Exception.h

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// -*- C++ -*-
/* GG is a GUI for SDL and OpenGL.
   Copyright (C) 2003 T. Zachary Laine

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License
   as published by the Free Software Foundation; either version 2.1
   of the License, or (at your option) any later version.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
    
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA

   If you do not wish to comply with the terms of the LGPL please
   contact the author as other terms are available for a fee.
    
   Zach Laine
   whatwasthataddress@hotmail.com */
   
#ifndef _GG_Exception_h_
#define _GG_Exception_h_

#ifndef GG_API
# ifdef _MSC_VER
#  define WIN32_LEAN_AND_MEAN
#  include <windows.h>
#  undef min
#  undef max
#  ifdef GIGI_EXPORTS
#   define GG_API __declspec(dllexport)
#  else
#   define GG_API __declspec(dllimport)
#  endif
# else
#  define GG_API
# endif
#endif

#include <stdexcept>
#include <string>


namespace GG {

class GG_API ExceptionBase : public std::exception
{
public:
    ExceptionBase() throw() {}                                      
    ExceptionBase(const std::string& msg) throw() : m_msg(msg) {}   
    ~ExceptionBase() throw() {}                                     

    virtual const char* type() const throw() = 0;                   
    virtual const char* what() const throw() {return m_msg.c_str();}

private:
    std::string m_msg; 
};

#define GG_EXCEPTION( name )                                            \
    class GG_API name : public ExceptionBase                            \
    {                                                                   \
    public:                                                             \
        name () throw() : ExceptionBase() {}                            \
        name (const std::string& msg) throw() : ExceptionBase(msg) {}   \
        virtual const char* type() const throw()                        \
            {return "GG::" # name ;}                                    \
    };

#define GG_ABSTRACT_EXCEPTION( name )                                   \
    class GG_API name : public ExceptionBase                            \
    {                                                                   \
    public:                                                             \
        name () throw() : ExceptionBase() {}                            \
        name (const std::string& msg) throw() : ExceptionBase(msg) {}   \
        virtual const char* type() const throw() = 0;                   \
    };

#define GG_CONCRETE_EXCEPTION( name, class_name, superclass )           \
    class GG_API name : public superclass                               \
    {                                                                   \
    public:                                                             \
        name () throw() : superclass () {}                              \
        name (const std::string& msg) throw() : superclass (msg) {}     \
        virtual const char* type() const throw()                        \
            {return # class_name "::" # name ;}                         \
    };

} // namespace GG

#endif // _GG_Enum_h_

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