/*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Data Differential YATL (i.e. libtest)  library
 *
 *  Copyright (C) 2012-2013 Data Differential, http://datadifferential.com/
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 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *      * Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
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 *      * Redistributions in binary form must reproduce the above
 *  copyright notice, this list of conditions and the following disclaimer
 *  in the documentation and/or other materials provided with the
 *  distribution.
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 *      * The names of its contributors may not be used to endorse or
 *  promote products derived from this software without specific prior
 *  written permission.
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 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#pragma once

namespace libtest {

class exception : public std::exception
{
public:
  exception(const char *file, int line, const char *func);

  exception( const exception& );

  exception& operator=(const exception&) = delete;

  virtual ~exception() throw();

  virtual const char* what() const throw()
  {
    if (_error_message)
    {
      return _error_message;
    }

    return "";
  }

  void what(size_t, const char*);

  size_t length() const
  {
    return _error_message_size;
  }

  int line() const
  {
    return _line;
  }

  const char* file() const
  {
    return _file;
  }

  const char* func() const
  {
    return _func;
  }

protected:
  void init(va_list);

private:
  int _line;
  const char*  _file;
  const char* _func;
  char* _error_message;
  size_t _error_message_size;
};

} // namespace libtest