https://github.com/albin-johansson/safely

A C++ library that provides safe numeric APIs.
https://github.com/albin-johansson/safely

arithmetic cpp cpp17 library safety undefined-behavior

Last synced: 9 months ago
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A C++ library that provides safe numeric APIs.

• Host: GitHub
• URL: https://github.com/albin-johansson/safely
• Owner: albin-johansson
• License: mit
• Created: 2025-08-05T23:20:03.000Z (11 months ago)
• Default Branch: main
• Last Pushed: 2025-09-21T13:32:51.000Z (9 months ago)
• Last Synced: 2025-09-21T15:16:05.523Z (9 months ago)
• Topics: arithmetic, cpp, cpp17, library, safety, undefined-behavior
• Language: C++
• Homepage:
• Size: 123 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Safely

[![CI](https://github.com/albin-johansson/safely/actions/workflows/ci.yml/badge.svg)](https://github.com/albin-johansson/safely/actions/workflows/ci.yml)

Safely is a C++ library that provides safe numeric APIs, free of undefined behavior.

## Requirements

* C++17 or later

* Signed integers must use two's complement (verified at compile-time)

## Configuration

* Use `SAFELY_ENABLE_INTRINSICS` to control whether intrinsics such as `__builtin_add_overflow` are used

## See also

* SEI CERT C Coding Standard

* [Clang intrinsics](https://clang.llvm.org/docs/LanguageExtensions.html#checked-arithmetic-builtins)

* [GCC intrinsics](https://gcc.gnu.org/onlinedocs/gcc/Integer-Overflow-Builtins.html)

* [MSVC intrinsics](https://learn.microsoft.com/en-us/cpp/intrinsics/compiler-intrinsics)

* [boostorg/safe_numerics](https://github.com/boostorg/safe_numerics)