int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressibility, U32 duration)
{
unsigned testResult = 0;
unsigned testNb = 0;
void* srcBuffer = NULL;
void* compressedBuffer = NULL;
void* decodedBuffer = NULL;
U32 coreRand = seed;
LZ4F_decompressionContext_t dCtx = NULL;
LZ4F_compressionContext_t cCtx = NULL;
size_t result;
const U32 startTime = FUZ_GetMilliStart();
XXH64_state_t xxh64;
# define CHECK(cond, ...) if (cond) { DISPLAY("Error => "); DISPLAY(__VA_ARGS__); \
DISPLAY(" (seed %u, test nb %u) \n", seed, testNb); goto _output_error; }
// backup all allocated addresses, from which we will later select buffers
const size_t max_buf_size = 131 KB;
size_t num_buf_size_distribution_deviations = 0;
LZ4SG_in_t sg_in_buf_potential [2*MAX_SG_BUFFERS];
LZ4SG_out_t sg_out_buf_potential[2*MAX_SG_BUFFERS];
LZ4SG_in_t sg_cin [MAX_SG_BUFFERS];
LZ4SG_out_t sg_cout[MAX_SG_BUFFERS];
LZ4SG_in_t sg_din [MAX_SG_BUFFERS];
LZ4SG_out_t sg_dout[MAX_SG_BUFFERS];
size_t sg_cin_len, sg_cout_len, sg_din_len, sg_dout_len;
const size_t maxDstSize = LZ4_SG_compressBound(srcDataLength, NELEMS(sg_cin), NELEMS(sg_cout));
unsigned int i;
for (i = 0; i < NELEMS(sg_in_buf_potential); i++) {
sg_in_buf_potential [i].sg_base = malloc(max_buf_size);
sg_in_buf_potential [i].sg_len = max_buf_size;
sg_out_buf_potential[i].sg_base = malloc(max_buf_size);
sg_out_buf_potential[i].sg_len = max_buf_size;
}
/* Init */
duration *= 1000;
/* Create buffers */
result = LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION);
CHECK(LZ4F_isError(result), "Allocation failed (error %i)", (int)result);
result = LZ4F_createCompressionContext(&cCtx, LZ4F_VERSION);
CHECK(LZ4F_isError(result), "Allocation failed (error %i)", (int)result);
srcBuffer = malloc(srcDataLength);
CHECK(srcBuffer==NULL, "srcBuffer Allocation failed");
const size_t compressedBufferLength = maxDstSize;
compressedBuffer = malloc(compressedBufferLength);
CHECK(compressedBuffer==NULL, "compressedBuffer Allocation failed");
decodedBuffer = calloc(1, srcDataLength); /* calloc avoids decodedBuffer being considered "garbage" by scan-build */
CHECK(decodedBuffer==NULL, "decodedBuffer Allocation failed");
FUZ_fillCompressibleNoiseBuffer(srcBuffer, srcDataLength, compressibility, &coreRand);
/* jump to requested testNb */
for (testNb =0; (testNb < startTest); testNb++) (void)FUZ_rand(&coreRand); // sync randomizer
/* main fuzzer test loop */
for ( ; (testNb < nbTests) || (duration > FUZ_GetMilliSpan(startTime)) ; testNb++)
{
U32 randState = coreRand ^ prime1;
(void)FUZ_rand(&coreRand); /* update seed */
srand48(FUZ_rand(&randState));
DISPLAYUPDATE(2, "\r%5u ", testNb);
const size_t max_src_buf_size = (4 MB > srcDataLength) ? srcDataLength : 4 MB;
unsigned nbBits = (FUZ_rand(&randState) % (FUZ_highbit(max_src_buf_size-1) - 1)) + 1;
const size_t min_src_size = 20;
const size_t min_first_dest_buf_size = 21;
const size_t min_src_buf_size = 1;
const size_t min_dst_buf_size = 10;
size_t srcSize = (FUZ_rand(&randState) & ((1<<nbBits)-1)) + min_src_size;
size_t srcStart = FUZ_rand(&randState) % (srcDataLength - srcSize);
size_t cSize;
size_t dstSize;
size_t dstSizeBound;
U64 crcOrig, crcDecoded;
