FreeBSD/Linux Kernel Cross Reference
sys/contrib/zstd/programs/zstdcli.c

     /*
      * Copyright (c) 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
    
    #ifndef ZSTDCLI_NBTHREADS_DEFAULT
    #  define ZSTDCLI_NBTHREADS_DEFAULT 1
    #endif
    
    /*-************************************
    *  Dependencies
    **************************************/
    #include "platform.h" /* IS_CONSOLE, PLATFORM_POSIX_VERSION */
    #include "util.h"     /* UTIL_HAS_CREATEFILELIST, UTIL_createFileList */
    #include <stdlib.h>   /* getenv */
    #include <string.h>   /* strcmp, strlen */
    #include <stdio.h>    /* fprintf(), stdin, stdout, stderr */
    #include <errno.h>    /* errno */
    #include <assert.h>   /* assert */
    
    #include "fileio.h"   /* stdinmark, stdoutmark, ZSTD_EXTENSION */
    #ifndef ZSTD_NOBENCH
    #  include "benchzstd.h"  /* BMK_benchFiles */
    #endif
    #ifndef ZSTD_NODICT
    #  include "dibio.h"  /* ZDICT_cover_params_t, DiB_trainFromFiles() */
    #endif
    #ifndef ZSTD_NOTRACE
    #  include "zstdcli_trace.h"
    #endif
    #include "../lib/zstd.h"  /* ZSTD_VERSION_STRING, ZSTD_minCLevel, ZSTD_maxCLevel */
    
    
    /*-************************************
    *  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_ZCAT "zcat"
    #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 2
    
    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_ldmHashRateLog = LDM_PARAM_DEFAULT;
    static U32 g_ldmBucketSizeLog = LDM_PARAM_DEFAULT;
    
    
    #define DEFAULT_ACCEL 1
    
    typedef enum { cover, fastCover, legacy } dictType;
    
    /*-************************************
   *  Display Macros
   **************************************/
   #define DISPLAY_F(f, ...)    fprintf((f), __VA_ARGS__)
   #define DISPLAYOUT(...)      DISPLAY_F(stdout, __VA_ARGS__)
   #define DISPLAY(...)         DISPLAY_F(stderr, __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 */
   
   
   /*-************************************
   *  Check Version (when CLI linked to dynamic library)
   **************************************/
   
   /* Due to usage of experimental symbols and capabilities by the CLI,
    * the CLI must be linked against a dynamic library of same version */
   static void checkLibVersion(void)
   {
       if (strcmp(ZSTD_VERSION_STRING, ZSTD_versionString())) {
           DISPLAYLEVEL(1, "Error : incorrect library version (expecting : %s ; actual : %s ) \n",
                       ZSTD_VERSION_STRING, ZSTD_versionString());
           DISPLAYLEVEL(1, "Please update library to version %s, or use stand-alone zstd binary \n",
                       ZSTD_VERSION_STRING);
           exit(1);
       }
   }
   
   
   /*-************************************
   *  Command Line
   **************************************/
   /* print help either in `stderr` or `stdout` depending on originating request
    * error (badusage) => stderr
    * help (usage_advanced) => stdout
    */
   static void usage(FILE* f, const char* programName)
   {
       DISPLAY_F(f, "Usage : \n");
       DISPLAY_F(f, "      %s [args] [FILE(s)] [-o file] \n", programName);
       DISPLAY_F(f, "\n");
       DISPLAY_F(f, "FILE    : a filename \n");
       DISPLAY_F(f, "          with no FILE, or when FILE is - , read standard input\n");
       DISPLAY_F(f, "Arguments : \n");
   #ifndef ZSTD_NOCOMPRESS
       DISPLAY_F(f, " -#     : # compression level (1-%d, default: %d) \n", ZSTDCLI_CLEVEL_MAX, ZSTDCLI_CLEVEL_DEFAULT);
   #endif
   #ifndef ZSTD_NODECOMPRESS
       DISPLAY_F(f, " -d     : decompression \n");
   #endif
       DISPLAY_F(f, " -D DICT: use DICT as Dictionary for compression or decompression \n");
       DISPLAY_F(f, " -o file: result stored into `file` (only 1 output file) \n");
       DISPLAY_F(f, " -f     : disable input and output checks. Allows overwriting existing files,\n");
       DISPLAY_F(f, "          input from console, output to stdout, operating on links,\n");
       DISPLAY_F(f, "          block devices, etc.\n");
       DISPLAY_F(f, "--rm    : remove source file(s) after successful de/compression \n");
       DISPLAY_F(f, " -k     : preserve source file(s) (default) \n");
       DISPLAY_F(f, " -h/-H  : display help/long help and exit \n");
   }
   
   static void usage_advanced(const char* programName)
   {
       DISPLAYOUT(WELCOME_MESSAGE);
       usage(stdout, programName);
       DISPLAYOUT( "\n");
       DISPLAYOUT( "Advanced arguments : \n");
       DISPLAYOUT( " -V     : display Version number and exit \n");
   
       DISPLAYOUT( " -c     : write to standard output (even if it is the console) \n");
   
       DISPLAYOUT( " -v     : verbose mode; specify multiple times to increase verbosity \n");
       DISPLAYOUT( " -q     : suppress warnings; specify twice to suppress errors too \n");
       DISPLAYOUT( "--[no-]progress : forcibly display, or never display the progress counter.\n");
       DISPLAYOUT( "                  note: any (de)compressed output to terminal will mix with progress counter text. \n");
   
   #ifdef UTIL_HAS_CREATEFILELIST
       DISPLAYOUT( " -r     : operate recursively on directories \n");
       DISPLAYOUT( "--filelist FILE : read list of files to operate upon from FILE \n");
       DISPLAYOUT( "--output-dir-flat DIR : processed files are stored into DIR \n");
   #endif
   
   #ifdef UTIL_HAS_MIRRORFILELIST
       DISPLAYOUT( "--output-dir-mirror DIR : processed files are stored into DIR respecting original directory structure \n");
   #endif
   
   
   #ifndef ZSTD_NOCOMPRESS
       DISPLAYOUT( "--[no-]check : during compression, add XXH64 integrity checksum to frame (default: enabled)");
   #ifndef ZSTD_NODECOMPRESS
       DISPLAYOUT( ". If specified with -d, decompressor will ignore/validate checksums in compressed frame (default: validate).");
   #endif
   #else
   #ifdef ZSTD_NOCOMPRESS
       DISPLAYOUT( "--[no-]check : during decompression, ignore/validate checksums in compressed frame (default: validate).");
   #endif
   #endif /* ZSTD_NOCOMPRESS */
   
   #ifndef ZSTD_NOTRACE
       DISPLAYOUT( "\n");
       DISPLAYOUT( "--trace FILE : log tracing information to FILE.");
   #endif
       DISPLAYOUT( "\n");
   
       DISPLAYOUT( "--      : All arguments after \"--\" are treated as files \n");
   
