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zstd/programs/fileio.c
Yann Collet a85a8dd94a Fixed #80 (reported by @luben) 
Added : tests for ZSTD_LEGACY=disable build mode
extended ZSTD_LEGACY=disable to dll build
2015-11-30 11:53:11 +01:00

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/*
fileio.c - File i/o handler
Copyright (C) Yann Collet 2013-2015
GPL v2 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
You can contact the author at :
- zstd source repository : https://github.com/Cyan4973/zstd
- Public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/*
Note : this is stand-alone program.
It is not part of ZSTD compression library, it is a user program of ZSTD library.
The license of ZSTD library is BSD.
The license of this file is GPLv2.
*/
/* *************************************
* Tuning options
***************************************/
#ifndef ZSTD_LEGACY_SUPPORT
/**LEGACY_SUPPORT :
* decompressor can decode older formats (starting from Zstd 0.1+) */
# define ZSTD_LEGACY_SUPPORT 1
#endif
/* *************************************
* Compiler Options
***************************************/
/* Disable some Visual warning messages */
#ifdef _MSC_VER
# define _CRT_SECURE_NO_WARNINGS
# define _CRT_SECURE_NO_DEPRECATE /* VS2005 */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
#endif
#define _FILE_OFFSET_BITS 64 /* Large file support on 32-bits unix */
#define _POSIX_SOURCE 1 /* enable fileno() within <stdio.h> on unix */
/* *************************************
* Includes
***************************************/
#include <stdio.h> /* fprintf, fopen, fread, _fileno, stdin, stdout */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* strcmp, strlen */
#include <time.h> /* clock */
#include <errno.h> /* errno */
#include <sys/types.h> /* stat64 */
#include <sys/stat.h> /* stat64 */
#include "mem.h"
#include "fileio.h"
#include "zstd_static.h" /* ZSTD_magicNumber */
#include "zstd_buffered_static.h"
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1)
# include "zstd_legacy.h" /* legacy */
# include "fileio_legacy.h" /* legacy */
#endif
/* *************************************
* OS-specific Includes
***************************************/
#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__)
# include <fcntl.h> /* _O_BINARY */
# include <io.h> /* _setmode, _isatty */
# ifdef __MINGW32__
// int _fileno(FILE *stream); /* seems no longer useful /* MINGW somehow forgets to include this windows declaration into <stdio.h> */
# endif
# define SET_BINARY_MODE(file) { int unused = _setmode(_fileno(file), _O_BINARY); (void)unused; }
# define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
#else
# include <unistd.h> /* isatty */
# define SET_BINARY_MODE(file)
# define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
#endif
#if !defined(S_ISREG)
# define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
#endif
/* *************************************
* Constants
***************************************/
#define KB *(1U<<10)
#define MB *(1U<<20)
#define GB *(1U<<30)
#define _1BIT 0x01
#define _2BITS 0x03
#define _3BITS 0x07
#define _4BITS 0x0F
#define _6BITS 0x3F
#define _8BITS 0xFF
#define BIT6 0x40
#define BIT7 0x80
#define BLOCKSIZE (128 KB)
#define ROLLBUFFERSIZE (BLOCKSIZE*8*64)
#define FIO_FRAMEHEADERSIZE 5 /* as a define, because needed to allocated table on stack */
#define FSE_CHECKSUM_SEED 0
#define CACHELINE 64
/* *************************************
* Macros
***************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static U32 g_displayLevel = 2; /* 0 : no display; 1: errors; 2 : + result + interaction + warnings; 3 : + progression; 4 : + information */
#define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
if ((FIO_GetMilliSpan(g_time) > refreshRate) || (g_displayLevel>=4)) \
{ g_time = clock(); DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stdout); } }
static const unsigned refreshRate = 150;
