Package com.tonic.analysis.instruction

Class ConditionalBranchInstruction

java.lang.Object

com.tonic.analysis.instruction.Instruction

com.tonic.analysis.instruction.ConditionalBranchInstruction

public class ConditionalBranchInstruction
extends Instruction

Represents the conditional branch instructions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ConditionalBranchInstruction.BranchType	The conditional branch kinds, each pairing a JVM opcode with its mnemonic.

Constructor Summary

Constructors

Constructor	Description
ConditionalBranchInstruction(int opcode, int offset, short branchOffset)	Constructs a ConditionalBranchInstruction.

Method Summary

Modifier and Type	Method	Description
void	accept(AbstractBytecodeVisitor visitor)	Accepts a visitor for bytecode analysis.
int	getBranchOffset()	Returns the branch offset.
int	getLocalChange()	Returns the change in local variables caused by this instruction.
int	getStackChange()	Returns the change in stack size caused by this instruction.
ConditionalBranchInstruction.BranchType	getType()	Returns the type of branch operation.
String	toString()	Returns a string representation of the instruction.
void	write(DataOutputStream dos)	Writes the conditional branch 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

ConditionalBranchInstruction

public ConditionalBranchInstruction(int opcode,
                                    int offset,
                                    short branchOffset)

Constructs a ConditionalBranchInstruction.

Parameters:

opcode - The opcode of the instruction.

offset - The bytecode offset of the instruction.

branchOffset - The branch target offset relative to current instruction.

Throws:

IllegalArgumentException - if the opcode is not a conditional branch opcode

Method Detail

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 conditional branch 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 branch type.

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).

getType

public ConditionalBranchInstruction.BranchType getType()

Returns the type of branch operation.

Returns:

The BranchType enum value.

getBranchOffset

public int getBranchOffset()

Returns the branch offset.

Returns:

The branch target offset.

toString

public String toString()

Returns a string representation of the instruction.

Overrides:

toString in class Instruction

Returns:

The mnemonic and branch target of the instruction.