proguard.classfile.instruction

Class BranchInstruction

java.lang.Object

proguard.classfile.instruction.Instruction

proguard.classfile.instruction.BranchInstruction

public class BranchInstruction
extends Instruction

This interface describes an instruction that branches to a given offset in the code.

Author:

Eric Lafortune

Field Summary

Fields

Modifier and Type	Field and Description
int	branchOffset

Fields inherited from class proguard.classfile.instruction.Instruction

opcode

Constructor Summary

Constructors

Constructor and Description
BranchInstruction() Creates an uninitialized BranchInstruction.
BranchInstruction(byte opcode, int branchOffset)

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, InstructionVisitor instructionVisitor) Accepts the given visitor.
byte	canonicalOpcode() Returns the canonical opcode of this instruction, i.e.
BranchInstruction	copy(BranchInstruction branchInstruction) Copies the given instruction into this instruction.
int	length(int offset) Returns the length in bytes of the instruction.
protected void	readInfo(byte[] code, int offset) Reads the data following the instruction opcode.
Instruction	shrink() Shrinks this instruction to its shortest possible form.
String	toString()
String	toString(int offset) Returns a description of the instruction, at the given offset.
protected void	writeInfo(byte[] code, int offset) Writes data following the instruction opcode.

Methods inherited from class proguard.classfile.instruction.Instruction

getName, isCategory2, isWide, mayThrowExceptions, readByte, readInt, readShort, readSignedByte, readSignedShort, readSignedValue, readValue, stackPopCount, stackPushCount, write, write, writeByte, writeInt, writeShort, writeSignedByte, writeSignedShort, writeSignedValue, writeValue

Methods inherited from class java.lang.Object

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

Field Detail

branchOffset

public int branchOffset

Constructor Detail

BranchInstruction

public BranchInstruction()

Creates an uninitialized BranchInstruction.

BranchInstruction

public BranchInstruction(byte opcode,
                 int branchOffset)

Method Detail

copy

public BranchInstruction copy(BranchInstruction branchInstruction)

Copies the given instruction into this instruction.

Parameters:

branchInstruction - the instruction to be copied.

Returns:

this instruction.

canonicalOpcode

public byte canonicalOpcode()

Description copied from class: Instruction

Returns the canonical opcode of this instruction, i.e. typically the opcode whose extension has been removed.

Overrides:

canonicalOpcode in class Instruction

shrink

public Instruction shrink()

Description copied from class: Instruction

Shrinks this instruction to its shortest possible form.

Specified by:

shrink in class Instruction

Returns:

this instruction.

readInfo

protected void readInfo(byte[] code,
            int offset)

Description copied from class: Instruction

Reads the data following the instruction opcode.

Specified by:

readInfo in class Instruction

writeInfo

protected void writeInfo(byte[] code,
             int offset)

Description copied from class: Instruction

Writes data following the instruction opcode.

Specified by:

writeInfo in class Instruction

length

public int length(int offset)

Description copied from class: Instruction

Returns the length in bytes of the instruction.

Specified by:

length in class Instruction

accept

public void accept(Clazz clazz,
          Method method,
          CodeAttribute codeAttribute,
          int offset,
          InstructionVisitor instructionVisitor)

Description copied from class: Instruction

Accepts the given visitor.

Specified by:

accept in class Instruction

toString

public String toString(int offset)

Description copied from class: Instruction

Returns a description of the instruction, at the given offset.

Overrides:

toString in class Instruction

toString

public String toString()

Overrides:

toString in class Object