#include "config.h"
#include "TextDecoder.h"
#include "HTMLParserIdioms.h"
#include "TextCodec.h"
#include "TextEncodingRegistry.h"
#include <wtf/Optional.h>
namespace WebCore {
TextDecoder::TextDecoder(const char* label, Options options)
: m_textEncoding(label)
, m_options(options)
{
}
TextDecoder::~TextDecoder() = default;
ExceptionOr<Ref<TextDecoder>> TextDecoder::create(const String& label, Options options)
{
String strippedLabel = stripLeadingAndTrailingHTMLSpaces(label);
const UChar nullCharacter = '\0';
if (strippedLabel.contains(nullCharacter))
return Exception { RangeError };
auto decoder = adoptRef(*new TextDecoder(strippedLabel.utf8().data(), options));
if (!decoder->m_textEncoding.isValid() || !strcmp(decoder->m_textEncoding.name(), "replacement"))
return Exception { RangeError };
return decoder;
}
ExceptionOr<String> TextDecoder::decode(Optional<BufferSource::VariantType> input, DecodeOptions options)
{
Optional<BufferSource> inputBuffer;
const uint8_t* data = nullptr;
size_t length = 0;
if (input) {
inputBuffer = BufferSource(WTFMove(input.value()));
data = inputBuffer->data();
length = inputBuffer->length();
}
if (!m_codec) {
m_codec = newTextCodec(m_textEncoding);
if (!m_options.ignoreBOM)
m_codec->stripByteOrderMark();
}
bool sawError = false;
String result = m_codec->decode(reinterpret_cast<const char*>(data), length, !options.stream, m_options.fatal, sawError);
if (!options.stream && !m_options.ignoreBOM)
m_codec->stripByteOrderMark();
if (sawError && m_options.fatal)
return Exception { TypeError };
return result;
}
String TextDecoder::encoding() const
{
return String(m_textEncoding.name()).convertToASCIILowercase();
}
}