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zstd/programs/fileio.c
Eden Zik 78af534f82 Fixed unsafe string copy and concat in fileio.c. 
Per warnings from flawfinder: "Does not check for buffer overflows when
copying to destination [MS-banned] (CWE-120). Consider using snprintf,
strcpy_s, or strlcpy (warning: strncpy easily misused).".

Replaced called to strcpy and strcat in `fileio.c` to calls with a
specified size (`strncpy` and `strncat`).

Tested the changes on OSX, Linux, Windows.
On OSX + Linux, changes were tested with ASAN. The following flags were
used: 'check_initialization_order=1:strict_init_order=1:detect_odr_violation=1:detect_stack_use_after_return=1'

To reproduce warning:
./flawfinder.py ./programs/fileio.c
2018-08-20 22:15:24 -04:00

2077 lines
80 KiB
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/*
* Copyright (c) 2016-present, 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 */
#include <stdio.h> /* fprintf, fopen, fread, _fileno, stdin, stdout */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* strcmp, strlen */
#include <errno.h> /* errno */
#if defined (_MSC_VER)
# include <sys/stat.h>
# include <io.h>
#endif
#include "debug.h"
#include "mem.h"
#include "fileio.h"
#include "util.h"
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_magicNumber, ZSTD_frameHeaderSize_max */
#include "zstd.h"
#include "zstd_errors.h" /* ZSTD_error_frameParameter_windowTooLarge */
#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 KB *(1<<10)
#define MB *(1<<20)
#define GB *(1U<<30)
#define DICTSIZE_MAX (32 MB) /* protection against large input (attack scenario) */
#define FNSPACE 30
/*-*************************************
* Macros
***************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYOUT(...) fprintf(stdout, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) { if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); } }
static int g_displayLevel = 2; /* 0 : no display; 1: errors; 2: + result + interaction + warnings; 3: + progression; 4: + information */
void FIO_setNotificationLevel(unsigned level) { g_displayLevel=level; }
static const U64 g_refreshRate = SEC_TO_MICRO / 6;
static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;
#define READY_FOR_UPDATE() (UTIL_clockSpanMicro(g_displayClock) > g_refreshRate)
#define DELAY_NEXT_UPDATE() { g_displayClock = UTIL_getTime(); }
#define DISPLAYUPDATE(l, ...) { \
if (g_displayLevel>=l) { \
if (READY_FOR_UPDATE() || (g_displayLevel>=4)) { \
DELAY_NEXT_UPDATE(); \
DISPLAY(__VA_ARGS__); \
if (g_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: "); \
DEBUGLOG(1, "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)) { \
DEBUGLOG(1, "%s \n", #f); \
EXM_THROW(11, "%s", ZSTD_getErrorName(v)); \
}
#define CHECK(f) { size_t err; CHECK_V(err, f); }
/*-************************************
* Signal (Ctrl-C trapping)
**************************************/
#include <signal.h>
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;
}
/* ************************************************************
* Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW
***************************************************************/
#if defined(_MSC_VER) && _MSC_VER >= 1400
# define LONG_SEEK _fseeki64
#elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */
# define LONG_SEEK fseeko
#elif defined(__MINGW32__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS) && defined(__MSVCRT__)
# define LONG_SEEK fseeko64
#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;
}
#else
# define LONG_SEEK fseek
#endif
/*-*************************************
* Local Parameters - Not thread safe
***************************************/
static FIO_compressionType_t g_compressionType = FIO_zstdCompression;
void FIO_setCompressionType(FIO_compressionType_t compressionType) { g_compressionType = compressionType; }
static U32 g_overwrite = 0;
void FIO_overwriteMode(void) { g_overwrite=1; }
static U32 g_sparseFileSupport = 1; /* 0: no sparse allowed; 1: auto (file yes, stdout no); 2: force sparse */
void FIO_setSparseWrite(unsigned sparse) { g_sparseFileSupport=sparse; }
static U32 g_dictIDFlag = 1;
void FIO_setDictIDFlag(unsigned dictIDFlag) { g_dictIDFlag = dictIDFlag; }
static U32 g_checksumFlag = 1;
void FIO_setChecksumFlag(unsigned checksumFlag) { g_checksumFlag = checksumFlag; }
static U32 g_removeSrcFile = 0;
void FIO_setRemoveSrcFile(unsigned flag) { g_removeSrcFile = (flag>0); }
static U32 g_memLimit = 0;
void FIO_setMemLimit(unsigned memLimit) { g_memLimit = memLimit; }
static U32 g_nbWorkers = 1;
void FIO_setNbWorkers(unsigned nbWorkers) {
#ifndef ZSTD_MULTITHREAD
if (nbWorkers > 0) DISPLAYLEVEL(2, "Note : multi-threading is disabled \n");
#endif
g_nbWorkers = nbWorkers;
}
static U32 g_blockSize = 0;
void FIO_setBlockSize(unsigned blockSize) {
if (blockSize && g_nbWorkers==0)
DISPLAYLEVEL(2, "Setting block size is useless in single-thread mode \n");
g_blockSize = blockSize;
}
#define FIO_OVERLAP_LOG_NOTSET 9999
static U32 g_overlapLog = FIO_OVERLAP_LOG_NOTSET;
void FIO_setOverlapLog(unsigned overlapLog){
if (overlapLog && g_nbWorkers==0)
DISPLAYLEVEL(2, "Setting overlapLog is useless in single-thread mode \n");
g_overlapLog = overlapLog;
}
static U32 g_ldmFlag = 0;
void FIO_setLdmFlag(unsigned ldmFlag) {
g_ldmFlag = (ldmFlag>0);
}
static U32 g_ldmHashLog = 0;
void FIO_setLdmHashLog(unsigned ldmHashLog) {
g_ldmHashLog = ldmHashLog;
}
static U32 g_ldmMinMatch = 0;
void FIO_setLdmMinMatch(unsigned ldmMinMatch) {
g_ldmMinMatch = ldmMinMatch;
}
#define FIO_LDM_PARAM_NOTSET 9999
static U32 g_ldmBucketSizeLog = FIO_LDM_PARAM_NOTSET;
void FIO_setLdmBucketSizeLog(unsigned ldmBucketSizeLog) {
g_ldmBucketSizeLog = ldmBucketSizeLog;
}
static U32 g_ldmHashEveryLog = FIO_LDM_PARAM_NOTSET;
void FIO_setLdmHashEveryLog(unsigned ldmHashEveryLog) {
g_ldmHashEveryLog = ldmHashEveryLog;
}
/*-*************************************
* 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 */
