wd_tools/common/
infra.rs

1pub trait AsBytes {
2    fn as_byte(&self) -> &[u8];
3}
4
5macro_rules! number_default_for_as_bytes {
6    ($($b:tt,$n:tt);*) => {
7        $(
8        impl AsBytes for $b
9        {
10            fn as_byte(&self) -> &[u8] {
11                unsafe {
12                    &*(self as *const $b as *const [u8;$n])
13                }
14            }
15        }
16        )*
17
18    };
19}
20
21number_default_for_as_bytes!(u8,1;u16,2;u32,4;u64,8;u128,16;i8,1;i16,2;i32,4;i64,8;i128,16);
22
23#[cfg(target_pointer_width = "64")]
24impl AsBytes for usize {
25    fn as_byte(&self) -> &[u8] {
26        unsafe { &*(self as *const usize as *const [u8; 8]) }
27    }
28}
29#[cfg(target_pointer_width = "32")]
30impl AsBytes for usize {
31    fn as_byte(&self) -> &[u8] {
32        unsafe { &*(self as *const usize as *const [u8; 4]) }
33    }
34}
35#[cfg(target_pointer_width = "64")]
36impl AsBytes for isize {
37    fn as_byte(&self) -> &[u8] {
38        unsafe { &*(self as *const isize as *const [u8; 8]) }
39    }
40}
41#[cfg(target_pointer_width = "32")]
42impl AsBytes for isize {
43    fn as_byte(&self) -> &[u8] {
44        unsafe { &*(self as *const isize as *const [u8; 4]) }
45    }
46}
47
48impl AsBytes for Vec<u8> {
49    fn as_byte(&self) -> &[u8] {
50        self.as_slice()
51    }
52}
53
54impl AsBytes for [u8] {
55    fn as_byte(&self) -> &[u8] {
56        self
57    }
58}
59impl AsBytes for &str {
60    fn as_byte(&self) -> &[u8] {
61        self.as_bytes()
62    }
63}
64impl AsBytes for &[char] {
65    fn as_byte(&self) -> &[u8] {
66        unsafe { std::mem::transmute(*self) }
67    }
68}
69impl AsBytes for Vec<char> {
70    fn as_byte(&self) -> &[u8] {
71        let cs = self.as_slice();
72        unsafe { std::mem::transmute(cs) }
73    }
74}
75
76impl<T> AsBytes for &T
77where
78    T: AsBytes,
79{
80    fn as_byte(&self) -> &[u8] {
81        (*self).as_byte()
82    }
83}
wd_tools/common/infra.rs

wd_tools/common/
infra.rs
