release/src/router/lzo/src/lzo1x_1k.c

   1 /* lzo1x_1k.c -- LZO1X-1(11) compression (needs only 8kB work memory)
   2
   3    This file is part of the LZO real-time data compression library.
   4
   5    Copyright (C) 1996-2015 Markus Franz Xaver Johannes Oberhumer
   6    All Rights Reserved.
   7
   8    The LZO library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2 of
  11    the License, or (at your option) any later version.
  12
  13    The LZO library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with the LZO library; see the file COPYING.
  20    If not, write to the Free Software Foundation, Inc.,
  21    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22
  23    Markus F.X.J. Oberhumer
  24    <markus@oberhumer.com>
  25    http://www.oberhumer.com/opensource/lzo/
  26  */
  27
  28
  29 #include "lzo_conf.h"
  30 #if 1 && defined(UA_GET_LE32)
  31 #undef  LZO_DICT_USE_PTR
  32 #define LZO_DICT_USE_PTR 0
  33 #undef  lzo_dict_t
  34 #define lzo_dict_t lzo_uint16_t
  35 #endif
  36
  37 #define LZO_NEED_DICT_H 1
  38 #ifndef D_BITS
  39 #define D_BITS          11
  40 #endif
  41 #define D_INDEX1(d,p)       d = DM(DMUL(0x21,DX2(p,3,5)) >> 5)
  42 #define D_INDEX2(d,p)       d = d ^ D_MASK
  43 #if 1
  44 #define DINDEX(dv,p)        DM(((DMUL(0x1824429d,dv)) >> (32-D_BITS)))
  45 #else
  46 #define DINDEX(dv,p)        DM((dv) + ((dv) >> (32-D_BITS)))
  47 #endif
  48 #include "config1x.h"
  49 #define LZO_DETERMINISTIC !(LZO_DICT_USE_PTR)
  50
  51 #ifndef DO_COMPRESS
  52 #define DO_COMPRESS     lzo1x_1_11_compress
  53 #endif
  54
  55 #include "lzo1x_c.ch"
  56
  57 /* vim:set ts=4 sw=4 et: */