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lz4/programs/lz4cli.c
Yann Collet 3c03326004 minor refactoring (coding style)
2016-06-29 12:54:23 +02:00

570 lines
23 KiB
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/*
LZ4cli - LZ4 Command Line Interface
Copyright (C) Yann Collet 2011-2015
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 :
- LZ4 source repository : https://github.com/Cyan4973/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/*
Note : this is stand-alone program.
It is not part of LZ4 compression library, it is a user program of the LZ4 library.
The license of LZ4 library is BSD.
The license of xxHash library is BSD.
The license of this compression CLI program is GPLv2.
*/
/**************************************
* Tuning parameters
***************************************/
/* ENABLE_LZ4C_LEGACY_OPTIONS :
Control the availability of -c0, -c1 and -hc legacy arguments
Default : Legacy options are disabled */
/* #define ENABLE_LZ4C_LEGACY_OPTIONS */
/**************************************
* Compiler Options
***************************************/
/* Disable some Visual warning messages */
#ifdef _MSC_VER
# define _CRT_SECURE_NO_WARNINGS
# define _CRT_SECURE_NO_DEPRECATE /* VS2005 */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
#endif
#define _POSIX_SOURCE 1 /* for 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_benchFile, BMK_SetNbIterations, BMK_SetBlocksize, BMK_SetPause */
#include "lz4io.h" /* LZ4IO_compressFilename, LZ4IO_decompressFilename, LZ4IO_compressMultipleFilenames */
/****************************
* OS-specific Includes
*****************************/
#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32)
# include <io.h> /* _isatty */
# if defined(__DJGPP__)
# include <unistd.h>
# define _isatty isatty
# define _fileno fileno
# endif
# ifdef __MINGW32__
int _fileno(FILE *stream); /* MINGW somehow forgets to include this prototype into <stdio.h> */
# endif
# define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
#else
# include <unistd.h> /* isatty */
# define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
#endif
/*****************************
* Constants
******************************/
#define COMPRESSOR_NAME "LZ4 command line interface"
#ifndef LZ4_VERSION
# define LZ4_VERSION "r128"
#endif
#define AUTHOR "Yann Collet"
#define WELCOME_MESSAGE "*** %s %i-bits %s, by %s (%s) ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), LZ4_VERSION, AUTHOR, __DATE__
#define LZ4_EXTENSION ".lz4"
#define LZ4CAT "lz4cat"
#define UNLZ4 "unlz4"
#define KB *(1U<<10)
#define MB *(1U<<20)
#define GB *(1U<<30)
#define LZ4_BLOCKSIZEID_DEFAULT 7
/*-************************************
* Macros
***************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static unsigned displayLevel = 2; /* 0 : no display ; 1: errors only ; 2 : downgradable normal ; 3 : non-downgradable normal; 4 : + information */
/*-************************************
* Local Variables
***************************************/
static const char* programName;
/*-************************************
* 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); \
}
/*-************************************
* Version modifiers
***************************************/
#define EXTENDED_ARGUMENTS
#define EXTENDED_HELP
#define EXTENDED_FORMAT
#define DEFAULT_COMPRESSOR LZ4IO_compressFilename
#define DEFAULT_DECOMPRESSOR LZ4IO_decompressFilename
int LZ4IO_compressFilename_Legacy(const char* input_filename, const char* output_filename, int compressionlevel); /* hidden function */
/*-***************************
