AuroraMiddleware/lz4
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
133a50b780
lz4/programs/lz4io.c
Yann Collet 133a50b780 fixed DISPLAYUPDATE() 
wrong comparison, which was always overflowing (hence was always true)
except when it was not (i386, reported by pmc)
in which case it would never show any information.
2018-04-06 14:16:23 -07:00

1157 lines
41 KiB
C
Raw Blame History

/*
LZ4io.c - LZ4 File/Stream Interface
Copyright (C) Yann Collet 2011-2017
GPL v2 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
You can contact the author at :
- LZ4 source repository : https://github.com/lz4/lz4
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/*
Note : this is stand-alone program.
It is not part of LZ4 compression library, it is a user code of the LZ4 library.
- The license of LZ4 library is BSD.
- The license of xxHash library is BSD.
- The license of this source file is GPLv2.
*/
/*-************************************
* Compiler options
**************************************/
#ifdef _MSC_VER /* Visual Studio */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
#endif
#if defined(__MINGW32__) && !defined(_POSIX_SOURCE)
# define _POSIX_SOURCE 1 /* disable %llu warnings with MinGW on Windows */
#endif
/*****************************
* Includes
*****************************/
#include "platform.h" /* Large File Support, SET_BINARY_MODE, SET_SPARSE_FILE_MODE, PLATFORM_POSIX_VERSION, __64BIT__ */
#include "util.h" /* UTIL_getFileStat, UTIL_setFileStat */
#include <stdio.h> /* fprintf, fopen, fread, stdin, stdout, fflush, getchar */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* strerror, strcmp, strlen */
#include <time.h> /* clock */
#include <sys/types.h> /* stat64 */
#include <sys/stat.h> /* stat64 */
#include "lz4io.h"
#include "lz4.h" /* still required for legacy format */
#include "lz4hc.h" /* still required for legacy format */
#include "lz4frame.h"
#include "lz4frame_static.h"
/*****************************
* Constants
*****************************/
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
#define _1BIT 0x01
#define _2BITS 0x03
#define _3BITS 0x07
#define _4BITS 0x0F
#define _8BITS 0xFF
#define MAGICNUMBER_SIZE 4
#define LZ4IO_MAGICNUMBER 0x184D2204
#define LZ4IO_SKIPPABLE0 0x184D2A50
#define LZ4IO_SKIPPABLEMASK 0xFFFFFFF0
#define LEGACY_MAGICNUMBER 0x184C2102
#define CACHELINE 64
#define LEGACY_BLOCKSIZE (8 MB)
#define MIN_STREAM_BUFSIZE (192 KB)
#define LZ4IO_BLOCKSIZEID_DEFAULT 7
#define LZ4_MAX_DICT_SIZE (64 KB)
/**************************************
* Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static int g_displayLevel = 0; /* 0 : no display ; 1: errors ; 2 : + result + interaction + warnings ; 3 : + progression; 4 : + information */
#define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
if ( ((clock() - g_time) > refreshRate) \
|| (g_displayLevel>=4) ) { \
g_time = clock(); \
DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stderr); \
} }
static const clock_t refreshRate = CLOCKS_PER_SEC / 6;
static clock_t g_time = 0;
/**************************************
* Local Parameters
**************************************/
static int g_overwrite = 1;
static int g_testMode = 0;
static int g_blockSizeId = LZ4IO_BLOCKSIZEID_DEFAULT;
static int g_blockChecksum = 0;
static int g_streamChecksum = 1;
static int g_blockIndependence = 1;
static int g_sparseFileSupport = 1;
static int g_contentSizeFlag = 0;
static int g_useDictionary = 0;
static const char* g_dictionaryFilename = NULL;
