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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002-2012, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
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///////////////////////////////////////////////////////////////////////////
#ifndef INCLUDED_IEXBASEEXC_H
#define INCLUDED_IEXBASEEXC_H
#include "IexNamespace.h"
#include "IexExport.h"
//----------------------------------------------------------
//
// A general exception base class, and a few
// useful exceptions derived from the base class.
//
//----------------------------------------------------------
#include <string>
#include <exception>
#include <sstream>
IEX_INTERNAL_NAMESPACE_HEADER_ENTER
//-------------------------------
// Our most basic exception class
//-------------------------------
class BaseExc: public std::string, public std::exception
{
public:
//----------------------------
// Constructors and destructor
//----------------------------
IEX_EXPORT BaseExc (const char *s = 0) throw(); // std::string (s)
IEX_EXPORT BaseExc (const std::string &s) throw(); // std::string (s)
IEX_EXPORT BaseExc (std::stringstream &s) throw(); // std::string (s.str())
IEX_EXPORT BaseExc (const BaseExc &be) throw();
IEX_EXPORT virtual ~BaseExc () throw ();
//--------------------------------------------
// what() method -- e.what() returns e.c_str()
//--------------------------------------------
IEX_EXPORT virtual const char * what () const throw ();
//--------------------------------------------------
// Convenient methods to change the exception's text
//--------------------------------------------------
IEX_EXPORT BaseExc & assign (std::stringstream &s); // assign (s.str())
IEX_EXPORT BaseExc & operator = (std::stringstream &s);
IEX_EXPORT BaseExc & append (std::stringstream &s); // append (s.str())
IEX_EXPORT BaseExc & operator += (std::stringstream &s);
//--------------------------------------------------
// These methods from the base class get obscured by
// the definitions above.
//--------------------------------------------------
IEX_EXPORT BaseExc & assign (const char *s);
IEX_EXPORT BaseExc & operator = (const char *s);
IEX_EXPORT BaseExc & append (const char *s);
IEX_EXPORT BaseExc & operator += (const char *s);
//--------------------------------------------------
// Stack trace for the point at which the exception
// was thrown. The stack trace will be an empty
// string unless a working stack-tracing routine
// has been installed (see below, setStackTracer()).
//--------------------------------------------------
IEX_EXPORT const std::string & stackTrace () const;
private:
std::string _stackTrace;
};
//-----------------------------------------------------
// A macro to save typing when declararing an exception
// class derived directly or indirectly from BaseExc:
//-----------------------------------------------------
#define DEFINE_EXC_EXP(exp, name, base) \
class exp name: public base \
{ \
public: \
name() throw(): base (0) {} \
name (const char* text) throw(): base (text) {} \
name (const std::string &text) throw(): base (text) {} \
name (std::stringstream &text) throw(): base (text) {} \
~name() throw() { } \
};
// For backward compatibility.
#define DEFINE_EXC(name, base) DEFINE_EXC_EXP(, name, base)
//--------------------------------------------------------
// Some exceptions which should be useful in most programs
//--------------------------------------------------------
DEFINE_EXC_EXP (IEX_EXPORT, ArgExc, BaseExc) // Invalid arguments to a function call
DEFINE_EXC_EXP (IEX_EXPORT, LogicExc, BaseExc) // General error in a program's logic,
// for example, a function was called
// in a context where the call does
// not make sense.
DEFINE_EXC_EXP (IEX_EXPORT, InputExc, BaseExc) // Invalid input data, e.g. from a file
DEFINE_EXC_EXP (IEX_EXPORT, IoExc, BaseExc) // Input or output operation failed
DEFINE_EXC_EXP (IEX_EXPORT, MathExc, BaseExc) // Arithmetic exception; more specific
// exceptions derived from this class
// are defined in ExcMath.h
DEFINE_EXC_EXP (IEX_EXPORT, ErrnoExc, BaseExc) // Base class for exceptions corresponding
// to errno values (see errno.h); more
// specific exceptions derived from this
// class are defined in ExcErrno.h
DEFINE_EXC_EXP (IEX_EXPORT, NoImplExc, BaseExc) // Missing method exception e.g. from a
// call to a method that is only partially
// or not at all implemented. A reminder
// to lazy software people to get back
// to work.
DEFINE_EXC_EXP (IEX_EXPORT, NullExc, BaseExc) // A pointer is inappropriately null.
DEFINE_EXC_EXP (IEX_EXPORT, TypeExc, BaseExc) // An object is an inappropriate type,
// i.e. a dynamnic_cast failed.
//----------------------------------------------------------------------
// Stack-tracing support:
//
// setStackTracer(st)
//
// installs a stack-tracing routine, st, which will be called from
// class BaseExc's constructor every time an exception derived from
// BaseExc is thrown. The stack-tracing routine should return a
// string that contains a printable representation of the program's
// current call stack. This string will be stored in the BaseExc
// object; the string is accesible via the BaseExc::stackTrace()
// method.
//
// setStackTracer(0)
//
// removes the current stack tracing routine. When an exception
// derived from BaseExc is thrown, the stack trace string stored
// in the BaseExc object will be empty.
//
// stackTracer()
//
// returns a pointer to the current stack-tracing routine, or 0
// if there is no current stack stack-tracing routine.
//
//----------------------------------------------------------------------
typedef std::string (* StackTracer) ();
IEX_EXPORT void setStackTracer (StackTracer stackTracer);
IEX_EXPORT StackTracer stackTracer ();
//-----------------
// Inline functions
//-----------------
inline BaseExc &
BaseExc::operator = (std::stringstream &s)
{
return assign (s);
}
inline BaseExc &
BaseExc::operator += (std::stringstream &s)
{
return append (s);
}
inline BaseExc &
BaseExc::assign (const char *s)
{
std::string::assign(s);
return *this;
}
inline BaseExc &
BaseExc::operator = (const char *s)
{
return assign(s);
}
inline BaseExc &
BaseExc::append (const char *s)
{
std::string::append(s);
return *this;
}
inline BaseExc &
BaseExc::operator += (const char *s)
{
return append(s);
}
inline const std::string &
BaseExc::stackTrace () const
{
return _stackTrace;
}
IEX_INTERNAL_NAMESPACE_HEADER_EXIT
#endif // INCLUDED_IEXBASEEXC_H
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