Struct Varint 

pub struct Varint<T>(pub T);

LEB128 varint wrapper. Signed integers use the zigzag mapping, matching protobuf’s sint32 / sint64.

Decoding is lenient about overlong encodings, like varint::decode_u64. Call the varint::decode_*_canonical functions directly when canonical form must be enforced.

Example

use wire_codec::{Decode, Encode, ReadBuf, Varint, WriteBuf};

let mut out = [0u8; 8];
let mut buf = WriteBuf::new(&mut out);
Varint(300_u32).encode(&mut buf).unwrap();
Varint(-1_i64).encode(&mut buf).unwrap();
assert_eq!(buf.written(), &[0xAC, 0x02, 0x01]);
assert_eq!(Varint(300_u32).encoded_size(), 2);

let mut r = ReadBuf::new(&out[..3]);
assert_eq!(Varint::<u32>::decode(&mut r).unwrap(), Varint(300));
assert_eq!(Varint::<i64>::decode(&mut r).unwrap(), Varint(-1));

Tuple Fields

0: T

Trait Implementations

impl<T: Clone> Clone for Varint<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Copy> Copy for Varint<T>

impl<T: Debug> Debug for Varint<T>

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

Formats the value using the given formatter.

impl<'de> Decode<'de> for Varint<u16>

fn decode(buf: &mut ReadBuf<'de>) -> Result<Self>

Read a value of Self from buf, advancing its read position.

impl<'de> Decode<'de> for Varint<u32>

fn decode(buf: &mut ReadBuf<'de>) -> Result<Self>

Read a value of Self from buf, advancing its read position.

impl<'de> Decode<'de> for Varint<u64>

fn decode(buf: &mut ReadBuf<'de>) -> Result<Self>

Read a value of Self from buf, advancing its read position.

impl<'de> Decode<'de> for Varint<usize>

fn decode(buf: &mut ReadBuf<'de>) -> Result<Self>

Read a value of Self from buf, advancing its read position.

impl<'de> Decode<'de> for Varint<i32>

fn decode(buf: &mut ReadBuf<'de>) -> Result<Self>

Read a value of Self from buf, advancing its read position.

impl<'de> Decode<'de> for Varint<i64>

fn decode(buf: &mut ReadBuf<'de>) -> Result<Self>

Read a value of Self from buf, advancing its read position.

impl<T: Default> Default for Varint<T>

fn default() -> Self

Returns the “default value” for a type.

impl Encode for Varint<u16>

fn encoded_size(&self) -> usize

Number of bytes Encode::encode will write on success.

fn encode(&self, buf: &mut WriteBuf<'_>) -> Result<()>

Write self into buf, advancing its write position.

impl Encode for Varint<u32>

fn encoded_size(&self) -> usize

Number of bytes Encode::encode will write on success.

fn encode(&self, buf: &mut WriteBuf<'_>) -> Result<()>

Write self into buf, advancing its write position.

impl Encode for Varint<u64>

fn encoded_size(&self) -> usize

Number of bytes Encode::encode will write on success.

fn encode(&self, buf: &mut WriteBuf<'_>) -> Result<()>

Write self into buf, advancing its write position.

impl Encode for Varint<usize>

fn encoded_size(&self) -> usize

Number of bytes Encode::encode will write on success.

fn encode(&self, buf: &mut WriteBuf<'_>) -> Result<()>

Write self into buf, advancing its write position.

impl Encode for Varint<i32>

fn encoded_size(&self) -> usize

Number of bytes Encode::encode will write on success.

fn encode(&self, buf: &mut WriteBuf<'_>) -> Result<()>

Write self into buf, advancing its write position.

impl Encode for Varint<i64>

fn encoded_size(&self) -> usize

Number of bytes Encode::encode will write on success.

fn encode(&self, buf: &mut WriteBuf<'_>) -> Result<()>

Write self into buf, advancing its write position.

impl<T: Eq> Eq for Varint<T>

impl<T: Hash> Hash for Varint<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Ord> Ord for Varint<T>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl<T: PartialEq> PartialEq for Varint<T>

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<T: PartialOrd> PartialOrd for Varint<T>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T: PartialEq> StructuralPartialEq for Varint<T>