90 lines
1.9 KiB
C
90 lines
1.9 KiB
C
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// File: lzham_lzdecompbase.h
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// See Copyright Notice and license at the end of include/lzham.h
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#pragma once
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//#define LZHAM_LZDEBUG
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#define LZHAM_IS_MATCH_MODEL_INDEX(cur_state) (cur_state)
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namespace lzham
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{
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struct table_update_settings
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{
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uint16 m_max_update_interval;
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uint16 m_slow_rate;
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};
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extern table_update_settings g_table_update_settings[];
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struct CLZDecompBase
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{
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enum
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{
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cMinMatchLen = 2U,
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cMaxMatchLen = 257U,
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cMaxHugeMatchLen = 65536,
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cMinDictSizeLog2 = 15,
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cMaxDictSizeLog2 = 29,
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cMatchHistSize = 4,
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cMaxLen2MatchDist = 2047
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};
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enum
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{
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cLZXNumSecondaryLengths = 249,
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cNumHugeMatchCodes = 1,
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cMaxHugeMatchCodeBits = 16,
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cLZXNumSpecialLengths = 2,
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cLZXLowestUsableMatchSlot = 1,
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cLZXMaxPositionSlots = 128
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};
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enum
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{
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cLZXSpecialCodeEndOfBlockCode = 0,
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cLZXSpecialCodePartialStateReset = 1
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};
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enum
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{
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cLZHAMDebugSyncMarkerValue = 666,
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cLZHAMDebugSyncMarkerBits = 12
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};
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enum
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{
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cBlockHeaderBits = 2,
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cBlockCheckBits = 4,
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cBlockFlushTypeBits = 2,
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cSyncBlock = 0,
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cCompBlock = 1,
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cRawBlock = 2,
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cEOFBlock = 3
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};
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enum
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{
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cNumStates = 12,
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cNumLitStates = 7,
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};
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uint m_dict_size_log2;
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uint m_dict_size;
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uint m_num_lzx_slots;
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static uint m_lzx_position_base[cLZXMaxPositionSlots];
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static uint m_lzx_position_extra_mask[cLZXMaxPositionSlots];
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static uint8 m_lzx_position_extra_bits[cLZXMaxPositionSlots];
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void init_position_slots(uint dict_size_log2);
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};
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} // namespace lzham
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