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Merge branch 'dev' into dubtlazy 

and fixed conflicts
dev
Yann Collet 2018-01-11 13:25:08 -08:00
parent b9a14900ff 04c00f9388
commit cacf47cbee
13 changed files with 370 additions and 323 deletions
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2
appveyor.yml
View File

@ -9,7 +9,7 @@
- COMPILER: "gcc"
HOST: "mingw"
PLATFORM: "x64"
SCRIPT: "make allzstd MOREFLAGS=-static && make -C tests test-symbols fullbench-dll fullbench-lib"
SCRIPT: "make allzstd MOREFLAGS=-static && make -C tests test-symbols fullbench-lib"
ARTIFACT: "true"
BUILD: "true"
- COMPILER: "gcc"

4
lib/common/huf.h
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@ -206,10 +206,10 @@ The following API allows targeting specific sub-functions for advanced tasks.
For example, it's possible to compress several blocks using the same 'CTable',
or to save and regenerate 'CTable' using external methods.
*/
/* FSE_count() : find it within "fse.h" */
/* FSE_count() : exposed within "fse.h" */
unsigned HUF_optimalTableLog(unsigned maxTableLog, size_t srcSize, unsigned maxSymbolValue);
typedef struct HUF_CElt_s HUF_CElt; /* incomplete type */
size_t HUF_buildCTable (HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue, unsigned maxNbBits);
size_t HUF_buildCTable (HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue, unsigned maxNbBits); /* @return : maxNbBits; CTable and count can overlap, in which case, CTable will overwrite count content */
size_t HUF_writeCTable (void* dst, size_t maxDstSize, const HUF_CElt* CTable, unsigned maxSymbolValue, unsigned huffLog);
size_t HUF_compress4X_usingCTable(void* dst, size_t dstSize, const void* src, size_t srcSize, const HUF_CElt* CTable);

1
lib/compress/huf_compress.c
View File

@ -405,6 +405,7 @@ size_t HUF_buildCTable_wksp (HUF_CElt* tree, const U32* count, U32 maxSymbolValu
}
/** HUF_buildCTable() :
* @return : maxNbBits
* Note : count is used before tree is written, so they can safely overlap
*/
size_t HUF_buildCTable (HUF_CElt* tree, const U32* count, U32 maxSymbolValue, U32 maxNbBits)

1
lib/compress/zstd_compress.c
View File

@ -2461,7 +2461,6 @@ ZSTD_CDict* ZSTD_initStaticCDict(void* workspace, size_t workspaceSize,
+ cctxSize;
ZSTD_CDict* const cdict = (ZSTD_CDict*) workspace;
void* ptr;
DEBUGLOG(4, "(size_t)workspace & 7 : %u", (U32)(size_t)workspace & 7);
if ((size_t)workspace & 7) return NULL; /* 8-aligned */
DEBUGLOG(4, "(workspaceSize < neededSize) : (%u < %u) => %u",
(U32)workspaceSize, (U32)neededSize, (U32)(workspaceSize < neededSize));

19
lib/dictBuilder/cover.c
View File

@ -537,8 +537,8 @@ static int COVER_ctx_init(COVER_ctx_t *ctx, const void *samplesBuffer,
/* Checks */
if (totalSamplesSize < MAX(d, sizeof(U64)) ||
totalSamplesSize >= (size_t)COVER_MAX_SAMPLES_SIZE) {
DISPLAYLEVEL(1, "Total samples size is too large, maximum size is %u MB\n",
(COVER_MAX_SAMPLES_SIZE >> 20));
DISPLAYLEVEL(1, "Total samples size is too large (%u MB), maximum size is %u MB\n",
(U32)(totalSamplesSize>>20), (COVER_MAX_SAMPLES_SIZE >> 20));
return 0;
}
/* Zero the context */
@ -651,12 +651,16 @@ static size_t COVER_buildDictionary(const COVER_ctx_t *ctx, U32 *freqs,
}
ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover(
void *dictBuffer, size_t dictBufferCapacity, const void *samplesBuffer,
const size_t *samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t parameters) {
BYTE *const dict = (BYTE *)dictBuffer;
void *dictBuffer, size_t dictBufferCapacity,
const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t parameters)
{
BYTE* const dict = (BYTE*)dictBuffer;
COVER_ctx_t ctx;
COVER_map_t activeDmers;
/* Initialize global data */
g_displayLevel = parameters.zParams.notificationLevel;
/* Checks */
if (!COVER_checkParameters(parameters, dictBufferCapacity)) {
DISPLAYLEVEL(1, "Cover parameters incorrect\n");
@ -671,8 +675,6 @@ ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover(
ZDICT_DICTSIZE_MIN);
return ERROR(dstSize_tooSmall);
}
/* Initialize global data */
g_displayLevel = parameters.zParams.notificationLevel;
/* Initialize context and activeDmers */
if (!COVER_ctx_init(&ctx, samplesBuffer, samplesSizes, nbSamples,
parameters.d)) {
@ -947,6 +949,7 @@ ZDICTLIB_API size_t ZDICT_optimizeTrainFromBuffer_cover(
unsigned k;
COVER_best_t best;
POOL_ctx *pool = NULL;
/* Checks */
if (kMinK < kMaxD || kMaxK < kMinK) {
LOCALDISPLAYLEVEL(displayLevel, 1, "Incorrect parameters\n");

