// Windows/FileIO.cpp
#include "StdAfx.h"
#ifdef SUPPORT_DEVICE_FILE
#include "../../C/Alloc.h"
#endif
#include "FileIO.h"
#include "FileName.h"
#ifndef _UNICODE
extern bool g_IsNT;
#endif
using namespace NWindows;
using namespace NFile;
using namespace NName;
namespace NWindows {
namespace NFile {
#ifdef SUPPORT_DEVICE_FILE
namespace NSystem
{
bool MyGetDiskFreeSpace(CFSTR rootPath, UInt64 &clusterSize, UInt64 &totalSize, UInt64 &freeSize);
}
#endif
namespace NIO {
/*
WinXP - 64 CreateFile ( ) :
" " - ERROR_PATH_NOT_FOUND
: stream - OK
. : stream - ERROR_PATH_NOT_FOUND
. \ : stream - OK
folder \ : stream - ERROR_INVALID_NAME
folder : stream - OK
c : \ : stream - OK
c : : stream - ERROR_INVALID_NAME , if current dir is NOT ROOT ( c : \ dir1 )
c : : stream - OK , if current dir is ROOT ( c : \ )
*/
bool CFileBase::Create(CFSTR path, DWORD desiredAccess,
DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{
if (!Close())
return false ;
#ifdef SUPPORT_DEVICE_FILE
IsDeviceFile = false ;
#endif
#ifndef _UNICODE
if (!g_IsNT)
{
_handle = ::CreateFile(fs2fas(path), desiredAccess, shareMode,
(LPSECURITY_ATTRIBUTES)NULL, creationDisposition, flagsAndAttributes, (HANDLE)NULL);
}
else
#endif
{
IF_USE_MAIN_PATH
_handle = ::CreateFileW(fs2us(path), desiredAccess, shareMode,
(LPSECURITY_ATTRIBUTES)NULL, creationDisposition, flagsAndAttributes, (HANDLE)NULL);
#ifdef WIN_LONG_PATH
if (_handle == INVALID_HANDLE_VALUE && USE_SUPER_PATH)
{
UString superPath;
if (GetSuperPath(path, superPath, USE_MAIN_PATH))
_handle = ::CreateFileW(superPath, desiredAccess, shareMode,
(LPSECURITY_ATTRIBUTES)NULL, creationDisposition, flagsAndAttributes, (HANDLE)NULL);
}
#endif
}
return (_handle != INVALID_HANDLE_VALUE);
}
bool CFileBase::Close() throw ()
{
if (_handle == INVALID_HANDLE_VALUE)
return true ;
if (!::CloseHandle(_handle))
return false ;
_handle = INVALID_HANDLE_VALUE;
return true ;
}
bool CFileBase::GetPosition(UInt64 &position) const throw ()
{
return Seek(0 , FILE_CURRENT, position);
}
bool CFileBase::GetLength(UInt64 &length) const throw ()
{
#ifdef SUPPORT_DEVICE_FILE
if (IsDeviceFile && SizeDefined)
{
length = Size;
return true ;
}
#endif
DWORD sizeHigh;
DWORD sizeLow = ::GetFileSize(_handle, &sizeHigh);
if (sizeLow == 0 xFFFFFFFF)
if (::GetLastError() != NO_ERROR)
return false ;
length = (((UInt64)sizeHigh) << 32 ) + sizeLow;
return true ;
}
bool CFileBase::Seek(Int64 distanceToMove, DWORD moveMethod, UInt64 &newPosition) const throw ()
{
#ifdef SUPPORT_DEVICE_FILE
if (IsDeviceFile && SizeDefined && moveMethod == FILE_END)
{
distanceToMove += Size;
moveMethod = FILE_BEGIN;
}
#endif
LONG high = (LONG )(distanceToMove >> 32 );
DWORD low = ::SetFilePointer(_handle, (LONG )(distanceToMove & 0 xFFFFFFFF), &high, moveMethod);
if (low == 0 xFFFFFFFF)
if (::GetLastError() != NO_ERROR)
return false ;
newPosition = (((UInt64)(UInt32)high) << 32 ) + low;
return true ;
}
bool CFileBase::Seek(UInt64 position, UInt64 &newPosition) const throw ()
{
return Seek(position, FILE_BEGIN, newPosition);
}
bool CFileBase::SeekToBegin() const throw ()
{
UInt64 newPosition;
return Seek(0 , newPosition);
}
bool CFileBase::SeekToEnd(UInt64 &newPosition) const throw ()
{
return Seek(0 , FILE_END, newPosition);
}
// ---------- CInFile ---------
#ifdef SUPPORT_DEVICE_FILE
void CInFile::CorrectDeviceSize()
{
// maybe we must decrease kClusterSize to 1 << 12, if we want correct size at tail
static const UInt32 kClusterSize = 1 << 14 ;
UInt64 pos = Size & ~(UInt64)(kClusterSize - 1 );
UInt64 realNewPosition;
if (!Seek(pos, realNewPosition))
return ;
Byte *buf = (Byte *)MidAlloc(kClusterSize);
bool needbackward = true ;
for (;;)
{
UInt32 processed = 0 ;
// up test is slow for "PhysicalDrive".