unsigned int test_selection = FUZ_rand(&randState);
//TODO: enable lz4f_compress_compatibility_test with LZ4_SG_decompress
int lz4f_compress_compatibility_test = 0;//(test_selection % 4) == 0;
if (!lz4f_compress_compatibility_test)
{
// SGL compress
unsigned int buffer_selection = FUZ_rand(&randState);
if ((buffer_selection & 0xF) == 1)
{
// SG compress single source and single target buffers
sg_cin[0].sg_base = (BYTE*)srcBuffer+srcStart;
sg_cin[0].sg_len = srcSize;
sg_cin_len = 1;
sg_cout[0].sg_base = compressedBuffer;
sg_cout[0].sg_len = compressedBufferLength;
sg_cout_len = 1;
dstSizeBound = dstSize = compressedBufferLength;
}
else
{
// SG compress random number and size source and target buffers
sg_cin_len = 1 + (FUZ_rand(&randState) % MAX_SG_BUFFERS);
sg_cout_len = 1 + (FUZ_rand(&randState) % MAX_SG_BUFFERS);
// single source buffer
if (1 == sg_cin_len) {
sg_cin[0].sg_base = (BYTE*)srcBuffer+srcStart;
sg_cin[0].sg_len = srcSize;
DISPLAYUPDATE(4, "INFO: single source buf size %i\n", (int)srcSize);
}
else {
// multiple source buffers
if (srcSize > sg_cin_len*max_buf_size/2) {
srcSize = sg_cin_len*max_buf_size/2;
num_buf_size_distribution_deviations++;
DISPLAYUPDATE(4, "NOTE: source buffer total size deviation %i\n", (int)num_buf_size_distribution_deviations);
}
size_t exact_src_size = 0;
unsigned int buf_size_mean = srcSize / sg_cin_len;
for (i = 0; i < sg_cin_len; i++) {
size_t buf_size = rnd_exponential(buf_size_mean, min_src_buf_size, max_buf_size);
DISPLAYUPDATE(4, "INFO: source buf %i size %i\n", i, (int)buf_size);
if (srcStart+exact_src_size+buf_size > srcDataLength) {
buf_size = srcDataLength-(srcStart+exact_src_size);
}
sg_cin[i].sg_base = sg_in_buf_potential[i*2+1].sg_base;
sg_cin[i].sg_len = buf_size;
memcpy((void *)sg_cin[i].sg_base, (BYTE*)srcBuffer+srcStart+exact_src_size, buf_size);
exact_src_size += buf_size;
if (srcStart+exact_src_size == srcDataLength) {
num_buf_size_distribution_deviations++;
sg_cin_len = i+1;
DISPLAYUPDATE(4, "NOTE: final source buffer size deviation %i (buffers number limited to %i)\n", (int)num_buf_size_distribution_deviations, (int)sg_cin_len);
}
}
srcSize = exact_src_size;
}
// we can now derive the required limit for output
dstSizeBound = LZ4_SG_compressBound(srcSize, sg_cin_len, sg_cout_len);
// single target buffer
if (1 == sg_cout_len) {
sg_cout[0].sg_base = compressedBuffer;
sg_cout[0].sg_len = compressedBufferLength;
}
else {
// multiple target buffers
int finalBufferTruncated = 0;
dstSize = 0;
unsigned int buf_size_mean = dstSizeBound / sg_cout_len;
for (i = 0; i < sg_cout_len; i++) {
const size_t min_buf_size = (i == 0) ? min_first_dest_buf_size : min_dst_buf_size;
size_t buf_size = rnd_exponential(buf_size_mean, min_buf_size, max_buf_size);
DISPLAYUPDATE(4, "INFO: target buf %i size %i\n", (int)i, (int)buf_size);
if (dstSize+buf_size > dstSizeBound) {
buf_size = dstSizeBound-dstSize;
finalBufferTruncated = 1;
}
dstSize += buf_size;
sg_cout[i].sg_base = sg_out_buf_potential[i*2+1].sg_base;
sg_cout[i].sg_len = buf_size;
if (finalBufferTruncated) {
num_buf_size_distribution_deviations++;
if (buf_size < min_buf_size) {
// merge truncated with previous?
