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/*-
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2002 Tim J. Robbins
* 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 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"
int
wcscoll_l(const wchar_t *ws1, const wchar_t *ws2, locale_t locale)
{
int len1, len2, pri1, pri2, ret;
wchar_t *tr1 = NULL, *tr2 = NULL;
int direc, pass;
FIX_LOCALE(locale);
struct xlocale_collate *table =
(struct xlocale_collate*)locale->components[XLC_COLLATE];
if (table->__collate_load_error)
/*
* Locale has no special collating order or could not be
* loaded, do a fast binary comparison.
*/
return (wcscmp(ws1, ws2));
ret = 0;
/*
* Once upon a time we had code to try to optimize this, but
* it turns out that you really can't make many assumptions
* safely. You absolutely have to run this pass by pass,
* because some passes will be ignored for a given character,
* while others will not. Simpler locales will benefit from
* having fewer passes, and most comparisons should resolve
* during the primary pass anyway.
*
* Note that we do one final extra pass at the end to pick
* up UNDEFINED elements. There is special handling for them.
*/
for (pass = 0; pass <= table->info->directive_count; pass++) {
const int32_t *st1 = NULL;
const int32_t *st2 = NULL;
const wchar_t *w1 = ws1;
const wchar_t *w2 = ws2;
int check1, check2;
/* special pass for UNDEFINED */
if (pass == table->info->directive_count) {
direc = DIRECTIVE_FORWARD | DIRECTIVE_UNDEFINED;
} else {
direc = table->info->directive[pass];
}
if (direc & DIRECTIVE_BACKWARD) {
wchar_t *bp, *fp, c;
if ((tr1 = wcsdup(w1)) == NULL)
goto fail;
bp = tr1;
fp = tr1 + wcslen(tr1) - 1;
while (bp < fp) {
c = *bp;
*bp++ = *fp;
*fp-- = c;
}
if ((tr2 = wcsdup(w2)) == NULL)
goto fail;
bp = tr2;
fp = tr2 + wcslen(tr2) - 1;
while (bp < fp) {
c = *bp;
*bp++ = *fp;
*fp-- = c;
}
w1 = tr1;
w2 = tr2;
}
if (direc & DIRECTIVE_POSITION) {
while (*w1 && *w2) {
pri1 = pri2 = 0;
check1 = check2 = 1;
while ((pri1 == pri2) && (check1 || check2)) {
if (check1) {
_collate_lookup(table, w1, &len1,
&pri1, pass, &st1);
if (pri1 < 0) {
errno = EINVAL;
goto fail;
}
if (!pri1) {
pri1 = COLLATE_MAX_PRIORITY;
st1 = NULL;
}
check1 = (st1 != NULL);
}
if (check2) {
_collate_lookup(table, w2, &len2,
&pri2, pass, &st2);
if (pri2 < 0) {
errno = EINVAL;
goto fail;
}
if (!pri2) {
pri2 = COLLATE_MAX_PRIORITY;
st2 = NULL;
}
check2 = (st2 != NULL);
}
}
if (pri1 != pri2) {
ret = pri1 - pri2;
goto end;
}
w1 += len1;
w2 += len2;
}
} else {
while (*w1 && *w2) {
pri1 = pri2 = 0;
check1 = check2 = 1;
while ((pri1 == pri2) && (check1 || check2)) {
while (check1 && *w1) {
_collate_lookup(table, w1,
&len1, &pri1, pass, &st1);
if (pri1 > 0)
break;
if (pri1 < 0) {
errno = EINVAL;
goto fail;
}
st1 = NULL;
w1 += 1;
}
check1 = (st1 != NULL);
while (check2 && *w2) {
_collate_lookup(table, w2,
&len2, &pri2, pass, &st2);
if (pri2 > 0)
break;
if (pri2 < 0) {
errno = EINVAL;
goto fail;
}
st2 = NULL;
w2 += 1;
}
check2 = (st2 != NULL);
if (!pri1 || !pri2)
break;
}
if (!pri1 || !pri2)
break;
if (pri1 != pri2) {
ret = pri1 - pri2;
goto end;
}
w1 += len1;
w2 += len2;
}
}
if (!*w1) {
if (*w2) {
ret = -(int)*w2;
goto end;
}
} else {
ret = *w1;
goto end;
}
}
ret = 0;
end:
free(tr1);
free(tr2);
return (ret);
fail:
ret = wcscmp(ws1, ws2);
goto end;
}
int
wcscoll(const wchar_t *ws1, const wchar_t *ws2)
{
return wcscoll_l(ws1, ws2, __get_locale());
}
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