示例

// to allow the use of the `VarintWriter::write_*_varint` functions
use varint_rs::VarintWriter;
// to allow the use of the `VarintReader::read_*_varint` functions
use varint_rs::VarintReader;

// an example to use for the buffer
use std::io::Cursor;

// create an i32 set to `300`
let number: i32 = 300;
// create a buffer for the varint to be writen to
// an i32 can be `4` bytes maximum, so we pre-allocate the capacity
let mut buffer: Cursor<Vec<u8>> = Cursor::new(Vec::with_capacity(4));

// now we can write the varint into the buffer
// `300` should only use `2` bytes instead of all `4`
// the `write_*_varint` functions may return an `std::io::Error`
buffer.write_i32_varint(number).unwrap();

// we reset the cursor pos back to `0`, this isn't varint stuff
buffer.set_position(0);

// now we can read the varint from the buffer
// we should read `300` which was the number we stored
// the `read_*_varint` functions may return an `std::io::Error`
let number: i32 = buffer.read_i32_varint().unwrap();

注意：此示例假设正在使用默认功能。

致谢

此代码的大部分内容是从varint crate由Cruz Bishop移植的。向他们表示衷心的感谢，因为他们提供了出色的算法！