1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*!
# Byte Unit

A library for interaction with units of bytes. The units are **B** for 1 byte, **KB** for 1000 bytes, **KiB** for 1024 bytes, **MB** for 1000000 bytes, **MiB** for 1048576 bytes, etc, and up to **ZiB** which is 1180591620717411303424 bytes.

The data type for storing the size of bytes is `u128` by default, but can also be changed to `u64` by disabling the default features (it will also cause the highest supported unit down to **PiB**).

## Usage

### Macros

There are `n_*_bytes` macros can be used. The star `*` means the unit. For example, `n_gb_bytes` can be used to get a **n-GB** value in bytes.

```rust
#[macro_use] extern crate byte_unit;

let result = n_gb_bytes!(4);

assert_eq!(4000000000, result);
```

You may need to assign a primitive type if the `n` is not an integer.

```rust
#[macro_use] extern crate byte_unit;

let result = n_gb_bytes!(2.5, f64);

assert_eq!(2500000000, result);
```

### Byte

The `Byte` structure can be used for representing a size of bytes.

The `from_str` associated function can parse any **SIZE** string and return a `Byte` instance in common usage. The format of a **SIZE** string is like "123", "123KiB" or "50.84 MB".

```rust
extern crate byte_unit;

use byte_unit::Byte;

let result = Byte::from_str("50.84 MB").unwrap();

assert_eq!(50840000, result.get_bytes());
```

You can also use the `from_bytes` and `from_unit` associated functions to create a `Byte` instance.

```rust
extern crate byte_unit;

use byte_unit::Byte;

let result = Byte::from_bytes(1500000);

assert_eq!(1500000, result.get_bytes());
```

```rust
extern crate byte_unit;

use byte_unit::{Byte, ByteUnit};

let result = Byte::from_unit(1500f64, ByteUnit::KB).unwrap();

assert_eq!(1500000, result.get_bytes());
```

### AdjustedByte

To change the unit of a `Byte` instance, you can use the `get_adjusted_unit` method.

```rust
extern crate byte_unit;

use byte_unit::{Byte, ByteUnit};

let byte = Byte::from_str("123KiB").unwrap();

let adjusted_byte = byte.get_adjusted_unit(ByteUnit::KB);

assert_eq!("125.95 KB", adjusted_byte.to_string());
```

To change the unit of a `Byte` instance automatically and appropriately, you can use the `get_appropriate_unit` method.

```rust
extern crate byte_unit;

use byte_unit::Byte;

let byte = Byte::from_bytes(1500000);

let adjusted_byte = byte.get_appropriate_unit(false);

assert_eq!("1.50 MB", adjusted_byte.to_string());
```

```rust
extern crate byte_unit;

use byte_unit::Byte;

let byte = Byte::from_bytes(1500000);

let adjusted_byte = byte.get_appropriate_unit(true);

assert_eq!("1.43 MiB", adjusted_byte.to_string());
```

The number of fractional digits created by the `to_string` method of a `AdjustedByte` instance is `2` unless the `ByteUnit` is `B`.

To change the number of fractional digits in the formatted string, you can use the `format` method instead.

```rust
extern crate byte_unit;

use byte_unit::Byte;

let byte = Byte::from_bytes(1500000);

let adjusted_byte = byte.get_appropriate_unit(false);

assert_eq!("1.5 MB", adjusted_byte.format(1));
```
*/

#![cfg_attr(not(feature = "std"), no_std)]

#[macro_use]
extern crate alloc;

#[cfg(feature = "u128")]
#[macro_use]
mod u128;

#[cfg(not(feature = "u128"))]
#[macro_use]
mod u64;

#[macro_use]
mod macros;

mod adjusted_byte;
mod byte;
mod byte_error;
mod byte_unit;

#[cfg(feature = "u128")]
pub use self::u128::*;

#[cfg(not(feature = "u128"))]
pub use self::u64::*;

pub use self::byte_unit::*;
pub use adjusted_byte::*;
pub use byte::*;
pub use byte_error::*;