org.zmpp.vm
Class PrintLiteralInstruction

java.lang.Object
  org.zmpp.vm.AbstractInstruction
      org.zmpp.vm.PrintLiteralInstruction

All Implemented Interfaces:

Instruction

public class PrintLiteralInstruction
extends AbstractInstruction

This class implements the print and print_ret instructions.

Version:

1.0

Author:

Wei-ju Wu

Nested Class Summary

Nested classes/interfaces inherited from class org.zmpp.vm.AbstractInstruction

AbstractInstruction.InstructionForm, AbstractInstruction.OperandCount

Field Summary

static int	OP_PRINT
static int	OP_PRINT_RET

Fields inherited from class org.zmpp.vm.AbstractInstruction

FALSE, TRUE

Constructor Summary

PrintLiteralInstruction(Machine machineState, int opcode, MemoryReadAccess memaccess, int instrAddress)
Constructor.

Method Summary

void	execute() Execute the instruction.
AbstractInstruction.InstructionForm	getInstructionForm() Returns the instruction's form.
int	getLength() Returns the instruction's length in bytes.
int	getLiteralAddress() Returns the address of the literal.
AbstractInstruction.OperandCount	getOperandCount() Returns the instruction's operand count type.
void	setLength(int length) Sets the instruction's length in bytes.

Methods inherited from class org.zmpp.vm.AbstractInstruction

addOperand, branchIfTrue, branchOnTest, getBranchOffset, getMachine, getNumOperands, getOpcode, getOperand, getStoreVariable, getUnsignedValue, getValue, isBranch, nextInstruction, returnFromRoutine, setBranchIfTrue, setBranchOffset, setOpcode, setStoreVariable, storeResult, storesResult, throwInvalidOpcode

Methods inherited from class java.lang.Object

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

Field Detail

OP_PRINT

public static final int OP_PRINT

See Also:

Constant Field Values

OP_PRINT_RET

public static final int OP_PRINT_RET

See Also:

Constant Field Values

Constructor Detail

PrintLiteralInstruction

public PrintLiteralInstruction(Machine machineState,
                               int opcode,
                               MemoryReadAccess memaccess,
                               int instrAddress)

Constructor.

Parameters:

machineState - the machine state reference

opcode - the opcode

memaccess - the memory access object

instrAddress - the instruction address

Method Detail

getInstructionForm

public AbstractInstruction.InstructionForm getInstructionForm()

Returns the instruction's form.

Specified by:

getInstructionForm in class AbstractInstruction

Returns:

the instruction form

getOperandCount

public AbstractInstruction.OperandCount getOperandCount()

Returns the instruction's operand count type.

Specified by:

getOperandCount in class AbstractInstruction

Returns:

the operand count type

setLength

public void setLength(int length)

Sets the instruction's length in bytes.

Overrides:

setLength in class AbstractInstruction

Parameters:

length - the length in bytes

getLength

public int getLength()

Returns the instruction's length in bytes.

Overrides:

getLength in class AbstractInstruction

Returns:

the instruction length

execute

public void execute()

Execute the instruction.

getLiteralAddress

public int getLiteralAddress()

Returns the address of the literal.

Returns:

the address of the literal