1051 lines
35 KiB
C
1051 lines
35 KiB
C
/*
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LZ4io.c - LZ4 File/Stream Interface
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Copyright (C) Yann Collet 2011-2015
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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You can contact the author at :
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- LZ4 source repository : https://github.com/Cyan4973/lz4
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- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
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*/
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/*
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Note : this is stand-alone program.
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It is not part of LZ4 compression library, it is a user code of the LZ4 library.
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- The license of LZ4 library is BSD.
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- The license of xxHash library is BSD.
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- The license of this source file is GPLv2.
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*/
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/**************************************
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* Compiler Options
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**************************************/
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#ifdef _MSC_VER /* Visual Studio */
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# define _CRT_SECURE_NO_WARNINGS
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# define _CRT_SECURE_NO_DEPRECATE /* VS2005 */
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# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
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#endif
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#define _LARGE_FILES /* Large file support on 32-bits AIX */
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#define _FILE_OFFSET_BITS 64 /* Large file support on 32-bits unix */
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/*****************************
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* Includes
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*****************************/
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#include <stdio.h> /* fprintf, fopen, fread, stdin, stdout, fflush, getchar */
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#include <stdlib.h> /* malloc, free */
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#include <string.h> /* strcmp, strlen */
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#include <time.h> /* clock */
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#include <sys/types.h> /* stat64 */
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#include <sys/stat.h> /* stat64 */
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#include "lz4io.h"
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#include "lz4.h" /* still required for legacy format */
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#include "lz4hc.h" /* still required for legacy format */
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#include "lz4frame.h"
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/******************************
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* OS-specific Includes
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******************************/
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#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32)
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# include <fcntl.h> /* _O_BINARY */
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# include <io.h> /* _setmode, _fileno, _get_osfhandle */
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# if !defined(__DJGPP__)
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# define SET_BINARY_MODE(file) { int unused=_setmode(_fileno(file), _O_BINARY); (void)unused; }
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# include <Windows.h> /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */
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# define SET_SPARSE_FILE_MODE(file) { DWORD dw; DeviceIoControl((HANDLE) _get_osfhandle(_fileno(file)), FSCTL_SET_SPARSE, 0, 0, 0, 0, &dw, 0); }
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# if defined(_MSC_VER) && (_MSC_VER >= 1400) /* Avoid MSVC fseek()'s 2GiB barrier */
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# define fseek _fseeki64
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# endif
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# else
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# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
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# define SET_SPARSE_FILE_MODE(file)
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# endif
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#else
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# define SET_BINARY_MODE(file)
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# define SET_SPARSE_FILE_MODE(file)
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#endif
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#if !defined(S_ISREG)
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# define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
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#endif
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/*****************************
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* Constants
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*****************************/
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#define KB *(1 <<10)
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#define MB *(1 <<20)
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#define GB *(1U<<30)
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#define _1BIT 0x01
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#define _2BITS 0x03
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#define _3BITS 0x07
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#define _4BITS 0x0F
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#define _8BITS 0xFF
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#define MAGICNUMBER_SIZE 4
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#define LZ4IO_MAGICNUMBER 0x184D2204
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#define LZ4IO_SKIPPABLE0 0x184D2A50
