Jcd.BitManipulation

Jcd.BitManipulation.Algorithms.UInt64AlgorithmsExtensions

UInt64AlgorithmsExtensions.RotateLeft(this ulong, int) Method

Performs a bitwise left rotation on a number.

public static ulong RotateLeft(this ulong number, int count);

Parameters

number System.UInt64

The number to rotate

count System.Int32

the number of bits to rotate

Returns

System.UInt64 The rotated value.

Example

var rotationBase = sizeof(int)-5;

ulong b = 0b00000000_00000000_00000000_00000000_00000000_00000000_00000000_00001111;

var b2 = b.RotateLeft(rotationBase+0); // b2 = 0b01111000_00000000_00000000_00000000_00000000_00000000_00000000_00000000
var b3 = b.RotateLeft(rotationBase+1); // b3 = 0b11110000_00000000_00000000_00000000_00000000_00000000_00000000_00000000
var b4 = b.RotateLeft(rotationBase+2); // b4 = 0b11100000_00000000_00000000_00000000_00000000_00000000_00000000_00000001
var b5 = b.RotateLeft(rotationBase+3); // b5 = 0b11000000_00000000_00000000_00000000_00000000_00000000_00000000_00000011
var b6 = b.RotateLeft(rotationBase+4); // b6 = 0b10000000_00000000_00000000_00000000_00000000_00000000_00000000_00000111
var b7 = b.RotateLeft(rotationBase+5); // b7 = 0b00000000_00000000_00000000_00000000_00000000_00000000_00000000_00001111