if (i > 0) {
sg_cout[i-1].sg_len += buf_size;
if (sg_cout[i-1].sg_len > max_buf_size) {
// skip, too much hassle
DISPLAYUPDATE(4, "NOTE: unable to truncate final target buffer size (deviations %i), skipping\n", (int)num_buf_size_distribution_deviations);
sg_cout_len = 0; break;
}
}
else {
// can this happen?
DISPLAYUPDATE(4, "NOTE: unable to truncate first and final target buffer size (deviations %i), skipping\n", (int)num_buf_size_distribution_deviations);
sg_cout_len = 0; break;
}
sg_cout_len = i;
}
else {
sg_cout_len = i+1;
}
DISPLAYUPDATE(4, "NOTE: final target buffer size truncated (%i), buffers number limited to %i, final's size is now %i (deviations %i)\n",
(int)buf_size, (int)sg_cout_len, (int)sg_cout[sg_cout_len-1].sg_len, (int)num_buf_size_distribution_deviations);
}
}
// skip/abort condition
if (0 == sg_cout_len) continue;
}
if ((buffer_selection & 0xF) == 0) {
//TODO: select a random input and output buffer and split it in two,
// feeding consecutive addresses as consecutive entries in SGL
}
}
crcOrig = XXH64((BYTE*)srcBuffer+srcStart, srcSize, 1);
size_t sourceSizeOut = srcSize;
result = LZ4_SG_compress(&sg_cin[0], sg_cin_len, &sg_cout[0], sg_cout_len, &sourceSizeOut, maxDstSize, DEFAULT_ACCEL);
if (((result == 0) || (sourceSizeOut != srcSize)) && (dstSize < dstSizeBound)) {
// forgive compression failure when output total size is lower than bound
num_buf_size_distribution_deviations++;
DISPLAYUPDATE(4, "NOTE: dstSize %i < %i dstSizeBound, compression attempt failed, not totally unexpected (deviations %i), skipping\n",
(int)dstSize, (int)dstSizeBound, (int)num_buf_size_distribution_deviations);
continue;
}
CHECK(result <= 0, "Compression failed (error %i)", (int)result);
CHECK(sourceSizeOut != srcSize, "Compression stopped at %i out of %i", (int)sourceSizeOut, (int)srcSize);
cSize = result;
}
else
{
// LZ4F compression - use it in order to verify SGL decompress compatibility with it
DISPLAYUPDATE(4, "INFO: LZ4F compression\n");
// alternative
// size_t dstMaxSize = LZ4F_compressFrameBound(srcSize, prefsPtr);
// DISPLAYLEVEL(3, "compressFrame srcSize %zu dstMaxSize %zu\n",
// srcSize, dstMaxSize);
// cSize = LZ4F_compressFrame(compressedBuffer, dstMaxSize, (char*)srcBuffer + srcStart, srcSize, prefsPtr);
// CHECK(LZ4F_isError(cSize), "LZ4F_compressFrame failed : error %i (%s)", (int)cSize, LZ4F_getErrorName(cSize));
crcOrig = XXH64((BYTE*)srcBuffer+srcStart, srcSize, 1);
unsigned BSId = 4 + (FUZ_rand(&randState) & 3);
unsigned BMId = FUZ_rand(&randState) & 1;
unsigned CCflag = FUZ_rand(&randState) & 1;
unsigned autoflush = (FUZ_rand(&randState) & 7) == 2;
U64 frameContentSize = ((FUZ_rand(&randState) & 0xF) == 1) ? srcSize : 0;
LZ4F_preferences_t prefs;
LZ4F_compressOptions_t cOptions;
LZ4F_preferences_t* prefsPtr = &prefs;