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#define LZ4IO_SKIPPABLEMASK 0xFFFFFFF0
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#define LEGACY_MAGICNUMBER 0x184C2102
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#define CACHELINE 64
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#define LEGACY_BLOCKSIZE (8 MB)
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#define MIN_STREAM_BUFSIZE (192 KB)
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#define LZ4IO_BLOCKSIZEID_DEFAULT 7
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#define sizeT sizeof(size_t)
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#define maskT (sizeT - 1)
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/**************************************
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* Macros
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**************************************/
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#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
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#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
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static int g_displayLevel = 0; /* 0 : no display ; 1: errors ; 2 : + result + interaction + warnings ; 3 : + progression; 4 : + information */
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#define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
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if ((LZ4IO_GetMilliSpan(g_time) > refreshRate) || (g_displayLevel>=4)) \
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{ g_time = clock(); DISPLAY(__VA_ARGS__); \
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if (g_displayLevel>=4) fflush(stdout); } }
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static const unsigned refreshRate = 150;
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static clock_t g_time = 0;
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/**************************************
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* Local Parameters
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**************************************/
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static int g_overwrite = 1;
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static int g_blockSizeId = LZ4IO_BLOCKSIZEID_DEFAULT;
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static int g_blockChecksum = 0;
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static int g_streamChecksum = 1;
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static int g_blockIndependence = 1;
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static int g_sparseFileSupport = 1;
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static int g_contentSizeFlag = 0;
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static const int minBlockSizeID = 4;
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static const int maxBlockSizeID = 7;
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/**************************************
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* Exceptions
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***************************************/
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#define DEBUG 0
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#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
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#define EXM_THROW(error, ...) \
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{ \
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DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
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DISPLAYLEVEL(1, "Error %i : ", error); \
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DISPLAYLEVEL(1, __VA_ARGS__); \
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DISPLAYLEVEL(1, "\n"); \
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exit(error); \
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}
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/**************************************
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* Version modifiers
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**************************************/
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#define EXTENDED_ARGUMENTS
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#define EXTENDED_HELP
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#define EXTENDED_FORMAT
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#define DEFAULT_DECOMPRESSOR LZ4IO_decompressLZ4F
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/* ************************************************** */
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/* ****************** Parameters ******************** */
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/* ************************************************** */
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/* Default setting : overwrite = 1; return : overwrite mode (0/1) */
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int LZ4IO_setOverwrite(int yes)
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{
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g_overwrite = (yes!=0);
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return g_overwrite;
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}
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/* blockSizeID : valid values : 4-5-6-7 */
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int LZ4IO_setBlockSizeID(int bsid)
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{
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static const int blockSizeTable[] = { 64 KB, 256 KB, 1 MB, 4 MB };
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if ((bsid < minBlockSizeID) || (bsid > maxBlockSizeID)) return -1;
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g_blockSizeId = bsid;
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return blockSizeTable[g_blockSizeId-minBlockSizeID];
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}
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int LZ4IO_setBlockMode(LZ4IO_blockMode_t blockMode)
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{
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g_blockIndependence = (blockMode == LZ4IO_blockIndependent);
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return g_blockIndependence;
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}
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/* Default setting : no checksum */
