// -*- C++ -*-
/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
     Written by James Clark (jjc@jclark.com)

This file is part of groff.

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

groff 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 <http://www.gnu.org/licenses/>. */

/* file_name_max(dir) does the same as pathconf(dir, _PC_NAME_MAX) */

#include "lib.h"

#include <sys/types.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */

#ifdef _POSIX_VERSION

size_t file_name_max(const char *fname)
{
  return pathconf(fname, _PC_NAME_MAX);
}

#else /* not _POSIX_VERSION */

#ifdef HAVE_DIRENT_H
#include <dirent.h>
#else /* not HAVE_DIRENT_H */
#ifdef HAVE_SYS_DIR_H
#include <sys/dir.h>
#endif /* HAVE_SYS_DIR_H */
#endif /* not HAVE_DIRENT_H */

#ifndef NAME_MAX
#ifdef MAXNAMLEN
#define NAME_MAX MAXNAMLEN
#endif
#endif

#ifndef NAME_MAX
#ifdef MAXNAMELEN
#define NAME_MAX MAXNAMELEN
#endif
#endif

#ifndef NAME_MAX
#include <stdio.h>
#ifdef FILENAME_MAX
#define NAME_MAX FILENAME_MAX
#endif
#endif

#ifndef NAME_MAX
#define NAME_MAX 14
#endif

size_t file_name_max(const char *)
{
  return NAME_MAX;
}

#endif /* not _POSIX_VERSION */