812 lines
30 KiB
C
812 lines
30 KiB
C
/*
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fileio.c - File i/o handler for zstd
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Copyright (C) Yann Collet 2013-2016
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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 homepage : http://www.zstd.net
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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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* Tuning options
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***************************************/
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#ifndef ZSTD_LEGACY_SUPPORT
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/* LEGACY_SUPPORT :
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* decompressor can decode older formats (starting from Zstd 0.1+) */
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# define ZSTD_LEGACY_SUPPORT 1
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#endif
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/* *************************************
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* Compiler Options
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***************************************/
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#define _POSIX_SOURCE 1 /* enable %llu on Windows */
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/*-*************************************
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* Includes
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***************************************/
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#include "util.h" /* Compiler options, UTIL_GetFileSize */
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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.h"
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#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_magicNumber, ZSTD_frameHeaderSize_max */
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#include "zstd.h"
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#include "zstd_internal.h" /* MIN, KB, MB */
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#define ZBUFF_STATIC_LINKING_ONLY
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#include "zbuff.h"
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#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1)
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# include "zstd_legacy.h" /* ZSTD_isLegacy */
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# include "fileio_legacy.h" /* FIO_decompressLegacyFrame */
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#endif
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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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# define SET_BINARY_MODE(file) { if (_setmode(_fileno(file), _O_BINARY) == -1) perror("Cannot set _O_BINARY"); }
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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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#endif
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/*-*************************************
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* Constants
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***************************************/
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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 BLOCKSIZE (128 KB)
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#define ROLLBUFFERSIZE (BLOCKSIZE*8*64)
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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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#define MAX_DICT_SIZE (8 MB) /* protection against large input (attack scenario) */
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#define FNSPACE 30
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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 = 2; /* 0 : no display; 1: errors; 2 : + result + interaction + warnings; 3 : + progression; 4 : + information */
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void FIO_setNotificationLevel(unsigned level) { g_displayLevel=level; }
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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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static unsigned FIO_GetMilliSpan(clock_t nPrevious)
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{
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clock_t const nCurrent = clock();
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return (unsigned)(((nCurrent - nPrevious) * 1000) / CLOCKS_PER_SEC);
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}
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/*-*************************************
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* Local Parameters
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***************************************/
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static U32 g_overwrite = 0;
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void FIO_overwriteMode(void) { g_overwrite=1; }
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static U32 g_maxWLog = 23;
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void FIO_setMaxWLog(unsigned maxWLog) { g_maxWLog = maxWLog; }
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static U32 g_sparseFileSupport = 1; /* 0 : no sparse allowed; 1: auto (file yes, stdout no); 2: force sparse */
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void FIO_setSparseWrite(unsigned sparse) { g_sparseFileSupport=sparse; }
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static U32 g_dictIDFlag = 1;
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void FIO_setDictIDFlag(unsigned dictIDFlag) { g_dictIDFlag = dictIDFlag; }
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static U32 g_checksumFlag = 0;
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void FIO_setChecksumFlag(unsigned checksumFlag) { g_checksumFlag = checksumFlag; }
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static U32 g_removeSrcFile = 0;
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void FIO_setRemoveSrcFile(unsigned flag) { g_removeSrcFile = (flag>0); }
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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 FILE* FIO_openSrcFile(const char* srcFileName)
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{
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FILE* f;
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if (!strcmp (srcFileName, stdinmark)) {
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DISPLAYLEVEL(4,"Using stdin for input\n");
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f = stdin;
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SET_BINARY_MODE(stdin);
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} else {
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f = fopen(srcFileName, "rb");
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}
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if ( f==NULL ) DISPLAYLEVEL(1, "zstd: %s: No such file\n", srcFileName);
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return f;
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}
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static FILE* FIO_openDstFile(const char* dstFileName)
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{
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FILE* f;
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if (!strcmp (dstFileName, stdoutmark)) {
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DISPLAYLEVEL(4,"Using stdout for output\n");
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f = stdout;
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SET_BINARY_MODE(stdout);
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if (g_sparseFileSupport==1) {
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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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} else {
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if (!g_overwrite && strcmp (dstFileName, nulmark)) { /* Check if destination file already exists */
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f = fopen( dstFileName, "rb" );
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if (f != 0) { /* dest file exists, prompt for overwrite authorization */
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fclose(f);
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if (g_displayLevel <= 1) {
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/* No interaction possible */
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DISPLAY("zstd: %s already exists; not overwritten \n", dstFileName);
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return 0;
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}
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DISPLAY("zstd: %s already exists; do you wish to overwrite (y/N) ? ", dstFileName);
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{ int ch = getchar();
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if ((ch!='Y') && (ch!='y')) {
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DISPLAY(" not overwritten \n");
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return 0;
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}
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while ((ch!=EOF) && (ch!='\n')) ch = getchar(); /* flush rest of input line */
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} } }
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f = fopen( dstFileName, "wb" );
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}
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return f;
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}
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/*! FIO_loadFile() :
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* creates a buffer, pointed by `*bufferPtr`,
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* loads `filename` content into it,
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* up to MAX_DICT_SIZE bytes.
