Update version.h

remove constexpr on level_string_views to fix compilation on C++17 fr…

.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: false
+  SplitEmptyRecord: false
+  SplitEmptyNamespace: false
+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:    false
+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
+...
+

.clang-tidy

@@ -0,0 +1,54 @@
+Checks: 'cppcoreguidelines-*,
+performance-*,
+modernize-*,
+google-*,
+misc-*,
+cert-*,
+readability-*,
+clang-analyzer-*,
+-performance-unnecessary-value-param,
+-modernize-use-trailing-return-type,
+-google-runtime-references,
+-misc-non-private-member-variables-in-classes,
+-readability-braces-around-statements,
+-google-readability-braces-around-statements,
+-cppcoreguidelines-avoid-magic-numbers,
+-readability-magic-numbers,
+-readability-magic-numbers,
+-cppcoreguidelines-pro-type-vararg,
+-cppcoreguidelines-pro-bounds-pointer-arithmetic,
+-cppcoreguidelines-avoid-c-arrays,
+-modernize-avoid-c-arrays,
+-cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+-readability-named-parameter,
+-cert-env33-c
+'
+
+
+WarningsAsErrors: ''
+HeaderFilterRegex: '*spdlog/[^f].*'
+AnalyzeTemporaryDtors: false
+FormatStyle:     none
+
+CheckOptions:    
+  - key:             google-readability-braces-around-statements.ShortStatementLines
+    value:           '1'
+  - key:             google-readability-function-size.StatementThreshold
+    value:           '800'
+  - key:             google-readability-namespace-comments.ShortNamespaceLines
+    value:           '10'
+  - key:             google-readability-namespace-comments.SpacesBeforeComments
+    value:           '2'
+  - key:             modernize-loop-convert.MaxCopySize
+    value:           '16'
+  - key:             modernize-loop-convert.MinConfidence
+    value:           reasonable
+  - key:             modernize-loop-convert.NamingStyle
+    value:           CamelCase
+  - key:             modernize-pass-by-value.IncludeStyle
+    value:           llvm
+  - key:             modernize-replace-auto-ptr.IncludeStyle
+    value:           llvm
+  - key:             modernize-use-nullptr.NullMacros
+    value:           'NULL'
+

.gitattributes

@@ -0,0 +1 @@
+* text=false

.gitignore

@@ -1,4 +1,5 @@
 # Auto generated files
+build/*
 *.slo
 *.lo
 *.o
@@ -33,6 +34,9 @@
 # Codelite
 .codelite
 
+# KDevelop
+*.kdev4
+
 # .orig files
 *.orig
 
@@ -45,6 +49,7 @@ example/*
 !example/example.sln
 !example/example.vcxproj
 !example/CMakeLists.txt
+!example/meson.build
 !example/multisink.cpp
 !example/jni
 
@@ -61,4 +66,18 @@ install_manifest.txt
 /tests/tests.VC.VC.opendb
 /tests/tests.VC.db
 /tests/tests
-/tests/logs/file_helper_test.txt
+/tests/logs/*
+
+# idea
+.idea/
+cmake-build-*/
+*.db
+*.ipch
+*.filters
+*.db-wal
+*.opendb
+*.db-shm
+*.vcxproj
+*.tcl
+*.user
+*.sln

