Index: head/sys/contrib/zstd/programs/zstdcli.c
===================================================================
--- head/sys/contrib/zstd/programs/zstdcli.c	(revision 325929)
+++ head/sys/contrib/zstd/programs/zstdcli.c	(revision 325930)
@@ -1,880 +1,880 @@
 /*
  * Copyright (c) 2016-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.
  */
 
 
 /*-************************************
 *  Tuning parameters
 **************************************/
 #ifndef ZSTDCLI_CLEVEL_DEFAULT
 #  define ZSTDCLI_CLEVEL_DEFAULT 3
 #endif
 
 #ifndef ZSTDCLI_CLEVEL_MAX
 #  define ZSTDCLI_CLEVEL_MAX 19   /* without using --ultra */
 #endif
 
 
 
 /*-************************************
 *  Dependencies
 **************************************/
 #include "platform.h" /* IS_CONSOLE, PLATFORM_POSIX_VERSION */
 #include "util.h"     /* UTIL_HAS_CREATEFILELIST, UTIL_createFileList */
 #include <stdio.h>    /* fprintf(), stdin, stdout, stderr */
 #include <string.h>   /* strcmp, strlen */
 #include <errno.h>    /* errno */
 #include "fileio.h"   /* stdinmark, stdoutmark, ZSTD_EXTENSION */
 #ifndef ZSTD_NOBENCH
 #  include "bench.h"  /* BMK_benchFiles, BMK_SetNbSeconds */
 #endif
 #ifndef ZSTD_NODICT
 #  include "dibio.h"  /* ZDICT_cover_params_t, DiB_trainFromFiles() */
 #endif
 #define ZSTD_STATIC_LINKING_ONLY   /* ZSTD_maxCLevel */
 #include "zstd.h"     /* ZSTD_VERSION_STRING */
 
 
 /*-************************************
 *  Constants
 **************************************/
 #define COMPRESSOR_NAME "zstd command line interface"
 #ifndef ZSTD_VERSION
 #  define ZSTD_VERSION "v" ZSTD_VERSION_STRING
 #endif
 #define AUTHOR "Yann Collet"
 #define WELCOME_MESSAGE "*** %s %i-bits %s, by %s ***\n", COMPRESSOR_NAME, (int)(sizeof(size_t)*8), ZSTD_VERSION, AUTHOR
 
 #define ZSTD_ZSTDMT "zstdmt"
 #define ZSTD_UNZSTD "unzstd"
 #define ZSTD_CAT "zstdcat"
 #define ZSTD_GZ "gzip"
 #define ZSTD_GUNZIP "gunzip"
 #define ZSTD_GZCAT "gzcat"
 #define ZSTD_LZMA "lzma"
 #define ZSTD_UNLZMA "unlzma"
 #define ZSTD_XZ "xz"
 #define ZSTD_UNXZ "unxz"
 #define ZSTD_LZ4 "lz4"
 #define ZSTD_UNLZ4 "unlz4"
 
 #define KB *(1 <<10)
 #define MB *(1 <<20)
 #define GB *(1U<<30)
 
 #define DISPLAY_LEVEL_DEFAULT 1
 
 static const char*    g_defaultDictName = "dictionary";
 static const unsigned g_defaultMaxDictSize = 110 KB;
 static const int      g_defaultDictCLevel = 3;
 static const unsigned g_defaultSelectivityLevel = 9;
 static const unsigned g_defaultMaxWindowLog = 27;
 #define OVERLAP_LOG_DEFAULT 9999
 #define LDM_PARAM_DEFAULT 9999  /* Default for parameters where 0 is valid */
 static U32 g_overlapLog = OVERLAP_LOG_DEFAULT;
 static U32 g_ldmHashLog = 0;
 static U32 g_ldmMinMatch = 0;
 static U32 g_ldmHashEveryLog = LDM_PARAM_DEFAULT;
 static U32 g_ldmBucketSizeLog = LDM_PARAM_DEFAULT;
 
 
 /*-************************************
 *  Display Macros
 **************************************/
 #define DISPLAY(...)         fprintf(g_displayOut, __VA_ARGS__)
 #define DISPLAYLEVEL(l, ...) { if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); } }
 static int g_displayLevel = DISPLAY_LEVEL_DEFAULT;   /* 0 : no display,  1: errors,  2 : + result + interaction + warnings,  3 : + progression,  4 : + information */
 static FILE* g_displayOut;
 