static clock_t g_time = 0;
/* *************************************
* Local Parameters
***************************************/
static U32 g_overwrite = 0;
void FIO_overwriteMode(void) { g_overwrite=1; }
void FIO_setNotificationLevel(unsigned level) { g_displayLevel=level; }
/* *************************************
* Exceptions
***************************************/
#ifndef DEBUG
# define DEBUG 0
#endif
#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
#define EXM_THROW(error, ...) \
{ \
DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "Error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, "\n"); \
exit(error); \
}
/* *************************************
* Functions
***************************************/
static unsigned FIO_GetMilliSpan(clock_t nPrevious)
{
clock_t nCurrent = clock();
unsigned nSpan = (unsigned)(((nCurrent - nPrevious) * 1000) / CLOCKS_PER_SEC);
return nSpan;
}
static void FIO_getFileHandles(FILE** pfinput, FILE** pfoutput, const char* input_filename, const char* output_filename)
{
if (!strcmp (input_filename, stdinmark))
{
DISPLAYLEVEL(4,"Using stdin for input\n");
*pfinput = stdin;
SET_BINARY_MODE(stdin);
}
else
{
*pfinput = fopen(input_filename, "rb");
}
if (!strcmp (output_filename, stdoutmark))
{
DISPLAYLEVEL(4,"Using stdout for output\n");
*pfoutput = stdout;
SET_BINARY_MODE(stdout);
}
else
{
/* Check if destination file already exists */
*pfoutput=0;
if (strcmp(output_filename,nulmark)) *pfoutput = fopen( output_filename, "rb" );
if (*pfoutput!=0)
{
fclose(*pfoutput);
if (!g_overwrite)
{
char ch;
if (g_displayLevel <= 1) /* No interaction possible */
EXM_THROW(11, "Operation aborted : %s already exists", output_filename);
DISPLAYLEVEL(2, "Warning : %s already exists\n", output_filename);
DISPLAYLEVEL(2, "Overwrite ? (Y/N) : ");
ch = (char)getchar();
if ((ch!='Y') && (ch!='y')) EXM_THROW(11, "Operation aborted : %s already exists", output_filename);
}
}
*pfoutput = fopen( output_filename, "wb" );
}
if ( *pfinput==0 ) EXM_THROW(12, "Pb opening src : %s", input_filename);
if ( *pfoutput==0) EXM_THROW(13, "Pb opening dst : %s", output_filename);
}
static U64 FIO_getFileSize(const char* infilename)
{
int r;
#if defined(_MSC_VER)
struct _stat64 statbuf;
r = _stat64(infilename, &statbuf);
#else
struct stat statbuf;
r = stat(infilename, &statbuf);
#endif
if (r || !S_ISREG(statbuf.st_mode)) return 0;
return (U64)statbuf.st_size;
}
unsigned long long FIO_compressFilename(const char* output_filename, const char* input_filename, int cLevel)
{
U64 filesize = 0;
U64 compressedfilesize = 0;
BYTE* inBuff;
BYTE* outBuff;
size_t inBuffSize = ZBUFF_recommendedCInSize();
size_t outBuffSize = ZBUFF_recommendedCOutSize();
FILE* finput;
FILE* foutput;
size_t sizeCheck, errorCode;
ZBUFF_CCtx* ctx;
/* Allocate Memory */
ctx = ZBUFF_createCCtx();
inBuff = (BYTE*)malloc(inBuffSize);
outBuff = (BYTE*)malloc(outBuffSize);
if (!inBuff || !outBuff || !ctx) EXM_THROW(21, "Allocation error : not enough memory");
/* init */
FIO_getFileHandles(&finput, &foutput, input_filename, output_filename);
filesize = FIO_getFileSize(input_filename);
errorCode = ZBUFF_compressInit_advanced(ctx, ZSTD_getParams(cLevel, filesize));
if (ZBUFF_isError(errorCode)) EXM_THROW(22, "Error initializing compression");
filesize = 0;
/* Main compression loop */
while (1)
{
size_t inSize;
/* Fill input Buffer */
inSize = fread(inBuff, (size_t)1, inBuffSize, finput);
if (inSize==0) break;
filesize += inSize;
DISPLAYUPDATE(2, "\rRead : %u MB ", (U32)(filesize>>20));
{
/* Compress (buffered streaming ensures appropriate formatting) */
size_t usedInSize = inSize;
size_t cSize = outBuffSize;
size_t result = ZBUFF_compressContinue(ctx, outBuff, &cSize, inBuff, &usedInSize);
if (ZBUFF_isError(result))
EXM_THROW(23, "Compression error : %s ", ZBUFF_getErrorName(result));
if (inSize != usedInSize)
/* inBuff should be entirely consumed since buffer sizes are recommended ones */
