428 lines
14 KiB
C
428 lines
14 KiB
C
/*
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fileio.c - File i/o handler
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Copyright (C) Yann Collet 2013-2015
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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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- zstd source repository : https://github.com/Cyan4973/zstd
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- 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 ZSTD compression library, it is a user program of ZSTD library.
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The license of ZSTD library is BSD.
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The license of this 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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/* Disable some Visual warning messages */
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#ifdef _MSC_VER
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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 GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
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#define _FILE_OFFSET_BITS 64 /* Large file support on 32-bits unix */
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#define _POSIX_SOURCE 1 /* enable fileno() within <stdio.h> on unix */
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/* *************************************
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* Includes
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***************************************/
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#include <stdio.h> /* fprintf, fopen, fread, _fileno, stdin, stdout */
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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 <errno.h> /* errno */
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#include "mem.h"
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#include "fileio_legacy.h"
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#include "zstd_legacy.h" /* legacy support */
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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) || defined(__CYGWIN__)
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# include <fcntl.h> /* _O_BINARY */
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# include <io.h> /* _setmode, _isatty */
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# ifdef __MINGW32__
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/* int _fileno(FILE *stream); // seems no longer useful // MINGW somehow forgets to include this windows declaration into <stdio.h> */
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# endif
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# define SET_BINARY_MODE(file) { int unused = _setmode(_fileno(file), _O_BINARY); (void)unused; }
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# define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
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#else
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# include <unistd.h> /* isatty */
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# define SET_BINARY_MODE(file)
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# define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
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#endif
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/* *************************************
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* Constants
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***************************************/
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#define KB *(1U<<10)
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#define MB *(1U<<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 _6BITS 0x3F
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#define _8BITS 0xFF
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#define BIT6 0x40
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#define BIT7 0x80
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#define FIO_FRAMEHEADERSIZE 5 /* as a define, because needed to allocated table on stack */
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#define FSE_CHECKSUM_SEED 0
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#define CACHELINE 64
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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 U32 g_displayLevel = 1; /* 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 ((FIO_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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void FIO_legacy_setNotificationLevel(unsigned level) { g_displayLevel=level; }
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/* *************************************
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* Exceptions
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***************************************/
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#ifndef DEBUG
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# define DEBUG 0
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#endif
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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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* Functions
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***************************************/
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static unsigned FIO_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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unsigned long long FIOv01_decompressFrame(FILE* foutput, FILE* finput)
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{
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size_t outBuffSize = 512 KB;
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BYTE* outBuff = (BYTE*)malloc(outBuffSize);
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size_t inBuffSize = 128 KB + 8;
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BYTE inBuff[128 KB + 8];
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BYTE* op = outBuff;
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BYTE* const oend = outBuff + outBuffSize;
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U64 filesize = 0;
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size_t toRead;
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size_t sizeCheck;
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ZSTDv01_Dctx* dctx = ZSTDv01_createDCtx();
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/* init */
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if (outBuff==NULL) EXM_THROW(41, "Error : not enough memory to decode legacy frame");
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/* restore header, already read from input */
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MEM_writeLE32(inBuff, ZSTDv01_magicNumberLE);
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sizeCheck = ZSTDv01_decompressContinue(dctx, NULL, 0, inBuff, sizeof(ZSTDv01_magicNumberLE)); /* Decode frame header */
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if (ZSTDv01_isError(sizeCheck)) EXM_THROW(42, "Error decoding legacy header");
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/* Main decompression Loop */
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toRead = ZSTDv01_nextSrcSizeToDecompress(dctx);
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while (toRead)
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{
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size_t readSize, decodedSize;
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/* Fill input buffer */
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if (toRead > inBuffSize)
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EXM_THROW(43, "too large block");
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readSize = fread(inBuff, 1, toRead, finput);
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if (readSize != toRead)
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EXM_THROW(44, "Read error");
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/* Decode block */
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decodedSize = ZSTDv01_decompressContinue(dctx, op, oend-op, inBuff, readSize);
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if (ZSTDv01_isError(decodedSize)) EXM_THROW(45, "Decoding error : input corrupted");
