/* Copyright (C) 2010, 2011 Tony Garnock-Jones. All rights reserved. */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <stddef.h>

#include <assert.h>

#include "cmsg_private.h"
#include "ref.h"
#include "sexp.h"
#include "hashtable.h"
#include "node.h"
#include "meta.h"
#include "messages.h"

void init_meta(void) {
  sexp_t *args;
  args = INCREF(sexp_cons(sexp_cstring("meta"), NULL));
  new_node(lookup_node_class(cmsg_cstring_bytes("direct")), args, NULL);
  DECREF(args, sexp_destructor);
}

void announce_subscription(sexp_t *source,
			   sexp_t *filter,
			   sexp_t *sink,
			   sexp_t *name,
			   int onoff)
{
  post_node(cmsg_cstring_bytes("meta"),
	    sexp_data(source),
	    onoff
	      ? message_subscribed(source, filter, sink, name)
	      : message_unsubscribed(source, filter, sink, name),
	    NULL);
}