elxlog.h

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/*=========================================================================
 *
 *  Copyright UMC Utrecht and contributors
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef elxlog_h
#define elxlog_h
 
#include <cstdint> // For uint8_t.
#include <string>
#include <sstream>
 
namespace elastix
{
class log
{
public:
  enum class level : std::uint8_t
  {
    info,
    warn,
    err,
    off
  };
 
  static bool
  setup(const std::string & log_filename,
        const bool          do_log_to_file,
        const bool          do_log_to_stdout,
        const level         log_level = {});
 
  class guard
  {
  public:
    guard();
 
    guard(const std::string & log_filename,
          const bool          do_log_to_file,
          const bool          do_log_to_stdout,
          const level         log_level);
 
    ~guard();
  };
 
 
  static void
  info(const std::string & message);
  static void
  warn(const std::string & message);
  static void
  error(const std::string & message);
 
 
  static void
  info(const std::ostream & stream);
  static void
  warn(const std::ostream & stream);
  static void
  error(const std::ostream & stream);
 
 
  static void
  info_to_log_file(const std::string & message);
 
  static void
  info_to_log_file(const std::ostream & stream);
 
 
  static void
  to_stdout(const std::string & message);
 
  static void
  to_stdout(const std::ostream & stream);
};
 
} // end namespace elastix
 
#endif