Apache POI - Common 5.3.0 · org.apache.poi.ss.util.ExpandedDouble

Represents a 64 bit IEEE double quantity expressed with both decimal and binary exponents Does not handle negative numbers or zero

The value of a ExpandedDouble is given by
a × 2^b
where:
a = significand
b = binaryExponent - bitLength(significand) + 1

Field Summary

Modifier and Type	Field and Description
private final int	_binaryExponent
private final BigInteger	_significand Always 64 bits long (MSB, bit-63 is '1')
private static final BigInteger	BI_FRAC_MASK
private static final BigInteger	BI_IMPLIED_FRAC_MSB

Access	Constructor and Description
public	ExpandedDouble(long rawBits)
pack-priv	ExpandedDouble(BigInteger frac, int binaryExp)

Modifier and Type	Method and Description
public static ExpandedDouble	fromRawBitsAndExponent(long rawBits, int exp)
public int	Returns: the number of non-fractional bits after the MSB of the significand getBinaryExponent()
private static BigInteger	getFrac(long rawBits)
public BigInteger	getSignificand()
public NormalisedDecimal	normaliseBaseTen() Convert to an equivalent `NormalisedDecimal` representation having 15 decimal digits of precision in the non-fractional bits of the significand.

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

_binaryExponent	back to summary
private final int _binaryExponent

_significand	back to summary
private final BigInteger _significand Always 64 bits long (MSB, bit-63 is '1')

BI_FRAC_MASK	back to summary
private static final BigInteger BI_FRAC_MASK

BI_IMPLIED_FRAC_MSB	back to summary
private static final BigInteger BI_IMPLIED_FRAC_MSB

ExpandedDouble	back to summary
public ExpandedDouble(long rawBits)

ExpandedDouble	back to summary
pack-priv ExpandedDouble(BigInteger frac, int binaryExp)

fromRawBitsAndExponent	back to summary
public static ExpandedDouble fromRawBitsAndExponent(long rawBits, int exp)

getBinaryExponent	back to summary
public int getBinaryExponent() Returns:int the number of non-fractional bits after the MSB of the significand

getFrac	back to summary
private static BigInteger getFrac(long rawBits)

getSignificand	back to summary
public BigInteger getSignificand()

normaliseBaseTen	back to summary
public NormalisedDecimal normaliseBaseTen() Convert to an equivalent `NormalisedDecimal` representation having 15 decimal digits of precision in the non-fractional bits of the significand.