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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_CODEC_UTF8_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_CODEC_UTF8_H_
#include <unicode/utf8.h>
#include <memory>
#include "third_party/blink/renderer/platform/wtf/text/text_codec.h"
namespace WTF {
class TextCodecUTF8 : public TextCodec {
public:
static void RegisterEncodingNames(EncodingNameRegistrar);
static void RegisterCodecs(TextCodecRegistrar);
protected:
TextCodecUTF8() : partial_sequence_size_(0) {}
private:
static std::unique_ptr<TextCodec> Create(const TextEncoding&, const void*);
String Decode(base::span<const uint8_t> data,
FlushBehavior,
bool stop_on_error,
bool& saw_error) override;
std::string Encode(base::span<const UChar>, UnencodableHandling) override;
std::string Encode(base::span<const LChar>, UnencodableHandling) override;
// See comment above TextCodec::EncodeInto for more information.
// This implementation writes as many code points to |destination| as will
// fit, while never writing partial code points. If EncodeIntoResult's
// |bytes_written| member is less than |capacity|, the remaining
// |capacity| - |bytes_written| bytes remain untouched.
EncodeIntoResult EncodeInto(base::span<const UChar>,
base::span<uint8_t> destination) override;
EncodeIntoResult EncodeInto(base::span<const LChar>,
base::span<uint8_t> destination) override;
template <typename CharType>
std::string EncodeCommon(base::span<const CharType> characters);
template <typename CharType>
EncodeIntoResult EncodeIntoCommon(base::span<const CharType> characters,
base::span<uint8_t> destination);
template <typename CharType>
bool HandlePartialSequence(CharType*& destination,
const uint8_t*& source,
const uint8_t* end,
bool flush,
bool stop_on_error,
bool& saw_error);
void HandleError(int character,
UChar*& destination,
bool stop_on_error,
bool& saw_error);
void ConsumePartialSequenceBytes(int num_bytes);
int partial_sequence_size_;
uint8_t partial_sequence_[U8_MAX_LENGTH];
};
} // namespace WTF
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_CODEC_UTF8_H_
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