* Copyright (c) Meta Platforms, Inc. and affiliates.

/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
* 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.
*/

/*-************************************
* Compiler specific
**************************************/
#ifdef _MSC_VER /* Visual Studio */
# define _CRT_SECURE_NO_WARNINGS /* fgets */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
# pragma warning(disable : 4204) /* disable: C4204: non-constant aggregate initializer */
#endif

/*-************************************
* Includes
**************************************/
#include <stdlib.h> /* free */
#include <stdio.h> /* fgets, sscanf */
#include <string.h> /* strcmp */
#include <time.h> /* time(), time_t */
#undef NDEBUG /* always enable assert() */
#include <assert.h>
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_compressContinue, ZSTD_compressBlock */
#include "debug.h" /* DEBUG_STATIC_ASSERT */
#include "fse.h"
#define ZSTD_DISABLE_DEPRECATE_WARNINGS /* No deprecation warnings, we still test some deprecated functions */
#include "zstd.h" /* ZSTD_VERSION_STRING */
#include "zstd_errors.h" /* ZSTD_getErrorCode */
#define ZDICT_STATIC_LINKING_ONLY
#include "zdict.h" /* ZDICT_trainFromBuffer */
#include "mem.h"
#include "datagen.h" /* RDG_genBuffer */
#define XXH_STATIC_LINKING_ONLY /* XXH64_state_t */
#include "xxhash.h" /* XXH64 */
#include "util.h"
#include "timefn.h" /* SEC_TO_MICRO, UTIL_time_t, UTIL_TIME_INITIALIZER, UTIL_clockSpanMicro, UTIL_getTime */
/* must be included after util.h, due to ERROR macro redefinition issue on Visual Studio */
#include "zstd_internal.h" /* ZSTD_WORKSPACETOOLARGE_MAXDURATION, ZSTD_WORKSPACETOOLARGE_FACTOR, KB, MB */
#include "threading.h" /* ZSTD_pthread_create, ZSTD_pthread_join */

/*-************************************
* Constants
**************************************/
#define GB *(1U<<30)

static const int FUZ_compressibility_default = 50;
static const int nbTestsDefault = 30000;

/*-************************************
* Display Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static U32 g_displayLevel = 2;

static const U64 g_refreshRate = SEC_TO_MICRO / 6;
static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;

#define DISPLAYUPDATE(l, ...) \
if (g_displayLevel>=l) { \
if ((UTIL_clockSpanMicro(g_displayClock) > g_refreshRate) || (g_displayLevel>=4)) \
{ g_displayClock = UTIL_getTime(); DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stderr); } \
}

/*-*******************************************************
* Compile time test
*********************************************************/
#undef MIN
#undef MAX
/* Declaring the function, to avoid -Wmissing-prototype */
void FUZ_bug976(void);
void FUZ_bug976(void)
{ /* these constants shall not depend on MIN() macro */
DEBUG_STATIC_ASSERT(ZSTD_HASHLOG_MAX < 31);
DEBUG_STATIC_ASSERT(ZSTD_CHAINLOG_MAX < 31);
}

/*-*******************************************************
* Internal functions
*********************************************************/
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))

#define FUZ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
static U32 FUZ_rand(U32* src)
{
static const U32 prime1 = 2654435761U;
static const U32 prime2 = 2246822519U;
U32 rand32 = *src;
rand32 *= prime1;
rand32 += prime2;
rand32 = FUZ_rotl32(rand32, 13);
*src = rand32;
return rand32 >> 5;
}

static U32 FUZ_highbit32(U32 v32)
{
unsigned nbBits = 0;
if (v32==0) return 0;
while (v32) v32 >>= 1, nbBits++;
return nbBits;
}

/*=============================================
* Test macros
=============================================*/
#define CHECK(fn) { if(!(fn)) { DISPLAYLEVEL(1, "Error : test (%s) failed \n", #fn); exit(1); } }

#define CHECK_Z(f) { \
size_t const err = f; \
if (ZSTD_isError(err)) { \
DISPLAY("Error => %s : %s ", \
#f, ZSTD_getErrorName(err)); \
exit(1); \
} }

#define CHECK_VAR(var, fn) var = fn; if (ZSTD_isError(var)) { DISPLAYLEVEL(1, "%s : fails : %s \n", #fn, ZSTD_getErrorName(var)); exit(1); }
#define CHECK_NEWV(var, fn) size_t const CHECK_VAR(var, fn)
#define CHECKPLUS(var, fn, more) { CHECK_NEWV(var, fn); more; }

#define CHECK_OP(op, lhs, rhs) { \
if (!((lhs) op (rhs))) { \
DISPLAY("Error L%u => FAILED %s %s %s ", __LINE__, #lhs, #op, #rhs); \
exit(1); \
} \
}
#define CHECK_EQ(lhs, rhs) CHECK_OP(==, lhs, rhs)
#define CHECK_LT(lhs, rhs) CHECK_OP(<, lhs, rhs)

/*=============================================
* Memory Tests
=============================================*/
#if defined(__APPLE__) && defined(__MACH__)

#include <malloc/malloc.h> /* malloc_size */

typedef struct {
unsigned long long totalMalloc;
size_t currentMalloc;
size_t peakMalloc;
unsigned nbMalloc;
unsigned nbFree;
} mallocCounter_t;

static const mallocCounter_t INIT_MALLOC_COUNTER = { 0, 0, 0, 0, 0 };

static void* FUZ_mallocDebug(void* counter, size_t size)
{
mallocCounter_t* const mcPtr = (mallocCounter_t*)counter;
void* const ptr = malloc(size);
if (ptr==NULL) return NULL;
DISPLAYLEVEL(4, "allocating %u KB => effectively %u KB \n",
(unsigned)(size >> 10), (unsigned)(malloc_size(ptr) >> 10)); /* OS-X specific */
mcPtr->totalMalloc += size;
mcPtr->currentMalloc += size;
if (mcPtr->currentMalloc > mcPtr->peakMalloc)
mcPtr->peakMalloc = mcPtr->currentMalloc;
mcPtr->nbMalloc += 1;
return ptr;
}

static void FUZ_freeDebug(void* counter, void* address)
{
mallocCounter_t* const mcPtr = (mallocCounter_t*)counter;
DISPLAYLEVEL(4, "freeing %u KB \n", (unsigned)(malloc_size(address) >> 10));
mcPtr->nbFree += 1;
mcPtr->currentMalloc -= malloc_size(address); /* OS-X specific */
free(address);
}

static void FUZ_displayMallocStats(mallocCounter_t count)
{
DISPLAYLEVEL(3, "peak:%6u KB, nbMallocs:%2u, total:%6u KB \n",
(unsigned)(count.peakMalloc >> 10),
count.nbMalloc,
(unsigned)(count.totalMalloc >> 10));
}

static int FUZ_mallocTests_internal(unsigned seed, double compressibility, unsigned part,
void* inBuffer, size_t inSize, void* outBuffer, size_t outSize)
{
/* test only played in verbose mode, as they are long */
if (g_displayLevel<3) return 0;

/* Create compressible noise */
if (!inBuffer || !outBuffer) {
DISPLAY("Not enough memory, aborting\n");
exit(1);
}
RDG_genBuffer(inBuffer, inSize, compressibility, 0. /*auto*/, seed);

/* simple compression tests */
if (part <= 1)
{ int compressionLevel;
for (compressionLevel=1; compressionLevel<=6; compressionLevel++) {
mallocCounter_t malcount = INIT_MALLOC_COUNTER;
ZSTD_customMem const cMem = { FUZ_mallocDebug, FUZ_freeDebug, &malcount };
ZSTD_CCtx* const cctx = ZSTD_createCCtx_advanced(cMem);
CHECK_Z( ZSTD_compressCCtx(cctx, outBuffer, outSize, inBuffer, inSize, compressionLevel) );
ZSTD_freeCCtx(cctx);
DISPLAYLEVEL(3, "compressCCtx level %i : ", compressionLevel);
FUZ_displayMallocStats(malcount);
} }

/* streaming compression tests */
if (part <= 2)
{ int compressionLevel;
for (compressionLevel=1; compressionLevel<=6; compressionLevel++) {
mallocCounter_t malcount = INIT_MALLOC_COUNTER;
ZSTD_customMem const cMem = { FUZ_mallocDebug, FUZ_freeDebug, &malcount };
ZSTD_CCtx* const cstream = ZSTD_createCStream_advanced(cMem);
ZSTD_outBuffer out = { outBuffer, outSize, 0 };
ZSTD_inBuffer in = { inBuffer, inSize, 0 };
CHECK_Z( ZSTD_initCStream(cstream, compressionLevel) );
CHECK_Z( ZSTD_compressStream(cstream, &out, &in) );
CHECK_Z( ZSTD_endStream(cstream, &out) );
ZSTD_freeCStream(cstream);
DISPLAYLEVEL(3, "compressStream level %i : ", compressionLevel);
FUZ_displayMallocStats(malcount);
} }

/* advanced MT API test */
if (part <= 3)
{ int nbThreads;
for (nbThreads=1; nbThreads<=4; nbThreads++) {
int compressionLevel;
for (compressionLevel=1; compressionLevel<=6; compressionLevel++) {
mallocCounter_t malcount = INIT_MALLOC_COUNTER;
ZSTD_customMem const cMem = { FUZ_mallocDebug, FUZ_freeDebug, &malcount };
ZSTD_CCtx* const cctx = ZSTD_createCCtx_advanced(cMem);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, compressionLevel) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, nbThreads) );
CHECK_Z( ZSTD_compress2(cctx, outBuffer, outSize, inBuffer, inSize) );
ZSTD_freeCCtx(cctx);
DISPLAYLEVEL(3, "compress_generic,-T%i,end level %i : ",
nbThreads, compressionLevel);
FUZ_displayMallocStats(malcount);
} } }

/* advanced MT streaming API test */
if (part <= 4)
{ int nbThreads;
for (nbThreads=1; nbThreads<=4; nbThreads++) {
int compressionLevel;
for (compressionLevel=1; compressionLevel<=6; compressionLevel++) {
mallocCounter_t malcount = INIT_MALLOC_COUNTER;
ZSTD_customMem const cMem = { FUZ_mallocDebug, FUZ_freeDebug, &malcount };
ZSTD_CCtx* const cctx = ZSTD_createCCtx_advanced(cMem);
ZSTD_outBuffer out = { outBuffer, outSize, 0 };
ZSTD_inBuffer in = { inBuffer, inSize, 0 };
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, compressionLevel) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, nbThreads) );
CHECK_Z( ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_continue) );
while ( ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end) ) {}
ZSTD_freeCCtx(cctx);
DISPLAYLEVEL(3, "compress_generic,-T%i,continue level %i : ",
nbThreads, compressionLevel);
FUZ_displayMallocStats(malcount);
} } }

return 0;
}

static int FUZ_mallocTests(unsigned seed, double compressibility, unsigned part)
{
size_t const inSize = 64 MB + 16 MB + 4 MB + 1 MB + 256 KB + 64 KB; /* 85.3 MB */
size_t const outSize = ZSTD_compressBound(inSize);
void* const inBuffer = malloc(inSize);
void* const outBuffer = malloc(outSize);
int result;

/* Create compressible noise */
if (!inBuffer || !outBuffer) {
DISPLAY("Not enough memory, aborting \n");
exit(1);
}

result = FUZ_mallocTests_internal(seed, compressibility, part,
inBuffer, inSize, outBuffer, outSize);

free(inBuffer);
free(outBuffer);
return result;
}

#else

static int FUZ_mallocTests(unsigned seed, double compressibility, unsigned part)
{
(void)seed; (void)compressibility; (void)part;
return 0;
}

#endif

static void FUZ_decodeSequences(BYTE* dst, ZSTD_Sequence* seqs, size_t seqsSize,
BYTE* src, size_t size, ZSTD_sequenceFormat_e format)
{
size_t i;
size_t j;
for(i = 0; i < seqsSize; ++i) {
assert(dst + seqs[i].litLength + seqs[i].matchLength <= dst + size);
assert(src + seqs[i].litLength + seqs[i].matchLength <= src + size);
if (format == ZSTD_sf_noBlockDelimiters) {
assert(seqs[i].matchLength != 0 || seqs[i].offset != 0);
}

memcpy(dst, src, seqs[i].litLength);
dst += seqs[i].litLength;
src += seqs[i].litLength;
size -= seqs[i].litLength;

if (seqs[i].offset != 0) {
for (j = 0; j < seqs[i].matchLength; ++j)
dst[j] = dst[(ptrdiff_t)(j - seqs[i].offset)];
dst += seqs[i].matchLength;
src += seqs[i].matchLength;
size -= seqs[i].matchLength;
}
}
if (format == ZSTD_sf_noBlockDelimiters) {
memcpy(dst, src, size);
}
}

#ifdef ZSTD_MULTITHREAD

typedef struct {
ZSTD_CCtx* cctx;
ZSTD_threadPool* pool;
void* CNBuffer;
size_t CNBuffSize;
void* compressedBuffer;
size_t compressedBufferSize;
void* decodedBuffer;
int err;
} threadPoolTests_compressionJob_payload;

static void* threadPoolTests_compressionJob(void* payload) {
threadPoolTests_compressionJob_payload* args = (threadPoolTests_compressionJob_payload*)payload;
size_t cSize;
if (ZSTD_isError(ZSTD_CCtx_refThreadPool(args->cctx, args->pool))) args->err = 1;
cSize = ZSTD_compress2(args->cctx, args->compressedBuffer, args->compressedBufferSize, args->CNBuffer, args->CNBuffSize);
if (ZSTD_isError(cSize)) args->err = 1;
if (ZSTD_isError(ZSTD_decompress(args->decodedBuffer, args->CNBuffSize, args->compressedBuffer, cSize))) args->err = 1;
return payload;
}

static int threadPoolTests(void) {
int testResult = 0;
size_t err;

size_t const CNBuffSize = 5 MB;
void* const CNBuffer = malloc(CNBuffSize);
size_t const compressedBufferSize = ZSTD_compressBound(CNBuffSize);
void* const compressedBuffer = malloc(compressedBufferSize);
void* const decodedBuffer = malloc(CNBuffSize);

size_t const kPoolNumThreads = 8;

RDG_genBuffer(CNBuffer, CNBuffSize, 0.5, 0.5, 0);

DISPLAYLEVEL(3, "thread pool test : threadPool reuse roundtrips: ");
{
ZSTD_CCtx* cctx = ZSTD_createCCtx();
ZSTD_threadPool* pool = ZSTD_createThreadPool(kPoolNumThreads);

size_t nbThreads = 1;
for (; nbThreads <= kPoolNumThreads; ++nbThreads) {
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, (int)nbThreads);
err = ZSTD_CCtx_refThreadPool(cctx, pool);
if (ZSTD_isError(err)) {
DISPLAYLEVEL(3, "refThreadPool error!\n");
ZSTD_freeCCtx(cctx);
goto _output_error;
}
err = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
if (ZSTD_isError(err)) {
DISPLAYLEVEL(3, "Compression error!\n");
ZSTD_freeCCtx(cctx);
goto _output_error;
}
err = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, err);
if (ZSTD_isError(err)) {
DISPLAYLEVEL(3, "Decompression error!\n");
ZSTD_freeCCtx(cctx);
goto _output_error;
}
}

ZSTD_freeCCtx(cctx);
ZSTD_freeThreadPool(pool);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "thread pool test : threadPool simultaneous usage: ");
{
void* const decodedBuffer2 = malloc(CNBuffSize);
void* const compressedBuffer2 = malloc(compressedBufferSize);
ZSTD_threadPool* pool = ZSTD_createThreadPool(kPoolNumThreads);
ZSTD_CCtx* cctx1 = ZSTD_createCCtx();
ZSTD_CCtx* cctx2 = ZSTD_createCCtx();

ZSTD_pthread_t t1;
ZSTD_pthread_t t2;
threadPoolTests_compressionJob_payload p1 = {cctx1, pool, CNBuffer, CNBuffSize,
compressedBuffer, compressedBufferSize, decodedBuffer, 0 /* err */};
threadPoolTests_compressionJob_payload p2 = {cctx2, pool, CNBuffer, CNBuffSize,
compressedBuffer2, compressedBufferSize, decodedBuffer2, 0 /* err */};

ZSTD_CCtx_setParameter(cctx1, ZSTD_c_nbWorkers, 2);
ZSTD_CCtx_setParameter(cctx2, ZSTD_c_nbWorkers, 2);
ZSTD_CCtx_refThreadPool(cctx1, pool);
ZSTD_CCtx_refThreadPool(cctx2, pool);

ZSTD_pthread_create(&t1, NULL, threadPoolTests_compressionJob, &p1);
ZSTD_pthread_create(&t2, NULL, threadPoolTests_compressionJob, &p2);
ZSTD_pthread_join(t1);
ZSTD_pthread_join(t2);

assert(!memcmp(decodedBuffer, decodedBuffer2, CNBuffSize));
free(decodedBuffer2);
free(compressedBuffer2);

ZSTD_freeThreadPool(pool);
ZSTD_freeCCtx(cctx1);
ZSTD_freeCCtx(cctx2);

if (p1.err || p2.err) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

_end:
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
return testResult;

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

/*=============================================
* Unit tests
=============================================*/

static void test_compressBound(unsigned tnb)
{
DISPLAYLEVEL(3, "test%3u : compressBound : ", tnb);

/* check ZSTD_compressBound == ZSTD_COMPRESSBOUND
* for a large range of known valid values */
DEBUG_STATIC_ASSERT(sizeof(size_t) >= 4);
{ int s;
for (s=0; s<30; s++) {
size_t const w = (size_t)1 << s;
CHECK_EQ(ZSTD_compressBound(w), ZSTD_COMPRESSBOUND(w));
} }

/* Ensure error if srcSize too big */
{ size_t const w = ZSTD_MAX_INPUT_SIZE + 1;
CHECK(ZSTD_isError(ZSTD_compressBound(w))); /* must fail */
CHECK_EQ(ZSTD_COMPRESSBOUND(w), 0);
}

DISPLAYLEVEL(3, "OK \n");
}

static void test_decompressBound(unsigned tnb)
{
DISPLAYLEVEL(3, "test%3u : decompressBound : ", tnb);

/* Simple compression, with size : should provide size; */
{ const char example[] = "abcd";
char cBuffer[ZSTD_COMPRESSBOUND(sizeof(example))];
size_t const cSize = ZSTD_compress(cBuffer, sizeof(cBuffer), example, sizeof(example), 0);
CHECK_Z(cSize);
CHECK_EQ(ZSTD_decompressBound(cBuffer, cSize), (unsigned long long)sizeof(example));
}

/* Simple small compression without size : should provide 1 block size */
{ char cBuffer[ZSTD_COMPRESSBOUND(0)];
ZSTD_outBuffer out = { cBuffer, sizeof(cBuffer), 0 };
ZSTD_inBuffer in = { NULL, 0, 0 };
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
assert(cctx);
CHECK_Z( ZSTD_initCStream(cctx, 0) );
CHECK_Z( ZSTD_compressStream(cctx, &out, &in) );
CHECK_EQ( ZSTD_endStream(cctx, &out), 0 );
CHECK_EQ( ZSTD_decompressBound(cBuffer, out.pos), ZSTD_BLOCKSIZE_MAX );
ZSTD_freeCCtx(cctx);
}

/* Attempt to overflow 32-bit intermediate multiplication result
* This requires dBound >= 4 GB, aka 2^32.
* This requires 2^32 / 2^17 = 2^15 blocks
* => create 2^15 blocks (can be empty, or just 1 byte). */
{ const char input[] = "a";
size_t const nbBlocks = (1 << 15) + 1;
size_t blockNb;
size_t const outCapacity = 1 << 18; /* large margin */
char* const outBuffer = malloc (outCapacity);
ZSTD_outBuffer out = { outBuffer, outCapacity, 0 };
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
assert(cctx);
assert(outBuffer);
CHECK_Z( ZSTD_initCStream(cctx, 0) );
for (blockNb=0; blockNb<nbBlocks; blockNb++) {
ZSTD_inBuffer in = { input, sizeof(input), 0 };
CHECK_Z( ZSTD_compressStream(cctx, &out, &in) );
CHECK_EQ( ZSTD_flushStream(cctx, &out), 0 );
}
CHECK_EQ( ZSTD_endStream(cctx, &out), 0 );
CHECK( ZSTD_decompressBound(outBuffer, out.pos) > 0x100000000ULL /* 4 GB */ );
ZSTD_freeCCtx(cctx);
free(outBuffer);
}

DISPLAYLEVEL(3, "OK \n");
}

static void test_setCParams(unsigned tnb)
{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_compressionParameters cparams;
assert(cctx);

DISPLAYLEVEL(3, "test%3u : ZSTD_CCtx_setCParams : ", tnb);

/* valid cparams */
cparams = ZSTD_getCParams(1, 0, 0);
CHECK_Z(ZSTD_CCtx_setCParams(cctx, cparams));

/* invalid cparams (must fail) */
cparams.windowLog = 99;
CHECK(ZSTD_isError(ZSTD_CCtx_setCParams(cctx, cparams)));

free(cctx);
DISPLAYLEVEL(3, "OK \n");
}

static int basicUnitTests(U32 const seed, double compressibility)
{
size_t const CNBuffSize = 5 MB;
void* const CNBuffer = malloc(CNBuffSize);
size_t const compressedBufferSize = ZSTD_compressBound(CNBuffSize);
void* const compressedBuffer = malloc(compressedBufferSize);
void* const decodedBuffer = malloc(CNBuffSize);
int testResult = 0;
unsigned testNb=0;
size_t cSize;

/* Create compressible noise */
if (!CNBuffer || !compressedBuffer || !decodedBuffer) {
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}
RDG_genBuffer(CNBuffer, CNBuffSize, compressibility, 0., seed);

/* Basic tests */
DISPLAYLEVEL(3, "test%3u : ZSTD_getErrorName : ", testNb++);
{ const char* errorString = ZSTD_getErrorName(0);
DISPLAYLEVEL(3, "OK : %s \n", errorString);
}

DISPLAYLEVEL(3, "test%3u : ZSTD_getErrorName with wrong value : ", testNb++);
{ const char* errorString = ZSTD_getErrorName(499);
DISPLAYLEVEL(3, "OK : %s \n", errorString);
}

DISPLAYLEVEL(3, "test%3u : min compression level : ", testNb++);
{ int const mcl = ZSTD_minCLevel();
DISPLAYLEVEL(3, "%i (OK) \n", mcl);
}

DISPLAYLEVEL(3, "test%3u : default compression level : ", testNb++);
{ int const defaultCLevel = ZSTD_defaultCLevel();
if (defaultCLevel != ZSTD_CLEVEL_DEFAULT) goto _output_error;
DISPLAYLEVEL(3, "%i (OK) \n", defaultCLevel);
}

DISPLAYLEVEL(3, "test%3u : ZSTD_versionNumber : ", testNb++);
{ unsigned const vn = ZSTD_versionNumber();
DISPLAYLEVEL(3, "%u (OK) \n", vn);
}

test_compressBound(testNb++);

test_decompressBound(testNb++);

test_setCParams(testNb++);

