Esempio n. 1
0
//sort verts into top, mid, bot   aim: get the sequence of the triedge.
void getTri(vert* vert1, vert* vert2, vert* vert3, edge* triEdge)
{
	float top, mid, bot;
	vert* topVert;
	vert* midVert;
	vert* botVert;
    
    
	if((vert1->coord[1] != vert2->coord[1])&&(vert1->coord[1] != vert3->coord[1])&&(vert3->coord[1] != vert2->coord[1])){   //case 1
		top = vert1->coord[1];
		mid = vert2->coord[1];
		bot = vert3->coord[1];

		sort(&top, &mid, &bot);
		//TRACE("\n\n\nEdge_top: %f, Edge_mid: %f, Edge_bot: %f\n", top, mid, bot);
		topVert = findPosition(top, 1, vert1, vert2, vert3);
		midVert = findPosition(mid, 2, vert1, vert2, vert3);
		botVert = findPosition(bot, 3, vert1, vert2, vert3);
		

		//get left and right attribute
		getEdge(triEdge, topVert, midVert, botVert);

	}else if((vert1->coord[1] == vert2->coord[1])||(vert1->coord[1] == vert3->coord[1])||(vert3->coord[1] == vert2->coord[1])){
		vert diff, sameY1, sameY2;
		
		int position = 0; //HORIZANTAL LINE ; TOP = 1 OR BOTTOM = 0

		/*position = */findDiff(&diff, &sameY1, &sameY2, *vert1, *vert2, *vert3);   // let Y1 be the left vert and Y2 be the right vert.

		getEdgeHor(triEdge,diff, sameY1, sameY2);
	}
		//get A, B, C for each edge
		getABC(&triEdge[0]);
		getABC(&triEdge[1]);
		getABC(&triEdge[2]);
}
Esempio n. 2
0
int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibility)
{
    BYTE* cNoiseBuffer[5];
    BYTE* srcBuffer;
    size_t srcBufferSize = (size_t)1<<maxSrcLog;
    BYTE* copyBuffer;
    size_t copyBufferSize = srcBufferSize + (1<<maxSampleLog);
    BYTE* cBuffer;
    size_t cBufferSize   = ZSTD_compressBound(srcBufferSize);
    BYTE* dstBuffer;
    size_t dstBufferSize = srcBufferSize;
    U32 result = 0;
    U32 testNb = 0;
    U32 coreSeed = seed, lseed = 0;
    ZBUFF_CCtx* zc;
    ZBUFF_DCtx* zd;
    XXH64_state_t crc64;
    U32 startTime = FUZ_GetMilliStart();

    /* allocation */
    zc = ZBUFF_createCCtx();
    zd = ZBUFF_createDCtx();
    cNoiseBuffer[0] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[1] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[2] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[3] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[4] = (BYTE*)malloc (srcBufferSize);
    copyBuffer= (BYTE*)malloc (copyBufferSize);
    dstBuffer = (BYTE*)malloc (dstBufferSize);
    cBuffer   = (BYTE*)malloc (cBufferSize);
    CHECK (!cNoiseBuffer[0] || !cNoiseBuffer[1] || !cNoiseBuffer[2] || !cNoiseBuffer[3] || !cNoiseBuffer[4] ||
           !copyBuffer || !dstBuffer || !cBuffer || !zc || !zd,
           "Not enough memory, fuzzer tests cancelled");

    /* Create initial samples */
    RDG_genBuffer(cNoiseBuffer[0], srcBufferSize, 0.00, 0., coreSeed);    /* pure noise */
    RDG_genBuffer(cNoiseBuffer[1], srcBufferSize, 0.05, 0., coreSeed);    /* barely compressible */
    RDG_genBuffer(cNoiseBuffer[2], srcBufferSize, compressibility, 0., coreSeed);
    RDG_genBuffer(cNoiseBuffer[3], srcBufferSize, 0.95, 0., coreSeed);    /* highly compressible */
    RDG_genBuffer(cNoiseBuffer[4], srcBufferSize, 1.00, 0., coreSeed);    /* sparse content */
    srcBuffer = cNoiseBuffer[2];
    memset(copyBuffer, 0x65, copyBufferSize);
    memcpy(copyBuffer, srcBuffer, MIN(copyBufferSize,srcBufferSize));   /* make copyBuffer considered initialized */

