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   1 /*
   2  * lzms_constants.h
   3  *
   4  * Constants for the LZMS compression format.
   5  */
   6
   7 #ifndef _LZMS_CONSTANTS_H
   8 #define _LZMS_CONSTANTS_H
   9
  10 #define LZMS_NUM_RECENT_OFFSETS                 3
  11 #define LZMS_MAX_INIT_RECENT_OFFSET             (LZMS_NUM_RECENT_OFFSETS + 1)
  12 #define LZMS_OFFSET_OFFSET                      (LZMS_NUM_RECENT_OFFSETS - 1)
  13
  14 #define LZMS_PROBABILITY_BITS                   6
  15 #define LZMS_PROBABILITY_MAX                    (1U << LZMS_PROBABILITY_BITS)
  16 #define LZMS_INITIAL_PROBABILITY                48
  17 #define LZMS_INITIAL_RECENT_BITS                0x0000000055555555ULL
  18
  19 #define LZMS_NUM_MAIN_STATES                    16
  20 #define LZMS_NUM_MATCH_STATES                   32
  21 #define LZMS_NUM_LZ_MATCH_STATES                64
  22 #define LZMS_NUM_LZ_REPEAT_MATCH_STATES         64
  23 #define LZMS_NUM_DELTA_MATCH_STATES             64
  24 #define LZMS_NUM_DELTA_REPEAT_MATCH_STATES      64
  25 #define LZMS_MAX_NUM_STATES                     64
  26
  27 #define LZMS_NUM_LITERAL_SYMS                   256
  28 #define LZMS_NUM_LEN_SYMS                       54
  29 #define LZMS_NUM_DELTA_POWER_SYMS               8
  30 #define LZMS_MAX_NUM_OFFSET_SYMS                799
  31 #define LZMS_MAX_NUM_SYMS                       799
  32
  33 #define LZMS_MAX_CODEWORD_LEN                   15
  34
  35 #define LZMS_LITERAL_CODE_REBUILD_FREQ          1024
  36 #define LZMS_LZ_OFFSET_CODE_REBUILD_FREQ        1024
  37 #define LZMS_LENGTH_CODE_REBUILD_FREQ           512
  38 #define LZMS_DELTA_OFFSET_CODE_REBUILD_FREQ     1024
  39 #define LZMS_DELTA_POWER_CODE_REBUILD_FREQ      512
  40
  41 #define LZMS_X86_MAX_GOOD_TARGET_OFFSET         65535
  42 #define LZMS_X86_MAX_TRANSLATION_OFFSET         1023
  43
  44 #endif /* _LZMS_CONSTANTS_H */