integer-encoding 1.1.7

varint+zigzag and fixedint integer encoding/decoding (

integer-encoding-rs Build Status

full documentation

This crate provides encoding and decoding of integers to and from bytestring representations.

The format is described here: Google's protobuf integer encoding technique.


FixedInt casts integers to bytes by either copying the underlying memory or performing a transmutation. The encoded values use machine endianness (little-endian on x86).


VarInt encodes integers in blocks of 7 bits; the MSB is set for every byte but the last, in which it is cleared.

Signed values are first converted to an unsigned representation using zigzag encoding (also described on the page linked above), and then encoded as every other unsigned number.