third_party/WebKit/Source/modules/encoding/TextEncoder.cpp

/*
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#include "modules/encoding/TextEncoder.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExecutionContext.h"
#include "modules/encoding/Encoding.h"
#include "platform/wtf/text/CString.h"
#include "platform/wtf/text/TextEncodingRegistry.h"

namespace blink {

TextEncoder* TextEncoder::Create(ExecutionContext* context,
                                 ExceptionState& exception_state) {
  WTF::TextEncoding encoding("UTF-8");
  return new TextEncoder(encoding);
}

TextEncoder::TextEncoder(const WTF::TextEncoding& encoding)
    : encoding_(encoding), codec_(NewTextCodec(encoding)) {
  String name(encoding_.GetName());
  DCHECK_EQ(name, "UTF-8");
}

TextEncoder::~TextEncoder() {}

String TextEncoder::encoding() const {
  String name = String(encoding_.GetName()).DeprecatedLower();
  DCHECK_EQ(name, "utf-8");
  return name;
}

NotShared<DOMUint8Array> TextEncoder::encode(const String& input) {
  CString result;
  // Note that the UnencodableHandling here is never used since the
  // only possible encoding is UTF-8, which will use
  // U+FFFD-replacement rather than ASCII fallback substitution when
  // unencodable sequences (for instance, unpaired UTF-16 surrogates)
  // are present in the input.
  if (input.Is8Bit()) {
    result = codec_->Encode(input.Characters8(), input.length(),
                            WTF::kEntitiesForUnencodables);
  } else {
    result = codec_->Encode(input.Characters16(), input.length(),
                            WTF::kEntitiesForUnencodables);
  }

  const char* buffer = result.data();
  const unsigned char* unsigned_buffer =
      reinterpret_cast<const unsigned char*>(buffer);

  return NotShared<DOMUint8Array>(
      DOMUint8Array::Create(unsigned_buffer, result.length()));
}

}  // namespace blink