@moon7/bits/dist/index.js

Type-safe bitwise operations for JavaScript and TypeScript with named bit collections

const ALL = -1 >>> 0;
const NONE = 0;
function bitMask(i) {
  return 1 << i >>> 0;
}
function checkMask(bits, mask) {
  return (bits & mask) !== 0;
}
function applyMask(bits, mask) {
  return (bits | mask) >>> 0;
}
function clearMask(bits, mask) {
  return bits & ~mask;
}
function toggleMask(bits, mask) {
  return (bits ^ mask) >>> 0;
}
function getBit(bits, index) {
  return checkMask(bits, bitMask(index));
}
function setBit(bits, index, value) {
  return value ? setBitOn(bits, index) : setBitOff(bits, index);
}
function setBitOn(bits, index) {
  return applyMask(bits, bitMask(index));
}
function setBitOff(bits, index) {
  return clearMask(bits, bitMask(index));
}
function toggleBit(bits, index) {
  return toggleMask(bits, bitMask(index));
}
function toBinaryString(bits, length = 32) {
  return bits.toString(2).padStart(length, "0");
}
function toFormattedBinaryString(bits, length = 32) {
  var _a;
  const str = toBinaryString(bits, length);
  return ((_a = str.match(/.{1,8}/g)) == null ? void 0 : _a.map((x) => {
    var _a2;
    return (_a2 = x.match(/.{1,4}/g)) == null ? void 0 : _a2.join(" ");
  }).join(" - ")) ?? "";
}
function countBits(bits) {
  let count = 0;
  let value = bits;
  while (value) {
    count += value & 1;
    value >>>= 1;
  }
  return count;
}
function isSingleBit(bits) {
  return bits !== 0 && (bits & bits - 1) === 0;
}
function defineBitFlags(definition) {
  const result = { ...definition };
  result.mask = (name) => bitMask(result[name]);
  return result;
}
function defineBitEnum(...names) {
  const result = {};
  names.forEach((name, index) => result[name] = index);
  result.mask = (name) => bitMask(result[name]);
  return result;
}
export {
  ALL,
  NONE,
  applyMask,
  bitMask,
  checkMask,
  clearMask,
  countBits,
  defineBitEnum,
  defineBitFlags,
  getBit,
  isSingleBit,
  setBit,
  setBitOff,
  setBitOn,
  toBinaryString,
  toFormattedBinaryString,
  toggleBit,
  toggleMask
};
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