/**************************************
* Exceptions
***************************************/
#ifndef DEBUG
# define DEBUG 0
#endif
#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
#define EXM_THROW(error, ...) \
{ \
DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "Error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, " \n"); \
exit(error); \
}
/**************************************
* Version modifiers
**************************************/
#define EXTENDED_ARGUMENTS
#define EXTENDED_HELP
#define EXTENDED_FORMAT
#define DEFAULT_DECOMPRESSOR LZ4IO_decompressLZ4F
/* ************************************************** */
/* ****************** Parameters ******************** */
/* ************************************************** */
int LZ4IO_setDictionaryFilename(const char* dictionaryFilename) {
g_dictionaryFilename = dictionaryFilename;
g_useDictionary = dictionaryFilename != NULL;
return g_useDictionary;
}
/* Default setting : overwrite = 1; return : overwrite mode (0/1) */
int LZ4IO_setOverwrite(int yes)
{
g_overwrite = (yes!=0);
return g_overwrite;
}
/* Default setting : testMode = 0; return : testMode (0/1) */
int LZ4IO_setTestMode(int yes)
{
g_testMode = (yes!=0);
return g_testMode;
}
/* blockSizeID : valid values : 4-5-6-7 */
size_t LZ4IO_setBlockSizeID(unsigned bsid)
{
static const size_t blockSizeTable[] = { 64 KB, 256 KB, 1 MB, 4 MB };
static const unsigned minBlockSizeID = 4;
static const unsigned maxBlockSizeID = 7;
if ((bsid < minBlockSizeID) || (bsid > maxBlockSizeID)) return 0;
g_blockSizeId = bsid;
return blockSizeTable[g_blockSizeId-minBlockSizeID];
}
int LZ4IO_setBlockMode(LZ4IO_blockMode_t blockMode)
{
g_blockIndependence = (blockMode == LZ4IO_blockIndependent);
return g_blockIndependence;
}
/* Default setting : no block checksum */
int LZ4IO_setBlockChecksumMode(int enable)
{
g_blockChecksum = (enable != 0);
return g_blockChecksum;
}
/* Default setting : checksum enabled */
int LZ4IO_setStreamChecksumMode(int enable)
{
g_streamChecksum = (enable != 0);
return g_streamChecksum;
}
/* Default setting : 0 (no notification) */
int LZ4IO_setNotificationLevel(int level)
{
g_displayLevel = level;
return g_displayLevel;
}
/* Default setting : 0 (disabled) */
int LZ4IO_setSparseFile(int enable)
{
g_sparseFileSupport = (enable!=0);
return g_sparseFileSupport;
}
/* Default setting : 0 (disabled) */
int LZ4IO_setContentSize(int enable)
{
g_contentSizeFlag = (enable!=0);
return g_contentSizeFlag;
}
static U32 g_removeSrcFile = 0;
void LZ4IO_setRemoveSrcFile(unsigned flag) { g_removeSrcFile = (flag>0); }
/* ************************************************************************ **
** ********************** LZ4 File / Pipe compression ********************* **
** ************************************************************************ */
static int LZ4IO_GetBlockSize_FromBlockId (int id) { return (1 << (8 + (2 * id))); }
static int LZ4IO_isSkippableMagicNumber(unsigned int magic) {
return (magic & LZ4IO_SKIPPABLEMASK) == LZ4IO_SKIPPABLE0;
}
/** LZ4IO_openSrcFile() :
* condition : `srcFileName` must be non-NULL.
* @result : FILE* to `dstFileName`, or NULL if it fails */
static FILE* LZ4IO_openSrcFile(const char* srcFileName)
{
FILE* f;
if (!strcmp (srcFileName, stdinmark)) {
DISPLAYLEVEL(4,"Using stdin for input\n");
f = stdin;
SET_BINARY_MODE(stdin);
} else {
f = fopen(srcFileName, "rb");
if ( f==NULL ) DISPLAYLEVEL(1, "%s: %s \n", srcFileName, strerror(errno));
}
return f;
}
/** FIO_openDstFile() :
* condition : `dstFileName` must be non-NULL.
