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42cb61367a
lz4/programs/fuzzer.c
Yann Collet 42cb61367a fuzzer : added compressibility parameter (-p#)
2014-04-29 23:44:49 +01:00

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/*
fuzzer.c - Fuzzer test tool for LZ4
Copyright (C) Yann Collet 2012-2014
GPL v2 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
You can contact the author at :
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
- LZ4 source repository : http://code.google.com/p/lz4/
*/
/**************************************
Remove Visual warning messages
**************************************/
#define _CRT_SECURE_NO_WARNINGS // fgets
/**************************************
Includes
**************************************/
#include <stdlib.h>
#include <stdio.h> // fgets, sscanf
#include <sys/timeb.h> // timeb
#include <string.h> // strcmp
#include "lz4.h"
#include "lz4hc.h"
#include "xxhash.h"
/**************************************
Basic Types
**************************************/
#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */
# include <stdint.h>
typedef uint8_t BYTE;
typedef uint16_t U16;
typedef uint32_t U32;
typedef int32_t S32;
typedef uint64_t U64;
#else
typedef unsigned char BYTE;
typedef unsigned short U16;
typedef unsigned int U32;
typedef signed int S32;
typedef unsigned long long U64;
#endif
/**************************************
Constants
**************************************/
#ifndef LZ4_VERSION
# define LZ4_VERSION "rc118"
#endif
#define NB_ATTEMPTS (1<<16)
#define COMPRESSIBLE_NOISE_LENGTH (1 << 21)
#define FUZ_MAX_BLOCK_SIZE (1 << 17)
#define FUZ_MAX_DICT_SIZE (1 << 15)
#define FUZ_COMPRESSIBILITY_DEFAULT 50
#define PRIME1 2654435761U
#define PRIME2 2246822519U
#define PRIME3 3266489917U
//**************************************
// Macros
//**************************************
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
//**************************************
// Local Parameters
//**************************************
static int no_prompt = 0;
static char* programName;
/*********************************************************
Fuzzer functions
*********************************************************/
static int FUZ_GetMilliStart()
{
struct timeb tb;
int nCount;
ftime( &tb );
nCount = (int) (tb.millitm + (tb.time & 0xfffff) * 1000);
return nCount;
}
static int FUZ_GetMilliSpan( int nTimeStart )
{
int nSpan = FUZ_GetMilliStart() - nTimeStart;
if ( nSpan < 0 )
nSpan += 0x100000 * 1000;
return nSpan;
}
# define FUZ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
unsigned int FUZ_rand(unsigned int* src)
{
U32 rand32 = *src;
rand32 *= PRIME1;
rand32 += PRIME2;
rand32 = FUZ_rotl32(rand32, 13);
*src = rand32;
return rand32;
}
#define FUZ_RAND15BITS ((FUZ_rand(seed) >> 3) & 32767)
#define FUZ_RANDLENGTH ( ((FUZ_rand(seed) >> 7) & 3) ? (FUZ_rand(seed) % 14) : (FUZ_rand(seed) & 511) + 15)
void FUZ_fillCompressibleNoiseBuffer(void* buffer, int bufferSize, double proba, U32* seed)
{
BYTE* BBuffer = (BYTE*)buffer;
int pos = 0;
U32 P32 = (U32)(32768 * proba);
// First Byte
BBuffer[pos++] = (BYTE)(FUZ_rand(seed));
while (pos < bufferSize)
{
// Select : Literal (noise) or copy (within 64K)
if (FUZ_RAND15BITS < P32)
{
// Copy (within 64K)
int ref, d;
int length = FUZ_RANDLENGTH + 4;
int offset = FUZ_RAND15BITS + 1;
if (offset > pos) offset = pos;
if (pos + length > bufferSize) length = bufferSize - pos;
ref = pos - offset;
d = pos + length;
while (pos < d) BBuffer[pos++] = BBuffer[ref++];
}
else
{
// Literal (noise)
int d;
int length = FUZ_RANDLENGTH;
if (pos + length > bufferSize) length = bufferSize - pos;
d = pos + length;
while (pos < d) BBuffer[pos++] = (BYTE)(FUZ_rand(seed) >> 5);
}
}
}
int FUZ_SecurityTest()
{
char* output;
char* input;
int i, r;
printf("Overflow test (issue 52)...\n");
input = (char*) malloc (20<<20);
output = (char*) malloc (20<<20);
input[0] = 0x0F;
input[1] = 0x00;
input[2] = 0x00;
for(i = 3; i < 16840000; i++)
input[i] = 0xff;
r = LZ4_decompress_fast(input, output, 20<<20);
free(input);
free(output);
printf(" Passed (return = %i < 0)\n",r);
return 0;
}
#define FUZ_MAX(a,b) (a>b?a:b)
int FUZ_test(U32 seed, int nbTests, double compressibility) {
unsigned long long bytes = 0;
