xtc.type
Class IndexReference

java.lang.Object
  xtc.type.Reference
      xtc.type.RelativeReference
          xtc.type.IndexReference

public class IndexReference
extends RelativeReference

Representation of an index reference.

Version:

$Revision: 1.8 $

Author:

Robert Grimm

Field Summary

Fields inherited from class xtc.type.RelativeReference

base

Fields inherited from class xtc.type.Reference

type

Constructor Summary

IndexReference(Reference base, java.math.BigInteger index)
Create a new index reference.

Method Summary

Reference	add(java.math.BigInteger val) Add the specified value to this reference.
boolean	equals(java.lang.Object o)
java.math.BigInteger	getIndex() Get this reference's index.
java.math.BigInteger	getLocation(C ops) Get this reference's absolute memory location.
int	hashCode()
boolean	hasIndex() Determine whether this reference has an index.
boolean	hasLocation() Determine whether this reference has an absolute memory location.
boolean	isNull() Determine whether this reference is a null reference.
Reference	subtract(java.math.BigInteger val) Subtract the specified value from this reference.
void	write(java.lang.Appendable out) Write a human readable representation to the specified appendable.

Methods inherited from class xtc.type.RelativeReference

getBase, hasBase, isConstant

Methods inherited from class xtc.type.Reference

add, difference, getField, getType, hasField, indirect, isCast, isDynamic, isIndirect, isPrefix, isStatic, isString, isVariable, subtract, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

IndexReference

public IndexReference(Reference base,
                      java.math.BigInteger index)

Create a new index reference.

Parameters:

base - The base reference.

index - The index.

Method Detail

isNull

public boolean isNull()

Description copied from class: Reference

Determine whether this reference is a null reference. Note that a reference other than NullReference.NULL may still return true; notably, an index reference with a null base and a zero offset still is null.

Overrides:

isNull in class Reference

Returns:

true if this reference is a null reference.

See Also:

NullReference

hasIndex

public boolean hasIndex()

Description copied from class: Reference

Determine whether this reference has an index.

Overrides:

hasIndex in class Reference

Returns:

true if this reference has an index.

See Also:

IndexReference

getIndex

public java.math.BigInteger getIndex()

Description copied from class: Reference

Get this reference's index.

Overrides:

getIndex in class Reference

Returns:

The index.

hasLocation

public boolean hasLocation()

Description copied from class: Reference

Determine whether this reference has an absolute memory location.

Overrides:

hasLocation in class Reference

Returns:

true if this reference has an absolute memory location.

getLocation

public java.math.BigInteger getLocation(C ops)

Description copied from class: Reference

Get this reference's absolute memory location.

Overrides:

getLocation in class Reference

Parameters:

ops - The C operations.

Returns:

The memory location.

add

public Reference add(java.math.BigInteger val)

Description copied from class: Reference

Add the specified value to this reference.

Overrides:

add in class Reference

Parameters:

val - The value.

Returns:

A reference with an index increased by val.

subtract

public Reference subtract(java.math.BigInteger val)

Description copied from class: Reference

Subtract the specified value from this reference.

Overrides:

subtract in class Reference

Parameters:

val - The value.

Returns:

A reference with an index decreased by val.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

write

public void write(java.lang.Appendable out)
           throws java.io.IOException

Description copied from class: Reference

Write a human readable representation to the specified appendable.

Specified by:

write in class Reference

Parameters:

out - The appendable.

Throws:

java.io.IOException - Signals an I/O error.