Call C code from node.js

Question

Let's say i have source and header files for C code (bus-driver.c and bus-driver.h) can i call functions inside them from node.js

for example bus-driver.h

void bus_init(void);
void bus_write(char *buf);

I want to call these functions from node.js.

Answer 1

The nodeffi seems to be simplest way to do that. I didn't test it so it can has problems that I don't realize now.

But I would suggest to do something like that, following the tutorial. Install nodeffi:

Generate a library for your bus-driver if you don't have one, let's call it libbusdriver.

Then in your javascript do something similar to this:

var ffi = require('ffi');

var libbusdriver = ffi.Library('libbusdriver', {
  'bus_init': [ 'void', [ 'void' ] ],
  'bus_write': [ 'void', [ 'string' ] ],
});
libbusdriver.bus_init();
libbusdriver.bus_write("Hello");

Let me know if it helps.