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uint128_t

An unsigned 128 bit integer type for C++

Copyright (c) 2013 - 2017 Jason Lee @ calccrypto at gmail.com

Please see LICENSE file for license.

With much help from Auston Sterling

Thanks to Stefan Deigmüller for finding a bug in operator*.

Thanks to François Dessenne for convincing me to do a general rewrite of this class.

This is simple implementation of an unsigned 128 bit integer type in C++. It's meant to be used like a standard uintX_t, except with a larger bit size than those provided by C/C++.

Be careful when initializing a uint128_t value. -1 does not create the value 2¹²⁸ - 1. Rather, it uses 2⁶⁴ - 1, or whatever the built-in max unsigned value is.