rawcode

Welcome to rawcode 🎉

rawcode is a no-std-compatible, simple as-is coding. The idea is similar to bincode, but the format is even more primitive: No variable length coding, no references – just a few fixed-length types: bytes, booleans, integers, (nested) arrays/lists and StrArray.

Types

There's built-in support for:

• u8: Bytes are encoded as-is (i.e. 8 bit, network bit order)
• bool: Booleans are encoded as u8 where true => 0xFF and false => 0x00
• i8, u16, i16, u32, i32, u64, i64, u128, i128: Integers are encoded as two's-complement in little-endian representation and always use their full width (i.e. u16 = 2 bytes, i128 = 16 bytes)
• structs and arrays: Fields are concatenated and encoded in order of declaration and without any padding inbetween
• StrArray<LEN>: This is a special wrapper around [u8; LEN] which ensures that it's contents are always valid UTF-8

However please note that you can also easily implement the basic traits RawcodeConstSize + RawcodeEncode + RawcodeDecode to provide encoding and derivation for your own types/wrappers.

Example

use rawcode::{Rawcode, RawcodeConstSize, RawcodeDecode, RawcodeEncode, StrArray};

/// A named test struct
#[derive(Debug, PartialEq, Eq, Rawcode)]
struct Named {
    boolean: bool,
    i128_: i128,
    list: [u64; 7],
    strarray: StrArray<9>,
}

/// An unnamed test struct
#[derive(Debug, PartialEq, Eq, Rawcode)]
struct Unnamed(bool, i128, [u64; 7], StrArray<9>);


// Create test struct and target buffer
let raw = Named {
    boolean: true,
    i128_: -170141183460469231731687303715884105728,
    list: [0, 1, 2, 3, 4, 5, 6],
    strarray: StrArray::new(b"Testolope"),
};

// Encode the named struct
let mut buf = [0; Named::SIZE];
raw.encode(&mut buf).expect("Failed to encode struct");
let decoded = Unnamed::decode(&buf).expect("Failed to decode struct");

// Validate the decoding
assert_eq!(raw.boolean, decoded.0);
assert_eq!(raw.i128_, decoded.1);
assert_eq!(raw.list, decoded.2);
assert_eq!(raw.strarray, decoded.3);