/* Define PATH_MAX somehow.  Requires sys/types.h.

   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2020 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 3, 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, see <https://www.gnu.org/licenses/>.  */

#ifndef _PATHMAX_H

# define _PATHMAX_H

/* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename,

   including the terminating NUL byte.

   <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>

   PATH_MAX is not defined on systems which have no limit on filename length,

   such as GNU/Hurd.

   This file does *not* define PATH_MAX always.  Programs that use this file

   can handle the GNU/Hurd case in several ways:

     - Either with a package-wide handling, or with a per-file handling,

     - Either through a

         #ifdef PATH_MAX

       or through a fallback like

         #ifndef PATH_MAX

         # define PATH_MAX 8192

         #endif

       or through a fallback like

         #ifndef PATH_MAX

         # define PATH_MAX pathconf ("/", _PC_PATH_MAX)

         #endif

 */

# include <unistd.h>

# include <limits.h>

# ifndef _POSIX_PATH_MAX

#  define _POSIX_PATH_MAX 256

# endif

/* Don't include sys/param.h if it already has been.  */

# if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN

#  include <sys/param.h>

# endif

# if !defined PATH_MAX && defined MAXPATHLEN

#  define PATH_MAX MAXPATHLEN

# endif

# ifdef __hpux

/* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename,

   *not* including the terminating NUL byte, and is set to 1023.

   Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is

   not defined at all any more.  */

#  undef PATH_MAX

#  define PATH_MAX 1024

# endif

# if defined _WIN32 && ! defined __CYGWIN__

/* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com,

   section "Maximum Path Length Limitation",

   <https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation>

   explains that the maximum size of a filename, including the terminating

   NUL byte, is 260 = 3 + 256 + 1.

   This is the same value as

     - FILENAME_MAX in <stdio.h>,

     - _MAX_PATH in <stdlib.h>,

     - MAX_PATH in <windef.h>.

   Undefine the original value, because mingw's <limits.h> gets it wrong.  */

#  undef PATH_MAX

#  define PATH_MAX 260

# endif

#endif /* _PATHMAX_H */