Struct Leb128Writer 

pub struct Leb128Writer<W> { /* private fields */ }

Writer wrapper for canonical LEB128 integers.

Target-width integers

usize and isize methods use the current Rust target’s pointer width. Prefer fixed-width integer methods such as write_u64 or write_i64 for persistent files and cross-platform protocols.

Implementations

impl<W> Leb128Writer<W>

pub const fn new(inner: W) -> Self

Creates a LEB128 writer.

pub const fn get_ref(&self) -> &W

Returns a shared reference to the underlying writer.

pub fn get_mut(&mut self) -> &mut W

Returns an exclusive reference to the underlying writer.

pub fn into_inner(self) -> W

Consumes this wrapper and returns the underlying writer.

impl<W> Leb128Writer<W>

where W: Write,

pub fn write_u8(&mut self, value: u8) -> Result<()>

Writes an unsigned LEB128 u8.

pub fn write_u16(&mut self, value: u16) -> Result<()>

Writes an unsigned LEB128 u16.

pub fn write_u32(&mut self, value: u32) -> Result<()>

Writes an unsigned LEB128 u32.

pub fn write_u64(&mut self, value: u64) -> Result<()>

Writes an unsigned LEB128 u64.

pub fn write_u128(&mut self, value: u128) -> Result<()>

Writes an unsigned LEB128 u128.

pub fn write_usize(&mut self, value: usize) -> Result<()>

Writes an unsigned LEB128 usize.

pub fn write_i8(&mut self, value: i8) -> Result<()>

Writes a signed LEB128 i8.

pub fn write_i16(&mut self, value: i16) -> Result<()>

Writes a signed LEB128 i16.

pub fn write_i32(&mut self, value: i32) -> Result<()>

Writes a signed LEB128 i32.

pub fn write_i64(&mut self, value: i64) -> Result<()>

Writes a signed LEB128 i64.

pub fn write_i128(&mut self, value: i128) -> Result<()>

Writes a signed LEB128 i128.

pub fn write_isize(&mut self, value: isize) -> Result<()>

Writes a signed LEB128 isize.

pub fn write_utf8_string(&mut self, value: &str) -> Result<()>

Writes a UTF-8 string prefixed by an unsigned LEB128 byte length.

The length prefix is encoded as usize, so this format is target-width dependent. Prefer a fixed-width length prefix for persistent files and cross-platform protocols.

Parameters

• value: String slice to write.

Errors

Returns an I/O error from the underlying writer.

Trait Implementations

impl<W> Seek for Leb128Writer<W>

where W: Seek,

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

Seeks the wrapped writer.

Parameters

• position: Target seek position.

Returns

Returns the new stream position.

Errors

Returns the seek error reported by the wrapped writer.

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.

fn seek_relative(&mut self, offset: i64) -> Result<(), Error>

Seeks relative to the current position.

impl<W> Write for Leb128Writer<W>

where W: Write,

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

Writes bytes to the wrapped writer.

Parameters

• buffer: Source bytes to write.

Returns

Returns the number of bytes written.

Errors

Returns the I/O error reported by the wrapped writer.

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

Flushes the wrapped writer.

Errors

Returns the I/O error reported by the wrapped writer.

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

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

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, args: Arguments<'_>) -> Result<(), Error>

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

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

where Self: Sized,

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