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99 lines
2.1 KiB
C++
99 lines
2.1 KiB
C++
//
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// RecursiveDirectoryIteratorImpl.h
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//
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// Library: Foundation
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// Package: Filesystem
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// Module: RecursiveDirectoryIterator
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//
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// Definition of the RecursiveDirectoryIteratorImpl class.
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_RecursiveDirectoryIteratorImpl_INCLUDED
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#define Foundation_RecursiveDirectoryIteratorImpl_INCLUDED
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#include <functional>
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#include <stack>
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#include "Poco/DirectoryIteratorStrategy.h"
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#include "Poco/Foundation.h"
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namespace Poco
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{
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class ChildrenFirstTraverse;
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class SiblingsFirstTraverse;
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template <class TTraverseStrategy = ChildrenFirstTraverse>
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class RecursiveDirectoryIteratorImpl
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{
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public:
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enum
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{
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D_INFINITE = 0 /// Special value for infinite traverse depth.
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};
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RecursiveDirectoryIteratorImpl(const std::string & path, UInt16 maxDepth = D_INFINITE)
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: _maxDepth(maxDepth), _traverseStrategy(std::ptr_fun(depthFun), _maxDepth), _isFinished(false), _rc(1)
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{
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_itStack.push(DirectoryIterator(path));
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_current = _itStack.top()->path();
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}
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~RecursiveDirectoryIteratorImpl() { }
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inline void duplicate() { ++_rc; }
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inline void release()
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{
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if (--_rc == 0)
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delete this;
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}
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inline UInt16 depth() const { return depthFun(_itStack); }
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inline UInt16 maxDepth() const { return _maxDepth; }
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inline const std::string & get() const { return _current; }
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const std::string & next()
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{
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if (_isFinished)
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return _current;
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_current = _traverseStrategy.next(&_itStack, &_isFinished);
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return _current;
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}
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private:
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typedef std::stack<DirectoryIterator> Stack;
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static UInt16 depthFun(const Stack & stack)
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/// Function which implements the logic of determining
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/// recursion depth.
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{
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return static_cast<Poco::UInt16>(stack.size());
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}
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UInt16 _maxDepth;
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TTraverseStrategy _traverseStrategy;
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bool _isFinished;
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Stack _itStack;
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std::string _current;
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int _rc;
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};
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} // namespace Poco
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#endif // Foundation_RecursiveDirectoryIteratorImpl_INCLUDED
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