blob: d72879d64eaecb262963ca0acc023b7a9bfc9954 [file] [log] [blame]
/*
* Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
/* *************************************
* Compiler Options
***************************************/
#ifdef _MSC_VER /* Visual */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
# pragma warning(disable : 4204) /* non-constant aggregate initializer */
#endif
#if defined(__MINGW32__) && !defined(_POSIX_SOURCE)
# define _POSIX_SOURCE 1 /* disable %llu warnings with MinGW on Windows */
#endif
/*-*************************************
* Includes
***************************************/
#include "platform.h" /* Large Files support, SET_BINARY_MODE */
#include "util.h" /* UTIL_getFileSize, UTIL_isRegularFile, UTIL_isSameFile */
#include <stdio.h> /* fprintf, fopen, fread, _fileno, stdin, stdout */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* strcmp, strlen */
#include <assert.h>
#include <errno.h> /* errno */
#include <limits.h> /* INT_MAX */
#include <signal.h>
#include "timefn.h" /* UTIL_getTime, UTIL_clockSpanMicro */
#if defined (_MSC_VER)
# include <sys/stat.h>
# include <io.h>
#endif
#include "../lib/common/mem.h" /* U32, U64 */
#include "fileio.h"
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_magicNumber, ZSTD_frameHeaderSize_max */
#include "../lib/zstd.h"
#include "../lib/common/zstd_errors.h" /* ZSTD_error_frameParameter_windowTooLarge */
#include "../lib/compress/zstd_compress_internal.h"
#if defined(ZSTD_GZCOMPRESS) || defined(ZSTD_GZDECOMPRESS)
# include <zlib.h>
# if !defined(z_const)
# define z_const
# endif
#endif
#if defined(ZSTD_LZMACOMPRESS) || defined(ZSTD_LZMADECOMPRESS)
# include <lzma.h>
#endif
#define LZ4_MAGICNUMBER 0x184D2204
#if defined(ZSTD_LZ4COMPRESS) || defined(ZSTD_LZ4DECOMPRESS)
# define LZ4F_ENABLE_OBSOLETE_ENUMS
# include <lz4frame.h>
# include <lz4.h>
#endif
/*-*************************************
* Constants
***************************************/
#define ADAPT_WINDOWLOG_DEFAULT 23 /* 8 MB */
#define DICTSIZE_MAX (32 MB) /* protection against large input (attack scenario) */
#define FNSPACE 30
/*-*************************************
* Macros
***************************************/
struct FIO_display_prefs_s {
int displayLevel; /* 0 : no display; 1: errors; 2: + result + interaction + warnings; 3: + progression; 4: + information */
U32 noProgress;
};
static FIO_display_prefs_t g_display_prefs = {2, 0};
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYOUT(...) fprintf(stdout, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) { if (g_display_prefs.displayLevel>=l) { DISPLAY(__VA_ARGS__); } }
static const U64 g_refreshRate = SEC_TO_MICRO / 6;
static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;
#define READY_FOR_UPDATE() (!g_display_prefs.noProgress && UTIL_clockSpanMicro(g_displayClock) > g_refreshRate)
#define DELAY_NEXT_UPDATE() { g_displayClock = UTIL_getTime(); }
#define DISPLAYUPDATE(l, ...) { \
if (g_display_prefs.displayLevel>=l && !g_display_prefs.noProgress) { \
if (READY_FOR_UPDATE() || (g_display_prefs.displayLevel>=4)) { \
DELAY_NEXT_UPDATE(); \
DISPLAY(__VA_ARGS__); \
if (g_display_prefs.displayLevel>=4) fflush(stderr); \
} } }
#undef MIN /* in case it would be already defined */
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define EXM_THROW(error, ...) \
{ \
DISPLAYLEVEL(1, "zstd: "); \
DISPLAYLEVEL(5, "Error defined at %s, line %i : \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, " \n"); \
exit(error); \
}
#define CHECK_V(v, f) \
v = f; \
if (ZSTD_isError(v)) { \
DISPLAYLEVEL(5, "%s \n", #f); \
EXM_THROW(11, "%s", ZSTD_getErrorName(v)); \
}
#define CHECK(f) { size_t err; CHECK_V(err, f); }
/*-************************************
* Signal (Ctrl-C trapping)
**************************************/
static const char* g_artefact = NULL;
static void INThandler(int sig)
{
assert(sig==SIGINT); (void)sig;
#if !defined(_MSC_VER)
signal(sig, SIG_IGN); /* this invocation generates a buggy warning in Visual Studio */
#endif
if (g_artefact) {
assert(UTIL_isRegularFile(g_artefact));
remove(g_artefact);
}
DISPLAY("\n");
exit(2);
}
static void addHandler(char const* dstFileName)
{
if (UTIL_isRegularFile(dstFileName)) {
g_artefact = dstFileName;
signal(SIGINT, INThandler);
} else {
g_artefact = NULL;
}
}
/* Idempotent */
static void clearHandler(void)
{
if (g_artefact) signal(SIGINT, SIG_DFL);
g_artefact = NULL;
}
/*-*********************************************************
* Termination signal trapping (Print debug stack trace)
***********************************************************/
#if defined(__has_feature) && !defined(BACKTRACE_ENABLE) /* Clang compiler */
# if (__has_feature(address_sanitizer))
# define BACKTRACE_ENABLE 0
# endif /* __has_feature(address_sanitizer) */
#elif defined(__SANITIZE_ADDRESS__) && !defined(BACKTRACE_ENABLE) /* GCC compiler */
# define BACKTRACE_ENABLE 0
#endif
#if !defined(BACKTRACE_ENABLE)
/* automatic detector : backtrace enabled by default on linux+glibc and osx */
# if (defined(__linux__) && (defined(__GLIBC__) && !defined(__UCLIBC__))) \
|| (defined(__APPLE__) && defined(__MACH__))
# define BACKTRACE_ENABLE 1
# else
# define BACKTRACE_ENABLE 0
# endif
#endif
/* note : after this point, BACKTRACE_ENABLE is necessarily defined */
#if BACKTRACE_ENABLE
#include <execinfo.h> /* backtrace, backtrace_symbols */
#define MAX_STACK_FRAMES 50
static void ABRThandler(int sig) {
const char* name;
void* addrlist[MAX_STACK_FRAMES];
char** symbollist;
int addrlen, i;
switch (sig) {
case SIGABRT: name = "SIGABRT"; break;
case SIGFPE: name = "SIGFPE"; break;
case SIGILL: name = "SIGILL"; break;
case SIGINT: name = "SIGINT"; break;
case SIGSEGV: name = "SIGSEGV"; break;
default: name = "UNKNOWN";
}
DISPLAY("Caught %s signal, printing stack:\n", name);
/* Retrieve current stack addresses. */
addrlen = backtrace(addrlist, MAX_STACK_FRAMES);
if (addrlen == 0) {
DISPLAY("\n");
return;
}
/* Create readable strings to each frame. */
symbollist = backtrace_symbols(addrlist, addrlen);
/* Print the stack trace, excluding calls handling the signal. */
for (i = ZSTD_START_SYMBOLLIST_FRAME; i < addrlen; i++) {
DISPLAY("%s\n", symbollist[i]);
}
free(symbollist);
/* Reset and raise the signal so default handler runs. */
signal(sig, SIG_DFL);
raise(sig);
}
#endif
void FIO_addAbortHandler()
{
#if BACKTRACE_ENABLE
signal(SIGABRT, ABRThandler);
signal(SIGFPE, ABRThandler);
signal(SIGILL, ABRThandler);
signal(SIGSEGV, ABRThandler);
signal(SIGBUS, ABRThandler);
#endif
}
/*-************************************************************
* Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW
***************************************************************/
#if defined(_MSC_VER) && _MSC_VER >= 1400
# define LONG_SEEK _fseeki64
# define LONG_TELL _ftelli64
#elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */
# define LONG_SEEK fseeko
# define LONG_TELL ftello
#elif defined(__MINGW32__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS) && defined(__MSVCRT__)
# define LONG_SEEK fseeko64
# define LONG_TELL ftello64
#elif defined(_WIN32) && !defined(__DJGPP__)
# include <windows.h>
static int LONG_SEEK(FILE* file, __int64 offset, int origin) {
LARGE_INTEGER off;
DWORD method;
off.QuadPart = offset;
if (origin == SEEK_END)
method = FILE_END;
else if (origin == SEEK_CUR)
method = FILE_CURRENT;
else
method = FILE_BEGIN;
if (SetFilePointerEx((HANDLE) _get_osfhandle(_fileno(file)), off, NULL, method))
return 0;
else
return -1;
}
static __int64 LONG_TELL(FILE* file) {
LARGE_INTEGER off, newOff;
off.QuadPart = 0;
newOff.QuadPart = 0;
SetFilePointerEx((HANDLE) _get_osfhandle(_fileno(file)), off, &newOff, FILE_CURRENT);
return newOff.QuadPart;
}
#else
# define LONG_SEEK fseek
# define LONG_TELL ftell
#endif
/*-*************************************
* Parameters: FIO_prefs_t
***************************************/
/* typedef'd to FIO_prefs_t within fileio.h */
struct FIO_prefs_s {
/* Algorithm preferences */
FIO_compressionType_t compressionType;
U32 sparseFileSupport; /* 0: no sparse allowed; 1: auto (file yes, stdout no); 2: force sparse */
int dictIDFlag;
int checksumFlag;
int blockSize;
int overlapLog;
U32 adaptiveMode;
int rsyncable;
int minAdaptLevel;
int maxAdaptLevel;
int ldmFlag;
int ldmHashLog;
int ldmMinMatch;
int ldmBucketSizeLog;
int ldmHashRateLog;
size_t streamSrcSize;
size_t targetCBlockSize;
int srcSizeHint;
int testMode;
ZSTD_literalCompressionMode_e literalCompressionMode;
/* IO preferences */
U32 removeSrcFile;
U32 overwrite;
/* Computation resources preferences */
unsigned memLimit;
int nbWorkers;
int excludeCompressedFiles;
int patchFromMode;
int contentSize;
};
/*-*************************************
* Parameters: Initialization
***************************************/
#define FIO_OVERLAP_LOG_NOTSET 9999
#define FIO_LDM_PARAM_NOTSET 9999
FIO_prefs_t* FIO_createPreferences(void)
{
FIO_prefs_t* const ret = (FIO_prefs_t*)malloc(sizeof(FIO_prefs_t));
if (!ret) EXM_THROW(21, "Allocation error : not enough memory");
ret->compressionType = FIO_zstdCompression;
ret->overwrite = 0;
ret->sparseFileSupport = ZSTD_SPARSE_DEFAULT;
ret->dictIDFlag = 1;
ret->checksumFlag = 1;
ret->removeSrcFile = 0;
ret->memLimit = 0;
ret->nbWorkers = 1;
ret->blockSize = 0;
ret->overlapLog = FIO_OVERLAP_LOG_NOTSET;
ret->adaptiveMode = 0;
ret->rsyncable = 0;
ret->minAdaptLevel = -50; /* initializing this value requires a constant, so ZSTD_minCLevel() doesn't work */
ret->maxAdaptLevel = 22; /* initializing this value requires a constant, so ZSTD_maxCLevel() doesn't work */
ret->ldmFlag = 0;
ret->ldmHashLog = 0;
ret->ldmMinMatch = 0;
ret->ldmBucketSizeLog = FIO_LDM_PARAM_NOTSET;
ret->ldmHashRateLog = FIO_LDM_PARAM_NOTSET;
ret->streamSrcSize = 0;
ret->targetCBlockSize = 0;
ret->srcSizeHint = 0;
ret->testMode = 0;
ret->literalCompressionMode = ZSTD_lcm_auto;
ret->excludeCompressedFiles = 0;
return ret;
}
void FIO_freePreferences(FIO_prefs_t* const prefs)
{
free(prefs);
}
/*-*************************************
