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## ByteSize | ||
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[](https://github.com/hyunsik/bytesize/actions/workflows/ci.yml) | ||
<!-- prettier-ignore-start --> | ||
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[](https://github.com/bytesize-rs/bytesize/actions/workflows/ci.yml) | ||
[](https://crates.io/crates/bytesize) | ||
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`ByteSize` is a utility for human-readable byte count representations. | ||
<!-- prettier-ignore-end --> | ||
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<!-- cargo-rdme start --> | ||
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`ByteSize` is a semantic wrapper for byte count representations. | ||
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Features: | ||
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- Pre-defined constants for various size units (e.g., B, Kb, Kib, Mb, Mib, Gb, Gib, ... PB). | ||
- `ByteSize` type which presents size units convertible to different size units. | ||
- Arithmetic operations for `ByteSize`. | ||
- FromStr impl for `ByteSize`, allowing to parse from string size representations like 1.5KiB and 521TiB. | ||
- `FromStr` impl for `ByteSize`, allowing for parsing string size representations like "1.5KiB" and "521TiB". | ||
- Serde support for binary and human-readable deserializers like JSON. | ||
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[API Documentation](https://docs.rs/bytesize) | ||
### Examples | ||
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## Examples | ||
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### Human readable representations (SI unit and Binary unit) | ||
Construction using SI or IEC helpers. | ||
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```rust | ||
fn assert_display(expected: &str, b: ByteSize) { | ||
assert_eq!(expected, format!("{}", b)); | ||
} | ||
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#[test] | ||
fn test_display() { | ||
assert_display("215 B", ByteSize::b(215)); | ||
assert_display("1.0 KiB", ByteSize::kib(1)); | ||
assert_display("301.0 KiB", ByteSize::kib(301)); | ||
assert_display("419.0 MiB", ByteSize::mib(419)); | ||
assert_display("518.0 GiB", ByteSize::gib(518)); | ||
assert_display("815.0 TiB", ByteSize::tib(815)); | ||
assert_display("609.0 PiB", ByteSize::pib(609)); | ||
} | ||
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#[test] | ||
fn test_display_alignment() { | ||
assert_eq!("|357 B |", format!("|{:10}|", ByteSize(357))); | ||
assert_eq!("| 357 B|", format!("|{:>10}|", ByteSize(357))); | ||
assert_eq!("|357 B |", format!("|{:<10}|", ByteSize(357))); | ||
assert_eq!("| 357 B |", format!("|{:^10}|", ByteSize(357))); | ||
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assert_eq!("|-----357 B|", format!("|{:->10}|", ByteSize(357))); | ||
assert_eq!("|357 B-----|", format!("|{:-<10}|", ByteSize(357))); | ||
assert_eq!("|--357 B---|", format!("|{:-^10}|", ByteSize(357))); | ||
} | ||
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fn assert_to_string(expected: &str, b: ByteSize, si: bool) { | ||
assert_eq!(expected.to_string(), b.to_string_as(si)); | ||
} | ||
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#[test] | ||
fn test_to_string_as() { | ||
assert_to_string("215 B", ByteSize::b(215), true); | ||
assert_to_string("215 B", ByteSize::b(215), false); | ||
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assert_to_string("1.0 KiB", ByteSize::kib(1), true); | ||
assert_to_string("1.0 KB", ByteSize::kib(1), false); | ||
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assert_to_string("293.9 KiB", ByteSize::kb(301), true); | ||
assert_to_string("301.0 KB", ByteSize::kb(301), false); | ||
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assert_to_string("1.0 MiB", ByteSize::mib(1), true); | ||
assert_to_string("1048.6 KB", ByteSize::mib(1), false); | ||
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// a bug case: https://github.com/flang-project/bytesize/issues/8 | ||
assert_to_string("1.9 GiB", ByteSize::mib(1907), true); | ||
assert_to_string("2.0 GB", ByteSize::mib(1908), false); | ||
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assert_to_string("399.6 MiB", ByteSize::mb(419), true); | ||
assert_to_string("419.0 MB", ByteSize::mb(419), false); | ||
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assert_to_string("482.4 GiB", ByteSize::gb(518), true); | ||
assert_to_string("518.0 GB", ByteSize::gb(518), false); | ||
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assert_to_string("741.2 TiB", ByteSize::tb(815), true); | ||
assert_to_string("815.0 TB", ByteSize::tb(815), false); | ||
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assert_to_string("540.9 PiB", ByteSize::pb(609), true); | ||
assert_to_string("609.0 PB", ByteSize::pb(609), false); | ||
} | ||
use bytesize::ByteSize; | ||
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assert!(ByteSize::kib(4) > ByteSize::kb(4)); | ||
``` | ||
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### Arithmetic Operations | ||
Display as human-readable string. | ||
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```rust | ||
use bytesize::ByteSize; | ||
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fn byte_arithmetic_operator() { | ||
let x = ByteSize::mb(1); | ||
let y = ByteSize::kb(100); | ||
assert_eq!("482.4 GiB", ByteSize::gb(518).to_string_as(true)); | ||
assert_eq!("518.0 GB", ByteSize::gb(518).to_string_as(false)); | ||
``` | ||
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Arithmetic operations are supported. | ||
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```rust | ||
use bytesize::ByteSize; | ||
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let plus = x + y; | ||
print!("{}", plus); | ||
let plus = ByteSize::mb(1) + ByteSize::kb(100); | ||
println!("{plus}"); | ||
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let minus = ByteSize::tb(100) + ByteSize::gb(4); | ||
print!("{}", minus); | ||
} | ||
let minus = ByteSize::tb(1) - ByteSize::gb(4); | ||
assert_eq!(ByteSize::gb(996), minus); | ||
``` | ||
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<!-- cargo-rdme end --> |
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//! Emulates running `ls -la` in the terminal, showing human-readable file sizes and file names. | ||
use std::{fs, io}; | ||
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fn main() -> io::Result<()> { | ||
let dir = fs::read_dir(".")?; | ||
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for entry in dir { | ||
let entry = entry?; | ||
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let md = entry.metadata()?; | ||
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let file_name = entry.file_name(); | ||
let file_name = file_name.to_string_lossy(); | ||
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if md.is_file() { | ||
let file_size = md.len(); | ||
let file_size = bytesize::ByteSize::b(file_size); | ||
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println!("{file_size}\t{file_name}"); | ||
} else { | ||
println!("-\t{file_name}"); | ||
} | ||
} | ||
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Ok(()) | ||
} |
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use arbitrary::{Arbitrary, Unstructured}; | ||
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use crate::ByteSize; | ||
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impl Arbitrary<'_> for ByteSize { | ||
fn arbitrary(u: &mut Unstructured<'_>) -> arbitrary::Result<Self> { | ||
Ok(ByteSize(u64::arbitrary(u)?)) | ||
} | ||
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fn size_hint(depth: usize) -> (usize, Option<usize>) { | ||
u64::size_hint(depth) | ||
} | ||
} |
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