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Package bits

import "math/bits"
Overview
Index

Overview ▾

Package bits implements bit counting and manipulation functions for the predeclared unsigned integer types.

Constants

UintSize is the size of a uint in bits.

const UintSize = uintSize

func LeadingZeros

func LeadingZeros(x uint) int

LeadingZeros returns the number of leading zero bits in x; the result is UintSize for x == 0.

func LeadingZeros16

func LeadingZeros16(x uint16) int

LeadingZeros16 returns the number of leading zero bits in x; the result is 16 for x == 0.

func LeadingZeros32

func LeadingZeros32(x uint32) int

LeadingZeros32 returns the number of leading zero bits in x; the result is 32 for x == 0.

func LeadingZeros64

func LeadingZeros64(x uint64) int

LeadingZeros64 returns the number of leading zero bits in x; the result is 64 for x == 0.

func LeadingZeros8

func LeadingZeros8(x uint8) int

LeadingZeros8 returns the number of leading zero bits in x; the result is 8 for x == 0.

func Len

func Len(x uint) int

Len returns the minimum number of bits required to represent x; the result is 0 for x == 0.

func Len16

func Len16(x uint16) (n int)

Len16 returns the minimum number of bits required to represent x; the result is 0 for x == 0.

func Len32

func Len32(x uint32) (n int)

Len32 returns the minimum number of bits required to represent x; the result is 0 for x == 0.

func Len64

func Len64(x uint64) (n int)

Len64 returns the minimum number of bits required to represent x; the result is 0 for x == 0.

func Len8

func Len8(x uint8) int

Len8 returns the minimum number of bits required to represent x; the result is 0 for x == 0.

func OnesCount

func OnesCount(x uint) int

OnesCount returns the number of one bits ("population count") in x.

func OnesCount16

func OnesCount16(x uint16) int

OnesCount16 returns the number of one bits ("population count") in x.

func OnesCount32

func OnesCount32(x uint32) int

OnesCount32 returns the number of one bits ("population count") in x.

func OnesCount64

func OnesCount64(x uint64) int

OnesCount64 returns the number of one bits ("population count") in x.

func OnesCount8

func OnesCount8(x uint8) int

OnesCount8 returns the number of one bits ("population count") in x.

func Reverse

func Reverse(x uint) uint

Reverse returns the value of x with its bits in reversed order.

func Reverse16

func Reverse16(x uint16) uint16

Reverse16 returns the value of x with its bits in reversed order.

func Reverse32

func Reverse32(x uint32) uint32

Reverse32 returns the value of x with its bits in reversed order.

func Reverse64

func Reverse64(x uint64) uint64

Reverse64 returns the value of x with its bits in reversed order.

func Reverse8

func Reverse8(x uint8) uint8

Reverse8 returns the value of x with its bits in reversed order.

func ReverseBytes

func ReverseBytes(x uint) uint

ReverseBytes returns the value of x with its bytes in reversed order.

func ReverseBytes16

func ReverseBytes16(x uint16) uint16

ReverseBytes16 returns the value of x with its bytes in reversed order.

func ReverseBytes32

func ReverseBytes32(x uint32) uint32

ReverseBytes32 returns the value of x with its bytes in reversed order.

func ReverseBytes64

func ReverseBytes64(x uint64) uint64

ReverseBytes64 returns the value of x with its bytes in reversed order.

func RotateLeft

func RotateLeft(x uint, k int) uint

RotateLeft returns the value of x rotated left by (k mod UintSize) bits. To rotate x right by k bits, call RotateLeft(x, -k).

func RotateLeft16

func RotateLeft16(x uint16, k int) uint16

RotateLeft16 returns the value of x rotated left by (k mod 16) bits. To rotate x right by k bits, call RotateLeft16(x, -k).

func RotateLeft32

func RotateLeft32(x uint32, k int) uint32

RotateLeft32 returns the value of x rotated left by (k mod 32) bits. To rotate x right by k bits, call RotateLeft32(x, -k).

func RotateLeft64

func RotateLeft64(x uint64, k int) uint64

RotateLeft64 returns the value of x rotated left by (k mod 64) bits. To rotate x right by k bits, call RotateLeft64(x, -k).

func RotateLeft8

func RotateLeft8(x uint8, k int) uint8

RotateLeft8 returns the value of x rotated left by (k mod 8) bits. To rotate x right by k bits, call RotateLeft8(x, -k).

func TrailingZeros

func TrailingZeros(x uint) int

TrailingZeros returns the number of trailing zero bits in x; the result is UintSize for x == 0.

func TrailingZeros16

func TrailingZeros16(x uint16) (n int)

TrailingZeros16 returns the number of trailing zero bits in x; the result is 16 for x == 0.

func TrailingZeros32

func TrailingZeros32(x uint32) int

TrailingZeros32 returns the number of trailing zero bits in x; the result is 32 for x == 0.

func TrailingZeros64

func TrailingZeros64(x uint64) int

TrailingZeros64 returns the number of trailing zero bits in x; the result is 64 for x == 0.

func TrailingZeros8

func TrailingZeros8(x uint8) int

TrailingZeros8 returns the number of trailing zero bits in x; the result is 8 for x == 0.