memset(&prefs, 0, sizeof(prefs));
memset(&cOptions, 0, sizeof(cOptions));
prefs.frameInfo.blockMode = (LZ4F_blockMode_t)BMId;
prefs.frameInfo.blockSizeID = (LZ4F_blockSizeID_t)BSId;
prefs.frameInfo.contentChecksumFlag = (LZ4F_contentChecksum_t)CCflag;
prefs.frameInfo.contentSize = frameContentSize;
prefs.autoFlush = autoflush;
prefs.compressionLevel = FUZ_rand(&randState) % 5;
if ((FUZ_rand(&randState) & 0xF) == 1) prefsPtr = NULL;
const BYTE* ip = (const BYTE*)srcBuffer + srcStart;
const BYTE* const iend = ip + srcSize;
BYTE* op = (BYTE*)compressedBuffer;
BYTE* const oend = op + LZ4F_compressFrameBound(srcDataLength, NULL);
unsigned maxBits = FUZ_highbit((U32)srcSize);
result = LZ4F_compressBegin(cCtx, op, oend-op, prefsPtr);
CHECK(LZ4F_isError(result), "Compression header failed (error %i)", (int)result);
op += result;
while (ip < iend)
{
unsigned nbBitsSeg = FUZ_rand(&randState) % maxBits;
size_t iSize = (FUZ_rand(&randState) & ((1<<nbBitsSeg)-1)) + 1;
size_t oSize = LZ4F_compressBound(iSize, prefsPtr);
unsigned forceFlush = ((FUZ_rand(&randState) & 3) == 1);
if (iSize > (size_t)(iend-ip)) iSize = iend-ip;
cOptions.stableSrc = ((FUZ_rand(&randState) & 3) == 1);
DISPLAYLEVEL(3, "compressUpdate ip %d iSize %zu oSize %zu forceFlush %d\n",
(int)(ip-((const BYTE*)srcBuffer + srcStart)), iSize, oSize, forceFlush);
result = LZ4F_compressUpdate(cCtx, op, oSize, ip, iSize, &cOptions);
CHECK(LZ4F_isError(result), "Compression failed (error %i)", (int)result);
op += result;
ip += iSize;
if (forceFlush)
{
result = LZ4F_flush(cCtx, op, oend-op, &cOptions);
CHECK(LZ4F_isError(result), "Compression failed (error %i)", (int)result);
op += result;
}
}
result = LZ4F_compressEnd(cCtx, op, oend-op, &cOptions);
CHECK(LZ4F_isError(result), "Compression completion failed (error %i)", (int)result);
op += result;
cSize = op-(BYTE*)compressedBuffer;
}
//DECOMPRESS
test_selection = FUZ_rand(&randState);
if (lz4f_compress_compatibility_test || ((test_selection % 2) == 0))
{
//TODO: SGL decompress with random buffer sizes
// SGL decompress with same buffer sizes used for compression
// prepare din with cout's data
sg_din_len = sg_cout_len;
for (i = 0; i < sg_din_len; i++) {
sg_din[i].sg_len = sg_cout[i].sg_len;
if (sg_cout[i].sg_len <= max_buf_size) {
// enough room to copy - do it
sg_din[i].sg_base = sg_in_buf_potential[i*2+0].sg_base;
if (sg_din[i].sg_base != sg_cout[i].sg_base) {
memcpy((void *)sg_din[i].sg_base, sg_cout[i].sg_base, sg_cout[i].sg_len);
}
}
else {
// this is probably single output buffer - skip copy, use directly
sg_din[i].sg_base = sg_cout[i].sg_base;
}
}
// prepare dout to receive decompressed data
sg_dout_len = sg_cin_len;
for (i = 0; i < sg_dout_len; i++) {
sg_dout[i].sg_len = sg_cin[i].sg_len;
if (sg_cin[i].sg_len <= max_buf_size) {
// enough room to decompress into independent buffer
