Function lpsolve_sys::mat_get_data

pub unsafe extern "C" fn mat_get_data(
    lp: *mut lprec, 
    matindex: c_int, 
    isrow: c_uchar, 
    rownr: *mut *mut c_int, 
    colnr: *mut *mut c_int, 
    value: *mut *mut c_double
) -> c_uchar