rainmeter-studio/Library/Logger.h
2013-05-29 22:08:51 +03:00

110 lines
3.4 KiB
C++

/*
Copyright (C) 2013 Birunthan Mohanathas
This program 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 2
of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef RM_LOGGER_H_
#define RM_LOGGER_H_
#include <Windows.h>
#include <string>
#include <list>
// Singleton class to handle and store log messages and control the log file.
class CLogger
{
public:
enum class Level
{
Error = 1,
Warning = 2,
Notice = 3,
Debug = 4
};
struct Entry
{
Level level;
std::wstring timestamp;
std::wstring message;
};
static CLogger& GetInstance();
void SetLogFilePath(std::wstring path) { m_LogFilePath = path; }
void StartLogFile();
void StopLogFile();
void DeleteLogFile();
bool IsLogToFile() { return m_LogToFile; }
void SetLogToFile(bool logToFile);
void Log(Level level, const WCHAR* msg);
void LogF(Level level, const WCHAR* format, ...);
// Convenience functions.
static void Error(const WCHAR* msg) { GetInstance().Log(Level::Error, msg); }
static void Warning(const WCHAR* msg) { GetInstance().Log(Level::Warning, msg); }
static void Notice(const WCHAR* msg) { GetInstance().Log(Level::Notice, msg); }
static void Debug(const WCHAR* msg) { GetInstance().Log(Level::Debug, msg); }
// TODO: Uncomment when VS supports variadic templates.
/*
template<typename... Args>
static void ErrorF(const WCHAR* format, Args... args) { GetInstance().LogF(Level::Error, args...); }
template<typename... Args>
static void WarningF(const WCHAR* format, Args... args) { GetInstance().LogF(Level::Warning, args...); }
template<typename... Args>
static void NoticeF(const WCHAR* format, Args... args) { GetInstance().LogF(Level::Notice, args...); }
template<typename... Args>
static void DebugF(const WCHAR* format, Args... args) { GetInstance().LogF(Level::Debug, args...); }
*/
const std::wstring& GetLogFilePath() { return m_LogFilePath; }
const std::list<Entry>& GetEntries() { return m_Entries; }
private:
void LogInternal(Level level, ULONGLONG timestamp, const WCHAR* msg);
// Appends |entry| to the log file.
void WriteToLogFile(Entry& entry);
CLogger();
~CLogger();
bool m_LogToFile;
std::wstring m_LogFilePath;
std::list<Entry> m_Entries;
CRITICAL_SECTION m_CsLog;
CRITICAL_SECTION m_CsLogDelay;
};
// FIXME: Temporary solution until VS support variadic macros.
#define RM_LOGGER_LOGF_HELPER(name, format, ...) \
CLogger::GetInstance().LogF(CLogger::Level::name, format, __VA_ARGS__);
#define CLogger_ErrorF(format, ...) RM_LOGGER_LOGF_HELPER(Error, format, __VA_ARGS__)
#define CLogger_WarningF(format, ...) RM_LOGGER_LOGF_HELPER(Warning, format, __VA_ARGS__)
#define CLogger_NoticeF(format, ...) RM_LOGGER_LOGF_HELPER(Notice, format, __VA_ARGS__)
#define CLogger_DebugF(format, ...) RM_LOGGER_LOGF_HELPER(Debug, format, __VA_ARGS__)
#endif