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StringIntern.h

/*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
* 
* Distributable under the terms of either the Apache License (Version 2.0) or 
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/
#ifndef _lucene_util_StringIntern_H
#define _lucene_util_StringIntern_H

#if defined(_LUCENE_PRAGMA_ONCE)
# pragma once
#endif

#include "VoidMap.h"
CL_NS_DEF(util)
typedef CL_NS(util)::CLHashMap<const TCHAR*,int,CL_NS(util)::Compare::TChar,CL_NS(util)::Equals::TChar,CL_NS(util)::Deletor::tcArray, CL_NS(util)::Deletor::DummyInt32 > __wcsintrntype;
typedef CL_NS(util)::CLHashMap<const char*,int,CL_NS(util)::Compare::Char,CL_NS(util)::Equals::Char,CL_NS(util)::Deletor::acArray, CL_NS(util)::Deletor::DummyInt32 > __strintrntype;

  /** Functions for intern'ing strings. This
  * is a process of pooling strings thus using less memory,
  * and furthermore allows intern'd strings to be directly
  * compared:
  * string1==string2, rather than _tcscmp(string1,string2)
  */
00025   class CLStringIntern{
        static __wcsintrntype stringPool;
        static __strintrntype stringaPool;
        STATIC_DEFINE_MUTEX(THIS_LOCK)
  public:
      /** 
      * Internalise the specified string.
      * \return Returns a pointer to the internalised string
      */
      static const char* internA(const char* str CL_FILELINEPARAM);
      /** 
      * Uninternalise the specified string. Decreases
      * the reference count and frees the string if 
      * reference count is zero
      * \returns true if string was destroyed, otherwise false
      */
      static bool uninternA(const char* str);

      /** 
      * Internalise the specified string.
      * \return Returns a pointer to the internalised string
      */
      static const TCHAR* intern(const TCHAR* str CL_FILELINEPARAM);
      
      /** 
      * Uninternalise the specified string. Decreases
      * the reference count and frees the string if 
      * reference count is zero
      * \returns true if string was destroyed, otherwise false
      */
      static bool unintern(const TCHAR* str);

    static void shutdown();
  };

CL_NS_END
#endif

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