Undo previous change, then add comment as to why the

[bison.git] / lib / get-errno.c

/* get-errno.h - get and set errno.

   Copyright (C) 2002 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,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* Written by Paul Eggert.  */

#if HAVE_CONFIG_H
# include <config.h>
#endif

#include <errno.h>

#include "get-errno.h"

/* Get and set errno.  A source file that needs to set or get errno,
   but doesn't need to test for specific errno values, can use these
   functions to avoid namespace pollution.  For example, a file that
   defines EQUAL should not include <errno.h>, since <errno.h> might
   define EQUAL; such a file can include <get-errno.h> instead.  */

int
get_errno (void)
{
  return errno;
}

void
set_errno (int e)
{
  errno = e;
}