133
lib/dictBuilder/zdict.c
View File

@ -207,7 +207,6 @@ static dictItem ZDICT_analyzePos(
U32 cumulLength[LLIMIT] = {0};
U32 savings[LLIMIT] = {0};
const BYTE* b = (const BYTE*)buffer;
size_t length;
size_t maxLength = LLIMIT;
size_t pos = suffix[start];
U32 end = start;
@ -222,26 +221,30 @@ static dictItem ZDICT_analyzePos(
||(MEM_read16(b+pos+1) == MEM_read16(b+pos+3))
||(MEM_read16(b+pos+2) == MEM_read16(b+pos+4)) ) {
/* skip and mark segment */
U16 u16 = MEM_read16(b+pos+4);
U32 u, e = 6;
while (MEM_read16(b+pos+e) == u16) e+=2 ;
if (b[pos+e] == b[pos+e-1]) e++;
for (u=1; u<e; u++)
U16 const pattern16 = MEM_read16(b+pos+4);
U32 u, patternEnd = 6;
while (MEM_read16(b+pos+patternEnd) == pattern16) patternEnd+=2 ;
if (b[pos+patternEnd] == b[pos+patternEnd-1]) patternEnd++;
for (u=1; u<patternEnd; u++)
doneMarks[pos+u] = 1;
return solution;
}
/* look forward */
do {
end++;
length = ZDICT_count(b + pos, b + suffix[end]);
} while (length >=MINMATCHLENGTH);
{ size_t length;
do {
end++;
length = ZDICT_count(b + pos, b + suffix[end]);
} while (length >= MINMATCHLENGTH);
}
/* look backward */
do {
length = ZDICT_count(b + pos, b + *(suffix+start-1));
if (length >=MINMATCHLENGTH) start--;
} while(length >= MINMATCHLENGTH);
{ size_t length;
do {
length = ZDICT_count(b + pos, b + *(suffix+start-1));
if (length >=MINMATCHLENGTH) start--;
} while(length >= MINMATCHLENGTH);
}
/* exit if not found a minimum nb of repetitions */
if (end-start < minRatio) {
@ -268,7 +271,7 @@ static dictItem ZDICT_analyzePos(
U32 selectedCount = 0;
U32 selectedID = currentID;
for (id =refinedStart; id < refinedEnd; id++) {
if (b[ suffix[id] + searchLength] != currentChar) {
if (b[suffix[id] + searchLength] != currentChar) {
if (currentCount > selectedCount) {
selectedCount = currentCount;
selectedID = currentID;
@ -297,20 +300,23 @@ static dictItem ZDICT_analyzePos(
memset(lengthList, 0, sizeof(lengthList));
/* look forward */
do {
end++;
length = ZDICT_count(b + pos, b + suffix[end]);
if (length >= LLIMIT) length = LLIMIT-1;
lengthList[length]++;
} while (length >=MINMATCHLENGTH);
{ size_t length;
do {
end++;
length = ZDICT_count(b + pos, b + suffix[end]);
if (length >= LLIMIT) length = LLIMIT-1;
lengthList[length]++;
} while (length >=MINMATCHLENGTH);
}
/* look backward */
length = MINMATCHLENGTH;
while ((length >= MINMATCHLENGTH) & (start > 0)) {
length = ZDICT_count(b + pos, b + suffix[start - 1]);
if (length >= LLIMIT) length = LLIMIT - 1;
lengthList[length]++;
if (length >= MINMATCHLENGTH) start--;
{ size_t length = MINMATCHLENGTH;
while ((length >= MINMATCHLENGTH) & (start > 0)) {
length = ZDICT_count(b + pos, b + suffix[start - 1]);
if (length >= LLIMIT) length = LLIMIT - 1;
lengthList[length]++;
if (length >= MINMATCHLENGTH) start--;
}
}
/* largest useful length */
@ -345,12 +351,12 @@ static dictItem ZDICT_analyzePos(
/* mark positions done */
{ U32 id;
for (id=start; id<end; id++) {
U32 p, pEnd;
U32 p, pEnd, length;
U32 const testedPos = suffix[id];
if (testedPos == pos)
length = solution.length;
else {
length = ZDICT_count(b+pos, b+testedPos);
length = (U32)ZDICT_count(b+pos, b+testedPos);
if (length > solution.length) length = solution.length;
}
pEnd = (U32)(testedPos + length);
@ -575,29 +581,30 @@ static void ZDICT_fillNoise(void* buffer, size_t length)
typedef struct
{
ZSTD_CCtx* ref;
ZSTD_CCtx* zc;
ZSTD_CCtx* ref; /* contains reference to dictionary */
ZSTD_CCtx* zc; /* working context */
void* workPlace; /* must be ZSTD_BLOCKSIZE_MAX allocated */
} EStats_ress_t;
#define MAXREPOFFSET 1024
static void ZDICT_countEStats(EStats_ress_t esr, ZSTD_parameters params,
U32* countLit, U32* offsetcodeCount, U32* matchlengthCount, U32* litlengthCount, U32* repOffsets,
const void* src, size_t srcSize, U32 notificationLevel)
U32* countLit, U32* offsetcodeCount, U32* matchlengthCount, U32* litlengthCount, U32* repOffsets,
const void* src, size_t srcSize,
U32 notificationLevel)
{
size_t const blockSizeMax = MIN (ZSTD_BLOCKSIZE_MAX, 1 << params.cParams.windowLog);
size_t cSize;
if (srcSize > blockSizeMax) srcSize = blockSizeMax; /* protection vs large samples */
{ size_t const errorCode = ZSTD_copyCCtx(esr.zc, esr.ref, 0);
if (ZSTD_isError(errorCode)) { DISPLAYLEVEL(1, "warning : ZSTD_copyCCtx failed \n"); return; }
{ size_t const errorCode = ZSTD_copyCCtx(esr.zc, esr.ref, 0);
if (ZSTD_isError(errorCode)) { DISPLAYLEVEL(1, "warning : ZSTD_copyCCtx failed \n"); return; }
}
cSize = ZSTD_compressBlock(esr.zc, esr.workPlace, ZSTD_BLOCKSIZE_MAX, src, srcSize);
if (ZSTD_isError(cSize)) { DISPLAYLEVEL(3, "warning : could not compress sample size %u \n", (U32)srcSize); return; }
if (cSize) { /* if == 0; block is not compressible */
const seqStore_t* seqStorePtr = ZSTD_getSeqStore(esr.zc);
const seqStore_t* const seqStorePtr = ZSTD_getSeqStore(esr.zc);
/* literals stats */
{ const BYTE* bytePtr;
@ -659,6 +666,18 @@ static void ZDICT_insertSortCount(offsetCount_t table[ZSTD_REP_NUM+1], U32 val,
}
}
/* ZDICT_flatLit() :
* rewrite `countLit` to contain a mostly flat but still compressible distribution of literals.
* necessary to avoid generating a non-compressible distribution that HUF_writeCTable() cannot encode.
*/
static void ZDICT_flatLit(U32* countLit)
{
int u;
for (u=1; u<256; u++) countLit[u] = 2;
countLit[0] = 4;
countLit[253] = 1;
countLit[254] = 1;
}
#define OFFCODE_MAX 30 /* only applicable to first block */
static size_t ZDICT_analyzeEntropy(void* dstBuffer, size_t maxDstSize,
@ -688,6 +707,7 @@ static size_t ZDICT_analyzeEntropy(void* dstBuffer, size_t maxDstSize,
BYTE* dstPtr = (BYTE*)dstBuffer;
/* init */
DEBUGLOG(4, "ZDICT_analyzeEntropy");
esr.ref = ZSTD_createCCtx();
esr.zc = ZSTD_createCCtx();
esr.workPlace = malloc(ZSTD_BLOCKSIZE_MAX);
@ -713,7 +733,7 @@ static size_t ZDICT_analyzeEntropy(void* dstBuffer, size_t maxDstSize,
goto _cleanup;
} }
/* collect stats on all files */
/* collect stats on all samples */
for (u=0; u<nbFiles; u++) {
ZDICT_countEStats(esr, params,
countLit, offcodeCount, matchLengthCount, litLengthCount, repOffset,
@ -722,14 +742,21 @@ static size_t ZDICT_analyzeEntropy(void* dstBuffer, size_t maxDstSize,
pos += fileSizes[u];
}
/* analyze */
errorCode = HUF_buildCTable (hufTable, countLit, 255, huffLog);
if (HUF_isError(errorCode)) {
eSize = ERROR(GENERIC);
DISPLAYLEVEL(1, "HUF_buildCTable error \n");
goto _cleanup;
/* analyze, build stats, starting with literals */
{ size_t maxNbBits = HUF_buildCTable (hufTable, countLit, 255, huffLog);
if (HUF_isError(maxNbBits)) {
eSize = ERROR(GENERIC);
DISPLAYLEVEL(1, " HUF_buildCTable error \n");
goto _cleanup;
}
if (maxNbBits==8) { /* not compressible : will fail on HUF_writeCTable() */
DISPLAYLEVEL(2, "warning : pathological dataset : literals are not compressible : samples are noisy or too regular \n");
ZDICT_flatLit(countLit); /* replace distribution by a fake "mostly flat but still compressible" distribution, that HUF_writeCTable() can encode */
maxNbBits = HUF_buildCTable (hufTable, countLit, 255, huffLog);
assert(maxNbBits==9);
}
huffLog = (U32)maxNbBits;
}
huffLog = (U32)errorCode;
/* looking for most common first offsets */
{ U32 offset;
@ -850,6 +877,7 @@ size_t ZDICT_finalizeDictionary(void* dictBuffer, size_t dictBufferCapacity,
U32 const notificationLevel = params.notificationLevel;
/* check conditions */
DEBUGLOG(4, "ZDICT_finalizeDictionary");
if (dictBufferCapacity < dictContentSize) return ERROR(dstSize_tooSmall);
if (dictContentSize < ZDICT_CONTENTSIZE_MIN) return ERROR(srcSize_wrong);
if (dictBufferCapacity < ZDICT_DICTSIZE_MIN) return ERROR(dstSize_tooSmall);
@ -1025,8 +1053,9 @@ size_t ZDICT_trainFromBuffer_unsafe_legacy(
}
/* issue : samplesBuffer need to be followed by a noisy guard band.
* work around : duplicate the buffer, and add the noise */
/* ZDICT_trainFromBuffer_legacy() :
* issue : samplesBuffer need to be followed by a noisy guard band.
* work around : duplicate the buffer, and add the noise */
size_t ZDICT_trainFromBuffer_legacy(void* dictBuffer, size_t dictBufferCapacity,
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples,
ZDICT_legacy_params_t params)
@ -1054,18 +1083,22 @@ size_t ZDICT_trainFromBuffer(void* dictBuffer, size_t dictBufferCapacity,
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples)
{
ZDICT_cover_params_t params;
DEBUGLOG(3, "ZDICT_trainFromBuffer");
memset(&params, 0, sizeof(params));
params.d = 8;
params.steps = 4;
/* Default to level 6 since no compression level information is avaialble */
/* Default to level 6 since no compression level information is available */
params.zParams.compressionLevel = 6;
#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=1)
params.zParams.notificationLevel = ZSTD_DEBUG;
#endif
return ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, dictBufferCapacity,
samplesBuffer, samplesSizes,
nbSamples, &params);
samplesBuffer, samplesSizes, nbSamples,
&params);
}
size_t ZDICT_addEntropyTablesFromBuffer(void* dictBuffer, size_t dictContentSize, size_t dictBufferCapacity,
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples)
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples)
{
ZDICT_params_t params;
memset(&params, 0, sizeof(params));

