Function copy_content_from_change

atomic-repository/src/changestore/mod.rs:136–164

(
    hash: &Hash,
    change: &Change,
    start: usize,
    end: usize,
    buf: &mut [u8],
)

}

fn copy_content_from_change(
    hash: &Hash,
    change: &Change,
    start: usize,
    end: usize,
    buf: &mut [u8],
) -> ChangeStoreResult<usize> {
    if end > change.contents.len() {
        return Err(ChangeStoreError::ContentOutOfBounds {
            hash: hash.to_base32(),
            requested_start: start,
            requested_end: end,
            content_len: change.contents.len(),
        });
    }

    let len = end - start;
    if buf.len() < len {
        return Err(ChangeStoreError::ContentOutOfBounds {
            hash: hash.to_base32(),
            requested_start: start,
            requested_end: end,
            content_len: buf.len(),
        });
    }

    buf[..len].copy_from_slice(&change.contents[start..end]);
    Ok(len)
}

impl ChangeStore {
    /// Create a new change store with the given directory and cache capacity.