Yann Collet | 32fb407 | 2017-08-18 16:52:05 -0700 | [diff] [blame] | 1 | /* |
Yann Collet | 4ded9e5 | 2016-08-30 10:04:33 -0700 | [diff] [blame] | 2 | * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. |
| 3 | * All rights reserved. |
| 4 | * |
Yann Collet | 32fb407 | 2017-08-18 16:52:05 -0700 | [diff] [blame] | 5 | * This source code is licensed under both the BSD-style license (found in the |
| 6 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
| 7 | * in the COPYING file in the root directory of this source tree). |
Yann Collet | 3128e03 | 2017-09-08 00:09:23 -0700 | [diff] [blame] | 8 | * You may select, at your option, one of the above-listed licenses. |
Yann Collet | 4ded9e5 | 2016-08-30 10:04:33 -0700 | [diff] [blame] | 9 | */ |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 10 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 11 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 12 | |
Przemyslaw Skibinski | 2f6ccee | 2016-12-21 13:23:34 +0100 | [diff] [blame] | 13 | /* ************************************** |
| 14 | * Compiler Warnings |
| 15 | ****************************************/ |
| 16 | #ifdef _MSC_VER |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 17 | # pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */ |
Przemyslaw Skibinski | 2f6ccee | 2016-12-21 13:23:34 +0100 | [diff] [blame] | 18 | #endif |
| 19 | |
| 20 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 21 | /*-************************************* |
| 22 | * Includes |
| 23 | ***************************************/ |
Przemyslaw Skibinski | 7a8a03c | 2016-12-21 15:08:44 +0100 | [diff] [blame] | 24 | #include "platform.h" /* Large Files support */ |
Przemyslaw Skibinski | 2f6ccee | 2016-12-21 13:23:34 +0100 | [diff] [blame] | 25 | #include "util.h" /* UTIL_getFileSize, UTIL_getTotalFileSize */ |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 26 | #include <stdlib.h> /* malloc, free */ |
| 27 | #include <string.h> /* memset */ |
| 28 | #include <stdio.h> /* fprintf, fopen, ftello64 */ |
inikep | 3733797 | 2016-05-10 14:22:55 +0200 | [diff] [blame] | 29 | #include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */ |
Yann Collet | a3d03a3 | 2016-07-06 16:27:17 +0200 | [diff] [blame] | 30 | #include <errno.h> /* errno */ |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 31 | |
Przemyslaw Skibinski | 2f6ccee | 2016-12-21 13:23:34 +0100 | [diff] [blame] | 32 | #include "mem.h" /* read */ |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 33 | #include "error_private.h" |
inikep | 23a0889 | 2016-04-22 12:43:18 +0200 | [diff] [blame] | 34 | #include "dibio.h" |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 35 | |
| 36 | |
| 37 | /*-************************************* |
| 38 | * Constants |
| 39 | ***************************************/ |
| 40 | #define KB *(1 <<10) |
| 41 | #define MB *(1 <<20) |
| 42 | #define GB *(1U<<30) |
| 43 | |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 44 | #define SAMPLESIZE_MAX (128 KB) |
| 45 | #define MEMMULT 11 /* rough estimation : memory cost to analyze 1 byte of sample */ |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 46 | #define COVER_MEMMULT 9 /* rough estimation : memory cost to analyze 1 byte of sample */ |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 47 | static const size_t g_maxMemory = (sizeof(size_t) == 4) ? (2 GB - 64 MB) : ((size_t)(512 MB) << sizeof(size_t)); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 48 | |
| 49 | #define NOISELENGTH 32 |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 50 | |
| 51 | |
| 52 | /*-************************************* |
| 53 | * Console display |
| 54 | ***************************************/ |
| 55 | #define DISPLAY(...) fprintf(stderr, __VA_ARGS__) |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 56 | #define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); } |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 57 | |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 58 | #define DISPLAYUPDATE(l, ...) if (displayLevel>=l) { \ |
| 59 | if ((DIB_clockSpan(g_time) > refreshRate) || (displayLevel>=4)) \ |
Yann Collet | f6ca09b | 2016-05-09 04:44:45 +0200 | [diff] [blame] | 60 | { g_time = clock(); DISPLAY(__VA_ARGS__); \ |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 61 | if (displayLevel>=4) fflush(stderr); } } |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 62 | static const clock_t refreshRate = CLOCKS_PER_SEC * 2 / 10; |
Yann Collet | f6ca09b | 2016-05-09 04:44:45 +0200 | [diff] [blame] | 63 | static clock_t g_time = 0; |
