ubyte[9] data;
assert(ionPutR(data.ptr + data.length, -16.0) == 9);
assert(data[0] == 0x48);
assert(data[1] == 0xC0);
assert(data[2] == 0x30);
assert(data[3] == 0x00);
assert(data[4] == 0x00);
assert(data[5] == 0x00);
assert(data[6] == 0x00);
assert(data[7] == 0x00);
assert(data[8] == 0x00);

assert(ionPutR(data.ptr + data.length, 0.0) == 1);
assert(data[$ - 1] == 0x40);

assert(ionPutR(data.ptr + data.length, -0.0) == 9);
assert(data[0] == 0x48);
assert(data[1] == 0x80);
assert(data[2] == 0x00);
assert(data[3] == 0x00);
assert(data[4] == 0x00);
assert(data[5] == 0x00);
assert(data[6] == 0x00);
assert(data[7] == 0x00);
assert(data[8] == 0x00);