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if (decodedSize) /* not a header */
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{
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/* Write block */
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sizeCheck = fwrite(op, 1, decodedSize, foutput);
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if (sizeCheck != decodedSize) EXM_THROW(46, "Write error : unable to write data block to destination file");
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filesize += decodedSize;
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op += decodedSize;
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if (op==oend) op = outBuff;
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DISPLAYUPDATE(2, "\rDecoded : %u MB... ", (U32)(filesize>>20) );
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}
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/* prepare for next Block */
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toRead = ZSTDv01_nextSrcSizeToDecompress(dctx);
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}
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/* release resources */
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free(outBuff);
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free(dctx);
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return filesize;
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}
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unsigned long long FIOv02_decompressFrame(FILE* foutput, FILE* finput)
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{
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size_t outBuffSize = 512 KB;
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BYTE* outBuff = (BYTE*)malloc(outBuffSize);
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size_t inBuffSize = 128 KB + 8;
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BYTE inBuff[128 KB + 8];
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BYTE* op = outBuff;
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BYTE* const oend = outBuff + outBuffSize;
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U64 filesize = 0;
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size_t toRead;
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size_t sizeCheck;
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ZSTDv02_Dctx* dctx = ZSTDv02_createDCtx();
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/* init */
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if (outBuff==NULL) EXM_THROW(41, "Error : not enough memory to decode legacy frame");
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/* restore header, already read from input */
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MEM_writeLE32(inBuff, ZSTDv02_magicNumber);
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sizeCheck = ZSTDv02_decompressContinue(dctx, NULL, 0, inBuff, sizeof(ZSTDv02_magicNumber)); /* Decode frame header */
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if (ZSTDv02_isError(sizeCheck)) EXM_THROW(42, "Error decoding legacy header");
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/* Main decompression Loop */
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toRead = ZSTDv02_nextSrcSizeToDecompress(dctx);
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while (toRead)
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{
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size_t readSize, decodedSize;
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/* Fill input buffer */
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if (toRead > inBuffSize)
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EXM_THROW(43, "too large block");
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readSize = fread(inBuff, 1, toRead, finput);
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if (readSize != toRead)
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EXM_THROW(44, "Read error");
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/* Decode block */
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decodedSize = ZSTDv02_decompressContinue(dctx, op, oend-op, inBuff, readSize);
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if (ZSTDv02_isError(decodedSize)) EXM_THROW(45, "Decoding error : input corrupted");
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if (decodedSize) /* not a header */
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{
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/* Write block */
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sizeCheck = fwrite(op, 1, decodedSize, foutput);
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if (sizeCheck != decodedSize) EXM_THROW(46, "Write error : unable to write data block to destination file");
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filesize += decodedSize;
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op += decodedSize;
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if (op==oend) op = outBuff;
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DISPLAYUPDATE(2, "\rDecoded : %u MB... ", (U32)(filesize>>20) );
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}
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/* prepare for next Block */
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toRead = ZSTDv02_nextSrcSizeToDecompress(dctx);
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}
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/* release resources */
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free(outBuff);
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free(dctx);
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return filesize;
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}
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unsigned long long FIOv03_decompressFrame(FILE* foutput, FILE* finput)
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{
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size_t outBuffSize = 512 KB;
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BYTE* outBuff = (BYTE*)malloc(outBuffSize);
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size_t inBuffSize = 128 KB + 8;
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BYTE inBuff[128 KB + 8];
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BYTE* op = outBuff;
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BYTE* const oend = outBuff + outBuffSize;
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U64 filesize = 0;
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size_t toRead;
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size_t sizeCheck;
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ZSTDv03_Dctx* dctx = ZSTDv03_createDCtx();
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/* init */
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if (outBuff==NULL) EXM_THROW(41, "Error : not enough memory to decode legacy frame");
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/* restore header, already read from input */
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MEM_writeLE32(inBuff, ZSTDv03_magicNumber);
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sizeCheck = ZSTDv03_decompressContinue(dctx, NULL, 0, inBuff, sizeof(ZSTDv03_magicNumber)); /* Decode frame header */
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if (ZSTDv03_isError(sizeCheck)) EXM_THROW(42, "Error decoding legacy header");
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/* Main decompression Loop */
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toRead = ZSTDv03_nextSrcSizeToDecompress(dctx);
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while (toRead)
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{
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size_t readSize, decodedSize;
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/* Fill input buffer */
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if (toRead > inBuffSize)
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EXM_THROW(43, "too large block");
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readSize = fread(inBuff, 1, toRead, finput);
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if (readSize != toRead)
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EXM_THROW(44, "Read error");
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/* Decode block */
