예제 #1
0
파일: zstdcli.c 프로젝트: tarantool/zstd
int main(int argCount, const char* argv[])
{
    int argNb,
        forceStdout=0,
        followLinks=0,
        main_pause=0,
        nextEntryIsDictionary=0,
        operationResult=0,
        nextArgumentIsOutFileName=0,
        nextArgumentIsMaxDict=0,
        nextArgumentIsDictID=0,
        nextArgumentsAreFiles=0,
        ultra=0,
        lastCommand = 0,
        nbThreads = 1,
        setRealTimePrio = 0,
        separateFiles = 0,
        ldmFlag = 0;
    unsigned bench_nbSeconds = 3;   /* would be better if this value was synchronized from bench */
    size_t blockSize = 0;
    zstd_operation_mode operation = zom_compress;
    ZSTD_compressionParameters compressionParams;
    int cLevel = ZSTDCLI_CLEVEL_DEFAULT;
    int cLevelLast = 1;
    unsigned recursive = 0;
    unsigned memLimit = 0;
    const char** filenameTable = (const char**)malloc(argCount * sizeof(const char*));   /* argCount >= 1 */
    unsigned filenameIdx = 0;
    const char* programName = argv[0];
    const char* outFileName = NULL;
    const char* dictFileName = NULL;
    const char* suffix = ZSTD_EXTENSION;
    unsigned maxDictSize = g_defaultMaxDictSize;
    unsigned dictID = 0;
    int dictCLevel = g_defaultDictCLevel;
    unsigned dictSelect = g_defaultSelectivityLevel;
#ifdef UTIL_HAS_CREATEFILELIST
    const char** extendedFileList = NULL;
    char* fileNamesBuf = NULL;
    unsigned fileNamesNb;
#endif
#ifndef ZSTD_NODICT
    ZDICT_cover_params_t coverParams = defaultCoverParams();
    int cover = 1;
#endif


    /* init */
    (void)recursive; (void)cLevelLast;    /* not used when ZSTD_NOBENCH set */
    (void)dictCLevel; (void)dictSelect; (void)dictID;  (void)maxDictSize; /* not used when ZSTD_NODICT set */
    (void)ultra; (void)cLevel; (void)ldmFlag; /* not used when ZSTD_NOCOMPRESS set */
    (void)memLimit;   /* not used when ZSTD_NODECOMPRESS set */
    if (filenameTable==NULL) { DISPLAY("zstd: %s \n", strerror(errno)); exit(1); }
    filenameTable[0] = stdinmark;
    g_displayOut = stderr;

    programName = lastNameFromPath(programName);

    /* preset behaviors */
    if (exeNameMatch(programName, ZSTD_ZSTDMT)) nbThreads=0;
    if (exeNameMatch(programName, ZSTD_UNZSTD)) operation=zom_decompress;
    if (exeNameMatch(programName, ZSTD_CAT)) { operation=zom_decompress; forceStdout=1; FIO_overwriteMode(); outFileName=stdoutmark; g_displayLevel=1; }
    if (exeNameMatch(programName, ZSTD_GZ)) { suffix = GZ_EXTENSION; FIO_setCompressionType(FIO_gzipCompression); FIO_setRemoveSrcFile(1); }    /* behave like gzip */
    if (exeNameMatch(programName, ZSTD_GUNZIP)) { operation=zom_decompress; FIO_setRemoveSrcFile(1); }                                          /* behave like gunzip */
    if (exeNameMatch(programName, ZSTD_GZCAT)) { operation=zom_decompress; forceStdout=1; FIO_overwriteMode(); outFileName=stdoutmark; g_displayLevel=1; }  /* behave like gzcat */
    if (exeNameMatch(programName, ZSTD_LZMA)) { suffix = LZMA_EXTENSION; FIO_setCompressionType(FIO_lzmaCompression); FIO_setRemoveSrcFile(1); }    /* behave like lzma */
    if (exeNameMatch(programName, ZSTD_UNLZMA)) { operation=zom_decompress; FIO_setCompressionType(FIO_lzmaCompression); FIO_setRemoveSrcFile(1); }    /* behave like unlzma */
    if (exeNameMatch(programName, ZSTD_XZ)) { suffix = XZ_EXTENSION; FIO_setCompressionType(FIO_xzCompression); FIO_setRemoveSrcFile(1); }    /* behave like xz */
    if (exeNameMatch(programName, ZSTD_UNXZ)) { operation=zom_decompress; FIO_setCompressionType(FIO_xzCompression); FIO_setRemoveSrcFile(1); }    /* behave like unxz */
    if (exeNameMatch(programName, ZSTD_LZ4)) { suffix = LZ4_EXTENSION; FIO_setCompressionType(FIO_lz4Compression); FIO_setRemoveSrcFile(1); }    /* behave like xz */
    if (exeNameMatch(programName, ZSTD_UNLZ4)) { operation=zom_decompress; FIO_setCompressionType(FIO_lz4Compression); FIO_setRemoveSrcFile(1); }    /* behave like unxz */
    memset(&compressionParams, 0, sizeof(compressionParams));