* Parameters: Display Options
***************************************/
void FIO_setNotificationLevel(int level) { g_display_prefs.displayLevel=level; }
void FIO_setNoProgress(unsigned noProgress) { g_display_prefs.noProgress = noProgress; }
/*-*************************************
* Parameters: Setters
***************************************/
void FIO_setCompressionType(FIO_prefs_t* const prefs, FIO_compressionType_t compressionType) { prefs->compressionType = compressionType; }
void FIO_overwriteMode(FIO_prefs_t* const prefs) { prefs->overwrite = 1; }
void FIO_setSparseWrite(FIO_prefs_t* const prefs, unsigned sparse) { prefs->sparseFileSupport = sparse; }
void FIO_setDictIDFlag(FIO_prefs_t* const prefs, int dictIDFlag) { prefs->dictIDFlag = dictIDFlag; }
void FIO_setChecksumFlag(FIO_prefs_t* const prefs, int checksumFlag) { prefs->checksumFlag = checksumFlag; }
void FIO_setRemoveSrcFile(FIO_prefs_t* const prefs, unsigned flag) { prefs->removeSrcFile = (flag>0); }
void FIO_setMemLimit(FIO_prefs_t* const prefs, unsigned memLimit) { prefs->memLimit = memLimit; }
void FIO_setNbWorkers(FIO_prefs_t* const prefs, int nbWorkers) {
#ifndef ZSTD_MULTITHREAD
if (nbWorkers > 0) DISPLAYLEVEL(2, "Note : multi-threading is disabled \n");
#endif
prefs->nbWorkers = nbWorkers;
}
void FIO_setExcludeCompressedFile(FIO_prefs_t* const prefs, int excludeCompressedFiles) { prefs->excludeCompressedFiles = excludeCompressedFiles; }
void FIO_setBlockSize(FIO_prefs_t* const prefs, int blockSize) {
if (blockSize && prefs->nbWorkers==0)
DISPLAYLEVEL(2, "Setting block size is useless in single-thread mode \n");
prefs->blockSize = blockSize;
}
void FIO_setOverlapLog(FIO_prefs_t* const prefs, int overlapLog){
if (overlapLog && prefs->nbWorkers==0)
DISPLAYLEVEL(2, "Setting overlapLog is useless in single-thread mode \n");
prefs->overlapLog = overlapLog;
}
void FIO_setAdaptiveMode(FIO_prefs_t* const prefs, unsigned adapt) {
if ((adapt>0) && (prefs->nbWorkers==0))
EXM_THROW(1, "Adaptive mode is not compatible with single thread mode \n");
prefs->adaptiveMode = adapt;
}
void FIO_setRsyncable(FIO_prefs_t* const prefs, int rsyncable) {
if ((rsyncable>0) && (prefs->nbWorkers==0))
EXM_THROW(1, "Rsyncable mode is not compatible with single thread mode \n");
prefs->rsyncable = rsyncable;
}
void FIO_setStreamSrcSize(FIO_prefs_t* const prefs, size_t streamSrcSize) {
prefs->streamSrcSize = streamSrcSize;
}
void FIO_setTargetCBlockSize(FIO_prefs_t* const prefs, size_t targetCBlockSize) {
prefs->targetCBlockSize = targetCBlockSize;
}
void FIO_setSrcSizeHint(FIO_prefs_t* const prefs, size_t srcSizeHint) {
prefs->srcSizeHint = (int)MIN((size_t)INT_MAX, srcSizeHint);
}
void FIO_setTestMode(FIO_prefs_t* const prefs, int testMode) {
prefs->testMode = (testMode!=0);
}
void FIO_setLiteralCompressionMode(
FIO_prefs_t* const prefs,
ZSTD_literalCompressionMode_e mode) {
prefs->literalCompressionMode = mode;
}
void FIO_setAdaptMin(FIO_prefs_t* const prefs, int minCLevel)
{
#ifndef ZSTD_NOCOMPRESS
assert(minCLevel >= ZSTD_minCLevel());
#endif
prefs->minAdaptLevel = minCLevel;
}
void FIO_setAdaptMax(FIO_prefs_t* const prefs, int maxCLevel)
{
prefs->maxAdaptLevel = maxCLevel;
}
void FIO_setLdmFlag(FIO_prefs_t* const prefs, unsigned ldmFlag) {
prefs->ldmFlag = (ldmFlag>0);
}
void FIO_setLdmHashLog(FIO_prefs_t* const prefs, int ldmHashLog) {
prefs->ldmHashLog = ldmHashLog;
}
void FIO_setLdmMinMatch(FIO_prefs_t* const prefs, int ldmMinMatch) {
prefs->ldmMinMatch = ldmMinMatch;
}
void FIO_setLdmBucketSizeLog(FIO_prefs_t* const prefs, int ldmBucketSizeLog) {
prefs->ldmBucketSizeLog = ldmBucketSizeLog;
}
void FIO_setLdmHashRateLog(FIO_prefs_t* const prefs, int ldmHashRateLog) {
prefs->ldmHashRateLog = ldmHashRateLog;
}
void FIO_setPatchFromMode(FIO_prefs_t* const prefs, int value)
{
prefs->patchFromMode = value != 0;
}
void FIO_setContentSize(FIO_prefs_t* const prefs, int value)
{
prefs->contentSize = value != 0;
}
/*-*************************************
* Functions
***************************************/
/** FIO_remove() :
* @result : Unlink `fileName`, even if it's read-only */
static int FIO_remove(const char* path)
{
if (!UTIL_isRegularFile(path)) {
DISPLAYLEVEL(2, "zstd: Refusing to remove non-regular file %s \n", path);
return 0;
}
#if defined(_WIN32) || defined(WIN32)
/* windows doesn't allow remove read-only files,
* so try to make it writable first */
UTIL_chmod(path, _S_IWRITE);
#endif
return remove(path);
}
/** FIO_openSrcFile() :
* condition : `srcFileName` must be non-NULL.
* @result : FILE* to `srcFileName`, or NULL if it fails */
static FILE* FIO_openSrcFile(const char* srcFileName)
{
assert(srcFileName != NULL);
if (!strcmp (srcFileName, stdinmark)) {
DISPLAYLEVEL(4,"Using stdin for input \n");
SET_BINARY_MODE(stdin);
return stdin;
}
if (!UTIL_fileExist(srcFileName)) {
DISPLAYLEVEL(1, "zstd: can't stat %s : %s -- ignored \n",
srcFileName, strerror(errno));
return NULL;
}
if (!UTIL_isRegularFile(srcFileName)
&& !UTIL_isFIFO(srcFileName)
) {
DISPLAYLEVEL(1, "zstd: %s is not a regular file -- ignored \n",
srcFileName);
return NULL;
}
{ FILE* const f = fopen(srcFileName, "rb");
if (f == NULL)
DISPLAYLEVEL(1, "zstd: %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*
FIO_openDstFile(FIO_prefs_t* const prefs,
const char* srcFileName, const char* dstFileName)
{
if (prefs->testMode) return NULL; /* do not open file in test mode */
assert(dstFileName != NULL);
if (!strcmp (dstFileName, stdoutmark)) {
DISPLAYLEVEL(4,"Using stdout for output \n");
SET_BINARY_MODE(stdout);
if (prefs->sparseFileSupport == 1) {
prefs->sparseFileSupport = 0;
DISPLAYLEVEL(4, "Sparse File Support is automatically disabled on stdout ; try --sparse \n");
}
return stdout;
}
/* ensure dst is not the same as src */
if (srcFileName != NULL && UTIL_isSameFile(srcFileName, dstFileName)) {
DISPLAYLEVEL(1, "zstd: Refusing to open an output file which will overwrite the input file \n");
return NULL;
}
if (prefs->sparseFileSupport == 1) {
prefs->sparseFileSupport = ZSTD_SPARSE_DEFAULT;
}
if (UTIL_isRegularFile(dstFileName)) {
/* Check if destination file already exists */
FILE* const fCheck = fopen( dstFileName, "rb" );
#if !defined(_WIN32)
/* this test does not work on Windows :
* `NUL` and `nul` are detected as regular files */
if (!strcmp(dstFileName, nulmark)) {
EXM_THROW(40, "%s is unexpectedly categorized as a regular file",
dstFileName);
}
#endif
if (fCheck != NULL) { /* dst file exists, authorization prompt */
fclose(fCheck);
if (!prefs->overwrite) {
if (g_display_prefs.displayLevel <= 1) {
/* No interaction possible */
DISPLAY("zstd: %s already exists; not overwritten \n",
dstFileName);
return NULL;
}
DISPLAY("zstd: %s already exists; overwrite (y/N) ? ",
dstFileName);
{ int ch = getchar();
if ((ch!='Y') && (ch!='y')) {
DISPLAY(" not overwritten \n");
return NULL;
}
/* flush rest of input line */
while ((ch!=EOF) && (ch!='\n')) ch = getchar();
} }
/* need to unlink */
FIO_remove(dstFileName);
} }
{ FILE* const f = fopen( dstFileName, "wb" );
if (f == NULL) {
DISPLAYLEVEL(1, "zstd: %s: %s\n", dstFileName, strerror(errno));
} else if (srcFileName != NULL
&& strcmp (srcFileName, stdinmark)
&& strcmp(dstFileName, nulmark) ) {
/* reduce rights on newly created dst file while compression is ongoing */
UTIL_chmod(dstFileName, 00600);
}
return f;
}
}
/*! FIO_createDictBuffer() :
* creates a buffer, pointed by `*bufferPtr`,
* loads `filename` content into it, up to DICTSIZE_MAX bytes.
* @return : loaded size
* if fileName==NULL, returns 0 and a NULL pointer
*/
static size_t FIO_createDictBuffer(void** bufferPtr, const char* fileName, FIO_prefs_t* const prefs)
{
FILE* fileHandle;
U64 fileSize;
assert(bufferPtr != NULL);
*bufferPtr = NULL;
if (fileName == NULL) return 0;
DISPLAYLEVEL(4,"Loading %s as dictionary \n", fileName);
fileHandle = fopen(fileName, "rb");
if (fileHandle==NULL) EXM_THROW(31, "%s: %s", fileName, strerror(errno));
fileSize = UTIL_getFileSize(fileName);
{
size_t const dictSizeMax = prefs->patchFromMode ? prefs->memLimit : DICTSIZE_MAX;
if (fileSize > dictSizeMax) {
EXM_THROW(32, "Dictionary file %s is too large (> %u bytes)",
fileName, (unsigned)dictSizeMax); /* avoid extreme cases */
}
}
*bufferPtr = malloc((size_t)fileSize);
if (*bufferPtr==NULL) EXM_THROW(34, "%s", strerror(errno));
{ size_t const readSize = fread(*bufferPtr, 1, (size_t)fileSize, fileHandle);
if (readSize != fileSize)
EXM_THROW(35, "Error reading dictionary file %s : %s",
fileName, strerror(errno));
}
fclose(fileHandle);
return (size_t)fileSize;
}
/* FIO_checkFilenameCollisions() :
* Checks for and warns if there are any files that would have the same output path
*/
int FIO_checkFilenameCollisions(const char** filenameTable, unsigned nbFiles) {
const char **filenameTableSorted, *c, *prevElem, *filename;
unsigned u;
#if defined(_MSC_VER) || defined(__MINGW32__) || defined (__MSVCRT__) /* windows support */
c = "\\";
#else
c = "/";
#endif
filenameTableSorted = (const char**) malloc(sizeof(char*) * nbFiles);
if (!filenameTableSorted) {
DISPLAY("Unable to malloc new str array, not checking for name collisions\n");
return 1;
}
for (u = 0; u < nbFiles; ++u) {
filename = strrchr(filenameTable[u], c[0]);
if (filename == NULL) {
filenameTableSorted[u] = filenameTable[u];
} else {
filenameTableSorted[u] = filename+1;
}
}
qsort((void*)filenameTableSorted, nbFiles, sizeof(char*), UTIL_compareStr);
prevElem = filenameTableSorted[0];
for (u = 1; u < nbFiles; ++u) {
if (strcmp(prevElem, filenameTableSorted[u]) == 0) {
DISPLAY("WARNING: Two files have same filename: %s\n", prevElem);
}
prevElem = filenameTableSorted[u];
}
free((void*)filenameTableSorted);
return 0;
}
static const char*
extractFilename(const char* path, char separator)
{
const char* search = strrchr(path, separator);
if (search == NULL) return path;
return search+1;
}
/* FIO_createFilename_fromOutDir() :
* Takes a source file name and specified output directory, and
* allocates memory for and returns a pointer to final path.