| 64 | |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 65 | static clock_t DIB_clockSpan(clock_t nPrevious) { return clock() - nPrevious; } |
Yann Collet | f6ca09b | 2016-05-09 04:44:45 +0200 | [diff] [blame] | 66 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 67 | |
| 68 | /*-************************************* |
| 69 | * Exceptions |
| 70 | ***************************************/ |
| 71 | #ifndef DEBUG |
| 72 | # define DEBUG 0 |
| 73 | #endif |
| 74 | #define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__); |
| 75 | #define EXM_THROW(error, ...) \ |
| 76 | { \ |
| 77 | DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \ |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 78 | DISPLAY("Error %i : ", error); \ |
| 79 | DISPLAY(__VA_ARGS__); \ |
| 80 | DISPLAY("\n"); \ |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 81 | exit(error); \ |
| 82 | } |
| 83 | |
| 84 | |
| 85 | /* ******************************************************** |
| 86 | * Helper functions |
| 87 | **********************************************************/ |
| 88 | unsigned DiB_isError(size_t errorCode) { return ERR_isError(errorCode); } |
| 89 | |
| 90 | const char* DiB_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); } |
| 91 | |
Sean Purcell | 42bac7f | 2017-04-13 15:35:05 -0700 | [diff] [blame] | 92 | #undef MIN |
| 93 | #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 94 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 95 | |
| 96 | /* ******************************************************** |
| 97 | * File related operations |
| 98 | **********************************************************/ |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 99 | /** DiB_loadFiles() : |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 100 | * load files listed in fileNamesTable into buffer, even if buffer is too small. |
| 101 | * @return : nb of files effectively loaded into `buffer` |
| 102 | * *bufferSizePtr is modified, it provides the amount data loaded within buffer */ |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 103 | static unsigned DiB_loadFiles(void* buffer, size_t* bufferSizePtr, |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 104 | size_t* chunkSizes, |
| 105 | const char** fileNamesTable, unsigned nbFiles, size_t targetChunkSize, |
| 106 | unsigned displayLevel) |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 107 | { |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 108 | char* const buff = (char*)buffer; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 109 | size_t pos = 0; |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 110 | unsigned nbLoadedChunks = 0, fileIndex; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 111 | |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 112 | for (fileIndex=0; fileIndex<nbFiles; fileIndex++) { |
| 113 | const char* const fileName = fileNamesTable[fileIndex]; |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 114 | unsigned long long const fs64 = UTIL_getFileSize(fileName); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 115 | unsigned long long remainingToLoad = fs64; |
| 116 | U32 const nbChunks = targetChunkSize ? (U32)((fs64 + (targetChunkSize-1)) / targetChunkSize) : 1; |
| 117 | U64 const chunkSize = targetChunkSize ? MIN(targetChunkSize, fs64) : fs64; |
Yann Collet | 25a6048 | 2017-09-15 11:55:13 -0700 | [diff] [blame^] | 118 | size_t const maxChunkSize = (size_t)MIN(chunkSize, SAMPLESIZE_MAX); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 119 | U32 cnb; |
| 120 | FILE* const f = fopen(fileName, "rb"); |
| 121 | if (f==NULL) EXM_THROW(10, "zstd: dictBuilder: %s %s ", fileName, strerror(errno)); |
| 122 | DISPLAYUPDATE(2, "Loading %s... \r", fileName); |
| 123 | for (cnb=0; cnb<nbChunks; cnb++) { |
Yann Collet | 25a6048 | 2017-09-15 11:55:13 -0700 | [diff] [blame^] | 124 | size_t const toLoad = (size_t)MIN(maxChunkSize, remainingToLoad); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 125 | if (toLoad > *bufferSizePtr-pos) break; |
| 126 | { size_t const readSize = fread(buff+pos, 1, toLoad, f); |
| 127 | if (readSize != toLoad) EXM_THROW(11, "Pb reading %s", fileName); |
| 128 | pos += readSize; |
| 129 | chunkSizes[nbLoadedChunks++] = toLoad; |
| 130 | remainingToLoad -= targetChunkSize; |
| 131 | if (toLoad < targetChunkSize) { |
Yann Collet | a969423 | 2017-09-15 10:16:26 -0700 | [diff] [blame] | 132 | fseek(f, (long)(targetChunkSize - toLoad), SEEK_CUR); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 133 | } } } |
| 134 | fclose(f); |