unsigned long long cbytes = 0;
unsigned long long hcbytes = 0;
unsigned long long ccbytes = 0;
void* CNBuffer;
char* compressedBuffer;
char* decodedBuffer;
# define FUZ_max LZ4_COMPRESSBOUND(LEN)
unsigned int randState=seed;
int ret, attemptNb;
# define FUZ_CHECKTEST(cond, ...) if (cond) { printf("Test %i : ", testNb); printf(__VA_ARGS__); \
printf(" (seed %u, cycle %i) \n", seed, attemptNb); goto _output_error; }
# define FUZ_DISPLAYTEST testNb++; no_prompt ? 0 : printf("%2i\b\b", testNb);
void* stateLZ4 = malloc(LZ4_sizeofState());
void* stateLZ4HC = malloc(LZ4_sizeofStateHC());
void* LZ4continue;
U32 crcOrig, crcCheck;
// Create compressible test buffer
CNBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
FUZ_fillCompressibleNoiseBuffer(CNBuffer, COMPRESSIBLE_NOISE_LENGTH, compressibility, &randState);
compressedBuffer = malloc(LZ4_compressBound(FUZ_MAX_BLOCK_SIZE));
decodedBuffer = malloc(FUZ_MAX_DICT_SIZE + FUZ_MAX_BLOCK_SIZE);
// Test loop
for (attemptNb = 0; attemptNb < nbTests; attemptNb++)
{
int testNb = 0;
char* dict;
char* block;
int dictSize, blockSize, blockStart, compressedSize, HCcompressedSize;
int blockContinueCompressedSize;
// note : promptThrottle is throtting stdout to prevent
// Travis-CI's output limit (10MB) and false hangup detection.
const int step = FUZ_MAX(1, nbTests / 100);
const int promptThrottle = ((attemptNb % step) == 0);
if (!no_prompt || attemptNb == 0 || promptThrottle)
{
printf("\r%7i /%7i - ", attemptNb, nbTests);
if (no_prompt) fflush(stdout);
}
// Select block to test
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;
/* Compression tests */
// Test compression HC
FUZ_DISPLAYTEST;
ret = LZ4_compressHC(block, compressedBuffer, blockSize);
FUZ_CHECKTEST(ret==0, "LZ4_compressHC() failed");
HCcompressedSize = ret;
// Test compression HC using external state
FUZ_DISPLAYTEST;
ret = LZ4_compressHC_withStateHC(stateLZ4HC, block, compressedBuffer, blockSize);
FUZ_CHECKTEST(ret==0, "LZ4_compressHC_withStateHC() failed");
// Test compression using external state
FUZ_DISPLAYTEST;
ret = LZ4_compress_withState(stateLZ4, block, compressedBuffer, blockSize);
FUZ_CHECKTEST(ret==0, "LZ4_compress_withState() failed");
// Test compression
FUZ_DISPLAYTEST;
ret = LZ4_compress(block, compressedBuffer, blockSize);
FUZ_CHECKTEST(ret==0, "LZ4_compress() failed");
compressedSize = ret;
/* Decompression tests */
crcOrig = XXH32(block, blockSize, 0);
// Test decoding with output size being exactly what's necessary => must work
FUZ_DISPLAYTEST;
ret = LZ4_decompress_fast(compressedBuffer, decodedBuffer, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_fast failed despite correct space");
FUZ_CHECKTEST(ret!=compressedSize, "LZ4_decompress_fast failed : did not fully read compressed data");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast corrupted decoded data");
// Test decoding with one byte missing => must fail
FUZ_DISPLAYTEST;
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_fast(compressedBuffer, decodedBuffer, blockSize-1);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast should have failed, due to Output Size being too small");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_fast overrun specified output buffer");
// Test decoding with one byte too much => must fail
FUZ_DISPLAYTEST;
ret = LZ4_decompress_fast(compressedBuffer, decodedBuffer, blockSize+1);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast should have failed, due to Output Size being too large");
// Test decoding with output size exactly what's necessary => must work
FUZ_DISPLAYTEST;
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe failed despite sufficient space");
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe corrupted decoded data");
// Test decoding with more than enough output size => must work
FUZ_DISPLAYTEST;
decodedBuffer[blockSize] = 0;
decodedBuffer[blockSize+1] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize+1);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe failed despite amply sufficient space");
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe did not regenerate original data");
//FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe wrote more than target size"); // well, is that an issue ?