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_isRegularFile(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(const char* dstFileName)
{
assert(dstFileName != NULL);
if (!strcmp (dstFileName, stdoutmark)) {
DISPLAYLEVEL(4,"Using stdout for output\n");
SET_BINARY_MODE(stdout);
if (g_sparseFileSupport==1) {
g_sparseFileSupport = 0;
DISPLAYLEVEL(4, "Sparse File Support is automatically disabled on stdout ; try --sparse \n");
}
return stdout;
}
if (g_sparseFileSupport == 1) {
g_sparseFileSupport = ZSTD_SPARSE_DEFAULT;
}
if (UTIL_isRegularFile(dstFileName)) {
FILE* fCheck;
if (!strcmp(dstFileName, nulmark)) {
EXM_THROW(40, "%s is unexpectedly a regular file", dstFileName);
}
/* Check if destination file already exists */
fCheck = fopen( dstFileName, "rb" );
if (fCheck != NULL) { /* dst file exists, authorization prompt */
fclose(fCheck);
if (!g_overwrite) {
if (g_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));
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)
{
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);
if (fileSize > DICTSIZE_MAX) {
EXM_THROW(32, "Dictionary file %s is too large (> %u MB)",
fileName, DICTSIZE_MAX >> 20); /* 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", fileName);
}
fclose(fileHandle);
return (size_t)fileSize;
}
#ifndef ZSTD_NOCOMPRESS
/* **********************************************************************
* Compression
************************************************************************/
typedef struct {
FILE* srcFile;
FILE* dstFile;
void* srcBuffer;
size_t srcBufferSize;
void* dstBuffer;
size_t dstBufferSize;
ZSTD_CStream* cctx;
} cRess_t;
static cRess_t FIO_createCResources(const char* dictFileName, int cLevel,
U64 srcSize,
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 : can't create ZSTD_CCtx");
ress.srcBufferSize = ZSTD_CStreamInSize();
ress.srcBuffer = malloc(ress.srcBufferSize);
ress.dstBufferSize = ZSTD_CStreamOutSize();
ress.dstBuffer = malloc(ress.dstBufferSize);
if (!ress.srcBuffer || !ress.dstBuffer)
EXM_THROW(31, "allocation error : not enough memory");
/* Advanced parameters, including dictionary */
{ void* dictBuffer;
size_t const dictBuffSize = FIO_createDictBuffer(&dictBuffer, dictFileName); /* works with dictFileName==NULL */
if (dictFileName && (dictBuffer==NULL))
EXM_THROW(32, "allocation error : can't create dictBuffer");
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_contentSizeFlag, 1) ); /* always enable content size when available (note: supposed to be default) */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_dictIDFlag, g_dictIDFlag) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_checksumFlag, g_checksumFlag) );
/* compression level */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_compressionLevel, (unsigned)cLevel) );
/* long distance matching */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_enableLongDistanceMatching, g_ldmFlag) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_ldmHashLog, g_ldmHashLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_ldmMinMatch, g_ldmMinMatch) );
if (g_ldmBucketSizeLog != FIO_LDM_PARAM_NOTSET) {
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_ldmBucketSizeLog, g_ldmBucketSizeLog) );
}
if (g_ldmHashEveryLog != FIO_LDM_PARAM_NOTSET) {
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_ldmHashEveryLog, g_ldmHashEveryLog) );
}
/* compression parameters */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_windowLog, comprParams->windowLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_chainLog, comprParams->chainLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_hashLog, comprParams->hashLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_searchLog, comprParams->searchLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_minMatch, comprParams->searchLength) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_targetLength, comprParams->targetLength) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_compressionStrategy, (U32)comprParams->strategy) );
/* multi-threading */
#ifdef ZSTD_MULTITHREAD
DISPLAYLEVEL(5,"set nb workers = %u \n", g_nbWorkers);
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_nbWorkers, g_nbWorkers) );
if ( (g_overlapLog == FIO_OVERLAP_LOG_NOTSET)
&& (cLevel == ZSTD_maxCLevel()) )
g_overlapLog = 9; /* full overlap */
if (g_overlapLog != FIO_OVERLAP_LOG_NOTSET) {
DISPLAYLEVEL(3,"set overlapLog = %u \n", g_overlapLog);
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_overlapSizeLog, g_overlapLog) );
}
#endif
/* dictionary */
CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, srcSize) ); /* set the value temporarily for dictionary loading, to adapt compression parameters */
CHECK( ZSTD_CCtx_loadDictionary(ress.cctx, dictBuffer, dictBuffSize) );
CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, ZSTD_CONTENTSIZE_UNKNOWN) ); /* reset */
free(dictBuffer);
}
return ress;
}
static void FIO_freeCResources(cRess_t ress)
{
free(ress.srcBuffer);
free(ress.dstBuffer);
ZSTD_freeCStream(ress.cctx); /* never fails */
}
#ifdef ZSTD_GZCOMPRESS
static unsigned long long FIO_compressGzFrame(cRess_t* ress,
const char* srcFileName, U64 const srcFileSize,
int compressionLevel, U64* readsize)
{
unsigned long long inFileSize = 0, outFileSize = 0;
z_stream strm;
int ret;
if (compressionLevel > Z_BEST_COMPRESSION)
compressionLevel = Z_BEST_COMPRESSION;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
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) {
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 decompBytes = ress->dstBufferSize - strm.avail_out;
if (decompBytes) {
if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes)
EXM_THROW(73, "Write error : cannot write to output file");
outFileSize += decompBytes;
strm.next_out = (Bytef*)ress->dstBuffer;
strm.avail_out = (uInt)ress->dstBufferSize;
}
}
if (srcFileSize == UTIL_FILESIZE_UNKNOWN)
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%",
(U32)(inFileSize>>20),
