Boxcars

Boxcars is a Rocket League replay parser written in Rust with serde support for serialization oftentimes into JSON. The focus is correctness and performance with boxcar users able to dictate what sections of the replay to parse. For instance, parsing just the header (where tidbits like goals and scores are stored) completes in under 50 microseconds. However, if you want to check against replay corruption and parse the network data, it would cost you 30 milliseconds (~1000x increase). While a 1000x increase in time sounds significant; keep in mind, 30ms is phenomenal compared to current state of the art Rocket League Replay parsers.

extern crate boxcars;
extern crate serde_json;
extern crate failure;

use std::fs::File;
use std::io::{self, Read};
# fn main() {
#    let filename = "assets/rumble.replay";
#    run(filename).unwrap();
# }

fn run(filename: &str) -> Result<(), ::failure::Error> {
    let mut f = File::open(filename)?;
    let mut buffer = vec![];
    f.read_to_end(&mut buffer)?;
    let replay = boxcars::ParserBuilder::new(&buffer)
        .on_error_check_crc()
        .parse()?;

    serde_json::to_writer(&mut io::stdout(), &replay)?;
    Ok(())
}