85
lib/dictBuilder/zdict.h
View File

@ -38,21 +38,21 @@ extern "C" {
/*! ZDICT_trainFromBuffer():
* Train a dictionary from an array of samples.
* Uses ZDICT_optimizeTrainFromBuffer_cover() single-threaded, with d=8 and steps=4.
* Samples must be stored concatenated in a single flat buffer `samplesBuffer`,
* supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order.
* The resulting dictionary will be saved into `dictBuffer`.
* Train a dictionary from an array of samples.
* Redirect towards ZDICT_optimizeTrainFromBuffer_cover() single-threaded, with d=8 and steps=4.
* Samples must be stored concatenated in a single flat buffer `samplesBuffer`,
* supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order.
* The resulting dictionary will be saved into `dictBuffer`.
* @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`)
* or an error code, which can be tested with ZDICT_isError().
* Note: ZDICT_trainFromBuffer() requires about 9 bytes of memory for each input byte.
* Tips: In general, a reasonable dictionary has a size of ~ 100 KB.
* It's obviously possible to target smaller or larger ones, just by specifying different `dictBufferCapacity`.
* In general, it's recommended to provide a few thousands samples, but this can vary a lot.
* or an error code, which can be tested with ZDICT_isError().
* Note: ZDICT_trainFromBuffer() requires about 9 bytes of memory for each input byte.
* Tips: In general, a reasonable dictionary has a size of ~ 100 KB.
* It's possible to select smaller or larger size, just by specifying `dictBufferCapacity`.
* In general, it's recommended to provide a few thousands samples, though this can vary a lot.
* It's recommended that total size of all samples be about ~x100 times the target size of dictionary.
*/
ZDICTLIB_API size_t ZDICT_trainFromBuffer(void* dictBuffer, size_t dictBufferCapacity,
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples);
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples);
/*====== Helper functions ======*/
@ -72,14 +72,14 @@ ZDICTLIB_API const char* ZDICT_getErrorName(size_t errorCode);
* ==================================================================================== */
typedef struct {
int compressionLevel; /* 0 means default; target a specific zstd compression level */
unsigned notificationLevel; /* Write to stderr; 0 = none (default); 1 = errors; 2 = progression; 3 = details; 4 = debug; */
unsigned dictID; /* 0 means auto mode (32-bits random value); other : force dictID value */
int compressionLevel; /* optimize for a specific zstd compression level; 0 means default */
unsigned notificationLevel; /* Write log to stderr; 0 = none (default); 1 = errors; 2 = progression; 3 = details; 4 = debug; */
unsigned dictID; /* force dictID value; 0 means auto mode (32-bits random value) */
} ZDICT_params_t;
/*! ZDICT_cover_params_t:
* For all values 0 means default.
* k and d are the only required parameters.
* For others, value 0 means default.
*/
typedef struct {
unsigned k; /* Segment size : constraint: 0 < k : Reasonable range [16, 2048+] */
@ -91,28 +91,28 @@ typedef struct {
/*! ZDICT_trainFromBuffer_cover():
* Train a dictionary from an array of samples using the COVER algorithm.
* Samples must be stored concatenated in a single flat buffer `samplesBuffer`,
* supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order.
* The resulting dictionary will be saved into `dictBuffer`.
* Train a dictionary from an array of samples using the COVER algorithm.
* Samples must be stored concatenated in a single flat buffer `samplesBuffer`,
* supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order.
* The resulting dictionary will be saved into `dictBuffer`.
* @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`)
* or an error code, which can be tested with ZDICT_isError().
* Note: ZDICT_trainFromBuffer_cover() requires about 9 bytes of memory for each input byte.
* Tips: In general, a reasonable dictionary has a size of ~ 100 KB.
* It's obviously possible to target smaller or larger ones, just by specifying different `dictBufferCapacity`.
* In general, it's recommended to provide a few thousands samples, but this can vary a lot.
* or an error code, which can be tested with ZDICT_isError().
* Note: ZDICT_trainFromBuffer_cover() requires about 9 bytes of memory for each input byte.
* Tips: In general, a reasonable dictionary has a size of ~ 100 KB.
* It's possible to select smaller or larger size, just by specifying `dictBufferCapacity`.
* In general, it's recommended to provide a few thousands samples, though this can vary a lot.
* It's recommended that total size of all samples be about ~x100 times the target size of dictionary.
*/
ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover(
void *dictBuffer, size_t dictBufferCapacity, const void *samplesBuffer,
const size_t *samplesSizes, unsigned nbSamples,
void *dictBuffer, size_t dictBufferCapacity,
const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t parameters);
/*! ZDICT_optimizeTrainFromBuffer_cover():
* The same requirements as above hold for all the parameters except `parameters`.
* This function tries many parameter combinations and picks the best parameters.
* `*parameters` is filled with the best parameters found, and the dictionary
* constructed with those parameters is stored in `dictBuffer`.
* `*parameters` is filled with the best parameters found,
* dictionary constructed with those parameters is stored in `dictBuffer`.
*
* All of the parameters d, k, steps are optional.
* If d is non-zero then we don't check multiple values of d, otherwise we check d = {6, 8, 10, 12, 14, 16}.
@ -125,9 +125,9 @@ ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover(
* Note: ZDICT_optimizeTrainFromBuffer_cover() requires about 8 bytes of memory for each input byte and additionally another 5 bytes of memory for each byte of memory for each thread.
*/
ZDICTLIB_API size_t ZDICT_optimizeTrainFromBuffer_cover(
void *dictBuffer, size_t dictBufferCapacity, const void *samplesBuffer,
const size_t *samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t *parameters);
void* dictBuffer, size_t dictBufferCapacity,
const void* samplesBuffer, const size_t* samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t* parameters);
/*! ZDICT_finalizeDictionary():
* Given a custom content as a basis for dictionary, and a set of samples,
@ -157,22 +157,23 @@ typedef struct {
} ZDICT_legacy_params_t;
/*! ZDICT_trainFromBuffer_legacy():
* Train a dictionary from an array of samples.
* Samples must be stored concatenated in a single flat buffer `samplesBuffer`,
* supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order.
* The resulting dictionary will be saved into `dictBuffer`.
* Train a dictionary from an array of samples.
* Samples must be stored concatenated in a single flat buffer `samplesBuffer`,
* supplied with an array of sizes `samplesSizes`, providing the size of each sample, in order.
* The resulting dictionary will be saved into `dictBuffer`.
* `parameters` is optional and can be provided with values set to 0 to mean "default".
* @return: size of dictionary stored into `dictBuffer` (<= `dictBufferCapacity`)
* or an error code, which can be tested with ZDICT_isError().
* Tips: In general, a reasonable dictionary has a size of ~ 100 KB.
* It's obviously possible to target smaller or larger ones, just by specifying different `dictBufferCapacity`.
* In general, it's recommended to provide a few thousands samples, but this can vary a lot.
* or an error code, which can be tested with ZDICT_isError().
* Tips: In general, a reasonable dictionary has a size of ~ 100 KB.
* It's possible to select smaller or larger size, just by specifying `dictBufferCapacity`.
* In general, it's recommended to provide a few thousands samples, though this can vary a lot.
* It's recommended that total size of all samples be about ~x100 times the target size of dictionary.
* Note: ZDICT_trainFromBuffer_legacy() will send notifications into stderr if instructed to, using notificationLevel>0.
* Note: ZDICT_trainFromBuffer_legacy() will send notifications into stderr if instructed to, using notificationLevel>0.
*/
ZDICTLIB_API size_t ZDICT_trainFromBuffer_legacy(
void *dictBuffer, size_t dictBufferCapacity, const void *samplesBuffer,
const size_t *samplesSizes, unsigned nbSamples, ZDICT_legacy_params_t parameters);
void *dictBuffer, size_t dictBufferCapacity,
const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples,
ZDICT_legacy_params_t parameters);
/* Deprecation warnings */
/* It is generally possible to disable deprecation warnings from compiler,