FUZ_CHECKTEST(decodedBuffer[blockSize+1], "LZ4_decompress_safe overrun specified output buffer size");
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe corrupted decoded data");
// Test decoding with output size being one byte too short => must fail
FUZ_DISPLAYTEST;
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize-1);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to Output Size being one byte too short");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_safe overrun specified output buffer size");
// Test decoding with output size being 10 bytes too short => must fail
FUZ_DISPLAYTEST;
if (blockSize>10)
{
decodedBuffer[blockSize-10] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize, blockSize-10);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to Output Size being 10 bytes too short");
FUZ_CHECKTEST(decodedBuffer[blockSize-10], "LZ4_decompress_safe overrun specified output buffer size");
}
// Test decoding with input size being one byte too short => must fail
FUZ_DISPLAYTEST;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize-1, blockSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to input size being one byte too short (blockSize=%i, ret=%i, compressedSize=%i)", blockSize, ret, compressedSize);
// Test decoding with input size being one byte too large => must fail
FUZ_DISPLAYTEST;
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe(compressedBuffer, decodedBuffer, compressedSize+1, blockSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe should have failed, due to input size being too large");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe overrun specified output buffer size");
// Test partial decoding with target output size being max/2 => must work
FUZ_DISPLAYTEST;
ret = LZ4_decompress_safe_partial(compressedBuffer, decodedBuffer, compressedSize, blockSize/2, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe_partial failed despite sufficient space");
// Test partial decoding with target output size being just below max => must work
FUZ_DISPLAYTEST;
ret = LZ4_decompress_safe_partial(compressedBuffer, decodedBuffer, compressedSize, blockSize-3, blockSize);
FUZ_CHECKTEST(ret<0, "LZ4_decompress_safe_partial failed despite sufficient space");
/* Test Compression with limited output size */
// Test compression with output size being exactly what's necessary (should work)
FUZ_DISPLAYTEST;
ret = LZ4_compress_limitedOutput(block, compressedBuffer, blockSize, compressedSize);
FUZ_CHECKTEST(ret==0, "LZ4_compress_limitedOutput() failed despite sufficient space");
// Test compression with output size being exactly what's necessary and external state (should work)
FUZ_DISPLAYTEST;
ret = LZ4_compress_limitedOutput_withState(stateLZ4, block, compressedBuffer, blockSize, compressedSize);
FUZ_CHECKTEST(ret==0, "LZ4_compress_limitedOutput_withState() failed despite sufficient space");
// Test HC compression with output size being exactly what's necessary (should work)
FUZ_DISPLAYTEST;
ret = LZ4_compressHC_limitedOutput(block, compressedBuffer, blockSize, HCcompressedSize);
FUZ_CHECKTEST(ret==0, "LZ4_compressHC_limitedOutput() failed despite sufficient space");
// Test HC compression with output size being exactly what's necessary (should work)
FUZ_DISPLAYTEST;
ret = LZ4_compressHC_limitedOutput_withStateHC(stateLZ4HC, block, compressedBuffer, blockSize, HCcompressedSize);
FUZ_CHECKTEST(ret==0, "LZ4_compressHC_limitedOutput_withStateHC() failed despite sufficient space");
// Test compression with just one missing byte into output buffer => must fail
