Struct asuran::repository::backend::common::segment::SegmentHeaderPart

pub struct SegmentHeaderPart<T: Read + Write + Seek> { /* fields omitted */ }

A view over the header portion of a segment

Will cache the state of the header internally and flush the changes either when the flush method is called, or on drop.

It is strongly recommended to call the flush method before dropping this type. The Drop impl will attempt to call flush, but will ignore any errors that occur.

Implementations

impl<T: Read + Write + Seek> SegmentHeaderPart<T>

pub fn open(handle: T, key: Key, settings: ChunkSettings) -> Result<Self>

Attempts to open the header part of a Segment.

Errors:

Will error if decryption fails, the header file has a malformed chunk, or if some other IO error occurs.

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

Flushes the in-memory buffer to disk.

Will not do anything if no changes have been added.

Will additionally reset the changed flag.

Errors:

Will error if an I/O error occurs during writing.

pub fn get_header(&self, index: usize) -> Option<SegmentHeaderEntry>

Will return the chunk header information at the given index, if one exists

pub fn insert_header(&mut self, header: SegmentHeaderEntry) -> usize

Will insert the chunk header information and provide its index

Trait Implementations

impl<T: Read + Write + Seek> Drop for SegmentHeaderPart<T>

fn drop(&mut self)

Executes the destructor for this type.