1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340
|
/* lzo1b_de.h -- definitions for the the LZO1B/LZO1C algorithm
This file is part of the LZO real-time data compression library.
Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
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,
version 2, as published by the Free Software Foundation.
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
http://www.oberhumer.com/opensource/lzo/
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the library and is subject
to change.
*/
#ifndef __LZO_DEFS_H
#define __LZO_DEFS_H
#ifdef __cplusplus
extern "C" {
#endif
/***********************************************************************
//
************************************************************************/
/*
Format of the marker byte
76543210
--------
00000000 R0 - a long literal run ('R0' run)
000rrrrr R - a short literal run with len r
00100000 M4 - a very long match
001mmmmm M3 - a long match (len = m+M3_MIN_LEN)
mmmooooo M2 - a short match (len = m+M2_MIN_LEN, o = offset low bits)
M1 is not used !
*/
#ifndef R_BITS
#define R_BITS (5)
#endif
#ifndef M1L_BITS
#define M1L_BITS (0)
#endif
#ifndef M2L_BITS
#define M2L_BITS (CHAR_BIT - M2O_BITS)
#endif
#ifndef M3L_BITS
#define M3L_BITS (R_BITS)
#endif
#ifndef M4L_BITS
#define M4L_BITS (CHAR_BIT)
#endif
#ifndef M1O_BITS
#define M1O_BITS (6)
#endif
#ifndef M2O_BITS
#define M2O_BITS (R_BITS)
#endif
#ifndef M3O_BITS
#define M3O_BITS (CHAR_BIT)
#endif
#ifndef M4O_BITS
#define M4O_BITS (M3O_BITS) /* must be the same */
#endif
#ifndef M1X_BITS
#define M1X_BITS (M1O_BITS)
#endif
#ifndef M2X_BITS
#define M2X_BITS (M2O_BITS + CHAR_BIT)
#endif
#ifndef M3X_BITS
#define M3X_BITS (M3O_BITS + CHAR_BIT)
#endif
#ifndef M4X_BITS
#define M4X_BITS M3X_BITS
#endif
#define __MIN_OFFSET(bits) 1
#define __MAX_OFFSET(bits) LZO_LSIZE(bits)
#define M1_MIN_OFFSET __MIN_OFFSET(M1X_BITS)
#define M2_MIN_OFFSET __MIN_OFFSET(M2X_BITS)
#define M3_MIN_OFFSET __MIN_OFFSET(M3X_BITS)
#define M4_MIN_OFFSET M3_MIN_OFFSET
#if defined(LZO_EOF_CODE) && !defined(M3_EOF_OFFSET)
#define M3_EOF_OFFSET 1
#else
#define M3_EOF_OFFSET 0
#endif
#ifndef _M1_MAX_OFFSET
#define _M1_MAX_OFFSET __MAX_OFFSET(M1X_BITS)
#endif
#ifndef _M2_MAX_OFFSET
#define _M2_MAX_OFFSET __MAX_OFFSET(M2X_BITS)
#endif
#ifndef _M3_MAX_OFFSET
#define _M3_MAX_OFFSET (__MAX_OFFSET(M3X_BITS) - M3_EOF_OFFSET)
#endif
#ifndef _M4_MAX_OFFSET
#define _M4_MAX_OFFSET _M3_MAX_OFFSET
#endif
#ifndef _MAX_OFFSET
#define _MAX_OFFSET _M4_MAX_OFFSET
#endif
#if (M3_EOF_OFFSET > 0) && (_M2_MAX_OFFSET == _M3_MAX_OFFSET + M3_EOF_OFFSET)
# undef _M2_MAX_OFFSET
# define _M2_MAX_OFFSET _M3_MAX_OFFSET
#endif
#if (_M2_MAX_OFFSET > _M3_MAX_OFFSET)
# error
#endif
#define M1_MAX_OFFSET ((lzo_uint) _M1_MAX_OFFSET)
#define M2_MAX_OFFSET ((lzo_uint) _M2_MAX_OFFSET)
#define M3_MAX_OFFSET ((lzo_uint) _M3_MAX_OFFSET)
#define M4_MAX_OFFSET ((lzo_uint) _M4_MAX_OFFSET)
#define MAX_OFFSET ((lzo_uint) _MAX_OFFSET)
#ifndef M1_MIN_LEN
#define M1_MIN_LEN (2)
#endif
#ifndef M2_MIN_LEN
#define M2_MIN_LEN (3)
#endif
#ifndef M3_MIN_LEN
#if (M3X_BITS == M2X_BITS)
#define M3_MIN_LEN (M2_MAX_LEN + 1)
#else
#define M3_MIN_LEN (4)
#endif
#endif
#ifndef M4_MIN_LEN
#define M4_MIN_LEN (M3_MAX_LEN + 1)
#endif
#ifndef M1_MAX_LEN
#define M1_MAX_LEN (M1_MIN_LEN + LZO_SIZE(M1L_BITS) - 1)
#endif
#ifndef M2_MAX_LEN
#define M2_MAX_LEN (M2_MIN_LEN + LZO_SIZE(M2L_BITS) - 3)
#endif
#ifndef M3_MAX_LEN
#define M3_MAX_LEN (M3_MIN_LEN + LZO_SIZE(M3L_BITS) - 2)
#endif
#ifndef M4_MAX_LEN
#define M4_MAX_LEN (ULONG_MAX)
#endif
#define M1O_MASK LZO_MASK(M1O_BITS)
#define M1L_MASK LZO_MASK(M1L_BITS)
#define M2O_MASK LZO_MASK(M2O_BITS)
#define M2L_MASK LZO_MASK(M2L_BITS)
#define M3O_MASK LZO_MASK(M3O_BITS)
#define M3L_MASK LZO_MASK(M3L_BITS)
#define M4O_MASK LZO_MASK(M4O_BITS)
#define M4L_MASK LZO_MASK(M4L_BITS)