.travis.yml

@@ -1,90 +1,112 @@
-# Adapted from various sources, including:
-# - Louis Dionne's Hana: https://github.com/ldionne/hana
-# - Paul Fultz II's FIT: https://github.com/pfultz2/Fit
-# - Eric Niebler's range-v3: https://github.com/ericniebler/range-v3
-language: cpp
-
-# Test matrix:
-# - Build matrix per compiler: C++11/C++14 + Debug/Release
-# - Optionally: AddressSanitizer (ASAN)
-# - Valgrind: all release builds are also tested with valgrind
-# - clang 3.4, 3.5, 3.6, trunk
-#   - Note: 3.4 and trunk are tested with/without ASAN,
-#     the rest is only tested with ASAN=On.
-# - gcc 4.9, 5.0
-#
-matrix:
-  include:
-   
-# Test gcc-4.8: C++11, Build=Debug/Release, ASAN=Off
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11 ASAN=Off LIBCXX=Off
-      os: linux
-      addons: &gcc48
-        apt:
-          packages:
-            - g++-4.8
-            - valgrind
-          sources:
-            - ubuntu-toolchain-r-test
-
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11 ASAN=Off LIBCXX=Off
-      os: linux
-      addons: *gcc48
-      
-    # Test gcc-4.9: C++11, Build=Debug/Release, ASAN=Off
-    - env: GCC_VERSION=4.9 BUILD_TYPE=Debug CPP=11 ASAN=Off LIBCXX=Off
-      os: linux
-      addons: &gcc49
-        apt:
-          packages:
-            - g++-4.9
-            - valgrind
-          sources:
-            - ubuntu-toolchain-r-test
-
-    - env: GCC_VERSION=4.9 BUILD_TYPE=Release CPP=11 ASAN=Off LIBCXX=Off
-      os: linux
-      addons: *gcc49
-
-# Install dependencies
-before_install:
-  - export CHECKOUT_PATH=`pwd`;
-  - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
-  - if [ -n "$CLANG_VERSION" ]; then export CXX="clang++-${CLANG_VERSION}" CC="clang-${CLANG_VERSION}"; fi
-  - if [ "$CLANG_VERSION" == "3.4" ]; then export CXX="/usr/local/clang-3.4/bin/clang++" CC="/usr/local/clang-3.4/bin/clang"; fi
-  - which $CXX
-  - which $CC
-  - which valgrind
-  - if [ -n "$CLANG_VERSION" ]; then sudo CXX=$CXX CC=$CC ./tests/install_libcxx.sh; fi
-
-install:
-  - cd $CHECKOUT_PATH
-
-  # Workaround for valgrind bug: https://bugs.kde.org/show_bug.cgi?id=326469.
-  # It is fixed in valgrind 3.10 so this won't be necessary if someone
-  # replaces the current valgrind (3.7) with valgrind-3.10
-  - sed -i 's/march=native/msse4.2/' example/Makefile
-
-  - if [ ! -d build ]; then mkdir build; fi
-  - export CXX_FLAGS="-I${CHECKOUT_PATH}/include"
-  - export CXX_LINKER_FLAGS=""
-  - if [ -z "$BUILD_TYPE" ]; then export BUILD_TYPE=Release; fi
-  - if [ "$ASAN" == "On"]; then export CXX_FLAGS="${CXX_FLAGS} -fsanitize=address,undefined,integer -fno-omit-frame-pointer -fno-sanitize=unsigned-integer-overflow"; fi
-  - if [ -n "$CLANG_VERSION" ]; then CXX_FLAGS="${CXX_FLAGS} -D__extern_always_inline=inline"; fi
-  - if [ "$LIBCXX" == "On" ]; then CXX_FLAGS="${CXX_FLAGS} -stdlib=libc++ -I/usr/include/c++/v1/"; fi
-  - if [ "$LIBCXX" == "On" ]; then CXX_LINKER_FLAGS="${CXX_FLAGS} -L/usr/lib/ -lc++"; fi
-  - CXX_FLAGS="${CXX_FLAGS} -std=c++${CPP}"
-
-  # Build examples
-  - cd example
