console_logger.h

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#ifndef CONSOLE_LOGGER_CLASS
#define CONSOLE_LOGGER_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : console_logger                                                    *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2000-$now By Author.  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 is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
 
#include "standard_log_base.h"
 
#include <basis/astring.h>
#include <basis/contracts.h>
#include <basis/enhance_cpp.h>
 
namespace loggers {
 
class console_logger : public virtual standard_log_base
{
public:
  enum stream_choices { TO_STDOUT, TO_STDERR };  
 
  console_logger(stream_choices log_target = TO_STDOUT);
 
  virtual ~console_logger();
 
  DEFINE_CLASS_NAME("console_logger");
 
  bool to_standard_output() const { return c_target == TO_STDOUT; }
 
  bool to_standard_error() const { return c_target == TO_STDERR; }
 
  void set_output(stream_choices target) { c_target = target; }
 
  virtual basis::outcome log(const basis::base_string &info, int filter);
 
private:
  stream_choices c_target;   
};
 
 
#define SETUP_CONSOLE_LOGGER { \
  loggers::standard_log_base *old_log = loggers::program_wide_logger::set \
      (new loggers::console_logger); \
  /* assumes we are good to entirely remove the old logger. */ \
  WHACK(old_log); \
}
 
} // namespace.
 
#endif