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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 (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef PARALLEL_SCAN_H_INCLUDED
#define PARALLEL_SCAN_H_INCLUDED
#include <map>
#include <set>
#include "hard_filter.h"
#include "../structures.h"
#include "../file_hierarchy.h"
namespace zen
{
struct DirectoryKey
{
DirectoryKey(const Zstring& dirnameFull,
const HardFilter::FilterRef& filter,
SymLinkHandling handleSymlinks) :
dirnameFull_(dirnameFull),
filter_(filter),
handleSymlinks_(handleSymlinks) {}
Zstring dirnameFull_;
HardFilter::FilterRef filter_; //filter interface: always bound by design!
SymLinkHandling handleSymlinks_;
};
inline
bool operator<(const DirectoryKey& lhs, const DirectoryKey& rhs)
{
if (lhs.handleSymlinks_ != rhs.handleSymlinks_)
return lhs.handleSymlinks_ < rhs.handleSymlinks_;
if (!EqualFilename()(lhs.dirnameFull_, rhs.dirnameFull_))
return LessFilename()(lhs.dirnameFull_, rhs.dirnameFull_);
return *lhs.filter_ < *rhs.filter_;
}
struct DirectoryValue
{
DirContainer dirCont;
std::set<Zstring> failedReads; //relative postfixed names of directories that could not be read completely (empty string for root), e.g. access denied, or temporal network drop
};
class FillBufferCallback
{
public:
virtual ~FillBufferCallback() {}
enum HandleError
{
ON_ERROR_RETRY,
ON_ERROR_IGNORE
};
virtual HandleError reportError (const std::wstring& msg) = 0; //may throw!
virtual void reportStatus(const std::wstring& msg, int itemsTotal) = 0; //
};
//attention: ensure directory filtering is applied later to exclude filtered directories which have been kept as parent folders
void fillBuffer(const std::set<DirectoryKey>& keysToRead, //in
std::map<DirectoryKey, DirectoryValue>& buf, //out
FillBufferCallback& callback,
size_t updateInterval); //unit: [ms]
}
#endif // PARALLEL_SCAN_H_INCLUDED
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