   #ifndef ZSTD_NOCOMPRESS
       DISPLAYOUT( "\n");
       DISPLAYOUT( "Advanced compression arguments : \n");
       DISPLAYOUT( "--ultra : enable levels beyond %i, up to %i (requires more memory) \n", ZSTDCLI_CLEVEL_MAX, ZSTD_maxCLevel());
       DISPLAYOUT( "--long[=#]: enable long distance matching with given window log (default: %u) \n", g_defaultMaxWindowLog);
       DISPLAYOUT( "--fast[=#]: switch to very fast compression levels (default: %u) \n", 1);
       DISPLAYOUT( "--adapt : dynamically adapt compression level to I/O conditions \n");
       DISPLAYOUT( "--[no-]row-match-finder : force enable/disable usage of fast row-based matchfinder for greedy, lazy, and lazy2 strategies \n");
       DISPLAYOUT( "--patch-from=FILE : specify the file to be used as a reference point for zstd's diff engine. \n");
   # ifdef ZSTD_MULTITHREAD
       DISPLAYOUT( " -T#    : spawns # compression threads (default: 1, 0==# cores) \n");
       DISPLAYOUT( " -B#    : select size of each job (default: 0==automatic) \n");
       DISPLAYOUT( "--single-thread : use a single thread for both I/O and compression (result slightly different than -T1) \n");
       DISPLAYOUT( "--auto-threads={physical,logical} (default: physical} : use either physical cores or logical cores as default when specifying -T0 \n");
       DISPLAYOUT( "--rsyncable : compress using a rsync-friendly method (-B sets block size) \n");
   # endif
       DISPLAYOUT( "--exclude-compressed: only compress files that are not already compressed \n");
       DISPLAYOUT( "--stream-size=# : specify size of streaming input from `stdin` \n");
       DISPLAYOUT( "--size-hint=# optimize compression parameters for streaming input of approximately this size \n");
       DISPLAYOUT( "--target-compressed-block-size=# : generate compressed block of approximately targeted size \n");
       DISPLAYOUT( "--no-dictID : don't write dictID into header (dictionary compression only) \n");
       DISPLAYOUT( "--[no-]compress-literals : force (un)compressed literals \n");
   
       DISPLAYOUT( "--format=zstd : compress files to the .zst format (default) \n");
   #ifdef ZSTD_GZCOMPRESS
       DISPLAYOUT( "--format=gzip : compress files to the .gz format \n");
   #endif
   #ifdef ZSTD_LZMACOMPRESS
       DISPLAYOUT( "--format=xz : compress files to the .xz format \n");
       DISPLAYOUT( "--format=lzma : compress files to the .lzma format \n");
   #endif
   #ifdef ZSTD_LZ4COMPRESS
       DISPLAYOUT( "--format=lz4 : compress files to the .lz4 format \n");
   #endif
   #endif  /* !ZSTD_NOCOMPRESS */
   
   #ifndef ZSTD_NODECOMPRESS
       DISPLAYOUT( "\n");
       DISPLAYOUT( "Advanced decompression arguments : \n");
       DISPLAYOUT( " -l     : print information about zstd compressed files \n");
       DISPLAYOUT( "--test  : test compressed file integrity \n");
       DISPLAYOUT( " -M#    : Set a memory usage limit for decompression \n");
   # if ZSTD_SPARSE_DEFAULT
       DISPLAYOUT( "--[no-]sparse : sparse mode (default: enabled on file, disabled on stdout) \n");
   # else
       DISPLAYOUT( "--[no-]sparse : sparse mode (default: disabled) \n");
   # endif
   #endif  /* ZSTD_NODECOMPRESS */
   
   #ifndef ZSTD_NODICT
       DISPLAYOUT( "\n");
       DISPLAYOUT( "Dictionary builder : \n");
       DISPLAYOUT( "--train ## : create a dictionary from a training set of files \n");
       DISPLAYOUT( "--train-cover[=k=#,d=#,steps=#,split=#,shrink[=#]] : use the cover algorithm with optional args \n");
       DISPLAYOUT( "--train-fastcover[=k=#,d=#,f=#,steps=#,split=#,accel=#,shrink[=#]] : use the fast cover algorithm with optional args \n");
       DISPLAYOUT( "--train-legacy[=s=#] : use the legacy algorithm with selectivity (default: %u) \n", g_defaultSelectivityLevel);
       DISPLAYOUT( " -o DICT : DICT is dictionary name (default: %s) \n", g_defaultDictName);
       DISPLAYOUT( "--maxdict=# : limit dictionary to specified size (default: %u) \n", g_defaultMaxDictSize);
       DISPLAYOUT( "--dictID=# : force dictionary ID to specified value (default: random) \n");
   #endif
   
   #ifndef ZSTD_NOBENCH
       DISPLAYOUT( "\n");
       DISPLAYOUT( "Benchmark arguments : \n");
       DISPLAYOUT( " -b#    : benchmark file(s), using # compression level (default: %d) \n", ZSTDCLI_CLEVEL_DEFAULT);
       DISPLAYOUT( " -e#    : test all compression levels successively from -b# to -e# (default: 1) \n");
       DISPLAYOUT( " -i#    : minimum evaluation time in seconds (default: 3s) \n");
       DISPLAYOUT( " -B#    : cut file into independent blocks of size # (default: no block) \n");
       DISPLAYOUT( " -S     : output one benchmark result per input file (default: consolidated result) \n");
       DISPLAYOUT( "--priority=rt : set process priority to real-time \n");
   #endif
   
   }
   
   static void badusage(const char* programName)
   {
       DISPLAYLEVEL(1, "Incorrect parameters \n");
       if (g_displayLevel >= 2) usage(stderr, programName);
   }
   
   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)] == '.');
   }
   
   static void errorOut(const char* msg)
   {
       DISPLAY("%s \n", msg); exit(1);
   }
   
   /*! readU32FromCharChecked() :
    * @return 0 if success, and store the result in *value.
    *  allows and interprets K, KB, KiB, M, MB and MiB suffix.
    *  Will also modify `*stringPtr`, advancing it to position where it stopped reading.
    * @return 1 if an overflow error occurs */
   static int readU32FromCharChecked(const char** stringPtr, unsigned* value)
   {
       unsigned result = 0;
       while ((**stringPtr >='') && (**stringPtr <='9')) {
           unsigned const max = ((unsigned)(-1)) / 10;
           unsigned last = result;
           if (result > max) return 1; /* overflow error */
           result *= 10;
           result += (unsigned)(**stringPtr - '');
           if (result < last) return 1; /* overflow error */
           (*stringPtr)++ ;
       }
       if ((**stringPtr=='K') || (**stringPtr=='M')) {
           unsigned const maxK = ((unsigned)(-1)) >> 10;
           if (result > maxK) return 1; /* overflow error */
           result <<= 10;
           if (**stringPtr=='M') {
               if (result > maxK) return 1; /* overflow error */
               result <<= 10;
           }
           (*stringPtr)++;  /* skip `K` or `M` */
           if (**stringPtr=='i') (*stringPtr)++;
           if (**stringPtr=='B') (*stringPtr)++;
       }
       *value = result;
       return 0;
   }
   
   /*! 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 will exit() program if digit sequence overflows */
   static unsigned readU32FromChar(const char** stringPtr) {
       static const char errorMsg[] = "error: numeric value overflows 32-bit unsigned int";
       unsigned result;
       if (readU32FromCharChecked(stringPtr, &result)) { errorOut(errorMsg); }
       return result;
   }
   
   /*! readIntFromChar() :
    * @return : signed 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 will exit() program if digit sequence overflows */
   static int readIntFromChar(const char** stringPtr) {
       static const char errorMsg[] = "error: numeric value overflows 32-bit int";
       int sign = 1;
       unsigned result;
       if (**stringPtr=='-') {
           (*stringPtr)++;
           sign = -1;
       }
       if (readU32FromCharChecked(stringPtr, &result)) { errorOut(errorMsg); }
       return (int) result * sign;
   }
   
   /*! readSizeTFromCharChecked() :
    * @return 0 if success, and store the result in *value.
    *  allows and interprets K, KB, KiB, M, MB and MiB suffix.
    *  Will also modify `*stringPtr`, advancing it to position where it stopped reading.
    * @return 1 if an overflow error occurs */
   static int readSizeTFromCharChecked(const char** stringPtr, size_t* value)
   {
       size_t result = 0;
       while ((**stringPtr >='') && (**stringPtr <='9')) {
           size_t const max = ((size_t)(-1)) / 10;
           size_t last = result;
           if (result > max) return 1; /* overflow error */
           result *= 10;
           result += (size_t)(**stringPtr - '');
           if (result < last) return 1; /* overflow error */
           (*stringPtr)++ ;
       }
       if ((**stringPtr=='K') || (**stringPtr=='M')) {
           size_t const maxK = ((size_t)(-1)) >> 10;
           if (result > maxK) return 1; /* overflow error */
           result <<= 10;
           if (**stringPtr=='M') {
               if (result > maxK) return 1; /* overflow error */
               result <<= 10;
           }
           (*stringPtr)++;  /* skip `K` or `M` */
           if (**stringPtr=='i') (*stringPtr)++;
           if (**stringPtr=='B') (*stringPtr)++;
       }
       *value = result;
       return 0;
   }
   
