141 lines
6.8 KiB
C
141 lines
6.8 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TD_UTIL_COMPRESSION_H_
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#define _TD_UTIL_COMPRESSION_H_
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#include "os.h"
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#include "taos.h"
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#include "tutil.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define COMP_OVERFLOW_BYTES 2
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#define BITS_PER_BYTE 8
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// Masks
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#define INT64MASK(_x) ((((uint64_t)1) << _x) - 1)
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#define INT32MASK(_x) (((uint32_t)1 << _x) - 1)
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#define INT8MASK(_x) (((uint8_t)1 << _x) - 1)
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// Compression algorithm
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#define NO_COMPRESSION 0
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#define ONE_STAGE_COMP 1
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#define TWO_STAGE_COMP 2
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//
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// compressed data first byte foramt
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// ------ 7 bit ---- | ---- 1 bit ----
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// algorithm mode
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//
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// compression data mode save first byte lower 1 bit
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#define MODE_NOCOMPRESS 0 // original data
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#define MODE_COMPRESS 1 // compatible old compress
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// compression algorithm save first byte higher 7 bit
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#define ALGO_SZ_LOSSY 1 // SZ compress
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#define HEAD_MODE(x) x % 2
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#define HEAD_ALGO(x) x / 2
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#ifdef TD_TSZ
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extern bool lossyFloat;
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extern bool lossyDouble;
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int32_t tsCompressInit();
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void tsCompressExit();
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static FORCE_INLINE int32_t tsCompressFloatLossy(const char *const input, int32_t inputSize, const int32_t nelements,
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char *const output, int32_t outputSize, char algorithm,
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char *const buffer, int32_t bufferSize) {
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return tsCompressFloatLossyImp(input, nelements, output);
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}
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static FORCE_INLINE int32_t tsDecompressFloatLossy(const char *const input, int32_t compressedSize,
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const int32_t nelements, char *const output, int32_t outputSize,
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char algorithm, char *const buffer, int32_t bufferSize) {
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return tsDecompressFloatLossyImp(input, compressedSize, nelements, output);
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}
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static FORCE_INLINE int32_t tsCompressDoubleLossy(const char *const input, int32_t inputSize, const int32_t nelements,
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char *const output, int32_t outputSize, char algorithm,
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char *const buffer, int32_t bufferSize) {
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return tsCompressDoubleLossyImp(input, nelements, output);
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}
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static FORCE_INLINE int32_t tsDecompressDoubleLossy(const char *const input, int32_t compressedSize,
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const int32_t nelements, char *const output, int32_t outputSize,
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char algorithm, char *const buffer, int32_t bufferSize) {
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return tsDecompressDoubleLossyImp(input, compressedSize, nelements, output);
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}
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#endif
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/*************************************************************************
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* REGULAR COMPRESSION
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*************************************************************************/
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int32_t tsCompressTimestamp(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressTimestamp(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg,
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void *pBuf, int32_t nBuf);
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int32_t tsCompressFloat(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressFloat(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsCompressDouble(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressDouble(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsCompressString(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressString(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsCompressBool(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressBool(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsCompressTinyint(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressTinyint(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsCompressSmallint(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressSmallint(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg,
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void *pBuf, int32_t nBuf);
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int32_t tsCompressInt(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressInt(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsCompressBigint(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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int32_t tsDecompressBigint(void *pIn, int32_t nIn, int32_t nEle, void *pOut, int32_t nOut, uint8_t cmprAlg, void *pBuf,
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int32_t nBuf);
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/*************************************************************************
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* STREAM COMPRESSION
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*************************************************************************/
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typedef struct SCompressor SCompressor;
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int32_t tCompressorCreate(SCompressor **ppCmprsor);
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int32_t tCompressorDestroy(SCompressor *pCmprsor);
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int32_t tCompressStart(SCompressor *pCmprsor, int8_t type, int8_t cmprAlg);
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int32_t tCompressEnd(SCompressor *pCmprsor, const uint8_t **ppOut, int32_t *nOut, int32_t *nOrigin);
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int32_t tCompress(SCompressor *pCmprsor, const void *pData, int64_t nData);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_TD_UTIL_COMPRESSION_H_*/ |