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decodedSize = ZSTDv03_decompressContinue(dctx, op, oend-op, inBuff, readSize);
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if (ZSTDv03_isError(decodedSize)) EXM_THROW(45, "Decoding error : input corrupted");
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if (decodedSize) /* not a header */
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{
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/* Write block */
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sizeCheck = fwrite(op, 1, decodedSize, foutput);
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if (sizeCheck != decodedSize) EXM_THROW(46, "Write error : unable to write data block to destination file");
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filesize += decodedSize;
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op += decodedSize;
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if (op==oend) op = outBuff;
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DISPLAYUPDATE(2, "\rDecoded : %u MB... ", (U32)(filesize>>20) );
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}
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/* prepare for next Block */
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toRead = ZSTDv03_nextSrcSizeToDecompress(dctx);
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}
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/* release resources */
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free(outBuff);
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free(dctx);
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return filesize;
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}
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/*- v0.4.x -*/
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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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void* dictBuffer;
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size_t dictBufferSize;
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ZBUFFv04_DCtx* dctx;
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} dRessv04_t;
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static dRessv04_t FIOv04_createDResources(void)
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{
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dRessv04_t ress;
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/* init */
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ress.dctx = ZBUFFv04_createDCtx();
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if (ress.dctx==NULL) EXM_THROW(60, "Can't create ZBUFF decompression context");
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ress.dictBuffer = NULL; ress.dictBufferSize=0;
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/* Allocate Memory */
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ress.srcBufferSize = ZBUFFv04_recommendedDInSize();
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ress.srcBuffer = malloc(ress.srcBufferSize);
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ress.dstBufferSize = ZBUFFv04_recommendedDOutSize();
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ress.dstBuffer = malloc(ress.dstBufferSize);
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if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(61, "Allocation error : not enough memory");
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return ress;
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}
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static void FIOv04_freeDResources(dRessv04_t ress)
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{
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size_t errorCode = ZBUFFv04_freeDCtx(ress.dctx);
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if (ZBUFFv04_isError(errorCode)) EXM_THROW(69, "Error : can't free ZBUFF context resource : %s", ZBUFFv04_getErrorName(errorCode));
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free(ress.srcBuffer);
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free(ress.dstBuffer);
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free(ress.dictBuffer);
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}
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unsigned long long FIOv04_decompressFrame(dRessv04_t ress,
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FILE* foutput, FILE* finput)
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{
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U64 frameSize = 0;
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size_t readSize = 4;
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MEM_writeLE32(ress.srcBuffer, ZSTDv04_magicNumber);
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ZBUFFv04_decompressInit(ress.dctx);
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ZBUFFv04_decompressWithDictionary(ress.dctx, ress.dictBuffer, ress.dictBufferSize);
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while (1)
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{
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/* Decode */
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size_t sizeCheck;
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size_t inSize=readSize, decodedSize=ress.dstBufferSize;
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size_t toRead = ZBUFFv04_decompressContinue(ress.dctx, ress.dstBuffer, &decodedSize, ress.srcBuffer, &inSize);
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if (ZBUFFv04_isError(toRead)) EXM_THROW(36, "Decoding error : %s", ZBUFFv04_getErrorName(toRead));
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readSize -= inSize;
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/* Write block */
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sizeCheck = fwrite(ress.dstBuffer, 1, decodedSize, foutput);
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if (sizeCheck != decodedSize) EXM_THROW(37, "Write error : unable to write data block to destination file");
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frameSize += decodedSize;
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DISPLAYUPDATE(2, "\rDecoded : %u MB... ", (U32)(frameSize>>20) );
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if (toRead == 0) break;
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if (readSize) EXM_THROW(38, "Decoding error : should consume entire input");
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/* Fill input buffer */
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if (toRead > ress.srcBufferSize) EXM_THROW(34, "too large block");
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readSize = fread(ress.srcBuffer, 1, toRead, finput);
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if (readSize != toRead) EXM_THROW(35, "Read error");
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}
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FIOv04_freeDResources(ress);
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return frameSize;
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}
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unsigned long long FIO_decompressLegacyFrame(FILE* foutput, FILE* finput, U32 magicNumberLE)
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{
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switch(magicNumberLE)
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{
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case ZSTDv01_magicNumberLE :
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return FIOv01_decompressFrame(foutput, finput);
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case ZSTDv02_magicNumber :
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return FIOv02_decompressFrame(foutput, finput);
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case ZSTDv03_magicNumber :
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return FIOv03_decompressFrame(foutput, finput);
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case ZSTDv04_magicNumber :
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return FIOv04_decompressFrame(FIOv04_createDResources(), foutput, finput);
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default :
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return ERROR(prefix_unknown);
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}
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}
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