    /* catch up testNb */
    for (testNb=1; testNb < startTest; testNb++)
        FUZ_rand(&coreSeed);

    /* test loop */
    for ( ; (testNb <= nbTests) || (FUZ_GetMilliSpan(startTime) < g_testTime); testNb++ )
    {
        size_t sampleSize, sampleStart;
        size_t cSize;
        size_t maxTestSize, totalTestSize, readSize, totalCSize, genSize, totalGenSize;
        size_t errorCode;
        U32 sampleSizeLog, buffNb, n, nbChunks;
        U64 crcOrig, crcDest;

        /* init */
        DISPLAYUPDATE(2, "\r%6u", testNb);
        if (nbTests >= testNb) DISPLAYUPDATE(2, "/%6u   ", nbTests);
        FUZ_rand(&coreSeed);
        lseed = coreSeed ^ prime1;
        buffNb = FUZ_rand(&lseed) & 127;
        if (buffNb & 7) buffNb=2;   /* select buffer */
        else
        {
            buffNb >>= 3;
            if (buffNb & 7)
            {
                const U32 tnb[2] = { 1, 3 };
                buffNb = tnb[buffNb >> 3];
            }
            else
            {
                const U32 tnb[2] = { 0, 4 };
                buffNb = tnb[buffNb >> 3];
            }
        }
        srcBuffer = cNoiseBuffer[buffNb];

        /* Multi - segments compression test */
        XXH64_reset(&crc64, 0);
        nbChunks = (FUZ_rand(&lseed) & 127) + 2;
        sampleSizeLog = FUZ_rand(&lseed) % maxSrcLog;
        maxTestSize = (size_t)1 << sampleSizeLog;
        maxTestSize += FUZ_rand(&lseed) & (maxTestSize-1);
        ZBUFF_compressInit(zc, (FUZ_rand(&lseed) % (20 - (sampleSizeLog/3))) + 1);
        totalTestSize = 0;
        cSize = 0;
        for (n=0; n<nbChunks; n++)
        {
            sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
            readSize = sampleSize;

            /* random size output buffer */
            sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            genSize = MIN (cBufferSize - cSize, sampleSize);

            errorCode = ZBUFF_compressContinue(zc, cBuffer+cSize, &genSize, srcBuffer+sampleStart, &readSize);
            CHECK (ZBUFF_isError(errorCode), "compression error : %s", ZBUFF_getErrorName(errorCode));

            XXH64_update(&crc64, srcBuffer+sampleStart, readSize);
            memcpy(copyBuffer+totalTestSize, srcBuffer+sampleStart, readSize);
            cSize += genSize;
            totalTestSize += readSize;

            if ((FUZ_rand(&lseed) & 15) == 0)
            {
                /* add a few random flushes operations, to mess around */
                sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
                sampleSize = (size_t)1 << sampleSizeLog;
                sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
                genSize = MIN (cBufferSize - cSize, sampleSize);
                errorCode = ZBUFF_compressFlush(zc, cBuffer+cSize, &genSize);
                CHECK (ZBUFF_isError(errorCode), "flush error : %s", ZBUFF_getErrorName(errorCode));
                cSize += genSize;
            }

            if (totalTestSize > maxTestSize) break;
        }
        genSize = cBufferSize - cSize;
        errorCode = ZBUFF_compressEnd(zc, cBuffer+cSize, &genSize);
        CHECK (ZBUFF_isError(errorCode), "compression error : %s", ZBUFF_getErrorName(errorCode));
        CHECK (errorCode != 0, "frame epilogue not fully consumed");
        cSize += genSize;
        crcOrig = XXH64_digest(&crc64);

