gnu.bytecode
Class Label

java.lang.Object
  |
  +--gnu.bytecode.Label

Direct Known Subclasses:

CodeFragment

public class Label

extends java.lang.Object

A Label represents a location in a Code attribute.

Constructor Summary

Label(CodeAttr code)

Label(Method method)

Method Summary

void	define(CodeAttr code) Define the value of a label as having the current location.
boolean	defined()
void	emit_wide(CodeAttr code, int start_pc) Emit a wide reference to the current label.
void	emit(CodeAttr code) Emit a reference to the current label.
boolean	hasFixups() Return true if there are references to this Label.

Methods inherited from class java.lang.Object

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

Constructor Detail

Label

public Label(Method method)

Label

public Label(CodeAttr code)

Method Detail

defined

public final boolean defined()

define

public void define(CodeAttr code)

Define the value of a label as having the current location.

Parameters:

code - the "Code" attribute of the current method

hasFixups

public boolean hasFixups()

Return true if there are references to this Label. We assume !defined().

emit

public void emit(CodeAttr code)

Emit a reference to the current label.

Parameters:

method - the current method Emit the reference as a 2-byte difference relative to PC-1.

emit_wide

public void emit_wide(CodeAttr code,
                      int start_pc)

Emit a wide reference to the current label.

Parameters:

code - the current method

start_pc - the PC at the start of this instruction Emit the reference as a 4-byte difference relative to PC-offset.