* This function never returns an error (it may abort() in case of pb)
*/
static char*
FIO_createFilename_fromOutDir(const char* path, const char* outDirName, const size_t suffixLen)
{
const char* filenameStart;
char separator;
char* result;
#if defined(_MSC_VER) || defined(__MINGW32__) || defined (__MSVCRT__) /* windows support */
separator = '\\';
#else
separator = '/';
#endif
filenameStart = extractFilename(path, separator);
#if defined(_MSC_VER) || defined(__MINGW32__) || defined (__MSVCRT__) /* windows support */
filenameStart = extractFilename(filenameStart, '/'); /* sometimes, '/' separator is also used on Windows (mingw+msys2) */
#endif
result = (char*) calloc(1, strlen(outDirName) + 1 + strlen(filenameStart) + suffixLen + 1);
if (!result) {
EXM_THROW(30, "zstd: FIO_createFilename_fromOutDir: %s", strerror(errno));
}
memcpy(result, outDirName, strlen(outDirName));
if (outDirName[strlen(outDirName)-1] == separator) {
memcpy(result + strlen(outDirName), filenameStart, strlen(filenameStart));
} else {
memcpy(result + strlen(outDirName), &separator, 1);
memcpy(result + strlen(outDirName) + 1, filenameStart, strlen(filenameStart));
}
return result;
}
/* FIO_highbit64() :
* gives position of highest bit.
* note : only works for v > 0 !
*/
static unsigned FIO_highbit64(unsigned long long v)
{
unsigned count = 0;
assert(v != 0);
v >>= 1;
while (v) { v >>= 1; count++; }
return count;
}
static void FIO_adjustMemLimitForPatchFromMode(FIO_prefs_t* const prefs,
unsigned long long const dictSize,
unsigned long long const maxSrcFileSize)
{
unsigned long long maxSize = MAX(prefs->memLimit, MAX(dictSize, maxSrcFileSize));
assert(maxSize != UTIL_FILESIZE_UNKNOWN);
if (maxSize > UINT_MAX)
EXM_THROW(42, "Can't handle files larger than %u GB\n", UINT_MAX/(1 GB) + 1);
FIO_setMemLimit(prefs, (unsigned)maxSize);
}
#ifndef ZSTD_NOCOMPRESS
/* **********************************************************************
* Compression
************************************************************************/
typedef struct {
FILE* srcFile;
FILE* dstFile;
void* srcBuffer;
size_t srcBufferSize;
void* dstBuffer;
size_t dstBufferSize;
void* dictBuffer;
size_t dictBufferSize;
const char* dictFileName;
ZSTD_CStream* cctx;
} cRess_t;
static void FIO_adjustParamsForPatchFromMode(FIO_prefs_t* const prefs,
ZSTD_compressionParameters* comprParams,
unsigned long long const dictSize,
unsigned long long const maxSrcFileSize,
int cLevel)
{
unsigned const fileWindowLog = FIO_highbit64(maxSrcFileSize) + 1;
ZSTD_compressionParameters const cParams = ZSTD_getCParams(cLevel, (size_t)maxSrcFileSize, (size_t)dictSize);
FIO_adjustMemLimitForPatchFromMode(prefs, dictSize, maxSrcFileSize);
if (fileWindowLog > ZSTD_WINDOWLOG_MAX)
DISPLAYLEVEL(1, "Max window log exceeded by file (compression ratio will suffer)\n");
comprParams->windowLog = MIN(ZSTD_WINDOWLOG_MAX, fileWindowLog);
if (fileWindowLog > ZSTD_cycleLog(cParams.hashLog, cParams.strategy)) {
if (!prefs->ldmFlag)
DISPLAYLEVEL(1, "long mode automaticaly triggered\n");
FIO_setLdmFlag(prefs, 1);
}
if (cParams.strategy >= ZSTD_btopt) {
DISPLAYLEVEL(1, "[Optimal parser notes] Consider the following to improve patch size at the cost of speed:\n");
DISPLAYLEVEL(1, "- Use --single-thread mode in the zstd cli\n");
DISPLAYLEVEL(1, "- Set a larger targetLength (eg. --zstd=targetLength=4096)\n");
DISPLAYLEVEL(1, "- Set a larger chainLog (eg. --zstd=chainLog=%u)\n", ZSTD_CHAINLOG_MAX);
DISPLAYLEVEL(1, "Also consdier playing around with searchLog and hashLog\n");
}
}
static cRess_t FIO_createCResources(FIO_prefs_t* const prefs,
const char* dictFileName, unsigned long long const maxSrcFileSize,
int cLevel, ZSTD_compressionParameters comprParams) {
cRess_t ress;
memset(&ress, 0, sizeof(ress));
DISPLAYLEVEL(6, "FIO_createCResources \n");
ress.cctx = ZSTD_createCCtx();
if (ress.cctx == NULL)
EXM_THROW(30, "allocation error (%s): can't create ZSTD_CCtx",
strerror(errno));
ress.srcBufferSize = ZSTD_CStreamInSize();
ress.srcBuffer = malloc(ress.srcBufferSize);
ress.dstBufferSize = ZSTD_CStreamOutSize();
/* need to update memLimit before calling createDictBuffer
* because of memLimit check inside it */
if (prefs->patchFromMode)
FIO_adjustParamsForPatchFromMode(prefs, &comprParams, UTIL_getFileSize(dictFileName), maxSrcFileSize, cLevel);
ress.dstBuffer = malloc(ress.dstBufferSize);
ress.dictBufferSize = FIO_createDictBuffer(&ress.dictBuffer, dictFileName, prefs); /* works with dictFileName==NULL */
if (!ress.srcBuffer || !ress.dstBuffer)
EXM_THROW(31, "allocation error : not enough memory");
/* Advanced parameters, including dictionary */
if (dictFileName && (ress.dictBuffer==NULL))
EXM_THROW(32, "allocation error : can't create dictBuffer");
ress.dictFileName = dictFileName;
if (prefs->adaptiveMode && !prefs->ldmFlag && !comprParams.windowLog)
comprParams.windowLog = ADAPT_WINDOWLOG_DEFAULT;
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_contentSizeFlag, prefs->contentSize) ); /* always enable content size when available (note: supposed to be default) */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_dictIDFlag, prefs->dictIDFlag) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_checksumFlag, prefs->checksumFlag) );
/* compression level */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_compressionLevel, cLevel) );
/* max compressed block size */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_targetCBlockSize, (int)prefs->targetCBlockSize) );
/* source size hint */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_srcSizeHint, (int)prefs->srcSizeHint) );
/* long distance matching */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_enableLongDistanceMatching, prefs->ldmFlag) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmHashLog, prefs->ldmHashLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmMinMatch, prefs->ldmMinMatch) );
if (prefs->ldmBucketSizeLog != FIO_LDM_PARAM_NOTSET) {
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmBucketSizeLog, prefs->ldmBucketSizeLog) );
}
if (prefs->ldmHashRateLog != FIO_LDM_PARAM_NOTSET) {
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_ldmHashRateLog, prefs->ldmHashRateLog) );
}
/* compression parameters */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_windowLog, (int)comprParams.windowLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_chainLog, (int)comprParams.chainLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_hashLog, (int)comprParams.hashLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_searchLog, (int)comprParams.searchLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_minMatch, (int)comprParams.minMatch) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_targetLength, (int)comprParams.targetLength) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_strategy, comprParams.strategy) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_literalCompressionMode, (int)prefs->literalCompressionMode) );
/* multi-threading */
#ifdef ZSTD_MULTITHREAD
DISPLAYLEVEL(5,"set nb workers = %u \n", prefs->nbWorkers);
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_nbWorkers, prefs->nbWorkers) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_jobSize, prefs->blockSize) );
if (prefs->overlapLog != FIO_OVERLAP_LOG_NOTSET) {
DISPLAYLEVEL(3,"set overlapLog = %u \n", prefs->overlapLog);
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_overlapLog, prefs->overlapLog) );
}
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_rsyncable, prefs->rsyncable) );
#endif
/* dictionary */
if (prefs->patchFromMode) {
CHECK( ZSTD_CCtx_refPrefix(ress.cctx, ress.dictBuffer, ress.dictBufferSize) );
} else {
CHECK( ZSTD_CCtx_loadDictionary(ress.cctx, ress.dictBuffer, ress.dictBufferSize) );
}
return ress;
}
static void FIO_freeCResources(cRess_t ress)
{
free(ress.srcBuffer);
free(ress.dstBuffer);
free(ress.dictBuffer);
ZSTD_freeCStream(ress.cctx); /* never fails */
}
#ifdef ZSTD_GZCOMPRESS
static unsigned long long
FIO_compressGzFrame(const cRess_t* ress, /* buffers & handlers are used, but not changed */
const char* srcFileName, U64 const srcFileSize,
int compressionLevel, U64* readsize)
{
unsigned long long inFileSize = 0, outFileSize = 0;
z_stream strm;
if (compressionLevel > Z_BEST_COMPRESSION)
compressionLevel = Z_BEST_COMPRESSION;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
{ int const ret = deflateInit2(&strm, compressionLevel, Z_DEFLATED,
15 /* maxWindowLogSize */ + 16 /* gzip only */,
8, Z_DEFAULT_STRATEGY); /* see http://www.zlib.net/manual.html */
if (ret != Z_OK) {
EXM_THROW(71, "zstd: %s: deflateInit2 error %d \n", srcFileName, ret);
} }
strm.next_in = 0;
strm.avail_in = 0;
strm.next_out = (Bytef*)ress->dstBuffer;
strm.avail_out = (uInt)ress->dstBufferSize;
while (1) {
int ret;
if (strm.avail_in == 0) {
size_t const inSize = fread(ress->srcBuffer, 1, ress->srcBufferSize, ress->srcFile);
if (inSize == 0) break;
inFileSize += inSize;
strm.next_in = (z_const unsigned char*)ress->srcBuffer;
strm.avail_in = (uInt)inSize;
}
ret = deflate(&strm, Z_NO_FLUSH);
if (ret != Z_OK)
EXM_THROW(72, "zstd: %s: deflate error %d \n", srcFileName, ret);
{ size_t const cSize = ress->dstBufferSize - strm.avail_out;
if (cSize) {
if (fwrite(ress->dstBuffer, 1, cSize, ress->dstFile) != cSize)
EXM_THROW(73, "Write error : cannot write to output file : %s ", strerror(errno));
outFileSize += cSize;
strm.next_out = (Bytef*)ress->dstBuffer;
strm.avail_out = (uInt)ress->dstBufferSize;
} }
if (srcFileSize == UTIL_FILESIZE_UNKNOWN) {
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%% ",
(unsigned)(inFileSize>>20),
(double)outFileSize/inFileSize*100)
} else {
DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%% ",
(unsigned)(inFileSize>>20), (unsigned)(srcFileSize>>20),
(double)outFileSize/inFileSize*100);
} }
while (1) {
int const ret = deflate(&strm, Z_FINISH);
{ size_t const cSize = ress->dstBufferSize - strm.avail_out;
if (cSize) {
if (fwrite(ress->dstBuffer, 1, cSize, ress->dstFile) != cSize)
