iczelia

iczelia / c-arbint

Public

fast+portable arbitrary precision integer library for c (wip)

15
1
100% credibility
Found Feb 12, 2026 at 12 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
C
AI Summary

c-arbint is a portable C library providing arbitrary-precision integer arithmetic with automatic performance optimizations across many platforms including WebAssembly.

How It Works

1
🔍 Discover Big Math Helper

You find a free tool that lets computers handle enormous numbers way beyond what calculators can do.

2
📥 Grab the Files

Download the simple files from the project's page to your computer.

3
🛠️ Build Your Math Engine

Follow easy steps like running a few commands to prepare the tool for your computer.

4
🔗 Link to Your Project

Add the tool to your own program so it can use super-sized numbers.

5
⚡ Perform Giant Calculations

Write straightforward code to add, multiply, or divide numbers as big as you need.

6
✅ Test and Tweak

Run your program and adjust as needed – it handles everything smoothly.

🎉 Conquer Huge Math

Your app now masters calculations with numbers too vast for ordinary tools!

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Star Growth

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AI-Generated Review

What is c-arbint?

c-arbint delivers fast, portable arbitrary precision integer arithmetic in pure C99, tackling big integer ops like addition, multiplication, division, and modular exponentiation without GMP dependencies. It provides signed multi-precision handling with explicit memory management, runtime CPU optimization, and a context for custom allocators—perfect for C apps needing high-precision math. Users get a straightforward API for core ops, bit manipulation, number theory (GCD, roots, primality), and even RNG seeding from platform entropy.

Why is it gaining traction?

Unlike heavyweight libs like GMP, c-arbint auto-detects CPU features (AVX2, BMI2) for speedup without rebuilds, stays portable across x86/ARM/RISC-V/s390x/ppc, and builds to WebAssembly side modules for browser/Node.js. Its zero-dependency bootstrap (autotools only) and explicit control over LTO/warnings make integration dead simple via pkg-config. Devs dig the balance of speed, portability, and no-nonsense explicit allocation.

Who should use this?

C devs in cryptography building RSA/EC ops, competitive programmers crunching factorials/binomials, or systems folks targeting embedded/WASM where bigints must run lean. Suited for math tools needing GCD/inverses/NTT on exotic arches like riscv64/s390x, without dragging in massive deps.

Verdict

Solid pick for fast+portable arbitrary precision integers in C if you're dodging GMP bloat, but at 11 stars and 1.0% credibility it's a WIP—run the CI tests and tune thresholds before committing. Early but battle-tested on diverse platforms.

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