use std::io::Read;

use algorithms::crc::Crc;

fn main() {
    let args: Vec<String> = std::env::args().collect();
    let use_ffi = args.contains(&"-c".to_string());
    let mut input = Vec::new();
    std::io::stdin()
        .read_to_end(&mut input)
        .expect("could not read from stdin");
    let crc = if use_ffi {
        algorithms::crc::ffi::Crc32::checksum(&input)
    } else {
        algorithms::crc::Crc32::checksum(&input)
    };
    println!("{crc:08x}");
}