Struct CompressionInfo 

pub struct CompressionInfo { /* private fields */ }

Implementations

impl CompressionInfo

pub fn new( chunk_size: u64, compressed_size: u64, offsets: &[u64], compression_algorithm: CompressionAlgorithm, ) -> Result<Self, ChunkedArchiveError>

pub fn chunk_size(&self) -> u64

Returns the chunk size for this compressed blob.

pub fn compressed_size(&self) -> u64

Returns the total compressed size of this blob.

pub fn compressed_range_for_uncompressed_range( &self, range: &Range<u64>, ) -> Result<Range<u64>, ChunkedArchiveError>

Returns the compressed range for the specified uncompressed range.

pub fn decompress( &self, src: &[u8], dst: &mut [u8], dst_start_offset: u64, ) -> Result<(), ChunkedArchiveError>

Decompress the bytes of src into dst.

• src is allowed to span multiple chunks.
• dst must have the exact size of the uncompressed bytes.
• dst_start_offset is the location of the uncompressed bytes within the blob and must be chunk aligned. This is necessary for determining the chunk boundaries in src.

pub fn streaming_decompressor<'a, B: DataBuffer>( &'a self, range: Range<u64>, uncompressed_size: u64, dest_buf: B, ) -> Result<(StreamingDecompressor<'a, B>, Range<u64>), ChunkedArchiveError>

Returns a streaming decompressor and the block-aligned compressed range (Range<u64>) that must be read from storage to decode range into dest_buf.

range.start must be chunk aligned (a multiple of chunk_size).

Trait Implementations

impl Clone for CompressionInfo

fn clone(&self) -> CompressionInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.