EXM_THROW(75, "Write error : %s ", strerror(errno));
outFileSize += cSize;
strm.next_out = (Bytef*)ress->dstBuffer;
strm.avail_out = (uInt)ress->dstBufferSize;
} }
if (ret == Z_STREAM_END) break;
if (ret != Z_BUF_ERROR)
EXM_THROW(77, "zstd: %s: deflate error %d \n", srcFileName, ret);
}
{ int const ret = deflateEnd(&strm);
if (ret != Z_OK) {
EXM_THROW(79, "zstd: %s: deflateEnd error %d \n", srcFileName, ret);
} }
*readsize = inFileSize;
return outFileSize;
}
#endif
#ifdef ZSTD_LZMACOMPRESS
static unsigned long long
FIO_compressLzmaFrame(cRess_t* ress,
const char* srcFileName, U64 const srcFileSize,
int compressionLevel, U64* readsize, int plain_lzma)
{
unsigned long long inFileSize = 0, outFileSize = 0;
lzma_stream strm = LZMA_STREAM_INIT;
lzma_action action = LZMA_RUN;
lzma_ret ret;
if (compressionLevel < 0) compressionLevel = 0;
if (compressionLevel > 9) compressionLevel = 9;
if (plain_lzma) {
lzma_options_lzma opt_lzma;
if (lzma_lzma_preset(&opt_lzma, compressionLevel))
EXM_THROW(81, "zstd: %s: lzma_lzma_preset error", srcFileName);
ret = lzma_alone_encoder(&strm, &opt_lzma); /* LZMA */
if (ret != LZMA_OK)
EXM_THROW(82, "zstd: %s: lzma_alone_encoder error %d", srcFileName, ret);
} else {
ret = lzma_easy_encoder(&strm, compressionLevel, LZMA_CHECK_CRC64); /* XZ */
if (ret != LZMA_OK)
EXM_THROW(83, "zstd: %s: lzma_easy_encoder error %d", srcFileName, ret);
}
strm.next_in = 0;
strm.avail_in = 0;
strm.next_out = (BYTE*)ress->dstBuffer;
strm.avail_out = ress->dstBufferSize;
while (1) {
if (strm.avail_in == 0) {
size_t const inSize = fread(ress->srcBuffer, 1, ress->srcBufferSize, ress->srcFile);
if (inSize == 0) action = LZMA_FINISH;
inFileSize += inSize;
strm.next_in = (BYTE const*)ress->srcBuffer;
strm.avail_in = inSize;
}
ret = lzma_code(&strm, action);
if (ret != LZMA_OK && ret != LZMA_STREAM_END)
EXM_THROW(84, "zstd: %s: lzma_code encoding error %d", srcFileName, ret);
{ size_t const compBytes = ress->dstBufferSize - strm.avail_out;
if (compBytes) {
if (fwrite(ress->dstBuffer, 1, compBytes, ress->dstFile) != compBytes)
EXM_THROW(85, "Write error : %s", strerror(errno));
outFileSize += compBytes;
strm.next_out = (BYTE*)ress->dstBuffer;
strm.avail_out = ress->dstBufferSize;
} }
if (srcFileSize == UTIL_FILESIZE_UNKNOWN)
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%",
(unsigned)(inFileSize>>20),
(double)outFileSize/inFileSize*100)
else
DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%",
(unsigned)(inFileSize>>20), (unsigned)(srcFileSize>>20),
(double)outFileSize/inFileSize*100);
if (ret == LZMA_STREAM_END) break;
}
lzma_end(&strm);
*readsize = inFileSize;
return outFileSize;
}
#endif
#ifdef ZSTD_LZ4COMPRESS
#if LZ4_VERSION_NUMBER <= 10600
#define LZ4F_blockLinked blockLinked
#define LZ4F_max64KB max64KB
#endif
static int FIO_LZ4_GetBlockSize_FromBlockId (int id) { return (1 << (8 + (2 * id))); }
static unsigned long long
FIO_compressLz4Frame(cRess_t* ress,
const char* srcFileName, U64 const srcFileSize,
int compressionLevel, int checksumFlag,
U64* readsize)
{
const size_t blockSize = FIO_LZ4_GetBlockSize_FromBlockId(LZ4F_max64KB);
unsigned long long inFileSize = 0, outFileSize = 0;
LZ4F_preferences_t prefs;
LZ4F_compressionContext_t ctx;
LZ4F_errorCode_t const errorCode = LZ4F_createCompressionContext(&ctx, LZ4F_VERSION);
if (LZ4F_isError(errorCode))
EXM_THROW(31, "zstd: failed to create lz4 compression context");
memset(&prefs, 0, sizeof(prefs));
assert(blockSize <= ress->srcBufferSize);
prefs.autoFlush = 1;
prefs.compressionLevel = compressionLevel;
prefs.frameInfo.blockMode = LZ4F_blockLinked;
prefs.frameInfo.blockSizeID = LZ4F_max64KB;
prefs.frameInfo.contentChecksumFlag = (contentChecksum_t)checksumFlag;
#if LZ4_VERSION_NUMBER >= 10600
prefs.frameInfo.contentSize = (srcFileSize==UTIL_FILESIZE_UNKNOWN) ? 0 : srcFileSize;
#endif
assert(LZ4F_compressBound(blockSize, &prefs) <= ress->dstBufferSize);
{
size_t readSize;
size_t headerSize = LZ4F_compressBegin(ctx, ress->dstBuffer, ress->dstBufferSize, &prefs);
if (LZ4F_isError(headerSize))
EXM_THROW(33, "File header generation failed : %s",
LZ4F_getErrorName(headerSize));
if (fwrite(ress->dstBuffer, 1, headerSize, ress->dstFile) != headerSize)
EXM_THROW(34, "Write error : %s (cannot write header)", strerror(errno));
outFileSize += headerSize;
/* Read first block */
readSize = fread(ress->srcBuffer, (size_t)1, (size_t)blockSize, ress->srcFile);
inFileSize += readSize;
/* Main Loop */
while (readSize>0) {
size_t const outSize = LZ4F_compressUpdate(ctx,
ress->dstBuffer, ress->dstBufferSize,
ress->srcBuffer, readSize, NULL);
if (LZ4F_isError(outSize))
EXM_THROW(35, "zstd: %s: lz4 compression failed : %s",
srcFileName, LZ4F_getErrorName(outSize));
outFileSize += outSize;
if (srcFileSize == UTIL_FILESIZE_UNKNOWN) {
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%",
(unsigned)(inFileSize>>20),
(double)outFileSize/inFileSize*100)
} else {
DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%",
(unsigned)(inFileSize>>20), (unsigned)(srcFileSize>>20),
(double)outFileSize/inFileSize*100);
}
/* Write Block */
{ size_t const sizeCheck = fwrite(ress->dstBuffer, 1, outSize, ress->dstFile);
if (sizeCheck != outSize)
EXM_THROW(36, "Write error : %s", strerror(errno));
}
/* Read next block */
readSize = fread(ress->srcBuffer, (size_t)1, (size_t)blockSize, ress->srcFile);
inFileSize += readSize;
}
if (ferror(ress->srcFile)) EXM_THROW(37, "Error reading %s ", srcFileName);
/* End of Stream mark */
headerSize = LZ4F_compressEnd(ctx, ress->dstBuffer, ress->dstBufferSize, NULL);
if (LZ4F_isError(headerSize))
EXM_THROW(38, "zstd: %s: lz4 end of file generation failed : %s",
srcFileName, LZ4F_getErrorName(headerSize));
{ size_t const sizeCheck = fwrite(ress->dstBuffer, 1, headerSize, ress->dstFile);
if (sizeCheck != headerSize)
EXM_THROW(39, "Write error : %s (cannot write end of stream)",
strerror(errno));
}
outFileSize += headerSize;
}
*readsize = inFileSize;
LZ4F_freeCompressionContext(ctx);
return outFileSize;
}
#endif
static unsigned long long
FIO_compressZstdFrame(FIO_prefs_t* const prefs,
const cRess_t* ressPtr,
const char* srcFileName, U64 fileSize,
int compressionLevel, U64* readsize)
{
cRess_t const ress = *ressPtr;
FILE* const srcFile = ress.srcFile;
FILE* const dstFile = ress.dstFile;
U64 compressedfilesize = 0;
ZSTD_EndDirective directive = ZSTD_e_continue;
/* stats */
ZSTD_frameProgression previous_zfp_update = { 0, 0, 0, 0, 0, 0 };
ZSTD_frameProgression previous_zfp_correction = { 0, 0, 0, 0, 0, 0 };
typedef enum { noChange, slower, faster } speedChange_e;
speedChange_e speedChange = noChange;
unsigned flushWaiting = 0;
unsigned inputPresented = 0;
unsigned inputBlocked = 0;
unsigned lastJobID = 0;
DISPLAYLEVEL(6, "compression using zstd format \n");
/* init */
if (fileSize != UTIL_FILESIZE_UNKNOWN) {
CHECK(ZSTD_CCtx_setPledgedSrcSize(ress.cctx, fileSize));
} else if (prefs->streamSrcSize > 0) {
/* unknown source size; use the declared stream size */
CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, prefs->streamSrcSize) );
}
(void)srcFileName;
/* Main compression loop */
do {
size_t stillToFlush;
/* Fill input Buffer */
size_t const inSize = fread(ress.srcBuffer, (size_t)1, ress.srcBufferSize, srcFile);
ZSTD_inBuffer inBuff = { ress.srcBuffer, inSize, 0 };
DISPLAYLEVEL(6, "fread %u bytes from source \n", (unsigned)inSize);
*readsize += inSize;
if ((inSize == 0) || (*readsize == fileSize))
directive = ZSTD_e_end;
stillToFlush = 1;
while ((inBuff.pos != inBuff.size) /* input buffer must be entirely ingested */
|| (directive == ZSTD_e_end && stillToFlush != 0) ) {
size_t const oldIPos = inBuff.pos;
ZSTD_outBuffer outBuff = { ress.dstBuffer, ress.dstBufferSize, 0 };
size_t const toFlushNow = ZSTD_toFlushNow(ress.cctx);
CHECK_V(stillToFlush, ZSTD_compressStream2(ress.cctx, &outBuff, &inBuff, directive));
/* count stats */
inputPresented++;
if (oldIPos == inBuff.pos) inputBlocked++; /* input buffer is full and can't take any more : input speed is faster than consumption rate */
if (!toFlushNow) flushWaiting = 1;
/* Write compressed stream */
DISPLAYLEVEL(6, "ZSTD_compress_generic(end:%u) => input pos(%u)<=(%u)size ; output generated %u bytes \n",
(unsigned)directive, (unsigned)inBuff.pos, (unsigned)inBuff.size, (unsigned)outBuff.pos);
if (outBuff.pos) {
size_t const sizeCheck = fwrite(ress.dstBuffer, 1, outBuff.pos, dstFile);
if (sizeCheck != outBuff.pos)
EXM_THROW(25, "Write error : %s (cannot write compressed block)",
strerror(errno));
compressedfilesize += outBuff.pos;
}
/* display notification; and adapt compression level */
if (READY_FOR_UPDATE()) {
ZSTD_frameProgression const zfp = ZSTD_getFrameProgression(ress.cctx);
double const cShare = (double)zfp.produced / (zfp.consumed + !zfp.consumed/*avoid div0*/) * 100;
/* display progress notifications */
if (g_display_prefs.displayLevel >= 3) {
DISPLAYUPDATE(3, "\r(L%i) Buffered :%4u MB - Consumed :%4u MB - Compressed :%4u MB => %.2f%% ",
compressionLevel,
(unsigned)((zfp.ingested - zfp.consumed) >> 20),
(unsigned)(zfp.consumed >> 20),
(unsigned)(zfp.produced >> 20),
cShare );
} else { /* summarized notifications if == 2; */
DISPLAYLEVEL(2, "\rRead : %u ", (unsigned)(zfp.consumed >> 20));
if (fileSize != UTIL_FILESIZE_UNKNOWN)
DISPLAYLEVEL(2, "/ %u ", (unsigned)(fileSize >> 20));
DISPLAYLEVEL(2, "MB ==> %2.f%% ", cShare);
DELAY_NEXT_UPDATE();
}
/* adaptive mode : statistics measurement and speed correction */
if (prefs->adaptiveMode) {
/* check output speed */
if (zfp.currentJobID > 1) { /* only possible if nbWorkers >= 1 */
unsigned long long newlyProduced = zfp.produced - previous_zfp_update.produced;
unsigned long long newlyFlushed = zfp.flushed - previous_zfp_update.flushed;
assert(zfp.produced >= previous_zfp_update.produced);
assert(prefs->nbWorkers >= 1);
/* test if compression is blocked
* either because output is slow and all buffers are full
* or because input is slow and no job can start while waiting for at least one buffer to be filled.