        /* multi - fragments decompression test */
        ZBUFF_decompressInit(zd);
        totalCSize = 0;
        totalGenSize = 0;
        while (totalCSize < cSize)
        {
            sampleSizeLog  = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize  = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            readSize = sampleSize;
            sampleSizeLog  = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize  = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            genSize = MIN(sampleSize, dstBufferSize - totalGenSize);
            errorCode = ZBUFF_decompressContinue(zd, dstBuffer+totalGenSize, &genSize, cBuffer+totalCSize, &readSize);
            CHECK (ZBUFF_isError(errorCode), "decompression error : %s", ZBUFF_getErrorName(errorCode));
            totalGenSize += genSize;
            totalCSize += readSize;
        }
        CHECK (errorCode != 0, "frame not fully decoded");
        CHECK (totalGenSize != totalTestSize, "decompressed data : wrong size")
        CHECK (totalCSize != cSize, "compressed data should be fully read")
        crcDest = XXH64(dstBuffer, totalTestSize, 0);
        if (crcDest!=crcOrig) findDiff(copyBuffer, dstBuffer, totalTestSize);
        CHECK (crcDest!=crcOrig, "decompressed data corrupted");

        /* noisy/erroneous src decompression test */
        /* add some noise */
        nbChunks = (FUZ_rand(&lseed) & 7) + 2;
        for (n=0; n<nbChunks; n++)
        {
            size_t cStart;

            sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            if (sampleSize > cSize/3) sampleSize = cSize/3;
            sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
            cStart = FUZ_rand(&lseed) % (cSize - sampleSize);

            memcpy(cBuffer+cStart, srcBuffer+sampleStart, sampleSize);
        }

        /* try decompression on noisy data */
        ZBUFF_decompressInit(zd);
        totalCSize = 0;
        totalGenSize = 0;
        while ( (totalCSize < cSize) && (totalGenSize < dstBufferSize) )
        {
            sampleSizeLog  = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize  = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            readSize = sampleSize;
            sampleSizeLog  = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize  = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            genSize = MIN(sampleSize, dstBufferSize - totalGenSize);
            errorCode = ZBUFF_decompressContinue(zd, dstBuffer+totalGenSize, &genSize, cBuffer+totalCSize, &readSize);
            if (ZBUFF_isError(errorCode)) break;   /* error correctly detected */
            totalGenSize += genSize;
            totalCSize += readSize;
        }
    }
Esempio n. 3
0
int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibility)
{
    BYTE* cNoiseBuffer[5];
    BYTE* srcBuffer;
    BYTE* cBuffer;
    BYTE* dstBuffer;
    BYTE* mirrorBuffer;
    size_t srcBufferSize = (size_t)1<<maxSrcLog;
    size_t dstBufferSize = (size_t)1<<maxSampleLog;
    size_t cBufferSize   = ZSTD_compressBound(dstBufferSize);
    U32 result = 0;
    U32 testNb = 0;
    U32 coreSeed = seed, lseed = 0;
    ZSTD_CCtx* refCtx;
    ZSTD_CCtx* ctx;
    ZSTD_DCtx* dctx;
    U32 startTime = FUZ_GetMilliStart();

    /* allocation */
    refCtx = ZSTD_createCCtx();
    ctx = ZSTD_createCCtx();
    dctx= ZSTD_createDCtx();
    cNoiseBuffer[0] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[1] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[2] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[3] = (BYTE*)malloc (srcBufferSize);
    cNoiseBuffer[4] = (BYTE*)malloc (srcBufferSize);
    dstBuffer = (BYTE*)malloc (dstBufferSize);
    mirrorBuffer = (BYTE*)malloc (dstBufferSize);
    cBuffer   = (BYTE*)malloc (cBufferSize);
    CHECK (!cNoiseBuffer[0] || !cNoiseBuffer[1] || !cNoiseBuffer[2] || !cNoiseBuffer[3] || !cNoiseBuffer[4]
           || !dstBuffer || !mirrorBuffer || !cBuffer || !refCtx || !ctx || !dctx,
           "Not enough memory, fuzzer tests cancelled");

