Struct ChunkIndex 

pub struct ChunkIndex { /* private fields */ }

Chunk hashes for the files under one root.

Implementations

impl ChunkIndex

pub fn load(root: &Path) -> Self

Load the index for root, or start empty if there is none to load.

A corrupt or truncated index is treated as absent: the cost is re- hashing, and trusting damaged hashes would be the one outcome worth avoiding.

pub fn get( &self, rel: &str, size: u64, mtime: i64, chunk_size: u32, ) -> Option<&[[u8; 32]]>

Hashes for a file, if the cache still describes it.

pub fn insert( &mut self, rel: &str, size: u64, mtime: i64, chunk_size: u32, hashes: Vec<[u8; 32]>, )

pub fn retain(&mut self, keep: &HashSet<String>)

Forget everything not named in keep, so a long-lived index does not accumulate entries for files that were deleted years ago.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn save(&mut self) -> Result<()>

Write the index out, if anything changed.

Through a temporary file and a rename, so an interrupted save leaves the previous index rather than a half-written one.

Trait Implementations

impl Default for ChunkIndex

fn default() -> Self

Returns the “default value” for a type.