Method decode

crates/commitlog/src/commit.rs:46–48

Read [`Self::LEN`] bytes from `reader` and interpret them as the "header" of a [`Commit`]. Returns `None` if: - The reader cannot provide exactly [`Self::LEN`] bytes I.e. it is at EOF - Or, the read bytes are all zeroes This is to allow preallocation of segments.

(reader: R)

    ///   This is to allow preallocation of segments.
    ///
    pub fn decode<R: Read>(reader: R) -> io::Result<Option<Self>> {
        Self::decode_v1(reader)
    }

    fn decode_internal<R: Read>(reader: R, v: Version) -> io::Result<Option<Self>> {
        use Version::*;