    /* Create initial samples */
    RDG_genBuffer(cNoiseBuffer[0], srcBufferSize, 0.00, 0., coreSeed);    /* pure noise */
    RDG_genBuffer(cNoiseBuffer[1], srcBufferSize, 0.05, 0., coreSeed);    /* barely compressible */
    RDG_genBuffer(cNoiseBuffer[2], srcBufferSize, compressibility, 0., coreSeed);
    RDG_genBuffer(cNoiseBuffer[3], srcBufferSize, 0.95, 0., coreSeed);    /* highly compressible */
    RDG_genBuffer(cNoiseBuffer[4], srcBufferSize, 1.00, 0., coreSeed);    /* sparse content */
    srcBuffer = cNoiseBuffer[2];

    /* catch up testNb */
    for (testNb=1; testNb < startTest; testNb++)
        FUZ_rand(&coreSeed);

    /* test loop */
    for ( ; (testNb <= nbTests) || (FUZ_GetMilliSpan(startTime) < g_testTime); testNb++ )
    {
        size_t sampleSize, sampleStart, maxTestSize, totalTestSize;
        size_t cSize, dSize, dSupSize, errorCode, totalCSize, totalGenSize;
        U32 sampleSizeLog, buffNb, cLevelMod, nbChunks, n;
        XXH64_CREATESTATE_STATIC(xxh64);
        U64 crcOrig, crcDest;
        int cLevel;
        BYTE* sampleBuffer;
        const BYTE* dict;
        size_t dictSize;

        /* init */
        if (nbTests >= testNb)
             { DISPLAYUPDATE(2, "\r%6u/%6u    ", testNb, nbTests); }
        else { DISPLAYUPDATE(2, "\r%6u      ", testNb); }

        FUZ_rand(&coreSeed);
        lseed = coreSeed ^ prime1;
        buffNb = FUZ_rand(&lseed) & 127;
        if (buffNb & 7) buffNb=2;
        else
        {
            buffNb >>= 3;
            if (buffNb & 7)
            {
                const U32 tnb[2] = { 1, 3 };
                buffNb = tnb[buffNb >> 3];
            }
            else
            {
                const U32 tnb[2] = { 0, 4 };
                buffNb = tnb[buffNb >> 3];
            }
        }
        srcBuffer = cNoiseBuffer[buffNb];
        sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
        sampleSize = (size_t)1 << sampleSizeLog;
        sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
        sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);

        /* create sample buffer (to catch read error with valgrind & sanitizers)  */
        sampleBuffer = (BYTE*)malloc(sampleSize);
        CHECK (sampleBuffer==NULL, "not enough memory for sample buffer");
        memcpy(sampleBuffer, srcBuffer + sampleStart, sampleSize);
        crcOrig = XXH64(sampleBuffer, sampleSize, 0);

        /* compression test */
        cLevelMod = MAX(1, 38 - (int)(MAX(9, sampleSizeLog) * 2));   /* use high compression levels with small samples, for speed */
        cLevel = (FUZ_rand(&lseed) % cLevelMod) +1;
        cSize = ZSTD_compressCCtx(ctx, cBuffer, cBufferSize, sampleBuffer, sampleSize, cLevel);
        CHECK(ZSTD_isError(cSize), "ZSTD_compressCCtx failed");

        /* compression failure test : too small dest buffer */
        if (cSize > 3)
        {
            const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1;   /* no problem, as cSize > 4 (frameHeaderSizer) */
            const size_t tooSmallSize = cSize - missing;
            static const U32 endMark = 0x4DC2B1A9;
            U32 endCheck;
            memcpy(dstBuffer+tooSmallSize, &endMark, 4);
            errorCode = ZSTD_compressCCtx(ctx, dstBuffer, tooSmallSize, sampleBuffer, sampleSize, cLevel);
            CHECK(!ZSTD_isError(errorCode), "ZSTD_compressCCtx should have failed ! (buffer too small : %u < %u)", (U32)tooSmallSize, (U32)cSize);
            memcpy(&endCheck, dstBuffer+tooSmallSize, 4);
            CHECK(endCheck != endMark, "ZSTD_compressCCtx : dst buffer overflow");
        }