FUZ_DISPLAYTEST;
compressedBuffer[compressedSize-1] = 0;
ret = LZ4_compress_limitedOutput(block, compressedBuffer, blockSize, compressedSize-1);
FUZ_CHECKTEST(ret, "LZ4_compress_limitedOutput should have failed (output buffer too small by 1 byte)");
FUZ_CHECKTEST(compressedBuffer[compressedSize-1], "LZ4_compress_limitedOutput overran output buffer")
// Test HC compression with just one missing byte into output buffer => must fail
FUZ_DISPLAYTEST;
compressedBuffer[compressedSize-1] = 0;
ret = LZ4_compressHC_limitedOutput(block, compressedBuffer, blockSize, HCcompressedSize-1);
FUZ_CHECKTEST(ret, "LZ4_compressHC_limitedOutput should have failed (output buffer too small by 1 byte)");
FUZ_CHECKTEST(compressedBuffer[compressedSize-1], "LZ4_compressHC_limitedOutput overran output buffer")
/* Dictionary tests */
// Compress using dictionary
FUZ_DISPLAYTEST;
LZ4continue = LZ4_create (dict);
LZ4_compress_continue (LZ4continue, dict, compressedBuffer, dictSize); // Just to fill hash tables
blockContinueCompressedSize = LZ4_compress_continue (LZ4continue, block, compressedBuffer, blockSize);
FUZ_CHECKTEST(blockContinueCompressedSize==0, "LZ4_compress_continue failed");
LZ4_free (LZ4continue);
// Decompress with dictionary as prefix
FUZ_DISPLAYTEST;
memcpy(decodedBuffer, dict, dictSize);
ret = LZ4_decompress_fast_withPrefix64k(compressedBuffer, decodedBuffer+dictSize, blockSize);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_decompress_fast_withPrefix64k did not read all compressed block input");
crcCheck = XXH32(decodedBuffer+dictSize, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_withPrefix64k corrupted decoded data");
FUZ_DISPLAYTEST;
ret = LZ4_decompress_safe_withPrefix64k(compressedBuffer, decodedBuffer+dictSize, blockContinueCompressedSize, blockSize);
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_withPrefix64k did not regenerate original data");
crcCheck = XXH32(decodedBuffer+dictSize, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_withPrefix64k corrupted decoded data");
// Decompress with dictionary as external
FUZ_DISPLAYTEST;
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_fast_withDict(compressedBuffer, decodedBuffer, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockContinueCompressedSize, "LZ4_decompress_fast_withDict did not read all compressed block input");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_fast_withDict overrun specified output buffer size")
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_fast_withDict corrupted decoded data");
FUZ_DISPLAYTEST;
decodedBuffer[blockSize] = 0;
ret = LZ4_decompress_safe_withDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize, dict, dictSize);
FUZ_CHECKTEST(ret!=blockSize, "LZ4_decompress_safe_withDict did not regenerate original data");
FUZ_CHECKTEST(decodedBuffer[blockSize], "LZ4_decompress_safe_withDict overrun specified output buffer size")
crcCheck = XXH32(decodedBuffer, blockSize, 0);
FUZ_CHECKTEST(crcCheck!=crcOrig, "LZ4_decompress_safe_withDict corrupted decoded data");
FUZ_DISPLAYTEST;
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_fast_withDict(compressedBuffer, decodedBuffer, blockSize-1, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_fast_withDict should have failed : wrong original size (-1 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_fast_withDict overrun specified output buffer size");
FUZ_DISPLAYTEST;
decodedBuffer[blockSize-1] = 0;
