// Filename: interrogateFunctionWrapper.h
// Created by:  drose (06Aug00)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#ifndef INTERROGATEFUNCTIONWRAPPER_H
#define INTERROGATEFUNCTIONWRAPPER_H

#include <dtoolbase.h>

#include "interrogateComponent.h"

#include <vector>

class IndexRemapper;

////////////////////////////////////////////////////////////////////
//       Class : InterrogateFunctionWrapper
// Description : An internal representation of a callable function.
////////////////////////////////////////////////////////////////////
class EXPCL_DTOOLCONFIG InterrogateFunctionWrapper : public InterrogateComponent {
public:
  INLINE InterrogateFunctionWrapper(InterrogateModuleDef *def = NULL);
  INLINE InterrogateFunctionWrapper(const InterrogateFunctionWrapper &copy);
  INLINE void operator = (const InterrogateFunctionWrapper &copy);

  INLINE FunctionIndex get_function() const;

  INLINE bool is_callable_by_name() const;

  INLINE bool has_return_value() const;
  INLINE TypeIndex get_return_type() const;
  INLINE bool caller_manages_return_value() const;
  INLINE FunctionIndex get_return_value_destructor() const;

  INLINE int number_of_parameters() const;
  INLINE TypeIndex parameter_get_type(int n) const;
  INLINE bool parameter_has_name(int n) const;
  INLINE const string &parameter_get_name(int n) const;
  INLINE bool parameter_is_this(int n) const;

  INLINE const string &get_unique_name() const;

  void output(ostream &out) const;
  void input(istream &in);

  void remap_indices(const IndexRemapper &remap);

private:
  enum Flags {
    F_caller_manages   = 0x0001,
    F_has_return       = 0x0002,
    F_callable_by_name = 0x0004
  };

  enum ParameterFlags {
    PF_has_name       = 0x0001,
    PF_is_this        = 0x0002,
  };

  int _flags;
  FunctionIndex _function;
  TypeIndex _return_type;
  FunctionIndex _return_value_destructor;
  string _unique_name;

public:
  // This nested class must be declared public just so we can declare
  // the external ostream and istream I/O operator functions, on the
  // SGI compiler.  Arguably a compiler bug, but what can you do.
  class Parameter {
  public:
    void output(ostream &out) const;
    void input(istream &in);

    int _parameter_flags;
    TypeIndex _type;
    string _name;
  };

private:
  typedef vector<Parameter> Parameters;
  Parameters _parameters;

  friend class InterrogateBuilder;
  friend class FunctionRemap;
};

INLINE ostream &operator << (ostream &out, const InterrogateFunctionWrapper &wrapper);
INLINE istream &operator >> (istream &in, InterrogateFunctionWrapper &wrapper);

INLINE ostream &operator << (ostream &out, const InterrogateFunctionWrapper::Parameter &p);
INLINE istream &operator >> (istream &in, InterrogateFunctionWrapper::Parameter &p);

#include "interrogateFunctionWrapper.I"

#endif