DISPLAYLEVEL(3, "test%3u : ZSTD_adjustCParams : ", testNb++);
{
ZSTD_compressionParameters params;
memset(&params, 0, sizeof(params));
params.windowLog = 10;
params.hashLog = 19;
params.chainLog = 19;
params = ZSTD_adjustCParams(params, 1000, 100000);
if (params.hashLog != 18) goto _output_error;
if (params.chainLog != 17) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3u : compress %u bytes : ", testNb++, (unsigned)CNBuffSize);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
if (cctx==NULL) goto _output_error;
CHECK_VAR(cSize, ZSTD_compressCCtx(cctx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 1) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : size of cctx for level 1 : ", testNb++);
{ size_t const cctxSize = ZSTD_sizeof_CCtx(cctx);
DISPLAYLEVEL(3, "%u bytes \n", (unsigned)cctxSize);
}
ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3i : decompress skippable frame -8 size : ", testNb++);
{
char const skippable8[] = "\x50\x2a\x4d\x18\xf8\xff\xff\xff";
size_t const size = ZSTD_decompress(NULL, 0, skippable8, 8);
if (!ZSTD_isError(size)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_getFrameContentSize test : ", testNb++);
{ unsigned long long const rSize = ZSTD_getFrameContentSize(compressedBuffer, cSize);
if (rSize != CNBuffSize) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_getDecompressedSize test : ", testNb++);
{ unsigned long long const rSize = ZSTD_getDecompressedSize(compressedBuffer, cSize);
if (rSize != CNBuffSize) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_findDecompressedSize test : ", testNb++);
{ unsigned long long const rSize = ZSTD_findDecompressedSize(compressedBuffer, cSize);
if (rSize != CNBuffSize) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : tight ZSTD_decompressBound test : ", testNb++);
{
unsigned long long bound = ZSTD_decompressBound(compressedBuffer, cSize);
if (bound != CNBuffSize) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_decompressBound test with invalid srcSize : ", testNb++);
{
unsigned long long bound = ZSTD_decompressBound(compressedBuffer, cSize - 1);
if (bound != ZSTD_CONTENTSIZE_ERROR) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress %u bytes : ", testNb++, (unsigned)CNBuffSize);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress %u bytes with Huffman assembly disabled : ", testNb++, (unsigned)CNBuffSize);
{
ZSTD_DCtx* dctx = ZSTD_createDCtx();
size_t r;
CHECK_Z(ZSTD_DCtx_setParameter(dctx, ZSTD_d_disableHuffmanAssembly, 1));
r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (r != CNBuffSize || memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : check decompressed result : ", testNb++);
{ size_t u;
for (u=0; u<CNBuffSize; u++) {
if (((BYTE*)decodedBuffer)[u] != ((BYTE*)CNBuffer)[u]) goto _output_error;
} }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3u : invalid endDirective : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_inBuffer inb = { CNBuffer, CNBuffSize, 0 };
ZSTD_outBuffer outb = { compressedBuffer, compressedBufferSize, 0 };
if (cctx==NULL) goto _output_error;
CHECK( ZSTD_isError( ZSTD_compressStream2(cctx, &outb, &inb, (ZSTD_EndDirective) 3) ) ); /* must fail */
CHECK( ZSTD_isError( ZSTD_compressStream2(cctx, &outb, &inb, (ZSTD_EndDirective)-1) ) ); /* must fail */
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_checkCParams : ", testNb++);
{
ZSTD_parameters params = ZSTD_getParams(3, 0, 0);
assert(!ZSTD_checkCParams(params.cParams));
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_createDCtx_advanced and ZSTD_sizeof_DCtx: ", testNb++);
{
ZSTD_DCtx* const dctx = ZSTD_createDCtx_advanced(ZSTD_defaultCMem);
assert(dctx != NULL);
assert(ZSTD_sizeof_DCtx(dctx) != 0);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : misc unaccounted for zstd symbols : ", testNb++);
{
/* %p takes a void*. In ISO C, it's illegal to cast a function pointer
* to a data pointer. (Although in POSIX you're required to be allowed
* to do it...) So we have to fall back to our trusty friend memcpy. */
unsigned (* const funcptr_getDictID)(const ZSTD_DDict* ddict) =
ZSTD_getDictID_fromDDict;
ZSTD_DStream* (* const funcptr_createDStream)(
ZSTD_customMem customMem) = ZSTD_createDStream_advanced;
void (* const funcptr_copyDCtx)(
ZSTD_DCtx* dctx, const ZSTD_DCtx* preparedDCtx) = ZSTD_copyDCtx;
ZSTD_nextInputType_e (* const funcptr_nextInputType)(ZSTD_DCtx* dctx) =
ZSTD_nextInputType;
const void *voidptr_getDictID;
const void *voidptr_createDStream;
const void *voidptr_copyDCtx;
const void *voidptr_nextInputType;
DEBUG_STATIC_ASSERT(sizeof(funcptr_getDictID) == sizeof(voidptr_getDictID));
memcpy(
(void*)&voidptr_getDictID,
(const void*)&funcptr_getDictID,
sizeof(void*));
memcpy(
(void*)&voidptr_createDStream,
(const void*)&funcptr_createDStream,
sizeof(void*));
memcpy(
(void*)&voidptr_copyDCtx,
(const void*)&funcptr_copyDCtx,
sizeof(void*));
memcpy(
(void*)&voidptr_nextInputType,
(const void*)&funcptr_nextInputType,
sizeof(void*));
DISPLAYLEVEL(3, "%p ", voidptr_getDictID);
DISPLAYLEVEL(3, "%p ", voidptr_createDStream);
DISPLAYLEVEL(3, "%p ", voidptr_copyDCtx);
DISPLAYLEVEL(3, "%p ", voidptr_nextInputType);
}
DISPLAYLEVEL(3, ": OK \n");

DISPLAYLEVEL(3, "test%3i : decompress with null dict : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx(); assert(dctx != NULL);
{ size_t const r = ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
NULL, 0);
if (r != CNBuffSize) goto _output_error;
}
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress with null DDict : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx(); assert(dctx != NULL);
{ size_t const r = ZSTD_decompress_usingDDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
NULL);
if (r != CNBuffSize) goto _output_error;
}
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress with 1 missing byte : ", testNb++);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize-1);
if (!ZSTD_isError(r)) goto _output_error;
if (ZSTD_getErrorCode((size_t)r) != ZSTD_error_srcSize_wrong) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress with 1 too much byte : ", testNb++);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize+1);
if (!ZSTD_isError(r)) goto _output_error;
if (ZSTD_getErrorCode(r) != ZSTD_error_srcSize_wrong) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress too large input : ", testNb++);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, compressedBufferSize);
if (!ZSTD_isError(r)) goto _output_error;
if (ZSTD_getErrorCode(r) != ZSTD_error_srcSize_wrong) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress into NULL buffer : ", testNb++);
{ size_t const r = ZSTD_decompress(NULL, 0, compressedBuffer, compressedBufferSize);
if (!ZSTD_isError(r)) goto _output_error;
if (ZSTD_getErrorCode(r) != ZSTD_error_dstSize_tooSmall) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress with corrupted checksum : ", testNb++);
{ /* create compressed buffer with checksumming enabled */
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
if (!cctx) {
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1) );
CHECK_VAR(cSize, ZSTD_compress2(cctx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize) );
ZSTD_freeCCtx(cctx);
}
{ /* copy the compressed buffer and corrupt the checksum */
size_t r;
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
if (!dctx) {
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}

((char*)compressedBuffer)[cSize-1] += 1;
r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (!ZSTD_isError(r)) goto _output_error;
if (ZSTD_getErrorCode(r) != ZSTD_error_checksum_wrong) goto _output_error;

CHECK_Z(ZSTD_DCtx_setParameter(dctx, ZSTD_d_forceIgnoreChecksum, ZSTD_d_ignoreChecksum));
r = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize-1);
if (!ZSTD_isError(r)) goto _output_error; /* wrong checksum size should still throw error */
r = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (ZSTD_isError(r)) goto _output_error;

ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_decompressBound test with content size missing : ", testNb++);
{ /* create compressed buffer with content size missing */
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_contentSizeFlag, 0) );
CHECK_VAR(cSize, ZSTD_compress2(cctx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize) );
ZSTD_freeCCtx(cctx);
}
{ /* ensure frame content size is missing */
ZSTD_frameHeader zfh;
size_t const ret = ZSTD_getFrameHeader(&zfh, compressedBuffer, compressedBufferSize);
if (ret != 0 || zfh.frameContentSize != ZSTD_CONTENTSIZE_UNKNOWN) goto _output_error;
}
{ /* ensure CNBuffSize <= decompressBound */
unsigned long long const bound = ZSTD_decompressBound(compressedBuffer, compressedBufferSize);
if (CNBuffSize > bound) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d: check DCtx size is reduced after many oversized calls : ", testNb++);
{
size_t const largeFrameSrcSize = 200;
size_t const smallFrameSrcSize = 10;
size_t const nbFrames = 256;

size_t i = 0, consumed = 0, produced = 0, prevDCtxSize = 0;
int sizeReduced = 0;

BYTE* const dst = (BYTE*)compressedBuffer;
ZSTD_DCtx* dctx = ZSTD_createDCtx();

/* create a large frame and then a bunch of small frames */
size_t srcSize = ZSTD_compress((void*)dst,
compressedBufferSize, CNBuffer, largeFrameSrcSize, 3);
for (i = 0; i < nbFrames; i++)
srcSize += ZSTD_compress((void*)(dst + srcSize),
compressedBufferSize - srcSize, CNBuffer,
smallFrameSrcSize, 3);

/* decompressStream and make sure that dctx size was reduced at least once */
while (consumed < srcSize) {
ZSTD_inBuffer in = {(void*)(dst + consumed), MIN(1, srcSize - consumed), 0};
ZSTD_outBuffer out = {(BYTE*)CNBuffer + produced, CNBuffSize - produced, 0};
ZSTD_decompressStream(dctx, &out, &in);
consumed += in.pos;
produced += out.pos;

/* success! size was reduced from the previous frame */
if (prevDCtxSize > ZSTD_sizeof_DCtx(dctx))
sizeReduced = 1;

prevDCtxSize = ZSTD_sizeof_DCtx(dctx);
}

assert(sizeReduced);

ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_CDict* const cdict = ZSTD_createCDict(CNBuffer, 100, 1);
ZSTD_parameters const params = ZSTD_getParams(1, 0, 0);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_format, ZSTD_f_zstd1_magicless) );

DISPLAYLEVEL(3, "test%3i : ZSTD_compressCCtx() doesn't use advanced parameters", testNb++);
CHECK_Z(ZSTD_compressCCtx(cctx, compressedBuffer, compressedBufferSize, NULL, 0, 1));
if (MEM_readLE32(compressedBuffer) != ZSTD_MAGICNUMBER) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_compress_usingDict() doesn't use advanced parameters: ", testNb++);
CHECK_Z(ZSTD_compress_usingDict(cctx, compressedBuffer, compressedBufferSize, NULL, 0, NULL, 0, 1));
if (MEM_readLE32(compressedBuffer) != ZSTD_MAGICNUMBER) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_compress_usingCDict() doesn't use advanced parameters: ", testNb++);
CHECK_Z(ZSTD_compress_usingCDict(cctx, compressedBuffer, compressedBufferSize, NULL, 0, cdict));
if (MEM_readLE32(compressedBuffer) != ZSTD_MAGICNUMBER) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_compress_advanced() doesn't use advanced parameters: ", testNb++);
CHECK_Z(ZSTD_compress_advanced(cctx, compressedBuffer, compressedBufferSize, NULL, 0, NULL, 0, params));
if (MEM_readLE32(compressedBuffer) != ZSTD_MAGICNUMBER) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_compress_usingCDict_advanced() doesn't use advanced parameters: ", testNb++);
CHECK_Z(ZSTD_compress_usingCDict_advanced(cctx, compressedBuffer, compressedBufferSize, NULL, 0, cdict, params.fParams));
if (MEM_readLE32(compressedBuffer) != ZSTD_MAGICNUMBER) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

ZSTD_freeCDict(cdict);
ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3i : maxBlockSize = 2K", testNb++);
{
ZSTD_CCtx* cctx = ZSTD_createCCtx();
ZSTD_DCtx* dctx = ZSTD_createDCtx();
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_maxBlockSize, 2048));
CHECK_Z(ZSTD_DCtx_setParameter(dctx, ZSTD_d_maxBlockSize, 2048));

cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize));

CHECK_Z(ZSTD_DCtx_setParameter(dctx, ZSTD_d_maxBlockSize, 1024));
CHECK(ZSTD_isError(ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize)));

ZSTD_freeDCtx(dctx);
ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3i : ldm fill dict out-of-bounds check", testNb++);
{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();

size_t const size = (1U << 10);
size_t const dstCapacity = ZSTD_compressBound(size);
void* dict = (void*)malloc(size);
void* src = (void*)malloc(size);
void* dst = (void*)malloc(dstCapacity);

RDG_genBuffer(dict, size, 0.5, 0.5, seed);
RDG_genBuffer(src, size, 0.5, 0.5, seed);

CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable));
assert(!ZSTD_isError(ZSTD_compress_usingDict(cctx, dst, dstCapacity, src, size, dict, size, 3)));

ZSTD_freeCCtx(cctx);
free(dict);
free(src);
free(dst);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing dict compression with enableLdm and forceMaxWindow : ", testNb++);
{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
void* dict = (void*)malloc(CNBuffSize);
int nbWorkers;

for (nbWorkers = 0; nbWorkers < 3; ++nbWorkers) {
RDG_genBuffer(dict, CNBuffSize, 0.5, 0.5, seed);
RDG_genBuffer(CNBuffer, CNBuffSize, 0.6, 0.6, seed);

CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, nbWorkers));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_forceMaxWindow, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable));
CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, CNBuffSize));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dict, CNBuffSize));
}

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
free(dict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing dict compression for determinism : ", testNb++);
{
size_t const testSize = 1024;
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
char* dict = (char*)malloc(2 * testSize);
int ldmEnabled, level;

RDG_genBuffer(dict, testSize, 0.5, 0.5, seed);
RDG_genBuffer(CNBuffer, testSize, 0.6, 0.6, seed);
memcpy(dict + testSize, CNBuffer, testSize);
for (level = 1; level <= 5; ++level) {
for (ldmEnabled = ZSTD_ps_enable; ldmEnabled <= ZSTD_ps_disable; ++ldmEnabled) {
size_t cSize0;
XXH64_hash_t compressedChecksum0;

CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, level));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ldmEnabled));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_deterministicRefPrefix, 1));

CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, testSize));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, testSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, testSize, compressedBuffer, cSize, dict, testSize));

cSize0 = cSize;
compressedChecksum0 = XXH64(compressedBuffer, cSize, 0);

CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, testSize));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, dict + testSize, testSize);
CHECK_Z(cSize);

if (cSize != cSize0) goto _output_error;
if (XXH64(compressedBuffer, cSize, 0) != compressedChecksum0) goto _output_error;
}
}

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
free(dict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : LDM + opt parser with small uncompressible block ", testNb++);
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
ZSTD_DCtx* dctx = ZSTD_createDCtx();
size_t const srcSize = 300 KB;
size_t const flushSize = 128 KB + 5;
size_t const dstSize = ZSTD_compressBound(srcSize);
char* src = (char*)CNBuffer;
char* dst = (char*)compressedBuffer;

ZSTD_outBuffer out = { dst, dstSize, 0 };
ZSTD_inBuffer in = { src, flushSize, 0 };

if (!cctx || !dctx) {
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}

RDG_genBuffer(src, srcSize, 0.5, 0.5, seed);
/* Force an LDM to exist that crosses block boundary into uncompressible block */
memcpy(src + 125 KB, src, 3 KB + 5);

/* Enable MT, LDM, and opt parser */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19));

/* Flushes a block of 128 KB and block of 5 bytes */
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));

/* Compress the rest */
in.size = 300 KB;
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));

CHECK_Z(ZSTD_decompress(decodedBuffer, CNBuffSize, dst, out.pos));

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing ldm dictionary gets invalidated : ", testNb++);
{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
void* dict = (void*)malloc(CNBuffSize);
size_t const kWindowLog = 10;
size_t const kWindowSize = (size_t)1 << kWindowLog;
size_t const dictSize = kWindowSize * 10;
size_t const srcSize1 = kWindowSize / 2;
size_t const srcSize2 = kWindowSize * 10;

CHECK(cctx!=NULL);
CHECK(dctx!=NULL);
CHECK(dict!=NULL);
if (CNBuffSize < dictSize) goto _output_error;

RDG_genBuffer(dict, dictSize, 0.5, 0.5, seed);
RDG_genBuffer(CNBuffer, srcSize1 + srcSize2, 0.5, 0.5, seed);

/* Enable checksum to verify round trip. */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
/* Disable content size to skip single-pass decompression. */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_contentSizeFlag, 0));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, (int)kWindowLog));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmMinMatch, 32));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmHashRateLog, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmHashLog, 16));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_ldmBucketSizeLog, 3));

/* Round trip once with a dictionary. */
CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, dictSize));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, srcSize1);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dict, dictSize));

cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, srcSize2);
/* Streaming decompression to catch out of bounds offsets. */
{
ZSTD_inBuffer in = {compressedBuffer, cSize, 0};
ZSTD_outBuffer out = {decodedBuffer, CNBuffSize, 0};
size_t const dSize = ZSTD_decompressStream(dctx, &out, &in);
CHECK_Z(dSize);
if (dSize != 0) goto _output_error;
}

CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 2));
/* Round trip once with a dictionary. */
CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, dictSize));
{ ZSTD_inBuffer in = {CNBuffer, srcSize1, 0};
ZSTD_outBuffer out = {compressedBuffer, compressedBufferSize, 0};
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
cSize = out.pos;
}
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dict, dictSize));

{ ZSTD_inBuffer in = {CNBuffer, srcSize2, 0};
ZSTD_outBuffer out = {compressedBuffer, compressedBufferSize, 0};
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
cSize = out.pos;
}
/* Streaming decompression to catch out of bounds offsets. */
{ ZSTD_inBuffer in = {compressedBuffer, cSize, 0};
ZSTD_outBuffer out = {decodedBuffer, CNBuffSize, 0};
size_t const dSize = ZSTD_decompressStream(dctx, &out, &in);
CHECK_Z(dSize);
if (dSize != 0) goto _output_error;
}

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
free(dict);
}
DISPLAYLEVEL(3, "OK \n");

/* Note: this test takes 0.5 seconds to run */
DISPLAYLEVEL(3, "test%3i : testing refPrefx vs refPrefx + ldm (size comparison) : ", testNb++);
{
/* test a big buffer so that ldm can take effect */
size_t const size = 100 MB;
int const windowLog = 27;
size_t const dstSize = ZSTD_compressBound(size);

void* dict = (void*)malloc(size);
void* src = (void*)malloc(size);
void* dst = (void*)malloc(dstSize);
void* recon = (void*)malloc(size);

size_t refPrefixCompressedSize = 0;
size_t refPrefixLdmCompressedSize = 0;
size_t reconSize = 0;

ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();

/* make dict and src the same uncompressible data */
RDG_genBuffer(src, size, 0, 0, seed);
memcpy(dict, src, size);
assert(!memcmp(dict, src, size));

/* set level 1 and windowLog to cover src */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, windowLog));

/* compress on level 1 using just refPrefix and no ldm */
ZSTD_CCtx_refPrefix(cctx, dict, size);
refPrefixCompressedSize = ZSTD_compress2(cctx, dst, dstSize, src, size);
assert(!ZSTD_isError(refPrefixCompressedSize));

/* test round trip just refPrefix */
ZSTD_DCtx_refPrefix(dctx, dict, size);
reconSize = ZSTD_decompressDCtx(dctx, recon, size, dst, refPrefixCompressedSize);
assert(!ZSTD_isError(reconSize));
assert(reconSize == size);
assert(!memcmp(recon, src, size));

/* compress on level 1 using refPrefix and ldm */
ZSTD_CCtx_refPrefix(cctx, dict, size);;
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable))
refPrefixLdmCompressedSize = ZSTD_compress2(cctx, dst, dstSize, src, size);
assert(!ZSTD_isError(refPrefixLdmCompressedSize));

/* test round trip refPrefix + ldm*/
ZSTD_DCtx_refPrefix(dctx, dict, size);
reconSize = ZSTD_decompressDCtx(dctx, recon, size, dst, refPrefixLdmCompressedSize);
assert(!ZSTD_isError(reconSize));
assert(reconSize == size);
assert(!memcmp(recon, src, size));

/* make sure that refPrefixCompressedSize is significantly greater */
assert(refPrefixCompressedSize > 10 * refPrefixLdmCompressedSize);
/* make sure the ldm compressed size is less than 1% of original */
assert((double)refPrefixLdmCompressedSize / (double)size < 0.01);

ZSTD_freeDCtx(dctx);
ZSTD_freeCCtx(cctx);
free(recon);
free(dict);
free(src);
free(dst);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : in-place decompression : ", testNb++);
cSize = ZSTD_compress(compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize, -ZSTD_BLOCKSIZE_MAX);
CHECK_Z(cSize);
CHECK_LT(CNBuffSize, cSize);
{
size_t const margin = ZSTD_decompressionMargin(compressedBuffer, cSize);
size_t const outputSize = (CNBuffSize + margin);
char* output = malloc(outputSize);
char* input = output + outputSize - cSize;
CHECK_LT(cSize, CNBuffSize + margin);
CHECK(output != NULL);
CHECK_Z(margin);
CHECK(margin <= ZSTD_DECOMPRESSION_MARGIN(CNBuffSize, ZSTD_BLOCKSIZE_MAX));
memcpy(input, compressedBuffer, cSize);

{
size_t const dSize = ZSTD_decompress(output, outputSize, input, cSize);
CHECK_Z(dSize);
CHECK_EQ(dSize, CNBuffSize);
}
CHECK(!memcmp(output, CNBuffer, CNBuffSize));
free(output);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : in-place decompression with 2 frames : ", testNb++);
cSize = ZSTD_compress(compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize / 3, -ZSTD_BLOCKSIZE_MAX);
CHECK_Z(cSize);
{
size_t const cSize2 = ZSTD_compress((char*)compressedBuffer + cSize, compressedBufferSize - cSize, (char const*)CNBuffer + (CNBuffSize / 3), CNBuffSize / 3, -ZSTD_BLOCKSIZE_MAX);
CHECK_Z(cSize2);
cSize += cSize2;
}
{
size_t const srcSize = (CNBuffSize / 3) * 2;
size_t const margin = ZSTD_decompressionMargin(compressedBuffer, cSize);
size_t const outputSize = (CNBuffSize + margin);
char* output = malloc(outputSize);
char* input = output + outputSize - cSize;
CHECK_LT(cSize, CNBuffSize + margin);
CHECK(output != NULL);
CHECK_Z(margin);
memcpy(input, compressedBuffer, cSize);

{
size_t const dSize = ZSTD_decompress(output, outputSize, input, cSize);
CHECK_Z(dSize);
CHECK_EQ(dSize, srcSize);
}
CHECK(!memcmp(output, CNBuffer, srcSize));
free(output);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Check block splitter with 64K literal length : ", testNb++);
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
size_t const srcSize = 256 * 1024;
U32 const compressibleLenU32 = 32 * 1024 / 4;
U32 const blockSizeU32 = 128 * 1024 / 4;
U32 const litLenU32 = 64 * 1024 / 4;
U32* data = (U32*)malloc(srcSize);
size_t dSize;

if (data == NULL || cctx == NULL) goto _output_error;

/* Generate data without any matches */
RDG_genBuffer(data, srcSize, 0.0, 0.01, 2654435761U);
/* Generate 32K of compressible data */
RDG_genBuffer(data, compressibleLenU32 * 4, 0.5, 0.5, 0xcafebabe);

/* Add a match of offset=12, length=8 at idx=16, 32, 48, 64 */
data[compressibleLenU32 + 0] = 0xFFFFFFFF;
data[compressibleLenU32 + 1] = 0xEEEEEEEE;
data[compressibleLenU32 + 4] = 0xFFFFFFFF;
data[compressibleLenU32 + 5] = 0xEEEEEEEE;

/* Add a match of offset=16, length=8 at idx=64K + 64.
* This generates a sequence with llen=64K, and repeat code 1.
* The block splitter thought this was ll0, and corrupted the
* repeat offset history.
*/
data[compressibleLenU32 + litLenU32 + 2 + 0] = 0xDDDDDDDD;
data[compressibleLenU32 + litLenU32 + 2 + 1] = 0xCCCCCCCC;
data[compressibleLenU32 + litLenU32 + 2 + 4] = 0xDDDDDDDD;
data[compressibleLenU32 + litLenU32 + 2 + 5] = 0xCCCCCCCC;

/* Add a match of offset=16, length=8 at idx=128K + 16.
* This should generate a sequence with repeat code = 1.
* But the block splitters mistake caused zstd to generate
* repeat code = 2, corrupting the data.
*/
data[blockSizeU32] = 0xBBBBBBBB;
data[blockSizeU32 + 1] = 0xAAAAAAAA;
data[blockSizeU32 + 4] = 0xBBBBBBBB;
data[blockSizeU32 + 5] = 0xAAAAAAAA;

/* Generate a golden file from this data in case datagen changes and
* doesn't generate the exact same data. We will also test this golden file.
*/
if (0) {
FILE* f = fopen("golden-compression/PR-3517-block-splitter-corruption-test", "wb");
fwrite(data, 1, srcSize, f);
fclose(f);
}

CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_minMatch, 7));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_useBlockSplitter, ZSTD_ps_enable));

cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, data, srcSize);
CHECK_Z(cSize);
dSize = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize);
CHECK_Z(dSize);
CHECK_EQ(dSize, srcSize);
CHECK(!memcmp(decodedBuffer, data, srcSize));

free(data);
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : superblock uncompressible data: too many nocompress superblocks : ", testNb++);
{
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
const BYTE* src = (BYTE*)CNBuffer; BYTE* dst = (BYTE*)compressedBuffer;
size_t srcSize = 321656; size_t dstCapacity = ZSTD_compressBound(srcSize);

/* This is the number of bytes to stream before ending. This value
* was obtained by trial and error :/. */

const size_t streamCompressThreshold = 161792;
const size_t streamCompressDelta = 1024;

/* The first 1/5 of the buffer is compressible and the last 4/5 is
* uncompressible. This is an approximation of the type of data
* the fuzzer generated to catch this bug. Streams like this were making
* zstd generate noCompress superblocks (which are larger than the src
* they come from). Do this enough times, and we'll run out of room
* and throw a dstSize_tooSmall error. */

const size_t compressiblePartSize = srcSize/5;
const size_t uncompressiblePartSize = srcSize-compressiblePartSize;
RDG_genBuffer(CNBuffer, compressiblePartSize, 0.5, 0.5, seed);
RDG_genBuffer((BYTE*)CNBuffer+compressiblePartSize, uncompressiblePartSize, 0, 0, seed);

/* Setting target block size so that superblock is used */

assert(cctx != NULL);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_targetCBlockSize, 81);

{ size_t read;
for (read = 0; read < streamCompressThreshold; read += streamCompressDelta) {
ZSTD_inBuffer in = {src, streamCompressDelta, 0};
ZSTD_outBuffer out = {dst, dstCapacity, 0};
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_continue));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
src += streamCompressDelta; srcSize -= streamCompressDelta;
dst += out.pos; dstCapacity -= out.pos;
} }

/* This is trying to catch a dstSize_tooSmall error */

{ ZSTD_inBuffer in = {src, srcSize, 0};
ZSTD_outBuffer out = {dst, dstCapacity, 0};
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d: superblock with no literals : ", testNb++);
/* Generate the same data 20 times over */
{ size_t const avgChunkSize = CNBuffSize / 20;
size_t b;
for (b = 0; b < CNBuffSize; b += avgChunkSize) {
size_t const chunkSize = MIN(CNBuffSize - b, avgChunkSize);
RDG_genBuffer((char*)CNBuffer + b, chunkSize, compressibility, 0. /* auto */, seed);
} }
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const normalCSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
size_t const allowedExpansion = (CNBuffSize * 3 / 1000);
size_t superCSize;
CHECK_Z(normalCSize);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_targetCBlockSize, 1000);
superCSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(superCSize);
if (superCSize > normalCSize + allowedExpansion) {
DISPLAYLEVEL(1, "Superblock too big: %u > %u + %u \n", (U32)superCSize, (U32)normalCSize, (U32)allowedExpansion);
goto _output_error;
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

RDG_genBuffer(CNBuffer, CNBuffSize, compressibility, 0. /*auto*/, seed);
DISPLAYLEVEL(3, "test%3d: superblock enough room for checksum : ", testNb++)
/* This tests whether or not we leave enough room for the checksum at the end
* of the dst buffer. The bug that motivated this test was found by the
* stream_round_trip fuzzer but this crashes for the same reason and is
* far more compact than re-creating the stream_round_trip fuzzer's code path */
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_CCtx_setParameter(cctx, ZSTD_c_targetCBlockSize, 64);
assert(!ZSTD_isError(ZSTD_compress2(cctx, compressedBuffer, 1339, CNBuffer, 1278)));
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress a NULL input with each level : ", testNb++);
{ int level = -1;
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
if (!cctx) goto _output_error;
for (level = -1; level <= ZSTD_maxCLevel(); ++level) {
CHECK_Z( ZSTD_compress(compressedBuffer, compressedBufferSize, NULL, 0, level) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, level) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, NULL, 0) );
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : check CCtx size after compressing empty input : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const r = ZSTD_compressCCtx(cctx, compressedBuffer, compressedBufferSize, NULL, 0, 19);
if (ZSTD_isError(r)) goto _output_error;
if (ZSTD_sizeof_CCtx(cctx) > (1U << 20)) goto _output_error;
ZSTD_freeCCtx(cctx);
cSize = r;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : decompress empty frame into NULL : ", testNb++);
{ size_t const r = ZSTD_decompress(NULL, 0, compressedBuffer, cSize);
if (ZSTD_isError(r)) goto _output_error;
if (r != 0) goto _output_error;
}
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_outBuffer output;
if (cctx==NULL) goto _output_error;
output.dst = compressedBuffer;
output.size = compressedBufferSize;
output.pos = 0;
CHECK_Z( ZSTD_initCStream(cctx, 1) ); /* content size unknown */
CHECK_Z( ZSTD_flushStream(cctx, &output) ); /* ensure no possibility to "concatenate" and determine the content size */
CHECK_Z( ZSTD_endStream(cctx, &output) );
ZSTD_freeCCtx(cctx);
/* single scan decompression */
{ size_t const r = ZSTD_decompress(NULL, 0, compressedBuffer, output.pos);
if (ZSTD_isError(r)) goto _output_error;
if (r != 0) goto _output_error;
}
/* streaming decompression */
{ ZSTD_DCtx* const dstream = ZSTD_createDStream();
ZSTD_inBuffer dinput;
ZSTD_outBuffer doutput;
size_t ipos;
if (dstream==NULL) goto _output_error;
dinput.src = compressedBuffer;
dinput.size = 0;
dinput.pos = 0;
doutput.dst = NULL;
doutput.size = 0;
doutput.pos = 0;
CHECK_Z ( ZSTD_initDStream(dstream) );
for (ipos=1; ipos<=output.pos; ipos++) {
dinput.size = ipos;
CHECK_Z ( ZSTD_decompressStream(dstream, &doutput, &dinput) );
}
if (doutput.pos != 0) goto _output_error;
ZSTD_freeDStream(dstream);
}
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : reuse CCtx with expanding block size : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_parameters const params = ZSTD_getParams(1, ZSTD_CONTENTSIZE_UNKNOWN, 0);
assert(params.fParams.contentSizeFlag == 1); /* block size will be adapted if pledgedSrcSize is enabled */
CHECK_Z( ZSTD_compressBegin_advanced(cctx, NULL, 0, params, 1 /*pledgedSrcSize*/) );
CHECK_Z( ZSTD_compressEnd(cctx, compressedBuffer, compressedBufferSize, CNBuffer, 1) ); /* creates a block size of 1 */

CHECK_Z( ZSTD_compressBegin_advanced(cctx, NULL, 0, params, ZSTD_CONTENTSIZE_UNKNOWN) ); /* reuse same parameters */
{ size_t const inSize = 2* 128 KB;
size_t const outSize = ZSTD_compressBound(inSize);
CHECK_Z( ZSTD_compressEnd(cctx, compressedBuffer, outSize, CNBuffer, inSize) );
/* will fail if blockSize is not resized */
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : re-using a CCtx should compress the same : ", testNb++);
{ size_t const sampleSize = 30;
int i;
for (i=0; i<20; i++)
((char*)CNBuffer)[i] = (char)i; /* ensure no match during initial section */
memcpy((char*)CNBuffer + 20, CNBuffer, 10); /* create one match, starting from beginning of sample, which is the difficult case (see #1241) */
for (i=1; i<=19; i++) {
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t size1, size2;
DISPLAYLEVEL(5, "l%i ", i);
size1 = ZSTD_compressCCtx(cctx, compressedBuffer, compressedBufferSize, CNBuffer, sampleSize, i);
CHECK_Z(size1);

size2 = ZSTD_compressCCtx(cctx, compressedBuffer, compressedBufferSize, CNBuffer, sampleSize, i);
CHECK_Z(size2);
CHECK_EQ(size1, size2);

CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, i) );
size2 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, sampleSize);
CHECK_Z(size2);
CHECK_EQ(size1, size2);

size2 = ZSTD_compress2(cctx, compressedBuffer, ZSTD_compressBound(sampleSize) - 1, CNBuffer, sampleSize); /* force streaming, as output buffer is not large enough to guarantee success */
CHECK_Z(size2);
CHECK_EQ(size1, size2);

{ ZSTD_inBuffer inb;
ZSTD_outBuffer outb;
inb.src = CNBuffer;
inb.pos = 0;
inb.size = sampleSize;
outb.dst = compressedBuffer;
outb.pos = 0;
outb.size = ZSTD_compressBound(sampleSize) - 1; /* force streaming, as output buffer is not large enough to guarantee success */
CHECK_Z( ZSTD_compressStream2(cctx, &outb, &inb, ZSTD_e_end) );
assert(inb.pos == inb.size);
CHECK_EQ(size1, outb.pos);
}

ZSTD_freeCCtx(cctx);
}
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : btultra2 & 1st block : ", testNb++);
{ size_t const sampleSize = 1024;
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_inBuffer inb;
ZSTD_outBuffer outb;
inb.src = CNBuffer;
inb.pos = 0;
inb.size = 0;
outb.dst = compressedBuffer;
outb.pos = 0;
outb.size = compressedBufferSize;
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, ZSTD_maxCLevel()) );

inb.size = sampleSize; /* start with something, so that context is already used */
CHECK_Z( ZSTD_compressStream2(cctx, &outb, &inb, ZSTD_e_end) ); /* will break internal assert if stats_init is not disabled */
assert(inb.pos == inb.size);
outb.pos = 0; /* cancel output */

CHECK_Z( ZSTD_CCtx_setPledgedSrcSize(cctx, sampleSize) );
inb.size = 4; /* too small size : compression will be skipped */
inb.pos = 0;
CHECK_Z( ZSTD_compressStream2(cctx, &outb, &inb, ZSTD_e_flush) );
assert(inb.pos == inb.size);

inb.size += 5; /* too small size : compression will be skipped */
CHECK_Z( ZSTD_compressStream2(cctx, &outb, &inb, ZSTD_e_flush) );
assert(inb.pos == inb.size);

inb.size += 11; /* small enough to attempt compression */
CHECK_Z( ZSTD_compressStream2(cctx, &outb, &inb, ZSTD_e_flush) );
assert(inb.pos == inb.size);

assert(inb.pos < sampleSize);
inb.size = sampleSize; /* large enough to trigger stats_init, but no longer at beginning */
CHECK_Z( ZSTD_compressStream2(cctx, &outb, &inb, ZSTD_e_end) ); /* will break internal assert if stats_init is not disabled */
assert(inb.pos == inb.size);
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : ZSTD_CCtx_getParameter() : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_outBuffer out = {NULL, 0, 0};
ZSTD_inBuffer in = {NULL, 0, 0};
int value;

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_compressionLevel, &value));
CHECK_EQ(value, 3);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_hashLog, ZSTD_HASHLOG_MIN));
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_compressionLevel, &value));
CHECK_EQ(value, 3);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, ZSTD_HASHLOG_MIN);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 7));
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_compressionLevel, &value));
CHECK_EQ(value, 7);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, ZSTD_HASHLOG_MIN);
/* Start a compression job */
ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_continue);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_compressionLevel, &value));
CHECK_EQ(value, 7);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, ZSTD_HASHLOG_MIN);
/* Reset the CCtx */
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_only);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_compressionLevel, &value));
CHECK_EQ(value, 7);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, ZSTD_HASHLOG_MIN);
/* Reset the parameters */
ZSTD_CCtx_reset(cctx, ZSTD_reset_parameters);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_compressionLevel, &value));
CHECK_EQ(value, 3);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, 0);

ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : ZSTD_CCtx_setCParams() : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
int value;
ZSTD_compressionParameters cparams = ZSTD_getCParams(1, 0, 0);
cparams.strategy = -1;
/* Set invalid cParams == no change. */
CHECK(ZSTD_isError(ZSTD_CCtx_setCParams(cctx, cparams)));

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_windowLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_chainLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_searchLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_minMatch, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_targetLength, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_strategy, &value));
CHECK_EQ(value, 0);

cparams = ZSTD_getCParams(12, 0, 0);
CHECK_Z(ZSTD_CCtx_setCParams(cctx, cparams));

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_windowLog, &value));
CHECK_EQ(value, (int)cparams.windowLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_chainLog, &value));
CHECK_EQ(value, (int)cparams.chainLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, (int)cparams.hashLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_searchLog, &value));
CHECK_EQ(value, (int)cparams.searchLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_minMatch, &value));
CHECK_EQ(value, (int)cparams.minMatch);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_targetLength, &value));
CHECK_EQ(value, (int)cparams.targetLength);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_strategy, &value));
CHECK_EQ(value, (int)cparams.strategy);

ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3d : ZSTD_CCtx_setFParams() : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
int value;
ZSTD_frameParameters fparams = {0, 1, 1};

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_contentSizeFlag, &value));
CHECK_EQ(value, 1);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_checksumFlag, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_dictIDFlag, &value));
CHECK_EQ(value, 1);

CHECK_Z(ZSTD_CCtx_setFParams(cctx, fparams));

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_contentSizeFlag, &value));
CHECK_EQ(value, fparams.contentSizeFlag);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_checksumFlag, &value));
CHECK_EQ(value, fparams.checksumFlag);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_dictIDFlag, &value));
CHECK_EQ(value, !fparams.noDictIDFlag);

ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3d : ZSTD_CCtx_setCarams() : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
int value;
ZSTD_parameters params = ZSTD_getParams(1, 0, 0);
params.cParams.strategy = -1;
/* Set invalid params == no change. */
CHECK(ZSTD_isError(ZSTD_CCtx_setParams(cctx, params)));

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_windowLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_chainLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_searchLog, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_minMatch, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_targetLength, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_strategy, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_contentSizeFlag, &value));
CHECK_EQ(value, 1);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_checksumFlag, &value));
CHECK_EQ(value, 0);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_dictIDFlag, &value));
CHECK_EQ(value, 1);

params = ZSTD_getParams(12, 0, 0);
params.fParams.contentSizeFlag = 0;
params.fParams.checksumFlag = 1;
params.fParams.noDictIDFlag = 1;
CHECK_Z(ZSTD_CCtx_setParams(cctx, params));

CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_windowLog, &value));
CHECK_EQ(value, (int)params.cParams.windowLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_chainLog, &value));
CHECK_EQ(value, (int)params.cParams.chainLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_hashLog, &value));
CHECK_EQ(value, (int)params.cParams.hashLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_searchLog, &value));
CHECK_EQ(value, (int)params.cParams.searchLog);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_minMatch, &value));
CHECK_EQ(value, (int)params.cParams.minMatch);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_targetLength, &value));
CHECK_EQ(value, (int)params.cParams.targetLength);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_strategy, &value));
CHECK_EQ(value, (int)params.cParams.strategy);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_contentSizeFlag, &value));
CHECK_EQ(value, params.fParams.contentSizeFlag);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_checksumFlag, &value));
CHECK_EQ(value, params.fParams.checksumFlag);
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_dictIDFlag, &value));
CHECK_EQ(value, !params.fParams.noDictIDFlag);

ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3d : ldm conditionally enabled by default doesn't change cctx params: ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_outBuffer out = {NULL, 0, 0};
ZSTD_inBuffer in = {NULL, 0, 0};
int value;

/* Even if LDM will be enabled by default in the applied params (since wlog >= 27 and strategy >= btopt),
* we should not modify the actual parameter specified by the user within the CCtx
*/
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, 27));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_strategy, ZSTD_btopt));

CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_continue));
CHECK_Z(ZSTD_CCtx_getParameter(cctx, ZSTD_c_enableLongDistanceMatching, &value));
CHECK_EQ(value, 0);

ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

/* this test is really too long, and should be made faster */
DISPLAYLEVEL(3, "test%3d : overflow protection with large windowLog : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_parameters params = ZSTD_getParams(-999, ZSTD_CONTENTSIZE_UNKNOWN, 0);
size_t const nbCompressions = ((1U << 31) / CNBuffSize) + 2; /* ensure U32 overflow protection is triggered */
size_t cnb;
assert(cctx != NULL);
params.fParams.contentSizeFlag = 0;
params.cParams.windowLog = ZSTD_WINDOWLOG_MAX;
for (cnb = 0; cnb < nbCompressions; ++cnb) {
DISPLAYLEVEL(6, "run %zu / %zu \n", cnb, nbCompressions);
CHECK_Z( ZSTD_compressBegin_advanced(cctx, NULL, 0, params, ZSTD_CONTENTSIZE_UNKNOWN) ); /* reuse same parameters */
CHECK_Z( ZSTD_compressEnd(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize) );
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : size down context : ", testNb++);
{ ZSTD_CCtx* const largeCCtx = ZSTD_createCCtx();
assert(largeCCtx != NULL);
CHECK_Z( ZSTD_compressBegin(largeCCtx, 19) ); /* streaming implies ZSTD_CONTENTSIZE_UNKNOWN, which maximizes memory usage */
CHECK_Z( ZSTD_compressEnd(largeCCtx, compressedBuffer, compressedBufferSize, CNBuffer, 1) );
{ size_t const largeCCtxSize = ZSTD_sizeof_CCtx(largeCCtx); /* size of context must be measured after compression */
{ ZSTD_CCtx* const smallCCtx = ZSTD_createCCtx();
assert(smallCCtx != NULL);
CHECK_Z(ZSTD_compressCCtx(smallCCtx, compressedBuffer, compressedBufferSize, CNBuffer, 1, 1));
{ size_t const smallCCtxSize = ZSTD_sizeof_CCtx(smallCCtx);
DISPLAYLEVEL(5, "(large) %zuKB > 32*%zuKB (small) : ",
largeCCtxSize>>10, smallCCtxSize>>10);
assert(largeCCtxSize > 32* smallCCtxSize); /* note : "too large" definition is handled within zstd_compress.c .
* make this test case extreme, so that it doesn't depend on a possibly fluctuating definition */
}
ZSTD_freeCCtx(smallCCtx);
}
{ U32 const maxNbAttempts = 1100; /* nb of usages before triggering size down is handled within zstd_compress.c.
* currently defined as 128x, but could be adjusted in the future.
* make this test long enough so that it's not too much tied to the current definition within zstd_compress.c */
unsigned u;
for (u=0; u<maxNbAttempts; u++) {
CHECK_Z(ZSTD_compressCCtx(largeCCtx, compressedBuffer, compressedBufferSize, CNBuffer, 1, 1));
if (ZSTD_sizeof_CCtx(largeCCtx) < largeCCtxSize) break; /* sized down */
}
DISPLAYLEVEL(5, "size down after %u attempts : ", u);
if (u==maxNbAttempts) goto _output_error; /* no sizedown happened */
}
}
ZSTD_freeCCtx(largeCCtx);
}
DISPLAYLEVEL(3, "OK \n");

/* Static CCtx tests */
#define STATIC_CCTX_LEVEL 4
DISPLAYLEVEL(3, "test%3i : create static CCtx for level %u : ", testNb++, STATIC_CCTX_LEVEL);
{ size_t const staticCStreamSize = ZSTD_estimateCStreamSize(STATIC_CCTX_LEVEL);
void* const staticCCtxBuffer = malloc(staticCStreamSize);
size_t const staticDCtxSize = ZSTD_estimateDCtxSize();
void* const staticDCtxBuffer = malloc(staticDCtxSize);
DISPLAYLEVEL(4, "CStream size = %u, ", (U32)staticCStreamSize);
if (staticCCtxBuffer==NULL || staticDCtxBuffer==NULL) {
free(staticCCtxBuffer);
free(staticDCtxBuffer);
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}
{ size_t const smallInSize = 32 KB;
ZSTD_compressionParameters const cparams_small = ZSTD_getCParams(STATIC_CCTX_LEVEL, smallInSize, 0);
size_t const smallCCtxSize = ZSTD_estimateCCtxSize_usingCParams(cparams_small);
size_t const staticCCtxSize = ZSTD_estimateCCtxSize(STATIC_CCTX_LEVEL);
ZSTD_CCtx* staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, smallCCtxSize);
ZSTD_DCtx* const staticDCtx = ZSTD_initStaticDCtx(staticDCtxBuffer, staticDCtxSize);
DISPLAYLEVEL(4, "Full CCtx size = %u, ", (U32)staticCCtxSize);
DISPLAYLEVEL(4, "CCtx for 32 KB = %u, ", (U32)smallCCtxSize);
if ((staticCCtx==NULL) || (staticDCtx==NULL)) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress small input with small static CCtx : ", testNb++);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, smallInSize, STATIC_CCTX_LEVEL) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n",
(unsigned)cSize, (double)cSize/smallInSize*100);

DISPLAYLEVEL(3, "test%3i : compress large input with small static CCtx (must fail) : ", testNb++);
{ size_t const r = ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, STATIC_CCTX_LEVEL);
if (ZSTD_getErrorCode((size_t)r) != ZSTD_error_memory_allocation) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : resize context to full CCtx size : ", testNb++);
staticCCtx = ZSTD_initStaticCStream(staticCCtxBuffer, staticCCtxSize);
DISPLAYLEVEL(4, "staticCCtxBuffer = %p, staticCCtx = %p , ", staticCCtxBuffer, (void*)staticCCtx);
if (staticCCtx == NULL) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress large input with static CCtx : ", testNb++);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, STATIC_CCTX_LEVEL) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n",
(unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : compress small input often enough to trigger context reduce : ", testNb++);
{ int nbc;
assert(staticCCtxSize > smallCCtxSize * ZSTD_WORKSPACETOOLARGE_FACTOR); /* ensure size down scenario */
assert(CNBuffSize > smallInSize + ZSTD_WORKSPACETOOLARGE_MAXDURATION + 3);
for (nbc=0; nbc<ZSTD_WORKSPACETOOLARGE_MAXDURATION+2; nbc++) {
CHECK_Z(ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
(char*)CNBuffer + nbc, smallInSize,
STATIC_CCTX_LEVEL) );
} }
DISPLAYLEVEL(3, "OK \n")

DISPLAYLEVEL(3, "test%3i : init CCtx for level %u : ", testNb++, STATIC_CCTX_LEVEL);
CHECK_Z( ZSTD_compressBegin(staticCCtx, STATIC_CCTX_LEVEL) );
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compression again with static CCtx : ", testNb++);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, STATIC_CCTX_LEVEL) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n",
(unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : simple decompression test with static DCtx : ", testNb++);
{ size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : check decompressed result : ", testNb++);
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : init CCtx for too large level (must fail) : ", testNb++);
{ size_t const r = ZSTD_compressBegin(staticCCtx, ZSTD_maxCLevel());
if (!ZSTD_isError(r)) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : init CCtx for small level %u (should work again) : ", testNb++, 1);
CHECK_Z( ZSTD_compressBegin(staticCCtx, 1) );
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : use CStream on CCtx-sized static context (should fail) : ", testNb++);
CHECK_Z( ZSTD_initCStream(staticCCtx, STATIC_CCTX_LEVEL) ); /* note : doesn't allocate */
{ ZSTD_outBuffer output = { compressedBuffer, compressedBufferSize, 0 };
ZSTD_inBuffer input = { CNBuffer, CNBuffSize, 0 };
size_t const r = ZSTD_compressStream(staticCCtx, &output, &input); /* now allocates, should fail */
if (!ZSTD_isError(r)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : resize context to CStream size, then stream compress : ", testNb++);
staticCCtx = ZSTD_initStaticCStream(staticCCtxBuffer, staticCStreamSize);
assert(staticCCtx != NULL);
CHECK_Z( ZSTD_initCStream(staticCCtx, STATIC_CCTX_LEVEL) ); /* note : doesn't allocate */
{ ZSTD_outBuffer output = { compressedBuffer, compressedBufferSize, 0 };
ZSTD_inBuffer input = { CNBuffer, CNBuffSize, 0 };
CHECK_Z( ZSTD_compressStream(staticCCtx, &output, &input) );
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : CStream for small level %u : ", testNb++, 1);
CHECK_Z( ZSTD_initCStream(staticCCtx, 1) ); /* note : doesn't allocate */
{ ZSTD_outBuffer output = { compressedBuffer, compressedBufferSize, 0 };
ZSTD_inBuffer input = { CNBuffer, CNBuffSize, 0 };
CHECK_Z( ZSTD_compressStream(staticCCtx, &output, &input) );
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : init static CStream with dictionary (should fail) : ", testNb++);
{ size_t const r = ZSTD_initCStream_usingDict(staticCCtx, CNBuffer, 64 KB, 1);
if (!ZSTD_isError(r)) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : use DStream on DCtx-sized static context (should fail) : ", testNb++);
CHECK_Z( ZSTD_initDStream(staticDCtx) );
{ ZSTD_outBuffer output = { decodedBuffer, CNBuffSize, 0 };
ZSTD_inBuffer input = { compressedBuffer, ZSTD_FRAMEHEADERSIZE_MAX+1, 0 };
size_t const r = ZSTD_decompressStream(staticDCtx, &output, &input);
if (!ZSTD_isError(r)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : test estimation functions with default cctx params : ", testNb++);
{
// Test ZSTD_estimateCCtxSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t const cctxSizeDefault = ZSTD_estimateCCtxSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3));

