171 lines
6.4 KiB
C++
Executable File
171 lines
6.4 KiB
C++
Executable File
/*
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* ebusd - daemon for communication with eBUS heating systems.
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* Copyright (C) 2014-2018 John Baier <ebusd@ebusd.eu>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIB_UTILS_LOG_H_
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#define LIB_UTILS_LOG_H_
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namespace ebusd {
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/** \file lib/utils/log.h */
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/** the available log facilities. */
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enum LogFacility {
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lf_main = 0, //!< main loop
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lf_network, //!< network related
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lf_bus, //!< eBUS related
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lf_update, //!< updates found while listening to the bus
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lf_other, //!< all other log facilities
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lf_COUNT = 5 //!< number of available log facilities
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};
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/** macro for all log facilities. */
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#define LF_ALL ((1 << lf_main) | (1 << lf_network) | (1 << lf_bus) | (1 << lf_update) | (1 << lf_other))
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/** the available log levels. */
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enum LogLevel {
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ll_none = 0, //!< no level at all
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ll_error, //!< error message
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ll_notice, //!< important message
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ll_info, //!< informational message
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ll_debug, //!< debugging message (normally suppressed)
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ll_COUNT = 5 //!< number of available log levels
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};
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/**
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* Parse the log facility from the string.
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* @param facility the string to parse the singular facility from.
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* @return the @a LogFacility, or @a lf_COUNT on error.
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*/
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LogFacility parseLogFacility(const char* facility);
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/**
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* Parse the log facilities from the string.
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* @param facilities the string to parse the list of facilities from (separated by comma).
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* @return the @a LogFacility list as bit mask (1 << facility), or -1 on error.
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*/
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int parseLogFacilities(const char* facilities);
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/**
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* Get the log facility as string.
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* @param facility the @a LogFacility.
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* @return the log facility as string.
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*/
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const char* getLogFacilityStr(LogFacility facility);
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/**
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* Parse the log level from the string.
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* @param level the level as string.
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* @return the @a LogLevel, or @a ll_COUNT on error.
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*/
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LogLevel parseLogLevel(const char* level);
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/**
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* Get the log level as string.
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* @param level the @a LogLevel.
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* @return the log level as string.
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*/
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const char* getLogLevelStr(LogLevel level);
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/**
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* Set the log level for the specified facilities.
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* @param facilities the log facilities as bit mask (1 << facility).
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* @param level the @a LogLevel to set.
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* @return true when a level was changed for a facility, false when no level was changed at all.
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*/
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bool setFacilitiesLogLevel(int facilities, LogLevel level);
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/**
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* Get the log level for the specified facility.
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* @param facility the @a LogFacility.
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* @return the @a LogLevel.
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*/
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LogLevel getFacilityLogLevel(LogFacility facility);
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/**
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* Set the log file to use.
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* @param filename the name of the log file to use, or the empty string for syslog.
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* @return true on success, false on error.
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*/
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bool setLogFile(const char* filename);
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/**
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* Close the log file if necessary.
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*/
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void closeLogFile();
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/**
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* Return whether logging is needed for the specified facility and level.
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* @param facility the @a LogFacility of the message to check.
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* @param level the @a LogLevel of the message to check.
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* @return true when logging is needed for the specified facility and level.
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*/
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bool needsLog(const LogFacility facility, const LogLevel level);
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/**
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* Log the message for the specified @a LogFacility and @a LogLevel (even if logging is not needed for the facility/level).
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* @param facility the @a LogFacility of the message to log.
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* @param level the @a LogLevel of the message to log.
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* @param message the message to log.
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* @param ... variable arguments depending on the @a message.
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*/
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void logWrite(const LogFacility facility, const LogLevel level, const char* message, ...);
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/**
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* Log the message for the specified facility name @a LogLevel (even if logging is not needed for the facility/level).
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* @param facility the facility name of the message to log.
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* @param level the @a LogLevel of the message to log.
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* @param message the message to log.
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* @param ... variable arguments depending on the @a message.
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*/
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void logWrite(const char* facility, const LogLevel level, const char* message, ...);
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/** A macro that calls the logging function only if needed. */
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#define LOG(facility, level, ...) (needsLog(facility, level) ? logWrite(facility, level, __VA_ARGS__) : void(0))
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/** A macro for an error message that calls the logging function only if needed. */
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#define logError(facility, ...) (needsLog(facility, ll_error) ? logWrite(facility, ll_error, __VA_ARGS__) : void(0))
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/** A macro for a notice message that calls the logging function only if needed. */
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#define logNotice(facility, ...) (needsLog(facility, ll_notice) ? logWrite(facility, ll_notice, __VA_ARGS__) : void(0))
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/** A macro for an info message that calls the logging function only if needed. */
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#define logInfo(facility, ...) (needsLog(facility, ll_info) ? logWrite(facility, ll_info, __VA_ARGS__) : void(0))
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/** A macro for a debug message that calls the logging function only if needed. */
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#define logDebug(facility, ...) (needsLog(facility, ll_debug) ? logWrite(facility, ll_debug, __VA_ARGS__) : void(0))
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/** A macro for an error message that calls the logging function only if needed. */
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#define logOtherError(facility, ...) \
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(needsLog(lf_other, ll_error) ? logWrite(facility, ll_error, __VA_ARGS__) : void(0))
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/** A macro for a notice message that calls the logging function only if needed. */
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#define logOtherNotice(facility, ...) \
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(needsLog(lf_other, ll_notice) ? logWrite(facility, ll_notice, __VA_ARGS__) : void(0))
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/** A macro for an info message that calls the logging function only if needed. */
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#define logOtherInfo(facility, ...) \
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(needsLog(lf_other, ll_info) ? logWrite(facility, ll_info, __VA_ARGS__) : void(0))
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/** A macro for a debug message that calls the logging function only if needed. */
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#define logOtherDebug(facility, ...) \
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(needsLog(lf_other, ll_debug) ? logWrite(facility, ll_debug, __VA_ARGS__) : void(0))
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} // namespace ebusd
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#endif // LIB_UTILS_LOG_H_
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