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* @return : loaded size
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*/
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static size_t FIO_loadFile(void** bufferPtr, const char* fileName)
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{
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FILE* fileHandle;
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U64 fileSize;
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*bufferPtr = NULL;
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if (fileName == NULL) return 0;
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DISPLAYLEVEL(4,"Loading %s as dictionary \n", fileName);
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fileHandle = fopen(fileName, "rb");
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if (fileHandle==0) EXM_THROW(31, "Error opening file %s", fileName);
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fileSize = UTIL_getFileSize(fileName);
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if (fileSize > MAX_DICT_SIZE) {
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int seekResult;
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if (fileSize > 1 GB) EXM_THROW(32, "Dictionary file %s is too large", fileName); /* avoid extreme cases */
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DISPLAYLEVEL(2,"Dictionary %s is too large : using last %u bytes only \n", fileName, MAX_DICT_SIZE);
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seekResult = fseek(fileHandle, (long int)(fileSize-MAX_DICT_SIZE), SEEK_SET); /* use end of file */
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if (seekResult != 0) EXM_THROW(33, "Error seeking into file %s", fileName);
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fileSize = MAX_DICT_SIZE;
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}
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*bufferPtr = (BYTE*)malloc((size_t)fileSize);
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if (*bufferPtr==NULL) EXM_THROW(34, "Allocation error : not enough memory for dictBuffer");
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{ size_t const readSize = fread(*bufferPtr, 1, (size_t)fileSize, fileHandle);
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if (readSize!=fileSize) EXM_THROW(35, "Error reading dictionary file %s", fileName); }
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fclose(fileHandle);
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return (size_t)fileSize;
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}
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#ifndef ZSTD_NOCOMPRESS
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/*-**********************************************************************
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* Compression
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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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void* dictBuffer;
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size_t dictBufferSize;
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ZBUFF_CCtx* ctx;
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FILE* dstFile;
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FILE* srcFile;
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} cRess_t;
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static cRess_t FIO_createCResources(const char* dictFileName)
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{
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cRess_t ress;
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ress.ctx = ZBUFF_createCCtx();
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if (ress.ctx == NULL) EXM_THROW(30, "Allocation error : can't create ZBUFF context");
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/* Allocate Memory */
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ress.srcBufferSize = ZBUFF_recommendedCInSize();
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ress.srcBuffer = malloc(ress.srcBufferSize);
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ress.dstBufferSize = ZBUFF_recommendedCOutSize();
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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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/* dictionary */
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ress.dictBufferSize = FIO_loadFile(&(ress.dictBuffer), dictFileName);
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return ress;
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}
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static void FIO_freeCResources(cRess_t ress)
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{
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size_t 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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errorCode = ZBUFF_freeCCtx(ress.ctx);
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if (ZBUFF_isError(errorCode)) EXM_THROW(38, "Error : can't release ZBUFF context resource : %s", ZBUFF_getErrorName(errorCode));
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}
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/*! FIO_compressFilename_internal() :
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* same as FIO_compressFilename_extRess(), with `ress.desFile` already opened.