| 135 | } |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 136 | DISPLAYLEVEL(2, "\r%79s\r", ""); |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 137 | *bufferSizePtr = pos; |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 138 | DISPLAYLEVEL(4, "loaded : %u KB \n", (U32)(pos >> 10)) |
| 139 | return nbLoadedChunks; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 140 | } |
| 141 | |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 142 | #define DiB_rotl32(x,r) ((x << r) | (x >> (32 - r))) |
| 143 | static U32 DiB_rand(U32* src) |
| 144 | { |
| 145 | static const U32 prime1 = 2654435761U; |
| 146 | static const U32 prime2 = 2246822519U; |
| 147 | U32 rand32 = *src; |
| 148 | rand32 *= prime1; |
| 149 | rand32 ^= prime2; |
| 150 | rand32 = DiB_rotl32(rand32, 13); |
| 151 | *src = rand32; |
| 152 | return rand32 >> 5; |
| 153 | } |
| 154 | |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 155 | /* DiB_shuffle() : |
| 156 | * shuffle a table of file names in a semi-random way |
| 157 | * It improves dictionary quality by reducing "locality" impact, so if sample set is very large, |
| 158 | * it will load random elements from it, instead of just the first ones. */ |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 159 | static void DiB_shuffle(const char** fileNamesTable, unsigned nbFiles) { |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 160 | U32 seed = 0xFD2FB528; |
| 161 | unsigned i; |
| 162 | for (i = nbFiles - 1; i > 0; --i) { |
| 163 | unsigned const j = DiB_rand(&seed) % (i + 1); |
| 164 | const char* const tmp = fileNamesTable[j]; |
| 165 | fileNamesTable[j] = fileNamesTable[i]; |
| 166 | fileNamesTable[i] = tmp; |
| 167 | } |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 168 | } |
| 169 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 170 | |
| 171 | /*-******************************************************** |
| 172 | * Dictionary training functions |
| 173 | **********************************************************/ |
| 174 | static size_t DiB_findMaxMem(unsigned long long requiredMem) |
| 175 | { |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 176 | size_t const step = 8 MB; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 177 | void* testmem = NULL; |
| 178 | |
| 179 | requiredMem = (((requiredMem >> 23) + 1) << 23); |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 180 | requiredMem += step; |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 181 | if (requiredMem > g_maxMemory) requiredMem = g_maxMemory; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 182 | |
| 183 | while (!testmem) { |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 184 | testmem = malloc((size_t)requiredMem); |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 185 | requiredMem -= step; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | free(testmem); |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 189 | return (size_t)requiredMem; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | |
| 193 | static void DiB_fillNoise(void* buffer, size_t length) |
| 194 | { |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 195 | unsigned const prime1 = 2654435761U; |
| 196 | unsigned const prime2 = 2246822519U; |
| 197 | unsigned acc = prime1; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 198 | size_t p=0;; |
| 199 | |
| 200 | for (p=0; p<length; p++) { |
Yann Collet | bcb5f77 | 2016-07-06 15:41:03 +0200 | [diff] [blame] | 201 | acc *= prime2; |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 202 | ((unsigned char*)buffer)[p] = (unsigned char)(acc >> 21); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | |
| 207 | static void DiB_saveDict(const char* dictFileName, |
| 208 | const void* buff, size_t buffSize) |
| 209 | { |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 210 | FILE* const f = fopen(dictFileName, "wb"); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 211 | if (f==NULL) EXM_THROW(3, "cannot open %s ", dictFileName); |
| 212 | |
Yann Collet | f6ca09b | 2016-05-09 04:44:45 +0200 | [diff] [blame] | 213 | { size_t const n = fwrite(buff, 1, buffSize, f); |
| 214 | if (n!=buffSize) EXM_THROW(4, "%s : write error", dictFileName) } |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 215 | |
Yann Collet | f6ca09b | 2016-05-09 04:44:45 +0200 | [diff] [blame] | 216 | { size_t const n = (size_t)fclose(f); |
| 217 | if (n!=0) EXM_THROW(5, "%s : flush error", dictFileName) } |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 221 | typedef struct { |
| 222 | U64 totalSizeToLoad; |
| 223 | unsigned oneSampleTooLarge; |