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int LZ4IO_setBlockChecksumMode(int xxhash)
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{
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g_blockChecksum = (xxhash != 0);
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return g_blockChecksum;
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}
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/* Default setting : checksum enabled */
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int LZ4IO_setStreamChecksumMode(int xxhash)
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{
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g_streamChecksum = (xxhash != 0);
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return g_streamChecksum;
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}
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/* Default setting : 0 (no notification) */
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int LZ4IO_setNotificationLevel(int level)
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{
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g_displayLevel = level;
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return g_displayLevel;
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}
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/* Default setting : 0 (disabled) */
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int LZ4IO_setSparseFile(int enable)
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{
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g_sparseFileSupport = (enable!=0);
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return g_sparseFileSupport;
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}
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/* Default setting : 0 (disabled) */
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int LZ4IO_setContentSize(int enable)
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{
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g_contentSizeFlag = (enable!=0);
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return g_contentSizeFlag;
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}
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static unsigned LZ4IO_GetMilliSpan(clock_t nPrevious)
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{
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clock_t nCurrent = clock();
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unsigned nSpan = (unsigned)(((nCurrent - nPrevious) * 1000) / CLOCKS_PER_SEC);
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return nSpan;
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}
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static unsigned long long LZ4IO_GetFileSize(const char* infilename)
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{
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int r;
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#if defined(_MSC_VER)
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struct _stat64 statbuf;
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r = _stat64(infilename, &statbuf);
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#else
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struct stat statbuf;
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r = stat(infilename, &statbuf);
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#endif
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if (r || !S_ISREG(statbuf.st_mode)) return 0; /* failure, or is not a regular file */
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return (unsigned long long)statbuf.st_size;
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}
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/* ************************************************************************ **
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** ********************** LZ4 File / Pipe compression ********************* **
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** ************************************************************************ */
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static int LZ4IO_GetBlockSize_FromBlockId (int id) { return (1 << (8 + (2 * id))); }
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static int LZ4IO_isSkippableMagicNumber(unsigned int magic) { return (magic & LZ4IO_SKIPPABLEMASK) == LZ4IO_SKIPPABLE0; }
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static int LZ4IO_getFiles(const char* input_filename, const char* output_filename, FILE** pfinput, FILE** pfoutput)
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{
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if (!strcmp (input_filename, stdinmark))
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{
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DISPLAYLEVEL(4,"Using stdin for input\n");
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*pfinput = stdin;
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SET_BINARY_MODE(stdin);
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}
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else
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{
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*pfinput = fopen(input_filename, "rb");
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}
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if ( *pfinput==0 )
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{
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DISPLAYLEVEL(1, "Unable to access file for processing: %s\n", input_filename);
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return 1;
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}
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if (!strcmp (output_filename, stdoutmark))
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{
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DISPLAYLEVEL(4,"Using stdout for output\n");
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*pfoutput = stdout;
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SET_BINARY_MODE(stdout);
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if (g_sparseFileSupport==1)
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{
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g_sparseFileSupport = 0;
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DISPLAYLEVEL(4, "Sparse File Support is automatically disabled on stdout ; try --sparse \n");
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}
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}
