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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>
#include <iomanip>

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

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

      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;
      }

      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 /* << " (" << std::hex << A << "h)" */ ;
            desc += s.str();
            return *this;
      }
};

class error_invalid : public error {
public:
      error_invalid() : error()
      {
      }

      error_invalid& operator<<(const char* A)
      {
            error::operator<<(A);
            return *this;
      }

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

      error_invalid& operator<<(const unsigned A)
      {
            error::operator<<(A);
            return *this;
      }
};

class error_unsupported : public error {
public:
      error_unsupported() : error()
      {
      }

      error_unsupported& operator<<(const char* A)
      {
            error::operator<<(A);
            return *this;
      }

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

      error_unsupported& operator<<(const unsigned A)
      {
            error::operator<<(A);
            return *this;
      }
};

#define error() \
      error(__PRETTY_FUNCTION__, __FILE__, __LINE__)

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


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