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

        if (nextArgumentsAreFiles==0) {
            /* "-" means stdin/stdout */
            if (!strcmp(argument, "-")){
                if (!filenameIdx) {
                    filenameIdx=1, filenameTable[0]=stdinmark;
                    outFileName=stdoutmark;
                    g_displayLevel-=(g_displayLevel==2);
                    continue;
            }   }

            /* Decode commands (note : aggregated commands are allowed) */
            if (argument[0]=='-') {

                if (argument[1]=='-') {
                    /* long commands (--long-word) */
                    if (!strcmp(argument, "--")) { nextArgumentsAreFiles=1; continue; }   /* only file names allowed from now on */
                    if (!strcmp(argument, "--list")) { operation=zom_list; continue; }
                    if (!strcmp(argument, "--compress")) { operation=zom_compress; continue; }
                    if (!strcmp(argument, "--decompress")) { operation=zom_decompress; continue; }
                    if (!strcmp(argument, "--uncompress")) { operation=zom_decompress; continue; }
                    if (!strcmp(argument, "--force")) { FIO_overwriteMode(); forceStdout=1; followLinks=1; continue; }
                    if (!strcmp(argument, "--version")) { g_displayOut=stdout; DISPLAY(WELCOME_MESSAGE); CLEAN_RETURN(0); }
                    if (!strcmp(argument, "--help")) { g_displayOut=stdout; CLEAN_RETURN(usage_advanced(programName)); }
                    if (!strcmp(argument, "--verbose")) { g_displayLevel++; continue; }
                    if (!strcmp(argument, "--quiet")) { g_displayLevel--; continue; }
                    if (!strcmp(argument, "--stdout")) { forceStdout=1; outFileName=stdoutmark; g_displayLevel-=(g_displayLevel==2); continue; }
                    if (!strcmp(argument, "--ultra")) { ultra=1; continue; }
                    if (!strcmp(argument, "--check")) { FIO_setChecksumFlag(2); continue; }
                    if (!strcmp(argument, "--no-check")) { FIO_setChecksumFlag(0); continue; }
                    if (!strcmp(argument, "--sparse")) { FIO_setSparseWrite(2); continue; }
                    if (!strcmp(argument, "--no-sparse")) { FIO_setSparseWrite(0); continue; }
                    if (!strcmp(argument, "--test")) { operation=zom_test; continue; }
                    if (!strcmp(argument, "--train")) { operation=zom_train; outFileName=g_defaultDictName; continue; }
                    if (!strcmp(argument, "--maxdict")) { nextArgumentIsMaxDict=1; lastCommand=1; continue; }  /* kept available for compatibility with old syntax ; will be removed one day */
                    if (!strcmp(argument, "--dictID")) { nextArgumentIsDictID=1; lastCommand=1; continue; }  /* kept available for compatibility with old syntax ; will be removed one day */
                    if (!strcmp(argument, "--no-dictID")) { FIO_setDictIDFlag(0); continue; }
                    if (!strcmp(argument, "--keep")) { FIO_setRemoveSrcFile(0); continue; }
                    if (!strcmp(argument, "--rm")) { FIO_setRemoveSrcFile(1); continue; }
                    if (!strcmp(argument, "--priority=rt")) { setRealTimePrio = 1; continue; }
#ifdef ZSTD_GZCOMPRESS
                    if (!strcmp(argument, "--format=gzip")) { suffix = GZ_EXTENSION; FIO_setCompressionType(FIO_gzipCompression); continue; }
#endif
#ifdef ZSTD_LZMACOMPRESS
                    if (!strcmp(argument, "--format=lzma")) { suffix = LZMA_EXTENSION; FIO_setCompressionType(FIO_lzmaCompression);  continue; }
                    if (!strcmp(argument, "--format=xz")) { suffix = XZ_EXTENSION; FIO_setCompressionType(FIO_xzCompression);  continue; }
#endif
#ifdef ZSTD_LZ4COMPRESS
                    if (!strcmp(argument, "--format=lz4")) { suffix = LZ4_EXTENSION; FIO_setCompressionType(FIO_lz4Compression);  continue; }
#endif