   /*! readSizeTFromChar() :
    * @return : size_t 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 will exit() program if digit sequence overflows */
   static size_t readSizeTFromChar(const char** stringPtr) {
       static const char errorMsg[] = "error: numeric value overflows size_t";
       size_t result;
       if (readSizeTFromCharChecked(stringPtr, &result)) { errorOut(errorMsg); }
       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 int 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
   
   static const unsigned kDefaultRegression = 1;
   /**
    * 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; }
           if (longCommandWArg(&stringPtr, "split=")) {
             unsigned splitPercentage = readU32FromChar(&stringPtr);
             params->splitPoint = (double)splitPercentage / 100.0;
             if (stringPtr[0]==',') { stringPtr++; continue; } else break;
           }
           if (longCommandWArg(&stringPtr, "shrink")) {
             params->shrinkDictMaxRegression = kDefaultRegression;
             params->shrinkDict = 1;
             if (stringPtr[0]=='=') {
               stringPtr++;
               params->shrinkDictMaxRegression = 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\nsplit=%u\nshrink%u\n", params->k, params->d, params->steps, (unsigned)(params->splitPoint * 100), params->shrinkDictMaxRegression);
       return 1;
   }
   
   /**
    * parseFastCoverParameters() :
    * reads fastcover parameters from *stringPtr (e.g. "--train-fastcover=k=48,d=8,f=20,steps=32,accel=2") into *params
    * @return 1 means that fastcover parameters were correct
    * @return 0 in case of malformed parameters
    */
   static unsigned parseFastCoverParameters(const char* stringPtr, ZDICT_fastCover_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, "f=")) { params->f = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "steps=")) { params->steps = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "accel=")) { params->accel = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "split=")) {
             unsigned splitPercentage = readU32FromChar(&stringPtr);
             params->splitPoint = (double)splitPercentage / 100.0;
             if (stringPtr[0]==',') { stringPtr++; continue; } else break;
           }
           if (longCommandWArg(&stringPtr, "shrink")) {
             params->shrinkDictMaxRegression = kDefaultRegression;
             params->shrinkDict = 1;
             if (stringPtr[0]=='=') {
               stringPtr++;
               params->shrinkDictMaxRegression = readU32FromChar(&stringPtr);
             }
             if (stringPtr[0]==',') {
               stringPtr++;
               continue;
             }
             else break;
           }
           return 0;
       }
       if (stringPtr[0] != 0) return 0;
       DISPLAYLEVEL(4, "cover: k=%u\nd=%u\nf=%u\nsteps=%u\nsplit=%u\naccel=%u\nshrink=%u\n", params->k, params->d, params->f, params->steps, (unsigned)(params->splitPoint * 100), params->accel, params->shrinkDictMaxRegression);
       return 1;
   }
   
   /**
    * parseLegacyParameters() :
    * reads legacy dictionary builder 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;
       params.splitPoint = 1.0;
       params.shrinkDict = 0;
       params.shrinkDictMaxRegression = kDefaultRegression;
       return params;
   }
   
   static ZDICT_fastCover_params_t defaultFastCoverParams(void)
   {
       ZDICT_fastCover_params_t params;
       memset(&params, 0, sizeof(params));
       params.d = 8;
       params.f = 20;
       params.steps = 4;
       params.splitPoint = 0.75; /* different from default splitPoint of cover */
       params.accel = DEFAULT_ACCEL;
       params.shrinkDict = 0;
       params.shrinkDictMaxRegression = kDefaultRegression;
       return params;
   }
   #endif
   
   
   /** parseAdaptParameters() :
    *  reads adapt parameters from *stringPtr (e.g. "--zstd=min=1,max=19) and store them into adaptMinPtr and adaptMaxPtr.
    *  Both adaptMinPtr and adaptMaxPtr must be already allocated and correctly initialized.
    *  There is no guarantee that any of these values will be updated.
    *  @return 1 means that parsing was successful,
    *  @return 0 in case of malformed parameters
    */
   static unsigned parseAdaptParameters(const char* stringPtr, int* adaptMinPtr, int* adaptMaxPtr)
   {
       for ( ; ;) {
           if (longCommandWArg(&stringPtr, "min=")) { *adaptMinPtr = readIntFromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "max=")) { *adaptMaxPtr = readIntFromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           DISPLAYLEVEL(4, "invalid compression parameter \n");
           return 0;
       }
       if (stringPtr[0] != 0) return 0; /* check the end of string */
       if (*adaptMinPtr > *adaptMaxPtr) {
           DISPLAYLEVEL(4, "incoherent adaptation limits \n");
           return 0;
       }
       return 1;
   }
   
   
   /** parseCompressionParameters() :
    *  reads compression parameters from *stringPtr (e.g. "--zstd=wlog=23,clog=23,hlog=22,slog=6,mml=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, "minMatch=") || longCommandWArg(&stringPtr, "mml=")) { params->minMatch = 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, "lhlog=")) { g_ldmHashLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "ldmMinMatch=") || longCommandWArg(&stringPtr, "lmml=")) { g_ldmMinMatch = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "ldmBucketSizeLog=") || longCommandWArg(&stringPtr, "lblog=")) { g_ldmBucketSizeLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           if (longCommandWArg(&stringPtr, "ldmHashRateLog=") || longCommandWArg(&stringPtr, "lhrlog=")) { g_ldmHashRateLog = readU32FromChar(&stringPtr); if (stringPtr[0]==',') { stringPtr++; continue; } else break; }
           DISPLAYLEVEL(4, "invalid compression parameter \n");
           return 0;
       }
   
       DISPLAYLEVEL(4, "windowLog=%d, chainLog=%d, hashLog=%d, searchLog=%d \n", params->windowLog, params->chainLog, params->hashLog, params->searchLog);
       DISPLAYLEVEL(4, "minMatch=%d, targetLength=%d, strategy=%d \n", params->minMatch, params->targetLength, params->strategy);
       if (stringPtr[0] != 0) return 0; /* check the end of string */
       return 1;
   }
   
   static void printVersion(void)
   {
       if (g_displayLevel < DISPLAY_LEVEL_DEFAULT) {
           DISPLAYOUT("%s\n", ZSTD_VERSION_STRING);
           return;
       }
   
       DISPLAYOUT(WELCOME_MESSAGE);
       if (g_displayLevel >= 3) {
       /* format support */
           DISPLAYOUT("*** supports: zstd");
       #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>0) && (ZSTD_LEGACY_SUPPORT<8)
           DISPLAYOUT(", zstd legacy v0.%d+", ZSTD_LEGACY_SUPPORT);
       #endif
       #ifdef ZSTD_GZCOMPRESS
           DISPLAYOUT(", gzip");
       #endif
       #ifdef ZSTD_LZ4COMPRESS
           DISPLAYOUT(", lz4");
       #endif
       #ifdef ZSTD_LZMACOMPRESS
           DISPLAYOUT(", lzma, xz ");
       #endif
           DISPLAYOUT("\n");
           if (g_displayLevel >= 4) {
               /* posix support */
           #ifdef _POSIX_C_SOURCE
               DISPLAYOUT("_POSIX_C_SOURCE defined: %ldL\n", (long) _POSIX_C_SOURCE);
           #endif
           #ifdef _POSIX_VERSION
               DISPLAYOUT("_POSIX_VERSION defined: %ldL \n", (long) _POSIX_VERSION);
           #endif
           #ifdef PLATFORM_POSIX_VERSION
               DISPLAYOUT("PLATFORM_POSIX_VERSION defined: %ldL\n", (long) PLATFORM_POSIX_VERSION);
           #endif
       }   }
   }
   
