org.apfloat.samples
Class Pi.ChudnovskyPiCalculator

java.lang.Object
  org.apfloat.samples.Pi.ChudnovskyPiCalculator

All Implemented Interfaces:

Serializable, Operation<Apfloat>

Direct Known Subclasses:

PiParallel.ParallelPiCalculator

Enclosing class:

Pi

public static class Pi.ChudnovskyPiCalculator
extends Object
implements Serializable, Operation<Apfloat>

Basic class for calculating pi using the Chudnovskys' binary splitting algorithm.

See Also:

Serialized Form

Field Summary

protected long	precision Target precision.
protected int	radix Radix to be used.

Constructor Summary

Pi.ChudnovskyPiCalculator(long precision, int radix)
Construct a pi calculator with the specified precision and radix.

Method Summary

Apfloat	execute() Calculate pi using the Chudnovskys' binary splitting algorithm.
protected void	r(long n1, long n2, ApfloatHolder T, ApfloatHolder Q, ApfloatHolder P, Pi.ChudnovskyProgressIndicator progressIndicator) Entry point for the binary splitting algorithm.

Methods inherited from class java.lang.Object

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

Field Detail

precision

protected long precision

Target precision.

radix

protected int radix

Radix to be used.

Constructor Detail

Pi.ChudnovskyPiCalculator

public Pi.ChudnovskyPiCalculator(long precision,
                                 int radix)
                          throws ApfloatRuntimeException

Construct a pi calculator with the specified precision and radix.

Parameters:

precision - The target precision.

radix - The radix to be used.

Throws:

ApfloatRuntimeException

Method Detail

r

protected void r(long n1,
                 long n2,
                 ApfloatHolder T,
                 ApfloatHolder Q,
                 ApfloatHolder P,
                 Pi.ChudnovskyProgressIndicator progressIndicator)
          throws ApfloatRuntimeException

Entry point for the binary splitting algorithm.

Parameters:

n1 - Start term.

n2 - End term.

T - Algorithm parameter.

Q - Algorithm parameter.

P - Algorithm parameter.

progressIndicator - Class to print out the progress of the calculation.

Throws:

ApfloatRuntimeException

execute

public Apfloat execute()

Calculate pi using the Chudnovskys' binary splitting algorithm.

Specified by:

execute in interface Operation<Apfloat>

Returns:

Return value of the operation.