summaryrefslogtreecommitdiffstats
path: root/src/zstd/tests/fullbench.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/zstd/tests/fullbench.c638
1 files changed, 638 insertions, 0 deletions
diff --git a/src/zstd/tests/fullbench.c b/src/zstd/tests/fullbench.c
new file mode 100644
index 00000000..db00ce21
--- /dev/null
+++ b/src/zstd/tests/fullbench.c
@@ -0,0 +1,638 @@
+/*
+ * Copyright (c) 2015-present, Yann Collet, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ * You may select, at your option, one of the above-listed licenses.
+ */
+
+
+/*_************************************
+* Includes
+**************************************/
+#include "util.h" /* Compiler options, UTIL_GetFileSize */
+#include <stdlib.h> /* malloc */
+#include <stdio.h> /* fprintf, fopen, ftello64 */
+
+#include "mem.h" /* U32 */
+#ifndef ZSTD_DLL_IMPORT
+ #include "zstd_internal.h" /* ZSTD_blockHeaderSize, blockType_e, KB, MB */
+#else
+ #define KB *(1 <<10)
+ #define MB *(1 <<20)
+ #define GB *(1U<<30)
+ typedef enum { bt_raw, bt_rle, bt_compressed, bt_reserved } blockType_e;
+#endif
+#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_compressBegin, ZSTD_compressContinue, etc. */
+#include "zstd.h" /* ZSTD_versionString */
+#include "util.h" /* time functions */
+#include "datagen.h"
+
+
+/*_************************************
+* Constants
+**************************************/
+#define PROGRAM_DESCRIPTION "Zstandard speed analyzer"
+#define AUTHOR "Yann Collet"
+#define WELCOME_MESSAGE "*** %s %s %i-bits, by %s (%s) ***\n", PROGRAM_DESCRIPTION, ZSTD_versionString(), (int)(sizeof(void*)*8), AUTHOR, __DATE__
+
+#define NBLOOPS 6
+#define TIMELOOP_S 2
+
+#define KNUTH 2654435761U
+#define MAX_MEM (1984 MB)
+
+#define COMPRESSIBILITY_DEFAULT 0.50
+static const size_t g_sampleSize = 10000000;
+
+
+/*_************************************
+* Macros
+**************************************/
+#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
+
+
+/*_************************************
+* Benchmark Parameters
+**************************************/
+static U32 g_nbIterations = NBLOOPS;
+static double g_compressibility = COMPRESSIBILITY_DEFAULT;
+
+static void BMK_SetNbIterations(U32 nbLoops)
+{
+ g_nbIterations = nbLoops;
+ DISPLAY("- %i iterations -\n", g_nbIterations);
+}
+
+
+/*_*******************************************************
+* Private functions
+*********************************************************/
+static size_t BMK_findMaxMem(U64 requiredMem)
+{
+ size_t const step = 64 MB;
+ void* testmem = NULL;
+
+ requiredMem = (((requiredMem >> 26) + 1) << 26);
+ if (requiredMem > MAX_MEM) requiredMem = MAX_MEM;
+
+ requiredMem += step;
+ do {
+ testmem = malloc ((size_t)requiredMem);
+ requiredMem -= step;
+ } while (!testmem);
+
+ free (testmem);
+ return (size_t) requiredMem;
+}
+
+
+/*_*******************************************************
+* Benchmark wrappers
+*********************************************************/
+size_t local_ZSTD_compress(void* dst, size_t dstSize, void* buff2, const void* src, size_t srcSize)
+{
+ (void)buff2;
+ return ZSTD_compress(dst, dstSize, src, srcSize, 1);
+}
+
+static size_t g_cSize = 0;
+size_t local_ZSTD_decompress(void* dst, size_t dstSize, void* buff2, const void* src, size_t srcSize)
+{
