autoarray.h

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/*
 *  Copyright (C) 2000-2001  The Exult Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <exception>
#include <string>

#include "exult_types.h"

template<class T>
class autoarray
  {
private:
  std::size_t size_;
  T *data_;
public:
#ifdef HAVE_NO_EXCEPTIONS
  inline static range_error(const std::string& what_arg) {
    std::cerr << "Range Error: " << what_arg << std::endl;
#ifdef DEBUG
    *((int *)(0)) = 0;
#else
    std::exit(-1);
#endif
  }
#else
  class range_error : public std::exception
    {
    std::string what_;
    public:
     range_error (const std::string& what_arg): what_ (what_arg) { }
     const char *what(void) const throw () { return what_.c_str(); }
     virtual ~range_error() throw () { }
    };
#endif
  autoarray() : size_(0), data_(0) 
    {  }
  autoarray(std::size_t n) : size_(n),data_(n?new T[n]:0)
    {  }
#ifdef HAVE_NO_EXCEPTIONS
  T &operator[](sint32 i)
#else
  T &operator[](sint32 i)  throw(range_error)
#endif
    {
    if(i>=(sint32)size_ || i < 0)
      throw range_error("out of bounds");
    if(data_)
      return data_[i];
    throw range_error("no data");
    }
  ~autoarray()
    {
    if(data_)
      delete [] data_;
    }
  autoarray(const autoarray &a) : size_(0),data_(0)
    {
    if(a.data_)
      {
      data_=new T[a.size_];
      memcpy(data_,a.data_,a.size_);
      size_=a.size_;
      }
    }
  autoarray &operator=(const autoarray &a)
    {
    if(data_)
      {
      delete [] data_;
      size_=0;
      }
    if(a.data_)
      {
      data_=new T[a.size_];
      memcpy(data_,a.data_,a.size_);
      size_=a.size_;
      }
    return *this;
    }
  void set_size(std::size_t new_size)
    {
    if(data_)
      {
      delete [] data_;
      }
    data_=new T[new_size];
    size_=new_size;
    }
  };

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