vartyint

Rust库，用于读取varint

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lib.rs:

读写varint到/从字节

写入字节

use vartyint;
let mut my_bytes = Vec::new();
vartyint::write_i32(1000, &mut my_bytes);
assert_eq!(my_bytes, &[0xd0, 0x0f]);

读取

从一个字节数组切片中读取一个整数（&[u8]）。成功时，返回数字以及剩余的字节。您可以这样“弹出”数字。

use vartyint;
let my_bytes = vec![0x18, 0x01, 0xBF, 0xBB, 0x01];

let (num1, my_bytes) = vartyint::read_i32(&my_bytes).unwrap();
assert_eq!(num1, 12);
assert_eq!(my_bytes, &[0x01, 0xBF, 0xBB, 0x01]);

let (num2, my_bytes) = vartyint::read_i32(&my_bytes).unwrap();
assert_eq!(num2, -1);
assert_eq!(my_bytes, &[0xBF, 0xBB, 0x01]);

let (num3, my_bytes) = vartyint::read_i32(&my_bytes).unwrap();
assert_eq!(num3, -12_000);
assert_eq!(my_bytes, &[]);

// Can't read any more
assert_eq!(vartyint::read_i32(&my_bytes), Err(vartyint::VartyIntError::EmptyBuffer));