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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) ZenJu (zhnmju123 AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef SORTING_H_INCLUDED
#define SORTING_H_INCLUDED
#include <zen/assert_static.h>
#include "../file_hierarchy.h"
#include <zen/type_tools.h>
//#include "../synchronization.h"
namespace zen
{
namespace
{
struct CompileTimeReminder : public FSObjectVisitor
{
virtual void visit(const FileMapping& fileObj) {}
virtual void visit(const SymLinkMapping& linkObj) {}
virtual void visit(const DirMapping& dirObj ) {}
} checkDymanicCasts; //just a compile-time reminder to check dynamic casts in this file
}
inline
bool isDirectoryMapping(const FileSystemObject& fsObj)
{
return dynamic_cast<const DirMapping*>(&fsObj) != nullptr;
}
template <bool ascending, SelectedSide side> inline
bool lessShortFileName(const FileSystemObject& a, const FileSystemObject& b)
{
//presort types: first files, then directories then empty rows
if (a.isEmpty<side>())
return false; //empty rows always last
else if (b.isEmpty<side>())
return true; //empty rows always last
if (isDirectoryMapping(a)) //sort directories by relative name
{
if (isDirectoryMapping(b))
return LessFilename()(a.getRelativeName<side>(), b.getRelativeName<side>());
else
return false;
}
else
{
if (isDirectoryMapping(b))
return true;
else
return makeSortDirection(LessFilename(), Int2Type<ascending>())(a.getShortName<side>(), b.getShortName<side>());
}
}
template <bool ascending> //side currently unused!
bool lessRelativeName(const FileSystemObject& a, const FileSystemObject& b)
{
const bool isDirectoryA = isDirectoryMapping(a);
const Zstring& relDirNameA = isDirectoryA ?
a.getObjRelativeName() : //directory
beforeLast(a.getObjRelativeName(), FILE_NAME_SEPARATOR); //returns empty string if ch not found
const bool isDirectoryB = isDirectoryMapping(b);
const Zstring& relDirNameB = isDirectoryB ?
b.getObjRelativeName() : //directory
beforeLast(b.getObjRelativeName(), FILE_NAME_SEPARATOR); //returns empty string if ch not found
//compare relative names without filenames first
const int rv = cmpFileName(relDirNameA, relDirNameB);
if (rv != 0)
return makeSortDirection(std::less<int>(), Int2Type<ascending>())(rv, 0);
else //compare the filenames
{
if (isDirectoryB) //directories shall appear before files
return false;
else if (isDirectoryA)
return true;
return LessFilename()(a.getObjShortName(), b.getObjShortName());
}
}
template <bool ascending, SelectedSide side> inline
bool lessFilesize(const FileSystemObject& a, const FileSystemObject& b)
{
//empty rows always last
if (a.isEmpty<side>())
return false;
else if (b.isEmpty<side>())
return true;
const bool isDirA = dynamic_cast<const DirMapping*>(&a) != nullptr;
const bool isDirB = dynamic_cast<const DirMapping*>(&b) != nullptr;
//directories second last
if (isDirA)
return false;
else if (isDirB)
return true;
const FileMapping* fileObjA = dynamic_cast<const FileMapping*>(&a);
const FileMapping* fileObjB = dynamic_cast<const FileMapping*>(&b);
//then symlinks
if (!fileObjA)
return false;
else if (!fileObjB)
return true;
//return list beginning with largest files first
return makeSortDirection(std::less<UInt64>(), Int2Type<ascending>())(fileObjA->getFileSize<side>(), fileObjB->getFileSize<side>());
}
template <bool ascending, SelectedSide side> inline
bool lessFiletime(const FileSystemObject& a, const FileSystemObject& b)
{
if (a.isEmpty<side>())
return false; //empty rows always last
else if (b.isEmpty<side>())
return true; //empty rows always last
const FileMapping* fileObjA = dynamic_cast<const FileMapping*>(&a);
const FileMapping* fileObjB = dynamic_cast<const FileMapping*>(&b);
const SymLinkMapping* linkObjA = dynamic_cast<const SymLinkMapping*>(&a);
const SymLinkMapping* linkObjB = dynamic_cast<const SymLinkMapping*>(&b);
if (!fileObjA && !linkObjA)
return false; //directories last
else if (!fileObjB && !linkObjB)
return true; //directories last
zen::Int64 dateA = fileObjA ? fileObjA->getLastWriteTime<side>() : linkObjA->getLastWriteTime<side>();
zen::Int64 dateB = fileObjB ? fileObjB->getLastWriteTime<side>() : linkObjB->getLastWriteTime<side>();
//return list beginning with newest files first
return makeSortDirection(std::less<Int64>(), Int2Type<ascending>())(dateA, dateB);
}
template <bool ascending, SelectedSide side> inline
bool lessExtension(const FileSystemObject& a, const FileSystemObject& b)
{
if (a.isEmpty<side>())
return false; //empty rows always last
else if (b.isEmpty<side>())
return true; //empty rows always last
const FileMapping* fileObjA = dynamic_cast<const FileMapping*>(&a);
const FileMapping* fileObjB = dynamic_cast<const FileMapping*>(&b);
if (!fileObjA)
return false; //directories last
else if (!fileObjB)
return true; //directories last
return makeSortDirection(LessFilename(), Int2Type<ascending>())(fileObjA->getExtension<side>(), fileObjB->getExtension<side>());
}
template <bool ascending> inline
bool lessCmpResult(const FileSystemObject& a, const FileSystemObject& b)
{
//presort result: equal shall appear at end of list
if (a.getCategory() == FILE_EQUAL)
return false;
if (b.getCategory() == FILE_EQUAL)
return true;
return makeSortDirection(std::less<CompareFilesResult>(), Int2Type<ascending>())(a.getCategory(), b.getCategory());
}
template <bool ascending> inline
bool lessSyncDirection(const FileSystemObject& a, const FileSystemObject& b)
{
return makeSortDirection(std::less<SyncOperation>(), Int2Type<ascending>())(a.getSyncOperation(), b.getSyncOperation());
}
}
#endif // SORTING_H_INCLUDED
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