Log.hpp

/* Copyright (c) 2013 David Sichau <mail"at"sichau"dot"eu>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#ifndef UTILIB_LOG_HPP_
#define UTILIB_LOG_HPP_

#include <time.h>
#include <iostream>
#include <memory>
#include <sstream>
#include <string>

namespace UtilLib {
enum LogLevel {
    logERROR,  // !< logERROR
    logWARNING,  // !< logWARNING
    logINFO,   // !< logINFO
    logDEBUG,  // !< logDEBUG
    logDEBUG1,  // !< logDEBUG1
    logDEBUG2,  // !< logDEBUG2
    logDEBUG3,  // !< logDEBUG3
    logDEBUG4   // !< logDEBUG4
};

class Log {
 public:
    Log() = default;
    Log(const Log&) = delete;
    Log& operator =(const Log&) = delete;

    virtual ~Log();

    std::ostringstream& writeReport(LogLevel level = logINFO);

    static std::shared_ptr<std::ostream> getStream();

    static void setStream(std::shared_ptr<std::ostream> pStream);

    static LogLevel getReportingLevel();

    static void setReportingLevel(LogLevel level);

 private:
    static void writeOutput(const std::string& msg);

    static LogLevel reportingLevel_;

    static std::shared_ptr<std::ostream> pStream_;
    std::ostringstream buffer_;
};
}  /* end namespace */

#define LOG(level) \
    if (level > UtilLib::Log::getReportingLevel() || !UtilLib::Log::getStream()) ; \
    else UtilLib::Log().writeReport(level)



#endif /* UTILIB_LOG_HPP_ */