public void save(DataOutputStream out) throws IOException {
literalLengthModel.save(out);
offsetNibble0Model.save(out);
offsetNibble1Model.save(out);
offsetNibble2Model.save(out);
offsetNibble3Model.save(out);
}
public Codeword encode(int symbol) {
switch (state) {
case LiteralLengthState:
if (symbol > 255) {
state = State.OffsetNibble0State;
}
return literalLengthModel.encode(symbol);
case OffsetNibble0State:
state = State.OffsetNibble1State;
return offsetNibble0Model.encode(symbol);
case OffsetNibble1State:
state = State.OffsetNibble2State;
return offsetNibble1Model.encode(symbol);
case OffsetNibble2State:
state = State.OffsetNibble3State;
return offsetNibble2Model.encode(symbol);
case OffsetNibble3State:
state = State.LiteralLengthState;
return offsetNibble3Model.encode(symbol);
default:
throw new RuntimeException();
}
}
public Codeword decode(int bits) {
switch (state) {
case LiteralLengthState:
Codeword codeword = literalLengthModel.decode(bits);
if (codeword.getSymbol() > 255) {
state = State.OffsetNibble0State;
}
return codeword;
case OffsetNibble0State:
state = State.OffsetNibble1State;
return offsetNibble0Model.decode(bits);
case OffsetNibble1State:
state = State.OffsetNibble2State;
return offsetNibble1Model.decode(bits);
case OffsetNibble2State:
state = State.OffsetNibble3State;
return offsetNibble2Model.decode(bits);
case OffsetNibble3State:
state = State.LiteralLengthState;
return offsetNibble3Model.decode(bits);
default:
throw new RuntimeException();
}
}
public Codeword getCodewordForEOF() {
return literalLengthModel.getCodewordForEOF();
}
