// Copyright (C) 2008-2012 National ICT Australia (NICTA)
// 
// 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/.
// -------------------------------------------------------------------
// 
// Written by Conrad Sanderson - http://conradsanderson.id.au


//! \addtogroup podarray
//! @{



struct podarray_prealloc_n_elem
  {
  static const uword val = 16;
  };



//! A lightweight array for POD types. For internal use only!
template<typename eT>
class podarray
  {
  public:
  
  arma_aligned const uword n_elem; //!< number of elements held
  arma_aligned       eT*   mem;    //!< pointer to memory used by the object
  
  
  protected:
  //! internal memory, to avoid calling the 'new' operator for small amounts of memory.
  arma_align_mem eT mem_local[ podarray_prealloc_n_elem::val ];
  
  
  public:
  
  inline ~podarray();
  inline  podarray();
  
  inline                 podarray (const podarray& x);
  inline const podarray& operator=(const podarray& x);
  
  arma_inline explicit podarray(const uword new_N);
  
  arma_inline explicit podarray(const eT* X, const uword new_N);
  
  template<typename T1>
  inline explicit podarray(const Proxy<T1>& P);
  
  arma_inline eT& operator[] (const uword i);
  arma_inline eT  operator[] (const uword i) const;
  
  arma_inline eT& operator() (const uword i);
  arma_inline eT  operator() (const uword i) const;
  
  inline void set_min_size(const uword min_n_elem);
  
  inline void set_size(const uword new_n_elem);
  inline void reset();
  
  
  inline void fill(const eT val);
  
  inline void zeros();
  inline void zeros(const uword new_n_elem);
  
  arma_inline       eT* memptr();
  arma_inline const eT* memptr() const;
  
  arma_hot inline void copy_row(const Mat<eT>& A, const uword row);
  
  
  protected:
  
  inline void init_cold(const uword new_n_elem);
  inline void init_warm(const uword new_n_elem);
  };



//! @}