[8ebc79b] | 1 | /* |
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| 2 | zstd - standard compression library |
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| 3 | Header File for static linking only |
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| 4 | Copyright (C) 2014-2016, Yann Collet. |
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| 5 | |
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| 6 | BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php) |
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| 7 | |
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| 8 | Redistribution and use in source and binary forms, with or without |
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| 9 | modification, are permitted provided that the following conditions are |
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| 10 | met: |
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| 11 | * Redistributions of source code must retain the above copyright |
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| 12 | notice, this list of conditions and the following disclaimer. |
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| 13 | * Redistributions in binary form must reproduce the above |
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| 14 | copyright notice, this list of conditions and the following disclaimer |
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| 15 | in the documentation and/or other materials provided with the |
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| 16 | distribution. |
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| 17 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| 18 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| 19 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| 20 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| 21 | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 22 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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| 23 | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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| 27 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | |
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| 29 | You can contact the author at : |
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| 30 | - zstd homepage : http://www.zstd.net |
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| 31 | */ |
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| 32 | #ifndef ZSTD_STATS_H |
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| 33 | #define ZSTD_STATS_H |
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| 34 | |
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| 35 | |
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| 36 | #if defined (__cplusplus) |
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| 37 | extern "C" { |
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| 38 | #endif |
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| 39 | |
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| 40 | |
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| 41 | /*-************************************* |
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| 42 | * Types |
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| 43 | ***************************************/ |
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| 44 | struct ZSTD_stats_s { |
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| 45 | U32 priceOffset, priceOffCode, priceMatchLength, priceLiteral, priceLitLength; |
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| 46 | U32 totalMatchSum, totalLitSum, totalSeqSum, totalRepSum; |
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| 47 | U32 litSum, matchLengthSum, litLengthSum, offCodeSum; |
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| 48 | U32 matchLengthFreq[MaxML+1]; |
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| 49 | U32 litLengthFreq[MaxLL+1]; |
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| 50 | U32 litFreq[1<<Litbits]; |
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| 51 | U32 offCodeFreq[MaxOff+1]; |
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| 52 | }; |
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| 53 | |
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| 54 | |
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| 55 | /*-************************************* |
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| 56 | * Stats functions |
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| 57 | ***************************************/ |
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| 58 | MEM_STATIC ZSTD_stats_t* ZSTD_statsAlloc() { return malloc(sizeof(ZSTD_stats_t)); } |
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| 59 | MEM_STATIC void ZSTD_statsFree(struct ZSTD_stats_s* stats) { free(stats); } |
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| 60 | |
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| 61 | MEM_STATIC void ZSTD_statsPrint(ZSTD_stats_t* stats, U32 searchLength) |
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| 62 | { |
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| 63 | stats->totalMatchSum += stats->totalSeqSum * ((searchLength == 3) ? 3 : 4); |
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| 64 | printf("\navgMatchL=%.2f avgLitL=%.2f match=%.1f%% lit=%.1f%% reps=%d seq=%d\n", (float)stats->totalMatchSum/stats->totalSeqSum, (float)stats->totalLitSum/stats->totalSeqSum, 100.0*stats->totalMatchSum/(stats->totalMatchSum+stats->totalLitSum), 100.0*stats->totalLitSum/(stats->totalMatchSum+stats->totalLitSum), stats->totalRepSum, stats->totalSeqSum); |
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| 65 | printf("SumBytes=%d Offset=%d OffCode=%d Match=%d Literal=%d LitLength=%d\n", (stats->priceOffset+stats->priceOffCode+stats->priceMatchLength+stats->priceLiteral+stats->priceLitLength)/8, stats->priceOffset/8, stats->priceOffCode/8, stats->priceMatchLength/8, stats->priceLiteral/8, stats->priceLitLength/8); |
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| 66 | } |
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| 67 | |
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| 68 | |
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| 69 | MEM_STATIC void ZSTD_statsInit(ZSTD_stats_t* stats) |
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| 70 | { |
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| 71 | stats->totalLitSum = stats->totalMatchSum = stats->totalSeqSum = stats->totalRepSum = 1; |
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| 72 | stats->priceOffset = stats->priceOffCode = stats->priceMatchLength = stats->priceLiteral = stats->priceLitLength = 0; |
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| 73 | } |
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| 74 | |
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| 75 | |
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| 76 | MEM_STATIC void ZSTD_statsResetFreqs(ZSTD_stats_t* stats) |
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| 77 | { |
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| 78 | unsigned u; |
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| 79 | |
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| 80 | stats->litSum = (2<<Litbits); |
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| 81 | stats->litLengthSum = MaxLL+1; |
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| 82 | stats->matchLengthSum = MaxML+1; |
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| 83 | stats->offCodeSum = (MaxOff+1); |
