intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 228 insertions, 0 deletions

diff --git a/contrib/libs/poco/Foundation/include/Poco/HashMap.h b/contrib/libs/poco/Foundation/include/Poco/HashMap.h
new file mode 100644
index 0000000000..5153f2b164
--- /dev/null
+++ b/contrib/libs/poco/Foundation/include/Poco/HashMap.h
@@ -0,0 +1,228 @@
+//
+// HashMap.h
+//
+// Library: Foundation
+// Package: Hashing
+// Module:  HashMap
+//
+// Definition of the HashMap class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_HashMap_INCLUDED
+#define Foundation_HashMap_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include "Poco/LinearHashTable.h"
+#include "Poco/Exception.h"
+#include <utility>
+
+
+namespace Poco {
+
+
+template <class Key, class Value>
+struct HashMapEntry
+	/// This class template is used internally by HashMap.
+{
+	Key   first;
+	Value second;
+	
+	HashMapEntry():
+		first(),
+		second()
+	{
+	}
+	
+	HashMapEntry(const Key& key):
+		first(key),
+		second()
+	{
+	}
+
+	HashMapEntry(const Key& key, const Value& value):
+		first(key),
+		second(value)
+	{
+	}
+	
+	bool operator == (const HashMapEntry& entry) const
+	{
+		return first == entry.first;
+	}
+
+	bool operator != (const HashMapEntry& entry) const
+	{
+		return first != entry.first;
+	}
+};
+
+
+template <class HME, class KeyHashFunc>
+struct HashMapEntryHash
+	/// This class template is used internally by HashMap.
+{
+	std::size_t operator () (const HME& entry) const
+	{
+		return _func(entry.first);
+	}
+
+private:
+	KeyHashFunc _func;
+};
+
+
+template <class Key, class Mapped, class HashFunc = Hash<Key> >
+class HashMap
+	/// This class implements a map using a LinearHashTable.
+	///
+	/// A HashMap can be used just like a std::map.
+{
+public:
+	typedef Key                 KeyType;
+	typedef Mapped              MappedType;
+	typedef Mapped&             Reference;
+	typedef const Mapped&       ConstReference;
+	typedef Mapped*             Pointer;
+	typedef const Mapped*       ConstPointer;
+	
+	typedef HashMapEntry<Key, Mapped>      ValueType;
+	typedef std::pair<KeyType, MappedType> PairType;
+	
+	typedef HashMapEntryHash<ValueType, HashFunc> HashType;
+	typedef LinearHashTable<ValueType, HashType>  HashTable;
+	
+	typedef typename HashTable::Iterator      Iterator;
+	typedef typename HashTable::ConstIterator ConstIterator;
+	
+	HashMap()
+		/// Creates an empty HashMap.
+	{
+	}
+	
+	HashMap(std::size_t initialReserve):
+		_table(initialReserve)
+		/// Creates the HashMap with room for initialReserve entries.
+	{
+	}
+	
+	HashMap& operator = (const HashMap& map)
+		/// Assigns another HashMap.
+	{
+		HashMap tmp(map);
+		swap(tmp);
+		return *this;
+	}
+	
+	void swap(HashMap& map)
+		/// Swaps the HashMap with another one.
+	{
+		_table.swap(map._table);
+	}
+	
+	ConstIterator begin() const
+	{
+		return _table.begin();
+	}
+	
+	ConstIterator end() const
+	{
+		return _table.end();
+	}
+	
+	Iterator begin()
+	{
+		return _table.begin();
+	}
+	
+	Iterator end()
+	{
+		return _table.end();
+	}
+	
+	ConstIterator find(const KeyType& key) const
+	{
+		ValueType value(key);
+		return _table.find(value);
+	}
+
+	Iterator find(const KeyType& key)
+	{
+		ValueType value(key);
+		return _table.find(value);
+	}
+
+	std::size_t count(const KeyType& key) const
+	{
+		ValueType value(key);
+		return _table.find(value) != _table.end() ? 1 : 0;
+	}
+
+	std::pair<Iterator, bool> insert(const PairType& pair)
+	{
+		ValueType value(pair.first, pair.second);
+		return _table.insert(value);
+	}
+
+	std::pair<Iterator, bool> insert(const ValueType& value)
+	{
+		return _table.insert(value);
+	}
+	
+	void erase(Iterator it)
+	{
+		_table.erase(it);
+	}
+	
+	void erase(const KeyType& key)
+	{
+		Iterator it = find(key);
+		_table.erase(it);
+	}
+	
+	void clear()
+	{
+		_table.clear();
+	}
+
+	std::size_t size() const
+	{
+		return _table.size();
+	}
+
+	bool empty() const
+	{
+		return _table.empty();
+	}
+
+	ConstReference operator [] (const KeyType& key) const
+	{
+		ConstIterator it = _table.find(key);
+		if (it != _table.end())
+			return it->second;
+		else
+			throw NotFoundException();
+	}
+
+	Reference operator [] (const KeyType& key)
+	{
+		ValueType value(key);
+		std::pair<Iterator, bool> res = _table.insert(value);
+		return res.first->second;
+	}
+
+private:
+	HashTable _table;
+};
+
+
+} // namespace Poco
+
+
+#endif // Foundation_HashMap_INCLUDED