 /* Declarations for getopt.
    Copyright (C) 1989,90,91,92,93,94,96,97 Free Software Foundation, Inc.
 
 NOTE: The canonical source of this file is maintained with the GNU C Library.
 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
 
 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, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
 USA.  */
 
 #ifndef _GETOPT_H
 #define _GETOPT_H 1
 
 #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.  */
 
 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;
 
 /* 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__
   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
 
 #if defined (__STDC__) && __STDC__
 #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__ */
 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);
 #else /* not __STDC__ */
 extern int getopt ();
 extern int getopt_long ();
 extern int getopt_long_only ();
 
 extern int _getopt_internal ();
 #endif /* __STDC__ */
 
 #ifdef  __cplusplus
 }
 #endif
 
 #endif /* _GETOPT_H */
