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* Copyright (C) 2008 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <wtf/unicode/Collator.h>
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#if USE(ICU_UNICODE) && !UCONFIG_NO_COLLATION
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#include <wtf/Assertions.h>
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#include <wtf/StringExtras.h>
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#include <wtf/Threading.h>
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#include <unicode/ucol.h>
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#include <wtf/RetainPtr.h>
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#include <CoreFoundation/CoreFoundation.h>
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static UCollator* cachedCollator;
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static Mutex& cachedCollatorMutex()
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AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
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Collator::Collator(const char* locale)
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, m_locale(locale ? strdup(locale) : 0)
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PassOwnPtr<Collator> Collator::userDefault()
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#if OS(DARWIN) && USE(CF)
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// Mac OS X doesn't set UNIX locale to match user-selected one, so ICU default doesn't work.
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#if !OS(IOS) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
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RetainPtr<CFLocaleRef> currentLocale(AdoptCF, CFLocaleCopyCurrent());
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CFStringRef collationOrder = (CFStringRef)CFLocaleGetValue(currentLocale.get(), kCFLocaleCollatorIdentifier);
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RetainPtr<CFStringRef> collationOrderRetainer(AdoptCF, (CFStringRef)CFPreferencesCopyValue(CFSTR("AppleCollationOrder"), kCFPreferencesAnyApplication, kCFPreferencesCurrentUser, kCFPreferencesAnyHost));
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CFStringRef collationOrder = collationOrderRetainer.get();
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return adoptPtr(new Collator(""));
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CFStringGetCString(collationOrder, buf, sizeof(buf), kCFStringEncodingASCII);
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return adoptPtr(new Collator(buf));
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return adoptPtr(new Collator(0));
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void Collator::setOrderLowerFirst(bool lowerFirst)
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m_lowerFirst = lowerFirst;
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Collator::Result Collator::collate(const UChar* lhs, size_t lhsLength, const UChar* rhs, size_t rhsLength) const
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return static_cast<Result>(ucol_strcoll(m_collator, lhs, lhsLength, rhs, rhsLength));
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void Collator::createCollator() const
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UErrorCode status = U_ZERO_ERROR;
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Locker<Mutex> lock(cachedCollatorMutex());
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if (cachedCollator) {
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const char* cachedCollatorLocale = ucol_getLocaleByType(cachedCollator, ULOC_REQUESTED_LOCALE, &status);
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ASSERT(U_SUCCESS(status));
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ASSERT(cachedCollatorLocale);
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UColAttributeValue cachedCollatorLowerFirst = ucol_getAttribute(cachedCollator, UCOL_CASE_FIRST, &status);
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ASSERT(U_SUCCESS(status));
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// FIXME: default locale is never matched, because ucol_getLocaleByType returns the actual one used, not 0.
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if (m_locale && 0 == strcmp(cachedCollatorLocale, m_locale)
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&& ((UCOL_LOWER_FIRST == cachedCollatorLowerFirst && m_lowerFirst) || (UCOL_UPPER_FIRST == cachedCollatorLowerFirst && !m_lowerFirst))) {
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m_collator = cachedCollator;
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m_collator = ucol_open(m_locale, &status);
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if (U_FAILURE(status)) {
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status = U_ZERO_ERROR;
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m_collator = ucol_open("", &status); // Fallback to Unicode Collation Algorithm.
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ASSERT(U_SUCCESS(status));
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ucol_setAttribute(m_collator, UCOL_CASE_FIRST, m_lowerFirst ? UCOL_LOWER_FIRST : UCOL_UPPER_FIRST, &status);
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ASSERT(U_SUCCESS(status));
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ucol_setAttribute(m_collator, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
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ASSERT(U_SUCCESS(status));
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void Collator::releaseCollator()
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Locker<Mutex> lock(cachedCollatorMutex());
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ucol_close(cachedCollator);
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cachedCollator = m_collator;