Merge pull request #2359 from tiolan/master

Revert "Merge pull request #2352 from tiolan/topic/android_buffer"

.clang-format

@@ -0,0 +1,108 @@
+---
+Language:        Cpp
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -4
+AlignAfterOpenBracket: DontAlign
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Right
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:     
+  AfterClass:      true
+  AfterControlStatement: true
+  AfterEnum:       true
+  AfterFunction:   true
+  AfterNamespace:  false
+  AfterObjCDeclaration: true
+  AfterStruct:     true
+  AfterUnion:      true
+  BeforeCatch:     true
+  BeforeElse:      true
+  IndentBraces:    false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: true
+BreakConstructorInitializers: BeforeColon
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: true
+ColumnLimit:     140
+CommentPragmas:  '^ IWYU pragma:'
+CompactNamespaces:  false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:   
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IncludeCategories: 
+  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
+    Priority:        2
+  - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
+    Priority:        3
+  - Regex:           '.*'
+    Priority:        1
+IncludeIsMainRegex: '(Test)?$'
+IndentCaseLabels: false
+IndentWidth:     4
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: true
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Right
+ReflowComments:  true
+SortIncludes:    true
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        8
+UseTab:          Never
+...
+

.gitignore

@@ -1,4 +1,5 @@
-# Auto generated files 
+# Auto generated files
+build/*
 *.slo
 *.lo
 *.o
@@ -45,6 +46,8 @@ example/*
 !example/example.sln
 !example/example.vcxproj
 !example/CMakeLists.txt
+!example/multisink.cpp
+!example/jni
 
 # generated files
 generated
@@ -59,4 +62,10 @@ install_manifest.txt
 /tests/tests.VC.VC.opendb
 /tests/tests.VC.db
 /tests/tests
-/tests/logs/file_helper_test.txt
+/tests/logs/*
+
+# idea
+.idea/
+
+# vscode
+.vscode/

.travis.yml

@@ -85,6 +85,7 @@ script:
   - ./"${BIN}"
   - valgrind --trace-children=yes --leak-check=full ./"${BIN}"
   - cd $CHECKOUT_PATH/tests; make rebuild; ./tests
+  - cd $CHECKOUT_PATH/tests; STYLE=printf make rebuild; ./tests
 
 notifications:
   email: false

CMakeLists.txt

@@ -1,80 +1,115 @@
-#
-# Copyright(c) 2015 Ruslan Baratov.
-# Distributed under the MIT License (http://opensource.org/licenses/MIT)
-#
-
-cmake_minimum_required(VERSION 3.1)
-project(spdlog VERSION 1.0.0)
-
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-add_library(spdlog INTERFACE)
-
-option(SPDLOG_BUILD_EXAMPLES "Build examples" OFF)
-option(SPDLOG_BUILD_TESTS "Build tests" OFF)
-
-target_include_directories(
-    spdlog
-    INTERFACE
-    "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
-    "$<INSTALL_INTERFACE:include>"
-)
-
-set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
-
-include(CTest)
-if(SPDLOG_BUILD_EXAMPLES)
-    add_subdirectory(example)
-endif()
-
-if(SPDLOG_BUILD_TESTS)
-    add_subdirectory(tests)
-endif()
-
-### Install ###
-# * https://github.com/forexample/package-example
-set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
-
-set(config_install_dir "lib/cmake/${PROJECT_NAME}")
-set(include_install_dir "include")
-set(pkgconfig_install_dir "lib/pkgconfig")
-
-set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
-set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
-set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
-set(targets_export_name "${PROJECT_NAME}Targets")
-set(namespace "${PROJECT_NAME}::")
-
-include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-    "${version_config}" COMPATIBILITY SameMajorVersion
-)
-
-# Note: use 'targets_export_name'
-configure_file("cmake/Config.cmake.in" "${project_config}" @ONLY)
-configure_file("cmake/spdlog.pc.in" "${pkg_config}" @ONLY)
-
-install(
-    TARGETS spdlog
-    EXPORT "${targets_export_name}"
-    INCLUDES DESTINATION "${include_install_dir}"
-)
-
-install(DIRECTORY "include/spdlog" DESTINATION "${include_install_dir}")
-
-install(
-    FILES "${project_config}" "${version_config}"
-    DESTINATION "${config_install_dir}"
-)
-
-install(
-    FILES "${pkg_config}"
-    DESTINATION "${pkgconfig_install_dir}"
-)
-
-install(
-    EXPORT "${targets_export_name}"
-    NAMESPACE "${namespace}"
-    DESTINATION "${config_install_dir}"
-)
+#
+# Copyright(c) 2015 Ruslan Baratov.
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
+#
+
+cmake_minimum_required(VERSION 3.1)
+project(spdlog VERSION 0.17.0 LANGUAGES CXX)
+include(CTest)
+include(CMakeDependentOption)
+include(GNUInstallDirs)
+
+#---------------------------------------------------------------------------------------
+# compiler config
+#---------------------------------------------------------------------------------------
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+    set(CMAKE_CXX_FLAGS "-Wall -O3 ${CMAKE_CXX_FLAGS}")
+endif()
+
+#---------------------------------------------------------------------------------------
+# spdlog target
+#---------------------------------------------------------------------------------------
+add_library(spdlog INTERFACE)
+
+option(SPDLOG_BUILD_EXAMPLES "Build examples" OFF)
+cmake_dependent_option(SPDLOG_BUILD_TESTING
+    "Build spdlog tests" ON
+    "BUILD_TESTING" OFF
+)
+
+target_include_directories(
+    spdlog
+    INTERFACE
+    "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)
+
+set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
+
+if(SPDLOG_BUILD_EXAMPLES)
+    add_subdirectory(example)
+endif()
+
+if(SPDLOG_BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
+
+#---------------------------------------------------------------------------------------
+# Install/export targets and files
+#---------------------------------------------------------------------------------------
+# set files and directories
+set(config_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
+set(include_install_dir "${CMAKE_INSTALL_INCLUDEDIR}")
+set(pkgconfig_install_dir "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+set(version_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
+set(project_config "${PROJECT_NAME}Config.cmake")
+set(pkg_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc")
+set(targets_export_name "${PROJECT_NAME}Targets")
+set(namespace "${PROJECT_NAME}::")
+
+# generate package version file
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(
+    "${version_config}" COMPATIBILITY SameMajorVersion
+)
+
+# configure pkg config file
+configure_file("cmake/spdlog.pc.in" "${pkg_config}" @ONLY)
+
+# install targets
+install(
+    TARGETS spdlog
+    EXPORT "${targets_export_name}"
+)
+
+# install headers
+install(
+    DIRECTORY "${HEADER_BASE}/${PROJECT_NAME}"
+    DESTINATION "${include_install_dir}"
+)
+
+# install project version file
+install(
+    FILES "${version_config}"
+    DESTINATION "${config_install_dir}"
+)
+
+# install pkg config file
+install(
+    FILES "${pkg_config}"
+    DESTINATION "${pkgconfig_install_dir}"
+)
+
+# install project config file
+install(
+    EXPORT "${targets_export_name}"
+    NAMESPACE "${namespace}"
+    DESTINATION "${config_install_dir}"
+    FILE ${project_config}
+)
+
+# export build directory config file
+export(
+    EXPORT ${targets_export_name}
+    NAMESPACE "${namespace}"
+    FILE ${project_config}
+)
+
+# register project in CMake user registry
+export(PACKAGE ${PROJECT_NAME})
+
+file(GLOB_RECURSE spdlog_include_SRCS "${HEADER_BASE}/*.h")
+add_custom_target(spdlog_headers_for_ide SOURCES ${spdlog_include_SRCS})

INSTALL

@@ -2,9 +2,9 @@ spdlog is header only library.
 Just copy the files to your build tree and use a C++11 compiler
 
 Tested on:
-gcc 4.8.1 and above
-clang 3.5
-Visual Studio 2013
+gcc 4.8.1 or above
+clang 3.5 or above
+Visual Studio 2013 or above
 
 gcc 4.8 flags: --std==c++11 -pthread -O3 -flto -Wl,--no-as-needed
 gcc 4.9 flags: --std=c++11 -pthread -O3 -flto

README.md

@@ -4,26 +4,42 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
 
 
 ## Install
-Just copy the source [folder](https://github.com/gabime/spdlog/tree/master/include/spdlog) to your build tree and use a C++11 compiler
+#### Just copy the headers:
+
+* Copy the source [folder](https://github.com/gabime/spdlog/tree/master/include/spdlog) to your build tree and use a C++11 compiler.
+
+#### Or use your favorite package manager:
+
+* Ubuntu: `apt-get install libspdlog-dev`
+* Homebrew: `brew install spdlog`
+* FreeBSD:  `cd /usr/ports/devel/spdlog/ && make install clean`
+* Fedora: `yum install spdlog`
+* Gentoo: `emerge dev-libs/spdlog`
+* Arch Linux: `yaourt -S spdlog-git`
+* vcpkg: `vcpkg install spdlog`
+ 
 
 ## Platforms
- * Linux (gcc 4.8.1+, clang 3.5+)
- * Windows (visual studio 2013+, cygwin/mingw with g++ 4.9.1+)
+ * Linux, FreeBSD, Solaris, AIX
+ * Windows (vc 2013+, cygwin)
  * Mac OSX (clang 3.5+)
+ * Android
 
-##Features
+## Features
 * Very fast - performance is the primary goal (see [benchmarks](#benchmarks) below).
-* Headers only.
-* No dependencies - just copy and use.
+* Headers only, just copy and use.
 * Feature rich [call style](#usage-example) using the excellent [fmt](https://github.com/fmtlib/fmt) library.
-* Extremely fast asynchronous mode (optional) - using lockfree queues and other tricks to reach millions of calls/sec.
+* Optional printf syntax support.
+* Asynchronous mode (optional)
 * [Custom](https://github.com/gabime/spdlog/wiki/3.-Custom-formatting) formatting.
+* Conditional Logging
 * Multi/Single threaded loggers.
 * Various log targets:
     * Rotating log files.
     * Daily log files.
     * Console logging (colors supported).
-    * Linux syslog.
+    * syslog.
+    * Windows debugger (```OutputDebugString(..)```)
     * Easily extendable with custom log targets  (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
 * Severity based filtering - threshold levels can be modified in runtime as well as in compile time.
 
@@ -38,9 +54,9 @@ Time needed to log 1,000,000 lines in synchronous mode (in seconds, the best of
 
 |threads|boost log 1.54|glog   |easylogging |spdlog|
 |-------|:-------:|:-----:|----------:|------:|
-|1|       4.169s  |1.066s |0.975s     |0.302s|
-|10|     6.180s   |3.032s |2.857s     |0.968s|
-|100|     5.981s  |1.139s |4.512s     |0.497s|
+|1|       4.169s  |1.066s |0.975s     |0.392s|
+|10|     6.180s   |3.032s |2.857s     |0.773s|
+|100|     5.981s  |1.139s |4.512s     |0.587s|
 
 
 #### Asynchronous mode
@@ -48,104 +64,156 @@ Time needed to log 1,000,000 lines in asynchronous mode, i.e. the time it takes
 
 |threads|g2log <sup>async logger</sup>   |spdlog <sup>async mode</sup>|
 |:-------|:-----:|-------------------------:|
-|1|       1.850s |0.216s |
-|10|      0.943s  |0.173s|
-|100|      0.959s |0.202s|
+|1|       1.850s |0.39s |
+|10|      0.943s  |0.416s|
+|100|      0.959s |0.413s|
 
 
 
 
 ## Usage Example
 ```c++
-#include <iostream>
+
 #include "spdlog/spdlog.h"
 
-int main(int, char* [])
+#include <iostream>
+#include <memory>
+
+void async_example();
+void syslog_example();
+void user_defined_example();
+void err_handler_example();
+
+namespace spd = spdlog;
+int main(int, char*[])
 {
-    namespace spd = spdlog;
     try
     {
-        // console logger (multithreaded and with color)
-        auto console = spd::stdout_logger_mt("console", true);
-        console->info("Welcome to spdlog!") ;
-        console->info("An info message example {}..", 1);        
-
-        //Formatting examples
-        console->info("Easy padding in numbers like {:08d}", 12);
-        console->info("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+        // Console logger with color
+        auto console = spd::stdout_color_mt("console");
+        console->info("Welcome to spdlog!");
+        console->error("Some error message with arg{}..", 1);
+	
+        // Formatting examples
+        console->warn("Easy padding in numbers like {:08d}", 12);
+        console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
         console->info("Support for floats {:03.2f}", 1.23456);
         console->info("Positional args are {1} {0}..", "too", "supported");
-
         console->info("{:<30}", "left aligned");
-        console->info("{:>30}", "right aligned");
-        console->info("{:^30}", "centered");
-
-        //
-        // Runtime log levels
-        //
-        spd::set_level(spd::level::info); //Set global log level to info
-        console->debug("This message shold not be displayed!");
-        console->set_level(spd::level::debug); // Set specific logger's log level
-        console->debug("Now it should..");
+	
+	// Use global registry to retrieve loggers
+        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
         
-        //
-        // Create a basic multithreaded file logger (or "basic_logger_st" for single threaded logger)
-        //
+        // Create basic file logger (not rotated)
         auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic.txt");
         my_logger->info("Some log message");
 
-        //
         // Create a file rotating logger with 5mb size max and 3 rotated files
-        //
-        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile", 1048576 * 5, 3);
-        for(int i = 0; i < 10; ++i)
-		      rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
+        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile.txt", 1048576 * 5, 3);
+        for (int i = 0; i < 10; ++i)
+            rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
 
-        //
         // Create a daily logger - a new file is created every day on 2:30am
-        //
-        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);
+        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+        // trigger flush if the log severity is error or higher
+        daily_logger->flush_on(spd::level::err);
+        daily_logger->info(123.44);
 
-        //
         // Customize msg format for all messages
-        //
-        spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
-        rotating_logger->info("This is another message with custom format");
+        spd::set_pattern("[%^+++%$] [%H:%M:%S %z] [thread %t] %v");
+        console->info("This an info message with custom format (and custom color range between the '%^' and '%$')");
+	console->error("This an error message with custom format (and custom color range between the '%^' and '%$')");
 
-        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
+        // Runtime log levels
+	spd::set_level(spd::level::info); //Set global log level to info
+	console->debug("This message should not be displayed!");
+	console->set_level(spd::level::debug); // Set specific logger's log level
+	console->debug("This message should be displayed..");
 
-        //
-        // Compile time debug or trace macros.
-        // Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
-        //
+        // Compile time log levels
+        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
         SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
         SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
 
-        //
         // Asynchronous logging is very fast..
         // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
-        //
-        size_t q_size = 8192; //queue size must be power of 2
-        spdlog::set_async_mode(q_size);
-        auto async_file= spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
-        async_file->info("This is async log..Should be very fast!");
+        async_example();
 
-        //
-        // syslog example. linux only..
-        //
-        #ifdef __linux__
-        std::string ident = "spdlog-example";
-        auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
-        syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
-        #endif
-                
+        // syslog example. linux/osx only
+        syslog_example();
+
+        // android example. compile with NDK
+        android_example();
+
+        // Log user-defined types example
+        user_defined_example();
+
+        // Change default log error handler
+        err_handler_example();
+
+        // Apply a function on all registered loggers
+        spd::apply_all([&](std::shared_ptr<spd::logger> l)
+        {
+            l->info("End of example.");
+        });
+
+        // Release and close all loggers
+        spd::drop_all();
     }
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
     catch (const spd::spdlog_ex& ex)
     {
-        std::cout << "Log failed: " << ex.what() << std::endl;
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+        return 1;
     }
 }
 
+void async_example()
+{
+    size_t q_size = 4096; 
+    spd::set_async_mode(q_size);
+    auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
+    for (int i = 0; i < 100; ++i)
+        async_file->info("Async message #{}", i);
+}
+
+//syslog example
+void syslog_example()
+{
+#ifdef SPDLOG_ENABLE_SYSLOG 
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog..");
+#endif
+}
+
+// user defined types logging by implementing operator<<
+struct my_type
+{
+    int i;
+    template<typename OStream>
+    friend OStream& operator<<(OStream& os, const my_type &c)
+    {
+        return os << "[my_type i="<<c.i << "]";
+    }
+};
+
+#include <spdlog/fmt/ostr.h> // must be included
+void user_defined_example()
+{
+    spd::get("console")->info("user defined type: {}", my_type { 14 });
+}
+
+//
+//custom error handler
+//
+void err_handler_example()
+{	
+	spd::set_error_handler([](const std::string& msg) {
+		std::cerr << "my err handler: " << msg << std::endl;
+	}); 
+	// (or logger->set_error_handler(..) to set for specific logger)
+}
 
 ```
 

appveyor.yml

@@ -0,0 +1,32 @@
+version: 1.0.{build}
+image: Visual Studio 2015
+environment:
+  matrix:
+  - GENERATOR: '"MinGW Makefiles"'
+    BUILD_TYPE: Debug
+  - GENERATOR: '"MinGW Makefiles"'
+    BUILD_TYPE: Release
+  - GENERATOR: '"Visual Studio 14 2015"'
+    BUILD_TYPE: Debug
+  - GENERATOR: '"Visual Studio 14 2015"'
+    BUILD_TYPE: Release
+  - GENERATOR: '"Visual Studio 14 2015 Win64"'
+    BUILD_TYPE: Debug
+  - GENERATOR: '"Visual Studio 14 2015 Win64"'
+    BUILD_TYPE: Release
+build_script:
+- cmd: >-
+    set
+
+    mkdir build
+
+    cd build
+
+    set PATH=%PATH:C:\Program Files\Git\usr\bin;=%
+
+    set PATH=C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin;%PATH%
+
+    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE%
+
+    cmake --build . --config %BUILD_TYPE%
+test: off

astyle.sh

@@ -1,5 +0,0 @@
-#!/bin/bash
-find . -name "*\.h" -o -name "*\.cpp"|xargs dos2unix
-find . -name "*\.h" -o -name "*\.cpp"|xargs astyle -n -c -A1 
-
-

bench/Makefile

@@ -1,9 +1,18 @@
 CXX	?= g++
-CXXFLAGS	= -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -Wl,--no-as-needed  -I../include
+CXXFLAGS	= -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -I../include
 CXX_RELEASE_FLAGS = -O3 -flto -DNDEBUG
 
 
-binaries=spdlog-bench spdlog-bench-mt spdlog-async zf_log-bench zf_log-bench-mt boost-bench boost-bench-mt glog-bench glog-bench-mt g2log-async easylogging-bench easylogging-bench-mt
+#         g2log-async
+binaries=spdlog-bench spdlog-bench-mt spdlog-async spdlog-null-async \
+         boost-bench boost-bench-mt \
+         glog-bench glog-bench-mt \
+         g3log-async \
+         p7-bench p7-bench-mt \
+         log4cpp-bench log4cpp-bench-mt \
+         log4cplus-bench log4cplus-bench-mt \
+         easylogging-bench easylogging-bench-mt easylogging-bench-async \
+         plog-bench plog-bench-mt
 
 all: $(binaries)
 
@@ -16,16 +25,10 @@ spdlog-bench-mt: spdlog-bench-mt.cpp
 spdlog-async: spdlog-async.cpp
 	$(CXX) spdlog-async.cpp -o spdlog-async  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
 
+spdlog-null-async: spdlog-null-async.cpp
+	$(CXX) spdlog-null-async.cpp -o spdlog-null-async $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
 
-ZF_LOG_FLAGS = -I../../zf_log.git/zf_log/
-zf_log-bench: zf_log-bench.cpp
-	$(CXX) zf_log-bench.cpp -o zf_log-bench  $(CXXFLAGS) $(CXX_RELEASE_FLAGS) $(ZF_LOG_FLAGS)
-
-zf_log-bench-mt: zf_log-bench-mt.cpp
-	$(CXX) zf_log-bench-mt.cpp -o zf_log-bench-mt  $(CXXFLAGS) $(CXX_RELEASE_FLAGS) $(ZF_LOG_FLAGS)
-	
-
-BOOST_FLAGS	= -DBOOST_LOG_DYN_LINK  -I/usr/include -lboost_log  -lboost_log_setup -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono
+BOOST_FLAGS	= -DBOOST_LOG_DYN_LINK -I$(HOME)/include -I/usr/include -L$(HOME)/lib -lboost_log_setup -lboost_log -lboost_filesystem -lboost_system -lboost_thread -lboost_regex -lboost_date_time -lboost_chrono
 
 boost-bench: boost-bench.cpp
 	$(CXX) boost-bench.cpp -o boost-bench $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
@@ -33,33 +36,62 @@ boost-bench: boost-bench.cpp
 boost-bench-mt: boost-bench-mt.cpp
 	$(CXX) boost-bench-mt.cpp -o boost-bench-mt $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)	
 
-
-GLOG_FLAGS = -lglog
+GLOG_FLAGS = -I$(HOME)/include -L$(HOME)/lib -lglog
 glog-bench: glog-bench.cpp
 	$(CXX) glog-bench.cpp -o glog-bench $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)
 	
 glog-bench-mt: glog-bench-mt.cpp
 	$(CXX) glog-bench-mt.cpp -o glog-bench-mt $(CXXFLAGS) $(GLOG_FLAGS) $(CXX_RELEASE_FLAGS)	
 
-
-G2LOG_FLAGS = -I/home/gabi/devel/g2log/g2log/src -L/home/gabi/devel/g2log/g2log -llib_g2logger 
+G2LOG_FLAGS = -I$(HOME)/include -L$(HOME)/lib -llib_g2logger 
 g2log-async: g2log-async.cpp
 	$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
 	
+G3LOG_FLAGS = -I$(HOME)/include -L$(HOME)/lib -lg3logger
+g3log-async: g3log-async.cpp
+	$(CXX) g3log-async.cpp -o g3log-async $(CXXFLAGS) $(G3LOG_FLAGS) $(CXX_RELEASE_FLAGS)
 
-EASYL_FLAGS = -I../../easylogging/src/
+P7_FLAGS = -I$(HOME)/P7/Headers -I$(HOME)/include -L$(HOME)/lib -lP7
+p7-bench: p7-bench.cpp
+	$(CXX) p7-bench.cpp -o p7-bench $(CXXFLAGS) $(P7_FLAGS) $(CXX_RELEASE_FLAGS)
+
+p7-bench-mt: p7-bench-mt.cpp
+	$(CXX) p7-bench-mt.cpp -o p7-bench-mt $(CXXFLAGS) $(P7_FLAGS) $(CXX_RELEASE_FLAGS)
+
+LOG4CPP_FLAGS = -I$(HOME)/include -L$(HOME)/lib -llog4cpp
+log4cpp-bench: log4cpp-bench.cpp
+	$(CXX) log4cpp-bench.cpp -o log4cpp-bench $(CXXFLAGS) $(LOG4CPP_FLAGS) $(CXX_RELEASE_FLAGS)
+
+log4cpp-bench-mt: log4cpp-bench-mt.cpp
+	$(CXX) log4cpp-bench-mt.cpp -o log4cpp-bench-mt $(CXXFLAGS) $(LOG4CPP_FLAGS) $(CXX_RELEASE_FLAGS)
+
+LOG4CPLUS_FLAGS = -I$(HOME)/include -L$(HOME)/lib -llog4cplus
+log4cplus-bench: log4cplus-bench.cpp
+	$(CXX) log4cplus-bench.cpp -o log4cplus-bench $(CXXFLAGS) $(LOG4CPLUS_FLAGS) $(CXX_RELEASE_FLAGS)
+
+log4cplus-bench-mt: log4cplus-bench-mt.cpp
+	$(CXX) log4cplus-bench-mt.cpp -o log4cplus-bench-mt $(CXXFLAGS) $(LOG4CPLUS_FLAGS) $(CXX_RELEASE_FLAGS)
+
+EASYL_FLAGS = -I$(HOME)/easyloggingpp/src
 easylogging-bench: easylogging-bench.cpp
 	$(CXX) easylogging-bench.cpp -o easylogging-bench $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
+
 easylogging-bench-mt: easylogging-bench-mt.cpp
-	$(CXX) easylogging-bench-mt.cpp -o easylogging-bench-mt $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)	
-	
+	$(CXX) easylogging-bench-mt.cpp -o easylogging-bench-mt $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
+
+easylogging-bench-async: easylogging-bench-async.cpp
+	$(CXX) easylogging-bench-async.cpp -o easylogging-bench-async $(CXXFLAGS) $(EASYL_FLAGS) $(CXX_RELEASE_FLAGS)
+
+PLOG_FLAGS = -I$(HOME)/include
+plog-bench: plog-bench.cpp
+	$(CXX) plog-bench.cpp -o plog-bench $(CXXFLAGS) $(PLOG_FLAGS) $(CXX_RELEASE_FLAGS)
+
+plog-bench-mt: plog-bench-mt.cpp
+	$(CXX) plog-bench-mt.cpp -o plog-bench-mt $(CXXFLAGS) $(PLOG_FLAGS) $(CXX_RELEASE_FLAGS)
+
 .PHONY: clean
 
 clean:
 	rm -f *.o logs/* $(binaries)
 
-
 rebuild: clean all
-
-
-

bench/README.md

@@ -0,0 +1,14 @@
+# loggers
+
+Name | License | Lang. | Year | Platform | Compiler | Dependence | URL
+--- | --- | --- | --- | --- | --- | --- | ---
+Pantheios | BSD | C++ | 2017 | Windows, Linux, MacOSX | VC++, GCC(3.2+), Intel, Borland, Comeau, Digital Mars, Metrowerks | STLSoft | http://www.pantheios.org/ <br> http://blog.pantheios.org/ <br> https://github.com/synesissoftware/Pantheios <br> http://www.pantheios.org/performance.html
+Glog | 3-clause BSD| C++| 2017 | Windows, Linux, MacOSX | VC++, GCC, Clang, intel| Google gflags | https://github.com/google/glog
+G3log | Public Domain | C++11 | 2018 | Windows, Linux, MacOSX, iPhoneOS | VC++, GCC, Clang, MinGW | None | https://github.com/KjellKod/g3log <br> https://github.com/KjellKod/g3sinks <br> https://kjellkod.wordpress.com/2014/08/16/presenting-g3log-the-next-version-of-the-next-generation-of-loggers/ <br> https://kjellkod.wordpress.com/2015/06/30/the-worlds-fastest-logger-vs-g3log/
+P7 | LGPL | C++, C, C#, Python | 2017 | Windows, Linux | VC++, GCC, Clang, MinGW | None | http://baical.net/p7.html
+log4cpp | LGPL | C++ | 2017 | Windows, Linux, MacOSX | VC++, GCC, Sun CC, OpenVMS | Boost | http://log4cpp.sourceforge.net/
+log4cplus | 2-clause BSD or Apache 2 | C++ | 2017 | Windows, Linux, MacOSX, Android | VC++, GCC, Clang | Boost | https://github.com/log4cplus/log4cplus <br> https://sourceforge.net/p/log4cplus/wiki/Home/
+Easylogging | MIT | C++11 | 2018 | Windows, Linux, MacOSX, iPhoneOS, Android | VC++, GCC, Clang, Intel, MinGW | None | https://github.com/muflihun/easyloggingpp
+Spdlog | MIT | C++11 | 2018 | Windows, Linux, MacOSX, iPhoneOS, Android(logcat) | VC++, GCC, Clang, MinGW | None, Headers only library | https://github.com/gabime/spdlog <br> https://github.com/fmtlib/fmt
+Boost.Log v2 | Boost | C++ | 2016 | Windows, Linux, MacOSX, iPhoneOS, Android | VC++, GCC, Clang | Boost | https://github.com/boostorg/log <br> http://www.boost.org/doc/libs/1_66_0/libs/log/doc/html/index.html
+plog | MPL 2.0 | C++ | 2017 | Windows, Linux, MacOSX, iPhoneOS, Android | gcc, clang, msvc, mingw, mingw-w64, icc, c++builder | None, Headers only library | https://github.com/SergiusTheBest/plog

bench/boost-bench-mt.cpp

@@ -3,18 +3,20 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <atomic>
+#include <chrono>
+#include <iostream>
 #include <thread>
 #include <vector>
-#include <atomic>
 
 #include <boost/log/core.hpp>
-#include <boost/log/trivial.hpp>
 #include <boost/log/expressions.hpp>
 #include <boost/log/sinks/text_file_backend.hpp>
-#include <boost/log/utility/setup/file.hpp>
-#include <boost/log/utility/setup/common_attributes.hpp>
-#include <boost/log/sources/severity_logger.hpp>
 #include <boost/log/sources/record_ostream.hpp>
+#include <boost/log/sources/severity_logger.hpp>
+#include <boost/log/trivial.hpp>
+#include <boost/log/utility/setup/common_attributes.hpp>
+#include <boost/log/utility/setup/file.hpp>
 
 namespace logging = boost::log;
 namespace src = boost::log::sources;
@@ -23,62 +25,62 @@ namespace keywords = boost::log::keywords;
 
 void init()
 {
-    logging::add_file_log
-    (
-        keywords::file_name = "logs/boost-sample_%N.log",                              /*< file name pattern >*/
-        keywords::auto_flush = false,
-        keywords::format = "[%TimeStamp%]: %Message%"
-    );
+    logging::add_file_log(keywords::file_name = "logs/boost-bench-mt_%N.log", /*< file name pattern >*/
+        keywords::auto_flush = false, keywords::format = "[%TimeStamp%]: %Message%");
 
-    logging::core::get()->set_filter
-    (
-        logging::trivial::severity >= logging::trivial::info
-    );
+    logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::info);
 }
 
-
-
 using namespace std;
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
+    using namespace std::chrono;
+    using clock = steady_clock;
+
     int thread_count = 10;
-    if(argc > 1)
+    if (argc > 1)
         thread_count = atoi(argv[1]);
 
     int howmany = 1000000;
 
-
     init();
     logging::add_common_attributes();
 
-
     using namespace logging::trivial;
 
-    src::severity_logger_mt< severity_level > lg;
+    src::severity_logger_mt<severity_level> lg;
 
-    std::atomic<int > msg_counter {0};
+    std::atomic<int> msg_counter{0};
     vector<thread> threads;
 
+    auto start = clock::now();
     for (int t = 0; t < thread_count; ++t)
     {
-        threads.push_back(std::thread([&]()
-        {
+        threads.push_back(std::thread([&]() {
             while (true)
             {
                 int counter = ++msg_counter;
-                if (counter > howmany) break;
+                if (counter > howmany)
+                    break;
                 BOOST_LOG_SEV(lg, info) << "boost message #" << counter << ": This is some text for your pleasure";
             }
         }));
     }
 
-
-    for(auto &t:threads)
+    for (auto &t : threads)
     {
         t.join();
-    };
+    }
 
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
 
     return 0;
 }

bench/boost-bench.cpp

@@ -3,14 +3,17 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <chrono>
+#include <iostream>
+
 #include <boost/log/core.hpp>
-#include <boost/log/trivial.hpp>
 #include <boost/log/expressions.hpp>
 #include <boost/log/sinks/text_file_backend.hpp>
-#include <boost/log/utility/setup/file.hpp>
-#include <boost/log/utility/setup/common_attributes.hpp>
-#include <boost/log/sources/severity_logger.hpp>
 #include <boost/log/sources/record_ostream.hpp>
+#include <boost/log/sources/severity_logger.hpp>
+#include <boost/log/trivial.hpp>
+#include <boost/log/utility/setup/common_attributes.hpp>
+#include <boost/log/utility/setup/file.hpp>
 
 namespace logging = boost::log;
 namespace src = boost::log::sources;
@@ -19,30 +22,35 @@ namespace keywords = boost::log::keywords;
 
 void init()
 {
-    logging::add_file_log
-    (
-        keywords::file_name = "logs/boost-sample_%N.log",                              /*< file name pattern >*/
-        keywords::auto_flush = false,
-        keywords::format = "[%TimeStamp%]: %Message%"
-    );
+    logging::add_file_log(keywords::file_name = "logs/boost-bench_%N.log", /*< file name pattern >*/
+        keywords::auto_flush = false, keywords::format = "[%TimeStamp%]: %Message%");
 
-    logging::core::get()->set_filter
-    (
-        logging::trivial::severity >= logging::trivial::info
-    );
+    logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::info);
 }
 
-
-int main(int argc, char* [])
+int main(int, char *[])
 {
+    using namespace std::chrono;
+    using clock = steady_clock;
+
     int howmany = 1000000;
     init();
     logging::add_common_attributes();
 
     using namespace logging::trivial;
-    src::severity_logger_mt< severity_level > lg;
-    for(int i  = 0 ; i < howmany; ++i)
+    src::severity_logger_mt<severity_level> lg;
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
         BOOST_LOG_SEV(lg, info) << "boost message #" << i << ": This is some text for your pleasure";
 
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
     return 0;
 }

bench/easyl-async.conf

@@ -0,0 +1,10 @@
+* GLOBAL:
+    FORMAT                  =   "[%datetime]: %levshort %thread %msg"
+    FILENAME                =   ./logs/easylogging-async.log
+    ENABLED                 =   true
+    TO_FILE                 =   true
+    TO_STANDARD_OUTPUT      =   false
+    MILLISECONDS_WIDTH      =   3
+    PERFORMANCE_TRACKING    =   false
+    MAX_LOG_FILE_SIZE       =   10485760
+    Log_Flush_Threshold		= 	10485760

bench/easyl-mt.conf

@@ -0,0 +1,10 @@
+* GLOBAL:
+    FORMAT                  =   "[%datetime]: %levshort %thread %msg"
+    FILENAME                =   ./logs/easylogging-mt.log
+    ENABLED                 =   true
+    TO_FILE                 =   true
+    TO_STANDARD_OUTPUT      =   false
+    MILLISECONDS_WIDTH      =   3
+    PERFORMANCE_TRACKING    =   false
+    MAX_LOG_FILE_SIZE       =   10485760
+    Log_Flush_Threshold		= 	10485760

bench/easyl.conf

@@ -1,5 +1,5 @@
 * GLOBAL:
-    FORMAT                  =   "[%datetime]: %msg"
+    FORMAT                  =   "[%datetime]: %levshort %msg"
     FILENAME                =   ./logs/easylogging.log
     ENABLED                 =   true
     TO_FILE                 =   true

bench/easylogging-bench-async.cpp

@@ -0,0 +1,67 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <atomic>
+#include <chrono>
+#include <iostream>
+#include <thread>
+#include <vector>
+
+#define ELPP_THREAD_SAFE
+#define ELPP_EXPERIMENTAL_ASYNC
+#include "easylogging++.cc"
+#include "easylogging++.h"
+INITIALIZE_EASYLOGGINGPP
+
+using namespace std;
+
+int main(int argc, char *argv[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int thread_count = 10;
+    if (argc > 1)
+        thread_count = atoi(argv[1]);
+
+    int howmany = 1000000;
+
+    // Load configuration from file
+    el::Configurations conf("easyl-async.conf");
+    el::Loggers::reconfigureLogger("default", conf);
+
+    std::atomic<int> msg_counter{0};
+    vector<thread> threads;
+
+    auto start = clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            while (true)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                LOG(INFO) << "easylog message #" << counter << ": This is some text for your pleasure";
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    return 0;
+}

bench/easylogging-bench-mt.cpp

@@ -3,50 +3,64 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <atomic>
+#include <chrono>
+#include <iostream>
 #include <thread>
 #include <vector>
-#include <atomic>
 
-#define _ELPP_THREAD_SAFE
+#define ELPP_THREAD_SAFE
+#include "easylogging++.cc"
 #include "easylogging++.h"
-_INITIALIZE_EASYLOGGINGPP
+INITIALIZE_EASYLOGGINGPP
 
 using namespace std;
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
+    using namespace std::chrono;
+    using clock = steady_clock;
 
     int thread_count = 10;
-    if(argc > 1)
+    if (argc > 1)
         thread_count = atoi(argv[1]);
 
     int howmany = 1000000;
 
     // Load configuration from file
-    el::Configurations conf("easyl.conf");
+    el::Configurations conf("easyl-mt.conf");
     el::Loggers::reconfigureLogger("default", conf);
 
-    std::atomic<int > msg_counter {0};
+    std::atomic<int> msg_counter{0};
     vector<thread> threads;
 
+    auto start = clock::now();
     for (int t = 0; t < thread_count; ++t)
     {
-        threads.push_back(std::thread([&]()
-        {
+        threads.push_back(std::thread([&]() {
             while (true)
             {
                 int counter = ++msg_counter;
-                if (counter > howmany) break;
+                if (counter > howmany)
+                    break;
                 LOG(INFO) << "easylog message #" << counter << ": This is some text for your pleasure";
             }
         }));
     }
 
-
-    for(auto &t:threads)
+    for (auto &t : threads)
     {
         t.join();
-    };
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
 
     return 0;
 }

bench/easylogging-bench.cpp

@@ -3,20 +3,37 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <chrono>
+#include <iostream>
 
+#include "easylogging++.cc"
 #include "easylogging++.h"
+INITIALIZE_EASYLOGGINGPP
 
-_INITIALIZE_EASYLOGGINGPP
-
-int main(int, char* [])
+int main(int, char *[])
 {
+    using namespace std::chrono;
+    using clock = steady_clock;
+
     int howmany = 1000000;
 
     // Load configuration from file
     el::Configurations conf("easyl.conf");
     el::Loggers::reconfigureLogger("default", conf);
 
-    for(int i  = 0 ; i < howmany; ++i)
+    el::Logger *defaultLogger = el::Loggers::getLogger("default");
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
         LOG(INFO) << "easylog message #" << i << ": This is some text for your pleasure";
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
     return 0;
 }

bench/g2log-async.cpp

@@ -3,57 +3,56 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <atomic>
+#include <chrono>
+#include <iostream>
 #include <thread>
 #include <vector>
-#include <atomic>
-#include <iostream>
-#include <chrono>
 
-#include "g2logworker.h"
 #include "g2log.h"
+#include "g2logworker.h"
 
 using namespace std;
-template<typename T> std::string format(const T& value);
+template<typename T>
+std::string format(const T &value);
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
     using namespace std::chrono;
-    using clock=steady_clock;
+    using clock = steady_clock;
     int thread_count = 10;
 
-    if(argc > 1)
+    if (argc > 1)
         thread_count = atoi(argv[1]);
     int howmany = 1000000;
 
     g2LogWorker g2log(argv[0], "logs");
     g2::initializeLogging(&g2log);
 
-
-    std::atomic<int > msg_counter {0};
+    std::atomic<int> msg_counter{0};
     vector<thread> threads;
     auto start = clock::now();
     for (int t = 0; t < thread_count; ++t)
     {
-        threads.push_back(std::thread([&]()
-        {
+        threads.push_back(std::thread([&]() {
             while (true)
             {
                 int counter = ++msg_counter;
-                if (counter > howmany) break;
+                if (counter > howmany)
+                    break;
                 LOG(INFO) << "g2log message #" << counter << ": This is some text for your pleasure";
             }
         }));
     }
 
-
-    for(auto &t:threads)
+    for (auto &t : threads)
     {
         t.join();
-    };
+    }
 
     duration<float> delta = clock::now() - start;
     float deltaf = delta.count();
-    auto rate = howmany/deltaf;
+    auto rate = howmany / deltaf;
 
     cout << "Total: " << howmany << std::endl;
     cout << "Threads: " << thread_count << std::endl;

bench/g3log-async.cpp

@@ -0,0 +1,63 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <atomic>
+#include <chrono>
+#include <iostream>
+#include <thread>
+#include <vector>
+
+#include "g3log/g3log.hpp"
+#include "g3log/logworker.hpp"
+
+using namespace std;
+template<typename T>
+std::string format(const T &value);
+
+int main(int argc, char *argv[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+    int thread_count = 10;
+
+    if (argc > 1)
+        thread_count = atoi(argv[1]);
+
+    int howmany = 1000000;
+
+    auto worker = g3::LogWorker::createLogWorker();
+    auto handle = worker->addDefaultLogger(argv[0], "logs");
+    g3::initializeLogging(worker.get());
+
+    std::atomic<int> msg_counter{0};
+    vector<thread> threads;
+    auto start = clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            while (true)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                LOG(INFO) << "g3log message #" << counter << ": This is some text for your pleasure";
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    cout << "Total: " << howmany << std::endl;
+    cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+}

bench/glog-bench-mt.cpp

@@ -3,19 +3,23 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <atomic>
+#include <chrono>
+#include <iostream>
 #include <thread>
 #include <vector>
-#include <atomic>
 
 #include "glog/logging.h"
 
 using namespace std;
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
+    using namespace std::chrono;
+    using clock = steady_clock;
 
     int thread_count = 10;
-    if(argc > 1)
+    if (argc > 1)
         thread_count = atoi(argv[1]);
 
     int howmany = 1000000;
@@ -24,27 +28,36 @@ int main(int argc, char* argv[])
     FLAGS_log_dir = "logs";
     google::InitGoogleLogging(argv[0]);
 
-    std::atomic<int > msg_counter {0};
+    std::atomic<int> msg_counter{0};
     vector<thread> threads;
 
+    auto start = clock::now();
     for (int t = 0; t < thread_count; ++t)
     {
-        threads.push_back(std::thread([&]()
-        {
+        threads.push_back(std::thread([&]() {
             while (true)
             {
                 int counter = ++msg_counter;
-                if (counter > howmany) break;
+                if (counter > howmany)
+                    break;
                 LOG(INFO) << "glog message #" << counter << ": This is some text for your pleasure";
             }
         }));
     }
 
-
-    for(auto &t:threads)
+    for (auto &t : threads)
     {
         t.join();
-    };
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
 
     return 0;
 }

bench/glog-bench.cpp

@@ -3,19 +3,32 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <chrono>
+#include <iostream>
+
 #include "glog/logging.h"
 
-
-int main(int, char* argv[])
+int main(int, char *argv[])
 {
-    int howmany = 1000000;
+    using namespace std::chrono;
+    using clock = steady_clock;
 
+    int howmany = 1000000;
 
     FLAGS_logtostderr = 0;
     FLAGS_log_dir = "logs";
     google::InitGoogleLogging(argv[0]);
-    for(int i  = 0 ; i < howmany; ++i)
-        LOG(INFO) << "glog message # " << i << ": This is some text for your pleasure";
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
+        LOG(INFO) << "glog message #" << i << ": This is some text for your pleasure";
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
 
     return 0;
 }

bench/latency/Makefile

@@ -0,0 +1,32 @@
+CXX	?= g++
+CXXFLAGS	= -march=native -Wall -std=c++11 -pthread 
+CXX_RELEASE_FLAGS = -O2 -DNDEBUG
+
+
+binaries=spdlog-latency g3log-latency g3log-crush
+
+all: $(binaries)
+
+spdlog-latency: spdlog-latency.cpp
+	$(CXX) spdlog-latency.cpp -o spdlog-latency $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -I../../include
+
+
+
+g3log-latency: g3log-latency.cpp
+	$(CXX) g3log-latency.cpp -o g3log-latency $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -I../../../g3log/src -L. -lg3logger 
+		
+		
+g3log-crush: g3log-crush.cpp
+	$(CXX) g3log-crush.cpp -o g3log-crush $(CXXFLAGS) $(CXX_RELEASE_FLAGS) -I../../../g3log/src -L. -lg3logger 
+		
+	
+.PHONY: clean
+
+clean:
+	rm -f *.o  *.log $(binaries)
+
+
+rebuild: clean all
+
+
+

bench/latency/compare.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+echo "running spdlog and g3log tests 10 time with ${1:-10} threads each (total 1,000,000 entries).."
+rm -f *.log
+for i in {1..10}
+
+do
+   echo
+   sleep 0.5
+   ./spdlog-latency ${1:-10} 2>/dev/null || exit
+   sleep 0.5
+   ./g3log-latency ${1:-10} 2>/dev/null || exit
+
+done

bench/latency/g3log-crush.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+
+#include <g3log/g3log.hpp>
+#include <g3log/logworker.hpp>
+
+void CrusherLoop()
+{
+    size_t counter = 0;
+    while (true)
+    {
+        LOGF(INFO, "Some text to crush you machine. thread:");
+        if (++counter % 1000000 == 0)
+        {
+            std::cout << "Wrote " << counter << " entries" << std::endl;
+        }
+    }
+}
+
+int main(int argc, char **argv)
+{
+    std::cout << "WARNING: This test will exaust all your machine memory and will crush it!" << std::endl;
+    std::cout << "Are you sure you want to continue ? " << std::endl;
+    char c;
+    std::cin >> c;
+    if (toupper(c) != 'Y')
+        return 0;
+
+    auto worker = g3::LogWorker::createLogWorker();
+    auto handle = worker->addDefaultLogger(argv[0], "g3log.txt");
+    g3::initializeLogging(worker.get());
+    CrusherLoop();
+
+    return 0;
+}

bench/latency/g3log-latency.cpp

@@ -0,0 +1,118 @@
+#include "utils.h"
+#include <algorithm>
+#include <atomic>
+#include <chrono>
+#include <cstdio>
+#include <fstream>
+#include <functional>
+#include <g3log/g3log.hpp>
+#include <g3log/logworker.hpp>
+#include <iomanip>
+#include <iostream>
+#include <map>
+#include <numeric>
+#include <sstream>
+#include <thread>
+#include <vector>
+
+namespace {
+const uint64_t g_iterations = 1000000;
+
+std::atomic<size_t> g_counter = {0};
+
+void MeasurePeakDuringLogWrites(const size_t id, std::vector<uint64_t> &result)
+{
+
+    while (true)
+    {
+        const size_t value_now = ++g_counter;
+        if (value_now > g_iterations)
+        {
+            return;
+        }
+
+        auto start_time = std::chrono::high_resolution_clock::now();
+        LOGF(INFO, "Some text to log for thread: %ld", id);
+        auto stop_time = std::chrono::high_resolution_clock::now();
+        uint64_t time_us = std::chrono::duration_cast<std::chrono::microseconds>(stop_time - start_time).count();
+        result.push_back(time_us);
+    }
+}
+
+void PrintResults(const std::map<size_t, std::vector<uint64_t>> &threads_result, size_t total_us)
+{
+
+    std::vector<uint64_t> all_measurements;
+    all_measurements.reserve(g_iterations);
+    for (auto &t_result : threads_result)
+    {
+        all_measurements.insert(all_measurements.end(), t_result.second.begin(), t_result.second.end());
+    }
+
+    // calc worst latenct
+    auto worst = *std::max_element(all_measurements.begin(), all_measurements.end());
+
+    // calc avg
+    auto total = accumulate(begin(all_measurements), end(all_measurements), 0, std::plus<uint64_t>());
+    auto avg = double(total) / all_measurements.size();
+
+    std::cout << "[g3log]  worst: " << std::setw(10) << std::right << worst << "\tAvg: " << avg << "\tTotal: " << utils::format(total_us)
+              << " us" << std::endl;
+}
+} // namespace
+
+// The purpose of this test is NOT to see how fast
+// each thread can possibly write. It is to see what
+// the worst latency is for writing a log entry
+//
+// In the test 1 million log entries will be written
+// an atomic counter is used to give each thread what
+// it is to write next. The overhead of atomic
+// synchronization between the threads are not counted in the worst case latency
+int main(int argc, char **argv)
+{
+    size_t number_of_threads{0};
+    if (argc == 2)
+    {
+        number_of_threads = atoi(argv[1]);
+    }
+    if (argc != 2 || number_of_threads == 0)
+    {
+        std::cerr << "USAGE is: " << argv[0] << " number_threads" << std::endl;
+        return 1;
+    }
+
+    std::vector<std::thread> threads(number_of_threads);
+    std::map<size_t, std::vector<uint64_t>> threads_result;
+
+    for (size_t idx = 0; idx < number_of_threads; ++idx)
+    {
+        // reserve to 1 million for all the result
+        // it's a test so  let's not care about the wasted space
+        threads_result[idx].reserve(g_iterations);
+    }
+
+    const std::string g_path = "./";
+    const std::string g_prefix_log_name = "g3log-performance-";
+    const std::string g_measurement_dump = g_path + g_prefix_log_name + "_RESULT.txt";
+
+    auto worker = g3::LogWorker::createLogWorker();
+    auto handle = worker->addDefaultLogger(argv[0], "g3log.txt");
+    g3::initializeLogging(worker.get());
+
+    auto start_time_application_total = std::chrono::high_resolution_clock::now();
+    for (uint64_t idx = 0; idx < number_of_threads; ++idx)
+    {
+        threads[idx] = std::thread(MeasurePeakDuringLogWrites, idx, std::ref(threads_result[idx]));
+    }
+    for (size_t idx = 0; idx < number_of_threads; ++idx)
+    {
+        threads[idx].join();
+    }
+    auto stop_time_application_total = std::chrono::high_resolution_clock::now();
+
+    uint64_t total_time_in_us =
+        std::chrono::duration_cast<std::chrono::microseconds>(stop_time_application_total - start_time_application_total).count();
+    PrintResults(threads_result, total_time_in_us);
+    return 0;
+}

bench/latency/spdlog-latency.cpp

@@ -0,0 +1,119 @@
+
+#include "utils.h"
+#include <algorithm>
+#include <atomic>
+#include <chrono>
+#include <cstdio>
+#include <functional>
+#include <iostream>
+#include <map>
+#include <numeric>
+#include <thread>
+#include <vector>
+
+#include "spdlog/spdlog.h"
+
+namespace spd = spdlog;
+
+namespace {
+const uint64_t g_iterations = 1000000;
+
+std::atomic<size_t> g_counter = {0};
+
+void MeasurePeakDuringLogWrites(const size_t id, std::vector<uint64_t> &result)
+{
+    auto logger = spd::get("file_logger");
+    while (true)
+    {
+        const size_t value_now = ++g_counter;
+        if (value_now > g_iterations)
+        {
+            return;
+        }
+
+        auto start_time = std::chrono::high_resolution_clock::now();
+        logger->info("Some text to log for thread: [somemore text...............................] {}", id);
+        auto stop_time = std::chrono::high_resolution_clock::now();
+        uint64_t time_us = std::chrono::duration_cast<std::chrono::microseconds>(stop_time - start_time).count();
+        result.push_back(time_us);
+    }
+}
+
+void PrintResults(const std::map<size_t, std::vector<uint64_t>> &threads_result, size_t total_us)
+{
+
+    std::vector<uint64_t> all_measurements;
+    all_measurements.reserve(g_iterations);
+    for (auto &t_result : threads_result)
+    {
+        all_measurements.insert(all_measurements.end(), t_result.second.begin(), t_result.second.end());
+    }
+
+    // calc worst latenct
+    auto worst = *std::max_element(all_measurements.begin(), all_measurements.end());
+
+    // calc avg
+    auto total = accumulate(begin(all_measurements), end(all_measurements), 0, std::plus<uint64_t>());
+    auto avg = double(total) / all_measurements.size();
+
+    std::cout << "[spdlog] worst: " << std::setw(10) << std::right << worst << "\tAvg: " << avg << "\tTotal: " << utils::format(total_us)
+              << " us" << std::endl;
+}
+} // namespace
+
+// The purpose of this test is NOT to see how fast
+// each thread can possibly write. It is to see what
+// the worst latency is for writing a log entry
+//
+// In the test 1 million log entries will be written
+// an atomic counter is used to give each thread what
+// it is to write next. The overhead of atomic
+// synchronization between the threads are not counted in the worst case latency
+int main(int argc, char **argv)
+{
+    size_t number_of_threads{0};
+    if (argc == 2)
+    {
+        number_of_threads = atoi(argv[1]);
+    }
+    if (argc != 2 || number_of_threads == 0)
+    {
+        std::cerr << "usage: " << argv[0] << " number_threads" << std::endl;
+        return 1;
+    }
+
+    std::vector<std::thread> threads(number_of_threads);
+    std::map<size_t, std::vector<uint64_t>> threads_result;
+
+    for (size_t idx = 0; idx < number_of_threads; ++idx)
+    {
+        // reserve to 1 million for all the result
+        // it's a test so  let's not care about the wasted space
+        threads_result[idx].reserve(g_iterations);
+    }
+
+    int queue_size = 1048576; // 2 ^ 20
+    spdlog::set_async_mode(queue_size);
+    auto logger = spdlog::create<spd::sinks::simple_file_sink_mt>("file_logger", "spdlog.log", true);
+
+    // force flush on every call to compare with g3log
+    auto s = (spd::sinks::simple_file_sink_mt *)logger->sinks()[0].get();
+    s->set_force_flush(true);
+
+    auto start_time_application_total = std::chrono::high_resolution_clock::now();
+    for (uint64_t idx = 0; idx < number_of_threads; ++idx)
+    {
+        threads[idx] = std::thread(MeasurePeakDuringLogWrites, idx, std::ref(threads_result[idx]));
+    }
+    for (size_t idx = 0; idx < number_of_threads; ++idx)
+    {
+        threads[idx].join();
+    }
+    auto stop_time_application_total = std::chrono::high_resolution_clock::now();
+
+    uint64_t total_time_in_us =
+        std::chrono::duration_cast<std::chrono::microseconds>(stop_time_application_total - start_time_application_total).count();
+
+    PrintResults(threads_result, total_time_in_us);
+    return 0;
+}

bench/latency/utils.h

@@ -0,0 +1,34 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include <iomanip>
+#include <locale>
+#include <sstream>
+
+namespace utils {
+
+template<typename T>
+inline std::string format(const T &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << value;
+    return ss.str();
+}
+
+template<>
+inline std::string format(const double &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << std::fixed << std::setprecision(1) << value;
+    return ss.str();
+}
+
+} // namespace utils

bench/log4cplus-bench-mt.cpp

@@ -0,0 +1,78 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <atomic>
+#include <chrono>
+#include <iostream>
+#include <memory>
+#include <thread>
+#include <vector>
+
+#include "log4cplus/fileappender.h"
+#include "log4cplus/helpers/loglog.h"
+#include "log4cplus/helpers/property.h"
+#include "log4cplus/layout.h"
+#include "log4cplus/logger.h"
+#include "log4cplus/loggingmacros.h"
+#include "log4cplus/ndc.h"
+
+using namespace log4cplus;
+
+int main(int argc, char *argv[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int thread_count = 10;
+    if (argc > 1)
+        thread_count = std::atoi(argv[1]);
+
+    int howmany = 1000000;
+
+    log4cplus::initialize();
+    SharedFileAppenderPtr append(new FileAppender(LOG4CPLUS_TEXT("logs/log4cplus-bench-mt.log"), std::ios_base::trunc, true, true));
+    append->setName(LOG4CPLUS_TEXT("File"));
+
+    log4cplus::tstring pattern = LOG4CPLUS_TEXT("%d{%Y-%m-%d %H:%M:%S.%Q}: %p - %m %n");
+    append->setLayout(std::auto_ptr<Layout>(new PatternLayout(pattern)));
+    append->getloc();
+    Logger::getRoot().addAppender(SharedAppenderPtr(append.get()));
+
+    Logger root = Logger::getRoot();
+
+    std::atomic<int> msg_counter{0};
+    std::vector<std::thread> threads;
+
+    auto start = clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            while (true)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                LOG4CPLUS_INFO(root, "log4cplus message #" << counter << ": This is some text for your pleasure");
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    log4cplus::Logger::shutdown();
+    return 0;
+}

bench/log4cplus-bench.cpp

@@ -0,0 +1,52 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <chrono>
+#include <iostream>
+#include <memory>
+
+#include "log4cplus/fileappender.h"
+#include "log4cplus/helpers/loglog.h"
+#include "log4cplus/helpers/property.h"
+#include "log4cplus/layout.h"
+#include "log4cplus/logger.h"
+#include "log4cplus/loggingmacros.h"
+#include "log4cplus/ndc.h"
+
+using namespace log4cplus;
+
+int main(int, char *[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int howmany = 1000000;
+
+    log4cplus::initialize();
+    SharedFileAppenderPtr append(new FileAppender(LOG4CPLUS_TEXT("logs/log4cplus-bench.log"), std::ios_base::trunc, true, true));
+    append->setName(LOG4CPLUS_TEXT("File"));
+
+    log4cplus::tstring pattern = LOG4CPLUS_TEXT("%d{%Y-%m-%d %H:%M:%S.%Q}: %p - %m %n");
+    append->setLayout(std::auto_ptr<Layout>(new PatternLayout(pattern)));
+    append->getloc();
+    Logger::getRoot().addAppender(SharedAppenderPtr(append.get()));
+
+    Logger root = Logger::getRoot();
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
+        LOG4CPLUS_INFO(root, "log4cplus message #" << i << ": This is some text for your pleasure");
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    log4cplus::Logger::shutdown();
+    return 0;
+}

bench/log4cpp-bench-mt.cpp

@@ -0,0 +1,74 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <atomic>
+#include <chrono>
+#include <iostream>
+#include <memory>
+#include <thread>
+#include <vector>
+
+#include "log4cpp/Appender.hh"
+#include "log4cpp/BasicLayout.hh"
+#include "log4cpp/Category.hh"
+#include "log4cpp/FileAppender.hh"
+#include "log4cpp/Layout.hh"
+#include "log4cpp/PatternLayout.hh"
+#include "log4cpp/Priority.hh"
+
+int main(int argc, char *argv[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int thread_count = 10;
+    if (argc > 1)
+        thread_count = std::atoi(argv[1]);
+
+    int howmany = 1000000;
+
+    log4cpp::Appender *appender = new log4cpp::FileAppender("default", "logs/log4cpp-bench-mt.log");
+    log4cpp::PatternLayout *layout = new log4cpp::PatternLayout();
+    layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S.%l}: %p - %m %n");
+    appender->setLayout(layout);
+
+    log4cpp::Category &root = log4cpp::Category::getRoot();
+    root.addAppender(appender);
+    root.setPriority(log4cpp::Priority::INFO);
+
+    std::atomic<int> msg_counter{0};
+    std::vector<std::thread> threads;
+
+    auto start = clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            while (true)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                root << log4cpp::Priority::INFO << "log4cpp message #" << counter << ": This is some text for your pleasure";
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    root.shutdown();
+    return 0;
+}

bench/log4cpp-bench.cpp

@@ -0,0 +1,48 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <chrono>
+#include <iostream>
+#include <memory>
+
+#include "log4cpp/Appender.hh"
+#include "log4cpp/BasicLayout.hh"
+#include "log4cpp/Category.hh"
+#include "log4cpp/FileAppender.hh"
+#include "log4cpp/Layout.hh"
+#include "log4cpp/PatternLayout.hh"
+#include "log4cpp/Priority.hh"
+
+int main(int, char *[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int howmany = 1000000;
+
+    log4cpp::Appender *appender = new log4cpp::FileAppender("default", "logs/log4cpp-bench.log");
+    log4cpp::PatternLayout *layout = new log4cpp::PatternLayout();
+    layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S.%l}: %p - %m %n");
+    appender->setLayout(layout);
+
+    log4cpp::Category &root = log4cpp::Category::getRoot();
+    root.addAppender(appender);
+    root.setPriority(log4cpp::Priority::INFO);
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
+        root << log4cpp::Priority::INFO << "log4cpp message #" << i << ": This is some text for your pleasure";
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    root.shutdown();
+    return 0;
+}

bench/mem

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+  echo "usage: $0 <program>"
+fi
+
+PROG=$1
+
+if [ ! -x "$PROG" ]; then
+  echo $PROG not found or not executable.
+  exit 1
+fi
+
+$* &
+PID=$!
+
+while `kill -0 $PID 2>/dev/null`; do
+  ps -eo size,pid,user,pcpu,command --sort -size | awk '{ line=1 ; hr=$1/1024 ; printf("%13.2f Mb ",hr); } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | grep -v grep | grep -v $0 | grep $PROG
+done

bench/p7-bench-mt.cpp

@@ -0,0 +1,94 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <atomic>
+#include <chrono>
+#include <functional>
+#include <iostream>
+#include <memory>
+#include <thread>
+#include <vector>
+
+#include "P7_Trace.h"
+
+int main(int argc, char *argv[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int thread_count = 10;
+    if (argc > 1)
+        thread_count = std::atoi(argv[1]);
+
+    int howmany = 1000000;
+
+    IP7_Trace::hModule module = NULL;
+
+    // create P7 client object
+    std::unique_ptr<IP7_Client, std::function<void(IP7_Client *)>> client(
+        P7_Create_Client(TM("/P7.Pool=1024 /P7.Sink=FileTxt /P7.Dir=logs/p7-bench-mt")), [&](IP7_Client *ptr) {
+            if (ptr)
+                ptr->Release();
+        });
+
+    if (!client)
+    {
+        std::cout << "Can't create IP7_Client" << std::endl;
+        return 1;
+    }
+
+    // create P7 trace object 1
+    std::unique_ptr<IP7_Trace, std::function<void(IP7_Trace *)>> trace(
+        P7_Create_Trace(client.get(), TM("Trace channel 1")), [&](IP7_Trace *ptr) {
+            if (ptr)
+                ptr->Release();
+        });
+
+    if (!trace)
+    {
+        std::cout << "Can't create IP7_Trace" << std::endl;
+        return 1;
+    }
+
+    trace->Register_Thread(TM("Application"), 0);
+    trace->Register_Module(TM("Main"), &module);
+
+    std::atomic<int> msg_counter{0};
+    std::vector<std::thread> threads;
+
+    auto start = clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            trace->Register_Thread(TM("Application"), t + 1);
+            while (true)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                trace->P7_INFO(module, TM("p7 message #%d: This is some text for your pleasure"), counter);
+            }
+            trace->Register_Thread(TM("Application"), t + 1);
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    trace->Unregister_Thread(0);
+
+    return 0;
+}

bench/p7-bench.cpp

@@ -0,0 +1,66 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <chrono>
+#include <functional>
+#include <iostream>
+#include <memory>
+
+#include "P7_Trace.h"
+
+int main(int, char *[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int howmany = 1000000;
+
+    IP7_Trace::hModule module = NULL;
+
+    // create P7 client object
+    std::unique_ptr<IP7_Client, std::function<void(IP7_Client *)>> client(
+        P7_Create_Client(TM("/P7.Pool=1024 /P7.Sink=FileTxt /P7.Dir=logs/p7-bench")), [&](IP7_Client *ptr) {
+            if (ptr)
+                ptr->Release();
+        });
+
+    if (!client)
+    {
+        std::cout << "Can't create IP7_Client" << std::endl;
+        return 1;
+    }
+
+    // create P7 trace object 1
+    std::unique_ptr<IP7_Trace, std::function<void(IP7_Trace *)>> trace(
+        P7_Create_Trace(client.get(), TM("Trace channel 1")), [&](IP7_Trace *ptr) {
+            if (ptr)
+                ptr->Release();
+        });
+
+    if (!trace)
+    {
+        std::cout << "Can't create IP7_Trace" << std::endl;
+        return 1;
+    }
+
+    trace->Register_Thread(TM("Application"), 0);
+    trace->Register_Module(TM("Main"), &module);
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
+        trace->P7_INFO(module, TM("p7 message #%d: This is some text for your pleasure"), i);
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    trace->Unregister_Thread(0);
+
+    return 0;
+}

bench/plog-bench-mt.cpp

@@ -0,0 +1,61 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <atomic>
+#include <chrono>
+#include <iostream>
+#include <thread>
+#include <vector>
+
+#include "plog/Log.h"
+
+using namespace std;
+
+int main(int argc, char *argv[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int thread_count = 10;
+    if (argc > 1)
+        thread_count = atoi(argv[1]);
+
+    int howmany = 1000000;
+
+    plog::init(plog::debug, "logs/plog-bench-mt.log");
+
+    std::atomic<int> msg_counter{0};
+    vector<thread> threads;
+
+    auto start = clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            while (true)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                LOG_INFO << "plog message #" << counter << ": This is some text for your pleasure";
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    return 0;
+}

bench/plog-bench.cpp

@@ -0,0 +1,34 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include <chrono>
+#include <iostream>
+#include <memory>
+
+#include "plog/Log.h"
+
+int main(int, char *[])
+{
+    using namespace std::chrono;
+    using clock = steady_clock;
+
+    int howmany = 1000000;
+
+    plog::init(plog::debug, "logs/plog-bench.log");
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
+        LOG_INFO << "plog message #" << i << ": This is some text for your pleasure";
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << rate << "/sec" << std::endl;
+
+    return 0;
+}

bench/spdlog-async.cpp

@@ -3,60 +3,74 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
-#include <thread>
-#include <vector>
 #include <atomic>
-#include <iostream>
 #include <chrono>
 #include <cstdlib>
+#include <iostream>
+#include <thread>
+#include <vector>
+
 #include "spdlog/spdlog.h"
 
 using namespace std;
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
-
     using namespace std::chrono;
-    using clock=steady_clock;
-    namespace spd = spdlog;
+    using clock = steady_clock;
 
     int thread_count = 10;
-    if(argc > 1)
-        thread_count = ::atoi(argv[1]);
+    if (argc > 1)
+        thread_count = std::atoi(argv[1]);
+
     int howmany = 1000000;
 
-    spd::set_async_mode(1048576);
-    auto logger = spdlog::create<spd::sinks::simple_file_sink_mt>("file_logger", "logs/spd-bench-async.txt", false);
-    logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
+    spdlog::set_async_mode(1000000);
+    auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("file_logger", "logs/spdlog-bench-async.log", true);
+    logger->set_pattern("[%Y-%m-%d %T.%F]: %L %t %v");
 
+    std::cout << "To stop, press <Enter>" << std::endl;
+    std::atomic<bool> run{true};
+    std::thread stoper(std::thread([&run]() {
+        std::cin.get();
+        run = false;
+    }));
 
-    std::atomic<int > msg_counter {0};
-    vector<thread> threads;
-    auto start = clock::now();
-    for (int t = 0; t < thread_count; ++t)
+    while (run)
     {
-        threads.push_back(std::thread([&]()
+        std::atomic<int> msg_counter{0};
+        std::vector<std::thread> threads;
+
+        auto start = clock::now();
+        for (int t = 0; t < thread_count; ++t)
         {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany) break;
-                logger->info("spdlog message #{}: This is some text for your pleasure", counter);
-            }
-        }));
-    }
+            threads.push_back(std::thread([&]() {
+                while (true)
+                {
+                    int counter = ++msg_counter;
+                    if (counter > howmany)
+                        break;
+                    logger->info("spdlog message #{}: This is some text for your pleasure", counter);
+                }
+            }));
+        }
 
-    for(auto &t:threads)
-    {
-        t.join();
-    };
+        for (auto &t : threads)
+        {
+            t.join();
+        }
 
-    duration<float> delta = clock::now() - start;
-    float deltaf = delta.count();
-    auto rate = howmany/deltaf;
+        duration<float> delta = clock::now() - start;
+        float deltaf = delta.count();
+        auto rate = howmany / deltaf;
 
-    cout << "Total: " << howmany << std::endl;
-    cout << "Threads: " << thread_count << std::endl;
-    std::cout << "Delta = " << deltaf << " seconds" << std::endl;
-    std::cout << "Rate = " << rate << "/sec" << std::endl;
+        std::cout << "Total: " << howmany << std::endl;
+        std::cout << "Threads: " << thread_count << std::endl;
+        std::cout << "Delta = " << std::fixed << deltaf << " seconds" << std::endl;
+        std::cout << "Rate = " << std::fixed << rate << "/sec" << std::endl;
+    } // while
+
+    stoper.join();
+
+    return 0;
 }

bench/spdlog-bench-mt.cpp

@@ -3,53 +3,61 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <atomic>
+#include <chrono>
+#include <cstdlib>
+#include <iostream>
 #include <thread>
 #include <vector>
-#include <atomic>
-#include <cstdlib>
-#include "spdlog/spdlog.h"
 
+#include "spdlog/spdlog.h"
 
 using namespace std;
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
+    using namespace std::chrono;
+    using clock = steady_clock;
 
     int thread_count = 10;
-    if(argc > 1)
+    if (argc > 1)
         thread_count = std::atoi(argv[1]);
 
     int howmany = 1000000;
 
-    namespace spd = spdlog;
+    auto logger = spdlog::create<spdlog::sinks::simple_file_sink_mt>("file_logger", "logs/spdlog-bench-mt.log", false);
+    logger->set_pattern("[%Y-%m-%d %T.%F]: %L %t %v");
 
-    auto logger = spdlog::create<spd::sinks::simple_file_sink_mt>("file_logger", "logs/spd-bench-mt.txt", false);
-
-    logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
-
-    std::atomic<int > msg_counter {0};
-    vector<thread> threads;
+    std::atomic<int> msg_counter{0};
+    std::vector<thread> threads;
 
+    auto start = clock::now();
     for (int t = 0; t < thread_count; ++t)
     {
-        threads.push_back(std::thread([&]()
-        {
+        threads.push_back(std::thread([&]() {
             while (true)
             {
                 int counter = ++msg_counter;
-                if (counter > howmany) break;
+                if (counter > howmany)
+                    break;
                 logger->info("spdlog message #{}: This is some text for your pleasure", counter);
             }
         }));
     }
 
-
-    for(auto &t:threads)
+    for (auto &t : threads)
     {
         t.join();
-    };
+    }
 
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
 
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Threads: " << thread_count << std::endl;
+    std::cout << "Delta = " << std::fixed << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << std::fixed << rate << "/sec" << std::endl;
 
     return 0;
 }

bench/spdlog-bench.cpp

@@ -3,18 +3,32 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
+#include <chrono>
+#include <iostream>
+
 #include "spdlog/spdlog.h"
 
-
-int main(int, char* [])
+int main(int, char *[])
 {
-    int howmany = 1000000;
-    namespace spd = spdlog;
-    ///Create a file rotating logger with 5mb size max and 3 rotated files
-    auto logger = spdlog::create<spd::sinks::simple_file_sink_st>("file_logger", "logs/spd-bench-st.txt", false);
+    using namespace std::chrono;
+    using clock = steady_clock;
 
-    logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
-    for(int i  = 0 ; i < howmany; ++i)
+    int howmany = 1000000;
+
+    auto logger = spdlog::create<spdlog::sinks::simple_file_sink_st>("file_logger", "logs/spdlog-bench.log", false);
+    logger->set_pattern("[%Y-%m-%d %T.%F]: %L %v");
+
+    auto start = clock::now();
+    for (int i = 0; i < howmany; ++i)
         logger->info("spdlog message #{} : This is some text for your pleasure", i);
+
+    duration<float> delta = clock::now() - start;
+    float deltaf = delta.count();
+    auto rate = howmany / deltaf;
+
+    std::cout << "Total: " << howmany << std::endl;
+    std::cout << "Delta = " << std::fixed << deltaf << " seconds" << std::endl;
+    std::cout << "Rate = " << std::fixed << rate << "/sec" << std::endl;
+
     return 0;
 }

bench/spdlog-null-async.cpp

@@ -0,0 +1,103 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/async_logger.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/spdlog.h"
+#include "utils.h"
+#include <atomic>
+#include <cstdlib> // EXIT_FAILURE
+#include <iostream>
+#include <memory>
+#include <string>
+#include <thread>
+
+using namespace std;
+using namespace std::chrono;
+using namespace spdlog;
+using namespace spdlog::sinks;
+using namespace utils;
+
+size_t bench_as(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
+
+int main(int argc, char *argv[])
+{
+
+    int queue_size = 1048576;
+    int howmany = 1000000;
+    int threads = 10;
+    int iters = 10;
+
+    try
+    {
+
+        if (argc > 1)
+            howmany = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
+        if (argc > 3)
+            queue_size = atoi(argv[3]);
+
+        cout << "\n*******************************************************************************\n";
+        cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " messages " << endl;
+        cout << "*******************************************************************************\n";
+
+        spdlog::set_async_mode(queue_size);
+
+        size_t total_rate = 0;
+
+        for (int i = 0; i < iters; ++i)
+        {
+            // auto as = spdlog::daily_logger_st("as", "logs/daily_async");
+            auto as = spdlog::create<null_sink_st>("async(null-sink)");
+            total_rate += bench_as(howmany, as, threads);
+            spdlog::drop("async(null-sink)");
+        }
+        std::cout << endl;
+        std::cout << "Avg rate: " << format(total_rate / iters) << "/sec" << std::endl;
+    }
+    catch (std::exception &ex)
+    {
+        std::cerr << "Error: " << ex.what() << std::endl;
+        perror("Last error");
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
+
+// return rate/sec
+size_t bench_as(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
+{
+    cout << log->name() << "...\t\t" << flush;
+    std::atomic<int> msg_counter{0};
+    vector<thread> threads;
+    auto start = system_clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            for (;;)
+            {
+                int counter = ++msg_counter;
+                if (counter > howmany)
+                    break;
+                log->info("Hello logger: msg number {}", counter);
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    }
+
+    auto delta = system_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    auto per_sec = size_t(howmany / delta_d);
+    cout << format(per_sec) << "/sec" << endl;
+    return per_sec;
+}

bench/utils.h

@@ -0,0 +1,34 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include <iomanip>
+#include <locale>
+#include <sstream>
+
+namespace utils {
+
+template<typename T>
+inline std::string format(const T &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << value;
+    return ss.str();
+}
+
+template<>
+inline std::string format(const double &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << std::fixed << std::setprecision(1) << value;
+    return ss.str();
+}
+
+} // namespace utils

bench/zf_log-bench-mt.cpp

@@ -1,56 +0,0 @@
-#include <thread>
-#include <vector>
-#include <atomic>
-#include <cstdlib>
-#include <unistd.h>
-#include <fcntl.h>
-#include <zf_log.c>
-
-const char g_path[] = "logs/zf_log.txt";
-int g_fd;
-
-static void output_callback(zf_log_message *msg)
-{
-    *msg->p = '\n';
-    write(g_fd, msg->buf, msg->p - msg->buf + 1);
-}
-
-using namespace std;
-
-int main(int argc, char* argv[])
-{
-    g_fd = open(g_path, O_APPEND|O_CREAT|O_WRONLY);
-    if (0 > g_fd)
-    {
-        ZF_LOGE_AUX(ZF_LOG_STDERR, "Failed to open log file: %s", g_path);
-        return -1;
-    }
-    zf_log_set_output_callback(ZF_LOG_PUT_STD, output_callback);
-
-    int thread_count = 10;
-    if(argc > 1)
-        thread_count = std::atoi(argv[1]);
-    int howmany = 1000000;
-    std::atomic<int > msg_counter {0};
-    vector<thread> threads;
-
-    for (int t = 0; t < thread_count; ++t)
-    {
-        threads.push_back(std::thread([&]()
-        {
-            while (true)
-            {
-                int counter = ++msg_counter;
-                if (counter > howmany) break;
-                ZF_LOGI("zf_log message #%i: This is some text for your pleasure", counter);
-            }
-        }));
-    }
-
-    for (auto &t:threads)
-    {
-        t.join();
-    };
-    close(g_fd);
-    return 0;
-}

bench/zf_log-bench.cpp

@@ -1,28 +0,0 @@
-#include <stdio.h>
-#include <zf_log.c>
-
-const char g_path[] = "logs/zf_log.txt";
-static FILE *g_f;
-
-static void output_callback(zf_log_message *msg)
-{
-    *msg->p = '\n';
-    fwrite(msg->buf, msg->p - msg->buf + 1, 1, g_f);
-}
-
-int main(int, char* [])
-{
-    g_f = fopen(g_path, "wb");
-    if (!g_f)
-    {
-        ZF_LOGE_AUX(ZF_LOG_STDERR, "Failed to open log file: %s", g_path);
-        return -1;
-    }
-    zf_log_set_output_callback(ZF_LOG_PUT_STD, output_callback);
-
-    const int howmany = 1000000;
-    for(int i  = 0 ; i < howmany; ++i)
-        ZF_LOGI("zf_log message #%i: This is some text for your pleasure", i);
-    fclose(g_f);
-    return 0;
-}

example/CMakeLists.txt

@@ -1,46 +1,49 @@
-# *************************************************************************/
-# * Copyright (c) 2015 Ruslan Baratov.                                    */
-# *                                                                       */
-# * Permission is hereby granted, free of charge, to any person obtaining */
-# * a copy of this software and associated documentation files (the       */
-# * "Software"), to deal in the Software without restriction, including   */
-# * without limitation the rights to use, copy, modify, merge, publish,   */
-# * distribute, sublicense, and/or sell copies of the Software, and to    */
-# * permit persons to whom the Software is furnished to do so, subject to */
-# * the following conditions:                                             */
-# *                                                                       */
-# * The above copyright notice and this permission notice shall be        */
-# * included in all copies or substantial portions of the Software.       */
-# *                                                                       */
-# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-# *************************************************************************/
-
-cmake_minimum_required(VERSION 3.0)
-project(SpdlogExamples)
-
-if(TARGET spdlog)
-  # Part of the main project
-  add_library(spdlog::spdlog ALIAS spdlog)
-else()
-  # Stand-alone build
-  find_package(spdlog CONFIG REQUIRED)
-endif()
-
-find_package(Threads)
-
-add_executable(example example.cpp)
-target_link_libraries(example spdlog::spdlog ${CMAKE_THREAD_LIBS_INIT})
-
-add_executable(benchmark bench.cpp)
-target_link_libraries(benchmark spdlog::spdlog ${CMAKE_THREAD_LIBS_INIT})
-
-enable_testing()
-file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
-add_test(NAME RunExample COMMAND example)
-add_test(NAME RunBenchmark COMMAND benchmark)
+# *************************************************************************/
+# * Copyright (c) 2015 Ruslan Baratov.                                    */
+# *                                                                       */
+# * Permission is hereby granted, free of charge, to any person obtaining */
+# * a copy of this software and associated documentation files (the       */
+# * "Software"), to deal in the Software without restriction, including   */
+# * without limitation the rights to use, copy, modify, merge, publish,   */
+# * distribute, sublicense, and/or sell copies of the Software, and to    */
+# * permit persons to whom the Software is furnished to do so, subject to */
+# * the following conditions:                                             */
+# *                                                                       */
+# * The above copyright notice and this permission notice shall be        */
+# * included in all copies or substantial portions of the Software.       */
+# *                                                                       */
+# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+# *************************************************************************/
+
+cmake_minimum_required(VERSION 3.1)
+project(SpdlogExamples CXX)
+
+if(TARGET spdlog)
+  # Part of the main project
+  add_library(spdlog::spdlog ALIAS spdlog)
+else()
+  # Stand-alone build
+  find_package(spdlog CONFIG REQUIRED)
+endif()
+
+find_package(Threads REQUIRED)
+
+add_executable(example example.cpp)
+target_link_libraries(example spdlog::spdlog Threads::Threads)
+
+add_executable(benchmark bench.cpp)
+target_link_libraries(benchmark spdlog::spdlog Threads::Threads)
+
+add_executable(multisink multisink.cpp)
+target_link_libraries(multisink spdlog::spdlog Threads::Threads)
+
+enable_testing()
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
+add_test(NAME RunExample COMMAND example)
+add_test(NAME RunBenchmark COMMAND benchmark)

example/Makefile

@@ -1,29 +1,29 @@
-CXX	?= g++
-CXXFLAGS	=
-CXX_FLAGS = -Wall -Wshadow -Wextra -pedantic -std=c++11 -pthread -I../include
-CXX_RELEASE_FLAGS = -O3 -march=native
-CXX_DEBUG_FLAGS= -g
-
-
-all:	example bench
-debug:	example-debug bench-debug
-
-example: example.cpp
-	$(CXX) example.cpp -o example $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
-
-
-example-debug: example.cpp
-	$(CXX) example.cpp -o example-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
-
-bench-debug: bench.cpp
-	$(CXX) bench.cpp -o bench-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
-
-clean:
-	rm -f *.o logs/*.txt example example-debug bench bench-debug
-
-
-rebuild: clean all
-rebuild-debug: clean debug
+CXX	?= g++
+CXXFLAGS	=
+CXX_FLAGS = -Wall -Wshadow -Wextra -pedantic -std=c++11 -pthread -I../include
+CXX_RELEASE_FLAGS = -O3 -march=native
+CXX_DEBUG_FLAGS= -g
+
+
+all:	example bench
+debug:	example-debug bench-debug
+
+example: example.cpp
+	$(CXX) example.cpp -o example $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
+
+bench: bench.cpp
+	$(CXX) bench.cpp -o bench $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
+
+
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
+
+bench-debug: bench.cpp
+	$(CXX) bench.cpp -o bench-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
+
+clean:
+	rm -f *.o logs/*.txt example example-debug bench bench-debug
+
+
+rebuild: clean all
+rebuild-debug: clean debug

example/Makefile.clang

@@ -1,32 +1,32 @@
-CXX	?= clang++
-CXXFLAGS	= -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -I../include
-CXX_RELEASE_FLAGS = -O2
-CXX_DEBUG_FLAGS= -g 
-
-
-all:	example bench
-debug: example-debug bench-debug
-
-example: example.cpp
-	$(CXX) example.cpp -o example-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-example-debug: example.cpp
-	$(CXX) example.cpp -o example-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
-	
-bench-debug: bench.cpp
-	$(CXX) bench.cpp -o bench-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)	
-
-
-
-clean:
-	rm -f *.o logs/*.txt example-clang example-clang-debug bench-clang bench-clang-debug 
-
-
-rebuild: clean all
-rebuild-debug: clean debug
-
-
+CXX	= clang++
+CXXFLAGS	= -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -I../include
+CXX_RELEASE_FLAGS = -O2
+CXX_DEBUG_FLAGS= -g 
+
+
+all:	example bench
+debug: example-debug bench-debug
+
+example: example.cpp
+	$(CXX) example.cpp -o example-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
+
+bench: bench.cpp
+	$(CXX) bench.cpp -o bench-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
+	
+
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
+	
+bench-debug: bench.cpp
+	$(CXX) bench.cpp -o bench-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)	
+
+
+
+clean:
+	rm -f *.o logs/*.txt example-clang example-clang-debug bench-clang bench-clang-debug 
+
+
+rebuild: clean all
+rebuild-debug: clean debug
+
+

example/Makefile.mingw

@@ -1,32 +1,32 @@
-CXX	?= g++
-CXXFLAGS	=  -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -Wl,--no-as-needed  -I../include 
-CXX_RELEASE_FLAGS = -O3 
-CXX_DEBUG_FLAGS= -g 
-
-
-all:	example bench
-debug: example-debug bench-debug
-
-example: example.cpp
-	$(CXX) example.cpp -o example $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-
-bench: bench.cpp
-	$(CXX) bench.cpp -o bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-example-debug: example.cpp
-	$(CXX) example.cpp -o example-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
-	
-bench-debug: bench.cpp
-	$(CXX) bench.cpp -o bench-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)	
-
-
-
-clean:
-	rm -f *.o logs/*.txt example example-debug bench bench-debug 
-
-
-rebuild: clean all
-rebuild-debug: clean debug
-
-
+CXX	?= g++
+CXXFLAGS	=  -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -Wshadow -pedantic -std=gnu++0x -pthread -Wl,--no-as-needed  -I../include 
+CXX_RELEASE_FLAGS = -O3 
+CXX_DEBUG_FLAGS= -g 
+
+
+all:	example bench
+debug: example-debug bench-debug
+
+example: example.cpp
+	$(CXX) example.cpp -o example $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
+
+bench: bench.cpp
+	$(CXX) bench.cpp -o bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
+	
+
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
+	
+bench-debug: bench.cpp
+	$(CXX) bench.cpp -o bench-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)	
+
+
+
+clean:
+	rm -f *.o logs/*.txt example example-debug bench bench-debug 
+
+
+rebuild: clean all
+rebuild-debug: clean debug
+
+

example/bench.cpp

@@ -6,18 +6,17 @@
 //
 // bench.cpp : spdlog benchmarks
 //
+#include "spdlog/async_logger.h"
+#include "spdlog/sinks/file_sinks.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/spdlog.h"
+#include "utils.h"
 #include <atomic>
 #include <cstdlib> // EXIT_FAILURE
 #include <iostream>
 #include <memory>
 #include <string>
 #include <thread>
-#include "spdlog/spdlog.h"
-#include "spdlog/async_logger.h"
-#include "spdlog/sinks/file_sinks.h"
-#include "spdlog/sinks/null_sink.h"
-#include "utils.h"
-
 
 using namespace std;
 using namespace std::chrono;
@@ -25,63 +24,58 @@ using namespace spdlog;
 using namespace spdlog::sinks;
 using namespace utils;
 
-
 void bench(int howmany, std::shared_ptr<spdlog::logger> log);
 void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
 
     int queue_size = 1048576;
     int howmany = 1000000;
     int threads = 10;
-    bool auto_flush = false;
     int file_size = 30 * 1024 * 1024;
     int rotating_files = 5;
 
     try
     {
 
-        if(argc > 1)
+        if (argc > 1)
             howmany = atoi(argv[1]);
         if (argc > 2)
-            threads =   atoi(argv[2]);
+            threads = atoi(argv[2]);
         if (argc > 3)
             queue_size = atoi(argv[3]);
 
-
         cout << "*******************************************************************************\n";
-        cout << "Single thread, " << format(howmany)  << " iterations, auto flush=" << auto_flush << endl;
+        cout << "Single thread, " << format(howmany) << " iterations" << endl;
         cout << "*******************************************************************************\n";
 
-        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st", file_size, rotating_files, auto_flush);
+        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
         bench(howmany, rotating_st);
-        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st", auto_flush);
+        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
         bench(howmany, daily_st);
         bench(howmany, spdlog::create<null_sink_st>("null_st"));
 
         cout << "\n*******************************************************************************\n";
-        cout << threads << " threads sharing same logger, " << format(howmany)  << " iterations, auto_flush=" << auto_flush << endl;
+        cout << threads << " threads sharing same logger, " << format(howmany) << " iterations" << endl;
         cout << "*******************************************************************************\n";
 
-        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt", file_size, rotating_files, auto_flush);
+        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
         bench_mt(howmany, rotating_mt, threads);
 
-
-        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt", auto_flush);
+        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
         bench_mt(howmany, daily_mt, threads);
         bench(howmany, spdlog::create<null_sink_st>("null_mt"));
 
         cout << "\n*******************************************************************************\n";
-        cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " iterations, auto_flush=" << auto_flush << endl;
+        cout << "async logging.. " << threads << " threads sharing same logger, " << format(howmany) << " iterations " << endl;
         cout << "*******************************************************************************\n";
 
-
         spdlog::set_async_mode(queue_size);
 
-        for(int i = 0; i < 3; ++i)
+        for (int i = 0; i < 3; ++i)
         {
-            auto as = spdlog::daily_logger_st("as", "logs/daily_async", auto_flush);
+            auto as = spdlog::daily_logger_st("as", "logs/daily_async.log");
             bench_mt(howmany, as, threads);
             spdlog::drop("as");
         }
@@ -95,7 +89,6 @@ int main(int argc, char* argv[])
     return EXIT_SUCCESS;
 }
 
-
 void bench(int howmany, std::shared_ptr<spdlog::logger> log)
 {
     cout << log->name() << "...\t\t" << flush;
@@ -105,41 +98,37 @@ void bench(int howmany, std::shared_ptr<spdlog::logger> log)
         log->info("Hello logger: msg number {}", i);
     }
 
-
     auto delta = system_clock::now() - start;
-    auto delta_d = duration_cast<duration<double>> (delta).count();
-    cout << format(int(howmany / delta_d)) << "/sec" << endl;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    cout << "Elapsed: " << delta_d << "\t" << format(int(howmany / delta_d)) << "/sec" << endl;
 }
 
-
 void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
 {
 
     cout << log->name() << "...\t\t" << flush;
-    std::atomic<int > msg_counter {0};
+    std::atomic<int> msg_counter{0};
     vector<thread> threads;
     auto start = system_clock::now();
     for (int t = 0; t < thread_count; ++t)
     {
-        threads.push_back(std::thread([&]()
-        {
-            for(;;)
+        threads.push_back(std::thread([&]() {
+            for (;;)
             {
                 int counter = ++msg_counter;
-                if (counter > howmany) break;
+                if (counter > howmany)
+                    break;
                 log->info("Hello logger: msg number {}", counter);
             }
         }));
     }
 
-
-    for(auto &t:threads)
+    for (auto &t : threads)
     {
         t.join();
     };
 
-
     auto delta = system_clock::now() - start;
-    auto delta_d = duration_cast<duration<double>> (delta).count();
-    cout << format(int(howmany / delta_d)) << "/sec" << endl;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    cout << "Elapsed: " << delta_d << "\t" << format(int(howmany / delta_d)) << "/sec" << endl;
 }

example/example.cpp

@@ -5,65 +5,71 @@
 //
 // spdlog usage example
 //
+//
+
+#define SPDLOG_TRACE_ON
+#define SPDLOG_DEBUG_ON
+
 #include "spdlog/spdlog.h"
 
-#include <cstdlib> // EXIT_FAILURE
 #include <iostream>
 #include <memory>
 
 void async_example();
 void syslog_example();
+void android_example();
 void user_defined_example();
+void err_handler_example();
 
 namespace spd = spdlog;
-int main(int, char*[])
+int main(int, char *[])
 {
     try
     {
-        // Multithreaded color console
-        auto console = spd::stdout_logger_mt("console", true);
+        // Console logger with color
+        auto console = spd::stdout_color_mt("console");
         console->info("Welcome to spdlog!");
-        console->error("An info message example {}..", 1);
+        console->error("Some error message with arg{}..", 1);
 
         // Formatting examples
         console->warn("Easy padding in numbers like {:08d}", 12);
         console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
         console->info("Support for floats {:03.2f}", 1.23456);
         console->info("Positional args are {1} {0}..", "too", "supported");
-
         console->info("{:<30}", "left aligned");
-        console->info("{:>30}", "right aligned");
-        console->info("{:^30}", "centered");
 
         spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
 
-        // Runtime log levels
-        spd::set_level(spd::level::info); //Set global log level to info
-        console->debug("This message shold not be displayed!");
-        console->set_level(spd::level::debug); // Set specific logger's log level
-        console->debug("This message shold be displayed..");
-
         // Create basic file logger (not rotated)
-        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic.txt");
+        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic-log.txt");
         my_logger->info("Some log message");
 
-
         // Create a file rotating logger with 5mb size max and 3 rotated files
-        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile", 1048576 * 5, 3);
+        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
         for (int i = 0; i < 10; ++i)
-            rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);
+        {
+            rotating_logger->info("{} * {} equals {:>10}", i, i, i * i);
+        }
 
         // Create a daily logger - a new file is created every day on 2:30am
-        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);
+        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+        // trigger flush if the log severity is error or higher
+        daily_logger->flush_on(spd::level::err);
         daily_logger->info(123.44);
 
         // Customize msg format for all messages
-        spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
-        rotating_logger->info("This is another message with custom format");
+        spd::set_pattern("[%^+++%$] [%H:%M:%S %z] [thread %t] %v");
+        console->info("This an info message with custom format");
+        console->error("This an error message with custom format");
 
+        // Runtime log levels
+        spd::set_level(spd::level::info); // Set global log level to info
+        console->debug("This message should not be displayed!");
+        console->set_level(spd::level::debug); // Set specific logger's log level
+        console->debug("This message should be displayed..");
 
-        // Compile time debug or trace macros.
-        // Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
+        // Compile time log levels
+        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
         SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
         SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
 
@@ -71,42 +77,60 @@ int main(int, char*[])
         // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
         async_example();
 
-        // syslog example. linux/osx only..
+        // syslog example. linux/osx only
         syslog_example();
 
-        // log user-defined types example..
+        // android example. compile with NDK
+        android_example();
+
+        // Log user-defined types example
         user_defined_example();
 
+        // Change default log error handler
+        err_handler_example();
+
+        // Apply a function on all registered loggers
+        spd::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
 
         // Release and close all loggers
         spdlog::drop_all();
     }
-
-    catch (const spd::spdlog_ex& ex)
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
+    catch (const spd::spdlog_ex &ex)
     {
-        std::cout << "Log failed: " << ex.what() << std::endl;
-        return EXIT_FAILURE;
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+        return 1;
     }
-    return EXIT_SUCCESS;
 }
 
-
 void async_example()
 {
-    size_t q_size = 4096; //queue size must be power of 2
+    size_t q_size = 4096;
     spdlog::set_async_mode(q_size);
     auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
     for (int i = 0; i < 100; ++i)
+    {
         async_file->info("Async message #{}", i);
+    }
 }
 
-//syslog example (linux/osx only)
+// syslog example (linux/osx/freebsd)
 void syslog_example()
 {
-#if defined (__linux__) || defined(__APPLE__)
+#ifdef SPDLOG_ENABLE_SYSLOG
     std::string ident = "spdlog-example";
     auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
-    syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
+    syslog_logger->warn("This is warning that will end up in syslog.");
+#endif
+}
+
+// Android example
+void android_example()
+{
+#if defined(__ANDROID__)
+    std::string tag = "spdlog-android";
+    auto android_logger = spd::android_logger("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
 #endif
 }
 
@@ -115,15 +139,24 @@ struct my_type
 {
     int i;
     template<typename OStream>
-    friend OStream& operator<<(OStream& os, const my_type &c)
+    friend OStream &operator<<(OStream &os, const my_type &c)
     {
-        return os << "[my_type i="<<c.i << "]";
+        return os << "[my_type i=" << c.i << "]";
     }
 };
 
-#include <spdlog/fmt/ostr.h> // must be included
+#include "spdlog/fmt/ostr.h" // must be included
 void user_defined_example()
 {
-    spd::get("console")->info("user defined type: {}", my_type { 14 });
+    spd::get("console")->info("user defined type: {}", my_type{14});
 }
 
+//
+// custom error handler
+//
+void err_handler_example()
+{
+    // can be set globaly or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { std::cerr << "my err handler: " << msg << std::endl; });
+    spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
+}

example/example.sln

@@ -1,10 +1,83 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.25420.1
+# Visual Studio 15
+VisualStudioVersion = 15.0.27428.2037
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example", "example.vcxproj", "{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "spdlog", "spdlog", "{319A0767-E66D-4DD0-8BEF-E29E891BA836}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\async_logger.h = ..\include\spdlog\async_logger.h
+		..\include\spdlog\common.h = ..\include\spdlog\common.h
+		..\include\spdlog\formatter.h = ..\include\spdlog\formatter.h
+		..\include\spdlog\logger.h = ..\include\spdlog\logger.h
+		..\include\spdlog\spdlog.h = ..\include\spdlog\spdlog.h
+		..\include\spdlog\tweakme.h = ..\include\spdlog\tweakme.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "contrib", "contrib", "{F1B153FB-7638-4F2B-B6FF-F56859D381F9}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\contrib\README.md = ..\include\spdlog\contrib\README.md
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{9B3669F7-6D70-4699-9067-451E9298BA53}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\contrib\sinks\.gitignore = ..\include\spdlog\contrib\sinks\.gitignore
+		..\include\spdlog\contrib\sinks\step_file_sink.h = ..\include\spdlog\contrib\sinks\step_file_sink.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "details", "details", "{579FDBF1-8FCD-4F1D-99F1-540F2EFF95E0}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\details\async_log_helper.h = ..\include\spdlog\details\async_log_helper.h
+		..\include\spdlog\details\async_logger_impl.h = ..\include\spdlog\details\async_logger_impl.h
+		..\include\spdlog\details\file_helper.h = ..\include\spdlog\details\file_helper.h
+		..\include\spdlog\details\log_msg.h = ..\include\spdlog\details\log_msg.h
+		..\include\spdlog\details\logger_impl.h = ..\include\spdlog\details\logger_impl.h
+		..\include\spdlog\details\mpmc_blocking_q.h = ..\include\spdlog\details\mpmc_blocking_q.h
+		..\include\spdlog\details\null_mutex.h = ..\include\spdlog\details\null_mutex.h
+		..\include\spdlog\details\os.h = ..\include\spdlog\details\os.h
+		..\include\spdlog\details\pattern_formatter_impl.h = ..\include\spdlog\details\pattern_formatter_impl.h
+		..\include\spdlog\details\registry.h = ..\include\spdlog\details\registry.h
+		..\include\spdlog\details\spdlog_impl.h = ..\include\spdlog\details\spdlog_impl.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "fmt", "fmt", "{2034E575-9375-4AE7-B667-AF4A359F1483}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\fmt\fmt.h = ..\include\spdlog\fmt\fmt.h
+		..\include\spdlog\fmt\ostr.h = ..\include\spdlog\fmt\ostr.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "bundled", "bundled", "{16763E99-3CC7-4C46-8F79-259356FF0B37}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\fmt\bundled\format.cc = ..\include\spdlog\fmt\bundled\format.cc
+		..\include\spdlog\fmt\bundled\format.h = ..\include\spdlog\fmt\bundled\format.h
+		..\include\spdlog\fmt\bundled\LICENSE.rst = ..\include\spdlog\fmt\bundled\LICENSE.rst
+		..\include\spdlog\fmt\bundled\ostream.cc = ..\include\spdlog\fmt\bundled\ostream.cc
+		..\include\spdlog\fmt\bundled\ostream.h = ..\include\spdlog\fmt\bundled\ostream.h
+		..\include\spdlog\fmt\bundled\posix.cc = ..\include\spdlog\fmt\bundled\posix.cc
+		..\include\spdlog\fmt\bundled\posix.h = ..\include\spdlog\fmt\bundled\posix.h
+		..\include\spdlog\fmt\bundled\printf.cc = ..\include\spdlog\fmt\bundled\printf.cc
+		..\include\spdlog\fmt\bundled\printf.h = ..\include\spdlog\fmt\bundled\printf.h
+		..\include\spdlog\fmt\bundled\time.h = ..\include\spdlog\fmt\bundled\time.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{13310FA4-52E7-46BA-B071-B72B1D8E44D9}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\sinks\android_sink.h = ..\include\spdlog\sinks\android_sink.h
+		..\include\spdlog\sinks\ansicolor_sink.h = ..\include\spdlog\sinks\ansicolor_sink.h
+		..\include\spdlog\sinks\base_sink.h = ..\include\spdlog\sinks\base_sink.h
+		..\include\spdlog\sinks\dist_sink.h = ..\include\spdlog\sinks\dist_sink.h
+		..\include\spdlog\sinks\file_sinks.h = ..\include\spdlog\sinks\file_sinks.h
+		..\include\spdlog\sinks\msvc_sink.h = ..\include\spdlog\sinks\msvc_sink.h
+		..\include\spdlog\sinks\null_sink.h = ..\include\spdlog\sinks\null_sink.h
+		..\include\spdlog\sinks\ostream_sink.h = ..\include\spdlog\sinks\ostream_sink.h
+		..\include\spdlog\sinks\sink.h = ..\include\spdlog\sinks\sink.h
+		..\include\spdlog\sinks\stdout_sinks.h = ..\include\spdlog\sinks\stdout_sinks.h
+		..\include\spdlog\sinks\syslog_sink.h = ..\include\spdlog\sinks\syslog_sink.h
+		..\include\spdlog\sinks\wincolor_sink.h = ..\include\spdlog\sinks\wincolor_sink.h
+		..\include\spdlog\sinks\windebug_sink.h = ..\include\spdlog\sinks\windebug_sink.h
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -23,4 +96,15 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{F1B153FB-7638-4F2B-B6FF-F56859D381F9} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
+		{9B3669F7-6D70-4699-9067-451E9298BA53} = {F1B153FB-7638-4F2B-B6FF-F56859D381F9}
+		{579FDBF1-8FCD-4F1D-99F1-540F2EFF95E0} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
+		{2034E575-9375-4AE7-B667-AF4A359F1483} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
+		{16763E99-3CC7-4C46-8F79-259356FF0B37} = {2034E575-9375-4AE7-B667-AF4A359F1483}
+		{13310FA4-52E7-46BA-B071-B72B1D8E44D9} = {319A0767-E66D-4DD0-8BEF-E29E891BA836}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {8C12721F-513C-4922-B2F8-B9F2403412B4}
+	EndGlobalSection
 EndGlobal

example/example.vcxproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -13,55 +13,23 @@
   <ItemGroup>
     <ClCompile Include="example.cpp" />
   </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="..\include\spdlog\async_logger.h" />
-    <ClInclude Include="..\include\spdlog\common.h" />
-    <ClInclude Include="..\include\spdlog\details\async_logger_impl.h" />
-    <ClInclude Include="..\include\spdlog\details\async_log_helper.h" />
-    <ClInclude Include="..\include\spdlog\details\file_helper.h" />
-    <ClInclude Include="..\include\spdlog\details\logger_impl.h" />
-    <ClInclude Include="..\include\spdlog\details\log_msg.h" />
-    <ClInclude Include="..\include\spdlog\details\mpmc_bounded_q.h" />
-    <ClInclude Include="..\include\spdlog\details\null_mutex.h" />
-    <ClInclude Include="..\include\spdlog\details\os.h" />
-    <ClInclude Include="..\include\spdlog\details\pattern_formatter_impl.h" />
-    <ClInclude Include="..\include\spdlog\details\registry.h" />
-    <ClInclude Include="..\include\spdlog\details\spdlog_impl.h" />
-    <ClInclude Include="..\include\spdlog\fmt\fmt.h" />
-    <ClInclude Include="..\include\spdlog\fmt\ostr.h" />
-    <ClInclude Include="..\include\spdlog\formatter.h" />
-    <ClInclude Include="..\include\spdlog\logger.h" />
-    <ClInclude Include="..\include\spdlog\sinks\android_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\ansicolor_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\base_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\dist_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\file_sinks.h" />
-    <ClInclude Include="..\include\spdlog\sinks\msvc_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\null_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\ostream_sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\sink.h" />
-    <ClInclude Include="..\include\spdlog\sinks\stdout_sinks.h" />
-    <ClInclude Include="..\include\spdlog\sinks\syslog_sink.h" />
-    <ClInclude Include="..\include\spdlog\spdlog.h" />
-    <ClInclude Include="..\include\spdlog\tweakme.h" />
-  </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>.</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.16299.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

example/jni/Android.mk

@@ -0,0 +1,15 @@
+# Setup a project
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := example
+LOCAL_SRC_FILES := example.cpp
+LOCAL_CPPFLAGS += -Wall -Wshadow -Wextra -pedantic -std=c++11 -fPIE -pie
+LOCAL_LDFLAGS +=  -fPIE -pie
+
+# Add exception support and set path for spdlog's headers
+LOCAL_CPPFLAGS += -fexceptions -I../include
+# Use android's log library
+LOCAL_LDFLAGS += -llog
+
+include $(BUILD_EXECUTABLE)

example/jni/Application.mk

@@ -0,0 +1,2 @@
+# Exceptions are used in spdlog. Link to an exception-ready C++ runtime.
+APP_STL = gnustl_static

example/jni/example.cpp

@@ -0,0 +1,157 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+//
+// spdlog usage example
+//
+//
+
+#define SPDLOG_TRACE_ON
+#define SPDLOG_DEBUG_ON
+
+#include "spdlog/spdlog.h"
+
+#include <iostream>
+#include <memory>
+
+void async_example();
+void syslog_example();
+void android_example();
+void user_defined_example();
+void err_handler_example();
+
+namespace spd = spdlog;
+int main(int, char *[])
+{
+    try
+    {
+        // Console logger with color
+        auto console = spd::stdout_color_mt("console");
+        console->info("Welcome to spdlog!");
+        console->error("Some error message with arg{}..", 1);
+
+        // Formatting examples
+        console->warn("Easy padding in numbers like {:08d}", 12);
+        console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+        console->info("Support for floats {:03.2f}", 1.23456);
+        console->info("Positional args are {1} {0}..", "too", "supported");
+        console->info("{:<30}", "left aligned");
+
+        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
+
+        // Create basic file logger (not rotated)
+        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic-log.txt");
+        my_logger->info("Some log message");
+
+        // Create a file rotating logger with 5mb size max and 3 rotated files
+        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+        for (int i = 0; i < 10; ++i)
+            rotating_logger->info("{} * {} equals {:>10}", i, i, i * i);
+
+        // Create a daily logger - a new file is created every day on 2:30am
+        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+        // trigger flush if the log severity is error or higher
+        daily_logger->flush_on(spd::level::err);
+        daily_logger->info(123.44);
+
+        // Customize msg format for all messages
+        spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
+        rotating_logger->info("This is another message with custom format");
+
+        // Runtime log levels
+        spd::set_level(spd::level::info); // Set global log level to info
+        console->debug("This message should not be displayed!");
+        console->set_level(spd::level::debug); // Set specific logger's log level
+        console->debug("This message should be displayed..");
+
+        // Compile time log levels
+        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
+        SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
+        SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
+
+        // Asynchronous logging is very fast..
+        // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
+        async_example();
+
+        // syslog example. linux/osx only
+        syslog_example();
+
+        // android example. compile with NDK
+        android_example();
+
+        // Log user-defined types example
+        user_defined_example();
+
+        // Change default log error handler
+        err_handler_example();
+
+        // Apply a function on all registered loggers
+        spd::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
+
+        // Release and close all loggers
+        spdlog::drop_all();
+    }
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
+    catch (const spd::spdlog_ex &ex)
+    {
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+        return 1;
+    }
+}
+
+void async_example()
+{
+    size_t q_size = 4096; // queue size must be power of 2
+    spdlog::set_async_mode(q_size);
+    auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
+    for (int i = 0; i < 100; ++i)
+        async_file->info("Async message #{}", i);
+}
+
+// syslog example (linux/osx/freebsd)
+void syslog_example()
+{
+#ifdef SPDLOG_ENABLE_SYSLOG
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+#endif
+}
+
+// Android example
+void android_example()
+{
+#if defined(__ANDROID__)
+    std::string tag = "spdlog-android";
+    auto android_logger = spd::android_logger("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+#endif
+}
+
+// user defined types logging by implementing operator<<
+struct my_type
+{
+    int i;
+    template<typename OStream>
+    friend OStream &operator<<(OStream &os, const my_type &c)
+    {
+        return os << "[my_type i=" << c.i << "]";
+    }
+};
+
+#include "spdlog/fmt/ostr.h" // must be included
+void user_defined_example()
+{
+    spd::get("console")->info("user defined type: {}", my_type{14});
+}
+
+//
+// custom error handler
+//
+void err_handler_example()
+{
+    // can be set globaly or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { std::cerr << "my err handler: " << msg << std::endl; });
+    spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
+}

example/multisink.cpp

@@ -0,0 +1,46 @@
+#include "spdlog/spdlog.h"
+
+#include <iostream>
+#include <memory>
+
+namespace spd = spdlog;
+int main(int, char *[])
+{
+    bool enable_debug = true;
+    try
+    {
+        // This other example use a single logger with multiple sinks.
+        // This means that the same log_msg is forwarded to multiple sinks;
+        // Each sink can have it's own log level and a message will be logged.
+        std::vector<spdlog::sink_ptr> sinks;
+        sinks.push_back(std::make_shared<spdlog::sinks::stdout_sink_mt>());
+        sinks.push_back(std::make_shared<spdlog::sinks::simple_file_sink_mt>("./log_regular_file.txt"));
+        sinks.push_back(std::make_shared<spdlog::sinks::simple_file_sink_mt>("./log_debug_file.txt"));
+
+        spdlog::logger console_multisink("multisink", sinks.begin(), sinks.end());
+        console_multisink.set_level(spdlog::level::warn);
+
+        sinks[0]->set_level(spdlog::level::trace); // console. Allow everything.  Default value
+        sinks[1]->set_level(spdlog::level::trace); //  regular file. Allow everything.  Default value
+        sinks[2]->set_level(spdlog::level::off);   //  regular file. Ignore everything.
+
+        console_multisink.warn("warn: will print only on console and regular file");
+
+        if (enable_debug)
+        {
+            console_multisink.set_level(spdlog::level::debug); // level of the logger
+            sinks[1]->set_level(spdlog::level::debug);         // regular file
+            sinks[2]->set_level(spdlog::level::debug);         // debug file
+        }
+        console_multisink.debug("Debug: you should see this on console and both files");
+
+        // Release and close all loggers
+        spdlog::drop_all();
+    }
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
+    catch (const spd::spdlog_ex &ex)
+    {
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+        return 1;
+    }
+}

example/utils.h

@@ -5,15 +5,14 @@
 
 #pragma once
 
-#include <sstream>
 #include <iomanip>
 #include <locale>
+#include <sstream>
 
-namespace utils
-{
+namespace utils {
 
 template<typename T>
-inline std::string format(const T& value)
+inline std::string format(const T &value)
 {
     static std::locale loc("");
     std::stringstream ss;
@@ -23,7 +22,7 @@ inline std::string format(const T& value)
 }
 
 template<>
-inline std::string format(const double & value)
+inline std::string format(const double &value)
 {
     static std::locale loc("");
     std::stringstream ss;
@@ -32,4 +31,4 @@ inline std::string format(const double & value)
     return ss.str();
 }
 
-}
+} // namespace utils

format.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+echo -n "Running dos2unix     "
+find . -name "*\.h" -o -name "*\.cpp"|xargs -I {} sh -c "dos2unix '{}' 2>/dev/null; echo -n '.'"
+echo
+echo -n "Running clang-format "
+find . -name "*\.h" -o -name "*\.cpp"|xargs -I {} sh -c "clang-format -i {}; echo -n '.'"
+echo
+
+

include/spdlog/async_logger.h

@@ -15,62 +15,58 @@
 //    3. will throw spdlog_ex upon log exceptions
 // Upon destruction, logs all remaining messages in the queue before destructing..
 
-#include <spdlog/common.h>
-#include <spdlog/logger.h>
+#include "common.h"
+#include "logger.h"
 
 #include <chrono>
 #include <functional>
-#include <string>
 #include <memory>
+#include <string>
 
-namespace spdlog
-{
+namespace spdlog {
 
-namespace details
-{
+namespace details {
 class async_log_helper;
 }
 
-class async_logger :public logger
+class async_logger SPDLOG_FINAL : public logger
 {
 public:
     template<class It>
-    async_logger(const std::string& name,
-                 const It& begin,
-                 const It& end,
-                 size_t queue_size,
-                 const async_overflow_policy overflow_policy =  async_overflow_policy::block_retry,
-                 const std::function<void()>& worker_warmup_cb = nullptr,
-                 const std::chrono::milliseconds& flush_interval_ms = std::chrono::milliseconds::zero(),
-                 const std::function<void()>& worker_teardown_cb = nullptr);
+    async_logger(const std::string &logger_name, const It &begin, const It &end, size_t queue_size,
+        const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
+        const std::function<void()> &worker_warmup_cb = nullptr,
+        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
+        const std::function<void()> &worker_teardown_cb = nullptr);
 
-    async_logger(const std::string& logger_name,
-                 sinks_init_list sinks,
-                 size_t queue_size,
-                 const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
-                 const std::function<void()>& worker_warmup_cb = nullptr,
-                 const std::chrono::milliseconds& flush_interval_ms = std::chrono::milliseconds::zero(),
-                 const std::function<void()>& worker_teardown_cb = nullptr);
-
-    async_logger(const std::string& logger_name,
-                 sink_ptr single_sink,
-                 size_t queue_size,
-                 const async_overflow_policy overflow_policy =  async_overflow_policy::block_retry,
-                 const std::function<void()>& worker_warmup_cb = nullptr,
-                 const std::chrono::milliseconds& flush_interval_ms = std::chrono::milliseconds::zero(),
-                 const std::function<void()>& worker_teardown_cb = nullptr);
+    async_logger(const std::string &logger_name, sinks_init_list sinks, size_t queue_size,
+        const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
+        const std::function<void()> &worker_warmup_cb = nullptr,
+        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
+        const std::function<void()> &worker_teardown_cb = nullptr);
 
+    async_logger(const std::string &logger_name, sink_ptr single_sink, size_t queue_size,
+        const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
+        const std::function<void()> &worker_warmup_cb = nullptr,
+        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
+        const std::function<void()> &worker_teardown_cb = nullptr);
 
+    // Wait for the queue to be empty, and flush synchronously
+    // Warning: this can potentially last forever as we wait it to complete
     void flush() override;
+
+    // Error handler
+    void set_error_handler(log_err_handler) override;
+    log_err_handler error_handler() override;
+
 protected:
-    void _sink_it(details::log_msg& msg) override;
+    void _sink_it(details::log_msg &msg) override;
     void _set_formatter(spdlog::formatter_ptr msg_formatter) override;
-    void _set_pattern(const std::string& pattern) override;
+    void _set_pattern(const std::string &pattern, pattern_time_type pattern_time) override;
 
 private:
     std::unique_ptr<details::async_log_helper> _async_log_helper;
 };
-}
+} // namespace spdlog
 
-
-#include <spdlog/details/async_logger_impl.h>
+#include "details/async_logger_impl.h"

include/spdlog/common.h

@@ -5,20 +5,27 @@
 
 #pragma once
 
-#include <string>
-#include <initializer_list>
-#include <chrono>
-#include <memory>
+#define SPDLOG_VERSION "0.17.0"
+
+#include "tweakme.h"
+
 #include <atomic>
+#include <chrono>
 #include <exception>
+#include <functional>
+#include <initializer_list>
+#include <memory>
+#include <string>
+#include <unordered_map>
+
 #if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
 #include <codecvt>
 #include <locale>
 #endif
 
-#include <spdlog/details/null_mutex.h>
+#include "details/null_mutex.h"
 
-//visual studio upto 2013 does not support noexcept nor constexpr
+// visual studio upto 2013 does not support noexcept nor constexpr
 #if defined(_MSC_VER) && (_MSC_VER < 1900)
 #define SPDLOG_NOEXCEPT throw()
 #define SPDLOG_CONSTEXPR
@@ -27,42 +34,46 @@
 #define SPDLOG_CONSTEXPR constexpr
 #endif
 
-#if defined(__GNUC__)  || defined(__clang__)
-#define DEPRECATED __attribute__((deprecated))
-#elif defined(_MSC_VER)
-#define DEPRECATED __declspec(deprecated)
+// final keyword support. On by default. See tweakme.h
+#if defined(SPDLOG_NO_FINAL)
+#define SPDLOG_FINAL
 #else
-#define DEPRECATED
+#define SPDLOG_FINAL final
 #endif
 
+#if defined(__GNUC__) || defined(__clang__)
+#define SPDLOG_DEPRECATED __attribute__((deprecated))
+#elif defined(_MSC_VER)
+#define SPDLOG_DEPRECATED __declspec(deprecated)
+#else
+#define SPDLOG_DEPRECATED
+#endif
 
-#include <spdlog/fmt/fmt.h>
+#include "fmt/fmt.h"
 
-namespace spdlog
-{
+namespace spdlog {
 
 class formatter;
 
-namespace sinks
-{
+namespace sinks {
 class sink;
 }
 
 using log_clock = std::chrono::system_clock;
-using sink_ptr = std::shared_ptr < sinks::sink >;
-using sinks_init_list = std::initializer_list < sink_ptr >;
+using sink_ptr = std::shared_ptr<sinks::sink>;
+using sinks_init_list = std::initializer_list<sink_ptr>;
 using formatter_ptr = std::shared_ptr<spdlog::formatter>;
 #if defined(SPDLOG_NO_ATOMIC_LEVELS)
 using level_t = details::null_atomic_int;
 #else
-using level_t = std::atomic_int;
+using level_t = std::atomic<int>;
 #endif
 
+using log_err_handler = std::function<void(const std::string &err_msg)>;
 
-//Log level enum
-namespace level
-{
-typedef enum
+// Log level enum
+namespace level {
+enum level_enum
 {
     trace = 0,
     debug = 1,
@@ -71,60 +82,89 @@ typedef enum
     err = 4,
     critical = 5,
     off = 6
-} level_enum;
+};
 
-static const char* level_names[] { "trace", "debug", "info",  "warning", "error", "critical", "off" };
+#if !defined(SPDLOG_LEVEL_NAMES)
+#define SPDLOG_LEVEL_NAMES                                                                                                                 \
+    {                                                                                                                                      \
+        "trace", "debug", "info", "warning", "error", "critical", "off"                                                                    \
+    }
+#endif
+static const char *level_names[] SPDLOG_LEVEL_NAMES;
 
-static const char* short_level_names[] { "T", "D", "I", "W", "E", "C", "O" };
+static const char *short_level_names[]{"T", "D", "I", "W", "E", "C", "O"};
 
-inline const char* to_str(spdlog::level::level_enum l)
+inline const char *to_str(spdlog::level::level_enum l)
 {
     return level_names[l];
 }
 
-inline const char* to_short_str(spdlog::level::level_enum l)
+inline const char *to_short_str(spdlog::level::level_enum l)
 {
     return short_level_names[l];
 }
-} //level
+inline spdlog::level::level_enum from_str(const std::string &name)
+{
+    static std::unordered_map<std::string, level_enum> name_to_level = // map string->level
+        {{level_names[0], level::trace},                               // trace
+            {level_names[1], level::debug},                            // debug
+            {level_names[2], level::info},                             // info
+            {level_names[3], level::warn},                             // warn
+            {level_names[4], level::err},                              // err
+            {level_names[5], level::critical},                         // critical
+            {level_names[6], level::off}};                             // off
 
+    auto lvl_it = name_to_level.find(name);
+    return lvl_it != name_to_level.end() ? lvl_it->second : level::off;
+}
+
+using level_hasher = std::hash<int>;
+} // namespace level
 
 //
 // Async overflow policy - block by default.
 //
 enum class async_overflow_policy
 {
-    block_retry, // Block / yield / sleep until message can be enqueued
+    block_retry,    // Block / yield / sleep until message can be enqueued
     discard_log_msg // Discard the message it enqueue fails
 };
 
+//
+// Pattern time - specific time getting to use for pattern_formatter.
+// local time by default
+//
+enum class pattern_time_type
+{
+    local, // log localtime
+    utc    // log utc
+};
 
 //
 // Log exception
 //
-namespace details
-{
-namespace os
-{
-std::string errno_str(int err_num);
-}
-}
-class spdlog_ex: public std::exception
+class spdlog_ex : public std::exception
 {
 public:
-    spdlog_ex(const std::string& msg):_msg(msg)
-    {}
-    spdlog_ex(const std::string& msg, int last_errno)
+    explicit spdlog_ex(std::string msg)
+        : _msg(std::move(msg))
     {
-        _msg = msg + ": " + details::os::errno_str(last_errno);
     }
-    const char* what() const SPDLOG_NOEXCEPT override
+
+    spdlog_ex(const std::string &msg, int last_errno)
+    {
+        fmt::MemoryWriter writer;
+        fmt::format_system_error(writer, last_errno, msg);
+        _msg = writer.str();
+    }
+
+    const char *what() const SPDLOG_NOEXCEPT override
     {
         return _msg.c_str();
     }
+
 private:
     std::string _msg;
-
 };
 
 //
@@ -136,5 +176,13 @@ using filename_t = std::wstring;
 using filename_t = std::string;
 #endif
 
-
-} //spdlog
+#define SPDLOG_CATCH_AND_HANDLE                                                                                                            \
+    catch (const std::exception &ex)                                                                                                       \
+    {                                                                                                                                      \
+        _err_handler(ex.what());                                                                                                           \
+    }                                                                                                                                      \
+    catch (...)                                                                                                                            \
+    {                                                                                                                                      \
+        _err_handler("Unknown exeption in logger");                                                                                        \
+    }
+} // namespace spdlog

include/spdlog/contrib/README.md

@@ -0,0 +1 @@
+Please put here your contribs. Popular contribs will be moved to main tree after stablization

include/spdlog/contrib/sinks/.gitignore

@@ -0,0 +1 @@
+

include/spdlog/contrib/sinks/step_file_sink.h

@@ -0,0 +1,216 @@
+#pragma once
+
+#include "../../details/file_helper.h"
+#include "../../details/null_mutex.h"
+#include "../../fmt/fmt.h"
+#include "../../sinks/base_sink.h"
+
+#include <algorithm>
+#include <cerrno>
+#include <chrono>
+#include <cstdio>
+#include <ctime>
+#include <mutex>
+#include <string>
+
+// Example for spdlog.h
+//
+// Create a file logger which creates new files with a specified time step and fixed file size:
+//
+// std::shared_ptr<logger> step_logger_mt(const std::string &logger_name, const filename_t &filename, unsigned seconds = 60, const
+// filename_t &tmp_ext = ".tmp", unsigned max_file_size = std::numeric_limits<unsigned>::max(), bool delete_empty_files = true, const
+// filename_t &file_header = ""); std::shared_ptr<logger> step_logger_st(const std::string &logger_name, const filename_t &filename,
+// unsigned seconds = 60, const filename_t &tmp_ext = ".tmp", unsigned max_file_size = std::numeric_limits<unsigned>::max());
+
+// Example for spdlog_impl.h
+// Create a file logger that creates new files with a specified increment
+// inline std::shared_ptr<spdlog::logger> spdlog::step_logger_mt(
+//     const std::string &logger_name, const filename_t &filename_fmt, unsigned seconds, const filename_t &tmp_ext, unsigned max_file_size,
+//     bool delete_empty_files, const filename_t &file_header)
+// {
+//     return create<spdlog::sinks::step_file_sink_mt>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size, delete_empty_files,
+//     file_header);
+// }
+
+// inline std::shared_ptr<spdlog::logger> spdlog::step_logger_st(
+//     const std::string &logger_name, const filename_t &filename_fmt, unsigned seconds, const filename_t &tmp_ext, unsigned max_file_size,
+//     bool delete_empty_files, const filename_t &file_header)
+// {
+//     return create<spdlog::sinks::step_file_sink_st>(logger_name, filename_fmt, seconds, tmp_ext, max_file_size, delete_empty_files,
+//     file_header);
+// }
+
+namespace spdlog {
+namespace sinks {
+
+/*
+ * Default generator of step log file names.
+ */
+struct default_step_file_name_calculator
+{
+    // Create filename for the form filename_YYYY-MM-DD_hh-mm-ss.ext
+    static std::tuple<filename_t, filename_t> calc_filename(const filename_t &filename, const filename_t &tmp_ext)
+    {
+        std::tm tm = spdlog::details::os::localtime();
+        filename_t basename, ext;
+        std::tie(basename, ext) = details::file_helper::split_by_extenstion(filename);
+        std::conditional<std::is_same<filename_t::value_type, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
+        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}-{:02d}{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+            tm.tm_hour, tm.tm_min, tm.tm_sec, tmp_ext);
+        return std::make_tuple(w.str(), ext);
+    }
+};
+
+/*
+ * Rotating file sink based on size and a specified time step
+ */
+template<class Mutex, class FileNameCalc = default_step_file_name_calculator>
+class step_file_sink SPDLOG_FINAL : public base_sink<Mutex>
+{
+public:
+    step_file_sink(filename_t base_filename, unsigned step_seconds, filename_t tmp_ext, unsigned max_size, bool delete_empty_files,
+        filename_t file_header)
+        : _base_filename(std::move(base_filename))
+        , _tmp_ext(std::move(tmp_ext))
+        , _step_seconds(step_seconds)
+        , _max_size(max_size)
+        , _delete_empty_files(delete_empty_files)
+    {
+        if (step_seconds == 0)
+        {
+            throw spdlog_ex("step_file_sink: Invalid time step in ctor");
+        }
+
+        if (!file_header.empty())
+        {
+            pattern_formatter formatter_for_file_header("%v");
+            _file_header.raw << file_header;
+            formatter_for_file_header.format(_file_header);
+        }
+
+        if (max_size <= _file_header.formatted.size())
+        {
+            throw spdlog_ex("step_file_sink: Invalid max log size in ctor");
+        }
+
+        _tp = _next_tp();
+        std::tie(_current_filename, _ext) = FileNameCalc::calc_filename(_base_filename, _tmp_ext);
+
+        if (_tmp_ext == _ext)
+        {
+            throw spdlog_ex("step_file_sink: The temporary extension matches the specified in ctor");
+        }
+
+        _file_helper.open(_current_filename);
+        _current_size = _file_helper.size(); // expensive. called only once
+
+        if (!_current_size)
+        {
+            _current_size += _file_header.formatted.size();
+            if (_current_size)
+                _file_helper.write(_file_header);
+        }
+    }
+
+    ~step_file_sink()
+    {
+        try
+        {
+            close_current_file();
+        }
+        catch (...)
+        {
+        }
+    }
+
+protected:
+    void _sink_it(const details::log_msg &msg) override
+    {
+        auto msg_size = msg.formatted.size();
+
+        if (std::chrono::system_clock::now() >= _tp || _current_size + msg_size > _max_size)
+        {
+            filename_t new_filename;
+            std::tie(new_filename, std::ignore) = FileNameCalc::calc_filename(_base_filename, _tmp_ext);
+
+            bool change_occured = !details::file_helper::file_exists(new_filename);
+            if (change_occured)
+            {
+                close_current_file();
+
+                _current_filename = std::move(new_filename);
+
+                _file_helper.open(_current_filename);
+            }
+
+            _tp = _next_tp();
+
+            if (change_occured)
+            {
+                _current_size = _file_header.formatted.size();
+                if (_current_size)
+                    _file_helper.write(_file_header);
+            }
+        }
+
+        _current_size += msg_size;
+        _file_helper.write(msg);
+    }
+
+    void _flush() override
+    {
+        _file_helper.flush();
+    }
+
+private:
+    std::chrono::system_clock::time_point _next_tp()
+    {
+        return std::chrono::system_clock::now() + _step_seconds;
+    }
+
+    void close_current_file()
+    {
+        using details::os::filename_to_str;
+
+        // Delete empty files, if required
+        if (_delete_empty_files && _current_size <= _file_header.formatted.size())
+        {
+            if (details::os::remove(_current_filename) != 0)
+            {
+                throw spdlog_ex("step_file_sink: not remove " + filename_to_str(_current_filename), errno);
+            }
+
+            return;
+        }
+
+        filename_t target;
+        std::tie(target, std::ignore) = details::file_helper::split_by_extenstion(_current_filename);
+        target += _ext;
+
+        if (details::file_helper::file_exists(_current_filename) && details::os::rename(_current_filename, target) != 0)
+        {
+            throw spdlog_ex(
+                "step_file_sink: failed renaming " + filename_to_str(_current_filename) + " to " + filename_to_str(target), errno);
+        }
+    }
+
+    const filename_t _base_filename;
+    const filename_t _tmp_ext;
+    const std::chrono::seconds _step_seconds;
+    const unsigned _max_size;
+    const bool _delete_empty_files;
+
+    std::chrono::system_clock::time_point _tp;
+    filename_t _current_filename;
+    filename_t _ext;
+    unsigned _current_size;
+
+    details::file_helper _file_helper;
+    details::log_msg _file_header;
+};
+
+using step_file_sink_mt = step_file_sink<std::mutex>;
+using step_file_sink_st = step_file_sink<details::null_mutex>;
+
+} // namespace sinks
+} // namespace spdlog

include/spdlog/details/async_log_helper.h

@@ -9,19 +9,18 @@
 // If the internal queue of log messages reaches its max size,
 // then the client call will block until there is more room.
 //
-// If the back thread throws during logging, a spdlog::spdlog_ex exception
-// will be thrown in client's thread when tries to log the next message
 
 #pragma once
 
-#include <spdlog/common.h>
-#include <spdlog/sinks/sink.h>
-#include <spdlog/details/mpmc_bounded_q.h>
-#include <spdlog/details/log_msg.h>
-#include <spdlog/details/os.h>
-#include <spdlog/formatter.h>
+#include "../common.h"
+#include "../details/log_msg.h"
+#include "../details/mpmc_blocking_q.h"
+#include "../details/os.h"
+#include "../formatter.h"
+#include "../sinks/sink.h"
 
 #include <chrono>
+#include <condition_variable>
 #include <exception>
 #include <functional>
 #include <memory>
@@ -30,10 +29,8 @@
 #include <utility>
 #include <vector>
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 
 class async_log_helper
 {
@@ -45,110 +42,95 @@ class async_log_helper
         flush,
         terminate
     };
+
     struct async_msg
     {
-        std::string logger_name;
         level::level_enum level;
         log_clock::time_point time;
         size_t thread_id;
         std::string txt;
         async_msg_type msg_type;
+        size_t msg_id;
 
         async_msg() = default;
         ~async_msg() = default;
 
-
-async_msg(async_msg&& other) SPDLOG_NOEXCEPT:
-        logger_name(std::move(other.logger_name)),
-                    level(std::move(other.level)),
-                    time(std::move(other.time)),
-                    txt(std::move(other.txt)),
-                    msg_type(std::move(other.msg_type))
-        {}
-
-        async_msg(async_msg_type m_type) :msg_type(m_type)
-        {};
-
-        async_msg& operator=(async_msg&& other) SPDLOG_NOEXCEPT
+        explicit async_msg(async_msg_type m_type)
+            : level(level::info)
+            , thread_id(0)
+            , msg_type(m_type)
+            , msg_id(0)
         {
-            logger_name = std::move(other.logger_name);
-            level = other.level;
-            time = std::move(other.time);
-            thread_id = other.thread_id;
-            txt = std::move(other.txt);
-            msg_type = other.msg_type;
-            return *this;
         }
 
+        async_msg(async_msg &&other) = default;
+        async_msg &operator=(async_msg &&other) = default;
+
         // never copy or assign. should only be moved..
-        async_msg(const async_msg&) = delete;
-        async_msg& operator=(async_msg& other) = delete;
+        async_msg(const async_msg &) = delete;
+        async_msg &operator=(const async_msg &other) = delete;
 
         // construct from log_msg
-        async_msg(const details::log_msg& m) :
-            level(m.level),
-            time(m.time),
-            thread_id(m.thread_id),
-            txt(m.raw.data(), m.raw.size()),
-            msg_type(async_msg_type::log)
+        explicit async_msg(const details::log_msg &m)
+            : level(m.level)
+            , time(m.time)
+            , thread_id(m.thread_id)
+            , txt(m.raw.data(), m.raw.size())
+            , msg_type(async_msg_type::log)
+            , msg_id(m.msg_id)
         {
-#ifndef SPDLOG_NO_NAME
-            logger_name = *m.logger_name;
-#endif
         }
 
-
         // copy into log_msg
-        void fill_log_msg(log_msg &msg)
+        void fill_log_msg(log_msg &msg, std::string *logger_name)
         {
-            msg.logger_name = &logger_name;
+            msg.logger_name = logger_name;
             msg.level = level;
             msg.time = time;
             msg.thread_id = thread_id;
+            msg.raw.clear();
             msg.raw << txt;
+            msg.msg_id = msg_id;
         }
     };
 
 public:
-
     using item_type = async_msg;
     using q_type = details::mpmc_bounded_queue<item_type>;
 
     using clock = std::chrono::steady_clock;
 
+    async_log_helper(std::string logger_name, formatter_ptr formatter, std::vector<sink_ptr> sinks, size_t queue_size,
+        const log_err_handler err_handler, const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
+        std::function<void()> worker_warmup_cb = nullptr,
+        const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
+        std::function<void()> worker_teardown_cb = nullptr);
 
-    async_log_helper(formatter_ptr formatter,
-                     const std::vector<sink_ptr>& sinks,
-                     size_t queue_size,
-                     const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
-                     const std::function<void()>& worker_warmup_cb = nullptr,
-                     const std::chrono::milliseconds& flush_interval_ms = std::chrono::milliseconds::zero(),
-                     const std::function<void()>& worker_teardown_cb = nullptr);
-
-    void log(const details::log_msg& msg);
+    void log(const details::log_msg &msg);
 
     // stop logging and join the back thread
     ~async_log_helper();
 
-    void set_formatter(formatter_ptr);
+    async_log_helper(const async_log_helper &) = delete;
+    async_log_helper &operator=(const async_log_helper &) = delete;
+
+    void set_formatter(formatter_ptr msg_formatter);
 
     void flush();
 
+    void set_error_handler(spdlog::log_err_handler err_handler);
 
 private:
+    std::string _logger_name;
     formatter_ptr _formatter;
     std::vector<std::shared_ptr<sinks::sink>> _sinks;
 
     // queue of messages to log
     q_type _q;
 
-    bool _flush_requested;
+    log_err_handler _err_handler;
 
-    bool _terminate_requested;
-
-
-    // last exception thrown from the worker thread
-    std::shared_ptr<spdlog_ex> _last_workerthread_ex;
+    std::chrono::time_point<log_clock> _last_flush;
 
     // overflow policy
     const async_overflow_policy _overflow_policy;
@@ -162,219 +144,190 @@ private:
     // worker thread teardown callback
     const std::function<void()> _worker_teardown_cb;
 
+    std::mutex null_mutex_;
+    // null_mutex null_mutex_;
+    std::condition_variable_any not_empty_cv_;
+    std::condition_variable_any not_full_cv_;
+
     // worker thread
     std::thread _worker_thread;
 
-    void push_msg(async_msg&& new_msg);
-
-    // throw last worker thread exception or if worker thread is not active
-    void throw_if_bad_worker();
+    void enqueue_msg(async_msg &&new_msg, async_overflow_policy policy);
 
     // worker thread main loop
     void worker_loop();
 
-    // pop next message from the queue and process it. will set the last_pop to the pop time
+    // dequeue next message from the queue and process it.
     // return false if termination of the queue is required
-    bool process_next_msg(log_clock::time_point& last_pop, log_clock::time_point& last_flush);
+    bool process_next_msg();
 
-    void handle_flush_interval(log_clock::time_point& now, log_clock::time_point& last_flush);
-
-    // sleep,yield or return immediatly using the time passed since last message as a hint
-    static void sleep_or_yield(const spdlog::log_clock::time_point& now, const log_clock::time_point& last_op_time);
+    void handle_flush_interval();
 
+    void flush_sinks();
 };
-}
-}
+} // namespace details
+} // namespace spdlog
 
 ///////////////////////////////////////////////////////////////////////////////
 // async_sink class implementation
 ///////////////////////////////////////////////////////////////////////////////
-inline spdlog::details::async_log_helper::async_log_helper(
-    formatter_ptr formatter,
-    const std::vector<sink_ptr>& sinks,
-    size_t queue_size,
-    const async_overflow_policy overflow_policy,
-    const std::function<void()>& worker_warmup_cb,
-    const std::chrono::milliseconds& flush_interval_ms,
-    const std::function<void()>& worker_teardown_cb):
-    _formatter(formatter),
-    _sinks(sinks),
-    _q(queue_size),
-    _flush_requested(false),
-    _terminate_requested(false),
-    _overflow_policy(overflow_policy),
-    _worker_warmup_cb(worker_warmup_cb),
-    _flush_interval_ms(flush_interval_ms),
-    _worker_teardown_cb(worker_teardown_cb),
-    _worker_thread(&async_log_helper::worker_loop, this)
-{}
+inline spdlog::details::async_log_helper::async_log_helper(std::string logger_name, formatter_ptr formatter, std::vector<sink_ptr> sinks,
+    size_t queue_size, log_err_handler err_handler, const async_overflow_policy overflow_policy, std::function<void()> worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, std::function<void()> worker_teardown_cb)
+    : _logger_name(std::move(logger_name))
+    , _formatter(std::move(formatter))
+    , _sinks(std::move(sinks))
+    , _q(queue_size)
+    , _err_handler(std::move(err_handler))
+    , _last_flush(os::now())
+    , _overflow_policy(overflow_policy)
+    , _worker_warmup_cb(std::move(worker_warmup_cb))
+    , _flush_interval_ms(flush_interval_ms)
+    , _worker_teardown_cb(std::move(worker_teardown_cb))
+{
+    _worker_thread = std::thread(&async_log_helper::worker_loop, this);
+}
 
-// Send to the worker thread termination message(level=off)
-// and wait for it to finish gracefully
+// send to the worker thread terminate message, and join it.
 inline spdlog::details::async_log_helper::~async_log_helper()
 {
     try
     {
-        push_msg(async_msg(async_msg_type::terminate));
+        enqueue_msg(async_msg(async_msg_type::terminate), async_overflow_policy::block_retry);
         _worker_thread.join();
     }
     catch (...) // don't crash in destructor
-    {}
-}
-
-
-//Try to push and block until succeeded (if the policy is not to discard when the queue is full)
-inline void spdlog::details::async_log_helper::log(const details::log_msg& msg)
-{
-    push_msg(async_msg(msg));
-
-
-}
-
-inline void spdlog::details::async_log_helper::push_msg(details::async_log_helper::async_msg&& new_msg)
-{
-    throw_if_bad_worker();
-    if (!_q.enqueue(std::move(new_msg)) && _overflow_policy != async_overflow_policy::discard_log_msg)
     {
-        auto last_op_time = details::os::now();
-        auto now = last_op_time;
-        do
-        {
-            now = details::os::now();
-            sleep_or_yield(now, last_op_time);
-        }
-        while (!_q.enqueue(std::move(new_msg)));
     }
-
 }
 
+// try to push and block until succeeded (if the policy is not to discard when the queue is full)
+inline void spdlog::details::async_log_helper::log(const details::log_msg &msg)
+{
+    enqueue_msg(async_msg(msg), _overflow_policy);
+}
+
+inline void spdlog::details::async_log_helper::enqueue_msg(details::async_log_helper::async_msg &&new_msg, async_overflow_policy policy)
+{
+
+    // block until succeeded pushing to the queue
+    if (policy == async_overflow_policy::block_retry)
+    {
+        _q.enqueue(std::move(new_msg));
+    }
+    else
+    {
+        _q.enqueue_nowait(std::move(new_msg));
+    }
+}
+
+// optionally wait for the queue be empty and request flush from the sinks
 inline void spdlog::details::async_log_helper::flush()
 {
-    push_msg(async_msg(async_msg_type::flush));
+    enqueue_msg(async_msg(async_msg_type::flush), _overflow_policy);
 }
 
 inline void spdlog::details::async_log_helper::worker_loop()
 {
-    try
+    if (_worker_warmup_cb)
     {
-        if (_worker_warmup_cb) _worker_warmup_cb();
-        auto last_pop = details::os::now();
-        auto last_flush = last_pop;
-        while(process_next_msg(last_pop, last_flush));
-        if (_worker_teardown_cb) _worker_teardown_cb();
+        _worker_warmup_cb();
     }
-    catch (const std::exception& ex)
+    auto active = true;
+    while (active)
     {
-        _last_workerthread_ex = std::make_shared<spdlog_ex>(std::string("async_logger worker thread exception: ") + ex.what());
+        try
+        {
+            active = process_next_msg();
+        }
+        SPDLOG_CATCH_AND_HANDLE
     }
-    catch (...)
+    if (_worker_teardown_cb)
     {
-        _last_workerthread_ex = std::make_shared<spdlog_ex>("async_logger worker thread exception");
+        _worker_teardown_cb();
     }
 }
 
 // process next message in the queue
 // return true if this thread should still be active (while no terminate msg was received)
-inline bool spdlog::details::async_log_helper::process_next_msg(log_clock::time_point& last_pop, log_clock::time_point& last_flush)
+inline bool spdlog::details::async_log_helper::process_next_msg()
 {
-
     async_msg incoming_async_msg;
-
-
-    if (_q.dequeue(incoming_async_msg))
+    bool dequeued = _q.dequeue_for(incoming_async_msg, std::chrono::seconds(2));
+    if (!dequeued)
     {
-        last_pop = details::os::now();
-        switch (incoming_async_msg.msg_type)
-        {
-        case async_msg_type::flush:
-            _flush_requested = true;
-            break;
-
-        case async_msg_type::terminate:
-            _flush_requested = true;
-            _terminate_requested = true;
-            break;
-
-        default:
-            log_msg incoming_log_msg;
-            incoming_async_msg.fill_log_msg(incoming_log_msg);
-            _formatter->format(incoming_log_msg);
-            for (auto &s : _sinks)
-                s->log(incoming_log_msg);
-        }
+        handle_flush_interval();
         return true;
     }
 
-    // Handle empty queue..
-    // This is the only place where the queue can terminate or flush to avoid losing messages already in the queue
-    else
+    switch (incoming_async_msg.msg_type)
     {
-        auto now = details::os::now();
-        handle_flush_interval(now, last_flush);
-        sleep_or_yield(now, last_pop);
-        return !_terminate_requested;
+    case async_msg_type::flush:
+        flush_sinks();
+        return true;
 
-    }
-}
+    case async_msg_type::terminate:
+        flush_sinks();
+        return false;
 
-// flush all sinks if _flush_interval_ms has expired
-inline void spdlog::details::async_log_helper::handle_flush_interval(log_clock::time_point& now, log_clock::time_point& last_flush)
-{
-    auto should_flush = _flush_requested || (_flush_interval_ms != std::chrono::milliseconds::zero() && now - last_flush >= _flush_interval_ms);
-    if (should_flush)
-    {
+    default:
+        log_msg incoming_log_msg;
+        incoming_async_msg.fill_log_msg(incoming_log_msg, &_logger_name);
+        _formatter->format(incoming_log_msg);
         for (auto &s : _sinks)
-            s->flush();
-        now = last_flush = details::os::now();
-        _flush_requested = false;
+        {
+            if (s->should_log(incoming_log_msg.level))
+            {
+                try
+                {
+                    s->log(incoming_log_msg);
+                }
+                SPDLOG_CATCH_AND_HANDLE
+            }
+        }
+        handle_flush_interval();
+        return true;
     }
+    assert(false);
+    return true; // should not be reached
 }
 
 inline void spdlog::details::async_log_helper::set_formatter(formatter_ptr msg_formatter)
 {
-    _formatter = msg_formatter;
+    _formatter = std::move(msg_formatter);
 }
 
-
-// spin, yield or sleep. use the time passed since last message as a hint
-inline void spdlog::details::async_log_helper::sleep_or_yield(const spdlog::log_clock::time_point& now, const spdlog::log_clock::time_point& last_op_time)
+inline void spdlog::details::async_log_helper::set_error_handler(spdlog::log_err_handler err_handler)
 {
-    using namespace std::this_thread;
-    using std::chrono::milliseconds;
-    using std::chrono::microseconds;
-
-    auto time_since_op = now - last_op_time;
-
-    // spin upto 50 micros
-    if (time_since_op <= microseconds(50))
-        return;
-
-    // yield upto 150 micros
-    if (time_since_op <= microseconds(100))
-        return yield();
-
-
-    // sleep for 20 ms upto 200 ms
-    if (time_since_op <= milliseconds(200))
-        return sleep_for(milliseconds(20));
-
-    // sleep for 200 ms
-    return sleep_for(milliseconds(200));
+    _err_handler = std::move(err_handler);
 }
 
-// throw if the worker thread threw an exception or not active
-inline void spdlog::details::async_log_helper::throw_if_bad_worker()
+// flush all sinks if _flush_interval_ms has expired.
+inline void spdlog::details::async_log_helper::handle_flush_interval()
 {
-    if (_last_workerthread_ex)
+    if (_flush_interval_ms == std::chrono::milliseconds::zero())
     {
-        auto ex = std::move(_last_workerthread_ex);
-        throw *ex;
+        return;
+    }
+    auto delta = details::os::now() - _last_flush;
+    ;
+    if (delta >= _flush_interval_ms)
+    {
+        flush_sinks();
     }
 }
 
+// flush all sinks if _flush_interval_ms has expired. only called if queue is empty
+inline void spdlog::details::async_log_helper::flush_sinks()
+{
 
-
-
-
-
-
+    for (auto &s : _sinks)
+    {
+        try
+        {
+            s->flush();
+        }
+        SPDLOG_CATCH_AND_HANDLE
+    }
+    _last_flush = os::now();
+}

include/spdlog/details/async_logger_impl.h

@@ -8,70 +8,88 @@
 // Async Logger implementation
 // Use an async_sink (queue per logger) to perform the logging in a worker thread
 
-#include <spdlog/details/async_log_helper.h>
-#include <spdlog/async_logger.h>
+#include "../async_logger.h"
+#include "../details/async_log_helper.h"
 
-#include <string>
-#include <functional>
 #include <chrono>
+#include <functional>
 #include <memory>
+#include <string>
 
 template<class It>
-inline spdlog::async_logger::async_logger(const std::string& logger_name,
-        const It& begin,
-        const It& end,
-        size_t queue_size,
-        const  async_overflow_policy overflow_policy,
-        const std::function<void()>& worker_warmup_cb,
-        const std::chrono::milliseconds& flush_interval_ms,
-        const std::function<void()>& worker_teardown_cb) :
-    logger(logger_name, begin, end),
-    _async_log_helper(new details::async_log_helper(_formatter, _sinks, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb))
+inline spdlog::async_logger::async_logger(const std::string &logger_name, const It &begin, const It &end, size_t queue_size,
+    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
+    : logger(logger_name, begin, end)
+    , _async_log_helper(new details::async_log_helper(logger_name, _formatter, _sinks, queue_size, _err_handler, overflow_policy,
+          worker_warmup_cb, flush_interval_ms, worker_teardown_cb))
 {
 }
 
-inline spdlog::async_logger::async_logger(const std::string& logger_name,
-        sinks_init_list sinks,
-        size_t queue_size,
-        const  async_overflow_policy overflow_policy,
-        const std::function<void()>& worker_warmup_cb,
-        const std::chrono::milliseconds& flush_interval_ms,
-        const std::function<void()>& worker_teardown_cb) :
-    async_logger(logger_name, sinks.begin(), sinks.end(), queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb) {}
-
-inline spdlog::async_logger::async_logger(const std::string& logger_name,
-        sink_ptr single_sink,
-        size_t queue_size,
-        const  async_overflow_policy overflow_policy,
-        const std::function<void()>& worker_warmup_cb,
-        const std::chrono::milliseconds& flush_interval_ms,
-        const std::function<void()>& worker_teardown_cb) :
-    async_logger(logger_name,
+inline spdlog::async_logger::async_logger(const std::string &logger_name, sinks_init_list sinks_list, size_t queue_size,
+    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
+    : async_logger(logger_name, sinks_list.begin(), sinks_list.end(), queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms,
+          worker_teardown_cb)
 {
-    single_sink
-}, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb) {}
+}
 
+inline spdlog::async_logger::async_logger(const std::string &logger_name, sink_ptr single_sink, size_t queue_size,
+    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
+    : async_logger(
+          logger_name, {std::move(single_sink)}, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb)
+{
+}
 
 inline void spdlog::async_logger::flush()
 {
-
     _async_log_helper->flush();
 }
 
+// Error handler
+inline void spdlog::async_logger::set_error_handler(spdlog::log_err_handler err_handler)
+{
+    _err_handler = err_handler;
+    _async_log_helper->set_error_handler(err_handler);
+}
+inline spdlog::log_err_handler spdlog::async_logger::error_handler()
+{
+    return _err_handler;
+}
+
 inline void spdlog::async_logger::_set_formatter(spdlog::formatter_ptr msg_formatter)
 {
     _formatter = msg_formatter;
     _async_log_helper->set_formatter(_formatter);
 }
 
-inline void spdlog::async_logger::_set_pattern(const std::string& pattern)
+inline void spdlog::async_logger::_set_pattern(const std::string &pattern, pattern_time_type pattern_time)
 {
-    _formatter = std::make_shared<pattern_formatter>(pattern);
+    _formatter = std::make_shared<pattern_formatter>(pattern, pattern_time);
     _async_log_helper->set_formatter(_formatter);
 }
 
-
-inline void spdlog::async_logger::_sink_it(details::log_msg& msg)
+inline void spdlog::async_logger::_sink_it(details::log_msg &msg)
 {
-    _async_log_helper->log(msg);
+    try
+    {
+#if defined(SPDLOG_ENABLE_MESSAGE_COUNTER)
+        _incr_msg_counter(msg);
+#endif
+        _async_log_helper->log(msg);
+        if (_should_flush_on(msg))
+        {
+            _async_log_helper->flush(); // do async flush
+        }
+    }
+    catch (const std::exception &ex)
+    {
+        _err_handler(ex.what());
+    }
+    catch (...)
+    {
+        _err_handler("Unknown exception in logger " + _name);
+        throw;
+    }
 }

include/spdlog/details/file_helper.h

@@ -7,22 +7,20 @@
 
 // Helper class for file sink
 // When failing to open a file, retry several times(5) with small delay between the tries(10 ms)
-// Can be set to auto flush on every line
 // Throw spdlog_ex exception on errors
 
-#include <spdlog/details/os.h>
-#include <spdlog/details/log_msg.h>
+#include "../details/log_msg.h"
+#include "../details/os.h"
 
+#include <cerrno>
 #include <chrono>
 #include <cstdio>
 #include <string>
 #include <thread>
-#include <cerrno>
+#include <tuple>
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 
 class file_helper
 {
@@ -31,32 +29,29 @@ public:
     const int open_tries = 5;
     const int open_interval = 10;
 
-    explicit file_helper(bool force_flush) :
-        _fd(nullptr),
-        _force_flush(force_flush)
-    {}
+    explicit file_helper() = default;
 
-    file_helper(const file_helper&) = delete;
-    file_helper& operator=(const file_helper&) = delete;
+    file_helper(const file_helper &) = delete;
+    file_helper &operator=(const file_helper &) = delete;
 
     ~file_helper()
     {
         close();
     }
 
-
-    void open(const filename_t& fname, bool truncate = false)
+    void open(const filename_t &fname, bool truncate = false)
     {
-
         close();
         auto *mode = truncate ? SPDLOG_FILENAME_T("wb") : SPDLOG_FILENAME_T("ab");
         _filename = fname;
         for (int tries = 0; tries < open_tries; ++tries)
         {
             if (!os::fopen_s(&_fd, fname, mode))
+            {
                 return;
+            }
 
-            std::this_thread::sleep_for(std::chrono::milliseconds(open_interval));
+            details::os::sleep_for_millis(open_interval);
         }
 
         throw spdlog_ex("Failed opening file " + os::filename_to_str(_filename) + " for writing", errno);
@@ -65,9 +60,10 @@ public:
     void reopen(bool truncate)
     {
         if (_filename.empty())
+        {
             throw spdlog_ex("Failed re opening file - was not opened before");
+        }
         open(_filename, truncate);
-
     }
 
     void flush()
@@ -77,47 +73,79 @@ public:
 
     void close()
     {
-        if (_fd)
+        if (_fd != nullptr)
         {
             std::fclose(_fd);
             _fd = nullptr;
         }
     }
 
-    void write(const log_msg& msg)
+    void write(const log_msg &msg)
     {
-
         size_t msg_size = msg.formatted.size();
         auto data = msg.formatted.data();
         if (std::fwrite(data, 1, msg_size, _fd) != msg_size)
+        {
             throw spdlog_ex("Failed writing to file " + os::filename_to_str(_filename), errno);
-
-        if (_force_flush)
-            std::fflush(_fd);
+        }
     }
 
-    size_t size()
+    size_t size() const
     {
-        if (!_fd)
+        if (_fd == nullptr)
+        {
             throw spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(_filename));
-		return os::filesize(_fd); 
+        }
+        return os::filesize(_fd);
     }
 
-    const filename_t& filename() const
+    const filename_t &filename() const
     {
         return _filename;
     }
 
-    static bool file_exists(const filename_t& name)
+    static bool file_exists(const filename_t &fname)
     {
+        return os::file_exists(fname);
+    }
 
-        return os::file_exists(name);
+    //
+    // return file path and its extension:
+    //
+    // "mylog.txt" => ("mylog", ".txt")
+    // "mylog" => ("mylog", "")
+    // "mylog." => ("mylog.", "")
+    // "/dir1/dir2/mylog.txt" => ("/dir1/dir2/mylog", ".txt")
+    //
+    // the starting dot in filenames is ignored (hidden files):
+    //
+    // ".mylog" => (".mylog". "")
+    // "my_folder/.mylog" => ("my_folder/.mylog", "")
+    // "my_folder/.mylog.txt" => ("my_folder/.mylog", ".txt")
+    static std::tuple<filename_t, filename_t> split_by_extenstion(const spdlog::filename_t &fname)
+    {
+        auto ext_index = fname.rfind('.');
+
+        // no valid extension found - return whole path and empty string as extension
+        if (ext_index == filename_t::npos || ext_index == 0 || ext_index == fname.size() - 1)
+        {
+            return std::make_tuple(fname, spdlog::filename_t());
+        }
+
+        // treat casese like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
+        auto folder_index = fname.rfind(details::os::folder_sep);
+        if (folder_index != fname.npos && folder_index >= ext_index - 1)
+        {
+            return std::make_tuple(fname, spdlog::filename_t());
+        }
+
+        // finally - return a valid base and extension tuple
+        return std::make_tuple(fname.substr(0, ext_index), fname.substr(ext_index));
     }
 
 private:
-    FILE* _fd;
+    FILE *_fd{nullptr};
     filename_t _filename;
-    bool _force_flush;
 };
-}
-}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg.h

@@ -5,21 +5,20 @@
 
 #pragma once
 
-#include <spdlog/common.h>
-#include <spdlog/details/os.h>
-
+#include "../common.h"
+#include "../details/os.h"
 
 #include <string>
 #include <utility>
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 struct log_msg
 {
     log_msg() = default;
-    log_msg(const std::string *loggers_name, level::level_enum lvl) : logger_name(loggers_name), level(lvl)
+    log_msg(const std::string *loggers_name, level::level_enum lvl)
+        : logger_name(loggers_name)
+        , level(lvl)
     {
 #ifndef SPDLOG_NO_DATETIME
         time = os::now();
@@ -30,17 +29,20 @@ struct log_msg
 #endif
     }
 
-    log_msg(const log_msg& other)  = delete;
-    log_msg& operator=(log_msg&& other) = delete;
-    log_msg(log_msg&& other) = delete;
+    log_msg(const log_msg &other) = delete;
+    log_msg &operator=(log_msg &&other) = delete;
+    log_msg(log_msg &&other) = delete;
 
-
-    const std::string *logger_name;
+    const std::string *logger_name{nullptr};
     level::level_enum level;
     log_clock::time_point time;
     size_t thread_id;
     fmt::MemoryWriter raw;
     fmt::MemoryWriter formatted;
+    size_t msg_id{0};
+    // wrap this range with color codes
+    size_t color_range_start{0};
+    size_t color_range_end{0};
 };
-}
-}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/logger_impl.h

@@ -5,7 +5,7 @@
 
 #pragma once
 
-#include <spdlog/logger.h>
+#include "../logger.h"
 
 #include <memory>
 #include <string>
@@ -13,169 +13,231 @@
 // create logger with given name, sinks and the default pattern formatter
 // all other ctors will call this one
 template<class It>
-inline spdlog::logger::logger(const std::string& logger_name, const It& begin, const It& end) :
-    _name(logger_name),
-    _sinks(begin, end),
-    _formatter(std::make_shared<pattern_formatter>("%+"))
+inline spdlog::logger::logger(std::string logger_name, const It &begin, const It &end)
+    : _name(std::move(logger_name))
+    , _sinks(begin, end)
+    , _formatter(std::make_shared<pattern_formatter>("%+"))
+    , _level(level::info)
+    , _flush_level(level::off)
+    , _last_err_time(0)
+    , _msg_counter(1) // message counter will start from 1. 0-message id will be reserved for controll messages
 {
-
-    // no support under vs2013 for member initialization for std::atomic
-    _level = level::info;
-    _flush_level = level::off;
+    _err_handler = [this](const std::string &msg) { this->_default_err_handler(msg); };
 }
 
 // ctor with sinks as init list
-inline spdlog::logger::logger(const std::string& logger_name, sinks_init_list sinks_list) :
-    logger(logger_name, sinks_list.begin(), sinks_list.end()) {}
-
+inline spdlog::logger::logger(const std::string &logger_name, sinks_init_list sinks_list)
+    : logger(logger_name, sinks_list.begin(), sinks_list.end())
+{
+}
 
 // ctor with single sink
-inline spdlog::logger::logger(const std::string& logger_name, spdlog::sink_ptr single_sink) :
-    logger(logger_name,
+inline spdlog::logger::logger(const std::string &logger_name, spdlog::sink_ptr single_sink)
+    : logger(logger_name, {std::move(single_sink)})
 {
-    single_sink
-}) {}
-
+}
 
 inline spdlog::logger::~logger() = default;
 
-
 inline void spdlog::logger::set_formatter(spdlog::formatter_ptr msg_formatter)
 {
-    _set_formatter(msg_formatter);
+    _set_formatter(std::move(msg_formatter));
 }
 
-inline void spdlog::logger::set_pattern(const std::string& pattern)
+inline void spdlog::logger::set_pattern(const std::string &pattern, pattern_time_type pattern_time)
 {
-    _set_pattern(pattern);
+    _set_pattern(pattern, pattern_time);
 }
 
-
-template <typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const char* fmt, const Args&... args)
+template<typename... Args>
+inline void spdlog::logger::log(level::level_enum lvl, const char *fmt, const Args &... args)
 {
-    if (!should_log(lvl)) return;
+    if (!should_log(lvl))
+    {
+        return;
+    }
 
-    details::log_msg log_msg(&_name, lvl);
     try
     {
+        details::log_msg log_msg(&_name, lvl);
+
+#if defined(SPDLOG_FMT_PRINTF)
+        fmt::printf(log_msg.raw, fmt, args...);
+#else
         log_msg.raw.write(fmt, args...);
+#endif
+        _sink_it(log_msg);
     }
-    catch (fmt::FormatError &ex)
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+template<typename... Args>
+inline void spdlog::logger::log(level::level_enum lvl, const char *msg)
+{
+    if (!should_log(lvl))
     {
-        throw spdlog::spdlog_ex(std::string("format error in \"") + fmt + "\": " + ex.what());
+        return;
     }
-
-    _sink_it(log_msg);
-
-}
-
-template <typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const char* msg)
-{
-    if (!should_log(lvl)) return;
-
-    details::log_msg log_msg(&_name, lvl);
-    log_msg.raw << msg;
-    _sink_it(log_msg);
-
+    try
+    {
+        details::log_msg log_msg(&_name, lvl);
+        log_msg.raw << msg;
+        _sink_it(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
 }
 
 template<typename T>
-inline void spdlog::logger::log(level::level_enum lvl, const T& msg)
+inline void spdlog::logger::log(level::level_enum lvl, const T &msg)
 {
-    if (!should_log(lvl)) return;
-
-    details::log_msg log_msg(&_name, lvl);
-    log_msg.raw << msg;
-    _sink_it(log_msg);
-
+    if (!should_log(lvl))
+    {
+        return;
+    }
+    try
+    {
+        details::log_msg log_msg(&_name, lvl);
+        log_msg.raw << msg;
+        _sink_it(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
 }
 
-
-template <typename... Args>
-inline void spdlog::logger::trace(const char* fmt, const Args&... args)
+template<typename Arg1, typename... Args>
+inline void spdlog::logger::trace(const char *fmt, const Arg1 &arg1, const Args &... args)
 {
-    log(level::trace, fmt, args...);
+    log(level::trace, fmt, arg1, args...);
 }
 
-template <typename... Args>
-inline void spdlog::logger::debug(const char* fmt, const Args&... args)
+template<typename Arg1, typename... Args>
+inline void spdlog::logger::debug(const char *fmt, const Arg1 &arg1, const Args &... args)
 {
-    log(level::debug, fmt, args...);
+    log(level::debug, fmt, arg1, args...);
 }
 
-template <typename... Args>
-inline void spdlog::logger::info(const char* fmt, const Args&... args)
+template<typename Arg1, typename... Args>
+inline void spdlog::logger::info(const char *fmt, const Arg1 &arg1, const Args &... args)
 {
-    log(level::info, fmt, args...);
+    log(level::info, fmt, arg1, args...);
 }
 
-
-template <typename... Args>
-inline void spdlog::logger::warn(const char* fmt, const Args&... args)
+template<typename Arg1, typename... Args>
+inline void spdlog::logger::warn(const char *fmt, const Arg1 &arg1, const Args &... args)
 {
-    log(level::warn, fmt, args...);
+    log(level::warn, fmt, arg1, args...);
 }
 
-template <typename... Args>
-inline void spdlog::logger::error(const char* fmt, const Args&... args)
+template<typename Arg1, typename... Args>
+inline void spdlog::logger::error(const char *fmt, const Arg1 &arg1, const Args &... args)
 {
-    log(level::err, fmt, args...);
+    log(level::err, fmt, arg1, args...);
 }
 
-template <typename... Args>
-inline void spdlog::logger::critical(const char* fmt, const Args&... args)
+template<typename Arg1, typename... Args>
+inline void spdlog::logger::critical(const char *fmt, const Arg1 &arg1, const Args &... args)
 {
-    log(level::critical, fmt, args...);
+    log(level::critical, fmt, arg1, args...);
 }
 
-
 template<typename T>
-inline void spdlog::logger::trace(const T& msg)
+inline void spdlog::logger::trace(const T &msg)
 {
     log(level::trace, msg);
 }
 
 template<typename T>
-inline void spdlog::logger::debug(const T& msg)
+inline void spdlog::logger::debug(const T &msg)
 {
     log(level::debug, msg);
 }
 
-
 template<typename T>
-inline void spdlog::logger::info(const T& msg)
+inline void spdlog::logger::info(const T &msg)
 {
     log(level::info, msg);
 }
 
-
 template<typename T>
-inline void spdlog::logger::warn(const T& msg)
+inline void spdlog::logger::warn(const T &msg)
 {
     log(level::warn, msg);
 }
 
 template<typename T>
-inline void spdlog::logger::error(const T& msg)
+inline void spdlog::logger::error(const T &msg)
 {
     log(level::err, msg);
 }
 
 template<typename T>
-inline void spdlog::logger::critical(const T& msg)
+inline void spdlog::logger::critical(const T &msg)
 {
     log(level::critical, msg);
 }
 
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+#include <codecvt>
+#include <locale>
 
+template<typename... Args>
+inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *msg)
+{
+    std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
 
+    log(lvl, conv.to_bytes(msg));
+}
+
+template<typename... Args>
+inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *fmt, const Args &... args)
+{
+    fmt::WMemoryWriter wWriter;
+
+    wWriter.write(fmt, args...);
+    log(lvl, wWriter.c_str());
+}
+
+template<typename... Args>
+inline void spdlog::logger::trace(const wchar_t *fmt, const Args &... args)
+{
+    log(level::trace, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::debug(const wchar_t *fmt, const Args &... args)
+{
+    log(level::debug, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::info(const wchar_t *fmt, const Args &... args)
+{
+    log(level::info, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::warn(const wchar_t *fmt, const Args &... args)
+{
+    log(level::warn, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::error(const wchar_t *fmt, const Args &... args)
+{
+    log(level::err, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::critical(const wchar_t *fmt, const Args &... args)
+{
+    log(level::critical, fmt, args...);
+}
+
+#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
 
 //
 // name and level
 //
-inline const std::string& spdlog::logger::name() const
+inline const std::string &spdlog::logger::name() const
 {
     return _name;
 }
@@ -185,6 +247,16 @@ inline void spdlog::logger::set_level(spdlog::level::level_enum log_level)
     _level.store(log_level);
 }
 
+inline void spdlog::logger::set_error_handler(spdlog::log_err_handler err_handler)
+{
+    _err_handler = std::move(err_handler);
+}
+
+inline spdlog::log_err_handler spdlog::logger::error_handler()
+{
+    return _err_handler;
+}
+
 inline void spdlog::logger::flush_on(level::level_enum log_level)
 {
     _flush_level.store(log_level);
@@ -203,28 +275,74 @@ inline bool spdlog::logger::should_log(spdlog::level::level_enum msg_level) cons
 //
 // protected virtual called at end of each user log call (if enabled) by the line_logger
 //
-inline void spdlog::logger::_sink_it(details::log_msg& msg)
+inline void spdlog::logger::_sink_it(details::log_msg &msg)
 {
+#if defined(SPDLOG_ENABLE_MESSAGE_COUNTER)
+    _incr_msg_counter(msg);
+#endif
     _formatter->format(msg);
     for (auto &sink : _sinks)
-        sink->log(msg);
+    {
+        if (sink->should_log(msg.level))
+        {
+            sink->log(msg);
+        }
+    }
 
-    const auto flush_level = _flush_level.load(std::memory_order_relaxed);
-    if (msg.level >= flush_level)
+    if (_should_flush_on(msg))
+    {
         flush();
+    }
 }
 
-inline void spdlog::logger::_set_pattern(const std::string& pattern)
+inline void spdlog::logger::_set_pattern(const std::string &pattern, pattern_time_type pattern_time)
 {
-    _formatter = std::make_shared<pattern_formatter>(pattern);
+    _formatter = std::make_shared<pattern_formatter>(pattern, pattern_time);
 }
+
 inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
 {
-    _formatter = msg_formatter;
+    _formatter = std::move(msg_formatter);
 }
 
 inline void spdlog::logger::flush()
 {
-    for (auto& sink : _sinks)
-        sink->flush();
+    try
+    {
+        for (auto &sink : _sinks)
+        {
+            sink->flush();
+        }
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+inline void spdlog::logger::_default_err_handler(const std::string &msg)
+{
+    auto now = time(nullptr);
+    if (now - _last_err_time < 60)
+    {
+        return;
+    }
+    _last_err_time = now;
+    auto tm_time = details::os::localtime(now);
+    char date_buf[100];
+    std::strftime(date_buf, sizeof(date_buf), "%Y-%m-%d %H:%M:%S", &tm_time);
+    fmt::print(stderr, "[*** LOG ERROR ***] [{}] [{}] {}\n", date_buf, name(), msg);
+}
+
+inline bool spdlog::logger::_should_flush_on(const details::log_msg &msg)
+{
+    const auto flush_level = _flush_level.load(std::memory_order_relaxed);
+    return (msg.level >= flush_level) && (msg.level != level::off);
+}
+
+inline void spdlog::logger::_incr_msg_counter(details::log_msg &msg)
+{
+    msg.msg_id = _msg_counter.fetch_add(1, std::memory_order_relaxed);
+}
+
+inline const std::vector<spdlog::sink_ptr> &spdlog::logger::sinks() const
+{
+    return _sinks;
 }

include/spdlog/details/mpmc_blocking_q.h

@@ -0,0 +1,84 @@
+#pragma once
+
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+// async log helper :
+// multi producer-multi consumer blocking queue
+// enqueue(..) - will block until room found to put the new message
+// enqueue_nowait(..) - will return immediatly with false if no room left in the queue
+// dequeue_for(..) - will block until the queue is not empty or timeout passed
+
+#include <condition_variable>
+#include <mutex>
+#include <queue>
+
+namespace spdlog {
+namespace details {
+
+template<typename T>
+class mpmc_bounded_queue
+{
+public:
+    using item_type = T;
+    explicit mpmc_bounded_queue(size_t max_items)
+        : max_items_(max_items)
+    {
+    }
+
+    // try to enqueue and block if no room left
+    void enqueue(T &&item)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            pop_cv_.wait(lock, [this] { return this->q_.size() < this->max_items_; });
+            q_.push(std::move(item));
+        }
+        push_cv_.notify_one();
+    }
+
+    // try to enqueue and return immdeialty false if no room left
+    bool enqueue_nowait(T &&item)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            if (q_.size() == this->max_items_)
+            {
+                return false;
+            }
+            q_.push(std::forward<T>(item));
+        }
+        push_cv_.notify_one();
+        return true;
+    }
+
+    // try to dequeue item. if no item found. wait upto timeout and try again
+    // Return true, if succeeded dequeue item, false otherwise
+    bool dequeue_for(T &popped_item, std::chrono::milliseconds wait_duration)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            if (!push_cv_.wait_for(lock, wait_duration, [this] { return this->q_.size() > 0; }))
+            {
+                return false;
+            }
+
+            popped_item = std::move(q_.front());
+            q_.pop();
+        }
+        pop_cv_.notify_one();
+        return true;
+    }
+
+private:
+    size_t max_items_;
+    std::mutex queue_mutex_;
+    std::condition_variable push_cv_;
+    std::condition_variable pop_cv_;
+
+    std::queue<T> q_;
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/mpmc_bounded_q.h

@@ -1,159 +0,0 @@
-/*
-A modified version of Bounded MPMC queue by Dmitry Vyukov.
-
-Original code from:
-http://www.1024cores.net/home/lock-free-algorithms/queues/bounded-mpmc-queue
-
-licensed by Dmitry Vyukov under the terms below:
-
-Simplified BSD license
-
-Copyright (c) 2010-2011 Dmitry Vyukov. All rights reserved.
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-1. Redistributions of source code must retain the above copyright notice, this list of
-conditions and the following disclaimer.
-
-2. Redistributions in binary form must reproduce the above copyright notice, this list
-of conditions and the following disclaimer in the documentation and/or other materials
-provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY DMITRY VYUKOV "AS IS" AND ANY EXPRESS OR IMPLIED
-WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
-SHALL DMITRY VYUKOV OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
-OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-The views and conclusions contained in the software and documentation are those of the authors and
-should not be interpreted as representing official policies, either expressed or implied, of Dmitry Vyukov.
-*/
-
-/*
-The code in its current form adds the license below:
-
-Copyright(c) 2015 Gabi Melman.
-Distributed under the MIT License (http://opensource.org/licenses/MIT)
-
-*/
-
-#pragma once
-
-#include <spdlog/common.h>
-
-#include <atomic>
-#include <utility>
-
-namespace spdlog
-{
-namespace details
-{
-
-template<typename T>
-class mpmc_bounded_queue
-{
-public:
-
-    using item_type = T;
-    mpmc_bounded_queue(size_t buffer_size)
-        : buffer_(new cell_t [buffer_size]),
-          buffer_mask_(buffer_size - 1)
-    {
-        //queue size must be power of two
-        if(!((buffer_size >= 2) && ((buffer_size & (buffer_size - 1)) == 0)))
-            throw spdlog_ex("async logger queue size must be power of two");
-
-        for (size_t i = 0; i != buffer_size; i += 1)
-            buffer_[i].sequence_.store(i, std::memory_order_relaxed);
-        enqueue_pos_.store(0, std::memory_order_relaxed);
-        dequeue_pos_.store(0, std::memory_order_relaxed);
-    }
-
-    ~mpmc_bounded_queue()
-    {
-        delete [] buffer_;
-    }
-
-
-    bool enqueue(T&& data)
-    {
-        cell_t* cell;
-        size_t pos = enqueue_pos_.load(std::memory_order_relaxed);
-        for (;;)
-        {
-            cell = &buffer_[pos & buffer_mask_];
-            size_t seq = cell->sequence_.load(std::memory_order_acquire);
-            intptr_t dif = (intptr_t)seq - (intptr_t)pos;
-            if (dif == 0)
-            {
-                if (enqueue_pos_.compare_exchange_weak(pos, pos + 1, std::memory_order_relaxed))
-                    break;
-            }
-            else if (dif < 0)
-            {
-                return false;
-            }
-            else
-            {
-                pos = enqueue_pos_.load(std::memory_order_relaxed);
-            }
-        }
-        cell->data_ = std::move(data);
-        cell->sequence_.store(pos + 1, std::memory_order_release);
-        return true;
-    }
-
-    bool dequeue(T& data)
-    {
-        cell_t* cell;
-        size_t pos = dequeue_pos_.load(std::memory_order_relaxed);
-        for (;;)
-        {
-            cell = &buffer_[pos & buffer_mask_];
-            size_t seq =
-                cell->sequence_.load(std::memory_order_acquire);
-            intptr_t dif = (intptr_t)seq - (intptr_t)(pos + 1);
-            if (dif == 0)
-            {
-                if (dequeue_pos_.compare_exchange_weak(pos, pos + 1, std::memory_order_relaxed))
-                    break;
-            }
-            else if (dif < 0)
-                return false;
-            else
-                pos = dequeue_pos_.load(std::memory_order_relaxed);
-        }
-        data = std::move(cell->data_);
-        cell->sequence_.store(pos + buffer_mask_ + 1, std::memory_order_release);
-        return true;
-    }
-
-private:
-    struct cell_t
-    {
-        std::atomic<size_t>   sequence_;
-        T                     data_;
-    };
-
-    static size_t const     cacheline_size = 64;
-    typedef char            cacheline_pad_t [cacheline_size];
-
-    cacheline_pad_t         pad0_;
-    cell_t* const           buffer_;
-    size_t const            buffer_mask_;
-    cacheline_pad_t         pad1_;
-    std::atomic<size_t>     enqueue_pos_;
-    cacheline_pad_t         pad2_;
-    std::atomic<size_t>     dequeue_pos_;
-    cacheline_pad_t         pad3_;
-
-    mpmc_bounded_queue(mpmc_bounded_queue const&);
-    void operator = (mpmc_bounded_queue const&);
-};
-
-} // ns details
-} // ns spdlog

include/spdlog/details/null_mutex.h

@@ -8,10 +8,8 @@
 #include <atomic>
 // null, no cost dummy "mutex" and dummy "atomic" int
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 struct null_mutex
 {
     void lock() {}
@@ -27,8 +25,10 @@ struct null_atomic_int
     int value;
     null_atomic_int() = default;
 
-    null_atomic_int(int val):value(val)
-    {}
+    explicit null_atomic_int(int val)
+        : value(val)
+    {
+    }
 
     int load(std::memory_order) const
     {
@@ -41,5 +41,5 @@ struct null_atomic_int
     }
 };
 
-}
-}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/os.h

@@ -4,52 +4,58 @@
 //
 #pragma once
 
-#include <spdlog/common.h>
+#include "../common.h"
 
+#include <algorithm>
+#include <chrono>
 #include <cstdio>
+#include <cstdlib>
+#include <cstring>
 #include <ctime>
 #include <functional>
 #include <string>
-#include <stdio.h>
-#include <string.h>
 #include <sys/stat.h>
-
+#include <sys/types.h>
+#include <thread>
 
 #ifdef _WIN32
 
 #ifndef NOMINMAX
-#define NOMINMAX //prevent windows redefining min/max
+#define NOMINMAX // prevent windows redefining min/max
 #endif
 
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <io.h>      // _get_osfhandle and _isatty support
+#include <process.h> //  _get_pid support
 #include <windows.h>
 
 #ifdef __MINGW32__
 #include <share.h>
 #endif
 
-#include <sys/types.h>
+#else // unix
 
-#elif __linux__
-
-#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
+#include <fcntl.h>
 #include <unistd.h>
-#include <chrono>
 
-#else
-
-#include <thread>
+#ifdef __linux__
+#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
 
+#elif __FreeBSD__
+#include <sys/thr.h> //Use thr_self() syscall under FreeBSD to get thread id
 #endif
 
-namespace spdlog
-{
-namespace details
-{
-namespace os
-{
+#endif // unix
+
+#ifndef __has_feature      // Clang - feature checking macros.
+#define __has_feature(x) 0 // Compatibility with non-clang compilers.
+#endif
+
+namespace spdlog {
+namespace details {
+namespace os {
 
 inline spdlog::log_clock::time_point now()
 {
@@ -58,14 +64,11 @@ inline spdlog::log_clock::time_point now()
     timespec ts;
     ::clock_gettime(CLOCK_REALTIME_COARSE, &ts);
     return std::chrono::time_point<log_clock, typename log_clock::duration>(
-               std::chrono::duration_cast<typename log_clock::duration>(
-                   std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
-
+        std::chrono::duration_cast<typename log_clock::duration>(std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
 
 #else
     return log_clock::now();
 #endif
-
 }
 inline std::tm localtime(const std::time_t &time_tt)
 {
@@ -86,7 +89,6 @@ inline std::tm localtime()
     return localtime(now_t);
 }
 
-
 inline std::tm gmtime(const std::time_t &time_tt)
 {
 
@@ -105,24 +107,19 @@ inline std::tm gmtime()
     std::time_t now_t = time(nullptr);
     return gmtime(now_t);
 }
-inline bool operator==(const std::tm& tm1, const std::tm& tm2)
+inline bool operator==(const std::tm &tm1, const std::tm &tm2)
 {
-    return (tm1.tm_sec == tm2.tm_sec &&
-            tm1.tm_min == tm2.tm_min &&
-            tm1.tm_hour == tm2.tm_hour &&
-            tm1.tm_mday == tm2.tm_mday &&
-            tm1.tm_mon == tm2.tm_mon &&
-            tm1.tm_year == tm2.tm_year &&
-            tm1.tm_isdst == tm2.tm_isdst);
+    return (tm1.tm_sec == tm2.tm_sec && tm1.tm_min == tm2.tm_min && tm1.tm_hour == tm2.tm_hour && tm1.tm_mday == tm2.tm_mday &&
+            tm1.tm_mon == tm2.tm_mon && tm1.tm_year == tm2.tm_year && tm1.tm_isdst == tm2.tm_isdst);
 }
 
-inline bool operator!=(const std::tm& tm1, const std::tm& tm2)
+inline bool operator!=(const std::tm &tm1, const std::tm &tm2)
 {
     return !(tm1 == tm2);
 }
 
 // eol definition
-#if !defined (SPDLOG_EOL)
+#if !defined(SPDLOG_EOL)
 #ifdef _WIN32
 #define SPDLOG_EOL "\r\n"
 #else
@@ -130,13 +127,35 @@ inline bool operator!=(const std::tm& tm1, const std::tm& tm2)
 #endif
 #endif
 
-SPDLOG_CONSTEXPR static const char* eol = SPDLOG_EOL;
-SPDLOG_CONSTEXPR static int eol_size = sizeof(SPDLOG_EOL) - 1;
+SPDLOG_CONSTEXPR static const char *default_eol = SPDLOG_EOL;
 
+// folder separator
+#ifdef _WIN32
+SPDLOG_CONSTEXPR static const char folder_sep = '\\';
+#else
+SPDLOG_CONSTEXPR static const char folder_sep = '/';
+#endif
 
+inline void prevent_child_fd(FILE *f)
+{
 
-//fopen_s on non windows for writing
-inline int fopen_s(FILE** fp, const filename_t& filename, const filename_t& mode)
+#ifdef _WIN32
+#if !defined(__cplusplus_winrt)
+    auto file_handle = (HANDLE)_get_osfhandle(_fileno(f));
+    if (!::SetHandleInformation(file_handle, HANDLE_FLAG_INHERIT, 0))
+        throw spdlog_ex("SetHandleInformation failed", errno);
+#endif
+#else
+    auto fd = fileno(f);
+    if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+    {
+        throw spdlog_ex("fcntl with FD_CLOEXEC failed", errno);
+    }
+#endif
+}
+
+// fopen_s on non windows for writing
+inline bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
 {
 #ifdef _WIN32
 #ifdef SPDLOG_WCHAR_FILENAMES
@@ -144,11 +163,17 @@ inline int fopen_s(FILE** fp, const filename_t& filename, const filename_t& mode
 #else
     *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
 #endif
-    return *fp == nullptr;
-#else
+#else // unix
     *fp = fopen((filename.c_str()), mode.c_str());
-    return *fp == nullptr;
 #endif
+
+#ifdef SPDLOG_PREVENT_CHILD_FD
+    if (*fp != nullptr)
+    {
+        prevent_child_fd(*fp);
+    }
+#endif
+    return *fp == nullptr;
 }
 
 inline int remove(const filename_t &filename)
@@ -160,7 +185,7 @@ inline int remove(const filename_t &filename)
 #endif
 }
 
-inline int rename(const filename_t& filename1, const filename_t& filename2)
+inline int rename(const filename_t &filename1, const filename_t &filename2)
 {
 #if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
     return _wrename(filename1.c_str(), filename2.c_str());
@@ -169,9 +194,8 @@ inline int rename(const filename_t& filename1, const filename_t& filename2)
 #endif
 }
 
-
-//Return if file exists
-inline bool file_exists(const filename_t& filename)
+// Return if file exists
+inline bool file_exists(const filename_t &filename)
 {
 #ifdef _WIN32
 #ifdef SPDLOG_WCHAR_FILENAMES
@@ -180,54 +204,59 @@ inline bool file_exists(const filename_t& filename)
     auto attribs = GetFileAttributesA(filename.c_str());
 #endif
     return (attribs != INVALID_FILE_ATTRIBUTES && !(attribs & FILE_ATTRIBUTE_DIRECTORY));
-#else //common linux/unix all have the stat system call
+#else // common linux/unix all have the stat system call
     struct stat buffer;
-    return (stat (filename.c_str(), &buffer) == 0);
+    return (stat(filename.c_str(), &buffer) == 0);
 #endif
 }
 
-
-
-
-//Return file size according to open FILE* object
+// Return file size according to open FILE* object
 inline size_t filesize(FILE *f)
 {
-	if (f == nullptr)
-		throw spdlog_ex("Failed getting file size. fd is null");
-#ifdef _WIN32
-	int fd = _fileno(f);
-#if _WIN64 //64 bits		
-	struct _stat64 st;	
-	if (_fstat64(fd, &st) == 0)
-		return st.st_size;
-			
-#else //windows 32 bits		
-	struct _stat st;
-	if (_fstat(fd, &st) == 0)
-		return st.st_size;
+    if (f == nullptr)
+    {
+        throw spdlog_ex("Failed getting file size. fd is null");
+    }
+#if defined(_WIN32) && !defined(__CYGWIN__)
+    int fd = _fileno(f);
+#if _WIN64 // 64 bits
+    struct _stat64 st;
+    if (_fstat64(fd, &st) == 0)
+    {
+        return st.st_size;
+    }
+
+#else // windows 32 bits
+    long ret = _filelength(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
 #endif
 
 #else // unix
-	int fd = fileno(f);
-	//64 bits(but not in osx, where fstat64 is deprecated)
-	#if !defined(__APPLE__) && (defined(__x86_64__) || defined(__ppc64__)) 
-	struct stat64 st;
-	if (fstat64(fd, &st) == 0)
-		return st.st_size;	
-#else // unix 32 bits or osx	
-	struct stat st;
-	if (fstat(fd, &st) == 0)
-		return st.st_size;	
+    int fd = fileno(f);
+    // 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
+#if !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__APPLE__) && !defined(__HAIKU__) && (defined(__x86_64__) || defined(__ppc64__)) && !defined(__CYGWIN__)
+    struct stat64 st;
+    if (fstat64(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
+#else // unix 32 bits or cygwin
+    struct stat st;
+
+    if (fstat(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
 #endif
 #endif
-	throw spdlog_ex("Failed getting file size from fd", errno);
+    throw spdlog_ex("Failed getting file size from fd", errno);
 }
 
-
-
-
-//Return utc offset in minutes or throw spdlog_ex on failure
-inline int utc_minutes_offset(const std::tm& tm = details::os::localtime())
+// Return utc offset in minutes or throw spdlog_ex on failure
+inline int utc_minutes_offset(const std::tm &tm = details::os::localtime())
 {
 
 #ifdef _WIN32
@@ -243,75 +272,160 @@ inline int utc_minutes_offset(const std::tm& tm = details::os::localtime())
 
     int offset = -tzinfo.Bias;
     if (tm.tm_isdst)
+    {
         offset -= tzinfo.DaylightBias;
+    }
     else
+    {
         offset -= tzinfo.StandardBias;
+    }
     return offset;
 #else
-    return static_cast<int>(tm.tm_gmtoff / 60);
+
+#if defined(sun) || defined(__sun) || defined(_AIX)
+    // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
+    struct helper
+    {
+        static long int calculate_gmt_offset(const std::tm &localtm = details::os::localtime(), const std::tm &gmtm = details::os::gmtime())
+        {
+            int local_year = localtm.tm_year + (1900 - 1);
+            int gmt_year = gmtm.tm_year + (1900 - 1);
+
+            long int days = (
+                // difference in day of year
+                localtm.tm_yday -
+                gmtm.tm_yday
+
+                // + intervening leap days
+                + ((local_year >> 2) - (gmt_year >> 2)) - (local_year / 100 - gmt_year / 100) +
+                ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
+
+                // + difference in years * 365 */
+                + (long int)(local_year - gmt_year) * 365);
+
+            long int hours = (24 * days) + (localtm.tm_hour - gmtm.tm_hour);
+            long int mins = (60 * hours) + (localtm.tm_min - gmtm.tm_min);
+            long int secs = (60 * mins) + (localtm.tm_sec - gmtm.tm_sec);
+
+            return secs;
+        }
+    };
+
+    auto offset_seconds = helper::calculate_gmt_offset(tm);
+#else
+    auto offset_seconds = tm.tm_gmtoff;
+#endif
+
+    return static_cast<int>(offset_seconds / 60);
 #endif
 }
 
-//Return current thread id as size_t
-//It exists because the std::this_thread::get_id() is much slower(espcially under VS 2013)
-inline size_t thread_id()
+// Return current thread id as size_t
+// It exists because the std::this_thread::get_id() is much slower(especially under VS 2013)
+inline size_t _thread_id()
 {
 #ifdef _WIN32
-    return  static_cast<size_t>(::GetCurrentThreadId());
+    return static_cast<size_t>(::GetCurrentThreadId());
 #elif __linux__
-# if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
-#  define SYS_gettid __NR_gettid
-# endif
-    return  static_cast<size_t>(syscall(SYS_gettid));
-#else //Default to standard C++11 (OSX and other Unix)
+#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+#define SYS_gettid __NR_gettid
+#endif
+    return static_cast<size_t>(syscall(SYS_gettid));
+#elif __FreeBSD__
+    long tid;
+    thr_self(&tid);
+    return static_cast<size_t>(tid);
+#elif __APPLE__
+    uint64_t tid;
+    pthread_threadid_np(nullptr, &tid);
+    return static_cast<size_t>(tid);
+#else // Default to standard C++11 (other Unix)
     return static_cast<size_t>(std::hash<std::thread::id>()(std::this_thread::get_id()));
 #endif
-
 }
 
+// Return current thread id as size_t (from thread local storage)
+inline size_t thread_id()
+{
+#if defined(SPDLOG_DISABLE_TID_CACHING) || (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt) ||                       \
+    (defined(__clang__) && !__has_feature(cxx_thread_local))
+    return _thread_id();
+#else // cache thread id in tls
+    static thread_local const size_t tid = _thread_id();
+    return tid;
+#endif
+}
+
+// This is avoid msvc issue in sleep_for that happens if the clock changes.
+// See https://github.com/gabime/spdlog/issues/609
+inline void sleep_for_millis(int milliseconds)
+{
+#if defined(_WIN32)
+    ::Sleep(milliseconds);
+#else
+    std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
+#endif
+}
 
 // wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
 #if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-#define SPDLOG_FILENAME_T(s) L ## s
-inline std::string filename_to_str(const filename_t& filename)
+#define SPDLOG_FILENAME_T(s) L##s
+inline std::string filename_to_str(const filename_t &filename)
 {
     std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> c;
     return c.to_bytes(filename);
 }
 #else
 #define SPDLOG_FILENAME_T(s) s
-inline std::string filename_to_str(const filename_t& filename)
+inline std::string filename_to_str(const filename_t &filename)
 {
     return filename;
 }
 #endif
 
-
-// Return errno string (thread safe)
-inline std::string errno_str(int err_num)
+inline int pid()
 {
-    char buf[256];
-    SPDLOG_CONSTEXPR auto buf_size = sizeof(buf);
 
 #ifdef _WIN32
-    if(strerror_s(buf, buf_size, err_num) == 0)
-        return std::string(buf);
-    else
-        return "Unkown error";
-
-#elif defined(__APPLE__) || ((_POSIX_C_SOURCE >= 200112L) && ! _GNU_SOURCE) // posix version        
-    if (strerror_r(err_num, buf, buf_size) == 0)
-        return std::string(buf);
-    else
-        return "Unkown error";
-
-#else  // gnu version (might not use the given buf, so its retval pointer must be used)
-    return std::string(strerror_r(err_num, buf, buf_size));
+    return static_cast<int>(::GetCurrentProcessId());
+#else
+    return static_cast<int>(::getpid());
 #endif
 }
 
-} //os
-} //details
-} //spdlog
+// Determine if the terminal supports colors
+// Source: https://github.com/agauniyal/rang/
+inline bool is_color_terminal()
+{
+#ifdef _WIN32
+    return true;
+#else
+    static constexpr const char *Terms[] = {
+        "ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux", "msys", "putty", "rxvt", "screen", "vt100", "xterm"};
 
+    const char *env_p = std::getenv("TERM");
+    if (env_p == nullptr)
+    {
+        return false;
+    }
 
+    static const bool result =
+        std::any_of(std::begin(Terms), std::end(Terms), [&](const char *term) { return std::strstr(env_p, term) != nullptr; });
+    return result;
+#endif
+}
+
+// Detrmine if the terminal attached
+// Source: https://github.com/agauniyal/rang/
+inline bool in_terminal(FILE *file)
+{
+
+#ifdef _WIN32
+    return _isatty(_fileno(file)) != 0;
+#else
+    return isatty(fileno(file)) != 0;
+#endif
+}
+} // namespace os
+} // namespace details
+} // namespace spdlog

include/spdlog/details/pattern_formatter_impl.h

@@ -5,11 +5,12 @@
 
 #pragma once
 
-#include <spdlog/formatter.h>
-#include <spdlog/details/log_msg.h>
-#include <spdlog/details/os.h>
-#include <spdlog/fmt/fmt.h>
+#include "../details/log_msg.h"
+#include "../details/os.h"
+#include "../fmt/fmt.h"
+#include "../formatter.h"
 
+#include <array>
 #include <chrono>
 #include <ctime>
 #include <memory>
@@ -19,44 +20,39 @@
 #include <utility>
 #include <vector>
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 class flag_formatter
 {
 public:
-    virtual ~flag_formatter() {}
-    virtual void format(details::log_msg& msg, const std::tm& tm_time) = 0;
+    virtual ~flag_formatter() = default;
+    virtual void format(details::log_msg &msg, const std::tm &tm_time) = 0;
 };
 
 ///////////////////////////////////////////////////////////////////////
 // name & level pattern appenders
 ///////////////////////////////////////////////////////////////////////
-namespace
+class name_formatter : public flag_formatter
 {
-class name_formatter :public flag_formatter
-{
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << *msg.logger_name;
     }
 };
-}
 
 // log level appender
-class level_formatter :public flag_formatter
+class level_formatter : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << level::to_str(msg.level);
     }
 };
 
 // short log level appender
-class short_level_formatter :public flag_formatter
+class short_level_formatter : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << level::to_short_str(msg.level);
     }
@@ -66,171 +62,166 @@ class short_level_formatter :public flag_formatter
 // Date time pattern appenders
 ///////////////////////////////////////////////////////////////////////
 
-static const char* ampm(const tm& t)
+static const char *ampm(const tm &t)
 {
     return t.tm_hour >= 12 ? "PM" : "AM";
 }
 
-static int to12h(const tm& t)
+static int to12h(const tm &t)
 {
     return t.tm_hour > 12 ? t.tm_hour - 12 : t.tm_hour;
 }
 
-//Abbreviated weekday name
-static const std::string days[] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
-class a_formatter :public flag_formatter
+// Abbreviated weekday name
+static const std::string days[]{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
+class a_formatter : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << days[tm_time.tm_wday];
     }
 };
 
-//Full weekday name
-static const std::string full_days[] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
-class A_formatter :public flag_formatter
+// Full weekday name
+static const std::string full_days[]{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
+class A_formatter : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << full_days[tm_time.tm_wday];
     }
 };
 
-//Abbreviated month
-static const std::string  months[] { "Jan", "Feb", "Mar", "Apr", "May", "June", "July", "Aug", "Sept", "Oct", "Nov", "Dec" };
-class b_formatter :public flag_formatter
+// Abbreviated month
+static const std::string months[]{"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"};
+class b_formatter : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
-        msg.formatted<< months[tm_time.tm_mon];
+        msg.formatted << months[tm_time.tm_mon];
     }
 };
 
-//Full month name
-static const std::string full_months[] { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
-class B_formatter :public flag_formatter
+// Full month name
+static const std::string full_months[]{
+    "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
+class B_formatter : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << full_months[tm_time.tm_mon];
     }
 };
 
-
-//write 2 ints seperated by sep with padding of 2
-static fmt::MemoryWriter& pad_n_join(fmt::MemoryWriter& w, int v1, int v2, char sep)
+// write 2 ints separated by sep with padding of 2
+static fmt::MemoryWriter &pad_n_join(fmt::MemoryWriter &w, int v1, int v2, char sep)
 {
     w << fmt::pad(v1, 2, '0') << sep << fmt::pad(v2, 2, '0');
     return w;
 }
 
-//write 3 ints seperated by sep with padding of 2
-static fmt::MemoryWriter& pad_n_join(fmt::MemoryWriter& w, int v1, int v2, int v3, char sep)
+// write 3 ints separated by sep with padding of 2
+static fmt::MemoryWriter &pad_n_join(fmt::MemoryWriter &w, int v1, int v2, int v3, char sep)
 {
     w << fmt::pad(v1, 2, '0') << sep << fmt::pad(v2, 2, '0') << sep << fmt::pad(v3, 2, '0');
     return w;
 }
 
-
-//Date and time representation (Thu Aug 23 15:35:46 2014)
-class c_formatter :public flag_formatter
+// Date and time representation (Thu Aug 23 15:35:46 2014)
+class c_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << days[tm_time.tm_wday] << ' ' << months[tm_time.tm_mon] << ' ' << tm_time.tm_mday << ' ';
         pad_n_join(msg.formatted, tm_time.tm_hour, tm_time.tm_min, tm_time.tm_sec, ':') << ' ' << tm_time.tm_year + 1900;
     }
 };
 
-
 // year - 2 digit
-class C_formatter :public flag_formatter
+class C_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(tm_time.tm_year % 100, 2, '0');
     }
 };
 
-
-
 // Short MM/DD/YY date, equivalent to %m/%d/%y 08/23/01
-class D_formatter :public flag_formatter
+class D_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         pad_n_join(msg.formatted, tm_time.tm_mon + 1, tm_time.tm_mday, tm_time.tm_year % 100, '/');
     }
 };
 
-
 // year - 4 digit
-class Y_formatter :public flag_formatter
+class Y_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << tm_time.tm_year + 1900;
     }
 };
 
 // month 1-12
-class m_formatter :public flag_formatter
+class m_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(tm_time.tm_mon + 1, 2, '0');
     }
 };
 
 // day of month 1-31
-class d_formatter :public flag_formatter
+class d_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(tm_time.tm_mday, 2, '0');
     }
 };
 
-// hours in 24 format  0-23
-class H_formatter :public flag_formatter
+// hours in 24 format 0-23
+class H_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(tm_time.tm_hour, 2, '0');
     }
 };
 
-// hours in 12 format  1-12
-class I_formatter :public flag_formatter
+// hours in 12 format 1-12
+class I_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(to12h(tm_time), 2, '0');
     }
 };
 
 // minutes 0-59
-class M_formatter :public flag_formatter
+class M_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(tm_time.tm_min, 2, '0');
     }
 };
 
 // seconds 0-59
-class S_formatter :public flag_formatter
+class S_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << fmt::pad(tm_time.tm_sec, 2, '0');
     }
 };
 
 // milliseconds
-class e_formatter :public flag_formatter
+class e_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         auto duration = msg.time.time_since_epoch();
         auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() % 1000;
@@ -239,9 +230,9 @@ class e_formatter :public flag_formatter
 };
 
 // microseconds
-class f_formatter :public flag_formatter
+class f_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         auto duration = msg.time.time_since_epoch();
         auto micros = std::chrono::duration_cast<std::chrono::microseconds>(duration).count() % 1000000;
@@ -250,9 +241,9 @@ class f_formatter :public flag_formatter
 };
 
 // nanoseconds
-class F_formatter :public flag_formatter
+class F_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         auto duration = msg.time.time_since_epoch();
         auto ns = std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count() % 1000000000;
@@ -260,55 +251,63 @@ class F_formatter :public flag_formatter
     }
 };
 
-// AM/PM
-class p_formatter :public flag_formatter
+class E_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &) override
+    {
+        auto duration = msg.time.time_since_epoch();
+        auto seconds = std::chrono::duration_cast<std::chrono::seconds>(duration).count();
+        msg.formatted << seconds;
+    }
+};
+
+// AM/PM
+class p_formatter SPDLOG_FINAL : public flag_formatter
+{
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         msg.formatted << ampm(tm_time);
     }
 };
 
-
 // 12 hour clock 02:55:02 pm
-class r_formatter :public flag_formatter
+class r_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         pad_n_join(msg.formatted, to12h(tm_time), tm_time.tm_min, tm_time.tm_sec, ':') << ' ' << ampm(tm_time);
     }
 };
 
 // 24-hour HH:MM time, equivalent to %H:%M
-class R_formatter :public flag_formatter
+class R_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         pad_n_join(msg.formatted, tm_time.tm_hour, tm_time.tm_min, ':');
     }
 };
 
 // ISO 8601 time format (HH:MM:SS), equivalent to %H:%M:%S
-class T_formatter :public flag_formatter
+class T_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
         pad_n_join(msg.formatted, tm_time.tm_hour, tm_time.tm_min, tm_time.tm_sec, ':');
     }
 };
 
-
 // ISO 8601 offset from UTC in timezone (+-HH:MM)
-class z_formatter :public flag_formatter
+class z_formatter SPDLOG_FINAL : public flag_formatter
 {
 public:
     const std::chrono::seconds cache_refresh = std::chrono::seconds(5);
 
-    z_formatter() :_last_update(std::chrono::seconds(0)) {}
-    z_formatter(const z_formatter&) = delete;
-    z_formatter& operator=(const z_formatter&) = delete;
+    z_formatter() = default;
+    z_formatter(const z_formatter &) = delete;
+    z_formatter &operator=(const z_formatter &) = delete;
 
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
 #ifdef _WIN32
         int total_minutes = get_cached_offset(msg, tm_time);
@@ -317,23 +316,31 @@ public:
         // it is very fast (already stored in tm.tm_gmtoff)
         int total_minutes = os::utc_minutes_offset(tm_time);
 #endif
+        bool is_negative = total_minutes < 0;
+        char sign;
+        if (is_negative)
+        {
+            total_minutes = -total_minutes;
+            sign = '-';
+        }
+        else
+        {
+            sign = '+';
+        }
 
         int h = total_minutes / 60;
         int m = total_minutes % 60;
-        if (h >= 0) //minus sign will be printed anyway if negative
-        {
-            msg.formatted << '+';
-        }
+        msg.formatted << sign;
         pad_n_join(msg.formatted, h, m, ':');
     }
+
 private:
-    log_clock::time_point _last_update;
-    int _offset_minutes;
+    log_clock::time_point _last_update{std::chrono::seconds(0)};
+    int _offset_minutes{0};
     std::mutex _mutex;
 
-    int get_cached_offset(const log_msg& msg, const std::tm& tm_time)
+    int get_cached_offset(const log_msg &msg, const std::tm &tm_time)
     {
-        using namespace std::chrono;
         std::lock_guard<std::mutex> l(_mutex);
         if (msg.time - _last_update >= cache_refresh)
         {
@@ -344,63 +351,97 @@ private:
     }
 };
 
-
-
-//Thread id
-class t_formatter :public flag_formatter
+// Thread id
+class t_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << msg.thread_id;
     }
 };
 
-
-class v_formatter :public flag_formatter
+// Current pid
+class pid_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
+    {
+        msg.formatted << details::os::pid();
+    }
+};
+
+// message counter formatter
+class i_formatter SPDLOG_FINAL : public flag_formatter
+{
+    void format(details::log_msg &msg, const std::tm &) override
+    {
+        msg.formatted << fmt::pad(msg.msg_id, 6, '0');
+    }
+};
+
+class v_formatter SPDLOG_FINAL : public flag_formatter
+{
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << fmt::StringRef(msg.raw.data(), msg.raw.size());
     }
 };
 
-class ch_formatter :public flag_formatter
+class ch_formatter SPDLOG_FINAL : public flag_formatter
 {
 public:
-    explicit ch_formatter(char ch) : _ch(ch)
-    {}
-    void format(details::log_msg& msg, const std::tm&) override
+    explicit ch_formatter(char ch)
+        : _ch(ch)
+    {
+    }
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << _ch;
     }
+
 private:
     char _ch;
 };
 
-
-//aggregate user chars to display as is
-class aggregate_formatter :public flag_formatter
+// aggregate user chars to display as is
+class aggregate_formatter SPDLOG_FINAL : public flag_formatter
 {
 public:
-    aggregate_formatter()
-    {}
+    aggregate_formatter() = default;
+
     void add_ch(char ch)
     {
         _str += ch;
     }
-    void format(details::log_msg& msg, const std::tm&) override
+    void format(details::log_msg &msg, const std::tm &) override
     {
         msg.formatted << _str;
     }
+
 private:
     std::string _str;
 };
 
+// mark the color range. expect it to be in the form of "%^colored text%$"
+class color_start_formatter SPDLOG_FINAL : public flag_formatter
+{
+    void format(details::log_msg &msg, const std::tm &) override
+    {
+        msg.color_range_start = msg.formatted.size();
+    }
+};
+class color_stop_formatter SPDLOG_FINAL : public flag_formatter
+{
+    void format(details::log_msg &msg, const std::tm &) override
+    {
+        msg.color_range_end = msg.formatted.size();
+    }
+};
+
 // Full info formatter
 // pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] %v
-class full_formatter :public flag_formatter
+class full_formatter SPDLOG_FINAL : public flag_formatter
 {
-    void format(details::log_msg& msg, const std::tm& tm_time) override
+    void format(details::log_msg &msg, const std::tm &tm_time) override
     {
 #ifndef SPDLOG_NO_DATETIME
         auto duration = msg.time.time_since_epoch();
@@ -419,7 +460,6 @@ class full_formatter :public flag_formatter
         level::to_str(msg.level),
         msg.raw.str());*/
 
-
         // Faster (albeit uglier) way to format the line (5.6 million lines/sec under 10 threads)
         msg.formatted << '[' << static_cast<unsigned int>(tm_time.tm_year + 1900) << '-'
                       << fmt::pad(static_cast<unsigned int>(tm_time.tm_mon + 1), 2, '0') << '-'
@@ -429,7 +469,7 @@ class full_formatter :public flag_formatter
                       << fmt::pad(static_cast<unsigned int>(tm_time.tm_sec), 2, '0') << '.'
                       << fmt::pad(static_cast<unsigned int>(millis), 3, '0') << "] ";
 
-//no datetime needed
+        // no datetime needed
 #else
         (void)tm_time;
 #endif
@@ -438,22 +478,28 @@ class full_formatter :public flag_formatter
         msg.formatted << '[' << *msg.logger_name << "] ";
 #endif
 
-        msg.formatted << '[' << level::to_str(msg.level) << "] ";
-        msg.formatted << fmt::StringRef(msg.raw.data(), msg.raw.size());
+        msg.formatted << '[';
+        // wrap the level name with color
+        msg.color_range_start = msg.formatted.size();
+        msg.formatted << level::to_str(msg.level);
+        msg.color_range_end = msg.formatted.size();
+        msg.formatted << "] " << fmt::StringRef(msg.raw.data(), msg.raw.size());
     }
 };
 
-}
-}
+} // namespace details
+} // namespace spdlog
 ///////////////////////////////////////////////////////////////////////////////
 // pattern_formatter inline impl
 ///////////////////////////////////////////////////////////////////////////////
-inline spdlog::pattern_formatter::pattern_formatter(const std::string& pattern)
+inline spdlog::pattern_formatter::pattern_formatter(const std::string &pattern, pattern_time_type pattern_time, std::string eol)
+    : _eol(std::move(eol))
+    , _pattern_time(pattern_time)
 {
     compile_pattern(pattern);
 }
 
-inline void spdlog::pattern_formatter::compile_pattern(const std::string& pattern)
+inline void spdlog::pattern_formatter::compile_pattern(const std::string &pattern)
 {
     auto end = pattern.end();
     std::unique_ptr<details::aggregate_formatter> user_chars;
@@ -461,26 +507,33 @@ inline void spdlog::pattern_formatter::compile_pattern(const std::string& patter
     {
         if (*it == '%')
         {
-            if (user_chars) //append user chars found so far
+            if (user_chars) // append user chars found so far
+            {
                 _formatters.push_back(std::move(user_chars));
-
+            }
+            // if(
             if (++it != end)
+            {
                 handle_flag(*it);
+            }
             else
+            {
                 break;
+            }
         }
         else // chars not following the % sign should be displayed as is
         {
             if (!user_chars)
+            {
                 user_chars = std::unique_ptr<details::aggregate_formatter>(new details::aggregate_formatter());
+            }
             user_chars->add_ch(*it);
         }
     }
-    if (user_chars) //append raw chars found so far
+    if (user_chars) // append raw chars found so far
     {
         _formatters.push_back(std::move(user_chars));
     }
-
 }
 inline void spdlog::pattern_formatter::handle_flag(char flag)
 {
@@ -488,145 +541,167 @@ inline void spdlog::pattern_formatter::handle_flag(char flag)
     {
     // logger name
     case 'n':
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::name_formatter()));
+        _formatters.emplace_back(new details::name_formatter());
         break;
 
     case 'l':
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::level_formatter()));
+        _formatters.emplace_back(new details::level_formatter());
         break;
 
     case 'L':
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::short_level_formatter()));
+        _formatters.emplace_back(new details::short_level_formatter());
         break;
 
-    case('t') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::t_formatter()));
+    case ('t'):
+        _formatters.emplace_back(new details::t_formatter());
         break;
 
-    case('v') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::v_formatter()));
+    case ('v'):
+        _formatters.emplace_back(new details::v_formatter());
         break;
 
-    case('a') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::a_formatter()));
+    case ('a'):
+        _formatters.emplace_back(new details::a_formatter());
         break;
 
-    case('A') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::A_formatter()));
+    case ('A'):
+        _formatters.emplace_back(new details::A_formatter());
         break;
 
-    case('b') :
-    case('h') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::b_formatter()));
+    case ('b'):
+    case ('h'):
+        _formatters.emplace_back(new details::b_formatter());
         break;
 
-    case('B') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::B_formatter()));
+    case ('B'):
+        _formatters.emplace_back(new details::B_formatter());
         break;
-    case('c') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::c_formatter()));
+    case ('c'):
+        _formatters.emplace_back(new details::c_formatter());
         break;
 
-    case('C') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::C_formatter()));
+    case ('C'):
+        _formatters.emplace_back(new details::C_formatter());
         break;
 
-    case('Y') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::Y_formatter()));
+    case ('Y'):
+        _formatters.emplace_back(new details::Y_formatter());
         break;
 
-    case('D') :
-    case('x') :
+    case ('D'):
+    case ('x'):
 
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::D_formatter()));
+        _formatters.emplace_back(new details::D_formatter());
         break;
 
-    case('m') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::m_formatter()));
+    case ('m'):
+        _formatters.emplace_back(new details::m_formatter());
         break;
 
-    case('d') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::d_formatter()));
+    case ('d'):
+        _formatters.emplace_back(new details::d_formatter());
         break;
 
-    case('H') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::H_formatter()));
+    case ('H'):
+        _formatters.emplace_back(new details::H_formatter());
         break;
 
-    case('I') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::I_formatter()));
+    case ('I'):
+        _formatters.emplace_back(new details::I_formatter());
         break;
 
-    case('M') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::M_formatter()));
+    case ('M'):
+        _formatters.emplace_back(new details::M_formatter());
         break;
 
-    case('S') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::S_formatter()));
+    case ('S'):
+        _formatters.emplace_back(new details::S_formatter());
         break;
 
-    case('e') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::e_formatter()));
+    case ('e'):
+        _formatters.emplace_back(new details::e_formatter());
         break;
 
-    case('f') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::f_formatter()));
+    case ('f'):
+        _formatters.emplace_back(new details::f_formatter());
         break;
-    case('F') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::F_formatter()));
+    case ('F'):
+        _formatters.emplace_back(new details::F_formatter());
         break;
 
-    case('p') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::p_formatter()));
+    case ('E'):
+        _formatters.emplace_back(new details::E_formatter());
         break;
 
-    case('r') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::r_formatter()));
+    case ('p'):
+        _formatters.emplace_back(new details::p_formatter());
         break;
 
-    case('R') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::R_formatter()));
+    case ('r'):
+        _formatters.emplace_back(new details::r_formatter());
         break;
 
-    case('T') :
-    case('X') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::T_formatter()));
+    case ('R'):
+        _formatters.emplace_back(new details::R_formatter());
         break;
 
-    case('z') :
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::z_formatter()));
+    case ('T'):
+    case ('X'):
+        _formatters.emplace_back(new details::T_formatter());
+        break;
+
+    case ('z'):
+        _formatters.emplace_back(new details::z_formatter());
         break;
 
     case ('+'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::full_formatter()));
+        _formatters.emplace_back(new details::full_formatter());
         break;
 
-    default: //Unkown flag appears as is
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::ch_formatter('%')));
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::ch_formatter(flag)));
+    case ('P'):
+        _formatters.emplace_back(new details::pid_formatter());
+        break;
+
+    case ('i'):
+        _formatters.emplace_back(new details::i_formatter());
+        break;
+
+    case ('^'):
+        _formatters.emplace_back(new details::color_start_formatter());
+        break;
+
+    case ('$'):
+        _formatters.emplace_back(new details::color_stop_formatter());
+        break;
+
+    default: // Unknown flag appears as is
+        _formatters.emplace_back(new details::ch_formatter('%'));
+        _formatters.emplace_back(new details::ch_formatter(flag));
         break;
     }
 }
 
-
-inline void spdlog::pattern_formatter::format(details::log_msg& msg)
+inline std::tm spdlog::pattern_formatter::get_time(details::log_msg &msg)
 {
-    try
+    if (_pattern_time == pattern_time_type::local)
     {
-#ifndef SPDLOG_NO_DATETIME
-        auto tm_time = details::os::localtime(log_clock::to_time_t(msg.time));
-#else
-        std::tm tm_time;
-#endif
-        for (auto &f : _formatters)
-        {
-            f->format(msg, tm_time);
-        }
-        //write eol
-        msg.formatted.write(details::os::eol, details::os::eol_size);
-    }
-    catch(const fmt::FormatError& e)
-    {
-        throw spdlog_ex(fmt::format("formatting error while processing format string: {}", e.what()));
+        return details::os::localtime(log_clock::to_time_t(msg.time));
     }
+    return details::os::gmtime(log_clock::to_time_t(msg.time));
+}
+
+inline void spdlog::pattern_formatter::format(details::log_msg &msg)
+{
+
+#ifndef SPDLOG_NO_DATETIME
+    auto tm_time = get_time(msg);
+#else
+    std::tm tm_time;
+#endif
+    for (auto &f : _formatters)
+    {
+        f->format(msg, tm_time);
+    }
+    // write eol
+    msg.formatted << _eol;
 }

include/spdlog/details/registry.h

@@ -10,10 +10,10 @@
 // If user requests a non existing logger, nullptr will be returned
 // This class is thread safe
 
-#include <spdlog/details/null_mutex.h>
-#include <spdlog/logger.h>
-#include <spdlog/async_logger.h>
-#include <spdlog/common.h>
+#include "../async_logger.h"
+#include "../common.h"
+#include "../details/null_mutex.h"
+#include "../logger.h"
 
 #include <chrono>
 #include <functional>
@@ -22,13 +22,14 @@
 #include <string>
 #include <unordered_map>
 
-namespace spdlog
-{
-namespace details
-{
-template <class Mutex> class registry_t
+namespace spdlog {
+namespace details {
+template<class Mutex>
+class registry_t
 {
 public:
+    registry_t<Mutex>(const registry_t<Mutex> &) = delete;
+    registry_t<Mutex> &operator=(const registry_t<Mutex> &) = delete;
 
     void register_logger(std::shared_ptr<logger> logger)
     {
@@ -38,8 +39,7 @@ public:
         _loggers[logger_name] = logger;
     }
 
-
-    std::shared_ptr<logger> get(const std::string& logger_name)
+    std::shared_ptr<logger> get(const std::string &logger_name)
     {
         std::lock_guard<Mutex> lock(_mutex);
         auto found = _loggers.find(logger_name);
@@ -47,26 +47,78 @@ public:
     }
 
     template<class It>
-    std::shared_ptr<logger> create(const std::string& logger_name, const It& sinks_begin, const It& sinks_end)
+    std::shared_ptr<logger> create(const std::string &logger_name, const It &sinks_begin, const It &sinks_end)
     {
         std::lock_guard<Mutex> lock(_mutex);
         throw_if_exists(logger_name);
         std::shared_ptr<logger> new_logger;
         if (_async_mode)
-            new_logger = std::make_shared<async_logger>(logger_name, sinks_begin, sinks_end, _async_q_size, _overflow_policy, _worker_warmup_cb, _flush_interval_ms, _worker_teardown_cb);
+        {
+            new_logger = std::make_shared<async_logger>(logger_name, sinks_begin, sinks_end, _async_q_size, _overflow_policy,
+                _worker_warmup_cb, _flush_interval_ms, _worker_teardown_cb);
+        }
         else
+        {
             new_logger = std::make_shared<logger>(logger_name, sinks_begin, sinks_end);
+        }
 
         if (_formatter)
+        {
             new_logger->set_formatter(_formatter);
+        }
+
+        if (_err_handler)
+        {
+            new_logger->set_error_handler(_err_handler);
+        }
 
         new_logger->set_level(_level);
-        //Add to registry
+        new_logger->flush_on(_flush_level);
+
+        // Add to registry
         _loggers[logger_name] = new_logger;
         return new_logger;
     }
 
-    void drop(const std::string& logger_name)
+    template<class It>
+    std::shared_ptr<async_logger> create_async(const std::string &logger_name, size_t queue_size,
+        const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+        const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb, const It &sinks_begin,
+        const It &sinks_end)
+    {
+        std::lock_guard<Mutex> lock(_mutex);
+        throw_if_exists(logger_name);
+        auto new_logger = std::make_shared<async_logger>(
+            logger_name, sinks_begin, sinks_end, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb);
+
+        if (_formatter)
+        {
+            new_logger->set_formatter(_formatter);
+        }
+
+        if (_err_handler)
+        {
+            new_logger->set_error_handler(_err_handler);
+        }
+
+        new_logger->set_level(_level);
+        new_logger->flush_on(_flush_level);
+
+        // Add to registry
+        _loggers[logger_name] = new_logger;
+        return new_logger;
+    }
+
+    void apply_all(std::function<void(std::shared_ptr<logger>)> fun)
+    {
+        std::lock_guard<Mutex> lock(_mutex);
+        for (auto &l : _loggers)
+        {
+            fun(l.second);
+        }
+    }
+
+    void drop(const std::string &logger_name)
     {
         std::lock_guard<Mutex> lock(_mutex);
         _loggers.erase(logger_name);
@@ -77,42 +129,83 @@ public:
         std::lock_guard<Mutex> lock(_mutex);
         _loggers.clear();
     }
-    std::shared_ptr<logger> create(const std::string& logger_name, sinks_init_list sinks)
+
+    std::shared_ptr<logger> create(const std::string &logger_name, sinks_init_list sinks)
     {
         return create(logger_name, sinks.begin(), sinks.end());
     }
 
-    std::shared_ptr<logger> create(const std::string& logger_name, sink_ptr sink)
+    std::shared_ptr<logger> create(const std::string &logger_name, sink_ptr sink)
     {
-        return create(logger_name, { sink });
+        return create(logger_name, {sink});
     }
 
+    std::shared_ptr<async_logger> create_async(const std::string &logger_name, size_t queue_size,
+        const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+        const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb, sinks_init_list sinks)
+    {
+        return create_async(
+            logger_name, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb, sinks.begin(), sinks.end());
+    }
+
+    std::shared_ptr<async_logger> create_async(const std::string &logger_name, size_t queue_size,
+        const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+        const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb, sink_ptr sink)
+    {
+        return create_async(logger_name, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb, {sink});
+    }
 
     void formatter(formatter_ptr f)
     {
         std::lock_guard<Mutex> lock(_mutex);
         _formatter = f;
-        for (auto& l : _loggers)
+        for (auto &l : _loggers)
+        {
             l.second->set_formatter(_formatter);
+        }
     }
 
-    void set_pattern(const std::string& pattern)
+    void set_pattern(const std::string &pattern)
     {
         std::lock_guard<Mutex> lock(_mutex);
         _formatter = std::make_shared<pattern_formatter>(pattern);
-        for (auto& l : _loggers)
+        for (auto &l : _loggers)
+        {
             l.second->set_formatter(_formatter);
+        }
     }
 
     void set_level(level::level_enum log_level)
     {
         std::lock_guard<Mutex> lock(_mutex);
-        for (auto& l : _loggers)
+        for (auto &l : _loggers)
+        {
             l.second->set_level(log_level);
+        }
         _level = log_level;
     }
 
-    void set_async_mode(size_t q_size, const async_overflow_policy overflow_policy, const std::function<void()>& worker_warmup_cb, const std::chrono::milliseconds& flush_interval_ms, const std::function<void()>& worker_teardown_cb)
+    void flush_on(level::level_enum log_level)
+    {
+        std::lock_guard<Mutex> lock(_mutex);
+        for (auto &l : _loggers)
+        {
+            l.second->flush_on(log_level);
+        }
+        _flush_level = log_level;
+    }
+
+    void set_error_handler(log_err_handler handler)
+    {
+        for (auto &l : _loggers)
+        {
+            l.second->set_error_handler(handler);
+        }
+        _err_handler = handler;
+    }
+
+    void set_async_mode(size_t q_size, const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+        const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
     {
         std::lock_guard<Mutex> lock(_mutex);
         _async_mode = true;
@@ -129,37 +222,42 @@ public:
         _async_mode = false;
     }
 
-    static registry_t<Mutex>& instance()
+    static registry_t<Mutex> &instance()
     {
         static registry_t<Mutex> s_instance;
         return s_instance;
     }
 
 private:
-    registry_t<Mutex>() {}
-    registry_t<Mutex>(const registry_t<Mutex>&) = delete;
-    registry_t<Mutex>& operator=(const registry_t<Mutex>&) = delete;
+    registry_t<Mutex>() = default;
 
     void throw_if_exists(const std::string &logger_name)
     {
         if (_loggers.find(logger_name) != _loggers.end())
+        {
             throw spdlog_ex("logger with name '" + logger_name + "' already exists");
+        }
     }
+
     Mutex _mutex;
-    std::unordered_map <std::string, std::shared_ptr<logger>> _loggers;
+    std::unordered_map<std::string, std::shared_ptr<logger>> _loggers;
     formatter_ptr _formatter;
     level::level_enum _level = level::info;
+    level::level_enum _flush_level = level::off;
+    log_err_handler _err_handler;
     bool _async_mode = false;
     size_t _async_q_size = 0;
     async_overflow_policy _overflow_policy = async_overflow_policy::block_retry;
-    std::function<void()> _worker_warmup_cb = nullptr;
-    std::chrono::milliseconds _flush_interval_ms;
-    std::function<void()> _worker_teardown_cb = nullptr;
+    std::function<void()> _worker_warmup_cb;
+    std::chrono::milliseconds _flush_interval_ms{std::chrono::milliseconds::zero()};
+    std::function<void()> _worker_teardown_cb;
 };
+
 #ifdef SPDLOG_NO_REGISTRY_MUTEX
-typedef registry_t<spdlog::details::null_mutex> registry;
+using registry = registry_t<spdlog::details::null_mutex>;
 #else
-typedef registry_t<std::mutex> registry;
+using registry = registry_t<std::mutex>;
 #endif
-}
-}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/spdlog_impl.h

@@ -8,12 +8,23 @@
 //
 // Global registry functions
 //
-#include <spdlog/spdlog.h>
-#include <spdlog/details/registry.h>
-#include <spdlog/sinks/file_sinks.h>
-#include <spdlog/sinks/stdout_sinks.h>
-#include <spdlog/sinks/syslog_sink.h>
-#include <spdlog/sinks/ansicolor_sink.h>
+#include "../details/registry.h"
+#include "../sinks/file_sinks.h"
+#include "../sinks/stdout_sinks.h"
+#include "../spdlog.h"
+#ifdef SPDLOG_ENABLE_SYSLOG
+#include "../sinks/syslog_sink.h"
+#endif
+
+#if defined _WIN32 && !defined(__cplusplus_winrt)
+#include "../sinks/wincolor_sink.h"
+#else
+#include "../sinks/ansicolor_sink.h"
+#endif
+
+#ifdef __ANDROID__
+#include "../sinks/android_sink.h"
+#endif
 
 #include <chrono>
 #include <functional>
@@ -22,10 +33,10 @@
 
 inline void spdlog::register_logger(std::shared_ptr<logger> logger)
 {
-    return details::registry::instance().register_logger(logger);
+    return details::registry::instance().register_logger(std::move(logger));
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::get(const std::string& name)
+inline std::shared_ptr<spdlog::logger> spdlog::get(const std::string &name)
 {
     return details::registry::instance().get(name);
 }
@@ -36,108 +47,195 @@ inline void spdlog::drop(const std::string &name)
 }
 
 // Create multi/single threaded simple file logger
-inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_mt(const std::string& logger_name, const filename_t& filename, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_mt(const std::string &logger_name, const filename_t &filename, bool truncate)
 {
-    return create<spdlog::sinks::simple_file_sink_mt>(logger_name, filename, force_flush);
+    return create<spdlog::sinks::simple_file_sink_mt>(logger_name, filename, truncate);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_st(const std::string& logger_name, const filename_t& filename, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::basic_logger_st(const std::string &logger_name, const filename_t &filename, bool truncate)
 {
-    return create<spdlog::sinks::simple_file_sink_st>(logger_name, filename, force_flush);
+    return create<spdlog::sinks::simple_file_sink_st>(logger_name, filename, truncate);
 }
 
 // Create multi/single threaded rotating file logger
-inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_mt(const std::string& logger_name, const filename_t& filename, size_t max_file_size, size_t max_files, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_mt(
+    const std::string &logger_name, const filename_t &filename, size_t max_file_size, size_t max_files)
 {
-    return create<spdlog::sinks::rotating_file_sink_mt>(logger_name, filename, SPDLOG_FILENAME_T("txt"), max_file_size, max_files, force_flush);
+    return create<spdlog::sinks::rotating_file_sink_mt>(logger_name, filename, max_file_size, max_files);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_st(const std::string& logger_name, const filename_t& filename, size_t max_file_size, size_t max_files, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::rotating_logger_st(
+    const std::string &logger_name, const filename_t &filename, size_t max_file_size, size_t max_files)
 {
-    return create<spdlog::sinks::rotating_file_sink_st>(logger_name, filename, SPDLOG_FILENAME_T("txt"), max_file_size, max_files, force_flush);
+    return create<spdlog::sinks::rotating_file_sink_st>(logger_name, filename, max_file_size, max_files);
 }
 
 // Create file logger which creates new file at midnight):
-inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_mt(const std::string& logger_name, const filename_t& filename, int hour, int minute, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_mt(
+    const std::string &logger_name, const filename_t &filename, int hour, int minute)
 {
-    return create<spdlog::sinks::daily_file_sink_mt>(logger_name, filename, SPDLOG_FILENAME_T("txt"), hour, minute, force_flush);
+    return create<spdlog::sinks::daily_file_sink_mt>(logger_name, filename, hour, minute);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_st(const std::string& logger_name, const filename_t& filename, int hour, int minute, bool force_flush)
+inline std::shared_ptr<spdlog::logger> spdlog::daily_logger_st(
+    const std::string &logger_name, const filename_t &filename, int hour, int minute)
 {
-    return create<spdlog::sinks::daily_file_sink_st>(logger_name, filename, SPDLOG_FILENAME_T("txt"), hour, minute, force_flush);
+    return create<spdlog::sinks::daily_file_sink_st>(logger_name, filename, hour, minute);
 }
 
-// Create stdout/stderr loggers (with optinal color support)
-inline std::shared_ptr<spdlog::logger> create_console_logger(const std::string& logger_name, spdlog::sink_ptr sink, bool color)
+//
+// stdout/stderr loggers
+//
+inline std::shared_ptr<spdlog::logger> spdlog::stdout_logger_mt(const std::string &logger_name)
 {
-    if (color) //use color wrapper sink
-        sink = std::make_shared<spdlog::sinks::ansicolor_sink>(sink);
+    return spdlog::details::registry::instance().create(logger_name, spdlog::sinks::stdout_sink_mt::instance());
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::stdout_logger_st(const std::string &logger_name)
+{
+    return spdlog::details::registry::instance().create(logger_name, spdlog::sinks::stdout_sink_st::instance());
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::stderr_logger_mt(const std::string &logger_name)
+{
+    return spdlog::details::registry::instance().create(logger_name, spdlog::sinks::stderr_sink_mt::instance());
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::stderr_logger_st(const std::string &logger_name)
+{
+    return spdlog::details::registry::instance().create(logger_name, spdlog::sinks::stderr_sink_st::instance());
+}
+
+//
+// stdout/stderr color loggers
+//
+#if defined _WIN32 && !defined(__cplusplus_winrt)
+
+inline std::shared_ptr<spdlog::logger> spdlog::stdout_color_mt(const std::string &logger_name)
+{
+    auto sink = std::make_shared<spdlog::sinks::wincolor_stdout_sink_mt>();
     return spdlog::details::registry::instance().create(logger_name, sink);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::stdout_logger_mt(const std::string& logger_name, bool color)
+inline std::shared_ptr<spdlog::logger> spdlog::stdout_color_st(const std::string &logger_name)
 {
-    return create_console_logger(logger_name, sinks::stdout_sink_mt::instance(), color);
+    auto sink = std::make_shared<spdlog::sinks::wincolor_stdout_sink_st>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::stdout_logger_st(const std::string& logger_name, bool color)
+inline std::shared_ptr<spdlog::logger> spdlog::stderr_color_mt(const std::string &logger_name)
 {
-    return create_console_logger(logger_name, sinks::stdout_sink_st::instance(), color);
+    auto sink = std::make_shared<spdlog::sinks::wincolor_stderr_sink_mt>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::stderr_logger_mt(const std::string& logger_name, bool color)
+inline std::shared_ptr<spdlog::logger> spdlog::stderr_color_st(const std::string &logger_name)
 {
-    return create_console_logger(logger_name, sinks::stderr_sink_mt::instance(), color);
+    auto sink = std::make_shared<spdlog::sinks::wincolor_stderr_sink_st>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
 }
 
-inline std::shared_ptr<spdlog::logger> spdlog::stderr_logger_st(const std::string& logger_name, bool color)
+#else // ansi terminal colors
+
+inline std::shared_ptr<spdlog::logger> spdlog::stdout_color_mt(const std::string &logger_name)
 {
-    return create_console_logger(logger_name, sinks::stderr_sink_st::instance(), color);
+    auto sink = std::make_shared<spdlog::sinks::ansicolor_stdout_sink_mt>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
 }
 
-#if defined(__linux__) || defined(__APPLE__)
+inline std::shared_ptr<spdlog::logger> spdlog::stdout_color_st(const std::string &logger_name)
+{
+    auto sink = std::make_shared<spdlog::sinks::ansicolor_stdout_sink_st>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::stderr_color_mt(const std::string &logger_name)
+{
+    auto sink = std::make_shared<spdlog::sinks::ansicolor_stderr_sink_mt>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::stderr_color_st(const std::string &logger_name)
+{
+    auto sink = std::make_shared<spdlog::sinks::ansicolor_stderr_sink_st>();
+    return spdlog::details::registry::instance().create(logger_name, sink);
+}
+#endif
+
+#ifdef SPDLOG_ENABLE_SYSLOG
 // Create syslog logger
-inline std::shared_ptr<spdlog::logger> spdlog::syslog_logger(const std::string& logger_name, const std::string& syslog_ident, int syslog_option)
+inline std::shared_ptr<spdlog::logger> spdlog::syslog_logger(
+    const std::string &logger_name, const std::string &syslog_ident, int syslog_option, int syslog_facility)
 {
-    return create<spdlog::sinks::syslog_sink>(logger_name, syslog_ident, syslog_option);
+    return create<spdlog::sinks::syslog_sink>(logger_name, syslog_ident, syslog_option, syslog_facility);
+}
+#endif
+
+#ifdef __ANDROID__
+inline std::shared_ptr<spdlog::logger> spdlog::android_logger(const std::string &logger_name, const std::string &tag)
+{
+    return create<spdlog::sinks::android_sink>(logger_name, tag);
 }
 #endif
 
 // Create and register a logger a single sink
-inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string& logger_name, const spdlog::sink_ptr& sink)
+inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string &logger_name, const spdlog::sink_ptr &sink)
 {
     return details::registry::instance().create(logger_name, sink);
 }
 
-//Create logger with multiple sinks
-
-inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string& logger_name, spdlog::sinks_init_list sinks)
+// Create logger with multiple sinks
+inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string &logger_name, spdlog::sinks_init_list sinks)
 {
     return details::registry::instance().create(logger_name, sinks);
 }
 
-
-template <typename Sink, typename... Args>
-inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string& logger_name, Args... args)
+template<typename Sink, typename... Args>
+inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string &logger_name, Args... args)
 {
     sink_ptr sink = std::make_shared<Sink>(args...);
-    return details::registry::instance().create(logger_name, { sink });
+    return details::registry::instance().create(logger_name, {sink});
 }
 
-
 template<class It>
-inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string& logger_name, const It& sinks_begin, const It& sinks_end)
+inline std::shared_ptr<spdlog::logger> spdlog::create(const std::string &logger_name, const It &sinks_begin, const It &sinks_end)
 {
     return details::registry::instance().create(logger_name, sinks_begin, sinks_end);
 }
 
-inline void spdlog::set_formatter(spdlog::formatter_ptr f)
+// Create and register an async logger with a single sink
+inline std::shared_ptr<spdlog::logger> spdlog::create_async(const std::string &logger_name, const sink_ptr &sink, size_t queue_size,
+    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
 {
-    details::registry::instance().formatter(f);
+    return details::registry::instance().create_async(
+        logger_name, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb, sink);
 }
 
-inline void spdlog::set_pattern(const std::string& format_string)
+// Create and register an async logger with multiple sinks
+inline std::shared_ptr<spdlog::logger> spdlog::create_async(const std::string &logger_name, sinks_init_list sinks, size_t queue_size,
+    const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
+{
+    return details::registry::instance().create_async(
+        logger_name, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb, sinks);
+}
+
+template<class It>
+inline std::shared_ptr<spdlog::logger> spdlog::create_async(const std::string &logger_name, const It &sinks_begin, const It &sinks_end,
+    size_t queue_size, const async_overflow_policy overflow_policy, const std::function<void()> &worker_warmup_cb,
+    const std::chrono::milliseconds &flush_interval_ms, const std::function<void()> &worker_teardown_cb)
+{
+    return details::registry::instance().create_async(
+        logger_name, queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb, sinks_begin, sinks_end);
+}
+
+inline void spdlog::set_formatter(spdlog::formatter_ptr f)
+{
+    details::registry::instance().formatter(std::move(f));
+}
+
+inline void spdlog::set_pattern(const std::string &format_string)
 {
     return details::registry::instance().set_pattern(format_string);
 }
@@ -147,8 +245,19 @@ inline void spdlog::set_level(level::level_enum log_level)
     return details::registry::instance().set_level(log_level);
 }
 
+inline void spdlog::flush_on(level::level_enum log_level)
+{
+    return details::registry::instance().flush_on(log_level);
+}
 
-inline void spdlog::set_async_mode(size_t queue_size, const async_overflow_policy overflow_policy, const std::function<void()>& worker_warmup_cb, const std::chrono::milliseconds& flush_interval_ms, const std::function<void()>& worker_teardown_cb)
+inline void spdlog::set_error_handler(log_err_handler handler)
+{
+    return details::registry::instance().set_error_handler(std::move(handler));
+}
+
+inline void spdlog::set_async_mode(size_t queue_size, const async_overflow_policy overflow_policy,
+    const std::function<void()> &worker_warmup_cb, const std::chrono::milliseconds &flush_interval_ms,
+    const std::function<void()> &worker_teardown_cb)
 {
     details::registry::instance().set_async_mode(queue_size, overflow_policy, worker_warmup_cb, flush_interval_ms, worker_teardown_cb);
 }
@@ -158,6 +267,11 @@ inline void spdlog::set_sync_mode()
     details::registry::instance().set_sync_mode();
 }
 
+inline void spdlog::apply_all(std::function<void(std::shared_ptr<logger>)> fun)
+{
+    details::registry::instance().apply_all(std::move(fun));
+}
+
 inline void spdlog::drop_all()
 {
     details::registry::instance().drop_all();

include/spdlog/fmt/bundled/LICENSE.rst

@@ -0,0 +1,23 @@
+Copyright (c) 2012 - 2016, Victor Zverovich
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

include/spdlog/fmt/bundled/format.cc

@@ -25,9 +25,7 @@
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
- // Commented out by spdlog to use header only
- // #include "fmt/format.h"
- // #include "fmt/printf.h"
+#include "format.h"
 
 #include <string.h>
 
@@ -43,6 +41,9 @@
 #endif
 
 #if FMT_USE_WINDOWS_H
+# if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN)
+#  define WIN32_LEAN_AND_MEAN
+# endif
 # if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
 #  include <windows.h>
 # else
@@ -52,8 +53,6 @@
 # endif
 #endif
 
-using fmt::internal::Arg;
-
 #if FMT_EXCEPTIONS
 # define FMT_TRY try
 # define FMT_CATCH(x) catch (x)
@@ -73,18 +72,20 @@ using fmt::internal::Arg;
 
 // Dummy implementations of strerror_r and strerror_s called if corresponding
 // system functions are not available.
+FMT_MAYBE_UNUSED
 static inline fmt::internal::Null<> strerror_r(int, char *, ...) {
   return fmt::internal::Null<>();
 }
+FMT_MAYBE_UNUSED
 static inline fmt::internal::Null<> strerror_s(char *, std::size_t, ...) {
   return fmt::internal::Null<>();
 }
 
 namespace fmt {
 
-FMT_FUNC internal::RuntimeError::~RuntimeError() throw() {}
-FMT_FUNC FormatError::~FormatError() throw() {}
-FMT_FUNC SystemError::~SystemError() throw() {}
+FMT_FUNC internal::RuntimeError::~RuntimeError() FMT_DTOR_NOEXCEPT {}
+FMT_FUNC FormatError::~FormatError() FMT_DTOR_NOEXCEPT {}
+FMT_FUNC SystemError::~SystemError() FMT_DTOR_NOEXCEPT {}
 
 namespace {
 
@@ -122,7 +123,7 @@ typedef void (*FormatFunc)(Writer &, int, StringRef);
 // Buffer should be at least of size 1.
 int safe_strerror(
     int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT {
-  FMT_ASSERT(buffer != 0 && buffer_size != 0, "invalid buffer");
+  FMT_ASSERT(buffer != FMT_NULL && buffer_size != 0, "invalid buffer");
 
   class StrError {
    private:
@@ -160,6 +161,11 @@ int safe_strerror(
             ERANGE : result;
     }
 
+#ifdef __c2__
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
     // Fallback to strerror if strerror_r and strerror_s are not available.
     int fallback(internal::Null<>) {
       errno = 0;
@@ -167,12 +173,15 @@ int safe_strerror(
       return errno;
     }
 
+#ifdef __c2__
+# pragma clang diagnostic pop
+#endif
+
    public:
     StrError(int err_code, char *&buf, std::size_t buf_size)
       : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
 
     int run() {
-      strerror_r(0, 0, "");  // Suppress a warning about unused strerror_r.
       return handle(strerror_r(error_code_, buffer_, buffer_size_));
     }
   };
@@ -213,16 +222,6 @@ void report_error(FormatFunc func, int error_code,
 }
 }  // namespace
 
-namespace internal {
-
-// This method is used to preserve binary compatibility with fmt 3.0.
-// It can be removed in 4.0.
-FMT_FUNC void format_system_error(
-  Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
-  fmt::format_system_error(out, error_code, message);
-}
-}  // namespace internal
-
 FMT_FUNC void SystemError::init(
     int err_code, CStringRef format_str, ArgList args) {
   error_code_ = err_code;
@@ -313,7 +312,7 @@ FMT_FUNC internal::UTF8ToUTF16::UTF8ToUTF16(StringRef s) {
     FMT_THROW(WindowsError(ERROR_INVALID_PARAMETER, ERROR_MSG));
   int s_size = static_cast<int>(s.size());
   int length = MultiByteToWideChar(
-      CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, 0, 0);
+      CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, FMT_NULL, 0);
   if (length == 0)
     FMT_THROW(WindowsError(GetLastError(), ERROR_MSG));
   buffer_.resize(length + 1);
@@ -335,12 +334,13 @@ FMT_FUNC int internal::UTF16ToUTF8::convert(WStringRef s) {
   if (s.size() > INT_MAX)
     return ERROR_INVALID_PARAMETER;
   int s_size = static_cast<int>(s.size());
-  int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, 0, 0, 0, 0);
+  int length = WideCharToMultiByte(
+    CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL);
   if (length == 0)
     return GetLastError();
   buffer_.resize(length + 1);
   length = WideCharToMultiByte(
-    CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, 0, 0);
+    CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, FMT_NULL, FMT_NULL);
   if (length == 0)
     return GetLastError();
   buffer_[length] = 0;
@@ -363,9 +363,10 @@ FMT_FUNC void internal::format_windows_error(
     buffer.resize(INLINE_BUFFER_SIZE);
     for (;;) {
       wchar_t *system_message = &buffer[0];
-      int result = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
-                                  0, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                                  system_message, static_cast<uint32_t>(buffer.size()), 0);
+      int result = FormatMessageW(
+        FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+        FMT_NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        system_message, static_cast<uint32_t>(buffer.size()), FMT_NULL);
       if (result != 0) {
         UTF16ToUTF8 utf8_message;
         if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
@@ -404,64 +405,19 @@ FMT_FUNC void format_system_error(
   fmt::format_error_code(out, error_code, message);  // 'fmt::' is for bcc32.
 }
 
-template <typename Char>
-void internal::ArgMap<Char>::init(const ArgList &args) {
-  if (!map_.empty())
-    return;
-  typedef internal::NamedArg<Char> NamedArg;
-  const NamedArg *named_arg = 0;
-  bool use_values =
-      args.type(ArgList::MAX_PACKED_ARGS - 1) == internal::Arg::NONE;
-  if (use_values) {
-    for (unsigned i = 0;/*nothing*/; ++i) {
-      internal::Arg::Type arg_type = args.type(i);
-      switch (arg_type) {
-      case internal::Arg::NONE:
-        return;
-      case internal::Arg::NAMED_ARG:
-        named_arg = static_cast<const NamedArg*>(args.values_[i].pointer);
-        map_.push_back(Pair(named_arg->name, *named_arg));
-        break;
-      default:
-        /*nothing*/;
-      }
-    }
-    return;
-  }
-  for (unsigned i = 0; i != ArgList::MAX_PACKED_ARGS; ++i) {
-    internal::Arg::Type arg_type = args.type(i);
-    if (arg_type == internal::Arg::NAMED_ARG) {
-      named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
-      map_.push_back(Pair(named_arg->name, *named_arg));
-    }
-  }
-  for (unsigned i = ArgList::MAX_PACKED_ARGS;/*nothing*/; ++i) {
-    switch (args.args_[i].type) {
-    case internal::Arg::NONE:
-      return;
-    case internal::Arg::NAMED_ARG:
-      named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
-      map_.push_back(Pair(named_arg->name, *named_arg));
-      break;
-    default:
-      /*nothing*/;
-    }
-  }
-}
-
 template <typename Char>
 void internal::FixedBuffer<Char>::grow(std::size_t) {
   FMT_THROW(std::runtime_error("buffer overflow"));
 }
 
-FMT_FUNC Arg internal::FormatterBase::do_get_arg(
+FMT_FUNC internal::Arg internal::FormatterBase::do_get_arg(
     unsigned arg_index, const char *&error) {
-  Arg arg = args_[arg_index];
+  internal::Arg arg = args_[arg_index];
   switch (arg.type) {
-  case Arg::NONE:
+  case internal::Arg::NONE:
     error = "argument index out of range";
     break;
-  case Arg::NAMED_ARG:
+  case internal::Arg::NAMED_ARG:
     arg = *static_cast<const internal::Arg*>(arg.pointer);
     break;
   default:
@@ -502,16 +458,6 @@ FMT_FUNC void print_colored(Color c, CStringRef format, ArgList args) {
   std::fputs(RESET_COLOR, stdout);
 }
 
-template <typename Char>
-void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args);
-
-FMT_FUNC int fprintf(std::FILE *f, CStringRef format, ArgList args) {
-  MemoryWriter w;
-  printf(w, format, args);
-  std::size_t size = w.size();
-  return std::fwrite(w.data(), 1, size, f) < size ? -1 : static_cast<int>(size);
-}
-
 #ifndef FMT_HEADER_ONLY
 
 template struct internal::BasicData<void>;
@@ -520,15 +466,11 @@ template struct internal::BasicData<void>;
 
 template void internal::FixedBuffer<char>::grow(std::size_t);
 
-template void internal::ArgMap<char>::init(const ArgList &args);
-
-template void PrintfFormatter<char>::format(CStringRef format);
-
-template int internal::CharTraits<char>::format_float(
+template FMT_API int internal::CharTraits<char>::format_float(
     char *buffer, std::size_t size, const char *format,
     unsigned width, int precision, double value);
 
-template int internal::CharTraits<char>::format_float(
+template FMT_API int internal::CharTraits<char>::format_float(
     char *buffer, std::size_t size, const char *format,
     unsigned width, int precision, long double value);
 
@@ -536,15 +478,11 @@ template int internal::CharTraits<char>::format_float(
 
 template void internal::FixedBuffer<wchar_t>::grow(std::size_t);
 
-template void internal::ArgMap<wchar_t>::init(const ArgList &args);
-
-template void PrintfFormatter<wchar_t>::format(WCStringRef format);
-
-template int internal::CharTraits<wchar_t>::format_float(
+template FMT_API int internal::CharTraits<wchar_t>::format_float(
     wchar_t *buffer, std::size_t size, const wchar_t *format,
     unsigned width, int precision, double value);
 
-template int internal::CharTraits<wchar_t>::format_float(
+template FMT_API int internal::CharTraits<wchar_t>::format_float(
     wchar_t *buffer, std::size_t size, const wchar_t *format,
     unsigned width, int precision, long double value);
 

include/spdlog/fmt/bundled/ostream.cc

@@ -7,15 +7,12 @@
  For the license information refer to format.h.
  */
 
- // Commented out by spdlog to use header only
- // #include "fmt/ostream.h"
- // #include "fmt/printf.h"
+#include "ostream.h"
 
 namespace fmt {
 
-namespace {
-// Write the content of w to os.
-void write(std::ostream &os, Writer &w) {
+namespace internal {
+FMT_FUNC void write(std::ostream &os, Writer &w) {
   const char *data = w.data();
   typedef internal::MakeUnsigned<std::streamsize>::Type UnsignedStreamSize;
   UnsignedStreamSize size = w.size();
@@ -33,13 +30,6 @@ void write(std::ostream &os, Writer &w) {
 FMT_FUNC void print(std::ostream &os, CStringRef format_str, ArgList args) {
   MemoryWriter w;
   w.write(format_str, args);
-  write(os, w);
-}
-
-FMT_FUNC int fprintf(std::ostream &os, CStringRef format, ArgList args) {
-  MemoryWriter w;
-  printf(w, format, args);
-  write(os, w);
-  return static_cast<int>(w.size());
+  internal::write(os, w);
 }
 }  // namespace fmt

include/spdlog/fmt/bundled/ostream.h

@@ -10,17 +10,14 @@
 #ifndef FMT_OSTREAM_H_
 #define FMT_OSTREAM_H_
 
-// Commented out by spdlog to use header only
-// #include "fmt/format.h"
+#include "format.h"
 #include <ostream>
 
-namespace fmt
-{
+namespace fmt {
 
-namespace internal
-{
+namespace internal {
 
-template <class Char>
+template<class Char>
 class FormatBuf : public std::basic_streambuf<Char>
 {
 private:
@@ -28,32 +25,32 @@ private:
     typedef typename std::basic_streambuf<Char>::traits_type traits_type;
 
     Buffer<Char> &buffer_;
-    Char *start_;
 
 public:
-    FormatBuf(Buffer<Char> &buffer) : buffer_(buffer), start_(&buffer[0])
+    FormatBuf(Buffer<Char> &buffer)
+        : buffer_(buffer)
     {
-        this->setp(start_, start_ + buffer_.capacity());
     }
 
-    int_type overflow(int_type ch = traits_type::eof())
+protected:
+    // The put-area is actually always empty. This makes the implementation
+    // simpler and has the advantage that the streambuf and the buffer are always
+    // in sync and sputc never writes into uninitialized memory. The obvious
+    // disadvantage is that each call to sputc always results in a (virtual) call
+    // to overflow. There is no disadvantage here for sputn since this always
+    // results in a call to xsputn.
+
+    int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE
     {
         if (!traits_type::eq_int_type(ch, traits_type::eof()))
-        {
-            size_t buf_size = size();
-            buffer_.resize(buf_size);
-            buffer_.reserve(buf_size * 2);
-
-            start_ = &buffer_[0];
-            start_[buf_size] = traits_type::to_char_type(ch);
-            this->setp(start_+ buf_size + 1, start_ + buf_size * 2);
-        }
+            buffer_.push_back(static_cast<Char>(ch));
         return ch;
     }
 
-    size_t size() const
+    std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE
     {
-        return to_unsigned(this->pptr() - start_);
+        buffer_.append(s, s + count);
+        return count;
     }
 };
 
@@ -61,9 +58,11 @@ Yes &convert(std::ostream &);
 
 struct DummyStream : std::ostream
 {
-    DummyStream();  // Suppress a bogus warning in MSVC.
+    DummyStream(); // Suppress a bogus warning in MSVC.
+
     // Hide all operator<< overloads from std::ostream.
-    void operator<<(Null<>);
+    template<typename T>
+    typename EnableIf<sizeof(T) == 0>::type operator<<(const T &);
 };
 
 No &operator<<(std::ostream &, int);
@@ -77,21 +76,24 @@ struct ConvertToIntImpl<T, true>
         value = sizeof(convert(get<DummyStream>() << get<T>())) == sizeof(No)
     };
 };
-}  // namespace internal
+
+// Write the content of w to os.
+FMT_API void write(std::ostream &os, Writer &w);
+} // namespace internal
 
 // Formats a value.
-template <typename Char, typename ArgFormatter, typename T>
-void format(BasicFormatter<Char, ArgFormatter> &f,
-            const Char *&format_str, const T &value)
+template<typename Char, typename ArgFormatter_, typename T>
+void format_arg(BasicFormatter<Char, ArgFormatter_> &f, const Char *&format_str, const T &value)
 {
     internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
 
     internal::FormatBuf<Char> format_buf(buffer);
     std::basic_ostream<Char> output(&format_buf);
+    output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
     output << value;
 
-    BasicStringRef<Char> str(&buffer[0], format_buf.size());
-    typedef internal::MakeArg< BasicFormatter<Char> > MakeArg;
+    BasicStringRef<Char> str(&buffer[0], buffer.size());
+    typedef internal::MakeArg<BasicFormatter<Char>> MakeArg;
     format_str = f.format(format_str, MakeArg(str));
 }
 
@@ -106,22 +108,10 @@ void format(BasicFormatter<Char, ArgFormatter> &f,
  */
 FMT_API void print(std::ostream &os, CStringRef format_str, ArgList args);
 FMT_VARIADIC(void, print, std::ostream &, CStringRef)
-
-/**
-  \rst
-  Prints formatted data to the stream *os*.
-
-  **Example**::
-
-    fprintf(cerr, "Don't %s!", "panic");
-  \endrst
- */
-FMT_API int fprintf(std::ostream &os, CStringRef format_str, ArgList args);
-FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
-}  // namespace fmt
+} // namespace fmt
 
 #ifdef FMT_HEADER_ONLY
-# include "ostream.cc"
+#include "ostream.cc"
 #endif
 
-#endif  // FMT_OSTREAM_H_
+#endif // FMT_OSTREAM_H_

include/spdlog/fmt/bundled/posix.cc

@@ -0,0 +1,241 @@
+/*
+ A C++ interface to POSIX functions.
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+// Disable bogus MSVC warnings.
+#ifndef _CRT_SECURE_NO_WARNINGS
+# define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "posix.h"
+
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifndef _WIN32
+# include <unistd.h>
+#else
+# ifndef WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+# endif
+# include <windows.h>
+# include <io.h>
+
+# define O_CREAT _O_CREAT
+# define O_TRUNC _O_TRUNC
+
+# ifndef S_IRUSR
+#  define S_IRUSR _S_IREAD
+# endif
+
+# ifndef S_IWUSR
+#  define S_IWUSR _S_IWRITE
+# endif
+
+# ifdef __MINGW32__
+#  define _SH_DENYNO 0x40
+# endif
+
+#endif  // _WIN32
+
+#ifdef fileno
+# undef fileno
+#endif
+
+namespace {
+#ifdef _WIN32
+// Return type of read and write functions.
+typedef int RWResult;
+
+// On Windows the count argument to read and write is unsigned, so convert
+// it from size_t preventing integer overflow.
+inline unsigned convert_rwcount(std::size_t count) {
+  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
+}
+#else
+// Return type of read and write functions.
+typedef ssize_t RWResult;
+
+inline std::size_t convert_rwcount(std::size_t count) { return count; }
+#endif
+}
+
+fmt::BufferedFile::~BufferedFile() FMT_NOEXCEPT {
+  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
+    fmt::report_system_error(errno, "cannot close file");
+}
+
+fmt::BufferedFile::BufferedFile(
+    fmt::CStringRef filename, fmt::CStringRef mode) {
+  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())), 0);
+  if (!file_)
+    FMT_THROW(SystemError(errno, "cannot open file {}", filename));
+}
+
+void fmt::BufferedFile::close() {
+  if (!file_)
+    return;
+  int result = FMT_SYSTEM(fclose(file_));
+  file_ = FMT_NULL;
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot close file"));
+}
+
+// A macro used to prevent expansion of fileno on broken versions of MinGW.
+#define FMT_ARGS
+
+int fmt::BufferedFile::fileno() const {
+  int fd = FMT_POSIX_CALL(fileno FMT_ARGS(file_));
+  if (fd == -1)
+    FMT_THROW(SystemError(errno, "cannot get file descriptor"));
+  return fd;
+}
+
+fmt::File::File(fmt::CStringRef path, int oflag) {
+  int mode = S_IRUSR | S_IWUSR;
+#if defined(_WIN32) && !defined(__MINGW32__)
+  fd_ = -1;
+  FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
+#else
+  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
+#endif
+  if (fd_ == -1)
+    FMT_THROW(SystemError(errno, "cannot open file {}", path));
+}
+
+fmt::File::~File() FMT_NOEXCEPT {
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
+    fmt::report_system_error(errno, "cannot close file");
+}
+
+void fmt::File::close() {
+  if (fd_ == -1)
+    return;
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  int result = FMT_POSIX_CALL(close(fd_));
+  fd_ = -1;
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot close file"));
+}
+
+fmt::LongLong fmt::File::size() const {
+#ifdef _WIN32
+  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
+  // is less than 0x0500 as is the case with some default MinGW builds.
+  // Both functions support large file sizes.
+  DWORD size_upper = 0;
+  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
+  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
+  if (size_lower == INVALID_FILE_SIZE) {
+    DWORD error = GetLastError();
+    if (error != NO_ERROR)
+      FMT_THROW(WindowsError(GetLastError(), "cannot get file size"));
+  }
+  fmt::ULongLong long_size = size_upper;
+  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
+#else
+  typedef struct stat Stat;
+  Stat file_stat = Stat();
+  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
+    FMT_THROW(SystemError(errno, "cannot get file attributes"));
+  FMT_STATIC_ASSERT(sizeof(fmt::LongLong) >= sizeof(file_stat.st_size),
+      "return type of File::size is not large enough");
+  return file_stat.st_size;
+#endif
+}
+
+std::size_t fmt::File::read(void *buffer, std::size_t count) {
+  RWResult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(SystemError(errno, "cannot read from file"));
+  return internal::to_unsigned(result);
+}
+
+std::size_t fmt::File::write(const void *buffer, std::size_t count) {
+  RWResult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(SystemError(errno, "cannot write to file"));
+  return internal::to_unsigned(result);
+}
+
+fmt::File fmt::File::dup(int fd) {
+  // Don't retry as dup doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
+  int new_fd = FMT_POSIX_CALL(dup(fd));
+  if (new_fd == -1)
+    FMT_THROW(SystemError(errno, "cannot duplicate file descriptor {}", fd));
+  return File(new_fd);
+}
+
+void fmt::File::dup2(int fd) {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) {
+    FMT_THROW(SystemError(errno,
+      "cannot duplicate file descriptor {} to {}", fd_, fd));
+  }
+}
+
+void fmt::File::dup2(int fd, ErrorCode &ec) FMT_NOEXCEPT {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1)
+    ec = ErrorCode(errno);
+}
+
+void fmt::File::pipe(File &read_end, File &write_end) {
+  // Close the descriptors first to make sure that assignments don't throw
+  // and there are no leaks.
+  read_end.close();
+  write_end.close();
+  int fds[2] = {};
+#ifdef _WIN32
+  // Make the default pipe capacity same as on Linux 2.6.11+.
+  enum { DEFAULT_CAPACITY = 65536 };
+  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
+#else
+  // Don't retry as the pipe function doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
+  int result = FMT_POSIX_CALL(pipe(fds));
+#endif
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot create pipe"));
+  // The following assignments don't throw because read_fd and write_fd
+  // are closed.
+  read_end = File(fds[0]);
+  write_end = File(fds[1]);
+}
+
+fmt::BufferedFile fmt::File::fdopen(const char *mode) {
+  // Don't retry as fdopen doesn't return EINTR.
+  FILE *f = FMT_POSIX_CALL(fdopen(fd_, mode));
+  if (!f)
+    FMT_THROW(SystemError(errno, "cannot associate stream with file descriptor"));
+  BufferedFile file(f);
+  fd_ = -1;
+  return file;
+}
+
+long fmt::getpagesize() {
+#ifdef _WIN32
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+#else
+  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
+  if (size < 0)
+    FMT_THROW(SystemError(errno, "cannot get memory page size"));
+  return size;
+#endif
+}

include/spdlog/fmt/bundled/posix.h

@@ -0,0 +1,423 @@
+/*
+ A C++ interface to POSIX functions.
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_POSIX_H_
+#define FMT_POSIX_H_
+
+#if defined(__MINGW32__) || defined(__CYGWIN__)
+// Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/.
+#undef __STRICT_ANSI__
+#endif
+
+#include <errno.h>
+#include <fcntl.h>  // for O_RDONLY
+#include <locale.h> // for locale_t
+#include <stdio.h>
+#include <stdlib.h> // for strtod_l
+
+#include <cstddef>
+
+#if defined __APPLE__ || defined(__FreeBSD__)
+#include <xlocale.h> // for LC_NUMERIC_MASK on OS X
+#endif
+
+#include "format.h"
+
+#ifndef FMT_POSIX
+#if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+#define FMT_POSIX(call) _##call
+#else
+#define FMT_POSIX(call) call
+#endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+#define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+#define FMT_SYSTEM(call) call
+#ifdef _WIN32
+// Fix warnings about deprecated symbols.
+#define FMT_POSIX_CALL(call) ::_##call
+#else
+#define FMT_POSIX_CALL(call) ::call
+#endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+#define FMT_RETRY_VAL(result, expression, error_result)                                                                                    \
+    do                                                                                                                                     \
+    {                                                                                                                                      \
+        result = (expression);                                                                                                             \
+    } while (result == error_result && errno == EINTR)
+#else
+#define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+namespace fmt {
+
+// An error code.
+class ErrorCode
+{
+private:
+    int value_;
+
+public:
+    explicit ErrorCode(int value = 0) FMT_NOEXCEPT : value_(value) {}
+
+    int get() const FMT_NOEXCEPT
+    {
+        return value_;
+    }
+};
+
+// A buffered file.
+class BufferedFile
+{
+private:
+    FILE *file_;
+
+    friend class File;
+
+    explicit BufferedFile(FILE *f)
+        : file_(f)
+    {
+    }
+
+public:
+    // Constructs a BufferedFile object which doesn't represent any file.
+    BufferedFile() FMT_NOEXCEPT : file_(FMT_NULL) {}
+
+    // Destroys the object closing the file it represents if any.
+    FMT_API ~BufferedFile() FMT_NOEXCEPT;
+
+#if !FMT_USE_RVALUE_REFERENCES
+    // Emulate a move constructor and a move assignment operator if rvalue
+    // references are not supported.
+
+private:
+    // A proxy object to emulate a move constructor.
+    // It is private to make it impossible call operator Proxy directly.
+    struct Proxy
+    {
+        FILE *file;
+    };
+
+public:
+    // A "move constructor" for moving from a temporary.
+    BufferedFile(Proxy p) FMT_NOEXCEPT : file_(p.file) {}
+
+    // A "move constructor" for moving from an lvalue.
+    BufferedFile(BufferedFile &f) FMT_NOEXCEPT : file_(f.file_)
+    {
+        f.file_ = FMT_NULL;
+    }
+
+    // A "move assignment operator" for moving from a temporary.
+    BufferedFile &operator=(Proxy p)
+    {
+        close();
+        file_ = p.file;
+        return *this;
+    }
+
+    // A "move assignment operator" for moving from an lvalue.
+    BufferedFile &operator=(BufferedFile &other)
+    {
+        close();
+        file_ = other.file_;
+        other.file_ = FMT_NULL;
+        return *this;
+    }
+
+    // Returns a proxy object for moving from a temporary:
+    //   BufferedFile file = BufferedFile(...);
+    operator Proxy() FMT_NOEXCEPT
+    {
+        Proxy p = {file_};
+        file_ = FMT_NULL;
+        return p;
+    }
+
+#else
+private:
+    FMT_DISALLOW_COPY_AND_ASSIGN(BufferedFile);
+
+public:
+    BufferedFile(BufferedFile &&other) FMT_NOEXCEPT : file_(other.file_)
+    {
+        other.file_ = FMT_NULL;
+    }
+
+    BufferedFile &operator=(BufferedFile &&other)
+    {
+        close();
+        file_ = other.file_;
+        other.file_ = FMT_NULL;
+        return *this;
+    }
+#endif
+
+    // Opens a file.
+    FMT_API BufferedFile(CStringRef filename, CStringRef mode);
+
+    // Closes the file.
+    FMT_API void close();
+
+    // Returns the pointer to a FILE object representing this file.
+    FILE *get() const FMT_NOEXCEPT
+    {
+        return file_;
+    }
+
+    // We place parentheses around fileno to workaround a bug in some versions
+    // of MinGW that define fileno as a macro.
+    FMT_API int(fileno)() const;
+
+    void print(CStringRef format_str, const ArgList &args)
+    {
+        fmt::print(file_, format_str, args);
+    }
+    FMT_VARIADIC(void, print, CStringRef)
+};
+
+// A file. Closed file is represented by a File object with descriptor -1.
+// Methods that are not declared with FMT_NOEXCEPT may throw
+// fmt::SystemError in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class File
+{
+private:
+    int fd_; // File descriptor.
+
+    // Constructs a File object with a given descriptor.
+    explicit File(int fd)
+        : fd_(fd)
+    {
+    }
+
+public:
+    // Possible values for the oflag argument to the constructor.
+    enum
+    {
+        RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
+        WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
+        RDWR = FMT_POSIX(O_RDWR)      // Open for reading and writing.
+    };
+
+    // Constructs a File object which doesn't represent any file.
+    File() FMT_NOEXCEPT : fd_(-1) {}
+
+    // Opens a file and constructs a File object representing this file.
+    FMT_API File(CStringRef path, int oflag);
+
+#if !FMT_USE_RVALUE_REFERENCES
+    // Emulate a move constructor and a move assignment operator if rvalue
+    // references are not supported.
+
+private:
+    // A proxy object to emulate a move constructor.
+    // It is private to make it impossible call operator Proxy directly.
+    struct Proxy
+    {
+        int fd;
+    };
+
+public:
+    // A "move constructor" for moving from a temporary.
+    File(Proxy p) FMT_NOEXCEPT : fd_(p.fd) {}
+
+    // A "move constructor" for moving from an lvalue.
+    File(File &other) FMT_NOEXCEPT : fd_(other.fd_)
+    {
+        other.fd_ = -1;
+    }
+
+    // A "move assignment operator" for moving from a temporary.
+    File &operator=(Proxy p)
+    {
+        close();
+        fd_ = p.fd;
+        return *this;
+    }
+
+    // A "move assignment operator" for moving from an lvalue.
+    File &operator=(File &other)
+    {
+        close();
+        fd_ = other.fd_;
+        other.fd_ = -1;
+        return *this;
+    }
+
+    // Returns a proxy object for moving from a temporary:
+    //   File file = File(...);
+    operator Proxy() FMT_NOEXCEPT
+    {
+        Proxy p = {fd_};
+        fd_ = -1;
+        return p;
+    }
+
+#else
+private:
+    FMT_DISALLOW_COPY_AND_ASSIGN(File);
+
+public:
+    File(File &&other) FMT_NOEXCEPT : fd_(other.fd_)
+    {
+        other.fd_ = -1;
+    }
+
+    File &operator=(File &&other)
+    {
+        close();
+        fd_ = other.fd_;
+        other.fd_ = -1;
+        return *this;
+    }
+#endif
+
+    // Destroys the object closing the file it represents if any.
+    FMT_API ~File() FMT_NOEXCEPT;
+
+    // Returns the file descriptor.
+    int descriptor() const FMT_NOEXCEPT
+    {
+        return fd_;
+    }
+
+    // Closes the file.
+    FMT_API void close();
+
+    // Returns the file size. The size has signed type for consistency with
+    // stat::st_size.
+    FMT_API LongLong size() const;
+
+    // Attempts to read count bytes from the file into the specified buffer.
+    FMT_API std::size_t read(void *buffer, std::size_t count);
+
+    // Attempts to write count bytes from the specified buffer to the file.
+    FMT_API std::size_t write(const void *buffer, std::size_t count);
+
+    // Duplicates a file descriptor with the dup function and returns
+    // the duplicate as a file object.
+    FMT_API static File dup(int fd);
+
+    // Makes fd be the copy of this file descriptor, closing fd first if
+    // necessary.
+    FMT_API void dup2(int fd);
+
+    // Makes fd be the copy of this file descriptor, closing fd first if
+    // necessary.
+    FMT_API void dup2(int fd, ErrorCode &ec) FMT_NOEXCEPT;
+
+    // Creates a pipe setting up read_end and write_end file objects for reading
+    // and writing respectively.
+    FMT_API static void pipe(File &read_end, File &write_end);
+
+    // Creates a BufferedFile object associated with this file and detaches
+    // this File object from the file.
+    FMT_API BufferedFile fdopen(const char *mode);
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && !defined(__ANDROID__) && !defined(__CYGWIN__)
+#define FMT_LOCALE
+#endif
+
+#ifdef FMT_LOCALE
+// A "C" numeric locale.
+class Locale
+{
+private:
+#ifdef _MSC_VER
+    typedef _locale_t locale_t;
+
+    enum
+    {
+        LC_NUMERIC_MASK = LC_NUMERIC
+    };
+
+    static locale_t newlocale(int category_mask, const char *locale, locale_t)
+    {
+        return _create_locale(category_mask, locale);
+    }
+
+    static void freelocale(locale_t locale)
+    {
+        _free_locale(locale);
+    }
+
+    static double strtod_l(const char *nptr, char **endptr, _locale_t locale)
+    {
+        return _strtod_l(nptr, endptr, locale);
+    }
+#endif
+
+    locale_t locale_;
+
+    FMT_DISALLOW_COPY_AND_ASSIGN(Locale);
+
+public:
+    typedef locale_t Type;
+
+    Locale()
+        : locale_(newlocale(LC_NUMERIC_MASK, "C", FMT_NULL))
+    {
+        if (!locale_)
+            FMT_THROW(fmt::SystemError(errno, "cannot create locale"));
+    }
+    ~Locale()
+    {
+        freelocale(locale_);
+    }
+
+    Type get() const
+    {
+        return locale_;
+    }
+
+    // Converts string to floating-point number and advances str past the end
+    // of the parsed input.
+    double strtod(const char *&str) const
+    {
+        char *end = FMT_NULL;
+        double result = strtod_l(str, &end, locale_);
+        str = end;
+        return result;
+    }
+};
+#endif // FMT_LOCALE
+} // namespace fmt
+
+#if !FMT_USE_RVALUE_REFERENCES
+namespace std {
+// For compatibility with C++98.
+inline fmt::BufferedFile &move(fmt::BufferedFile &f)
+{
+    return f;
+}
+inline fmt::File &move(fmt::File &f)
+{
+    return f;
+}
+} // namespace std
+#endif
+
+#endif // FMT_POSIX_H_

include/spdlog/fmt/bundled/printf.cc

@@ -0,0 +1,32 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#include "format.h"
+#include "printf.h"
+
+namespace fmt {
+
+template <typename Char>
+void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args);
+
+FMT_FUNC int fprintf(std::FILE *f, CStringRef format, ArgList args) {
+  MemoryWriter w;
+  printf(w, format, args);
+  std::size_t size = w.size();
+  return std::fwrite(w.data(), 1, size, f) < size ? -1 : static_cast<int>(size);
+}
+
+#ifndef FMT_HEADER_ONLY
+
+template void PrintfFormatter<char>::format(CStringRef format);
+template void PrintfFormatter<wchar_t>::format(WCStringRef format);
+
+#endif  // FMT_HEADER_ONLY
+
+}  // namespace fmt

include/spdlog/fmt/bundled/printf.h

@@ -10,22 +10,20 @@
 #ifndef FMT_PRINTF_H_
 #define FMT_PRINTF_H_
 
-#include <algorithm>  // std::fill_n
-#include <limits>     // std::numeric_limits
+#include <algorithm> // std::fill_n
+#include <limits>    // std::numeric_limits
 
-#include "fmt/format.h"
+#include "ostream.h"
 
-namespace fmt
-{
-namespace internal
-{
+namespace fmt {
+namespace internal {
 
 // Checks if a value fits in int - used to avoid warnings about comparing
 // signed and unsigned integers.
-template <bool IsSigned>
+template<bool IsSigned>
 struct IntChecker
 {
-    template <typename T>
+    template<typename T>
     static bool fits_in_int(T value)
     {
         unsigned max = std::numeric_limits<int>::max();
@@ -37,14 +35,13 @@ struct IntChecker
     }
 };
 
-template <>
+template<>
 struct IntChecker<true>
 {
-    template <typename T>
+    template<typename T>
     static bool fits_in_int(T value)
     {
-        return value >= std::numeric_limits<int>::min() &&
-               value <= std::numeric_limits<int>::max();
+        return value >= std::numeric_limits<int>::min() && value <= std::numeric_limits<int>::max();
     }
     static bool fits_in_int(int)
     {
@@ -60,7 +57,7 @@ public:
         FMT_THROW(FormatError("precision is not integer"));
     }
 
-    template <typename T>
+    template<typename T>
     int visit_any_int(T value)
     {
         if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
@@ -73,30 +70,73 @@ public:
 class IsZeroInt : public ArgVisitor<IsZeroInt, bool>
 {
 public:
-    template <typename T>
+    template<typename T>
     bool visit_any_int(T value)
     {
         return value == 0;
     }
 };
 
-template <typename T, typename U>
-struct is_same
+// returns the default type for format specific "%s"
+class DefaultType : public ArgVisitor<DefaultType, char>
 {
-    enum { value = 0 };
+public:
+    char visit_char(int)
+    {
+        return 'c';
+    }
+
+    char visit_bool(bool)
+    {
+        return 's';
+    }
+
+    char visit_pointer(const void *)
+    {
+        return 'p';
+    }
+
+    template<typename T>
+    char visit_any_int(T)
+    {
+        return 'd';
+    }
+
+    template<typename T>
+    char visit_any_double(T)
+    {
+        return 'g';
+    }
+
+    char visit_unhandled_arg()
+    {
+        return 's';
+    }
 };
 
-template <typename T>
+template<typename T, typename U>
+struct is_same
+{
+    enum
+    {
+        value = 0
+    };
+};
+
+template<typename T>
 struct is_same<T, T>
 {
-    enum { value = 1 };
+    enum
+    {
+        value = 1
+    };
 };
 
 // An argument visitor that converts an integer argument to T for printf,
 // if T is an integral type. If T is void, the argument is converted to
 // corresponding signed or unsigned type depending on the type specifier:
 // 'd' and 'i' - signed, other - unsigned)
-template <typename T = void>
+template<typename T = void>
 class ArgConverter : public ArgVisitor<ArgConverter<T>, void>
 {
 private:
@@ -107,7 +147,10 @@ private:
 
 public:
     ArgConverter(internal::Arg &arg, wchar_t type)
-        : arg_(arg), type_(type) {}
+        : arg_(arg)
+        , type_(type)
+    {
+    }
 
     void visit_bool(bool value)
     {
@@ -115,14 +158,24 @@ public:
             visit_any_int(value);
     }
 
-    template <typename U>
+    void visit_char(int value)
+    {
+        if (type_ != 's')
+            visit_any_int(value);
+    }
+
+    template<typename U>
     void visit_any_int(U value)
     {
         bool is_signed = type_ == 'd' || type_ == 'i';
+        if (type_ == 's')
+        {
+            is_signed = std::numeric_limits<U>::is_signed;
+        }
+
         using internal::Arg;
-        typedef typename internal::Conditional<
-        is_same<T, void>::value, U, T>::type TargetType;
-        if (sizeof(TargetType) <= sizeof(int))
+        typedef typename internal::Conditional<is_same<T, void>::value, U, T>::type TargetType;
+        if (const_check(sizeof(TargetType) <= sizeof(int)))
         {
             // Extra casts are used to silence warnings.
             if (is_signed)
@@ -150,8 +203,7 @@ public:
             else
             {
                 arg_.type = Arg::ULONG_LONG;
-                arg_.ulong_long_value =
-                    static_cast<typename internal::MakeUnsigned<U>::Type>(value);
+                arg_.ulong_long_value = static_cast<typename internal::MakeUnsigned<U>::Type>(value);
             }
         }
     }
@@ -166,9 +218,12 @@ private:
     FMT_DISALLOW_COPY_AND_ASSIGN(CharConverter);
 
 public:
-    explicit CharConverter(internal::Arg &arg) : arg_(arg) {}
+    explicit CharConverter(internal::Arg &arg)
+        : arg_(arg)
+    {
+    }
 
-    template <typename T>
+    template<typename T>
     void visit_any_int(T value)
     {
         arg_.type = internal::Arg::CHAR;
@@ -186,14 +241,17 @@ private:
     FMT_DISALLOW_COPY_AND_ASSIGN(WidthHandler);
 
 public:
-    explicit WidthHandler(FormatSpec &spec) : spec_(spec) {}
+    explicit WidthHandler(FormatSpec &spec)
+        : spec_(spec)
+    {
+    }
 
     void report_unhandled_arg()
     {
         FMT_THROW(FormatError("width is not integer"));
     }
 
-    template <typename T>
+    template<typename T>
     unsigned visit_any_int(T value)
     {
         typedef typename internal::IntTraits<T>::MainType UnsignedType;
@@ -209,7 +267,7 @@ public:
         return static_cast<unsigned>(width);
     }
 };
-}  // namespace internal
+} // namespace internal
 
 /**
   \rst
@@ -228,8 +286,8 @@ public:
   superclass will be called.
   \endrst
  */
-template <typename Impl, typename Char>
-class BasicPrintfArgFormatter : public internal::ArgFormatterBase<Impl, Char>
+template<typename Impl, typename Char, typename Spec>
+class BasicPrintfArgFormatter : public internal::ArgFormatterBase<Impl, Char, Spec>
 {
 private:
     void write_null_pointer()
@@ -238,7 +296,7 @@ private:
         this->write("(nil)");
     }
 
-    typedef internal::ArgFormatterBase<Impl, Char> Base;
+    typedef internal::ArgFormatterBase<Impl, Char, Spec> Base;
 
 public:
     /**
@@ -248,13 +306,15 @@ public:
       specifier information for standard argument types.
       \endrst
      */
-    BasicPrintfArgFormatter(BasicWriter<Char> &writer, FormatSpec &spec)
-        : internal::ArgFormatterBase<Impl, Char>(writer, spec) {}
+    BasicPrintfArgFormatter(BasicWriter<Char> &w, Spec &s)
+        : internal::ArgFormatterBase<Impl, Char, Spec>(w, s)
+    {
+    }
 
     /** Formats an argument of type ``bool``. */
     void visit_bool(bool value)
     {
-        FormatSpec &fmt_spec = this->spec();
+        Spec &fmt_spec = this->spec();
         if (fmt_spec.type_ != 's')
             return this->visit_any_int(value);
         fmt_spec.type_ = 0;
@@ -264,7 +324,7 @@ public:
     /** Formats a character. */
     void visit_char(int value)
     {
-        const FormatSpec &fmt_spec = this->spec();
+        const Spec &fmt_spec = this->spec();
         BasicWriter<Char> &w = this->writer();
         if (fmt_spec.type_ && fmt_spec.type_ != 'c')
             w.write_int(value, fmt_spec);
@@ -322,18 +382,19 @@ public:
 };
 
 /** The default printf argument formatter. */
-template <typename Char>
-class PrintfArgFormatter
-    : public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>
+template<typename Char>
+class PrintfArgFormatter : public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char, FormatSpec>
 {
 public:
     /** Constructs an argument formatter object. */
     PrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
-        : BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char>(w, s) {}
+        : BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char, FormatSpec>(w, s)
+    {
+    }
 };
 
 /** This template formats data and writes the output to a writer. */
-template <typename Char, typename ArgFormatter = PrintfArgFormatter<Char> >
+template<typename Char, typename ArgFormatter = PrintfArgFormatter<Char>>
 class PrintfFormatter : private internal::FormatterBase
 {
 private:
@@ -343,9 +404,7 @@ private:
 
     // Returns the argument with specified index or, if arg_index is equal
     // to the maximum unsigned value, the next argument.
-    internal::Arg get_arg(
-        const Char *s,
-        unsigned arg_index = (std::numeric_limits<unsigned>::max)());
+    internal::Arg get_arg(const Char *s, unsigned arg_index = (std::numeric_limits<unsigned>::max)());
 
     // Parses argument index, flags and width and returns the argument index.
     unsigned parse_header(const Char *&s, FormatSpec &spec);
@@ -358,14 +417,17 @@ public:
      appropriate lifetimes.
      \endrst
      */
-    explicit PrintfFormatter(const ArgList &args, BasicWriter<Char> &w)
-        : FormatterBase(args), writer_(w) {}
+    explicit PrintfFormatter(const ArgList &al, BasicWriter<Char> &w)
+        : FormatterBase(al)
+        , writer_(w)
+    {
+    }
 
     /** Formats stored arguments and writes the output to the writer. */
-    FMT_API void format(BasicCStringRef<Char> format_str);
+    void format(BasicCStringRef<Char> format_str);
 };
 
-template <typename Char, typename AF>
+template<typename Char, typename AF>
 void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s)
 {
     for (;;)
@@ -394,22 +456,19 @@ void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s)
     }
 }
 
-template <typename Char, typename AF>
-internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s,
-        unsigned arg_index)
+template<typename Char, typename AF>
+internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s, unsigned arg_index)
 {
     (void)s;
-    const char *error = 0;
-    internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ?
-                        next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
+    const char *error = FMT_NULL;
+    internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ? next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
     if (error)
         FMT_THROW(FormatError(!*s ? "invalid format string" : error));
     return arg;
 }
 
-template <typename Char, typename AF>
-unsigned PrintfFormatter<Char, AF>::parse_header(
-    const Char *&s, FormatSpec &spec)
+template<typename Char, typename AF>
+unsigned PrintfFormatter<Char, AF>::parse_header(const Char *&s, FormatSpec &spec)
 {
     unsigned arg_index = std::numeric_limits<unsigned>::max();
     Char c = *s;
@@ -418,7 +477,7 @@ unsigned PrintfFormatter<Char, AF>::parse_header(
         // Parse an argument index (if followed by '$') or a width possibly
         // preceded with '0' flag(s).
         unsigned value = internal::parse_nonnegative_int(s);
-        if (*s == '$')    // value is an argument index
+        if (*s == '$') // value is an argument index
         {
             ++s;
             arg_index = value;
@@ -450,7 +509,7 @@ unsigned PrintfFormatter<Char, AF>::parse_header(
     return arg_index;
 }
 
-template <typename Char, typename AF>
+template<typename Char, typename AF>
 void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
 {
     const Char *start = format_str.c_str();
@@ -458,7 +517,8 @@ void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
     while (*s)
     {
         Char c = *s++;
-        if (c != '%') continue;
+        if (c != '%')
+            continue;
         if (*s == c)
         {
             write(writer_, start, s);
@@ -486,6 +546,10 @@ void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
                 ++s;
                 spec.precision_ = internal::PrecisionHandler().visit(get_arg(s));
             }
+            else
+            {
+                spec.precision_ = 0;
+            }
         }
 
         using internal::Arg;
@@ -497,7 +561,7 @@ void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
             if (arg.type <= Arg::LAST_NUMERIC_TYPE)
                 spec.align_ = ALIGN_NUMERIC;
             else
-                spec.fill_ = ' ';  // Ignore '0' flag for non-numeric types.
+                spec.fill_ = ' '; // Ignore '0' flag for non-numeric types.
         }
 
         // Parse length and convert the argument to the required type.
@@ -538,6 +602,13 @@ void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
         if (!*s)
             FMT_THROW(FormatError("invalid format string"));
         spec.type_ = static_cast<char>(*s++);
+
+        if (spec.type_ == 's')
+        {
+            // set the format type to the default if 's' is specified
+            spec.type_ = internal::DefaultType().visit(arg);
+        }
+
         if (arg.type <= Arg::LAST_INTEGER_TYPE)
         {
             // Normalize type.
@@ -562,11 +633,17 @@ void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str)
     write(writer_, start, s);
 }
 
-template <typename Char>
-void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args)
+inline void printf(Writer &w, CStringRef format, ArgList args)
 {
-    PrintfFormatter<Char>(args, w).format(format);
+    PrintfFormatter<char>(args, w).format(format);
 }
+FMT_VARIADIC(void, printf, Writer &, CStringRef)
+
+inline void printf(WWriter &w, WCStringRef format, ArgList args)
+{
+    PrintfFormatter<wchar_t>(args, w).format(format);
+}
+FMT_VARIADIC(void, printf, WWriter &, WCStringRef)
 
 /**
   \rst
@@ -619,6 +696,28 @@ inline int printf(CStringRef format, ArgList args)
     return fprintf(stdout, format, args);
 }
 FMT_VARIADIC(int, printf, CStringRef)
-}  // namespace fmt
 
-#endif  // FMT_PRINTF_H_
+/**
+  \rst
+  Prints formatted data to the stream *os*.
+
+  **Example**::
+
+    fprintf(cerr, "Don't %s!", "panic");
+  \endrst
+ */
+inline int fprintf(std::ostream &os, CStringRef format_str, ArgList args)
+{
+    MemoryWriter w;
+    printf(w, format_str, args);
+    internal::write(os, w);
+    return static_cast<int>(w.size());
+}
+FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
+} // namespace fmt
+
+#ifdef FMT_HEADER_ONLY
+#include "printf.cc"
+#endif
+
+#endif // FMT_PRINTF_H_

include/spdlog/fmt/bundled/time.h

@@ -0,0 +1,188 @@
+/*
+ Formatting library for C++ - time formatting
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_TIME_H_
+#define FMT_TIME_H_
+
+#include "format.h"
+#include <ctime>
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4702) // unreachable code
+#pragma warning(disable : 4996) // "deprecated" functions
+#endif
+
+namespace fmt {
+template<typename ArgFormatter>
+void format_arg(BasicFormatter<char, ArgFormatter> &f, const char *&format_str, const std::tm &tm)
+{
+    if (*format_str == ':')
+        ++format_str;
+    const char *end = format_str;
+    while (*end && *end != '}')
+        ++end;
+    if (*end != '}')
+        FMT_THROW(FormatError("missing '}' in format string"));
+    internal::MemoryBuffer<char, internal::INLINE_BUFFER_SIZE> format;
+    format.append(format_str, end + 1);
+    format[format.size() - 1] = '\0';
+    Buffer<char> &buffer = f.writer().buffer();
+    std::size_t start = buffer.size();
+    for (;;)
+    {
+        std::size_t size = buffer.capacity() - start;
+        std::size_t count = std::strftime(&buffer[start], size, &format[0], &tm);
+        if (count != 0)
+        {
+            buffer.resize(start + count);
+            break;
+        }
+        if (size >= format.size() * 256)
+        {
+            // If the buffer is 256 times larger than the format string, assume
+            // that `strftime` gives an empty result. There doesn't seem to be a
+            // better way to distinguish the two cases:
+            // https://github.com/fmtlib/fmt/issues/367
+            break;
+        }
+        const std::size_t MIN_GROWTH = 10;
+        buffer.reserve(buffer.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
+    }
+    format_str = end + 1;
+}
+
+namespace internal {
+inline Null<> localtime_r(...)
+{
+    return Null<>();
+}
+inline Null<> localtime_s(...)
+{
+    return Null<>();
+}
+inline Null<> gmtime_r(...)
+{
+    return Null<>();
+}
+inline Null<> gmtime_s(...)
+{
+    return Null<>();
+}
+} // namespace internal
+
+// Thread-safe replacement for std::localtime
+inline std::tm localtime(std::time_t time)
+{
+    struct LocalTime
+    {
+        std::time_t time_;
+        std::tm tm_;
+
+        LocalTime(std::time_t t)
+            : time_(t)
+        {
+        }
+
+        bool run()
+        {
+            using namespace fmt::internal;
+            return handle(localtime_r(&time_, &tm_));
+        }
+
+        bool handle(std::tm *tm)
+        {
+            return tm != FMT_NULL;
+        }
+
+        bool handle(internal::Null<>)
+        {
+            using namespace fmt::internal;
+            return fallback(localtime_s(&tm_, &time_));
+        }
+
+        bool fallback(int res)
+        {
+            return res == 0;
+        }
+
+        bool fallback(internal::Null<>)
+        {
+            using namespace fmt::internal;
+            std::tm *tm = std::localtime(&time_);
+            if (tm)
+                tm_ = *tm;
+            return tm != FMT_NULL;
+        }
+    };
+    LocalTime lt(time);
+    if (lt.run())
+        return lt.tm_;
+    // Too big time values may be unsupported.
+    FMT_THROW(fmt::FormatError("time_t value out of range"));
+    return std::tm();
+}
+
+// Thread-safe replacement for std::gmtime
+inline std::tm gmtime(std::time_t time)
+{
+    struct GMTime
+    {
+        std::time_t time_;
+        std::tm tm_;
+
+        GMTime(std::time_t t)
+            : time_(t)
+        {
+        }
+
+        bool run()
+        {
+            using namespace fmt::internal;
+            return handle(gmtime_r(&time_, &tm_));
+        }
+
+        bool handle(std::tm *tm)
+        {
+            return tm != FMT_NULL;
+        }
+
+        bool handle(internal::Null<>)
+        {
+            using namespace fmt::internal;
+            return fallback(gmtime_s(&tm_, &time_));
+        }
+
+        bool fallback(int res)
+        {
+            return res == 0;
+        }
+
+        bool fallback(internal::Null<>)
+        {
+            std::tm *tm = std::gmtime(&time_);
+            if (tm != FMT_NULL)
+                tm_ = *tm;
+            return tm != FMT_NULL;
+        }
+    };
+    GMTime gt(time);
+    if (gt.run())
+        return gt.tm_;
+    // Too big time values may be unsupported.
+    FMT_THROW(fmt::FormatError("time_t value out of range"));
+    return std::tm();
+}
+} // namespace fmt
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#endif // FMT_TIME_H_

include/spdlog/fmt/fmt.h

@@ -18,11 +18,16 @@
 #ifndef FMT_USE_WINDOWS_H
 #define FMT_USE_WINDOWS_H 0
 #endif
-#include <spdlog/fmt/bundled/format.h>
-
-#else //external fmtlib
-
-#include <fmt/format.h>
-
+#include "bundled/format.h"
+#if defined(SPDLOG_FMT_PRINTF)
+#include "bundled/printf.h"
 #endif
 
+#else // external fmtlib
+
+#include <fmt/format.h>
+#if defined(SPDLOG_FMT_PRINTF)
+#include <fmt/printf.h>
+#endif
+
+#endif

include/spdlog/fmt/ostr.h

@@ -4,14 +4,15 @@
 //
 
 #pragma once
-
-// include external or bundled copy of fmtlib's ostream support
+//
+// include bundled or external copy of fmtlib's ostream support
 //
 #if !defined(SPDLOG_FMT_EXTERNAL)
-#include <spdlog/fmt/fmt.h>
-#include <spdlog/fmt/bundled/ostream.h>
+#ifndef FMT_HEADER_ONLY
+#define FMT_HEADER_ONLY
+#endif
+#include "bundled/ostream.h"
+#include "fmt.h"
 #else
 #include <fmt/ostream.h>
 #endif
-
-

include/spdlog/formatter.h

@@ -5,41 +5,42 @@
 
 #pragma once
 
-#include <spdlog/details/log_msg.h>
+#include "details/log_msg.h"
 
-#include <vector>
-#include <string>
 #include <memory>
+#include <string>
+#include <vector>
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 class flag_formatter;
 }
 
 class formatter
 {
 public:
-    virtual ~formatter() {}
-    virtual void format(details::log_msg& msg) = 0;
+    virtual ~formatter() = default;
+    virtual void format(details::log_msg &msg) = 0;
 };
 
-class pattern_formatter : public formatter
+class pattern_formatter SPDLOG_FINAL : public formatter
 {
-
 public:
-    explicit pattern_formatter(const std::string& pattern);
-    pattern_formatter(const pattern_formatter&) = delete;
-    pattern_formatter& operator=(const pattern_formatter&) = delete;
-    void format(details::log_msg& msg) override;
+    explicit pattern_formatter(const std::string &pattern, pattern_time_type pattern_time = pattern_time_type::local,
+        std::string eol = spdlog::details::os::default_eol);
+    pattern_formatter(const pattern_formatter &) = delete;
+    pattern_formatter &operator=(const pattern_formatter &) = delete;
+    void format(details::log_msg &msg) override;
+
 private:
+    const std::string _eol;
     const std::string _pattern;
+    const pattern_time_type _pattern_time;
     std::vector<std::unique_ptr<details::flag_formatter>> _formatters;
+    std::tm get_time(details::log_msg &msg);
     void handle_flag(char flag);
-    void compile_pattern(const std::string& pattern);
+    void compile_pattern(const std::string &pattern);
 };
-}
-
-#include <spdlog/details/pattern_formatter_impl.h>
+} // namespace spdlog
 
+#include "details/pattern_formatter_impl.h"

include/spdlog/logger.h

@@ -5,79 +5,148 @@
 
 #pragma once
 
-// Thread safe logger
+// Thread safe logger (except for set_pattern(..), set_formatter(..) and set_error_handler())
 // Has name, log level, vector of std::shared sink pointers and formatter
 // Upon each log write the logger:
 // 1. Checks if its log level is enough to log the message
 // 2. Format the message using the formatter function
 // 3. Pass the formatted message to its sinks to performa the actual logging
 
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/common.h>
+#include "common.h"
+#include "sinks/base_sink.h"
 
-#include <vector>
 #include <memory>
 #include <string>
+#include <vector>
 
-
-namespace spdlog
-{
+namespace spdlog {
 
 class logger
 {
 public:
-    logger(const std::string& logger_name, sink_ptr single_sink);
-    logger(const std::string& name, sinks_init_list);
+    logger(const std::string &name, sink_ptr single_sink);
+    logger(const std::string &name, sinks_init_list sinks);
+
     template<class It>
-    logger(const std::string& name, const It& begin, const It& end);
+    logger(std::string name, const It &begin, const It &end);
 
     virtual ~logger();
-    logger(const logger&) = delete;
-    logger& operator=(const logger&) = delete;
 
+    logger(const logger &) = delete;
+    logger &operator=(const logger &) = delete;
 
-    template <typename... Args> void log(level::level_enum lvl, const char* fmt, const Args&... args);
-    template <typename... Args> void log(level::level_enum lvl, const char* msg);
-    template <typename... Args> void trace(const char* fmt, const Args&... args);
-    template <typename... Args> void debug(const char* fmt, const Args&... args);
-    template <typename... Args> void info(const char* fmt, const Args&... args);
-    template <typename... Args> void warn(const char* fmt, const Args&... args);
-    template <typename... Args> void error(const char* fmt, const Args&... args);
-    template <typename... Args> void critical(const char* fmt, const Args&... args);
+    template<typename... Args>
+    void log(level::level_enum lvl, const char *fmt, const Args &... args);
 
-    template <typename T> void log(level::level_enum lvl, const T&);
-    template <typename T> void trace(const T&);
-    template <typename T> void debug(const T&);
-    template <typename T> void info(const T&);
-    template <typename T> void warn(const T&);
-    template <typename T> void error(const T&);
-    template <typename T> void critical(const T&);
+    template<typename... Args>
+    void log(level::level_enum lvl, const char *msg);
 
+    template<typename Arg1, typename... Args>
+    void trace(const char *fmt, const Arg1 &, const Args &... args);
 
-    bool should_log(level::level_enum) const;
-    void set_level(level::level_enum);
+    template<typename Arg1, typename... Args>
+    void debug(const char *fmt, const Arg1 &, const Args &... args);
+
+    template<typename Arg1, typename... Args>
+    void info(const char *fmt, const Arg1 &, const Args &... args);
+
+    template<typename Arg1, typename... Args>
+    void warn(const char *fmt, const Arg1 &, const Args &... args);
+
+    template<typename Arg1, typename... Args>
+    void error(const char *fmt, const Arg1 &, const Args &... args);
+
+    template<typename Arg1, typename... Args>
+    void critical(const char *fmt, const Arg1 &, const Args &... args);
+
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+    template<typename... Args>
+    void log(level::level_enum lvl, const wchar_t *msg);
+
+    template<typename... Args>
+    void log(level::level_enum lvl, const wchar_t *fmt, const Args &... args);
+
+    template<typename... Args>
+    void trace(const wchar_t *fmt, const Args &... args);
+
+    template<typename... Args>
+    void debug(const wchar_t *fmt, const Args &... args);
+
+    template<typename... Args>
+    void info(const wchar_t *fmt, const Args &... args);
+
+    template<typename... Args>
+    void warn(const wchar_t *fmt, const Args &... args);
+
+    template<typename... Args>
+    void error(const wchar_t *fmt, const Args &... args);
+
+    template<typename... Args>
+    void critical(const wchar_t *fmt, const Args &... args);
+#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
+    template<typename T>
+    void log(level::level_enum lvl, const T &);
+
+    template<typename T>
+    void trace(const T &msg);
+
+    template<typename T>
+    void debug(const T &msg);
+
+    template<typename T>
+    void info(const T &msg);
+
+    template<typename T>
+    void warn(const T &msg);
+
+    template<typename T>
+    void error(const T &msg);
+
+    template<typename T>
+    void critical(const T &msg);
+
+    bool should_log(level::level_enum msg_level) const;
+    void set_level(level::level_enum log_level);
     level::level_enum level() const;
-    const std::string& name() const;
-    void set_pattern(const std::string&);
-    void set_formatter(formatter_ptr);
+    const std::string &name() const;
+    void set_pattern(const std::string &pattern, pattern_time_type pattern_time = pattern_time_type::local);
+    void set_formatter(formatter_ptr msg_formatter);
 
     // automatically call flush() if message level >= log_level
     void flush_on(level::level_enum log_level);
+
     virtual void flush();
 
+    const std::vector<sink_ptr> &sinks() const;
+
+    // error handler
+    virtual void set_error_handler(log_err_handler err_handler);
+    virtual log_err_handler error_handler();
+
 protected:
-    virtual void _sink_it(details::log_msg&);
-    virtual void _set_pattern(const std::string&);
-    virtual void _set_formatter(formatter_ptr);
+    virtual void _sink_it(details::log_msg &msg);
+    virtual void _set_pattern(const std::string &pattern, pattern_time_type pattern_time);
+    virtual void _set_formatter(formatter_ptr msg_formatter);
+
+    // default error handler: print the error to stderr with the max rate of 1 message/minute
+    virtual void _default_err_handler(const std::string &msg);
+
+    // return true if the given message level should trigger a flush
+    bool _should_flush_on(const details::log_msg &msg);
+
+    // increment the message count (only if defined(SPDLOG_ENABLE_MESSAGE_COUNTER))
+    void _incr_msg_counter(details::log_msg &msg);
 
     const std::string _name;
     std::vector<sink_ptr> _sinks;
     formatter_ptr _formatter;
     spdlog::level_t _level;
     spdlog::level_t _flush_level;
+    log_err_handler _err_handler;
+    std::atomic<time_t> _last_err_time;
+    std::atomic<size_t> _msg_counter;
 };
-}
-
-#include <spdlog/details/logger_impl.h>
-
+} // namespace spdlog
 
+#include "details/logger_impl.h"

include/spdlog/sinks/android_sink.h

@@ -7,55 +7,62 @@
 
 #if defined(__ANDROID__)
 
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/details/null_mutex.h>
+#include "../details/os.h"
+#include "sink.h"
 
 #include <android/log.h>
-
+#include <chrono>
 #include <mutex>
 #include <string>
+#include <thread>
+
+#if !defined(SPDLOG_ANDROID_RETRIES)
+#define SPDLOG_ANDROID_RETRIES 2
+#endif
+
+namespace spdlog {
+namespace sinks {
 
-namespace spdlog
-{
-namespace sinks
-{
 /*
-* Android sink (logging using __android_log_write)
-*/
-template<class Mutex>
-class base_android_sink : public base_sink < Mutex >
+ * Android sink (logging using __android_log_write)
+ * __android_log_write is thread-safe. No lock is needed.
+ */
+class android_sink : public sink
 {
 public:
-    explicit base_android_sink(std::string tag="spdlog"): _tag(tag)
+    explicit android_sink(const std::string &tag = "spdlog", bool use_raw_msg = false)
+        : _tag(tag)
+        , _use_raw_msg(use_raw_msg)
     {
     }
 
-    void flush() override
-    {
-    }
-
-protected:
-    void _sink_it(const details::log_msg& msg) override
+    void log(const details::log_msg &msg) override
     {
         const android_LogPriority priority = convert_to_android(msg.level);
-        const int expected_size = msg.formatted.size();
-        const int size = __android_log_write(
-                             priority, _tag.c_str(), msg.formatted.c_str()
-                         );
-        if (size > expected_size)
+        const char *msg_output = (_use_raw_msg ? msg.raw.c_str() : msg.formatted.c_str());
+
+        // See system/core/liblog/logger_write.c for explanation of return value
+        int ret = __android_log_write(priority, _tag.c_str(), msg_output);
+        int retry_count = 0;
+        while ((ret == -11 /*EAGAIN*/) && (retry_count < SPDLOG_ANDROID_RETRIES))
         {
-            // Will write a little bit more than original message
+            details::os::sleep_for_millis(5);
+            ret = __android_log_write(priority, _tag.c_str(), msg_output);
+            retry_count++;
         }
-        else
+
+        if (ret < 0)
         {
-            throw spdlog_ex("Send to Android logcat failed");
+            throw spdlog_ex("__android_log_write() failed", ret);
         }
     }
 
+    void flush() override {}
+
 private:
     static android_LogPriority convert_to_android(spdlog::level::level_enum level)
     {
-        switch(level)
+        switch (level)
         {
         case spdlog::level::trace:
             return ANDROID_LOG_VERBOSE;
@@ -63,30 +70,22 @@ private:
             return ANDROID_LOG_DEBUG;
         case spdlog::level::info:
             return ANDROID_LOG_INFO;
-        case spdlog::level::notice:
-            return ANDROID_LOG_INFO;
         case spdlog::level::warn:
             return ANDROID_LOG_WARN;
         case spdlog::level::err:
             return ANDROID_LOG_ERROR;
         case spdlog::level::critical:
             return ANDROID_LOG_FATAL;
-        case spdlog::level::alert:
-            return ANDROID_LOG_FATAL;
-        case spdlog::level::emerg:
-            return ANDROID_LOG_FATAL;
         default:
-            throw spdlog_ex("Incorrect level value");
+            return ANDROID_LOG_DEFAULT;
         }
     }
 
     std::string _tag;
+    bool _use_raw_msg;
 };
 
-typedef base_android_sink<std::mutex> android_sink_mt;
-typedef base_android_sink<details::null_mutex> android_sink_st;
-
-}
-}
+} // namespace sinks
+} // namespace spdlog
 
 #endif

include/spdlog/sinks/ansicolor_sink.h

@@ -1,116 +1,150 @@
 //
-// Copyright(c) 2016 Kevin M. Godby (a modified version by spdlog).
+// Copyright(c) 2017 spdlog authors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
 #pragma once
 
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/common.h>
+#include "../common.h"
+#include "../details/os.h"
+#include "base_sink.h"
 
 #include <string>
-#include <map>
+#include <unordered_map>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 
 /**
- * @brief The ansi_color_sink is a decorator around another sink and prefixes
- * the output with an ANSI escape sequence color code depending on the severity
+ * This sink prefixes the output with an ANSI escape sequence color code depending on the severity
  * of the message.
+ * If no color terminal detected, omit the escape codes.
  */
-class ansicolor_sink : public sink
+template<class Mutex>
+class ansicolor_sink : public base_sink<Mutex>
 {
 public:
-    ansicolor_sink(sink_ptr wrapped_sink);
-    virtual ~ansicolor_sink();
+    explicit ansicolor_sink(FILE *file)
+        : target_file_(file)
+    {
+        should_do_colors_ = details::os::in_terminal(file) && details::os::is_color_terminal();
+        colors_[level::trace] = white;
+        colors_[level::debug] = cyan;
+        colors_[level::info] = green;
+        colors_[level::warn] = yellow + bold;
+        colors_[level::err] = red + bold;
+        colors_[level::critical] = bold + on_red;
+        colors_[level::off] = reset;
+    }
 
-    ansicolor_sink(const ansicolor_sink& other) = delete;
-    ansicolor_sink& operator=(const ansicolor_sink& other) = delete;
+    ~ansicolor_sink() override
+    {
+        _flush();
+    }
 
-    virtual void log(const details::log_msg& msg) override;
-    virtual void flush() override;
-
-    void set_color(level::level_enum level, const std::string& color);
+    void set_color(level::level_enum color_level, const std::string &color)
+    {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
+        colors_[color_level] = color;
+    }
 
     /// Formatting codes
-    const std::string reset      = "\033[00m";
-    const std::string bold       = "\033[1m";
-    const std::string dark       = "\033[2m";
-    const std::string underline  = "\033[4m";
-    const std::string blink      = "\033[5m";
-    const std::string reverse    = "\033[7m";
-    const std::string concealed  = "\033[8m";
+    const std::string reset = "\033[m";
+    const std::string bold = "\033[1m";
+    const std::string dark = "\033[2m";
+    const std::string underline = "\033[4m";
+    const std::string blink = "\033[5m";
+    const std::string reverse = "\033[7m";
+    const std::string concealed = "\033[8m";
+    const std::string clear_line = "\033[K";
 
     // Foreground colors
-    const std::string grey       = "\033[30m";
-    const std::string red        = "\033[31m";
-    const std::string green      = "\033[32m";
-    const std::string yellow     = "\033[33m";
-    const std::string blue       = "\033[34m";
-    const std::string magenta    = "\033[35m";
-    const std::string cyan       = "\033[36m";
-    const std::string white      = "\033[37m";
+    const std::string black = "\033[30m";
+    const std::string red = "\033[31m";
+    const std::string green = "\033[32m";
+    const std::string yellow = "\033[33m";
+    const std::string blue = "\033[34m";
+    const std::string magenta = "\033[35m";
+    const std::string cyan = "\033[36m";
+    const std::string white = "\033[37m";
 
     /// Background colors
-    const std::string on_grey    = "\033[40m";
-    const std::string on_red     = "\033[41m";
-    const std::string on_green   = "\033[42m";
-    const std::string on_yellow  = "\033[43m";
-    const std::string on_blue    = "\033[44m";
+    const std::string on_black = "\033[40m";
+    const std::string on_red = "\033[41m";
+    const std::string on_green = "\033[42m";
+    const std::string on_yellow = "\033[43m";
+    const std::string on_blue = "\033[44m";
     const std::string on_magenta = "\033[45m";
-    const std::string on_cyan    = "\033[46m";
-    const std::string on_white   = "\033[47m";
-
+    const std::string on_cyan = "\033[46m";
+    const std::string on_white = "\033[47m";
 
 protected:
-    sink_ptr sink_;
-    std::map<level::level_enum, std::string> colors_;
+    void _sink_it(const details::log_msg &msg) override
+    {
+        // Wrap the originally formatted message in color codes.
+        // If color is not supported in the terminal, log as is instead.
+        if (should_do_colors_ && msg.color_range_end > msg.color_range_start)
+        {
+            // before color range
+            _print_range(msg, 0, msg.color_range_start);
+            // in color range
+            _print_ccode(colors_[msg.level]);
+            _print_range(msg, msg.color_range_start, msg.color_range_end);
+            _print_ccode(reset);
+            // after color range
+            _print_range(msg, msg.color_range_end, msg.formatted.size());
+        }
+        else
+        {
+            _print_range(msg, 0, msg.formatted.size());
+        }
+        _flush();
+    }
+
+    void _flush() override
+    {
+        fflush(target_file_);
+    }
+
+private:
+    void _print_ccode(const std::string &color_code)
+    {
+        fwrite(color_code.data(), sizeof(char), color_code.size(), target_file_);
+    }
+    void _print_range(const details::log_msg &msg, size_t start, size_t end)
+    {
+        fwrite(msg.formatted.data() + start, sizeof(char), end - start, target_file_);
+    }
+    FILE *target_file_;
+    bool should_do_colors_;
+    std::unordered_map<level::level_enum, std::string, level::level_hasher> colors_;
 };
 
-inline ansicolor_sink::ansicolor_sink(sink_ptr wrapped_sink) : sink_(wrapped_sink)
+template<class Mutex>
+class ansicolor_stdout_sink : public ansicolor_sink<Mutex>
 {
-    colors_[level::trace]   = cyan;
-    colors_[level::debug]   = cyan;
-    colors_[level::info]    = bold;
-    colors_[level::warn]    = yellow + bold;
-    colors_[level::err]     = red + bold;
-    colors_[level::critical] = bold + on_red;
-    colors_[level::off]      = reset;
-}
+public:
+    ansicolor_stdout_sink()
+        : ansicolor_sink<Mutex>(stdout)
+    {
+    }
+};
 
-inline void ansicolor_sink::log(const details::log_msg& msg)
-{
-    // Wrap the originally formatted message in color codes
-    const std::string& prefix = colors_[msg.level];
-    const std::string& s = msg.formatted.str();
-    const std::string& suffix = reset;
-    details::log_msg m;
-    m.level = msg.level;
-    m.logger_name = msg.logger_name;
-    m.time = msg.time;
-    m.thread_id = msg.thread_id;
-    m.formatted << prefix  << s << suffix;
-    sink_->log(m);
-}
+using ansicolor_stdout_sink_mt = ansicolor_stdout_sink<std::mutex>;
+using ansicolor_stdout_sink_st = ansicolor_stdout_sink<details::null_mutex>;
 
-inline void ansicolor_sink::flush()
+template<class Mutex>
+class ansicolor_stderr_sink : public ansicolor_sink<Mutex>
 {
-    sink_->flush();
-}
+public:
+    ansicolor_stderr_sink()
+        : ansicolor_sink<Mutex>(stderr)
+    {
+    }
+};
 
-inline void ansicolor_sink::set_color(level::level_enum level, const std::string& color)
-{
-    colors_[level] = color;
-}
-
-inline ansicolor_sink::~ansicolor_sink()
-{
-    flush();
-}
+using ansicolor_stderr_sink_mt = ansicolor_stderr_sink<std::mutex>;
+using ansicolor_stderr_sink_st = ansicolor_stderr_sink<details::null_mutex>;
 
 } // namespace sinks
 } // namespace spdlog
-

include/spdlog/sinks/base_sink.h

@@ -5,41 +5,45 @@
 
 #pragma once
 //
-// base sink templated over a mutex (either dummy or realy)
-// concrete implementation should only overrid the _sink_it method.
-// all locking is taken care of here so no locking needed by the implementors..
+// base sink templated over a mutex (either dummy or real)
+// concrete implementation should only override the _sink_it method.
+// all locking is taken care of here so no locking needed by the implementers..
 //
 
-#include <spdlog/sinks/sink.h>
-#include <spdlog/formatter.h>
-#include <spdlog/common.h>
-#include <spdlog/details/log_msg.h>
+#include "../common.h"
+#include "../details/log_msg.h"
+#include "../formatter.h"
+#include "sink.h"
 
 #include <mutex>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 template<class Mutex>
-class base_sink:public sink
+class base_sink : public sink
 {
 public:
-    base_sink():_mutex() {}
-    virtual ~base_sink() = default;
+    base_sink() = default;
 
-    base_sink(const base_sink&) = delete;
-    base_sink& operator=(const base_sink&) = delete;
+    base_sink(const base_sink &) = delete;
+    base_sink &operator=(const base_sink &) = delete;
 
-    void log(const details::log_msg& msg) override
+    void log(const details::log_msg &msg) SPDLOG_FINAL override
     {
         std::lock_guard<Mutex> lock(_mutex);
         _sink_it(msg);
     }
 
+    void flush() SPDLOG_FINAL override
+    {
+        std::lock_guard<Mutex> lock(_mutex);
+        _flush();
+    }
+
 protected:
-    virtual void _sink_it(const details::log_msg& msg) = 0;
+    virtual void _sink_it(const details::log_msg &msg) = 0;
+    virtual void _flush() = 0;
     Mutex _mutex;
 };
-}
-}
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/dist_sink.h

@@ -5,68 +5,73 @@
 
 #pragma once
 
-#include <spdlog/details/log_msg.h>
-#include <spdlog/details/null_mutex.h>
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/sinks/sink.h>
+#include "../details/log_msg.h"
+#include "../details/null_mutex.h"
+#include "base_sink.h"
+#include "sink.h"
 
 #include <algorithm>
 #include <memory>
 #include <mutex>
 #include <vector>
 
-namespace spdlog
-{
-namespace sinks
-{
+// Distribution sink (mux). Stores a vector of sinks which get called when log is called
+
+namespace spdlog {
+namespace sinks {
 template<class Mutex>
-class dist_sink: public base_sink<Mutex>
+class dist_sink : public base_sink<Mutex>
 {
 public:
-    explicit dist_sink() :_sinks() {}
-    dist_sink(const dist_sink&) = delete;
-    dist_sink& operator=(const dist_sink&) = delete;
-    virtual ~dist_sink() = default;
+    explicit dist_sink()
+        : _sinks()
+    {
+    }
+    dist_sink(const dist_sink &) = delete;
+    dist_sink &operator=(const dist_sink &) = delete;
 
 protected:
-    void _sink_it(const details::log_msg& msg) override
-    {
-        for (auto iter = _sinks.begin(); iter != _sinks.end(); iter++)
-            (*iter)->log(msg);
-    }
-
     std::vector<std::shared_ptr<sink>> _sinks;
 
-public:
-    void flush() override
+    void _sink_it(const details::log_msg &msg) override
     {
-        std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
-        for (auto iter = _sinks.begin(); iter != _sinks.end(); iter++)
-            (*iter)->flush();
+        for (auto &sink : _sinks)
+        {
+            if (sink->should_log(msg.level))
+            {
+                sink->log(msg);
+            }
+        }
     }
 
+    void _flush() override
+    {
+        for (auto &sink : _sinks)
+            sink->flush();
+    }
+
+public:
     void add_sink(std::shared_ptr<sink> sink)
     {
         std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
-        if (sink &&
-                _sinks.end() == std::find(_sinks.begin(), _sinks.end(), sink))
-        {
-            _sinks.push_back(sink);
-        }
+        _sinks.push_back(sink);
     }
 
     void remove_sink(std::shared_ptr<sink> sink)
     {
         std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
-        auto pos = std::find(_sinks.begin(), _sinks.end(), sink);
-        if (pos != _sinks.end())
-        {
-            _sinks.erase(pos);
-        }
+        _sinks.erase(std::remove(_sinks.begin(), _sinks.end(), sink), _sinks.end());
+    }
+
+    void remove_all_sinks()
+    {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::_mutex);
+        _sinks.clear();
     }
 };
 
-typedef dist_sink<std::mutex> dist_sink_mt;
-typedef dist_sink<details::null_mutex> dist_sink_st;
-}
-}
+using dist_sink_mt = dist_sink<std::mutex>;
+using dist_sink_st = dist_sink<details::null_mutex>;
+
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/file_sinks.h

@@ -5,81 +5,98 @@
 
 #pragma once
 
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/details/null_mutex.h>
-#include <spdlog/details/file_helper.h>
-#include <spdlog/fmt/fmt.h>
+#include "../details/file_helper.h"
+#include "../details/null_mutex.h"
+#include "../fmt/fmt.h"
+#include "base_sink.h"
 
 #include <algorithm>
+#include <cerrno>
 #include <chrono>
 #include <cstdio>
 #include <ctime>
 #include <mutex>
 #include <string>
-#include <cerrno>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 /*
-* Trivial file sink with single file as target
-*/
+ * Trivial file sink with single file as target
+ */
 template<class Mutex>
-class simple_file_sink : public base_sink < Mutex >
+class simple_file_sink SPDLOG_FINAL : public base_sink<Mutex>
 {
 public:
-    explicit simple_file_sink(const filename_t &filename,
-                              bool force_flush = false) :
-        _file_helper(force_flush)
+    explicit simple_file_sink(const filename_t &filename, bool truncate = false)
+        : _force_flush(false)
     {
-        _file_helper.open(filename);
+        _file_helper.open(filename, truncate);
     }
-    void flush() override
+
+    void set_force_flush(bool force_flush)
     {
-        _file_helper.flush();
+        _force_flush = force_flush;
     }
 
 protected:
-    void _sink_it(const details::log_msg& msg) override
+    void _sink_it(const details::log_msg &msg) override
     {
         _file_helper.write(msg);
-    }
-private:
-    details::file_helper _file_helper;
-};
-
-typedef simple_file_sink<std::mutex> simple_file_sink_mt;
-typedef simple_file_sink<details::null_mutex> simple_file_sink_st;
-
-/*
-* Rotating file sink based on size
-*/
-template<class Mutex>
-class rotating_file_sink : public base_sink < Mutex >
-{
-public:
-    rotating_file_sink(const filename_t &base_filename, const filename_t &extension,
-                       std::size_t max_size, std::size_t max_files,
-                       bool force_flush = false) :
-        _base_filename(base_filename),
-        _extension(extension),
-        _max_size(max_size),
-        _max_files(max_files),
-        _current_size(0),
-        _file_helper(force_flush)
-    {
-        _file_helper.open(calc_filename(_base_filename, 0, _extension));
-        _current_size = _file_helper.size(); //expensive. called only once
+        if (_force_flush)
+        {
+            _file_helper.flush();
+        }
     }
 
-    void flush() override
+    void _flush() override
     {
         _file_helper.flush();
     }
 
+private:
+    details::file_helper _file_helper;
+    bool _force_flush;
+};
+
+using simple_file_sink_mt = simple_file_sink<std::mutex>;
+using simple_file_sink_st = simple_file_sink<details::null_mutex>;
+
+/*
+ * Rotating file sink based on size
+ */
+template<class Mutex>
+class rotating_file_sink SPDLOG_FINAL : public base_sink<Mutex>
+{
+public:
+    rotating_file_sink(filename_t base_filename, std::size_t max_size, std::size_t max_files)
+        : _base_filename(std::move(base_filename))
+        , _max_size(max_size)
+        , _max_files(max_files)
+    {
+        _file_helper.open(calc_filename(_base_filename, 0));
+        _current_size = _file_helper.size(); // expensive. called only once
+    }
+
+    // calc filename according to index and file extension if exists.
+    // e.g. calc_filename("logs/mylog.txt, 3) => "logs/mylog.3.txt".
+    static filename_t calc_filename(const filename_t &filename, std::size_t index)
+    {
+        typename std::conditional<std::is_same<filename_t::value_type, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
+        if (index != 0u)
+        {
+            filename_t basename, ext;
+            std::tie(basename, ext) = details::file_helper::split_by_extenstion(filename);
+            w.write(SPDLOG_FILENAME_T("{}.{}{}"), basename, index, ext);
+        }
+        else
+        {
+            w.write(SPDLOG_FILENAME_T("{}"), filename);
+        }
+        return w.str();
+    }
+
 protected:
-    void _sink_it(const details::log_msg& msg) override
+    void _sink_it(const details::log_msg &msg) override
     {
         _current_size += msg.formatted.size();
         if (_current_size > _max_size)
@@ -90,31 +107,25 @@ protected:
         _file_helper.write(msg);
     }
 
-private:
-    static filename_t calc_filename(const filename_t& filename, std::size_t index, const filename_t& extension)
+    void _flush() override
     {
-        std::conditional<std::is_same<filename_t::value_type, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
-        if (index)
-            w.write(SPDLOG_FILENAME_T("{}.{}.{}"), filename, index, extension);
-        else
-            w.write(SPDLOG_FILENAME_T("{}.{}"), filename, extension);
-        return w.str();
+        _file_helper.flush();
     }
 
+private:
     // Rotate files:
     // log.txt -> log.1.txt
-    // log.1.txt -> log2.txt
-    // log.2.txt -> log3.txt
+    // log.1.txt -> log.2.txt
+    // log.2.txt -> log.3.txt
     // log.3.txt -> delete
-
     void _rotate()
     {
         using details::os::filename_to_str;
         _file_helper.close();
         for (auto i = _max_files; i > 0; --i)
         {
-            filename_t src = calc_filename(_base_filename, i - 1, _extension);
-            filename_t target = calc_filename(_base_filename, i, _extension);
+            filename_t src = calc_filename(_base_filename, i - 1);
+            filename_t target = calc_filename(_base_filename, i);
 
             if (details::file_helper::file_exists(target))
             {
@@ -123,95 +134,96 @@ private:
                     throw spdlog_ex("rotating_file_sink: failed removing " + filename_to_str(target), errno);
                 }
             }
-            if (details::file_helper::file_exists(src) && details::os::rename(src, target))
+            if (details::file_helper::file_exists(src) && details::os::rename(src, target) != 0)
             {
                 throw spdlog_ex("rotating_file_sink: failed renaming " + filename_to_str(src) + " to " + filename_to_str(target), errno);
             }
         }
         _file_helper.reopen(true);
     }
+
     filename_t _base_filename;
-    filename_t _extension;
     std::size_t _max_size;
     std::size_t _max_files;
     std::size_t _current_size;
     details::file_helper _file_helper;
 };
 
-typedef rotating_file_sink<std::mutex> rotating_file_sink_mt;
-typedef rotating_file_sink<details::null_mutex>rotating_file_sink_st;
+using rotating_file_sink_mt = rotating_file_sink<std::mutex>;
+using rotating_file_sink_st = rotating_file_sink<details::null_mutex>;
 
 /*
-* Default generator of daily log file names.
-*/
+ * Default generator of daily log file names.
+ */
 struct default_daily_file_name_calculator
 {
-    //Create filename for the form basename.YYYY-MM-DD_hh-mm.extension
-    static filename_t calc_filename(const filename_t& basename, const filename_t& extension)
+    // Create filename for the form filename.YYYY-MM-DD_hh-mm.ext
+    static filename_t calc_filename(const filename_t &filename)
     {
         std::tm tm = spdlog::details::os::localtime();
+        filename_t basename, ext;
+        std::tie(basename, ext) = details::file_helper::split_by_extenstion(filename);
         std::conditional<std::is_same<filename_t::value_type, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
-        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}.{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, extension);
+        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+            tm.tm_hour, tm.tm_min, ext);
         return w.str();
     }
 };
 
 /*
-* Generator of daily log file names in format basename.YYYY-MM-DD.extension
-*/
+ * Generator of daily log file names in format basename.YYYY-MM-DD.ext
+ */
 struct dateonly_daily_file_name_calculator
 {
-    //Create filename for the form basename.YYYY-MM-DD.extension
-    static filename_t calc_filename(const filename_t& basename, const filename_t& extension)
+    // Create filename for the form basename.YYYY-MM-DD
+    static filename_t calc_filename(const filename_t &filename)
     {
         std::tm tm = spdlog::details::os::localtime();
+        filename_t basename, ext;
+        std::tie(basename, ext) = details::file_helper::split_by_extenstion(filename);
         std::conditional<std::is_same<filename_t::value_type, char>::value, fmt::MemoryWriter, fmt::WMemoryWriter>::type w;
-        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}.{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, extension);
+        w.write(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}{}"), basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, ext);
         return w.str();
     }
 };
 
 /*
-* Rotating file sink based on date. rotates at midnight
-*/
+ * Rotating file sink based on date. rotates at midnight
+ */
 template<class Mutex, class FileNameCalc = default_daily_file_name_calculator>
-class daily_file_sink :public base_sink < Mutex >
+class daily_file_sink SPDLOG_FINAL : public base_sink<Mutex>
 {
 public:
-    //create daily file sink which rotates on given time
-    daily_file_sink(
-        const filename_t& base_filename,
-        const filename_t& extension,
-        int rotation_hour,
-        int rotation_minute,
-        bool force_flush = false) : _base_filename(base_filename),
-        _extension(extension),
-        _rotation_h(rotation_hour),
-        _rotation_m(rotation_minute),
-        _file_helper(force_flush)
+    // create daily file sink which rotates on given time
+    daily_file_sink(filename_t base_filename, int rotation_hour, int rotation_minute)
+        : _base_filename(std::move(base_filename))
+        , _rotation_h(rotation_hour)
+        , _rotation_m(rotation_minute)
     {
         if (rotation_hour < 0 || rotation_hour > 23 || rotation_minute < 0 || rotation_minute > 59)
+        {
             throw spdlog_ex("daily_file_sink: Invalid rotation time in ctor");
+        }
         _rotation_tp = _next_rotation_tp();
-        _file_helper.open(FileNameCalc::calc_filename(_base_filename, _extension));
-    }
-
-    void flush() override
-    {
-        _file_helper.flush();
+        _file_helper.open(FileNameCalc::calc_filename(_base_filename));
     }
 
 protected:
-    void _sink_it(const details::log_msg& msg) override
+    void _sink_it(const details::log_msg &msg) override
     {
         if (std::chrono::system_clock::now() >= _rotation_tp)
         {
-            _file_helper.open(FileNameCalc::calc_filename(_base_filename, _extension));
+            _file_helper.open(FileNameCalc::calc_filename(_base_filename));
             _rotation_tp = _next_rotation_tp();
         }
         _file_helper.write(msg);
     }
 
+    void _flush() override
+    {
+        _file_helper.flush();
+    }
+
 private:
     std::chrono::system_clock::time_point _next_rotation_tp()
     {
@@ -223,20 +235,21 @@ private:
         date.tm_sec = 0;
         auto rotation_time = std::chrono::system_clock::from_time_t(std::mktime(&date));
         if (rotation_time > now)
+        {
             return rotation_time;
-        else
-            return std::chrono::system_clock::time_point(rotation_time + std::chrono::hours(24));
+        }
+        return {rotation_time + std::chrono::hours(24)};
     }
 
     filename_t _base_filename;
-    filename_t _extension;
     int _rotation_h;
     int _rotation_m;
     std::chrono::system_clock::time_point _rotation_tp;
     details::file_helper _file_helper;
 };
 
-typedef daily_file_sink<std::mutex> daily_file_sink_mt;
-typedef daily_file_sink<details::null_mutex> daily_file_sink_st;
-}
-}
+using daily_file_sink_mt = daily_file_sink<std::mutex>;
+using daily_file_sink_st = daily_file_sink<details::null_mutex>;
+
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/msvc_sink.h

@@ -5,46 +5,40 @@
 
 #pragma once
 
-#if defined(_MSC_VER)
+#if defined(_WIN32)
 
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/details/null_mutex.h>
+#include "../details/null_mutex.h"
+#include "base_sink.h"
 
-#include <WinBase.h>
+#include <winbase.h>
 
 #include <mutex>
 #include <string>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 /*
-* MSVC sink (logging using OutputDebugStringA)
-*/
+ * MSVC sink (logging using OutputDebugStringA)
+ */
 template<class Mutex>
-class msvc_sink : public base_sink < Mutex >
+class msvc_sink : public base_sink<Mutex>
 {
 public:
-    explicit msvc_sink()
-    {
-    }
-
-    void flush() override
-    {
-    }
+    explicit msvc_sink() {}
 
 protected:
-    void _sink_it(const details::log_msg& msg) override
+    void _sink_it(const details::log_msg &msg) override
     {
         OutputDebugStringA(msg.formatted.c_str());
     }
+
+    void _flush() override {}
 };
 
-typedef msvc_sink<std::mutex> msvc_sink_mt;
-typedef msvc_sink<details::null_mutex> msvc_sink_st;
+using msvc_sink_mt = msvc_sink<std::mutex>;
+using msvc_sink_st = msvc_sink<details::null_mutex>;
 
-}
-}
+} // namespace sinks
+} // namespace spdlog
 
 #endif

include/spdlog/sinks/null_sink.h

@@ -5,30 +5,25 @@
 
 #pragma once
 
-#include <spdlog/sinks/base_sink.h>
-#include <spdlog/details/null_mutex.h>
+#include "../details/null_mutex.h"
+#include "base_sink.h"
 
 #include <mutex>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 
-template <class Mutex>
-class null_sink : public base_sink < Mutex >
+template<class Mutex>
+class null_sink : public base_sink<Mutex>
 {
 protected:
-    void _sink_it(const details::log_msg&) override
-    {}
-
-    void flush() override
-    {}
+    void _sink_it(const details::log_msg &) override {}
 
+    void _flush() override {}
 };
-typedef null_sink<details::null_mutex> null_sink_st;
-typedef null_sink<std::mutex> null_sink_mt;
 
-}
-}
+using null_sink_mt = null_sink<details::null_mutex>;
+using null_sink_st = null_sink<details::null_mutex>;
 
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/ostream_sink.h

@@ -5,43 +5,45 @@
 
 #pragma once
 
-#include <spdlog/details/null_mutex.h>
-#include <spdlog/sinks/base_sink.h>
+#include "../details/null_mutex.h"
+#include "base_sink.h"
 
-#include <ostream>
 #include <mutex>
+#include <ostream>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 template<class Mutex>
-class ostream_sink: public base_sink<Mutex>
+class ostream_sink : public base_sink<Mutex>
 {
 public:
-    explicit ostream_sink(std::ostream& os, bool force_flush=false) :_ostream(os), _force_flush(force_flush) {}
-    ostream_sink(const ostream_sink&) = delete;
-    ostream_sink& operator=(const ostream_sink&) = delete;
-    virtual ~ostream_sink() = default;
+    explicit ostream_sink(std::ostream &os, bool force_flush = false)
+        : _ostream(os)
+        , _force_flush(force_flush)
+    {
+    }
+    ostream_sink(const ostream_sink &) = delete;
+    ostream_sink &operator=(const ostream_sink &) = delete;
 
 protected:
-    void _sink_it(const details::log_msg& msg) override
+    void _sink_it(const details::log_msg &msg) override
     {
         _ostream.write(msg.formatted.data(), msg.formatted.size());
         if (_force_flush)
             _ostream.flush();
     }
 
-    void flush() override
+    void _flush() override
     {
         _ostream.flush();
     }
 
-    std::ostream& _ostream;
+    std::ostream &_ostream;
     bool _force_flush;
 };
 
-typedef ostream_sink<std::mutex> ostream_sink_mt;
-typedef ostream_sink<details::null_mutex> ostream_sink_st;
-}
-}
+using ostream_sink_mt = ostream_sink<std::mutex>;
+using ostream_sink_st = ostream_sink<details::null_mutex>;
+
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/sink.h

@@ -3,22 +3,42 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 //
 
-
 #pragma once
 
-#include <spdlog/details/log_msg.h>
+#include "../details/log_msg.h"
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 class sink
 {
 public:
-    virtual ~sink() {}
-    virtual void log(const details::log_msg& msg) = 0;
+    virtual ~sink() = default;
+
+    virtual void log(const details::log_msg &msg) = 0;
     virtual void flush() = 0;
+
+    bool should_log(level::level_enum msg_level) const;
+    void set_level(level::level_enum log_level);
+    level::level_enum level() const;
+
+private:
+    level_t _level{level::trace};
 };
-}
+
+inline bool sink::should_log(level::level_enum msg_level) const
+{
+    return msg_level >= _level.load(std::memory_order_relaxed);
 }
 
+inline void sink::set_level(level::level_enum log_level)
+{
+    _level.store(log_level);
+}
+
+inline level::level_enum sink::level() const
+{
+    return static_cast<spdlog::level::level_enum>(_level.load(std::memory_order_relaxed));
+}
+
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/stdout_sinks.h

@@ -5,71 +5,75 @@
 
 #pragma once
 
-#include <spdlog/details/null_mutex.h>
-#include <spdlog/sinks/base_sink.h>
+#include "../details/null_mutex.h"
+#include "base_sink.h"
 
 #include <cstdio>
 #include <memory>
 #include <mutex>
 
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 
-template <class Mutex>
-class stdout_sink : public base_sink<Mutex>
+template<class Mutex>
+class stdout_sink SPDLOG_FINAL : public base_sink<Mutex>
 {
     using MyType = stdout_sink<Mutex>;
+
 public:
-    stdout_sink() {}
+    explicit stdout_sink() = default;
+
     static std::shared_ptr<MyType> instance()
     {
         static std::shared_ptr<MyType> instance = std::make_shared<MyType>();
         return instance;
     }
 
-    void _sink_it(const details::log_msg& msg) override
+protected:
+    void _sink_it(const details::log_msg &msg) override
     {
         fwrite(msg.formatted.data(), sizeof(char), msg.formatted.size(), stdout);
-        flush();
+        _flush();
     }
 
-    void flush() override
+    void _flush() override
     {
         fflush(stdout);
     }
 };
 
-typedef stdout_sink<details::null_mutex> stdout_sink_st;
-typedef stdout_sink<std::mutex> stdout_sink_mt;
+using stdout_sink_mt = stdout_sink<std::mutex>;
+using stdout_sink_st = stdout_sink<details::null_mutex>;
 
-
-template <class Mutex>
-class stderr_sink : public base_sink<Mutex>
+template<class Mutex>
+class stderr_sink SPDLOG_FINAL : public base_sink<Mutex>
 {
     using MyType = stderr_sink<Mutex>;
+
 public:
-    stderr_sink() {}
+    explicit stderr_sink() = default;
+
     static std::shared_ptr<MyType> instance()
     {
         static std::shared_ptr<MyType> instance = std::make_shared<MyType>();
         return instance;
     }
 
-    void _sink_it(const details::log_msg& msg) override
+protected:
+    void _sink_it(const details::log_msg &msg) override
     {
         fwrite(msg.formatted.data(), sizeof(char), msg.formatted.size(), stderr);
-        flush();
+        _flush();
     }
 
-    void flush() override
+    void _flush() override
     {
         fflush(stderr);
     }
 };
 
-typedef stderr_sink<std::mutex> stderr_sink_mt;
-typedef stderr_sink<details::null_mutex> stderr_sink_st;
-}
-}
+using stderr_sink_mt = stderr_sink<std::mutex>;
+using stderr_sink_st = stderr_sink<details::null_mutex>;
+
+} // namespace sinks
+} // namespace spdlog

include/spdlog/sinks/syslog_sink.h

@@ -5,21 +5,19 @@
 
 #pragma once
 
-#if defined(__linux__) || defined(__APPLE__)
+#include "../common.h"
 
-#include <spdlog/sinks/sink.h>
-#include <spdlog/common.h>
-#include <spdlog/details/log_msg.h>
+#ifdef SPDLOG_ENABLE_SYSLOG
+
+#include "../details/log_msg.h"
+#include "sink.h"
 
 #include <array>
 #include <string>
 #include <syslog.h>
 
-
-namespace spdlog
-{
-namespace sinks
-{
+namespace spdlog {
+namespace sinks {
 /**
  * Sink that write to syslog using the `syscall()` library call.
  *
@@ -29,41 +27,39 @@ class syslog_sink : public sink
 {
 public:
     //
-    syslog_sink(const std::string& ident = "", int syslog_option=0, int syslog_facility=LOG_USER):
-        _ident(ident)
+    syslog_sink(const std::string &ident = "", int syslog_option = 0, int syslog_facility = LOG_USER)
+        : _ident(ident)
     {
-        _priorities[static_cast<int>(level::trace)] = LOG_DEBUG;
-        _priorities[static_cast<int>(level::debug)] = LOG_DEBUG;
-        _priorities[static_cast<int>(level::info)] = LOG_INFO;
-        _priorities[static_cast<int>(level::warn)] = LOG_WARNING;
-        _priorities[static_cast<int>(level::err)] = LOG_ERR;
-        _priorities[static_cast<int>(level::critical)] = LOG_CRIT;
-        _priorities[static_cast<int>(level::off)] = LOG_INFO;
+        _priorities[static_cast<size_t>(level::trace)] = LOG_DEBUG;
+        _priorities[static_cast<size_t>(level::debug)] = LOG_DEBUG;
+        _priorities[static_cast<size_t>(level::info)] = LOG_INFO;
+        _priorities[static_cast<size_t>(level::warn)] = LOG_WARNING;
+        _priorities[static_cast<size_t>(level::err)] = LOG_ERR;
+        _priorities[static_cast<size_t>(level::critical)] = LOG_CRIT;
+        _priorities[static_cast<size_t>(level::off)] = LOG_INFO;
 
-        //set ident to be program name if empty
-        ::openlog(_ident.empty()? nullptr:_ident.c_str(), syslog_option, syslog_facility);
+        // set ident to be program name if empty
+        ::openlog(_ident.empty() ? nullptr : _ident.c_str(), syslog_option, syslog_facility);
     }
-    ~syslog_sink()
+
+    ~syslog_sink() override
     {
         ::closelog();
     }
 
-    syslog_sink(const syslog_sink&) = delete;
-    syslog_sink& operator=(const syslog_sink&) = delete;
+    syslog_sink(const syslog_sink &) = delete;
+    syslog_sink &operator=(const syslog_sink &) = delete;
 
     void log(const details::log_msg &msg) override
     {
         ::syslog(syslog_prio_from_level(msg), "%s", msg.raw.str().c_str());
     }
 
-    void flush() override
-    {
-    }
-
+    void flush() override {}
 
 private:
     std::array<int, 7> _priorities;
-    //must store the ident because the man says openlog might use the pointer as is and not a string copy
+    // must store the ident because the man says openlog might use the pointer as is and not a string copy
     const std::string _ident;
 
     //
@@ -71,10 +67,10 @@ private:
     //
     int syslog_prio_from_level(const details::log_msg &msg) const
     {
-        return _priorities[static_cast<int>(msg.level)];
+        return _priorities[static_cast<size_t>(msg.level)];
     }
 };
-}
-}
+} // namespace sinks
+} // namespace spdlog
 
 #endif