                    /* long commands with arguments */
#ifndef ZSTD_NODICT
                    if (longCommandWArg(&argument, "--train-cover")) {
                      operation = zom_train;
                      outFileName = g_defaultDictName;
                      cover = 1;
                      /* Allow optional arguments following an = */
                      if (*argument == 0) { memset(&coverParams, 0, sizeof(coverParams)); }
                      else if (*argument++ != '=') { CLEAN_RETURN(badusage(programName)); }
                      else if (!parseCoverParameters(argument, &coverParams)) { CLEAN_RETURN(badusage(programName)); }
                      continue;
                    }
                    if (longCommandWArg(&argument, "--train-legacy")) {
                      operation = zom_train;
                      outFileName = g_defaultDictName;
                      cover = 0;
                      /* Allow optional arguments following an = */
                      if (*argument == 0) { continue; }
                      else if (*argument++ != '=') { CLEAN_RETURN(badusage(programName)); }
                      else if (!parseLegacyParameters(argument, &dictSelect)) { CLEAN_RETURN(badusage(programName)); }
                      continue;
                    }
#endif
                    if (longCommandWArg(&argument, "--threads=")) { nbThreads = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--memlimit=")) { memLimit = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--memory=")) { memLimit = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--memlimit-decompress=")) { memLimit = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--block-size=")) { blockSize = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--maxdict=")) { maxDictSize = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--dictID=")) { dictID = readU32FromChar(&argument); continue; }
                    if (longCommandWArg(&argument, "--zstd=")) { if (!parseCompressionParameters(argument, &compressionParams)) CLEAN_RETURN(badusage(programName)); continue; }
                    if (longCommandWArg(&argument, "--long")) {
                        unsigned ldmWindowLog = 0;
                        ldmFlag = 1;
                        /* Parse optional window log */
                        if (*argument == '=') {
                            ++argument;
                            ldmWindowLog = readU32FromChar(&argument);
                        } else if (*argument != 0) {
                            /* Invalid character following --long */
                            CLEAN_RETURN(badusage(programName));
                        }
                        /* Only set windowLog if not already set by --zstd */
                        if (compressionParams.windowLog == 0)
                            compressionParams.windowLog = ldmWindowLog;
                        continue;
                    }
                    /* fall-through, will trigger bad_usage() later on */
                }

                argument++;
                while (argument[0]!=0) {
                    if (lastCommand) {
                        DISPLAY("error : command must be followed by argument \n");
                        CLEAN_RETURN(1);
                    }
#ifndef ZSTD_NOCOMPRESS
                    /* compression Level */
                    if ((*argument>='0') && (*argument<='9')) {
                        dictCLevel = cLevel = readU32FromChar(&argument);
                        continue;
                    }
#endif

                    switch(argument[0])
                    {
                        /* Display help */
                    case 'V': g_displayOut=stdout; printVersion(); CLEAN_RETURN(0);   /* Version Only */
                    case 'H':
                    case 'h': g_displayOut=stdout; CLEAN_RETURN(usage_advanced(programName));

                         /* Compress */
                    case 'z': operation=zom_compress; argument++; break;

                         /* Decoding */
                    case 'd':
#ifndef ZSTD_NOBENCH
                            if (operation==zom_bench) { BMK_setDecodeOnlyMode(1); argument++; break; }  /* benchmark decode (hidden option) */
#endif
                            operation=zom_decompress; argument++; break;

                        /* Force stdout, even if stdout==console */
                    case 'c': forceStdout=1; outFileName=stdoutmark; argument++; break;

                        /* Use file content as dictionary */
                    case 'D': nextEntryIsDictionary = 1; lastCommand = 1; argument++; break;

                        /* Overwrite */
                    case 'f': FIO_overwriteMode(); forceStdout=1; followLinks=1; argument++; break;

                        /* Verbose mode */
                    case 'v': g_displayLevel++; argument++; break;

                        /* Quiet mode */
                    case 'q': g_displayLevel--; argument++; break;