* @result : FILE* to `dstFileName`, or NULL if it fails */
static FILE* LZ4IO_openDstFile(const char* dstFileName)
{
FILE* f;
if (!strcmp (dstFileName, stdoutmark)) {
DISPLAYLEVEL(4,"Using stdout for output\n");
f = stdout;
SET_BINARY_MODE(stdout);
if (g_sparseFileSupport==1) {
g_sparseFileSupport = 0;
DISPLAYLEVEL(4, "Sparse File Support is automatically disabled on stdout ; try --sparse \n");
}
} else {
if (!g_overwrite && strcmp (dstFileName, nulmark)) { /* Check if destination file already exists */
f = fopen( dstFileName, "rb" );
if (f != NULL) { /* dest exists, prompt for overwrite authorization */
fclose(f);
if (g_displayLevel <= 1) { /* No interaction possible */
DISPLAY("%s already exists; not overwritten \n", dstFileName);
return NULL;
}
DISPLAY("%s already exists; do you wish to overwrite (y/N) ? ", dstFileName);
{ int ch = getchar();
if ((ch!='Y') && (ch!='y')) {
DISPLAY(" not overwritten \n");
return NULL;
}
while ((ch!=EOF) && (ch!='\n')) ch = getchar(); /* flush rest of input line */
} } }
f = fopen( dstFileName, "wb" );
if (f==NULL) DISPLAYLEVEL(1, "%s: %s\n", dstFileName, strerror(errno));
}
/* sparse file */
if (f && g_sparseFileSupport) { SET_SPARSE_FILE_MODE(f); }
return f;
}
/***************************************
* Legacy Compression
***************************************/
/* unoptimized version; solves endianess & alignment issues */
static void LZ4IO_writeLE32 (void* p, unsigned value32)
{
unsigned char* const dstPtr = (unsigned char*)p;
dstPtr[0] = (unsigned char)value32;
dstPtr[1] = (unsigned char)(value32 >> 8);
dstPtr[2] = (unsigned char)(value32 >> 16);
dstPtr[3] = (unsigned char)(value32 >> 24);
}
static int LZ4IO_LZ4_compress(const char* src, char* dst, int srcSize, int dstSize, int cLevel)
{
(void)cLevel;
return LZ4_compress_fast(src, dst, srcSize, dstSize, 1);
}
/* LZ4IO_compressFilename_Legacy :
* This function is intentionally "hidden" (not published in .h)
* It generates compressed streams using the old 'legacy' format */
int LZ4IO_compressFilename_Legacy(const char* input_filename, const char* output_filename, int compressionlevel)
{
int (*compressionFunction)(const char* src, char* dst, int srcSize, int dstSize, int cLevel);
unsigned long long filesize = 0;
unsigned long long compressedfilesize = MAGICNUMBER_SIZE;
char* in_buff;
char* out_buff;
const int outBuffSize = LZ4_compressBound(LEGACY_BLOCKSIZE);
FILE* finput;
FILE* foutput;
clock_t clockEnd;
/* Init */
clock_t const clockStart = clock();
compressionFunction = (compressionlevel < 3) ? LZ4IO_LZ4_compress : LZ4_compress_HC;
finput = LZ4IO_openSrcFile(input_filename);
if (finput == NULL) EXM_THROW(20, "%s : open file error ", input_filename);
foutput = LZ4IO_openDstFile(output_filename);
if (foutput == NULL) { fclose(finput); EXM_THROW(20, "%s : open file error ", input_filename); }
/* Allocate Memory */
in_buff = (char*)malloc(LEGACY_BLOCKSIZE);
out_buff = (char*)malloc(outBuffSize);
if (!in_buff || !out_buff) EXM_THROW(21, "Allocation error : not enough memory");
/* Write Archive Header */
LZ4IO_writeLE32(out_buff, LEGACY_MAGICNUMBER);
{ size_t const sizeCheck = fwrite(out_buff, 1, MAGICNUMBER_SIZE, foutput);
if (sizeCheck != MAGICNUMBER_SIZE) EXM_THROW(22, "Write error : cannot write header"); }
/* Main Loop */
while (1) {
unsigned int outSize;
/* Read Block */
size_t const inSize = (int) fread(in_buff, (size_t)1, (size_t)LEGACY_BLOCKSIZE, finput);
if (inSize == 0) break;
if (inSize > LEGACY_BLOCKSIZE) EXM_THROW(23, "Read error : wrong fread() size report "); /* should be impossible */
filesize += inSize;
/* Compress Block */
outSize = compressionFunction(in_buff, out_buff+4, (int)inSize, outBuffSize, compressionlevel);
compressedfilesize += outSize+4;
DISPLAYUPDATE(2, "\rRead : %i MB ==> %.2f%% ",
(int)(filesize>>20), (double)compressedfilesize/filesize*100);
