autovec.h

00001 
00002 // This code is based on bits/std_memory.h from GCC.
00003 // The copyright and license information from the
00004 // original code is below.
00005 
00006 // Copyright (C) 2001 Free Software Foundation, Inc.
00007 //
00008 // This file is part of the GNU ISO C++ Library.  This library is free
00009 // software; you can redistribute it and/or modify it under the
00010 // terms of the GNU General Public License as published by the
00011 // Free Software Foundation; either version 2, or (at your option)
00012 // any later version.
00013 
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017 // GNU General Public License for more details.
00018 
00019 // You should have received a copy of the GNU General Public License along
00020 // with this library; see the file COPYING.  If not, write to the Free
00021 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00022 // USA.
00023 
00024 // As a special exception, you may use this file as part of a free software
00025 // library without restriction.  Specifically, if other files instantiate
00026 // templates or use macros or inline functions from this file, or you compile
00027 // this file and link it with other files to produce an executable, this
00028 // file does not by itself cause the resulting executable to be covered by
00029 // the GNU General Public License.  This exception does not however
00030 // invalidate any other reasons why the executable file might be covered by
00031 // the GNU General Public License.
00032 
00033 /*
00034  * Copyright (c) 1997-1999
00035  * Silicon Graphics Computer Systems, Inc.
00036  *
00037  * Permission to use, copy, modify, distribute and sell this software
00038  * and its documentation for any purpose is hereby granted without fee,
00039  * provided that the above copyright notice appear in all copies and
00040  * that both that copyright notice and this permission notice appear
00041  * in supporting documentation.  Silicon Graphics makes no
00042  * representations about the suitability of this software for any
00043  * purpose.  It is provided "as is" without express or implied warranty.
00044  *
00045  */
00046 
00047 #ifndef _util_misc_autovec_h
00048 #define _util_misc_autovec_h
00049 
00050 #include <stddef.h>
00051 
00052 namespace sc {
00053 
00057 template <class T>
00058 class auto_vec {
00059     T* d_;
00060   public:
00061     typedef T element_type;
00062 
00066     explicit auto_vec(T*d = 0) throw(): d_(d) {}
00067 
00069     auto_vec(auto_vec &av) throw(): d_(av.release()) {}
00070 
00072     ~auto_vec() throw() { delete[] d_; }
00073 
00075     auto_vec &operator = (auto_vec &av) throw() {
00076       reset(av.release());
00077       return *this;
00078     }
00079 
00081     T* get() const throw() { return d_; }
00082 
00084     T &operator[](size_t i) throw() { return d_[i]; }
00085 
00087     T* release() throw() {
00088       T *r = d_;
00089       d_ = 0;
00090       return r;
00091     }
00092 
00094     void reset(T*d=0) throw() {
00095       if (d != d_) {
00096           delete[] d_;
00097           d_ = d;
00098         }
00099     }
00100       
00101 };
00102 
00103 }
00104 
00105 #endif // _util_misc_autovec_h
00106 

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