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Serialize u32 to bytes and Deserialize u32 from bytes
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| /// idea from https://docs.rs/byteorder/1.4.3/src/byteorder/lib.rs.html | |
| #![allow(unused)] | |
| fn main() { | |
| let mut x: Vec<u8> = Vec::new(); | |
| x.reserve(16); | |
| let y: u32 = 12; | |
| unsafe { | |
| // write y to byte array | |
| std::ptr::copy_nonoverlapping( | |
| y.to_ne_bytes().as_ptr(), | |
| x.as_mut_ptr().offset(8), | |
| std::mem::size_of::<u32>(), | |
| ); | |
| // read y from byte array | |
| let mut y_bytes: [u8; 4] = [0; 4]; | |
| std::ptr::copy_nonoverlapping( | |
| x.as_ptr().offset(8), | |
| y_bytes.as_mut_ptr(), | |
| std::mem::size_of::<u32>(), | |
| ); | |
| println!("{}", std::mem::transmute::<[u8; 4], u32>(y_bytes)); | |
| } | |
| } |
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