{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}

// Test ZSTD_estimateCStreamSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t const cctxSizeDefault = ZSTD_estimateCStreamSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3) );

{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : test estimation functions with maxBlockSize = 0 : ", testNb++);
{
// Test ZSTD_estimateCCtxSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t cctxSizeDefault;
CHECK_Z(ZSTD_CCtxParams_setParameter(params, ZSTD_c_maxBlockSize, 0));
cctxSizeDefault = ZSTD_estimateCCtxSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3) );

{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}

// Test ZSTD_estimateCStreamSize_usingCCtxParams
{
ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
size_t cctxSizeDefault;
CHECK_Z(ZSTD_CCtxParams_setParameter(params, ZSTD_c_maxBlockSize, 0));
cctxSizeDefault = ZSTD_estimateCStreamSize_usingCCtxParams(params);
staticCCtx = ZSTD_initStaticCCtx(staticCCtxBuffer, cctxSizeDefault);
CHECK_VAR(cSize, ZSTD_compressCCtx(staticCCtx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, 3) );

{
size_t const r = ZSTD_decompressDCtx(staticDCtx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error;
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize)) goto _output_error;
}
ZSTD_freeCCtxParams(params);
}
}
DISPLAYLEVEL(3, "OK \n");
}
free(staticCCtxBuffer);
free(staticDCtxBuffer);
}

DISPLAYLEVEL(3, "test%3i : Static context sizes for negative levels : ", testNb++);
{ size_t const cctxSizeN1 = ZSTD_estimateCCtxSize(-1);
size_t const cctxSizeP1 = ZSTD_estimateCCtxSize(1);
size_t const cstreamSizeN1 = ZSTD_estimateCStreamSize(-1);
size_t const cstreamSizeP1 = ZSTD_estimateCStreamSize(1);

if (!(0 < cctxSizeN1 && cctxSizeN1 <= cctxSizeP1)) goto _output_error;
if (!(0 < cstreamSizeN1 && cstreamSizeN1 <= cstreamSizeP1)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

/* ZSTDMT simple MT compression test */
DISPLAYLEVEL(3, "test%3i : create ZSTDMT CCtx : ", testNb++);
{ ZSTD_CCtx* const mtctx = ZSTD_createCCtx();
if (mtctx==NULL) {
DISPLAY("mtctx : not enough memory, aborting \n");
testResult = 1;
goto _end;
}
CHECK_Z( ZSTD_CCtx_setParameter(mtctx, ZSTD_c_nbWorkers, 2) );
CHECK_Z( ZSTD_CCtx_setParameter(mtctx, ZSTD_c_compressionLevel, 1) );
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3u : compress %u bytes with 2 threads : ", testNb++, (unsigned)CNBuffSize);
CHECK_VAR(cSize, ZSTD_compress2(mtctx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : decompressed size test : ", testNb++);
{ unsigned long long const rSize = ZSTD_getFrameContentSize(compressedBuffer, cSize);
if (rSize != CNBuffSize) {
DISPLAY("ZSTD_getFrameContentSize incorrect : %u != %u \n", (unsigned)rSize, (unsigned)CNBuffSize);
goto _output_error;
} }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress %u bytes : ", testNb++, (unsigned)CNBuffSize);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : check decompressed result : ", testNb++);
{ size_t u;
for (u=0; u<CNBuffSize; u++) {
if (((BYTE*)decodedBuffer)[u] != ((BYTE*)CNBuffer)[u]) goto _output_error;
} }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress -T2 with checksum : ", testNb++);
CHECK_Z( ZSTD_CCtx_setParameter(mtctx, ZSTD_c_checksumFlag, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(mtctx, ZSTD_c_contentSizeFlag, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(mtctx, ZSTD_c_overlapLog, 3) );
CHECK_VAR(cSize, ZSTD_compress2(mtctx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : decompress %u bytes : ", testNb++, (unsigned)CNBuffSize);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (r != CNBuffSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

ZSTD_freeCCtx(mtctx);
}

DISPLAYLEVEL(3, "test%3u : compress empty string and decompress with small window log : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
char out[32];
if (cctx == NULL || dctx == NULL) goto _output_error;
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_contentSizeFlag, 0) );
CHECK_VAR(cSize, ZSTD_compress2(cctx, out, sizeof(out), NULL, 0) );
DISPLAYLEVEL(3, "OK (%u bytes)\n", (unsigned)cSize);

CHECK_Z( ZSTD_DCtx_setParameter(dctx, ZSTD_d_windowLogMax, 10) );
{ char const* outPtr = out;
ZSTD_inBuffer inBuffer = { outPtr, cSize, 0 };
ZSTD_outBuffer outBuffer = { NULL, 0, 0 };
size_t dSize;
CHECK_VAR(dSize, ZSTD_decompressStream(dctx, &outBuffer, &inBuffer) );
if (dSize != 0) goto _output_error;
}

ZSTD_freeDCtx(dctx);
ZSTD_freeCCtx(cctx);
}

DISPLAYLEVEL(3, "test%3i : compress with block splitting : ", testNb++)
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_useBlockSplitter, ZSTD_ps_enable) );
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress -T2 with/without literals compression : ", testNb++)
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
size_t cSize1, cSize2;
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 2) );
cSize1 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize1);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_literalCompressionMode, ZSTD_ps_disable) );
cSize2 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize2);
CHECK_LT(cSize1, cSize2);
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Multithreaded ZSTD_compress2() with rsyncable : ", testNb++)
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
/* Set rsyncable and don't give the ZSTD_compressBound(CNBuffSize) so
* ZSTDMT is forced to not take the shortcut.
*/
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_rsyncable, 1) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize - 1, CNBuffer, CNBuffSize) );
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : setting multithreaded parameters : ", testNb++)
{ ZSTD_CCtx_params* params = ZSTD_createCCtxParams();
int const jobSize = 512 KB;
int value;
/* Check that the overlap log and job size are unset. */
CHECK_Z( ZSTD_CCtxParams_getParameter(params, ZSTD_c_overlapLog, &value) );
CHECK_EQ(value, 0);
CHECK_Z( ZSTD_CCtxParams_getParameter(params, ZSTD_c_jobSize, &value) );
CHECK_EQ(value, 0);
/* Set and check the overlap log and job size. */
CHECK_Z( ZSTD_CCtxParams_setParameter(params, ZSTD_c_overlapLog, 5) );
CHECK_Z( ZSTD_CCtxParams_setParameter(params, ZSTD_c_jobSize, jobSize) );
CHECK_Z( ZSTD_CCtxParams_getParameter(params, ZSTD_c_overlapLog, &value) );
CHECK_EQ(value, 5);
CHECK_Z( ZSTD_CCtxParams_getParameter(params, ZSTD_c_jobSize, &value) );
CHECK_EQ(value, jobSize);
/* Set the number of workers and check the overlap log and job size. */
CHECK_Z( ZSTD_CCtxParams_setParameter(params, ZSTD_c_nbWorkers, 2) );
CHECK_Z( ZSTD_CCtxParams_getParameter(params, ZSTD_c_overlapLog, &value) );
CHECK_EQ(value, 5);
CHECK_Z( ZSTD_CCtxParams_getParameter(params, ZSTD_c_jobSize, &value) );
CHECK_EQ(value, jobSize);
ZSTD_freeCCtxParams(params);
}
DISPLAYLEVEL(3, "OK \n");

/* Simple API multiframe test */
DISPLAYLEVEL(3, "test%3i : compress multiple frames : ", testNb++);
{ size_t off = 0;
int i;
int const segs = 4;
/* only use the first half so we don't push against size limit of compressedBuffer */
size_t const segSize = (CNBuffSize / 2) / segs;

const U32 skipLen = 129 KB;
char* const skipBuff = (char*)malloc(skipLen);
assert(skipBuff != NULL);
memset(skipBuff, 0, skipLen);
for (i = 0; i < segs; i++) {
CHECK_NEWV(r, ZSTD_compress(
(BYTE*)compressedBuffer + off, CNBuffSize - off,
(BYTE*)CNBuffer + segSize * (size_t)i, segSize,
5) );
off += r;
if (i == segs/2) {
/* insert skippable frame */
size_t const skippableSize =
ZSTD_writeSkippableFrame((BYTE*)compressedBuffer + off, compressedBufferSize,
skipBuff, skipLen, seed % 15);
CHECK_Z(skippableSize);
off += skippableSize;
}
}
cSize = off;
free(skipBuff);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : get decompressed size of multiple frames : ", testNb++);
{ unsigned long long const r = ZSTD_findDecompressedSize(compressedBuffer, cSize);
if (r != CNBuffSize / 2) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : get tight decompressed bound of multiple frames : ", testNb++);
{ unsigned long long const bound = ZSTD_decompressBound(compressedBuffer, cSize);
if (bound != CNBuffSize / 2) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress multiple frames : ", testNb++);
{ CHECK_NEWV(r, ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSize));
if (r != CNBuffSize / 2) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : check decompressed result : ", testNb++);
if (memcmp(decodedBuffer, CNBuffer, CNBuffSize / 2) != 0) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

/* Simple API skippable frame test */
DISPLAYLEVEL(3, "test%3i : read/write a skippable frame : ", testNb++);
{ U32 i;
unsigned readMagic;
unsigned long long receivedSize;
size_t skippableSize;
const U32 skipLen = 129 KB;
char* const skipBuff = (char*)malloc(skipLen);
assert(skipBuff != NULL);
for (i = 0; i < skipLen; i++)
skipBuff[i] = (char) ((seed + i) % 256);
skippableSize = ZSTD_writeSkippableFrame(
compressedBuffer, compressedBufferSize,
skipBuff, skipLen, seed % 15);
CHECK_Z(skippableSize);
CHECK_EQ(1, ZSTD_isSkippableFrame(compressedBuffer, skippableSize));
receivedSize = ZSTD_readSkippableFrame(decodedBuffer, CNBuffSize, &readMagic, compressedBuffer, skippableSize);
CHECK_EQ(skippableSize, receivedSize + ZSTD_SKIPPABLEHEADERSIZE);
CHECK_EQ(seed % 15, readMagic);
if (memcmp(decodedBuffer, skipBuff, skipLen) != 0) goto _output_error;

free(skipBuff);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : read/write an empty skippable frame : ", testNb++);
{
unsigned readMagic;
unsigned long long receivedSize;
size_t skippableSize;
skippableSize = ZSTD_writeSkippableFrame(
compressedBuffer, compressedBufferSize,
CNBuffer, 0, seed % 15);
CHECK_EQ(ZSTD_SKIPPABLEHEADERSIZE, skippableSize);
CHECK_EQ(1, ZSTD_isSkippableFrame(compressedBuffer, skippableSize));
receivedSize = ZSTD_readSkippableFrame(NULL, 0, &readMagic, compressedBuffer, skippableSize);
CHECK_EQ(skippableSize, receivedSize + ZSTD_SKIPPABLEHEADERSIZE);
CHECK_EQ(seed % 15, readMagic);
}
DISPLAYLEVEL(3, "OK \n");

/* Dictionary and CCtx Duplication tests */
{ ZSTD_CCtx* const ctxOrig = ZSTD_createCCtx();
ZSTD_CCtx* const ctxDuplicated = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
static const size_t dictSize = 551;
assert(dctx != NULL); assert(ctxOrig != NULL); assert(ctxDuplicated != NULL);

DISPLAYLEVEL(3, "test%3i : copy context too soon : ", testNb++);
{ size_t const copyResult = ZSTD_copyCCtx(ctxDuplicated, ctxOrig, 0);
if (!ZSTD_isError(copyResult)) goto _output_error; } /* error must be detected */
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : load dictionary into context : ", testNb++);
CHECK_Z( ZSTD_compressBegin_usingDict(ctxOrig, CNBuffer, dictSize, 2) );
CHECK_Z( ZSTD_copyCCtx(ctxDuplicated, ctxOrig, 0) ); /* Begin_usingDict implies unknown srcSize, so match that */
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress with flat dictionary : ", testNb++);
cSize = 0;
CHECKPLUS(r, ZSTD_compressEnd(ctxOrig,
compressedBuffer, compressedBufferSize,
(const char*)CNBuffer + dictSize, CNBuffSize - dictSize),
cSize += r);
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : frame built with flat dictionary should be decompressible : ", testNb++);
CHECKPLUS(r, ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
CNBuffer, dictSize),
if (r != CNBuffSize - dictSize) goto _output_error);
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress with duplicated context : ", testNb++);
{ size_t const cSizeOrig = cSize;
cSize = 0;
CHECKPLUS(r, ZSTD_compressEnd(ctxDuplicated,
compressedBuffer, compressedBufferSize,
(const char*)CNBuffer + dictSize, CNBuffSize - dictSize),
cSize += r);
if (cSize != cSizeOrig) goto _output_error; /* should be identical ==> same size */
}
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : frame built with duplicated context should be decompressible : ", testNb++);
CHECKPLUS(r, ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
CNBuffer, dictSize),
if (r != CNBuffSize - dictSize) goto _output_error);
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : decompress with DDict : ", testNb++);
{ ZSTD_DDict* const ddict = ZSTD_createDDict(CNBuffer, dictSize);
size_t const r = ZSTD_decompress_usingDDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, ddict);
if (r != CNBuffSize - dictSize) goto _output_error;
DISPLAYLEVEL(3, "OK (size of DDict : %u) \n", (unsigned)ZSTD_sizeof_DDict(ddict));
ZSTD_freeDDict(ddict);
}

DISPLAYLEVEL(3, "test%3i : decompress with static DDict : ", testNb++);
{ size_t const ddictBufferSize = ZSTD_estimateDDictSize(dictSize, ZSTD_dlm_byCopy);
void* const ddictBuffer = malloc(ddictBufferSize);
if (ddictBuffer == NULL) goto _output_error;
{ const ZSTD_DDict* const ddict = ZSTD_initStaticDDict(ddictBuffer, ddictBufferSize, CNBuffer, dictSize, ZSTD_dlm_byCopy, ZSTD_dct_auto);
size_t const r = ZSTD_decompress_usingDDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, ddict);
if (r != CNBuffSize - dictSize) goto _output_error;
}
free(ddictBuffer);
DISPLAYLEVEL(3, "OK (size of static DDict : %u) \n", (unsigned)ddictBufferSize);
}

DISPLAYLEVEL(3, "test%3i : check content size on duplicated context : ", testNb++);
{ size_t const testSize = CNBuffSize / 3;
CHECK_Z( ZSTD_compressBegin(ctxOrig, ZSTD_defaultCLevel()) );
CHECK_Z( ZSTD_copyCCtx(ctxDuplicated, ctxOrig, testSize) );

CHECK_VAR(cSize, ZSTD_compressEnd(ctxDuplicated, compressedBuffer, ZSTD_compressBound(testSize),
(const char*)CNBuffer + dictSize, testSize) );
{ ZSTD_frameHeader zfh;
if (ZSTD_getFrameHeader(&zfh, compressedBuffer, cSize)) goto _output_error;
if ((zfh.frameContentSize != testSize) && (zfh.frameContentSize != 0)) goto _output_error;
} }
DISPLAYLEVEL(3, "OK \n");

#if !defined(ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR) \
&& !defined(ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR)
/* Note : these tests should be replaced by proper regression tests,
* but existing ones do not focus on small data + dictionary + all levels.
*/
if ((int)(compressibility * 100 + 0.1) == FUZ_compressibility_default) { /* test only valid with known input */
size_t const flatdictSize = 22 KB;
size_t const contentSize = 9 KB;
const void* const dict = (const char*)CNBuffer;
const void* const contentStart = (const char*)dict + flatdictSize;
/* These upper bounds are generally within a few bytes of the compressed size */
size_t target_nodict_cSize[22+1] = { 3840, 3770, 3870, 3830, 3770,
3770, 3770, 3770, 3750, 3750,
3742, 3675, 3674, 3665, 3664,
3663, 3662, 3661, 3660, 3660,
3660, 3660, 3660 };
size_t const target_wdict_cSize[22+1] = { 2830, 2896, 2893, 2820, 2940,
2950, 2950, 2925, 2900, 2892,
2910, 2910, 2910, 2780, 2775,
2765, 2760, 2755, 2754, 2753,
2753, 2753, 2753 };
int l = 1;
int const maxLevel = ZSTD_maxCLevel();
/* clevels with strategies that support rowhash on small inputs */
int rowLevel = 4;
int const rowLevelEnd = 8;

DISPLAYLEVEL(3, "test%3i : flat-dictionary efficiency test : \n", testNb++);
assert(maxLevel == 22);
RDG_genBuffer(CNBuffer, flatdictSize + contentSize, compressibility, 0., seed);
DISPLAYLEVEL(4, "content hash : %016llx; dict hash : %016llx \n",
(unsigned long long)XXH64(contentStart, contentSize, 0),
(unsigned long long)XXH64(dict, flatdictSize, 0));

for ( ; l <= maxLevel; l++) {
size_t const nodict_cSize = ZSTD_compress(compressedBuffer, compressedBufferSize,
contentStart, contentSize, l);
if (nodict_cSize > target_nodict_cSize[l]) {
DISPLAYLEVEL(1, "error : compression at level %i worse than expected (%u > %u) \n",
l, (unsigned)nodict_cSize, (unsigned)target_nodict_cSize[l]);
goto _output_error;
}
DISPLAYLEVEL(4, "level %i : max expected %u >= reached %u \n",
l, (unsigned)target_nodict_cSize[l], (unsigned)nodict_cSize);
}
for ( l=1 ; l <= maxLevel; l++) {
size_t const wdict_cSize = ZSTD_compress_usingDict(ctxOrig,
compressedBuffer, compressedBufferSize,
contentStart, contentSize,
dict, flatdictSize,
l);
if (wdict_cSize > target_wdict_cSize[l]) {
DISPLAYLEVEL(1, "error : compression with dictionary at level %i worse than expected (%u > %u) \n",
l, (unsigned)wdict_cSize, (unsigned)target_wdict_cSize[l]);
goto _output_error;
}
DISPLAYLEVEL(4, "level %i with dictionary : max expected %u >= reached %u \n",
l, (unsigned)target_wdict_cSize[l], (unsigned)wdict_cSize);
}
/* Compression with ZSTD_compress2 and row match finder force enabled.
* Give some slack for force-enabled row matchfinder since we're on a small input (9KB)
*/
for ( ; rowLevel <= rowLevelEnd; ++rowLevel) target_nodict_cSize[rowLevel] += 5;
for (l=1 ; l <= maxLevel; l++) {
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t nodict_cSize;
ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, l);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_useRowMatchFinder, ZSTD_ps_enable);
nodict_cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize,
contentStart, contentSize);
if (nodict_cSize > target_nodict_cSize[l]) {
DISPLAYLEVEL(1, "error : compression with compress2 at level %i worse than expected (%u > %u) \n",
l, (unsigned)nodict_cSize, (unsigned)target_nodict_cSize[l]);
ZSTD_freeCCtx(cctx);
goto _output_error;
}
DISPLAYLEVEL(4, "level %i with compress2 : max expected %u >= reached %u \n",
l, (unsigned)target_nodict_cSize[l], (unsigned)nodict_cSize);
ZSTD_freeCCtx(cctx);
}
/* Dict compression with DMS */
for ( l=1 ; l <= maxLevel; l++) {
size_t wdict_cSize;
CHECK_Z( ZSTD_CCtx_loadDictionary(ctxOrig, dict, flatdictSize) );
CHECK_Z( ZSTD_CCtx_setParameter(ctxOrig, ZSTD_c_compressionLevel, l) );
CHECK_Z( ZSTD_CCtx_setParameter(ctxOrig, ZSTD_c_enableDedicatedDictSearch, 0) );
CHECK_Z( ZSTD_CCtx_setParameter(ctxOrig, ZSTD_c_forceAttachDict, ZSTD_dictForceAttach) );
CHECK_Z( ZSTD_CCtx_setParameter(ctxOrig, ZSTD_c_prefetchCDictTables, seed % 3) );
wdict_cSize = ZSTD_compress2(ctxOrig, compressedBuffer, compressedBufferSize, contentStart, contentSize);
if (wdict_cSize > target_wdict_cSize[l]) {
DISPLAYLEVEL(1, "error : compression with dictionary and compress2 at level %i worse than expected (%u > %u) \n",
l, (unsigned)wdict_cSize, (unsigned)target_wdict_cSize[l]);
goto _output_error;
}
DISPLAYLEVEL(4, "level %i with dictionary and compress2 : max expected %u >= reached %u \n",
l, (unsigned)target_wdict_cSize[l], (unsigned)wdict_cSize);
}

DISPLAYLEVEL(4, "compression efficiency tests OK \n");
}
#endif

ZSTD_freeCCtx(ctxOrig);
ZSTD_freeCCtx(ctxDuplicated);
ZSTD_freeDCtx(dctx);
}

/* Dictionary and dictBuilder tests */
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const dictBufferCapacity = 16 KB;
void* const 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;
size_t dictHeaderSize;
size_t dictBufferFixedSize = 144;
unsigned char const dictBufferFixed[144] = {0x37, 0xa4, 0x30, 0xec, 0x63, 0x00, 0x00, 0x00, 0x08, 0x10, 0x00, 0x1f,
0x0f, 0x00, 0x28, 0xe5, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x80, 0x0f, 0x9e, 0x0f, 0x00, 0x00, 0x24, 0x40, 0x80, 0x00, 0x01,
0x02, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0xde, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0xbc, 0xe1, 0x4b, 0x92, 0x0e, 0xb4, 0x7b, 0x18,
0x86, 0x61, 0x18, 0xc6, 0x18, 0x63, 0x8c, 0x31, 0xc6, 0x18, 0x63, 0x8c,
0x31, 0x66, 0x66, 0x66, 0x66, 0xb6, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x04,
0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x20, 0x73, 0x6f, 0x64, 0x61,
0x6c, 0x65, 0x73, 0x20, 0x74, 0x6f, 0x72, 0x74, 0x6f, 0x72, 0x20, 0x65,
0x6c, 0x65, 0x69, 0x66, 0x65, 0x6e, 0x64, 0x2e, 0x20, 0x41, 0x6c, 0x69};

if (dictBuffer==NULL || samplesSizes==NULL) {
free(dictBuffer);
free(samplesSizes);
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", (unsigned)sDictSize);
}

DISPLAYLEVEL(3, "test%3i : dictBuilder : ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
dictSize = ZDICT_trainFromBuffer(dictBuffer, dictBufferCapacity,
CNBuffer, samplesSizes, nbSamples);
if (ZDICT_isError(dictSize)) goto _output_error;
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)dictSize);

DISPLAYLEVEL(3, "test%3i : Multithreaded COVER dictBuilder : ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
{ ZDICT_cover_params_t coverParams;
memset(&coverParams, 0, sizeof(coverParams));
coverParams.steps = 8;
coverParams.nbThreads = 4;
dictSize = ZDICT_optimizeTrainFromBuffer_cover(
dictBuffer, dictBufferCapacity,
CNBuffer, samplesSizes, nbSamples/8, /* less samples for faster tests */
&coverParams);
if (ZDICT_isError(dictSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)dictSize);

DISPLAYLEVEL(3, "test%3i : COVER dictBuilder with shrinkDict: ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
{ ZDICT_cover_params_t coverParams;
memset(&coverParams, 0, sizeof(coverParams));
coverParams.steps = 8;
coverParams.nbThreads = 4;
coverParams.shrinkDict = 1;
coverParams.shrinkDictMaxRegression = 1;
dictSize = ZDICT_optimizeTrainFromBuffer_cover(
dictBuffer, dictBufferCapacity,
CNBuffer, samplesSizes, nbSamples/8, /* less samples for faster tests */
&coverParams);
if (ZDICT_isError(dictSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)dictSize);

