store signed integers efficiently, as per protocol-buffers.

For unsigned integers use varint.

Integers are mapped to positive integers, so that positive integers become positive even numbers (n2) and negative integers become positive odd numbers. (n-2 - 1)

This is the same as moving the sign bit from the most significant possition to the least significant. Otherwise, varint will encode negative numbers as large integers.

var varint = require('varint')
var svarint = require('signed-varint')

console.log('unsigned', varint.encode(-1))
console.log('signed', svarint.encode(-1))

//=> unsigned [255,255,255, 15]
//   signed [1]

MIT