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-/*
- Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
- Her Majesty the Queen in Right of Canada (Communications Research
- Center Canada)
-
- Copyright (C) 2018
- Matthias P. Braendli, matthias.braendli@mpb.li
-
- http://www.opendigitalradio.org
- */
-/*
- This file is part of ODR-DabMux.
-
- ODR-DabMux 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 3 of the
- License, or (at your option) any later version.
-
- ODR-DabMux 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 General Public License
- along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <syslog.h>
-#include <cstdarg>
-#include <cstdio>
-#include <fstream>
-#include <sstream>
-#include <iostream>
-#include <list>
-#include <stdexcept>
-#include <string>
-#include <mutex>
-#include <memory>
-
-#define SYSLOG_IDENT "ODR-DabMux"
-#define SYSLOG_FACILITY LOG_LOCAL0
-
-enum log_level_t {debug = 0, info, warn, error, alert, emerg, discard};
-
-static const std::string levels_as_str[] =
- { " ", " ", "WARN ", "ERROR", "ALERT", "EMERG", "-----"} ;
-
-/** Abstract class all backends must inherit from */
-class LogBackend {
- public:
- virtual ~LogBackend() {};
- virtual void log(log_level_t level, const std::string& message) = 0;
- virtual std::string get_name() const = 0;
-};
-
-/** A Logging backend for Syslog */
-class LogToSyslog : public LogBackend {
- public:
- LogToSyslog() : name("SYSLOG") {
- openlog(SYSLOG_IDENT, LOG_PID, SYSLOG_FACILITY);
- }
-
- virtual ~LogToSyslog() {
- closelog();
- }
-
- void log(log_level_t level, const std::string& message);
-
- std::string get_name() const { return name; }
-
- private:
- const std::string name;
-
- LogToSyslog(const LogToSyslog& other) = delete;
- const LogToSyslog& operator=(const LogToSyslog& other) = delete;
-};
-
-class LogToFile : public LogBackend {
- public:
- LogToFile(const std::string& filename);
- void log(log_level_t level, const std::string& message);
- std::string get_name() const { return name; }
-
- private:
- const std::string name;
-
- struct FILEDeleter{ void operator()(FILE* fd){ if(fd) fclose(fd);}};
- std::unique_ptr<FILE, FILEDeleter> log_file;
-
- LogToFile(const LogToFile& other) = delete;
- const LogToFile& operator=(const LogToFile& other) = delete;
-};
-
-class LogLine;
-
-class Logger {
- public:
- void register_backend(std::shared_ptr<LogBackend> backend);
-
- /* Log the message to all backends */
- void log(log_level_t level, const char* fmt, ...);
-
- void logstr(log_level_t level, std::string&& message);
-
- /* Return a LogLine for the given level
- * so that you can write etiLog.level(info) << "stuff = " << 21 */
- LogLine level(log_level_t level);
-
- private:
- std::list<std::shared_ptr<LogBackend> > backends;
-
- std::mutex m_cerr_mutex;
-};
-
-extern Logger etiLog;
-
-// Accumulate a line of logs, using same syntax as stringstream
-// The line is logged when the LogLine gets destroyed
-class LogLine {
- public:
- LogLine(const LogLine& logline);
- const LogLine& operator=(const LogLine& other) = delete;
- LogLine(Logger* logger, log_level_t level) :
- logger_(logger)
- {
- level_ = level;
- }
-
- // Push the new element into the stringstream
- template <typename T>
- LogLine& operator<<(T s) {
- if (level_ != discard) {
- os << s;
- }
- return *this;
- }
-
- ~LogLine()
- {
- if (level_ != discard) {
- logger_->logstr(level_, os.str());
- }
- }
-
- private:
- std::ostringstream os;
- log_level_t level_;
- Logger* logger_;
-};
-
-