* note : exclude starting part, since currentJobID > 1 */
if ( (zfp.consumed == previous_zfp_update.consumed) /* no data compressed : no data available, or no more buffer to compress to, OR compression is really slow (compression of a single block is slower than update rate)*/
&& (zfp.nbActiveWorkers == 0) /* confirmed : no compression ongoing */
) {
DISPLAYLEVEL(6, "all buffers full : compression stopped => slow down \n")
speedChange = slower;
}
previous_zfp_update = zfp;
if ( (newlyProduced > (newlyFlushed * 9 / 8)) /* compression produces more data than output can flush (though production can be spiky, due to work unit : (N==4)*block sizes) */
&& (flushWaiting == 0) /* flush speed was never slowed by lack of production, so it's operating at max capacity */
) {
DISPLAYLEVEL(6, "compression faster than flush (%llu > %llu), and flushed was never slowed down by lack of production => slow down \n", newlyProduced, newlyFlushed);
speedChange = slower;
}
flushWaiting = 0;
}
/* course correct only if there is at least one new job completed */
if (zfp.currentJobID > lastJobID) {
DISPLAYLEVEL(6, "compression level adaptation check \n")
/* check input speed */
if (zfp.currentJobID > (unsigned)(prefs->nbWorkers+1)) { /* warm up period, to fill all workers */
if (inputBlocked <= 0) {
DISPLAYLEVEL(6, "input is never blocked => input is slower than ingestion \n");
speedChange = slower;
} else if (speedChange == noChange) {
unsigned long long newlyIngested = zfp.ingested - previous_zfp_correction.ingested;
unsigned long long newlyConsumed = zfp.consumed - previous_zfp_correction.consumed;
unsigned long long newlyProduced = zfp.produced - previous_zfp_correction.produced;
unsigned long long newlyFlushed = zfp.flushed - previous_zfp_correction.flushed;
previous_zfp_correction = zfp;
assert(inputPresented > 0);
DISPLAYLEVEL(6, "input blocked %u/%u(%.2f) - ingested:%u vs %u:consumed - flushed:%u vs %u:produced \n",
inputBlocked, inputPresented, (double)inputBlocked/inputPresented*100,
(unsigned)newlyIngested, (unsigned)newlyConsumed,
(unsigned)newlyFlushed, (unsigned)newlyProduced);
if ( (inputBlocked > inputPresented / 8) /* input is waiting often, because input buffers is full : compression or output too slow */
&& (newlyFlushed * 33 / 32 > newlyProduced) /* flush everything that is produced */
&& (newlyIngested * 33 / 32 > newlyConsumed) /* input speed as fast or faster than compression speed */
) {
DISPLAYLEVEL(6, "recommend faster as in(%llu) >= (%llu)comp(%llu) <= out(%llu) \n",
newlyIngested, newlyConsumed, newlyProduced, newlyFlushed);
speedChange = faster;
}
}
inputBlocked = 0;
inputPresented = 0;
}
if (speedChange == slower) {
DISPLAYLEVEL(6, "slower speed , higher compression \n")
compressionLevel ++;
if (compressionLevel > ZSTD_maxCLevel()) compressionLevel = ZSTD_maxCLevel();
if (compressionLevel > prefs->maxAdaptLevel) compressionLevel = prefs->maxAdaptLevel;
compressionLevel += (compressionLevel == 0); /* skip 0 */
ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_compressionLevel, compressionLevel);
}
if (speedChange == faster) {
DISPLAYLEVEL(6, "faster speed , lighter compression \n")
compressionLevel --;
if (compressionLevel < prefs->minAdaptLevel) compressionLevel = prefs->minAdaptLevel;
compressionLevel -= (compressionLevel == 0); /* skip 0 */
ZSTD_CCtx_setParameter(ress.cctx, ZSTD_c_compressionLevel, compressionLevel);
}
speedChange = noChange;
lastJobID = zfp.currentJobID;
} /* if (zfp.currentJobID > lastJobID) */
} /* if (g_adaptiveMode) */
} /* if (READY_FOR_UPDATE()) */
} /* while ((inBuff.pos != inBuff.size) */
} while (directive != ZSTD_e_end);
if (ferror(srcFile)) {
EXM_THROW(26, "Read error : I/O error");
}
if (fileSize != UTIL_FILESIZE_UNKNOWN && *readsize != fileSize) {
EXM_THROW(27, "Read error : Incomplete read : %llu / %llu B",
(unsigned long long)*readsize, (unsigned long long)fileSize);
}
return compressedfilesize;
}
/*! FIO_compressFilename_internal() :
* same as FIO_compressFilename_extRess(), with `ress.desFile` already opened.
* @return : 0 : compression completed correctly,
* 1 : missing or pb opening srcFileName
*/
static int
FIO_compressFilename_internal(FIO_prefs_t* const prefs,
cRess_t ress,
const char* dstFileName, const char* srcFileName,
int compressionLevel)
{
UTIL_time_t const timeStart = UTIL_getTime();
clock_t const cpuStart = clock();
U64 readsize = 0;
U64 compressedfilesize = 0;
U64 const fileSize = UTIL_getFileSize(srcFileName);
DISPLAYLEVEL(5, "%s: %u bytes \n", srcFileName, (unsigned)fileSize);
/* compression format selection */
switch (prefs->compressionType) {
default:
case FIO_zstdCompression:
compressedfilesize = FIO_compressZstdFrame(prefs, &ress, srcFileName, fileSize, compressionLevel, &readsize);
break;
case FIO_gzipCompression:
#ifdef ZSTD_GZCOMPRESS
compressedfilesize = FIO_compressGzFrame(&ress, srcFileName, fileSize, compressionLevel, &readsize);
#else
(void)compressionLevel;
EXM_THROW(20, "zstd: %s: file cannot be compressed as gzip (zstd compiled without ZSTD_GZCOMPRESS) -- ignored \n",
srcFileName);
#endif
break;
case FIO_xzCompression:
case FIO_lzmaCompression:
#ifdef ZSTD_LZMACOMPRESS
compressedfilesize = FIO_compressLzmaFrame(&ress, srcFileName, fileSize, compressionLevel, &readsize, prefs->compressionType==FIO_lzmaCompression);
#else
(void)compressionLevel;
EXM_THROW(20, "zstd: %s: file cannot be compressed as xz/lzma (zstd compiled without ZSTD_LZMACOMPRESS) -- ignored \n",
srcFileName);
#endif
break;
case FIO_lz4Compression:
#ifdef ZSTD_LZ4COMPRESS
compressedfilesize = FIO_compressLz4Frame(&ress, srcFileName, fileSize, compressionLevel, prefs->checksumFlag, &readsize);
#else
(void)compressionLevel;
EXM_THROW(20, "zstd: %s: file cannot be compressed as lz4 (zstd compiled without ZSTD_LZ4COMPRESS) -- ignored \n",
srcFileName);
#endif
break;
}
/* Status */
DISPLAYLEVEL(2, "\r%79s\r", "");
if (readsize == 0) {
DISPLAYLEVEL(2,"%-20s : (%6llu => %6llu bytes, %s) \n",
srcFileName,
(unsigned long long)readsize, (unsigned long long) compressedfilesize,
dstFileName);
} else {
DISPLAYLEVEL(2,"%-20s :%6.2f%% (%6llu => %6llu bytes, %s) \n",
srcFileName,
(double)compressedfilesize / readsize * 100,
(unsigned long long)readsize, (unsigned long long) compressedfilesize,
dstFileName);
}
/* Elapsed Time and CPU Load */
{ clock_t const cpuEnd = clock();
double const cpuLoad_s = (double)(cpuEnd - cpuStart) / CLOCKS_PER_SEC;
U64 const timeLength_ns = UTIL_clockSpanNano(timeStart);
double const timeLength_s = (double)timeLength_ns / 1000000000;
double const cpuLoad_pct = (cpuLoad_s / timeLength_s) * 100;
DISPLAYLEVEL(4, "%-20s : Completed in %.2f sec (cpu load : %.0f%%)\n",
srcFileName, timeLength_s, cpuLoad_pct);
}
return 0;
}
/*! FIO_compressFilename_dstFile() :
* open dstFileName, or pass-through if ress.dstFile != NULL,
* then start compression with FIO_compressFilename_internal().
* Manages source removal (--rm) and file permissions transfer.
* note : ress.srcFile must be != NULL,
* so reach this function through FIO_compressFilename_srcFile().
* @return : 0 : compression completed correctly,
* 1 : pb
*/
static int FIO_compressFilename_dstFile(FIO_prefs_t* const prefs,
cRess_t ress,
const char* dstFileName,
const char* srcFileName,
int compressionLevel)
{
int closeDstFile = 0;
int result;
stat_t statbuf;
int transfer_permissions = 0;
assert(ress.srcFile != NULL);
if (ress.dstFile == NULL) {
closeDstFile = 1;
DISPLAYLEVEL(6, "FIO_compressFilename_dstFile: opening dst: %s \n", dstFileName);
ress.dstFile = FIO_openDstFile(prefs, srcFileName, dstFileName);
if (ress.dstFile==NULL) return 1; /* could not open dstFileName */
/* Must only be added after FIO_openDstFile() succeeds.
* Otherwise we may delete the destination file if it already exists,
* and the user presses Ctrl-C when asked if they wish to overwrite.
*/
addHandler(dstFileName);
if ( strcmp (srcFileName, stdinmark)
&& UTIL_getFileStat(srcFileName, &statbuf))
transfer_permissions = 1;
}
result = FIO_compressFilename_internal(prefs, ress, dstFileName, srcFileName, compressionLevel);
if (closeDstFile) {
FILE* const dstFile = ress.dstFile;
ress.dstFile = NULL;
clearHandler();
DISPLAYLEVEL(6, "FIO_compressFilename_dstFile: closing dst: %s \n", dstFileName);
if (fclose(dstFile)) { /* error closing dstFile */
DISPLAYLEVEL(1, "zstd: %s: %s \n", dstFileName, strerror(errno));
result=1;
}
if ( (result != 0) /* operation failure */
&& strcmp(dstFileName, nulmark) /* special case : don't remove() /dev/null */
&& strcmp(dstFileName, stdoutmark) /* special case : don't remove() stdout */
) {
FIO_remove(dstFileName); /* remove compression artefact; note don't do anything special if remove() fails */
} else if ( strcmp(dstFileName, stdoutmark)
&& strcmp(dstFileName, nulmark)
&& transfer_permissions) {
DISPLAYLEVEL(6, "FIO_compressFilename_dstFile: transfering permissions into dst: %s \n", dstFileName);
UTIL_setFileStat(dstFileName, &statbuf);
} else {
DISPLAYLEVEL(6, "FIO_compressFilename_dstFile: do not transfer permissions into dst: %s \n", dstFileName);
}
}
return result;
}
/* List used to compare file extensions (used with --exclude-compressed flag)
* Different from the suffixList and should only apply to ZSTD compress operationResult
*/
static const char *compressedFileExtensions[] = {
ZSTD_EXTENSION,
TZSTD_EXTENSION,
GZ_EXTENSION,
TGZ_EXTENSION,
LZMA_EXTENSION,
XZ_EXTENSION,
TXZ_EXTENSION,
LZ4_EXTENSION,
TLZ4_EXTENSION,
NULL
};
/*! FIO_compressFilename_srcFile() :
* @return : 0 : compression completed correctly,
* 1 : missing or pb opening srcFileName
*/
static int
FIO_compressFilename_srcFile(FIO_prefs_t* const prefs,
cRess_t ress,
const char* dstFileName,
const char* srcFileName,
int compressionLevel)
{
int result;
DISPLAYLEVEL(6, "FIO_compressFilename_srcFile: %s \n", srcFileName);
/* ensure src is not a directory */
if (UTIL_isDirectory(srcFileName)) {
DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName);
return 1;
}
/* ensure src is not the same as dict (if present) */
if (ress.dictFileName != NULL && UTIL_isSameFile(srcFileName, ress.dictFileName)) {
DISPLAYLEVEL(1, "zstd: cannot use %s as an input file and dictionary \n", srcFileName);
return 1;
}
/* Check if "srcFile" is compressed. Only done if --exclude-compressed flag is used
* YES => ZSTD will skip compression of the file and will return 0.
