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37f1f2684f
As usual, the full release notes are found on Github: https://github.com/facebook/zstd/releases/tag/v1.4.5 Notable changes include: * Improved decompress performance on amd64 and arm (5-10% and 15-50%, respectively). * '--patch-from' zstd(1) CLI option, which provides something like a very fast version of bspatch(1) with slightly worse compression. See release notes. In this update, I dropped the 3-year old -O0 workaround for an LLVM ARM bug; the bug was fixed in LLVM SVN in 2017, but we didn't remove this workaround from our tree until now. MFC after: I won't, but feel free Relnotes: yes
54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/*
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* Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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#ifndef ZSTD_COMPRESS_SEQUENCES_H
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#define ZSTD_COMPRESS_SEQUENCES_H
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#include "../common/fse.h" /* FSE_repeat, FSE_CTable */
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#include "../common/zstd_internal.h" /* symbolEncodingType_e, ZSTD_strategy */
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typedef enum {
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ZSTD_defaultDisallowed = 0,
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ZSTD_defaultAllowed = 1
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} ZSTD_defaultPolicy_e;
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symbolEncodingType_e
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ZSTD_selectEncodingType(
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FSE_repeat* repeatMode, unsigned const* count, unsigned const max,
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size_t const mostFrequent, size_t nbSeq, unsigned const FSELog,
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FSE_CTable const* prevCTable,
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short const* defaultNorm, U32 defaultNormLog,
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ZSTD_defaultPolicy_e const isDefaultAllowed,
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ZSTD_strategy const strategy);
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size_t
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ZSTD_buildCTable(void* dst, size_t dstCapacity,
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FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type,
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unsigned* count, U32 max,
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const BYTE* codeTable, size_t nbSeq,
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const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax,
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const FSE_CTable* prevCTable, size_t prevCTableSize,
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void* entropyWorkspace, size_t entropyWorkspaceSize);
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size_t ZSTD_encodeSequences(
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void* dst, size_t dstCapacity,
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FSE_CTable const* CTable_MatchLength, BYTE const* mlCodeTable,
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FSE_CTable const* CTable_OffsetBits, BYTE const* ofCodeTable,
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FSE_CTable const* CTable_LitLength, BYTE const* llCodeTable,
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seqDef const* sequences, size_t nbSeq, int longOffsets, int bmi2);
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size_t ZSTD_fseBitCost(
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FSE_CTable const* ctable,
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unsigned const* count,
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unsigned const max);
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size_t ZSTD_crossEntropyCost(short const* norm, unsigned accuracyLog,
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unsigned const* count, unsigned const max);
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#endif /* ZSTD_COMPRESS_SEQUENCES_H */
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