Trait pw_stream::ReadVarint

source ·

pub trait ReadVarint {
    // Required methods
    fn read_varint(&mut self) -> Result<u64>;
    fn read_signed_varint(&mut self) -> Result<i64>;
}

Expand description

A trait for reading varint integers from a stream.

The API here is explicitly limited to u64 and i64 in order to reduce code size.

§Example

use pw_stream::{Cursor, ReadVarint};

let mut cursor = Cursor::new(vec![0xfe, 0xff, 0xff, 0xff, 0x0f, 0xff, 0xff, 0xff, 0xff, 0x0f]);
let unsigned_value = cursor.read_varint().unwrap();
let signed_value = cursor.read_signed_varint().unwrap();
assert_eq!(unsigned_value, 0xffff_fffe);
assert_eq!(signed_value, i32::MIN.into());

Required Methods§

source

fn read_varint(&mut self) -> Result<u64>

Read an unsigned varint from the stream.

Errors that may be returned are dependant on the underlying implementation.

source

fn read_signed_varint(&mut self) -> Result<i64>

Read a signed varint from the stream.