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zstd/programs/zstdcli.c
Yann Collet 6aa896adc6 zstd cli : control maximum compression level
2016-02-16 16:33:48 +01:00

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/*
zstdcli - Command Line Interface (cli) for zstd
Copyright (C) Yann Collet 2014-2016
GPL v2 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
You can contact the author at :
- zstd homepage : http://www.zstd.net/
*/
/*
Note : this is user program, not part of libzstd.
The license of this command line program is GPLv2.
The license of libzstd is BSD.
*/
/*-************************************
* Compiler Options
**************************************/
#define _CRT_SECURE_NO_WARNINGS /* Visual : removes warning from strcpy */
#define _POSIX_SOURCE 1 /* triggers fileno() within <stdio.h> on unix */
/*-************************************
* Includes
**************************************/
#include <stdio.h> /* fprintf, getchar */
#include <stdlib.h> /* exit, calloc, free */
#include <string.h> /* strcmp, strlen */
#include "fileio.h"
#ifndef ZSTD_NOBENCH
# include "bench.h" /* BMK_benchFiles, BMK_SetNbIterations */
#endif
#include "zstd_static.h" /* ZSTD_maxCLevel, ZSTD version numbers */
#ifndef ZSTD_NODICT
# include "dibio.h" /* BMK_benchFiles, BMK_SetNbIterations */
#endif
/*-************************************
* OS-specific Includes
**************************************/
#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__)
# include <fcntl.h> /* _O_BINARY */
# include <io.h> /* _setmode, _isatty */
# define SET_BINARY_MODE(file) _setmode(_fileno(file), _O_BINARY)
# define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
#else
# include <unistd.h> /* isatty */
# define SET_BINARY_MODE(file)
# define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
#endif
/*-************************************
* Constants
**************************************/
#define COMPRESSOR_NAME "zstd command line interface"
#ifndef ZSTD_VERSION
# define QUOTE(str) #str
# define EXPAND_AND_QUOTE(str) QUOTE(str)
# define ZSTD_VERSION "v" EXPAND_AND_QUOTE(ZSTD_VERSION_MAJOR) "." EXPAND_AND_QUOTE(ZSTD_VERSION_MINOR) "." EXPAND_AND_QUOTE(ZSTD_VERSION_RELEASE)
#endif
#define AUTHOR "Yann Collet"
#define WELCOME_MESSAGE "*** %s %i-bits %s, by %s ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), ZSTD_VERSION, AUTHOR
#define ZSTD_EXTENSION ".zst"
#define ZSTD_CAT "zstdcat"
#define ZSTD_UNZSTD "unzstd"
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
static const char* g_defaultDictName = "dictionary";
static const unsigned g_defaultMaxDictSize = 110 KB;
static const unsigned g_defaultDictCLevel = 5;
static const unsigned g_defaultSelectivityLevel = 9;
/*-************************************
* Display Macros
**************************************/
#define DISPLAY(...) fprintf(displayOut, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static FILE* displayOut;
static unsigned displayLevel = 2; /* 0 : no display, 1: errors, 2 : + result + interaction + warnings, 3 : + progression, 4 : + information */
/*-************************************
* 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");
DISPLAY( " -# : # compression level (1-%u, default:1) \n", ZSTD_maxCLevel());
DISPLAY( " -d : decompression \n");
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 \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( " -t : test compressed file integrity \n");
DISPLAY( " -v : verbose mode\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");
#ifndef ZSTD_NODICT
DISPLAY( "Dictionary builder :\n");
DISPLAY( "--train : create a dictionary from a training set of files \n");
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( " -s# : dictionary selectivity level (default: %u)\n", g_defaultSelectivityLevel);
#endif
#ifndef ZSTD_NOBENCH
DISPLAY( "Benchmark arguments :\n");
DISPLAY( " -b# : benchmark file(s), using # compression level (default : 1) \n");
