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00001 /******************************************************************************** 00002 * * 00003 * A u t o m a t i c P o i n t e r * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 2007,2009 by Jeroen van der Zijp. All Rights Reserved. * 00007 ********************************************************************************* 00008 * This library is free software; you can redistribute it and/or modify * 00009 * it under the terms of the GNU Lesser General Public License as published by * 00010 * the Free Software Foundation; either version 3 of the License, or * 00011 * (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00016 * GNU Lesser General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Lesser General Public License * 00019 * along with this program. If not, see <http://www.gnu.org/licenses/> * 00020 ********************************************************************************* 00021 * $Id: FXAutoPtr.h,v 1.15 2009/01/06 13:07:21 fox Exp $ * 00022 ********************************************************************************/ 00023 #ifndef FXAUTOPTR_H 00024 #define FXAUTOPTR_H 00025 00026 namespace FX { 00027 00028 00029 /// Automatic pointer 00030 template<class EType> class FXAutoPtr { 00031 private: 00032 EType* ptr; 00033 public: 00034 00035 /// Construct with optional pointer 00036 FXAutoPtr(EType* p=NULL):ptr(p){ } 00037 00038 /// Copy constructor from an automatic pointer with compatible type 00039 template<class T> FXAutoPtr(FXAutoPtr<T>& orig):ptr(orig.release()){ } 00040 00041 /// Assign from pointer 00042 FXAutoPtr& operator=(EType *p){ ptr=p; return *this; } 00043 00044 /// Assign from an automatic pointer with compatible type 00045 template<class T> FXAutoPtr& operator=(FXAutoPtr<T>& orig){ reset(orig.release()); return *this; } 00046 00047 /// Conversion operators 00048 operator EType*() const { return ptr; } 00049 00050 /// Dereference operator 00051 EType& operator*() const { return *ptr; } 00052 00053 /// Follow pointer operator 00054 EType* operator->() const { return ptr; } 00055 00056 /// Release hold on the pointer 00057 EType* release(){ EType* tmp=ptr; ptr=NULL; return tmp; } 00058 00059 /// Delete old object, replace by new, if any 00060 void reset(EType* p=NULL){ if(p!=ptr){ delete ptr; ptr=p; } } 00061 00062 /// Destruction deletes pointer 00063 ~FXAutoPtr(){ delete ptr; } 00064 }; 00065 00066 } 00067 00068 #endif 00069
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