DISPLAYLEVEL(3, "test%3i : Multithreaded FASTCOVER dictBuilder : ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
{ ZDICT_fastCover_params_t fastCoverParams;
memset(&fastCoverParams, 0, sizeof(fastCoverParams));
fastCoverParams.steps = 8;
fastCoverParams.nbThreads = 4;
dictSize = ZDICT_optimizeTrainFromBuffer_fastCover(
dictBuffer, dictBufferCapacity,
CNBuffer, samplesSizes, nbSamples,
&fastCoverParams);
if (ZDICT_isError(dictSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)dictSize);

DISPLAYLEVEL(3, "test%3i : FASTCOVER dictBuilder with shrinkDict: ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
{ ZDICT_fastCover_params_t fastCoverParams;
memset(&fastCoverParams, 0, sizeof(fastCoverParams));
fastCoverParams.steps = 8;
fastCoverParams.nbThreads = 4;
fastCoverParams.shrinkDict = 1;
fastCoverParams.shrinkDictMaxRegression = 1;
dictSize = ZDICT_optimizeTrainFromBuffer_fastCover(
dictBuffer, dictBufferCapacity,
CNBuffer, samplesSizes, nbSamples,
&fastCoverParams);
if (ZDICT_isError(dictSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)dictSize);

DISPLAYLEVEL(3, "test%3i : check dictID : ", testNb++);
dictID = ZDICT_getDictID(dictBuffer, dictSize);
if (dictID==0) goto _output_error;
DISPLAYLEVEL(3, "OK : %u \n", (unsigned)dictID);

DISPLAYLEVEL(3, "test%3i : check dict header size no error : ", testNb++);
dictHeaderSize = ZDICT_getDictHeaderSize(dictBuffer, dictSize);
if (dictHeaderSize==0) goto _output_error;
DISPLAYLEVEL(3, "OK : %u \n", (unsigned)dictHeaderSize);

DISPLAYLEVEL(3, "test%3i : check dict header size correctness : ", testNb++);
{ dictHeaderSize = ZDICT_getDictHeaderSize(dictBufferFixed, dictBufferFixedSize);
if (dictHeaderSize != 115) goto _output_error;
}
DISPLAYLEVEL(3, "OK : %u \n", (unsigned)dictHeaderSize);

DISPLAYLEVEL(3, "test%3i : compress with dictionary : ", testNb++);
cSize = ZSTD_compress_usingDict(cctx, compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize,
dictBuffer, dictSize, 4);
if (ZSTD_isError(cSize)) goto _output_error;
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : retrieve dictID from dictionary : ", testNb++);
{ U32 const did = ZSTD_getDictID_fromDict(dictBuffer, dictSize);
if (did != dictID) goto _output_error; /* non-conformant (content-only) dictionary */
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : retrieve dictID from frame : ", testNb++);
{ U32 const did = ZSTD_getDictID_fromFrame(compressedBuffer, cSize);
if (did != dictID) goto _output_error; /* non-conformant (content-only) dictionary */
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : frame built with dictionary should be decompressible : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx(); assert(dctx != NULL);
CHECKPLUS(r, ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
dictBuffer, dictSize),
if (r != CNBuffSize) goto _output_error);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : estimate CDict size : ", testNb++);
{ ZSTD_compressionParameters const cParams = ZSTD_getCParams(1, CNBuffSize, dictSize);
size_t const estimatedSize = ZSTD_estimateCDictSize_advanced(dictSize, cParams, ZSTD_dlm_byRef);
DISPLAYLEVEL(3, "OK : %u \n", (unsigned)estimatedSize);
}

DISPLAYLEVEL(3, "test%3i : compress with CDict ", testNb++);
{ ZSTD_compressionParameters const cParams = ZSTD_getCParams(1, CNBuffSize, dictSize);
ZSTD_CDict* const cdict = ZSTD_createCDict_advanced(dictBuffer, dictSize,
ZSTD_dlm_byRef, ZSTD_dct_auto,
cParams, ZSTD_defaultCMem);
assert(cdict != NULL);
DISPLAYLEVEL(3, "(size : %u) : ", (unsigned)ZSTD_sizeof_CDict(cdict));
assert(ZSTD_getDictID_fromDict(dictBuffer, dictSize) == ZSTD_getDictID_fromCDict(cdict));
cSize = ZSTD_compress_usingCDict(cctx, compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize, cdict);
ZSTD_freeCDict(cdict);
if (ZSTD_isError(cSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : retrieve dictID from frame : ", testNb++);
{ U32 const did = ZSTD_getDictID_fromFrame(compressedBuffer, cSize);
if (did != dictID) goto _output_error; /* non-conformant (content-only) dictionary */
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : frame built with dictionary should be decompressible : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx(); assert(dctx != NULL);
CHECKPLUS(r, ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
dictBuffer, dictSize),
if (r != CNBuffSize) goto _output_error);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress with static CDict : ", testNb++);
{ int const maxLevel = ZSTD_maxCLevel();
int level;
for (level = 1; level <= maxLevel; ++level) {
ZSTD_compressionParameters const cParams = ZSTD_getCParams(level, CNBuffSize, dictSize);
size_t const cdictSize = ZSTD_estimateCDictSize_advanced(dictSize, cParams, ZSTD_dlm_byCopy);
void* const cdictBuffer = malloc(cdictSize);
if (cdictBuffer==NULL) goto _output_error;
{ const ZSTD_CDict* const cdict = ZSTD_initStaticCDict(
cdictBuffer, cdictSize,
dictBuffer, dictSize,
ZSTD_dlm_byCopy, ZSTD_dct_auto,
cParams);
if (cdict == NULL) {
DISPLAY("ZSTD_initStaticCDict failed ");
goto _output_error;
}
cSize = ZSTD_compress_usingCDict(cctx,
compressedBuffer, compressedBufferSize,
CNBuffer, MIN(10 KB, CNBuffSize), cdict);
if (ZSTD_isError(cSize)) {
DISPLAY("ZSTD_compress_usingCDict failed ");
goto _output_error;
} }
free(cdictBuffer);
} }
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : ZSTD_compress_usingCDict_advanced, no contentSize, no dictID : ", testNb++);
{ ZSTD_frameParameters const fParams = { 0 /* frameSize */, 1 /* checksum */, 1 /* noDictID*/ };
ZSTD_compressionParameters const cParams = ZSTD_getCParams(1, CNBuffSize, dictSize);
ZSTD_CDict* const cdict = ZSTD_createCDict_advanced(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, cParams, ZSTD_defaultCMem);
assert(cdict != NULL);
cSize = ZSTD_compress_usingCDict_advanced(cctx,
compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize,
cdict, fParams);
ZSTD_freeCDict(cdict);
if (ZSTD_isError(cSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : try retrieving contentSize from frame : ", testNb++);
{ U64 const contentSize = ZSTD_getFrameContentSize(compressedBuffer, cSize);
if (contentSize != ZSTD_CONTENTSIZE_UNKNOWN) goto _output_error;
}
DISPLAYLEVEL(3, "OK (unknown)\n");

DISPLAYLEVEL(3, "test%3i : frame built without dictID should be decompressible : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx();
assert(dctx != NULL);
CHECKPLUS(r, ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
dictBuffer, dictSize),
if (r != CNBuffSize) goto _output_error);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_compress_advanced, no dictID : ", testNb++);
{ ZSTD_parameters p = ZSTD_getParams(3, CNBuffSize, dictSize);
p.fParams.noDictIDFlag = 1;
cSize = ZSTD_compress_advanced(cctx, compressedBuffer, compressedBufferSize,
CNBuffer, CNBuffSize,
dictBuffer, dictSize, p);
if (ZSTD_isError(cSize)) goto _output_error;
}
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/CNBuffSize*100);

DISPLAYLEVEL(3, "test%3i : frame built without dictID should be decompressible : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx(); assert(dctx != NULL);
CHECKPLUS(r, ZSTD_decompress_usingDict(dctx,
decodedBuffer, CNBuffSize,
compressedBuffer, cSize,
dictBuffer, dictSize),
if (r != CNBuffSize) goto _output_error);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : dictionary containing only header should return error : ", testNb++);
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx();
assert(dctx != NULL);
{ const size_t ret = ZSTD_decompress_usingDict(
dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize,
"\x37\xa4\x30\xec\x11\x22\x33\x44", 8);
if (ZSTD_getErrorCode(ret) != ZSTD_error_dictionary_corrupted)
goto _output_error;
}
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3d : bufferless api with cdict : ", testNb++);
{ ZSTD_CDict* const cdict = ZSTD_createCDict(dictBuffer, dictSize, 1);
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
ZSTD_frameParameters const fParams = { 0, 1, 0 };
size_t cBlockSize;
cSize = 0;
CHECK_Z(ZSTD_compressBegin_usingCDict_advanced(cctx, cdict, fParams, ZSTD_CONTENTSIZE_UNKNOWN));
cBlockSize = ZSTD_compressContinue(cctx, (char*)compressedBuffer + cSize, compressedBufferSize - cSize, CNBuffer, 1000);
CHECK_Z(cBlockSize);
cSize += cBlockSize;
cBlockSize = ZSTD_compressEnd(cctx, (char*)compressedBuffer + cSize, compressedBufferSize - cSize, (char const*)CNBuffer + 2000, 1000);
CHECK_Z(cBlockSize);
cSize += cBlockSize;

CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dictBuffer, dictSize));

ZSTD_freeCDict(cdict);
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Building cdict w/ ZSTD_dct_fullDict on a good dictionary : ", testNb++);
{ ZSTD_compressionParameters const cParams = ZSTD_getCParams(1, CNBuffSize, dictSize);
ZSTD_CDict* const cdict = ZSTD_createCDict_advanced(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_fullDict, cParams, ZSTD_defaultCMem);
if (cdict==NULL) goto _output_error;
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Building cdict w/ ZSTD_dct_fullDict on a rawContent (must fail) : ", testNb++);
{ ZSTD_compressionParameters const cParams = ZSTD_getCParams(1, CNBuffSize, dictSize);
ZSTD_CDict* const cdict = ZSTD_createCDict_advanced((const char*)dictBuffer+1, dictSize-1, ZSTD_dlm_byRef, ZSTD_dct_fullDict, cParams, ZSTD_defaultCMem);
if (cdict!=NULL) goto _output_error;
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

{ char* rawDictBuffer = (char*)malloc(dictSize);
assert(rawDictBuffer);
memcpy(rawDictBuffer, (char*)dictBuffer + 2, dictSize - 2);
memset(rawDictBuffer + dictSize - 2, 0, 2);
MEM_writeLE32((char*)rawDictBuffer, ZSTD_MAGIC_DICTIONARY);

DISPLAYLEVEL(3, "test%3i : Loading rawContent starting with dict header w/ ZSTD_dct_auto should fail : ", testNb++);
{
size_t ret;
/* Either operation is allowed to fail, but one must fail. */
ret = ZSTD_CCtx_loadDictionary_advanced(
cctx, (const char*)rawDictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto);
if (!ZSTD_isError(ret)) {
ret = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100));
if (!ZSTD_isError(ret)) goto _output_error;
}
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading rawContent starting with dict header w/ ZSTD_dct_rawContent should pass : ", testNb++);
{
size_t ret;
ret = ZSTD_CCtx_loadDictionary_advanced(
cctx, (const char*)rawDictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_rawContent);
if (ZSTD_isError(ret)) goto _output_error;
ret = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100));
if (ZSTD_isError(ret)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Testing non-attached CDict with ZSTD_dct_rawContent : ", testNb++);
{ size_t const srcSize = MIN(CNBuffSize, 100);
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
/* Force the dictionary to be reloaded in raw content mode */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_forceAttachDict, ZSTD_dictForceLoad));
CHECK_Z(ZSTD_CCtx_loadDictionary_advanced(cctx, rawDictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_rawContent));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, srcSize);
CHECK_Z(cSize);
}
DISPLAYLEVEL(3, "OK \n");

free(rawDictBuffer);
}

DISPLAYLEVEL(3, "test%3i : ZSTD_CCtx_refCDict() then set parameters : ", testNb++);
{ ZSTD_CDict* const cdict = ZSTD_createCDict(CNBuffer, dictSize, 1);
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_hashLog, 12 ));
CHECK_Z( ZSTD_CCtx_refCDict(cctx, cdict) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 1) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_hashLog, 12 ));
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading dictionary before setting parameters is the same as loading after : ", testNb++);
{
size_t size1, size2;
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 7) );
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, CNBuffer, MIN(CNBuffSize, 10 KB)) );
size1 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
if (ZSTD_isError(size1)) goto _output_error;

ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, CNBuffer, MIN(CNBuffSize, 10 KB)) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 7) );
size2 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
if (ZSTD_isError(size2)) goto _output_error;

if (size1 != size2) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading a dictionary clears the prefix : ", testNb++);
{
CHECK_Z( ZSTD_CCtx_refPrefix(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100)) );
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading a dictionary clears the cdict : ", testNb++);
{
ZSTD_CDict* const cdict = ZSTD_createCDict(dictBuffer, dictSize, 1);
CHECK_Z( ZSTD_CCtx_refCDict(cctx, cdict) );
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100)) );
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading a cdict clears the prefix : ", testNb++);
{
ZSTD_CDict* const cdict = ZSTD_createCDict(dictBuffer, dictSize, 1);
CHECK_Z( ZSTD_CCtx_refPrefix(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_CCtx_refCDict(cctx, cdict) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100)) );
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading a cdict clears the dictionary : ", testNb++);
{
ZSTD_CDict* const cdict = ZSTD_createCDict(dictBuffer, dictSize, 1);
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_CCtx_refCDict(cctx, cdict) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100)) );
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading a prefix clears the dictionary : ", testNb++);
{
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_CCtx_refPrefix(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100)) );
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loading a prefix clears the cdict : ", testNb++);
{
ZSTD_CDict* const cdict = ZSTD_createCDict(dictBuffer, dictSize, 1);
CHECK_Z( ZSTD_CCtx_refCDict(cctx, cdict) );
CHECK_Z( ZSTD_CCtx_refPrefix(cctx, (const char*)dictBuffer, dictSize) );
CHECK_Z( ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100)) );
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loaded dictionary persists across reset session : ", testNb++);
{
size_t size1, size2;
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, CNBuffer, MIN(CNBuffSize, 10 KB)) );
size1 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
if (ZSTD_isError(size1)) goto _output_error;

ZSTD_CCtx_reset(cctx, ZSTD_reset_session_only);
size2 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
if (ZSTD_isError(size2)) goto _output_error;

if (size1 != size2) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Loaded dictionary is cleared after resetting parameters : ", testNb++);
{
size_t size1, size2;
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, CNBuffer, MIN(CNBuffSize, 10 KB)) );
size1 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
if (ZSTD_isError(size1)) goto _output_error;

ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
size2 = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
if (ZSTD_isError(size2)) goto _output_error;

if (size1 == size2) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_CCtx_loadDictionary(cctx, dictBuffer, dictSize) );
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, MIN(CNBuffSize, 100 KB));
CHECK_Z(cSize);
DISPLAYLEVEL(3, "test%3i : ZSTD_decompressDCtx() with dictionary : ", testNb++);
{
ZSTD_DCtx* dctx = ZSTD_createDCtx();
size_t ret;
/* We should fail to decompress without a dictionary. */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
ret = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (!ZSTD_isError(ret)) goto _output_error;
/* We should succeed to decompress with the dictionary. */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_DCtx_loadDictionary(dctx, dictBuffer, dictSize) );
CHECK_Z( ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
/* The dictionary should persist across calls. */
CHECK_Z( ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
/* When we reset the context the dictionary is cleared. */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
ret = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (!ZSTD_isError(ret)) goto _output_error;
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_decompressDCtx() with ddict : ", testNb++);
{
ZSTD_DCtx* dctx = ZSTD_createDCtx();
ZSTD_DDict* ddict = ZSTD_createDDict(dictBuffer, dictSize);
size_t ret;
/* We should succeed to decompress with the ddict. */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_DCtx_refDDict(dctx, ddict) );
CHECK_Z( ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
/* The ddict should persist across calls. */
CHECK_Z( ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
/* When we reset the context the ddict is cleared. */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
ret = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (!ZSTD_isError(ret)) goto _output_error;
ZSTD_freeDCtx(dctx);
ZSTD_freeDDict(ddict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_decompressDCtx() with prefix : ", testNb++);
{
ZSTD_DCtx* dctx = ZSTD_createDCtx();
size_t ret;
/* We should succeed to decompress with the prefix. */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_DCtx_refPrefix_advanced(dctx, dictBuffer, dictSize, ZSTD_dct_auto) );
CHECK_Z( ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
/* The prefix should be cleared after the first compression. */
ret = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (!ZSTD_isError(ret)) goto _output_error;
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_fast attach dictionary with hashLog = 25 and chainLog = 25 : ", testNb++);
{
ZSTD_CCtx_params* cctxParams = ZSTD_createCCtxParams();
ZSTD_customMem customMem = {NULL, NULL, NULL};
ZSTD_DCtx* dctx = ZSTD_createDCtx();
ZSTD_CDict* cdict;
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_strategy, ZSTD_fast));
/* Set windowLog to 25 so hash/chain logs don't get sized down */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_windowLog, 25));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_hashLog, 25));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_chainLog, 25));
/* Set srcSizeHint to 2^25 so hash/chain logs don't get sized down */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_srcSizeHint, 1u << 25));
cdict = ZSTD_createCDict_advanced2(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, cctxParams, customMem);
CHECK_Z(ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_forceAttachDict, ZSTD_dictForceAttach));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_refCDict(cctx, cdict));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dictBuffer, dictSize));
ZSTD_freeCDict(cdict);
ZSTD_freeDCtx(dctx);
ZSTD_freeCCtxParams(cctxParams);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_dfast attach dictionary with hashLog = 25 and chainLog = 25 : ", testNb++);
{
ZSTD_CCtx_params* cctxParams = ZSTD_createCCtxParams();
ZSTD_customMem customMem = {NULL, NULL, NULL};
ZSTD_DCtx* dctx = ZSTD_createDCtx();
ZSTD_CDict* cdict;
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_strategy, ZSTD_dfast));
/* Set windowLog to 25 so hash/chain logs don't get sized down */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_windowLog, 25));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_hashLog, 25));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_chainLog, 25));
/* Set srcSizeHint to 2^25 so hash/chain logs don't get sized down */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_srcSizeHint, 1u << 25));
cdict = ZSTD_createCDict_advanced2(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, cctxParams, customMem);
CHECK_Z(ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_forceAttachDict, ZSTD_dictForceAttach));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_refCDict(cctx, cdict));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dictBuffer, dictSize));
ZSTD_freeCDict(cdict);
ZSTD_freeDCtx(dctx);
ZSTD_freeCCtxParams(cctxParams);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_lazy attach dictionary with hashLog = 29 and searchLog = 4 : ", testNb++);
if (MEM_64bits()) {
ZSTD_CCtx_params* cctxParams = ZSTD_createCCtxParams();
ZSTD_customMem customMem = {NULL, NULL, NULL};
ZSTD_DCtx* dctx = ZSTD_createDCtx();
ZSTD_CDict* cdict;
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_strategy, ZSTD_lazy));
/* Force enable row based match finder, and disable dedicated dict search. */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_useRowMatchFinder, ZSTD_ps_enable));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_enableDedicatedDictSearch, 0));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_searchLog, 4));
/* Set windowLog to 29 so hash/chain logs don't get sized down */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_windowLog, 29));
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_hashLog, 29));
/* Set srcSizeHint to 2^29 so hash/chain logs don't get sized down */
CHECK_Z(ZSTD_CCtxParams_setParameter(cctxParams, ZSTD_c_srcSizeHint, 1u << 29));
cdict = ZSTD_createCDict_advanced2(dictBuffer, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, cctxParams, customMem);
CHECK_Z(ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_forceAttachDict, ZSTD_dictForceAttach));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_refCDict(cctx, cdict));
cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dictBuffer, dictSize));
ZSTD_freeCDict(cdict);
ZSTD_freeDCtx(dctx);
ZSTD_freeCCtxParams(cctxParams);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Dictionary with non-default repcodes : ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
dictSize = ZDICT_trainFromBuffer(dictBuffer, dictSize,
CNBuffer, samplesSizes, nbSamples);
if (ZDICT_isError(dictSize)) goto _output_error;
/* Set all the repcodes to non-default */
{
BYTE* dictPtr = (BYTE*)dictBuffer;
BYTE* dictLimit = dictPtr + dictSize - 12;
/* Find the repcodes */
while (dictPtr < dictLimit &&
(MEM_readLE32(dictPtr) != 1 || MEM_readLE32(dictPtr + 4) != 4 ||
MEM_readLE32(dictPtr + 8) != 8)) {
++dictPtr;
}
if (dictPtr >= dictLimit) goto _output_error;
MEM_writeLE32(dictPtr + 0, 10);
MEM_writeLE32(dictPtr + 4, 10);
MEM_writeLE32(dictPtr + 8, 10);
/* Set the last 8 bytes to 'x' */
memset((BYTE*)dictBuffer + dictSize - 8, 'x', 8);
}
/* The optimal parser checks all the repcodes.
* Make sure at least one is a match >= targetLength so that it is
* immediately chosen. This will make sure that the compressor and
* decompressor agree on at least one of the repcodes.
*/
{ size_t dSize;
BYTE data[1024];
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
ZSTD_compressionParameters const cParams = ZSTD_getCParams(19, CNBuffSize, dictSize);
ZSTD_CDict* const cdict = ZSTD_createCDict_advanced(dictBuffer, dictSize,
ZSTD_dlm_byRef, ZSTD_dct_auto,
cParams, ZSTD_defaultCMem);
assert(dctx != NULL); assert(cdict != NULL);
memset(data, 'x', sizeof(data));
cSize = ZSTD_compress_usingCDict(cctx, compressedBuffer, compressedBufferSize,
data, sizeof(data), cdict);
ZSTD_freeCDict(cdict);
if (ZSTD_isError(cSize)) { DISPLAYLEVEL(5, "Compression error %s : ", ZSTD_getErrorName(cSize)); goto _output_error; }
dSize = ZSTD_decompress_usingDict(dctx, decodedBuffer, sizeof(data), compressedBuffer, cSize, dictBuffer, dictSize);
if (ZSTD_isError(dSize)) { DISPLAYLEVEL(5, "Decompression error %s : ", ZSTD_getErrorName(dSize)); goto _output_error; }
if (memcmp(data, decodedBuffer, sizeof(data))) { DISPLAYLEVEL(5, "Data corruption : "); goto _output_error; }
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_decompressDCtx() with multiple ddicts : ", testNb++);
{
const size_t numDicts = 128;
const size_t numFrames = 4;
size_t i;
ZSTD_DCtx* dctx = ZSTD_createDCtx();
ZSTD_DDict** ddictTable = (ZSTD_DDict**)malloc(sizeof(ZSTD_DDict*)*numDicts);
ZSTD_CDict** cdictTable = (ZSTD_CDict**)malloc(sizeof(ZSTD_CDict*)*numDicts);
U32 dictIDSeed = seed;
/* Create new compressed buffer that will hold frames with differing dictIDs */
char* dictBufferMulti = (char*)malloc(sizeof(char) * dictBufferFixedSize); /* Modifiable copy of fixed full dict buffer */

ZSTD_memcpy(dictBufferMulti, dictBufferFixed, dictBufferFixedSize);
/* Create a bunch of DDicts with random dict IDs */
for (i = 0; i < numDicts; ++i) {
U32 currDictID = FUZ_rand(&dictIDSeed);
MEM_writeLE32(dictBufferMulti+ZSTD_FRAMEIDSIZE, currDictID);
ddictTable[i] = ZSTD_createDDict(dictBufferMulti, dictBufferFixedSize);
cdictTable[i] = ZSTD_createCDict(dictBufferMulti, dictBufferFixedSize, 3);
if (!ddictTable[i] || !cdictTable[i] || ZSTD_getDictID_fromCDict(cdictTable[i]) != ZSTD_getDictID_fromDDict(ddictTable[i])) {
goto _output_error;
}
}
/* Compress a few frames using random CDicts */
{
size_t off = 0;
/* only use the first half so we don't push against size limit of compressedBuffer */
size_t const segSize = (CNBuffSize / 2) / numFrames;
for (i = 0; i < numFrames; i++) {
size_t dictIdx = FUZ_rand(&dictIDSeed) % numDicts;
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
{ CHECK_NEWV(r, ZSTD_compress_usingCDict(cctx,
(BYTE*)compressedBuffer + off, CNBuffSize - off,
(BYTE*)CNBuffer + segSize * (size_t)i, segSize,
cdictTable[dictIdx]));
off += r;
}
}
cSize = off;
}