        /* successfull decompression tests*/
        dSupSize = (FUZ_rand(&lseed) & 1) ? 0 : (FUZ_rand(&lseed) & 31) + 1;
        dSize = ZSTD_decompress(dstBuffer, sampleSize + dSupSize, cBuffer, cSize);
        CHECK(dSize != sampleSize, "ZSTD_decompress failed (%s) (srcSize : %u ; cSize : %u)", ZSTD_getErrorName(dSize), (U32)sampleSize, (U32)cSize);
        crcDest = XXH64(dstBuffer, sampleSize, 0);
        CHECK(crcOrig != crcDest, "decompression result corrupted (pos %u / %u)", (U32)findDiff(sampleBuffer, dstBuffer, sampleSize), (U32)sampleSize);

        free(sampleBuffer);   /* no longer useful after this point */

        /* truncated src decompression test */
        {
            const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1;   /* no problem, as cSize > 4 (frameHeaderSizer) */
            const size_t tooSmallSize = cSize - missing;
            void* cBufferTooSmall = malloc(tooSmallSize);   /* valgrind will catch overflows */
            CHECK(cBufferTooSmall == NULL, "not enough memory !");
            memcpy(cBufferTooSmall, cBuffer, tooSmallSize);
            errorCode = ZSTD_decompress(dstBuffer, dstBufferSize, cBufferTooSmall, tooSmallSize);
            CHECK(!ZSTD_isError(errorCode), "ZSTD_decompress should have failed ! (truncated src buffer)");
            free(cBufferTooSmall);
        }

        /* too small dst decompression test */
        if (sampleSize > 3)
        {
            const size_t missing = (FUZ_rand(&lseed) % (sampleSize-2)) + 1;   /* no problem, as cSize > 4 (frameHeaderSizer) */
            const size_t tooSmallSize = sampleSize - missing;
            static const BYTE token = 0xA9;
            dstBuffer[tooSmallSize] = token;
            errorCode = ZSTD_decompress(dstBuffer, tooSmallSize, cBuffer, cSize);
            CHECK(!ZSTD_isError(errorCode), "ZSTD_decompress should have failed : %u > %u (dst buffer too small)", (U32)errorCode, (U32)tooSmallSize);
            CHECK(dstBuffer[tooSmallSize] != token, "ZSTD_decompress : dst buffer overflow");
        }

        /* noisy src decompression test */
        if (cSize > 6)
        {
            const U32 maxNbBits = FUZ_highbit32((U32)(cSize-4));
            size_t pos = 4;   /* preserve magic number (too easy to detect) */
            U32 nbBits = FUZ_rand(&lseed) % maxNbBits;
            size_t mask = (1<<nbBits) - 1;
            size_t skipLength = FUZ_rand(&lseed) & mask;
            pos += skipLength;

            while (pos < cSize)
            {
                /* add noise */
                size_t noiseStart, noiseLength;
                nbBits = FUZ_rand(&lseed) % maxNbBits;
                if (nbBits>0) nbBits--;
                mask = (1<<nbBits) - 1;
                noiseLength = (FUZ_rand(&lseed) & mask) + 1;
                if ( pos+noiseLength > cSize ) noiseLength = cSize-pos;
                noiseStart = FUZ_rand(&lseed) % (srcBufferSize - noiseLength);
                memcpy(cBuffer + pos, srcBuffer + noiseStart, noiseLength);
                pos += noiseLength;

                /* keep some original src */
                nbBits = FUZ_rand(&lseed) % maxNbBits;
                mask = (1<<nbBits) - 1;
                skipLength = FUZ_rand(&lseed) & mask;
                pos += skipLength;
            }

