numeric

Documentation

Index

• func Float64ToSortableLong(value float64) uint64
• func IntToSortableBytes(value int32, result []byte)
• func SortableBytesToInt(encoded []byte) int32
• func SortableBytesToLong(encoded []byte) int64
• func SortableBytesToUint64(encoded []byte) uint64
• func SortableFloat64Bits(bits uint64) uint64
• func SortableUint64ToFloat64(encoded uint64) float64
• func Subtract(bytesPerDim, dim int, a, b, result []byte) error
• func Uint64ToSortableBytes(num uint64, result []byte)

Functions

func Float64ToSortableLong

func Float64ToSortableLong(value float64) uint64

Float64ToSortableLong Converts a double value to a sortable signed long. The value is converted by getting their IEEE 754 floating-point "double format" bit layout and then some bits are swapped, to be able to compare the result as long. By this the precision is not reduced, but the value can easily used as a long. The sort order (including Double.NaN) is defined by Double.compareTo; NaN is greater than positive infinity. SortableLongToDouble

func IntToSortableBytes

func IntToSortableBytes(value int32, result []byte)

IntToSortableBytes Encodes an int32 value such that unsigned byte order comparison is consistent with Integer.compare(int, int) 请参阅: SortableBytesToInt(byte[], int)

func SortableBytesToInt

func SortableBytesToInt(encoded []byte) int32

SortableBytesToInt Decodes an integer value previously written with intToSortableBytes 请参阅: IntToSortableBytes(int, byte[])

func SortableBytesToLong

func SortableBytesToLong(encoded []byte) int64

SortableBytesToLong Decodes a long value previously written with Uint64ToSortableBytes

func SortableBytesToUint64

func SortableBytesToUint64(encoded []byte) uint64

SortableBytesToUint64 Decodes a long value previously written with Uint64ToSortableBytes

func SortableFloat64Bits

func SortableFloat64Bits(bits uint64) uint64

SortableFloat64Bits Converts IEEE 754 representation of a double to sortable order (or back to the original)

func SortableUint64ToFloat64

func SortableUint64ToFloat64(encoded uint64) float64

SortableUint64ToFloat64 Converts a sortable long back to a double. 请参阅: Float64ToSortableLong

func Subtract

func Subtract(bytesPerDim, dim int, a, b, result []byte) error

Subtract Result = a - b, where a >= b, else IllegalArgumentException is thrown.

func Uint64ToSortableBytes

func Uint64ToSortableBytes(num uint64, result []byte)

Uint64ToSortableBytes Encodes an long value such that unsigned byte order comparison is consistent with Long.compare(long, long) See Also: sortableBytesToLong(byte[], int)