Function parse_segment_filename

nodedb-wal/src/segment/meta.rs:64–68

Parse the first_lsn from a segment filename. Returns `None` if the filename doesn't match the expected pattern.

(filename: &str)

///
/// Returns `None` if the filename doesn't match the expected pattern.
pub(crate) fn parse_segment_filename(filename: &str) -> Option<u64> {
    let stem = filename.strip_prefix(SEGMENT_PREFIX)?;
    let lsn_str = stem.strip_suffix(&format!(".{SEGMENT_EXTENSION}"))?;
    lsn_str.parse::<u64>().ok()
}

#[cfg(test)]
mod tests {