Method WriteNWords

compressor/encode.go:276–310

Encodes N words

(words []byte)

// Encodes N words
func (buf *Buffer) WriteNWords(words []byte) (EncodeType, error) {
	count := len(words) / 32
	if len(words)%32 != 0 {
		return Stateless, fmt.Errorf("words are not aligned to 32 bytes")
	}

	if count == 0 {
		return Stateless, fmt.Errorf("words are empty")
	}

	if count <= 255 {
		buf.commitUint(FLAG_NESTED_N_FLAGS_S)
		buf.commitByte(byte(count))
	} else if count <= 65535 {
		buf.commitUint(FLAG_NESTED_N_FLAGS_L)
		buf.commitByte(byte(count >> 8))
		buf.commitByte(byte(count))
	} else {
		return Stateless, fmt.Errorf("too many words")
	}

	buf.end([]byte{}, Stateless)

	encodeType := Stateless
	for i := 0; i < count; i++ {
		encoded, err := buf.WriteWord(words[i*32:i*32+32], buf.Refs.useContractStorage)
		if err != nil {
			return Stateless, err
		}

		encodeType = maxPriority(encodeType, encoded)
	}

	return encodeType, nil
}

// Encodes and writes a word to the buffer
func (buf *Buffer) WriteWord(word []byte, useStorage bool) (EncodeType, error) {