https://github.com/calccrypto/uint128_t

C++ unsigned 128 bit integer type
https://github.com/calccrypto/uint128_t

c-plus-plus unsigned-integers

Last synced: 1 day ago
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C++ unsigned 128 bit integer type

• Host: GitHub
• URL: https://github.com/calccrypto/uint128_t
• Owner: calccrypto
• License: mit
• Created: 2014-01-29T21:21:35.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2023-06-24T15:05:14.000Z (over 1 year ago)
• Last Synced: 2024-12-26T00:08:12.591Z (8 days ago)
• Topics: c-plus-plus, unsigned-integers
• Language: C++
• Homepage:
• Size: 1.95 MB
• Stars: 219
• Watchers: 13
• Forks: 46
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# uint128_t

An unsigned 128 bit integer type for C++

Copyright (c) 2013 - 2018 Jason Lee @ calccrypto at gmail.com

Please see LICENSE file for license.

[![uint128_t](https://github.com/calccrypto/uint128_t/actions/workflows/uint128_t.yml/badge.svg)](https://github.com/calccrypto/uint128_t/actions/workflows/uint128_t.yml)

## Acknowledgements

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.

Thanks to John Skaller for making symbols visible

when compiling as a shared library. This was originally

done in `uint256_t`, which I copied into here.

## Usage

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++.

### In Code

All that needs to be done in code is `#include "uint128_t.h"`

```c++

#include 

#include "uint128_t.h"

int main() {

    uint128_t a = 1;

    uint128_t b = 2;

    std::cout << (a | b) << std::endl;

    return 0;

}

```

### Compilation

A C++ compiler supporting at least C++11 is required.

Compilation can be done by directly including `uint128_t.cpp` in your compile command, e.g. `g++ -std=c++11 main.cpp uint128_t.cpp`, or other ways, such as linking the `uint128_t.o` file, or creating a library, and linking the library in.