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/* $OpenBSD: duplocale.c,v 1.1 2017/09/05 03:16:13 schwarze Exp $ */
/*
* Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <locale.h>
#include "rune.h"
locale_t
duplocale(locale_t oldloc)
{
if (oldloc == _LOCALE_UTF8 && _Utf8RuneLocale != NULL)
return _LOCALE_UTF8;
if (oldloc == _LOCALE_C)
return _LOCALE_C;
if (oldloc == LC_GLOBAL_LOCALE)
return _GlobalRuneLocale == _Utf8RuneLocale ?
_LOCALE_UTF8 : _LOCALE_C;
/* POSIX says: invalid input -> undefined behaviour. */
errno = EINVAL;
return _LOCALE_NONE;
}
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