234
lib/zstd.h
View File

@ -45,11 +45,11 @@ extern "C" {
Levels >= 20, labeled `--ultra`, should be used with caution, as they require more memory.
Compression can be done in:
- a single step (described as Simple API)
- a single step, reusing a context (described as Explicit memory management)
- a single step, reusing a context (described as Explicit context)
- unbounded multiple steps (described as Streaming compression)
The compression ratio achievable on small data can be highly improved using a dictionary in:
- a single step (described as Simple dictionary API)
- a single step, reusing a dictionary (described as Fast dictionary API)
- a single step, reusing a dictionary (described as Bulk-processing dictionary API)
Advanced experimental functions can be accessed using #define ZSTD_STATIC_LINKING_ONLY before including zstd.h.
Advanced experimental APIs shall never be used with a dynamic library.
@ -68,7 +68,7 @@ ZSTDLIB_API unsigned ZSTD_versionNumber(void); /**< useful to check dll versio
#define ZSTD_QUOTE(str) #str
#define ZSTD_EXPAND_AND_QUOTE(str) ZSTD_QUOTE(str)
#define ZSTD_VERSION_STRING ZSTD_EXPAND_AND_QUOTE(ZSTD_LIB_VERSION)
ZSTDLIB_API const char* ZSTD_versionString(void); /* v1.3.0 */
ZSTDLIB_API const char* ZSTD_versionString(void); /* added in v1.3.0 */
/***************************************
@ -92,7 +92,7 @@ ZSTDLIB_API size_t ZSTD_compress( void* dst, size_t dstCapacity,
ZSTDLIB_API size_t ZSTD_decompress( void* dst, size_t dstCapacity,
const void* src, size_t compressedSize);
/*! ZSTD_getFrameContentSize() : v1.3.0
/*! ZSTD_getFrameContentSize() : added in v1.3.0
* `src` should point to the start of a ZSTD encoded frame.
* `srcSize` must be at least as large as the frame header.
* hint : any size >= `ZSTD_frameHeaderSize_max` is large enough.
@ -120,26 +120,24 @@ ZSTDLIB_API unsigned long long ZSTD_getFrameContentSize(const void *src, size_t
/*! ZSTD_getDecompressedSize() :
* NOTE: This function is now obsolete, in favor of ZSTD_getFrameContentSize().
* Both functions work the same way,
* but ZSTD_getDecompressedSize() blends
* "empty", "unknown" and "error" results in the same return value (0),
* while ZSTD_getFrameContentSize() distinguishes them.
*
* 'src' is the start of a zstd compressed frame.
* @return : content size to be decompressed, as a 64-bits value _if known and not empty_, 0 otherwise. */
* Both functions work the same way, but ZSTD_getDecompressedSize() blends
* "empty", "unknown" and "error" results to the same return value (0),
* while ZSTD_getFrameContentSize() gives them separate return values.
* `src` is the start of a zstd compressed frame.
* @return : content size to be decompressed, as a 64-bits value _if known and not empty_, 0 otherwise. */
ZSTDLIB_API unsigned long long ZSTD_getDecompressedSize(const void* src, size_t srcSize);
/*====== Helper functions ======*/
#define ZSTD_COMPRESSBOUND(srcSize) ((srcSize) + ((srcSize)>>8) + (((srcSize) < (128<<10)) ? (((128<<10) - (srcSize)) >> 11) /* margin, from 64 to 0 */ : 0)) /* this formula ensures that bound(A) + bound(B) <= bound(A+B) as long as A and B >= 128 KB */
ZSTDLIB_API size_t ZSTD_compressBound(size_t srcSize); /*!< maximum compressed size in worst case scenario */
ZSTDLIB_API size_t ZSTD_compressBound(size_t srcSize); /*!< maximum compressed size in worst case single-pass scenario */
ZSTDLIB_API unsigned ZSTD_isError(size_t code); /*!< tells if a `size_t` function result is an error code */
ZSTDLIB_API const char* ZSTD_getErrorName(size_t code); /*!< provides readable string from an error code */
ZSTDLIB_API int ZSTD_maxCLevel(void); /*!< maximum compression level available */
/***************************************
* Explicit memory management
* Explicit context
***************************************/
/*= Compression context
* When compressing many times,
@ -345,7 +343,7 @@ ZSTDLIB_API size_t ZSTD_CStreamOutSize(void); /**< recommended size for output
* *******************************************************************************/
typedef ZSTD_DCtx ZSTD_DStream; /**< DCtx and DStream are now effectively same object (>= v1.3.0) */
/* Continue to distinguish them for compatibility with versions <= v1.2.0 */
/* For compatibility with versions <= v1.2.0, continue to consider them separated. */
/*===== ZSTD_DStream management functions =====*/
ZSTDLIB_API ZSTD_DStream* ZSTD_createDStream(void);
ZSTDLIB_API size_t ZSTD_freeDStream(ZSTD_DStream* zds);
@ -375,15 +373,15 @@ ZSTDLIB_API size_t ZSTD_DStreamOutSize(void); /*!< recommended size for output
/* --- Constants ---*/
#define ZSTD_MAGICNUMBER 0xFD2FB528 /* >= v0.8.0 */
#define ZSTD_MAGIC_SKIPPABLE_START 0x184D2A50U
#define ZSTD_MAGIC_DICTIONARY 0xEC30A437 /* v0.7+ */
#define ZSTD_MAGIC_DICTIONARY 0xEC30A437 /* >= v0.7.0 */
#define ZSTD_WINDOWLOG_MAX_32 30
#define ZSTD_WINDOWLOG_MAX_64 31
#define ZSTD_WINDOWLOG_MAX ((unsigned)(sizeof(size_t) == 4 ? ZSTD_WINDOWLOG_MAX_32 : ZSTD_WINDOWLOG_MAX_64))
#define ZSTD_WINDOWLOG_MIN 10
#define ZSTD_HASHLOG_MAX MIN(ZSTD_WINDOWLOG_MAX, 30)
#define ZSTD_HASHLOG_MAX ((ZSTD_WINDOWLOG_MAX < 30) ? ZSTD_WINDOWLOG_MAX : 30)
#define ZSTD_HASHLOG_MIN 6
#define ZSTD_CHAINLOG_MAX MIN(ZSTD_WINDOWLOG_MAX+1, 30)
#define ZSTD_CHAINLOG_MAX ((ZSTD_WINDOWLOG_MAX < 29) ? ZSTD_WINDOWLOG_MAX+1 : 30)
#define ZSTD_CHAINLOG_MIN ZSTD_HASHLOG_MIN
#define ZSTD_HASHLOG3_MAX 17
#define ZSTD_SEARCHLOG_MAX (ZSTD_WINDOWLOG_MAX-1)
@ -432,12 +430,17 @@ typedef struct {
typedef struct ZSTD_CCtx_params_s ZSTD_CCtx_params;
/*--- Custom memory allocation functions ---*/
typedef void* (*ZSTD_allocFunction) (void* opaque, size_t size);
typedef void (*ZSTD_freeFunction) (void* opaque, void* address);
typedef struct { ZSTD_allocFunction customAlloc; ZSTD_freeFunction customFree; void* opaque; } ZSTD_customMem;
/* use this constant to defer to stdlib's functions */
static ZSTD_customMem const ZSTD_defaultCMem = { NULL, NULL, NULL };
typedef enum {
ZSTD_dm_auto=0, /* dictionary is "full" if it starts with ZSTD_MAGIC_DICTIONARY, otherwise it is "rawContent" */
ZSTD_dm_rawContent, /* ensures dictionary is always loaded as rawContent, even if it starts with ZSTD_MAGIC_DICTIONARY */
ZSTD_dm_fullDict /* refuses to load a dictionary if it does not respect Zstandard's specification */
} ZSTD_dictMode_e;
typedef enum {
ZSTD_dlm_byCopy = 0, /**< Copy dictionary content internally */
ZSTD_dlm_byRef, /**< Reference dictionary content -- the dictionary buffer must outlive its users. */
} ZSTD_dictLoadMethod_e;
/***************************************
@ -483,12 +486,12 @@ ZSTDLIB_API size_t ZSTD_frameHeaderSize(const void* src, size_t srcSize);
/***************************************
* Context memory usage
* Memory management
***************************************/
/*! ZSTD_sizeof_*() :
* These functions give the current memory usage of selected object.
* Object memory usage can evolve when re-used multiple times. */
* Object memory usage can evolve when re-used. */
ZSTDLIB_API size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx);
ZSTDLIB_API size_t ZSTD_sizeof_DCtx(const ZSTD_DCtx* dctx);
ZSTDLIB_API size_t ZSTD_sizeof_CStream(const ZSTD_CStream* zcs);
@ -504,7 +507,7 @@ ZSTDLIB_API size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict);
* If srcSize is known to always be small, ZSTD_estimateCCtxSize_usingCParams() can provide a tighter estimation.
* ZSTD_estimateCCtxSize_usingCParams() can be used in tandem with ZSTD_getCParams() to create cParams from compressionLevel.
* ZSTD_estimateCCtxSize_usingCCtxParams() can be used in tandem with ZSTD_CCtxParam_setParameter(). Only single-threaded compression is supported. This function will return an error code if ZSTD_p_nbThreads is > 1.
* Note : CCtx estimation is only correct for single-threaded compression */
* Note : CCtx size estimation is only correct for single-threaded compression. */
ZSTDLIB_API size_t ZSTD_estimateCCtxSize(int compressionLevel);
ZSTDLIB_API size_t ZSTD_estimateCCtxSize_usingCParams(ZSTD_compressionParameters cParams);
ZSTDLIB_API size_t ZSTD_estimateCCtxSize_usingCCtxParams(const ZSTD_CCtx_params* params);
@ -516,7 +519,7 @@ ZSTDLIB_API size_t ZSTD_estimateDCtxSize(void);
* If srcSize is known to always be small, ZSTD_estimateCStreamSize_usingCParams() can provide a tighter estimation.
* ZSTD_estimateCStreamSize_usingCParams() can be used in tandem with ZSTD_getCParams() to create cParams from compressionLevel.
* ZSTD_estimateCStreamSize_usingCCtxParams() can be used in tandem with ZSTD_CCtxParam_setParameter(). Only single-threaded compression is supported. This function will return an error code if ZSTD_p_nbThreads is set to a value > 1.
* Note : CStream estimation is only correct for single-threaded compression.
* Note : CStream size estimation is only correct for single-threaded compression.
* ZSTD_DStream memory budget depends on window Size.
* This information can be passed manually, using ZSTD_estimateDStreamSize,
* or deducted from a valid frame Header, using ZSTD_estimateDStreamSize_fromFrame();
@ -529,84 +532,88 @@ ZSTDLIB_API size_t ZSTD_estimateCStreamSize_usingCCtxParams(const ZSTD_CCtx_para
ZSTDLIB_API size_t ZSTD_estimateDStreamSize(size_t windowSize);
ZSTDLIB_API size_t ZSTD_estimateDStreamSize_fromFrame(const void* src, size_t srcSize);
typedef enum {
ZSTD_dlm_byCopy = 0, /**< Copy dictionary content internally */
ZSTD_dlm_byRef, /**< Reference dictionary content -- the dictionary buffer must outlive its users. */
} ZSTD_dictLoadMethod_e;
/*! ZSTD_estimate?DictSize() :
* ZSTD_estimateCDictSize() will bet that src size is relatively "small", and content is copied, like ZSTD_createCDict().
* ZSTD_estimateCStreamSize_advanced_usingCParams() makes it possible to control precisely compression parameters, like ZSTD_createCDict_advanced().
* Note : dictionary created by reference using ZSTD_dlm_byRef are smaller
* ZSTD_estimateCDictSize_advanced() makes it possible to control compression parameters precisely, like ZSTD_createCDict_advanced().
* Note : dictionaries created by reference (`ZSTD_dlm_byRef`) are logically smaller.
*/
ZSTDLIB_API size_t ZSTD_estimateCDictSize(size_t dictSize, int compressionLevel);
ZSTDLIB_API size_t ZSTD_estimateCDictSize_advanced(size_t dictSize, ZSTD_compressionParameters cParams, ZSTD_dictLoadMethod_e dictLoadMethod);
ZSTDLIB_API size_t ZSTD_estimateDDictSize(size_t dictSize, ZSTD_dictLoadMethod_e dictLoadMethod);
/***************************************
* Advanced compression functions
***************************************/
/*! ZSTD_createCCtx_advanced() :
* Create a ZSTD compression context using external alloc and free functions */
ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem);
/*! ZSTD_initStaticCCtx() : initialize a fixed-size zstd compression context
* workspace: The memory area to emplace the context into.
* Provided pointer must 8-bytes aligned.
* It must outlive context usage.
* workspaceSize: Use ZSTD_estimateCCtxSize() or ZSTD_estimateCStreamSize()
* to determine how large workspace must be to support scenario.
* @return : pointer to ZSTD_CCtx* (same address as workspace, but different type),
* or NULL if error (typically size too small)
* Note : zstd will never resize nor malloc() when using a static cctx.
* If it needs more memory than available, it will simply error out.
/*! ZSTD_initStatic*() :
* Initialize an object using a pre-allocated fixed-size buffer.
* workspace: The memory area to emplace the object into.
* Provided pointer *must be 8-bytes aligned*.
* Buffer must outlive object.
* workspaceSize: Use ZSTD_estimate*Size() to determine
* how large workspace must be to support target scenario.
* @return : pointer to object (same address as workspace, just different type),
* or NULL if error (size too small, incorrect alignment, etc.)
* Note : zstd will never resize nor malloc() when using a static buffer.
* If the object requires more memory than available,
