varinteger

Rust module for encoding/decoding varints that doesn't do any IO. Inspired by the Node.js varint module. I mostly wrote this to learn more about Rust.

Usage

extern crate varinteger;

let mut buf = [0; 512];

// encode 1000 as a varint into buf. returns how many bytes it wrote
let bytes_encoded = varinteger::encode(1000, buf);

let mut value = 0 as u64;
let bytes_decoded = varinteger::decode(buf, &mut value);

println!("encoded and decoded {}", value);

API

encode(value: u64, buf: &mut [u8]) -> usize

Encode a u64 integer to the buffer. Returns how many bytes were encoded.

encode_with_offset(value: u64, buf: &mut [u8], offset: usize) -> usize

Encode a u64 integer at a specific offset in the buffer. Returns how many bytes were encoded.

length(value: u64) -> usize

Returns how many bytes are needed to encode value.

signed_encode(value: i64, buf: &mut [u8]) -> usize

Encode a i64 (signed) integer to the buffer. Returns how many bytes were encoded.

signed_encode_with_offset(value: i64, buf: &mut [u8], offset: usize) -> usize

Encode a i64 (signed) integer at a specific offset in the buffer. Returns how many bytes were encoded.

signed_length(value: i64) -> usize

Returns how many bytes are needed to encode value.

License

MIT