/* Copyright (C) 2007-2018 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, see

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

#include <libintl.h>

#include <locale.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/param.h>

#include <libc-symbols.h>

static __thread char *last_value;

static const char *

translate (const char *str, locale_t loc)

{

  locale_t oldloc = __uselocale (loc);

  const char *res = _(str);

  __uselocale (oldloc);

  return res;

}

/* Return a string describing the errno code in ERRNUM.  */

char *

strerror_l (int errnum, locale_t loc)

{

  if (__builtin_expect (errnum < 0 || errnum >= _sys_nerr_internal

			|| _sys_errlist_internal[errnum] == NULL, 0))

    {

      free (last_value);

      if (__asprintf (&last_value, "%s%d",

		      translate ("Unknown error ", loc), errnum) == -1)

	last_value = NULL;

      return last_value;

    }

  return (char *) translate (_sys_errlist_internal[errnum], loc);

}

void

__strerror_thread_freeres (void)

{

  free (last_value);

}

text_set_element (__libc_subfreeres, __strerror_thread_freeres);