                        /* keep source file (default) */
                    case 'k': FIO_setRemoveSrcFile(0); argument++; break;

                        /* Checksum */
                    case 'C': FIO_setChecksumFlag(2); argument++; break;

                        /* test compressed file */
                    case 't': operation=zom_test; argument++; break;

                        /* destination file name */
                    case 'o': nextArgumentIsOutFileName=1; lastCommand=1; argument++; break;

                        /* limit decompression memory */
                    case 'M':
                        argument++;
                        memLimit = readU32FromChar(&argument);
                        break;
                    case 'l': operation=zom_list; argument++; break;
#ifdef UTIL_HAS_CREATEFILELIST
                        /* recursive */
                    case 'r': recursive=1; argument++; break;
#endif

#ifndef ZSTD_NOBENCH
                        /* Benchmark */
                    case 'b':
                        operation=zom_bench;
                        argument++;
                        break;

                        /* range bench (benchmark only) */
                    case 'e':
                        /* compression Level */
                        argument++;
                        cLevelLast = readU32FromChar(&argument);
                        break;

                        /* Modify Nb Iterations (benchmark only) */
                    case 'i':
                        argument++;
                        bench_nbSeconds = readU32FromChar(&argument);
                        break;

                        /* cut input into blocks (benchmark only) */
                    case 'B':
                        argument++;
                        blockSize = readU32FromChar(&argument);
                        break;

                        /* benchmark files separately (hidden option) */
                    case 'S':
                        argument++;
                        separateFiles = 1;
                        break;

#endif   /* ZSTD_NOBENCH */

                        /* nb of threads (hidden option) */
                    case 'T':
                        argument++;
                        nbThreads = readU32FromChar(&argument);
                        break;

                        /* Dictionary Selection level */
                    case 's':
                        argument++;
                        dictSelect = readU32FromChar(&argument);
                        break;

                        /* Pause at the end (-p) or set an additional param (-p#) (hidden option) */
                    case 'p': argument++;
#ifndef ZSTD_NOBENCH
                        if ((*argument>='0') && (*argument<='9')) {
                            BMK_setAdditionalParam(readU32FromChar(&argument));
                        } else
#endif
                            main_pause=1;
                        break;
                        /* unknown command */
                    default : CLEAN_RETURN(badusage(programName));
                    }
                }
                continue;
            }   /* if (argument[0]=='-') */

            if (nextArgumentIsMaxDict) {  /* kept available for compatibility with old syntax ; will be removed one day */
                nextArgumentIsMaxDict = 0;
                lastCommand = 0;
                maxDictSize = readU32FromChar(&argument);
                continue;
            }

            if (nextArgumentIsDictID) {  /* kept available for compatibility with old syntax ; will be removed one day */
                nextArgumentIsDictID = 0;
                lastCommand = 0;
                dictID = readU32FromChar(&argument);
                continue;
            }

        }   /* if (nextArgumentIsAFile==0) */

        if (nextEntryIsDictionary) {
            nextEntryIsDictionary = 0;
            lastCommand = 0;
            dictFileName = argument;
            continue;
        }

        if (nextArgumentIsOutFileName) {
            nextArgumentIsOutFileName = 0;
            lastCommand = 0;
            outFileName = argument;
            if (!strcmp(outFileName, "-")) outFileName = stdoutmark;
            continue;
        }

        /* add filename to list */
        filenameTable[filenameIdx++] = argument;
    }

    if (lastCommand) { /* forgotten argument */
        DISPLAY("error : command must be followed by argument \n");
        CLEAN_RETURN(1);
    }

    /* Welcome message (if verbose) */
    DISPLAYLEVEL(3, WELCOME_MESSAGE);

    if (nbThreads == 0) {
        /* try to guess */
        nbThreads = UTIL_countPhysicalCores();
        DISPLAYLEVEL(3, "Note: %d physical core(s) detected \n", nbThreads);
    }