(double)outFileSize/inFileSize*100)
else
DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%",
(U32)(inFileSize>>20), (U32)(srcFileSize>>20),
(double)outFileSize/inFileSize*100);
}
while (1) {
ret = deflate(&strm, Z_FINISH);
{ size_t const decompBytes = ress->dstBufferSize - strm.avail_out;
if (decompBytes) {
if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes)
EXM_THROW(75, "Write error : cannot write to output file");
outFileSize += decompBytes;
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);
}
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(71, "zstd: %s: lzma_lzma_preset error", srcFileName);
ret = lzma_alone_encoder(&strm, &opt_lzma); /* LZMA */
if (ret != LZMA_OK)
EXM_THROW(71, "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(71, "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(72, "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(73, "Write error : cannot write to output file");
outFileSize += compBytes;
strm.next_out = (BYTE*)ress->dstBuffer;
strm.avail_out = ress->dstBufferSize;
} }
if (srcFileSize == UTIL_FILESIZE_UNKNOWN)
DISPLAYUPDATE(2, "\rRead : %u MB ==> %.2f%%",
(U32)(inFileSize>>20),
(double)outFileSize/inFileSize*100)
else
DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%",
(U32)(inFileSize>>20), (U32)(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, 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)g_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 : cannot write header");
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 outSize;
/* Compress Block */
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%%",
(U32)(inFileSize>>20),
(double)outFileSize/inFileSize*100)
else
DISPLAYUPDATE(2, "\rRead : %u / %u MB ==> %.2f%%",
(U32)(inFileSize>>20), (U32)(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 : cannot write compressed block"); }
/* 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 : cannot write end of stream"); }
outFileSize += headerSize;
}
*readsize = inFileSize;
LZ4F_freeCompressionContext(ctx);
return outFileSize;
}
#endif
static unsigned long long
FIO_compressZstdFrame(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;
DISPLAYLEVEL(6, "compression using zstd format \n");
/* init */
if (fileSize != UTIL_FILESIZE_UNKNOWN) {
CHECK(ZSTD_CCtx_setPledgedSrcSize(ress.cctx, fileSize));
}
(void)compressionLevel; (void)srcFileName;
/* Main compression loop */
do {
size_t result;
/* 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", (U32)inSize);
*readsize += inSize;
if ((inSize == 0) || (*readsize == fileSize))
directive = ZSTD_e_end;
result = 1;
while ((inBuff.pos != inBuff.size) /* input buffer must be entirely ingested */
|| (directive == ZSTD_e_end && result != 0) ) {
ZSTD_outBuffer outBuff = { ress.dstBuffer, ress.dstBufferSize, 0 };
CHECK_V(result, ZSTD_compress_generic(ress.cctx, &outBuff, &inBuff, directive));
/* Write compressed stream */
DISPLAYLEVEL(6, "ZSTD_compress_generic(end:%u) => intput pos(%u)<=(%u)size ; output generated %u bytes \n",
(U32)directive, (U32)inBuff.pos, (U32)inBuff.size, (U32)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 : cannot write compressed block");
compressedfilesize += outBuff.pos;
}
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;
if (g_displayLevel >= 3) {
DISPLAYUPDATE(3, "\r(L%i) Buffered :%4u MB - Consumed :%4u MB - Compressed :%4u MB => %.2f%%",
compressionLevel,
(U32)((zfp.ingested - zfp.consumed) >> 20),
(U32)(zfp.consumed >> 20),
(U32)(zfp.produced >> 20),
cShare );
} else {
/* g_displayLevel <= 2; only display notifications if == 2; */
DISPLAYLEVEL(2, "\rRead : %u ", (U32)(zfp.consumed >> 20));
if (fileSize != UTIL_FILESIZE_UNKNOWN)
DISPLAYLEVEL(2, "/ %u ", (U32)(fileSize >> 20));
DISPLAYLEVEL(2, "MB ==> %2.f%% ", cShare);
DELAY_NEXT_UPDATE();
}
}
}
} 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(cRess_t ress,
const char* dstFileName, const char* srcFileName,
int compressionLevel)
{
U64 readsize = 0;
U64 compressedfilesize = 0;
U64 const fileSize = UTIL_getFileSize(srcFileName);
DISPLAYLEVEL(5, "%s: %u bytes \n", srcFileName, (U32)fileSize);
/* compression format selection */
switch (g_compressionType) {
default:
case FIO_zstdCompression:
compressedfilesize = FIO_compressZstdFrame(&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, g_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, &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", "");
DISPLAYLEVEL(2,"%-20s :%6.2f%% (%6llu => %6llu bytes, %s) \n",
srcFileName,
(double)compressedfilesize / (readsize+(!readsize)/*avoid div by zero*/) * 100,
(unsigned long long)readsize, (unsigned long long) compressedfilesize,
dstFileName);
return 0;
}
/*! FIO_compressFilename_srcFile() :
* note : ress.destFile already opened
* @return : 0 : compression completed correctly,
* 1 : missing or pb opening srcFileName
*/
static int FIO_compressFilename_srcFile(cRess_t ress,
const char* dstFileName, const char* srcFileName,
int compressionLevel)
{
int result;
/* File check */
if (UTIL_isDirectory(srcFileName)) {
DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName);
return 1;
}
ress.srcFile = FIO_openSrcFile(srcFileName);
if (!ress.srcFile) return 1; /* srcFile could not be opened */
result = FIO_compressFilename_internal(ress, dstFileName, srcFileName, compressionLevel);
fclose(ress.srcFile);
if (g_removeSrcFile /* --rm */ && !result && strcmp(srcFileName, stdinmark)) {
/* 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;
}
/*! FIO_compressFilename_dstFile() :
* @return : 0 : compression completed correctly,
* 1 : pb
*/
static int FIO_compressFilename_dstFile(cRess_t ress,
const char* dstFileName,
const char* srcFileName,
int compressionLevel)
{
int result;
stat_t statbuf;
int stat_result = 0;
DISPLAYLEVEL(6, "FIO_compressFilename_dstFile: opening dst: %s", dstFileName);
ress.dstFile = FIO_openDstFile(dstFileName);
if (ress.dstFile==NULL) return 1; /* could not open dstFileName */
/* Must ony be added after FIO_openDstFile() succeeds.