/* Write Block */
LZ4IO_writeLE32(out_buff, outSize);
{ size_t const sizeCheck = fwrite(out_buff, 1, outSize+4, foutput);
if (sizeCheck!=(size_t)(outSize+4))
EXM_THROW(24, "Write error : cannot write compressed block");
} }
if (ferror(finput)) EXM_THROW(25, "Error while reading %s ", input_filename);
/* Status */
clockEnd = clock();
if (clockEnd==clockStart) clockEnd+=1; /* avoid division by zero (speed) */
filesize += !filesize; /* avoid division by zero (ratio) */
DISPLAYLEVEL(2, "\r%79s\r", ""); /* blank line */
DISPLAYLEVEL(2,"Compressed %llu bytes into %llu bytes ==> %.2f%%\n",
filesize, compressedfilesize, (double)compressedfilesize / filesize * 100);
{ double const seconds = (double)(clockEnd - clockStart) / CLOCKS_PER_SEC;
DISPLAYLEVEL(4,"Done in %.2f s ==> %.2f MB/s\n", seconds,
(double)filesize / seconds / 1024 / 1024);
}
/* Close & Free */
free(in_buff);
free(out_buff);
fclose(finput);
fclose(foutput);
return 0;
}
/*********************************************
* Compression using Frame format
*********************************************/
typedef struct {
void* srcBuffer;
size_t srcBufferSize;
void* dstBuffer;
size_t dstBufferSize;
LZ4F_compressionContext_t ctx;
LZ4F_CDict* cdict;
} cRess_t;
static void* LZ4IO_createDict(const char* dictFilename, size_t *dictSize) {
size_t readSize;
size_t dictEnd = 0;
size_t dictLen = 0;
size_t dictStart;
size_t circularBufSize = LZ4_MAX_DICT_SIZE;
char* circularBuf;
char* dictBuf;
FILE* dictFile;
if (!dictFilename) EXM_THROW(25, "Dictionary error : no filename provided");
circularBuf = (char *) malloc(circularBufSize);
if (!circularBuf) EXM_THROW(25, "Allocation error : not enough memory");
dictFile = LZ4IO_openSrcFile(dictFilename);
if (!dictFile) EXM_THROW(25, "Dictionary error : could not open dictionary file");
/* opportunistically seek to the part of the file we care about. If this */
/* fails it's not a problem since we'll just read everything anyways. */
if (strcmp(dictFilename, stdinmark)) {
(void)UTIL_fseek(dictFile, -LZ4_MAX_DICT_SIZE, SEEK_END);
}
do {
readSize = fread(circularBuf + dictEnd, 1, circularBufSize - dictEnd, dictFile);
dictEnd = (dictEnd + readSize) % circularBufSize;
dictLen += readSize;
} while (readSize>0);
if (dictLen > LZ4_MAX_DICT_SIZE) {
dictLen = LZ4_MAX_DICT_SIZE;
}
*dictSize = dictLen;
dictStart = (circularBufSize + dictEnd - dictLen) % circularBufSize;
if (dictStart == 0) {
/* We're in the simple case where the dict starts at the beginning of our circular buffer. */
dictBuf = circularBuf;
circularBuf = NULL;
} else {
/* Otherwise, we will alloc a new buffer and copy our dict into that. */
dictBuf = (char *) malloc(dictLen ? dictLen : 1);
if (!dictBuf) EXM_THROW(25, "Allocation error : not enough memory");
memcpy(dictBuf, circularBuf + dictStart, circularBufSize - dictStart);
memcpy(dictBuf + circularBufSize - dictStart, circularBuf, dictLen - (circularBufSize - dictStart));
}
fclose(dictFile);
free(circularBuf);
return dictBuf;
}
static LZ4F_CDict* LZ4IO_createCDict(void) {
size_t dictionarySize;
void* dictionaryBuffer;
LZ4F_CDict* cdict;
if (!g_useDictionary) {
return NULL;
}
dictionaryBuffer = LZ4IO_createDict(g_dictionaryFilename, &dictionarySize);
if (!dictionaryBuffer) EXM_THROW(25, "Dictionary error : could not create dictionary");
cdict = LZ4F_createCDict(dictionaryBuffer, dictionarySize);
free(dictionaryBuffer);
return cdict;
}
static cRess_t LZ4IO_createCResources(void)
{
const size_t blockSize = (size_t)LZ4IO_GetBlockSize_FromBlockId (g_blockSizeId);
cRess_t ress;
LZ4F_errorCode_t const errorCode = LZ4F_createCompressionContext(&(ress.ctx), LZ4F_VERSION);
if (LZ4F_isError(errorCode)) EXM_THROW(30, "Allocation error : can't create LZ4F context : %s", LZ4F_getErrorName(errorCode));
/* Allocate Memory */
ress.srcBuffer = malloc(blockSize);
ress.srcBufferSize = blockSize;
