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/*************************************************************************
   Copyright (C) 2004, 2006 International Business Machines and others.
   All Rights Reserved.
   This code is published under the Common Public License.
 
   $Id: IpStdCInterface.h 822 2006-12-19 01:24:42Z andreasw $
 
   Authors:  Carl Laird, Andreas Waechter     IBM    2004-09-02
 *************************************************************************/

#ifndef __IPSTDCINTERFACE_H__
#define __IPSTDCINTERFACE_H__

#ifdef __cplusplus
extern "C"
{
#endif

  typedef double Number;

  typedef int Index;

  typedef int Int;

  /* This includes the SolverReturn enum type */
#include "IpReturnCodes.h"

  struct IpoptProblemInfo;

  typedef struct IpoptProblemInfo* IpoptProblem;

  typedef int Bool;
#ifndef TRUE
# define TRUE (1)
#endif
#ifndef FALSE
# define FALSE (0)
#endif

  typedef void * UserDataPtr;

  typedef Bool (*Eval_F_CB)(Index n, Number* x, Bool new_x,
                            Number* obj_value, UserDataPtr user_data);

  typedef Bool (*Eval_Grad_F_CB)(Index n, Number* x, Bool new_x,
                                 Number* grad_f, UserDataPtr user_data);

  typedef Bool (*Eval_G_CB)(Index n, Number* x, Bool new_x,
                            Index m, Number* g, UserDataPtr user_data);

  typedef Bool (*Eval_Jac_G_CB)(Index n, Number *x, Bool new_x,
                                Index m, Index nele_jac,
                                Index *iRow, Index *jCol, Number *values,
                                UserDataPtr user_data);

  typedef Bool (*Eval_H_CB)(Index n, Number *x, Bool new_x, Number obj_factor,
                            Index m, Number *lambda, Bool new_lambda,
                            Index nele_hess, Index *iRow, Index *jCol,
                            Number *values, UserDataPtr user_data);

  IpoptProblem CreateIpoptProblem(
      Index n             
    , Number* x_L         
    , Number* x_U         
    , Index m             
    , Number* g_L         
    , Number* g_U         
    , Index nele_jac      
    , Index nele_hess     
    , Index index_style   
    , Eval_F_CB eval_f    
    , Eval_G_CB eval_g    
    , Eval_Grad_F_CB eval_grad_f
    , Eval_Jac_G_CB eval_jac_g
    , Eval_H_CB eval_h    
  );

  void FreeIpoptProblem(IpoptProblem ipopt_problem);


  Bool AddIpoptStrOption(IpoptProblem ipopt_problem, char* keyword, char* val);

  Bool AddIpoptNumOption(IpoptProblem ipopt_problem, char* keyword, Number val);

  Bool AddIpoptIntOption(IpoptProblem ipopt_problem, char* keyword, Int val);

  Bool OpenIpoptOutputFile(IpoptProblem ipopt_problem, char* file_name,
                           Int print_level);

  Bool SetIpoptProblemScaling(IpoptProblem ipopt_problem,
                              Number obj_scaling,
                              Number* x_scaling,
                              Number* g_scaling);

  enum ApplicationReturnStatus IpoptSolve(
      IpoptProblem ipopt_problem
    , Number* x          
    , Number* g          
    , Number* obj_val    
    , Number* mult_g     
    , Number* mult_x_L   
    , Number* mult_x_U   
    , UserDataPtr user_data
  );

#ifdef __cplusplus
} /* extern "C" { */
#endif

#endif

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