#define M1_MARKER (1 << M1O_BITS)
#define M2_MARKER (2 << M2O_BITS)
#define M3_MARKER (1 << M3L_BITS)
#define M4_MARKER M3_MARKER
/***********************************************************************
// R0 literal run (a long run)
************************************************************************/
#ifndef R0MIN
#define R0MIN (LZO_SIZE(R_BITS)) /* Minimum len of R0 run of literals */
#endif
#define R0MAX (R0MIN + 256 - 1) /* Maximum len of R0 run of literals */
#if (R0MAX - (R0MAX & ~7u) >= 7)
#define R0FAST (R0MAX & ~7u) /* R0MAX aligned to 8 byte boundary */
#else
#define R0FAST (R0MAX & ~15u) /* R0MAX aligned to 8 byte boundary */
#endif
#if (R0MAX - R0FAST < 7) || ((R0FAST & 7) != 0)
# error "something went wrong"
#endif
#if (R0FAST * 2 < 512)
# error "R0FAST is not big enough"
#endif
/* 7 special codes from R0FAST+1 .. R0MAX
* these codes mean long R0 runs with lengths
* 512, 1024, 2048, 4096, 8192, 16384, 32768
*/
/***********************************************************************
// matching
************************************************************************/
#define PS *m_pos++ != *ip++
/* We already matched M2_MIN_LEN bytes.
* Try to match another M2_MAX_LEN - M2_MIN_LEN bytes. */
#if (M2_MAX_LEN - M2_MIN_LEN == 4)
# define MATCH_M2X (PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 5)
# define MATCH_M2X (PS || PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 6)
# define MATCH_M2X (PS || PS || PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 7)
# define MATCH_M2X (PS || PS || PS || PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 13)
# define MATCH_M2X (PS || PS || PS || PS || PS || PS || PS || PS || \
PS || PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 14)
# define MATCH_M2X (PS || PS || PS || PS || PS || PS || PS || PS || \
PS || PS || PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 16)
# define MATCH_M2X (PS || PS || PS || PS || PS || PS || PS || PS || \
PS || PS || PS || PS || PS || PS || PS || PS)
#elif (M2_MAX_LEN - M2_MIN_LEN == 29)
# define MATCH_M2X (PS || PS || PS || PS || PS || PS || PS || PS || \
PS || PS || PS || PS || PS || PS || PS || PS || \
PS || PS || PS || PS || PS || PS || PS || PS || \
PS || PS || PS || PS || PS)
#else
# error "MATCH_M2X not yet implemented"
#endif
/* We already matched M2_MIN_LEN bytes.
* Try to match another M2_MAX_LEN + 1 - M2_MIN_LEN bytes
* to see if we get more than a M2 match */
#define MATCH_M2 (MATCH_M2X || PS)
/***********************************************************************
// copying
************************************************************************/
#define _CP *op++ = *m_pos++
#if (M2_MIN_LEN == 2)
# define COPY_M2X _CP
#elif (M2_MIN_LEN == 3)
# define COPY_M2X _CP; _CP
#elif (M2_MIN_LEN == 4)
# define COPY_M2X _CP; _CP; _CP
#else
# error "COPY_M2X not yet implemented"
#endif
#if (M3_MIN_LEN == 3)
# define COPY_M3X _CP; _CP
#elif (M3_MIN_LEN == 4)
# define COPY_M3X _CP; _CP; _CP
#elif (M3_MIN_LEN == 9)
# define COPY_M3X _CP; _CP; _CP; _CP; _CP; _CP; _CP; _CP
#else
# error "COPY_M3X not yet implemented"
#endif
#define COPY_M2 COPY_M2X; *op++ = *m_pos++
#define COPY_M3 COPY_M3X; *op++ = *m_pos++
/***********************************************************************
//
************************************************************************/
#if defined(LZO_NEED_DICT_H)
#define DL_MIN_LEN M2_MIN_LEN
#define D_INDEX1(d,p) d = DM(DMUL(0x21,DX3(p,5,5,6)) >> 5)
#define D_INDEX2(d,p) d = (d & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f)
#include "lzo_dict.h"
#ifndef MIN_LOOKAHEAD
#define MIN_LOOKAHEAD (M2_MAX_LEN + 1)
#endif
#ifndef MAX_LOOKBEHIND
#define MAX_LOOKBEHIND (MAX_OFFSET)
#endif
#endif /* defined(LZO_NEED_DICT_H) */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* already included */
/*
vi:ts=4:et
*/
|