khkred / ffi_factorial

A Dart FFI App to get factorial from C Code.

Dart FFI for Writing C Code

Welcome to the Dart FFI project! This repository contains code and examples demonstrating how to use Dart FFI (Foreign Function Interface) to call C code from Dart.

Overview

In this project, you'll learn how to:

• Set up your environment for using Dart FFI.
• Write and compile C code.
• Integrate and call C functions from your Dart application.

Getting Started

Prerequisites

Before you begin, ensure you have the following installed on your machine:

• Dart SDK
• C compiler (such as GCC for Linux/macOS or MinGW for Windows)

Setup

1. Clone the repository:

   git clone https://github.com/khkred/ffi_factorial.git
   cd ffi_factorial

2. Compile the C code:

   Compile the C code into a shared library. The commands may vary depending on your operating system:

   • Linux/macOS:

     gcc -shared -o libfactorial.so factorial.c

   • Windows:

     gcc -shared -o libfactorial.dll factorial.c

3. Run the Dart application:

   dart run

Usage

The Dart application will prompt you to enter a number to calculate its factorial using the native C function. Simply follow the on-screen instructions.

Code Structure insde bin

• factorial.c: Contains the C code for calculating the factorial.
• libfactorial.so/libfactorial.dll/libfactorial.dylib: The compiled shared library.
• ffi_factorial.dart: The Dart code that uses FFI to call the C function.
• factorial_user_input.dart: The Dart code that asks for an user input in order to calcualte the factorial

Contributing

Contributions are welcome! If you have any suggestions or improvements, please feel free to submit a pull request or open an issue.

License

This project is licensed under the MIT License. See the LICENSE file for more details.

Acknowledgements

Special thanks to the Dart and Flutter communities for their continuous support and inspiration.

Author

• Harish

Links

• How to Use Dart FFI for Writing C Code