/*
 * Copyright (C) 2000, 2004, 2005 Free Software Foundation
 *
 * Author: Nikos Mavrogiannopoulos
 *
 * This file is part of GNUTLS.
 *
 * The GNUTLS library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA
 *
 */

/* This file contains the functions which convert the TLS plaintext
 * packet to TLS compressed packet.
 */

#include "gnutls_int.h"
#include "gnutls_compress.h"
#include "gnutls_errors.h"
#include "gnutls_compress_int.h"

/* These functions allocate the return value internally
 */
int
_gnutls_m_plaintext2compressed (gnutls_session_t session,
				gnutls_datum_t * compressed,
				gnutls_datum_t plaintext)
{
  int size;
  opaque *data;

  size =
    _gnutls_compress (session->connection_state.write_compression_state,
		      plaintext.data, plaintext.size, &data,
		      MAX_RECORD_SEND_SIZE + 1024);
  if (size < 0)
    {
      gnutls_assert ();
      return GNUTLS_E_COMPRESSION_FAILED;
    }
  compressed->data = data;
  compressed->size = size;

  return 0;
}

int
_gnutls_m_compressed2plaintext (gnutls_session_t session,
				gnutls_datum_t * plain,
				gnutls_datum_t compressed)
{
  int size;
  opaque *data;

  size =
    _gnutls_decompress (session->connection_state.
			read_compression_state, compressed.data,
			compressed.size, &data, MAX_RECORD_RECV_SIZE);
  if (size < 0)
    {
      gnutls_assert ();
      return GNUTLS_E_DECOMPRESSION_FAILED;
    }
  plain->data = data;
  plain->size = size;

  return 0;
}