sg_dout[i].sg_base = sg_out_buf_potential[i*2+0].sg_base;
}
else {
// this is probably single input buffer, use an external output buffer
sg_dout[i].sg_base = decodedBuffer;
}
}
size_t sourceSizeOut = cSize;
size_t maxOutputSize = srcSize;
int decomp_result = LZ4_SG_decompress(&sg_din[0], sg_din_len, &sg_dout[0], sg_dout_len, &sourceSizeOut, maxOutputSize);
CHECK(decomp_result <= 0, "SG decompression failed (error %i)", (int)decomp_result);
CHECK(decomp_result != (int)srcSize, "SG decompression stopped at %i", (int)decomp_result);
// verify result checksum
size_t total_checked = 0;
XXH64_reset(&xxh64, 1);
for (i = 0; (i < sg_dout_len) && ((int)total_checked < decomp_result); i++) {
size_t cur_size = sg_dout[i].sg_len;
size_t rem = decomp_result - total_checked;
if (rem < cur_size) cur_size = rem;
total_checked += cur_size;
XXH64_update(&xxh64, sg_dout[i].sg_base, cur_size);
}
crcDecoded = XXH64_digest(&xxh64);
if (crcDecoded != crcOrig) {
DISPLAYLEVEL(1, "checked %i out of %i (crcDecoded %08x, crcOrig %08x)\n",
(int)total_checked, decomp_result, (unsigned)crcDecoded, (unsigned)crcOrig);
// locate error if any
total_checked = 0;
for (i = 0; (i < sg_dout_len) && ((int)total_checked < decomp_result); i++) {
size_t cur_size = sg_dout[i].sg_len;
size_t rem = decomp_result - total_checked;
if (rem < cur_size) cur_size = rem;
total_checked += cur_size;
U64 crc_in = XXH64(sg_cin [i].sg_base, cur_size, 1);
U64 crc_out = XXH64(sg_dout[i].sg_base, cur_size, 1);
if (crc_in != crc_out) {
locateBuffDiff(sg_cin[i].sg_base, sg_dout[i].sg_base, cur_size);
break;
}
}
DISPLAYLEVEL(1, "checked %i out of %i\n",
(int)total_checked, decomp_result);
}
CHECK(crcDecoded != crcOrig, "Decompression corruption");
}
else
{
// prepare compressedBuffer from SGL
size_t total_copied = 0;
for (i = 0; i < sg_cout_len; i++) {
size_t buf_size_bytes = cSize - total_copied;
if (buf_size_bytes == 0) break;
if (buf_size_bytes > sg_cout[i].sg_len) buf_size_bytes = sg_cout[i].sg_len;
if (((char *)compressedBuffer)+total_copied != sg_cout[i].sg_base) {
memcpy(((char *)compressedBuffer)+total_copied, sg_cout[i].sg_base, buf_size_bytes);
}
total_copied += buf_size_bytes;
}
LZ4F_decompressOptions_t dOptions;
memset(&dOptions, 0, sizeof(dOptions));
const BYTE* ip = (const BYTE*)compressedBuffer;
const BYTE* const iend = ip + cSize;
BYTE* op = (BYTE*)decodedBuffer;
BYTE* const oend = op + srcDataLength;
size_t totalOut = 0;
unsigned maxBits = FUZ_highbit((U32)cSize);
XXH64_reset(&xxh64, 1);
if (maxBits < 3) maxBits = 3;
while (ip < iend)
{
unsigned nbBitsI = (FUZ_rand(&randState) % (maxBits-1)) + 1;
unsigned nbBitsO = (FUZ_rand(&randState) % (maxBits)) + 1;
size_t iSize = (FUZ_rand(&randState) & ((1<<nbBitsI)-1)) + 1;
size_t oSize = (FUZ_rand(&randState) & ((1<<nbBitsO)-1)) + 2;
