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123 lines
4.4 KiB
C++
123 lines
4.4 KiB
C++
/*
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* Copyright (C) 2007, 2008 Apple, Inc. All rights reserved.
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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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#include "flutter/sky/engine/wtf/text/TextCodecUserDefined.h"
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#include "flutter/sky/engine/wtf/PassOwnPtr.h"
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#include "flutter/sky/engine/wtf/text/CString.h"
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#include "flutter/sky/engine/wtf/text/StringBuffer.h"
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#include "flutter/sky/engine/wtf/text/StringBuilder.h"
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#include "flutter/sky/engine/wtf/text/WTFString.h"
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namespace WTF {
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void TextCodecUserDefined::registerEncodingNames(EncodingNameRegistrar registrar)
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{
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registrar("x-user-defined", "x-user-defined");
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}
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static PassOwnPtr<TextCodec> newStreamingTextDecoderUserDefined(const TextEncoding&, const void*)
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{
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return adoptPtr(new TextCodecUserDefined);
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}
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void TextCodecUserDefined::registerCodecs(TextCodecRegistrar registrar)
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{
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registrar("x-user-defined", newStreamingTextDecoderUserDefined, 0);
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}
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String TextCodecUserDefined::decode(const char* bytes, size_t length, FlushBehavior, bool, bool&)
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{
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StringBuilder result;
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result.reserveCapacity(length);
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for (size_t i = 0; i < length; ++i) {
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signed char c = bytes[i];
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result.append(static_cast<UChar>(c & 0xF7FF));
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}
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return result.toString();
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}
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template<typename CharType>
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static CString encodeComplexUserDefined(const CharType* characters, size_t length, UnencodableHandling handling)
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{
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Vector<char> result(length);
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char* bytes = result.data();
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size_t resultLength = 0;
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for (size_t i = 0; i < length; ) {
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UChar32 c;
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U16_NEXT(characters, i, length, c);
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signed char signedByte = c;
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if ((signedByte & 0xF7FF) == c)
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bytes[resultLength++] = signedByte;
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else {
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// No way to encode this character with x-user-defined.
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UnencodableReplacementArray replacement;
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int replacementLength = TextCodec::getUnencodableReplacement(c, handling, replacement);
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result.grow(resultLength + replacementLength + length - i);
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bytes = result.data();
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memcpy(bytes + resultLength, replacement, replacementLength);
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resultLength += replacementLength;
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}
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}
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return CString(bytes, resultLength);
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}
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template<typename CharType>
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CString TextCodecUserDefined::encodeCommon(const CharType* characters, size_t length, UnencodableHandling handling)
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{
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char* bytes;
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CString result = CString::newUninitialized(length, bytes);
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// Convert the string a fast way and simultaneously do an efficient check to see if it's all ASCII.
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UChar ored = 0;
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for (size_t i = 0; i < length; ++i) {
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UChar c = characters[i];
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bytes[i] = c;
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ored |= c;
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}
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if (!(ored & 0xFF80))
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return result;
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// If it wasn't all ASCII, call the function that handles more-complex cases.
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return encodeComplexUserDefined(characters, length, handling);
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}
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CString TextCodecUserDefined::encode(const UChar* characters, size_t length, UnencodableHandling handling)
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{
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return encodeCommon(characters, length, handling);
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}
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CString TextCodecUserDefined::encode(const LChar* characters, size_t length, UnencodableHandling handling)
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{
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return encodeCommon(characters, length, handling);
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}
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} // namespace WTF
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