* Otherwise we may delete the destination file if at 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))
stat_result = 1;
result = FIO_compressFilename_srcFile(ress, dstFileName, srcFileName, compressionLevel);
clearHandler();
if (fclose(ress.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)
&& stat_result)
UTIL_setFileStat(dstFileName, &statbuf);
return result;
}
int FIO_compressFilename(const char* dstFileName, const char* srcFileName,
const char* dictFileName, int compressionLevel, ZSTD_compressionParameters* comprParams)
{
clock_t const start = clock();
U64 const fileSize = UTIL_getFileSize(srcFileName);
U64 const srcSize = (fileSize == UTIL_FILESIZE_UNKNOWN) ? ZSTD_CONTENTSIZE_UNKNOWN : fileSize;
cRess_t const ress = FIO_createCResources(dictFileName, compressionLevel, srcSize, comprParams);
int const result = FIO_compressFilename_dstFile(ress, dstFileName, srcFileName, compressionLevel);
double const seconds = (double)(clock() - start) / CLOCKS_PER_SEC;
DISPLAYLEVEL(4, "Completed in %.2f sec \n", seconds);
FIO_freeCResources(ress);
return result;
}
int FIO_compressMultipleFilenames(const char** inFileNamesTable, unsigned nbFiles,
const char* outFileName, const char* suffix,
const char* dictFileName, int compressionLevel,
ZSTD_compressionParameters* comprParams)
{
int missed_files = 0;
size_t dfnSize = FNSPACE;
char* dstFileName = (char*)malloc(FNSPACE);
size_t const suffixSize = suffix ? strlen(suffix) : 0;
U64 const firstFileSize = UTIL_getFileSize(inFileNamesTable[0]);
U64 const firstSrcSize = (firstFileSize == UTIL_FILESIZE_UNKNOWN) ? ZSTD_CONTENTSIZE_UNKNOWN : firstFileSize;
U64 const srcSize = (nbFiles != 1) ? ZSTD_CONTENTSIZE_UNKNOWN : firstSrcSize ;
cRess_t ress = FIO_createCResources(dictFileName, compressionLevel, srcSize, comprParams);
/* init */
if (dstFileName==NULL)
EXM_THROW(27, "FIO_compressMultipleFilenames : allocation error for dstFileName");
if (outFileName == NULL && suffix == NULL)
EXM_THROW(28, "FIO_compressMultipleFilenames : dst unknown"); /* should never happen */
/* loop on each file */
if (outFileName != NULL) {
unsigned u;
ress.dstFile = FIO_openDstFile(outFileName);
if (ress.dstFile==NULL) { /* could not open outFileName */
missed_files = nbFiles;
} else {
for (u=0; u<nbFiles; u++)
missed_files += FIO_compressFilename_srcFile(ress, outFileName, inFileNamesTable[u], compressionLevel);
if (fclose(ress.dstFile))
EXM_THROW(29, "Write error : cannot properly close stdout");
}
} else {
unsigned u;
for (u=0; u<nbFiles; u++) {
size_t const ifnSize = strlen(inFileNamesTable[u]);
if (dfnSize <= ifnSize+suffixSize+1) { /* resize name buffer */
free(dstFileName);
dfnSize = ifnSize + 20;
dstFileName = (char*)malloc(dfnSize);
if (!dstFileName) {
EXM_THROW(30, "zstd: %s", strerror(errno));
} }
strncpy(dstFileName, inFileNamesTable[u], ifnSize+1 /* Include null */);
strncat(dstFileName, suffix, suffixSize);
missed_files += FIO_compressFilename_dstFile(ress, dstFileName, inFileNamesTable[u], compressionLevel);
} }
FIO_freeCResources(ress);
free(dstFileName);
return missed_files;
}
#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(const char* dictFileName)
{
dRess_t ress;
memset(&ress, 0, sizeof(ress));
/* Allocation */
ress.dctx = ZSTD_createDStream();
if (ress.dctx==NULL) EXM_THROW(60, "Can't create ZSTD_DStream");
CHECK( ZSTD_setDStreamParameter(ress.dctx, DStream_p_maxWindowSize, g_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);
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, to be provided to next call to FIO_fwriteSparse() of LZ4IO_fwriteSparseEnd() */
static unsigned FIO_fwriteSparse(FILE* file, const void* buffer, size_t bufferSize, unsigned storedSkips)
{
const size_t* const bufferT = (const size_t*)buffer; /* Buffer is supposed malloc'ed, hence aligned on size_t */
size_t bufferSizeT = bufferSize / sizeof(size_t);
const size_t* const bufferTEnd = bufferT + bufferSizeT;
const size_t* ptrT = bufferT;
static const size_t segmentSizeT = (32 KB) / sizeof(size_t); /* 0-test re-attempted every 32 KB */
if (!g_sparseFileSupport) { /* normal write */
size_t const sizeCheck = fwrite(buffer, 1, bufferSize, file);
if (sizeCheck != bufferSize) EXM_THROW(70, "Write error : cannot write decoded block");
return 0;
}
/* avoid int overflow */
if (storedSkips > 1 GB) {
int const seekResult = LONG_SEEK(file, 1 GB, SEEK_CUR);
if (seekResult != 0) EXM_THROW(71, "1 GB skip error (sparse file support)");
storedSkips -= 1 GB;
}
while (ptrT < bufferTEnd) {
size_t seg0SizeT = segmentSizeT;
size_t nb0T;
/* count leading zeros */
if (seg0SizeT > bufferSizeT) seg0SizeT = bufferSizeT;
bufferSizeT -= seg0SizeT;
for (nb0T=0; (nb0T < seg0SizeT) && (ptrT[nb0T] == 0); nb0T++) ;
storedSkips += (unsigned)(nb0T * sizeof(size_t));
if (nb0T != seg0SizeT) { /* not all 0s */
int const seekResult = LONG_SEEK(file, storedSkips, SEEK_CUR);
if (seekResult) EXM_THROW(72, "Sparse skip error ; try --no-sparse");
storedSkips = 0;