if (iSize > (size_t)(iend-ip)) iSize = iend-ip;
if (oSize > (size_t)(oend-op)) oSize = oend-op;
dOptions.stableDst = FUZ_rand(&randState) & 1;
result = LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, &dOptions);
if (result == (size_t)-LZ4F_ERROR_contentChecksum_invalid)
locateBuffDiff((BYTE*)srcBuffer+srcStart, decodedBuffer, srcSize);
CHECK(LZ4F_isError(result), "Decompression failed (error %i:%s ip %d)",
(int)result, LZ4F_getErrorName((LZ4F_errorCode_t)result), (int)(ip-(const BYTE*)compressedBuffer));
XXH64_update(&xxh64, op, (U32)oSize);
totalOut += oSize;
op += oSize;
ip += iSize;
}
CHECK(result != 0, "Frame decompression failed (error %i)", (int)result);
if (totalOut) /* otherwise, it's a skippable frame */
{
crcDecoded = XXH64_digest(&xxh64);
if (crcDecoded != crcOrig) locateBuffDiff((BYTE*)srcBuffer+srcStart, decodedBuffer, srcSize);
CHECK(crcDecoded != crcOrig, "Decompression corruption");
}
}
}
DISPLAYLEVEL(2, "\rAll tests completed \n");
_end:
LZ4F_freeDecompressionContext(dCtx);
LZ4F_freeCompressionContext(cCtx);
free(srcBuffer);
free(compressedBuffer);
free(decodedBuffer);
for (i = 0; i < NELEMS(sg_in_buf_potential); i++) {
free((void *)(sg_in_buf_potential [i].sg_base));
free( sg_out_buf_potential[i].sg_base);
}
if (num_buf_size_distribution_deviations > 0) {
DISPLAYLEVEL(2, "NOTE: %i buffer size deviations \n", (int)num_buf_size_distribution_deviations);
}
if (pause)
{
DISPLAY("press enter to finish \n");
(void)getchar();
}
return testResult;
_output_error:
testResult = 1;
goto _end;
// unreachable
return -1;
#undef CHECK
}
void Message::uncompress() {
if (!isCompressed())
return;
std::string errorStr = "Unsupported compression";
size_t actualSize;
std::string comprType;
std::string comprIdent = _meta["um.compressed"];
size_t colon = comprIdent.find_first_of(':');
if (colon == std::string::npos) {
errorStr = "No colon found in um.compressed meta field";
goto DECOMPRESS_ERROR;
}
actualSize = strTo<size_t>(comprIdent.substr(0, colon));
comprType = comprIdent.substr(colon + 1);
_meta["um.compressRatio"] = toStr((double)_size / (double)actualSize);
// std::cout << _size << " vs " << actualSize << std::endl;
if (false) {}
#ifdef BUILD_WITH_COMPRESSION_MINIZ
else if (comprType == "miniz") {
int cmp_status;
uint8_t *pUncmp;
pUncmp = (mz_uint8 *)malloc((size_t)actualSize);
cmp_status = mz_uncompress(pUncmp, (mz_ulong*)&actualSize, (const unsigned char *)_data.get(), _size);
if (cmp_status != MZ_OK) {
errorStr = mz_error(cmp_status);
goto DECOMPRESS_ERROR;
}
_size = actualSize;
_data = SharedPtr<char>((char*)pUncmp);
_meta.erase("um.compressed");
return;
}
#endif
#ifdef BUILD_WITH_COMPRESSION_FASTLZ
else if (comprType == "fastlz") {
void* uncompressed = malloc((size_t)actualSize);
// returns the size of the decompressed block.
