Function spral_random_matrix_generate_long 

pub unsafe extern "C" fn spral_random_matrix_generate_long(
    state: *mut c_int,
    matrix_type: spral_matrix_type,
    m: c_int,
    n: c_int,
    nnz: i64,
    ptr: *mut i64,
    row: *mut c_int,
    val: *mut f64,
    flags: c_int,
) -> c_int