byteserde/utils/numerics/
be_bytes.rs

1pub trait ToBeBytes<const N: usize> {
2    fn to_bytes(&self) -> [u8; N];
3}
4
5/// calling
6///     impl_ToBeBytes!(i16, 2);
7/// will generate
8///     impl crate::utils::numerics::be_bytes::ToBeBytes<2> for i16 {
9///         fn to_bytes(&self) -> [u8; 2] {
10///             self.to_le_bytes()
11///         }
12///     }
13macro_rules! impl_ToBeBytes {
14    ($name:ty, $len:expr) => {
15        impl $crate::utils::numerics::be_bytes::ToBeBytes<$len> for $name {
16            #[inline]
17            fn to_bytes(&self) -> [u8; $len] {
18                self.to_be_bytes()
19            }
20        }
21    };
22}
23const USIZE: usize = std::mem::size_of::<usize>();
24impl_ToBeBytes!(u16, 2);
25impl_ToBeBytes!(i16, 2);
26impl_ToBeBytes!(u32, 4);
27impl_ToBeBytes!(i32, 4);
28impl_ToBeBytes!(u64, 8);
29impl_ToBeBytes!(i64, 8);
30impl_ToBeBytes!(u128, 16);
31impl_ToBeBytes!(i128, 16);
32impl_ToBeBytes!(f32, 4);
33impl_ToBeBytes!(f64, 8);
34impl_ToBeBytes!(usize, USIZE);
35impl_ToBeBytes!(isize, USIZE);
36// //////////////////////////////////////////////////////////////////////
37
38pub trait FromBeBytes<const N: usize, T> {
39    fn from_bytes(v: [u8; N]) -> T;
40    fn from_bytes_ref(v: &[u8; N]) -> T;
41}
42
43/// calling
44///     impl_FromBeBytes!(i16, 2);
45/// will generate
46///     impl crate::utils::numerics::be_bytes::FromBeBytes<2, i16> for i16 {
47///         fn from_bytes(v: [u8; 2]) -> i16 {
48///             i16::from_be_bytes(v)
49///         }
50///     }
51macro_rules! impl_FromBeBytes {
52    ($name:ty, $len:expr) => {
53        impl $crate::utils::numerics::be_bytes::FromBeBytes<$len, $name> for $name {
54            #[inline]
55            fn from_bytes(v: [u8; $len]) -> $name {
56                <$name>::from_be_bytes(v)
57            }
58            #[inline]
59            fn from_bytes_ref(v: &[u8; $len]) -> $name {
60                <$name>::from_be_bytes(*v)
61            }
62        }
63    };
64}
65
66impl_FromBeBytes!(u16, 2);
67impl_FromBeBytes!(i16, 2);
68impl_FromBeBytes!(u32, 4);
69impl_FromBeBytes!(i32, 4);
70impl_FromBeBytes!(u64, 8);
71impl_FromBeBytes!(i64, 8);
72impl_FromBeBytes!(u128, 16);
73impl_FromBeBytes!(i128, 16);
74impl_FromBeBytes!(f32, 4);
75impl_FromBeBytes!(f64, 8);
76impl_FromBeBytes!(usize, USIZE);
77impl_FromBeBytes!(isize, USIZE);
78// //////////////////////////////////////////////////////////////////////
79#[cfg(test)]
80mod tests {
81    use super::*;
82    use crate::unittest::setup;
83    use log::info;
84
85    #[test]
86    fn test_u16() {
87        setup::log::configure();
88        let inp = 0xAA00_u16;
89        let byt = inp.to_bytes();
90        let out = u16::from_bytes(byt);
91        info! {"inp: {inp}"}
92        info!("inp: {inp}, inp:x {inp:#06x}, inp:b {inp:016b}");
93        info!("out: {out}, out:x {out:#06x}, inp:b {out:016b}");
94        info!("byt:x 0x{byt0:02x}{byt1:02x}, out:b {byt0:08b}{byt1:08b}", byt0 = byt[0], byt1 = byt[1]);
95        assert_eq!(byt, [0xAA_u8, 0x00_u8]);
96        assert_eq!(inp, out);
97    }
98}
byteserde/utils/numerics/be_bytes.rs

byteserde/utils/numerics/
be_bytes.rs