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* @return : 0 : compression completed correctly,
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* 1 : missing or pb opening srcFileName
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*/
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static int FIO_compressFilename_internal(cRess_t ress,
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const char* dstFileName, const char* srcFileName,
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int cLevel)
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{
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FILE* const srcFile = ress.srcFile;
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FILE* const dstFile = ress.dstFile;
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U64 readsize = 0;
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U64 compressedfilesize = 0;
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U64 const fileSize = UTIL_getFileSize(srcFileName);
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/* init */
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{ ZSTD_parameters params;
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memset(¶ms, 0, sizeof(params));
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params.cParams = ZSTD_getCParams(cLevel, fileSize, ress.dictBufferSize);
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params.fParams.contentSizeFlag = 1;
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params.fParams.checksumFlag = g_checksumFlag;
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params.fParams.noDictIDFlag = !g_dictIDFlag;
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if ((g_maxWLog) && (params.cParams.windowLog > g_maxWLog)) {
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params.cParams.windowLog = g_maxWLog;
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params.cParams = ZSTD_adjustCParams(params.cParams, fileSize, ress.dictBufferSize);
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}
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{ size_t const errorCode = ZBUFF_compressInit_advanced(ress.ctx, ress.dictBuffer, ress.dictBufferSize, params, fileSize);
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if (ZBUFF_isError(errorCode)) EXM_THROW(21, "Error initializing compression : %s", ZBUFF_getErrorName(errorCode));
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} }
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/* Main compression loop */
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readsize = 0;
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while (1) {
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/* Fill input Buffer */
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size_t const inSize = fread(ress.srcBuffer, (size_t)1, ress.srcBufferSize, srcFile);
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if (inSize==0) break;
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readsize += inSize;
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DISPLAYUPDATE(2, "\rRead : %u MB ", (U32)(readsize>>20));
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{ /* Compress using buffered streaming */
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size_t usedInSize = inSize;
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size_t cSize = ress.dstBufferSize;
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{ size_t const result = ZBUFF_compressContinue(ress.ctx, ress.dstBuffer, &cSize, ress.srcBuffer, &usedInSize);
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if (ZBUFF_isError(result)) EXM_THROW(23, "Compression error : %s ", ZBUFF_getErrorName(result)); }
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if (inSize != usedInSize)
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/* inBuff should be entirely consumed since buffer sizes are recommended ones */
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EXM_THROW(24, "Compression error : input block not fully consumed");
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/* Write cBlock */
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{ size_t const sizeCheck = fwrite(ress.dstBuffer, 1, cSize, dstFile);
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if (sizeCheck!=cSize) EXM_THROW(25, "Write error : cannot write compressed block into %s", dstFileName); }
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compressedfilesize += cSize;
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}
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DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%% ", (U32)(readsize>>20), (double)compressedfilesize/readsize*100);
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}
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/* End of Frame */
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{ size_t cSize = ress.dstBufferSize;
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size_t const result = ZBUFF_compressEnd(ress.ctx, ress.dstBuffer, &cSize);
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if (result!=0) EXM_THROW(26, "Compression error : cannot create frame end");
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{ size_t const sizeCheck = fwrite(ress.dstBuffer, 1, cSize, dstFile);
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if (sizeCheck!=cSize) EXM_THROW(27, "Write error : cannot write frame end into %s", dstFileName); }
