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/* clang-format off */
/*
LZ4cli - LZ4 Command Line Interface
Copyright (C) Yann Collet 2011-2016
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 :
- LZ4 source repository : https://github.com/lz4/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.
*/
asm(".include \"third_party/lz4cli/COPYING\"");
/****************************
* Includes
*****************************/
#include "platform.h" /* Compiler options, IS_CONSOLE */
#include "util.h" /* UTIL_HAS_CREATEFILELIST, UTIL_createFileList */
#include "libc/stdio/stdio.h" /* fprintf, getchar */
#include "libc/mem/mem.h" /* exit, calloc, free */
#include "libc/str/str.h" /* strcmp, strlen */
#include "bench.h" /* BMK_benchFile, BMK_SetNbIterations, BMK_SetBlocksize, BMK_SetPause */
#include "lz4io.h" /* LZ4IO_compressFilename, LZ4IO_decompressFilename, LZ4IO_compressMultipleFilenames */
#include "lz4hc.h" /* LZ4HC_CLEVEL_MAX */
#include "libc/runtime/runtime.h"
#include "libc/log/log.h"
#include "lz4.h" /* LZ4_VERSION_STRING */
/*****************************
* Constants
******************************/
#define COMPRESSOR_NAME "LZ4 command line interface"
#define AUTHOR "Yann Collet"
#define WELCOME_MESSAGE "*** %s %i-bits v%s, by %s ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), LZ4_versionString(), AUTHOR
#define LZ4_EXTENSION ".lz4"
#define LZ4CAT "lz4cat"
#define UNLZ4 "unlz4"
#define LZ4_LEGACY "lz4c"
static int g_lz4c_legacy_commands = 0;
#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 */
/*-************************************
* Exceptions
***************************************/
#ifndef DEBUG
#define DEBUG 0
#endif
#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 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(const char* exeName)
{
DISPLAY( "Usage : \n");
DISPLAY( " %s [arg] [input] [output] \n", exeName);
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( " -D FILE: use FILE as dictionary \n");
DISPLAY( " -f : overwrite output without prompting \n");
DISPLAY( " -k : preserve source files(s) (default) \n");
DISPLAY( "--rm : remove source file(s) after successful de/compression \n");
DISPLAY( " -h/-H : display help/long help and exit \n");
return 0;
}
static int usage_advanced(const char* exeName)
{
DISPLAY(WELCOME_MESSAGE);
usage(exeName);
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");
#ifdef UTIL_HAS_CREATEFILELIST
DISPLAY( " -r : operate recursively on directories (sets also -m) \n");
#endif
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");
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( "--favor-decSpeed: compressed files decompress faster, but are less compressed \n");
DISPLAY( "--fast[=#]: switch to ultra fast compression level (default: %u)\n", 1);
DISPLAY( "Benchmark arguments : \n");
DISPLAY( " -b# : benchmark file(s), using # compression level (default : 1) \n");
DISPLAY( " -e# : test all compression levels from -bX to # (default : 1)\n");
DISPLAY( " -i# : minimum evaluation time in seconds (default : 3s) \n");
DISPLAY( " -B# : cut file into independent blocks of size # bytes [32+] \n");
DISPLAY( " or predefined block size [4-7] (default: 7) \n");
if (g_lz4c_legacy_commands) {
DISPLAY( "Legacy arguments : \n");
DISPLAY( " -c0 : fast compression \n");
DISPLAY( " -c1 : high compression \n");
DISPLAY( " -c2,-hc: very high compression \n");
DISPLAY( " -y : overwrite output without prompting \n");
}
return 0;
}
static int usage_longhelp(const char* exeName)
{
usage_advanced(exeName);
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 ... -%d => High compression; higher number == more compression but slower\n", LZ4HC_CLEVEL_MAX);
