[−][src]Trait integer_encoding::VarInt

pub trait VarInt: Sized + Copy {
    fn required_space(self) -> usize;
    fn decode_var(src: &[u8]) -> Option<(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`

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]) -> Option<(Self, usize)>`

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) return None if all bytes has MSB set.

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

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.

Loading content...

Provided methods

`fn encode_var_vec(self) -> Vec<u8>`

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

Loading content...

Implementations on Foreign Types

`impl VarInt for usize`[src]

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

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

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

Loading content...

Implementors

Loading content...