Humanize Bytes

以二进制或十进制单位（SI或IEC）创建字节数的可读字符串表示形式。

https://en.wikipedia.org/wiki/Binary_prefix

1 KB = 1000 B 1 KiB = 1024 B

use humanize_bytes::{humanize_bytes_decimal, humanize_bytes_binary, humanize_quantity};
 
assert_eq!(humanize_bytes_binary!(0), "0 B");
assert_eq!(humanize_bytes_binary!(512), "512 B");
assert_eq!(humanize_bytes_binary!(1023), "1023 B");
assert_eq!(humanize_bytes_binary!(1024), "1 KiB");
assert_eq!(humanize_bytes_binary!(1024 + 99), "1 KiB");
assert_eq!(humanize_bytes_binary!(1024 + 103), "1.1 KiB");
assert_eq!(humanize_bytes_binary!(1024 * 1024 - 1), "1023.9 KiB");
assert_eq!(humanize_bytes_binary!(1024 * 1024), "1 MiB");
assert_eq!(humanize_bytes_binary!(1024 * 1024 * 1024), "1 GiB");

assert_eq!(humanize_bytes_decimal!(0), "0 B");
assert_eq!(humanize_bytes_decimal!(512), "512 B");
assert_eq!(humanize_bytes_decimal!(999), "999 B");
assert_eq!(humanize_bytes_decimal!(1000), "1 kB");
assert_eq!(humanize_bytes_decimal!(1000 + 99), "1 kB");
assert_eq!(humanize_bytes_decimal!(1000 + 100), "1.1 kB");
assert_eq!(humanize_bytes_decimal!(1000 * 1000 - 1), "999.9 kB");
assert_eq!(humanize_bytes_decimal!(1000 * 1000), "1 MB");
assert_eq!(humanize_bytes_decimal!(1000 * 1000 * 1000), "1 GB");

assert_eq!(humanize_quantity!(0), "0");
assert_eq!(humanize_quantity!(512), "512");
assert_eq!(humanize_quantity!(999), "999");
assert_eq!(humanize_quantity!(1000), "1 k");
assert_eq!(humanize_quantity!(1000 + 99), "1 k");
assert_eq!(humanize_quantity!(1000 + 100), "1.1 k");
assert_eq!(humanize_quantity!(1000 * 1000 - 1), "999.9 k");
assert_eq!(humanize_quantity!(1000 * 1000), "1 M");

实现细节

此 crate 有一个依赖项，smartstring，且不进行内存分配，因为所有格式化都在 MAX_INLINE 限制内，适用于 SmartString<LazyCompact>。这两个宏都返回一个 SmartString<LazyCompact>，看起来/感觉就像一个正常的 String。