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compressedfilesize += cSize;
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}
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/* Status */
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DISPLAYLEVEL(2, "\r%79s\r", "");
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DISPLAYLEVEL(2,"%-20.20s :%6.2f%% (%6llu =>%6llu bytes, %s) \n", srcFileName,
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(double)compressedfilesize/readsize*100, (unsigned long long)readsize, (unsigned long long) compressedfilesize,
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dstFileName);
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return 0;
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}
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/*! FIO_compressFilename_internal() :
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* same as FIO_compressFilename_extRess(), with ress.destFile already opened (typically stdout)
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* @return : 0 : compression completed correctly,
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* 1 : missing or pb opening srcFileName
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*/
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static int FIO_compressFilename_srcFile(cRess_t ress,
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const char* dstFileName, const char* srcFileName,
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int cLevel)
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{
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int result;
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/* File check */
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if (UTIL_isDirectory(srcFileName)) {
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DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName);
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return 1;
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}
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ress.srcFile = FIO_openSrcFile(srcFileName);
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if (!ress.srcFile) return 1; /* srcFile could not be opened */
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result = FIO_compressFilename_internal(ress, dstFileName, srcFileName, cLevel);
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fclose(ress.srcFile);
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if ((g_removeSrcFile) && (!result)) remove(srcFileName);
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return result;
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}
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/*! FIO_compressFilename_dstFile() :
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* @return : 0 : compression completed correctly,
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* 1 : pb
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*/
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static int FIO_compressFilename_dstFile(cRess_t ress,
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const char* dstFileName, const char* srcFileName,
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int cLevel)
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{
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int result;
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ress.dstFile = FIO_openDstFile(dstFileName);
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if (ress.dstFile==0) { fclose(ress.srcFile); return 1; }
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result = FIO_compressFilename_srcFile(ress, dstFileName, srcFileName, cLevel);
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if (fclose(ress.dstFile)) EXM_THROW(28, "Write error : cannot properly close %s", dstFileName);
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if (result!=0) remove(dstFileName); /* remove operation artefact */
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return result;
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}
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int FIO_compressFilename(const char* dstFileName, const char* srcFileName,
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const char* dictFileName, int compressionLevel)
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{
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clock_t const start = clock();
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cRess_t const ress = FIO_createCResources(dictFileName);
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int const issueWithSrcFile = FIO_compressFilename_dstFile(ress, dstFileName, srcFileName, compressionLevel);
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FIO_freeCResources(ress);
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{ double const seconds = (double)(clock() - start) / CLOCKS_PER_SEC;
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DISPLAYLEVEL(4, "Completed in %.2f sec \n", seconds);
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}
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return issueWithSrcFile;
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}
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int FIO_compressMultipleFilenames(const char** inFileNamesTable, unsigned nbFiles,
