AuroraMiddleware/lz4
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

fuzzer : faster jump to testNb

Browse Source
This commit is contained in:
Yann Collet 2014-10-19 13:47:22 +01:00
parent 68ea218a72
commit 6b89dca1a9
1 changed files with 22 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
programs/fuzzer.c
View File

@ -100,7 +100,6 @@ static U32 g_time = 0;
Unit Variables
*****************************************/
static char* programName = NULL;
static int g_pause = 0;
/*********************************************************
@ -126,8 +125,12 @@ static U32 FUZ_GetMilliSpan(U32 nTimeStart)
}
# define FUZ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
unsigned int FUZ_rand(unsigned int* src)
static U32 FUZ_rotl32(U32 u32, U32 nbBits)
{
return ((u32 << nbBits) | (u32 >> (32 - nbBits)));
}
static U32 FUZ_rand(U32* src)
{
U32 rand32 = *src;
rand32 *= PRIME1;
@ -140,7 +143,7 @@ unsigned int FUZ_rand(unsigned int* src)
#define FUZ_RAND15BITS ((FUZ_rand(seed) >> 3) & 32767)
#define FUZ_RANDLENGTH ( ((FUZ_rand(seed) >> 7) & 3) ? (FUZ_rand(seed) % 15) : (FUZ_rand(seed) % 510) + 15)
void FUZ_fillCompressibleNoiseBuffer(void* buffer, int bufferSize, double proba, U32* seed)
static void FUZ_fillCompressibleNoiseBuffer(void* buffer, int bufferSize, double proba, U32* seed)
{
BYTE* BBuffer = (BYTE*)buffer;
int pos = 0;
@ -318,18 +321,23 @@ static int FUZ_test(U32 seed, int nbCycles, int startCycle, double compressibili
char* dict;
char* block;
FUZ_displayUpdate(cycleNb);
blockSize = FUZ_rand(&randState) % FUZ_MAX_BLOCK_SIZE;
blockStart = FUZ_rand(&randState) % (COMPRESSIBLE_NOISE_LENGTH - blockSize);
dictSize = FUZ_rand(&randState) % FUZ_MAX_DICT_SIZE;
if (dictSize > blockStart) dictSize = blockStart;
block = ((char*)CNBuffer) + blockStart;
dict = block - dictSize;
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_compress_continue(&LZ4dict, block, compressedBuffer, blockSize);
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_compress_continue(&LZ4dict, block, compressedBuffer, blockSize);
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_compress_continue(&LZ4dict, block, compressedBuffer, blockSize);
if (0) // some problems related to dictionary re-use; in this case, enable this loop
{
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_compress_continue(&LZ4dict, block, compressedBuffer, blockSize);
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_compress_continue(&LZ4dict, block, compressedBuffer, blockSize);
LZ4_loadDict(&LZ4dict, dict, dictSize);
LZ4_compress_continue(&LZ4dict, block, compressedBuffer, blockSize);
}
}
// Test loop
@ -742,6 +750,7 @@ int main(int argc, char** argv)
int nbTests = NB_ATTEMPTS;
int testNb = 0;
int proba = FUZ_COMPRESSIBILITY_DEFAULT;
int pause = 0;
// Check command line
programName = argv[0];
@ -754,7 +763,7 @@ int main(int argc, char** argv)
// Decode command (note : aggregated commands are allowed)
if (argument[0]=='-')
{
if (!strcmp(argument, "--no-prompt")) { g_pause=0; seedset=1; g_displayLevel=1; continue; }
if (!strcmp(argument, "--no-prompt")) { pause=0; seedset=1; g_displayLevel=1; continue; }
argument++;
while (*argument!=0)
@ -771,7 +780,7 @@ int main(int argc, char** argv)
case 'p': /* pause at the end */
argument++;
g_pause=1;
pause=1;
break;
case 'i':
@ -838,7 +847,7 @@ int main(int argc, char** argv)
{
int result = FUZ_test(seed, nbTests, testNb, ((double)proba) / 100);
if (g_pause)
if (pause)
{
DISPLAY("press enter ... \n");
getchar();