freebsd-dev/lib/libc/string/strxfrm.c
Pedro F. Giffuni d915a14ef0 libc: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-25 17:12:48 +00:00

106 lines
3.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
* at Electronni Visti IA, Kiev, Ukraine.
* All rights reserved.
*
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
* Portions of this software were developed by David Chisnall
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <wchar.h>
#include "collate.h"
size_t
strxfrm_l(char * __restrict dest, const char * __restrict src, size_t len, locale_t loc);
size_t
strxfrm(char * __restrict dest, const char * __restrict src, size_t len)
{
return strxfrm_l(dest, src, len, __get_locale());
}
size_t
strxfrm_l(char * __restrict dest, const char * __restrict src, size_t len, locale_t locale)
{
size_t slen;
size_t xlen;
wchar_t *wcs = NULL;
FIX_LOCALE(locale);
struct xlocale_collate *table =
(struct xlocale_collate*)locale->components[XLC_COLLATE];
if (!*src) {
if (len > 0)
*dest = '\0';
return (0);
}
/*
* The conversion from multibyte to wide character strings is
* strictly reducing (one byte of an mbs cannot expand to more
* than one wide character.)
*/
slen = strlen(src);
if (table->__collate_load_error)
goto error;
if ((wcs = malloc((slen + 1) * sizeof (wchar_t))) == NULL)
goto error;
if (mbstowcs_l(wcs, src, slen + 1, locale) == (size_t)-1)
goto error;
if ((xlen = _collate_sxfrm(table, wcs, dest, len)) == (size_t)-1)
goto error;
free(wcs);
if (len > xlen) {
dest[xlen] = 0;
} else if (len) {
dest[len-1] = 0;
}
return (xlen);
error:
/* errno should be set to ENOMEM if malloc failed */
free(wcs);
strlcpy(dest, src, len);
return (slen);
}