1const BYTE: u64 = 1;
2const KILOBYTE: u64 = BYTE * 1000;
3const MEGABYTE: u64 = KILOBYTE * 1000;
4const GIGABYTE: u64 = MEGABYTE * 1000;
5const TERABYTE: u64 = GIGABYTE * 1000;
6
7const KILOBYTE_MINUS_ONE: u64 = KILOBYTE - 1;
8const MEGABYTE_MINUS_ONE: u64 = MEGABYTE - 1;
9const GIGABYTE_MINUS_ONE: u64 = GIGABYTE - 1;
10const TERABYTE_MINUS_ONE: u64 = TERABYTE - 1;
11
12pub fn bytes_to_human(size: u64) -> String {
13 let (unit, abbr) = match size {
14 0..=KILOBYTE_MINUS_ONE => (BYTE, "B"),
15 KILOBYTE..=MEGABYTE_MINUS_ONE => (KILOBYTE, "KB"),
16 MEGABYTE..=GIGABYTE_MINUS_ONE => (MEGABYTE, "MB"),
17 GIGABYTE..=TERABYTE_MINUS_ONE => (GIGABYTE, "GB"),
18 TERABYTE..=u64::MAX => (TERABYTE, "TB"),
19 };
20
21 let size_in_unit = size as f64 / unit as f64;
22 let dec = f64::trunc(size_in_unit.fract() * 100.0) / 100.0;
23
24 let num = format!("{:.2}", size_in_unit.trunc() + dec)
25 .trim_end_matches(['0'])
26 .trim_end_matches(['.'])
27 .to_owned();
28
29 format!("{} {}", num, abbr)
30}