    g_utilDisplayLevel = g_displayLevel;
    if (!followLinks) {
        unsigned u;
        for (u=0, fileNamesNb=0; u<filenameIdx; u++) {
            if (UTIL_isLink(filenameTable[u])) {
                DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", filenameTable[u]);
            } else {
                filenameTable[fileNamesNb++] = filenameTable[u];
            }
        }
        filenameIdx = fileNamesNb;
    }
#ifdef UTIL_HAS_CREATEFILELIST
    if (recursive) {  /* at this stage, filenameTable is a list of paths, which can contain both files and directories */
        extendedFileList = UTIL_createFileList(filenameTable, filenameIdx, &fileNamesBuf, &fileNamesNb, followLinks);
        if (extendedFileList) {
            unsigned u;
            for (u=0; u<fileNamesNb; u++) DISPLAYLEVEL(4, "%u %s\n", u, extendedFileList[u]);
            free((void*)filenameTable);
            filenameTable = extendedFileList;
            filenameIdx = fileNamesNb;
        }
    }
#endif

    if (operation == zom_list) {
#ifndef ZSTD_NODECOMPRESS
        int const ret = FIO_listMultipleFiles(filenameIdx, filenameTable, g_displayLevel);
        CLEAN_RETURN(ret);
#else
        DISPLAY("file information is not supported \n");
        CLEAN_RETURN(1);
#endif
    }

    /* Check if benchmark is selected */
    if (operation==zom_bench) {
#ifndef ZSTD_NOBENCH
        BMK_setNotificationLevel(g_displayLevel);
        BMK_setSeparateFiles(separateFiles);
        BMK_setBlockSize(blockSize);
        BMK_setNbThreads(nbThreads);
        BMK_setRealTime(setRealTimePrio);
        BMK_setNbSeconds(bench_nbSeconds);
        BMK_setLdmFlag(ldmFlag);
        BMK_setLdmMinMatch(g_ldmMinMatch);
        BMK_setLdmHashLog(g_ldmHashLog);
        if (g_ldmBucketSizeLog != LDM_PARAM_DEFAULT) {
            BMK_setLdmBucketSizeLog(g_ldmBucketSizeLog);
        }
        if (g_ldmHashEveryLog != LDM_PARAM_DEFAULT) {
            BMK_setLdmHashEveryLog(g_ldmHashEveryLog);
        }
        BMK_benchFiles(filenameTable, filenameIdx, dictFileName, cLevel, cLevelLast, &compressionParams);
#else
        (void)bench_nbSeconds; (void)blockSize; (void)setRealTimePrio; (void)separateFiles;
#endif
        goto _end;
    }

    /* Check if dictionary builder is selected */
    if (operation==zom_train) {
#ifndef ZSTD_NODICT
        ZDICT_params_t zParams;
        zParams.compressionLevel = dictCLevel;
        zParams.notificationLevel = g_displayLevel;
        zParams.dictID = dictID;
        if (cover) {
            int const optimize = !coverParams.k || !coverParams.d;
            coverParams.nbThreads = nbThreads;
            coverParams.zParams = zParams;
            operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenameTable, filenameIdx, blockSize, NULL, &coverParams, optimize);
        } else {
            ZDICT_legacy_params_t dictParams;
            memset(&dictParams, 0, sizeof(dictParams));
            dictParams.selectivityLevel = dictSelect;
            dictParams.zParams = zParams;
            operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenameTable, filenameIdx, blockSize, &dictParams, NULL, 0);
        }
#endif
        goto _end;
    }

#ifndef ZSTD_NODECOMPRESS
    if (operation==zom_test) { outFileName=nulmark; FIO_setRemoveSrcFile(0); } /* test mode */
#endif

    /* No input filename ==> use stdin and stdout */
    filenameIdx += !filenameIdx;   /* filenameTable[0] is stdin by default */
    if (!strcmp(filenameTable[0], stdinmark) && !outFileName) outFileName = stdoutmark;   /* when input is stdin, default output is stdout */

    /* Check if input/output defined as console; trigger an error in this case */
    if (!strcmp(filenameTable[0], stdinmark) && IS_CONSOLE(stdin) ) CLEAN_RETURN(badusage(programName));
    if (outFileName && !strcmp(outFileName, stdoutmark) && IS_CONSOLE(stdout) && !strcmp(filenameTable[0], stdinmark) && !forceStdout && operation!=zom_decompress)
        CLEAN_RETURN(badusage(programName));

#ifndef ZSTD_NOCOMPRESS
    /* check compression level limits */
    {   int const maxCLevel = ultra ? ZSTD_maxCLevel() : ZSTDCLI_CLEVEL_MAX;
        if (cLevel > maxCLevel) {
            DISPLAYLEVEL(2, "Warning : compression level higher than max, reduced to %i \n", maxCLevel);
            cLevel = maxCLevel;
    }   }
#endif