seg0SizeT -= nb0T;
ptrT += nb0T;
{ size_t const sizeCheck = fwrite(ptrT, sizeof(size_t), seg0SizeT, file);
if (sizeCheck != seg0SizeT)
EXM_THROW(73, "Write error : cannot write decoded block");
} }
ptrT += seg0SizeT;
}
{ static size_t const maskT = sizeof(size_t)-1;
if (bufferSize & maskT) {
/* size not multiple of sizeof(size_t) : implies end of block */
const char* const restStart = (const char*)bufferTEnd;
const char* restPtr = restStart;
size_t restSize = bufferSize & maskT;
const char* const restEnd = restStart + restSize;
for ( ; (restPtr < restEnd) && (*restPtr == 0); restPtr++) ;
storedSkips += (unsigned) (restPtr - restStart);
if (restPtr != restEnd) {
int seekResult = LONG_SEEK(file, storedSkips, SEEK_CUR);
if (seekResult)
EXM_THROW(74, "Sparse skip error ; try --no-sparse");
storedSkips = 0;
{ size_t const sizeCheck = fwrite(restPtr, 1, restEnd - restPtr, file);
if (sizeCheck != (size_t)(restEnd - restPtr))
EXM_THROW(75, "Write error : cannot write decoded end of block");
} } } }
return storedSkips;
}
static void FIO_fwriteSparseEnd(FILE* file, unsigned storedSkips)
{
if (storedSkips-->0) { /* implies g_sparseFileSupport>0 */
int const seekResult = LONG_SEEK(file, storedSkips, SEEK_CUR);
if (seekResult != 0) EXM_THROW(69, "Final skip error (sparse file)");
{ 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");
} }
}
/** FIO_passThrough() : just copy input into output, for compatibility with gzip -df mode
@return : 0 (no error) */
static unsigned FIO_passThrough(FILE* foutput, FILE* finput, void* buffer, size_t bufferSize, size_t alreadyLoaded)
{
size_t const blockSize = MIN(64 KB, bufferSize);
size_t readFromInput = 1;
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 \n");
return 1;
} }
while (readFromInput) {
readFromInput = fread(buffer, 1, blockSize, finput);
storedSkips = FIO_fwriteSparse(foutput, buffer, readFromInput, storedSkips);
}
FIO_fwriteSparseEnd(foutput, storedSkips);
return 0;
}
/* 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;
}
/* FIO_zstdErrorHelp() :
* detailed error message when requested window size is too large */
static void FIO_zstdErrorHelp(dRess_t* ress, size_t err, char const* 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;
U32 const windowLog = FIO_highbit64(windowSize) + ((windowSize & (windowSize - 1)) != 0);
U32 const windowMB = (U32)((windowSize >> 20) + ((windowSize & ((1 MB) - 1)) != 0));
assert(windowSize < (U64)(1ULL << 52));
assert(g_memLimit > 0);
DISPLAYLEVEL(1, "%s : Window size larger than maximum : %llu > %u\n",
srcFileName, windowSize, g_memLimit);
if (windowLog <= ZSTD_WINDOWLOG_MAX) {
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))
unsigned long long FIO_decompressZstdFrame(dRess_t* ress,
FILE* finput,
const char* srcFileName,
U64 alreadyDecoded)
{
U64 frameSize = 0;
U32 storedSkips = 0;
size_t const srcFileLength = strlen(srcFileName);
if (srcFileLength>20) srcFileName += srcFileLength-20; /* display last 20 characters only */
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(ress, readSizeHint, srcFileName);
return FIO_ERROR_FRAME_DECODING;
}
/* Write block */
storedSkips = FIO_fwriteSparse(ress->dstFile, ress->dstBuffer, outBuff.pos, storedSkips);
frameSize += outBuff.pos;
DISPLAYUPDATE(2, "\r%-20.20s : %u MB... ",
srcFileName, (U32)((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 */
if (inBuff.size != inBuff.pos) {
DISPLAYLEVEL(1, "%s : Decoding error (37) : should consume entire input \n",
srcFileName);
return FIO_ERROR_FRAME_DECODING;
}
/* 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(ress->dstFile, storedSkips);
return frameSize;
}
#ifdef ZSTD_GZDECOMPRESS
static unsigned long long FIO_decompressGzFrame(dRess_t* ress,
FILE* srcFile, const char* srcFileName)
{
unsigned long long outFileSize = 0;
z_stream strm;
int flush = Z_NO_FLUSH;
int decodingError = 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) {
if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes) {
DISPLAYLEVEL(1, "zstd: %s \n", strerror(errno));
decodingError = 1; break;
}
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;
}
return decodingError ? FIO_ERROR_FRAME_DECODING : outFileSize;
}
#endif
#ifdef ZSTD_LZMADECOMPRESS
static unsigned long long FIO_decompressLzmaFrame(dRess_t* ress, FILE* srcFile, 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;
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) {
if (fwrite(ress->dstBuffer, 1, decompBytes, ress->dstFile) != decompBytes) {
DISPLAYLEVEL(1, "zstd: %s \n", strerror(errno));
decodingError = 1; break;
}
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);
return decodingError ? FIO_ERROR_FRAME_DECODING : outFileSize;
}
#endif
#ifdef ZSTD_LZ4DECOMPRESS
static unsigned long long FIO_decompressLz4Frame(dRess_t* ress,
FILE* srcFile, 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;
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) {
if (fwrite(ress->dstBuffer, 1, decodedBytes, ress->dstFile) != decodedBytes) {
