Function to_fixed

pub fn to_fixed(x: f64, m: i32, n: i32, round: bool) -> Result<Q, String>

Convert x (f64) into fixed point format (Qm.n), if possible.

use fixed2float::{to_Q, Q};
use fixed2float::to_fixed;
assert_eq!(
    to_Q(1.5, 1, 3, true),
    Ok(
        Q {
            val: 0b1100,
            m: 1,
            n: 3,
            is_exact: true,
        }
    )
);
assert_eq!(
    to_Q(-2.5, 3, 3, true),
    Ok(
        Q {
            val: 0b1101100,
            m: 3,
            n: 3,
            is_exact: true,
        }
    )
);
assert_eq!(to_Q(1.5, 1, 3, true).unwrap().val, 0b1100);
assert_eq!(to_Q(0.0, 1, 5, true).unwrap().val, 0);
assert_eq!(to_Q(1.5, 1, 3, true).unwrap().is_exact, true);

assert_eq!(to_fixed(-2.5, 3, 3, false).unwrap().val, 108);