FFI/FFIGEN HOW TO USE EXAMPLE

This repository is an example of how to integrate a C project into your Dart/Flutter project using ffi and ffigen Dart packages.

In this case, a C project has been created with a library containing a function that multiplies two numbers. This library is used in a Dart project (it would also work for Flutter) to display the result of the multiplication in the console.

Index

• Getting started
• Project structure

Getting started

• Install taskfile to automate processes. If you don't want to use it, you can run the commands in the Taskfile.yaml file manually.
• Install ffigen dependencies.
• Install project dependencies with dart pub get.
• You should have everything you need to compile and run a C project. If not, install the necessary dependencies (Cmake, gcc, etc).
• Run task generate to generate all dependencies and bindings needed. This includes:
  • dart pub get: Install dart dependencies
  • task build: Generate C shared library, dependencies and executable
  • task ffigen: Generate dart code with ffigen from C lang
• Run task execute or task run (generate + execute) to run the example.

💡 All task commands have to be run from the root folder of the project.

Project structure

├── /bin # Dart code interacting with native code
├── /lib # Bindings generated for native code
├── /native_code # C code
│  ├── /build # Build files, executables, shared library, etc (this folder is generated automatically if you use taskfile).
│  ├── /multiply # Example of a library
│  ├── main.c # Example of library use
│  ├── CMakeLists.txt # To build the native code
├── pubspec.yaml # Dart dependencies
├── taskfile.yml # File with different tasks to automate processes
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