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#[link(name = "c_lib")]
extern {
    fn _random_init();

    fn _random_int() -> usize;
    fn _random_int_range(min: usize, max: usize) -> usize;

    fn _random_float() -> f32;
    fn _random_float_range(min: f32, max: f32) -> f32;
    
    fn _random_double() -> f64;
    fn _random_double_range(min: f64, max: f64) -> f64;
}

/// Initializes random number generator
/// Call once at startup
pub fn random_init() {
    unsafe { _random_init() }
}

/// Generates random int
/// 0 - C's MAX_RAND
pub fn random_int() -> usize {
    unsafe { _random_int() }
}

/// Generates random int between min and max
/// inclusive - exclusive
pub fn random_int_range(min: usize, max: usize) -> usize {
    unsafe { _random_int_range(min, max) }
}

/// Generates random float between 0 - 1
pub fn random_float() -> f32 {
    unsafe { _random_float() }
}

/// Generates random float between min and max
/// inclusive - exclusive
pub fn random_float_range(min: f32, max: f32) -> f32 {
    unsafe { _random_float_range(min, max) }
}

/// Generates random double between 0 - 1
pub fn random_double() -> f64 {
    unsafe { _random_double() }
}

/// Generates random double between min and max
/// inclusive - exclusive
pub fn random_double_range(min: f64, max: f64) -> f64 {
    unsafe { _random_double_range(min, max) }
}