Function double_to_fix64

pub extern "C" fn double_to_fix64(v: f64, n: i32) -> i64

Converts an f64 to a signed fixed point 64-bit integer representation where n specifies the position of the binary point in the resulting fixed point representation - e.g. f(0.5f, 16) == 0x8000. This method rounds towards -Infinity, and clamps the resulting integer to lie within the range -0x8000000000000000 to 0x7FFFFFFFFFFFFFFF