ceph/src/zstd/tests/zbufftest.c

   1 /*
   2  * Copyright (c) 2015-present, Yann Collet, Facebook, Inc.
   3  * All rights reserved.
   4  *
   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).
   8  * You may select, at your option, one of the above-listed licenses.
   9  */
  10
  11
  12 /*-************************************
  13 *  Compiler specific
  14 **************************************/
  15 #ifdef _MSC_VER    /* Visual Studio */
  16 #  define _CRT_SECURE_NO_WARNINGS     /* fgets */
  17 #  pragma warning(disable : 4127)     /* disable: C4127: conditional expression is constant */
  18 #  pragma warning(disable : 4146)     /* disable: C4146: minus unsigned expression */
  19 #endif
  20
  21
  22 /*-************************************
  23 *  Includes
  24 **************************************/
  25 #include <stdlib.h>       /* free */
  26 #include <stdio.h>        /* fgets, sscanf */
  27 #include <string.h>       /* strcmp */
  28 #include "timefn.h"       /* UTIL_time_t */
  29 #include "mem.h"
  30 #define ZSTD_STATIC_LINKING_ONLY   /* ZSTD_maxCLevel */
  31 #include "zstd.h"         /* ZSTD_compressBound */
  32 #define ZBUFF_STATIC_LINKING_ONLY  /* ZBUFF_createCCtx_advanced */
  33 #include "zbuff.h"        /* ZBUFF_isError */
  34 #include "datagen.h"      /* RDG_genBuffer */
  35 #define XXH_STATIC_LINKING_ONLY
  36 #include "xxhash.h"       /* XXH64_* */
  37 #include "util.h"
  38
  39
  40 /*-************************************
  41 *  Constants
  42 **************************************/
  43 #define KB *(1U<<10)
  44 #define MB *(1U<<20)
  45 #define GB *(1U<<30)
  46
  47 static const U32 nbTestsDefault = 10000;
  48 #define COMPRESSIBLE_NOISE_LENGTH (10 MB)
  49 #define FUZ_COMPRESSIBILITY_DEFAULT 50
  50 static const U32 prime1 = 2654435761U;
  51 static const U32 prime2 = 2246822519U;
  52
  53
  54
  55 /*-************************************
  56 *  Display Macros
  57 **************************************/
  58 #define DISPLAY(...)          fprintf(stderr, __VA_ARGS__)
  59 #define DISPLAYLEVEL(l, ...)  if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
  60 static U32 g_displayLevel = 2;
  61
  62 static const U64 g_refreshRate = SEC_TO_MICRO / 6;
  63 static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;
  64
  65 #define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
  66             if ((UTIL_clockSpanMicro(g_displayClock) > g_refreshRate) || (g_displayLevel>=4)) \
  67             { g_displayClock = UTIL_getTime(); DISPLAY(__VA_ARGS__); \
  68             if (g_displayLevel>=4) fflush(stderr); } }
  69
  70 static U64 g_clockTime = 0;
  71
  72
  73 /*-*******************************************************
  74 *  Fuzzer functions
  75 *********************************************************/
  76 #undef MIN
  77 #undef MAX
  78 #define MIN(a,b) ((a)<(b)?(a):(b))
  79 #define MAX(a,b) ((a)>(b)?(a):(b))
  80 /*! FUZ_rand() :
  81     @return : a 27 bits random value, from a 32-bits `seed`.
