Function gmsh_sys::gmshOnelabGetNumber

pub unsafe extern "C" fn gmshOnelabGetNumber(
    name: *const c_char, 
    value: *mut *mut f64, 
    value_n: *mut usize, 
    ierr: *mut c_int
)

Get the value of the number parameter name from the ONELAB database. Return an empty vector if the parameter does not exist.