            /* decompress noisy source */
            {
                U32 noiseSrc = FUZ_rand(&lseed) % 5;
                const U32 endMark = 0xA9B1C3D6;
                U32 endCheck;
                srcBuffer = cNoiseBuffer[noiseSrc];
                memcpy(dstBuffer+sampleSize, &endMark, 4);
                errorCode = ZSTD_decompress(dstBuffer, sampleSize, cBuffer, cSize);
                /* result *may* be an unlikely success, but even then, it must strictly respect dest buffer boundaries */
                CHECK((!ZSTD_isError(errorCode)) && (errorCode>sampleSize),
                      "ZSTD_decompress on noisy src : result is too large : %u > %u (dst buffer)", (U32)errorCode, (U32)sampleSize);
                memcpy(&endCheck, dstBuffer+sampleSize, 4);
                CHECK(endMark!=endCheck, "ZSTD_decompress on noisy src : dst buffer overflow");
            }
        }

        /* Streaming compression of scattered segments test */
        XXH64_reset(xxh64, 0);
        nbChunks = (FUZ_rand(&lseed) & 127) + 2;
        sampleSizeLog = FUZ_rand(&lseed) % maxSrcLog;
        maxTestSize = (size_t)1 << sampleSizeLog;
        maxTestSize += FUZ_rand(&lseed) & (maxTestSize-1);
        if (maxTestSize >= dstBufferSize) maxTestSize = dstBufferSize-1;

        sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
        sampleSize = (size_t)1 << sampleSizeLog;
        sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
        sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
        dict = srcBuffer + sampleStart;
        dictSize = sampleSize;

        errorCode = ZSTD_compressBegin(refCtx, (FUZ_rand(&lseed) % (20 - (sampleSizeLog/3))) + 1);
        CHECK (ZSTD_isError(errorCode), "start streaming error : %s", ZSTD_getErrorName(errorCode));
        errorCode = ZSTD_compress_insertDictionary(refCtx, dict, dictSize);
        CHECK (ZSTD_isError(errorCode), "dictionary insertion error : %s", ZSTD_getErrorName(errorCode));
        errorCode = ZSTD_duplicateCCtx(ctx, refCtx);
        CHECK (ZSTD_isError(errorCode), "context duplication error : %s", ZSTD_getErrorName(errorCode));
        totalTestSize = 0; cSize = 0;
        for (n=0; n<nbChunks; n++)
        {
            sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
            sampleSize = (size_t)1 << sampleSizeLog;
            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
            sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);

            if (cBufferSize-cSize < ZSTD_compressBound(sampleSize))
                /* avoid invalid dstBufferTooSmall */
                break;
            if (totalTestSize+sampleSize > maxTestSize) break;

            errorCode = ZSTD_compressContinue(ctx, cBuffer+cSize, cBufferSize-cSize, srcBuffer+sampleStart, sampleSize);
            CHECK (ZSTD_isError(errorCode), "multi-segments compression error : %s", ZSTD_getErrorName(errorCode));
            cSize += errorCode;

            XXH64_update(xxh64, srcBuffer+sampleStart, sampleSize);
            memcpy(mirrorBuffer + totalTestSize, srcBuffer+sampleStart, sampleSize);
            totalTestSize += sampleSize;
        }
        errorCode = ZSTD_compressEnd(ctx, cBuffer+cSize, cBufferSize-cSize);
        CHECK (ZSTD_isError(errorCode), "multi-segments epilogue error : %s", ZSTD_getErrorName(errorCode));
        cSize += errorCode;
        crcOrig = XXH64_digest(xxh64);