* NO => ZSTD will resume with compress operation.
*/
if (prefs->excludeCompressedFiles == 1 && UTIL_isCompressedFile(srcFileName, compressedFileExtensions)) {
DISPLAYLEVEL(4, "File is already compressed : %s \n", srcFileName);
return 0;
}
ress.srcFile = FIO_openSrcFile(srcFileName);
if (ress.srcFile == NULL) return 1; /* srcFile could not be opened */
result = FIO_compressFilename_dstFile(prefs, ress, dstFileName, srcFileName, compressionLevel);
fclose(ress.srcFile);
ress.srcFile = NULL;
if ( prefs->removeSrcFile /* --rm */
&& result == 0 /* success */
&& strcmp(srcFileName, stdinmark) /* exception : don't erase stdin */
) {
/* We must clear the handler, since after this point calling it would
* delete both the source and destination files.
*/
clearHandler();
if (FIO_remove(srcFileName))
EXM_THROW(1, "zstd: %s: %s", srcFileName, strerror(errno));
}
return result;
}
int FIO_compressFilename(FIO_prefs_t* const prefs, const char* dstFileName,
const char* srcFileName, const char* dictFileName,
int compressionLevel, ZSTD_compressionParameters comprParams)
{
cRess_t const ress = FIO_createCResources(prefs, dictFileName, UTIL_getFileSize(srcFileName), compressionLevel, comprParams);
int const result = FIO_compressFilename_srcFile(prefs, ress, dstFileName, srcFileName, compressionLevel);
FIO_freeCResources(ress);
return result;
}
/* FIO_determineCompressedName() :
* create a destination filename for compressed srcFileName.
* @return a pointer to it.
* This function never returns an error (it may abort() in case of pb)
*/
static const char*
FIO_determineCompressedName(const char* srcFileName, const char* outDirName, const char* suffix)
{
static size_t dfnbCapacity = 0;
static char* dstFileNameBuffer = NULL; /* using static allocation : this function cannot be multi-threaded */
char* outDirFilename = NULL;
size_t sfnSize = strlen(srcFileName);
size_t const srcSuffixLen = strlen(suffix);
if (outDirName) {
outDirFilename = FIO_createFilename_fromOutDir(srcFileName, outDirName, srcSuffixLen);
sfnSize = strlen(outDirFilename);
assert(outDirFilename != NULL);
}
if (dfnbCapacity <= sfnSize+srcSuffixLen+1) {
/* resize buffer for dstName */
free(dstFileNameBuffer);
dfnbCapacity = sfnSize + srcSuffixLen + 30;
dstFileNameBuffer = (char*)malloc(dfnbCapacity);
if (!dstFileNameBuffer) {
EXM_THROW(30, "zstd: %s", strerror(errno));
}
}
assert(dstFileNameBuffer != NULL);
if (outDirFilename) {
memcpy(dstFileNameBuffer, outDirFilename, sfnSize);
free(outDirFilename);
} else {
memcpy(dstFileNameBuffer, srcFileName, sfnSize);
}
memcpy(dstFileNameBuffer+sfnSize, suffix, srcSuffixLen+1 /* Include terminating null */);
return dstFileNameBuffer;
}
static unsigned long long FIO_getLargestFileSize(const char** inFileNames, unsigned nbFiles)
{
size_t i;
unsigned long long fileSize, maxFileSize = 0;
for (i = 0; i < nbFiles; i++) {
fileSize = UTIL_getFileSize(inFileNames[i]);
maxFileSize = fileSize > maxFileSize ? fileSize : maxFileSize;
}
return maxFileSize;
}
/* FIO_compressMultipleFilenames() :
* compress nbFiles files
* into either one destination (outFileName),
* or into one file each (outFileName == NULL, but suffix != NULL),
* or into a destination folder (specified with -O)
*/
int FIO_compressMultipleFilenames(FIO_prefs_t* const prefs,
const char** inFileNamesTable, unsigned nbFiles,
const char* outDirName,
const char* outFileName, const char* suffix,
const char* dictFileName, int compressionLevel,
ZSTD_compressionParameters comprParams)
{
int error = 0;
cRess_t ress = FIO_createCResources(prefs, dictFileName,
FIO_getLargestFileSize(inFileNamesTable, nbFiles),
compressionLevel, comprParams);
/* init */
assert(outFileName != NULL || suffix != NULL);
if (outFileName != NULL) { /* output into a single destination (stdout typically) */
ress.dstFile = FIO_openDstFile(prefs, NULL, outFileName);
if (ress.dstFile == NULL) { /* could not open outFileName */
error = 1;
} else {
unsigned u;
for (u=0; u<nbFiles; u++)
error |= FIO_compressFilename_srcFile(prefs, ress, outFileName, inFileNamesTable[u], compressionLevel);
if (fclose(ress.dstFile))
EXM_THROW(29, "Write error (%s) : cannot properly close %s",
strerror(errno), outFileName);
ress.dstFile = NULL;
}
} else {
unsigned u;
for (u=0; u<nbFiles; u++) {
const char* const srcFileName = inFileNamesTable[u];
const char* const dstFileName = FIO_determineCompressedName(srcFileName, outDirName, suffix); /* cannot fail */
error |= FIO_compressFilename_srcFile(prefs, ress, dstFileName, srcFileName, compressionLevel);
}
if (outDirName)
FIO_checkFilenameCollisions(inFileNamesTable ,nbFiles);
}
FIO_freeCResources(ress);
return error;
}
#endif /* #ifndef ZSTD_NOCOMPRESS */
#ifndef ZSTD_NODECOMPRESS
/* **************************************************************************
* Decompression
***************************************************************************/
typedef struct {
void* srcBuffer;
size_t srcBufferSize;
size_t srcBufferLoaded;
void* dstBuffer;
size_t dstBufferSize;
ZSTD_DStream* dctx;
FILE* dstFile;
} dRess_t;
static dRess_t FIO_createDResources(FIO_prefs_t* const prefs, const char* dictFileName)
{
dRess_t ress;
memset(&ress, 0, sizeof(ress));
if (prefs->patchFromMode)
FIO_adjustMemLimitForPatchFromMode(prefs, UTIL_getFileSize(dictFileName), 0 /* just use the dict size */);
/* Allocation */
ress.dctx = ZSTD_createDStream();
if (ress.dctx==NULL)
EXM_THROW(60, "Error: %s : can't create ZSTD_DStream", strerror(errno));
CHECK( ZSTD_DCtx_setMaxWindowSize(ress.dctx, prefs->memLimit) );
ress.srcBufferSize = ZSTD_DStreamInSize();
ress.srcBuffer = malloc(ress.srcBufferSize);
ress.dstBufferSize = ZSTD_DStreamOutSize();
ress.dstBuffer = malloc(ress.dstBufferSize);
if (!ress.srcBuffer || !ress.dstBuffer)
EXM_THROW(61, "Allocation error : not enough memory");
/* dictionary */
{ void* dictBuffer;
size_t const dictBufferSize = FIO_createDictBuffer(&dictBuffer, dictFileName, prefs);
CHECK( ZSTD_initDStream_usingDict(ress.dctx, dictBuffer, dictBufferSize) );
free(dictBuffer);
}
return ress;
}
static void FIO_freeDResources(dRess_t ress)
{
CHECK( ZSTD_freeDStream(ress.dctx) );
free(ress.srcBuffer);
free(ress.dstBuffer);
}
/** FIO_fwriteSparse() :
* @return : storedSkips,
* argument for next call to FIO_fwriteSparse() or FIO_fwriteSparseEnd() */
static unsigned
FIO_fwriteSparse(FILE* file,
const void* buffer, size_t bufferSize,
const FIO_prefs_t* const prefs,
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); /* check every 32 KB */
if (prefs->testMode) return 0; /* do not output anything in test mode */
if (!prefs->sparseFileSupport) { /* normal write */
size_t const sizeCheck = fwrite(buffer, 1, bufferSize, file);
if (sizeCheck != bufferSize)
EXM_THROW(70, "Write error : cannot write decoded block : %s",
strerror(errno));
return 0;
}
/* avoid int overflow */
if (storedSkips > 1 GB) {
if (LONG_SEEK(file, 1 GB, SEEK_CUR) != 0)
EXM_THROW(91, "1 GB skip error (sparse file support)");
storedSkips -= 1 GB;
}
while (ptrT < bufferTEnd) {
size_t nb0T;
/* adjust last segment if < 32 KB */
size_t seg0SizeT = segmentSizeT;
if (seg0SizeT > bufferSizeT) seg0SizeT = bufferSizeT;
bufferSizeT -= seg0SizeT;
/* count leading zeroes */
for (nb0T=0; (nb0T < seg0SizeT) && (ptrT[nb0T] == 0); nb0T++) ;
storedSkips += (unsigned)(nb0T * sizeof(size_t));
if (nb0T != seg0SizeT) { /* not all 0s */
size_t const nbNon0ST = seg0SizeT - nb0T;
/* skip leading zeros */
if (LONG_SEEK(file, storedSkips, SEEK_CUR) != 0)
EXM_THROW(92, "Sparse skip error ; try --no-sparse");
storedSkips = 0;
/* write the rest */
if (fwrite(ptrT + nb0T, sizeof(size_t), nbNon0ST, file) != nbNon0ST)
EXM_THROW(93, "Write error : cannot write decoded block : %s",
strerror(errno));
}
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;
const char* const restEnd = (const char*)buffer + bufferSize;
assert(restEnd > restStart && restEnd < restStart + sizeof(size_t));
for ( ; (restPtr < restEnd) && (*restPtr == 0); restPtr++) ;
storedSkips += (unsigned) (restPtr - restStart);
if (restPtr != restEnd) {
/* not all remaining bytes are 0 */
size_t const restSize = (size_t)(restEnd - restPtr);
if (LONG_SEEK(file, storedSkips, SEEK_CUR) != 0)
EXM_THROW(92, "Sparse skip error ; try --no-sparse");
if (fwrite(restPtr, 1, restSize, file) != restSize)
EXM_THROW(95, "Write error : cannot write end of decoded block : %s",
strerror(errno));
storedSkips = 0;
} } }
return storedSkips;
}
static void
FIO_fwriteSparseEnd(const FIO_prefs_t* const prefs, FILE* file, unsigned storedSkips)
{
if (prefs->testMode) assert(storedSkips == 0);
if (storedSkips>0) {
assert(prefs->sparseFileSupport > 0); /* storedSkips>0 implies sparse support is enabled */
(void)prefs; /* assert can be disabled, in which case prefs becomes unused */
if (LONG_SEEK(file, storedSkips-1, SEEK_CUR) != 0)
EXM_THROW(69, "Final skip error (sparse file support)");
/* last zero must be explicitly written,
* so that skipped ones get implicitly translated as zero by FS */
{ const char lastZeroByte[1] = { 0 };
if (fwrite(lastZeroByte, 1, 1, file) != 1)
EXM_THROW(69, "Write error : cannot write last zero : %s", strerror(errno));
} }
}
/** FIO_passThrough() : just copy input into output, for compatibility with gzip -df mode
@return : 0 (no error) */
static int FIO_passThrough(const FIO_prefs_t* const prefs,
FILE* foutput, FILE* finput,
void* buffer, size_t bufferSize,
size_t alreadyLoaded)
{
size_t const blockSize = MIN(64 KB, bufferSize);
size_t readFromInput;