 
 /*-************************************
 *  Command Line
 **************************************/
 static int usage(const char* programName)
 {
     DISPLAY( "Usage : \n");
     DISPLAY( "      %s [args] [FILE(s)] [-o file] \n", programName);
     DISPLAY( "\n");
     DISPLAY( "FILE    : a filename \n");
     DISPLAY( "          with no FILE, or when FILE is - , read standard input\n");
     DISPLAY( "Arguments : \n");
 #ifndef ZSTD_NOCOMPRESS
     DISPLAY( " -#     : # compression level (1-%d, default:%d) \n", ZSTDCLI_CLEVEL_MAX, ZSTDCLI_CLEVEL_DEFAULT);
 #endif
 #ifndef ZSTD_NODECOMPRESS
     DISPLAY( " -d     : decompression \n");
 #endif
     DISPLAY( " -D file: use `file` as Dictionary \n");
     DISPLAY( " -o file: result stored into `file` (only if 1 input file) \n");
     DISPLAY( " -f     : overwrite output without prompting and (de)compress links \n");
     DISPLAY( "--rm    : remove source file(s) after successful de/compression \n");
     DISPLAY( " -k     : preserve source file(s) (default) \n");
     DISPLAY( " -h/-H  : display help/long help and exit \n");
     return 0;
 }
 
 static int usage_advanced(const char* programName)
 {
     DISPLAY(WELCOME_MESSAGE);
     usage(programName);
     DISPLAY( "\n");
     DISPLAY( "Advanced arguments : \n");
     DISPLAY( " -V     : display Version number and exit \n");
     DISPLAY( " -v     : verbose mode; specify multiple times to increase verbosity\n");
     DISPLAY( " -q     : suppress warnings; specify twice to suppress errors too\n");
     DISPLAY( " -c     : force write to standard output, even if it is the console\n");
     DISPLAY( " -l     : print information about zstd compressed files \n");
 #ifndef ZSTD_NOCOMPRESS
     DISPLAY( "--ultra : enable levels beyond %i, up to %i (requires more memory)\n", ZSTDCLI_CLEVEL_MAX, ZSTD_maxCLevel());
     DISPLAY( "--long[=#]  : enable long distance matching with given window log (default : %u)\n", g_defaultMaxWindowLog);
 #ifdef ZSTD_MULTITHREAD
     DISPLAY( " -T#    : use # threads for compression (default:1) \n");
     DISPLAY( " -B#    : select size of each job (default:0==automatic) \n");
 #endif
     DISPLAY( "--no-dictID : don't write dictID into header (dictionary compression)\n");
     DISPLAY( "--[no-]check : integrity check (default:enabled) \n");
 #endif
 #ifdef UTIL_HAS_CREATEFILELIST
     DISPLAY( " -r     : operate recursively on directories \n");
 #endif
 #ifdef ZSTD_GZCOMPRESS
     DISPLAY( "--format=gzip : compress files to the .gz format \n");
 #endif
 #ifdef ZSTD_LZMACOMPRESS
     DISPLAY( "--format=xz : compress files to the .xz format \n");
     DISPLAY( "--format=lzma : compress files to the .lzma format \n");
 #endif
 #ifdef ZSTD_LZ4COMPRESS
     DISPLAY( "--format=lz4 : compress files to the .lz4 format \n");
 #endif
 #ifndef ZSTD_NODECOMPRESS
     DISPLAY( "--test  : test compressed file integrity \n");
 #if ZSTD_SPARSE_DEFAULT
     DISPLAY( "--[no-]sparse : sparse mode (default:enabled on file, disabled on stdout)\n");
 #else
     DISPLAY( "--[no-]sparse : sparse mode (default:disabled)\n");
 #endif
 #endif
     DISPLAY( " -M#    : Set a memory usage limit for decompression \n");
     DISPLAY( "--      : All arguments after \"--\" are treated as files \n");
 #ifndef ZSTD_NODICT
     DISPLAY( "\n");
     DISPLAY( "Dictionary builder : \n");
     DISPLAY( "--train ## : create a dictionary from a training set of files \n");
     DISPLAY( "--train-cover[=k=#,d=#,steps=#] : use the cover algorithm with optional args\n");
     DISPLAY( "--train-legacy[=s=#] : use the legacy algorithm with selectivity (default: %u)\n", g_defaultSelectivityLevel);
     DISPLAY( " -o file : `file` is dictionary name (default: %s) \n", g_defaultDictName);
     DISPLAY( "--maxdict=# : limit dictionary to specified size (default : %u) \n", g_defaultMaxDictSize);
     DISPLAY( "--dictID=# : force dictionary ID to specified value (default: random)\n");
 #endif
 #ifndef ZSTD_NOBENCH
     DISPLAY( "\n");
     DISPLAY( "Benchmark arguments : \n");
     DISPLAY( " -b#    : benchmark file(s), using # compression level (default : 1) \n");
     DISPLAY( " -e#    : test all compression levels from -bX to # (default: 1)\n");
     DISPLAY( " -i#    : minimum evaluation time in seconds (default : 3s) \n");
     DISPLAY( " -B#    : cut file into independent blocks of size # (default: no block)\n");
     DISPLAY( "--priority=rt : set process priority to real-time \n");
 #endif
     return 0;
 }
 
