sfparse-rs

sfparse-rs is RFC 9651 Structured Field Values parser written in Rust. It is the port of sfparse written in C.

It is designed not to do any extra allocation, like allocating maps, lists, and Strings, and do the minimal stuff to parse the input data.

use sfparse::{Parser, Value};

let mut urgency :i32 = 3;
let mut incremental = false;
let mut p = Parser::new("u=2, i".as_bytes());

loop {
    match p.parse_dict().unwrap() {
        None => break,
        Some(("u", Value::Integer(v))) if (0i64..=7i64).contains(&v) => urgency = v as i32,
        Some(("i", Value::Bool(v))) => incremental = v,
        _ => (),
    }
}

println!("urgency={urgency} incremental={incremental}");

License

The MIT License

Copyright (c) 2024 sfparse-rs contributors

lib.rs:

RFC 9651 Structured Field Values parser.

Provides Structured Field Values parser that is designed not to do any extra allocation, like allocating maps, lists, and Strings, and do the minimal stuff to parse the input data.

This is an example of parsing RFC 9218 Priority header field:

use sfparse::{Parser, Value};

let mut urgency :i32 = 3;
let mut incremental = false;
let mut p = Parser::new("u=2, i".as_bytes());

loop {
    match p.parse_dict().unwrap() {
        None => break,
        Some(("u", Value::Integer(v))) if (0i64..=7i64).contains(&v) => urgency = v as i32,
        Some(("i", Value::Bool(v))) => incremental = v,
        _ => (),
    }
}

println!("urgency={urgency} incremental={incremental}");