Struct Writer 

pub struct Writer { /* private fields */ }

A growable little-endian output buffer.

Implementations

impl Writer

pub fn new() -> Self

An empty writer.

pub fn with_capacity(capacity: usize) -> Self

An empty writer with capacity bytes preallocated.

pub fn len(&self) -> usize

Bytes written so far.

pub fn is_empty(&self) -> bool

Whether nothing has been written.

pub fn as_slice(&self) -> &[u8]

The bytes written so far.

pub fn into_vec(self) -> Vec<u8>

Consume the writer, yielding its bytes.

pub fn u8(&mut self, v: u8)

Append one byte.

pub fn u16(&mut self, v: u16)

Append a u16.

pub fn u32(&mut self, v: u32)

Append a u32.

pub fn u64(&mut self, v: u64)

Append a u64.

pub fn bytes(&mut self, v: &[u8])

Append raw bytes.

pub fn varint(&mut self, v: u64)

Append a varint.

pub fn pad_to(&mut self, align: usize)

Pad with zero bytes until the length is a multiple of align.

pub fn patch_u32(&mut self, at: usize, v: u32)

Overwrite the u32 at at.

Used for back-patching offsets once a layout is known.

pub fn patch_u64(&mut self, at: usize, v: u64)

Overwrite the u64 at at.

pub fn patch_bytes(&mut self, at: usize, v: &[u8])

Overwrite the bytes at at with v.

Trait Implementations

impl Clone for Writer

fn clone(&self) -> Writer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Writer

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

Formats the value using the given formatter.

impl Default for Writer

fn default() -> Writer

Returns the “default value” for a type.