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else
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{
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/* Check if destination file already exists */
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*pfoutput=0;
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if (output_filename != nulmark) *pfoutput = fopen( output_filename, "rb" );
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if (*pfoutput!=0)
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{
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fclose(*pfoutput);
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if (!g_overwrite)
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{
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int ch = 'Y';
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DISPLAYLEVEL(2, "Warning : %s already exists\n", output_filename);
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if ((g_displayLevel <= 1) || (*pfinput == stdin))
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EXM_THROW(11, "Operation aborted : %s already exists", output_filename); /* No interaction possible */
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DISPLAYLEVEL(2, "Overwrite ? (Y/n) : ");
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while((ch = getchar()) != '\n' && ch != EOF) /* flush integrated */
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if ((ch!='Y') && (ch!='y')) EXM_THROW(12, "No. Operation aborted : %s already exists", output_filename);
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}
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}
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*pfoutput = fopen( output_filename, "wb" );
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}
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if (*pfoutput==0) EXM_THROW(13, "Pb opening %s", output_filename);
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return 0;
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}
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/***************************************
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* Legacy Compression
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***************************************/
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/* unoptimized version; solves endianess & alignment issues */
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static void LZ4IO_writeLE32 (void* p, unsigned value32)
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{
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unsigned char* dstPtr = (unsigned char*)p;
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dstPtr[0] = (unsigned char)value32;
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dstPtr[1] = (unsigned char)(value32 >> 8);
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dstPtr[2] = (unsigned char)(value32 >> 16);
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dstPtr[3] = (unsigned char)(value32 >> 24);
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}
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static int LZ4IO_LZ4_compress(const char* src, char* dst, int srcSize, int dstSize, int cLevel)
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{
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(void)cLevel;
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return LZ4_compress_fast(src, dst, srcSize, dstSize, 1);
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}
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/* LZ4IO_compressFilename_Legacy :
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* This function is intentionally "hidden" (not published in .h)
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* It generates compressed streams using the old 'legacy' format */
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int LZ4IO_compressFilename_Legacy(const char* input_filename, const char* output_filename, int compressionlevel)
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{
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int (*compressionFunction)(const char* src, char* dst, int srcSize, int dstSize, int cLevel);
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unsigned long long filesize = 0;
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unsigned long long compressedfilesize = MAGICNUMBER_SIZE;
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char* in_buff;
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char* out_buff;
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const int outBuffSize = LZ4_compressBound(LEGACY_BLOCKSIZE);
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FILE* finput;
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FILE* foutput;
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clock_t start, end;
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size_t sizeCheck;
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/* Init */
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start = clock();
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if (compressionlevel < 3) compressionFunction = LZ4IO_LZ4_compress; else compressionFunction = LZ4_compress_HC;
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if (LZ4IO_getFiles(input_filename, output_filename, &finput, &foutput))
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EXM_THROW(20, "File error");
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/* Allocate Memory */
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in_buff = (char*)malloc(LEGACY_BLOCKSIZE);
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out_buff = (char*)malloc(outBuffSize);
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if (!in_buff || !out_buff) EXM_THROW(21, "Allocation error : not enough memory");
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/* Write Archive Header */
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LZ4IO_writeLE32(out_buff, LEGACY_MAGICNUMBER);
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sizeCheck = fwrite(out_buff, 1, MAGICNUMBER_SIZE, foutput);
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if (sizeCheck!=MAGICNUMBER_SIZE) EXM_THROW(22, "Write error : cannot write header");
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/* Main Loop */
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while (1)
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{
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unsigned int outSize;
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/* Read Block */