+ (void)src; (void)srcSize;
+ return ZSTD_decompress(dst, dstSize, buff2, g_cSize);
+}
+
+static ZSTD_DCtx* g_zdc = NULL;
+
+#ifndef ZSTD_DLL_IMPORT
+extern size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
+size_t local_ZSTD_decodeLiteralsBlock(void* dst, size_t dstSize, void* buff2, const void* src, size_t srcSize)
+{
+ (void)src; (void)srcSize; (void)dst; (void)dstSize;
+ return ZSTD_decodeLiteralsBlock((ZSTD_DCtx*)g_zdc, buff2, g_cSize);
+}
+
+extern size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx* dctx, int* nbSeq, const void* src, size_t srcSize);
+size_t local_ZSTD_decodeSeqHeaders(void* dst, size_t dstSize, void* buff2, const void* src, size_t srcSize)
+{
+ int nbSeq;
+ (void)src; (void)srcSize; (void)dst; (void)dstSize;
+ return ZSTD_decodeSeqHeaders(g_zdc, &nbSeq, buff2, g_cSize);
+}
+#endif
+
+static ZSTD_CStream* g_cstream= NULL;
+size_t local_ZSTD_compressStream(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ ZSTD_outBuffer buffOut;
+ ZSTD_inBuffer buffIn;
+ (void)buff2;
+ ZSTD_initCStream(g_cstream, 1);
+ buffOut.dst = dst;
+ buffOut.size = dstCapacity;
+ buffOut.pos = 0;
+ buffIn.src = src;
+ buffIn.size = srcSize;
+ buffIn.pos = 0;
+ ZSTD_compressStream(g_cstream, &buffOut, &buffIn);
+ ZSTD_endStream(g_cstream, &buffOut);
+ return buffOut.pos;
+}
+
+static size_t local_ZSTD_compress_generic_end(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ ZSTD_outBuffer buffOut;
+ ZSTD_inBuffer buffIn;
+ (void)buff2;
+ ZSTD_CCtx_setParameter(g_cstream, ZSTD_p_compressionLevel, 1);
+ buffOut.dst = dst;
+ buffOut.size = dstCapacity;
+ buffOut.pos = 0;
+ buffIn.src = src;
+ buffIn.size = srcSize;
+ buffIn.pos = 0;
+ ZSTD_compress_generic(g_cstream, &buffOut, &buffIn, ZSTD_e_end);
+ return buffOut.pos;
+}
+
+static size_t local_ZSTD_compress_generic_continue(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ ZSTD_outBuffer buffOut;
+ ZSTD_inBuffer buffIn;
+ (void)buff2;
+ ZSTD_CCtx_setParameter(g_cstream, ZSTD_p_compressionLevel, 1);
+ buffOut.dst = dst;
+ buffOut.size = dstCapacity;
+ buffOut.pos = 0;
+ buffIn.src = src;
+ buffIn.size = srcSize;
+ buffIn.pos = 0;
+ ZSTD_compress_generic(g_cstream, &buffOut, &buffIn, ZSTD_e_continue);
+ ZSTD_compress_generic(g_cstream, &buffOut, &buffIn, ZSTD_e_end);
+ return buffOut.pos;
+}
+
+static size_t local_ZSTD_compress_generic_T2_end(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ ZSTD_outBuffer buffOut;
+ ZSTD_inBuffer buffIn;
+ (void)buff2;
+ ZSTD_CCtx_setParameter(g_cstream, ZSTD_p_compressionLevel, 1);
+ ZSTD_CCtx_setParameter(g_cstream, ZSTD_p_nbThreads, 2);
+ buffOut.dst = dst;
+ buffOut.size = dstCapacity;
+ buffOut.pos = 0;
+ buffIn.src = src;
+ buffIn.size = srcSize;
+ buffIn.pos = 0;
+ while (ZSTD_compress_generic(g_cstream, &buffOut, &buffIn, ZSTD_e_end)) {}
+ return buffOut.pos;
+}
+
+static size_t local_ZSTD_compress_generic_T2_continue(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ ZSTD_outBuffer buffOut;
+ ZSTD_inBuffer buffIn;
+ (void)buff2;
+ ZSTD_CCtx_setParameter(g_cstream, ZSTD_p_compressionLevel, 1);
+ ZSTD_CCtx_setParameter(g_cstream, ZSTD_p_nbThreads, 2);
+ buffOut.dst = dst;
+ buffOut.size = dstCapacity;
+ buffOut.pos = 0;
+ buffIn.src = src;
+ buffIn.size = srcSize;
+ buffIn.pos = 0;
+ ZSTD_compress_generic(g_cstream, &buffOut, &buffIn, ZSTD_e_continue);
