use super::*;
use std::cmp;
use std::ptr;


/// Copy bytes from one slice to another.
///
/// # Notes
/// The slices can overlap.
#[inline] pub fn move_bytes(from: &[u8], to: &mut [u8]) -> usize
{
    let len = cmp::min(from.len(), to.len());
    unsafe {
	ptr::copy(from.as_ptr(), to.as_mut_ptr(), len);
    }
    len
}

/// Copy bytes from one slice to another.
///
/// # Notes
/// The slices must *not* overlap.
#[inline] pub fn copy_bytes(from: &[u8], to: &mut [u8]) -> usize
{
    let len = cmp::min(from.len(), to.len());
    unsafe {
	ptr::copy_nonoverlapping(from.as_ptr(), to.as_mut_ptr(), len);
    }
    len
}