  82     `seed` is also modified */
  83 #  define FUZ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
  84 unsigned int FUZ_rand(unsigned int* seedPtr)
  85 {
  86     U32 rand32 = *seedPtr;
  87     rand32 *= prime1;
  88     rand32 += prime2;
  89     rand32  = FUZ_rotl32(rand32, 13);
  90     *seedPtr = rand32;
  91     return rand32 >> 5;
  92 }
  93
  94
  95 /*
  96 static unsigned FUZ_highbit32(U32 v32)
  97 {
  98     unsigned nbBits = 0;
  99     if (v32==0) return 0;
 100     for ( ; v32 ; v32>>=1) nbBits++;
 101     return nbBits;
 102 }
 103 */
 104
 105 static void* ZBUFF_allocFunction(void* opaque, size_t size)
 106 {
 107     void* address = malloc(size);
 108     (void)opaque;
 109     /* DISPLAYLEVEL(4, "alloc %p, %d opaque=%p \n", address, (int)size, opaque); */
 110     return address;
 111 }
 112
 113 static void ZBUFF_freeFunction(void* opaque, void* address)
 114 {
 115     (void)opaque;
 116     /* if (address) DISPLAYLEVEL(4, "free %p opaque=%p \n", address, opaque); */
 117     free(address);
 118 }
 119
 120 static int basicUnitTests(U32 seed, double compressibility, ZSTD_customMem customMem)
 121 {
 122     int testResult = 0;
 123     size_t CNBufferSize = COMPRESSIBLE_NOISE_LENGTH;
 124     void* CNBuffer = malloc(CNBufferSize);
 125     size_t const skippableFrameSize = 11;
 126     size_t const compressedBufferSize = (8 + skippableFrameSize) + ZSTD_compressBound(COMPRESSIBLE_NOISE_LENGTH);
 127     void* compressedBuffer = malloc(compressedBufferSize);
 128     size_t const decodedBufferSize = CNBufferSize;
 129     void* decodedBuffer = malloc(decodedBufferSize);
 130     size_t cSize, readSize, readSkipSize, genSize;
 131     U32 testNb=0;
 132     ZBUFF_CCtx* zc = ZBUFF_createCCtx_advanced(customMem);
 133     ZBUFF_DCtx* zd = ZBUFF_createDCtx_advanced(customMem);
 134
 135     /* Create compressible test buffer */
 136     if (!CNBuffer || !compressedBuffer || !decodedBuffer || !zc || !zd) {
 137         DISPLAY("Not enough memory, aborting\n");
 138         goto _output_error;
 139     }
 140     RDG_genBuffer(CNBuffer, CNBufferSize, compressibility, 0., seed);
 141
 142     /* generate skippable frame */
 143     MEM_writeLE32(compressedBuffer, ZSTD_MAGIC_SKIPPABLE_START);
 144     MEM_writeLE32(((char*)compressedBuffer)+4, (U32)skippableFrameSize);
 145     cSize = skippableFrameSize + 8;
 146
 147     /* Basic compression test */
 148     DISPLAYLEVEL(4, "test%3i : compress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
 149     ZBUFF_compressInitDictionary(zc, CNBuffer, 128 KB, 1);
 150     readSize = CNBufferSize;
 151     genSize = compressedBufferSize;
 152     { size_t const r = ZBUFF_compressContinue(zc, ((char*)compressedBuffer)+cSize, &genSize, CNBuffer, &readSize);
 153       if (ZBUFF_isError(r)) goto _output_error; }
 154     if (readSize != CNBufferSize) goto _output_error;   /* entire input should be consumed */
 155     cSize += genSize;
 156     genSize = compressedBufferSize - cSize;
 157     { size_t const r = ZBUFF_compressEnd(zc, ((char*)compressedBuffer)+cSize, &genSize);
 158       if (r != 0) goto _output_error; }  /* error, or some data not flushed */
 159     cSize += genSize;
 160     DISPLAYLEVEL(4, "OK (%u bytes : %.2f%%)\n", (U32)cSize, (double)cSize/COMPRESSIBLE_NOISE_LENGTH*100);
 161
 162     /* skippable frame test */
 163     DISPLAYLEVEL(4, "test%3i : decompress skippable frame : ", testNb++);
 164     ZBUFF_decompressInitDictionary(zd, CNBuffer, 128 KB);