// processed size for latest block for "PhysicalDrive0" is 0.
if (!Read1(buf, kClusterSize, processed))
break ;
if (processed == 0 )
break ;
needbackward = false ;
Size = pos + processed;
if (processed != kClusterSize)
break ;
pos += kClusterSize;
}
if (needbackward && pos != 0 )
{
pos -= kClusterSize;
for (;;)
{
// break;
if (!Seek(pos, realNewPosition))
break ;
if (!buf)
{
buf = (Byte *)MidAlloc(kClusterSize);
if (!buf)
break ;
}
UInt32 processed = 0 ;
// that code doesn't work for "PhysicalDrive0"
if (!Read1(buf, kClusterSize, processed))
break ;
if (processed != 0 )
{
Size = pos + processed;
break ;
}
if (pos == 0 )
break ;
pos -= kClusterSize;
}
}
MidFree(buf);
}
void CInFile::CalcDeviceSize(CFSTR s)
{
SizeDefined = false ;
Size = 0 ;
if (_handle == INVALID_HANDLE_VALUE || !IsDeviceFile)
return ;
#ifdef UNDER_CE
SizeDefined = true ;
Size = 128 << 20 ;
#else
PARTITION_INFORMATION partInfo;
bool needCorrectSize = true ;
/*
WinXP 64 - bit :
HDD \ \ . \ PhysicalDrive0 ( MBR ) :
GetPartitionInfo = = GeometryEx : corrrect size ? ( includes tail )
Geometry : smaller than GeometryEx ( no tail , maybe correct too ? )
MyGetDiskFreeSpace : FAIL
Size correction is slow and block size ( kClusterSize ) must be small ?
HDD partition \ \ . \ N : ( NTFS ) :
MyGetDiskFreeSpace : Size of NTFS clusters . Same size can be calculated after correction
GetPartitionInfo : size of partition data : NTFS clusters + TAIL ; TAIL contains extra empty sectors and copy of first sector of NTFS
Geometry / CdRomGeometry / GeometryEx : size of HDD ( not that partition )
CD - ROM drive ( ISO ) :
MyGetDiskFreeSpace : correct size . Same size can be calculated after correction
Geometry = = CdRomGeometry : smaller than corrrect size
GetPartitionInfo = = GeometryEx : larger than corrrect size
Floppy \ \ . \ a : ( FAT ) :
Geometry : correct size .
CdRomGeometry / GeometryEx / GetPartitionInfo / MyGetDiskFreeSpace - FAIL
correction works OK for FAT .
correction works OK for non - FAT , if kClusterSize = 512 .
*/
if (GetPartitionInfo(&partInfo))
{
Size = partInfo.PartitionLength.QuadPart;
SizeDefined = true ;
needCorrectSize = false ;
if ((s)[0 ] == '\\' && (s)[1 ] == '\\' && (s)[2 ] == '.' && (s)[3 ] == '\\' && (s)[5 ] == ':' && (s)[6 ] == 0 )
{
FChar path[4 ] = { s[4 ], ':' , '\\' , 0 };
UInt64 clusterSize, totalSize, freeSize;
if (NSystem::MyGetDiskFreeSpace(path, clusterSize, totalSize, freeSize))
Size = totalSize;
else
needCorrectSize = true ;
}
}
if (!SizeDefined)
{
my_DISK_GEOMETRY_EX geomEx;
SizeDefined = GetGeometryEx(&geomEx);
if (SizeDefined)
Size = geomEx.DiskSize.QuadPart;
else
{
DISK_GEOMETRY geom;
SizeDefined = GetGeometry(&geom);
if (!SizeDefined)
SizeDefined = GetCdRomGeometry(&geom);
if (SizeDefined)
Size = geom.Cylinders.QuadPart * geom.TracksPerCylinder * geom.SectorsPerTrack * geom.BytesPerSector;
}
}
if (needCorrectSize && SizeDefined && Size != 0 )
{
CorrectDeviceSize();
SeekToBegin();
}
// SeekToBegin();
#endif
}
// ((desiredAccess & (FILE_WRITE_DATA | FILE_APPEND_DATA | GENERIC_WRITE)) == 0 &&
#define MY_DEVICE_EXTRA_CODE \
IsDeviceFile = IsDevicePath(fileName); \
CalcDeviceSize(fileName);
#else
#define MY_DEVICE_EXTRA_CODE
#endif
bool CInFile::Open(CFSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{
bool res = Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes);
MY_DEVICE_EXTRA_CODE
return res;
}
bool CInFile::OpenShared(CFSTR fileName, bool shareForWrite)
{ return Open(fileName, FILE_SHARE_READ | (shareForWrite ? FILE_SHARE_WRITE : 0 ), OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
bool CInFile::Open(CFSTR fileName)
{ return OpenShared(fileName, false ); }
// ReadFile and WriteFile functions in Windows have BUG:
// If you Read or Write 64MB or more (probably min_failure_size = 64MB - 32KB + 1)
// from/to Network file, it returns ERROR_NO_SYSTEM_RESOURCES
// (Insufficient system resources exist to complete the requested service).
