Trait integer_encoding::VarInt[][src]

pub trait VarInt: Sized + Copy {
    fn required_space(self) -> usize;
fn decode_var(src: &[u8]) -> (Self, usize);
fn encode_var(self, src: &mut [u8]) -> usize; fn encode_var_vec(self) -> Vec<u8> { ... } }

Varint (variable length integer) encoding, as described in https://developers.google.com/protocol-buffers/docs/encoding. Uses zigzag encoding (also described there) for signed integer representation.

Required methods

fn required_space(self) -> usize[src]

Returns the number of bytes this number needs in its encoded form. Note: This varies depending on the actual number you want to encode.

fn decode_var(src: &[u8]) -> (Self, usize)[src]

Decode a value from the slice. Returns the value and the number of bytes read from the slice (can be used to read several consecutive values from a big slice)

fn encode_var(self, src: &mut [u8]) -> usize[src]

Encode a value into the slice. The slice must be at least required_space() bytes long. The number of bytes taken by the encoded integer is returned.

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Provided methods

fn encode_var_vec(self) -> Vec<u8>[src]

Helper: Encode a value and return the encoded form as Vec. The Vec must be at least required_space() bytes long.

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Implementations on Foreign Types

impl VarInt for usize[src]

impl VarInt for u32[src]

impl VarInt for u16[src]

impl VarInt for u8[src]

impl VarInt for isize[src]

impl VarInt for i32[src]

impl VarInt for i16[src]

impl VarInt for i8[src]

impl VarInt for u64[src]

impl VarInt for i64[src]

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Implementors

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