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// Windows/FileIO.cpp
#include "StdAfx.h"
#include "FileIO.h"
#include "Defs.h"
#ifndef _UNICODE
#include "../Common/StringConvert.h"
#endif
#ifndef _UNICODE
extern bool g_IsNT;
#endif
namespace NWindows {
namespace NFile {
namespace NIO {
CFileBase::~CFileBase() { Close(); }
bool CFileBase::Create(LPCTSTR fileName, DWORD desiredAccess,
DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{
Close();
_handle = ::CreateFile(fileName, desiredAccess, shareMode,
(LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
flagsAndAttributes, (HANDLE) NULL);
return (_fileIsOpen = (_handle != INVALID_HANDLE_VALUE));
}
#ifndef _UNICODE
bool CFileBase::Create(LPCWSTR fileName, DWORD desiredAccess,
DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{
if (g_IsNT)
{
Close();
_handle = ::CreateFileW(fileName, desiredAccess, shareMode,
(LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
flagsAndAttributes, (HANDLE) NULL);
return (_fileIsOpen = (_handle != INVALID_HANDLE_VALUE));
}
return Create(UnicodeStringToMultiByte(fileName, ::AreFileApisANSI() ? CP_ACP : CP_OEMCP),
desiredAccess, shareMode, creationDisposition, flagsAndAttributes);
}
#endif
bool CFileBase::Close()
{
if(!_fileIsOpen)
return true;
bool result = BOOLToBool(::CloseHandle(_handle));
_fileIsOpen = !result;
return result;
}
bool CFileBase::GetPosition(UInt64 &position) const
{
return Seek(0, FILE_CURRENT, position);
}
bool CFileBase::GetLength(UInt64 &length) const
{
DWORD sizeHigh;
DWORD sizeLow = ::GetFileSize(_handle, &sizeHigh);
if(sizeLow == 0xFFFFFFFF)
if(::GetLastError() != NO_ERROR)
return false;
length = (((UInt64)sizeHigh) << 32) + sizeLow;
return true;
}
bool CFileBase::Seek(Int64 distanceToMove, DWORD moveMethod, UInt64 &newPosition) const
{
LARGE_INTEGER value;
value.QuadPart = distanceToMove;
value.LowPart = ::SetFilePointer(_handle, value.LowPart, &value.HighPart, moveMethod);
if (value.LowPart == 0xFFFFFFFF)
if(::GetLastError() != NO_ERROR)
return false;
newPosition = value.QuadPart;
return true;
}
bool CFileBase::Seek(UInt64 position, UInt64 &newPosition)
{
return Seek(position, FILE_BEGIN, newPosition);
}
bool CFileBase::SeekToBegin()
{
UInt64 newPosition;
return Seek(0, newPosition);
}
bool CFileBase::SeekToEnd(UInt64 &newPosition)
{
return Seek(0, FILE_END, newPosition);
}
bool CFileBase::GetFileInformation(CByHandleFileInfo &fileInfo) const
{
BY_HANDLE_FILE_INFORMATION winFileInfo;
if(!::GetFileInformationByHandle(_handle, &winFileInfo))
return false;
fileInfo.Attributes = winFileInfo.dwFileAttributes;
fileInfo.CreationTime = winFileInfo.ftCreationTime;
fileInfo.LastAccessTime = winFileInfo.ftLastAccessTime;
fileInfo.LastWriteTime = winFileInfo.ftLastWriteTime;
fileInfo.VolumeSerialNumber = winFileInfo.dwFileAttributes;
fileInfo.Size = (((UInt64)winFileInfo.nFileSizeHigh) << 32) + winFileInfo.nFileSizeLow;
fileInfo.NumberOfLinks = winFileInfo.nNumberOfLinks;
fileInfo.FileIndex = (((UInt64)winFileInfo.nFileIndexHigh) << 32) + winFileInfo.nFileIndexLow;
return true;
}
/////////////////////////
// CInFile
bool CInFile::Open(LPCTSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{ return Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes); }
bool CInFile::Open(LPCTSTR fileName)
{ return Open(fileName, FILE_SHARE_READ, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
#ifndef _UNICODE
bool CInFile::Open(LPCWSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{ return Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes); }
bool CInFile::Open(LPCWSTR fileName)
{ return Open(fileName, FILE_SHARE_READ, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
#endif
// 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).
static UInt32 kChunkSizeMax = (1 << 24);
bool CInFile::ReadPart(void *data, UInt32 size, UInt32 &processedSize)
{
if (size > kChunkSizeMax)
size = kChunkSizeMax;
DWORD processedLoc = 0;
bool res = BOOLToBool(::ReadFile(_handle, data, size, &processedLoc, NULL));
processedSize = (UInt32)processedLoc;
return res;
}
bool CInFile::Read(void *data, UInt32 size, UInt32 &processedSize)
{
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
bool COutFile::Open(LPCTSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{ return CFileBase::Create(fileName, GENERIC_WRITE, shareMode, creationDisposition, flagsAndAttributes); }
static inline DWORD GetCreationDisposition(bool createAlways)
{ return createAlways? CREATE_ALWAYS: CREATE_NEW; }
bool COutFile::Open(LPCTSTR fileName, DWORD creationDisposition)
{ return Open(fileName, FILE_SHARE_READ, creationDisposition, FILE_ATTRIBUTE_NORMAL); }
bool COutFile::Create(LPCTSTR fileName, bool createAlways)
{ return Open(fileName, GetCreationDisposition(createAlways)); }
#ifndef _UNICODE
bool COutFile::Open(LPCWSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
{ return CFileBase::Create(fileName, GENERIC_WRITE, shareMode, creationDisposition, flagsAndAttributes); }
bool COutFile::Open(LPCWSTR fileName, DWORD creationDisposition)
{ return Open(fileName, FILE_SHARE_READ, creationDisposition, FILE_ATTRIBUTE_NORMAL); }
bool COutFile::Create(LPCWSTR fileName, bool createAlways)
{ return Open(fileName, GetCreationDisposition(createAlways)); }
#endif
bool COutFile::SetTime(const FILETIME *creationTime, const FILETIME *lastAccessTime, const FILETIME *lastWriteTime)
{ return BOOLToBool(::SetFileTime(_handle, creationTime, lastAccessTime, lastWriteTime)); }
bool COutFile::SetLastWriteTime(const FILETIME *lastWriteTime)
{ return SetTime(NULL, NULL, lastWriteTime); }
bool COutFile::WritePart(const void *data, UInt32 size, UInt32 &processedSize)
{
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)
{
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() { return BOOLToBool(::SetEndOfFile(_handle)); }
bool COutFile::SetLength(UInt64 length)
{
UInt64 newPosition;
if(!Seek(length, newPosition))
return false;
if(newPosition != length)
return false;
return SetEndOfFile();
}
}}}
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