DISPLAY( " -i# : iteration loops [1-9](default : 3)\n");
DISPLAY( " -B# : cut file into independent blocks of size # (default: no block)\n");
DISPLAY( " -r# : test all compression levels from 1 to # (default: disabled)\n");
#endif
return 0;
}
static int badusage(const char* programName)
{
DISPLAYLEVEL(1, "Incorrect parameters\n");
if (displayLevel >= 1) usage(programName);
return 1;
}
static void waitEnter(void)
{
int unused;
DISPLAY("Press enter to continue...\n");
unused = getchar();
(void)unused;
}
int main(int argCount, const char** argv)
{
int i,
bench=0,
decode=0,
forceStdout=0,
main_pause=0,
nextEntryIsDictionary=0,
operationResult=0,
dictBuild=0,
nextArgumentIsOutFileName=0,
nextArgumentIsMaxDict=0;
unsigned cLevel = 1;
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;
char* dynNameSpace = NULL;
int rangeBench = 1;
unsigned maxDictSize = g_defaultMaxDictSize;
unsigned dictCLevel = g_defaultDictCLevel;
unsigned dictSelect = g_defaultSelectivityLevel;
/* init */
(void)rangeBench; (void)dictCLevel; /* not used when ZSTD_NOBENCH / ZSTD_NODICT set */
if (filenameTable==NULL) { DISPLAY("not enough memory\n"); exit(1); }
displayOut = stderr;
/* Pick out program name from path. Don't rely on stdlib because of conflicting behavior */
for (i = (int)strlen(programName); i > 0; i--) { if (programName[i] == '/') { i++; break; } }
programName += i;
/* preset behaviors */
if (!strcmp(programName, ZSTD_UNZSTD)) decode=1;
if (!strcmp(programName, ZSTD_CAT)) { decode=1; forceStdout=1; displayLevel=1; outFileName=stdoutmark; }
/* command switches */
for(i=1; i<argCount; i++) {
const char* argument = argv[i];
if(!argument) continue; /* Protection if argument empty */
/* long commands (--long-word) */
if (!strcmp(argument, "--decompress")) { decode=1; continue; }
if (!strcmp(argument, "--force")) { FIO_overwriteMode(); continue; }
if (!strcmp(argument, "--version")) { displayOut=stdout; DISPLAY(WELCOME_MESSAGE); return 0; }
if (!strcmp(argument, "--help")) { displayOut=stdout; return usage_advanced(programName); }
if (!strcmp(argument, "--verbose")) { displayLevel=4; continue; }
if (!strcmp(argument, "--quiet")) { displayLevel--; continue; }
if (!strcmp(argument, "--stdout")) { forceStdout=1; outFileName=stdoutmark; displayLevel=1; continue; }
if (!strcmp(argument, "--test")) { decode=1; outFileName=nulmark; FIO_overwriteMode(); continue; }
if (!strcmp(argument, "--train")) { dictBuild=1; outFileName=g_defaultDictName; continue; }
if (!strcmp(argument, "--maxdict")) { nextArgumentIsMaxDict=1; continue; }
if (!strcmp(argument, "--keep")) { continue; } /* does nothing, since preserving input is default; for gzip/xz compatibility */
/* '-' means stdin/stdout */
if (!strcmp(argument, "-")){
if (!filenameIdx) { filenameIdx=1, filenameTable[0]=stdinmark; continue; }
outFileName=stdoutmark; continue;
}
/* Decode commands (note : aggregated commands are allowed) */
if (argument[0]=='-') {
argument++;
while (argument[0]!=0) {
/* compression Level */
if ((*argument>='0') && (*argument<='9')) {
cLevel = 0;
while ((*argument >= '0') && (*argument <= '9')) {
cLevel *= 10;
cLevel += *argument - '0';
argument++;
}
dictCLevel = cLevel;
if (dictCLevel > ZSTD_maxCLevel())
return badusage(programName);
continue;
}
switch(argument[0])
{
/* Display help */
case 'V': displayOut=stdout; DISPLAY(WELCOME_MESSAGE); return 0; /* Version Only */
case 'H':
case 'h': displayOut=stdout; return usage_advanced(programName);
/* Decoding */
case 'd': decode=1; argument++; break;
/* Force stdout, even if stdout==console */
case 'c': forceStdout=1; outFileName=stdoutmark; displayLevel=1; argument++; break;
/* Use file content as dictionary */
case 'D': nextEntryIsDictionary = 1; argument++; break;
/* Overwrite */
case 'f': FIO_overwriteMode(); argument++; break;
/* Verbose mode */
case 'v': displayLevel=4; argument++; break;
/* Quiet mode */
case 'q': displayLevel--; argument++; break;
/* keep source file (default anyway, so useless; for gzip/xz compatibility) */