 165     readSkipSize = cSize;
 166     genSize = CNBufferSize;
 167     { size_t const r = ZBUFF_decompressContinue(zd, decodedBuffer, &genSize, compressedBuffer, &readSkipSize);
 168       if (r != 0) goto _output_error; }
 169     if (genSize != 0) goto _output_error;   /* skippable frame len is 0 */
 170     DISPLAYLEVEL(4, "OK \n");
 171
 172     /* Basic decompression test */
 173     DISPLAYLEVEL(4, "test%3i : decompress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
 174     ZBUFF_decompressInitDictionary(zd, CNBuffer, 128 KB);
 175     readSize = cSize - readSkipSize;
 176     genSize = CNBufferSize;
 177     { size_t const r = ZBUFF_decompressContinue(zd, decodedBuffer, &genSize, ((char*)compressedBuffer)+readSkipSize, &readSize);
 178       if (r != 0) goto _output_error; }  /* should reach end of frame == 0; otherwise, some data left, or an error */
 179     if (genSize != CNBufferSize) goto _output_error;   /* should regenerate the same amount */
 180     if (readSize+readSkipSize != cSize) goto _output_error;   /* should have read the entire frame */
 181     DISPLAYLEVEL(4, "OK \n");
 182
 183     /* check regenerated data is byte exact */
 184     DISPLAYLEVEL(4, "test%3i : check decompressed result : ", testNb++);
 185     {   size_t i;
 186         for (i=0; i<CNBufferSize; i++) {
 187             if (((BYTE*)decodedBuffer)[i] != ((BYTE*)CNBuffer)[i]) goto _output_error;;
 188     }   }
 189     DISPLAYLEVEL(4, "OK \n");
 190
 191     /* Byte-by-byte decompression test */
 192     DISPLAYLEVEL(4, "test%3i : decompress byte-by-byte : ", testNb++);
 193     {   size_t r, pIn=0, pOut=0;
 194         do
 195         {   ZBUFF_decompressInitDictionary(zd, CNBuffer, 128 KB);
 196             r = 1;
 197             while (r) {
 198                 size_t inS = 1;
 199                 size_t outS = 1;
 200                 r = ZBUFF_decompressContinue(zd, ((BYTE*)decodedBuffer)+pOut, &outS, ((BYTE*)compressedBuffer)+pIn, &inS);
 201                 pIn += inS;
 202                 pOut += outS;
 203             }
 204             readSize = pIn;
 205             genSize = pOut;
 206         } while (genSize==0);
 207     }
 208     if (genSize != CNBufferSize) goto _output_error;   /* should regenerate the same amount */
 209     if (readSize != cSize) goto _output_error;   /* should have read the entire frame */
 210     DISPLAYLEVEL(4, "OK \n");
 211
 212     /* check regenerated data is byte exact */
 213     DISPLAYLEVEL(4, "test%3i : check decompressed result : ", testNb++);
 214     {   size_t i;
 215         for (i=0; i<CNBufferSize; i++) {
 216             if (((BYTE*)decodedBuffer)[i] != ((BYTE*)CNBuffer)[i]) goto _output_error;;
 217     }   }
 218     DISPLAYLEVEL(4, "OK \n");
 219
 220 _end:
 221     ZBUFF_freeCCtx(zc);
 222     ZBUFF_freeDCtx(zd);
 223     free(CNBuffer);
 224     free(compressedBuffer);
 225     free(decodedBuffer);
 226     return testResult;
 227
 228 _output_error:
 229     testResult = 1;
 230     DISPLAY("Error detected in Unit tests ! \n");
 231     goto _end;
 232 }
 233
 234
 235 static size_t findDiff(const void* buf1, const void* buf2, size_t max)
 236 {
 237     const BYTE* b1 = (const BYTE*)buf1;
 238     const BYTE* b2 = (const BYTE*)buf2;
 239     size_t u;
 240     for (u=0; u<max; u++) {
 241         if (b1[u] != b2[u]) break;
 242     }
 243     return u;
 244 }
 245
 246 static size_t FUZ_rLogLength(U32* seed, U32 logLength)
 247 {
 248     size_t const lengthMask = ((size_t)1 << logLength) - 1;
