myvtm/libtoolkit/getopt.h

/* 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

#include "config.h"

#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.  */

    TOOLKIT_API 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.  */

    TOOLKIT_API int optind;

    /* Callers store zero here to inhibit the error message `getopt' prints
       for unrecognized options.  */

    TOOLKIT_API int opterr;

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

    TOOLKIT_API 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
    {
# if (defined __STDC__ && __STDC__) || defined __cplusplus
        const char* name;
# else
        char* name;
# endif
        /* 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 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.  */
    TOOLKIT_API int getopt(int argc, char* const* argv, const char* __shortopts);
# else /* not __GNU_LIBRARY__ */
    TOOLKIT_API int getopt(int argc, char* const* argv, const char* __shortopts);
# endif /* __GNU_LIBRARY__ */

# ifndef __need_getopt
    TOOLKIT_API int getopt_long(int argc, char* const* argv, const char* __shortopts,
        const struct option* __longopts, int* __longind);
    TOOLKIT_API 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.  */
    int _getopt_internal(int argc, char* const* argv,
        const char* __shortopts,
        const struct option* __longopts, int* __longind,
        int __long_only);
# endif
#else /* not __STDC__ */
    TOOLKIT_API int getopt(int argc, char* const* argv, const char* __shortopts);
# ifndef __need_getopt
	TOOLKIT_API int getopt_long(int argc, char* const* argv, const char* __shortopts,
		const struct option* __longopts, int* __longind);
	TOOLKIT_API int getopt_long_only(int argc, char* const* argv,
		const char* __shortopts,
		const struct option* __longopts, int* __longind);

# endif
#endif /* __STDC__ */

#ifdef	__cplusplus
}
#endif

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

#endif /* getopt.h */