   #define ZSTD_NB_STRATEGIES 9
   static const char* ZSTD_strategyMap[ZSTD_NB_STRATEGIES + 1] = { "", "ZSTD_fast",
                   "ZSTD_dfast", "ZSTD_greedy", "ZSTD_lazy", "ZSTD_lazy2", "ZSTD_btlazy2",
                   "ZSTD_btopt", "ZSTD_btultra", "ZSTD_btultra2"};
   
   #ifndef ZSTD_NOCOMPRESS
   
   static void printDefaultCParams(const char* filename, const char* dictFileName, int cLevel) {
       unsigned long long fileSize = UTIL_getFileSize(filename);
       const size_t dictSize = dictFileName != NULL ? (size_t)UTIL_getFileSize(dictFileName) : 0;
       const ZSTD_compressionParameters cParams = ZSTD_getCParams(cLevel, fileSize, dictSize);
       if (fileSize != UTIL_FILESIZE_UNKNOWN) DISPLAY("%s (%u bytes)\n", filename, (unsigned)fileSize);
       else DISPLAY("%s (src size unknown)\n", filename);
       DISPLAY(" - windowLog     : %u\n", cParams.windowLog);
       DISPLAY(" - chainLog      : %u\n", cParams.chainLog);
       DISPLAY(" - hashLog       : %u\n", cParams.hashLog);
       DISPLAY(" - searchLog     : %u\n", cParams.searchLog);
       DISPLAY(" - minMatch      : %u\n", cParams.minMatch);
       DISPLAY(" - targetLength  : %u\n", cParams.targetLength);
       assert(cParams.strategy < ZSTD_NB_STRATEGIES + 1);
       DISPLAY(" - strategy      : %s (%u)\n", ZSTD_strategyMap[(int)cParams.strategy], (unsigned)cParams.strategy);
   }
   
   static void printActualCParams(const char* filename, const char* dictFileName, int cLevel, const ZSTD_compressionParameters* cParams) {
       unsigned long long fileSize = UTIL_getFileSize(filename);
       const size_t dictSize = dictFileName != NULL ? (size_t)UTIL_getFileSize(dictFileName) : 0;
       ZSTD_compressionParameters actualCParams = ZSTD_getCParams(cLevel, fileSize, dictSize);
       assert(g_displayLevel >= 4);
       actualCParams.windowLog = cParams->windowLog == 0 ? actualCParams.windowLog : cParams->windowLog;
       actualCParams.chainLog = cParams->chainLog == 0 ? actualCParams.chainLog : cParams->chainLog;
       actualCParams.hashLog = cParams->hashLog == 0 ? actualCParams.hashLog : cParams->hashLog;
       actualCParams.searchLog = cParams->searchLog == 0 ? actualCParams.searchLog : cParams->searchLog;
       actualCParams.minMatch = cParams->minMatch == 0 ? actualCParams.minMatch : cParams->minMatch;
       actualCParams.targetLength = cParams->targetLength == 0 ? actualCParams.targetLength : cParams->targetLength;
       actualCParams.strategy = cParams->strategy == 0 ? actualCParams.strategy : cParams->strategy;
       DISPLAY("--zstd=wlog=%d,clog=%d,hlog=%d,slog=%d,mml=%d,tlen=%d,strat=%d\n",
               actualCParams.windowLog, actualCParams.chainLog, actualCParams.hashLog, actualCParams.searchLog,
               actualCParams.minMatch, actualCParams.targetLength, actualCParams.strategy);
   }
   
   #endif
   
   /* Environment variables for parameter setting */
   #define ENV_CLEVEL "ZSTD_CLEVEL"
   #define ENV_NBTHREADS "ZSTD_NBTHREADS"    /* takes lower precedence than directly specifying -T# in the CLI */
   
   /* pick up environment variable */
   static int init_cLevel(void) {
       const char* const env = getenv(ENV_CLEVEL);
       if (env != NULL) {
           const char* ptr = env;
           int sign = 1;
           if (*ptr == '-') {
               sign = -1;
               ptr++;
           } else if (*ptr == '+') {
               ptr++;
           }
   
           if ((*ptr>='') && (*ptr<='9')) {
               unsigned absLevel;
               if (readU32FromCharChecked(&ptr, &absLevel)) {
                   DISPLAYLEVEL(2, "Ignore environment variable setting %s=%s: numeric value too large \n", ENV_CLEVEL, env);
                   return ZSTDCLI_CLEVEL_DEFAULT;
               } else if (*ptr == 0) {
                   return sign * (int)absLevel;
           }   }
   
           DISPLAYLEVEL(2, "Ignore environment variable setting %s=%s: not a valid integer value \n", ENV_CLEVEL, env);
       }
   
       return ZSTDCLI_CLEVEL_DEFAULT;
   }
   
   #ifdef ZSTD_MULTITHREAD
   static unsigned init_nbThreads(void) {
       const char* const env = getenv(ENV_NBTHREADS);
       if (env != NULL) {
           const char* ptr = env;
           if ((*ptr>='') && (*ptr<='9')) {
               unsigned nbThreads;
               if (readU32FromCharChecked(&ptr, &nbThreads)) {
                   DISPLAYLEVEL(2, "Ignore environment variable setting %s=%s: numeric value too large \n", ENV_NBTHREADS, env);
                   return ZSTDCLI_NBTHREADS_DEFAULT;
               } else if (*ptr == 0) {
                   return nbThreads;
               }
           }
           DISPLAYLEVEL(2, "Ignore environment variable setting %s=%s: not a valid unsigned value \n", ENV_NBTHREADS, env);
       }
   
       return ZSTDCLI_NBTHREADS_DEFAULT;
   }
   #endif
   
   #define NEXT_FIELD(ptr) {         \
       if (*argument == '=') {       \
           ptr = ++argument;         \
           argument += strlen(ptr);  \
       } else {                      \
           argNb++;                  \
           if (argNb >= argCount) {  \
               DISPLAY("error: missing command argument \n"); \
               CLEAN_RETURN(1);      \
           }                         \
           ptr = argv[argNb];        \
           assert(ptr != NULL);      \
           if (ptr[0]=='-') {        \
               DISPLAY("error: command cannot be separated from its argument by another command \n"); \
               CLEAN_RETURN(1);      \
   }   }   }
   
   #define NEXT_UINT32(val32) {      \
       const char* __nb;             \
       NEXT_FIELD(__nb);             \
       val32 = readU32FromChar(&__nb); \
   }
   
   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; }
   
   #ifdef ZSTD_NOCOMPRESS
   /* symbols from compression library are not defined and should not be invoked */
   # define MINCLEVEL  -99
   # define MAXCLEVEL   22
   #else
   # define MINCLEVEL  ZSTD_minCLevel()
   # define MAXCLEVEL  ZSTD_maxCLevel()
   #endif
   
   int main(int argCount, const char* argv[])
   {
       int argNb,
           followLinks = 0,
           allowBlockDevices = 0,
           forceStdin = 0,
           forceStdout = 0,
           hasStdout = 0,
           ldmFlag = 0,
           main_pause = 0,
           nbWorkers = 0,
           adapt = 0,
           useRowMatchFinder = 0,
           adaptMin = MINCLEVEL,
           adaptMax = MAXCLEVEL,
           rsyncable = 0,
           nextArgumentsAreFiles = 0,
           operationResult = 0,
           separateFiles = 0,
           setRealTimePrio = 0,
           singleThread = 0,
   #ifdef ZSTD_MULTITHREAD
           defaultLogicalCores = 0,
   #endif
           showDefaultCParams = 0,
           ultra=0,
           contentSize=1;
       double compressibility = 0.5;
       unsigned bench_nbSeconds = 3;   /* would be better if this value was synchronized from bench */
       size_t blockSize = 0;
   