 249     return (lengthMask+1) + (FUZ_rand(seed) & lengthMask);
 250 }
 251
 252 static size_t FUZ_randomLength(U32* seed, U32 maxLog)
 253 {
 254     U32 const logLength = FUZ_rand(seed) % maxLog;
 255     return FUZ_rLogLength(seed, logLength);
 256 }
 257
 258 #define CHECK(cond, ...) if (cond) { DISPLAY("Error => "); DISPLAY(__VA_ARGS__); \
 259                          DISPLAY(" (seed %u, test nb %u)  \n", seed, testNb); goto _output_error; }
 260
 261 static int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibility)
 262 {
 263     static const U32 maxSrcLog = 24;
 264     static const U32 maxSampleLog = 19;
 265     BYTE* cNoiseBuffer[5];
 266     size_t const srcBufferSize = (size_t)1<<maxSrcLog;
 267     BYTE* copyBuffer;
 268     size_t const copyBufferSize= srcBufferSize + (1<<maxSampleLog);
 269     BYTE* cBuffer;
 270     size_t const cBufferSize   = ZSTD_compressBound(srcBufferSize);
 271     BYTE* dstBuffer;
 272     size_t dstBufferSize = srcBufferSize;
 273     U32 result = 0;
 274     U32 testNb = 0;
 275     U32 coreSeed = seed;
 276     ZBUFF_CCtx* zc;
 277     ZBUFF_DCtx* zd;
 278     UTIL_time_t startClock = UTIL_getTime();
 279
 280     /* allocations */
 281     zc = ZBUFF_createCCtx();
 282     zd = ZBUFF_createDCtx();
 283     cNoiseBuffer[0] = (BYTE*)malloc (srcBufferSize);
 284     cNoiseBuffer[1] = (BYTE*)malloc (srcBufferSize);
 285     cNoiseBuffer[2] = (BYTE*)malloc (srcBufferSize);
 286     cNoiseBuffer[3] = (BYTE*)malloc (srcBufferSize);
 287     cNoiseBuffer[4] = (BYTE*)malloc (srcBufferSize);
 288     copyBuffer= (BYTE*)malloc (copyBufferSize);
 289     dstBuffer = (BYTE*)malloc (dstBufferSize);
 290     cBuffer   = (BYTE*)malloc (cBufferSize);
 291     CHECK (!cNoiseBuffer[0] || !cNoiseBuffer[1] || !cNoiseBuffer[2] || !cNoiseBuffer[3] || !cNoiseBuffer[4] ||
 292            !copyBuffer || !dstBuffer || !cBuffer || !zc || !zd,
 293            "Not enough memory, fuzzer tests cancelled");
 294
 295     /* Create initial samples */
 296     RDG_genBuffer(cNoiseBuffer[0], srcBufferSize, 0.00, 0., coreSeed);    /* pure noise */
 297     RDG_genBuffer(cNoiseBuffer[1], srcBufferSize, 0.05, 0., coreSeed);    /* barely compressible */
 298     RDG_genBuffer(cNoiseBuffer[2], srcBufferSize, compressibility, 0., coreSeed);
 299     RDG_genBuffer(cNoiseBuffer[3], srcBufferSize, 0.95, 0., coreSeed);    /* highly compressible */
 300     RDG_genBuffer(cNoiseBuffer[4], srcBufferSize, 1.00, 0., coreSeed);    /* sparse content */
 301     memset(copyBuffer, 0x65, copyBufferSize);                             /* make copyBuffer considered initialized */
 302
 303     /* catch up testNb */
 304     for (testNb=1; testNb < startTest; testNb++)
 305         FUZ_rand(&coreSeed);
 306
 307     /* test loop */
 308     for ( ; (testNb <= nbTests) || (UTIL_clockSpanMicro(startClock) < g_clockTime) ; testNb++ ) {
 309         U32 lseed;
 310         const BYTE* srcBuffer;
 311         const BYTE* dict;
 312         size_t maxTestSize, dictSize;
 313         size_t cSize, totalTestSize, totalCSize, totalGenSize;
 314         size_t errorCode;
 315         U32 n, nbChunks;
 316         XXH64_state_t xxhState;
 317         U64 crcOrig;
 318
 319         /* init */
 320         DISPLAYUPDATE(2, "\r%6u", testNb);
 321         if (nbTests >= testNb) DISPLAYUPDATE(2, "/%6u   ", nbTests);
 322         FUZ_rand(&coreSeed);
 323         lseed = coreSeed ^ prime1;
 324
 325         /* states full reset (unsynchronized) */