unsigned storedSkips = 0;
/* assumption : ress->srcBufferLoaded bytes already loaded and stored within buffer */
{ size_t const sizeCheck = fwrite(buffer, 1, alreadyLoaded, foutput);
if (sizeCheck != alreadyLoaded) {
DISPLAYLEVEL(1, "Pass-through write error : %s\n", strerror(errno));
return 1;
} }
do {
readFromInput = fread(buffer, 1, blockSize, finput);
storedSkips = FIO_fwriteSparse(foutput, buffer, readFromInput, prefs, storedSkips);
} while (readFromInput == blockSize);
if (ferror(finput)) {
DISPLAYLEVEL(1, "Pass-through read error : %s\n", strerror(errno));
return 1;
}
assert(feof(finput));
FIO_fwriteSparseEnd(prefs, foutput, storedSkips);
return 0;
}
/* FIO_zstdErrorHelp() :
* detailed error message when requested window size is too large */
static void
FIO_zstdErrorHelp(const FIO_prefs_t* const prefs,
const dRess_t* ress,
size_t err, const char* srcFileName)
{
ZSTD_frameHeader header;
/* Help message only for one specific error */
if (ZSTD_getErrorCode(err) != ZSTD_error_frameParameter_windowTooLarge)
return;
/* Try to decode the frame header */
err = ZSTD_getFrameHeader(&header, ress->srcBuffer, ress->srcBufferLoaded);
if (err == 0) {
unsigned long long const windowSize = header.windowSize;
unsigned const windowLog = FIO_highbit64(windowSize) + ((windowSize & (windowSize - 1)) != 0);
assert(prefs->memLimit > 0);
DISPLAYLEVEL(1, "%s : Window size larger than maximum : %llu > %u \n",
srcFileName, windowSize, prefs->memLimit);
if (windowLog <= ZSTD_WINDOWLOG_MAX) {
unsigned const windowMB = (unsigned)((windowSize >> 20) + ((windowSize & ((1 MB) - 1)) != 0));
assert(windowSize < (U64)(1ULL << 52)); /* ensure now overflow for windowMB */
DISPLAYLEVEL(1, "%s : Use --long=%u or --memory=%uMB \n",
srcFileName, windowLog, windowMB);
return;
} }
DISPLAYLEVEL(1, "%s : Window log larger than ZSTD_WINDOWLOG_MAX=%u; not supported \n",
srcFileName, ZSTD_WINDOWLOG_MAX);
}
/** FIO_decompressFrame() :
* @return : size of decoded zstd frame, or an error code
*/
#define FIO_ERROR_FRAME_DECODING ((unsigned long long)(-2))
static unsigned long long
FIO_decompressZstdFrame(dRess_t* ress, FILE* finput,
const FIO_prefs_t* const prefs,
const char* srcFileName,
U64 alreadyDecoded) /* for multi-frames streams */
{
U64 frameSize = 0;
U32 storedSkips = 0;
/* display last 20 characters only */
{ size_t const srcFileLength = strlen(srcFileName);
if (srcFileLength>20) srcFileName += srcFileLength-20;
}
ZSTD_resetDStream(ress->dctx);
/* Header loading : ensures ZSTD_getFrameHeader() will succeed */
{ size_t const toDecode = ZSTD_FRAMEHEADERSIZE_MAX;
if (ress->srcBufferLoaded < toDecode) {
size_t const toRead = toDecode - ress->srcBufferLoaded;
void* const startPosition = (char*)ress->srcBuffer + ress->srcBufferLoaded;
ress->srcBufferLoaded += fread(startPosition, 1, toRead, finput);
} }
/* Main decompression Loop */
while (1) {
ZSTD_inBuffer inBuff = { ress->srcBuffer, ress->srcBufferLoaded, 0 };
ZSTD_outBuffer outBuff= { ress->dstBuffer, ress->dstBufferSize, 0 };
size_t const readSizeHint = ZSTD_decompressStream(ress->dctx, &outBuff, &inBuff);
if (ZSTD_isError(readSizeHint)) {
DISPLAYLEVEL(1, "%s : Decoding error (36) : %s \n",
srcFileName, ZSTD_getErrorName(readSizeHint));
FIO_zstdErrorHelp(prefs, ress, readSizeHint, srcFileName);
return FIO_ERROR_FRAME_DECODING;
}
/* Write block */
storedSkips = FIO_fwriteSparse(ress->dstFile, ress->dstBuffer, outBuff.pos, prefs, storedSkips);
frameSize += outBuff.pos;
DISPLAYUPDATE(2, "\r%-20.20s : %u MB... ",
srcFileName, (unsigned)((alreadyDecoded+frameSize)>>20) );
if (inBuff.pos > 0) {
memmove(ress->srcBuffer, (char*)ress->srcBuffer + inBuff.pos, inBuff.size - inBuff.pos);
ress->srcBufferLoaded -= inBuff.pos;
}
if (readSizeHint == 0) break; /* end of frame */
/* Fill input buffer */
{ size_t const toDecode = MIN(readSizeHint, ress->srcBufferSize); /* support large skippable frames */
if (ress->srcBufferLoaded < toDecode) {
size_t const toRead = toDecode - ress->srcBufferLoaded; /* > 0 */
void* const startPosition = (char*)ress->srcBuffer + ress->srcBufferLoaded;
size_t const readSize = fread(startPosition, 1, toRead, finput);
if (readSize==0) {
DISPLAYLEVEL(1, "%s : Read error (39) : premature end \n",
srcFileName);
return FIO_ERROR_FRAME_DECODING;
}
ress->srcBufferLoaded += readSize;
} } }
FIO_fwriteSparseEnd(prefs, ress->dstFile, storedSkips);
return frameSize;
}
#ifdef ZSTD_GZDECOMPRESS
static unsigned long long
FIO_decompressGzFrame(dRess_t* ress, FILE* srcFile,
const FIO_prefs_t* const prefs,
const char* srcFileName)
{
unsigned long long outFileSize = 0;
z_stream strm;
int flush = Z_NO_FLUSH;
int decodingError = 0;
unsigned storedSkips = 0;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
strm.next_in = 0;
strm.avail_in = 0;
/* see http://www.zlib.net/manual.html */
if (inflateInit2(&strm, 15 /* maxWindowLogSize */ + 16 /* gzip only */) != Z_OK)
return FIO_ERROR_FRAME_DECODING;
strm.next_out = (Bytef*)ress->dstBuffer;
strm.avail_out = (uInt)ress->dstBufferSize;
strm.avail_in = (uInt)ress->srcBufferLoaded;
strm.next_in = (z_const unsigned char*)ress->srcBuffer;
for ( ; ; ) {
int ret;
if (strm.avail_in == 0) {
ress->srcBufferLoaded = fread(ress->srcBuffer, 1, ress->srcBufferSize, srcFile);
if (ress->srcBufferLoaded == 0) flush = Z_FINISH;
strm.next_in = (z_const unsigned char*)ress->srcBuffer;
strm.avail_in = (uInt)ress->srcBufferLoaded;
}
ret = inflate(&strm, flush);
if (ret == Z_BUF_ERROR) {
DISPLAYLEVEL(1, "zstd: %s: premature gz end \n", srcFileName);
decodingError = 1; break;
}
if (ret != Z_OK && ret != Z_STREAM_END) {
DISPLAYLEVEL(1, "zstd: %s: inflate error %d \n", srcFileName, ret);
decodingError = 1; break;
}
{ size_t const decompBytes = ress->dstBufferSize - strm.avail_out;
if (decompBytes) {
storedSkips = FIO_fwriteSparse(ress->dstFile, ress->dstBuffer, decompBytes, prefs, storedSkips);
outFileSize += decompBytes;
strm.next_out = (Bytef*)ress->dstBuffer;
strm.avail_out = (uInt)ress->dstBufferSize;
}
}
if (ret == Z_STREAM_END) break;
}
if (strm.avail_in > 0)
memmove(ress->srcBuffer, strm.next_in, strm.avail_in);
ress->srcBufferLoaded = strm.avail_in;
if ( (inflateEnd(&strm) != Z_OK) /* release resources ; error detected */
&& (decodingError==0) ) {
DISPLAYLEVEL(1, "zstd: %s: inflateEnd error \n", srcFileName);
decodingError = 1;
}
FIO_fwriteSparseEnd(prefs, ress->dstFile, storedSkips);
return decodingError ? FIO_ERROR_FRAME_DECODING : outFileSize;
}
#endif
#ifdef ZSTD_LZMADECOMPRESS
static unsigned long long
FIO_decompressLzmaFrame(dRess_t* ress, FILE* srcFile,
const FIO_prefs_t* const prefs,
const char* srcFileName, int plain_lzma)
{
unsigned long long outFileSize = 0;
lzma_stream strm = LZMA_STREAM_INIT;
lzma_action action = LZMA_RUN;
lzma_ret initRet;
int decodingError = 0;
unsigned storedSkips = 0;
strm.next_in = 0;
strm.avail_in = 0;
if (plain_lzma) {
initRet = lzma_alone_decoder(&strm, UINT64_MAX); /* LZMA */
} else {
initRet = lzma_stream_decoder(&strm, UINT64_MAX, 0); /* XZ */
}
if (initRet != LZMA_OK) {
DISPLAYLEVEL(1, "zstd: %s: %s error %d \n",
plain_lzma ? "lzma_alone_decoder" : "lzma_stream_decoder",
srcFileName, initRet);
return FIO_ERROR_FRAME_DECODING;
}
strm.next_out = (BYTE*)ress->dstBuffer;
strm.avail_out = ress->dstBufferSize;
strm.next_in = (BYTE const*)ress->srcBuffer;
strm.avail_in = ress->srcBufferLoaded;
for ( ; ; ) {
lzma_ret ret;
if (strm.avail_in == 0) {
ress->srcBufferLoaded = fread(ress->srcBuffer, 1, ress->srcBufferSize, srcFile);
if (ress->srcBufferLoaded == 0) action = LZMA_FINISH;
strm.next_in = (BYTE const*)ress->srcBuffer;
strm.avail_in = ress->srcBufferLoaded;
}
ret = lzma_code(&strm, action);
if (ret == LZMA_BUF_ERROR) {
DISPLAYLEVEL(1, "zstd: %s: premature lzma end \n", srcFileName);
decodingError = 1; break;
}
if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
DISPLAYLEVEL(1, "zstd: %s: lzma_code decoding error %d \n",
srcFileName, ret);
decodingError = 1; break;
}
{ size_t const decompBytes = ress->dstBufferSize - strm.avail_out;
if (decompBytes) {
storedSkips = FIO_fwriteSparse(ress->dstFile, ress->dstBuffer, decompBytes, prefs, storedSkips);
outFileSize += decompBytes;
strm.next_out = (BYTE*)ress->dstBuffer;
strm.avail_out = ress->dstBufferSize;
} }
if (ret == LZMA_STREAM_END) break;
}
if (strm.avail_in > 0)
memmove(ress->srcBuffer, strm.next_in, strm.avail_in);
ress->srcBufferLoaded = strm.avail_in;
lzma_end(&strm);
FIO_fwriteSparseEnd(prefs, ress->dstFile, storedSkips);
return decodingError ? FIO_ERROR_FRAME_DECODING : outFileSize;
}
#endif
#ifdef ZSTD_LZ4DECOMPRESS
static unsigned long long
FIO_decompressLz4Frame(dRess_t* ress, FILE* srcFile,
const FIO_prefs_t* const prefs,
const char* srcFileName)
{
unsigned long long filesize = 0;
LZ4F_errorCode_t nextToLoad;
LZ4F_decompressionContext_t dCtx;
LZ4F_errorCode_t const errorCode = LZ4F_createDecompressionContext(&dCtx, LZ4F_VERSION);
int decodingError = 0;
unsigned storedSkips = 0;
if (LZ4F_isError(errorCode)) {
DISPLAYLEVEL(1, "zstd: failed to create lz4 decompression context \n");
return FIO_ERROR_FRAME_DECODING;
}
/* Init feed with magic number (already consumed from FILE* sFile) */
{ size_t inSize = 4;
size_t outSize= 0;
MEM_writeLE32(ress->srcBuffer, LZ4_MAGICNUMBER);
nextToLoad = LZ4F_decompress(dCtx, ress->dstBuffer, &outSize, ress->srcBuffer, &inSize, NULL);
if (LZ4F_isError(nextToLoad)) {
DISPLAYLEVEL(1, "zstd: %s: lz4 header error : %s \n",
srcFileName, LZ4F_getErrorName(nextToLoad));
LZ4F_freeDecompressionContext(dCtx);