       FIO_prefs_t* const prefs = FIO_createPreferences();
       FIO_ctx_t* const fCtx = FIO_createContext();
       zstd_operation_mode operation = zom_compress;
       ZSTD_compressionParameters compressionParams;
       int cLevel = init_cLevel();
       int cLevelLast = MINCLEVEL - 1;  /* lower than minimum */
       unsigned recursive = 0;
       unsigned memLimit = 0;
       FileNamesTable* filenames = UTIL_allocateFileNamesTable((size_t)argCount);  /* argCount >= 1 */
       FileNamesTable* file_of_names = UTIL_allocateFileNamesTable((size_t)argCount);  /* argCount >= 1 */
       const char* programName = argv[0];
       const char* outFileName = NULL;
       const char* outDirName = NULL;
       const char* outMirroredDirName = NULL;
       const char* dictFileName = NULL;
       const char* patchFromDictFileName = NULL;
       const char* suffix = ZSTD_EXTENSION;
       unsigned maxDictSize = g_defaultMaxDictSize;
       unsigned dictID = 0;
       size_t streamSrcSize = 0;
       size_t targetCBlockSize = 0;
       size_t srcSizeHint = 0;
       int dictCLevel = g_defaultDictCLevel;
       unsigned dictSelect = g_defaultSelectivityLevel;
   #ifndef ZSTD_NODICT
       ZDICT_cover_params_t coverParams = defaultCoverParams();
       ZDICT_fastCover_params_t fastCoverParams = defaultFastCoverParams();
       dictType dict = fastCover;
   #endif
   #ifndef ZSTD_NOBENCH
       BMK_advancedParams_t benchParams = BMK_initAdvancedParams();
   #endif
       ZSTD_paramSwitch_e literalCompressionMode = ZSTD_ps_auto;
   
   
       /* init */
       checkLibVersion();
       (void)recursive; (void)cLevelLast;    /* not used when ZSTD_NOBENCH set */
       (void)memLimit;
       assert(argCount >= 1);
       if ((filenames==NULL) || (file_of_names==NULL)) { DISPLAY("zstd: allocation error \n"); exit(1); }
       programName = lastNameFromPath(programName);
   #ifdef ZSTD_MULTITHREAD
       nbWorkers = init_nbThreads();
   #endif
   
       /* preset behaviors */
       if (exeNameMatch(programName, ZSTD_ZSTDMT)) nbWorkers=0, singleThread=0;
       if (exeNameMatch(programName, ZSTD_UNZSTD)) operation=zom_decompress;
       if (exeNameMatch(programName, ZSTD_CAT)) { operation=zom_decompress; FIO_overwriteMode(prefs); forceStdout=1; followLinks=1; outFileName=stdoutmark; g_displayLevel=1; }     /* supports multiple formats */
       if (exeNameMatch(programName, ZSTD_ZCAT)) { operation=zom_decompress; FIO_overwriteMode(prefs); forceStdout=1; followLinks=1; outFileName=stdoutmark; g_displayLevel=1; }    /* behave like zcat, also supports multiple formats */
       if (exeNameMatch(programName, ZSTD_GZ)) { suffix = GZ_EXTENSION; FIO_setCompressionType(prefs, FIO_gzipCompression); FIO_setRemoveSrcFile(prefs, 1); }        /* behave like gzip */
       if (exeNameMatch(programName, ZSTD_GUNZIP)) { operation=zom_decompress; FIO_setRemoveSrcFile(prefs, 1); }                                                     /* behave like gunzip, also supports multiple formats */
       if (exeNameMatch(programName, ZSTD_GZCAT)) { operation=zom_decompress; FIO_overwriteMode(prefs); forceStdout=1; followLinks=1; outFileName=stdoutmark; g_displayLevel=1; }   /* behave like gzcat, also supports multiple formats */
       if (exeNameMatch(programName, ZSTD_LZMA)) { suffix = LZMA_EXTENSION; FIO_setCompressionType(prefs, FIO_lzmaCompression); FIO_setRemoveSrcFile(prefs, 1); }    /* behave like lzma */
       if (exeNameMatch(programName, ZSTD_UNLZMA)) { operation=zom_decompress; FIO_setCompressionType(prefs, FIO_lzmaCompression); FIO_setRemoveSrcFile(prefs, 1); } /* behave like unlzma, also supports multiple formats */
       if (exeNameMatch(programName, ZSTD_XZ)) { suffix = XZ_EXTENSION; FIO_setCompressionType(prefs, FIO_xzCompression); FIO_setRemoveSrcFile(prefs, 1); }          /* behave like xz */
       if (exeNameMatch(programName, ZSTD_UNXZ)) { operation=zom_decompress; FIO_setCompressionType(prefs, FIO_xzCompression); FIO_setRemoveSrcFile(prefs, 1); }     /* behave like unxz, also supports multiple formats */
       if (exeNameMatch(programName, ZSTD_LZ4)) { suffix = LZ4_EXTENSION; FIO_setCompressionType(prefs, FIO_lz4Compression); }                                       /* behave like lz4 */
       if (exeNameMatch(programName, ZSTD_UNLZ4)) { operation=zom_decompress; FIO_setCompressionType(prefs, FIO_lz4Compression); }                                   /* behave like unlz4, also supports multiple formats */
       memset(&compressionParams, 0, sizeof(compressionParams));
   
       /* init crash handler */
       FIO_addAbortHandler();
   
       /* command switches */
       for (argNb=1; argNb<argCount; argNb++) {
           const char* argument = argv[argNb];
           if (!argument) continue;   /* Protection if argument empty */
   
           if (nextArgumentsAreFiles) {
               UTIL_refFilename(filenames, argument);
               continue;
           }
   
