Package EDU.purdue.cs.bloat.editor

Class Switch

java.lang.Object

EDU.purdue.cs.bloat.editor.Switch

public class Switch
extends java.lang.Object

Switch is used to hold the lookup values and branch targets of a tableswitch or lookup switch instruction.

The tableswitch low-to-high range of values is represented by storing each lookup value in the range. This allows the tableswitch to be replaced with a lookupswitch if branches are deleted.

Constructor Summary

Constructors

Constructor	Description
Switch(Label defaultTarget, Label[] targets, int[] values)	Constructor.

Method Summary

Modifier and Type	Method	Description
Label	defaultTarget()	Get the default target of the switch.
boolean	hasContiguousValues()	Check if the all the values in the range of lookup values are contiguous.
int	highValue()	Get the high value in the range the lookup values.
int	lowValue()	Get the low value in the range the lookup values.
void	setDefaultTarget(Label target)	Set the default target of the switch.
Label[]	targets()	Get the non-default branch targets of the switch.
java.lang.String	toString()	Convert the operand to a string.
int[]	values()	Get the lookup values of the switch, sorted low to high.

Methods inherited from class java.lang.Object

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

Constructor Detail

Switch

public Switch(Label defaultTarget,
              Label[] targets,
              int[] values)

Constructor.

Parameters:

defaultTarget - The default target of the switch.

targets - The non-default branch targets of the switch.

values - The lookup values of the switch. This array must be the same size as the targets array.

Method Detail

setDefaultTarget

public void setDefaultTarget(Label target)

Set the default target of the switch.

Parameters:

target - The default target of the switch.

defaultTarget

public Label defaultTarget()

Get the default target of the switch.

Returns:

The default target of the switch.

targets

public Label[] targets()

Get the non-default branch targets of the switch. The targets are sorted by the corresponding lookup value.

Returns:

The non-default branch targets of the switch.

values

public int[] values()

Get the lookup values of the switch, sorted low to high.

Returns:

The lookup values of the switch.

hasContiguousValues

public boolean hasContiguousValues()

Check if the all the values in the range of lookup values are contiguous. If they are, a table switch can be used. If not a lookupswitch can be used.

Returns:

true if contiguous, false if not.

lowValue

public int lowValue()

Get the low value in the range the lookup values.

Returns:

The low value.

highValue

public int highValue()

Get the high value in the range the lookup values.

Returns:

The high value.

toString

public java.lang.String toString()

Convert the operand to a string.

Overrides:

toString in class java.lang.Object

Returns:

A string representation of the operand.