EXM_THROW(24, "Compression error : input block not fully consumed");
/* Write cBlock */
sizeCheck = fwrite(outBuff, 1, cSize, foutput);
if (sizeCheck!=cSize) EXM_THROW(25, "Write error : cannot write compressed block into %s", output_filename);
compressedfilesize += cSize;
}
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%% ", (U32)(filesize>>20), (double)compressedfilesize/filesize*100);
}
/* End of Frame */
{
size_t cSize = outBuffSize;
size_t result = ZBUFF_compressEnd(ctx, outBuff, &cSize);
if (result!=0) EXM_THROW(26, "Compression error : cannot create frame end");
sizeCheck = fwrite(outBuff, 1, cSize, foutput);
if (sizeCheck!=cSize) EXM_THROW(27, "Write error : cannot write frame end into %s", output_filename);
compressedfilesize += cSize;
}
/* Status */
DISPLAYLEVEL(2, "\r%79s\r", "");
DISPLAYLEVEL(2,"Compressed %llu bytes into %llu bytes ==> %.2f%%\n",
(unsigned long long) filesize, (unsigned long long) compressedfilesize, (double)compressedfilesize/filesize*100);
/* clean */
free(inBuff);
free(outBuff);
ZBUFF_freeCCtx(ctx);
fclose(finput);
if (fclose(foutput)) EXM_THROW(28, "Write error : cannot properly close %s", output_filename);
return compressedfilesize;
}
unsigned long long FIO_decompressFrame(FILE* foutput, FILE* finput,
BYTE* inBuff, size_t inBuffSize, size_t alreadyLoaded,
BYTE* outBuff, size_t outBuffSize,
ZBUFF_DCtx* dctx)
{
U64 frameSize = 0;
size_t readSize=alreadyLoaded;
/* Main decompression Loop */
ZBUFF_decompressInit(dctx);
while (1)
{
/* Decode */
size_t sizeCheck;
size_t inSize=readSize, decodedSize=outBuffSize;
size_t inStart=0;
size_t toRead = ZBUFF_decompressContinue(dctx, outBuff, &decodedSize, inBuff+inStart, &inSize);
if (ZBUFF_isError(toRead)) EXM_THROW(36, "Decoding error : %s", ZBUFF_getErrorName(toRead));
readSize -= inSize;
inStart += inSize;
/* Write block */
sizeCheck = fwrite(outBuff, 1, decodedSize, foutput);
if (sizeCheck != decodedSize) EXM_THROW(37, "Write error : unable to write data block to destination file");
frameSize += decodedSize;
DISPLAYUPDATE(2, "\rDecoded : %u MB... ", (U32)(frameSize>>20) );
if (toRead == 0) break;
if (readSize) continue; /* still some data left within inBuff */
/* Fill input buffer */
if (toRead > inBuffSize) EXM_THROW(34, "too large block");
readSize = fread(inBuff, 1, toRead, finput);
if (readSize != toRead) EXM_THROW(35, "Read error");
}
return frameSize;
}
unsigned long long FIO_decompressFilename(const char* output_filename, const char* input_filename)
{
FILE* finput, *foutput;
BYTE* inBuff=NULL;
size_t inBuffSize = ZBUFF_recommendedDInSize();
BYTE* outBuff=NULL;
size_t outBuffSize = ZBUFF_recommendedDOutSize();
U64 filesize = 0;
size_t toRead;
/* Init */
ZBUFF_DCtx* dctx = ZBUFF_createDCtx();
FIO_getFileHandles(&finput, &foutput, input_filename, output_filename);
/* Allocate Memory (if needed) */
inBuff = (BYTE*)malloc(inBuffSize);
outBuff = (BYTE*)malloc(outBuffSize);
if (!inBuff || !outBuff) EXM_THROW(33, "Allocation error : not enough memory");
/* for each frame */
for ( ; ; )
{
size_t sizeCheck;
/* check magic number -> version */
toRead = 4;
sizeCheck = fread(inBuff, (size_t)1, toRead, finput);
if (sizeCheck==0) break; /* no more input */
if (sizeCheck != toRead) EXM_THROW(31, "Read error : cannot read header");
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1)
if (ZSTD_isLegacy(MEM_readLE32(inBuff)))
{
filesize += FIO_decompressLegacyFrame(foutput, finput, MEM_readLE32(inBuff));
continue;
}
#endif /* ZSTD_LEGACY_SUPPORT */
filesize += FIO_decompressFrame(foutput, finput, inBuff, inBuffSize, toRead, outBuff, outBuffSize, dctx);
}
DISPLAYLEVEL(2, "\r%79s\r", "");
DISPLAYLEVEL(2, "Decoded %llu bytes \n", (long long unsigned)filesize);
/* clean */
free(inBuff);
free(outBuff);
ZBUFF_freeDCtx(dctx);
fclose(finput);
if (fclose(foutput)) EXM_THROW(38, "Write error : cannot properly close %s", output_filename);
return filesize;
}
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