DISPLAYLEVEL(1, "zstd: %s \n", strerror(errno));
decodingError = 1; nextToLoad = 0; break;
}
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 */
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 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, 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, 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, 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, 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 ((g_overwrite) && !strcmp (dstFileName, stdoutmark)) { /* pass-through mode */
return FIO_passThrough(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_decompressSrcFile() :
Decompression `srcFileName` into `ress.dstFile`
@return : 0 : OK
1 : operation not started
*/
static int FIO_decompressSrcFile(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;
result = FIO_decompressFrames(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 ( g_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;
}
/** FIO_decompressFile_extRess() :
decompress `srcFileName` into `dstFileName`
@return : 0 : OK
1 : operation aborted (src not available, dst already taken, etc.)
*/
static int FIO_decompressDstFile(dRess_t ress,
const char* dstFileName, const char* srcFileName)
{
int result;
stat_t statbuf;
int stat_result = 0;
ress.dstFile = FIO_openDstFile(dstFileName);
if (ress.dstFile==0) return 1;
/* Must ony be added after FIO_openDstFile() succeeds.
* Otherwise we may delete the destination file if at 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) )
stat_result = 1;
result = FIO_decompressSrcFile(ress, dstFileName, srcFileName);
clearHandler();
if (fclose(ress.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 */
&& stat_result ) /* file permissions correctly extracted from src */
UTIL_setFileStat(dstFileName, &statbuf); /* transfer file permissions from src into dst */
}
signal(SIGINT, SIG_DFL);
return result;
}
int FIO_decompressFilename(const char* dstFileName, const char* srcFileName,
const char* dictFileName)
{
dRess_t const ress = FIO_createDResources(dictFileName);
int const decodingError = FIO_decompressDstFile(ress, dstFileName, srcFileName);
FIO_freeDResources(ress);
return decodingError;
}
#define MAXSUFFIXSIZE 8
int FIO_decompressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
const char* outFileName,
const char* dictFileName)
{
int skippedFiles = 0;
int missingFiles = 0;
dRess_t ress = FIO_createDResources(dictFileName);
if (outFileName) {
unsigned u;
ress.dstFile = FIO_openDstFile(outFileName);
if (ress.dstFile == 0) EXM_THROW(71, "cannot open %s", outFileName);
for (u=0; u<nbFiles; u++)
missingFiles += FIO_decompressSrcFile(ress, outFileName, srcNamesTable[u]);
if (fclose(ress.dstFile))
EXM_THROW(72, "Write error : cannot properly close output file");
} else {
size_t suffixSize;
size_t dfnSize = FNSPACE;
unsigned u;
char* dstFileName = (char*)malloc(FNSPACE);
if (dstFileName==NULL)
EXM_THROW(73, "not enough memory for dstFileName");
for (u=0; u<nbFiles; u++) { /* create dstFileName */
const char* const srcFileName = srcNamesTable[u];
const char* const suffixPtr = strrchr(srcFileName, '.');
size_t const sfnSize = strlen(srcFileName);
if (!suffixPtr) {
DISPLAYLEVEL(1, "zstd: %s: unknown suffix -- ignored \n",
srcFileName);
skippedFiles++;
continue;
}
suffixSize = strlen(suffixPtr);
if (dfnSize+suffixSize <= sfnSize+1) {
free(dstFileName);
dfnSize = sfnSize + 20;
dstFileName = (char*)malloc(dfnSize);
if (dstFileName==NULL)
EXM_THROW(74, "not enough memory for dstFileName");
}
if (sfnSize <= suffixSize
|| (strcmp(suffixPtr, GZ_EXTENSION)
&& strcmp(suffixPtr, XZ_EXTENSION)
&& strcmp(suffixPtr, ZSTD_EXTENSION)
&& strcmp(suffixPtr, LZMA_EXTENSION)
&& strcmp(suffixPtr, LZ4_EXTENSION)) ) {
const char* suffixlist = ZSTD_EXTENSION
#ifdef ZSTD_GZCOMPRESS
"/" GZ_EXTENSION
#endif
#ifdef ZSTD_LZMACOMPRESS
"/" XZ_EXTENSION "/" LZMA_EXTENSION
#endif
#ifdef ZSTD_LZ4COMPRESS
"/" LZ4_EXTENSION
#endif
;
DISPLAYLEVEL(1, "zstd: %s: unknown suffix (%s expected) -- ignored \n",
srcFileName, suffixlist);
skippedFiles++;
continue;
} else {
memcpy(dstFileName, srcFileName, sfnSize - suffixSize);
dstFileName[sfnSize-suffixSize] = '\0';
}
missingFiles += FIO_decompressDstFile(ress, dstFileName, srcFileName);
}
free(dstFileName);
}
FIO_freeDResources(ress);
return missingFiles + skippedFiles;
}
/* **************************************************************************
* .zst file info (--list command)
***************************************************************************/
typedef struct {
U64 decompressedSize;
U64 compressedSize;
U64 windowSize;
int numActualFrames;
int numSkippableFrames;
int decompUnavailable;
int usesCheck;
U32 nbFiles;
} fileInfo_t;
/** getFileInfo() :
* Reads information from file, stores in *info
* @return : 0 if successful
* 1 for frame analysis error
* 2 for file not compressed with zstd
* 3 for cases in which file could not be opened.
