diff options
Diffstat (limited to 'shared/fileIO.cpp')
| -rw-r--r-- | shared/fileIO.cpp | 181 |
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 +++ /dev/null @@ -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; - } -} |