        /* streaming decompression test */
        errorCode = ZSTD_resetDCtx(dctx);
        CHECK (ZSTD_isError(errorCode), "cannot init DCtx : %s", ZSTD_getErrorName(errorCode));
        ZSTD_decompress_insertDictionary(dctx, dict, dictSize);
        totalCSize = 0;
        totalGenSize = 0;
        while (totalCSize < cSize)
        {
            size_t inSize = ZSTD_nextSrcSizeToDecompress(dctx);
            size_t genSize = ZSTD_decompressContinue(dctx, dstBuffer+totalGenSize, dstBufferSize-totalGenSize, cBuffer+totalCSize, inSize);
            CHECK (ZSTD_isError(genSize), "streaming decompression error : %s", ZSTD_getErrorName(genSize));
            totalGenSize += genSize;
            totalCSize += inSize;
        }
        CHECK (ZSTD_nextSrcSizeToDecompress(dctx) != 0, "frame not fully decoded");
        CHECK (totalGenSize != totalTestSize, "decompressed data : wrong size")
        CHECK (totalCSize != cSize, "compressed data should be fully read")
        crcDest = XXH64(dstBuffer, totalTestSize, 0);
        if (crcDest!=crcOrig)
            errorCode = findDiff(mirrorBuffer, dstBuffer, totalTestSize);
        CHECK (crcDest!=crcOrig, "streaming decompressed data corrupted : byte %u / %u  (%02X!=%02X)",
               (U32)errorCode, (U32)totalTestSize, dstBuffer[errorCode], mirrorBuffer[errorCode]);

    }
Esempio n. 4
0
int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibility)
{
    BYTE* srcBuffer;
    BYTE* cBuffer;
    BYTE* dstBuffer;
    size_t srcBufferSize = (size_t)1<<maxSrcLog;
    size_t dstBufferSize = (size_t)1<<maxSampleLog;
    size_t cBufferSize   = ZSTD_compressBound(dstBufferSize);
    U32 result = 0;
    U32 testNb = 0;
    U32 coreSeed = seed, lseed = 0;
    (void)startTest; (void)compressibility;

    /* allocation */
    srcBuffer = malloc (srcBufferSize);
    dstBuffer = malloc (dstBufferSize);
    cBuffer   = malloc (cBufferSize);
    CHECK (!srcBuffer || !dstBuffer || !cBuffer, "Not enough memory, fuzzer tests cancelled");

    /* Create initial sample */
    FUZ_generateSynthetic(srcBuffer, srcBufferSize, 0.50, &coreSeed);

    /* catch up testNb */
    for (testNb=0; testNb < startTest; testNb++)
        FUZ_rand(&coreSeed);

    /* test loop */
    for (testNb=startTest; testNb < nbTests; testNb++)
    {
        size_t sampleSize, sampleStart;
        size_t cSize, dSize, dSupSize;
        U32 sampleSizeLog;
        U64 crcOrig, crcDest;

        /* init */
        DISPLAYUPDATE(2, "\r%6u/%6u   ", testNb, nbTests);
        FUZ_rand(&coreSeed);
        lseed = coreSeed ^ prime1;
        sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
        sampleSize = (size_t)1<<sampleSizeLog;
        sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
        sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
        crcOrig = XXH64(srcBuffer + sampleStart, sampleSize, 0);

        /* compression tests*/
        cSize = ZSTD_compress(cBuffer, cBufferSize, srcBuffer + sampleStart, sampleSize);
        CHECK(ZSTD_isError(cSize), "ZSTD_compress failed");

        /* decompression tests*/
        dSupSize = (FUZ_rand(&lseed) & 1) ? 0 : (FUZ_rand(&lseed) & 31) + 1;
        dSize = ZSTD_decompress(dstBuffer, sampleSize + dSupSize, cBuffer, cSize);
        CHECK(dSize != sampleSize, "ZSTD_decompress failed (%s)", ZSTD_getErrorName(dSize));
        crcDest = XXH64(dstBuffer, sampleSize, 0);
        CHECK(crcOrig != crcDest, "dstBuffer corrupted (pos %u / %u)", (U32)findDiff(srcBuffer+sampleStart, dstBuffer, sampleSize), (U32)sampleSize);
    }
    DISPLAY("\rAll fuzzer tests completed   \n");

_cleanup:
    free(srcBuffer);
    free(cBuffer);
    free(dstBuffer);
    return result;

_output_error:
    result = 1;
    goto _cleanup;
}