ret = LZ4_decompress_safe_withDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-1, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_withDict should have failed : not enough output size (-1 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-1], "LZ4_decompress_safe_withDict overrun specified output buffer size");
FUZ_DISPLAYTEST;
if (blockSize > 10)
{
decodedBuffer[blockSize-10] = 0;
ret = LZ4_decompress_safe_withDict(compressedBuffer, decodedBuffer, blockContinueCompressedSize, blockSize-10, dict, dictSize);
FUZ_CHECKTEST(ret>=0, "LZ4_decompress_safe_withDict should have failed : not enough output size (-10 byte)");
FUZ_CHECKTEST(decodedBuffer[blockSize-10], "LZ4_decompress_safe_withDict overrun specified output buffer size (-10 byte) (blockSize=%i)", blockSize);
}
// Fill stats
bytes += blockSize;
cbytes += compressedSize;
hcbytes += HCcompressedSize;
ccbytes += blockContinueCompressedSize;
}
printf("\r%7i /%7i - ", attemptNb, nbTests);
printf("all tests completed successfully \n");
printf("compression ratio: %0.3f%%\n", (double)cbytes/bytes*100);
printf("HC compression ratio: %0.3f%%\n", (double)hcbytes/bytes*100);
printf("ratio with dict: %0.3f%%\n", (double)ccbytes/bytes*100);
// unalloc
if(!no_prompt) getchar();
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
free(stateLZ4);
free(stateLZ4HC);
return 0;
_output_error:
if(!no_prompt) getchar();
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
free(stateLZ4);
free(stateLZ4HC);
return 1;
}
int FUZ_usage()
{
DISPLAY( "Usage :\n");
DISPLAY( " %s [args]\n", programName);
DISPLAY( "\n");
DISPLAY( "Arguments :\n");
DISPLAY( " -i# : Nb of tests (default:%i) \n", NB_ATTEMPTS);
DISPLAY( " -s# : Select seed (default:prompt user)\n");
DISPLAY( " -p# : Select compressibility in %% (default:%i%%)\n", FUZ_COMPRESSIBILITY_DEFAULT);
DISPLAY( " -h : display help and exit\n");
return 0;
}
int main(int argc, char** argv) {
char userInput[50] = {0};
U32 timestamp = FUZ_GetMilliStart();
U32 seed=0;
int seedset=0;
int argNb;
int nbTests = NB_ATTEMPTS;
int proba = FUZ_COMPRESSIBILITY_DEFAULT;
// Check command line
programName = argv[0];
for(argNb=1; argNb<argc; argNb++)
{
char* argument = argv[argNb];
if(!argument) continue; // Protection if argument empty
// Decode command (note : aggregated commands are allowed)
if (argument[0]=='-')
{
if (!strcmp(argument, "--no-prompt")) { no_prompt=1; seedset=1; continue; }
while (argument[1]!=0)
{
argument++;
switch(*argument)
{
case 'h':
return FUZ_usage();
case 'i':
argument++;
nbTests=0;
while ((*argument>='0') && (*argument<='9'))
{
nbTests *= 10;
nbTests += *argument - '0';
argument++;
}
break;
case 's':
argument++;
seed=0; seedset=1;
while ((*argument>='0') && (*argument<='9'))
{
seed *= 10;
seed += *argument - '0';
argument++;
}
break;
case 'p':
argument++;
proba=0;
while ((*argument>='0') && (*argument<='9'))
{
proba *= 10;
proba += *argument - '0';
argument++;
}
if (proba<0) proba=0;
if (proba>100) proba=100;
break;
default: ;
}
}
}
}
// Get Seed
printf("Starting LZ4 fuzzer (%i-bits, %s)\n", (int)(sizeof(size_t)*8), LZ4_VERSION);
if (!seedset)
{
printf("Select an Initialisation number (default : random) : ");
fflush(stdout);
if ( no_prompt || fgets(userInput, sizeof userInput, stdin) )
{
if ( sscanf(userInput, "%u", &seed) == 1 ) {}
else seed = FUZ_GetMilliSpan(timestamp);
}
}
printf("Seed = %u\n", seed);
if (proba!=FUZ_COMPRESSIBILITY_DEFAULT) printf("Compressibility : %i%%\n", proba);
//FUZ_SecurityTest();
if (nbTests<=0) nbTests=1;
return FUZ_test(seed, nbTests, ((double)proba) / 100);
}
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