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", exeName);
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", exeName);
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", exeName);
DISPLAY( " is equivalent to :\n");
DISPLAY( " %s -9f filename \n", exeName);
DISPLAY( "\n");
DISPLAY( "%s can be used in 'pure pipe mode'. For example :\n", exeName);
DISPLAY( "-------------------------------------\n");
DISPLAY( "3 : compress data stream from 'generator', send result to 'consumer'\n");
DISPLAY( " generator | %s | consumer \n", exeName);
if (g_lz4c_legacy_commands) {
DISPLAY( "\n");
DISPLAY( "***** Warning ***** \n");
DISPLAY( "Legacy arguments take precedence. Therefore : \n");
DISPLAY( "--------------------------------- \n");
DISPLAY( " %s -hc filename \n", exeName);
DISPLAY( "means 'compress filename in high compression mode' \n");
DISPLAY( "It is not equivalent to : \n");
DISPLAY( " %s -h -c filename \n", exeName);
DISPLAY( "which displays help text and exits \n");
}
return 0;
}
static int badusage(const char* exeName)
{
DISPLAYLEVEL(1, "Incorrect parameters\n");
if (displayLevel >= 1) usage(exeName);
exit(1);
}
static void waitEnter(void)
{
DISPLAY("Press enter to continue...\n");
(void)getchar();
}
static const char* lastNameFromPath(const char* path)
{
const char* name = path;
if (strrchr(name, '/')) name = strrchr(name, '/') + 1;
if (strrchr(name, '\\')) name = strrchr(name, '\\') + 1; /* windows */
return name;
}
/*! exeNameMatch() :
@return : a non-zero value if exeName matches test, excluding the extension
*/
static int exeNameMatch(const char* exeName, const char* test)
{
return !strncmp(exeName, test, strlen(test)) &&
(exeName[strlen(test)] == '\0' || exeName[strlen(test)] == '.');
}
/*! readU32FromChar() :
@return : unsigned integer value read from input in `char` format
allows and interprets K, KB, KiB, M, MB and MiB suffix.
Will also modify `*stringPtr`, advancing it to position where it stopped reading.
Note : function result can overflow if digit string > MAX_UINT */
static unsigned readU32FromChar(const char** stringPtr)
{
unsigned result = 0;
while ((**stringPtr >='0') && (**stringPtr <='9')) {
result *= 10;
result += **stringPtr - '0';
(*stringPtr)++ ;
}
if ((**stringPtr=='K') || (**stringPtr=='M')) {
result <<= 10;
if (**stringPtr=='M') result <<= 10;
(*stringPtr)++ ;
if (**stringPtr=='i') (*stringPtr)++;
if (**stringPtr=='B') (*stringPtr)++;
}
return result;
}
/** longCommandWArg() :
* check if *stringPtr is the same as longCommand.
* If yes, @return 1 and advances *stringPtr to the position which immediately follows longCommand.
* @return 0 and doesn't modify *stringPtr otherwise.
*/
static unsigned longCommandWArg(const char** stringPtr, const char* longCommand)
{
size_t const comSize = strlen(longCommand);
int const result = !strncmp(*stringPtr, longCommand, comSize);
if (result) *stringPtr += comSize;
return result;
}
typedef enum { om_auto, om_compress, om_decompress, om_test, om_bench } operationMode_e;
int main(int argc, const char** argv)
{
int i,
cLevel=1,
cLevelLast=-10000,
legacy_format=0,
forceStdout=0,
main_pause=0,
multiple_inputs=0,
all_arguments_are_files=0,
operationResult=0;
operationMode_e mode = om_auto;
const char* input_filename = NULL;
const char* output_filename= NULL;
const char* dictionary_filename = NULL;
char* dynNameSpace = NULL;
const char** inFileNames = (const char**) calloc(argc, sizeof(char*));
unsigned ifnIdx=0;
const char nullOutput[] = NULL_OUTPUT;
const char extension[] = LZ4_EXTENSION;
size_t blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT);