+ while(ZSTD_compress_generic(g_cstream, &buffOut, &buffIn, ZSTD_e_end)) {}
+ return buffOut.pos;
+}
+
+static ZSTD_DStream* g_dstream= NULL;
+static size_t local_ZSTD_decompressStream(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ ZSTD_outBuffer buffOut;
+ ZSTD_inBuffer buffIn;
+ (void)src; (void)srcSize;
+ ZSTD_initDStream(g_dstream);
+ buffOut.dst = dst;
+ buffOut.size = dstCapacity;
+ buffOut.pos = 0;
+ buffIn.src = buff2;
+ buffIn.size = g_cSize;
+ buffIn.pos = 0;
+ ZSTD_decompressStream(g_dstream, &buffOut, &buffIn);
+ return buffOut.pos;
+}
+
+static ZSTD_CCtx* g_zcc = NULL;
+
+#ifndef ZSTD_DLL_IMPORT
+size_t local_ZSTD_compressContinue(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ (void)buff2;
+ ZSTD_compressBegin(g_zcc, 1);
+ return ZSTD_compressEnd(g_zcc, dst, dstCapacity, src, srcSize);
+}
+
+#define FIRST_BLOCK_SIZE 8
+size_t local_ZSTD_compressContinue_extDict(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ BYTE firstBlockBuf[FIRST_BLOCK_SIZE];
+
+ (void)buff2;
+ memcpy(firstBlockBuf, src, FIRST_BLOCK_SIZE);
+ ZSTD_compressBegin(g_zcc, 1);
+
+ { size_t const compressResult = ZSTD_compressContinue(g_zcc, dst, dstCapacity, firstBlockBuf, FIRST_BLOCK_SIZE);
+ if (ZSTD_isError(compressResult)) { DISPLAY("local_ZSTD_compressContinue_extDict error : %s\n", ZSTD_getErrorName(compressResult)); return compressResult; }
+ dst = (BYTE*)dst + compressResult;
+ dstCapacity -= compressResult;
+ }
+ return ZSTD_compressEnd(g_zcc, dst, dstCapacity, (const BYTE*)src + FIRST_BLOCK_SIZE, srcSize - FIRST_BLOCK_SIZE);
+}
+
+size_t local_ZSTD_decompressContinue(void* dst, size_t dstCapacity, void* buff2, const void* src, size_t srcSize)
+{
+ size_t regeneratedSize = 0;
+ const BYTE* ip = (const BYTE*)buff2;
+ const BYTE* const iend = ip + g_cSize;
+ BYTE* op = (BYTE*)dst;
+ size_t remainingCapacity = dstCapacity;
+
+ (void)src; (void)srcSize;
+ ZSTD_decompressBegin(g_zdc);
+ while (ip < iend) {
+ size_t const iSize = ZSTD_nextSrcSizeToDecompress(g_zdc);
+ size_t const decodedSize = ZSTD_decompressContinue(g_zdc, op, remainingCapacity, ip, iSize);
+ ip += iSize;
+ regeneratedSize += decodedSize;
+ op += decodedSize;
+ remainingCapacity -= decodedSize;
+ }
+
+ return regeneratedSize;
+}
+#endif
+
+
+/*_*******************************************************
+* Bench functions
+*********************************************************/
+static size_t benchMem(const void* src, size_t srcSize, U32 benchNb)
+{
+ BYTE* dstBuff;
+ size_t const dstBuffSize = ZSTD_compressBound(srcSize);
+ void* buff2;
+ const char* benchName;
+ size_t (*benchFunction)(void* dst, size_t dstSize, void* verifBuff, const void* src, size_t srcSize);
+ double bestTime = 100000000.;
+
+ /* Selection */
+ switch(benchNb)
+ {
+ case 1:
+ benchFunction = local_ZSTD_compress; benchName = "compress(1)";
+ break;
+ case 2:
+ benchFunction = local_ZSTD_decompress; benchName = "decompress";
+ break;
+#ifndef ZSTD_DLL_IMPORT
+ case 11:
+ benchFunction = local_ZSTD_compressContinue; benchName = "compressContinue(1)";
+ break;
+ case 12:
+ benchFunction = local_ZSTD_compressContinue_extDict; benchName = "compressContinue_extDict";
+ break;
+ case 13:
+ benchFunction = local_ZSTD_decompressContinue; benchName = "decompressContinue";
+ break;
