Struct Varint 

pub struct Varint(/* private fields */);

A deserialized varint value.

This type represents the decoded 8-byte value from serialized bytes to protobuf integer types.

Implementations

impl Varint

pub fn new(bytes: [u8; 8]) -> Self

Create a new Varint from raw bytes.

The bytes given are, essentially, a little-endian encoded u64. Note that this is NOT the “protobuf encoded” varint bytes.

pub fn as_bytes(&self) -> &[u8; 8]

Get the underlying byte array, the little-endian encoded u64. Note that this is NOT the “protobuf encoded” varint bytes.

pub fn from_uint64(value: u64) -> Self

Create a Varint from u64, assuming UInt64 protobuf type.

pub fn from_uint32(value: u32) -> Self

Create a Varint from u32, assuming UInt32 protobuf type.

pub fn from_sint64(value: i64) -> Self

Create a Varint from i64, assuming SInt64 protobuf type.

pub fn from_sint32(value: i32) -> Self

Create a Varint from i32, assuming SInt32 protobuf type.

pub fn from_int64(value: i64) -> Self

Create a Varint from i64, assuming Int64 protobuf type.

pub fn from_int32(value: i32) -> Self

Create a Varint from i32, assuming Int32 protobuf type.

pub fn from_bool(value: bool) -> Self

Create a Varint from bool, assuming Bool protobuf type.

pub fn to_uint64(&self) -> u64

Convert to u64, assuming UInt64 protobuf type.

pub fn try_to_uint32(&self) -> Result<u32>

Convert to u32, assuming UInt32 protobuf type. Returns an error if the value is out of range for u32.

pub fn to_sint64(&self) -> i64

Convert to i64, assuming SInt64 protobuf type.

pub fn try_to_sint32(&self) -> Result<i32>

Convert to i32, assuming SInt32 protobuf type. Returns an error if the value is out of range for i32.

pub fn to_int64(&self) -> i64

Convert to i64, assuming Int64 protobuf type.

pub fn try_to_int32(&self) -> Result<i32>

Convert to i32, assuming Int32 protobuf type. Returns an error if the value is out of range for i32.

pub fn to_bool(&self) -> bool

Convert to bool, assuming Bool protobuf type.

pub fn varint_size(&self) -> usize

Get the size of this varint when encoded as a varint.

This method calculates the exact number of bytes needed to encode the underlying value as a protobuf varint.

pub fn encode(&self) -> ([u8; 10], usize)

Encode this varint as a varint and return the bytes with count.

Returns a tuple of (bytes, count) where:

• bytes: fixed-size array containing the encoded varint
• count: actual number of bytes used (1-MAX_VARINT_BYTES)

Example

use ::protobuf_core::Varint;

let varint = Varint::from_uint64(150);
let (bytes, count) = varint.encode();
assert_eq!(count, 2);
assert_eq!(&bytes[..count], &[0x96, 0x01]);

Trait Implementations

impl Clone for Varint

fn clone(&self) -> Varint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Varint

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

Formats the value using the given formatter.

impl From<Tag> for Varint

fn from(tag: Tag) -> Self

Converts to this type from the input type.

impl Hash for Varint

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 PartialEq for Varint

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<Varint> for Tag

type Error = ProtobufError

The type returned in the event of a conversion error.

fn try_from(encoded: Varint) -> Result<Self>

Performs the conversion.

impl Copy for Varint

impl Eq for Varint

impl StructuralPartialEq for Varint