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/*
* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2008 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
*
*/
#ifndef GNUTLS_COMPRESS_H
# define GNUTLS_COMPRESS_H
int _gnutls_m_plaintext2compressed (gnutls_session_t session,
gnutls_datum_t * compressed,
const gnutls_datum_t *plaintext);
int _gnutls_m_compressed2plaintext (gnutls_session_t session,
gnutls_datum_t * plain,
const gnutls_datum_t* compressed);
/* Algorithm handling. */
int _gnutls_supported_compression_methods (gnutls_session_t session,
uint8_t ** comp);
int _gnutls_compression_is_ok (gnutls_compression_method_t algorithm);
int _gnutls_compression_get_num (gnutls_compression_method_t algorithm);
gnutls_compression_method_t _gnutls_compression_get_id (int num);
#ifdef HAVE_LIBZ
# include <zlib.h>
#endif
#define GNUTLS_COMP_FAILED NULL
typedef struct comp_hd_t_STRUCT
{
void *handle;
gnutls_compression_method_t algo;
} *comp_hd_t;
comp_hd_t _gnutls_comp_init (gnutls_compression_method_t, int d);
void _gnutls_comp_deinit (comp_hd_t handle, int d);
int _gnutls_decompress (comp_hd_t handle, opaque * compressed,
size_t compressed_size, opaque ** plain,
size_t max_record_size);
int _gnutls_compress (comp_hd_t, const opaque * plain, size_t plain_size,
opaque ** compressed, size_t max_comp_size);
struct gnutls_compression_entry
{
const char *name;
gnutls_compression_method_t id;
/* the number reserved in TLS for the specific compression method */
int num;
/* used in zlib compressor */
int window_bits;
int mem_level;
int comp_level;
};
typedef struct gnutls_compression_entry gnutls_compression_entry;
#endif
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