+ case 31:
+ benchFunction = local_ZSTD_decodeLiteralsBlock; benchName = "decodeLiteralsBlock";
+ break;
+ case 32:
+ benchFunction = local_ZSTD_decodeSeqHeaders; benchName = "decodeSeqHeaders";
+ break;
+#endif
+ case 41:
+ benchFunction = local_ZSTD_compressStream; benchName = "compressStream(1)";
+ break;
+ case 42:
+ benchFunction = local_ZSTD_decompressStream; benchName = "decompressStream";
+ break;
+ case 51:
+ benchFunction = local_ZSTD_compress_generic_continue; benchName = "compress_generic, continue";
+ break;
+ case 52:
+ benchFunction = local_ZSTD_compress_generic_end; benchName = "compress_generic, end";
+ break;
+ case 61:
+ benchFunction = local_ZSTD_compress_generic_T2_continue; benchName = "compress_generic, -T2, continue";
+ break;
+ case 62:
+ benchFunction = local_ZSTD_compress_generic_T2_end; benchName = "compress_generic, -T2, end";
+ break;
+ default :
+ return 0;
+ }
+
+ /* Allocation */
+ dstBuff = (BYTE*)malloc(dstBuffSize);
+ buff2 = malloc(dstBuffSize);
+ if ((!dstBuff) || (!buff2)) {
+ DISPLAY("\nError: not enough memory!\n");
+ free(dstBuff); free(buff2);
+ return 12;
+ }
+ if (g_zcc==NULL) g_zcc = ZSTD_createCCtx();
+ if (g_zdc==NULL) g_zdc = ZSTD_createDCtx();
+ if (g_cstream==NULL) g_cstream = ZSTD_createCStream();
+ if (g_dstream==NULL) g_dstream = ZSTD_createDStream();
+
+ /* Preparation */
+ switch(benchNb)
+ {
+ case 2:
+ g_cSize = ZSTD_compress(buff2, dstBuffSize, src, srcSize, 1);
+ break;
+#ifndef ZSTD_DLL_IMPORT
+ case 13 :
+ g_cSize = ZSTD_compress(buff2, dstBuffSize, src, srcSize, 1);
+ break;
+ case 31: /* ZSTD_decodeLiteralsBlock */
+ { blockProperties_t bp;
+ ZSTD_frameHeader zfp;
+ size_t frameHeaderSize, skippedSize;
+ g_cSize = ZSTD_compress(dstBuff, dstBuffSize, src, srcSize, 1);
+ frameHeaderSize = ZSTD_getFrameHeader(&zfp, dstBuff, ZSTD_frameHeaderSize_min);
+ if (frameHeaderSize==0) frameHeaderSize = ZSTD_frameHeaderSize_min;
+ ZSTD_getcBlockSize(dstBuff+frameHeaderSize, dstBuffSize, &bp); /* Get 1st block type */
+ if (bp.blockType != bt_compressed) {
+ DISPLAY("ZSTD_decodeLiteralsBlock : impossible to test on this sample (not compressible)\n");
+ goto _cleanOut;
+ }
+ skippedSize = frameHeaderSize + ZSTD_blockHeaderSize;
+ memcpy(buff2, dstBuff+skippedSize, g_cSize-skippedSize);
+ srcSize = srcSize > 128 KB ? 128 KB : srcSize; /* speed relative to block */
+ ZSTD_decompressBegin(g_zdc);
+ break;
+ }
+ case 32: /* ZSTD_decodeSeqHeaders */
+ { blockProperties_t bp;
+ ZSTD_frameHeader zfp;
+ const BYTE* ip = dstBuff;
+ const BYTE* iend;
+ size_t frameHeaderSize, cBlockSize;
+ ZSTD_compress(dstBuff, dstBuffSize, src, srcSize, 1); /* it would be better to use direct block compression here */
+ g_cSize = ZSTD_compress(dstBuff, dstBuffSize, src, srcSize, 1);
+ frameHeaderSize = ZSTD_getFrameHeader(&zfp, dstBuff, ZSTD_frameHeaderSize_min);
+ if (frameHeaderSize==0) frameHeaderSize = ZSTD_frameHeaderSize_min;
+ ip += frameHeaderSize; /* Skip frame Header */
+ cBlockSize = ZSTD_getcBlockSize(ip, dstBuffSize, &bp); /* Get 1st block type */
+ if (bp.blockType != bt_compressed) {
+ DISPLAY("ZSTD_decodeSeqHeaders : impossible to test on this sample (not compressible)\n");
+ goto _cleanOut;
+ }
+ iend = ip + ZSTD_blockHeaderSize + cBlockSize; /* End of first block */
+ ip += ZSTD_blockHeaderSize; /* skip block header */
