Package com.tonic.analysis.instruction

Class WideInstruction

java.lang.Object

com.tonic.analysis.instruction.Instruction

com.tonic.analysis.instruction.WideInstruction

All Implemented Interfaces:

LocalVarInstruction

public class WideInstruction
extends Instruction
implements LocalVarInstruction

Represents the WIDE instruction (0xC4).

Constructor Summary

Constructors

Constructor	Description
WideInstruction(int opcode, int offset, Opcode modifiedOpcode, int varIndex)	Constructs a WideInstruction for variable instructions.
WideInstruction(int opcode, int offset, Opcode modifiedOpcode, int varIndex, int constValue)	Constructs a WideInstruction for IINC.

Method Summary

Modifier and Type	Method	Description
void	accept(AbstractBytecodeVisitor visitor)	Accepts a visitor for bytecode analysis.
int	getConstValue()
int	getLocalChange()	Returns the change in local variables caused by this instruction.
Opcode	getModifiedOpcode()
int	getStackChange()	Returns the change in stack size caused by this instruction.
int	getVarIndex()
String	toString()	Returns a string representation of the instruction.
void	write(DataOutputStream dos)	Writes the WIDE opcode and its operands 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

WideInstruction

public WideInstruction(int opcode,
                       int offset,
                       Opcode modifiedOpcode,
                       int varIndex)

Constructs a WideInstruction for variable instructions.

Parameters:

opcode - The opcode of the instruction.

offset - The bytecode offset of the instruction.

modifiedOpcode - The opcode of the instruction being modified.

varIndex - The local variable index.

WideInstruction

public WideInstruction(int opcode,
                       int offset,
                       Opcode modifiedOpcode,
                       int varIndex,
                       int constValue)

Constructs a WideInstruction for IINC.

Parameters:

opcode - The opcode of the instruction.

offset - The bytecode offset of the instruction.

modifiedOpcode - The opcode of the instruction being modified.

varIndex - The local variable index.

constValue - The constant value for IINC.

Method Detail

getModifiedOpcode

public Opcode getModifiedOpcode()

Returns:

the modified opcode

getVarIndex

public int getVarIndex()

Specified by:

getVarIndex in interface LocalVarInstruction

Returns:

the var index

getConstValue

public int getConstValue()

Returns:

the const 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 WIDE opcode and its operands 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 based on the modified opcode.

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 based on the modified opcode.

toString

public String toString()

Returns a string representation of the instruction.

Overrides:

toString in class Instruction

Returns:

The mnemonic and operands of the instruction.