*/
static int getFileInfo_fileConfirmed(fileInfo_t* info, const char* inFileName){
int detectError = 0;
FILE* const srcFile = FIO_openSrcFile(inFileName);
if (srcFile == NULL) {
DISPLAY("Error: could not open source file %s\n", inFileName);
return 3;
}
info->compressedSize = UTIL_getFileSize(inFileName);
/* begin analyzing frame */
for ( ; ; ) {
BYTE headerBuffer[ZSTD_FRAMEHEADERSIZE_MAX];
size_t const numBytesRead = fread(headerBuffer, 1, sizeof(headerBuffer), srcFile);
if (numBytesRead < ZSTD_frameHeaderSize_min) {
if ( feof(srcFile)
&& (numBytesRead == 0)
&& (info->compressedSize > 0)
&& (info->compressedSize != UTIL_FILESIZE_UNKNOWN) ) {
break;
}
else if (feof(srcFile)) {
DISPLAY("Error: reached end of file with incomplete frame\n");
detectError = 2;
break;
}
else {
DISPLAY("Error: did not reach end of file but ran out of frames\n");
detectError = 1;
break;
}
}
{ U32 const magicNumber = MEM_readLE32(headerBuffer);
/* Zstandard frame */
if (magicNumber == ZSTD_MAGICNUMBER) {
ZSTD_frameHeader header;
U64 const frameContentSize = ZSTD_getFrameContentSize(headerBuffer, numBytesRead);
if (frameContentSize == ZSTD_CONTENTSIZE_ERROR || frameContentSize == ZSTD_CONTENTSIZE_UNKNOWN) {
info->decompUnavailable = 1;
} else {
info->decompressedSize += frameContentSize;
}
if (ZSTD_getFrameHeader(&header, headerBuffer, numBytesRead) != 0) {
DISPLAY("Error: could not decode frame header\n");
detectError = 1;
break;
}
info->windowSize = header.windowSize;
/* move to the end of the frame header */
{ size_t const headerSize = ZSTD_frameHeaderSize(headerBuffer, numBytesRead);
if (ZSTD_isError(headerSize)) {
DISPLAY("Error: could not determine frame header size\n");
detectError = 1;
break;
}
{ int const ret = fseek(srcFile, ((long)headerSize)-((long)numBytesRead), SEEK_CUR);
if (ret != 0) {
DISPLAY("Error: could not move to end of frame header\n");
detectError = 1;
break;
} } }
/* skip the rest of the blocks in the frame */
{ int lastBlock = 0;
do {
BYTE blockHeaderBuffer[3];
size_t const readBytes = fread(blockHeaderBuffer, 1, 3, srcFile);
if (readBytes != 3) {
DISPLAY("There was a problem reading the block header\n");
detectError = 1;
break;
}
{ U32 const blockHeader = MEM_readLE24(blockHeaderBuffer);
U32 const blockTypeID = (blockHeader >> 1) & 3;
U32 const isRLE = (blockTypeID == 1);
U32 const isWrongBlock = (blockTypeID == 3);
long const blockSize = isRLE ? 1 : (long)(blockHeader >> 3);
if (isWrongBlock) {
DISPLAY("Error: unsupported block type \n");
detectError = 1;
break;
}
lastBlock = blockHeader & 1;
{ int const ret = fseek(srcFile, blockSize, SEEK_CUR);
if (ret != 0) {
DISPLAY("Error: could not skip to end of block\n");
detectError = 1;
break;
} } }
} while (lastBlock != 1);
if (detectError) break;
}
/* check if checksum is used */
{ BYTE const frameHeaderDescriptor = headerBuffer[4];
int const contentChecksumFlag = (frameHeaderDescriptor & (1 << 2)) >> 2;
if (contentChecksumFlag) {
int const ret = fseek(srcFile, 4, SEEK_CUR);
info->usesCheck = 1;
if (ret != 0) {
DISPLAY("Error: could not skip past checksum\n");
detectError = 1;
break;
} } }
info->numActualFrames++;
}
/* Skippable frame */
else if ((magicNumber & 0xFFFFFFF0U) == ZSTD_MAGIC_SKIPPABLE_START) {
U32 const frameSize = MEM_readLE32(headerBuffer + 4);
long const seek = (long)(8 + frameSize - numBytesRead);
int const ret = LONG_SEEK(srcFile, seek, SEEK_CUR);
if (ret != 0) {
DISPLAY("Error: could not find end of skippable frame\n");
detectError = 1;
break;
}
info->numSkippableFrames++;
}
/* unknown content */
else {
detectError = 2;
break;
}
}
} /* end analyzing frame */
fclose(srcFile);
info->nbFiles = 1;
return detectError;
}
static int getFileInfo(fileInfo_t* info, const char* srcFileName)
{
int const isAFile = UTIL_isRegularFile(srcFileName);
if (!isAFile) {
DISPLAY("Error : %s is not a file", srcFileName);
return 3;
}
return getFileInfo_fileConfirmed(info, srcFileName);
}
static void displayInfo(const char* inFileName, const fileInfo_t* info, int displayLevel){
unsigned const unit = info->compressedSize < (1 MB) ? (1 KB) : (1 MB);
const char* const unitStr = info->compressedSize < (1 MB) ? "KB" : "MB";
double const windowSizeUnit = (double)info->windowSize / unit;
double const compressedSizeUnit = (double)info->compressedSize / unit;
double const decompressedSizeUnit = (double)info->decompressedSize / unit;
double const ratio = (info->compressedSize == 0) ? 0 : ((double)info->decompressedSize)/info->compressedSize;