* zstd will just error out (typically ZSTD_error_memory_allocation).
* Note 2 : there is no corresponding "free" function.
* Since workspace was allocated externally, it must be freed externally too.
* Limitation 1 : currently not compatible with internal CDict creation, such as
* ZSTD_CCtx_loadDictionary() or ZSTD_initCStream_usingDict().
* Limitation 2 : currently not compatible with multi-threading
* Since workspace is allocated externally, it must be freed externally too.
* Note 3 : cParams : use ZSTD_getCParams() to convert a compression level
* into its associated cParams.
* Limitation 1 : currently not compatible with internal dictionary creation, triggered by
* ZSTD_CCtx_loadDictionary(), ZSTD_initCStream_usingDict() or ZSTD_initDStream_usingDict().
* Limitation 2 : static cctx currently not compatible with multi-threading.
* Limitation 3 : static dctx is incompatible with legacy support.
*/
ZSTDLIB_API ZSTD_CCtx* ZSTD_initStaticCCtx(void* workspace, size_t workspaceSize);
ZSTDLIB_API ZSTD_CCtx* ZSTD_initStaticCCtx(void* workspace, size_t workspaceSize);
ZSTDLIB_API ZSTD_CStream* ZSTD_initStaticCStream(void* workspace, size_t workspaceSize); /**< same as ZSTD_initStaticCCtx() */
ZSTDLIB_API ZSTD_DCtx* ZSTD_initStaticDCtx(void* workspace, size_t workspaceSize);
ZSTDLIB_API ZSTD_DStream* ZSTD_initStaticDStream(void* workspace, size_t workspaceSize); /**< same as ZSTD_initStaticDCtx() */
/*! ZSTD_createCDict_byReference() :
* Create a digested dictionary for compression
* Dictionary content is simply referenced, and therefore stays in dictBuffer.
* It is important that dictBuffer outlives CDict, it must remain read accessible throughout the lifetime of CDict */
ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_byReference(const void* dictBuffer, size_t dictSize, int compressionLevel);
ZSTDLIB_API ZSTD_CDict* ZSTD_initStaticCDict(void* workspace, size_t workspaceSize,
const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod,
ZSTD_dictMode_e dictMode,
ZSTD_compressionParameters cParams);
ZSTDLIB_API ZSTD_DDict* ZSTD_initStaticDDict(void* workspace, size_t workspaceSize,
const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod);
/*! Custom memory allocation :
* These prototypes make it possible to pass your own allocation/free functions.
* ZSTD_customMem is provided at creation time, using ZSTD_create*_advanced() variants listed below.
* All allocation/free operations will be completed using these custom variants instead of regular <stdlib.h> ones.
*/
typedef void* (*ZSTD_allocFunction) (void* opaque, size_t size);
typedef void (*ZSTD_freeFunction) (void* opaque, void* address);
typedef struct { ZSTD_allocFunction customAlloc; ZSTD_freeFunction customFree; void* opaque; } ZSTD_customMem;
static ZSTD_customMem const ZSTD_defaultCMem = { NULL, NULL, NULL }; /**< this constant defers to stdlib's functions */
ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem);
ZSTDLIB_API ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem);
ZSTDLIB_API ZSTD_DCtx* ZSTD_createDCtx_advanced(ZSTD_customMem customMem);
ZSTDLIB_API ZSTD_DStream* ZSTD_createDStream_advanced(ZSTD_customMem customMem);
typedef enum { ZSTD_dm_auto=0, /* dictionary is "full" if it starts with ZSTD_MAGIC_DICTIONARY, otherwise it is "rawContent" */
ZSTD_dm_rawContent, /* ensures dictionary is always loaded as rawContent, even if it starts with ZSTD_MAGIC_DICTIONARY */
ZSTD_dm_fullDict /* refuses to load a dictionary if it does not respect Zstandard's specification */
} ZSTD_dictMode_e;
/*! ZSTD_createCDict_advanced() :
* Create a ZSTD_CDict using external alloc and free, and customized compression parameters */
ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_advanced(const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod,
ZSTD_dictMode_e dictMode,
ZSTD_compressionParameters cParams,
ZSTD_customMem customMem);
/*! ZSTD_initStaticCDict() :
* Generate a digested dictionary in provided memory area.
* workspace: The memory area to emplace the dictionary into.
* Provided pointer must 8-bytes aligned.
* It must outlive dictionary usage.
* workspaceSize: Use ZSTD_estimateCDictSize()
* to determine how large workspace must be.
* cParams : use ZSTD_getCParams() to transform a compression level
* into its relevants cParams.
* @return : pointer to ZSTD_CDict* (same address as workspace, but different type),
* or NULL if error (typically, size too small).
* Note : there is no corresponding "free" function.
* Since workspace was allocated externally, it must be freed externally.
*/
ZSTDLIB_API ZSTD_CDict* ZSTD_initStaticCDict(
void* workspace, size_t workspaceSize,
const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod, ZSTD_dictMode_e dictMode,
ZSTD_compressionParameters cParams);
ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod,
ZSTD_customMem customMem);
/***************************************
* Advanced compression functions
***************************************/
/*! ZSTD_createCDict_byReference() :
* Create a digested dictionary for compression
* Dictionary content is simply referenced, and therefore stays in dictBuffer.
* It is important that dictBuffer outlives CDict, it must remain read accessible throughout the lifetime of CDict */
ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_byReference(const void* dictBuffer, size_t dictSize, int compressionLevel);
/*! ZSTD_getCParams() :
* @return ZSTD_compressionParameters structure for a selected compression level and estimated srcSize.
@ -652,28 +659,6 @@ ZSTDLIB_API size_t ZSTD_compress_usingCDict_advanced(ZSTD_CCtx* cctx,
* Note 3 : Skippable Frame Identifiers are considered valid. */
ZSTDLIB_API unsigned ZSTD_isFrame(const void* buffer, size_t size);
/*! ZSTD_createDCtx_advanced() :
* Create a ZSTD decompression context using external alloc and free functions */
ZSTDLIB_API ZSTD_DCtx* ZSTD_createDCtx_advanced(ZSTD_customMem customMem);
/*! ZSTD_initStaticDCtx() : initialize a fixed-size zstd decompression context
* workspace: The memory area to emplace the context into.
* Provided pointer must 8-bytes aligned.
* It must outlive context usage.
* workspaceSize: Use ZSTD_estimateDCtxSize() or ZSTD_estimateDStreamSize()
* to determine how large workspace must be to support scenario.
* @return : pointer to ZSTD_DCtx* (same address as workspace, but different type),
* or NULL if error (typically size too small)
* Note : zstd will never resize nor malloc() when using a static dctx.
* If it needs more memory than available, it will simply error out.
* Note 2 : static dctx is incompatible with legacy support
* Note 3 : there is no corresponding "free" function.
* Since workspace was allocated externally, it must be freed externally.
* Limitation : currently not compatible with internal DDict creation,
* such as ZSTD_initDStream_usingDict().
*/
ZSTDLIB_API ZSTD_DCtx* ZSTD_initStaticDCtx(void* workspace, size_t workspaceSize);
/*! ZSTD_createDDict_byReference() :
* Create a digested dictionary, ready to start decompression operation without startup delay.
* Dictionary content is referenced, and therefore stays in dictBuffer.
@ -681,26 +666,6 @@ ZSTDLIB_API ZSTD_DCtx* ZSTD_initStaticDCtx(void* workspace, size_t workspaceSize
* it must remain read accessible throughout the lifetime of DDict */
ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict_byReference(const void* dictBuffer, size_t dictSize);
/*! ZSTD_createDDict_advanced() :
* Create a ZSTD_DDict using external alloc and free, optionally by reference */
ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod,
ZSTD_customMem customMem);
/*! ZSTD_initStaticDDict() :
* Generate a digested dictionary in provided memory area.
* workspace: The memory area to emplace the dictionary into.
* Provided pointer must 8-bytes aligned.
* It must outlive dictionary usage.
* workspaceSize: Use ZSTD_estimateDDictSize()
* to determine how large workspace must be.
* @return : pointer to ZSTD_DDict*, or NULL if error (size too small)
* Note : there is no corresponding "free" function.
* Since workspace was allocated externally, it must be freed externally.
*/
ZSTDLIB_API ZSTD_DDict* ZSTD_initStaticDDict(void* workspace, size_t workspaceSize,
const void* dict, size_t dictSize,
ZSTD_dictLoadMethod_e dictLoadMethod);
/*! ZSTD_getDictID_fromDict() :
* Provides the dictID stored within dictionary.
@ -732,8 +697,6 @@ ZSTDLIB_API unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize);
********************************************************************/
/*===== Advanced Streaming compression functions =====*/
ZSTDLIB_API ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem);
ZSTDLIB_API ZSTD_CStream* ZSTD_initStaticCStream(void* workspace, size_t workspaceSize); /**< same as ZSTD_initStaticCCtx() */
ZSTDLIB_API size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pledgedSrcSize); /**< pledgedSrcSize must be correct. If it is not known at init time, use ZSTD_CONTENTSIZE_UNKNOWN. Note that, for compatibility with older programs, "0" also disables frame content size field. It may be enabled in the future. */
ZSTDLIB_API size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t dictSize, int compressionLevel); /**< creates of an internal CDict (incompatible with static CCtx), except if dict == NULL or dictSize < 8, in which case no dict is used. Note: dict is loaded with ZSTD_dm_auto (treated as a full zstd dictionary if it begins with ZSTD_MAGIC_DICTIONARY, else as raw content) and ZSTD_dlm_byCopy.*/
ZSTDLIB_API size_t ZSTD_initCStream_advanced(ZSTD_CStream* zcs, const void* dict, size_t dictSize,
@ -754,8 +717,6 @@ ZSTDLIB_API size_t ZSTD_resetCStream(ZSTD_CStream* zcs, unsigned long long pledg
/*===== Advanced Streaming decompression functions =====*/
ZSTDLIB_API ZSTD_DStream* ZSTD_createDStream_advanced(ZSTD_customMem customMem);
ZSTDLIB_API ZSTD_DStream* ZSTD_initStaticDStream(void* workspace, size_t workspaceSize); /**< same as ZSTD_initStaticDCtx() */
typedef enum { DStream_p_maxWindowSize } ZSTD_DStreamParameter_e;
ZSTDLIB_API size_t ZSTD_setDStreamParameter(ZSTD_DStream* zds, ZSTD_DStreamParameter_e paramType, unsigned paramValue); /* obsolete : this API will be removed in a future version */
ZSTDLIB_API size_t ZSTD_initDStream_usingDict(ZSTD_DStream* zds, const void* dict, size_t dictSize); /**< note: no dictionary will be used if dict == NULL or dictSize < 8 */
@ -926,8 +887,7 @@ ZSTDLIB_API ZSTD_nextInputType_e ZSTD_nextInputType(ZSTD_DCtx* dctx);
*
* This API is intended to replace all others experimental API.
* It can basically do all other use cases, and even new ones.
* In constrast with _advanced() variants, it stands a reasonable chance to become "stable",
* after a good testing period.
* It stands a reasonable chance to become "stable", after a good testing period.
*/
/* note on naming convention :
@ -1172,7 +1132,7 @@ ZSTDLIB_API size_t ZSTD_compress_generic (ZSTD_CCtx* cctx,
* All parameters are back to default values.
* It's possible to modify compression parameters after a reset.
*/
ZSTDLIB_API void ZSTD_CCtx_reset(ZSTD_CCtx* cctx); /* Not ready yet ! */
ZSTDLIB_API void ZSTD_CCtx_reset(ZSTD_CCtx* cctx);
/*! ZSTD_compress_generic_simpleArgs() :
@ -1389,7 +1349,7 @@ ZSTDLIB_API void ZSTD_DCtx_reset(ZSTD_DCtx* dctx);
ZSTDLIB_API size_t ZSTD_getBlockSize (const ZSTD_CCtx* cctx);
ZSTDLIB_API size_t ZSTD_compressBlock (ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize);
ZSTDLIB_API size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize);
ZSTDLIB_API size_t ZSTD_insertBlock(ZSTD_DCtx* dctx, const void* blockStart, size_t blockSize); /**< insert uncompressed block into `dctx` history. Useful for multi-blocks decompression */
ZSTDLIB_API size_t ZSTD_insertBlock (ZSTD_DCtx* dctx, const void* blockStart, size_t blockSize); /**< insert uncompressed block into `dctx` history. Useful for multi-blocks decompression. */
#endif /* ZSTD_H_ZSTD_STATIC_LINKING_ONLY */