+ ZSTD_decompressBegin(g_zdc);
+ ip += ZSTD_decodeLiteralsBlock(g_zdc, ip, iend-ip); /* skip literal segment */
+ g_cSize = iend-ip;
+ memcpy(buff2, ip, g_cSize); /* copy rest of block (it starts by SeqHeader) */
+ srcSize = srcSize > 128 KB ? 128 KB : srcSize; /* speed relative to block */
+ break;
+ }
+#else
+ case 31:
+ goto _cleanOut;
+#endif
+ case 42 :
+ g_cSize = ZSTD_compress(buff2, dstBuffSize, src, srcSize, 1);
+ break;
+
+ /* test functions */
+ /* by convention, test functions can be added > 100 */
+
+ default : ;
+ }
+
+ { size_t i; for (i=0; i<dstBuffSize; i++) dstBuff[i]=(BYTE)i; } /* warming up memory */
+
+ { U32 loopNb;
+# define TIME_SEC_MICROSEC (1*1000000ULL) /* 1 second */
+ U64 const clockLoop = TIMELOOP_S * TIME_SEC_MICROSEC;
+ DISPLAY("%2i- %-30.30s : \r", benchNb, benchName);
+ for (loopNb = 1; loopNb <= g_nbIterations; loopNb++) {
+ UTIL_time_t clockStart;
+ size_t benchResult=0;
+ U32 nbRounds;
+
+ UTIL_sleepMilli(1); /* give processor time to other processes */
+ UTIL_waitForNextTick();
+ clockStart = UTIL_getTime();
+ for (nbRounds=0; UTIL_clockSpanMicro(clockStart) < clockLoop; nbRounds++) {
+ benchResult = benchFunction(dstBuff, dstBuffSize, buff2, src, srcSize);
+ if (ZSTD_isError(benchResult)) { DISPLAY("ERROR ! %s() => %s !! \n", benchName, ZSTD_getErrorName(benchResult)); exit(1); }
+ }
+ { U64 const clockSpanMicro = UTIL_clockSpanMicro(clockStart);
+ double const averageTime = (double)clockSpanMicro / TIME_SEC_MICROSEC / nbRounds;
+ if (averageTime < bestTime) bestTime = averageTime;
+ DISPLAY("%2i- %-30.30s : %7.1f MB/s (%9u)\r", loopNb, benchName, (double)srcSize / (1 MB) / bestTime, (U32)benchResult);
+ } } }
+ DISPLAY("%2u\n", benchNb);
+
+_cleanOut:
+ free(dstBuff);
+ free(buff2);
+ ZSTD_freeCCtx(g_zcc); g_zcc=NULL;
+ ZSTD_freeDCtx(g_zdc); g_zdc=NULL;
+ ZSTD_freeCStream(g_cstream); g_cstream=NULL;
+ ZSTD_freeDStream(g_dstream); g_dstream=NULL;
+ return 0;
+}
+
+
+static int benchSample(U32 benchNb)
+{
+ size_t const benchedSize = g_sampleSize;
+ const char* name = "Sample 10MiB";
+
+ /* Allocation */
+ void* origBuff = malloc(benchedSize);
+ if (!origBuff) { DISPLAY("\nError: not enough memory!\n"); return 12; }
+
+ /* Fill buffer */
+ RDG_genBuffer(origBuff, benchedSize, g_compressibility, 0.0, 0);
+
+ /* bench */
+ DISPLAY("\r%79s\r", "");
+ DISPLAY(" %s : \n", name);
+ if (benchNb)
+ benchMem(origBuff, benchedSize, benchNb);
+ else
+ for (benchNb=0; benchNb<100; benchNb++) benchMem(origBuff, benchedSize, benchNb);
+
+ free(origBuff);
+ return 0;
+}
+
+
+static int benchFiles(const char** fileNamesTable, const int nbFiles, U32 benchNb)
+{
+ /* Loop for each file */
+ int fileIdx;
+ for (fileIdx=0; fileIdx<nbFiles; fileIdx++) {
+ const char* inFileName = fileNamesTable[fileIdx];
+ FILE* inFile = fopen( inFileName, "rb" );
+ U64 inFileSize;
+ size_t benchedSize;
+ void* origBuff;
+
+ /* Check file existence */
+ if (inFile==NULL) { DISPLAY( "Pb opening %s\n", inFileName); return 11; }
+
+ /* Memory allocation & restrictions */
+ inFileSize = UTIL_getFileSize(inFileName);
+ benchedSize = BMK_findMaxMem(inFileSize*3) / 3;
+ if ((U64)benchedSize > inFileSize) benchedSize = (size_t)inFileSize;
+ if (benchedSize < inFileSize)