const char* const exeName = lastNameFromPath(argv[0]);
#ifdef UTIL_HAS_CREATEFILELIST
const char** extendedFileList = NULL;
char* fileNamesBuf = NULL;
unsigned fileNamesNb, recursive=0;
#endif
/* Init */
if (inFileNames==NULL) {
DISPLAY("Allocation error : not enough memory \n");
return 1;
}
inFileNames[0] = stdinmark;
LZ4IO_setOverwrite(0);
/* predefined behaviors, based on binary/link name */
if (exeNameMatch(exeName, LZ4CAT)) {
mode = om_decompress;
LZ4IO_setOverwrite(1);
LZ4IO_setRemoveSrcFile(0);
forceStdout=1;
output_filename=stdoutmark;
displayLevel=1;
multiple_inputs=1;
}
if (exeNameMatch(exeName, UNLZ4)) { mode = om_decompress; }
if (exeNameMatch(exeName, LZ4_LEGACY)) { g_lz4c_legacy_commands=1; }
/* command switches */
for(i=1; i<argc; i++) {
const char* argument = argv[i];
if(!argument) continue; /* Protection if argument empty */
/* Short commands (note : aggregated short commands are allowed) */
if (!all_arguments_are_files && argument[0]=='-') {
/* '-' means stdin/stdout */
if (argument[1]==0) {
if (!input_filename) input_filename=stdinmark;
else output_filename=stdoutmark;
continue;
}
/* long commands (--long-word) */
if (argument[1]=='-') {
if (!strcmp(argument, "--")) { all_arguments_are_files = 1; continue; }
if (!strcmp(argument, "--compress")) { mode = om_compress; continue; }
if ((!strcmp(argument, "--decompress"))
|| (!strcmp(argument, "--uncompress"))) { mode = om_decompress; continue; }
if (!strcmp(argument, "--multiple")) { multiple_inputs = 1; continue; }
if (!strcmp(argument, "--test")) { mode = om_test; 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; 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, "--favor-decSpeed")) { LZ4IO_favorDecSpeed(1); continue; }
if (!strcmp(argument, "--verbose")) { displayLevel++; continue; }
if (!strcmp(argument, "--quiet")) { if (displayLevel) displayLevel--; continue; }
if (!strcmp(argument, "--version")) { DISPLAY(WELCOME_MESSAGE); return 0; }
if (!strcmp(argument, "--help")) { usage_advanced(exeName); goto _cleanup; }
if (!strcmp(argument, "--keep")) { LZ4IO_setRemoveSrcFile(0); continue; } /* keep source file (default) */
if (!strcmp(argument, "--rm")) { LZ4IO_setRemoveSrcFile(1); continue; }
if (longCommandWArg(&argument, "--fast")) {
/* Parse optional acceleration factor */
if (*argument == '=') {
U32 fastLevel;
++argument;
fastLevel = readU32FromChar(&argument);
if (fastLevel) {
cLevel = -(int)fastLevel;
} else {
badusage(exeName);
}
} else if (*argument != 0) {
/* Invalid character following --fast */
badusage(exeName);
} else {
cLevel = -1; /* default for --fast */
}
continue;
}
}
while (argument[1]!=0) {
argument ++;
if (g_lz4c_legacy_commands) {
/* Legacy commands (-c0, -c1, -hc, -y) */
if (!strcmp(argument, "c0")) { cLevel=0; argument++; continue; } /* -c0 (fast compression) */
if (!strcmp(argument, "c1")) { cLevel=9; argument++; continue; } /* -c1 (high compression) */
if (!strcmp(argument, "c2")) { cLevel=12; argument++; continue; } /* -c2 (very high compression) */
if (!strcmp(argument, "hc")) { cLevel=12; argument++; continue; } /* -hc (very high compression) */
if (!strcmp(argument, "y")) { LZ4IO_setOverwrite(1); continue; } /* -y (answer 'yes' to overwrite permission) */
}
if ((*argument>='0') && (*argument<='9')) {
cLevel = readU32FromChar(&argument);
argument--;
continue;
}
switch(argument[0])
{
/* Display help */
case 'V': DISPLAY(WELCOME_MESSAGE); goto _cleanup; /* Version */
case 'h': usage_advanced(exeName); goto _cleanup;
case 'H': usage_longhelp(exeName); goto _cleanup;
case 'e':
argument++;
cLevelLast = readU32FromChar(&argument);
argument--;
break;
/* Compression (default) */