 static int badusage(const char* programName)
 {
     DISPLAYLEVEL(1, "Incorrect parameters\n");
     if (g_displayLevel >= 2) usage(programName);
     return 1;
 }
 
 static void waitEnter(void)
 {
     int unused;
     DISPLAY("Press enter to continue...\n");
     unused = getchar();
     (void)unused;
 }
 
 static const char* lastNameFromPath(const char* path)
 {
     const char* name = path;
     if (strrchr(name, '/')) name = strrchr(name, '/') + 1;
     if (strrchr(name, '\\')) name = strrchr(name, '\\') + 1; /* windows */
     return name;
 }
 
 /*! exeNameMatch() :
     @return : a non-zero value if exeName matches test, excluding the extension
    */
 static int exeNameMatch(const char* exeName, const char* test)
 {
     return !strncmp(exeName, test, strlen(test)) &&
         (exeName[strlen(test)] == '\0' || exeName[strlen(test)] == '.');
 }
 
 /*! readU32FromChar() :
     @return : unsigned integer value read from input in `char` format
     allows and interprets K, KB, KiB, M, MB and MiB suffix.
     Will also modify `*stringPtr`, advancing it to position where it stopped reading.
     Note : function result can overflow if digit string > MAX_UINT */
 static unsigned readU32FromChar(const char** stringPtr)
 {
     unsigned result = 0;
     while ((**stringPtr >='0') && (**stringPtr <='9'))
         result *= 10, result += **stringPtr - '0', (*stringPtr)++ ;
     if ((**stringPtr=='K') || (**stringPtr=='M')) {
         result <<= 10;
         if (**stringPtr=='M') result <<= 10;
         (*stringPtr)++ ;
         if (**stringPtr=='i') (*stringPtr)++;
         if (**stringPtr=='B') (*stringPtr)++;
     }
     return result;
 }
 
 /** longCommandWArg() :
  *  check if *stringPtr is the same as longCommand.
  *  If yes, @return 1 and advances *stringPtr to the position which immediately follows longCommand.
  *  @return 0 and doesn't modify *stringPtr otherwise.
  */
 static unsigned longCommandWArg(const char** stringPtr, const char* longCommand)
 {
     size_t const comSize = strlen(longCommand);
     int const result = !strncmp(*stringPtr, longCommand, comSize);
     if (result) *stringPtr += comSize;
     return result;
 }
 
 
 #ifndef ZSTD_NODICT
 /**
  * parseCoverParameters() :
  * reads cover parameters from *stringPtr (e.g. "--train-cover=k=48,d=8,steps=32") into *params
  * @return 1 means that cover parameters were correct
  * @return 0 in case of malformed parameters
  */
 static unsigned parseCoverParameters(const char* stringPtr, ZDICT_cover_params_t* params)
 {
     memset(params, 0, sizeof(*params));
     for (; ;) {
         if (longCommandWArg(&stringPtr, "k=")) { params->k = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "d=")) { params->d = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "steps=")) { params->steps = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         return 0;
     }
     if (stringPtr[0] != 0) return 0;
     DISPLAYLEVEL(4, "cover: k=%u\nd=%u\nsteps=%u\n", params->k, params->d, params->steps);
     return 1;
 }
 
 /**
  * parseLegacyParameters() :
  * reads legacy dictioanry builter parameters from *stringPtr (e.g. "--train-legacy=selectivity=8") into *selectivity
  * @return 1 means that legacy dictionary builder parameters were correct
  * @return 0 in case of malformed parameters
  */
 static unsigned parseLegacyParameters(const char* stringPtr, unsigned* selectivity)
 {
     if (!longCommandWArg(&stringPtr, "s=") && !longCommandWArg(&stringPtr, "selectivity=")) { return 0; }
     *selectivity = readU32FromChar(&stringPtr);
     if (stringPtr[0] != 0) return 0;
     DISPLAYLEVEL(4, "legacy: selectivity=%u\n", *selectivity);
     return 1;
 }
 
 static ZDICT_cover_params_t defaultCoverParams(void)
 {
     ZDICT_cover_params_t params;
     memset(&params, 0, sizeof(params));
     params.d = 8;
     params.steps = 4;
     return params;
 }
 #endif
 