| 224 | unsigned nbChunks; |
| 225 | } fileStats; |
| 226 | |
| 227 | static fileStats DiB_fileStats(const char** fileNamesTable, unsigned nbFiles, size_t chunkSize, unsigned displayLevel) |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 228 | { |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 229 | fileStats fs; |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 230 | unsigned n; |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 231 | memset(&fs, 0, sizeof(fs)); |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 232 | for (n=0; n<nbFiles; n++) { |
| 233 | U64 const fileSize = UTIL_getFileSize(fileNamesTable[n]); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 234 | U32 const nbChunks = (U32)(chunkSize ? (fileSize + (chunkSize-1)) / chunkSize : 1); |
| 235 | U64 const chunkToLoad = chunkSize ? MIN(chunkSize, fileSize) : fileSize; |
Yann Collet | 25a6048 | 2017-09-15 11:55:13 -0700 | [diff] [blame^] | 236 | size_t const cappedChunkSize = (size_t)MIN(chunkToLoad, SAMPLESIZE_MAX); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 237 | fs.totalSizeToLoad += cappedChunkSize * nbChunks; |
| 238 | fs.oneSampleTooLarge |= (chunkSize > 2*SAMPLESIZE_MAX); |
| 239 | fs.nbChunks += nbChunks; |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 240 | } |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 241 | DISPLAYLEVEL(4, "Preparing to load : %u KB \n", (U32)(fs.totalSizeToLoad >> 10)); |
| 242 | return fs; |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 246 | /*! ZDICT_trainFromBuffer_unsafe_legacy() : |
Yann Collet | 6f3acba | 2016-02-12 20:19:48 +0100 | [diff] [blame] | 247 | Strictly Internal use only !! |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 248 | Same as ZDICT_trainFromBuffer_legacy(), but does not control `samplesBuffer`. |
Yann Collet | 6f3acba | 2016-02-12 20:19:48 +0100 | [diff] [blame] | 249 | `samplesBuffer` must be followed by noisy guard band to avoid out-of-buffer reads. |
| 250 | @return : size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`) |
| 251 | or an error code. |
| 252 | */ |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 253 | size_t ZDICT_trainFromBuffer_unsafe_legacy(void* dictBuffer, size_t dictBufferCapacity, |
| 254 | const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples, |
| 255 | ZDICT_legacy_params_t parameters); |
Yann Collet | 6f3acba | 2016-02-12 20:19:48 +0100 | [diff] [blame] | 256 | |
| 257 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 258 | int DiB_trainFromFiles(const char* dictFileName, unsigned maxDictSize, |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 259 | const char** fileNamesTable, unsigned nbFiles, size_t chunkSize, |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 260 | ZDICT_legacy_params_t *params, ZDICT_cover_params_t *coverParams, |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 261 | int optimizeCover) |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 262 | { |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 263 | unsigned displayLevel = params ? params->zParams.notificationLevel : |
| 264 | coverParams ? coverParams->zParams.notificationLevel : |
| 265 | 0; /* should never happen */ |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 266 | void* const dictBuffer = malloc(maxDictSize); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 267 | fileStats const fs = DiB_fileStats(fileNamesTable, nbFiles, chunkSize, displayLevel); |
| 268 | size_t* const chunkSizes = (size_t*)malloc(fs.nbChunks * sizeof(size_t)); |
Nick Terrell | c220d4c | 2017-01-09 16:49:04 -0800 | [diff] [blame] | 269 | size_t const memMult = params ? MEMMULT : COVER_MEMMULT; |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 270 | size_t const maxMem = DiB_findMaxMem(fs.totalSizeToLoad * memMult) / memMult; |
| 271 | size_t loadedSize = (size_t) MIN ((unsigned long long)maxMem, fs.totalSizeToLoad); |
| 272 | void* const srcBuffer = malloc(loadedSize+NOISELENGTH); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 273 | int result = 0; |
| 274 | |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 275 | /* Checks */ |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 276 | if ((!chunkSizes) || (!srcBuffer) || (!dictBuffer)) |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 277 | EXM_THROW(12, "not enough memory for DiB_trainFiles"); /* should not happen */ |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 278 | if (fs.oneSampleTooLarge) { |
| 279 | DISPLAYLEVEL(2, "! Warning : some sample(s) are very large \n"); |
