INNER CODE UNIT · Rust

trim_to_cap

TheMaxMur/RS-Key · crates/rsk-devconf/src/lib.rs:319

fn trim_to_cap(merged: &mut [u8], mut m: usize, keep: usize) -> usize {
    while m > EF_DEV_CONF_MAX && m > keep {
        let stored = m - keep;
        let mut i = 0;
        let victim = loop {
            if i + 2 > stored {
                break None;
            }
            let entry = 2 + merged[i + 1] as usize;
            if i + entry > stored {
                break None;
            }
            if merged[i] != TAG_USB_ENABLED {
                break Some((i, entry));
            }
            i += entry;
        };
        // Only the policy (or a half entry) left to give: refusing the write beats

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