[C++] 用C++扩展node.js(node-ffi版)

• https://nodejs.org/
  
• https://www.python.org
  

mkdir demo
cd  demo
npm init

{
  "name": "demo",
  "version": "1.0.0",
  "description": "a demo for node call native functions",
  "main": "demo.js",
  "scripts": {
  "test": "echo "Error: no test specified" && exit 1"
  },
  "keywords": [
  "node"
  ],
  "author": "Li XianJing",
  "license": "ISC"
}

sudo npm install -g node-gyp
npm install ffi bindings --save

double Add(double a, double b) {
  return a+b;
}

all:
  $(CC) -g -shared  demo.c -o libdemo.dylib
clean:
  rm -frv libdemo*

var ffi = require('ffi');
var demo = ffi.Library('./native/libdemo', {
  'Add': [ 'double', [ 'double', 'double'] ]
});
console.log(demo.Add(12345, 54321));

make -C native

node demo.js

• node-ffi