 326         /* some issues only happen when reusing states in a specific sequence of parameters */
 327         if ((FUZ_rand(&lseed) & 0xFF) == 131) { ZBUFF_freeCCtx(zc); zc = ZBUFF_createCCtx(); }
 328         if ((FUZ_rand(&lseed) & 0xFF) == 132) { ZBUFF_freeDCtx(zd); zd = ZBUFF_createDCtx(); }
 329
 330         /* srcBuffer selection [0-4] */
 331         {   U32 buffNb = FUZ_rand(&lseed) & 0x7F;
 332             if (buffNb & 7) buffNb=2;   /* most common : compressible (P) */
 333             else {
 334                 buffNb >>= 3;
 335                 if (buffNb & 7) {
 336                     const U32 tnb[2] = { 1, 3 };   /* barely/highly compressible */
 337                     buffNb = tnb[buffNb >> 3];
 338                 } else {
 339                     const U32 tnb[2] = { 0, 4 };   /* not compressible / sparse */
 340                     buffNb = tnb[buffNb >> 3];
 341             }   }
 342             srcBuffer = cNoiseBuffer[buffNb];
 343         }
 344
 345         /* compression init */
 346         {   U32 const testLog = FUZ_rand(&lseed) % maxSrcLog;
 347             U32 const cLevel = (FUZ_rand(&lseed) % (ZSTD_maxCLevel() - (testLog/3))) + 1;
 348             maxTestSize = FUZ_rLogLength(&lseed, testLog);
 349             dictSize  = (FUZ_rand(&lseed)==1) ? FUZ_randomLength(&lseed, maxSampleLog) : 0;
 350             /* random dictionary selection */
 351             {   size_t const dictStart = FUZ_rand(&lseed) % (srcBufferSize - dictSize);
 352                 dict = srcBuffer + dictStart;
 353             }
 354             {   ZSTD_parameters params = ZSTD_getParams(cLevel, 0, dictSize);
 355                 params.fParams.checksumFlag = FUZ_rand(&lseed) & 1;
 356                 params.fParams.noDictIDFlag = FUZ_rand(&lseed) & 1;
 357                 {   size_t const initError = ZBUFF_compressInit_advanced(zc, dict, dictSize, params, ZSTD_CONTENTSIZE_UNKNOWN);
 358                     CHECK (ZBUFF_isError(initError),"init error : %s", ZBUFF_getErrorName(initError));
 359         }   }   }
 360
 361         /* multi-segments compression test */
 362         XXH64_reset(&xxhState, 0);
 363         nbChunks    = (FUZ_rand(&lseed) & 127) + 2;
 364         for (n=0, cSize=0, totalTestSize=0 ; (n<nbChunks) && (totalTestSize < maxTestSize) ; n++) {
 365             /* compress random chunk into random size dst buffer */
 366             {   size_t readChunkSize = FUZ_randomLength(&lseed, maxSampleLog);
 367                 size_t const randomDstSize = FUZ_randomLength(&lseed, maxSampleLog);
 368                 size_t dstBuffSize = MIN(cBufferSize - cSize, randomDstSize);
 369                 size_t const srcStart = FUZ_rand(&lseed) % (srcBufferSize - readChunkSize);
 370
 371                 size_t const compressionError = ZBUFF_compressContinue(zc, cBuffer+cSize, &dstBuffSize, srcBuffer+srcStart, &readChunkSize);
 372                 CHECK (ZBUFF_isError(compressionError), "compression error : %s", ZBUFF_getErrorName(compressionError));
 373
 374                 XXH64_update(&xxhState, srcBuffer+srcStart, readChunkSize);
 375                 memcpy(copyBuffer+totalTestSize, srcBuffer+srcStart, readChunkSize);
 376                 cSize += dstBuffSize;
 377                 totalTestSize += readChunkSize;
 378             }
 379
 380             /* random flush operation, to mess around */
 381             if ((FUZ_rand(&lseed) & 15) == 0) {
 382                 size_t const randomDstSize = FUZ_randomLength(&lseed, maxSampleLog);
