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/*
* Copyright (c) 2015-2018 Nitrokey UG
*
* This file is part of libnitrokey.
*
* libnitrokey is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* libnitrokey is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libnitrokey. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-3.0
*/
#ifndef LOG_H
#define LOG_H
#include <string>
#include <cstddef>
#include <functional>
namespace nitrokey {
namespace log {
//for MSVC
#ifdef ERROR
#undef ERROR
#endif
enum class Loglevel : int {
ERROR,
WARNING,
INFO,
DEBUG_L1,
DEBUG,
DEBUG_L2
};
class LogHandler {
public:
virtual void print(const std::string &, Loglevel lvl) = 0;
protected:
std::string loglevel_to_str(Loglevel);
std::string format_message_to_string(const std::string &str, const Loglevel &lvl);
};
class StdlogHandler : public LogHandler {
public:
virtual void print(const std::string &, Loglevel lvl);
};
class FunctionalLogHandler : public LogHandler {
using log_function_type = std::function<void(std::string)>;
log_function_type log_function;
public:
FunctionalLogHandler(log_function_type _log_function);
virtual void print(const std::string &, Loglevel lvl);
};
extern StdlogHandler stdlog_handler;
class Log {
public:
Log() : mp_loghandler(&stdlog_handler), m_loglevel(Loglevel::WARNING) {}
static Log &instance() {
if (mp_instance == nullptr) mp_instance = new Log;
return *mp_instance;
}
void operator()(const std::string &, Loglevel);
void set_loglevel(Loglevel lvl) { m_loglevel = lvl; }
void set_handler(LogHandler *handler) { mp_loghandler = handler; }
private:
LogHandler *mp_loghandler;
Loglevel m_loglevel;
static Log *mp_instance;
};
}
}
#ifdef NO_LOG
#define LOG(string, level) while(false){}
#define LOGD(string) while(false){}
#else
#define LOG(string, level) nitrokey::log::Log::instance()((string), (level))
#define LOGD1(string) nitrokey::log::Log::instance()((string), (nitrokey::log::Loglevel::DEBUG_L1))
#define LOGD(string) nitrokey::log::Log::instance()((string), (nitrokey::log::Loglevel::DEBUG_L2))
#endif
#endif
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