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//
// A rust binding for the GSL library by Guillaume Gomez (guillaume1.gomez@gmail.com)
//

use crate::{types, Value};
use std::mem::MaybeUninit;

/// This function multiplies x and y storing the product and its associated error in result.
#[doc(alias = "gsl_sf_multiply_e")]
pub fn multiply_e(x: f64, y: f64) -> Result<types::Result, Value> {
    let mut result = MaybeUninit::<sys::gsl_sf_result>::uninit();
    let ret = unsafe { ::sys::gsl_sf_multiply_e(x, y, result.as_mut_ptr()) };

    result_handler!(ret, unsafe { result.assume_init() }.into())
}

/// This function multiplies x and y with associated absolute errors dx and dy.
/// The product xy +/- xy \sqrt((dx/x)^2 +(dy/y)^2) is stored in result.
#[doc(alias = "gsl_sf_multiply_err_e")]
pub fn multiply_err_e(x: f64, dx: f64, y: f64, dy: f64) -> Result<types::Result, Value> {
    let mut result = MaybeUninit::<sys::gsl_sf_result>::uninit();
    let ret = unsafe { ::sys::gsl_sf_multiply_err_e(x, dx, y, dy, result.as_mut_ptr()) };

    result_handler!(ret, unsafe { result.assume_init() }.into())
}