    /* No status message in pipe mode (stdin - stdout) or multi-files mode */
    if (!strcmp(filenameTable[0], stdinmark) && outFileName && !strcmp(outFileName,stdoutmark) && (g_displayLevel==2)) g_displayLevel=1;
    if ((filenameIdx>1) & (g_displayLevel==2)) g_displayLevel=1;

    /* IO Stream/File */
    FIO_setNotificationLevel(g_displayLevel);
    if (operation==zom_compress) {
#ifndef ZSTD_NOCOMPRESS
        FIO_setNbThreads(nbThreads);
        FIO_setBlockSize((U32)blockSize);
        FIO_setLdmFlag(ldmFlag);
        FIO_setLdmHashLog(g_ldmHashLog);
        FIO_setLdmMinMatch(g_ldmMinMatch);
        if (g_ldmBucketSizeLog != LDM_PARAM_DEFAULT) {
            FIO_setLdmBucketSizeLog(g_ldmBucketSizeLog);
        }
        if (g_ldmHashEveryLog != LDM_PARAM_DEFAULT) {
            FIO_setLdmHashEveryLog(g_ldmHashEveryLog);
        }

        if (g_overlapLog!=OVERLAP_LOG_DEFAULT) FIO_setOverlapLog(g_overlapLog);
        if ((filenameIdx==1) && outFileName)
          operationResult = FIO_compressFilename(outFileName, filenameTable[0], dictFileName, cLevel, &compressionParams);
        else
          operationResult = FIO_compressMultipleFilenames(filenameTable, filenameIdx, outFileName, suffix, dictFileName, cLevel, &compressionParams);
#else
        (void)suffix;
        DISPLAY("Compression not supported\n");
#endif
    } else {  /* decompression or test */
#ifndef ZSTD_NODECOMPRESS
        if (memLimit == 0) {
            if (compressionParams.windowLog == 0)
                memLimit = (U32)1 << g_defaultMaxWindowLog;
            else {
                memLimit = (U32)1 << (compressionParams.windowLog & 31);
            }
        }
        FIO_setMemLimit(memLimit);
        if (filenameIdx==1 && outFileName)
            operationResult = FIO_decompressFilename(outFileName, filenameTable[0], dictFileName);
        else
            operationResult = FIO_decompressMultipleFilenames(filenameTable, filenameIdx, outFileName, dictFileName);
#else
        DISPLAY("Decompression not supported\n");
#endif
    }

_end:
    if (main_pause) waitEnter();
#ifdef UTIL_HAS_CREATEFILELIST
    if (extendedFileList)
        UTIL_freeFileList(extendedFileList, fileNamesBuf);
    else
#endif
        free((void*)filenameTable);
    return operationResult;
}
예제 #2
0
int main(int argc, const char** argv)
{
    int i,
        cLevel=1,
        cLevelLast=-10000,
        legacy_format=0,
        forceStdout=0,
        main_pause=0,
        multiple_inputs=0,
        all_arguments_are_files=0,
        operationResult=0;
    operationMode_e mode = om_auto;
    const char* input_filename = NULL;
    const char* output_filename= NULL;
    const char* dictionary_filename = NULL;
    char* dynNameSpace = NULL;
    const char** inFileNames = (const char**) calloc(argc, sizeof(char*));
    unsigned ifnIdx=0;
    const char nullOutput[] = NULL_OUTPUT;
    const char extension[] = LZ4_EXTENSION;
    size_t blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT);
    const char* const exeName = lastNameFromPath(argv[0]);
#ifdef UTIL_HAS_CREATEFILELIST
    const char** extendedFileList = NULL;
    char* fileNamesBuf = NULL;
    unsigned fileNamesNb, recursive=0;
#endif

    /* Init */
    if (inFileNames==NULL) {
        DISPLAY("Allocation error : not enough memory \n");
        return 1;
    }
    inFileNames[0] = stdinmark;
    LZ4IO_setOverwrite(0);

    /* predefined behaviors, based on binary/link name */
    if (exeNameMatch(exeName, LZ4CAT)) {
        mode = om_decompress;
        LZ4IO_setOverwrite(1);
        LZ4IO_setRemoveSrcFile(0);
        forceStdout=1;
        output_filename=stdoutmark;
        displayLevel=1;
        multiple_inputs=1;
    }
    if (exeNameMatch(exeName, UNLZ4)) { mode = om_decompress; }
    if (exeNameMatch(exeName, LZ4_LEGACY)) { g_lz4c_legacy_commands=1; }