case 'k': argument++; break;
/* test compressed file */
case 't': decode=1; outFileName=nulmark; FIO_overwriteMode(); argument++; break;
/* dictionary name */
case 'o': nextArgumentIsOutFileName=1; argument++; break;
#ifndef ZSTD_NOBENCH
/* Benchmark */
case 'b': bench=1; argument++; break;
/* Modify Nb Iterations (benchmark only) */
case 'i':
{
int iters= 0;
argument++;
while ((*argument >='0') && (*argument <='9'))
iters *= 10, iters += *argument++ - '0';
BMK_SetNbIterations(iters);
}
break;
/* cut input into blocks (benchmark only) */
case 'B':
{
size_t bSize = 0;
argument++;
while ((*argument >='0') && (*argument <='9'))
bSize *= 10, bSize += *argument++ - '0';
if (*argument=='K') bSize<<=10, argument++; /* allows using KB notation */
if (*argument=='M') bSize<<=20, argument++;
if (*argument=='B') argument++;
BMK_SetBlockSize(bSize);
}
break;
/* range bench (benchmark only) */
case 'r':
rangeBench = -1;
argument++;
break;
#endif /* ZSTD_NOBENCH */
/* Selection level */
case 's': argument++;
dictSelect = 0;
while ((*argument >= '0') && (*argument <= '9'))
dictSelect *= 10, dictSelect += *argument++ - '0';
break;
/* Pause at the end (hidden option) */
case 'p': main_pause=1; argument++; break;
/* unknown command */
default : return badusage(programName);
}
}
continue;
}
if (nextEntryIsDictionary) {
nextEntryIsDictionary = 0;
dictFileName = argument;
continue;
}
if (nextArgumentIsOutFileName) {
nextArgumentIsOutFileName = 0;
outFileName = argument;
if (!strcmp(outFileName, "-")) outFileName = stdoutmark;
continue;
}
if (nextArgumentIsMaxDict) {
nextArgumentIsMaxDict = 0;
maxDictSize = 0;
while ((*argument>='0') && (*argument<='9'))
maxDictSize = maxDictSize * 10 + (*argument - '0'), argument++;
if (*argument=='k' || *argument=='K')
maxDictSize <<= 10;
continue;
}
/* add filename to list */
filenameTable[filenameIdx++] = argument;
}
/* Welcome message (if verbose) */
DISPLAYLEVEL(3, WELCOME_MESSAGE);
/* Check if benchmark is selected */
if (bench) {
#ifndef ZSTD_NOBENCH
BMK_benchFiles(filenameTable, filenameIdx, dictFileName, cLevel*rangeBench);
#endif
goto _end;
}
/* Check if dictionary builder is selected */
if (dictBuild) {
#ifndef ZSTD_NODICT
ZDICT_params_t dictParams;
dictParams.compressionLevel = dictCLevel;
dictParams.selectivityLevel = dictSelect;
dictParams.notificationLevel = displayLevel;
DiB_trainFromFiles(outFileName, maxDictSize, filenameTable, filenameIdx, dictParams);
#endif
goto _end;
}
/* No input filename ==> use stdin and stdout */
if(!filenameIdx) filenameIdx=1, filenameTable[0]=stdinmark, outFileName=stdoutmark;
/* Check if input/output defined as console; trigger an error in this case */
if (!strcmp(filenameTable[0], stdinmark) && IS_CONSOLE(stdin) ) return badusage(programName);
if (outFileName && !strcmp(outFileName, stdoutmark) && IS_CONSOLE(stdout) && !forceStdout) 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);
return filenameIdx;
}
/* No warning message in pipe mode (stdin + stdout) or multiple mode */
if (!strcmp(filenameTable[0], stdinmark) && !strcmp(outFileName,stdoutmark) && (displayLevel==2)) displayLevel=1;
if ((filenameIdx>1) && (displayLevel==2)) displayLevel=1;
/* IO Stream/File */
FIO_setNotificationLevel(displayLevel);
if (decode) {
if (filenameIdx==1 && outFileName)
operationResult = FIO_decompressFilename(outFileName, filenameTable[0], dictFileName);
else
operationResult = FIO_decompressMultipleFilenames(filenameTable, filenameIdx, outFileName ? outFileName : ZSTD_EXTENSION, dictFileName);
} else { /* compression */
if (filenameIdx==1 && outFileName)
operationResult = FIO_compressFilename(outFileName, filenameTable[0], dictFileName, cLevel);
else
operationResult = FIO_compressMultipleFilenames(filenameTable, filenameIdx, outFileName ? outFileName : ZSTD_EXTENSION, dictFileName, cLevel);
}
_end:
if (main_pause) waitEnter();
free(dynNameSpace);
free((void*)filenameTable);
return operationResult;
}
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