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int inSize = (int) fread(in_buff, (size_t)1, (size_t)LEGACY_BLOCKSIZE, finput);
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if( inSize<=0 ) break;
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filesize += inSize;
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/* Compress Block */
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outSize = compressionFunction(in_buff, out_buff+4, inSize, outBuffSize, compressionlevel);
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compressedfilesize += outSize+4;
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DISPLAYUPDATE(2, "\rRead : %i MB ==> %.2f%% ", (int)(filesize>>20), (double)compressedfilesize/filesize*100);
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/* Write Block */
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LZ4IO_writeLE32(out_buff, outSize);
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sizeCheck = fwrite(out_buff, 1, outSize+4, foutput);
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if (sizeCheck!=(size_t)(outSize+4)) EXM_THROW(23, "Write error : cannot write compressed block");
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}
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/* Status */
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end = clock();
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DISPLAYLEVEL(2, "\r%79s\r", "");
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filesize += !filesize; /* avoid divide by zero */
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DISPLAYLEVEL(2,"Compressed %llu bytes into %llu bytes ==> %.2f%%\n",
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(unsigned long long) filesize, (unsigned long long) compressedfilesize, (double)compressedfilesize/filesize*100);
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{
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double seconds = (double)(end - start)/CLOCKS_PER_SEC;
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DISPLAYLEVEL(4,"Done in %.2f s ==> %.2f MB/s\n", seconds, (double)filesize / seconds / 1024 / 1024);
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}
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/* Close & Free */
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free(in_buff);
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free(out_buff);
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fclose(finput);
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fclose(foutput);
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return 0;
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}
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/*********************************************
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* Compression using Frame format
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*********************************************/
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typedef struct {
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void* srcBuffer;
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size_t srcBufferSize;
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void* dstBuffer;
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size_t dstBufferSize;
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LZ4F_compressionContext_t ctx;
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} cRess_t;
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static cRess_t LZ4IO_createCResources(void)
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{
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const size_t blockSize = (size_t)LZ4IO_GetBlockSize_FromBlockId (g_blockSizeId);
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cRess_t ress;
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LZ4F_errorCode_t errorCode;
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errorCode = LZ4F_createCompressionContext(&(ress.ctx), LZ4F_VERSION);
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if (LZ4F_isError(errorCode)) EXM_THROW(30, "Allocation error : can't create LZ4F context : %s", LZ4F_getErrorName(errorCode));
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/* Allocate Memory */
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ress.srcBuffer = malloc(blockSize);
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ress.srcBufferSize = blockSize;
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ress.dstBufferSize = LZ4F_compressFrameBound(blockSize, NULL); /* cover worst case */
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ress.dstBuffer = malloc(ress.dstBufferSize);
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if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(31, "Allocation error : not enough memory");
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return ress;
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}
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static void LZ4IO_freeCResources(cRess_t ress)
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{
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LZ4F_errorCode_t errorCode;
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free(ress.srcBuffer);
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free(ress.dstBuffer);
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errorCode = LZ4F_freeCompressionContext(ress.ctx);
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if (LZ4F_isError(errorCode)) EXM_THROW(38, "Error : can't free LZ4F context resource : %s", LZ4F_getErrorName(errorCode));
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}
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/*
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* LZ4IO_compressFilename_extRess()
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* result : 0 : compression completed correctly
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* 1 : missing or pb opening srcFileName
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*/
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static int LZ4IO_compressFilename_extRess(cRess_t ress, const char* srcFileName, const char* dstFileName, int compressionLevel)
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{
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unsigned long long filesize = 0;
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unsigned long long compressedfilesize = 0;
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FILE* srcFile;
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FILE* dstFile;
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void* const srcBuffer = ress.srcBuffer;