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| 84 | |
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| 85 | for (u=0; u<=MaxLit; u++) |
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| 86 | stats->litFreq[u] = 1; |
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| 87 | for (u=0; u<=MaxLL; u++) |
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| 88 | stats->litLengthFreq[u] = 1; |
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| 89 | for (u=0; u<=MaxML; u++) |
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| 90 | stats->matchLengthFreq[u] = 1; |
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| 91 | for (u=0; u<=MaxOff; u++) |
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| 92 | stats->offCodeFreq[u] = 1; |
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| 93 | } |
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| 94 | |
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| 95 | |
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| 96 | MEM_STATIC void ZSTD_statsUpdatePrices(ZSTD_stats_t* stats, size_t litLength, const BYTE* literals, size_t offset, size_t matchLength) |
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| 97 | { |
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| 98 | U32 u; |
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| 99 | /* literals */ |
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| 100 | stats->priceLiteral += litLength * ZSTD_highbit(stats->litSum+1); |
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| 101 | for (u=0; u < litLength; u++) |
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| 102 | stats->priceLiteral -= ZSTD_highbit(stats->litFreq[literals[u]]+1); |
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| 103 | stats->litSum += litLength; |
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| 104 | for (u=0; u < litLength; u++) |
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| 105 | stats->litFreq[literals[u]]++; |
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| 106 | |
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| 107 | /* literal Length */ |
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| 108 | { static const BYTE LL_Code[64] = { 0, 1, 2, 3, 4, 5, 6, 7, |
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| 109 | 8, 9, 10, 11, 12, 13, 14, 15, |
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| 110 | 16, 16, 17, 17, 18, 18, 19, 19, |
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| 111 | 20, 20, 20, 20, 21, 21, 21, 21, |
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| 112 | 22, 22, 22, 22, 22, 22, 22, 22, |
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| 113 | 23, 23, 23, 23, 23, 23, 23, 23, |
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| 114 | 24, 24, 24, 24, 24, 24, 24, 24, |
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| 115 | 24, 24, 24, 24, 24, 24, 24, 24 }; |
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| 116 | const BYTE LL_deltaCode = 19; |
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| 117 | const BYTE llCode = (litLength>63) ? (BYTE)ZSTD_highbit(litLength) + LL_deltaCode : LL_Code[litLength]; |
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| 118 | if (litLength) { |
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| 119 | stats->priceLitLength += LL_bits[llCode] + ZSTD_highbit(stats->litLengthSum+1) - ZSTD_highbit(stats->litLengthFreq[llCode]+1); |
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| 120 | } else { |
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| 121 | stats->priceLitLength += ZSTD_highbit(stats->litLengthSum+1) - ZSTD_highbit(stats->litLengthFreq[0]+1); |
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| 122 | } |
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| 123 | stats->litLengthFreq[llCode]++; |
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| 124 | stats->litLengthSum++; |
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| 125 | } |
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| 126 | |
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| 127 | /* match offset */ |
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| 128 | { BYTE offCode = (BYTE)ZSTD_highbit(offset+1); |
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| 129 | stats->priceOffCode += ZSTD_highbit(stats->offCodeSum+1) - ZSTD_highbit(stats->offCodeFreq[offCode]+1); |
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| 130 | stats->priceOffset += offCode; |
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| 131 | stats->offCodeSum++; |
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| 132 | stats->offCodeFreq[offCode]++; |
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| 133 | } |
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| 134 | |
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| 135 | /* match Length */ |
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| 136 | { static const BYTE ML_Code[128] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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| 137 | 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, |
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| 138 | 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, |
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| 139 | 38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39, |
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| 140 | 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, |
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| 141 | 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, |
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| 142 | 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, |
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| 143 | 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42 }; |
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| 144 | const BYTE ML_deltaCode = 36; |
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| 145 | const BYTE mlCode = (matchLength>127) ? (BYTE)ZSTD_highbit(matchLength) + ML_deltaCode : ML_Code[matchLength]; |
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| 146 | stats->priceMatchLength += ML_bits[mlCode] + ZSTD_highbit(stats->matchLengthSum+1) - ZSTD_highbit(stats->matchLengthFreq[mlCode]+1); |
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| 147 | stats->matchLengthFreq[mlCode]++; |
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| 148 | stats->matchLengthSum++; |
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| 149 | } |
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| 150 | |
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| 151 | if (offset == 0) stats->totalRepSum++; |
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| 152 | stats->totalSeqSum++; |
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| 153 | stats->totalMatchSum += matchLength; |
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| 154 | stats->totalLitSum += litLength; |
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| 155 | } |
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| 156 | |
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| 157 | |
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| 158 | #if defined (__cplusplus) |
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| 159 | } |
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| 160 | #endif |
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| 161 | |
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| 162 | #endif /* ZSTD_STATIC_H */ |
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