Modifier and Type	Class and Description
private static class	MutableFPNumber.Rounder
private static class	MutableFPNumber.TenPower Holds values for quick multiplication and division by 10

Field Summary

Modifier and Type	Field and Description
private int	_binaryExponent
private BigInteger	_significand
private static final BigInteger	BI_MAX_BASE For 'Base-10 normalised form' The maximum `_significand` value when `_binaryExponent` == 49 (10^15-0.5) * 2^14
private static final BigInteger	BI_MIN_BASE The minimum value in 'Base-10 normalised form'.
private static final int	C_64 Width of a long
private static final int	MIN_PRECISION Minimum precision after discarding whole 32-bit words from the significand

Access	Constructor and Description
public	MutableFPNumber(BigInteger frac, int binaryExponent)

Method Summary

Modifier and Type	Method and Description
public MutableFPNumber	copy()
public ExpandedDouble	createExpandedDouble()
public NormalisedDecimal	createNormalisedDecimal(int pow10)
public int	get64BitNormalisedExponent()
public boolean	isAboveMinRep()
public boolean	isBelowMaxRep()
private void	mulShift(BigInteger multiplicand, int multiplierShift)
public void	multiplyByPowerOfTen(int pow10)
public void	normalise64bit()

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

_binaryExponent	back to summary
private int _binaryExponent

_significand	back to summary
private BigInteger _significand

BI_MAX_BASE	back to summary
private static final BigInteger BI_MAX_BASE For 'Base-10 normalised form' The maximum `_significand` value when `_binaryExponent` == 49 (10^15-0.5) * 2^14

BI_MIN_BASE back to summary

BI_MIN_BASE	back to summary
private static final BigInteger BI_MIN_BASE The minimum value in 'Base-10 normalised form'. When `_binaryExponent` == 46 this is the minimum `_significand` value (10¹⁴-0.05) * 2^17 Values between (10¹⁴-0.05) and 10¹⁴ will be represented as '1' followed by 14 zeros. Values less than (10¹⁴-0.05) will get shifted by one more power of 10 This frac value rounds to '1' followed by fourteen zeros with an incremented decimal exponent

private static final BigInteger BI_MIN_BASE

The minimum value in 'Base-10 normalised form'.
When _binaryExponent == 46 this is the minimum _significand value (10¹⁴-0.05) * 2^17
Values between (10¹⁴-0.05) and 10¹⁴ will be represented as '1' followed by 14 zeros. Values less than (10¹⁴-0.05) will get shifted by one more power of 10 This frac value rounds to '1' followed by fourteen zeros with an incremented decimal exponent

C_64	back to summary
private static final int C_64 Width of a long

MIN_PRECISION	back to summary
private static final int MIN_PRECISION Minimum precision after discarding whole 32-bit words from the significand

MutableFPNumber	back to summary
public MutableFPNumber(BigInteger frac, int binaryExponent)

Method Detail

copy	back to summary
public MutableFPNumber copy()

createExpandedDouble	back to summary
public ExpandedDouble createExpandedDouble()

createNormalisedDecimal	back to summary
public NormalisedDecimal createNormalisedDecimal(int pow10)

get64BitNormalisedExponent	back to summary
public int get64BitNormalisedExponent()

isAboveMinRep	back to summary
public boolean isAboveMinRep()

isBelowMaxRep	back to summary
public boolean isBelowMaxRep()

mulShift	back to summary
private void mulShift(BigInteger multiplicand, int multiplierShift)

multiplyByPowerOfTen	back to summary
public void multiplyByPowerOfTen(int pow10)

normalise64bit	back to summary
public void normalise64bit()

org.apache.poi.ss.util back to summary

private final Class MutableFPNumber.Rounder

Class Inheritance

extends Object

java.lang.Object
org.apache.poi.ss.util.MutableFPNumber.Rounder

Field Summary

Modifier and Type	Field and Description
private static final BigInteger[]	HALF_BITS

Constructor Summary

Access	Constructor and Description
private	Rounder()

Method Summary

Modifier and Type	Method and Description
public static BigInteger	round(BigInteger bi, int number of bits to shift right nBits)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

HALF_BITS	back to summary
private static final BigInteger[] HALF_BITS

Constructor Detail

Rounder	back to summary
private Rounder()

Method Detail

round	back to summary
public static BigInteger round(BigInteger bi, int nBits) Parameters nBits:int number of bits to shift right

org.apache.poi.ss.util back to summary

private final Class MutableFPNumber.TenPower

Class Inheritance

extends Object

java.lang.Object
org.apache.poi.ss.util.MutableFPNumber.TenPower

Holds values for quick multiplication and division by 10

Field Summary

Modifier and Type	Field and Description
private static final MutableFPNumber.TenPower[]	_cache
public final BigInteger	_divisor
public final int	_divisorShift
public final BigInteger	_multiplicand
public final int	_multiplierShift
private static final BigInteger	FIVE

Constructor Summary

Access	Constructor and Description
private	TenPower(int index)

Method Summary

Modifier and Type	Method and Description
pack-priv static MutableFPNumber.TenPower	getInstance(int index)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

_cache	back to summary
private static final MutableFPNumber.TenPower[] _cache

_divisor	back to summary
public final BigInteger _divisor

_divisorShift	back to summary
public final int _divisorShift

_multiplicand	back to summary
public final BigInteger _multiplicand

_multiplierShift	back to summary
public final int _multiplierShift

FIVE	back to summary
private static final BigInteger FIVE

Constructor Detail

TenPower	back to summary
private TenPower(int index)

Method Detail

getInstance	back to summary
pack-priv static MutableFPNumber.TenPower getInstance(int index)

pack-priv final Class MutableFPNumber

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class MutableFPNumber.Rounder

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class MutableFPNumber.TenPower

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail