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easylogging++.h
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//
// Bismillah ar-Rahmaan ar-Raheem
//
// Easylogging++ v9.95.3
// Single-header only, cross-platform logging library for C++ applications
//
// Copyright (c) 2017 muflihun.com
//
// This library is released under the MIT Licence.
// http://labs.muflihun.com/easyloggingpp/licence.php
//
// https://github.com/muflihun/easyloggingpp
// https://muflihun.github.io/easyloggingpp
// http://muflihun.com
//
#ifndef EASYLOGGINGPP_H
#define EASYLOGGINGPP_H
// Compilers and C++0x/C++11 Evaluation
#if __cplusplus >= 201103L
# define ELPP_CXX11 1
#endif // __cplusplus >= 201103L
#if (defined(__GNUC__))
# define ELPP_COMPILER_GCC 1
#else
# define ELPP_COMPILER_GCC 0
#endif
#if ELPP_COMPILER_GCC
# define ELPP_GCC_VERSION (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100 \
+ __GNUC_PATCHLEVEL__)
# if defined(__GXX_EXPERIMENTAL_CXX0X__)
# define ELPP_CXX0X 1
# endif
#endif
// Visual C++
#if defined(_MSC_VER)
# define ELPP_COMPILER_MSVC 1
#else
# define ELPP_COMPILER_MSVC 0
#endif
#define ELPP_CRT_DBG_WARNINGS ELPP_COMPILER_MSVC
#if ELPP_COMPILER_MSVC
# if (_MSC_VER == 1600)
# define ELPP_CXX0X 1
# elif(_MSC_VER >= 1700)
# define ELPP_CXX11 1
# endif
#endif
// Clang++
#if (defined(__clang__) && (__clang__ == 1))
# define ELPP_COMPILER_CLANG 1
#else
# define ELPP_COMPILER_CLANG 0
#endif
#if ELPP_COMPILER_CLANG
# if __has_include(<thread>)
# include <cstddef> // Make __GLIBCXX__ defined when using libstdc++
# if !defined(__GLIBCXX__) || __GLIBCXX__ >= 20150426
# define ELPP_CLANG_SUPPORTS_THREAD
# endif // !defined(__GLIBCXX__) || __GLIBCXX__ >= 20150426
# endif // __has_include(<thread>)
#endif
#if (defined(__MINGW32__) || defined(__MINGW64__))
# define ELPP_MINGW 1
#else
# define ELPP_MINGW 0
#endif
#if (defined(__CYGWIN__) && (__CYGWIN__ == 1))
# define ELPP_CYGWIN 1
#else
# define ELPP_CYGWIN 0
#endif
#if (defined(__INTEL_COMPILER))
# define ELPP_COMPILER_INTEL 1
#else
# define ELPP_COMPILER_INTEL 0
#endif
// Operating System Evaluation
// Windows
#if (defined(_WIN32) || defined(_WIN64))
# define ELPP_OS_WINDOWS 1
#else
# define ELPP_OS_WINDOWS 0
#endif
// Linux
#if (defined(__linux) || defined(__linux__))
# define ELPP_OS_LINUX 1
#else
# define ELPP_OS_LINUX 0
#endif
#if (defined(__APPLE__))
# define ELPP_OS_MAC 1
#else
# define ELPP_OS_MAC 0
#endif
#if (defined(__FreeBSD__) || defined(__FreeBSD_kernel__))
# define ELPP_OS_FREEBSD 1
#else
# define ELPP_OS_FREEBSD 0
#endif
#if (defined(__sun))
# define ELPP_OS_SOLARIS 1
#else
# define ELPP_OS_SOLARIS 0
#endif
#if (defined(_AIX))
# define ELPP_OS_AIX 1
#else
# define ELPP_OS_AIX 0
#endif
#if (defined(__NetBSD__))
# define ELPP_OS_NETBSD 1
#else
# define ELPP_OS_NETBSD 0
#endif
// Unix
#if ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_NETBSD || ELPP_OS_SOLARIS || ELPP_OS_AIX) && (!ELPP_OS_WINDOWS))
# define ELPP_OS_UNIX 1
#else
# define ELPP_OS_UNIX 0
#endif
#if (defined(__ANDROID__))
# define ELPP_OS_ANDROID 1
#else
# define ELPP_OS_ANDROID 0
#endif
// Evaluating Cygwin as *nix OS
#if !ELPP_OS_UNIX && !ELPP_OS_WINDOWS && ELPP_CYGWIN
# undef ELPP_OS_UNIX
# undef ELPP_OS_LINUX
# define ELPP_OS_UNIX 1
# define ELPP_OS_LINUX 1
#endif // !ELPP_OS_UNIX && !ELPP_OS_WINDOWS && ELPP_CYGWIN
#if !defined(ELPP_INTERNAL_DEBUGGING_OUT_INFO)
# define ELPP_INTERNAL_DEBUGGING_OUT_INFO std::cout
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
#if !defined(ELPP_INTERNAL_DEBUGGING_OUT_ERROR)
# define ELPP_INTERNAL_DEBUGGING_OUT_ERROR std::cerr
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
#if !defined(ELPP_INTERNAL_DEBUGGING_ENDL)
# define ELPP_INTERNAL_DEBUGGING_ENDL std::endl
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
#if !defined(ELPP_INTERNAL_DEBUGGING_MSG)
# define ELPP_INTERNAL_DEBUGGING_MSG(msg) msg
#endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
// Internal Assertions and errors
#if !defined(ELPP_DISABLE_ASSERT)
# if (defined(ELPP_DEBUG_ASSERT_FAILURE))
# define ELPP_ASSERT(expr, msg) if (!(expr)) { \
std::stringstream internalInfoStream; internalInfoStream << msg; \
ELPP_INTERNAL_DEBUGGING_OUT_ERROR \
<< "EASYLOGGING++ ASSERTION FAILED (LINE: " << __LINE__ << ") [" #expr << "] WITH MESSAGE \"" \
<< ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << "\"" << ELPP_INTERNAL_DEBUGGING_ENDL; base::utils::abort(1, \
"ELPP Assertion failure, please define ELPP_DEBUG_ASSERT_FAILURE"); }
# else
# define ELPP_ASSERT(expr, msg) if (!(expr)) { \
std::stringstream internalInfoStream; internalInfoStream << msg; \
ELPP_INTERNAL_DEBUGGING_OUT_ERROR\
<< "ASSERTION FAILURE FROM EASYLOGGING++ (LINE: " \
<< __LINE__ << ") [" #expr << "] WITH MESSAGE \"" << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << "\"" \
<< ELPP_INTERNAL_DEBUGGING_ENDL; }
# endif // (defined(ELPP_DEBUG_ASSERT_FAILURE))
#else
# define ELPP_ASSERT(x, y)
#endif //(!defined(ELPP_DISABLE_ASSERT)
#if ELPP_COMPILER_MSVC
# define ELPP_INTERNAL_DEBUGGING_WRITE_PERROR \
{ char buff[256]; strerror_s(buff, 256, errno); \
ELPP_INTERNAL_DEBUGGING_OUT_ERROR << ": " << buff << " [" << errno << "]";} (void)0
#else
# define ELPP_INTERNAL_DEBUGGING_WRITE_PERROR \
ELPP_INTERNAL_DEBUGGING_OUT_ERROR << ": " << strerror(errno) << " [" << errno << "]"; (void)0
#endif // ELPP_COMPILER_MSVC
#if defined(ELPP_DEBUG_ERRORS)
# if !defined(ELPP_INTERNAL_ERROR)
# define ELPP_INTERNAL_ERROR(msg, pe) { \
std::stringstream internalInfoStream; internalInfoStream << "<ERROR> " << msg; \
ELPP_INTERNAL_DEBUGGING_OUT_ERROR \
<< "ERROR FROM EASYLOGGING++ (LINE: " << __LINE__ << ") " \
<< ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << ELPP_INTERNAL_DEBUGGING_ENDL; \
if (pe) { ELPP_INTERNAL_DEBUGGING_OUT_ERROR << " "; ELPP_INTERNAL_DEBUGGING_WRITE_PERROR; }} (void)0
# endif
#else
# undef ELPP_INTERNAL_INFO
# define ELPP_INTERNAL_ERROR(msg, pe)
#endif // defined(ELPP_DEBUG_ERRORS)
#if (defined(ELPP_DEBUG_INFO))
# if !(defined(ELPP_INTERNAL_INFO_LEVEL))
# define ELPP_INTERNAL_INFO_LEVEL 9
# endif // !(defined(ELPP_INTERNAL_INFO_LEVEL))
# if !defined(ELPP_INTERNAL_INFO)
# define ELPP_INTERNAL_INFO(lvl, msg) { if (lvl <= ELPP_INTERNAL_INFO_LEVEL) { \
std::stringstream internalInfoStream; internalInfoStream << "<INFO> " << msg; \
ELPP_INTERNAL_DEBUGGING_OUT_INFO << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) \
<< ELPP_INTERNAL_DEBUGGING_ENDL; }}
# endif
#else
# undef ELPP_INTERNAL_INFO
# define ELPP_INTERNAL_INFO(lvl, msg)
#endif // (defined(ELPP_DEBUG_INFO))
#if (defined(ELPP_FEATURE_ALL)) || (defined(ELPP_FEATURE_CRASH_LOG))
# if (ELPP_COMPILER_GCC && !ELPP_MINGW && !ELPP_OS_ANDROID)
# define ELPP_STACKTRACE 1
# else
# if ELPP_COMPILER_MSVC
# pragma message("Stack trace not available for this compiler")
# else
# warning "Stack trace not available for this compiler";
# endif // ELPP_COMPILER_MSVC
# define ELPP_STACKTRACE 0
# endif // ELPP_COMPILER_GCC
#else
# define ELPP_STACKTRACE 0
#endif // (defined(ELPP_FEATURE_ALL)) || (defined(ELPP_FEATURE_CRASH_LOG))
// Miscellaneous macros
#define ELPP_UNUSED(x) (void)x
#if ELPP_OS_UNIX
// Log file permissions for unix-based systems
# define ELPP_LOG_PERMS S_IRUSR | S_IWUSR | S_IXUSR | S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IXOTH
#endif // ELPP_OS_UNIX
#if defined(ELPP_AS_DLL) && ELPP_COMPILER_MSVC
# if defined(ELPP_EXPORT_SYMBOLS)
# define ELPP_EXPORT __declspec(dllexport)
# else
# define ELPP_EXPORT __declspec(dllimport)
# endif // defined(ELPP_EXPORT_SYMBOLS)
#else
# define ELPP_EXPORT
#endif // defined(ELPP_AS_DLL) && ELPP_COMPILER_MSVC
// Some special functions that are VC++ specific
#undef STRTOK
#undef STRERROR
#undef STRCAT
#undef STRCPY
#if ELPP_CRT_DBG_WARNINGS
# define STRTOK(a, b, c) strtok_s(a, b, c)
# define STRERROR(a, b, c) strerror_s(a, b, c)
# define STRCAT(a, b, len) strcat_s(a, len, b)
# define STRCPY(a, b, len) strcpy_s(a, len, b)
#else
# define STRTOK(a, b, c) strtok(a, b)
# define STRERROR(a, b, c) strerror(c)
# define STRCAT(a, b, len) strcat(a, b)
# define STRCPY(a, b, len) strcpy(a, b)
#endif
// Compiler specific support evaluations
#if (ELPP_MINGW && !defined(ELPP_FORCE_USE_STD_THREAD))
# define ELPP_USE_STD_THREADING 0
#else
# if ((ELPP_COMPILER_CLANG && defined(ELPP_CLANG_SUPPORTS_THREAD)) || \
(!ELPP_COMPILER_CLANG && defined(ELPP_CXX11)) || \
defined(ELPP_FORCE_USE_STD_THREAD))
# define ELPP_USE_STD_THREADING 1
# else
# define ELPP_USE_STD_THREADING 0
# endif
#endif
#undef ELPP_FINAL
#if ELPP_COMPILER_INTEL || (ELPP_GCC_VERSION < 40702)
# define ELPP_FINAL
#else
# define ELPP_FINAL final
#endif // ELPP_COMPILER_INTEL || (ELPP_GCC_VERSION < 40702)
#if defined(ELPP_EXPERIMENTAL_ASYNC)
# define ELPP_ASYNC_LOGGING 1
#else
# define ELPP_ASYNC_LOGGING 0
#endif // defined(ELPP_EXPERIMENTAL_ASYNC)
#if defined(ELPP_THREAD_SAFE) || ELPP_ASYNC_LOGGING
# define ELPP_THREADING_ENABLED 1
#else
# define ELPP_THREADING_ENABLED 0
#endif // defined(ELPP_THREAD_SAFE) || ELPP_ASYNC_LOGGING
// Function macro ELPP_FUNC
#undef ELPP_FUNC
#if ELPP_COMPILER_MSVC // Visual C++
# define ELPP_FUNC __FUNCSIG__
#elif ELPP_COMPILER_GCC // GCC
# define ELPP_FUNC __PRETTY_FUNCTION__
#elif ELPP_COMPILER_INTEL // Intel C++
# define ELPP_FUNC __PRETTY_FUNCTION__
#elif ELPP_COMPILER_CLANG // Clang++
# define ELPP_FUNC __PRETTY_FUNCTION__
#else
# if defined(__func__)
# define ELPP_FUNC __func__
# else
# define ELPP_FUNC ""
# endif // defined(__func__)
#endif // defined(_MSC_VER)
#undef ELPP_VARIADIC_TEMPLATES_SUPPORTED
// Keep following line commented until features are fixed
#define ELPP_VARIADIC_TEMPLATES_SUPPORTED \
(ELPP_COMPILER_GCC || ELPP_COMPILER_CLANG || ELPP_COMPILER_INTEL || (ELPP_COMPILER_MSVC && _MSC_VER >= 1800))
// Logging Enable/Disable macros
#if defined(ELPP_DISABLE_LOGS)
#define ELPP_LOGGING_ENABLED 0
#else
#define ELPP_LOGGING_ENABLED 1
#endif
#if (!defined(ELPP_DISABLE_DEBUG_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_DEBUG_LOG 1
#else
# define ELPP_DEBUG_LOG 0
#endif // (!defined(ELPP_DISABLE_DEBUG_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_INFO_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_INFO_LOG 1
#else
# define ELPP_INFO_LOG 0
#endif // (!defined(ELPP_DISABLE_INFO_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_WARNING_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_WARNING_LOG 1
#else
# define ELPP_WARNING_LOG 0
#endif // (!defined(ELPP_DISABLE_WARNING_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_ERROR_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_ERROR_LOG 1
#else
# define ELPP_ERROR_LOG 0
#endif // (!defined(ELPP_DISABLE_ERROR_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_FATAL_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_FATAL_LOG 1
#else
# define ELPP_FATAL_LOG 0
#endif // (!defined(ELPP_DISABLE_FATAL_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_TRACE_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_TRACE_LOG 1
#else
# define ELPP_TRACE_LOG 0
#endif // (!defined(ELPP_DISABLE_TRACE_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!defined(ELPP_DISABLE_VERBOSE_LOGS) && (ELPP_LOGGING_ENABLED))
# define ELPP_VERBOSE_LOG 1
#else
# define ELPP_VERBOSE_LOG 0
#endif // (!defined(ELPP_DISABLE_VERBOSE_LOGS) && (ELPP_LOGGING_ENABLED))
#if (!(ELPP_CXX0X || ELPP_CXX11))
# error "C++0x (or higher) support not detected! (Is `-std=c++11' missing?)"
#endif // (!(ELPP_CXX0X || ELPP_CXX11))
// Headers
#if defined(ELPP_SYSLOG)
# include <syslog.h>
#endif // defined(ELPP_SYSLOG)
#include <ctime>
#include <cstring>
#include <cstdlib>
#include <cctype>
#include <cwchar>
#include <csignal>
#include <cerrno>
#include <cstdarg>
#if defined(ELPP_UNICODE)
# include <locale>
# if ELPP_OS_WINDOWS
# include <codecvt>
# endif // ELPP_OS_WINDOWS
#endif // defined(ELPP_UNICODE)
#if ELPP_STACKTRACE
# include <cxxabi.h>
# include <execinfo.h>
#endif // ELPP_STACKTRACE
#if ELPP_OS_ANDROID
# include <sys/system_properties.h>
#endif // ELPP_OS_ANDROID
#if ELPP_OS_UNIX
# include <sys/stat.h>
# include <sys/time.h>
#elif ELPP_OS_WINDOWS
# include <direct.h>
# include <windows.h>
# if defined(WIN32_LEAN_AND_MEAN)
# if defined(ELPP_WINSOCK2)
# include <winsock2.h>
# else
# include <winsock.h>
# endif // defined(ELPP_WINSOCK2)
# endif // defined(WIN32_LEAN_AND_MEAN)
#endif // ELPP_OS_UNIX
#include <string>
#include <vector>
#include <map>
#include <utility>
#include <functional>
#include <algorithm>
#include <fstream>
#include <iostream>
#include <sstream>
#include <memory>
#include <type_traits>
#if ELPP_THREADING_ENABLED
# if ELPP_USE_STD_THREADING
# include <mutex>
# include <thread>
# else
# if ELPP_OS_UNIX
# include <pthread.h>
# endif // ELPP_OS_UNIX
# endif // ELPP_USE_STD_THREADING
#endif // ELPP_THREADING_ENABLED
#if ELPP_ASYNC_LOGGING
# if defined(ELPP_NO_SLEEP_FOR)
# include <unistd.h>
# endif // defined(ELPP_NO_SLEEP_FOR)
# include <thread>
# include <queue>
# include <condition_variable>
#endif // ELPP_ASYNC_LOGGING
#if defined(ELPP_STL_LOGGING)
// For logging STL based templates
# include <list>
# include <queue>
# include <deque>
# include <set>
# include <bitset>
# include <stack>
# if defined(ELPP_LOG_STD_ARRAY)
# include <array>
# endif // defined(ELPP_LOG_STD_ARRAY)
# if defined(ELPP_LOG_UNORDERED_MAP)
# include <unordered_map>
# endif // defined(ELPP_LOG_UNORDERED_MAP)
# if defined(ELPP_LOG_UNORDERED_SET)
# include <unordered_set>
# endif // defined(ELPP_UNORDERED_SET)
#endif // defined(ELPP_STL_LOGGING)
#if defined(ELPP_QT_LOGGING)
// For logging Qt based classes & templates
# include <QString>
# include <QByteArray>
# include <QVector>
# include <QList>
# include <QPair>
# include <QMap>
# include <QQueue>
# include <QSet>
# include <QLinkedList>
# include <QHash>
# include <QMultiHash>
# include <QStack>
#endif // defined(ELPP_QT_LOGGING)
#if defined(ELPP_BOOST_LOGGING)
// For logging boost based classes & templates
# include <boost/container/vector.hpp>
# include <boost/container/stable_vector.hpp>
# include <boost/container/list.hpp>
# include <boost/container/deque.hpp>
# include <boost/container/map.hpp>
# include <boost/container/flat_map.hpp>
# include <boost/container/set.hpp>
# include <boost/container/flat_set.hpp>
#endif // defined(ELPP_BOOST_LOGGING)
#if defined(ELPP_WXWIDGETS_LOGGING)
// For logging wxWidgets based classes & templates
# include <wx/vector.h>
#endif // defined(ELPP_WXWIDGETS_LOGGING)
#if defined(ELPP_UTC_DATETIME)
# define elpptime_r gmtime_r
# define elpptime_s gmtime_s
# define elpptime gmtime
#else
# define elpptime_r localtime_r
# define elpptime_s localtime_s
# define elpptime localtime
#endif // defined(ELPP_UTC_DATETIME)
// Forward declarations
namespace el {
class Logger;
class LogMessage;
class PerformanceTrackingData;
class Loggers;
class Helpers;
template <typename T> class Callback;
class LogDispatchCallback;
class PerformanceTrackingCallback;
class LoggerRegistrationCallback;
class LogDispatchData;
namespace base {
class Storage;
class RegisteredLoggers;
class PerformanceTracker;
class MessageBuilder;
class Writer;
class PErrorWriter;
class LogDispatcher;
class DefaultLogBuilder;
class DefaultLogDispatchCallback;
#if ELPP_ASYNC_LOGGING
class AsyncLogDispatchCallback;
class AsyncDispatchWorker;
#endif // ELPP_ASYNC_LOGGING
class DefaultPerformanceTrackingCallback;
} // namespace base
} // namespace el
/// @brief Easylogging++ entry namespace
namespace el {
/// @brief Namespace containing base/internal functionality used by Easylogging++
namespace base {
/// @brief Data types used by Easylogging++
namespace type {
#undef ELPP_LITERAL
#undef ELPP_STRLEN
#undef ELPP_COUT
#if defined(ELPP_UNICODE)
# define ELPP_LITERAL(txt) L##txt
# define ELPP_STRLEN wcslen
# if defined ELPP_CUSTOM_COUT
# define ELPP_COUT ELPP_CUSTOM_COUT
# else
# define ELPP_COUT std::wcout
# endif // defined ELPP_CUSTOM_COUT
typedef wchar_t char_t;
typedef std::wstring string_t;
typedef std::wstringstream stringstream_t;
typedef std::wfstream fstream_t;
typedef std::wostream ostream_t;
#else
# define ELPP_LITERAL(txt) txt
# define ELPP_STRLEN strlen
# if defined ELPP_CUSTOM_COUT
# define ELPP_COUT ELPP_CUSTOM_COUT
# else
# define ELPP_COUT std::cout
# endif // defined ELPP_CUSTOM_COUT
typedef char char_t;
typedef std::string string_t;
typedef std::stringstream stringstream_t;
typedef std::fstream fstream_t;
typedef std::ostream ostream_t;
#endif // defined(ELPP_UNICODE)
#if defined(ELPP_CUSTOM_COUT_LINE)
# define ELPP_COUT_LINE(logLine) ELPP_CUSTOM_COUT_LINE(logLine)
#else
# define ELPP_COUT_LINE(logLine) logLine << std::flush
#endif // defined(ELPP_CUSTOM_COUT_LINE)
typedef unsigned int EnumType;
typedef unsigned short VerboseLevel;
typedef unsigned long int LineNumber;
typedef std::shared_ptr<base::Storage> StoragePointer;
typedef std::shared_ptr<LogDispatchCallback> LogDispatchCallbackPtr;
typedef std::shared_ptr<PerformanceTrackingCallback> PerformanceTrackingCallbackPtr;
typedef std::shared_ptr<LoggerRegistrationCallback> LoggerRegistrationCallbackPtr;
typedef std::unique_ptr<el::base::PerformanceTracker> PerformanceTrackerPtr;
} // namespace type
/// @brief Internal helper class that prevent copy constructor for class
///
/// @detail When using this class simply inherit it privately
class NoCopy {
protected:
NoCopy(void) {}
private:
NoCopy(const NoCopy&);
NoCopy& operator=(const NoCopy&);
};
/// @brief Internal helper class that makes all default constructors private.
///
/// @detail This prevents initializing class making it static unless an explicit constructor is declared.
/// When using this class simply inherit it privately
class StaticClass {
private:
StaticClass(void);
StaticClass(const StaticClass&);
StaticClass& operator=(const StaticClass&);
};
} // namespace base
/// @brief Represents enumeration for severity level used to determine level of logging
///
/// @detail With Easylogging++, developers may disable or enable any level regardless of
/// what the severity is. Or they can choose to log using hierarchical logging flag
enum class Level : base::type::EnumType {
/// @brief Generic level that represents all the levels. Useful when setting global configuration for all levels
Global = 1,
/// @brief Information that can be useful to back-trace certain events - mostly useful than debug logs.
Trace = 2,
/// @brief Informational events most useful for developers to debug application
Debug = 4,
/// @brief Severe error information that will presumably abort application
Fatal = 8,
/// @brief Information representing errors in application but application will keep running
Error = 16,
/// @brief Useful when application has potentially harmful situtaions
Warning = 32,
/// @brief Information that can be highly useful and vary with verbose logging level.
Verbose = 64,
/// @brief Mainly useful to represent current progress of application
Info = 128,
/// @brief Represents unknown level
Unknown = 1010
};
/// @brief Static class that contains helper functions for el::Level
class LevelHelper : base::StaticClass {
public:
/// @brief Represents minimum valid level. Useful when iterating through enum.
static const base::type::EnumType kMinValid = static_cast<base::type::EnumType>(Level::Trace);
/// @brief Represents maximum valid level. This is used internally and you should not need it.
static const base::type::EnumType kMaxValid = static_cast<base::type::EnumType>(Level::Info);
/// @brief Casts level to int, useful for iterating through enum.
static base::type::EnumType castToInt(Level level) {
return static_cast<base::type::EnumType>(level);
}
/// @brief Casts int(ushort) to level, useful for iterating through enum.
static Level castFromInt(base::type::EnumType l) {
return static_cast<Level>(l);
}
/// @brief Converts level to associated const char*
/// @return Upper case string based level.
static const char* convertToString(Level level);
/// @brief Converts from levelStr to Level
/// @param levelStr Upper case string based level.
/// Lower case is also valid but providing upper case is recommended.
static Level convertFromString(const char* levelStr);
/// @brief Applies specified function to each level starting from startIndex
/// @param startIndex initial value to start the iteration from. This is passed as pointer and
/// is left-shifted so this can be used inside function (fn) to represent current level.
/// @param fn function to apply with each level. This bool represent whether or not to stop iterating through levels.
static void forEachLevel(base::type::EnumType* startIndex, const std::function<bool(void)>& fn);
};
/// @brief Represents enumeration of ConfigurationType used to configure or access certain aspect
/// of logging
enum class ConfigurationType : base::type::EnumType {
/// @brief Determines whether or not corresponding level and logger of logging is enabled
/// You may disable all logs by using el::Level::Global
Enabled = 1,
/// @brief Whether or not to write corresponding log to log file
ToFile = 2,
/// @brief Whether or not to write corresponding level and logger log to standard output.
/// By standard output meaning termnal, command prompt etc
ToStandardOutput = 4,
/// @brief Determines format of logging corresponding level and logger.
Format = 8,
/// @brief Determines log file (full path) to write logs to for correponding level and logger
Filename = 16,
/// @brief Specifies precision of the subsecond part. It should be within range (1-6).
SubsecondPrecision = 32,
/// @brief Alias of SubsecondPrecision (for backward compatibility)
MillisecondsWidth = SubsecondPrecision,
/// @brief Determines whether or not performance tracking is enabled.
///
/// @detail This does not depend on logger or level. Performance tracking always uses 'performance' logger
PerformanceTracking = 64,
/// @brief Specifies log file max size.
///
/// @detail If file size of corresponding log file (for corresponding level) is >= specified size, log file will
/// be truncated and re-initiated.
MaxLogFileSize = 128,
/// @brief Specifies number of log entries to hold until we flush pending log data
LogFlushThreshold = 256,
/// @brief Represents unknown configuration
Unknown = 1010
};
/// @brief Static class that contains helper functions for el::ConfigurationType
class ConfigurationTypeHelper : base::StaticClass {
public:
/// @brief Represents minimum valid configuration type. Useful when iterating through enum.
static const base::type::EnumType kMinValid = static_cast<base::type::EnumType>(ConfigurationType::Enabled);
/// @brief Represents maximum valid configuration type. This is used internally and you should not need it.
static const base::type::EnumType kMaxValid = static_cast<base::type::EnumType>(ConfigurationType::MaxLogFileSize);
/// @brief Casts configuration type to int, useful for iterating through enum.
static base::type::EnumType castToInt(ConfigurationType configurationType) {
return static_cast<base::type::EnumType>(configurationType);
}
/// @brief Casts int(ushort) to configurationt type, useful for iterating through enum.
static ConfigurationType castFromInt(base::type::EnumType c) {
return static_cast<ConfigurationType>(c);
}
/// @brief Converts configuration type to associated const char*
/// @returns Upper case string based configuration type.
static const char* convertToString(ConfigurationType configurationType);
/// @brief Converts from configStr to ConfigurationType
/// @param configStr Upper case string based configuration type.
/// Lower case is also valid but providing upper case is recommended.
static ConfigurationType convertFromString(const char* configStr);
/// @brief Applies specified function to each configuration type starting from startIndex
/// @param startIndex initial value to start the iteration from. This is passed by pointer and is left-shifted
/// so this can be used inside function (fn) to represent current configuration type.
/// @param fn function to apply with each configuration type.
/// This bool represent whether or not to stop iterating through configurations.
static inline void forEachConfigType(base::type::EnumType* startIndex, const std::function<bool(void)>& fn);
};
/// @brief Flags used while writing logs. This flags are set by user
enum class LoggingFlag : base::type::EnumType {
/// @brief Makes sure we have new line for each container log entry
NewLineForContainer = 1,
/// @brief Makes sure if -vmodule is used and does not specifies a module, then verbose
/// logging is allowed via that module.
AllowVerboseIfModuleNotSpecified = 2,
/// @brief When handling crashes by default, detailed crash reason will be logged as well
LogDetailedCrashReason = 4,
/// @brief Allows to disable application abortion when logged using FATAL level
DisableApplicationAbortOnFatalLog = 8,
/// @brief Flushes log with every log-entry (performance sensative) - Disabled by default
ImmediateFlush = 16,
/// @brief Enables strict file rolling
StrictLogFileSizeCheck = 32,
/// @brief Make terminal output colorful for supported terminals
ColoredTerminalOutput = 64,
/// @brief Supports use of multiple logging in same macro, e.g, CLOG(INFO, "default", "network")
MultiLoggerSupport = 128,
/// @brief Disables comparing performance tracker's checkpoints
DisablePerformanceTrackingCheckpointComparison = 256,
/// @brief Disable VModules
DisableVModules = 512,
/// @brief Disable VModules extensions
DisableVModulesExtensions = 1024,
/// @brief Enables hierarchical logging
HierarchicalLogging = 2048,
/// @brief Creates logger automatically when not available
CreateLoggerAutomatically = 4096,
/// @brief Adds spaces b/w logs that separated by left-shift operator
AutoSpacing = 8192,
/// @brief Preserves time format and does not convert it to sec, hour etc (performance tracking only)
FixedTimeFormat = 16384
};
namespace base {
/// @brief Namespace containing constants used internally.
namespace consts {
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-variable"
#endif
// Level log values - These are values that are replaced in place of %level format specifier
// Extra spaces after format specifiers are only for readability purposes in log files
static const base::type::char_t* kInfoLevelLogValue = ELPP_LITERAL("INFO");
static const base::type::char_t* kDebugLevelLogValue = ELPP_LITERAL("DEBUG");
static const base::type::char_t* kWarningLevelLogValue = ELPP_LITERAL("WARNING");
static const base::type::char_t* kErrorLevelLogValue = ELPP_LITERAL("ERROR");
static const base::type::char_t* kFatalLevelLogValue = ELPP_LITERAL("FATAL");
static const base::type::char_t* kVerboseLevelLogValue =
ELPP_LITERAL("VERBOSE"); // will become VERBOSE-x where x = verbose level
static const base::type::char_t* kTraceLevelLogValue = ELPP_LITERAL("TRACE");
static const base::type::char_t* kInfoLevelShortLogValue = ELPP_LITERAL("I");
static const base::type::char_t* kDebugLevelShortLogValue = ELPP_LITERAL("D");
static const base::type::char_t* kWarningLevelShortLogValue = ELPP_LITERAL("W");
static const base::type::char_t* kErrorLevelShortLogValue = ELPP_LITERAL("E");
static const base::type::char_t* kFatalLevelShortLogValue = ELPP_LITERAL("F");
static const base::type::char_t* kVerboseLevelShortLogValue = ELPP_LITERAL("V");
static const base::type::char_t* kTraceLevelShortLogValue = ELPP_LITERAL("T");
// Format specifiers - These are used to define log format
static const base::type::char_t* kAppNameFormatSpecifier = ELPP_LITERAL("%app");
static const base::type::char_t* kLoggerIdFormatSpecifier = ELPP_LITERAL("%logger");
static const base::type::char_t* kThreadIdFormatSpecifier = ELPP_LITERAL("%thread");
static const base::type::char_t* kSeverityLevelFormatSpecifier = ELPP_LITERAL("%level");
static const base::type::char_t* kSeverityLevelShortFormatSpecifier = ELPP_LITERAL("%levshort");
static const base::type::char_t* kDateTimeFormatSpecifier = ELPP_LITERAL("%datetime");
static const base::type::char_t* kLogFileFormatSpecifier = ELPP_LITERAL("%file");
static const base::type::char_t* kLogFileBaseFormatSpecifier = ELPP_LITERAL("%fbase");
static const base::type::char_t* kLogLineFormatSpecifier = ELPP_LITERAL("%line");
static const base::type::char_t* kLogLocationFormatSpecifier = ELPP_LITERAL("%loc");
static const base::type::char_t* kLogFunctionFormatSpecifier = ELPP_LITERAL("%func");
static const base::type::char_t* kCurrentUserFormatSpecifier = ELPP_LITERAL("%user");
static const base::type::char_t* kCurrentHostFormatSpecifier = ELPP_LITERAL("%host");
static const base::type::char_t* kMessageFormatSpecifier = ELPP_LITERAL("%msg");
static const base::type::char_t* kVerboseLevelFormatSpecifier = ELPP_LITERAL("%vlevel");
static const char* kDateTimeFormatSpecifierForFilename = "%datetime";
// Date/time
static const char* kDays[7] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
static const char* kDaysAbbrev[7] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static const char* kMonths[12] = { "January", "February", "March", "Apri", "May", "June", "July", "August",
"September", "October", "November", "December"
};
static const char* kMonthsAbbrev[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
static const char* kDefaultDateTimeFormat = "%Y-%M-%d %H:%m:%s,%g";
static const char* kDefaultDateTimeFormatInFilename = "%Y-%M-%d_%H-%m";
static const int kYearBase = 1900;
static const char* kAm = "AM";
static const char* kPm = "PM";
// Miscellaneous constants
#ifdef ELPP_DEFAULT_LOGGER
static const char* kDefaultLoggerId = ELPP_DEFAULT_LOGGER;
#else
static const char* kDefaultLoggerId = "default";
#endif
#ifdef ELPP_DEFAULT_PERFORMANCE_LOGGER
static const char* kPerformanceLoggerId = ELPP_DEFAULT_PERFORMANCE_LOGGER;
#else
static const char* kPerformanceLoggerId = "performance";
#endif
#if defined(ELPP_SYSLOG)
static const char* kSysLogLoggerId = "syslog";
#endif // defined(ELPP_SYSLOG)
static const char* kNullPointer = "nullptr";
static const char kFormatSpecifierChar = '%';
#if ELPP_VARIADIC_TEMPLATES_SUPPORTED
static const char kFormatSpecifierCharValue = 'v';
#endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED
static const unsigned int kMaxLogPerContainer = 100;
static const unsigned int kMaxLogPerCounter = 100000;
static const unsigned int kDefaultSubsecondPrecision = 3;
static const base::type::VerboseLevel kMaxVerboseLevel = 9;
static const char* kUnknownUser = "user";
static const char* kUnknownHost = "unknown-host";
#if defined(ELPP_DEFAULT_LOG_FILE)
static const char* kDefaultLogFile = ELPP_DEFAULT_LOG_FILE;
#else
# if ELPP_OS_UNIX
# if ELPP_OS_ANDROID
static const char* kDefaultLogFile = "logs/myeasylog.log";
# else
static const char* kDefaultLogFile = "logs/myeasylog.log";
# endif // ELPP_OS_ANDROID
# elif ELPP_OS_WINDOWS
static const char* kDefaultLogFile = "logs\\myeasylog.log";
# endif // ELPP_OS_UNIX
#endif // defined(ELPP_DEFAULT_LOG_FILE)
#if !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
static const char* kDefaultLogFileParam = "--default-log-file";
#endif // !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
#if defined(ELPP_LOGGING_FLAGS_FROM_ARG)
static const char* kLoggingFlagsParam = "--logging-flags";
#endif // defined(ELPP_LOGGING_FLAGS_FROM_ARG)
#if ELPP_OS_WINDOWS
static const char* kFilePathSeperator = "\\";
#else
static const char* kFilePathSeperator = "/";
#endif // ELPP_OS_WINDOWS
static const char* kValidLoggerIdSymbols =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._";
static const char* kConfigurationComment = "##";
static const char* kConfigurationLevel = "*";
static const char* kConfigurationLoggerId = "--";
static const std::size_t kSourceFilenameMaxLength = 100;
static const std::size_t kSourceLineMaxLength = 10;
static const Level kPerformanceTrackerDefaultLevel = Level::Info;
const struct {
double value;
const base::type::char_t* unit;
} kTimeFormats[] = {
{ 1000.0f, ELPP_LITERAL("us") },
{ 1000.0f, ELPP_LITERAL("ms") },
{ 60.0f, ELPP_LITERAL("seconds") },
{ 60.0f, ELPP_LITERAL("minutes") },
{ 24.0f, ELPP_LITERAL("hours") },
{ 7.0f, ELPP_LITERAL("days") }
};
static const int kTimeFormatsCount = sizeof(kTimeFormats) / sizeof(kTimeFormats[0]);
const struct {
int numb;
const char* name;
const char* brief;
const char* detail;
} kCrashSignals[] = {
// NOTE: Do not re-order, if you do please check CrashHandler(bool) constructor and CrashHandler::setHandler(..)
{
SIGABRT, "SIGABRT", "Abnormal termination",
"Program was abnormally terminated."
},
{
SIGFPE, "SIGFPE", "Erroneous arithmetic operation",
"Arithemetic operation issue such as division by zero or operation resulting in overflow."
},
{
SIGILL, "SIGILL", "Illegal instruction",
"Generally due to a corruption in the code or to an attempt to execute data."
},
{
SIGSEGV, "SIGSEGV", "Invalid access to memory",
"Program is trying to read an invalid (unallocated, deleted or corrupted) or inaccessible memory."
},
{
SIGINT, "SIGINT", "Interactive attention signal",
"Interruption generated (generally) by user or operating system."
},
};
static const int kCrashSignalsCount = sizeof(kCrashSignals) / sizeof(kCrashSignals[0]);
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic pop
#endif
} // namespace consts
} // namespace base
typedef std::function<void(const char*, std::size_t)> PreRollOutCallback;
namespace base {
static inline void defaultPreRollOutCallback(const char*, std::size_t) {}
/// @brief Enum to represent timestamp unit
enum class TimestampUnit : base::type::EnumType {
Microsecond = 0, Millisecond = 1, Second = 2, Minute = 3, Hour = 4, Day = 5
};
/// @brief Format flags used to determine specifiers that are active for performance improvements.
enum class FormatFlags : base::type::EnumType {
DateTime = 1 << 1,
LoggerId = 1 << 2,
File = 1 << 3,
Line = 1 << 4,
Location = 1 << 5,
Function = 1 << 6,
User = 1 << 7,
Host = 1 << 8,
LogMessage = 1 << 9,
VerboseLevel = 1 << 10,
AppName = 1 << 11,
ThreadId = 1 << 12,
Level = 1 << 13,
FileBase = 1 << 14,
LevelShort = 1 << 15
};
/// @brief A subsecond precision class containing actual width and offset of the subsecond part
class SubsecondPrecision {
public:
SubsecondPrecision(void) {
init(base::consts::kDefaultSubsecondPrecision);
}
explicit SubsecondPrecision(int width) {
init(width);
}
bool operator==(const SubsecondPrecision& ssPrec) {
return m_width == ssPrec.m_width && m_offset == ssPrec.m_offset;
}
int m_width;
unsigned int m_offset;
private:
void init(int width);
};
/// @brief Type alias of SubsecondPrecision
typedef SubsecondPrecision MillisecondsWidth;
/// @brief Namespace containing utility functions/static classes used internally
namespace utils {
/// @brief Deletes memory safely and points to null
template <typename T>
static
typename std::enable_if<std::is_pointer<T*>::value, void>::type
safeDelete(T*& pointer) {
if (pointer == nullptr)
return;
delete pointer;
pointer = nullptr;
}
/// @brief Bitwise operations for C++11 strong enum class. This casts e into Flag_T and returns value after bitwise operation
/// Use these function as <pre>flag = bitwise::Or<MyEnum>(MyEnum::val1, flag);</pre>
namespace bitwise {
template <typename Enum>
static inline base::type::EnumType And(Enum e, base::type::EnumType flag) {
return static_cast<base::type::EnumType>(flag) & static_cast<base::type::EnumType>(e);
}
template <typename Enum>
static inline base::type::EnumType Not(Enum e, base::type::EnumType flag) {
return static_cast<base::type::EnumType>(flag) & ~(static_cast<base::type::EnumType>(e));
}
template <typename Enum>
static inline base::type::EnumType Or(Enum e, base::type::EnumType flag) {
return static_cast<base::type::EnumType>(flag) | static_cast<base::type::EnumType>(e);
}
} // namespace bitwise
template <typename Enum>
static inline void addFlag(Enum e, base::type::EnumType* flag) {
*flag = base::utils::bitwise::Or<Enum>(e, *flag);
}
template <typename Enum>
static inline void removeFlag(Enum e, base::type::EnumType* flag) {
*flag = base::utils::bitwise::Not<Enum>(e, *flag);
}
template <typename Enum>
static inline bool hasFlag(Enum e, base::type::EnumType flag) {
return base::utils::bitwise::And<Enum>(e, flag) > 0x0;
}
} // namespace utils
namespace threading {
#if ELPP_THREADING_ENABLED
# if !ELPP_USE_STD_THREADING
namespace internal {
/// @brief A mutex wrapper for compiler that dont yet support std::recursive_mutex
class Mutex : base::NoCopy {
public:
Mutex(void) {
# if ELPP_OS_UNIX
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&m_underlyingMutex, &attr);
pthread_mutexattr_destroy(&attr);
# elif ELPP_OS_WINDOWS
InitializeCriticalSection(&m_underlyingMutex);
# endif // ELPP_OS_UNIX
}
virtual ~Mutex(void) {
# if ELPP_OS_UNIX
pthread_mutex_destroy(&m_underlyingMutex);
# elif ELPP_OS_WINDOWS
DeleteCriticalSection(&m_underlyingMutex);
# endif // ELPP_OS_UNIX
}
inline void lock(void) {
# if ELPP_OS_UNIX
pthread_mutex_lock(&m_underlyingMutex);
# elif ELPP_OS_WINDOWS
EnterCriticalSection(&m_underlyingMutex);
# endif // ELPP_OS_UNIX
}
inline bool try_lock(void) {
# if ELPP_OS_UNIX
return (pthread_mutex_trylock(&m_underlyingMutex) == 0);
# elif ELPP_OS_WINDOWS
return TryEnterCriticalSection(&m_underlyingMutex);
# endif // ELPP_OS_UNIX
}
inline void unlock(void) {
# if ELPP_OS_UNIX
pthread_mutex_unlock(&m_underlyingMutex);
# elif ELPP_OS_WINDOWS
LeaveCriticalSection(&m_underlyingMutex);