package bitutil

import "git.sr.ht/~sbinet/go-arrow/bitutil"

Index ¶

• Variables
• func BitIsNotSet(buf []byte, i int) bool
• func BitIsSet(buf []byte, i int) bool
• func BytesForBits(bits int64) int64
• func CeilByte(size int) int
• func CeilByte64(size int64) int64
• func ClearBit(buf []byte, i int)
• func CountSetBits(buf []byte, offset, n int) int
• func IsMultipleOf8(v int64) bool
• func NextPowerOf2(x int) int
• func SetBit(buf []byte, i int)
• func SetBitTo(buf []byte, i int, val bool)

Variables ¶

var (
	BitMask        = [8]byte{1, 2, 4, 8, 16, 32, 64, 128}
	FlippedBitMask = [8]byte{254, 253, 251, 247, 239, 223, 191, 127}
)

Functions ¶

func BitIsNotSet ¶

func BitIsNotSet(buf []byte, i int) bool

BitIsNotSet returns true if the bit at index i in buf is not set (0).

func BitIsSet ¶

func BitIsSet(buf []byte, i int) bool

BitIsSet returns true if the bit at index i in buf is set (1).

func BytesForBits ¶

func BytesForBits(bits int64) int64

func CeilByte ¶

func CeilByte(size int) int

CeilByte rounds size to the next multiple of 8.

func CeilByte64 ¶

func CeilByte64(size int64) int64

CeilByte64 rounds size to the next multiple of 8.

func ClearBit ¶

func ClearBit(buf []byte, i int)

ClearBit sets the bit at index i in buf to 0.

func CountSetBits ¶

func CountSetBits(buf []byte, offset, n int) int

CountSetBits counts the number of 1's in buf up to n bits.

func IsMultipleOf8 ¶

func IsMultipleOf8(v int64) bool

IsMultipleOf8 returns whether v is a multiple of 8.

func NextPowerOf2 ¶

func NextPowerOf2(x int) int

NextPowerOf2 rounds x to the next power of two.

func SetBit ¶

func SetBit(buf []byte, i int)

SetBit sets the bit at index i in buf to 1.

func SetBitTo ¶

func SetBitTo(buf []byte, i int, val bool)

SetBitTo sets the bit at index i in buf to val.

Source Files ¶

bitutil.go