| 280 | DISPLAYLEVEL(2, "! Note that dictionary is only useful for small samples. \n"); |
| 281 | DISPLAYLEVEL(2, "! As a consequence, only the first %u bytes of each sample are loaded \n", SAMPLESIZE_MAX); |
Yann Collet | 1496c3d | 2016-12-18 11:58:23 +0100 | [diff] [blame] | 282 | } |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 283 | if (fs.nbChunks < 5) { |
Yann Collet | 49d105c | 2016-08-18 15:02:11 +0200 | [diff] [blame] | 284 | DISPLAYLEVEL(2, "! Warning : nb of samples too low for proper processing ! \n"); |
| 285 | DISPLAYLEVEL(2, "! Please provide _one file per sample_. \n"); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 286 | EXM_THROW(14, "nb of samples too low"); /* we now clearly forbid this case */ |
| 287 | } |
| 288 | if (fs.totalSizeToLoad < (unsigned long long)(8 * maxDictSize)) { |
| 289 | DISPLAYLEVEL(2, "! Warning : data size of samples too small for target dictionary size \n"); |
| 290 | DISPLAYLEVEL(2, "! Samples should be about 100x larger than target dictionary size \n"); |
Yann Collet | dd25a27 | 2016-07-27 12:35:29 +0200 | [diff] [blame] | 291 | } |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 292 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 293 | /* init */ |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 294 | if (loadedSize < fs.totalSizeToLoad) |
| 295 | DISPLAYLEVEL(1, "Not enough memory; training on %u MB only...\n", (unsigned)(loadedSize >> 20)); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 296 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 297 | /* Load input buffer */ |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 298 | DISPLAYLEVEL(3, "Shuffling input files\n"); |
| 299 | DiB_shuffle(fileNamesTable, nbFiles); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 300 | nbFiles = DiB_loadFiles(srcBuffer, &loadedSize, chunkSizes, fileNamesTable, nbFiles, chunkSize, displayLevel); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 301 | |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 302 | { size_t dictSize; |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 303 | if (params) { |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 304 | DiB_fillNoise((char*)srcBuffer + loadedSize, NOISELENGTH); /* guard band, for end of buffer condition */ |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 305 | dictSize = ZDICT_trainFromBuffer_unsafe_legacy(dictBuffer, maxDictSize, |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 306 | srcBuffer, chunkSizes, fs.nbChunks, |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 307 | *params); |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 308 | } else if (optimizeCover) { |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 309 | dictSize = ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, maxDictSize, |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 310 | srcBuffer, chunkSizes, fs.nbChunks, |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 311 | coverParams); |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 312 | if (!ZDICT_isError(dictSize)) { |
Nick Terrell | 5b7fd7c | 2017-06-26 21:07:14 -0700 | [diff] [blame] | 313 | DISPLAYLEVEL(2, "k=%u\nd=%u\nsteps=%u\n", coverParams->k, coverParams->d, coverParams->steps); |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 314 | } |
| 315 | } else { |
Yann Collet | 77c137b | 2017-09-14 15:12:57 -0700 | [diff] [blame] | 316 | dictSize = ZDICT_trainFromBuffer_cover(dictBuffer, maxDictSize, srcBuffer, |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 317 | chunkSizes, fs.nbChunks, *coverParams); |
Nick Terrell | df8415c | 2016-12-31 21:08:24 -0800 | [diff] [blame] | 318 | } |
Yann Collet | 290aaa7 | 2016-05-30 21:18:52 +0200 | [diff] [blame] | 319 | if (ZDICT_isError(dictSize)) { |
| 320 | DISPLAYLEVEL(1, "dictionary training failed : %s \n", ZDICT_getErrorName(dictSize)); /* should not happen */ |
| 321 | result = 1; |
| 322 | goto _cleanup; |
| 323 | } |
| 324 | /* save dict */ |
| 325 | DISPLAYLEVEL(2, "Save dictionary of size %u into file %s \n", (U32)dictSize, dictFileName); |
| 326 | DiB_saveDict(dictFileName, dictBuffer, dictSize); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 327 | } |
| 328 | |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 329 | /* clean up */ |
| 330 | _cleanup: |
| 331 | free(srcBuffer); |
Yann Collet | 086b959 | 2017-09-14 16:45:10 -0700 | [diff] [blame] | 332 | free(chunkSizes); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 333 | free(dictBuffer); |
Yann Collet | 71eafdd | 2016-02-12 02:31:57 +0100 | [diff] [blame] | 334 | return result; |
| 335 | } |