* Functions
*****************************/
static int usage(void)
{
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 - or %s, read standard input\n", stdinmark);
DISPLAY( "Arguments :\n");
DISPLAY( " -1 : Fast compression (default) \n");
DISPLAY( " -9 : High compression \n");
DISPLAY( " -d : decompression (default for %s extension)\n", LZ4_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(void)
{
DISPLAY(WELCOME_MESSAGE);
usage();
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( " -m : multiple input files (implies automatic output filenames)\n");
DISPLAY( " -l : compress using Legacy format (Linux kernel compression)\n");
DISPLAY( " -B# : Block size [4-7](default : 7)\n");
DISPLAY( " -BD : Block dependency (improve compression ratio)\n");
/* DISPLAY( " -BX : enable block checksum (default:disabled)\n"); *//* Option currently inactive */
DISPLAY( "--no-frame-crc : disable stream checksum (default:enabled)\n");
DISPLAY( "--content-size : compressed frame includes original size (default:not present)\n");
DISPLAY( "--[no-]sparse : sparse mode (default:enabled on file, disabled on stdout)\n");
DISPLAY( "Benchmark arguments :\n");
DISPLAY( " -b : benchmark file(s)\n");
DISPLAY( " -i# : iteration loops [1-9](default : 3), benchmark mode only\n");
#if defined(ENABLE_LZ4C_LEGACY_OPTIONS)
DISPLAY( "Legacy arguments :\n");
DISPLAY( " -c0 : fast compression\n");
DISPLAY( " -c1 : high compression\n");
DISPLAY( " -hc : high compression\n");
DISPLAY( " -y : overwrite output without prompting \n");
#endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
EXTENDED_HELP;
return 0;
}
static int usage_longhelp(void)
{
usage_advanced();
DISPLAY( "\n");
DISPLAY( "****************************\n");
DISPLAY( "***** Advanced comment *****\n");
DISPLAY( "****************************\n");
DISPLAY( "\n");
DISPLAY( "Which values can [output] have ? \n");
DISPLAY( "---------------------------------\n");
DISPLAY( "[output] : a filename \n");
DISPLAY( " '%s', or '-' for standard output (pipe mode)\n", stdoutmark);
DISPLAY( " '%s' to discard output (test mode) \n", NULL_OUTPUT);
DISPLAY( "[output] can be left empty. In this case, it receives the following value :\n");
DISPLAY( " - if stdout is not the console, then [output] = stdout \n");
DISPLAY( " - if stdout is console : \n");
DISPLAY( " + for compression, output to filename%s \n", LZ4_EXTENSION);
DISPLAY( " + for decompression, output to filename without '%s'\n", LZ4_EXTENSION);
DISPLAY( " > if input filename has no '%s' extension : error \n", LZ4_EXTENSION);
DISPLAY( "\n");
DISPLAY( "Compression levels : \n");
DISPLAY( "---------------------\n");
DISPLAY( "-0 ... -2 => Fast compression, all identicals\n");
DISPLAY( "-3 ... -16 => High compression; higher number == more compression but slower\n");
DISPLAY( "\n");
DISPLAY( "stdin, stdout and the console : \n");
DISPLAY( "--------------------------------\n");
DISPLAY( "To protect the console from binary flooding (bad argument mistake)\n");
DISPLAY( "%s will refuse to read from console, or write to console \n", programName);
DISPLAY( "except if '-c' command is specified, to force output to console \n");
DISPLAY( "\n");
DISPLAY( "Simple example :\n");
DISPLAY( "----------------\n");
DISPLAY( "1 : compress 'filename' fast, using default output name 'filename.lz4'\n");
DISPLAY( " %s filename\n", programName);
DISPLAY( "\n");
DISPLAY( "Short arguments can be aggregated. For example :\n");
DISPLAY( "----------------------------------\n");
DISPLAY( "2 : compress 'filename' in high compression mode, overwrite output if exists\n");