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const char* suffix,
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const char* dictFileName, int compressionLevel)
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{
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int missed_files = 0;
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char* dstFileName = (char*)malloc(FNSPACE);
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size_t dfnSize = FNSPACE;
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size_t const suffixSize = suffix ? strlen(suffix) : 0;
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cRess_t ress;
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/* init */
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ress = FIO_createCResources(dictFileName);
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/* loop on each file */
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if (!strcmp(suffix, stdoutmark)) {
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unsigned u;
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ress.dstFile = stdout;
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SET_BINARY_MODE(stdout);
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for (u=0; u<nbFiles; u++)
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missed_files += FIO_compressFilename_srcFile(ress, stdoutmark,
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inFileNamesTable[u], compressionLevel);
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if (fclose(ress.dstFile)) EXM_THROW(29, "Write error : cannot properly close %s", stdoutmark);
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} else {
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unsigned u;
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for (u=0; u<nbFiles; u++) {
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size_t ifnSize = strlen(inFileNamesTable[u]);
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if (dfnSize <= ifnSize+suffixSize+1) { free(dstFileName); dfnSize = ifnSize + 20; dstFileName = (char*)malloc(dfnSize); }
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strcpy(dstFileName, inFileNamesTable[u]);
|
|
strcat(dstFileName, suffix);
|
|
missed_files += FIO_compressFilename_dstFile(ress, dstFileName,
|
|
inFileNamesTable[u], compressionLevel);
|
|
} }
|
|
|
|
/* Close & Free */
|
|
FIO_freeCResources(ress);
|
|
free(dstFileName);
|
|
|
|
return missed_files;
|
|
}
|
|
|
|
#endif /* #ifndef ZSTD_NOCOMPRESS */
|
|
|
|
|
|
|
|
#ifndef ZSTD_NODECOMPRESS
|
|
|
|
/* **************************************************************************
|
|
* Decompression
|
|
****************************************************************************/
|
|
typedef struct {
|
|
void* srcBuffer;
|
|
size_t srcBufferSize;
|
|
void* dstBuffer;
|
|
size_t dstBufferSize;
|
|
void* dictBuffer;
|
|
size_t dictBufferSize;
|
|
ZBUFF_DCtx* dctx;
|
|
FILE* dstFile;
|
|
} dRess_t;
|
|
|
|
static dRess_t FIO_createDResources(const char* dictFileName)
|
|
{
|
|
dRess_t ress;
|
|
|
|
/* init */
|
|
ress.dctx = ZBUFF_createDCtx();
|
|
if (ress.dctx==NULL) EXM_THROW(60, "Can't create ZBUFF decompression context");
|
|
|
|
/* Allocate Memory */
|
|
ress.srcBufferSize = ZBUFF_recommendedDInSize();
|
|
ress.srcBuffer = malloc(ress.srcBufferSize);
|
|
ress.dstBufferSize = ZBUFF_recommendedDOutSize();
|
|
ress.dstBuffer = malloc(ress.dstBufferSize);
|
|
if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(61, "Allocation error : not enough memory");
|
|
|
|
/* dictionary */
|
|
ress.dictBufferSize = FIO_loadFile(&(ress.dictBuffer), dictFileName);
|
|
|
|
return ress;
|
|
}
|
|
|
|
static void FIO_freeDResources(dRess_t ress)
|
|
{
|
|
size_t const errorCode = ZBUFF_freeDCtx(ress.dctx);
|
|
if (ZBUFF_isError(errorCode)) EXM_THROW(69, "Error : can't free ZBUFF context resource : %s", ZBUFF_getErrorName(errorCode));
|
|
free(ress.srcBuffer);
|
|
free(ress.dstBuffer);
|
|
free(ress.dictBuffer);
|
|
}
|
|
|
|
|
|
/** FIO_fwriteSparse() :
|
|
* @return : storedSkips, to be provided to next call to FIO_fwriteSparse() of LZ4IO_fwriteSparseEnd() */
|
|
static unsigned FIO_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 */
|
|
size_t bufferSizeT = bufferSize / sizeof(size_t);
|
|
const size_t* const bufferTEnd = bufferT + bufferSizeT;
|
|
const size_t* ptrT = bufferT;
|
|
static const size_t segmentSizeT = (32 KB) / sizeof(size_t); /* 0-test re-attempted every 32 KB */
|
|
|
|
if (!g_sparseFileSupport) { /* normal write */
|
|
size_t const 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 const 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;
|
|
|
|
/* count leading zeros */
|
|
if (seg0SizeT > bufferSizeT) seg0SizeT = bufferSizeT;
|
|
bufferSizeT -= seg0SizeT;
|
|
for (nb0T=0; (nb0T < seg0SizeT) && (ptrT[nb0T] == 0); nb0T++) ;
|
|
storedSkips += (unsigned)(nb0T * sizeof(size_t));
|
|
|
|
if (nb0T != seg0SizeT) { /* not all 0s */
|
|
int const seekResult = fseek(file, storedSkips, SEEK_CUR);
|
|
if (seekResult) EXM_THROW(72, "Sparse skip error ; try --no-sparse");
|
|
storedSkips = 0;
|
|
seg0SizeT -= nb0T;
|
|
ptrT += nb0T;
|
|
{ size_t const sizeCheck = fwrite(ptrT, sizeof(size_t), seg0SizeT, file);
|
|
if (sizeCheck != seg0SizeT) EXM_THROW(73, "Write error : cannot write decoded block");
|
|
} }
|
|
ptrT += seg0SizeT;
