BitFlagsJs

Make easy management bit-flags on javascripts.

install

npm i BitFlagJs

Usage

Constructor(flags)

Initializes the bitmask value with the array value passed as an argument value. Default is [0].

get()

Returns a bit-masked array of numbers.

let bitFlags = new BitFlags();
bitFlags.set(2); // [0x00000010, 0x00000000]
bitFlags.set(1); // [0x00000011, 0x00000000]
bitFlags.set(35) // [0x00000011, 0x00001000]

is(index)

Check whether the bit corresponding to the index value is masked.

let bitFlags = new BitFlags([3]); // [0x00000011]
const isMaskedFirstBit = bitFlags.is(0); // true
const isMaskedSecondBit = bitFlags.is(1); // true
const isMaskedThirdBit = bitFlags.is(2); // false

set(index)

The bit corresponding to the index value is masked.

let bitFlags = new BitFlags(); // [0x00000000]
bitFlags.set(0); // [0x00000001]
bitFlags.set(1); // [0x00000011]
bitFlags.set(4); // [0x00001011]

unset(index)

Unmask the bit corresponding to the index value.

let bitFlags = new BitFlags([3]); // [0x00000011]
bitFlags.unset(0); // [0x00000010]
bitFlags.unset(1); // [0x00000000]