ntex_bytes/
hex.rs

1use crate::{Bytes, BytesMut, BytesVec};
2use std::fmt::{Formatter, LowerHex, Result, UpperHex};
3
4struct BytesRef<'a>(&'a [u8]);
5
6impl LowerHex for BytesRef<'_> {
7    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
8        for b in self.0 {
9            write!(f, "{b:02x}")?;
10        }
11        Ok(())
12    }
13}
14
15impl UpperHex for BytesRef<'_> {
16    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
17        for b in self.0 {
18            write!(f, "{b:02X}")?;
19        }
20        Ok(())
21    }
22}
23
24macro_rules! hex_impl {
25    ($tr:ident, $ty:ty) => {
26        impl $tr for $ty {
27            fn fmt(&self, f: &mut Formatter<'_>) -> Result {
28                $tr::fmt(&BytesRef(self.as_ref()), f)
29            }
30        }
31    };
32}
33
34hex_impl!(LowerHex, Bytes);
35hex_impl!(LowerHex, BytesMut);
36hex_impl!(LowerHex, BytesVec);
37hex_impl!(UpperHex, Bytes);
38hex_impl!(UpperHex, BytesMut);
39hex_impl!(UpperHex, BytesVec);
40
41#[cfg(test)]
42mod tests {
43    use super::*;
44
45    #[test]
46    fn hex() {
47        let b = Bytes::from_static(b"hello world");
48        let f = format!("{b:x}");
49        assert_eq!(f, "68656c6c6f20776f726c64");
50        let f = format!("{b:X}");
51        assert_eq!(f, "68656C6C6F20776F726C64");
52    }
53}
ntex_bytes/hex.rs

ntex_bytes/
hex.rs
