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/*-
* Copyright (c) 2002 Tim J. Robbins
* All rights reserved.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "collate.h"
static char *__mbsdup(const wchar_t *);
/*
* Placeholder implementation of wcscoll(). Attempts to use the single-byte
* collation ordering where possible, and falls back on wcscmp() in locales
* with extended character sets.
*/
int
wcscoll(const wchar_t *ws1, const wchar_t *ws2)
{
char *mbs1, *mbs2;
int diff, sverrno;
if (__collate_load_error || MB_CUR_MAX > 1)
/*
* Locale has no special collating order, could not be
* loaded, or has an extended character set; do a fast binary
* comparison.
*/
return (wcscmp(ws1, ws2));
if ((mbs1 = __mbsdup(ws1)) == NULL || (mbs2 = __mbsdup(ws2)) == NULL) {
/*
* Out of memory or illegal wide chars; fall back to wcscmp()
* but leave errno indicating the error. Callers that don't
* check for error will get a reasonable but often slightly
* incorrect result.
*/
sverrno = errno;
free(mbs1);
errno = sverrno;
return (wcscmp(ws1, ws2));
}
diff = strcoll(mbs1, mbs2);
sverrno = errno;
free(mbs1);
free(mbs2);
errno = sverrno;
return (diff);
}
static char *
__mbsdup(const wchar_t *ws)
{
static const mbstate_t initial;
mbstate_t st;
const wchar_t *wcp;
size_t len;
char *mbs;
wcp = ws;
st = initial;
if ((len = wcsrtombs(NULL, &wcp, 0, &st)) == (size_t)-1)
return (NULL);
if ((mbs = malloc(len + 1)) == NULL)
return (NULL);
st = initial;
wcsrtombs(mbs, &ws, len + 1, &st);
return (mbs);
}
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