DISPLAY( " %s -9 -f filename \n", programName);
DISPLAY( " is equivalent to :\n");
DISPLAY( " %s -9f filename \n", programName);
DISPLAY( "\n");
DISPLAY( "%s can be used in 'pure pipe mode'. For example :\n", programName);
DISPLAY( "-------------------------------------\n");
DISPLAY( "3 : compress data stream from 'generator', send result to 'consumer'\n");
DISPLAY( " generator | %s | consumer \n", programName);
#if defined(ENABLE_LZ4C_LEGACY_OPTIONS)
DISPLAY( "\n");
DISPLAY( "***** Warning *****\n");
DISPLAY( "Legacy arguments take precedence. Therefore : \n");
DISPLAY( "---------------------------------\n");
DISPLAY( " %s -hc filename\n", programName);
DISPLAY( "means 'compress filename in high compression mode'\n");
DISPLAY( "It is not equivalent to :\n");
DISPLAY( " %s -h -c filename\n", programName);
DISPLAY( "which would display help text and exit\n");
#endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
return 0;
}
static int badusage(void)
{
DISPLAYLEVEL(1, "Incorrect parameters\n");
if (displayLevel >= 1) usage();
exit(1);
}
static void waitEnter(void)
{
DISPLAY("Press enter to continue...\n");
(void)getchar();
}
int main(int argc, const char** argv)
{
int i,
cLevel=0,
decode=0,
bench=0,
legacy_format=0,
forceStdout=0,
forceCompress=0,
main_pause=0,
multiple_inputs=0,
operationResult=0;
const char* input_filename=0;
const char* output_filename=0;
char* dynNameSpace=0;
const char** inFileNames = NULL;
unsigned ifnIdx=0;
char nullOutput[] = NULL_OUTPUT;
char extension[] = LZ4_EXTENSION;
int blockSize;
/* Init */
programName = argv[0];
LZ4IO_setOverwrite(0);
blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT);
/* lz4cat predefined behavior */
if (!strcmp(programName, LZ4CAT)) { decode=1; forceStdout=1; output_filename=stdoutmark; displayLevel=1; }
if (!strcmp(programName, UNLZ4)) { decode=1; }
/* command switches */
for(i=1; i<argc; i++) {
const char* argument = argv[i];
if(!argument) continue; /* Protection if argument empty */
/* long commands (--long-word) */
if (!strcmp(argument, "--compress")) { forceCompress = 1; continue; }
if ((!strcmp(argument, "--decompress"))
|| (!strcmp(argument, "--uncompress"))) { decode = 1; continue; }
if (!strcmp(argument, "--multiple")) { multiple_inputs = 1; if (inFileNames==NULL) inFileNames = (const char**)malloc(argc * sizeof(char*)); continue; }
if (!strcmp(argument, "--test")) { decode = 1; LZ4IO_setOverwrite(1); output_filename=nulmark; continue; }
if (!strcmp(argument, "--force")) { LZ4IO_setOverwrite(1); continue; }
if (!strcmp(argument, "--no-force")) { LZ4IO_setOverwrite(0); continue; }
if ((!strcmp(argument, "--stdout"))
|| (!strcmp(argument, "--to-stdout"))) { forceStdout=1; output_filename=stdoutmark; displayLevel=1; continue; }
if (!strcmp(argument, "--frame-crc")) { LZ4IO_setStreamChecksumMode(1); continue; }
if (!strcmp(argument, "--no-frame-crc")) { LZ4IO_setStreamChecksumMode(0); continue; }
if (!strcmp(argument, "--content-size")) { LZ4IO_setContentSize(1); continue; }
if (!strcmp(argument, "--no-content-size")) { LZ4IO_setContentSize(0); continue; }
if (!strcmp(argument, "--sparse")) { LZ4IO_setSparseFile(2); continue; }
if (!strcmp(argument, "--no-sparse")) { LZ4IO_setSparseFile(0); continue; }
if (!strcmp(argument, "--verbose")) { displayLevel=4; continue; }
if (!strcmp(argument, "--quiet")) { if (displayLevel) displayLevel--; continue; }
if (!strcmp(argument, "--version")) { DISPLAY(WELCOME_MESSAGE); return 0; }
if (!strcmp(argument, "--keep")) { continue; } /* keep source file (default anyway; just for xz/lzma compatibility) */
