1// x11-rs: Rust bindings for X11 libraries
2// The X11 libraries are available under the MIT license.
3// These bindings are public domain.
4
5use std::cmp::min;
6use std::mem::{size_of, zeroed};
7
8//
9// public functions
10//
11
12pub unsafe fn mem_eq<T: Sized>(a: &T, b: &T) -> bool {
13 let a_addr: usize = a as *const T as usize;
14 let b_addr: usize = b as *const T as usize;
15
16 for i: usize in 0..size_of::<T>() {
17 if *((a_addr + i) as *const u8) != *((b_addr + i) as *const u8) {
18 return false;
19 }
20 }
21
22 true
23}
24
25pub unsafe fn transmute_union<I, O>(input: &I) -> O
26where
27 I: Sized,
28 O: Sized,
29{
30 let mut output: O = zeroed();
31 let copy_len: usize = min(v1:size_of::<I>(), v2:size_of::<O>());
32
33 for i: usize in 0..copy_len {
34 *((&mut output as *mut O as usize + i) as *mut u8) =
35 *((input as *const I as usize + i) as *const u8);
36 }
37
38 output
39}
40