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docs: use cargo-rdme to match readme to tested docs (#68)
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robjtede authored Feb 10, 2025
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5 changes: 5 additions & 0 deletions .prettierrc.yml
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overrides:
- files: '*.md'
options:
proseWrap: never
printWidth: 9999
106 changes: 29 additions & 77 deletions README.md
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## ByteSize

[![CI](https://github.com/hyunsik/bytesize/actions/workflows/ci.yml/badge.svg)](https://github.com/hyunsik/bytesize/actions/workflows/ci.yml)
<!-- prettier-ignore-start -->

[![CI](https://github.com/bytesize-rs/bytesize/actions/workflows/ci.yml/badge.svg)](https://github.com/bytesize-rs/bytesize/actions/workflows/ci.yml)
[![Crates.io Version](https://img.shields.io/crates/v/bytesize.svg)](https://crates.io/crates/bytesize)

`ByteSize` is a utility for human-readable byte count representations.
<!-- prettier-ignore-end -->

<!-- cargo-rdme start -->

`ByteSize` is a semantic wrapper for byte count representations.

Features:

- 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.

[API Documentation](https://docs.rs/bytesize)
### Examples

## Examples

### Human readable representations (SI unit and Binary unit)
Construction using SI or IEC helpers.

```rust
fn assert_display(expected: &str, b: ByteSize) {
assert_eq!(expected, format!("{}", b));
}

#[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));
}

#[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)));

assert_eq!("|-----357 B|", format!("|{:->10}|", ByteSize(357)));
assert_eq!("|357 B-----|", format!("|{:-<10}|", ByteSize(357)));
assert_eq!("|--357 B---|", format!("|{:-^10}|", ByteSize(357)));
}

fn assert_to_string(expected: &str, b: ByteSize, si: bool) {
assert_eq!(expected.to_string(), b.to_string_as(si));
}

#[test]
fn test_to_string_as() {
assert_to_string("215 B", ByteSize::b(215), true);
assert_to_string("215 B", ByteSize::b(215), false);

assert_to_string("1.0 KiB", ByteSize::kib(1), true);
assert_to_string("1.0 KB", ByteSize::kib(1), false);

assert_to_string("293.9 KiB", ByteSize::kb(301), true);
assert_to_string("301.0 KB", ByteSize::kb(301), false);

assert_to_string("1.0 MiB", ByteSize::mib(1), true);
assert_to_string("1048.6 KB", ByteSize::mib(1), false);

// 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);

assert_to_string("399.6 MiB", ByteSize::mb(419), true);
assert_to_string("419.0 MB", ByteSize::mb(419), false);

assert_to_string("482.4 GiB", ByteSize::gb(518), true);
assert_to_string("518.0 GB", ByteSize::gb(518), false);

assert_to_string("741.2 TiB", ByteSize::tb(815), true);
assert_to_string("815.0 TB", ByteSize::tb(815), false);

assert_to_string("540.9 PiB", ByteSize::pb(609), true);
assert_to_string("609.0 PB", ByteSize::pb(609), false);
}
use bytesize::ByteSize;

assert!(ByteSize::kib(4) > ByteSize::kb(4));
```

### Arithmetic Operations
Display as human-readable string.

```rust
use bytesize::ByteSize;

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));
```

Arithmetic operations are supported.

```rust
use bytesize::ByteSize;

let plus = x + y;
print!("{}", plus);
let plus = ByteSize::mb(1) + ByteSize::kb(100);
println!("{plus}");

let minus = ByteSize::tb(100) + ByteSize::gb(4);
print!("{}", minus);
}
let minus = ByteSize::tb(1) - ByteSize::gb(4);
assert_eq!(ByteSize::gb(996), minus);
```

<!-- cargo-rdme end -->
6 changes: 6 additions & 0 deletions justfile
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# fd --hidden --type=file -e=md -e=yml --exec-batch prettier --write
cargo +nightly fmt

# Update READMEs from crate root documentation.
[group("lint")]
update-readme:
cargo rdme --force
npx -y prettier --write README.md

# Lint workspace with Clippy.
[group("lint")]
clippy:
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41 changes: 27 additions & 14 deletions src/lib.rs
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//! ByteSize is an utility that easily makes bytes size representation
//! and helps its arithmetic operations.
//! `ByteSize` is a semantic wrapper for byte count representations.
//!
//! ## Example
//! Features:
//!
//! ```ignore
//! use bytesize::ByteSize;
//! - 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 for parsing string size representations like "1.5KiB"
//! and "521TiB".
//! - Serde support for binary and human-readable deserializers like JSON.
//!
//! # Examples
//!
//! fn byte_arithmetic_operator() {
//! let x = ByteSize::mb(1);
//! let y = ByteSize::kb(100);
//! Construction using SI or IEC helpers.
//!
//! let plus = x + y;
//! print!("{} bytes", plus.as_u64());
//! ```
//! use bytesize::ByteSize;
//!
//! let minus = ByteSize::tb(100) - ByteSize::gb(4);
//! print!("{} bytes", minus.as_u64());
//! }
//! assert!(ByteSize::kib(4) > ByteSize::kb(4));
//! ```
//!
//! It also provides its human readable string as follows:
//! Display as human-readable string.
//!
//! ```
//! use bytesize::ByteSize;
//!
//! assert_eq!("482.4 GiB", ByteSize::gb(518).to_string_as(true));
//! assert_eq!("518.0 GB", ByteSize::gb(518).to_string_as(false));
//! ```
//!
//! Arithmetic operations are supported.
//!
//! ```
//! use bytesize::ByteSize;
//!
//! let plus = ByteSize::mb(1) + ByteSize::kb(100);
//! println!("{plus}");
//!
//! let minus = ByteSize::tb(1) - ByteSize::gb(4);
//! assert_eq!(ByteSize::gb(996), minus);
//! ```
mod parse;
#[cfg(feature = "serde")]
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