vmi_core/core/
hex.rs

1macro_rules! impl_base {
2    ($name:ident, $type:ty) => {
3        impl ::std::fmt::Debug for Hex<$type> {
4            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
5                impl_base_fmt(f, self.0)
6            }
7        }
8
9        impl ::std::fmt::Display for Hex<$type> {
10            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
11                impl_base_fmt(f, self.0)
12            }
13        }
14    };
15}
16
17fn impl_base_fmt<T>(f: &mut ::std::fmt::Formatter, data: T) -> ::std::fmt::Result
18where
19    T: Copy + ::std::fmt::LowerHex,
20{
21    match size_of::<T>() {
22        1 => write!(f, "0x{:02x}", data),
23        2 => write!(f, "0x{:04x}", data),
24        4 => write!(f, "0x{:08x}", data),
25        8 => write!(f, "0x{:016x}", data),
26        _ => write!(f, "0x{:x}", data),
27    }
28}
29
30macro_rules! impl_sequence {
31    ($name:ident, $type:ty) => {
32        impl ::std::fmt::Debug for Hex<$type> {
33            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
34                impl_base_sequence(f, &self.0)
35            }
36        }
37
38        impl ::std::fmt::Display for Hex<$type> {
39            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
40                impl_base_sequence(f, &self.0)
41            }
42        }
43    };
44}
45
46fn impl_base_sequence<T>(f: &mut ::std::fmt::Formatter, data: impl AsRef<[T]>) -> ::std::fmt::Result
47where
48    T: Copy + ::std::fmt::LowerHex,
49{
50    let data = data.as_ref();
51
52    if data.is_empty() {
53        return write!(f, "[]");
54    }
55
56    write!(f, "[")?;
57
58    for (index, item) in data.iter().enumerate() {
59        impl_base_fmt(f, *item)?;
60
61        if index < data.len() - 1 {
62            write!(f, ", ")?;
63        }
64    }
65
66    write!(f, "]")
67}
68
69macro_rules! impl_ops {
70    ($name:ident, $type:ty) => {
71        impl_base!($name, $type);
72        impl_sequence!($name, &Vec<$type>);
73        impl_sequence!($name, &[$type]);
74    };
75}
76
77/// A hexadecimal representation of a value.
78///
79/// This type is used to display values in hexadecimal format.
80///
81/// # Examples
82///
83/// ```
84/// # use vmi_core::Hex;
85/// assert_eq!(format!("{}", Hex(42u16)), "0x002a");
86/// ```
87pub struct Hex<T>(pub T);
88
89impl_ops!(Hex, i8);
90impl_ops!(Hex, i16);
91impl_ops!(Hex, i32);
92impl_ops!(Hex, i64);
93
94impl_ops!(Hex, u8);
95impl_ops!(Hex, u16);
96impl_ops!(Hex, u32);
97impl_ops!(Hex, u64);
98
99impl_ops!(Hex, isize);
100impl_ops!(Hex, usize);
vmi_core/core/hex.rs

vmi_core/core/
hex.rs
