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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
//---------------------------------------------------------
// This include should be moved to commons but even as it is,
// it wont cause a linker circular dependency since it's just
// a header.
#include "utils/StringUtils.h"
//---------------------------------------------------------
#include <stdarg.h>
#ifdef __GNUC__
// The 'this' pointer counts as a parameter on member methods.
#define XBMCCOMMONS_ATTRIB_EXCEPTION_FORMAT __attribute__((format(printf,2,3)))
#else
#define XBMCCOMMONS_ATTRIB_EXCEPTION_FORMAT
#endif
#define XBMCCOMMONS_COPYVARARGS(fmt) va_list argList; va_start(argList, fmt); Set(fmt, argList); va_end(argList)
#define XBMCCOMMONS_STANDARD_EXCEPTION(E) \
class E : public XbmcCommons::Exception \
{ \
public: \
inline E(const char* message,...) XBMCCOMMONS_ATTRIB_EXCEPTION_FORMAT : Exception(#E) { XBMCCOMMONS_COPYVARARGS(message); } \
\
inline E(const E& other) : Exception(other) {} \
}
namespace XbmcCommons
{
/**
* This class a superclass for exceptions that want to utilize some
* utility functionality including autologging with the specific
* exception name.
*/
class Exception
{
private:
std::string classname;
std::string message;
protected:
inline explicit Exception(const char* classname_) : classname(classname_) { }
inline Exception(const char* classname_, const char* message_) : classname(classname_), message(message_) { }
inline Exception(const Exception& other) = default;
/**
* This method is called from the constructor of subclasses. It
* will set the message from varargs as well as call log message
*/
inline void Set(const char* fmt, va_list& argList)
{
message = StringUtils::FormatV(fmt, argList);
}
/**
* This message can be called from the constructor of subclasses.
* It will set the message and log the throwing.
*/
inline void SetMessage(const char* fmt, ...) XBMCCOMMONS_ATTRIB_EXCEPTION_FORMAT
{
// calls 'set'
XBMCCOMMONS_COPYVARARGS(fmt);
}
inline void setClassname(const char* cn) { classname = cn; }
public:
virtual ~Exception();
virtual void LogThrowMessage(const char* prefix = NULL) const;
inline virtual const char* GetExMessage() const { return message.c_str(); }
};
/**
* This class forms the base class for unchecked exceptions. Unchecked exceptions
* are those that really shouldn't be handled explicitly. For example, on windows
* when a access violation is converted to a win32_exception, there's nothing
* that can be done in most code. The outer most stack frame might try to
* do some error logging prior to shutting down, but that's really it.
*/
XBMCCOMMONS_STANDARD_EXCEPTION(UncheckedException);
/**
* In cases where you catch(...){} you will (may) inadvertently be
* catching UncheckedException's. Therefore this macro will allow
* you to do something equivalent to:
* catch (anything except UncheckedException) {}
*
* In order to avoid catching UncheckedException, use the macro as follows:
*
* try { ... }
* XBMCCOMMONS_HANDLE_UNCHECKED
* catch(...){ ... }
*/
// Yes. I recognize that the name of this macro is an oxymoron.
#define XBMCCOMMONS_HANDLE_UNCHECKED \
catch (const XbmcCommons::UncheckedException& ) { throw; } \
catch (const XbmcCommons::UncheckedException* ) { throw; }
}
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