 
 /** parseCompressionParameters() :
  *  reads compression parameters from *stringPtr (e.g. "--zstd=wlog=23,clog=23,hlog=22,slog=6,slen=3,tlen=48,strat=6") into *params
  *  @return 1 means that compression parameters were correct
  *  @return 0 in case of malformed parameters
  */
 static unsigned parseCompressionParameters(const char* stringPtr, ZSTD_compressionParameters* params)
 {
     for ( ; ;) {
         if (longCommandWArg(&stringPtr, "windowLog=") || longCommandWArg(&stringPtr, "wlog=")) { params->windowLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "chainLog=") || longCommandWArg(&stringPtr, "clog=")) { params->chainLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "hashLog=") || longCommandWArg(&stringPtr, "hlog=")) { params->hashLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "searchLog=") || longCommandWArg(&stringPtr, "slog=")) { params->searchLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "searchLength=") || longCommandWArg(&stringPtr, "slen=")) { params->searchLength = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "targetLength=") || longCommandWArg(&stringPtr, "tlen=")) { params->targetLength = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "strategy=") || longCommandWArg(&stringPtr, "strat=")) { params->strategy = (ZSTD_strategy)(readU32FromChar(&stringPtr)); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "overlapLog=") || longCommandWArg(&stringPtr, "ovlog=")) { g_overlapLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "ldmHashLog=") || longCommandWArg(&stringPtr, "ldmhlog=")) { g_ldmHashLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "ldmSearchLength=") || longCommandWArg(&stringPtr, "ldmslen=")) { g_ldmMinMatch = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "ldmBucketSizeLog=") || longCommandWArg(&stringPtr, "ldmblog=")) { g_ldmBucketSizeLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         if (longCommandWArg(&stringPtr, "ldmHashEveryLog=") || longCommandWArg(&stringPtr, "ldmhevery=")) { g_ldmHashEveryLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
         return 0;
     }
 
     if (stringPtr[0] != 0) return 0; /* check the end of string */
     DISPLAYLEVEL(4, "windowLog=%d\nchainLog=%d\nhashLog=%d\nsearchLog=%d\n", params->windowLog, params->chainLog, params->hashLog, params->searchLog);
     DISPLAYLEVEL(4, "searchLength=%d\ntargetLength=%d\nstrategy=%d\n", params->searchLength, params->targetLength, params->strategy);
     return 1;
 }
 
 static void printVersion(void)
 {
     DISPLAY(WELCOME_MESSAGE);
     /* format support */
     DISPLAYLEVEL(3, "*** supports: zstd");
 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>0) && (ZSTD_LEGACY_SUPPORT<8)
     DISPLAYLEVEL(3, ", zstd legacy v0.%d+", ZSTD_LEGACY_SUPPORT);
 #endif
 #ifdef ZSTD_GZCOMPRESS
     DISPLAYLEVEL(3, ", gzip");
 #endif
 #ifdef ZSTD_LZ4COMPRESS
     DISPLAYLEVEL(3, ", lz4");
 #endif
 #ifdef ZSTD_LZMACOMPRESS
     DISPLAYLEVEL(3, ", lzma, xz ");
 #endif
     DISPLAYLEVEL(3, "\n");
     /* posix support */
 #ifdef _POSIX_C_SOURCE
     DISPLAYLEVEL(4, "_POSIX_C_SOURCE defined: %ldL\n", (long) _POSIX_C_SOURCE);
 #endif
 #ifdef _POSIX_VERSION
     DISPLAYLEVEL(4, "_POSIX_VERSION defined: %ldL \n", (long) _POSIX_VERSION);
 #endif
 #ifdef PLATFORM_POSIX_VERSION
     DISPLAYLEVEL(4, "PLATFORM_POSIX_VERSION defined: %ldL\n", (long) PLATFORM_POSIX_VERSION);
 #endif
 }
 
 typedef enum { zom_compress, zom_decompress, zom_test, zom_bench, zom_train, zom_list } zstd_operation_mode;
 
 #define CLEAN_RETURN(i) { operationResult = (i); goto _end; }
 
 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,
         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; g_removeSrcFile=0; }
+    if (exeNameMatch(programName, ZSTD_CAT)) { operation=zom_decompress; forceStdout=1; FIO_overwriteMode(); outFileName=stdoutmark; g_displayLevel=1; FIO_setRemoveSrcFile(0); }
     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;
 
 #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_setBlockSize(blockSize);
         BMK_setNbThreads(nbThreads);
         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, setRealTimePrio);
 #endif
         (void)bench_nbSeconds; (void)blockSize; (void)setRealTimePrio;
         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));
 
     /* user-selected output filename, only possible with a single file */
     if (outFileName && strcmp(outFileName,stdoutmark) && strcmp(outFileName,nulmark) && (filenameIdx>1)) {
         DISPLAY("Too many files (%u) on the command line. \n", filenameIdx);
         CLEAN_RETURN(filenameIdx);
     }
 
 #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 ? 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 ? outFileName : ZSTD_EXTENSION, 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;
 }