用C++编写扩展node.js(node-ffi版)

mkdir demo
cd demo
npm init

{
 \"name\": \"demo\",
 \"version\": \"1.0.0\",
 \"de ion\": \"a demo for node call native functions\",
 \"main\": \"demo.js\",
 \" s\": {
  \"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