           /* "-" means stdin/stdout */
           if (!strcmp(argument, "-")){
               UTIL_refFilename(filenames, stdinmark);
               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(prefs); forceStdin=1; forceStdout=1; followLinks=1; allowBlockDevices=1; continue; }
                   if (!strcmp(argument, "--version")) { printVersion(); CLEAN_RETURN(0); }
                   if (!strcmp(argument, "--help")) { usage_advanced(programName); CLEAN_RETURN(0); }
                   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(prefs, 2); continue; }
                   if (!strcmp(argument, "--no-check")) { FIO_setChecksumFlag(prefs, 0); continue; }
                   if (!strcmp(argument, "--sparse")) { FIO_setSparseWrite(prefs, 2); continue; }
                   if (!strcmp(argument, "--no-sparse")) { FIO_setSparseWrite(prefs, 0); continue; }
                   if (!strcmp(argument, "--test")) { operation=zom_test; continue; }
                   if (!strcmp(argument, "--train")) { operation=zom_train; if (outFileName==NULL) outFileName=g_defaultDictName; continue; }
                   if (!strcmp(argument, "--no-dictID")) { FIO_setDictIDFlag(prefs, 0); continue; }
                   if (!strcmp(argument, "--keep")) { FIO_setRemoveSrcFile(prefs, 0); continue; }
                   if (!strcmp(argument, "--rm")) { FIO_setRemoveSrcFile(prefs, 1); continue; }
                   if (!strcmp(argument, "--priority=rt")) { setRealTimePrio = 1; continue; }
                   if (!strcmp(argument, "--show-default-cparams")) { showDefaultCParams = 1; continue; }
                   if (!strcmp(argument, "--content-size")) { contentSize = 1; continue; }
                   if (!strcmp(argument, "--no-content-size")) { contentSize = 0; continue; }
                   if (!strcmp(argument, "--adapt")) { adapt = 1; continue; }
                   if (!strcmp(argument, "--no-row-match-finder")) { useRowMatchFinder = 1; continue; }
                   if (!strcmp(argument, "--row-match-finder")) { useRowMatchFinder = 2; continue; }
                   if (longCommandWArg(&argument, "--adapt=")) { adapt = 1; if (!parseAdaptParameters(argument, &adaptMin, &adaptMax)) { badusage(programName); CLEAN_RETURN(1); } continue; }
                   if (!strcmp(argument, "--single-thread")) { nbWorkers = 0; singleThread = 1; continue; }
                   if (!strcmp(argument, "--format=zstd")) { suffix = ZSTD_EXTENSION; FIO_setCompressionType(prefs, FIO_zstdCompression); continue; }
   #ifdef ZSTD_GZCOMPRESS
                   if (!strcmp(argument, "--format=gzip")) { suffix = GZ_EXTENSION; FIO_setCompressionType(prefs, FIO_gzipCompression); continue; }
   #endif
   #ifdef ZSTD_LZMACOMPRESS
                   if (!strcmp(argument, "--format=lzma")) { suffix = LZMA_EXTENSION; FIO_setCompressionType(prefs, FIO_lzmaCompression);  continue; }
                   if (!strcmp(argument, "--format=xz")) { suffix = XZ_EXTENSION; FIO_setCompressionType(prefs, FIO_xzCompression);  continue; }
   #endif
   #ifdef ZSTD_LZ4COMPRESS
                   if (!strcmp(argument, "--format=lz4")) { suffix = LZ4_EXTENSION; FIO_setCompressionType(prefs, FIO_lz4Compression);  continue; }
   #endif
                   if (!strcmp(argument, "--rsyncable")) { rsyncable = 1; continue; }
                   if (!strcmp(argument, "--compress-literals")) { literalCompressionMode = ZSTD_ps_enable; continue; }
                   if (!strcmp(argument, "--no-compress-literals")) { literalCompressionMode = ZSTD_ps_disable; continue; }
                   if (!strcmp(argument, "--no-progress")) { FIO_setProgressSetting(FIO_ps_never); continue; }
                   if (!strcmp(argument, "--progress")) { FIO_setProgressSetting(FIO_ps_always); continue; }
                   if (!strcmp(argument, "--exclude-compressed")) { FIO_setExcludeCompressedFile(prefs, 1); continue; }
   
                   /* long commands with arguments */
   #ifndef ZSTD_NODICT
                   if (longCommandWArg(&argument, "--train-cover")) {
                     operation = zom_train;
                     if (outFileName == NULL)
                         outFileName = g_defaultDictName;
                     dict = cover;
                     /* Allow optional arguments following an = */
                     if (*argument == 0) { memset(&coverParams, 0, sizeof(coverParams)); }
                     else if (*argument++ != '=') { badusage(programName); CLEAN_RETURN(1); }
                     else if (!parseCoverParameters(argument, &coverParams)) { badusage(programName); CLEAN_RETURN(1); }
                     continue;
                   }
                   if (longCommandWArg(&argument, "--train-fastcover")) {
                     operation = zom_train;
                     if (outFileName == NULL)
                         outFileName = g_defaultDictName;
                     dict = fastCover;
                     /* Allow optional arguments following an = */
                     if (*argument == 0) { memset(&fastCoverParams, 0, sizeof(fastCoverParams)); }
                     else if (*argument++ != '=') { badusage(programName); CLEAN_RETURN(1); }
                     else if (!parseFastCoverParameters(argument, &fastCoverParams)) { badusage(programName); CLEAN_RETURN(1); }
                     continue;
                   }
                   if (longCommandWArg(&argument, "--train-legacy")) {
                     operation = zom_train;
                     if (outFileName == NULL)
                         outFileName = g_defaultDictName;
                     dict = legacy;
                     /* Allow optional arguments following an = */
                     if (*argument == 0) { continue; }
                     else if (*argument++ != '=') { badusage(programName); CLEAN_RETURN(1); }
                     else if (!parseLegacyParameters(argument, &dictSelect)) { badusage(programName); CLEAN_RETURN(1); }
                     continue;
                   }
   #endif
                   if (longCommandWArg(&argument, "--threads")) { NEXT_UINT32(nbWorkers); continue; }
                   if (longCommandWArg(&argument, "--memlimit")) { NEXT_UINT32(memLimit); continue; }
                   if (longCommandWArg(&argument, "--memory")) { NEXT_UINT32(memLimit); continue; }
                   if (longCommandWArg(&argument, "--memlimit-decompress")) { NEXT_UINT32(memLimit); continue; }
                   if (longCommandWArg(&argument, "--block-size=")) { blockSize = readSizeTFromChar(&argument); continue; }
                   if (longCommandWArg(&argument, "--maxdict")) { NEXT_UINT32(maxDictSize); continue; }
                   if (longCommandWArg(&argument, "--dictID")) { NEXT_UINT32(dictID); continue; }
                   if (longCommandWArg(&argument, "--zstd=")) { if (!parseCompressionParameters(argument, &compressionParams)) { badusage(programName); CLEAN_RETURN(1); } continue; }
                   if (longCommandWArg(&argument, "--stream-size=")) { streamSrcSize = readSizeTFromChar(&argument); continue; }
                   if (longCommandWArg(&argument, "--target-compressed-block-size=")) { targetCBlockSize = readSizeTFromChar(&argument); continue; }
                   if (longCommandWArg(&argument, "--size-hint=")) { srcSizeHint = readSizeTFromChar(&argument); continue; }
                   if (longCommandWArg(&argument, "--output-dir-flat")) { NEXT_FIELD(outDirName); continue; }
   #ifdef ZSTD_MULTITHREAD
                   if (longCommandWArg(&argument, "--auto-threads")) {
                       const char* threadDefault = NULL;
                       NEXT_FIELD(threadDefault);
                       if (strcmp(threadDefault, "logical") == 0)
                           defaultLogicalCores = 1;
                      continue;
                  }
  #endif
  #ifdef UTIL_HAS_MIRRORFILELIST
                  if (longCommandWArg(&argument, "--output-dir-mirror")) { NEXT_FIELD(outMirroredDirName); continue; }
  #endif
  #ifndef ZSTD_NOTRACE
                  if (longCommandWArg(&argument, "--trace")) { char const* traceFile; NEXT_FIELD(traceFile); TRACE_enable(traceFile); continue; }
  #endif
                  if (longCommandWArg(&argument, "--patch-from")) { NEXT_FIELD(patchFromDictFileName); 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 */
                          badusage(programName);
                          CLEAN_RETURN(1);
                      }
                      /* Only set windowLog if not already set by --zstd */
                      if (compressionParams.windowLog == 0)
                          compressionParams.windowLog = ldmWindowLog;
                      continue;
                  }
  #ifndef ZSTD_NOCOMPRESS   /* linking ZSTD_minCLevel() requires compression support */
                  if (longCommandWArg(&argument, "--fast")) {
                      /* Parse optional acceleration factor */
                      if (*argument == '=') {
                          U32 const maxFast = (U32)-ZSTD_minCLevel();
                          U32 fastLevel;
                          ++argument;
                          fastLevel = readU32FromChar(&argument);
                          if (fastLevel > maxFast) fastLevel = maxFast;
                          if (fastLevel) {
                              dictCLevel = cLevel = -(int)fastLevel;
                          } else {
                              badusage(programName);
                              CLEAN_RETURN(1);
                          }
                      } else if (*argument != 0) {
                          /* Invalid character following --fast */
                          badusage(programName);
                          CLEAN_RETURN(1);
                      } else {
                          cLevel = -1;  /* default for --fast */
                      }
                      continue;
                  }
  #endif
  
                  if (longCommandWArg(&argument, "--filelist")) {
                      const char* listName;
                      NEXT_FIELD(listName);
                      UTIL_refFilename(file_of_names, listName);
                      continue;
                  }
  
