Doc

This library used to serialize and deserialize structured data in binary format.

Examples

toml [dependencies] databuf = "0.3"

```rust use databuf::{*, config::num::LE};

[derive(Encode, Decode)]

struct Car<'a> { year: u16, is_new: bool, name: &'a str, }

[derive(Encode, Decode)]

struct Company<'a> { name: String, cars: Vec> }

let old = Company { name: "Tesla".into(), cars: vec![ Car { name: "Model S", year: 2018, isnew: true }, Car { name: "Model X", year: 2019, isnew: false }, ], }; let bytes = old.tobytes::(); let new = Company::frombytes::(&bytes).unwrap(); ```

Vec, String, &[T], &str etc.. are encoded with their length value first, Following by each entry.

By default, length of collections is represented with BEU30.

```rust use databuf::{*, config::num::LE};

[derive(Encode, Decode)]

struct Msg<'a> { id: u16, data: &'a str, } let bytes = [42, 0, 13, 72, 101, 108, 108, 111, 44, 32, 87, 111, 114, 108, 100, 33]; // ^^^^^ ^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ // Id Len Data

let msg = Msg::frombytes::(&bytes).unwrap(); asserteq!(msg.id, 42); assert_eq!(msg.data, "Hello, World!"); // Here, data is referenced. ```

• Example: Encoding data into a buffer of specified size.

``rust use databuf::{*, config::{num, len}}; /// Use big endian byte order + Encodemsglength withdatabuf::var_int::BEU15` const CONFIG: u8 = num::BE | len::BEU15;

[derive(Encode, Decode)]

struct Date { year: u16, month: u8, day: u8, }

[derive(Encode, Decode)]

struct Record { id: T, date: Date, msg: String, }

let record = Record { id: 42_u32, date: Date { year: 2018, month: 3, day: 7 }, msg: "Hello!".into() };

let mut buf = [0; 20]; let remaining = &mut buf.asmutslice(); record.encode::(remaining).unwrap();

let amt = 20 - remaining.len(); assert_eq!(amt, 15); // 15 bytes written to buf ```