const char* const checkString = (info->usesCheck ? "XXH64" : "None");
if (displayLevel <= 2) {
if (!info->decompUnavailable) {
DISPLAYOUT("%6d %5d %7.2f %2s %9.2f %2s %5.3f %5s %s\n",
info->numSkippableFrames + info->numActualFrames,
info->numSkippableFrames,
compressedSizeUnit, unitStr, decompressedSizeUnit, unitStr,
ratio, checkString, inFileName);
} else {
DISPLAYOUT("%6d %5d %7.2f %2s %5s %s\n",
info->numSkippableFrames + info->numActualFrames,
info->numSkippableFrames,
compressedSizeUnit, unitStr,
checkString, inFileName);
}
} else {
DISPLAYOUT("%s \n", inFileName);
DISPLAYOUT("# Zstandard Frames: %d\n", info->numActualFrames);
if (info->numSkippableFrames)
DISPLAYOUT("# Skippable Frames: %d\n", info->numSkippableFrames);
DISPLAYOUT("Window Size: %.2f %2s (%llu B)\n",
windowSizeUnit, unitStr,
(unsigned long long)info->windowSize);
DISPLAYOUT("Compressed Size: %.2f %2s (%llu B)\n",
compressedSizeUnit, unitStr,
(unsigned long long)info->compressedSize);
if (!info->decompUnavailable) {
DISPLAYOUT("Decompressed Size: %.2f %2s (%llu B)\n",
decompressedSizeUnit, unitStr,
(unsigned long long)info->decompressedSize);
DISPLAYOUT("Ratio: %.4f\n", ratio);
}
DISPLAYOUT("Check: %s\n", checkString);
DISPLAYOUT("\n");
}
}
static fileInfo_t FIO_addFInfo(fileInfo_t fi1, fileInfo_t fi2)
{
fileInfo_t total;
memset(&total, 0, sizeof(total));
total.numActualFrames = fi1.numActualFrames + fi2.numActualFrames;
total.numSkippableFrames = fi1.numSkippableFrames + fi2.numSkippableFrames;
total.compressedSize = fi1.compressedSize + fi2.compressedSize;
total.decompressedSize = fi1.decompressedSize + fi2.decompressedSize;
total.decompUnavailable = fi1.decompUnavailable | fi2.decompUnavailable;
total.usesCheck = fi1.usesCheck & fi2.usesCheck;
total.nbFiles = fi1.nbFiles + fi2.nbFiles;
return total;
}
static int FIO_listFile(fileInfo_t* total, const char* inFileName, int displayLevel){
fileInfo_t info;
memset(&info, 0, sizeof(info));
{ int const error = getFileInfo(&info, inFileName);
if (error == 1) {
/* display error, but provide output */
DISPLAY("An error occurred while getting file info \n");
}
else if (error == 2) {
DISPLAYOUT("File %s not compressed by zstd \n", inFileName);
if (displayLevel > 2) DISPLAYOUT("\n");
return 1;
}
else if (error == 3) {
/* error occurred while opening the file */
if (displayLevel > 2) DISPLAYOUT("\n");
return 1;
}
displayInfo(inFileName, &info, displayLevel);
*total = FIO_addFInfo(*total, info);
return error;
}
}
int FIO_listMultipleFiles(unsigned numFiles, const char** filenameTable, int displayLevel){
unsigned u;
for (u=0; u<numFiles;u++) {
if (!strcmp (filenameTable[u], stdinmark)) {
DISPLAYOUT("zstd: --list does not support reading from standard input\n");
return 1;
}
}
if (numFiles == 0) {
if (!IS_CONSOLE(stdin)) {
DISPLAYOUT("zstd: --list does not support reading from standard input\n");
}
DISPLAYOUT("No files given\n");
return 1;
}
if (displayLevel <= 2) {
DISPLAYOUT("Frames Skips Compressed Uncompressed Ratio Check Filename\n");
}
{ int error = 0;
fileInfo_t total;
memset(&total, 0, sizeof(total));
total.usesCheck = 1;
for (u=0; u<numFiles;u++) {
error |= FIO_listFile(&total, filenameTable[u], displayLevel);
}
if (numFiles > 1 && displayLevel <= 2) { /* display total */
unsigned const unit = total.compressedSize < (1 MB) ? (1 KB) : (1 MB);
const char* const unitStr = total.compressedSize < (1 MB) ? "KB" : "MB";
double const compressedSizeUnit = (double)total.compressedSize / unit;
double const decompressedSizeUnit = (double)total.decompressedSize / unit;
double const ratio = (total.compressedSize == 0) ? 0 : ((double)total.decompressedSize)/total.compressedSize;
const char* const checkString = (total.usesCheck ? "XXH64" : "");
DISPLAYOUT("----------------------------------------------------------------- \n");
if (total.decompUnavailable) {
DISPLAYOUT("%6d %5d %7.2f %2s %5s %u files\n",
total.numSkippableFrames + total.numActualFrames,
total.numSkippableFrames,
compressedSizeUnit, unitStr,
checkString, total.nbFiles);
} else {
DISPLAYOUT("%6d %5d %7.2f %2s %9.2f %2s %5.3f %5s %u files\n",
total.numSkippableFrames + total.numActualFrames,
total.numSkippableFrames,
compressedSizeUnit, unitStr, decompressedSizeUnit, unitStr,
ratio, checkString, total.nbFiles);
} }
return error;
}
}
#endif /* #ifndef ZSTD_NODECOMPRESS */
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