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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef SVL_STRINGPOOL_HXX
#define SVL_STRINGPOOL_HXX
#include "svl/svldllapi.h"
#include "rtl/ustring.hxx"
#include <boost/unordered_map.hpp>
#include <boost/unordered_set.hpp>
class CharClass;
namespace svl {
/**
* Storage for pool of shared strings. It also provides mapping from
* original-cased strings to upper-cased strings for case insensitive
* operations.
*/
class SVL_DLLPUBLIC StringPool
{
typedef boost::unordered_set<OUString, OUStringHash> StrHashType;
typedef std::pair<StrHashType::iterator, bool> InsertResultType;
typedef boost::unordered_map<const rtl_uString*, OUString> StrIdMapType;
StrHashType maStrPool;
StrHashType maStrPoolUpper;
StrIdMapType maToUpperMap;
const CharClass* mpCharClass;
public:
StringPool();
StringPool( const CharClass* pCharClass );
/**
* Intern a string object into the shared string pool.
*
* @param rStr string object to intern.
*
* @return a pointer to the string object stored inside the pool, or NULL
* if the insertion fails.
*/
rtl_uString* intern( const OUString& rStr );
/**
* Get a unique ID of string object that's expected to be in the shared
* string pool. If the string is not in the pool, NULL is returned. The
* ID obtained by this method can be used for case sensitive comparison.
*
* @param rStr string object to get the ID of.
*
* @return unique ID of the string object.
*/
sal_uIntPtr getIdentifier( const OUString& rStr ) const;
/**
* Get a unique ID of string object for case insensitive comparison. The
* string object is expected to be in the pool.
*
* @param rStr string object to get the ID of.
*
* @return unique ID of the string object usable for case insensitive
* comparison.
*/
sal_uIntPtr getIdentifierIgnoreCase( const OUString& rStr ) const;
/**
* Go through all string objects in the pool, and clear those that are no
* longer used outside of the pool.
*/
void purge();
size_t getCount() const;
size_t getCountIgnoreCase() const;
private:
InsertResultType findOrInsert( StrHashType& rPool, const OUString& rStr ) const;
};
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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