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/*
frameTest - test tool for lz4frame
Copyright (C) Yann Collet 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 source repository : http://code.google.com/p/lz4/
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/**************************************
Compiler specific
**************************************/
#define _CRT_SECURE_NO_WARNINGS // fgets
#ifdef _MSC_VER /* Visual Studio */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
# pragma warning(disable : 4146) /* disable: C4146: minus unsigned expression */
#endif
/**************************************
Includes
**************************************/
#include <stdlib.h>
#include <stdio.h> // fgets, sscanf
#include <sys/timeb.h> // timeb
#include <string.h> // strcmp
#include "lz4frame.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 ""
#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
#define KB *(1U<<10)
#define MB *(1U<<20)
#define GB *(1U<<30)
/**************************************
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;
static int displayLevel = 2;
/*********************************************************
Fuzzer functions
*********************************************************/
static int FUZ_GetMilliStart(void)
{
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 >> 3;
}
#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);
}
}
}
#define FUZ_MAX(a,b) (a>b?a:b)
int frameTest(U32 seed, int nbCycles, int startCycle, double compressibility)
{
int testResult = 0;
void* CNBuffer;
void* compressedBuffer;
void* decodedBuffer;
U32 randState = seed;
size_t cSize;
(void)nbCycles; (void)startCycle;
// Create compressible test buffer
CNBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
FUZ_fillCompressibleNoiseBuffer(CNBuffer, COMPRESSIBLE_NOISE_LENGTH, compressibility, &randState);
compressedBuffer = malloc(LZ4F_compressFrameBound(COMPRESSIBLE_NOISE_LENGTH, NULL));
decodedBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
// Trivial test : one-step frame, all default
cSize = LZ4F_compressFrame(compressedBuffer, LZ4F_compressFrameBound(64 KB, NULL), CNBuffer, 64 KB, NULL);
if (LZ4F_isError(cSize)) goto _output_error;
DISPLAY("Compressed %i bytes into a %i bytes frame \n", 64 KB, (int)cSize);
_end:
free(CNBuffer);
free(compressedBuffer);
free(decodedBuffer);
return testResult;
_output_error:
testResult = 1;
if(!no_prompt) getchar();
goto _end;
}
int FUZ_usage(void)
{
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( " -t# : Select starting test number (default:0)\n");
DISPLAY( " -p# : Select compressibility in %% (default:%i%%)\n", FUZ_COMPRESSIBILITY_DEFAULT);
DISPLAY( " -v : verbose\n");
DISPLAY( " -h : display help and exit\n");
return 0;
}
int main(int argc, char** argv) {
U32 timestamp = FUZ_GetMilliStart();
U32 seed=0;
int seedset=0;
int argNb;
int nbTests = NB_ATTEMPTS;
int testNb = 0;
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; displayLevel=1; continue; }
while (argument[1]!=0)
{
argument++;
switch(*argument)
{
case 'h':
return FUZ_usage();
case 'v':
argument++;
displayLevel=4;
break;
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 't':
argument++;
testNb=0;
while ((*argument>='0') && (*argument<='9'))
{
testNb *= 10;
testNb += *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 lz4frame tester (%i-bits, %s)\n", (int)(sizeof(size_t)*8), LZ4_VERSION);
if (!seedset)
{
char userInput[50] = {0};
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);
if (nbTests<=0) nbTests=1;
return frameTest(seed, nbTests, testNb, ((double)proba) / 100);
}
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