author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 11 May 2010 17:13:44 +0300 | |
branch | RCL_3 |
changeset 70 | 8bfb9186a8b8 |
parent 17 | c8a366e56285 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. |
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* Copyright (C) 2006 Alexey Proskuryakov <ap@nypop.com> |
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* |
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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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* are met: |
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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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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* 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 |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include "config.h" |
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#include "TextEncoding.h" |
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#include "CString.h" |
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#include "PlatformString.h" |
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#include "TextCodec.h" |
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#include "TextDecoder.h" |
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#include "TextEncodingRegistry.h" |
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#if USE(ICU_UNICODE) |
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#include <unicode/unorm.h> |
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#elif USE(QT4_UNICODE) |
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#include <QString> |
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#endif |
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#include <wtf/HashSet.h> |
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#include <wtf/OwnPtr.h> |
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namespace WebCore { |
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static void addEncodingName(HashSet<const char*>& set, const char* name) |
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{ |
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const char* atomicName = atomicCanonicalTextEncodingName(name); |
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if (atomicName) |
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set.add(atomicName); |
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} |
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TextEncoding::TextEncoding(const char* name) |
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: m_name(atomicCanonicalTextEncodingName(name)) |
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{ |
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} |
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TextEncoding::TextEncoding(const String& name) |
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: m_name(atomicCanonicalTextEncodingName(name.characters(), name.length())) |
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{ |
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} |
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String TextEncoding::decode(const char* data, size_t length) const |
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{ |
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if (!m_name) |
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return String(); |
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return TextDecoder(*this).decode(data, length, true); |
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} |
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CString TextEncoding::encode(const UChar* characters, size_t length, bool allowEntities) const |
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{ |
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if (!m_name) |
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return CString(); |
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if (!length) |
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return ""; |
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|
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#if USE(ICU_UNICODE) |
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// FIXME: What's the right place to do normalization? |
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// It's a little strange to do it inside the encode function. |
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// Perhaps normalization should be an explicit step done before calling encode. |
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const UChar* source = characters; |
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size_t sourceLength = length; |
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Vector<UChar> normalizedCharacters; |
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UErrorCode err = U_ZERO_ERROR; |
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if (unorm_quickCheck(source, sourceLength, UNORM_NFC, &err) != UNORM_YES) { |
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// First try using the length of the original string, since normalization to NFC rarely increases length. |
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normalizedCharacters.resize(sourceLength); |
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int32_t normalizedLength = unorm_normalize(source, length, UNORM_NFC, 0, normalizedCharacters.data(), length, &err); |
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if (err == U_BUFFER_OVERFLOW_ERROR) { |
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err = U_ZERO_ERROR; |
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normalizedCharacters.resize(normalizedLength); |
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normalizedLength = unorm_normalize(source, length, UNORM_NFC, 0, normalizedCharacters.data(), normalizedLength, &err); |
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} |
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ASSERT(U_SUCCESS(err)); |
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source = normalizedCharacters.data(); |
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sourceLength = normalizedLength; |
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} |
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return newTextCodec(*this)->encode(source, sourceLength, allowEntities); |
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#elif USE(QT4_UNICODE) |
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QString str(reinterpret_cast<const QChar*>(characters), length); |
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str = str.normalized(QString::NormalizationForm_C); |
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return newTextCodec(*this)->encode(reinterpret_cast<const UChar *>(str.utf16()), str.length(), allowEntities); |
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#endif |
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} |
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|
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bool TextEncoding::usesVisualOrdering() const |
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{ |
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if (noExtendedTextEncodingNameUsed()) |
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return false; |
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|
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static const char* const a = atomicCanonicalTextEncodingName("ISO-8859-8"); |
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return m_name == a; |
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} |
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|
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bool TextEncoding::isJapanese() const |
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{ |
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if (noExtendedTextEncodingNameUsed()) |
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return false; |
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|
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static HashSet<const char*> set; |
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if (set.isEmpty()) { |
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addEncodingName(set, "x-mac-japanese"); |
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addEncodingName(set, "cp932"); |
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addEncodingName(set, "JIS_X0201"); |
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addEncodingName(set, "JIS_X0208-1983"); |
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addEncodingName(set, "JIS_X0208-1990"); |
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addEncodingName(set, "JIS_X0212-1990"); |
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addEncodingName(set, "JIS_C6226-1978"); |
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addEncodingName(set, "Shift_JIS_X0213-2000"); |
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addEncodingName(set, "ISO-2022-JP"); |
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addEncodingName(set, "ISO-2022-JP-2"); |
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addEncodingName(set, "ISO-2022-JP-1"); |
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addEncodingName(set, "ISO-2022-JP-3"); |
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addEncodingName(set, "EUC-JP"); |
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addEncodingName(set, "Shift_JIS"); |
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} |