-  - if [ "$BUILD_TYPE" == "Release" ]; then make rebuild CXXFLAGS="${CXX_FLAGS} ${CXX_LINKER_FLAGS}" VERBOSE=1; export BIN=example; fi
-  - if [ "$BUILD_TYPE" == "Debug" ]; then make rebuild debug CXXFLAGS="${CXX_FLAGS} ${CXX_LINKER_FLAGS}" VERBOSE=1; export BIN=example-debug; fi
-  
-
-script:
-  - ./"${BIN}"
-  - valgrind --trace-children=yes --leak-check=full ./"${BIN}"
-  - cd $CHECKOUT_PATH/tests; make rebuild; ./tests
-
-notifications:
-  email: false
+# Adapted from various sources, including:
+# - Louis Dionne's Hana: https://github.com/ldionne/hana
+# - Paul Fultz II's FIT: https://github.com/pfultz2/Fit
+# - Eric Niebler's range-v3: https://github.com/ericniebler/range-v3
+sudo: required
+language: cpp
+
+# gcc 4.8
+addons: &gcc48
+  apt:
+    packages:
+      - g++-4.8
+    sources:
+      - ubuntu-toolchain-r-test
+
+# gcc 7.0
+addons: &gcc7
+  apt:
+    packages:
+      - g++-7
+    sources:
+      - ubuntu-toolchain-r-test
+
+# Clang 3.5
+addons: &clang35
+  apt:
+    packages:
+      - clang-3.5
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-precise-3.5
+      
+
+addons: &clang10
+  apt:
+    packages:
+      - clang-10
+      - lldb-10
+      - lld-10
+    sources:
+      - sourceline: "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main"
+        key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
+
+
+matrix:
+  include:
+    # Test gcc-4.8: C++11, Build=Debug/Release
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11
+      os: linux
+      addons: *gcc48
+
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *gcc48
+
+    - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *gcc7
+
+    # Test clang-3.5: C++11, Build=Debug/Release
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Debug CPP=11
+      os: linux
+      addons: *clang35
+
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *clang35
+
+      # osx
+    - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
+      os: osx
+
+    # Test clang-10.0: C++11, Build=Debug/Release
+    - env: CLANG_VERSION=10 BUILD_TYPE=Debug CPP=11
+      os: linux
+      dist: bionic
+      addons: *clang10
+
+    - env: CLANG_VERSION=10 BUILD_TYPE=Release CPP=11 ASAN=On
+      os: linux
+      dist: bionic
+      addons: *clang10
+
+
+before_script:
+  - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
+  - if [ -n "$CLANG_VERSION" ]; then export CXX="clang++-${CLANG_VERSION}" CC="clang-${CLANG_VERSION}"; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export CXX="clang++" CC="clang"; fi
+  - which $CXX
+  - which $CC
+  - $CXX --version
+  - cmake --version
+
+script:
+  - cd ${TRAVIS_BUILD_DIR}
+  - mkdir -p build && cd build
+  - |
+    cmake .. \
+      --warn-uninitialized \
+      -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+      -DCMAKE_CXX_STANDARD=$CPP \
+      -DSPDLOG_BUILD_EXAMPLE=ON \
+      -DSPDLOG_BUILD_EXAMPLE_HO=ON \
+      -DSPDLOG_BUILD_WARNINGS=ON \
+      -DSPDLOG_BUILD_BENCH=OFF \
+      -DSPDLOG_BUILD_TESTS=ON \
+      -DSPDLOG_BUILD_TESTS_HO=OFF \
+      -DSPDLOG_SANITIZE_ADDRESS=$ASAN 
+      
+  - make VERBOSE=1 -j2
+  - ctest -j2 --output-on-failure
+  

