#if !defined (lsode_h)
#define lsode_h 1

#include "c++rocket.h"

extern int model_1(const int& neq, const double& time, 
		   double* z, double* dy, 
		   int& ierr);

extern int model_2(const int& neq, const double& time, 
		   double* z, double* dy, 
		   int& ierr);

extern "C" int lsode_ (int (*)(const int&, const double&,
			       double*, double*, int&),
		       int&, double*, double&, double&, int&,
		       double&, double&, int&, int&, int&,
		       double*, int&, int*, int&,
		       int (*)(const int&, const double&,
			       double*, const int&, const int&,
			       double*, const int&),
		       int&);

typedef int (*ModelFunc_t) (const int&, const double&,
			    double*, double*, int&);
     

class lsode
{
  int memory; // est vrai si la memoire a ete alloue
  // ce sont des variables utilises par lsode_
  int neq;
  int length;
  
  double **dy;
  
  double time;
  double tout;
  int itol;
  double rtol;
  double atol;
  int itask;
  int istate;
  int iopt;
  double *rwork;
  int lrw;
  int *iwork;
  int liw;
  int mf;
  double *state;

  void *md;

  //int (*func)(const int&, const double&, double*, double*, int&)

  void reset();

 public:

  lsode(Model_t model);
  ~lsode();
  void print();
  void set_atol(double tol) { atol = tol; }
  void set_rtol(double tol) { rtol = tol; }
  
  int solve(double *st, double duration, double step);
  
  int get_length(void) { return length; };
  void get_data(double**);
  
  int get_neq(void) { return neq; };
};


typedef enum 
{ 
  SUCCES = 2,
  TOO_MUCH_WORK = -1, 
  TOO_MUCH_ACC = -2, 
  ILLEGAL_INPUT = -3, 
  ERR_FAILURE = -4, 
  CONV_FAILURE = -5, 
  ERROR_WEIGHT = -6, 
  EXIT_IN_FUNCTION = -13 
} State;
 

#endif