root/morphix/trunk/cloop/advancecomp-1.9_create_compressed_fs/except.h

/*
 * This file is part of the Advance project.
 *
 * Copyright (C) 2002 Andrea Mazzoleni
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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. 
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __EXCEPT_H
#define __EXCEPT_H

#include <string>
#include <iostream>
#include <sstream>

class error {
        std::string function;
        std::string file;
        unsigned line;
        std::string desc;
        bool ignore;
public:
        error() : line(0), ignore(false)
        {
        }

        error(bool Aignore) : line(0), ignore(Aignore)
        {
        }

        error(const char* Afunction, const char* Afile, unsigned Aline) : function(Afunction), file(Afile), line(Aline), ignore(false)
        {
        }

        const std::string& desc_get() const
        {
                return desc;
        }

        const std::string& function_get() const
        {
                return function;
        }

        const std::string& file_get() const
        {
                return file;
        }

        unsigned line_get() const
        {
                return line;
        }

        bool ignore_get() const
        {
                return ignore;
        }

        error& operator<<(const char* A)
        {
                desc += A;
                return *this;
        }

        error& operator<<(const std::string& A)
        {
                desc += A;
                return *this;
        }

        error& operator<<(const unsigned A)
        {
                std::ostringstream s;
                s << A;
                desc += s.str();
                return *this;
        }

};

class error_ignore : public error {
public:
        error_ignore() : error(true)
        {
        }
};

#ifndef NDEBUG
#define error_trace() \
        error(__PRETTY_FUNCTION__,__FILE__,__LINE__)
#else
#define error_trace() \
        error()
#endif

static inline std::ostream& operator<<(std::ostream& os, const error& e)
{
        os << e.desc_get();

        if (e.function_get().length() || e.file_get().length() || e.line_get())
                os << " [at " << e.function_get() << ":" << e.file_get() << ":" << e.line_get() << "]";

        return os;
}

#endif