CMakeLists.txt

@@ -1,80 +1,308 @@
-#
-# 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) 2019 spdlog authors Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+cmake_minimum_required(VERSION 3.10)
+
+# ---------------------------------------------------------------------------------------
+# Start spdlog project
+# ---------------------------------------------------------------------------------------
+include(cmake/utils.cmake)
+include(cmake/ide.cmake)
+
+spdlog_extract_version()
+
+project(spdlog VERSION ${SPDLOG_VERSION} LANGUAGES CXX)
+message(STATUS "Build spdlog: ${SPDLOG_VERSION}")
+
+include(GNUInstallDirs)
+
+# ---------------------------------------------------------------------------------------
+# Set default build to release
+# ---------------------------------------------------------------------------------------
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose Release or Debug" FORCE)
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Compiler config
+# ---------------------------------------------------------------------------------------
+if(NOT CMAKE_CXX_STANDARD)
+    set(CMAKE_CXX_STANDARD 11)
+    set(CMAKE_CXX_STANDARD_REQUIRED ON)
+endif()
+
+# make sure __cplusplus is defined when using msvc
+if(MSVC)
+    string(APPEND CMAKE_CXX_FLAGS " /Zc:__cplusplus")
+endif()
+
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+if(CMAKE_SYSTEM_NAME MATCHES "CYGWIN" OR CMAKE_SYSTEM_NAME MATCHES "MSYS")
+    set(CMAKE_CXX_EXTENSIONS ON)
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Set SPDLOG_MASTER_PROJECT to ON if we are building spdlog
+# ---------------------------------------------------------------------------------------
+# Check if spdlog is being used directly or via add_subdirectory, but allow overriding
+if(NOT DEFINED SPDLOG_MASTER_PROJECT)
+    if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+        set(SPDLOG_MASTER_PROJECT ON)
+    else()
+        set(SPDLOG_MASTER_PROJECT OFF)
+    endif()
+endif()
+
+option(SPDLOG_BUILD_ALL "Build all artifacts" OFF)
+
+# build shared option
+option(SPDLOG_BUILD_SHARED "Build shared library" OFF)
+
+# precompiled headers option
+option(SPDLOG_ENABLE_PCH "Build static or shared library using precompiled header to speed up compilation time" OFF)
+
+# example options
+option(SPDLOG_BUILD_EXAMPLE "Build example" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_EXAMPLE_HO "Build header only example" OFF)
+
+# testing options
+option(SPDLOG_BUILD_TESTS "Build tests" OFF)
+option(SPDLOG_BUILD_TESTS_HO "Build tests using the header only version" OFF)
+
+# bench options
+option(SPDLOG_BUILD_BENCH "Build benchmarks (Requires https://github.com/google/benchmark.git to be installed)" OFF)
+
+# sanitizer options
+option(SPDLOG_SANITIZE_ADDRESS "Enable address sanitizer in tests" OFF)
+
+# warning options
+option(SPDLOG_BUILD_WARNINGS "Enable compiler warnings" OFF)
+
+# install options
+option(SPDLOG_INSTALL "Generate the install target" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" OFF)
+option(SPDLOG_FMT_EXTERNAL_HO "Use external fmt header-only library instead of bundled" OFF)
+option(SPDLOG_NO_EXCEPTIONS "Compile with -fno-exceptions. Call abort() on any spdlog exceptions" OFF)
+
+if(SPDLOG_FMT_EXTERNAL AND SPDLOG_FMT_EXTERNAL_HO)
+    message(FATAL_ERROR "SPDLOG_FMT_EXTERNAL and SPDLOG_FMT_EXTERNAL_HO are mutually exclusive")
+endif()
+
+# misc tweakme options
+if(WIN32)
+    option(SPDLOG_WCHAR_SUPPORT "Support wchar api" OFF)
+    option(SPDLOG_WCHAR_FILENAMES "Support wchar filenames" OFF)
+endif()
+if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
+    option(SPDLOG_CLOCK_COARSE
+           "Use the much faster (but much less accurate) CLOCK_REALTIME_COARSE instead of the regular clock," OFF)
+endif()
+
+option(SPDLOG_PREVENT_CHILD_FD "Prevent from child processes to inherit log file descriptors" OFF)
+option(SPDLOG_NO_THREAD_ID "prevent spdlog from querying the thread id on each log call if thread id is not needed" OFF)
+option(SPDLOG_NO_TLS "prevent spdlog from using thread local storage" OFF)
+option(
+    SPDLOG_NO_ATOMIC_LEVELS
+    "prevent spdlog from using of std::atomic log levels (use only if your code never modifies log levels concurrently"
+    OFF)
+option(SPDLOG_DISABLE_DEFAULT_LOGGER "Disable default logger creation" OFF)
+
+# clang-tidy
+if(${CMAKE_VERSION} VERSION_GREATER "3.5")
+    option(SPDLOG_TIDY "run clang-tidy" OFF)
+endif()
+
+if(SPDLOG_TIDY)
+    set(CMAKE_CXX_CLANG_TIDY "clang-tidy")