|
|
}
|
|
|
|
{ static size_t const maskT = sizeof(size_t)-1;
|
|
if (bufferSize & maskT) { /* size not multiple of sizeof(size_t) : 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) {
|
|
int seekResult = fseek(file, storedSkips, SEEK_CUR);
|
|
if (seekResult) EXM_THROW(74, "Sparse skip error ; try --no-sparse");
|
|
storedSkips = 0;
|
|
{ size_t const 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 FIO_fwriteSparseEnd(FILE* file, unsigned storedSkips)
|
|
{
|
|
if (storedSkips-->0) { /* implies g_sparseFileSupport>0 */
|
|
int const seekResult = fseek(file, storedSkips, SEEK_CUR);
|
|
if (seekResult != 0) EXM_THROW(69, "Final skip error (sparse file)\n");
|
|
{ const char lastZeroByte[1] = { 0 };
|
|
size_t const sizeCheck = fwrite(lastZeroByte, 1, 1, file);
|
|
if (sizeCheck != 1) EXM_THROW(69, "Write error : cannot write last zero\n");
|
|
} }
|
|
}
|
|
|
|
/** FIO_decompressFrame() :
|
|
@return : size of decoded frame
|
|
*/
|
|
unsigned long long FIO_decompressFrame(dRess_t ress,
|
|
FILE* foutput, FILE* finput, size_t alreadyLoaded)
|
|
{
|
|
U64 frameSize = 0;
|
|
size_t readSize;
|
|
U32 storedSkips = 0;
|
|
|
|
ZBUFF_decompressInitDictionary(ress.dctx, ress.dictBuffer, ress.dictBufferSize);
|
|
|
|
/* Header loading (optional, saves one loop) */
|
|
{ size_t const toLoad = 9 - alreadyLoaded; /* assumption : 9 >= alreadyLoaded */
|
|
size_t const loadedSize = fread(((char*)ress.srcBuffer) + alreadyLoaded, 1, toLoad, finput);
|
|
readSize = alreadyLoaded + loadedSize;
|
|
}
|
|
|
|
/* Main decompression Loop */
|
|
while (1) {
|
|
size_t inSize=readSize, decodedSize=ress.dstBufferSize;
|
|
size_t const toRead = ZBUFF_decompressContinue(ress.dctx, ress.dstBuffer, &decodedSize, ress.srcBuffer, &inSize);
|
|
if (ZBUFF_isError(toRead)) EXM_THROW(36, "Decoding error : %s", ZBUFF_getErrorName(toRead));
|
|
readSize -= inSize;
|
|
|
|
/* Write block */
|
|
storedSkips = FIO_fwriteSparse(foutput, ress.dstBuffer, decodedSize, storedSkips);
|
|
frameSize += decodedSize;
|
|
DISPLAYUPDATE(2, "\rDecoded : %u MB... ", (U32)(frameSize>>20) );
|
|
|
|
if (toRead == 0) break; /* end of frame */
|
|
if (readSize) EXM_THROW(38, "Decoding error : should consume entire input");
|
|
|
|
/* Fill input buffer */
|
|
if (toRead > ress.srcBufferSize) EXM_THROW(34, "too large block");
|
|
readSize = fread(ress.srcBuffer, 1, toRead, finput);
|
|
if (readSize != toRead)
|
|
EXM_THROW(35, "Read error");
|
|
}
|
|
|
|
FIO_fwriteSparseEnd(foutput, storedSkips);
|
|
|
|
return frameSize;
|
|
}
|
|
|
|
|
|
/** FIO_passThrough() : just copy input into output, for compatibility with gzip -df mode
|
|
@return : 0 (no error) */
|
|
static unsigned FIO_passThrough(FILE* foutput, FILE* finput, void* buffer, size_t bufferSize)
|
|
{
|
|
size_t const blockSize = MIN (64 KB, bufferSize);
|
|
size_t readFromInput = 1;
|
|
unsigned storedSkips = 0;
|
|
|
|
/* assumption : first 4 bytes already loaded (magic number detection), and stored within buffer */
|
|
{ size_t const sizeCheck = fwrite(buffer, 1, 4, foutput);
|
|
if (sizeCheck != 4) EXM_THROW(50, "Pass-through write error"); }
|
|
|
|
while (readFromInput) {
|
|
readFromInput = fread(buffer, 1, blockSize, finput);
|
|
storedSkips = FIO_fwriteSparse(foutput, buffer, readFromInput, storedSkips);
|
|
}
|
|
|
|
FIO_fwriteSparseEnd(foutput, storedSkips);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/** FIO_decompressSrcFile() :
|
|
Decompression `srcFileName` into `ress.dstFile`
|
|
@return : 0 : OK
|
|
1 : operation not started
|
|
*/
|
|
static int FIO_decompressSrcFile(dRess_t ress, const char* srcFileName)
|
|
{
|
|
unsigned long long filesize = 0;
|
|
FILE* const dstFile = ress.dstFile;
|
|
FILE* srcFile;
|
|
|
|
if (UTIL_isDirectory(srcFileName)) {
|
|
DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName);
|
|
return 1;
|
|
}
|
|
srcFile = FIO_openSrcFile(srcFileName);
|
|
if (srcFile==0) return 1;
|
|
|
|
/* for each frame */
|
|
for ( ; ; ) {
|
|
/* check magic number -> version */
|
|
size_t const toRead = 4;
|
|
size_t const sizeCheck = fread(ress.srcBuffer, (size_t)1, toRead, srcFile);
|
|
if (sizeCheck==0) break; /* no more input */
|
|
if (sizeCheck != toRead) EXM_THROW(31, "zstd: %s read error : cannot read header", srcFileName);
|
|
{ U32 const magic = MEM_readLE32(ress.srcBuffer);
|
|
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1)
|
|
if (ZSTD_isLegacy(magic)) {
|
|
filesize += FIO_decompressLegacyFrame(dstFile, srcFile, ress.dictBuffer, ress.dictBufferSize, magic);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (((magic & 0xFFFFFFF0U) != ZSTD_MAGIC_SKIPPABLE_START) && (magic != ZSTD_MAGICNUMBER)) {
|
|
if (g_overwrite) /* -df : pass-through mode */
|
|
return FIO_passThrough(dstFile, srcFile, ress.srcBuffer, ress.srcBufferSize);
|
|
else {
|
|
DISPLAYLEVEL(1, "zstd: %s: not in zstd format \n", srcFileName);
|
|
return 1;
|
|
} } }
|
|
filesize += FIO_decompressFrame(ress, dstFile, srcFile, toRead);
|
|
}
|
|
|
|
/* Final Status */
|
|
DISPLAYLEVEL(2, "\r%79s\r", "");
|
|
DISPLAYLEVEL(2, "%-20.20s: %llu bytes \n", srcFileName, filesize);
|
|
|
|
/* Close */
|
|
fclose(srcFile);
|
|
if (g_removeSrcFile) remove(srcFileName);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/** FIO_decompressFile_extRess() :
|
|
decompress `srcFileName` into `dstFileName`
|
|
@return : 0 : OK
|
|
1 : operation aborted (src not available, dst already taken, etc.)
