path: root/lib/erl_interface/src/encode/encode_ref.c

/*
 * %CopyrightBegin%
 * 
 * Copyright Ericsson AB 1998-2009. All Rights Reserved.
 * 
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * %CopyrightEnd%
 */
#include <string.h>
#include "eidef.h"
#include "eiext.h"
#include "putget.h"

int ei_encode_ref(char *buf, int *index, const erlang_ref *p)
{
  char *s = buf + *index;
  char *s0 = s;
  int len = strlen(p->node);
  int i;

  /* Always encode as an extended reference; all participating parties
     are now expected to be able to decode extended references. */
      if (!buf) s += 1 + 2 + (3+len) + p->len*4 + 1;
      else {
	  put8(s,ERL_NEW_REFERENCE_EXT);

	  /* first, number of integers */
	  put16be(s, p->len);

	  /* then the nodename */
	  put8(s,ERL_ATOM_EXT);

	  put16be(s,len);
  
	  memmove(s, p->node, len);
	  s += len;

	  /* now the integers */
	  put8(s,(p->creation & 0x03));
	  for (i = 0; i < p->len; i++)
	      put32be(s,p->n[i]);

      }
  
  *index += s-s0;
  
  return 0;
}