/* We should succeed to decompression even though different dicts were used on different frames */
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
ZSTD_DCtx_setParameter(dctx, ZSTD_d_refMultipleDDicts, ZSTD_rmd_refMultipleDDicts);
/* Reference every single ddict we made */
for (i = 0; i < numDicts; ++i) {
CHECK_Z( ZSTD_DCtx_refDDict(dctx, ddictTable[i]));
}
CHECK_Z( ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
/* Streaming decompression should also work */
{
ZSTD_inBuffer in = {compressedBuffer, cSize, 0};
ZSTD_outBuffer out = {decodedBuffer, CNBuffSize, 0};
while (in.pos < in.size) {
CHECK_Z(ZSTD_decompressStream(dctx, &out, &in));
}
}
ZSTD_freeDCtx(dctx);
for (i = 0; i < numDicts; ++i) {
ZSTD_freeCDict(cdictTable[i]);
ZSTD_freeDDict(ddictTable[i]);
}
free(dictBufferMulti);
free(ddictTable);
free(cdictTable);
}
DISPLAYLEVEL(3, "OK \n");

ZSTD_freeCCtx(cctx);
free(dictBuffer);
free(samplesSizes);
}

/* COVER dictionary builder tests */
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t dictSize = 16 KB;
size_t optDictSize = dictSize;
void* dictBuffer = malloc(dictSize);
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));
U32 seed32 = seed;
ZDICT_cover_params_t params;
U32 dictID;

if (dictBuffer==NULL || samplesSizes==NULL) {
free(dictBuffer);
free(samplesSizes);
goto _output_error;
}

DISPLAYLEVEL(3, "test%3i : ZDICT_trainFromBuffer_cover : ", testNb++);
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
memset(&params, 0, sizeof(params));
params.d = 1 + (FUZ_rand(&seed32) % 16);
params.k = params.d + (FUZ_rand(&seed32) % 256);
dictSize = ZDICT_trainFromBuffer_cover(dictBuffer, dictSize,
CNBuffer, samplesSizes, nbSamples,
params);
if (ZDICT_isError(dictSize)) goto _output_error;
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)dictSize);

DISPLAYLEVEL(3, "test%3i : check dictID : ", testNb++);
dictID = ZDICT_getDictID(dictBuffer, dictSize);
if (dictID==0) goto _output_error;
DISPLAYLEVEL(3, "OK : %u \n", (unsigned)dictID);

DISPLAYLEVEL(3, "test%3i : ZDICT_optimizeTrainFromBuffer_cover : ", testNb++);
memset(&params, 0, sizeof(params));
params.steps = 4;
optDictSize = ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, optDictSize,
CNBuffer, samplesSizes,
nbSamples / 4, &params);
if (ZDICT_isError(optDictSize)) goto _output_error;
DISPLAYLEVEL(3, "OK, created dictionary of size %u \n", (unsigned)optDictSize);

DISPLAYLEVEL(3, "test%3i : check dictID : ", testNb++);
dictID = ZDICT_getDictID(dictBuffer, optDictSize);
if (dictID==0) goto _output_error;
DISPLAYLEVEL(3, "OK : %u \n", (unsigned)dictID);

ZSTD_freeCCtx(cctx);
free(dictBuffer);
free(samplesSizes);
}

/* Decompression defense tests */
DISPLAYLEVEL(3, "test%3i : Check input length for magic number : ", testNb++);
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, CNBuffer, 3); /* too small input */
if (!ZSTD_isError(r)) goto _output_error;
if (ZSTD_getErrorCode(r) != ZSTD_error_srcSize_wrong) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Check magic Number : ", testNb++);
((char*)(CNBuffer))[0] = 1;
{ size_t const r = ZSTD_decompress(decodedBuffer, CNBuffSize, CNBuffer, 4);
if (!ZSTD_isError(r)) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

/* content size verification test */
DISPLAYLEVEL(3, "test%3i : Content size verification : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const srcSize = 5000;
size_t const wrongSrcSize = (srcSize + 1000);
ZSTD_parameters params = ZSTD_getParams(1, wrongSrcSize, 0);
params.fParams.contentSizeFlag = 1;
CHECK_Z( ZSTD_compressBegin_advanced(cctx, NULL, 0, params, wrongSrcSize) );
{ size_t const result = ZSTD_compressEnd(cctx, decodedBuffer, CNBuffSize, CNBuffer, srcSize);
if (!ZSTD_isError(result)) goto _output_error;
if (ZSTD_getErrorCode(result) != ZSTD_error_srcSize_wrong) goto _output_error;
DISPLAYLEVEL(3, "OK : %s \n", ZSTD_getErrorName(result));
}
ZSTD_freeCCtx(cctx);
}

/* negative compression level test : ensure simple API and advanced API produce same result */
DISPLAYLEVEL(3, "test%3i : negative compression level : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const srcSize = CNBuffSize / 5;
int const compressionLevel = -1;

assert(cctx != NULL);
{ size_t const cSize_1pass = ZSTD_compress(compressedBuffer, compressedBufferSize,
CNBuffer, srcSize, compressionLevel);
if (ZSTD_isError(cSize_1pass)) goto _output_error;

CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, compressionLevel) );
{ size_t const compressionResult = ZSTD_compress2(cctx,
compressedBuffer, compressedBufferSize,
CNBuffer, srcSize);
DISPLAYLEVEL(5, "simple=%zu vs %zu=advanced : ", cSize_1pass, compressionResult);
if (ZSTD_isError(compressionResult)) goto _output_error;
if (compressionResult != cSize_1pass) goto _output_error;
} }
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

/* parameters order test */
{ size_t const inputSize = CNBuffSize / 2;
U64 xxh64;

{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
DISPLAYLEVEL(3, "test%3i : parameters in order : ", testNb++);
assert(cctx != NULL);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 2) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, 18) );
{ size_t const compressedSize = ZSTD_compress2(cctx,
compressedBuffer, ZSTD_compressBound(inputSize),
CNBuffer, inputSize);
CHECK_Z(compressedSize);
cSize = compressedSize;
xxh64 = XXH64(compressedBuffer, compressedSize, 0);
}
DISPLAYLEVEL(3, "OK (compress : %u -> %u bytes)\n", (unsigned)inputSize, (unsigned)cSize);
ZSTD_freeCCtx(cctx);
}

{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
DISPLAYLEVEL(3, "test%3i : parameters disordered : ", testNb++);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_windowLog, 18) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable) );
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 2) );
{ size_t const result = ZSTD_compress2(cctx,
compressedBuffer, ZSTD_compressBound(inputSize),
CNBuffer, inputSize);
CHECK_Z(result);
if (result != cSize) goto _output_error; /* must result in same compressed result, hence same size */
if (XXH64(compressedBuffer, result, 0) != xxh64) goto _output_error; /* must result in exactly same content, hence same hash */
DISPLAYLEVEL(3, "OK (compress : %u -> %u bytes)\n", (unsigned)inputSize, (unsigned)result);
}
ZSTD_freeCCtx(cctx);
}
}

/* advanced parameters for decompression */
{ ZSTD_DCtx* const dctx = ZSTD_createDCtx();
assert(dctx != NULL);

DISPLAYLEVEL(3, "test%3i : get dParameter bounds ", testNb++);
{ ZSTD_bounds const bounds = ZSTD_dParam_getBounds(ZSTD_d_windowLogMax);
CHECK_Z(bounds.error);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : wrong dParameter : ", testNb++);
{ size_t const sr = ZSTD_DCtx_setParameter(dctx, (ZSTD_dParameter)999999, 0);
if (!ZSTD_isError(sr)) goto _output_error;
}
{ ZSTD_bounds const bounds = ZSTD_dParam_getBounds((ZSTD_dParameter)999998);
if (!ZSTD_isError(bounds.error)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : out of bound dParameter : ", testNb++);
{ size_t const sr = ZSTD_DCtx_setParameter(dctx, ZSTD_d_windowLogMax, 9999);
if (!ZSTD_isError(sr)) goto _output_error;
}
{ size_t const sr = ZSTD_DCtx_setParameter(dctx, ZSTD_d_format, (ZSTD_format_e)888);
if (!ZSTD_isError(sr)) goto _output_error;
}
DISPLAYLEVEL(3, "OK \n");

ZSTD_freeDCtx(dctx);
}

/* custom formats tests */
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
size_t const inputSize = CNBuffSize / 2; /* won't cause pb with small dict size */
assert(dctx != NULL); assert(cctx != NULL);

/* basic block compression */
DISPLAYLEVEL(3, "test%3i : magic-less format test : ", testNb++);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_format, ZSTD_f_zstd1_magicless) );
{ ZSTD_inBuffer in = { CNBuffer, inputSize, 0 };
ZSTD_outBuffer out = { compressedBuffer, ZSTD_compressBound(inputSize), 0 };
size_t const result = ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end);
if (result != 0) goto _output_error;
if (in.pos != in.size) goto _output_error;
cSize = out.pos;
}
DISPLAYLEVEL(3, "OK (compress : %u -> %u bytes)\n", (unsigned)inputSize, (unsigned)cSize);

DISPLAYLEVEL(3, "test%3i : decompress normally (should fail) : ", testNb++);
{ size_t const decodeResult = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (ZSTD_getErrorCode(decodeResult) != ZSTD_error_prefix_unknown) goto _output_error;
DISPLAYLEVEL(3, "OK : %s \n", ZSTD_getErrorName(decodeResult));
}

DISPLAYLEVEL(3, "test%3i : decompress of magic-less frame : ", testNb++);
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_DCtx_setParameter(dctx, ZSTD_d_format, ZSTD_f_zstd1_magicless) );
{ ZSTD_frameHeader zfh;
size_t const zfhrt = ZSTD_getFrameHeader_advanced(&zfh, compressedBuffer, cSize, ZSTD_f_zstd1_magicless);
if (zfhrt != 0) goto _output_error;
}
/* one shot */
{ size_t const result = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (result != inputSize) goto _output_error;
DISPLAYLEVEL(3, "one-shot OK, ");
}
/* streaming */
{ ZSTD_inBuffer in = { compressedBuffer, cSize, 0 };
ZSTD_outBuffer out = { decodedBuffer, CNBuffSize, 0 };
size_t const result = ZSTD_decompressStream(dctx, &out, &in);
if (result != 0) goto _output_error;
if (in.pos != in.size) goto _output_error;
if (out.pos != inputSize) goto _output_error;
DISPLAYLEVEL(3, "streaming OK : regenerated %u bytes \n", (unsigned)out.pos);
}

/* basic block compression */
DISPLAYLEVEL(3, "test%3i : empty magic-less format test : ", testNb++);
CHECK_Z( ZSTD_CCtx_setParameter(cctx, ZSTD_c_format, ZSTD_f_zstd1_magicless) );
{ ZSTD_inBuffer in = { CNBuffer, 0, 0 };
ZSTD_outBuffer out = { compressedBuffer, ZSTD_compressBound(0), 0 };
size_t const result = ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end);
if (result != 0) goto _output_error;
if (in.pos != in.size) goto _output_error;
cSize = out.pos;
}
DISPLAYLEVEL(3, "OK (compress : %u -> %u bytes)\n", (unsigned)0, (unsigned)cSize);

DISPLAYLEVEL(3, "test%3i : decompress of empty magic-less frame : ", testNb++);
ZSTD_DCtx_reset(dctx, ZSTD_reset_session_and_parameters);
CHECK_Z( ZSTD_DCtx_setParameter(dctx, ZSTD_d_format, ZSTD_f_zstd1_magicless) );
/* one shot */
{ size_t const result = ZSTD_decompressDCtx(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize);
if (result != 0) goto _output_error;
DISPLAYLEVEL(3, "one-shot OK, ");
}
/* streaming */
{ ZSTD_inBuffer in = { compressedBuffer, cSize, 0 };
ZSTD_outBuffer out = { decodedBuffer, CNBuffSize, 0 };
size_t const result = ZSTD_decompressStream(dctx, &out, &in);
if (result != 0) goto _output_error;
if (in.pos != in.size) goto _output_error;
if (out.pos != 0) goto _output_error;
DISPLAYLEVEL(3, "streaming OK : regenerated %u bytes \n", (unsigned)out.pos);
}

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
}

DISPLAYLEVEL(3, "test%3i : Decompression parameter reset test : ", testNb++);
{
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
/* Attempt to future proof this to new parameters. */
int const maxParam = 2000;
int param;
if (ZSTD_d_experimentalParam3 > maxParam) goto _output_error;
for (param = 0; param < maxParam; ++param) {
ZSTD_dParameter dParam = (ZSTD_dParameter)param;
ZSTD_bounds bounds = ZSTD_dParam_getBounds(dParam);
int value1;
int value2;
int check;
if (ZSTD_isError(bounds.error))
continue;
CHECK_Z(ZSTD_DCtx_getParameter(dctx, dParam, &value1));
value2 = (value1 != bounds.lowerBound) ? bounds.lowerBound : bounds.upperBound;
CHECK_Z(ZSTD_DCtx_setParameter(dctx, dParam, value2));
CHECK_Z(ZSTD_DCtx_getParameter(dctx, dParam, &check));
if (check != value2) goto _output_error;
CHECK_Z(ZSTD_DCtx_reset(dctx, ZSTD_reset_parameters));
CHECK_Z(ZSTD_DCtx_getParameter(dctx, dParam, &check));
if (check != value1) goto _output_error;
}
ZSTD_freeDCtx(dctx);
}
DISPLAYLEVEL(3, "OK \n");

/* block API tests */
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
static const size_t dictSize = 65 KB;
static const size_t blockSize = 100 KB; /* won't cause pb with small dict size */
size_t cSize2;
assert(cctx != NULL); assert(dctx != NULL);

/* basic block compression */
DISPLAYLEVEL(3, "test%3i : Block compression test : ", testNb++);
CHECK_Z( ZSTD_compressBegin(cctx, 5) );
CHECK_Z( ZSTD_getBlockSize(cctx) >= blockSize);
CHECK_VAR(cSize, ZSTD_compressBlock(cctx, compressedBuffer, ZSTD_compressBound(blockSize), CNBuffer, blockSize) );
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Block decompression test : ", testNb++);
CHECK_Z( ZSTD_decompressBegin(dctx) );
{ CHECK_NEWV(r, ZSTD_decompressBlock(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize) );
if (r != blockSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

/* very long stream of block compression */
DISPLAYLEVEL(3, "test%3i : Huge block streaming compression test : ", testNb++);
CHECK_Z( ZSTD_compressBegin(cctx, -199) ); /* we just want to quickly overflow internal U32 index */
CHECK_Z( ZSTD_getBlockSize(cctx) >= blockSize);
{ U64 const toCompress = 5000000000ULL; /* > 4 GB */
U64 compressed = 0;
while (compressed < toCompress) {
size_t const blockCSize = ZSTD_compressBlock(cctx, compressedBuffer, ZSTD_compressBound(blockSize), CNBuffer, blockSize);
assert(blockCSize != 0);
if (ZSTD_isError(blockCSize)) goto _output_error;
compressed += blockCSize;
} }
DISPLAYLEVEL(3, "OK \n");

/* dictionary block compression */
DISPLAYLEVEL(3, "test%3i : Dictionary Block compression test : ", testNb++);
CHECK_Z( ZSTD_compressBegin_usingDict(cctx, CNBuffer, dictSize, 5) );
CHECK_VAR(cSize, ZSTD_compressBlock(cctx, compressedBuffer, ZSTD_compressBound(blockSize), (char*)CNBuffer+dictSize, blockSize));
RDG_genBuffer((char*)CNBuffer+dictSize+blockSize, blockSize, 0.0, 0.0, seed); /* create a non-compressible second block */
{ CHECK_NEWV(r, ZSTD_compressBlock(cctx, (char*)compressedBuffer+cSize, ZSTD_compressBound(blockSize), (char*)CNBuffer+dictSize+blockSize, blockSize) ); /* for cctx history consistency */
assert(r == 0); /* non-compressible block */ }
memcpy((char*)compressedBuffer+cSize, (char*)CNBuffer+dictSize+blockSize, blockSize); /* send non-compressed block (without header) */
CHECK_VAR(cSize2, ZSTD_compressBlock(cctx, (char*)compressedBuffer+cSize+blockSize, ZSTD_compressBound(blockSize),
(char*)CNBuffer+dictSize+2*blockSize, blockSize));
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Dictionary Block decompression test : ", testNb++);
CHECK_Z( ZSTD_decompressBegin_usingDict(dctx, CNBuffer, dictSize) );
{ CHECK_NEWV( r, ZSTD_decompressBlock(dctx, decodedBuffer, blockSize, compressedBuffer, cSize) );
if (r != blockSize) {
DISPLAYLEVEL(1, "ZSTD_decompressBlock() with _usingDict() fails : %u, instead of %u expected \n", (unsigned)r, (unsigned)blockSize);
goto _output_error;
} }
memcpy((char*)decodedBuffer+blockSize, (char*)compressedBuffer+cSize, blockSize);
ZSTD_insertBlock(dctx, (char*)decodedBuffer+blockSize, blockSize); /* insert non-compressed block into dctx history */
{ CHECK_NEWV( r, ZSTD_decompressBlock(dctx, (char*)decodedBuffer+2*blockSize, blockSize, (char*)compressedBuffer+cSize+blockSize, cSize2) );
if (r != blockSize) {
DISPLAYLEVEL(1, "ZSTD_decompressBlock() with _usingDict() and after insertBlock() fails : %u, instead of %u expected \n", (unsigned)r, (unsigned)blockSize);
goto _output_error;
} }
assert(memcpy((char*)CNBuffer+dictSize, decodedBuffer, blockSize*3)); /* ensure regenerated content is identical to origin */
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : Block compression with CDict : ", testNb++);
{ ZSTD_CDict* const cdict = ZSTD_createCDict(CNBuffer, dictSize, 3);
if (cdict==NULL) goto _output_error;
CHECK_Z( ZSTD_compressBegin_usingCDict(cctx, cdict) );
CHECK_Z( ZSTD_compressBlock(cctx, compressedBuffer, ZSTD_compressBound(blockSize), (char*)CNBuffer+dictSize, blockSize) );
ZSTD_freeCDict(cdict);
}
DISPLAYLEVEL(3, "OK \n");

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
}

/* long rle test */
{ size_t sampleSize = 0;
size_t expectedCompressedSize = 39; /* block 1, 2: compressed, block 3: RLE, zstd 1.4.4 */
DISPLAYLEVEL(3, "test%3i : Long RLE test : ", testNb++);
memset((char*)CNBuffer+sampleSize, 'B', 256 KB - 1);
sampleSize += 256 KB - 1;
memset((char*)CNBuffer+sampleSize, 'A', 96 KB);
sampleSize += 96 KB;
cSize = ZSTD_compress(compressedBuffer, ZSTD_compressBound(sampleSize), CNBuffer, sampleSize, 1);
if (ZSTD_isError(cSize) || cSize > expectedCompressedSize) goto _output_error;
{ CHECK_NEWV(regenSize, ZSTD_decompress(decodedBuffer, sampleSize, compressedBuffer, cSize));
if (regenSize!=sampleSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");
}

DISPLAYLEVEL(3, "test%3i : ZSTD_generateSequences decode from sequences test : ", testNb++);
{
size_t srcSize = 150 KB;
BYTE* src = (BYTE*)CNBuffer;
BYTE* decoded = (BYTE*)compressedBuffer;

ZSTD_CCtx* cctx = ZSTD_createCCtx();
ZSTD_Sequence* seqs = (ZSTD_Sequence*)malloc(srcSize * sizeof(ZSTD_Sequence));
size_t seqsSize;

if (seqs == NULL) goto _output_error;
assert(cctx != NULL);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19);
/* Populate src with random data */
RDG_genBuffer(CNBuffer, srcSize, compressibility, 0.5, seed);

/* Test with block delimiters roundtrip */
seqsSize = ZSTD_generateSequences(cctx, seqs, srcSize, src, srcSize);
CHECK_Z(seqsSize);
FUZ_decodeSequences(decoded, seqs, seqsSize, src, srcSize, ZSTD_sf_explicitBlockDelimiters);
assert(!memcmp(CNBuffer, compressedBuffer, srcSize));

/* Test no block delimiters roundtrip */
seqsSize = ZSTD_mergeBlockDelimiters(seqs, seqsSize);
CHECK_Z(seqsSize);
FUZ_decodeSequences(decoded, seqs, seqsSize, src, srcSize, ZSTD_sf_noBlockDelimiters);
assert(!memcmp(CNBuffer, compressedBuffer, srcSize));

ZSTD_freeCCtx(cctx);
free(seqs);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_generateSequences too small output buffer : ", testNb++);
{
const size_t seqsCapacity = 10;
const size_t srcSize = 150 KB;
const BYTE* src = (BYTE*)CNBuffer;

ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_Sequence* const seqs = (ZSTD_Sequence*)malloc(seqsCapacity * sizeof(ZSTD_Sequence));

if (seqs == NULL) goto _output_error;
if (cctx == NULL) goto _output_error;
/* Populate src with random data */
RDG_genBuffer(CNBuffer, srcSize, compressibility, 0.5, seed);

/* Test with block delimiters roundtrip */
{
size_t const seqsSize = ZSTD_generateSequences(cctx, seqs, seqsCapacity, src, srcSize);
if (!ZSTD_isError(seqsSize)) goto _output_error;
}

ZSTD_freeCCtx(cctx);
free(seqs);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_getSequences followed by ZSTD_compressSequences : ", testNb++);
{
const size_t srcSize = 500 KB;
const BYTE* const src = (BYTE*)CNBuffer;
BYTE* const dst = (BYTE*)compressedBuffer;
const size_t dstCapacity = ZSTD_compressBound(srcSize);
const size_t decompressSize = srcSize;
char* const decompressBuffer = (char*)malloc(decompressSize);
size_t compressedSize;

ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_Sequence* const seqs = (ZSTD_Sequence*)malloc(srcSize * sizeof(ZSTD_Sequence));
size_t nbSeqs;

if (seqs == NULL) goto _output_error;
assert(cctx != NULL);

/* Populate src with random data */
RDG_genBuffer(CNBuffer, srcSize, compressibility, 0., seed);

/* Roundtrip Test with block delimiters generated by ZSTD_generateSequences() */
nbSeqs = ZSTD_generateSequences(cctx, seqs, srcSize, src, srcSize);
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_blockDelimiters, ZSTD_sf_explicitBlockDelimiters);
compressedSize = ZSTD_compressSequences(cctx, dst, dstCapacity, seqs, nbSeqs, src, srcSize);
if (ZSTD_isError(compressedSize)) {
DISPLAY("Error in sequence compression with block delims\n");
goto _output_error;
}
{ size_t const dSize = ZSTD_decompress(decompressBuffer, decompressSize, dst, compressedSize);
if (ZSTD_isError(dSize)) {
DISPLAY("Error in sequence compression roundtrip with block delims\n");
goto _output_error;
} }
assert(!memcmp(decompressBuffer, src, srcSize));

/* Roundtrip Test with no block delimiters */
{ size_t const nbSeqsAfterMerge = ZSTD_mergeBlockDelimiters(seqs, nbSeqs);
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
ZSTD_CCtx_setParameter(cctx, ZSTD_c_blockDelimiters, ZSTD_sf_noBlockDelimiters);
compressedSize = ZSTD_compressSequences(cctx, dst, dstCapacity, seqs, nbSeqsAfterMerge, src, srcSize);
}
if (ZSTD_isError(compressedSize)) {
DISPLAY("Error in sequence compression with no block delims\n");
goto _output_error;
}
{ size_t const dSize = ZSTD_decompress(decompressBuffer, decompressSize, dst, compressedSize);
if (ZSTD_isError(dSize)) {
DISPLAY("Error in sequence compression roundtrip with no block delims\n");
goto _output_error;
} }
assert(!memcmp(decompressBuffer, src, srcSize));

ZSTD_freeCCtx(cctx);
free(decompressBuffer);
free(seqs);
}
DISPLAYLEVEL(3, "OK \n");

/* Multiple blocks of zeros test */
#define LONGZEROSLENGTH 1000000 /* 1MB of zeros */
DISPLAYLEVEL(3, "test%3i : compress %u zeroes : ", testNb++, LONGZEROSLENGTH);
memset(CNBuffer, 0, LONGZEROSLENGTH);
CHECK_VAR(cSize, ZSTD_compress(compressedBuffer, ZSTD_compressBound(LONGZEROSLENGTH), CNBuffer, LONGZEROSLENGTH, 1) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/LONGZEROSLENGTH*100);