ress.dstBufferSize = LZ4F_compressFrameBound(blockSize, NULL); /* cover worst case */
ress.dstBuffer = malloc(ress.dstBufferSize);
if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(31, "Allocation error : not enough memory");
ress.cdict = LZ4IO_createCDict();
return ress;
}
static void LZ4IO_freeCResources(cRess_t ress)
{
free(ress.srcBuffer);
free(ress.dstBuffer);
LZ4F_freeCDict(ress.cdict);
ress.cdict = NULL;
{ LZ4F_errorCode_t const errorCode = LZ4F_freeCompressionContext(ress.ctx);
if (LZ4F_isError(errorCode)) EXM_THROW(38, "Error : can't free LZ4F context resource : %s", LZ4F_getErrorName(errorCode)); }
}
/*
* LZ4IO_compressFilename_extRess()
* result : 0 : compression completed correctly
* 1 : missing or pb opening srcFileName
*/
static int LZ4IO_compressFilename_extRess(cRess_t ress, const char* srcFileName, const char* dstFileName, int compressionLevel)
{
unsigned long long filesize = 0;
unsigned long long compressedfilesize = 0;
FILE* srcFile;
FILE* dstFile;
void* const srcBuffer = ress.srcBuffer;
void* const dstBuffer = ress.dstBuffer;
const size_t dstBufferSize = ress.dstBufferSize;
const size_t blockSize = (size_t)LZ4IO_GetBlockSize_FromBlockId (g_blockSizeId);
size_t readSize;
LZ4F_compressionContext_t ctx = ress.ctx; /* just a pointer */
LZ4F_preferences_t prefs;
/* Init */
srcFile = LZ4IO_openSrcFile(srcFileName);
if (srcFile == NULL) return 1;
dstFile = LZ4IO_openDstFile(dstFileName);
if (dstFile == NULL) { fclose(srcFile); return 1; }
memset(&prefs, 0, sizeof(prefs));
/* Set compression parameters */
prefs.autoFlush = 1;
prefs.compressionLevel = compressionLevel;
prefs.frameInfo.blockMode = (LZ4F_blockMode_t)g_blockIndependence;
prefs.frameInfo.blockSizeID = (LZ4F_blockSizeID_t)g_blockSizeId;
prefs.frameInfo.blockChecksumFlag = (LZ4F_blockChecksum_t)g_blockChecksum;
prefs.frameInfo.contentChecksumFlag = (LZ4F_contentChecksum_t)g_streamChecksum;
if (g_contentSizeFlag) {
U64 const fileSize = UTIL_getFileSize(srcFileName);
prefs.frameInfo.contentSize = fileSize; /* == 0 if input == stdin */
if (fileSize==0)
DISPLAYLEVEL(3, "Warning : cannot determine input content size \n");
}
/* read first block */
readSize = fread(srcBuffer, (size_t)1, blockSize, srcFile);
if (ferror(srcFile)) EXM_THROW(30, "Error reading %s ", srcFileName);
filesize += readSize;
/* single-block file */
if (readSize < blockSize) {
/* Compress in single pass */
size_t cSize = LZ4F_compressFrame_usingCDict(ctx, dstBuffer, dstBufferSize, srcBuffer, readSize, ress.cdict, &prefs);
if (LZ4F_isError(cSize)) EXM_THROW(31, "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 */
{ size_t const sizeCheck = fwrite(dstBuffer, 1, cSize, dstFile);
if (sizeCheck!=cSize) EXM_THROW(32, "Write error : cannot write compressed block");
} }
else
/* multiple-blocks file */
{
/* Write Archive Header */
size_t headerSize = LZ4F_compressBegin_usingCDict(ctx, dstBuffer, dstBufferSize, ress.cdict, &prefs);
if (LZ4F_isError(headerSize)) EXM_THROW(33, "File header generation failed : %s", LZ4F_getErrorName(headerSize));
{ size_t const sizeCheck = fwrite(dstBuffer, 1, headerSize, dstFile);
if (sizeCheck!=headerSize) EXM_THROW(34, "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(35, "Compression failed : %s", LZ4F_getErrorName(outSize));
compressedfilesize += outSize;
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%% ", (unsigned)(filesize>>20), (double)compressedfilesize/filesize*100);
/* Write Block */
{ size_t const sizeCheck = fwrite(dstBuffer, 1, outSize, dstFile);
if (sizeCheck!=outSize) EXM_THROW(36, "Write error : cannot write compressed block"); }
/* Read next block */
readSize = fread(srcBuffer, (size_t)1, (size_t)blockSize, srcFile);
filesize += readSize;
}
if (ferror(srcFile)) EXM_THROW(37, "Error reading %s ", srcFileName);
/* End of Stream mark */
headerSize = LZ4F_compressEnd(ctx, dstBuffer, dstBufferSize, NULL);
