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/*
* Copyright (C) 2007-2011 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_EXCEPTION_BASE_H
#define BU_EXCEPTION_BASE_H
#include <exception>
#include <stdarg.h>
// This shouldn't normally be defined here, I don't think it's all that portable
// and it also changes the class interface, we should find out how much of
// an issue that is, we could just put in an empty getBacktrace() function for
// when you don't have support for it...
namespace Bu
{
/**
* A generalized Exception base class. This is nice for making general and
* flexible child classes that can create new error code classes.
*
* In order to create your own exception class use these two lines.
*
* in your header: subExceptionDecl( NewClassName );
*
* in your source: subExcpetienDef( NewClassName );
*/
class ExceptionBase : public std::exception
{
public:
/**
* Construct an exception with an error code of zero, but with a
* description. The use of this is not reccomended most of the time,
* it's generally best to include an error code with the exception so
* your program can handle the exception in a better way.
* @param sFormat The format of the text. See printf for more info.
*/
ExceptionBase( const char *sFormat, ... ) throw();
/**
*
* @param nCode
* @param sFormat
*/
ExceptionBase( int nCode, const char *sFormat, ... ) throw();
/**
*
* @param nCode
* @return
*/
ExceptionBase( int nCode=0 ) throw();
ExceptionBase( const ExceptionBase &e ) throw ();
/**
*
* @return
*/
virtual ~ExceptionBase() throw();
/**
*
* @return
*/
virtual const char *what() const throw();
/**
*
* @return
*/
int getErrorCode();
/**
*
* @param lpFormat
* @param vargs
*/
void setWhat( const char *lpFormat, va_list &vargs );
/**
*
* @param lpText
*/
void setWhat( const char *lpText );
private:
int nErrorCode; /**< The code for the error that occured. */
char *sWhat; /**< The text string telling people what went wrong. */
};
}
#define subExceptionDecl( name ) \
class name : public Bu::ExceptionBase \
{ \
public: \
name( const char *sFormat, ... ) throw (); \
name( int nCode, const char *sFormat, ... ) throw(); \
name( int nCode=0 ) throw (); \
name( const name &e ) throw (); \
};
#define subExceptionDeclChild( name, parent ) \
class name : public parent \
{ \
public: \
name( const char *sFormat, ... ) throw (); \
name( int nCode, const char *sFormat, ... ) throw(); \
name( int nCode=0 ) throw (); \
name( const name &e ) throw (); \
};
#define subExceptionDeclBegin( name ) \
class name : public Bu::ExceptionBase \
{ \
public: \
name( const char *sFormat, ... ) throw (); \
name( int nCode, const char *sFormat, ... ) throw(); \
name( int nCode=0 ) throw (); \
name( const name &e ) throw ();
#define subExceptionDeclEnd() \
};
#define subExceptionDef( name ) \
name::name( const char *lpFormat, ... ) throw() : \
ExceptionBase( 0 ) \
{ \
va_list ap; \
va_start( ap, lpFormat ); \
setWhat( lpFormat, ap ); \
va_end( ap ); \
} \
name::name( int nCode, const char *lpFormat, ... ) throw() : \
ExceptionBase( nCode ) \
{ \
va_list ap; \
va_start( ap, lpFormat ); \
setWhat( lpFormat, ap ); \
va_end( ap ); \
} \
name::name( int nCode ) throw() : \
ExceptionBase( nCode ) \
{ \
} \
name::name( const name &e ) throw() : \
ExceptionBase( e ) \
{ \
}
#define subExceptionDefChild( name, parent ) \
name::name( const char *lpFormat, ... ) throw() : \
parent( 0 ) \
{ \
va_list ap; \
va_start( ap, lpFormat ); \
setWhat( lpFormat, ap ); \
va_end( ap ); \
} \
name::name( int nCode, const char *lpFormat, ... ) throw() : \
parent( nCode ) \
{ \
va_list ap; \
va_start( ap, lpFormat ); \
setWhat( lpFormat, ap ); \
va_end( ap ); \
} \
name::name( int nCode ) throw() : \
parent( nCode ) \
{ \
} \
name::name( const name &e ) throw() : \
ExceptionBase( e ) \
{ \
}
namespace Bu
{
// Exceptions that are so general they could be used anywhere go here.
class UnsupportedException : public Bu::ExceptionBase
{
public:
UnsupportedException() throw ();
};
}
#endif
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