Struct blocked_vec::BlockedVec

pub struct BlockedVec { /* private fields */ }

A vector of blocks.

See the module documentation for details.

Implementations

impl BlockedVec

pub fn new() -> Self

Creates a new BlockedVec.

Panics

Panics if the queried page size cannot be made into a layout.

pub fn new_paged(page_layout: Layout) -> Self

Creates a new BlockedVec with a given page layout.

pub fn with_len(len: usize) -> Self

Creates a new BlockedVec with an initial length, with the cursor placed at the front.

Panics

Panics if the queried page size cannot be made into a layout.

pub fn with_len_paged(len: usize, page_layout: Layout) -> Self

Creates a new BlockedVec with a given page layout and an initial length, with the cursor placed at the front.

pub fn len(&self) -> usize

Returns the length of this BlockedVec.

pub fn is_empty(&self) -> bool

Checks if this BlockedVec is empty.

pub fn extend(&mut self, additional: usize)

Extend the BlockedVec, with the possible additional areas filled with zero.

Panics

Panics if the seeker or blocks are inconsistent.

pub fn append_vectored(&mut self, buf: &mut [impl IoSlice<'_>]) -> usize

Append a bunch of buffers to the BlockedVec.

Returns

The actual length of the buffers appended.

Panics

Panics if the seeker is inconsistent.

pub fn append(&mut self, buf: &[u8]) -> usize

Append a buffer to the BlockedVec.

Returns

The actual length of the buffer appended.

pub fn read_vectored(&mut self, buf: &mut [impl IoSliceMut<'_>]) -> usize

Like read, except that it reads into a slice of buffers.

pub fn read_at_vectored(
    &mut self,
    pos: usize,
    buf: &mut [impl IoSliceMut<'_>]
) -> usize

Like read_at, except that it reads into a slice of buffers.

pub fn read(&mut self, buf: &mut [u8]) -> usize

Pull some bytes from this BlockedVec into the specified buffer, returning how many bytes were read.

pub fn read_at(&mut self, pos: usize, buf: &mut [u8]) -> usize

Pull some bytes from this BlockedVec into the specified buffer at a specified position, returning how many bytes were read.

pub fn write_vectored(&mut self, buf: &mut [impl IoSlice<'_>]) -> usize

Like write, except that it writes from a slice of buffers.

pub fn write_at_vectored(
    &mut self,
    pos: usize,
    buf: &mut [impl IoSlice<'_>]
) -> usize

Like write_at, except that it writes from a slice of buffers.

pub fn write(&mut self, buf: &[u8]) -> usize

Write a buffer into this writer, returning how many bytes were written.

pub fn write_at(&mut self, pos: usize, buf: &[u8]) -> usize

Write a buffer into this writer at a specified position, returning how many bytes were written.

pub fn seek(&mut self, pos: SeekFrom) -> Option<usize>

Seek to an offset, in bytes, in this BlockedVec.

pub fn truncate(&mut self, len: usize) -> bool

Shortens this BlockedVec to the specified length.

pub fn resize(&mut self, new_len: usize)

Resizes the BlockedVec in-place so that len is equal to new_len, with the possible additional area filled with zero.

Trait Implementations

impl Debug for BlockedVec

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

Formats the value using the given formatter.

impl Default for BlockedVec

fn default() -> Self

Returns the “default value” for a type.

impl Read for BlockedVec

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Read the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>where
    R: Read,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it.

impl Seek for BlockedVec

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream.

fn rewind(&mut self) -> Result<(), Error>

Rewind to the beginning of a stream.

fn stream_len(&mut self) -> Result<u64, Error>

🔬This is a nightly-only experimental API. (seek_stream_len)

Returns the length of this stream (in bytes).

fn stream_position(&mut self) -> Result<u64, Error>

Returns the current seek position from the start of the stream.

impl Write for BlockedVec

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

Like write, except that it writes from a slice of buffers.

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

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adapter for this instance of Write.