// Probably in some version of Windows there are problems with other sizes:
// for 32 MB (maybe also for 16 MB).
// And message can be "Network connection was lost"
static UInt32 kChunkSizeMax = (1 << 22 );
bool CInFile::Read1(void *data, UInt32 size, UInt32 &processedSize) throw ()
{
DWORD processedLoc = 0 ;
bool res = BOOLToBool(::ReadFile(_handle, data, size, &processedLoc, NULL));
processedSize = (UInt32)processedLoc;
return res;
}
bool CInFile::ReadPart(void *data, UInt32 size, UInt32 &processedSize) throw ()
{
if (size > kChunkSizeMax)
size = kChunkSizeMax;
return Read1(data, size, processedSize);
}
bool CInFile::Read(void *data, UInt32 size, UInt32 &processedSize) throw ()
{
processedSize = 0 ;
do
{
UInt32 processedLoc = 0 ;
bool res = ReadPart(data, size, processedLoc);
processedSize += processedLoc;
if (!res)
return false ;
if (processedLoc == 0 )
return true ;
data = (void *)((unsigned char *)data + processedLoc);
size -= processedLoc;
}
while (size > 0 );
return true ;
}
// ---------- COutFile ---------
static inline DWORD GetCreationDisposition(bool createAlways)
{ return createAlways? CREATE_ALWAYS: CREATE_NEW; }
bool COutFile::Open(CFSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{ return CFileBase::Create(fileName, GENERIC_WRITE, shareMode, creationDisposition, flagsAndAttributes); }
bool COutFile::Open(CFSTR fileName, DWORD creationDisposition)
{ return Open(fileName, FILE_SHARE_READ, creationDisposition, FILE_ATTRIBUTE_NORMAL); }
bool COutFile::Create(CFSTR fileName, bool createAlways)
{ return Open(fileName, GetCreationDisposition(createAlways)); }
bool COutFile::CreateAlways(CFSTR fileName, DWORD flagsAndAttributes)
{ return Open(fileName, FILE_SHARE_READ, GetCreationDisposition(true ), flagsAndAttributes); }
bool COutFile::SetTime(const FILETIME *cTime, const FILETIME *aTime, const FILETIME *mTime) throw ()
{ return BOOLToBool(::SetFileTime(_handle, cTime, aTime, mTime)); }
bool COutFile::SetMTime(const FILETIME *mTime) throw () { return SetTime(NULL, NULL, mTime); }
bool COutFile::WritePart(const void *data, UInt32 size, UInt32 &processedSize) throw ()
{
if (size > kChunkSizeMax)
size = kChunkSizeMax;
DWORD processedLoc = 0 ;
bool res = BOOLToBool(::WriteFile(_handle, data, size, &processedLoc, NULL));
processedSize = (UInt32)processedLoc;
return res;
}
bool COutFile::Write(const void *data, UInt32 size, UInt32 &processedSize) throw ()
{
processedSize = 0 ;
do
{
UInt32 processedLoc = 0 ;
bool res = WritePart(data, size, processedLoc);
processedSize += processedLoc;
if (!res)
return false ;
if (processedLoc == 0 )
return true ;
data = (const void *)((const unsigned char *)data + processedLoc);
size -= processedLoc;
}
while (size > 0 );
return true ;
}
bool COutFile::SetEndOfFile() throw () { return BOOLToBool(::SetEndOfFile(_handle)); }
bool COutFile::SetLength(UInt64 length) throw ()
{
UInt64 newPosition;
if (!Seek(length, newPosition))
return false ;
if (newPosition != length)
return false ;
return SetEndOfFile();
}
}}}
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