                  /* fall-through, will trigger bad_usage() later on */
              }
  
              argument++;
              while (argument[0]!=0) {
  
  #ifndef ZSTD_NOCOMPRESS
                  /* compression Level */
                  if ((*argument>='') && (*argument<='9')) {
                      dictCLevel = cLevel = (int)readU32FromChar(&argument);
                      continue;
                  }
  #endif
  
                  switch(argument[0])
                  {
                      /* Display help */
                  case 'V': printVersion(); CLEAN_RETURN(0);   /* Version Only */
                  case 'H':
                  case 'h': usage_advanced(programName); CLEAN_RETURN(0);
  
                       /* Compress */
                  case 'z': operation=zom_compress; argument++; break;
  
                       /* Decoding */
                  case 'd':
  #ifndef ZSTD_NOBENCH
                          benchParams.mode = BMK_decodeOnly;
                          if (operation==zom_bench) { 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': argument++; NEXT_FIELD(dictFileName); break;
  
                      /* Overwrite */
                  case 'f': FIO_overwriteMode(prefs); forceStdin=1; forceStdout=1; followLinks=1; allowBlockDevices=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(prefs, 0); argument++; break;
  
                      /* Checksum */
                  case 'C': FIO_setChecksumFlag(prefs, 2); argument++; break;
  
                      /* test compressed file */
                  case 't': operation=zom_test; argument++; break;
  
                      /* destination file name */
                  case 'o': argument++; NEXT_FIELD(outFileName); break;
  
                      /* limit 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 = (int)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++;
                      nbWorkers = (int)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>='') && (*argument<='9')) {
                          benchParams.additionalParam = (int)readU32FromChar(&argument);
                      } else
  #endif
                          main_pause=1;
                      break;
  
                      /* Select compressibility of synthetic sample */
                  case 'P':
                      argument++;
                      compressibility = (double)readU32FromChar(&argument) / 100;
                      break;
  
                      /* unknown command */
                  default : badusage(programName); CLEAN_RETURN(1);
                  }
              }
              continue;
          }   /* if (argument[0]=='-') */
  
          /* none of the above : add filename to list */
          UTIL_refFilename(filenames, argument);
      }
  
      /* Welcome message (if verbose) */
      DISPLAYLEVEL(3, WELCOME_MESSAGE);
  
  #ifdef ZSTD_MULTITHREAD
      if ((nbWorkers==0) && (!singleThread)) {
          /* automatically set # workers based on # of reported cpus */
          if (defaultLogicalCores) {
              nbWorkers = UTIL_countLogicalCores();
              DISPLAYLEVEL(3, "Note: %d logical core(s) detected \n", nbWorkers);
          } else {
              nbWorkers = UTIL_countPhysicalCores();
              DISPLAYLEVEL(3, "Note: %d physical core(s) detected \n", nbWorkers);
          }
      }
  #else
      (void)singleThread; (void)nbWorkers;
  #endif
  
      g_utilDisplayLevel = g_displayLevel;
  
  #ifdef UTIL_HAS_CREATEFILELIST
      if (!followLinks) {
          unsigned u, fileNamesNb;
          unsigned const nbFilenames = (unsigned)filenames->tableSize;
          for (u=0, fileNamesNb=0; u<nbFilenames; u++) {
              if ( UTIL_isLink(filenames->fileNames[u])
               && !UTIL_isFIFO(filenames->fileNames[u])
              ) {
                  DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring \n", filenames->fileNames[u]);
              } else {
                  filenames->fileNames[fileNamesNb++] = filenames->fileNames[u];
          }   }
          if (fileNamesNb == 0 && nbFilenames > 0)  /* all names are eliminated */
              CLEAN_RETURN(1);
          filenames->tableSize = fileNamesNb;
      }   /* if (!followLinks) */
  
      /* read names from a file */
      if (file_of_names->tableSize) {
          size_t const nbFileLists = file_of_names->tableSize;
          size_t flNb;
          for (flNb=0; flNb < nbFileLists; flNb++) {
              FileNamesTable* const fnt = UTIL_createFileNamesTable_fromFileName(file_of_names->fileNames[flNb]);
              if (fnt==NULL) {
                  DISPLAYLEVEL(1, "zstd: error reading %s \n", file_of_names->fileNames[flNb]);
                  CLEAN_RETURN(1);
              }
              filenames = UTIL_mergeFileNamesTable(filenames, fnt);
          }
      }
  
      if (recursive) {  /* at this stage, filenameTable is a list of paths, which can contain both files and directories */
          UTIL_expandFNT(&filenames, followLinks);
      }
  #else
      (void)followLinks;
  #endif
  
      if (operation == zom_list) {
  #ifndef ZSTD_NODECOMPRESS
          int const ret = FIO_listMultipleFiles((unsigned)filenames->tableSize, filenames->fileNames, 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
          benchParams.blockSize = blockSize;
          benchParams.nbWorkers = nbWorkers;
          benchParams.realTime = (unsigned)setRealTimePrio;
          benchParams.nbSeconds = bench_nbSeconds;
          benchParams.ldmFlag = ldmFlag;
          benchParams.ldmMinMatch = (int)g_ldmMinMatch;
          benchParams.ldmHashLog = (int)g_ldmHashLog;
          benchParams.useRowMatchFinder = useRowMatchFinder;
          if (g_ldmBucketSizeLog != LDM_PARAM_DEFAULT) {
              benchParams.ldmBucketSizeLog = (int)g_ldmBucketSizeLog;
          }
          if (g_ldmHashRateLog != LDM_PARAM_DEFAULT) {
              benchParams.ldmHashRateLog = (int)g_ldmHashRateLog;
          }
          benchParams.literalCompressionMode = literalCompressionMode;
  
          if (cLevel > ZSTD_maxCLevel()) cLevel = ZSTD_maxCLevel();
          if (cLevelLast > ZSTD_maxCLevel()) cLevelLast = ZSTD_maxCLevel();
          if (cLevelLast < cLevel) cLevelLast = cLevel;
          if (cLevelLast > cLevel)
              DISPLAYLEVEL(3, "Benchmarking levels from %d to %d\n", cLevel, cLevelLast);
          if (filenames->tableSize > 0) {
              if(separateFiles) {
                  unsigned i;
                  for(i = 0; i < filenames->tableSize; i++) {
                      int c;
                      DISPLAYLEVEL(3, "Benchmarking %s \n", filenames->fileNames[i]);
                      for(c = cLevel; c <= cLevelLast; c++) {
                          BMK_benchFilesAdvanced(&filenames->fileNames[i], 1, dictFileName, c, &compressionParams, g_displayLevel, &benchParams);
                  }   }
              } else {
                  for(; cLevel <= cLevelLast; cLevel++) {
                      BMK_benchFilesAdvanced(filenames->fileNames, (unsigned)filenames->tableSize, dictFileName, cLevel, &compressionParams, g_displayLevel, &benchParams);
              }   }
          } else {
              for(; cLevel <= cLevelLast; cLevel++) {
                  BMK_syntheticTest(cLevel, compressibility, &compressionParams, g_displayLevel, &benchParams);
          }   }
  
  #else
          (void)bench_nbSeconds; (void)blockSize; (void)setRealTimePrio; (void)separateFiles; (void)compressibility;
  #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 = (unsigned)g_displayLevel;
          zParams.dictID = dictID;
          if (dict == cover) {
              int const optimize = !coverParams.k || !coverParams.d;
              coverParams.nbThreads = (unsigned)nbWorkers;
              coverParams.zParams = zParams;
              operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (int)filenames->tableSize, blockSize, NULL, &coverParams, NULL, optimize, memLimit);
          } else if (dict == fastCover) {
              int const optimize = !fastCoverParams.k || !fastCoverParams.d;
              fastCoverParams.nbThreads = (unsigned)nbWorkers;
              fastCoverParams.zParams = zParams;
              operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (int)filenames->tableSize, blockSize, NULL, NULL, &fastCoverParams, optimize, memLimit);
          } else {
              ZDICT_legacy_params_t dictParams;
              memset(&dictParams, 0, sizeof(dictParams));
              dictParams.selectivityLevel = dictSelect;
              dictParams.zParams = zParams;
              operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (int)filenames->tableSize, blockSize, &dictParams, NULL, NULL, 0, memLimit);
          }
  #else
          (void)dictCLevel; (void)dictSelect; (void)dictID;  (void)maxDictSize; /* not used when ZSTD_NODICT set */
          DISPLAYLEVEL(1, "training mode not available \n");
          operationResult = 1;
  #endif
          goto _end;
      }
  
