Instruction.java

package com.galaxtone.bytefuck.instructions;

public abstract class Instruction {

	public byte getType() {
		return 0;
	}

	public abstract byte getOpcode();

	public static abstract class IndexInstruction extends Instruction {

		public final int index;

		private IndexInstruction(int index) {
			this.index = index;
		}

		@Override
		public byte getType() {
			return 1;
		}
	}

	public static abstract class IndexValueInstruction extends IndexInstruction {

		public final byte value;

		private IndexValueInstruction(int index, short value) {
			super(index);

			this.value = (byte) (value & 0xFF);
		}

		@Override
		public byte getType() {
			return 2;
		}
	}

	public static abstract class LongIndexInstruction extends Instruction {

		public final long index;

		private LongIndexInstruction(long lowerIndex, long upperIndex) {
			this.index = (lowerIndex & 0xFFFFFFFF) | (upperIndex & 0xFFFFFFFF) << 32;
		}

		@Override
		public byte getType() {
			return 3;
		}
	}

	public static abstract class LongIndexValueInstruction extends LongIndexInstruction {

		public final int value;

		private LongIndexValueInstruction(long lowerIndex, long upperIndex, long value) {
			super(lowerIndex, upperIndex);

			this.value = (int) (value & 0xFFFFFFFF);
		}

		@Override
		public byte getType() {
			return 4;
		}
	}

	public static abstract class StringInstruction extends Instruction {

		public final String value;

		private StringInstruction(String value) {
			this.value = value;
		}

		@Override
		public byte getType() {
			return 5;
		}
	}

	public static final class Add extends IndexValueInstruction {

		public Add(int index, short value) {
			super(index, value);
		}

		@Override
		public byte getOpcode() {
			return 0;
		}
	}

	public static final class Move extends IndexInstruction {

		public Move(int index) {
			super(index);
		}

		@Override
		public byte getOpcode() {
			return 1;
		}
	}

	public static final class Input extends IndexInstruction {

		public Input(int index) {
			super(index);
		}

		@Override
		public byte getOpcode() {
			return 2;
		}
	}

	public static final class Output extends IndexInstruction {

		public Output(int index) {
			super(index);
		}

		@Override
		public byte getOpcode() {
			return 3;
		}
	}

	public static final class Skip extends Instruction {

		public Skip() {
			super();
		}

		@Override
		public byte getOpcode() {
			return 4;
		}
	}

	public static final class Jump extends IndexInstruction {

		public Jump(int index) {
			super(index);
		}

		@Override
		public byte getOpcode() {
			return 5;
		}
	}

	public static final class Define extends LongIndexValueInstruction {

		public Define(long lowerIndex, long upperIndex, long value) {
			super(lowerIndex, upperIndex, value);
		}

		@Override
		public byte getOpcode() {
			return 6;
		}
	}

	public static final class Call extends LongIndexInstruction {

		public Call(long lowerIndex, long upperIndex) {
			super(lowerIndex, upperIndex);
		}

		@Override
		public byte getOpcode() {
			return 7;
		}
	}

	public static final class Import extends StringInstruction {

		public Import(String value) {
			super(value);
		}

		@Override
		public byte getOpcode() {
			return 8;
		}
	}
}