return FIO_ERROR_FRAME_DECODING;
} }
/* 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(dCtx, ress->dstBuffer, &decodedBytes, (char*)(ress->srcBuffer)+pos, &remaining, NULL);
if (LZ4F_isError(nextToLoad)) {
DISPLAYLEVEL(1, "zstd: %s: lz4 decompression error : %s \n",
srcFileName, LZ4F_getErrorName(nextToLoad));
decodingError = 1; nextToLoad = 0; break;
}
pos += remaining;
/* Write Block */
if (decodedBytes) {
storedSkips = FIO_fwriteSparse(ress->dstFile, ress->dstBuffer, decodedBytes, prefs, 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)) {
DISPLAYLEVEL(1, "zstd: %s: read error \n", srcFileName);
decodingError=1;
}
if (nextToLoad!=0) {
DISPLAYLEVEL(1, "zstd: %s: unfinished lz4 stream \n", srcFileName);
decodingError=1;
}
LZ4F_freeDecompressionContext(dCtx);
ress->srcBufferLoaded = 0; /* LZ4F will reach exact frame boundary */
FIO_fwriteSparseEnd(prefs, ress->dstFile, storedSkips);
return decodingError ? FIO_ERROR_FRAME_DECODING : filesize;
}
#endif
/** FIO_decompressFrames() :
* Find and decode frames inside srcFile
* srcFile presumed opened and valid
* @return : 0 : OK
* 1 : error
*/
static int FIO_decompressFrames(dRess_t ress, FILE* srcFile,
const FIO_prefs_t* const prefs,
const char* dstFileName, const char* srcFileName)
{
unsigned readSomething = 0;
unsigned long long filesize = 0;
assert(srcFile != NULL);
/* for each frame */
for ( ; ; ) {
/* check magic number -> version */
size_t const toRead = 4;
const BYTE* const buf = (const BYTE*)ress.srcBuffer;
if (ress.srcBufferLoaded < toRead) /* load up to 4 bytes for header */
ress.srcBufferLoaded += fread((char*)ress.srcBuffer + ress.srcBufferLoaded,
(size_t)1, toRead - ress.srcBufferLoaded, srcFile);
if (ress.srcBufferLoaded==0) {
if (readSomething==0) { /* srcFile is empty (which is invalid) */
DISPLAYLEVEL(1, "zstd: %s: unexpected end of file \n", srcFileName);
return 1;
} /* else, just reached frame boundary */
break; /* no more input */
}
readSomething = 1; /* there is at least 1 byte in srcFile */
if (ress.srcBufferLoaded < toRead) {
DISPLAYLEVEL(1, "zstd: %s: unknown header \n", srcFileName);
return 1;
}
if (ZSTD_isFrame(buf, ress.srcBufferLoaded)) {
unsigned long long const frameSize = FIO_decompressZstdFrame(&ress, srcFile, prefs, srcFileName, filesize);
if (frameSize == FIO_ERROR_FRAME_DECODING) return 1;
filesize += frameSize;
} else if (buf[0] == 31 && buf[1] == 139) { /* gz magic number */
#ifdef ZSTD_GZDECOMPRESS
unsigned long long const frameSize = FIO_decompressGzFrame(&ress, srcFile, prefs, srcFileName);
if (frameSize == FIO_ERROR_FRAME_DECODING) return 1;
filesize += frameSize;
#else
DISPLAYLEVEL(1, "zstd: %s: gzip file cannot be uncompressed (zstd compiled without HAVE_ZLIB) -- ignored \n", srcFileName);
return 1;
#endif
} else if ((buf[0] == 0xFD && buf[1] == 0x37) /* xz magic number */
|| (buf[0] == 0x5D && buf[1] == 0x00)) { /* lzma header (no magic number) */
#ifdef ZSTD_LZMADECOMPRESS
unsigned long long const frameSize = FIO_decompressLzmaFrame(&ress, srcFile, prefs, srcFileName, buf[0] != 0xFD);
if (frameSize == FIO_ERROR_FRAME_DECODING) return 1;
filesize += frameSize;
#else
DISPLAYLEVEL(1, "zstd: %s: xz/lzma file cannot be uncompressed (zstd compiled without HAVE_LZMA) -- ignored \n", srcFileName);
return 1;
#endif
} else if (MEM_readLE32(buf) == LZ4_MAGICNUMBER) {
#ifdef ZSTD_LZ4DECOMPRESS
unsigned long long const frameSize = FIO_decompressLz4Frame(&ress, srcFile, prefs, srcFileName);
if (frameSize == FIO_ERROR_FRAME_DECODING) return 1;
filesize += frameSize;
#else
DISPLAYLEVEL(1, "zstd: %s: lz4 file cannot be uncompressed (zstd compiled without HAVE_LZ4) -- ignored \n", srcFileName);
return 1;
#endif
} else if ((prefs->overwrite) && !strcmp (dstFileName, stdoutmark)) { /* pass-through mode */
return FIO_passThrough(prefs,
ress.dstFile, srcFile,
ress.srcBuffer, ress.srcBufferSize,
ress.srcBufferLoaded);
} else {
DISPLAYLEVEL(1, "zstd: %s: unsupported format \n", srcFileName);
return 1;
} } /* for each frame */
/* Final Status */
DISPLAYLEVEL(2, "\r%79s\r", "");
DISPLAYLEVEL(2, "%-20s: %llu bytes \n", srcFileName, filesize);
return 0;
}
/** FIO_decompressDstFile() :
open `dstFileName`,
or path-through if ress.dstFile is already != 0,
then start decompression process (FIO_decompressFrames()).
@return : 0 : OK
1 : operation aborted
*/
static int FIO_decompressDstFile(FIO_prefs_t* const prefs,
dRess_t ress, FILE* srcFile,
const char* dstFileName, const char* srcFileName)
{
int result;
stat_t statbuf;
int transfer_permissions = 0;
int releaseDstFile = 0;
if ((ress.dstFile == NULL) && (prefs->testMode==0)) {
releaseDstFile = 1;
ress.dstFile = FIO_openDstFile(prefs, srcFileName, dstFileName);
if (ress.dstFile==NULL) return 1;
/* Must only be added after FIO_openDstFile() succeeds.
* Otherwise we may delete the destination file if it already exists,
* and the user presses Ctrl-C when asked if they wish to overwrite.
*/
addHandler(dstFileName);
if ( strcmp(srcFileName, stdinmark) /* special case : don't transfer permissions from stdin */
&& UTIL_getFileStat(srcFileName, &statbuf) )
transfer_permissions = 1;
}
result = FIO_decompressFrames(ress, srcFile, prefs, dstFileName, srcFileName);
if (releaseDstFile) {
FILE* const dstFile = ress.dstFile;
clearHandler();
ress.dstFile = NULL;
if (fclose(dstFile)) {
DISPLAYLEVEL(1, "zstd: %s: %s \n", dstFileName, strerror(errno));
result = 1;
}
if ( (result != 0) /* operation failure */
&& strcmp(dstFileName, nulmark) /* special case : don't remove() /dev/null (#316) */
&& strcmp(dstFileName, stdoutmark) /* special case : don't remove() stdout */
) {
FIO_remove(dstFileName); /* remove decompression artefact; note: don't do anything special if remove() fails */
} else { /* operation success */
if ( strcmp(dstFileName, stdoutmark) /* special case : don't chmod stdout */
&& strcmp(dstFileName, nulmark) /* special case : don't chmod /dev/null */
&& transfer_permissions ) /* file permissions correctly extracted from src */
UTIL_setFileStat(dstFileName, &statbuf); /* transfer file permissions from src into dst */
}
}
return result;
}
/** FIO_decompressSrcFile() :
Open `srcFileName`, transfer control to decompressDstFile()
@return : 0 : OK
1 : error
*/
static int FIO_decompressSrcFile(FIO_prefs_t* const prefs, dRess_t ress, const char* dstFileName, const char* srcFileName)
{
FILE* srcFile;
int result;
if (UTIL_isDirectory(srcFileName)) {
DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName);
return 1;
}
srcFile = FIO_openSrcFile(srcFileName);
if (srcFile==NULL) return 1;
ress.srcBufferLoaded = 0;
result = FIO_decompressDstFile(prefs, ress, srcFile, dstFileName, srcFileName);
/* Close file */
if (fclose(srcFile)) {
DISPLAYLEVEL(1, "zstd: %s: %s \n", srcFileName, strerror(errno)); /* error should not happen */
return 1;
}
if ( prefs->removeSrcFile /* --rm */
&& (result==0) /* decompression successful */
&& strcmp(srcFileName, stdinmark) ) /* not stdin */ {
/* We must clear the handler, since after this point calling it would
* delete both the source and destination files.
*/
clearHandler();
if (FIO_remove(srcFileName)) {
/* failed to remove src file */
DISPLAYLEVEL(1, "zstd: %s: %s \n", srcFileName, strerror(errno));
return 1;
} }
return result;
}
int FIO_decompressFilename(FIO_prefs_t* const prefs,
const char* dstFileName, const char* srcFileName,
const char* dictFileName)
{
dRess_t const ress = FIO_createDResources(prefs, dictFileName);
int const decodingError = FIO_decompressSrcFile(prefs, ress, dstFileName, srcFileName);
FIO_freeDResources(ress);
return decodingError;
}
static const char *suffixList[] = {
ZSTD_EXTENSION,
TZSTD_EXTENSION,
#ifdef ZSTD_GZDECOMPRESS
GZ_EXTENSION,
TGZ_EXTENSION,
#endif
#ifdef ZSTD_LZMADECOMPRESS
LZMA_EXTENSION,
XZ_EXTENSION,
TXZ_EXTENSION,
#endif
#ifdef ZSTD_LZ4DECOMPRESS
LZ4_EXTENSION,
TLZ4_EXTENSION,
#endif
NULL
};
static const char *suffixListStr =
ZSTD_EXTENSION "/" TZSTD_EXTENSION
#ifdef ZSTD_GZDECOMPRESS
"/" GZ_EXTENSION "/" TGZ_EXTENSION
#endif
#ifdef ZSTD_LZMADECOMPRESS
"/" LZMA_EXTENSION "/" XZ_EXTENSION "/" TXZ_EXTENSION
#endif
#ifdef ZSTD_LZ4DECOMPRESS
"/" LZ4_EXTENSION "/" TLZ4_EXTENSION
#endif
;
/* FIO_determineDstName() :
* create a destination filename from a srcFileName.
* @return a pointer to it.
* @return == NULL if there is an error */
static const char*
FIO_determineDstName(const char* srcFileName, const char* outDirName)
{
static size_t dfnbCapacity = 0;
static char* dstFileNameBuffer = NULL; /* using static allocation : this function cannot be multi-threaded */
size_t dstFileNameEndPos;
char* outDirFilename = NULL;
const char* dstSuffix = "";
size_t dstSuffixLen = 0;
size_t sfnSize = strlen(srcFileName);
size_t srcSuffixLen;
const char* const srcSuffix = strrchr(srcFileName, '.');
if (srcSuffix == NULL) {
DISPLAYLEVEL(1,
"zstd: %s: unknown suffix (%s expected). "
"Can't derive the output file name. "
"Specify it with -o dstFileName. Ignoring.\n",
srcFileName, suffixListStr);
return NULL;
}
srcSuffixLen = strlen(srcSuffix);
{
const char** matchedSuffixPtr;
for (matchedSuffixPtr = suffixList; *matchedSuffixPtr != NULL; matchedSuffixPtr++) {
if (!strcmp(*matchedSuffixPtr, srcSuffix)) {
break;
}
}
/* check suffix is authorized */
if (sfnSize <= srcSuffixLen || *matchedSuffixPtr == NULL) {
DISPLAYLEVEL(1,
"zstd: %s: unknown suffix (%s expected). "
"Can't derive the output file name. "
"Specify it with -o dstFileName. Ignoring.\n",
srcFileName, suffixListStr);
return NULL;
}