|
|
*/
|
|
static int FIO_decompressDstFile(dRess_t ress,
|
|
const char* dstFileName, const char* srcFileName)
|
|
{
|
|
int result;
|
|
ress.dstFile = FIO_openDstFile(dstFileName);
|
|
if (ress.dstFile==0) return 1;
|
|
|
|
result = FIO_decompressSrcFile(ress, srcFileName);
|
|
|
|
if (fclose(ress.dstFile)) EXM_THROW(38, "Write error : cannot properly close %s", dstFileName);
|
|
if (result != 0) remove(dstFileName);
|
|
return result;
|
|
}
|
|
|
|
|
|
int FIO_decompressFilename(const char* dstFileName, const char* srcFileName,
|
|
const char* dictFileName)
|
|
{
|
|
int missingFiles = 0;
|
|
dRess_t ress = FIO_createDResources(dictFileName);
|
|
|
|
missingFiles += FIO_decompressDstFile(ress, dstFileName, srcFileName);
|
|
|
|
FIO_freeDResources(ress);
|
|
return missingFiles;
|
|
}
|
|
|
|
|
|
#define MAXSUFFIXSIZE 8
|
|
int FIO_decompressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
|
|
const char* suffix,
|
|
const char* dictFileName)
|
|
{
|
|
int skippedFiles = 0;
|
|
int missingFiles = 0;
|
|
dRess_t ress = FIO_createDResources(dictFileName);
|
|
|
|
if (!strcmp(suffix, stdoutmark) || !strcmp(suffix, nulmark)) {
|
|
unsigned u;
|
|
ress.dstFile = FIO_openDstFile(suffix);
|
|
if (ress.dstFile == 0) EXM_THROW(71, "cannot open %s", suffix);
|
|
for (u=0; u<nbFiles; u++)
|
|
missingFiles += FIO_decompressSrcFile(ress, srcNamesTable[u]);
|
|
if (fclose(ress.dstFile)) EXM_THROW(39, "Write error : cannot properly close %s", stdoutmark);
|
|
} else {
|
|
size_t const suffixSize = suffix ? strlen(suffix) : 0;
|
|
size_t dfnSize = FNSPACE;
|
|
unsigned u;
|
|
char* dstFileName = (char*)malloc(FNSPACE);
|
|
if (dstFileName==NULL) EXM_THROW(70, "not enough memory for dstFileName");
|
|
for (u=0; u<nbFiles; u++) { /* create dstFileName */
|
|
const char* const srcFileName = srcNamesTable[u];
|
|
size_t const sfnSize = strlen(srcFileName);
|
|
const char* const suffixPtr = srcFileName + sfnSize - suffixSize;
|
|
if (dfnSize+suffixSize <= sfnSize+1) {
|
|
free(dstFileName);
|
|
dfnSize = sfnSize + 20;
|
|
dstFileName = (char*)malloc(dfnSize);
|
|
if (dstFileName==NULL) EXM_THROW(71, "not enough memory for dstFileName");
|
|
}
|
|
if (sfnSize <= suffixSize || strcmp(suffixPtr, suffix) != 0) {
|
|
DISPLAYLEVEL(1, "zstd: %s: unknown suffix (%4s expected) -- ignored \n", srcFileName, suffix);
|
|
skippedFiles++;
|
|
continue;
|
|
}
|
|
memcpy(dstFileName, srcFileName, sfnSize - suffixSize);
|
|
dstFileName[sfnSize-suffixSize] = '\0';
|
|
|
|
missingFiles += FIO_decompressDstFile(ress, dstFileName, srcFileName);
|
|
}
|
|
free(dstFileName);
|
|
}
|
|
|
|
FIO_freeDResources(ress);
|
|
return missingFiles + skippedFiles;
|
|
}
|
|
|
|
#endif /* #ifndef ZSTD_NODECOMPRESS */
|