#ifndef SRC_STRING_DECODER_H_
#define SRC_STRING_DECODER_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "node.h"

namespace node {

class StringDecoder {
 public:
 StringDecoder() { state_[kEncodingField] = BUFFER; }
 inline void SetEncoding(enum encoding encoding);
 inline enum encoding Encoding() const;

 inline char* IncompleteCharacterBuffer();
 inline unsigned MissingBytes() const;
 inline unsigned BufferedBytes() const;

 // Decode a string from the specified encoding.
 // The value pointed to by `nread` will be modified to reflect that
 // less data may have been read because it ended on an incomplete character
 // and more data may have been read because a previously incomplete character
 // was finished.
 v8::MaybeLocal<v8::String> DecodeData(v8::Isolate* isolate,
 const char* data,
 size_t* nread);
 // Flush an incomplete character. For character encodings like UTF8 this
 // means printing replacement characters, buf for e.g. Base64 the returned
 // string contains more data.
 v8::MaybeLocal<v8::String> FlushData(v8::Isolate* isolate);

 enum Fields {
 kIncompleteCharactersStart = 0,
 kIncompleteCharactersEnd = 4,
 kMissingBytes = 4,
 kBufferedBytes = 5,
 kEncodingField = 6,
 kNumFields = 7
 };

 private:
 uint8_t state_[kNumFields] = {};
};

} // namespace node

#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif // SRC_STRING_DECODER_H_