コード例 #1
0
ファイル: libzstd.c プロジェクト: cher-nov/UniPack
size_t up_pack_step( void* outbuf_ptr, size_t outbuf_size, size_t* data_left ) {

  size_t result, done_size, read_size, chunk_left;
  done_size = outbuf_size;

  if (lib_pack_left_sz > 0) {
    read_size = lib_pack_chunk_sz;
    result = ZBUFF_compressContinue( lib_pack_ctx,
      outbuf_ptr, &done_size, lib_pack_chunk, &read_size );
  } else {
    if (lib_pack_flush_sz == 0) {
      result = ZBUFF_compressEnd( lib_pack_ctx, outbuf_ptr, &done_size );
    } else {
      result = ZBUFF_compressFlush( lib_pack_ctx, outbuf_ptr, &done_size );
    }
  }

  if ( !ZBUFF_isError( result ) ) {
    if (lib_pack_left_sz > 0) {
      lib_pack_chunk += read_size;
      lib_pack_chunk_sz -= read_size;
      lib_pack_left_sz -= read_size;
      chunk_left = lib_pack_chunk_sz;
    } else {
      lib_pack_data_end = true;
      lib_pack_flush_sz = result;
      chunk_left = 0;
    }
    if (data_left != NULL) { *data_left = chunk_left; }
  } else {
    lib_error = result;
  }

  return done_size;
}
コード例 #2
0
ファイル: zbufftest.c プロジェクト: peterh/zstd
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;
        }
    }
コード例 #3
0
ファイル: zbufftest.c プロジェクト: peterh/zstd
static int basicUnitTests(U32 seed, double compressibility)
{
    int testResult = 0;
    void* CNBuffer;
    size_t CNBufferSize = COMPRESSIBLE_NOISE_LENGTH;
    void* compressedBuffer;
    size_t compressedBufferSize = ZSTD_compressBound(COMPRESSIBLE_NOISE_LENGTH);
    void* decodedBuffer;
    size_t decodedBufferSize = CNBufferSize;
    U32 randState = seed;
    size_t result, cSize, readSize, genSize;
    U32 testNb=0;
    ZBUFF_CCtx* zc = ZBUFF_createCCtx();
    ZBUFF_DCtx* zd = ZBUFF_createDCtx();

    /* Create compressible test buffer */
    CNBuffer = malloc(CNBufferSize);
    compressedBuffer = malloc(compressedBufferSize);
    decodedBuffer = malloc(decodedBufferSize);
    if (!CNBuffer || !compressedBuffer || !decodedBuffer || !zc || !zd)
    {
        DISPLAY("Not enough memory, aborting\n");
        goto _output_error;
    }
    RDG_genBuffer(CNBuffer, CNBufferSize, compressibility, 0., randState);

    /* Basic compression test */
    DISPLAYLEVEL(4, "test%3i : compress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
    ZBUFF_compressInit(zc, 1);
    readSize = CNBufferSize;
    genSize = compressedBufferSize;
    result = ZBUFF_compressContinue(zc, compressedBuffer, &genSize, CNBuffer, &readSize);
    if (ZBUFF_isError(result)) goto _output_error;
    if (readSize != CNBufferSize) goto _output_error;   /* entire input should be consumed */
    cSize = genSize;
    genSize = compressedBufferSize - cSize;
    result = ZBUFF_compressEnd(zc, ((char*)compressedBuffer)+cSize, &genSize);
    if (result != 0) goto _output_error;   /* error, or some data not flushed */
    cSize += genSize;
    DISPLAYLEVEL(4, "OK (%u bytes : %.2f%%)\n", (U32)cSize, (double)cSize/COMPRESSIBLE_NOISE_LENGTH*100);

    /* Basic decompression test */
    DISPLAYLEVEL(4, "test%3i : decompress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
    ZBUFF_decompressInit(zd);
    readSize = cSize;
    genSize = CNBufferSize;
    result = ZBUFF_decompressContinue(zd, decodedBuffer, &genSize, compressedBuffer, &readSize);
    if (result != 0) goto _output_error;  /* should reach end of frame == 0; otherwise, some data left, or an error */
    if (genSize != CNBufferSize) goto _output_error;   /* should regenerate the same amount */
    if (readSize != cSize) goto _output_error;   /* should have read the entire frame */
    DISPLAYLEVEL(4, "OK \n");

    /* check regenerated data is byte exact */
    {
        size_t i;
        DISPLAYLEVEL(4, "test%3i : check decompressed result : ", testNb++);
        for (i=0; i<CNBufferSize; i++)
        {
            if (((BYTE*)decodedBuffer)[i] != ((BYTE*)CNBuffer)[i]) goto _output_error;;
        }
        DISPLAYLEVEL(4, "OK \n");
    }

_end:
    ZBUFF_freeCCtx(zc);
    ZBUFF_freeDCtx(zd);
    free(CNBuffer);
    free(compressedBuffer);
    free(decodedBuffer);
    return testResult;

_output_error:
    testResult = 1;
    DISPLAY("Error detected in Unit tests ! \n");
    goto _end;
}