11 releases
0.3.1 | Aug 14, 2024 |
---|---|
0.3.0 | Aug 14, 2024 |
0.2.1 | Aug 9, 2024 |
0.1.6 | Jul 21, 2024 |
0.1.5 | May 17, 2024 |
#117 in WebAssembly
Used in open-vector-tile
46KB
1K
SLoC
pbf-rs
The pbf
Rust crate provides functionalities to read and write Protocol Buffers (protobuf) messages. This crate is a 0 dependency package that uses no_std
and is intended to be used in embedded systems and WASM applications. The crate is designed to be small and efficient, with the cost of some features and flexibility. It is up to the user to create the necessary data structures and implement the ProtoRead
and ProtoWrite
traits in order to use it effectively.
Usage
Add the following to your Cargo.toml
:
[dependencies]
pbf = "0.1"
Examples
use pbf::{ProtoRead, ProtoWrite, Protobuf, Field, Type};
#[derive(Default)]
struct TestMessage {
a: i32,
b: String,
}
impl TestMessage {
fn new(a: i32, b: &str) -> Self {
TestMessage { a, b: b.to_owned() }
}
}
impl ProtoWrite for TestMessage {
fn write(&self, pb: &mut Protobuf) {
pb.write_varint_field::<u64>(1, self.a as u64);
pb.write_string_field(2, &self.b);
}
}
impl ProtoRead for TestMessage {
fn read(&mut self, tag: u64, pb: &mut Protobuf) {
println!("tag: {}", tag);
match tag {
1 => self.a = pb.read_varint::<i32>(),
2 => self.b = pb.read_string(),
_ => panic!("Invalid tag"),
}
}
}
let mut pb = Protobuf::new();
let msg = TestMessage::new(1, "hello");
pb.write_message(1, &msg);
let bytes = pb.take();
let mut pb = Protobuf::from_input(RefCell::new(bytes));
// first read in the field for the message
let field = pb.read_field();
assert_eq!(
field,
Field {
tag: 1,
r#type: Type::Bytes
}
);
let mut msg = TestMessage::default();
pb.read_message(&mut msg);
assert_eq!(msg.a, 1);
assert_eq!(msg.b, "hello");
Development
Requirements
You need the tool tarpaulin
to generate the coverage report. Install it using the following command:
cargo install cargo-tarpaulin
The bacon coverage
tool is used to generate the coverage report. To utilize the pycobertura package for a prettier coverage report, install it using the following command:
pip install pycobertura
Running Tests
To run the tests, use the following command:
cargo test
# bacon
bacon test
Generating Coverage Report
To generate the coverage report, use the following command:
cargo tarpaulin
# bacon
bacon coverage # or type `l` inside the tool