// -*- coding: utf-8 -*-
// Time-stamp: <array2di.hpp   4 nov 2016 08:32:57>

// Implementation of 2d m×n arrays with an array for each line

#ifndef ARRAY2DI_H
#define ARRAY2DI_H

class Array2di {
public:
  // Constructors
  // Default constructor with no allocation
  Array2di() : nlin(0), ncol(0), p(nullptr) {};
  // Constructor from dimensions
  Array2di(int m, int n);
  // Constructeur de copie
  Array2di(const Array2di& a);
  // Assignment operator
  Array2di& operator=(const Array2di& a);
  // Access operator to a non-constant array
  double& operator()(int i, int j);
  // Access operator to a constant array
  const double& operator()(int i, int j) const;
  // Destructor
  ~Array2di() { free(); }
private:
  // Alloc the array
  // + nlin and ncol must be valid
  void alloc();
  // Free the array
  void free();
  // Copy from another array
  void copy(double** t);
  int nlin;			// Number of lines
  int ncol;			// Number of columns
  // Array of pointers
  // Each p[i] contains a pointer to the array for line i.
  double** p;
};
#endif