DISPLAYLEVEL(3, "test%3i : decompress %u zeroes : ", testNb++, LONGZEROSLENGTH);
{ CHECK_NEWV(r, ZSTD_decompress(decodedBuffer, LONGZEROSLENGTH, compressedBuffer, cSize) );
if (r != LONGZEROSLENGTH) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

/* All zeroes test (test bug #137) */
#define ZEROESLENGTH 100
DISPLAYLEVEL(3, "test%3i : compress %u zeroes : ", testNb++, ZEROESLENGTH);
memset(CNBuffer, 0, ZEROESLENGTH);
CHECK_VAR(cSize, ZSTD_compress(compressedBuffer, ZSTD_compressBound(ZEROESLENGTH), CNBuffer, ZEROESLENGTH, 1) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/ZEROESLENGTH*100);

DISPLAYLEVEL(3, "test%3i : decompress %u zeroes : ", testNb++, ZEROESLENGTH);
{ CHECK_NEWV(r, ZSTD_decompress(decodedBuffer, ZEROESLENGTH, compressedBuffer, cSize) );
if (r != ZEROESLENGTH) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

/* nbSeq limit test */
#define _3BYTESTESTLENGTH 131000
#define NB3BYTESSEQLOG 9
#define NB3BYTESSEQ (1 << NB3BYTESSEQLOG)
#define NB3BYTESSEQMASK (NB3BYTESSEQ-1)
/* creates a buffer full of 3-bytes sequences */
{ BYTE _3BytesSeqs[NB3BYTESSEQ][3];
U32 rSeed = 1;

/* create batch of 3-bytes sequences */
{ int i;
for (i=0; i < NB3BYTESSEQ; i++) {
_3BytesSeqs[i][0] = (BYTE)(FUZ_rand(&rSeed) & 255);
_3BytesSeqs[i][1] = (BYTE)(FUZ_rand(&rSeed) & 255);
_3BytesSeqs[i][2] = (BYTE)(FUZ_rand(&rSeed) & 255);
} }

/* randomly fills CNBuffer with prepared 3-bytes sequences */
{ int i;
for (i=0; i < _3BYTESTESTLENGTH; i += 3) { /* note : CNBuffer size > _3BYTESTESTLENGTH+3 */
U32 const id = FUZ_rand(&rSeed) & NB3BYTESSEQMASK;
((BYTE*)CNBuffer)[i+0] = _3BytesSeqs[id][0];
((BYTE*)CNBuffer)[i+1] = _3BytesSeqs[id][1];
((BYTE*)CNBuffer)[i+2] = _3BytesSeqs[id][2];
} } }
DISPLAYLEVEL(3, "test%3i : growing nbSeq : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const maxNbSeq = _3BYTESTESTLENGTH / 3;
size_t const bound = ZSTD_compressBound(_3BYTESTESTLENGTH);
size_t nbSeq = 1;
while (nbSeq <= maxNbSeq) {
CHECK_Z(ZSTD_compressCCtx(cctx, compressedBuffer, bound, CNBuffer, nbSeq * 3, 19));
/* Check every sequence for the first 100, then skip more rapidly. */
if (nbSeq < 100) {
++nbSeq;
} else {
nbSeq += (nbSeq >> 2);
}
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : compress lots 3-bytes sequences : ", testNb++);
CHECK_VAR(cSize, ZSTD_compress(compressedBuffer, ZSTD_compressBound(_3BYTESTESTLENGTH),
CNBuffer, _3BYTESTESTLENGTH, 19) );
DISPLAYLEVEL(3, "OK (%u bytes : %.2f%%)\n", (unsigned)cSize, (double)cSize/_3BYTESTESTLENGTH*100);

DISPLAYLEVEL(3, "test%3i : decompress lots 3-bytes sequence : ", testNb++);
{ CHECK_NEWV(r, ZSTD_decompress(decodedBuffer, _3BYTESTESTLENGTH, compressedBuffer, cSize) );
if (r != _3BYTESTESTLENGTH) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : growing literals buffer : ", testNb++);
RDG_genBuffer(CNBuffer, CNBuffSize, 0.0, 0.1, seed);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t const bound = ZSTD_compressBound(CNBuffSize);
size_t size = 1;
while (size <= CNBuffSize) {
CHECK_Z(ZSTD_compressCCtx(cctx, compressedBuffer, bound, CNBuffer, size, 3));
/* Check every size for the first 100, then skip more rapidly. */
if (size < 100) {
++size;
} else {
size += (size >> 2);
}
}
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : incompressible data and ill suited dictionary : ", testNb++);
{ /* Train a dictionary on low characters */
size_t dictSize = 16 KB;
void* const dictBuffer = malloc(dictSize);
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));
if (!dictBuffer || !samplesSizes) goto _output_error;
{ U32 u; for (u=0; u<nbSamples; u++) samplesSizes[u] = sampleUnitSize; }
dictSize = ZDICT_trainFromBuffer(dictBuffer, dictSize, CNBuffer, samplesSizes, nbSamples);
if (ZDICT_isError(dictSize)) goto _output_error;
/* Reverse the characters to make the dictionary ill suited */
{ U32 u;
for (u = 0; u < CNBuffSize; ++u) {
((BYTE*)CNBuffer)[u] = 255 - ((BYTE*)CNBuffer)[u];
} }
{ /* Compress the data */
size_t const inputSize = 500;
size_t const outputSize = ZSTD_compressBound(inputSize);
void* const outputBuffer = malloc(outputSize);
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
if (!outputBuffer || !cctx) goto _output_error;
CHECK_Z(ZSTD_compress_usingDict(cctx, outputBuffer, outputSize, CNBuffer, inputSize, dictBuffer, dictSize, 1));
free(outputBuffer);
ZSTD_freeCCtx(cctx);
}

free(dictBuffer);
free(samplesSizes);
}
DISPLAYLEVEL(3, "OK \n");

/* findFrameCompressedSize on skippable frames */
DISPLAYLEVEL(3, "test%3i : frame compressed size of skippable frame : ", testNb++);
{ const char* frame = "\x50\x2a\x4d\x18\x05\x0\x0\0abcde";
size_t const frameSrcSize = 13;
if (ZSTD_findFrameCompressedSize(frame, frameSrcSize) != frameSrcSize) goto _output_error; }
DISPLAYLEVEL(3, "OK \n");

/* error string tests */
DISPLAYLEVEL(3, "test%3i : testing ZSTD error code strings : ", testNb++);
if (strcmp("No error detected", ZSTD_getErrorName((ZSTD_ErrorCode)(0-ZSTD_error_no_error))) != 0) goto _output_error;
if (strcmp("No error detected", ZSTD_getErrorString(ZSTD_error_no_error)) != 0) goto _output_error;
if (strcmp("Unspecified error code", ZSTD_getErrorString((ZSTD_ErrorCode)(0-ZSTD_error_GENERIC))) != 0) goto _output_error;
if (strcmp("Error (generic)", ZSTD_getErrorName((size_t)0-ZSTD_error_GENERIC)) != 0) goto _output_error;
if (strcmp("Error (generic)", ZSTD_getErrorString(ZSTD_error_GENERIC)) != 0) goto _output_error;
if (strcmp("No error detected", ZSTD_getErrorName(ZSTD_error_GENERIC)) != 0) goto _output_error;
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing ZSTD dictionary sizes : ", testNb++);
RDG_genBuffer(CNBuffer, CNBuffSize, compressibility, 0., seed);
{
size_t const size = MIN(128 KB, CNBuffSize);
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_CDict* const lgCDict = ZSTD_createCDict(CNBuffer, size, 1);
ZSTD_CDict* const smCDict = ZSTD_createCDict(CNBuffer, 1 KB, 1);
ZSTD_frameHeader lgHeader;
ZSTD_frameHeader smHeader;

CHECK_Z(ZSTD_compress_usingCDict(cctx, compressedBuffer, compressedBufferSize, CNBuffer, size, lgCDict));
CHECK_Z(ZSTD_getFrameHeader(&lgHeader, compressedBuffer, compressedBufferSize));
CHECK_Z(ZSTD_compress_usingCDict(cctx, compressedBuffer, compressedBufferSize, CNBuffer, size, smCDict));
CHECK_Z(ZSTD_getFrameHeader(&smHeader, compressedBuffer, compressedBufferSize));

if (lgHeader.windowSize != smHeader.windowSize) goto _output_error;

ZSTD_freeCDict(smCDict);
ZSTD_freeCDict(lgCDict);
ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing FSE_normalizeCount() PR#1255: ", testNb++);
{
short norm[32];
unsigned count[32];
unsigned const tableLog = 5;
size_t const nbSeq = 32;
unsigned const maxSymbolValue = 31;
size_t i;

for (i = 0; i < 32; ++i)
count[i] = 1;
/* Calling FSE_normalizeCount() on a uniform distribution should not
* cause a division by zero.
*/
FSE_normalizeCount(norm, tableLog, count, nbSeq, maxSymbolValue, /* useLowProbCount */ 1);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing FSE_writeNCount() PR#2779: ", testNb++);
{
size_t const outBufSize = 9;
short const count[11] = {1, 0, 1, 0, 1, 0, 1, 0, 1, 9, 18};
unsigned const tableLog = 5;
unsigned const maxSymbolValue = 10;
BYTE* outBuf = (BYTE*)malloc(outBufSize*sizeof(BYTE));

/* Ensure that this write doesn't write out of bounds, and that
* FSE_writeNCount_generic() is *not* called with writeIsSafe == 1.
*/
FSE_writeNCount(outBuf, outBufSize, count, maxSymbolValue, tableLog);
free(outBuf);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : testing bitwise intrinsics PR#3045: ", testNb++);
{
U32 seed_copy = seed; /* need non-const seed to avoid compiler warning for FUZ_rand(&seed) */
U32 rand32 = FUZ_rand(&seed_copy);
U64 rand64 = ((U64)FUZ_rand(&seed_copy) << 32) | FUZ_rand(&seed_copy);
U32 lowbit_only_32 = 1;
U64 lowbit_only_64 = 1;
U32 highbit_only_32 = (U32)1 << 31;
U64 highbit_only_64 = (U64)1 << 63;
U32 i;
if (rand32 == 0) rand32 = 1; /* CLZ and CTZ are undefined on 0 */
if (rand64 == 0) rand64 = 1; /* CLZ and CTZ are undefined on 0 */

/* Test ZSTD_countTrailingZeros32 */
CHECK_EQ(ZSTD_countTrailingZeros32(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_countTrailingZeros32(highbit_only_32), 31u);
CHECK_EQ(ZSTD_countTrailingZeros32(rand32), ZSTD_countTrailingZeros32_fallback(rand32));

/* Test ZSTD_countLeadingZeros32 */
CHECK_EQ(ZSTD_countLeadingZeros32(lowbit_only_32), 31u);
CHECK_EQ(ZSTD_countLeadingZeros32(highbit_only_32), 0u);
CHECK_EQ(ZSTD_countLeadingZeros32(rand32), ZSTD_countLeadingZeros32_fallback(rand32));

/* Test ZSTD_countTrailingZeros64 */
CHECK_EQ(ZSTD_countTrailingZeros64(lowbit_only_64), 0u);
CHECK_EQ(ZSTD_countTrailingZeros64(highbit_only_64), 63u);

/* Test ZSTD_countLeadingZeros64 */
CHECK_EQ(ZSTD_countLeadingZeros64(lowbit_only_64), 63u);
CHECK_EQ(ZSTD_countLeadingZeros64(highbit_only_64), 0u);

/* Test ZSTD_highbit32 */
CHECK_EQ(ZSTD_highbit32(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_highbit32(highbit_only_32), 31u);

/* Test ZSTD_NbCommonBytes */
if (MEM_isLittleEndian()) {
if (MEM_64bits()) {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 3u);
} else {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 0u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 3u);
}
} else {
if (MEM_64bits()) {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 7u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 4u);
} else {
CHECK_EQ(ZSTD_NbCommonBytes(lowbit_only_32), 3u);
CHECK_EQ(ZSTD_NbCommonBytes(highbit_only_32), 0u);
}
}

/* Test MEM_ intrinsics */
CHECK_EQ(MEM_swap32(rand32), MEM_swap32_fallback(rand32));
CHECK_EQ(MEM_swap64(rand64), MEM_swap64_fallback(rand64));

/* Test fallbacks vs intrinsics on a range of small integers */
for (i=1; i <= 1000; i++) {
CHECK_EQ(MEM_swap32(i), MEM_swap32_fallback(i));
CHECK_EQ(MEM_swap64((U64)i), MEM_swap64_fallback((U64)i));
CHECK_EQ(ZSTD_countTrailingZeros32(i), ZSTD_countTrailingZeros32_fallback(i));
CHECK_EQ(ZSTD_countLeadingZeros32(i), ZSTD_countLeadingZeros32_fallback(i));
}
}
DISPLAYLEVEL(3, "OK \n");

#ifdef ZSTD_MULTITHREAD
DISPLAYLEVEL(3, "test%3i : passing wrong full dict should fail on compressStream2 refPrefix ", testNb++);
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
size_t const srcSize = 1 MB + 5; /* A little more than ZSTDMT_JOBSIZE_MIN */
size_t const dstSize = ZSTD_compressBound(srcSize);
void* const src = CNBuffer;
void* const dst = compressedBuffer;
void* dict = (void*)malloc(srcSize);

RDG_genBuffer(src, srcSize, compressibility, 0.5, seed);
RDG_genBuffer(dict, srcSize, compressibility, 0., seed);

/* Make sure there is no ZSTD_MAGIC_NUMBER */
memset(dict, 0, sizeof(U32));

/* something more than 1 */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 2));
/* lie and claim this is a full dict */
CHECK_Z(ZSTD_CCtx_refPrefix_advanced(cctx, dict, srcSize, ZSTD_dct_fullDict));

{ ZSTD_outBuffer out = {dst, dstSize, 0};
ZSTD_inBuffer in = {src, srcSize, 0};
/* should fail because its not a full dict like we said it was */
assert(ZSTD_isError(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush)));
}

ZSTD_freeCCtx(cctx);
free(dict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : small dictionary with multithreading and LDM ", testNb++);
{ ZSTD_CCtx* cctx = ZSTD_createCCtx();
size_t const srcSize = 1 MB + 5; /* A little more than ZSTDMT_JOBSIZE_MIN */
size_t const dictSize = 10;
size_t const dstSize = ZSTD_compressBound(srcSize);
void* const src = CNBuffer;
void* const dst = compressedBuffer;
void* dict = (void*)malloc(dictSize);

RDG_genBuffer(src, srcSize, compressibility, 0.5, seed);
RDG_genBuffer(dict, dictSize, compressibility, 0., seed);

/* Make sure there is no ZSTD_MAGIC_NUMBER */
memset(dict, 0, sizeof(U32));

/* Enable MT, LDM, and use refPrefix() for a small dict */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_nbWorkers, 2));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable));
CHECK_Z(ZSTD_CCtx_refPrefix(cctx, dict, dictSize));

CHECK_Z(ZSTD_compress2(cctx, dst, dstSize, src, srcSize));

ZSTD_freeCCtx(cctx);
free(dict);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_getCParams() + dictionary ", testNb++);
{
ZSTD_compressionParameters const medium = ZSTD_getCParams(1, 16*1024-1, 0);
ZSTD_compressionParameters const large = ZSTD_getCParams(1, 128*1024-1, 0);
ZSTD_compressionParameters const smallDict = ZSTD_getCParams(1, 0, 400);
ZSTD_compressionParameters const mediumDict = ZSTD_getCParams(1, 0, 10000);
ZSTD_compressionParameters const largeDict = ZSTD_getCParams(1, 0, 100000);

assert(!memcmp(&smallDict, &mediumDict, sizeof(smallDict)));
assert(!memcmp(&medium, &mediumDict, sizeof(medium)));
assert(!memcmp(&large, &largeDict, sizeof(large)));
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : ZSTD_adjustCParams() + dictionary ", testNb++);
{
ZSTD_compressionParameters const cParams = ZSTD_getCParams(1, 0, 0);
ZSTD_compressionParameters const smallDict = ZSTD_adjustCParams(cParams, 0, 400);
ZSTD_compressionParameters const smallSrcAndDict = ZSTD_adjustCParams(cParams, 500, 400);

assert(smallSrcAndDict.windowLog == 10);
assert(!memcmp(&cParams, &smallDict, sizeof(cParams)));
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : check compression mem usage monotonicity over levels for estimateCCtxSize() : ", testNb++);
{
int level = 1;
size_t prevSize = 0;
for (; level < ZSTD_maxCLevel(); ++level) {
size_t const currSize = ZSTD_estimateCCtxSize(level);
if (prevSize > currSize) {
DISPLAYLEVEL(3, "Error! previous cctx size: %zu at level: %d is larger than current cctx size: %zu at level: %d",
prevSize, level-1, currSize, level);
goto _output_error;
}
prevSize = currSize;
}
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : check estimateCCtxSize() always larger or equal to ZSTD_estimateCCtxSize_usingCParams() : ", testNb++);
{
size_t const kSizeIncrement = 2 KB;
int level = -3;

for (; level <= ZSTD_maxCLevel(); ++level) {
size_t dictSize = 0;
for (; dictSize <= 256 KB; dictSize += 8 * kSizeIncrement) {
size_t srcSize = 2 KB;
for (; srcSize < 300 KB; srcSize += kSizeIncrement) {
ZSTD_compressionParameters const cParams = ZSTD_getCParams(level, srcSize, dictSize);
size_t const cctxSizeUsingCParams = ZSTD_estimateCCtxSize_usingCParams(cParams);
size_t const cctxSizeUsingLevel = ZSTD_estimateCCtxSize(level);
if (cctxSizeUsingLevel < cctxSizeUsingCParams
|| ZSTD_isError(cctxSizeUsingCParams)
|| ZSTD_isError(cctxSizeUsingLevel)) {
DISPLAYLEVEL(3, "error! l: %d dict: %zu srcSize: %zu cctx size cpar: %zu, cctx size level: %zu\n",
level, dictSize, srcSize, cctxSizeUsingCParams, cctxSizeUsingLevel);
goto _output_error;
} } } } }
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "test%3i : thread pool API tests : \n", testNb++)
{
int const threadPoolTestResult = threadPoolTests();
if (threadPoolTestResult) {
goto _output_error;
}
}
DISPLAYLEVEL(3, "thread pool tests OK \n");

#endif /* ZSTD_MULTITHREAD */

_end:
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
return testResult;

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

static int longUnitTests(U32 const seed, double compressibility)
{
size_t const CNBuffSize = 5 MB;
void* const CNBuffer = malloc(CNBuffSize);
size_t const compressedBufferSize = ZSTD_compressBound(CNBuffSize);
void* const compressedBuffer = malloc(compressedBufferSize);
void* const decodedBuffer = malloc(CNBuffSize);
int testResult = 0;
unsigned testNb=0;
size_t cSize;

/* Create compressible noise */
if (!CNBuffer || !compressedBuffer || !decodedBuffer) {
DISPLAY("Not enough memory, aborting\n");
testResult = 1;
goto _end;
}
RDG_genBuffer(CNBuffer, CNBuffSize, compressibility, 0., seed);

/* note : this test is rather long, it would be great to find a way to speed up its execution */
DISPLAYLEVEL(3, "longtest%3i : table cleanliness through index reduction : ", testNb++);
{ int cLevel;
size_t approxIndex = 0;
size_t maxIndex = ((3U << 29) + (1U << ZSTD_WINDOWLOG_MAX)); /* ZSTD_CURRENT_MAX from zstd_compress_internal.h */

/* Provision enough space in a static context so that we can do all
* this without ever reallocating, which would reset the indices. */
size_t const staticCCtxSize = ZSTD_estimateCStreamSize(22);
void* const staticCCtxBuffer = malloc(staticCCtxSize);
ZSTD_CCtx* const cctx = ZSTD_initStaticCCtx(staticCCtxBuffer, staticCCtxSize);

/* bump the indices so the following compressions happen at high
* indices. */
{ ZSTD_outBuffer out = { compressedBuffer, compressedBufferSize, 0 };
ZSTD_inBuffer in = { CNBuffer, CNBuffSize, 0 };
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, -500));
while (approxIndex <= (maxIndex / 4) * 3) {
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
approxIndex += in.pos;
CHECK_Z(in.pos == in.size);
in.pos = 0;
out.pos = 0;
}
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
}

/* spew a bunch of stuff into the table area */
for (cLevel = 1; cLevel <= 22; cLevel++) {
ZSTD_outBuffer out = { compressedBuffer, compressedBufferSize / (unsigned)cLevel, 0 };
ZSTD_inBuffer in = { CNBuffer, CNBuffSize, 0 };
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, cLevel));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
approxIndex += in.pos;
}

/* now crank the indices so we overflow */
{ ZSTD_outBuffer out = { compressedBuffer, compressedBufferSize, 0 };
ZSTD_inBuffer in = { CNBuffer, CNBuffSize, 0 };
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, -500));
while (approxIndex <= maxIndex) {
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
approxIndex += in.pos;
CHECK_Z(in.pos == in.size);
in.pos = 0;
out.pos = 0;
}
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
}

/* do a bunch of compressions again in low indices and ensure we don't
* hit untracked invalid indices */
for (cLevel = 1; cLevel <= 22; cLevel++) {
ZSTD_outBuffer out = { compressedBuffer, compressedBufferSize / (unsigned)cLevel, 0 };
ZSTD_inBuffer in = { CNBuffer, CNBuffSize, 0 };
ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, cLevel));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_flush));
CHECK_Z(ZSTD_compressStream2(cctx, &out, &in, ZSTD_e_end));
approxIndex += in.pos;
}

free(staticCCtxBuffer);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "longtest%3i : testing ldm no regressions in size for opt parser : ", testNb++);
{ size_t cSizeLdm;
size_t cSizeNoLdm;
ZSTD_CCtx* const cctx = ZSTD_createCCtx();

RDG_genBuffer(CNBuffer, CNBuffSize, 0.5, 0.5, seed);

/* Enable checksum to verify round trip. */
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_enable));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19));

/* Round trip once with ldm. */
cSizeLdm = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSizeLdm);
CHECK_Z(ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSizeLdm));

ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters);
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_enableLongDistanceMatching, ZSTD_ps_disable));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 19));

/* Round trip once without ldm. */
cSizeNoLdm = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSizeNoLdm);
CHECK_Z(ZSTD_decompress(decodedBuffer, CNBuffSize, compressedBuffer, cSizeNoLdm));

if (cSizeLdm > cSizeNoLdm) {
DISPLAY("Using long mode should not cause regressions for btopt+\n");
testResult = 1;
goto _end;
}

ZSTD_freeCCtx(cctx);
}
DISPLAYLEVEL(3, "OK \n");

DISPLAYLEVEL(3, "longtest%3i : testing cdict compression with different attachment strategies : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
size_t dictSize = CNBuffSize;
void* dict = (void*)malloc(dictSize);
ZSTD_CCtx_params* cctx_params = ZSTD_createCCtxParams();
ZSTD_dictAttachPref_e const attachPrefs[] = {
ZSTD_dictDefaultAttach,
ZSTD_dictForceAttach,
ZSTD_dictForceCopy,
ZSTD_dictForceLoad,
ZSTD_dictDefaultAttach,
ZSTD_dictForceAttach,
ZSTD_dictForceCopy,
ZSTD_dictForceLoad
};
int const enableDedicatedDictSearch[] = {0, 0, 0, 0, 1, 1, 1, 1};
int cLevel;
int i;

RDG_genBuffer(dict, dictSize, 0.5, 0.5, seed);
RDG_genBuffer(CNBuffer, CNBuffSize, 0.6, 0.6, seed);

CHECK_Z(cctx_params != NULL);

for (dictSize = CNBuffSize; dictSize; dictSize = dictSize >> 3) {
DISPLAYLEVEL(3, "\n Testing with dictSize %u ", (U32)dictSize);
for (cLevel = 4; cLevel < 13; cLevel++) {
for (i = 0; i < 8; ++i) {
ZSTD_dictAttachPref_e const attachPref = attachPrefs[i];
int const enableDDS = enableDedicatedDictSearch[i];
ZSTD_CDict* cdict;

DISPLAYLEVEL(5, "\n dictSize %u cLevel %d iter %d ", (U32)dictSize, cLevel, i);

