Struct rust_unixfs::file::adder::FileAdder

pub struct FileAdder { /* private fields */ }

File tree builder. Implements core::default::Default which tracks the recent defaults.

Custom file tree builder can be created with FileAdder::builder() and configuring the chunker and collector.

Current implementation maintains an internal buffer for the block creation and uses a non-customizable hash function to produce Cid version 0 links. Currently does not support inline links.

Implementations

impl FileAdder

pub fn builder() -> FileAdderBuilder

Returns a FileAdderBuilder for creating a non-default FileAdder.

pub fn size_hint(&self) -> usize

Returns the likely amount of buffering the file adding will work with best.

When using the size based chunker and input larger than or equal to the hint is push()’ed to the chunker, the internal buffer will not be used.

pub fn push(
    &mut self,
    input: &[u8]
) -> (impl Iterator<Item = (Cid, Vec<u8>)>, usize)

Called to push new file bytes into the tree builder.

Returns the newly created blocks (at most 2) and their respective Cids, and the amount of input consumed.

pub fn finish(self) -> impl Iterator<Item = (Cid, Vec<u8>)>

Called after the last FileAdder::push to finish the tree construction.

Returns a list of Cids and their respective blocks.

Note: the API will hopefully evolve in a direction which will not allocate a new Vec for every block in the near-ish future.

Trait Implementations

impl Debug for FileAdder

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FileAdder

fn default() -> FileAdder

Returns the “default value” for a type.