Function writeInt64

unreal/Puerts/Content/JavaScript/ffi/buffer-ext.js:266–281

(buff, val, offset = 0)

}

function writeInt64(buff, val, offset = 0) {
  val = +val;
  if (typeof val === 'number') val = BigInt(val);
  checkBounds(buff, offset, 7);

  bigInt64Array[0] = val;
  buff[offset++] = uint8BigInt64Array[0];
  buff[offset++] = uint8BigInt64Array[1];
  buff[offset++] = uint8BigInt64Array[2];
  buff[offset++] = uint8BigInt64Array[3];
  buff[offset++] = uint8BigInt64Array[4];
  buff[offset++] = uint8BigInt64Array[5];
  buff[offset++] = uint8BigInt64Array[6];
  buff[offset++] = uint8BigInt64Array[7];
  return offset;
}

const bigUint64Array = new BigUint64Array(1);
const uint8BigUint64Array = new Uint8Array(bigUint64Array.buffer);