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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:08:06 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:08:06 +0200
commitfbe76102e941b9f1edaf236788e42678f05fdf9a (patch)
treef5f538316019fa89be8dc478103490c3a826f3ac /shared/fileIO.cpp
parent3.8 (diff)
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Diffstat (limited to 'shared/fileIO.cpp')
-rw-r--r--shared/fileIO.cpp181
1 files changed, 0 insertions, 181 deletions
diff --git a/shared/fileIO.cpp b/shared/fileIO.cpp
deleted file mode 100644
index 92fb7193..00000000
--- a/shared/fileIO.cpp
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@@ -1,181 +0,0 @@
-// **************************************************************************
-// * This file is part of the FreeFileSync project. It is distributed under *
-// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
-// * Copyright (C) 2008-2010 ZenJu (zhnmju123 AT gmx.de) *
-// **************************************************************************
-//
-#include "fileIO.h"
-#include <wx/intl.h>
-#include "stringConv.h"
-#include "systemFunctions.h"
-
-#ifdef FFS_WIN
-#include "longPathPrefix.h"
-#endif
-
-using namespace FreeFileSync;
-
-
-FileInput::FileInput(const Zstring& filename) : //throw FileError()
-#ifdef FFS_WIN
- eofReached(false),
-#endif
- filename_(filename)
-{
-#ifdef FFS_WIN
- fileHandle = ::CreateFile(FreeFileSync::applyLongPathPrefix(filename).c_str(),
- GENERIC_READ,
- FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, //all shared modes are required to read files that are open in other applications
- NULL,
- OPEN_EXISTING,
- FILE_FLAG_SEQUENTIAL_SCAN,
- /* possible values: (Reference http://msdn.microsoft.com/en-us/library/aa363858(VS.85).aspx#caching_behavior)
- FILE_FLAG_NO_BUFFERING
- FILE_FLAG_RANDOM_ACCESS
- FILE_FLAG_SEQUENTIAL_SCAN
-
- tests on Win7 x64 show that FILE_FLAG_SEQUENTIAL_SCAN provides best performance for binary comparison in all cases:
- - comparing different physical disks (DVD <-> HDD and HDD <-> HDD)
- - even on same physical disk! (HDD <-> HDD)
- - independent from client buffer size!
-
- tests on XP show that FILE_FLAG_SEQUENTIAL_SCAN provides best performance for binary comparison when
- - comparing different physical disks (DVD <-> HDD)
-
- while FILE_FLAG_RANDOM_ACCESS offers best performance for
- - same physical disk (HDD <-> HDD)
-
- Problem: bad XP implementation of prefetch makes flag FILE_FLAG_SEQUENTIAL_SCAN effectively load two files at once from one drive
- swapping every 64 kB (or similar). File access times explode!
- => For XP it is critical to use FILE_FLAG_RANDOM_ACCESS (to disable prefetch) if reading two files on same disk and
- FILE_FLAG_SEQUENTIAL_SCAN when reading from different disk (e.g. massive performance improvement compared to random access for DVD <-> HDD!)
- => there is no compromise that satisfies all cases! (on XP)
-
- for FFS most comparisons are probably between different disks => let's use FILE_FLAG_SEQUENTIAL_SCAN
- */
- NULL);
- if (fileHandle == INVALID_HANDLE_VALUE)
- throw FileError(wxString(_("Error opening file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
-#elif defined FFS_LINUX
- fileHandle = ::fopen(filename.c_str(), "rb,type=record,noseek"); //utilize UTF-8 filename
- if (!fileHandle)
- throw FileError(wxString(_("Error opening file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
-#endif
-}
-
-
-FileInput::~FileInput()
-{
-#ifdef FFS_WIN
- ::CloseHandle(fileHandle);
-#elif defined FFS_LINUX
- ::fclose(fileHandle); //NEVER allow passing NULL to fclose! -> crash!; fileHandle != NULL in this context!
-#endif
-}
-
-
-size_t FileInput::read(void* buffer, size_t bytesToRead) //returns actual number of bytes read; throw FileError()
-{
-#ifdef FFS_WIN
- DWORD bytesRead = 0;
-
- if (!::ReadFile(
- fileHandle, //__in HANDLE hFile,
- buffer, //__out LPVOID lpBuffer,
- static_cast<DWORD>(bytesToRead), //__in DWORD nNumberOfBytesToRead,
- &bytesRead, //__out_opt LPDWORD lpNumberOfBytesRead,
- NULL) //__inout_opt LPOVERLAPPED lpOverlapped
- || bytesRead > bytesToRead) //must be fulfilled
- throw FileError(wxString(_("Error reading file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
-
- if (bytesRead < bytesToRead)
- eofReached = true;
-
- return bytesRead;
-#elif defined FFS_LINUX
- const size_t bytesRead = ::fread(buffer, 1, bytesToRead, fileHandle);
- if (::ferror(fileHandle) != 0)
- throw FileError(wxString(_("Error reading file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
- return bytesRead;
-#endif
-}
-
-
-bool FileInput::eof() //end of file reached
-{
-#ifdef FFS_WIN
- return eofReached;
-#elif defined FFS_LINUX
- return ::feof(fileHandle) != 0;
-#endif
-}
-
-
-FileOutput::FileOutput(const Zstring& filename) : //throw FileError()
- filename_(filename)
-{
-#ifdef FFS_WIN
- fileHandle = ::CreateFile(FreeFileSync::applyLongPathPrefix(filename).c_str(),
- GENERIC_WRITE,
- FILE_SHARE_READ,
- NULL,
- CREATE_ALWAYS,
- FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
- NULL);
- if (fileHandle == INVALID_HANDLE_VALUE)
- throw FileError(wxString(_("Error writing file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
-#elif defined FFS_LINUX
- fileHandle = ::fopen(filename.c_str(), "wb,type=record,noseek"); //utilize UTF-8 filename
- if (!fileHandle)
- throw FileError(wxString(_("Error writing file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
-#endif
-}
-
-
-FileOutput::~FileOutput()
-{
- close(); //may be called more than once
-}
-
-
-void FileOutput::write(const void* buffer, size_t bytesToWrite) //throw FileError()
-{
-#ifdef FFS_WIN
- DWORD bytesWritten = 0;
-
- if (!::WriteFile(
- fileHandle, //__in HANDLE hFile,
- buffer, //__out LPVOID lpBuffer,
- static_cast<DWORD>(bytesToWrite), //__in DWORD nNumberOfBytesToRead,
- &bytesWritten, //__out_opt LPDWORD lpNumberOfBytesWritten,
- NULL) //__inout_opt LPOVERLAPPED lpOverlapped
- || bytesWritten != bytesToWrite) //must be fulfilled for synchronous writes!
- throw FileError(wxString(_("Error writing file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted());
-#elif defined FFS_LINUX
- const size_t bytesWritten = ::fwrite(buffer, 1, bytesToWrite, fileHandle);
- if (::ferror(fileHandle) != 0 || bytesWritten != bytesToWrite)
- throw FileError(wxString(_("Error writing file:")) + wxT("\n\"") + zToWx(filename_) + wxT("\"") +
- wxT("\n\n") + FreeFileSync::getLastErrorFormatted() + wxT(" (w)")); //w -> distinguish from fopen error message!
-#endif
-}
-
-
-void FileOutput::close() //close file stream
-{
- if (fileHandle != NULL) //NEVER allow passing NULL to fclose! -> crash!
- {
-#ifdef FFS_WIN
- ::CloseHandle(fileHandle);
-#elif defined FFS_LINUX
- ::fclose(fileHandle);
-#endif
- fileHandle = NULL;
- }
-}
bgstack15