ZSTD_CCtxParams_init(cctx_params, cLevel);
CHECK_Z(ZSTD_CCtxParams_setParameter(cctx_params, ZSTD_c_enableDedicatedDictSearch, enableDDS));

cdict = ZSTD_createCDict_advanced2(dict, dictSize, ZSTD_dlm_byRef, ZSTD_dct_auto, cctx_params, ZSTD_defaultCMem);
CHECK(cdict != NULL);

CHECK_Z(ZSTD_CCtx_refCDict(cctx, cdict));
CHECK_Z(ZSTD_CCtx_setParameter(cctx, ZSTD_c_forceAttachDict, (int)attachPref));

cSize = ZSTD_compress2(cctx, compressedBuffer, compressedBufferSize, CNBuffer, CNBuffSize);
CHECK_Z(cSize);
CHECK_Z(ZSTD_decompress_usingDict(dctx, decodedBuffer, CNBuffSize, compressedBuffer, cSize, dict, dictSize));

DISPLAYLEVEL(5, "compressed to %u bytes ", (U32)cSize);

CHECK_Z(ZSTD_CCtx_reset(cctx, ZSTD_reset_session_and_parameters));
ZSTD_freeCDict(cdict);
} } }

ZSTD_freeCCtx(cctx);
ZSTD_freeDCtx(dctx);
ZSTD_freeCCtxParams(cctx_params);
free(dict);
}
DISPLAYLEVEL(3, "OK \n");

_end:
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
return testResult;
}

static size_t findDiff(const void* buf1, const void* buf2, size_t max)
{
const BYTE* b1 = (const BYTE*)buf1;
const BYTE* b2 = (const BYTE*)buf2;
size_t u;
for (u=0; u<max; u++) {
if (b1[u] != b2[u]) break;
}
return u;
}

static ZSTD_parameters FUZ_makeParams(ZSTD_compressionParameters cParams, ZSTD_frameParameters fParams)
{
ZSTD_parameters params;
params.cParams = cParams;
params.fParams = fParams;
return params;
}

static size_t FUZ_rLogLength(U32* seed, U32 logLength)
{
size_t const lengthMask = ((size_t)1 << logLength) - 1;
return (lengthMask+1) + (FUZ_rand(seed) & lengthMask);
}

static size_t FUZ_randomLength(U32* seed, U32 maxLog)
{
U32 const logLength = FUZ_rand(seed) % maxLog;
return FUZ_rLogLength(seed, logLength);
}

#undef CHECK
#define CHECK(cond, ...) { \
if (cond) { \
DISPLAY("Error => "); \
DISPLAY(__VA_ARGS__); \
DISPLAY(" (seed %u, test nb %u) \n", (unsigned)seed, testNb); \
goto _output_error; \
} }

#undef CHECK_Z
#define CHECK_Z(f) { \
size_t const err = f; \
if (ZSTD_isError(err)) { \
DISPLAY("Error => %s : %s ", \
#f, ZSTD_getErrorName(err)); \
DISPLAY(" (seed %u, test nb %u) \n", (unsigned)seed, testNb); \
goto _output_error; \
} }

static int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, U32 const maxDurationS, double compressibility, int bigTests)
{
static const U32 maxSrcLog = 23;
static const U32 maxSampleLog = 22;
size_t const srcBufferSize = (size_t)1<<maxSrcLog;
size_t const dstBufferSize = (size_t)1<<maxSampleLog;
size_t const cBufferSize = ZSTD_compressBound(dstBufferSize);
BYTE* cNoiseBuffer[5];
BYTE* const cBuffer = (BYTE*) malloc (cBufferSize);
BYTE* const dstBuffer = (BYTE*) malloc (dstBufferSize);
BYTE* const mirrorBuffer = (BYTE*) malloc (dstBufferSize);
ZSTD_CCtx* const refCtx = ZSTD_createCCtx();
ZSTD_CCtx* const ctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
U32 result = 0;
unsigned testNb = 0;
U32 coreSeed = seed;
UTIL_time_t const startClock = UTIL_getTime();
U64 const maxClockSpan = maxDurationS * SEC_TO_MICRO;
int const cLevelLimiter = bigTests ? 3 : 2;

/* allocation */
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);
CHECK (!cNoiseBuffer[0] || !cNoiseBuffer[1] || !cNoiseBuffer[2] || !cNoiseBuffer[3] || !cNoiseBuffer[4]
|| !dstBuffer || !mirrorBuffer || !cBuffer || !refCtx || !ctx || !dctx,
"Not enough memory, fuzzer tests cancelled");

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

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

/* main test loop */
for ( ; (testNb <= nbTests) || (UTIL_clockSpanMicro(startClock) < maxClockSpan); testNb++ ) {
BYTE* srcBuffer; /* jumping pointer */
U32 lseed;
size_t sampleSize, maxTestSize, totalTestSize;
size_t cSize, totalCSize, totalGenSize;
U64 crcOrig;
BYTE* sampleBuffer;
const BYTE* dict;
size_t dictSize;

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

FUZ_rand(&coreSeed);
{ U32 const prime1 = 2654435761U; lseed = coreSeed ^ prime1; }

/* srcBuffer selection [0-4] */
{ U32 buffNb = FUZ_rand(&lseed) & 0x7F;
if (buffNb & 7) buffNb=2; /* most common : compressible (P) */
else {
buffNb >>= 3;
if (buffNb & 7) {
const U32 tnb[2] = { 1, 3 }; /* barely/highly compressible */
buffNb = tnb[buffNb >> 3];
} else {
const U32 tnb[2] = { 0, 4 }; /* not compressible / sparse */
buffNb = tnb[buffNb >> 3];
} }
srcBuffer = cNoiseBuffer[buffNb];
}

/* select src segment */
sampleSize = FUZ_randomLength(&lseed, maxSampleLog);

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

/* compression tests */
{ int const cLevelPositive = (int)
( FUZ_rand(&lseed) %
((U32)ZSTD_maxCLevel() - (FUZ_highbit32((U32)sampleSize) / (U32)cLevelLimiter)) )
+ 1;
int const cLevel = ((FUZ_rand(&lseed) & 15) == 3) ?
- (int)((FUZ_rand(&lseed) & 7) + 1) : /* test negative cLevel */
cLevelPositive;
DISPLAYLEVEL(5, "fuzzer t%u: Simple compression test (level %i) \n", testNb, cLevel);
cSize = ZSTD_compressCCtx(ctx, cBuffer, cBufferSize, sampleBuffer, sampleSize, cLevel);
CHECK(ZSTD_isError(cSize), "ZSTD_compressCCtx failed : %s", ZSTD_getErrorName(cSize));

/* compression failure test : too small dest buffer */
assert(cSize > 3);
{ const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1;
const size_t tooSmallSize = cSize - missing;
const unsigned endMark = 0x4DC2B1A9;
memcpy(dstBuffer+tooSmallSize, &endMark, sizeof(endMark));
DISPLAYLEVEL(5, "fuzzer t%u: compress into too small buffer of size %u (missing %u bytes) \n",
testNb, (unsigned)tooSmallSize, (unsigned)missing);
{ size_t const errorCode = ZSTD_compressCCtx(ctx, dstBuffer, tooSmallSize, sampleBuffer, sampleSize, cLevel);
CHECK(ZSTD_getErrorCode(errorCode) != ZSTD_error_dstSize_tooSmall, "ZSTD_compressCCtx should have failed ! (buffer too small : %u < %u)", (unsigned)tooSmallSize, (unsigned)cSize); }
{ unsigned endCheck; memcpy(&endCheck, dstBuffer+tooSmallSize, sizeof(endCheck));
CHECK(endCheck != endMark, "ZSTD_compressCCtx : dst buffer overflow (check.%08X != %08X.mark)", endCheck, endMark); }
} }

/* frame header decompression test */
{ ZSTD_frameHeader zfh;
CHECK_Z( ZSTD_getFrameHeader(&zfh, cBuffer, cSize) );
CHECK(zfh.frameContentSize != sampleSize, "Frame content size incorrect");
}

/* Decompressed size test */
{ unsigned long long const rSize = ZSTD_findDecompressedSize(cBuffer, cSize);
CHECK(rSize != sampleSize, "decompressed size incorrect");
}

/* successful decompression test */
DISPLAYLEVEL(5, "fuzzer t%u: simple decompression test \n", testNb);
{ size_t const margin = (FUZ_rand(&lseed) & 1) ? 0 : (FUZ_rand(&lseed) & 31) + 1;
size_t const dSize = ZSTD_decompress(dstBuffer, sampleSize + margin, cBuffer, cSize);
CHECK(dSize != sampleSize, "ZSTD_decompress failed (%s) (srcSize : %u ; cSize : %u)", ZSTD_getErrorName(dSize), (unsigned)sampleSize, (unsigned)cSize);
{ U64 const crcDest = XXH64(dstBuffer, sampleSize, 0);
CHECK(crcOrig != crcDest, "decompression result corrupted (pos %u / %u)", (unsigned)findDiff(sampleBuffer, dstBuffer, sampleSize), (unsigned)sampleSize);
} }

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

/* truncated src decompression test */
DISPLAYLEVEL(5, "fuzzer t%u: decompression of truncated source \n", testNb);
{ size_t const missing = (FUZ_rand(&lseed) % (cSize-2)) + 1; /* no problem, as cSize > 4 (frameHeaderSizer) */
size_t const tooSmallSize = cSize - missing;
void* cBufferTooSmall = malloc(tooSmallSize); /* valgrind will catch read overflows */
CHECK(cBufferTooSmall == NULL, "not enough memory !");
memcpy(cBufferTooSmall, cBuffer, tooSmallSize);
{ size_t const errorCode = ZSTD_decompress(dstBuffer, dstBufferSize, cBufferTooSmall, tooSmallSize);
CHECK(!ZSTD_isError(errorCode), "ZSTD_decompress should have failed ! (truncated src buffer)"); }
free(cBufferTooSmall);
}

/* too small dst decompression test */
DISPLAYLEVEL(5, "fuzzer t%u: decompress into too small dst buffer \n", testNb);
if (sampleSize > 3) {
size_t const missing = (FUZ_rand(&lseed) % (sampleSize-2)) + 1; /* no problem, as cSize > 4 (frameHeaderSizer) */
size_t const tooSmallSize = sampleSize - missing;
static const BYTE token = 0xA9;
dstBuffer[tooSmallSize] = token;
{ size_t const errorCode = ZSTD_decompress(dstBuffer, tooSmallSize, cBuffer, cSize);
CHECK(ZSTD_getErrorCode(errorCode) != ZSTD_error_dstSize_tooSmall, "ZSTD_decompress should have failed : %u > %u (dst buffer too small)", (unsigned)errorCode, (unsigned)tooSmallSize); }
CHECK(dstBuffer[tooSmallSize] != token, "ZSTD_decompress : dst buffer overflow");
}

/* noisy src decompression test */
if (cSize > 6) {
/* insert noise into src */
{ U32 const maxNbBits = FUZ_highbit32((U32)(cSize-4));
size_t pos = 4; /* preserve magic number (too easy to detect) */
for (;;) {
/* keep some original src */
{ U32 const nbBits = FUZ_rand(&lseed) % maxNbBits;
size_t const mask = (1<<nbBits) - 1;
size_t const skipLength = FUZ_rand(&lseed) & mask;
pos += skipLength;
}
if (pos >= cSize) break;
/* add noise */
{ U32 const nbBitsCodes = FUZ_rand(&lseed) % maxNbBits;
U32 const nbBits = nbBitsCodes ? nbBitsCodes-1 : 0;
size_t const mask = (1<<nbBits) - 1;
size_t const rNoiseLength = (FUZ_rand(&lseed) & mask) + 1;
size_t const noiseLength = MIN(rNoiseLength, cSize-pos);
size_t const noiseStart = FUZ_rand(&lseed) % (srcBufferSize - noiseLength);
memcpy(cBuffer + pos, srcBuffer + noiseStart, noiseLength);
pos += noiseLength;
} } }

/* decompress noisy source */
DISPLAYLEVEL(5, "fuzzer t%u: decompress noisy source \n", testNb);
{ U32 const endMark = 0xA9B1C3D6;
memcpy(dstBuffer+sampleSize, &endMark, 4);
{ size_t const decompressResult = ZSTD_decompress(dstBuffer, sampleSize, cBuffer, cSize);
/* result *may* be an unlikely success, but even then, it must strictly respect dst buffer boundaries */
CHECK((!ZSTD_isError(decompressResult)) && (decompressResult>sampleSize),
"ZSTD_decompress on noisy src : result is too large : %u > %u (dst buffer)", (unsigned)decompressResult, (unsigned)sampleSize);
}
{ U32 endCheck; memcpy(&endCheck, dstBuffer+sampleSize, 4);
CHECK(endMark!=endCheck, "ZSTD_decompress on noisy src : dst buffer overflow");
} } } /* noisy src decompression test */

/*===== Bufferless streaming compression test, scattered segments and dictionary =====*/
DISPLAYLEVEL(5, "fuzzer t%u: Bufferless streaming compression test \n", testNb);
{ U32 const testLog = FUZ_rand(&lseed) % maxSrcLog;
U32 const dictLog = FUZ_rand(&lseed) % maxSrcLog;
int const cLevel = (int)(FUZ_rand(&lseed) %
((U32)ZSTD_maxCLevel() -
(MAX(testLog, dictLog) / (U32)cLevelLimiter))) +
1;
maxTestSize = FUZ_rLogLength(&lseed, testLog);
if (maxTestSize >= dstBufferSize) maxTestSize = dstBufferSize-1;

dictSize = FUZ_rLogLength(&lseed, dictLog); /* needed also for decompression */
dict = srcBuffer + (FUZ_rand(&lseed) % (srcBufferSize - dictSize));

DISPLAYLEVEL(6, "fuzzer t%u: Compressing up to <=%u bytes at level %i with dictionary size %u \n",
testNb, (unsigned)maxTestSize, cLevel, (unsigned)dictSize);

if (FUZ_rand(&lseed) & 0xF) {
CHECK_Z ( ZSTD_compressBegin_usingDict(refCtx, dict, dictSize, cLevel) );
} else {
ZSTD_compressionParameters const cPar = ZSTD_getCParams(cLevel, ZSTD_CONTENTSIZE_UNKNOWN, dictSize);
ZSTD_frameParameters const fPar = { FUZ_rand(&lseed)&1 /* contentSizeFlag */,
!(FUZ_rand(&lseed)&3) /* contentChecksumFlag*/,
0 /*NodictID*/ }; /* note : since dictionary is fake, dictIDflag has no impact */
ZSTD_parameters const p = FUZ_makeParams(cPar, fPar);
CHECK_Z ( ZSTD_compressBegin_advanced(refCtx, dict, dictSize, p, 0) );
}
CHECK_Z( ZSTD_copyCCtx(ctx, refCtx, 0) );
}

{ U32 const nbChunks = (FUZ_rand(&lseed) & 127) + 2;
U32 n;
XXH64_state_t xxhState;
XXH64_reset(&xxhState, 0);
for (totalTestSize=0, cSize=0, n=0 ; n<nbChunks ; n++) {
size_t const segmentSize = FUZ_randomLength(&lseed, maxSampleLog);
size_t const segmentStart = FUZ_rand(&lseed) % (srcBufferSize - segmentSize);

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

{ size_t const compressResult = ZSTD_compressContinue(ctx, cBuffer+cSize, cBufferSize-cSize, srcBuffer+segmentStart, segmentSize);
CHECK (ZSTD_isError(compressResult), "multi-segments compression error : %s", ZSTD_getErrorName(compressResult));
cSize += compressResult;
}
XXH64_update(&xxhState, srcBuffer+segmentStart, segmentSize);
memcpy(mirrorBuffer + totalTestSize, srcBuffer+segmentStart, segmentSize);
totalTestSize += segmentSize;
}

{ size_t const flushResult = ZSTD_compressEnd(ctx, cBuffer+cSize, cBufferSize-cSize, NULL, 0);
CHECK (ZSTD_isError(flushResult), "multi-segments epilogue error : %s", ZSTD_getErrorName(flushResult));
cSize += flushResult;
}
crcOrig = XXH64_digest(&xxhState);
}

/* streaming decompression test */
DISPLAYLEVEL(5, "fuzzer t%u: Bufferless streaming decompression test \n", testNb);
/* ensure memory requirement is good enough (should always be true) */
{ ZSTD_frameHeader zfh;
CHECK( ZSTD_getFrameHeader(&zfh, cBuffer, ZSTD_FRAMEHEADERSIZE_MAX),
"ZSTD_getFrameHeader(): error retrieving frame information");
{ size_t const roundBuffSize = ZSTD_decodingBufferSize_min(zfh.windowSize, zfh.frameContentSize);
CHECK_Z(roundBuffSize);
CHECK((roundBuffSize > totalTestSize) && (zfh.frameContentSize!=ZSTD_CONTENTSIZE_UNKNOWN),
"ZSTD_decodingBufferSize_min() requires more memory (%u) than necessary (%u)",
(unsigned)roundBuffSize, (unsigned)totalTestSize );
} }
if (dictSize<8) dictSize=0, dict=NULL; /* disable dictionary */
CHECK_Z( ZSTD_decompressBegin_usingDict(dctx, dict, dictSize) );
totalCSize = 0;
totalGenSize = 0;
while (totalCSize < cSize) {
size_t const inSize = ZSTD_nextSrcSizeToDecompress(dctx);
size_t const genSize = ZSTD_decompressContinue(dctx, dstBuffer+totalGenSize, dstBufferSize-totalGenSize, cBuffer+totalCSize, inSize);
CHECK (ZSTD_isError(genSize), "ZSTD_decompressContinue error : %s", ZSTD_getErrorName(genSize));
totalGenSize += genSize;
totalCSize += inSize;
}
CHECK (ZSTD_nextSrcSizeToDecompress(dctx) != 0, "frame not fully decoded");
CHECK (totalGenSize != totalTestSize, "streaming decompressed data : wrong size")
CHECK (totalCSize != cSize, "compressed data should be fully read")
{ U64 const crcDest = XXH64(dstBuffer, totalTestSize, 0);
CHECK(crcOrig != crcDest, "streaming decompressed data corrupted (pos %u / %u)",
(unsigned)findDiff(mirrorBuffer, dstBuffer, totalTestSize), (unsigned)totalTestSize);
}
} /* for ( ; (testNb <= nbTests) */
DISPLAY("\r%u fuzzer tests completed \n", testNb-1);

_cleanup:
ZSTD_freeCCtx(refCtx);
ZSTD_freeCCtx(ctx);
ZSTD_freeDCtx(dctx);
free(cNoiseBuffer[0]);
free(cNoiseBuffer[1]);
free(cNoiseBuffer[2]);
free(cNoiseBuffer[3]);
free(cNoiseBuffer[4]);
free(cBuffer);
free(dstBuffer);
free(mirrorBuffer);
return (int)result;

_output_error:
result = 1;
goto _cleanup;
}

/*_*******************************************************
* Command line
*********************************************************/
static int FUZ_usage(const char* programName)
{
DISPLAY( "Usage :\n");
DISPLAY( " %s [args]\n", programName);
DISPLAY( "\n");
DISPLAY( "Arguments :\n");
DISPLAY( " -i# : Number of tests (default:%i)\n", nbTestsDefault);
DISPLAY( " -T# : Max duration to run for. Overrides number of tests. (e.g. -T1m or -T60s for one minute)\n");
DISPLAY( " -s# : Select seed (default:prompt user)\n");
DISPLAY( " -t# : Select starting test number (default:0)\n");
DISPLAY( " -P# : Select compressibility in %% (default:%i%%)\n", FUZ_compressibility_default);
DISPLAY( " -v : verbose\n");
DISPLAY( " -p : pause at the end\n");
DISPLAY( " -h : display help and exit\n");
return 0;
}

/*! readU32FromChar() :
@return : unsigned integer value read from input in `char` format
allows and interprets K, KB, KiB, M, MB and MiB suffix.
Will also modify `*stringPtr`, advancing it to position where it stopped reading.
Note : function result can overflow if digit string > MAX_UINT */
static unsigned readU32FromChar(const char** stringPtr)
{
unsigned result = 0;
while ((**stringPtr >='0') && (**stringPtr <='9'))
result *= 10, result += (unsigned)(**stringPtr - '0'), (*stringPtr)++ ;
if ((**stringPtr=='K') || (**stringPtr=='M')) {
result <<= 10;
if (**stringPtr=='M') result <<= 10;
(*stringPtr)++ ;
if (**stringPtr=='i') (*stringPtr)++;
if (**stringPtr=='B') (*stringPtr)++;
}
return result;
}

/** longCommandWArg() :
* check if *stringPtr is the same as longCommand.
* If yes, @return 1 and advances *stringPtr to the position which immediately follows longCommand.
* @return 0 and doesn't modify *stringPtr otherwise.
*/
static int longCommandWArg(const char** stringPtr, const char* longCommand)
{
size_t const comSize = strlen(longCommand);
int const result = !strncmp(*stringPtr, longCommand, comSize);
if (result) *stringPtr += comSize;
return result;
}

int main(int argc, const char** argv)
{
U32 seed = 0;
int seedset = 0;
int argNb;
int nbTests = nbTestsDefault;
int testNb = 0;
int proba = FUZ_compressibility_default;
double probfloat;
int result = 0;
U32 mainPause = 0;
U32 maxDuration = 0;
int bigTests = 1;
int longTests = 0;
U32 memTestsOnly = 0;
const char* const programName = argv[0];

/* Check command line */
for (argNb=1; argNb<argc; argNb++) {
const char* argument = argv[argNb];
if(!argument) continue; /* Protection if argument empty */

/* Handle commands. Aggregated commands are allowed */
if (argument[0]=='-') {

if (longCommandWArg(&argument, "--memtest=")) { memTestsOnly = readU32FromChar(&argument); continue; }

if (!strcmp(argument, "--memtest")) { memTestsOnly=1; continue; }
if (!strcmp(argument, "--no-big-tests")) { bigTests=0; continue; }
if (!strcmp(argument, "--long-tests")) { longTests=1; continue; }
if (!strcmp(argument, "--no-long-tests")) { longTests=0; continue; }

argument++;
while (*argument!=0) {
switch(*argument)
{
case 'h':
return FUZ_usage(programName);

case 'v':
argument++;
g_displayLevel++;
break;

case 'q':
argument++;
g_displayLevel--;
break;

case 'p': /* pause at the end */
argument++;
mainPause = 1;
break;

case 'i':
argument++; maxDuration = 0;
nbTests = (int)readU32FromChar(&argument);
break;

case 'T':
argument++;
nbTests = 0;
maxDuration = readU32FromChar(&argument);
if (*argument=='s') argument++; /* seconds */
if (*argument=='m') maxDuration *= 60, argument++; /* minutes */
if (*argument=='n') argument++;
break;

case 's':
argument++;
seedset = 1;
seed = readU32FromChar(&argument);
break;

case 't':
argument++;
testNb = (int)readU32FromChar(&argument);
break;

case 'P': /* compressibility % */
argument++;
proba = (int)readU32FromChar(&argument);
if (proba>100) proba = 100;
break;

default:
return (FUZ_usage(programName), 1);
} } } } /* for (argNb=1; argNb<argc; argNb++) */

/* Get Seed */
DISPLAY("Starting zstd tester (%i-bits, %s)\n", (int)(sizeof(size_t)*8), ZSTD_VERSION_STRING);

if (!seedset) {
time_t const t = time(NULL);
U32 const h = XXH32(&t, sizeof(t), 1);
seed = h % 10000;
}

DISPLAY("Seed = %u\n", (unsigned)seed);
if (proba!=FUZ_compressibility_default) DISPLAY("Compressibility : %i%%\n", proba);

probfloat = ((double)proba) / 100;

if (memTestsOnly) {
g_displayLevel = MAX(3, g_displayLevel);
return FUZ_mallocTests(seed, probfloat, memTestsOnly);
}

if (nbTests < testNb) nbTests = testNb;

if (testNb==0) {
result = basicUnitTests(0, probfloat); /* constant seed for predictability */

if (!result && longTests) {
result = longUnitTests(0, probfloat);
}
}
if (!result)
result = fuzzerTests(seed, (unsigned)nbTests, (unsigned)testNb, maxDuration, ((double)proba) / 100, bigTests);
if (mainPause) {
int unused;
DISPLAY("Press Enter \n");
unused = getchar();
(void)unused;
}
return result;
}