LINUXCNC的python模块生成函数

	char *name;
	char *prefix = 0;
	halobject *self = (halobject *)_self;
	if(!PyArg_ParseTuple(args, "s|s:hal.component", &name, &prefix)) return -1;
	self->items = new itemmap();
	self->hal_id = hal_init(name);
	if(self->hal_id <= 0) {
	pyhal_error(self->hal_id);
	return -1;
	}
	self->name = strdup(name);
	self->prefix = strdup(prefix ? prefix : name);
	if(!self->name) {
	PyErr_SetString(PyExc_MemoryError, "strdup(name) failed");
	return -1;
	}
	if(!self->prefix) {
	PyErr_SetString(PyExc_MemoryError, "strdup(prefix) failed");
	return -1;
	}