/* Short commands (note : aggregated short commands are allowed) */
if (argument[0]=='-') {
/* '-' means stdin/stdout */
if (argument[1]==0) {
if (!input_filename) input_filename=stdinmark;
else output_filename=stdoutmark;
}
while (argument[1]!=0) {
argument ++;
#if defined(ENABLE_LZ4C_LEGACY_OPTIONS)
/* Legacy arguments (-c0, -c1, -hc, -y, -s) */
if ((argument[0]=='c') && (argument[1]=='0')) { cLevel=0; argument++; continue; } /* -c0 (fast compression) */
if ((argument[0]=='c') && (argument[1]=='1')) { cLevel=9; argument++; continue; } /* -c1 (high compression) */
if ((argument[0]=='h') && (argument[1]=='c')) { cLevel=9; argument++; continue; } /* -hc (high compression) */
if (*argument=='y') { LZ4IO_setOverwrite(1); continue; } /* -y (answer 'yes' to overwrite permission) */
#endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
if ((*argument>='0') && (*argument<='9')) {
cLevel = 0;
while ((*argument >= '0') && (*argument <= '9')) {
cLevel *= 10;
cLevel += *argument - '0';
argument++;
}
argument--;
continue;
}
switch(argument[0])
{
/* Display help */
case 'V': DISPLAY(WELCOME_MESSAGE); goto _cleanup; /* Version */
case 'h': usage_advanced(); goto _cleanup;
case 'H': usage_longhelp(); goto _cleanup;
/* Compression (default) */
case 'z': forceCompress = 1; break;
/* Use Legacy format (ex : Linux kernel compression) */
case 'l': legacy_format = 1; blockSize = 8 MB; break;
/* Decoding */
case 'd': decode=1; break;
/* Force stdout, even if stdout==console */
case 'c': forceStdout=1; output_filename=stdoutmark; displayLevel=1; break;
/* Test integrity */
case 't': decode=1; LZ4IO_setOverwrite(1); output_filename=nulmark; break;
/* Overwrite */
case 'f': LZ4IO_setOverwrite(1); break;
/* Verbose mode */
case 'v': displayLevel=4; break;
/* Quiet mode */
case 'q': if (displayLevel) displayLevel--; break;
/* keep source file (default anyway, so useless) (for xz/lzma compatibility) */
case 'k': break;
/* Modify Block Properties */
case 'B':
while (argument[1]!=0)
{
int exitBlockProperties=0;
switch(argument[1])
{
case '4':
case '5':
case '6':
case '7':
{ int B = argument[1] - '0';
blockSize = LZ4IO_setBlockSizeID(B);
BMK_setBlocksize(blockSize);
argument++;
break;
}
case 'D': LZ4IO_setBlockMode(LZ4IO_blockLinked); argument++; break;
case 'X': LZ4IO_setBlockChecksumMode(1); argument ++; break; /* currently disabled */
default : exitBlockProperties=1;
}
if (exitBlockProperties) break;
}
break;
/* Benchmark */
case 'b': bench=1; multiple_inputs=1;
if (inFileNames == NULL)
inFileNames = (const char**) malloc(argc * sizeof(char*));
break;
/* Treat non-option args as input files. See https://code.google.com/p/lz4/issues/detail?id=151 */
case 'm': multiple_inputs=1;
if (inFileNames == NULL)
inFileNames = (const char**) malloc(argc * sizeof(char*));
break;
/* Modify Nb Iterations (benchmark only) */
case 'i':
{ unsigned iters = 0;
while ((argument[1] >='0') && (argument[1] <='9'))
{
iters *= 10;
iters += argument[1] - '0';
argument++;
}
BMK_setNbIterations(iters);
}
break;
/* Pause at the end (hidden option) */
case 'p': main_pause=1; BMK_setPause(); break;
/* Specific commands for customized versions */
EXTENDED_ARGUMENTS;
/* Unrecognised command */
default : badusage();
}
}
continue;
}
/* Store in *inFileNames[] if -m is used. */
if (multiple_inputs) { inFileNames[ifnIdx++]=argument; continue; }
/* Store first non-option arg in input_filename to preserve original cli logic. */
if (!input_filename) { input_filename=argument; continue; }
/* Second non-option arg in output_filename to preserve original cli logic. */
if (!output_filename)