if (LZ4F_isError(headerSize)) EXM_THROW(38, "End of file generation failed : %s", LZ4F_getErrorName(headerSize));
{ size_t const sizeCheck = fwrite(dstBuffer, 1, headerSize, dstFile);
if (sizeCheck!=headerSize) EXM_THROW(39, "Write error : cannot write end of stream"); }
compressedfilesize += headerSize;
}
/* Release files */
fclose (srcFile);
fclose (dstFile);
/* Copy owner, file permissions and modification time */
{ stat_t statbuf;
if (strcmp (srcFileName, stdinmark) && strcmp (dstFileName, stdoutmark) && strcmp (dstFileName, nulmark) && UTIL_getFileStat(srcFileName, &statbuf))
UTIL_setFileStat(dstFileName, &statbuf);
}
if (g_removeSrcFile) { if (remove(srcFileName)) EXM_THROW(40, "Remove error : %s: %s", srcFileName, strerror(errno)); } /* remove source file : --rm */
/* 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 const start = clock();
cRess_t const ress = LZ4IO_createCResources();
int const issueWithSrcFile = LZ4IO_compressFilename_extRess(ress, srcFileName, dstFileName, compressionLevel);
/* Free resources */
LZ4IO_freeCResources(ress);
/* Final Status */
{ clock_t const end = clock();
double const 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;
if (dstFileName == NULL) return ifntSize; /* not enough memory */
ress = LZ4IO_createCResources();
/* loop on each file */
for (i=0; i<ifntSize; i++) {
size_t const ifnSize = strlen(inFileNamesTable[i]);
if (ofnSize <= ifnSize+suffixSize+1) { free(dstFileName); ofnSize = ifnSize + 20; dstFileName = (char*)malloc(ofnSize); if (dstFileName==NULL) { LZ4IO_freeCResources(ress); return ifntSize; } }
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* const 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 sizeT = sizeof(size_t);
const size_t maskT = sizeT -1 ;
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;
const size_t segmentSizeT = (32 KB) / sizeT;
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 = UTIL_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 * sizeT);
if (nb0T != seg0SizeT) { /* not all 0s */
errno = 0;
{ int const seekResult = UTIL_fseek(file, storedSkips, SEEK_CUR);
if (seekResult) EXM_THROW(72, "Sparse skip error(%d): %s ; try --no-sparse", (int)errno, strerror(errno));
}
storedSkips = 0;
seg0SizeT -= nb0T;
ptrT += nb0T;
{ size_t const 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 const restSize = bufferSize & maskT;
const char* const restEnd = restStart + restSize;
for (; (restPtr < restEnd) && (*restPtr == 0); restPtr++) ;
storedSkips += (unsigned) (restPtr - restStart);
if (restPtr != restEnd) {
int const seekResult = UTIL_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 LZ4IO_fwriteSparseEnd(FILE* file, unsigned storedSkips)
{
if (storedSkips>0) { /* implies g_sparseFileSupport>0 */
int const seekResult = UTIL_fseek(file, storedSkips-1, 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");
} }
}
static unsigned g_magicRead = 0; /* out-parameter of LZ4IO_decodeLegacyStream() */
static unsigned long long LZ4IO_decodeLegacyStream(FILE* finput, FILE* foutput)
{
unsigned long long streamSize = 0;
unsigned storedSkips = 0;
/* Allocate Memory */
char* const in_buff = (char*)malloc(LZ4_compressBound(LEGACY_BLOCKSIZE));
char* const out_buff = (char*)malloc(LEGACY_BLOCKSIZE);
if (!in_buff || !out_buff) EXM_THROW(51, "Allocation error : not enough memory");
/* Main Loop */
while (1) {
unsigned int blockSize;
/* Block Size */
{ size_t const sizeCheck = fread(in_buff, 1, 4, finput);
if (sizeCheck == 0) break; /* Nothing to read : file read is completed */
if (sizeCheck != 4) EXM_THROW(52, "Read error : cannot access block size "); }
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 */
{ size_t const sizeCheck = fread(in_buff, 1, blockSize, finput);
if (sizeCheck!=blockSize) EXM_THROW(52, "Read error : cannot access compressed block !"); }
