3 releases (stable)
1.0.1 | Feb 28, 2024 |
---|---|
1.0.0 | Feb 26, 2024 |
0.1.0 | Feb 20, 2024 |
#495 in Encoding
30 downloads per month
55KB
1.5K
SLoC
rust-fr
'rust-fr' (aka rust for real
) is a simple, non-self-describing data-interchange format.
installation
You can use either of these methods.
- Add via
cargo add rust-fr
- Add via
Cargo.toml
[dependencies]
rust-fr = "1"
usage.
use serde::{Serialize, Deserialize};
use rust_fr::{serializer, deserializer};
// define some data
#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
struct Human {
name: String,
age: u8
};
let human = Human {
name: "Ayush".to_string(),
age: 19
};
// serialize the data to bytes (Vec<u8>)
let human_bytes = serializer::to_bytes(&human).unwrap();
// deserialize the data from serialized bytes.
let deserialized_human = deserializer::from_bytes::<Human>(&human_bytes).unwrap();
assert_eq!(human, deserialized_human);
benchmark.
- Run
cargo test -- --nocapture --ignored
to run the benchmark tests.
running 3 tests
---- Small Data ----
rust_fr: 218 bytes
serde_json: 332 bytes
rmp_serde: 146 bytes
ciborium: 170 bytes
test tests::length_test_small_data ... ok
---- Medium Data ----
rust_fr: 14264 bytes
serde_json: 30125 bytes
rmp_serde: 10731 bytes
ciborium: 18347 bytes
test tests::length_test_medium_data ... ok
---- Large Data ----
rust_fr: 139214 bytes
serde_json: 367595 bytes
rmp_serde: 157219 bytes
ciborium: 198277 bytes
test tests::length_test_large_data ... ok
test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 4 filtered out; finished in 0.01s
why?
The goal was to learn/understand. I wrote this so I can learn how serde internally works and how to encode data into bytes that can ultimately be transferred over the wire or elsewhere.
format specification.
- The format is non-self-describing.
- Primitive types are serialized as is.
- bool: 0 -> false, 1 -> true (1 bit)
- i8, i16, i32, i64: as is.
- u8, u16, u32, u64: as is.
- f32, f64: as is.
- char: as u32 (4 bytes)
- Delimiters are used to separate different types of data.
- String, Byte and Map Delimiters are 1 byte long while all other delimiters are 3 bits long.
- Delimiters:
- String = 134; 0b10000110
- Byte = 135; 0b10000111
- Unit = 2; 0b010
- Seq = 3; 0b011
- SeqValue = 4; 0b100
- Map = 139; 0b10001011
- MapKey = 6; 0b110
- MapValue = 7; 0b111
- String, Bytes, Unit, Option are serialized as:
- str: bytes + STRING_DELIMITER
- bytes: bytes + BYTE_DELIMITER
- unit: UNIT (null)
- option: None -> unit(), Some -> self
- Structs are serialized as:
- unit_struct: unit()
- newtype_struct: self
- tuple_struct: seq()
- Enums are serialized as:
- unit_variant: variant_index
- newtype_variant: variant_index + self
- tuple_variant: variant_index + tuple()
- struct_variant: variant_index + struct()
- seq(): Sequences are serialized as:
- SEQ_DELIMITER + value_1 + SEQ_VALUE_DELIMITER + value_2 + SEQ_VALUE_DELIMITER + ... + SEQ_DELIMITER
- map(): Maps are serialized as:
- key_1 + MAP_KEY_DELIMITER + value_1 + MAP_VALUE_DELIMITER + key_2 + MAP_KEY_DELIMITER + value_2 + MAP_VALUE_DELIMITER + ... + MAP_DELIMITER
- Tuples and Structs are serialized as:
- tuple: seq()
- struct: map()
license.
It's MIT so you can do whatever you want. You can still read it here.
Dependencies
~1.3–1.9MB
~45K SLoC