    /* command switches */
    for(i=1; i<argc; i++) {
        const char* argument = argv[i];

        if(!argument) continue;   /* Protection if argument empty */

        /* Short commands (note : aggregated short commands are allowed) */
        if (!all_arguments_are_files && argument[0]=='-') {
            /* '-' means stdin/stdout */
            if (argument[1]==0) {
                if (!input_filename) input_filename=stdinmark;
                else output_filename=stdoutmark;
                continue;
            }

            /* long commands (--long-word) */
            if (argument[1]=='-') {
                if (!strcmp(argument,  "--")) { all_arguments_are_files = 1; continue; }
                if (!strcmp(argument,  "--compress")) { mode = om_compress; continue; }
                if ((!strcmp(argument, "--decompress"))
                    || (!strcmp(argument, "--uncompress"))) { mode = om_decompress; continue; }
                if (!strcmp(argument,  "--multiple")) { multiple_inputs = 1; continue; }
                if (!strcmp(argument,  "--test")) { mode = om_test; continue; }
                if (!strcmp(argument,  "--force")) { LZ4IO_setOverwrite(1); continue; }
                if (!strcmp(argument,  "--no-force")) { LZ4IO_setOverwrite(0); continue; }
                if ((!strcmp(argument, "--stdout"))
                    || (!strcmp(argument, "--to-stdout"))) { forceStdout=1; output_filename=stdoutmark; continue; }
                if (!strcmp(argument,  "--frame-crc")) { LZ4IO_setStreamChecksumMode(1); continue; }
                if (!strcmp(argument,  "--no-frame-crc")) { LZ4IO_setStreamChecksumMode(0); continue; }
                if (!strcmp(argument,  "--content-size")) { LZ4IO_setContentSize(1); continue; }
                if (!strcmp(argument,  "--no-content-size")) { LZ4IO_setContentSize(0); continue; }
                if (!strcmp(argument,  "--sparse")) { LZ4IO_setSparseFile(2); continue; }
                if (!strcmp(argument,  "--no-sparse")) { LZ4IO_setSparseFile(0); continue; }
                if (!strcmp(argument,  "--favor-decSpeed")) { LZ4IO_favorDecSpeed(1); continue; }
                if (!strcmp(argument,  "--verbose")) { displayLevel++; continue; }
                if (!strcmp(argument,  "--quiet")) { if (displayLevel) displayLevel--; continue; }
                if (!strcmp(argument,  "--version")) { DISPLAY(WELCOME_MESSAGE); return 0; }
                if (!strcmp(argument,  "--help")) { usage_advanced(exeName); goto _cleanup; }
                if (!strcmp(argument,  "--keep")) { LZ4IO_setRemoveSrcFile(0); continue; }   /* keep source file (default) */
                if (!strcmp(argument,  "--rm")) { LZ4IO_setRemoveSrcFile(1); continue; }
                if (longCommandWArg(&argument, "--fast")) {
                        /* Parse optional acceleration factor */
                        if (*argument == '=') {
                            U32 fastLevel;
                            ++argument;
                            fastLevel = readU32FromChar(&argument);
                            if (fastLevel) {
                              cLevel = -(int)fastLevel;
                            } else {
                              badusage(exeName);
                            }
                        } else if (*argument != 0) {
                            /* Invalid character following --fast */
                            badusage(exeName);
                        } else {
                            cLevel = -1;  /* default for --fast */
                        }
                        continue;
                    }
            }

            while (argument[1]!=0) {
                argument ++;

                if (g_lz4c_legacy_commands) {
                    /* Legacy commands (-c0, -c1, -hc, -y) */
                    if (!strcmp(argument,  "c0")) { cLevel=0; argument++; continue; }  /* -c0 (fast compression) */
                    if (!strcmp(argument,  "c1")) { cLevel=9; argument++; continue; }  /* -c1 (high compression) */
                    if (!strcmp(argument,  "c2")) { cLevel=12; argument++; continue; } /* -c2 (very high compression) */
                    if (!strcmp(argument,  "hc")) { cLevel=12; argument++; continue; } /* -hc (very high compression) */
                    if (!strcmp(argument,  "y"))  { LZ4IO_setOverwrite(1); continue; } /* -y (answer 'yes' to overwrite permission) */
                }

                if ((*argument>='0') && (*argument<='9')) {
                    cLevel = readU32FromChar(&argument);
                    argument--;
                    continue;
                }


                switch(argument[0])
                {
                    /* Display help */
                case 'V': DISPLAY(WELCOME_MESSAGE); goto _cleanup;   /* Version */
                case 'h': usage_advanced(exeName); goto _cleanup;
                case 'H': usage_longhelp(exeName); goto _cleanup;

                case 'e':
                    argument++;
                    cLevelLast = readU32FromChar(&argument);
                    argument--;
                    break;

