Function writeBigU_Int64BE

lib/internal/buffer.js:610–630

(buf, value, offset, min, max)

}

function writeBigU_Int64BE(buf, value, offset, min, max) {
  checkInt(value, min, max, buf, offset, 7);

  let lo = Number(value & 0xffffffffn);
  buf[offset + 7] = lo;
  lo = lo >> 8;
  buf[offset + 6] = lo;
  lo = lo >> 8;
  buf[offset + 5] = lo;
  lo = lo >> 8;
  buf[offset + 4] = lo;
  let hi = Number(value >> 32n & 0xffffffffn);
  buf[offset + 3] = hi;
  hi = hi >> 8;
  buf[offset + 2] = hi;
  hi = hi >> 8;
  buf[offset + 1] = hi;
  hi = hi >> 8;
  buf[offset] = hi;
  return offset + 8;
}

function writeBigUInt64BE(value, offset = 0) {
  return writeBigU_Int64BE(this, value, offset, 0n, 0xffffffffffffffffn);