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void* const dstBuffer = ress.dstBuffer;
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const size_t dstBufferSize = ress.dstBufferSize;
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const size_t blockSize = (size_t)LZ4IO_GetBlockSize_FromBlockId (g_blockSizeId);
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size_t sizeCheck, headerSize, readSize;
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LZ4F_compressionContext_t ctx = ress.ctx; /* just a pointer */
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LZ4F_preferences_t prefs;
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/* Init */
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memset(&prefs, 0, sizeof(prefs));
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/* File check */
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if (LZ4IO_getFiles(srcFileName, dstFileName, &srcFile, &dstFile)) return 1;
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/* Set compression parameters */
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prefs.autoFlush = 1;
|
|
prefs.compressionLevel = compressionLevel;
|
|
prefs.frameInfo.blockMode = (LZ4F_blockMode_t)g_blockIndependence;
|
|
prefs.frameInfo.blockSizeID = (LZ4F_blockSizeID_t)g_blockSizeId;
|
|
prefs.frameInfo.contentChecksumFlag = (LZ4F_contentChecksum_t)g_streamChecksum;
|
|
if (g_contentSizeFlag)
|
|
{
|
|
unsigned long long fileSize = LZ4IO_GetFileSize(srcFileName);
|
|
prefs.frameInfo.contentSize = fileSize; /* == 0 if input == stdin */
|
|
if (fileSize==0)
|
|
DISPLAYLEVEL(3, "Warning : cannot determine uncompressed frame content size \n");
|
|
}
|
|
|
|
/* read first block */
|
|
readSize = fread(srcBuffer, (size_t)1, blockSize, srcFile);
|
|
filesize += readSize;
|
|
|
|
/* single-block file */
|
|
if (readSize < blockSize)
|
|
{
|
|
/* Compress in single pass */
|
|
size_t cSize = LZ4F_compressFrame(dstBuffer, dstBufferSize, srcBuffer, readSize, &prefs);
|
|
if (LZ4F_isError(cSize)) EXM_THROW(34, "Compression failed : %s", LZ4F_getErrorName(cSize));
|
|
compressedfilesize += cSize;
|
|
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%% ",
|
|
(unsigned)(filesize>>20), (double)compressedfilesize/(filesize+!filesize)*100); /* avoid division by zero */
|
|
|
|
/* Write Block */
|
|
sizeCheck = fwrite(dstBuffer, 1, cSize, dstFile);
|
|
if (sizeCheck!=cSize) EXM_THROW(35, "Write error : cannot write compressed block");
|
|
}
|
|
|
|
else
|
|
|
|
/* multiple-blocks file */
|
|
{
|
|
/* Write Archive Header */
|
|
headerSize = LZ4F_compressBegin(ctx, dstBuffer, dstBufferSize, &prefs);
|
|
if (LZ4F_isError(headerSize)) EXM_THROW(32, "File header generation failed : %s", LZ4F_getErrorName(headerSize));
|
|
sizeCheck = fwrite(dstBuffer, 1, headerSize, dstFile);
|
|
if (sizeCheck!=headerSize) EXM_THROW(33, "Write error : cannot write header");
|
|
compressedfilesize += headerSize;
|
|
|
|
/* Main Loop */
|
|
while (readSize>0)
|
|
{
|
|
size_t outSize;
|
|
|
|
/* Compress Block */
|
|
outSize = LZ4F_compressUpdate(ctx, dstBuffer, dstBufferSize, srcBuffer, readSize, NULL);
|
|
if (LZ4F_isError(outSize)) EXM_THROW(34, "Compression failed : %s", LZ4F_getErrorName(outSize));
|
|
compressedfilesize += outSize;
|
|
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%% ", (unsigned)(filesize>>20), (double)compressedfilesize/filesize*100);
|
|
|
|
/* Write Block */
|
|
sizeCheck = fwrite(dstBuffer, 1, outSize, dstFile);
|
|
if (sizeCheck!=outSize) EXM_THROW(35, "Write error : cannot write compressed block");
|
|
|
|
/* Read next block */
|
|
readSize = fread(srcBuffer, (size_t)1, (size_t)blockSize, srcFile);
|
|
filesize += readSize;
|
|
}
|
|
|
|
/* End of Stream mark */
|
|
headerSize = LZ4F_compressEnd(ctx, dstBuffer, dstBufferSize, NULL);
|
|
if (LZ4F_isError(headerSize)) EXM_THROW(36, "End of file generation failed : %s", LZ4F_getErrorName(headerSize));
|
|
|
|
sizeCheck = fwrite(dstBuffer, 1, headerSize, dstFile);
|
|
if (sizeCheck!=headerSize) EXM_THROW(37, "Write error : cannot write end of stream");
|
|
compressedfilesize += headerSize;
|
|
}
|
|
|
|
/* Release files */
|
|
fclose (srcFile);
|
|
fclose (dstFile);
|
|
|
|
/* Final Status */
|
|
DISPLAYLEVEL(2, "\r%79s\r", "");
|
|
DISPLAYLEVEL(2, "Compressed %llu bytes into %llu bytes ==> %.2f%%\n",
|
|
filesize, compressedfilesize, (double)compressedfilesize/(filesize + !filesize)*100); /* avoid division by zero */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int LZ4IO_compressFilename(const char* srcFileName, const char* dstFileName, int compressionLevel)
|
|
{
|
|
clock_t start, end;
|
|
cRess_t ress;
|
|
int issueWithSrcFile = 0;
|
|
|
|
/* Init */
|
|
start = clock();
|
|
ress = LZ4IO_createCResources();
|
|
|
|
/* Compress File */
|
|
issueWithSrcFile += LZ4IO_compressFilename_extRess(ress, srcFileName, dstFileName, compressionLevel);
|
|
|
|
/* Free resources */
|
|
LZ4IO_freeCResources(ress);
|
|
|
|
/* Final Status */
|
|
end = clock();
|
|
{
|
|
double seconds = (double)(end - start) / CLOCKS_PER_SEC;
|
|
DISPLAYLEVEL(4, "Completed in %.2f sec \n", seconds);
|
|
}
|
|
|
|
return issueWithSrcFile;
|
|
}
|
|
|
|
|
|
#define FNSPACE 30
|
|
int LZ4IO_compressMultipleFilenames(const char** inFileNamesTable, int ifntSize, const char* suffix, int compressionLevel)
|
|
{
|
|
int i;
|
|
int missed_files = 0;
|
|
char* dstFileName = (char*)malloc(FNSPACE);
|
|
size_t ofnSize = FNSPACE;
|
|
const size_t suffixSize = strlen(suffix);
|
|
cRess_t ress;
|
|
|
|
/* init */
|
|
ress = LZ4IO_createCResources();
|
|
|
|
/* loop on each file */
|
|
for (i=0; i<ifntSize; i++)
|
|
{
|
|
size_t ifnSize = strlen(inFileNamesTable[i]);
|
|
if (ofnSize <= ifnSize+suffixSize+1) { free(dstFileName); ofnSize = ifnSize + 20; dstFileName = (char*)malloc(ofnSize); }
|
|
strcpy(dstFileName, inFileNamesTable[i]);
|
|
strcat(dstFileName, suffix);
|
|
|
|
missed_files += LZ4IO_compressFilename_extRess(ress, inFileNamesTable[i], dstFileName, compressionLevel);
|
|
}
|
|
|
|
/* Close & Free */
|
|
LZ4IO_freeCResources(ress);
|
|
free(dstFileName);
|
|
|
|
return missed_files;
|
|
}
|
|
|
|
|
|
/* ********************************************************************* */
|
|
/* ********************** LZ4 file-stream Decompression **************** */
|
|
/* ********************************************************************* */
|
|
|
|
static unsigned LZ4IO_readLE32 (const void* s)
|
|
{
|
|
const unsigned char* srcPtr = (const unsigned char*)s;
|
|
unsigned value32 = srcPtr[0];
|
|
value32 += (srcPtr[1]<<8);
|
|
value32 += (srcPtr[2]<<16);
|
|
value32 += ((unsigned)srcPtr[3])<<24;
|
|