 383                 size_t dstBuffSize = MIN(cBufferSize - cSize, randomDstSize);
 384                 size_t const flushError = ZBUFF_compressFlush(zc, cBuffer+cSize, &dstBuffSize);
 385                 CHECK (ZBUFF_isError(flushError), "flush error : %s", ZBUFF_getErrorName(flushError));
 386                 cSize += dstBuffSize;
 387         }   }
 388
 389         /* final frame epilogue */
 390         {   size_t remainingToFlush = (size_t)(-1);
 391             while (remainingToFlush) {
 392                 size_t const randomDstSize = FUZ_randomLength(&lseed, maxSampleLog);
 393                 size_t dstBuffSize = MIN(cBufferSize - cSize, randomDstSize);
 394                 U32 const enoughDstSize = dstBuffSize >= remainingToFlush;
 395                 remainingToFlush = ZBUFF_compressEnd(zc, cBuffer+cSize, &dstBuffSize);
 396                 CHECK (ZBUFF_isError(remainingToFlush), "flush error : %s", ZBUFF_getErrorName(remainingToFlush));
 397                 CHECK (enoughDstSize && remainingToFlush, "ZBUFF_compressEnd() not fully flushed (%u remaining), but enough space available", (U32)remainingToFlush);
 398                 cSize += dstBuffSize;
 399         }   }
 400         crcOrig = XXH64_digest(&xxhState);
 401
 402         /* multi - fragments decompression test */
 403         ZBUFF_decompressInitDictionary(zd, dict, dictSize);
 404         errorCode = 1;
 405         for (totalCSize = 0, totalGenSize = 0 ; errorCode ; ) {
 406             size_t readCSrcSize = FUZ_randomLength(&lseed, maxSampleLog);
 407             size_t const randomDstSize = FUZ_randomLength(&lseed, maxSampleLog);
 408             size_t dstBuffSize = MIN(dstBufferSize - totalGenSize, randomDstSize);
 409             errorCode = ZBUFF_decompressContinue(zd, dstBuffer+totalGenSize, &dstBuffSize, cBuffer+totalCSize, &readCSrcSize);
 410             CHECK (ZBUFF_isError(errorCode), "decompression error : %s", ZBUFF_getErrorName(errorCode));
 411             totalGenSize += dstBuffSize;
 412             totalCSize += readCSrcSize;
 413         }
 414         CHECK (errorCode != 0, "frame not fully decoded");
 415         CHECK (totalGenSize != totalTestSize, "decompressed data : wrong size")
 416         CHECK (totalCSize != cSize, "compressed data should be fully read")
 417         { U64 const crcDest = XXH64(dstBuffer, totalTestSize, 0);
 418           if (crcDest!=crcOrig) findDiff(copyBuffer, dstBuffer, totalTestSize);
 419           CHECK (crcDest!=crcOrig, "decompressed data corrupted"); }
 420
 421         /*=====   noisy/erroneous src decompression test   =====*/
 422
 423         /* add some noise */
 424         {   U32 const nbNoiseChunks = (FUZ_rand(&lseed) & 7) + 2;
 425             U32 nn; for (nn=0; nn<nbNoiseChunks; nn++) {
 426                 size_t const randomNoiseSize = FUZ_randomLength(&lseed, maxSampleLog);
 427                 size_t const noiseSize  = MIN((cSize/3) , randomNoiseSize);
 428                 size_t const noiseStart = FUZ_rand(&lseed) % (srcBufferSize - noiseSize);
 429                 size_t const cStart = FUZ_rand(&lseed) % (cSize - noiseSize);
 430                 memcpy(cBuffer+cStart, srcBuffer+noiseStart, noiseSize);
 431         }   }
 432
 433         /* try decompression on noisy data */
 434         ZBUFF_decompressInit(zd);
 435         totalCSize = 0;
 436         totalGenSize = 0;
 437         while ( (totalCSize < cSize) && (totalGenSize < dstBufferSize) ) {