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return m_name && set.contains(m_name); |
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} |
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144 |
|
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UChar TextEncoding::backslashAsCurrencySymbol() const |
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{ |
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if (noExtendedTextEncodingNameUsed()) |
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return '\\'; |
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149 |
|
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// The text encodings below treat backslash as a currency symbol. |
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// See http://blogs.msdn.com/michkap/archive/2005/09/17/469941.aspx for more information. |
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static const char* const a = atomicCanonicalTextEncodingName("Shift_JIS_X0213-2000"); |
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static const char* const b = atomicCanonicalTextEncodingName("EUC-JP"); |
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return (m_name == a || m_name == b) ? 0x00A5 : '\\'; |
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} |
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|
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const TextEncoding& TextEncoding::closest8BitEquivalent() const |
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{ |
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if (*this == UTF16BigEndianEncoding() || *this == UTF16LittleEndianEncoding()) |
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return UTF8Encoding(); |
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return *this; |
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} |
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163 |
|
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static TextEncoding* globalASCIIEncoding; |
0
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const TextEncoding& ASCIIEncoding() |
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{ |
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if( !globalASCIIEncoding ) { |
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globalASCIIEncoding = new TextEncoding("ASCII"); |
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} |
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return *globalASCIIEncoding; |
0
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} |
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|
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static TextEncoding* globalLatin1Encoding; |
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const TextEncoding& Latin1Encoding() |
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{ |
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if( !globalLatin1Encoding ) { |
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globalLatin1Encoding = new TextEncoding("Latin-1"); |
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} |
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return *globalLatin1Encoding; |
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} |
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|
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static TextEncoding* globalUTF16BigEndianEncoding; |
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const TextEncoding& UTF16BigEndianEncoding() |
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{ |
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if( !globalUTF16BigEndianEncoding ) { |
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globalUTF16BigEndianEncoding = new TextEncoding("UTF-16BE"); |
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} |
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return *globalUTF16BigEndianEncoding; |
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} |
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|
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static TextEncoding* globalUTF16LittleEndianEncoding; |
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const TextEncoding& UTF16LittleEndianEncoding() |
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{ |
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if( !globalUTF16LittleEndianEncoding ) { |
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globalUTF16LittleEndianEncoding = new TextEncoding("UTF-16LE"); |
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} |
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return *globalUTF16LittleEndianEncoding; |
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} |
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|
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static TextEncoding* globalUTF32BigEndianEncoding; |
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const TextEncoding& UTF32BigEndianEncoding() |
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{ |
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if( !globalUTF32BigEndianEncoding ) { |
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globalUTF32BigEndianEncoding = new TextEncoding("UTF-32BE"); |
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} |
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return *globalUTF32BigEndianEncoding; |
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} |
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|
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static TextEncoding* globalUTF32LittleEndianEncoding; |
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const TextEncoding& UTF32LittleEndianEncoding() |
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{ |
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if( !globalUTF32LittleEndianEncoding ) { |
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globalUTF32LittleEndianEncoding = new TextEncoding("UTF-32LE"); |
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} |
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return *globalUTF32LittleEndianEncoding; |
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} |
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static TextEncoding* globalUTF8Encoding; |
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const TextEncoding& UTF8Encoding() |
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{ |
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if( !globalUTF8Encoding ) { |
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globalUTF8Encoding = new TextEncoding("UTF-8"); |
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} |
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return *globalUTF8Encoding; |
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} |
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|
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static TextEncoding* globalWindowsLatin1Encoding; |
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const TextEncoding& WindowsLatin1Encoding() |
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{ |
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if( !globalWindowsLatin1Encoding ) { |
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globalWindowsLatin1Encoding = new TextEncoding("WinLatin-1"); |
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} |
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return *globalWindowsLatin1Encoding; |
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} |
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|
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struct cleanupTextEncodings { |
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~cleanupTextEncodings() { |
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// Delete all encodings and set to NULL |
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delete globalASCIIEncoding; |
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globalASCIIEncoding = NULL; |
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delete globalLatin1Encoding; |
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globalLatin1Encoding = NULL; |
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delete globalUTF16BigEndianEncoding; |
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globalUTF16BigEndianEncoding = NULL; |
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delete globalUTF16LittleEndianEncoding; |
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globalUTF16LittleEndianEncoding = NULL; |
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delete globalUTF32BigEndianEncoding; |
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globalUTF32BigEndianEncoding = NULL; |
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delete globalUTF32LittleEndianEncoding; |
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globalUTF32LittleEndianEncoding = NULL; |
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delete globalUTF8Encoding; |
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globalUTF8Encoding = NULL; |
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delete globalWindowsLatin1Encoding; |
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globalWindowsLatin1Encoding = NULL; |
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|
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} |
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}; |
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struct cleanupTextEncodings textEncodings; |
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} // namespace WebCore |