How can I find a subsequence in a &[u8] slice?

Question

I have a &[u8] slice over a binary buffer. I need to parse it, but a lot of the methods that I would like to use (such as str::find) don\'t see

Answer 1

How about Regex on bytes? That looks very powerful. See this Rust playground demo.

extern crate regex;

use regex::bytes::Regex;

fn main() {
    //see https://doc.rust-lang.org/regex/regex/bytes/

    let re = Regex::new(r"say [^,]*").unwrap();

    let text = b"say foo, say bar, say baz";

    // Extract all of the strings without the null terminator from each match.
    // The unwrap is OK here since a match requires the `cstr` capture to match.
    let cstrs: Vec =
        re.captures_iter(text)
          .map(|c| c.get(0).unwrap().start())
          .collect();

    assert_eq!(cstrs, vec![0, 9, 18]);
}