opensrdk-linear-algebra 0.8.5

Standard linear algebra library using blas and lapack for OpenSRDK toolchain.
Documentation 
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use crate::matrix::ge::Matrix;
use crate::number::{c64, Number};
use rayon::prelude::*;
use std::ops::Sub;

fn sub_scalar<T>(lhs: T, rhs: Matrix<T>) -> Matrix<T>
where
    T: Number,
{
    let mut rhs = rhs;

    rhs.elems
        .par_iter_mut()
        .map(|r| {
            *r = lhs - *r;
        })
        .collect::<Vec<_>>();

    rhs
}

fn sub<T>(lhs: Matrix<T>, rhs: &Matrix<T>) -> Matrix<T>
where
    T: Number,
{
    if !lhs.is_same_size(rhs) {
        panic!("Dimension mismatch.")
    }
    let mut lhs = lhs;

    lhs.elems
        .par_iter_mut()
        .zip(rhs.elems.par_iter())
        .map(|(l, &r)| {
            *l -= r;
        })
        .collect::<Vec<_>>();

    lhs
}

macro_rules! impl_sub_scalar {
    {$t: ty} => {
        impl Sub<Matrix<$t>> for $t {
          type Output = Matrix<$t>;

          fn sub(self, rhs: Matrix<$t>) -> Self::Output {
            sub_scalar(self, rhs)
          }
        }

        impl Sub<Matrix<$t>> for &$t {
          type Output = Matrix<$t>;

          fn sub(self, rhs: Matrix<$t>) -> Self::Output {
            sub_scalar(*self, rhs)
          }
        }

        impl Sub<$t> for Matrix<$t> {
          type Output = Matrix<$t>;

          fn sub(self, rhs: $t) -> Self::Output {
            -sub_scalar(rhs, self)
          }
        }

        impl Sub<&$t> for Matrix<$t> {
          type Output = Matrix<$t>;

          fn sub(self, rhs: &$t) -> Self::Output {
            -sub_scalar(*rhs, self)
          }
        }
    };
}

impl_sub_scalar! {f64}
impl_sub_scalar! {c64}

macro_rules! impl_sub {
  {$t: ty} => {
      impl Sub<Matrix<$t>> for Matrix<$t> {
        type Output = Matrix<$t>;

        fn sub(self, rhs: Matrix<$t>) -> Self::Output {
          sub(self, &rhs)
        }
      }

      impl Sub<&Matrix<$t>> for Matrix<$t> {
        type Output = Matrix<$t>;

        fn sub(self, rhs: &Matrix<$t>) -> Self::Output {
          sub(self, rhs)
        }
      }

      impl Sub<Matrix<$t>> for &Matrix<$t> {
        type Output = Matrix<$t>;

        fn sub(self, rhs: Matrix<$t>) -> Self::Output {
          -sub(rhs, self)
        }
      }
  };
}

impl_sub! {f64}
impl_sub! {c64}

#[cfg(test)]
mod tests {
    use crate::*;
    #[test]
    fn it_works() {
        let a = mat!(
            5.0, 6.0;
            7.0, 8.0
        ) - mat!(
            1.0, 3.0;
            5.0, 7.0
        );
        assert_eq!(a[(0, 0)], 4.0);
        assert_eq!(a[(0, 1)], 3.0);
        assert_eq!(a[(1, 0)], 2.0);
        assert_eq!(a[(1, 1)], 1.0);
    }
}