parallel_disk_usage/
size.rs

1use super::bytes_format::{self, BytesFormat};
2use derive_more::{Add, AddAssign, From, Into, Sum};
3use std::{
4    fmt::{Debug, Display},
5    iter::Sum,
6    ops::{Add, AddAssign, Mul, MulAssign},
7};
8
9#[cfg(feature = "json")]
10use serde::{Deserialize, Serialize};
11
12/// Types whose values can be used as disk usage statistic.
13pub trait Size:
14    Debug
15    + Default
16    + Clone
17    + Copy
18    + PartialEq
19    + Eq
20    + PartialOrd
21    + Ord
22    + Add<Output = Self>
23    + AddAssign
24    + Sum
25{
26    /// Underlying type
27    type Inner: From<Self> + Into<Self> + Mul<Self, Output = Self>;
28    /// Format to be used to [`display`](Size::display) the value.
29    type DisplayFormat: Copy;
30    /// Return type of [`display`](Size::display).
31    type DisplayOutput: Display;
32    /// Display the disk usage in a measurement system.
33    fn display(self, input: Self::DisplayFormat) -> Self::DisplayOutput;
34}
35
36macro_rules! newtype {
37    (
38        $(#[$attribute:meta])*
39        $name:ident = $inner:ty;
40        display: ($display_format:ty) -> $display_output:ty = $display_impl:expr;
41    ) => {
42        #[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
43        #[derive(From, Into, Add, AddAssign, Sum)]
44        #[cfg_attr(feature = "json", derive(Deserialize, Serialize))]
45        $(#[$attribute])*
46        pub struct $name($inner);
47
48        impl $name {
49            pub const fn new(inner: $inner) -> Self {
50                $name(inner)
51            }
52
53            pub const fn inner(self) -> $inner {
54                self.0
55            }
56        }
57
58        impl Size for $name {
59            type Inner = $inner;
60            type DisplayFormat = $display_format;
61            type DisplayOutput = $display_output;
62            fn display(self, format: Self::DisplayFormat) -> Self::DisplayOutput {
63                let display: fn(Self, Self::DisplayFormat) -> Self::DisplayOutput = $display_impl;
64                display(self, format)
65            }
66        }
67
68        impl Mul<$inner> for $name {
69            type Output = Self;
70            fn mul(self, rhs: $inner) -> Self::Output {
71                self.0.mul(rhs).into()
72            }
73        }
74
75        impl Mul<$name> for $inner {
76            type Output = $name;
77            fn mul(self, rhs: $name) -> Self::Output {
78                rhs * self
79            }
80        }
81
82        impl MulAssign<$inner> for $name {
83            fn mul_assign(&mut self, rhs: $inner) {
84                self.0 *= rhs;
85            }
86        }
87    };
88}
89
90newtype!(
91    /// Number of bytes.
92    Bytes = u64;
93    display: (BytesFormat) -> bytes_format::Output = |bytes, format| {
94        format.format(bytes.into())
95    };
96);
97
98newtype!(
99    /// Number of blocks.
100    Blocks = u64;
101    display: (()) -> u64 = |blocks, ()| blocks.inner();
102);
parallel_disk_usage/size.rs

parallel_disk_usage/
size.rs