return value32;
|
|
}
|
|
|
|
static unsigned LZ4IO_fwriteSparse(FILE* file, const void* buffer, size_t bufferSize, unsigned storedSkips)
|
|
{
|
|
const size_t* const bufferT = (const size_t*)buffer; /* Buffer is supposed malloc'ed, hence aligned on size_t */
|
|
const size_t* ptrT = bufferT;
|
|
size_t bufferSizeT = bufferSize / sizeT;
|
|
const size_t* const bufferTEnd = bufferT + bufferSizeT;
|
|
static const size_t segmentSizeT = (32 KB) / sizeT;
|
|
|
|
if (!g_sparseFileSupport) /* normal write */
|
|
{
|
|
size_t sizeCheck = fwrite(buffer, 1, bufferSize, file);
|
|
if (sizeCheck != bufferSize) EXM_THROW(70, "Write error : cannot write decoded block");
|
|
return 0;
|
|
}
|
|
|
|
/* avoid int overflow */
|
|
if (storedSkips > 1 GB)
|
|
{
|
|
int seekResult = fseek(file, 1 GB, SEEK_CUR);
|
|
if (seekResult != 0) EXM_THROW(71, "1 GB skip error (sparse file support)");
|
|
storedSkips -= 1 GB;
|
|
}
|
|
|
|
while (ptrT < bufferTEnd)
|
|
{
|
|
size_t seg0SizeT = segmentSizeT;
|
|
size_t nb0T;
|
|
int seekResult;
|
|
|
|
/* count leading zeros */
|
|
if (seg0SizeT > bufferSizeT) seg0SizeT = bufferSizeT;
|
|
bufferSizeT -= seg0SizeT;
|
|
for (nb0T=0; (nb0T < seg0SizeT) && (ptrT[nb0T] == 0); nb0T++) ;
|
|
storedSkips += (unsigned)(nb0T * sizeT);
|
|
|
|
if (nb0T != seg0SizeT) /* not all 0s */
|
|
{
|
|
size_t sizeCheck;
|
|
seekResult = fseek(file, storedSkips, SEEK_CUR);
|
|
if (seekResult) EXM_THROW(72, "Sparse skip error ; try --no-sparse");
|
|
storedSkips = 0;
|
|
seg0SizeT -= nb0T;
|
|
ptrT += nb0T;
|
|
sizeCheck = fwrite(ptrT, sizeT, seg0SizeT, file);
|
|
if (sizeCheck != seg0SizeT) EXM_THROW(73, "Write error : cannot write decoded block");
|
|
}
|
|
ptrT += seg0SizeT;
|
|
}
|
|
|
|
if (bufferSize & maskT) /* size not multiple of sizeT : implies end of block */
|
|
{
|
|
const char* const restStart = (const char*)bufferTEnd;
|
|
const char* restPtr = restStart;
|
|
size_t restSize = bufferSize & maskT;
|
|
const char* const restEnd = restStart + restSize;
|
|
for (; (restPtr < restEnd) && (*restPtr == 0); restPtr++) ;
|
|
storedSkips += (unsigned) (restPtr - restStart);
|
|
if (restPtr != restEnd)
|
|
{
|
|
size_t sizeCheck;
|
|
int seekResult = fseek(file, storedSkips, SEEK_CUR);
|
|
if (seekResult) EXM_THROW(74, "Sparse skip error ; try --no-sparse");
|
|
storedSkips = 0;
|
|
sizeCheck = fwrite(restPtr, 1, restEnd - restPtr, file);
|
|
if (sizeCheck != (size_t)(restEnd - restPtr)) EXM_THROW(75, "Write error : cannot write decoded end of block");
|
|
}
|
|
}
|
|
|
|
return storedSkips;
|
|
}
|
|
|
|
static void LZ4IO_fwriteSparseEnd(FILE* file, unsigned storedSkips)
|
|
{
|
|
char lastZeroByte[1] = { 0 };
|
|
|
|
if (storedSkips>0) /* implies g_sparseFileSupport */
|
|
{
|
|
int seekResult;
|
|
size_t sizeCheck;
|
|
storedSkips --;
|
|
seekResult = fseek(file, storedSkips, SEEK_CUR);
|
|
if (seekResult != 0) EXM_THROW(69, "Final skip error (sparse file)\n");
|
|
sizeCheck = fwrite(lastZeroByte, 1, 1, file);
|
|
if (sizeCheck != 1) EXM_THROW(69, "Write error : cannot write last zero\n");
|
|
}
|
|
}
|
|
|
|
|
|
static unsigned g_magicRead = 0;
|
|
static unsigned long long LZ4IO_decodeLegacyStream(FILE* finput, FILE* foutput)
|
|
{
|
|
unsigned long long filesize = 0;
|
|
char* in_buff;
|
|
char* out_buff;
|
|
unsigned storedSkips = 0;
|
|
|
|
/* Allocate Memory */
|
|
in_buff = (char*)malloc(LZ4_compressBound(LEGACY_BLOCKSIZE));
|
|
out_buff = (char*)malloc(LEGACY_BLOCKSIZE);
|
|
if (!in_buff || !out_buff) EXM_THROW(51, "Allocation error : not enough memory");
|
|
|
|
/* Main Loop */
|
|
while (1)
|
|
{
|
|
int decodeSize;
|
|
size_t sizeCheck;
|
|
unsigned int blockSize;
|
|
|
|
/* Block Size */
|
|
sizeCheck = fread(in_buff, 1, 4, finput);
|
|
if (sizeCheck==0) break; /* Nothing to read : file read is completed */
|
|
blockSize = LZ4IO_readLE32(in_buff); /* Convert to Little Endian */
|
|
if (blockSize > LZ4_COMPRESSBOUND(LEGACY_BLOCKSIZE))
|
|
{ /* Cannot read next block : maybe new stream ? */
|
|
g_magicRead = blockSize;
|
|
break;
|
|
}
|
|
|
|
/* Read Block */
|
|
sizeCheck = fread(in_buff, 1, blockSize, finput);
|
|
if (sizeCheck!=blockSize) EXM_THROW(52, "Read error : cannot access compressed block !");
|
|
|
|
/* Decode Block */
|
|
decodeSize = LZ4_decompress_safe(in_buff, out_buff, blockSize, LEGACY_BLOCKSIZE);
|
|
if (decodeSize < 0) EXM_THROW(53, "Decoding Failed ! Corrupted input detected !");
|
|
filesize += decodeSize;
|
|
|
|
/* Write Block */
|
|
storedSkips = LZ4IO_fwriteSparse(foutput, out_buff, decodeSize, storedSkips);
|
|
}
|
|
|
|
LZ4IO_fwriteSparseEnd(foutput, storedSkips);
|
|
|
|
/* Free */
|
|
free(in_buff);
|
|
free(out_buff);
|
|
|
|
return filesize;
|
|
}
|
|
|
|
|
|
|
|
typedef struct {
|
|
void* srcBuffer;
|
|
size_t srcBufferSize;
|
|
void* dstBuffer;
|
|
size_t dstBufferSize;
|
|
LZ4F_decompressionContext_t dCtx;
|
|
} dRess_t;
|
|
|
|
static const size_t LZ4IO_dBufferSize = 64 KB;
|
|
|
|
static dRess_t LZ4IO_createDResources(void)
|
|
{
|
|
dRess_t ress;
|
|
LZ4F_errorCode_t errorCode;
|
|
|
|
/* init */
|
|
errorCode = LZ4F_createDecompressionContext(&ress.dCtx, LZ4F_VERSION);
|
|
if (LZ4F_isError(errorCode)) EXM_THROW(60, "Can't create LZ4F context : %s", LZ4F_getErrorName(errorCode));
|
|
|
|
/* Allocate Memory */
|
|
ress.srcBufferSize = LZ4IO_dBufferSize;
|
|
ress.srcBuffer = malloc(ress.srcBufferSize);
|
|
ress.dstBufferSize = LZ4IO_dBufferSize;
|
|
ress.dstBuffer = malloc(ress.dstBufferSize);
|
|
if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(61, "Allocation error : not enough memory");
|
|
|
|
return ress;
|
|
}
|
|
|
|
static void LZ4IO_freeDResources(dRess_t ress)
|
|
{
|
|
LZ4F_errorCode_t errorCode = LZ4F_freeDecompressionContext(ress.dCtx);
|
|
if (LZ4F_isError(errorCode)) EXM_THROW(69, "Error : can't free LZ4F context resource : %s", LZ4F_getErrorName(errorCode));
|
|
free(ress.srcBuffer);
|
|
free(ress.dstBuffer);
|
|
}
|
|
|
|
|
|
static unsigned long long LZ4IO_decompressLZ4F(dRess_t ress, FILE* srcFile, FILE* dstFile)
|
|
{
|
|
unsigned long long filesize = 0;
|
|
LZ4F_errorCode_t nextToLoad;
|
|
unsigned storedSkips = 0;
|
|
|
|
/* Init feed with magic number (already consumed from FILE* sFile) */
|
|
{
|
|
size_t inSize = MAGICNUMBER_SIZE;
|
|
size_t outSize= 0;
|
|
LZ4IO_writeLE32(ress.srcBuffer, LZ4IO_MAGICNUMBER);
|
|
nextToLoad = LZ4F_decompress(ress.dCtx, ress.dstBuffer, &outSize, ress.srcBuffer, &inSize, NULL);
|
|
if (LZ4F_isError(nextToLoad)) EXM_THROW(62, "Header error : %s", LZ4F_getErrorName(nextToLoad));
|
|
}
|
|
|
|
/* Main Loop */
|
|
for (;nextToLoad;)
|
|
{
|
|
size_t readSize;
|
|
size_t pos = 0;
|
|
size_t decodedBytes = ress.dstBufferSize;
|
|
|
|
/* Read input */