23
programs/fileio.c
View File

@ -139,7 +139,10 @@ static void INThandler(int sig)
#if !defined(_MSC_VER)
signal(sig, SIG_IGN); /* this invocation generates a buggy warning in Visual Studio */
#endif
if (g_artefact) remove(g_artefact);
if (g_artefact) {
assert(UTIL_isRegularFile(g_artefact));
remove(g_artefact);
}
DISPLAY("\n");
exit(2);
}
@ -861,7 +864,7 @@ static int FIO_compressFilename_srcFile(cRess_t ress,
* delete both the source and destination files.
*/
clearHandler();
if (remove(srcFileName))
if (FIO_remove(srcFileName))
EXM_THROW(1, "zstd: %s: %s", srcFileName, strerror(errno));
}
return result;
@ -898,11 +901,13 @@ static int FIO_compressFilename_dstFile(cRess_t ress,
DISPLAYLEVEL(1, "zstd: %s: %s \n", dstFileName, strerror(errno));
result=1;
}
if (result!=0) { /* remove operation artefact */
if (remove(dstFileName))
EXM_THROW(1, "zstd: %s: %s", dstFileName, strerror(errno));
}
else if (strcmp (dstFileName, stdoutmark) && stat_result)
if ( (result != 0) /* operation failure */
&& strcmp(dstFileName, nulmark) /* special case : don't remove() /dev/null */
&& strcmp(dstFileName, stdoutmark) ) /* special case : don't remove() stdout */
FIO_remove(dstFileName); /* remove compression artefact; note don't do anything special if remove() fails */
else if ( strcmp(dstFileName, stdoutmark)
&& strcmp(dstFileName, nulmark)
&& stat_result)
UTIL_setFileStat(dstFileName, &statbuf);
return result;
@ -1575,7 +1580,7 @@ static int FIO_decompressSrcFile(dRess_t ress, const char* dstFileName, const ch
* delete both the source and destination files.
*/
clearHandler();
if (remove(srcFileName)) {
if (FIO_remove(srcFileName)) {
/* failed to remove src file */
DISPLAYLEVEL(1, "zstd: %s: %s \n", srcFileName, strerror(errno));
return 1;
@ -1618,7 +1623,7 @@ static int FIO_decompressDstFile(dRess_t ress,
if ( (result != 0) /* operation failure */
&& strcmp(dstFileName, nulmark) /* special case : don't remove() /dev/null (#316) */
&& strcmp(dstFileName, stdoutmark) ) /* special case : don't remove() stdout */
remove(dstFileName); /* remove decompression artefact; note don't do anything special if remove() fails */
FIO_remove(dstFileName); /* remove decompression artefact; note don't do anything special if remove() fails */
else { /* operation success */
if ( strcmp(dstFileName, stdoutmark) /* special case : don't chmod stdout */
&& strcmp(dstFileName, nulmark) /* special case : don't chmod /dev/null */

