org.zmpp.vm
Class Operand

java.lang.Object
  org.zmpp.vm.Operand

public class Operand
extends Object

This is the definition of an instruction's operand. Each operand has an operand type, and a value which is to be interpreted according to the type.

Version:

1.0

Author:

Wei-ju Wu

Nested Class Summary

static class

Operand.OperandType The available operand types.

Field Summary

static byte	TYPENUM_LARGE_CONSTANT Type number for a large constant.
static byte	TYPENUM_OMITTED Type number for omitted.
static byte	TYPENUM_SMALL_CONSTANT Type number for a small constant.
static byte	TYPENUM_VARIABLE Type number for a variable.

Constructor Summary

Operand(int typenum, short value)
Constructor.

Method Summary

Operand.OperandType	getType() Returns this operand's type.
short	getValue() The operand value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TYPENUM_LARGE_CONSTANT

public static final byte TYPENUM_LARGE_CONSTANT

Type number for a large constant.

See Also:

Constant Field Values

TYPENUM_SMALL_CONSTANT

public static final byte TYPENUM_SMALL_CONSTANT

Type number for a small constant.

See Also:

Constant Field Values

TYPENUM_VARIABLE

public static final byte TYPENUM_VARIABLE

Type number for a variable.

See Also:

Constant Field Values

TYPENUM_OMITTED

public static final byte TYPENUM_OMITTED

Type number for omitted.

See Also:

Constant Field Values

Constructor Detail

Operand

public Operand(int typenum,
               short value)

Constructor.

Parameters:

typenum - the type number, must be < 4

value - the operand value

Method Detail

getType

public Operand.OperandType getType()

Returns this operand's type.

Returns:

the operand type

getValue

public short getValue()

The operand value.

Returns:

the value