|
|
if (nextToLoad > ress.srcBufferSize) nextToLoad = ress.srcBufferSize;
|
|
readSize = fread(ress.srcBuffer, 1, nextToLoad, srcFile);
|
|
if (!readSize)
|
|
break; /* empty file or stream */
|
|
|
|
while ((pos < readSize) || (decodedBytes == ress.dstBufferSize)) /* still to read, or still to flush */
|
|
{
|
|
/* Decode Input (at least partially) */
|
|
size_t remaining = readSize - pos;
|
|
decodedBytes = ress.dstBufferSize;
|
|
nextToLoad = LZ4F_decompress(ress.dCtx, ress.dstBuffer, &decodedBytes, (char*)(ress.srcBuffer)+pos, &remaining, NULL);
|
|
if (LZ4F_isError(nextToLoad)) EXM_THROW(66, "Decompression error : %s", LZ4F_getErrorName(nextToLoad));
|
|
pos += remaining;
|
|
|
|
if (decodedBytes)
|
|
{
|
|
/* Write Block */
|
|
filesize += decodedBytes;
|
|
DISPLAYUPDATE(2, "\rDecompressed : %u MB ", (unsigned)(filesize>>20));
|
|
storedSkips = LZ4IO_fwriteSparse(dstFile, ress.dstBuffer, decodedBytes, storedSkips);
|
|
}
|
|
|
|
if (!nextToLoad) break;
|
|
}
|
|
}
|
|
|
|
LZ4IO_fwriteSparseEnd(dstFile, storedSkips);
|
|
|
|
if (nextToLoad!=0)
|
|
EXM_THROW(67, "Unfinished stream");
|
|
|
|
return filesize;
|
|
}
|
|
|
|
|
|
#define PTSIZE (64 KB)
|
|
#define PTSIZET (PTSIZE / sizeof(size_t))
|
|
static unsigned long long LZ4IO_passThrough(FILE* finput, FILE* foutput, unsigned char MNstore[MAGICNUMBER_SIZE])
|
|
{
|
|
size_t buffer[PTSIZET];
|
|
size_t read = 1, sizeCheck;
|
|
unsigned long long total = MAGICNUMBER_SIZE;
|
|
unsigned storedSkips = 0;
|
|
|
|
sizeCheck = fwrite(MNstore, 1, MAGICNUMBER_SIZE, foutput);
|
|
if (sizeCheck != MAGICNUMBER_SIZE) EXM_THROW(50, "Pass-through write error");
|
|
|
|
while (read)
|
|
{
|
|
read = fread(buffer, 1, PTSIZE, finput);
|
|
total += read;
|
|
storedSkips = LZ4IO_fwriteSparse(foutput, buffer, read, storedSkips);
|
|
}
|
|
|
|
LZ4IO_fwriteSparseEnd(foutput, storedSkips);
|
|
return total;
|
|
}
|
|
|
|
|
|
#define ENDOFSTREAM ((unsigned long long)-1)
|
|
static unsigned long long selectDecoder(dRess_t ress, FILE* finput, FILE* foutput)
|
|
{
|
|
unsigned char MNstore[MAGICNUMBER_SIZE];
|
|
unsigned magicNumber, size;
|
|
int errorNb;
|
|
size_t nbReadBytes;
|
|
static unsigned nbCalls = 0;
|
|
|
|
/* init */
|
|
nbCalls++;
|
|
|
|
/* Check Archive Header */
|
|
if (g_magicRead)
|
|
{
|
|
magicNumber = g_magicRead;
|
|
g_magicRead = 0;
|
|
}
|
|
else
|
|
{
|
|
nbReadBytes = fread(MNstore, 1, MAGICNUMBER_SIZE, finput);
|
|
if (nbReadBytes==0) return ENDOFSTREAM; /* EOF */
|
|
if (nbReadBytes != MAGICNUMBER_SIZE) EXM_THROW(40, "Unrecognized header : Magic Number unreadable");
|
|
magicNumber = LZ4IO_readLE32(MNstore); /* Little Endian format */
|
|
}
|
|
if (LZ4IO_isSkippableMagicNumber(magicNumber)) magicNumber = LZ4IO_SKIPPABLE0; /* fold skippable magic numbers */
|
|
|
|
switch(magicNumber)
|
|
{
|
|
case LZ4IO_MAGICNUMBER:
|
|
return LZ4IO_decompressLZ4F(ress, finput, foutput);
|
|
case LEGACY_MAGICNUMBER:
|
|
DISPLAYLEVEL(4, "Detected : Legacy format \n");
|
|
return LZ4IO_decodeLegacyStream(finput, foutput);
|
|
case LZ4IO_SKIPPABLE0:
|
|
DISPLAYLEVEL(4, "Skipping detected skippable area \n");
|
|
nbReadBytes = fread(MNstore, 1, 4, finput);
|
|
if (nbReadBytes != 4) EXM_THROW(42, "Stream error : skippable size unreadable");
|
|
size = LZ4IO_readLE32(MNstore); /* Little Endian format */
|
|
errorNb = fseek(finput, size, SEEK_CUR);
|
|
if (errorNb != 0) EXM_THROW(43, "Stream error : cannot skip skippable area");
|
|
return selectDecoder(ress, finput, foutput);
|
|
EXTENDED_FORMAT;
|
|
default:
|
|
if (nbCalls == 1) /* just started */
|
|
{
|
|
if (g_overwrite)
|
|
return LZ4IO_passThrough(finput, foutput, MNstore);
|
|
EXM_THROW(44,"Unrecognized header : file cannot be decoded"); /* Wrong magic number at the beginning of 1st stream */
|
|
}
|
|
DISPLAYLEVEL(2, "Stream followed by unrecognized data\n");
|
|
return ENDOFSTREAM;
|
|
}
|
|
}
|
|
|
|
|
|
static int LZ4IO_decompressFile_extRess(dRess_t ress, const char* input_filename, const char* output_filename)
|
|
{
|
|
unsigned long long filesize = 0, decodedSize=0;
|
|
FILE* finput;
|
|
FILE* foutput;
|
|
|
|
|
|
/* Init */
|
|
if (LZ4IO_getFiles(input_filename, output_filename, &finput, &foutput))
|
|
return 1;
|
|
|
|
/* sparse file */
|
|
if (g_sparseFileSupport) { SET_SPARSE_FILE_MODE(foutput); }
|
|
|
|
/* Loop over multiple streams */
|
|
do
|
|
{
|
|
decodedSize = selectDecoder(ress, finput, foutput);
|
|
if (decodedSize != ENDOFSTREAM)
|
|
filesize += decodedSize;
|
|
} while (decodedSize != ENDOFSTREAM);
|
|
|
|
/* Final Status */
|
|
DISPLAYLEVEL(2, "\r%79s\r", "");
|
|
DISPLAYLEVEL(2, "Successfully decoded %llu bytes \n", filesize);
|
|
|
|
/* Close */
|
|
fclose(finput);
|
|
fclose(foutput);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int LZ4IO_decompressFilename(const char* input_filename, const char* output_filename)
|
|
{
|
|
dRess_t ress;
|
|
clock_t start, end;
|
|
int missingFiles = 0;
|
|
|
|
start = clock();
|
|
|
|
ress = LZ4IO_createDResources();
|
|
missingFiles += LZ4IO_decompressFile_extRess(ress, input_filename, output_filename);
|
|
LZ4IO_freeDResources(ress);
|
|
|
|
end = clock();
|
|
if (end==start) end=start+1;
|
|
{
|
|
double seconds = (double)(end - start)/CLOCKS_PER_SEC;
|
|
DISPLAYLEVEL(4, "Done in %.2f sec \n", seconds);
|
|
}
|
|
|
|
return missingFiles;
|
|
}
|
|
|
|
|
|
#define MAXSUFFIXSIZE 8
|
|
int LZ4IO_decompressMultipleFilenames(const char** inFileNamesTable, int ifntSize, const char* suffix)
|
|
{
|
|
int i;
|
|
int skippedFiles = 0;
|
|
int missingFiles = 0;
|
|
char* outFileName = (char*)malloc(FNSPACE);
|
|
size_t ofnSize = FNSPACE;
|
|
const size_t suffixSize = strlen(suffix);
|
|
const char* suffixPtr;
|
|
dRess_t ress;
|
|
|
|
if (outFileName==NULL) exit(1); /* not enough memory */
|
|
ress = LZ4IO_createDResources();
|
|
|
|
for (i=0; i<ifntSize; i++)
|
|
{
|
|
size_t ifnSize = strlen(inFileNamesTable[i]);
|
|
suffixPtr = inFileNamesTable[i] + ifnSize - suffixSize;
|
|
if (ofnSize <= ifnSize-suffixSize+1) { free(outFileName); ofnSize = ifnSize + 20; outFileName = (char*)malloc(ofnSize); if (outFileName==NULL) exit(1); }
|
|
if (ifnSize <= suffixSize || strcmp(suffixPtr, suffix) != 0)
|
|
{
|
|
DISPLAYLEVEL(1, "File extension doesn't match expected LZ4_EXTENSION (%4s); will not process file: %s\n", suffix, inFileNamesTable[i]);
|
|
skippedFiles++;
|
|
continue;
|
|
}
|
|
memcpy(outFileName, inFileNamesTable[i], ifnSize - suffixSize);
|
|
outFileName[ifnSize-suffixSize] = '\0';
|
|
|
|
missingFiles += LZ4IO_decompressFile_extRess(ress, inFileNamesTable[i], outFileName);
|
|
}
|
|
|
|
LZ4IO_freeDResources(ress);
|
|
free(outFileName);
|
|
return missingFiles + skippedFiles;
|
|
}
|