program_wide_logger.h

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#ifndef PROGRAM_WIDE_LOGGER_FACILITY
#define PROGRAM_WIDE_LOGGER_FACILITY
 
/*****************************************************************************\
*                                                                             *
*  Name   : program_wide_logger facility                                      *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1992-$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 "logging_macros.h"
  // it seems reasonable to provide the logging macros to any file that is also using
  // the program-wide logger.
 
#include <basis/contracts.h>
#include <basis/definitions.h>
#include <loggers/standard_log_base.h>
 
namespace loggers {
 
 
class program_wide_logger
{
public:
  static loggers::standard_log_base &get();
 
  static loggers::standard_log_base *set(loggers::standard_log_base *new_log);
 
private:
  static loggers::standard_log_base *c_the_wide_log;  
};
 
 
 
class null_logger : public virtual standard_log_base
{
public:
  virtual ~null_logger() {}
  DEFINE_CLASS_NAME("null_logger");
  virtual basis::outcome log(const basis::base_string &formal(info), int formal(filter)) {
    /* if (filter || !(&info)) {} */
    return basis::common::OKAY;
  }
};
 
} //namespace.
 
#endif // outer guard.