actualSize = fastlz_decompress(_data.get(), _size, uncompressed, actualSize);
// If error occurs, e.g. the compressed data is corrupted or the output buffer is not large enough, then 0
if (actualSize == 0) {
errorStr = "fastlz_decompress returned 0";
goto DECOMPRESS_ERROR;
}
_size = actualSize;
_data = SharedPtr<char>((char*)uncompressed);
_meta.erase("um.compressed");
return;
}
#endif
#ifdef BUILD_WITH_COMPRESSION_LZ4
else if (comprType == "lz4") {
#ifdef LZ4_FRAME
LZ4F_errorCode_t n;
LZ4F_decompressionContext_t ctx;
void* uncompressed = malloc((size_t)actualSize);
n = LZ4F_createDecompressionContext(&ctx, LZ4F_VERSION);
if (LZ4F_isError(n)) {
errorStr = LZ4F_getErrorName(n);
goto DECOMPRESS_ERROR;
}
n = LZ4F_decompress(ctx, uncompressed, &actualSize, _data.get(), &_size, NULL);
if (LZ4F_isError(n)) {
errorStr = LZ4F_getErrorName(n);
goto DECOMPRESS_ERROR;
}
_size = actualSize;
_data = SharedPtr<char>((char*)uncompressed);
_meta.erase("um.compressed");
LZ4F_freeDecompressionContext(ctx);
#else
char* uncompressed = (char*)malloc((size_t)actualSize);
int n = LZ4_decompress_fast(_data.get(), uncompressed, actualSize);
if (n < 0) {
errorStr = "Decompression failed";
goto DECOMPRESS_ERROR;
}
_size = actualSize;
_data = SharedPtr<char>((char*)uncompressed);
_meta.erase("um.compressed");
#endif
return;
}
#endif
DECOMPRESS_ERROR:
UM_LOG_WARN("Could not decompress message: %s", errorStr.c_str());
}
static int verify_basic_LZ4F_decompression(const void* compressedBuffer, int cSize, U64 crcOrig, void* decodedBuffer, const size_t decodedBufferSize)
{
DISPLAYLEVEL(3, "%s (cSize %i, crcOrig %08x, decodedBufferSize %i)\n", __FUNCTION__, cSize, (unsigned int)crcOrig, (int)decodedBufferSize);
LZ4F_decompressionContext_t dCtx = NULL;
U64 crcDest;
size_t compressedBufferSize = cSize;
BYTE* op = (BYTE*) decodedBuffer;
BYTE* const oend = (BYTE*) decodedBuffer + decodedBufferSize;
const BYTE* ip = (const BYTE*) compressedBuffer;
const BYTE* const iend = (const BYTE*) compressedBuffer + cSize;
LZ4F_errorCode_t errorCode = LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
memset(decodedBuffer, 0, decodedBufferSize);
DISPLAYLEVEL(3, "Single Block : \n");
size_t destSize = decodedBufferSize;
errorCode = LZ4F_decompress(dCtx, decodedBuffer, &destSize, compressedBuffer, &compressedBufferSize, NULL);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
crcDest = XXH64(decodedBuffer, decodedBufferSize, 1);
DISPLAYLEVEL(3, "Regenerated %i bytes (%08x)\n", (int )decodedBufferSize, (unsigned int)crcDest);
UT_VERIFY(crcDest == crcOrig, return __LINE__);
memset(decodedBuffer, 0, decodedBufferSize);
DISPLAYLEVEL(4, "Reusing decompression context \n");
{
size_t iSize = compressedBufferSize - 4;
const BYTE* cBuff = (const BYTE*) compressedBuffer;
DISPLAYLEVEL(3, "Missing last 4 bytes : ");
destSize = decodedBufferSize;
errorCode = LZ4F_decompress(dCtx, decodedBuffer, &destSize, cBuff, &iSize, NULL);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
UT_VERIFY(errorCode, return __LINE__);
crcDest = XXH64(decodedBuffer, destSize, 1);
DISPLAYLEVEL(3, "crcDest (%08x)\n", (unsigned int)crcDest);
DISPLAYLEVEL(3, "indeed, request %u bytes \n", (unsigned )errorCode);
cBuff += iSize;
iSize = errorCode;
errorCode = LZ4F_decompress(dCtx, decodedBuffer, &destSize, cBuff, &iSize, NULL);
UT_VERIFY(errorCode == 0, return __LINE__);