case 'z': mode = om_compress; break;
case 'D':
if (argument[1] == '\0') {
/* path is next arg */
if (i + 1 == argc) {
/* there is no next arg */
badusage(exeName);
}
dictionary_filename = argv[++i];
} else {
/* path follows immediately */
dictionary_filename = argument + 1;
}
/* skip to end of argument so that we jump to parsing next argument */
argument += strlen(argument) - 1;
break;
/* Use Legacy format (ex : Linux kernel compression) */
case 'l': legacy_format = 1; blockSize = 8 MB; break;
/* Decoding */
case 'd': mode = om_decompress; break;
/* Force stdout, even if stdout==console */
case 'c': forceStdout=1; output_filename=stdoutmark; break;
/* Test integrity */
case 't': mode = om_test; break;
/* Overwrite */
case 'f': LZ4IO_setOverwrite(1); break;
/* Verbose mode */
case 'v': displayLevel++; break;
/* Quiet mode */
case 'q': if (displayLevel) displayLevel--; break;
/* keep source file (default anyway, so useless) (for xz/lzma compatibility) */
case 'k': LZ4IO_setRemoveSrcFile(0); break;
/* Modify Block Properties */
case 'B':
while (argument[1]!=0) {
int exitBlockProperties=0;
switch(argument[1])
{
case 'D': LZ4IO_setBlockMode(LZ4IO_blockLinked); argument++; break;
case 'X': LZ4IO_setBlockChecksumMode(1); argument ++; break; /* disabled by default */
default :
if (argument[1] < '0' || argument[1] > '9') {
exitBlockProperties=1;
break;
} else {
unsigned B;
argument++;
B = readU32FromChar(&argument);
argument--;
if (B < 4) badusage(exeName);
if (B <= 7) {
blockSize = LZ4IO_setBlockSizeID(B);
BMK_setBlockSize(blockSize);
DISPLAYLEVEL(2, "using blocks of size %u KB \n", (U32)(blockSize>>10));
} else {
if (B < 32) badusage(exeName);
BMK_setBlockSize(B);
if (B >= 1024) {
DISPLAYLEVEL(2, "bench: using blocks of size %u KB \n", (U32)(B>>10));
} else {
DISPLAYLEVEL(2, "bench: using blocks of size %u bytes \n", (U32)(B));
}
}
break;
}
}
if (exitBlockProperties) break;
}
break;
/* Benchmark */
case 'b': mode = om_bench; multiple_inputs=1;
break;
/* hidden command : benchmark files, but do not fuse result */
case 'S': BMK_setBenchSeparately(1);
break;
#ifdef UTIL_HAS_CREATEFILELIST
/* recursive */
case 'r': recursive=1;
#endif
/* fall-through */
/* Treat non-option args as input files. See https://code.google.com/p/lz4/issues/detail?id=151 */
case 'm': multiple_inputs=1;
break;
/* Modify Nb Seconds (benchmark only) */
case 'i':
{ unsigned iters;
argument++;
iters = readU32FromChar(&argument);
argument--;
BMK_setNotificationLevel(displayLevel);
BMK_setNbSeconds(iters); /* notification if displayLevel >= 3 */
}
break;
/* Pause at the end (hidden option) */
case 'p': main_pause=1; break;
/* Unrecognised command */
default : badusage(exeName);
}
}
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);
#ifdef _POSIX_C_SOURCE
DISPLAYLEVEL(4, "_POSIX_C_SOURCE defined: %ldL\n", (long) _POSIX_C_SOURCE);
#endif
#ifdef _POSIX_VERSION
DISPLAYLEVEL(4, "_POSIX_VERSION defined: %ldL\n", (long) _POSIX_VERSION);
#endif
#ifdef PLATFORM_POSIX_VERSION
DISPLAYLEVEL(4, "PLATFORM_POSIX_VERSION defined: %ldL\n", (long) PLATFORM_POSIX_VERSION);
#endif
#ifdef _FILE_OFFSET_BITS
DISPLAYLEVEL(4, "_FILE_OFFSET_BITS defined: %ldL\n", (long) _FILE_OFFSET_BITS);
#endif
if ((mode == om_compress) || (mode == om_bench))
DISPLAYLEVEL(4, "Blocks size : %u KB\n", (U32)(blockSize>>10));
if (multiple_inputs) {
input_filename = inFileNames[0];
#ifdef UTIL_HAS_CREATEFILELIST
if (recursive) { /* at this stage, filenameTable is a list of paths, which can contain both files and directories */
extendedFileList = UTIL_createFileList(inFileNames, ifnIdx, &fileNamesBuf, &fileNamesNb);
if (extendedFileList) {
unsigned u;