6
programs/util.h
View File

@ -246,11 +246,17 @@ UTIL_STATIC void UTIL_waitForNextTick(void)
#endif
UTIL_STATIC int UTIL_isRegularFile(const char* infilename);
UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf)
{
int res = 0;
struct utimbuf timebuf;
if (!UTIL_isRegularFile(filename))
return -1;
timebuf.actime = time(NULL);
timebuf.modtime = statbuf->st_mtime;
res += utime(filename, &timebuf); /* set access and modification times */

129
tests/Makefile
View File

@ -21,7 +21,7 @@
ZSTDDIR = ../lib
PRGDIR = ../programs
PYTHON ?= python3
TESTARTEFACT := versionsTest namespaceTest
TESTARTEFACT := versionsTest
DEBUGLEVEL ?= 1
DEBUGFLAGS = -g -DZSTD_DEBUG=$(DEBUGLEVEL)
@ -44,6 +44,16 @@ ZSTD_FILES := $(ZSTDDECOMP_FILES) $(ZSTDCOMMON_FILES) $(ZSTDCOMP_FILES)
ZBUFF_FILES := $(ZSTDDIR)/deprecated/*.c
ZDICT_FILES := $(ZSTDDIR)/dictBuilder/*.c
ZSTD_F1 := $(wildcard $(ZSTD_FILES))
ZSTD_OBJ1 := $(subst $(ZSTDDIR)/common/,zstdm_,$(ZSTD_F1))
ZSTD_OBJ2 := $(subst $(ZSTDDIR)/compress/,zstdc_,$(ZSTD_OBJ1))
ZSTD_OBJ3 := $(subst $(ZSTDDIR)/decompress/,zstdd_,$(ZSTD_OBJ2))
ZSTD_OBJECTS := $(ZSTD_OBJ3:.c=.o)
ZSTDMT_OBJ1 := $(subst $(ZSTDDIR)/common/,zstdmt_m_,$(ZSTD_F1))
ZSTDMT_OBJ2 := $(subst $(ZSTDDIR)/compress/,zstdmt_c_,$(ZSTDMT_OBJ1))
ZSTDMT_OBJ3 := $(subst $(ZSTDDIR)/decompress/,zstdmt_d_,$(ZSTDMT_OBJ2))
ZSTDMT_OBJECTS := $(ZSTDMT_OBJ3:.c=.o)
# Define *.exe as extension for Windows systems
ifneq (,$(filter Windows%,$(OS)))
@ -63,11 +73,12 @@ FUZZERTEST ?= -T200s
ZSTDRTTEST = --test-large-data
DECODECORPUS_TESTTIME ?= -T30
.PHONY: default all all32 allnothread dll clean test test32 test-all namespaceTest versionsTest
.PHONY: default all all32 allnothread dll clean test test32 test-all versionsTest
default: fullbench
@echo $(ZSTDMT_OBJECTS)
all: fullbench fuzzer zstreamtest paramgrill datagen decodecorpus
all: fullbench fuzzer zstreamtest paramgrill datagen decodecorpus roundTripCrash
all32: fullbench32 fuzzer32 zstreamtest32
@ -87,35 +98,69 @@ zstd-nolegacy:
gzstd:
$(MAKE) -C $(PRGDIR) zstd HAVE_ZLIB=1 MOREFLAGS="$(DEBUGFLAGS)"
.PHONY:
zstd-dll :
$(MAKE) -C $(ZSTDDIR) libzstd
.PHONY:
zstd-staticLib :
$(MAKE) -C $(ZSTDDIR) libzstd.a
zstdm_%.o : $(ZSTDDIR)/common/%.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
zstdc_%.o : $(ZSTDDIR)/compress/%.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
zstdd_%.o : $(ZSTDDIR)/decompress/%.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
zstdmt%.o : CPPFLAGS += $(MULTITHREAD_CPP)
zstdmt_m_%.o : $(ZSTDDIR)/common/%.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
zstdmt_c_%.o : $(ZSTDDIR)/compress/%.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
zstdmt_d_%.o : $(ZSTDDIR)/decompress/%.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@
fullbench32: CPPFLAGS += -m32
fullbench fullbench32 : CPPFLAGS += $(MULTITHREAD_CPP)
fullbench fullbench32 : LDFLAGS += $(MULTITHREAD_LD)
fullbench fullbench32 : DEBUGFLAGS = # turn off assert() for speed measurements
fullbench fullbench32 : $(ZSTD_FILES) $(PRGDIR)/datagen.c fullbench.c
fullbench fullbench32 : $(ZSTD_FILES)
fullbench fullbench32 : $(PRGDIR)/datagen.c fullbench.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
fullbench-lib: $(PRGDIR)/datagen.c fullbench.c
$(MAKE) -C $(ZSTDDIR) libzstd.a
$(CC) $(FLAGS) $^ -o $@$(EXT) $(ZSTDDIR)/libzstd.a
fullbench-lib : zstd-staticLib
fullbench-lib : $(PRGDIR)/datagen.c fullbench.c
$(CC) $(FLAGS) $(filter %.c,$^) -o $@$(EXT) $(ZSTDDIR)/libzstd.a
# note : broken : requires unavailable symbols
fullbench-dll : zstd-dll
fullbench-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
fullbench-dll: $(PRGDIR)/datagen.c fullbench.c
$(MAKE) -C $(ZSTDDIR) libzstd
$(CC) $(FLAGS) $^ -o $@$(EXT) -DZSTD_DLL_IMPORT=1 $(ZSTDDIR)/dll/libzstd.dll
# $(CC) $(FLAGS) $(filter %.c,$^) -o $@$(EXT) -DZSTD_DLL_IMPORT=1 $(ZSTDDIR)/dll/libzstd.dll
$(CC) $(FLAGS) $(filter %.c,$^) -o $@$(EXT)
fuzzer : CPPFLAGS += $(MULTITHREAD_CPP)
fuzzer : LDFLAGS += $(MULTITHREAD_LD)
fuzzer : CPPFLAGS += $(MULTITHREAD_CPP)
fuzzer : LDFLAGS += $(MULTITHREAD_LD)
fuzzer32: CFLAGS += -m32
fuzzer fuzzer32 : $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c fuzzer.c
fuzzer : $(ZSTDMT_OBJECTS)
fuzzer32: $(ZSTD_FILES)
fuzzer fuzzer32 : $(ZDICT_FILES) $(PRGDIR)/datagen.c fuzzer.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
fuzzer-dll : zstd-dll
fuzzer-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
fuzzer-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/datagen.c fuzzer.c
$(MAKE) -C $(ZSTDDIR) libzstd
$(CC) $(CPPFLAGS) $(CFLAGS) $^ $(LDFLAGS) -o $@$(EXT)
$(CC) $(CPPFLAGS) $(CFLAGS) $(filter %.c,$^) $(LDFLAGS) -o $@$(EXT)
zbufftest : CPPFLAGS += -I$(ZSTDDIR)/deprecated
zbufftest : CFLAGS += -Wno-deprecated-declarations # required to silence deprecation warnings
zbufftest : $(ZSTD_FILES) $(ZBUFF_FILES) $(PRGDIR)/datagen.c zbufftest.c
zbufftest : $(ZSTD_OBJECTS) $(ZBUFF_FILES) $(PRGDIR)/datagen.c zbufftest.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
zbufftest32 : CPPFLAGS += -I$(ZSTDDIR)/deprecated
@ -123,18 +168,22 @@ zbufftest32 : CFLAGS += -Wno-deprecated-declarations -m32
zbufftest32 : $(ZSTD_FILES) $(ZBUFF_FILES) $(PRGDIR)/datagen.c zbufftest.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
zbufftest-dll : zstd-dll
zbufftest-dll : CPPFLAGS += -I$(ZSTDDIR)/deprecated
zbufftest-dll : CFLAGS += -Wno-deprecated-declarations # required to silence deprecation warnings
zbufftest-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
zbufftest-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/datagen.c zbufftest.c
$(MAKE) -C $(ZSTDDIR) libzstd
$(CC) $(CPPFLAGS) $(CFLAGS) $^ $(LDFLAGS) -o $@$(EXT)
$(CC) $(CPPFLAGS) $(CFLAGS) $(filter %.c,$^) $(LDFLAGS) -o $@$(EXT)
ZSTREAMFILES := $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c seqgen.c zstreamtest.c
ZSTREAM_LOCAL_FILES := $(PRGDIR)/datagen.c seqgen.c zstreamtest.c
ZSTREAM_PROPER_FILES := $(ZDICT_FILES) $(ZSTREAM_LOCAL_FILES)
ZSTREAMFILES := $(ZSTD_FILES) $(ZSTREAM_PROPER_FILES)
zstreamtest32 : CFLAGS += -m32
zstreamtest zstreamtest32 : CPPFLAGS += $(MULTITHREAD_CPP)
zstreamtest zstreamtest32 : LDFLAGS += $(MULTITHREAD_LD)
zstreamtest zstreamtest32 : $(ZSTREAMFILES)
zstreamtest : $(ZSTDMT_OBJECTS) $(ZSTREAM_PROPER_FILES)
zstreamtest32 : $(ZSTREAMFILES)
zstreamtest zstreamtest32 :
$(CC) $(FLAGS) $^ -o $@$(EXT)
zstreamtest_asan : CFLAGS += -fsanitize=address
@ -145,51 +194,47 @@ zstreamtest_tsan : CFLAGS += -fsanitize=thread
zstreamtest_tsan : $(ZSTREAMFILES)
$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
zstreamtest-dll : zstd-dll
zstreamtest-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
zstreamtest-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/datagen.c zstreamtest.c
$(MAKE) -C $(ZSTDDIR) libzstd
$(CC) $(CPPFLAGS) $(CFLAGS) $^ $(LDFLAGS) -o $@$(EXT)
zstreamtest-dll : $(ZSTDDIR)/common/xxhash.c # xxh symbols not exposed from dll
zstreamtest-dll : $(ZSTREAM_LOCAL_FILES)
$(CC) $(CPPFLAGS) $(CFLAGS) $(filter %.c,$^) $(LDFLAGS) -o $@$(EXT)
paramgrill : DEBUGFLAGS =
paramgrill : DEBUGFLAGS = # turn off assert() for speed measurements
paramgrill : $(ZSTD_FILES) $(PRGDIR)/datagen.c paramgrill.c
$(CC) $(FLAGS) $^ -lm -o $@$(EXT)
$(CC) $(FLAGS) $^ -lm -o $@$(EXT)
datagen : $(PRGDIR)/datagen.c datagencli.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
$(CC) $(FLAGS) $^ -o $@$(EXT)
roundTripCrash : $(ZSTD_FILES) roundTripCrash.c
$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
roundTripCrash : $(ZSTD_OBJECTS) roundTripCrash.c
$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
longmatch : $(ZSTD_FILES) longmatch.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
longmatch : $(ZSTD_OBJECTS) longmatch.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
invalidDictionaries : $(ZSTD_FILES) invalidDictionaries.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
invalidDictionaries : $(ZSTD_OBJECTS) invalidDictionaries.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
legacy : CFLAGS+= -DZSTD_LEGACY_SUPPORT=4
legacy : CPPFLAGS+= -I$(ZSTDDIR)/legacy
legacy : $(ZSTD_FILES) $(wildcard $(ZSTDDIR)/legacy/*.c) legacy.c
$(CC) $(FLAGS) $^ -o $@$(EXT)
$(CC) $(FLAGS) $^ -o $@$(EXT)
decodecorpus : $(filter-out $(ZSTDDIR)/compress/zstd_compress.c, $(wildcard $(ZSTD_FILES))) $(ZDICT_FILES) decodecorpus.c
$(CC) $(FLAGS) $^ -o $@$(EXT) -lm
decodecorpus : $(filter-out zstdc_zstd_compress.o, $(ZSTD_OBJECTS)) $(ZDICT_FILES) decodecorpus.c
$(CC) $(FLAGS) $^ -o $@$(EXT) -lm
symbols : symbols.c
$(MAKE) -C $(ZSTDDIR) libzstd
symbols : symbols.c zstd-dll
ifneq (,$(filter Windows%,$(OS)))
cp $(ZSTDDIR)/dll/libzstd.dll .
$(CC) $(FLAGS) $^ -o $@$(EXT) -DZSTD_DLL_IMPORT=1 libzstd.dll
$(CC) $(FLAGS) $< -o $@$(EXT) -DZSTD_DLL_IMPORT=1 libzstd.dll
else
$(CC) $(FLAGS) $^ -o $@$(EXT) -Wl,-rpath=$(ZSTDDIR) $(ZSTDDIR)/libzstd.so
$(CC) $(FLAGS) $< -o $@$(EXT) -Wl,-rpath=$(ZSTDDIR) $(ZSTDDIR)/libzstd.so # broken on Mac
endif
poolTests : poolTests.c $(ZSTDDIR)/common/pool.c $(ZSTDDIR)/common/threading.c $(ZSTDDIR)/common/zstd_common.c $(ZSTDDIR)/common/error_private.c
$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
namespaceTest:
if $(CC) namespaceTest.c ../lib/common/xxhash.c -o $@ ; then echo compilation should fail; exit 1 ; fi
$(RM) $@
versionsTest: clean
$(PYTHON) test-zstd-versions.py