+ DISPLAY("Not enough memory for '%s' full size; testing %u MB only...\n", inFileName, (U32)(benchedSize>>20));
+
+ /* Alloc */
+ origBuff = malloc(benchedSize);
+ if (!origBuff) { DISPLAY("\nError: not enough memory!\n"); fclose(inFile); return 12; }
+
+ /* Fill input buffer */
+ DISPLAY("Loading %s... \r", inFileName);
+ {
+ size_t readSize = fread(origBuff, 1, benchedSize, inFile);
+ fclose(inFile);
+ if (readSize != benchedSize) {
+ DISPLAY("\nError: problem reading file '%s' !! \n", inFileName);
+ free(origBuff);
+ return 13;
+ } }
+
+ /* bench */
+ DISPLAY("\r%79s\r", "");
+ DISPLAY(" %s : \n", inFileName);
+ if (benchNb)
+ benchMem(origBuff, benchedSize, benchNb);
+ else
+ for (benchNb=0; benchNb<100; benchNb++) benchMem(origBuff, benchedSize, benchNb);
+
+ free(origBuff);
+ }
+
+ return 0;
+}
+
+
+static int usage(const char* exename)
+{
+ DISPLAY( "Usage :\n");
+ DISPLAY( " %s [arg] file1 file2 ... fileX\n", exename);
+ DISPLAY( "Arguments :\n");
+ DISPLAY( " -H/-h : Help (this text + advanced options)\n");
+ return 0;
+}
+
+static int usage_advanced(const char* exename)
+{
+ usage(exename);
+ DISPLAY( "\nAdvanced options :\n");
+ DISPLAY( " -b# : test only function # \n");
+ DISPLAY( " -i# : iteration loops [1-9](default : %i)\n", NBLOOPS);
+ DISPLAY( " -P# : sample compressibility (default : %.1f%%)\n", COMPRESSIBILITY_DEFAULT * 100);
+ return 0;
+}
+
+static int badusage(const char* exename)
+{
+ DISPLAY("Wrong parameters\n");
+ usage(exename);
+ return 1;
+}
+
+int main(int argc, const char** argv)
+{
+ int i, filenamesStart=0, result;
+ const char* exename = argv[0];
+ const char* input_filename = NULL;
+ U32 benchNb = 0, main_pause = 0;
+
+ DISPLAY(WELCOME_MESSAGE);
+ if (argc<1) return badusage(exename);
+
+ for(i=1; i<argc; i++) {
+ const char* argument = argv[i];
+ if(!argument) continue; /* Protection if argument empty */
+
+ /* Commands (note : aggregated commands are allowed) */
+ if (argument[0]=='-') {
+
+ while (argument[1]!=0) {
+ argument++;
+
+ switch(argument[0])
+ {
+ /* Display help on usage */
+ case 'h':
+ case 'H': return usage_advanced(exename);
+
+ /* Pause at the end (hidden option) */
+ case 'p': main_pause = 1; break;
+
+ /* Select specific algorithm to bench */
+ case 'b':
+ benchNb = 0;
+ while ((argument[1]>= '0') && (argument[1]<= '9')) {
+ benchNb *= 10;
+ benchNb += argument[1] - '0';
+ argument++;
+ }
+ break;
+
+ /* Modify Nb Iterations */
+ case 'i':
+ if ((argument[1] >='0') && (argument[1] <='9')) {
+ int iters = argument[1] - '0';
+ BMK_SetNbIterations(iters);
+ argument++;
+ }
+ break;
+
+ /* Select compressibility of synthetic sample */
+ case 'P':
+ { U32 proba32 = 0;
+ while ((argument[1]>= '0') && (argument[1]<= '9')) {
+ proba32 *= 10;
+ proba32 += argument[1] - '0';
+ argument++;
+ }
+ g_compressibility = (double)proba32 / 100.;
+ }
+ break;
+
+ /* Unknown command */
+ default : return badusage(exename);
+ }
+ }
+ continue;
+ }
+
+ /* first provided filename is input */
+ if (!input_filename) { input_filename=argument; filenamesStart=i; continue; }
+ }
+
+ if (filenamesStart==0) /* no input file */
+ result = benchSample(benchNb);
+ else
+ result = benchFiles(argv+filenamesStart, argc-filenamesStart, benchNb);
+
+ if (main_pause) { int unused; printf("press enter...\n"); unused = getchar(); (void)unused; }
+
+ return result;
+}