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zstd/programs/zstdcli.c
Yann Collet a5c737411a complex level selector
2015-11-22 14:16:56 +01:00

387 lines
14 KiB
C
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/*
zstdcli - Command Line Interface (cli) for zstd
Copyright (C) Yann Collet 2014-2015
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 source repository : https://github.com/Cyan4973/zstd
- ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/*
Note : this is user program.
It is not part of zstd compression library.
The license of this compression CLI program is GPLv2.
The license of zstd library 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 "bench.h" /* BMK_benchFiles, BMK_SetNbIterations */
#include "fileio.h"
/**************************************
* OS-specific Includes
**************************************/
#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__)
# include <fcntl.h> // _O_BINARY
# include <io.h> // _setmode, _isatty
# ifdef __MINGW32__
/* int _fileno(FILE *stream); // seems no longer useful // MINGW somehow forgets to include this windows declaration into <stdio.h> */
# endif
# 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 ZSTD_VERSION "v0.4.0"
#endif
#define AUTHOR "Yann Collet"
#define WELCOME_MESSAGE "*** %s %i-bits %s, by %s (%s) ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), ZSTD_VERSION, AUTHOR, __DATE__
#define ZSTD_EXTENSION ".zst"
#define ZSTD_CAT "zstdcat"
#define ZSTD_UNZSTD "unzstd"
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
/**************************************
* 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
/**************************************
* Exceptions
**************************************/
#define DEBUG 0
#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
#define EXM_THROW(error, ...) \
{ \
DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "Error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, "\n"); \
exit(error); \
}
/**************************************
* Command Line
**************************************/
static int usage(const char* programName)
{
DISPLAY( "Usage :\n");
DISPLAY( " %s [arg] [input] [output]\n", programName);
DISPLAY( "\n");
DISPLAY( "input : a filename\n");
DISPLAY( " with no FILE, or when FILE is - , read standard input\n");
DISPLAY( "Arguments :\n");
DISPLAY( " -1 : Fast compression (default) \n");
DISPLAY( " -9 : High compression \n");
DISPLAY( " -d : decompression (default for %s extension)\n", ZSTD_EXTENSION);
//DISPLAY( " -z : force compression\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( " -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");
//DISPLAY( " -t : test compressed file integrity\n");
DISPLAY( "Benchmark arguments :\n");
DISPLAY( " -b# : benchmark file(s), using # compression level (default : 1) \n");
DISPLAY( " -B# : cut file into independent blocks of size # (default : no block)\n");
DISPLAY( " -i# : iteration loops [1-9](default : 3)\n");
DISPLAY( " -r# : test all compression levels from 1 to # (default : disabled)\n");
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,
rangeBench = 1;
unsigned fileNameStart = 0;
unsigned nbFiles = 0;
unsigned cLevel = 1;
const char* programName = argv[0];
const char* inFileName = NULL;
const char* outFileName = NULL;
char* dynNameSpace = NULL;
const char extension[] = ZSTD_EXTENSION;
displayOut = stderr;
/* Pick out basename component. Don't rely on stdlib because of conflicting behavior. */
for (i = (int)strlen(programName); i > 0; i--)
{
if (programName[i] == '/') { i++; break; }
}
programName += i;
/* zstdcat preset behavior */
if (!strcmp(programName, ZSTD_CAT)) { decode=1; forceStdout=1; displayLevel=1; outFileName=stdoutmark; }
/* unzstd preset behavior */
if (!strcmp(programName, ZSTD_UNZSTD))
decode=1;
/* 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, "--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; }
/* Decode commands (note : aggregated commands are allowed) */
if (argument[0]=='-')
{
/* '-' means stdin/stdout */
if (argument[1]==0)
{
if (!inFileName) inFileName=stdinmark;
else outFileName=stdoutmark;
continue;
}
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++;
}
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);
/* Compression (default) */
//case 'z': forceCompress = 1; break;
/* Decoding */
case 'd': decode=1; argument++; break;
/* Force stdout, even if stdout==console */
case 'c': forceStdout=1; outFileName=stdoutmark; displayLevel=1; argument++; break;
// Test
//case 't': decode=1; LZ4IO_setOverwrite(1); output_filename=nulmark; 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; only for xz/lzma compatibility) */
case 'k': argument++; break;
/* 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;
/* Pause at the end (hidden option) */
case 'p': main_pause=1; argument++; break;
/* unknown command */
default : return badusage(programName);
}
}
continue;
}
/* first provided filename is input */
if (!inFileName) { inFileName = argument; fileNameStart = i; nbFiles = argCount-i; continue; }
/* second provided filename is output */
if (!outFileName)
{
outFileName = argument;
if (!strcmp (outFileName, nullString)) outFileName = nulmark;
continue;
}
}
/* Welcome message (if verbose) */
DISPLAYLEVEL(3, WELCOME_MESSAGE);
/* No input filename ==> use stdin */
if(!inFileName) { inFileName=stdinmark; }
/* Check if input defined as console; trigger an error in this case */
if (!strcmp(inFileName, stdinmark) && IS_CONSOLE(stdin) ) return badusage(programName);
/* Check if benchmark is selected */
if (bench) { BMK_benchFiles(argv+fileNameStart, nbFiles, cLevel*rangeBench); goto _end; }
/* No output filename ==> try to select one automatically (when possible) */
while (!outFileName)
{
if (!IS_CONSOLE(stdout)) { outFileName=stdoutmark; break; } /* Default to stdout whenever possible (i.e. not a console) */
if (!decode) /* compression to file */
{
size_t l = strlen(inFileName);
dynNameSpace = (char*)calloc(1,l+5);
if (dynNameSpace==NULL) { DISPLAY("not enough memory\n"); exit(1); }
strcpy(dynNameSpace, inFileName);
strcpy(dynNameSpace+l, ZSTD_EXTENSION);
outFileName = dynNameSpace;
DISPLAYLEVEL(2, "Compressed filename will be : %s \n", outFileName);
break;
}
/* decompression to file (automatic name will work only if input filename has correct format extension) */
{
size_t filenameSize = strlen(inFileName);
if (strcmp(inFileName + (filenameSize-4), extension))
{
DISPLAYLEVEL(1, "unknown suffix - cannot determine destination filename\n");
return badusage(programName);
}
dynNameSpace = (char*)calloc(1,filenameSize+1);
if (dynNameSpace==NULL) { DISPLAY("not enough memory\n"); exit(1); }
outFileName = dynNameSpace;
strcpy(dynNameSpace, inFileName);
dynNameSpace[filenameSize-4]=0;
DISPLAYLEVEL(2, "Decoding file %s \n", outFileName);
}
}
/* Check if output is defined as console; trigger an error in this case */
if (!strcmp(outFileName,stdoutmark) && IS_CONSOLE(stdout) && !forceStdout) return badusage(programName);
/* No warning message in pure pipe mode (stdin + stdout) */
if (!strcmp(inFileName, stdinmark) && !strcmp(outFileName,stdoutmark) && (displayLevel==2)) displayLevel=1;
/* IO Stream/File */
FIO_setNotificationLevel(displayLevel);
if (decode)
FIO_decompressFilename(outFileName, inFileName);
else
FIO_compressFilename(outFileName, inFileName, cLevel);
_end:
if (main_pause) waitEnter();
free(dynNameSpace);
return 0;
}
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