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]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for u32`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for u16`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for u8`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for isize`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for i32`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for i16`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for i8`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for u64`[src]

`fn required_space(self) -> usize`[src]

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

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

`impl VarInt for i64`[src]

`fn required_space(self) -> usize`[src]

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

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

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Implementors

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