 438             size_t readCSrcSize = FUZ_randomLength(&lseed, maxSampleLog);
 439             size_t const randomDstSize = FUZ_randomLength(&lseed, maxSampleLog);
 440             size_t dstBuffSize = MIN(dstBufferSize - totalGenSize, randomDstSize);
 441             size_t const decompressError = ZBUFF_decompressContinue(zd, dstBuffer+totalGenSize, &dstBuffSize, cBuffer+totalCSize, &readCSrcSize);
 442             if (ZBUFF_isError(decompressError)) break;   /* error correctly detected */
 443             totalGenSize += dstBuffSize;
 444             totalCSize += readCSrcSize;
 445     }   }
 446     DISPLAY("\r%u fuzzer tests completed   \n", testNb);
 447
 448 _cleanup:
 449     ZBUFF_freeCCtx(zc);
 450     ZBUFF_freeDCtx(zd);
 451     free(cNoiseBuffer[0]);
 452     free(cNoiseBuffer[1]);
 453     free(cNoiseBuffer[2]);
 454     free(cNoiseBuffer[3]);
 455     free(cNoiseBuffer[4]);
 456     free(copyBuffer);
 457     free(cBuffer);
 458     free(dstBuffer);
 459     return result;
 460
 461 _output_error:
 462     result = 1;
 463     goto _cleanup;
 464 }
 465
 466
 467 /*-*******************************************************
 468 *  Command line
 469 *********************************************************/
 470 int FUZ_usage(const char* programName)
 471 {
 472     DISPLAY( "Usage :\n");
 473     DISPLAY( "      %s [args]\n", programName);
 474     DISPLAY( "\n");
 475     DISPLAY( "Arguments :\n");
 476     DISPLAY( " -i#    : Nb of tests (default:%u) \n", nbTestsDefault);
 477     DISPLAY( " -s#    : Select seed (default:prompt user)\n");
 478     DISPLAY( " -t#    : Select starting test number (default:0)\n");
 479     DISPLAY( " -P#    : Select compressibility in %% (default:%i%%)\n", FUZ_COMPRESSIBILITY_DEFAULT);
 480     DISPLAY( " -v     : verbose\n");
 481     DISPLAY( " -p     : pause at the end\n");
 482     DISPLAY( " -h     : display help and exit\n");
 483     return 0;
 484 }
 485
 486
 487 int main(int argc, const char** argv)
 488 {
 489     U32 seed=0;
 490     int seedset=0;
 491     int argNb;
 492     int nbTests = nbTestsDefault;
 493     int testNb = 0;
 494     int proba = FUZ_COMPRESSIBILITY_DEFAULT;
 495     int result=0;
 496     U32 mainPause = 0;
 497     const char* programName = argv[0];
 498     ZSTD_customMem customMem = { ZBUFF_allocFunction, ZBUFF_freeFunction, NULL };
 499     ZSTD_customMem customNULL = { NULL, NULL, NULL };
 500
 501     /* Check command line */
 502     for(argNb=1; argNb<argc; argNb++) {
 503         const char* argument = argv[argNb];
 504         if(!argument) continue;   /* Protection if argument empty */
 505
 506         /* Parsing commands. Aggregated commands are allowed */
 507         if (argument[0]=='-') {
 508             argument++;
 509
 510             while (*argument!=0) {
 511                 switch(*argument)
 512                 {
 513                 case 'h':
 514                     return FUZ_usage(programName);
 515                 case 'v':
 516                     argument++;
 517                     g_displayLevel=4;
 518                     break;
 519                 case 'q':
 520                     argument++;
 521                     g_displayLevel--;
 522                     break;
 523                 case 'p': /* pause at the end */
 524                     argument++;
 525                     mainPause = 1;
 526                     break;
 527
 528                 case 'i':
 529                     argument++;
 530                     nbTests=0; g_clockTime=0;
