rgsl/
elementary_operations.rs

1//
2// A rust binding for the GSL library by Guillaume Gomez (guillaume1.gomez@gmail.com)
3//
4
5use crate::{types, Value};
6use std::mem::MaybeUninit;
7
8/// This function multiplies x and y storing the product and its associated error in result.
9#[doc(alias = "gsl_sf_multiply_e")]
10pub fn multiply_e(x: f64, y: f64) -> Result<types::Result, Value> {
11    let mut result = MaybeUninit::<sys::gsl_sf_result>::uninit();
12    let ret = unsafe { ::sys::gsl_sf_multiply_e(x, y, result.as_mut_ptr()) };
13
14    result_handler!(ret, unsafe { result.assume_init() }.into())
15}
16
17/// This function multiplies x and y with associated absolute errors dx and dy.
18/// The product xy +/- xy \sqrt((dx/x)^2 +(dy/y)^2) is stored in result.
19#[doc(alias = "gsl_sf_multiply_err_e")]
20pub fn multiply_err_e(x: f64, dx: f64, y: f64, dy: f64) -> Result<types::Result, Value> {
21    let mut result = MaybeUninit::<sys::gsl_sf_result>::uninit();
22    let ret = unsafe { ::sys::gsl_sf_multiply_err_e(x, dx, y, dy, result.as_mut_ptr()) };
23
24    result_handler!(ret, unsafe { result.assume_init() }.into())
25}