Crate byteorder [−] [src]

This crate provides convenience methods for encoding and decoding numbers in either big-endian or little-endian order.

The organization of the crate is pretty simple. A trait, ByteOrder, specifies byte conversion methods for each type of number in Rust (sans numbers that have a platform dependent size like usize and isize). Two types, BigEndian and LittleEndian implement these methods. Finally, ReadBytesExt and WriteBytesExt provide convenience methods available to all types that implement Read and Write.

An alias, NetworkEndian, for BigEndian is provided to help improve code clarity.

An additional alias, NativeEndian, is provided for the endianness of the local platform. This is convenient when serializing data for use and conversions are not desired.

Examples

Read unsigned 16 bit big-endian integers from a Read type:

use std::io::Cursor;
use byteorder::{BigEndian, ReadBytesExt};

let mut rdr = Cursor::new(vec![2, 5, 3, 0]);
// Note that we use type parameters to indicate which kind of byte order
// we want!
assert_eq!(517, rdr.read_u16::<BigEndian>().unwrap());
assert_eq!(768, rdr.read_u16::<BigEndian>().unwrap());

Write unsigned 16 bit little-endian integers to a Write type:

use byteorder::{LittleEndian, WriteBytesExt};

let mut wtr = vec![];
wtr.write_u16::<LittleEndian>(517).unwrap();
wtr.write_u16::<LittleEndian>(768).unwrap();
assert_eq!(wtr, vec![5, 2, 0, 3]);

Optional Features

This crate optionally provides support for 128 bit values (i128 and u128) when built with the i128 feature enabled.

This crate can also be used without the standard library.

Enums

BigEndian	Defines big-endian serialization.
LittleEndian	Defines little-endian serialization.

Traits

ByteOrder	`ByteOrder` describes types that can serialize integers as bytes.
ReadBytesExt	Extends `Read` with methods for reading numbers. (For `std::io`.)
WriteBytesExt	Extends `Write` with methods for writing numbers. (For `std::io`.)

Type Definitions

BE	A type alias for `BigEndian`.
LE	A type alias for `LittleEndian`.
NativeEndian	Defines system native-endian serialization.
NetworkEndian	Defines network byte order serialization.