/* Decode Block */
{ int const decodeSize = LZ4_decompress_safe(in_buff, out_buff, blockSize, LEGACY_BLOCKSIZE);
if (decodeSize < 0) EXM_THROW(53, "Decoding Failed ! Corrupted input detected !");
streamSize += decodeSize;
/* Write Block */
storedSkips = LZ4IO_fwriteSparse(foutput, out_buff, decodeSize, storedSkips); /* success or die */
} }
if (ferror(finput)) EXM_THROW(54, "Read error : ferror");
LZ4IO_fwriteSparseEnd(foutput, storedSkips);
/* Free */
free(in_buff);
free(out_buff);
return streamSize;
}
typedef struct {
void* srcBuffer;
size_t srcBufferSize;
void* dstBuffer;
size_t dstBufferSize;
FILE* dstFile;
LZ4F_decompressionContext_t dCtx;
void* dictBuffer;
size_t dictBufferSize;
} dRess_t;
static void LZ4IO_loadDDict(dRess_t* ress) {
if (!g_useDictionary) {
ress->dictBuffer = NULL;
ress->dictBufferSize = 0;
return;
}
ress->dictBuffer = LZ4IO_createDict(g_dictionaryFilename, &ress->dictBufferSize);
if (!ress->dictBuffer) EXM_THROW(25, "Dictionary error : could not create dictionary");
}
static const size_t LZ4IO_dBufferSize = 64 KB;
static dRess_t LZ4IO_createDResources(void)
{
dRess_t ress;
/* init */
LZ4F_errorCode_t const 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");
LZ4IO_loadDDict(&ress);
ress.dstFile = NULL;
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);
free(ress.dictBuffer);
}
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_usingDict(ress.dCtx, ress.dstBuffer, &outSize, ress.srcBuffer, &inSize, ress.dictBuffer, ress.dictBufferSize, 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; /* reached end of 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_usingDict(ress.dCtx, ress.dstBuffer, &decodedBytes, (char*)(ress.srcBuffer)+pos, &remaining, ress.dictBuffer, ress.dictBufferSize, NULL);
if (LZ4F_isError(nextToLoad)) EXM_THROW(66, "Decompression error : %s", LZ4F_getErrorName(nextToLoad));
pos += remaining;
/* Write Block */
if (decodedBytes) {
if (!g_testMode)
storedSkips = LZ4IO_fwriteSparse(dstFile, ress.dstBuffer, decodedBytes, storedSkips);
filesize += decodedBytes;
DISPLAYUPDATE(2, "\rDecompressed : %u MB ", (unsigned)(filesize>>20));
}
if (!nextToLoad) break;
}
}
/* can be out because readSize == 0, which could be an fread() error */
if (ferror(srcFile)) EXM_THROW(67, "Read error");
if (!g_testMode) LZ4IO_fwriteSparseEnd(dstFile, storedSkips);
if (nextToLoad!=0) EXM_THROW(68, "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 readBytes = 1;
unsigned long long total = MAGICNUMBER_SIZE;
unsigned storedSkips = 0;
size_t const sizeCheck = fwrite(MNstore, 1, MAGICNUMBER_SIZE, foutput);
if (sizeCheck != MAGICNUMBER_SIZE) EXM_THROW(50, "Pass-through write error");
while (readBytes) {
readBytes = fread(buffer, 1, PTSIZE, finput);
total += readBytes;
storedSkips = LZ4IO_fwriteSparse(foutput, buffer, readBytes, storedSkips);
}
if (ferror(finput)) EXM_THROW(51, "Read Error");
LZ4IO_fwriteSparseEnd(foutput, storedSkips);
return total;
}
/** Safely handle cases when (unsigned)offset > LONG_MAX */
static int fseek_u32(FILE *fp, unsigned offset, int where)
{
const unsigned stepMax = 1U << 30;
int errorNb = 0;
if (where != SEEK_CUR) return -1; /* Only allows SEEK_CUR */
while (offset > 0) {
unsigned s = offset;
if (s > stepMax) s = stepMax;
errorNb = UTIL_fseek(fp, (long) s, SEEK_CUR);
if (errorNb != 0) break;
offset -= s;
}
return errorNb;
}
#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;
static unsigned nbFrames = 0;
/* init */
nbFrames++;
/* Check Archive Header */
if (g_magicRead) { /* magic number already read from finput (see legacy frame)*/
magicNumber = g_magicRead;
g_magicRead = 0;
} else {
size_t const nbReadBytes = fread(MNstore, 1, MAGICNUMBER_SIZE, finput);
if (nbReadBytes==0) { nbFrames = 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");
{ size_t const nbReadBytes = fread(MNstore, 1, 4, finput);
