proguard.classfile.editor

Class CodeAttributeEditor.Label

java.lang.Object

proguard.classfile.instruction.Instruction

proguard.classfile.editor.CodeAttributeEditor.Label

Enclosing class:

CodeAttributeEditor

public static class CodeAttributeEditor.Label
extends Instruction

This pseudo-instruction represents a label that marks an instruction offset, for use in the context of the code attribute editor only.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	identifier

Fields inherited from class proguard.classfile.instruction.Instruction

opcode

Constructor Summary

Constructors

Constructor and Description
Label(int identifier) Creates a new Label.

Method Summary

Modifier and Type	Method and Description
void	accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, InstructionVisitor instructionVisitor) Accepts the given visitor.
int	length(int offset) Returns the length in bytes of the instruction.
int	offset() Returns the offset that can then be used as a branch target in other replacement instructions.
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()
void	write(byte[] code, int offset) Writes the Instruction at the given offset in the given code array.
protected void	writeInfo(byte[] code, int offset) Writes data following the instruction opcode.

Methods inherited from class proguard.classfile.instruction.Instruction

actualOpcode, canonicalOpcode, getName, isCategory2, isWide, mayThrowExceptions, readByte, readInt, readShort, readSignedByte, readSignedShort, readSignedValue, readValue, stackPopCount, stackPushCount, toString, 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

identifier

protected final int identifier

Constructor Detail

Label

public Label(int identifier)

Creates a new Label.

Parameters:

identifier - an identifier that can be chosen freely.

Method Detail

offset

public int offset()

Returns the offset that can then be used as a branch target in other replacement instructions.

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.

write

public void write(byte[] code,
                  int offset)

Description copied from class: Instruction

Writes the Instruction at the given offset in the given code array.

Overrides:

write in class 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()

Overrides:

toString in class Object