TransmuteMemory

lib.rs

#![feature(core)]
extern crate "rustc-serialize" as serialize;
use std::mem::{size_of, transmute};
use std::slice::bytes::copy_memory;
use serialize::hex::ToHex;

pub fn transmute_memory<D: Sized, S: Sized>(dst: &mut D, src: &S) {
    unsafe {
        let size = size_of::<S>();
        assert_eq!(size_of::<D>(), size);
        let d = transmute::<(&mut D, usize), &mut [u8]>((dst, size));
        let s = transmute::<(&S, usize), &[u8]>((src, size));
        copy_memory(d, s);
    }
}