lzo1.h

lzo-1.08-src.zip 高效的压缩解压代码

/* lzo1.h -- public interface of the LZO1 compression algorithm

   This file is part of the LZO real-time data compression library.

   Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
   All Rights Reserved.

   The LZO library is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of
   the License, or (at your option) any later version.

   The LZO 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with the LZO library; see the file COPYING.
   If not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Markus F.X.J. Oberhumer
   <[e-mail]>
   http://www.oberhumer.com/opensource/lzo/
 */


#ifndef __LZO1_H
#define __LZO1_H

#ifndef __LZOCONF_H
#include <lzoconf.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif


/***********************************************************************
//
************************************************************************/

/* Memory required for the wrkmem parameter.
 * When the required size is 0, you can also pass a NULL pointer.
 */

#define LZO1_MEM_COMPRESS       ((lzo_uint32) (8192L * lzo_sizeof_dict_t))
#define LZO1_MEM_DECOMPRESS     (0)


LZO_EXTERN(int)
lzo1_compress           ( const lzo_byte *src, lzo_uint  src_len,
                                lzo_byte *dst, lzo_uintp dst_len,
                                lzo_voidp wrkmem );

LZO_EXTERN(int)
lzo1_decompress         ( const lzo_byte *src, lzo_uint  src_len,
                                lzo_byte *dst, lzo_uintp dst_len,
                                lzo_voidp wrkmem /* NOT USED */ );


/***********************************************************************
// better compression ratio at the cost of more memory and time
************************************************************************/

#define LZO1_99_MEM_COMPRESS    ((lzo_uint32) (65536L * lzo_sizeof_dict_t))

#if !defined(LZO_99_UNSUPPORTED)
LZO_EXTERN(int)
lzo1_99_compress        ( const lzo_byte *src, lzo_uint  src_len,
                                lzo_byte *dst, lzo_uintp dst_len,
                                lzo_voidp wrkmem );
#endif



#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* already included */