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// **************************************************************************
// * 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) *
// **************************************************************************
//
#ifndef FILEID_H_INCLUDED
#define FILEID_H_INCLUDED
#include <wx/stream.h>
#include "zstring.h"
#ifdef FFS_WIN
#elif defined FFS_LINUX
#include <sys/stat.h>
#endif
//unique file identifier
namespace util
{
class FileID
{
public:
//standard copy constructor and assignment operator are okay!
FileID(wxInputStream& stream); //read
void toStream(wxOutputStream& stream) const; //write
bool isNull() const;
bool operator==(const FileID& rhs) const;
bool operator!=(const FileID& rhs) const;
bool operator<(const FileID& rhs) const;
FileID();
#ifdef FFS_WIN
typedef unsigned long DWORD_FFS; //we don't want do include "windows.h" or "<wx/msw/wrapwin.h>" here, do we?
FileID(DWORD_FFS dwVolumeSN,
DWORD_FFS fileIndexHi,
DWORD_FFS fileIndexLo);
#elif defined FFS_LINUX
FileID(dev_t devId,
ino_t inId);
#endif
private:
#ifdef FFS_WIN
DWORD_FFS dwVolumeSerialNumber;
DWORD_FFS nFileIndexHigh;
DWORD_FFS nFileIndexLow;
#elif defined FFS_LINUX
dev_t deviceId;
ino_t inodeId;
#endif
};
//get unique file id (symbolic link handling: opens the link!!!)
//error condition: returns FileID ()
FileID retrieveFileID(const Zstring& filename);
//test whether two distinct paths point to the same file or directory:
// true: paths point to same files/dirs
// false: error occurred OR point to different files/dirs
bool sameFileSpecified(const Zstring& file1, const Zstring& file2);
}
//---------------Inline Implementation---------------------------------------------------
#ifdef FFS_WIN
inline
util::FileID::FileID() :
dwVolumeSerialNumber(0),
nFileIndexHigh(0),
nFileIndexLow(0) {}
inline
util::FileID::FileID(DWORD_FFS dwVolumeSN,
DWORD_FFS fileIndexHi,
DWORD_FFS fileIndexLo) :
dwVolumeSerialNumber(dwVolumeSN),
nFileIndexHigh(fileIndexHi),
nFileIndexLow(fileIndexLo) {}
inline
bool util::FileID::isNull() const
{
return dwVolumeSerialNumber == 0 &&
nFileIndexHigh == 0 &&
nFileIndexLow == 0;
}
inline
bool util::FileID::operator==(const FileID& rhs) const
{
return dwVolumeSerialNumber == rhs.dwVolumeSerialNumber &&
nFileIndexHigh == rhs.nFileIndexHigh &&
nFileIndexLow == rhs.nFileIndexLow;
}
inline
bool util::FileID::operator<(const FileID& rhs) const
{
if (dwVolumeSerialNumber != rhs.dwVolumeSerialNumber)
return dwVolumeSerialNumber < rhs.dwVolumeSerialNumber;
if (nFileIndexHigh != rhs.nFileIndexHigh)
return nFileIndexHigh < rhs.nFileIndexHigh;
return nFileIndexLow < rhs.nFileIndexLow;
}
inline
util::FileID::FileID(wxInputStream& stream) //read
{
stream.Read(&dwVolumeSerialNumber, sizeof(dwVolumeSerialNumber));
stream.Read(&nFileIndexHigh, sizeof(nFileIndexHigh));
stream.Read(&nFileIndexLow, sizeof(nFileIndexLow));
}
inline
void util::FileID::toStream(wxOutputStream& stream) const //write
{
stream.Write(&dwVolumeSerialNumber, sizeof(dwVolumeSerialNumber));
stream.Write(&nFileIndexHigh, sizeof(nFileIndexHigh));
stream.Write(&nFileIndexLow, sizeof(nFileIndexLow));
}
#elif defined FFS_LINUX
inline
util::FileID::FileID() :
deviceId(0),
inodeId(0) {}
inline
util::FileID::FileID(dev_t devId,
ino_t inId) :
deviceId(devId),
inodeId(inId) {}
inline
bool util::FileID::isNull() const
{
return deviceId == 0 &&
inodeId == 0;
}
inline
bool util::FileID::operator==(const FileID& rhs) const
{
return deviceId == rhs.deviceId &&
inodeId == rhs.inodeId;
}
inline
bool util::FileID::operator<(const FileID& rhs) const
{
if (deviceId != rhs.deviceId)
return deviceId < rhs.deviceId;
return inodeId < rhs.inodeId;
}
inline
util::FileID::FileID(wxInputStream& stream) //read
{
stream.Read(&deviceId, sizeof(deviceId));
stream.Read(&inodeId, sizeof(inodeId));
}
inline
void util::FileID::toStream(wxOutputStream& stream) const //write
{
stream.Write(&deviceId, sizeof(deviceId));
stream.Write(&inodeId, sizeof(inodeId));
}
#endif
inline
bool util::FileID::operator!=(const FileID& rhs) const
{
return !(*this == rhs);
}
#endif // FILEID_H_INCLUDED
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