{
output_filename=argument;
if (!strcmp (output_filename, nullOutput)) output_filename = nulmark;
continue;
}
/* 3rd non-option arg should not exist */
DISPLAYLEVEL(1, "Warning : %s won't be used ! Do you want multiple input files (-m) ? \n", argument);
}
DISPLAYLEVEL(3, WELCOME_MESSAGE);
if (!decode) DISPLAYLEVEL(4, "Blocks size : %i KB\n", blockSize>>10);
/* No input filename ==> use stdin */
if (multiple_inputs) input_filename = inFileNames[0], output_filename = (const char*)(inFileNames[0]);
if(!input_filename) { input_filename=stdinmark; }
/* Check if input is defined as console; trigger an error in this case */
if (!strcmp(input_filename, stdinmark) && IS_CONSOLE(stdin) )
{
DISPLAYLEVEL(1, "refusing to read from a console\n");
exit(1);
}
/* Check if benchmark is selected */
if (bench)
{
int bmkResult = BMK_benchFiles(inFileNames, ifnIdx, cLevel);
free((void*)inFileNames);
return bmkResult;
}
/* No output filename ==> try to select one automatically (when possible) */
while (!output_filename)
{
if (!IS_CONSOLE(stdout)) { output_filename=stdoutmark; break; } /* Default to stdout whenever possible (i.e. not a console) */
if ((!decode) && !(forceCompress)) /* auto-determine compression or decompression, based on file extension */
{
size_t const l = strlen(input_filename);
if (!strcmp(input_filename+(l-4), LZ4_EXTENSION)) decode=1;
}
if (!decode) /* compression to file */
{
size_t const l = strlen(input_filename);
dynNameSpace = (char*)calloc(1,l+5);
if (dynNameSpace==NULL) exit(1);
strcpy(dynNameSpace, input_filename);
strcat(dynNameSpace, LZ4_EXTENSION);
output_filename = dynNameSpace;
DISPLAYLEVEL(2, "Compressed filename will be : %s \n", output_filename);
break;
}
/* decompression to file (automatic name will work only if input filename has correct format extension) */
{
size_t outl;
size_t inl = strlen(input_filename);
dynNameSpace = (char*)calloc(1,inl+1);
strcpy(dynNameSpace, input_filename);
outl = inl;
if (inl>4)
while ((outl >= inl-4) && (input_filename[outl] == extension[outl-inl+4])) dynNameSpace[outl--]=0;
if (outl != inl-5) { DISPLAYLEVEL(1, "Cannot determine an output filename\n"); badusage(); }
output_filename = dynNameSpace;
DISPLAYLEVEL(2, "Decoding file %s \n", output_filename);
}
}
/* Check if output is defined as console; trigger an error in this case */
if (!strcmp(output_filename,stdoutmark) && IS_CONSOLE(stdout) && !forceStdout) {
DISPLAYLEVEL(1, "refusing to write to console without -c\n");
exit(1);
}
/* Downgrade notification level in pure pipe mode (stdin + stdout) and multiple file mode */
if (!strcmp(input_filename, stdinmark) && !strcmp(output_filename,stdoutmark) && (displayLevel==2)) displayLevel=1;
if ((multiple_inputs) && (displayLevel==2)) displayLevel=1;
/* IO Stream/File */
LZ4IO_setNotificationLevel(displayLevel);
if (decode) {
if (multiple_inputs)
operationResult = LZ4IO_decompressMultipleFilenames(inFileNames, ifnIdx, LZ4_EXTENSION);
else
DEFAULT_DECOMPRESSOR(input_filename, output_filename);
} else {
/* compression is default action */
if (legacy_format) {
DISPLAYLEVEL(3, "! Generating compressed LZ4 using Legacy format (deprecated) ! \n");
LZ4IO_compressFilename_Legacy(input_filename, output_filename, cLevel);
} else {
if (multiple_inputs)
operationResult = LZ4IO_compressMultipleFilenames(inFileNames, ifnIdx, LZ4_EXTENSION, cLevel);
else
DEFAULT_COMPRESSOR(input_filename, output_filename, cLevel);
}
}
_cleanup:
if (main_pause) waitEnter();
free(dynNameSpace);
free((void*)inFileNames);
return operationResult;
}
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