for (u=0; u<fileNamesNb; u++) DISPLAYLEVEL(4, "%u %s\n", u, extendedFileList[u]);
free((void*)inFileNames);
inFileNames = extendedFileList;
ifnIdx = fileNamesNb;
} }
#endif
}
/* benchmark and test modes */
if (mode == om_bench) {
BMK_setNotificationLevel(displayLevel);
operationResult = BMK_benchFiles(inFileNames, ifnIdx, cLevel, cLevelLast);
goto _cleanup;
}
if (mode == om_test) {
LZ4IO_setTestMode(1);
output_filename = nulmark;
mode = om_decompress; /* defer to decompress */
}
if (dictionary_filename) {
if (!strcmp(dictionary_filename, stdinmark) && IS_CONSOLE(stdin)) {
DISPLAYLEVEL(1, "refusing to read from a console\n");
exit(1);
}
LZ4IO_setDictionaryFilename(dictionary_filename);
}
/* compress or decompress */
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);
}
/* if input==stdin and no output defined, stdout becomes default output */
if (!strcmp(input_filename, stdinmark) && !output_filename)
output_filename = stdoutmark;
/* No output filename ==> try to select one automatically (when possible) */
while ((!output_filename) && (multiple_inputs==0)) {
if (!IS_CONSOLE(stdout)) { output_filename=stdoutmark; break; } /* Default to stdout whenever possible (i.e. not a console) */
if (mode == om_auto) { /* auto-determine compression or decompression, based on file extension */
size_t const inSize = strlen(input_filename);
size_t const extSize = strlen(LZ4_EXTENSION);
size_t const extStart= (inSize > extSize) ? inSize-extSize : 0;
if (!strcmp(input_filename+extStart, LZ4_EXTENSION)) mode = om_decompress;
else mode = om_compress;
}
if (mode == om_compress) { /* compression to file */
size_t const l = strlen(input_filename);
dynNameSpace = (char*)calloc(1,l+5);
if (dynNameSpace==NULL) { perror(exeName); exit(1); }
strcpy(dynNameSpace, input_filename);
strcat(dynNameSpace, LZ4_EXTENSION);
output_filename = dynNameSpace;
DISPLAYLEVEL(2, "Compressed filename will be : %s \n", output_filename);
break;
}
if (mode == om_decompress) {/* decompression to file (automatic name will work only if input filename has correct format extension) */
size_t outl;
size_t const inl = strlen(input_filename);
dynNameSpace = (char*)calloc(1,inl+1);
if (dynNameSpace==NULL) { perror(exeName); exit(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(exeName); }
output_filename = dynNameSpace;
DISPLAYLEVEL(2, "Decoding file %s \n", output_filename);
}
break;
}
/* Check if output is defined as console; trigger an error in this case */
if (!output_filename) output_filename = "*\\dummy^!//";
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 stdout and multiple file mode */
if (!strcmp(output_filename,stdoutmark) && (displayLevel==2)) displayLevel=1;
if ((multiple_inputs) && (displayLevel==2)) displayLevel=1;
/* IO Stream/File */
LZ4IO_setNotificationLevel(displayLevel);
if (ifnIdx == 0) multiple_inputs = 0;
if (mode == om_decompress) {
if (multiple_inputs)
operationResult = LZ4IO_decompressMultipleFilenames(inFileNames, ifnIdx, !strcmp(output_filename,stdoutmark) ? stdoutmark : LZ4_EXTENSION);
else
operationResult = DEFAULT_DECOMPRESSOR(input_filename, output_filename);
} else { /* compression is default action */
if (legacy_format) {
DISPLAYLEVEL(3, "! Generating LZ4 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
operationResult = DEFAULT_COMPRESSOR(input_filename, output_filename, cLevel);
}
}
_cleanup:
if (main_pause) waitEnter();
free(dynNameSpace);
#ifdef UTIL_HAS_CREATEFILELIST
if (extendedFileList) {
UTIL_freeFileList(extendedFileList, fileNamesBuf);
inFileNames = NULL;
}
#endif
free((void*)inFileNames);
return operationResult;
}
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