Yes, the C and C++ unsigned types are analogous to Rust's Wrapping<u8> Wrapping<u16> Wrapping<u32> and so on, except that their size isn't nailed down by the IS

Yes, the C and C++ unsigned types are analogous to Rust's Wrapping<u8> Wrapping<u16> Wrapping<u32> and so on, except that their size isn't nailed down by the ISO document.