if (nbReadBytes != 4)
EXM_THROW(42, "Stream error : skippable size unreadable");
}
{ unsigned const size = LZ4IO_readLE32(MNstore);
int const errorNb = fseek_u32(finput, size, SEEK_CUR);
if (errorNb != 0)
EXM_THROW(43, "Stream error : cannot skip skippable area");
}
return 0;
EXTENDED_FORMAT; /* macro extension for custom formats */
default:
if (nbFrames == 1) { /* just started */
/* Wrong magic number at the beginning of 1st stream */
if (!g_testMode && g_overwrite) {
nbFrames = 0;
return LZ4IO_passThrough(finput, foutput, MNstore);
}
EXM_THROW(44,"Unrecognized header : file cannot be decoded");
}
{ long int const position = ftell(finput); /* only works for files < 2 GB */
DISPLAYLEVEL(2, "Stream followed by undecodable data ");
if (position != -1L)
DISPLAYLEVEL(2, "at position %i ", (int)position);
DISPLAYLEVEL(2, "\n");
}
return ENDOFSTREAM;
}
}
static int LZ4IO_decompressSrcFile(dRess_t ress, const char* input_filename, const char* output_filename)
{
FILE* const foutput = ress.dstFile;
unsigned long long filesize = 0;
/* Init */
FILE* const finput = LZ4IO_openSrcFile(input_filename);
if (finput==NULL) return 1;
/* Loop over multiple streams */
for ( ; ; ) { /* endless loop, see break condition */
unsigned long long const decodedSize =
selectDecoder(ress, finput, foutput);
if (decodedSize == ENDOFSTREAM) break;
filesize += decodedSize;
}
/* Close input */
fclose(finput);
if (g_removeSrcFile) { /* --rm */
if (remove(input_filename))
EXM_THROW(45, "Remove error : %s: %s", input_filename, strerror(errno));
}
/* Final Status */
DISPLAYLEVEL(2, "\r%79s\r", "");
DISPLAYLEVEL(2, "%-20.20s : decoded %llu bytes \n", input_filename, filesize);
(void)output_filename;
return 0;
}
static int LZ4IO_decompressDstFile(dRess_t ress, const char* input_filename, const char* output_filename)
{
stat_t statbuf;
int stat_result = 0;
FILE* const foutput = LZ4IO_openDstFile(output_filename);
if (foutput==NULL) return 1; /* failure */
if ( strcmp(input_filename, stdinmark)
&& UTIL_getFileStat(input_filename, &statbuf))
stat_result = 1;
ress.dstFile = foutput;
LZ4IO_decompressSrcFile(ress, input_filename, output_filename);
fclose(foutput);
/* Copy owner, file permissions and modification time */
if ( stat_result != 0
&& strcmp (output_filename, stdoutmark)
&& strcmp (output_filename, nulmark)) {
UTIL_setFileStat(output_filename, &statbuf);
/* should return value be read ? or is silent fail good enough ? */
}
return 0;
}
int LZ4IO_decompressFilename(const char* input_filename, const char* output_filename)
{
dRess_t const ress = LZ4IO_createDResources();
clock_t const start = clock();
int const missingFiles = LZ4IO_decompressDstFile(ress, input_filename, output_filename);
clock_t const end = clock();
double const seconds = (double)(end - start) / CLOCKS_PER_SEC;
DISPLAYLEVEL(4, "Done in %.2f sec \n", seconds);
LZ4IO_freeDResources(ress);
return missingFiles;
}
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;
size_t const suffixSize = strlen(suffix);
dRess_t ress = LZ4IO_createDResources();
if (outFileName==NULL) return ifntSize; /* not enough memory */
ress.dstFile = LZ4IO_openDstFile(stdoutmark);
for (i=0; i<ifntSize; i++) {
size_t const ifnSize = strlen(inFileNamesTable[i]);
const char* const suffixPtr = inFileNamesTable[i] + ifnSize - suffixSize;
if (!strcmp(suffix, stdoutmark)) {
missingFiles += LZ4IO_decompressSrcFile(ress, inFileNamesTable[i], stdoutmark);
continue;
}
if (ofnSize <= ifnSize-suffixSize+1) { free(outFileName); ofnSize = ifnSize + 20; outFileName = (char*)malloc(ofnSize); if (outFileName==NULL) return ifntSize; }
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_decompressDstFile(ress, inFileNamesTable[i], outFileName);
}
LZ4IO_freeDResources(ress);
free(outFileName);
return missingFiles + skippedFiles;
}
Reference in New Issue View Git Blame Copy Permalink