crcDest = XXH64(decodedBuffer, decodedBufferSize, 1);
DISPLAYLEVEL(3, "crcDest (%08x)\n", (unsigned int)crcDest);
UT_VERIFY(crcDest == crcOrig, return __LINE__);
}
{
size_t oSize = 0;
size_t iSize = 0;
LZ4F_frameInfo_t fi;
DISPLAYLEVEL(3, "Start by feeding 0 bytes, to get next input size : ");
errorCode = LZ4F_decompress(dCtx, NULL, &oSize, ip, &iSize, NULL);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
DISPLAYLEVEL(3, " %u \n", (unsigned )errorCode);
DISPLAYLEVEL(3, "get FrameInfo on null input : ");
errorCode = LZ4F_getFrameInfo(dCtx, &fi, ip, &iSize);
UT_VERIFY(errorCode == (size_t) -LZ4F_ERROR_frameHeader_incomplete, return __LINE__);
DISPLAYLEVEL(3, " correctly failed : %s \n", LZ4F_getErrorName(errorCode));
DISPLAYLEVEL(3, "get FrameInfo on not enough input : ");
iSize = 6;
errorCode = LZ4F_getFrameInfo(dCtx, &fi, ip, &iSize);
UT_VERIFY(errorCode == (size_t) -LZ4F_ERROR_frameHeader_incomplete, return __LINE__);
DISPLAYLEVEL(3, " correctly failed : %s \n", LZ4F_getErrorName(errorCode));
ip += iSize;
DISPLAYLEVEL(3, "get FrameInfo on enough input : ");
iSize = 15 - iSize;
errorCode = LZ4F_getFrameInfo(dCtx, &fi, ip, &iSize);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
DISPLAYLEVEL(3, " correctly decoded \n");
ip += iSize;
}
DISPLAYLEVEL(3, "Byte after byte : \n");
while (ip < iend) {
size_t oSize = oend - op;
size_t iSize = 1;
errorCode = LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, NULL);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
op += oSize;
ip += iSize;
}
crcDest = XXH64(decodedBuffer, decodedBufferSize, 1);
UT_VERIFY(crcDest == crcOrig, return __LINE__);
DISPLAYLEVEL(3, "Regenerated %u/%u bytes \n", (unsigned )(op - (BYTE* )decodedBuffer), (unsigned )decodedBufferSize);
errorCode = LZ4F_freeDecompressionContext(dCtx);
UT_VERIFY(!LZ4F_isError(errorCode), return __LINE__);
dCtx = NULL;
return 0;
}
static int
decompress_fd_lz4(int fdi, int fdo)
{
#ifdef HAVE_LZ4
enum { LZ4_DEC_BUF_SIZE = 64*1024u };
LZ4F_decompressionContext_t ctx = NULL;
LZ4F_errorCode_t c;
char *buf = NULL;
char *src = NULL;
int r = 0;
struct stat fdist;
c = LZ4F_createDecompressionContext(&ctx, LZ4F_VERSION);
if (LZ4F_isError(c))
{
log_debug("Failed to initialized LZ4: %s", LZ4F_getErrorName(c));
r = -ENOMEM;
goto cleanup;
}
buf = malloc(LZ4_DEC_BUF_SIZE);
if (!buf)
{
r = -errno;
goto cleanup;
}
if (fstat(fdi, &fdist) < 0)
{
r = -errno;
log_debug("Failed to stat the input fd");
goto cleanup;
}
src = mmap(NULL, fdist.st_size, PROT_READ, MAP_PRIVATE, fdi, 0);
if (!src)
{
r = -errno;
log_debug("Failed to mmap the input fd");
goto cleanup;
}
off_t total_in = 0;
while (fdist.st_size != total_in)
{
size_t used = fdist.st_size - total_in;
size_t produced = LZ4_DEC_BUF_SIZE;
c = LZ4F_decompress(ctx, buf, &produced, src + total_in, &used, NULL);
if (LZ4F_isError(c))
{
log_debug("Failed to decode LZ4 block: %s", LZ4F_getErrorName(c));
r = -EBADMSG;
goto cleanup;
}
r = safe_write(fdo, buf, produced);
if (r < 0)
{
log_debug("Failed to write decoded block");
goto cleanup;
}
total_in += used;
}
r = 0;
cleanup:
if (ctx != NULL)
LZ4F_freeDecompressionContext(ctx);
if (buf != NULL)
free(buf);
if (src != NULL)
munmap(src, fdist.st_size);
return r;
#else /*HAVE_LZ4*/
const char *cmd[] = { "lz4", "-cd", "-", NULL};
return decompress_using_fork_execvp(cmd, fdi, fdo);
#endif /*HAVE_LZ4*/
}