  #ifndef ZSTD_NODECOMPRESS
      if (operation==zom_test) { FIO_setTestMode(prefs, 1); outFileName=nulmark; FIO_setRemoveSrcFile(prefs, 0); }  /* test mode */
  #endif
  
      /* No input filename ==> use stdin and stdout */
      if (filenames->tableSize == 0) UTIL_refFilename(filenames, stdinmark);
      if (!strcmp(filenames->fileNames[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 (!forceStdin
       && !strcmp(filenames->fileNames[0], stdinmark)
       && IS_CONSOLE(stdin) ) {
          DISPLAYLEVEL(1, "stdin is a console, aborting\n");
          CLEAN_RETURN(1);
      }
      if ( outFileName && !strcmp(outFileName, stdoutmark)
        && IS_CONSOLE(stdout)
        && !strcmp(filenames->fileNames[0], stdinmark)
        && !forceStdout
        && operation!=zom_decompress ) {
          DISPLAYLEVEL(1, "stdout is a console, aborting\n");
          CLEAN_RETURN(1);
      }
  
  #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
  
      if (showDefaultCParams) {
          if (operation == zom_decompress) {
              DISPLAY("error : can't use --show-default-cparams in decomrpession mode \n");
              CLEAN_RETURN(1);
          }
      }
  
      if (dictFileName != NULL && patchFromDictFileName != NULL) {
          DISPLAY("error : can't use -D and --patch-from=# at the same time \n");
          CLEAN_RETURN(1);
      }
  
      if (patchFromDictFileName != NULL && filenames->tableSize > 1) {
          DISPLAY("error : can't use --patch-from=# on multiple files \n");
          CLEAN_RETURN(1);
      }
  
      /* No status message in pipe mode (stdin - stdout) */
      hasStdout = outFileName && !strcmp(outFileName,stdoutmark);
  
      if ((hasStdout || !IS_CONSOLE(stderr)) && (g_displayLevel==2)) g_displayLevel=1;
  
      /* IO Stream/File */
      FIO_setHasStdoutOutput(fCtx, hasStdout);
      FIO_setNbFilesTotal(fCtx, (int)filenames->tableSize);
      FIO_determineHasStdinInput(fCtx, filenames);
      FIO_setNotificationLevel(g_displayLevel);
      FIO_setAllowBlockDevices(prefs, allowBlockDevices);
      FIO_setPatchFromMode(prefs, patchFromDictFileName != NULL);
      if (memLimit == 0) {
          if (compressionParams.windowLog == 0) {
              memLimit = (U32)1 << g_defaultMaxWindowLog;
          } else {
              memLimit = (U32)1 << (compressionParams.windowLog & 31);
      }   }
      if (patchFromDictFileName != NULL)
          dictFileName = patchFromDictFileName;
      FIO_setMemLimit(prefs, memLimit);
      if (operation==zom_compress) {
  #ifndef ZSTD_NOCOMPRESS
          FIO_setContentSize(prefs, contentSize);
          FIO_setNbWorkers(prefs, nbWorkers);
          FIO_setBlockSize(prefs, (int)blockSize);
          if (g_overlapLog!=OVERLAP_LOG_DEFAULT) FIO_setOverlapLog(prefs, (int)g_overlapLog);
          FIO_setLdmFlag(prefs, (unsigned)ldmFlag);
          FIO_setLdmHashLog(prefs, (int)g_ldmHashLog);
          FIO_setLdmMinMatch(prefs, (int)g_ldmMinMatch);
          if (g_ldmBucketSizeLog != LDM_PARAM_DEFAULT) FIO_setLdmBucketSizeLog(prefs, (int)g_ldmBucketSizeLog);
          if (g_ldmHashRateLog != LDM_PARAM_DEFAULT) FIO_setLdmHashRateLog(prefs, (int)g_ldmHashRateLog);
          FIO_setAdaptiveMode(prefs, (unsigned)adapt);
          FIO_setUseRowMatchFinder(prefs, useRowMatchFinder);
          FIO_setAdaptMin(prefs, adaptMin);
          FIO_setAdaptMax(prefs, adaptMax);
          FIO_setRsyncable(prefs, rsyncable);
          FIO_setStreamSrcSize(prefs, streamSrcSize);
          FIO_setTargetCBlockSize(prefs, targetCBlockSize);
          FIO_setSrcSizeHint(prefs, srcSizeHint);
          FIO_setLiteralCompressionMode(prefs, literalCompressionMode);
          if (adaptMin > cLevel) cLevel = adaptMin;
          if (adaptMax < cLevel) cLevel = adaptMax;
  
          /* Compare strategies constant with the ground truth */
          { ZSTD_bounds strategyBounds = ZSTD_cParam_getBounds(ZSTD_c_strategy);
            assert(ZSTD_NB_STRATEGIES == strategyBounds.upperBound);
            (void)strategyBounds; }
  
          if (showDefaultCParams || g_displayLevel >= 4) {
              size_t fileNb;
              for (fileNb = 0; fileNb < (size_t)filenames->tableSize; fileNb++) {
                  if (showDefaultCParams)
                      printDefaultCParams(filenames->fileNames[fileNb], dictFileName, cLevel);
                  if (g_displayLevel >= 4)
                      printActualCParams(filenames->fileNames[fileNb], dictFileName, cLevel, &compressionParams);
              }
          }
  
          if (g_displayLevel >= 4)
              FIO_displayCompressionParameters(prefs);
          if ((filenames->tableSize==1) && outFileName)
              operationResult = FIO_compressFilename(fCtx, prefs, outFileName, filenames->fileNames[0], dictFileName, cLevel, compressionParams);
          else
              operationResult = FIO_compressMultipleFilenames(fCtx, prefs, filenames->fileNames, outMirroredDirName, outDirName, outFileName, suffix, dictFileName, cLevel, compressionParams);
  #else
          (void)contentSize; (void)suffix; (void)adapt; (void)rsyncable; (void)ultra; (void)cLevel; (void)ldmFlag; (void)literalCompressionMode; (void)targetCBlockSize; (void)streamSrcSize; (void)srcSizeHint; (void)ZSTD_strategyMap; (void)useRowMatchFinder; /* not used when ZSTD_NOCOMPRESS set */
          DISPLAY("Compression not supported \n");
  #endif
      } else {  /* decompression or test */
  #ifndef ZSTD_NODECOMPRESS
          if (filenames->tableSize == 1 && outFileName) {
              operationResult = FIO_decompressFilename(fCtx, prefs, outFileName, filenames->fileNames[0], dictFileName);
          } else {
              operationResult = FIO_decompressMultipleFilenames(fCtx, prefs, filenames->fileNames, outMirroredDirName, outDirName, outFileName, dictFileName);
          }
  #else
          DISPLAY("Decompression not supported \n");
  #endif
      }
  
  _end:
      FIO_freePreferences(prefs);
      FIO_freeContext(fCtx);
      if (main_pause) waitEnter();
      UTIL_freeFileNamesTable(filenames);
      UTIL_freeFileNamesTable(file_of_names);
  #ifndef ZSTD_NOTRACE
      TRACE_finish();
  #endif
  
      return operationResult;
  }

Cache object: 9caff9d514e7ea3772b5282a951b34b4