32
tests/fuzzer.c
View File

@ -65,11 +65,18 @@ static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;
{ g_displayClock = UTIL_getTime(); DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stdout); } }
/*-*******************************************************
* Fuzzer functions
*********************************************************/
#undef MIN
#undef MAX
void FUZ_bug976(void)
{ /* these constants shall not depend on MIN() macro */
assert(ZSTD_HASHLOG_MAX < 31);
assert(ZSTD_CHAINLOG_MAX < 31);
}
/*-*******************************************************
* Internal functions
*********************************************************/
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))
@ -658,12 +665,13 @@ static int basicUnitTests(U32 seed, double compressibility)
/* Dictionary and dictBuilder tests */
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t dictSize = 16 KB;
void* dictBuffer = malloc(dictSize);
size_t const dictBufferCapacity = 16 KB;
void* dictBuffer = malloc(dictBufferCapacity);
size_t const totalSampleSize = 1 MB;
size_t const sampleUnitSize = 8 KB;
U32 const nbSamples = (U32)(totalSampleSize / sampleUnitSize);
size_t* const samplesSizes = (size_t*) malloc(nbSamples * sizeof(size_t));
size_t dictSize;
U32 dictID;
if (dictBuffer==NULL || samplesSizes==NULL) {
@ -672,9 +680,19 @@ static int basicUnitTests(U32 seed, double compressibility)
goto _output_error;
}
DISPLAYLEVEL(3, "test%3i : dictBuilder on cyclic data : ", testNb++);
assert(compressedBufferSize >= totalSampleSize);
{ U32 u; for (u=0; u<totalSampleSize; u++) ((BYTE*)decodedBuffer)[u] = (BYTE)u; }
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
{ size_t const sDictSize = ZDICT_trainFromBuffer(dictBuffer, dictBufferCapacity,
decodedBuffer, samplesSizes, nbSamples);
if (ZDICT_isError(sDictSize)) goto _output_error;
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (U32)sDictSize);
}
DISPLAYLEVEL(3, "test%3i : dictBuilder : ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
dictSize = ZDICT_trainFromBuffer(dictBuffer, dictSize,
dictSize = ZDICT_trainFromBuffer(dictBuffer, dictBufferCapacity,
CNBuffer, samplesSizes, nbSamples);
if (ZDICT_isError(dictSize)) goto _output_error;
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (U32)dictSize);
@ -1415,7 +1433,7 @@ static int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, U32 const maxD
size_t const skipLength = FUZ_rand(&lseed) & mask;
pos += skipLength;
}
if (pos <= cSize) break;
if (pos >= cSize) break;
/* add noise */
{ U32 const nbBitsCodes = FUZ_rand(&lseed) % maxNbBits;
U32 const nbBits = nbBitsCodes ? nbBitsCodes-1 : 0;

24
tests/namespaceTest.c
View File

@ -1,24 +0,0 @@
/*
* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
#include <stddef.h> /* size_t */
#include <string.h> /* strlen */
/* symbol definition */
extern unsigned XXH32(const void* src, size_t srcSize, unsigned seed);
int main(int argc, const char** argv)
{
const char* exename = argv[0];
unsigned result = XXH32(exename, strlen(exename), argc);
return !result;
}