barrier/lib/base/XBase.h

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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 General Public License for more details.
*/
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#ifndef XBASE_H
#define XBASE_H
#include "CString.h"
#include "stdpre.h"
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#include <exception>
#include "stdpost.h"
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//! Exception base class
/*!
This is the base class of most exception types.
*/
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class XBase : public std::exception {
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public:
//! Use getWhat() as the result of what()
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XBase();
//! Use \c msg as the result of what()
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XBase(const CString& msg);
virtual ~XBase();
// std::exception overrides
virtual const char* what() const;
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protected:
//! Get a human readable string describing the exception
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virtual CString getWhat() const throw() = 0;
//! Format a string
/*!
Looks up a message format using \c id, using \c defaultFormat if
no format can be found, then replaces positional parameters in
the format string and returns the result.
*/
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virtual CString format(const char* id,
const char* defaultFormat, ...) const throw();
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private:
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mutable CString m_what;
};
//! Mix-in for handling \c errno
/*!
This mix-in class for exception classes provides storage and query of
\c errno.
*/
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class MXErrno {
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public:
//! Save \c errno as the error code
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MXErrno();
//! Save \c err as the error code
MXErrno(int err);
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//! @name accessors
//@{
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//! Get the error code
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int getErrno() const;
//! Get the human readable string for the error code
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const char* getErrstr() const;
//@}
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private:
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int m_errno;
};
#endif