 531                     while ((*argument>='0') && (*argument<='9')) {
 532                         nbTests *= 10;
 533                         nbTests += *argument - '0';
 534                         argument++;
 535                     }
 536                     break;
 537
 538                 case 'T':
 539                     argument++;
 540                     nbTests=0; g_clockTime=0;
 541                     while ((*argument>='0') && (*argument<='9')) {
 542                         g_clockTime *= 10;
 543                         g_clockTime += *argument - '0';
 544                         argument++;
 545                     }
 546                     if (*argument=='m') g_clockTime *=60, argument++;
 547                     if (*argument=='n') argument++;
 548                     g_clockTime *= SEC_TO_MICRO;
 549                     break;
 550
 551                 case 's':
 552                     argument++;
 553                     seed=0;
 554                     seedset=1;
 555                     while ((*argument>='0') && (*argument<='9')) {
 556                         seed *= 10;
 557                         seed += *argument - '0';
 558                         argument++;
 559                     }
 560                     break;
 561
 562                 case 't':
 563                     argument++;
 564                     testNb=0;
 565                     while ((*argument>='0') && (*argument<='9')) {
 566                         testNb *= 10;
 567                         testNb += *argument - '0';
 568                         argument++;
 569                     }
 570                     break;
 571
 572                 case 'P':   /* compressibility % */
 573                     argument++;
 574                     proba=0;
 575                     while ((*argument>='0') && (*argument<='9')) {
 576                         proba *= 10;
 577                         proba += *argument - '0';
 578                         argument++;
 579                     }
 580                     if (proba<0) proba=0;
 581                     if (proba>100) proba=100;
 582                     break;
 583
 584                 default:
 585                     return FUZ_usage(programName);
 586                 }
 587     }   }   }   /* for(argNb=1; argNb<argc; argNb++) */
 588
 589     /* Get Seed */
 590     DISPLAY("Starting zstd_buffered tester (%i-bits, %s)\n", (int)(sizeof(size_t)*8), ZSTD_VERSION_STRING);
 591
 592     if (!seedset) {
 593         time_t const t = time(NULL);
 594         U32 const h = XXH32(&t, sizeof(t), 1);
 595         seed = h % 10000;
 596     }
 597     DISPLAY("Seed = %u\n", seed);
 598     if (proba!=FUZ_COMPRESSIBILITY_DEFAULT) DISPLAY("Compressibility : %i%%\n", proba);
 599
 600     if (nbTests<=0) nbTests=1;
 601
 602     if (testNb==0) {
 603         result = basicUnitTests(0, ((double)proba) / 100, customNULL);  /* constant seed for predictability */
 604         if (!result) {
 605             DISPLAYLEVEL(4, "Unit tests using customMem :\n")
 606             result = basicUnitTests(0, ((double)proba) / 100, customMem);  /* use custom memory allocation functions */
 607     }   }
 608
 609     if (!result)
 610         result = fuzzerTests(seed, nbTests, testNb, ((double)proba) / 100);
 611
 612     if (mainPause) {
 613         int unused;
 614         DISPLAY("Press Enter \n");
 615         unused = getchar();
 616         (void)unused;
 617     }
 618     return result;
 619 }