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//! # Blis-sys
//! 
//! This crate provides BLAS and/or CBLAS function using [BLIS](https://github.com/flame/blis).
//! 
//! Features:
//! 
//! * `cblas`: includes cblas binding (on by default)
//! * `static`: prefer static link (be very careful with this one on Apple platforms)
//! * `system`: do not compile blis, link it from a system-wide installation instead
//! 
//! It does not provides the BLAS or CBLAS functions Rust declarations. It is meant
//! to use the ones provides by `blas-sys` and `cblas-sys` crates instead.
//! 
//! See also [blas example](tests/blas_gemm.rs) or [cblas example](tests/cblas_gemm.rs).

#[cfg(test)]
mod tests {

    extern crate libc;
    use self::libc::*;

    extern {
        pub fn bli_info_get_version_str() -> *const c_char;
        pub fn sgemm_(
            transa: *const c_char,
            transb: *const c_char,
            m: *const c_int,
            n: *const c_int,
            k: *const c_int,
            alpha: *const c_float,
            a: *const c_float,
            lda: *const c_int,
            b: *const c_float,
            ldb: *const c_int,
            beta: *const c_float,
            c: *mut c_float,
            ldc: *const c_int,
        );
    }

    #[test]
    fn it_links() {
        use std::ffi::CStr;
        unsafe {
            let s = CStr::from_ptr(bli_info_get_version_str());
            println!("blis version: {:?}", s);
        }
    }

    #[test]
    fn sgemm() {
        let a = [ 1.0 ];
        let b = [ 2.0 ];
        let mut c = [ 12.0 ];

        unsafe {
            sgemm_(
                &(b'N' as i8), &(b'N' as i8),
                &1, &1, &1,
                &1.0,
                a.as_ptr(), &1,
                b.as_ptr(), &1,
                &0.0,
                c.as_mut_ptr(), &1);
        }
        assert_eq!(&c, &[2.0]);
    }
}