                    /* Compression (default) */
                case 'z': mode = om_compress; break;

                case 'D':
                    if (argument[1] == '\0') {
                        /* path is next arg */
                        if (i + 1 == argc) {
                            /* there is no next arg */
                            badusage(exeName);
                        }
                        dictionary_filename = argv[++i];
                    } else {
                        /* path follows immediately */
                        dictionary_filename = argument + 1;
                    }
                    /* skip to end of argument so that we jump to parsing next argument */
                    argument += strlen(argument) - 1;
                    break;

                    /* Use Legacy format (ex : Linux kernel compression) */
                case 'l': legacy_format = 1; blockSize = 8 MB; break;

                    /* Decoding */
                case 'd': mode = om_decompress; break;

                    /* Force stdout, even if stdout==console */
                case 'c': forceStdout=1; output_filename=stdoutmark; break;

                    /* Test integrity */
                case 't': mode = om_test; break;

                    /* Overwrite */
                case 'f': LZ4IO_setOverwrite(1); break;

                    /* Verbose mode */
                case 'v': displayLevel++; break;

                    /* Quiet mode */
                case 'q': if (displayLevel) displayLevel--; break;

                    /* keep source file (default anyway, so useless) (for xz/lzma compatibility) */
                case 'k': LZ4IO_setRemoveSrcFile(0); break;

                    /* Modify Block Properties */
                case 'B':
                    while (argument[1]!=0) {
                        int exitBlockProperties=0;
                        switch(argument[1])
                        {
                        case 'D': LZ4IO_setBlockMode(LZ4IO_blockLinked); argument++; break;
                        case 'X': LZ4IO_setBlockChecksumMode(1); argument ++; break;   /* disabled by default */
                        default :
                            if (argument[1] < '0' || argument[1] > '9') {
                                exitBlockProperties=1;
                                break;
                            } else {
                                unsigned B;
                                argument++;
                                B = readU32FromChar(&argument);
                                argument--;
                                if (B < 4) badusage(exeName);
                                if (B <= 7) {
                                    blockSize = LZ4IO_setBlockSizeID(B);
                                    BMK_setBlockSize(blockSize);
                                    DISPLAYLEVEL(2, "using blocks of size %u KB \n", (U32)(blockSize>>10));
                                } else {
                                    if (B < 32) badusage(exeName);
                                    BMK_setBlockSize(B);
                                    if (B >= 1024) {
                                        DISPLAYLEVEL(2, "bench: using blocks of size %u KB \n", (U32)(B>>10));
                                    } else {
                                        DISPLAYLEVEL(2, "bench: using blocks of size %u bytes \n", (U32)(B));
                                    }
                                }
                                break;
                            }
                        }
                        if (exitBlockProperties) break;
                    }
                    break;

                    /* Benchmark */
                case 'b': mode = om_bench; multiple_inputs=1;
                    break;

                    /* hidden command : benchmark files, but do not fuse result */
                case 'S': BMK_setBenchSeparately(1);
                    break;

#ifdef UTIL_HAS_CREATEFILELIST
                    /* recursive */
                case 'r': recursive=1;
#endif
                    /* fall-through */
                    /* Treat non-option args as input files.  See https://code.google.com/p/lz4/issues/detail?id=151 */
                case 'm': multiple_inputs=1;
                    break;

                    /* Modify Nb Seconds (benchmark only) */
                case 'i':
                    {   unsigned iters;
                        argument++;
                        iters = readU32FromChar(&argument);
                        argument--;
                        BMK_setNotificationLevel(displayLevel);
                        BMK_setNbSeconds(iters);   /* notification if displayLevel >= 3 */
                    }
                    break;

                    /* Pause at the end (hidden option) */
                case 'p': main_pause=1; break;

                    /* Unrecognised command */
                default : badusage(exeName);
                }