Package com.tonic.analysis.instruction

Class IConstInstruction

java.lang.Object

com.tonic.analysis.instruction.Instruction

com.tonic.analysis.instruction.IConstInstruction

public class IConstInstruction
extends Instruction

Represents the JVM ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, and ICONST_5 instructions.

Constructor Summary

Constructors

Constructor	Description
IConstInstruction(int opcode, int offset, int value)	Constructs an IConstInstruction.

Method Summary

Modifier and Type	Method	Description
void	accept(AbstractBytecodeVisitor visitor)	Accepts a visitor for bytecode analysis.
int	getLocalChange()	Returns the change in local variables caused by this instruction.
int	getStackChange()	Returns the change in stack size caused by this instruction.
int	getValue()
String	toString()	Returns a string representation of the instruction.
void	write(DataOutputStream dos)	Writes the ICONST_* opcode to the DataOutputStream.

Methods inherited from class com.tonic.analysis.instruction.Instruction

getLength, getOffset, getOpcode, setOffset

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

IConstInstruction

public IConstInstruction(int opcode,
                         int offset,
                         int value)

Constructs an IConstInstruction.

Parameters:

opcode - The opcode of the instruction.

offset - The bytecode offset of the instruction.

value - The integer constant value.

Method Detail

getValue

public int getValue()

Returns:

the value

accept

public void accept(AbstractBytecodeVisitor visitor)

Description copied from class: Instruction

Accepts a visitor for bytecode analysis.

Specified by:

accept in class Instruction

Parameters:

visitor - The visitor to accept.

write

public void write(DataOutputStream dos)
           throws IOException

Writes the ICONST_* opcode to the DataOutputStream.

Specified by:

write in class Instruction

Parameters:

dos - The DataOutputStream to write to.

Throws:

IOException - If an I/O error occurs.

getStackChange

public int getStackChange()

Returns the change in stack size caused by this instruction.

Specified by:

getStackChange in class Instruction

Returns:

The stack size change (pushes an int).

getLocalChange

public int getLocalChange()

Returns the change in local variables caused by this instruction.

Specified by:

getLocalChange in class Instruction

Returns:

The local variables size change (none).

toString

public String toString()

Returns a string representation of the instruction.

Overrides:

toString in class Instruction

Returns:

The mnemonic and value of the instruction.