1/*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "Collator.h"
31
32#if USE(ICU_UNICODE) && !UCONFIG_NO_COLLATION
33
34#include "Assertions.h"
35#include "Threading.h"
36#include <unicode/ucol.h>
37#include <string.h>
38
39#if OS(DARWIN)
40#include "RetainPtr.h"
41#include <CoreFoundation/CoreFoundation.h>
42#endif
43
44namespace WTF {
45
46static UCollator* cachedCollator;
47static Mutex& cachedCollatorMutex()
48{
49 AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
50 return mutex;
51}
52
53Collator::Collator(const char* locale)
54 : m_collator(0)
55 , m_locale(locale ? strdup(locale) : 0)
56 , m_lowerFirst(false)
57{
58}
59
60std::auto_ptr<Collator> Collator::userDefault()
61{
62#if OS(DARWIN) && PLATFORM(CF)
63 // Mac OS X doesn't set UNIX locale to match user-selected one, so ICU default doesn't work.
64#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !OS(IPHONE_OS)
65 RetainPtr<CFLocaleRef> currentLocale(AdoptCF, CFLocaleCopyCurrent());
66 CFStringRef collationOrder = (CFStringRef)CFLocaleGetValue(currentLocale.get(), kCFLocaleCollatorIdentifier);
67#else
68 RetainPtr<CFStringRef> collationOrderRetainer(AdoptCF, (CFStringRef)CFPreferencesCopyValue(CFSTR("AppleCollationOrder"), kCFPreferencesAnyApplication, kCFPreferencesCurrentUser, kCFPreferencesAnyHost));
69 CFStringRef collationOrder = collationOrderRetainer.get();
70#endif
71 char buf[256];
72 if (collationOrder) {
73 CFStringGetCString(collationOrder, buf, sizeof(buf), kCFStringEncodingASCII);
74 return std::auto_ptr<Collator>(new Collator(buf));
75 } else
76 return std::auto_ptr<Collator>(new Collator(""));
77#else
78 return std::auto_ptr<Collator>(new Collator(0));
79#endif
80}
81
82Collator::~Collator()
83{
84 releaseCollator();
85 free(m_locale);
86}
87
88void Collator::setOrderLowerFirst(bool lowerFirst)
89{
90 m_lowerFirst = lowerFirst;
91}
92
93Collator::Result Collator::collate(const UChar* lhs, size_t lhsLength, const UChar* rhs, size_t rhsLength) const
94{
95 if (!m_collator)
96 createCollator();
97
98 return static_cast<Result>(ucol_strcoll(m_collator, lhs, lhsLength, rhs, rhsLength));
99}
100
101void Collator::createCollator() const
102{
103 ASSERT(!m_collator);
104 UErrorCode status = U_ZERO_ERROR;
105
106 {
107 Locker<Mutex> lock(cachedCollatorMutex());
108 if (cachedCollator) {
109 const char* cachedCollatorLocale = ucol_getLocaleByType(cachedCollator, ULOC_REQUESTED_LOCALE, &status);
110 ASSERT(U_SUCCESS(status));
111 ASSERT(cachedCollatorLocale);
112
113 UColAttributeValue cachedCollatorLowerFirst = ucol_getAttribute(cachedCollator, UCOL_CASE_FIRST, &status);
114 ASSERT(U_SUCCESS(status));
115
116 // FIXME: default locale is never matched, because ucol_getLocaleByType returns the actual one used, not 0.
117 if (m_locale && 0 == strcmp(cachedCollatorLocale, m_locale)
118 && ((UCOL_LOWER_FIRST == cachedCollatorLowerFirst && m_lowerFirst) || (UCOL_UPPER_FIRST == cachedCollatorLowerFirst && !m_lowerFirst))) {
119 m_collator = cachedCollator;
120 cachedCollator = 0;
121 return;
122 }
123 }
124 }
125
126 m_collator = ucol_open(m_locale, &status);
127 if (U_FAILURE(status)) {
128 status = U_ZERO_ERROR;
129 m_collator = ucol_open("", &status); // Fallback to Unicode Collation Algorithm.
130 }
131 ASSERT(U_SUCCESS(status));
132
133 ucol_setAttribute(m_collator, UCOL_CASE_FIRST, m_lowerFirst ? UCOL_LOWER_FIRST : UCOL_UPPER_FIRST, &status);
134 ASSERT(U_SUCCESS(status));
135}
136
137void Collator::releaseCollator()
138{
139 {
140 Locker<Mutex> lock(cachedCollatorMutex());
141 if (cachedCollator)
142 ucol_close(cachedCollator);
143 cachedCollator = m_collator;
144 m_collator = 0;
145 }
146}
147
148}
149
150#endif
151

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/wtf/unicode/icu/CollatorICU.cpp