int has_arg;

  int *flag;

  int val;

};

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

#define mfx_no_argument         0

#define mfx_required_argument   1

#define mfx_optional_argument   2

#define mfx_exact_argument      0x10            /* no abbrev. */

int mfx_getopt(int argc, char **argv, const char *shortopts);

int mfx_getopt_long(int argc, char **argv, const char *shortopts,

                    const struct mfx_option *longopts, int *longind);

#ifdef __cplusplus

/* } */

#endif

#endif /* __MFX_GETOPT_H */