#include <stdio.h>
#include <Python.h>

static PyObject *
demo_say_hello(PyObject *self, PyObject *args) {
	printf("Hello!\n");
	return Py_None;
}

static PyObject *
demo_return_42(PyObject *self, PyObject *args) {
	return Py_BuildValue("i", 42);
}

static PyObject *
demo_add(PyObject *self, PyObject *args) {
	int a, b;

	if (!PyArg_ParseTuple(args, "ii", &a, &b)) {
		return NULL;
	}

	return Py_BuildValue("i", a + b);
}


static PyMethodDef demoMethods[] = {
	{"say_hello", demo_say_hello, METH_VARARGS, "Print a message."},
	{"return_42", demo_return_42, METH_VARARGS, "Return 42."},
	{"add", demo_add, METH_VARARGS, "Return the addition of arguments."},
	{NULL, NULL, 0, NULL} /* Last element: Sentinel */
};


void initdemo(void) {
	Py_InitModule("demo", demoMethods);
}