Trait Encoder

Source

pub trait Encoder: Sized {
    // Required methods
    fn write_sized<F>(&mut self, len: usize, write: F)
       where F: FnOnce(&mut [u8]);
    fn write_slice(&mut self, slice: &[u8]);
    fn write_zerocopy<T, F>(&mut self, write: F)
       where T: IntoBytes + FromBytes + Unaligned,
             F: FnOnce(&mut T);
    fn write_repeated(&mut self, count: usize, value: u8);
    fn capacity(&self) -> usize;
    fn len(&self) -> usize;

    // Provided methods
    fn encode<T>(&mut self, value: &T)
       where T: EncoderValue { ... }
    fn encode_with_len_prefix<Len, T>(&mut self, value: &T)
       where Len: TryFrom<usize> + EncoderValue,
             T: EncoderValue,
             <Len as TryFrom<usize>>::Error: Debug { ... }
    fn is_empty(&self) -> bool { ... }
    fn remaining_capacity(&self) -> usize { ... }
}

Required Methods§

Source

fn write_sized<F>(&mut self, len: usize, write: F)
where F: FnOnce(&mut [u8]),

Calls write with a slice of len bytes at the current write position

Source

fn write_slice(&mut self, slice: &[u8])

Copies the slice into the buffer

Source

fn write_zerocopy<T, F>(&mut self, write: F)
where T: IntoBytes + FromBytes + Unaligned, F: FnOnce(&mut T),

Writes a zerocopy value to the buffer

Source

fn write_repeated(&mut self, count: usize, value: u8)

Repeatedly write a byte value for a given count

let mut buffer = vec![255; 1024];
let mut encoder = EncoderBuffer::new(&mut buffer);
encoder.encode(&1u8);
encoder.write_repeated(4, 0);
assert_eq!(&buffer[0..6], &[1, 0, 0, 0, 0, 255]);