+    set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+    message(STATUS "Enabled clang-tidy")
+endif()
+
+find_package(Threads REQUIRED)
+message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+# ---------------------------------------------------------------------------------------
+# Static/Shared library (shared not supported in windows yet)
+# ---------------------------------------------------------------------------------------
+set(SPDLOG_SRCS src/spdlog.cpp src/stdout_sinks.cpp src/color_sinks.cpp src/file_sinks.cpp src/async.cpp src/cfg.cpp)
+
+if(NOT SPDLOG_FMT_EXTERNAL AND NOT SPDLOG_FMT_EXTERNAL_HO)
+    list(APPEND SPDLOG_SRCS src/fmt.cpp)
+endif()
+
+if(SPDLOG_BUILD_SHARED OR BUILD_SHARED_LIBS)
+    if(WIN32)
+        configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/version.rc.in ${CMAKE_CURRENT_BINARY_DIR}/version.rc @ONLY)
+        list(APPEND SPDLOG_SRCS ${CMAKE_CURRENT_BINARY_DIR}/version.rc)
+    endif()
+    add_library(spdlog SHARED ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
+    target_compile_definitions(spdlog PUBLIC SPDLOG_SHARED_LIB)
+    if(MSVC)
+        target_compile_options(spdlog PUBLIC 
+            $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<NOT:$<COMPILE_LANGUAGE:CUDA>>>:/wd4251 /wd4275>)
+    endif()
+    if(NOT SPDLOG_FMT_EXTERNAL AND NOT SPDLOG_FMT_EXTERNAL_HO)
+        target_compile_definitions(spdlog PRIVATE FMT_EXPORT PUBLIC FMT_SHARED)
+    endif()
+else()
+    add_library(spdlog STATIC ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
+endif()
+
+add_library(spdlog::spdlog ALIAS spdlog)
+
+target_compile_definitions(spdlog PUBLIC SPDLOG_COMPILED_LIB)
+target_include_directories(spdlog PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+                                         "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
+target_link_libraries(spdlog PUBLIC Threads::Threads)
+spdlog_enable_warnings(spdlog)
+
+set_target_properties(spdlog PROPERTIES VERSION ${SPDLOG_VERSION} SOVERSION ${SPDLOG_VERSION_MAJOR})
+set_target_properties(spdlog PROPERTIES DEBUG_POSTFIX d)
+
+if(COMMAND target_precompile_headers AND SPDLOG_ENABLE_PCH)
+    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/pch.h.in ${PROJECT_BINARY_DIR}/spdlog_pch.h @ONLY)
+    target_precompile_headers(spdlog PRIVATE ${PROJECT_BINARY_DIR}/spdlog_pch.h)
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Header only version
+# ---------------------------------------------------------------------------------------
+add_library(spdlog_header_only INTERFACE)
+add_library(spdlog::spdlog_header_only ALIAS spdlog_header_only)
+
+target_include_directories(spdlog_header_only INTERFACE "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+                                                        "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")
+target_link_libraries(spdlog_header_only INTERFACE Threads::Threads)
+
+# ---------------------------------------------------------------------------------------
+# Use fmt package if using external fmt
+# ---------------------------------------------------------------------------------------
+if(SPDLOG_FMT_EXTERNAL OR SPDLOG_FMT_EXTERNAL_HO)
+    if(NOT TARGET fmt::fmt)
+        find_package(fmt CONFIG REQUIRED)
+    endif()
+    target_compile_definitions(spdlog PUBLIC SPDLOG_FMT_EXTERNAL)
+    target_compile_definitions(spdlog_header_only INTERFACE SPDLOG_FMT_EXTERNAL)
+
+    # use external fmt-header-nly
+    if(SPDLOG_FMT_EXTERNAL_HO)
+        target_link_libraries(spdlog PUBLIC fmt::fmt-header-only)
+        target_link_libraries(spdlog_header_only INTERFACE fmt::fmt-header-only)
+    else() # use external compile fmt
+        target_link_libraries(spdlog PUBLIC fmt::fmt)
+        target_link_libraries(spdlog_header_only INTERFACE fmt::fmt)
+    endif()
+
+    set(PKG_CONFIG_REQUIRES fmt) # add dependency to pkg-config
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Add required libraries for Android CMake build
+# ---------------------------------------------------------------------------------------
+if (ANDROID)
+    target_link_libraries(spdlog PUBLIC log)
+    target_link_libraries(spdlog_header_only INTERFACE log)
+endif ()
+
+# ---------------------------------------------------------------------------------------
+# Misc definitions according to tweak options
+# ---------------------------------------------------------------------------------------
+set(SPDLOG_WCHAR_TO_UTF8_SUPPORT ${SPDLOG_WCHAR_SUPPORT})
+foreach(
+    SPDLOG_OPTION
+    SPDLOG_WCHAR_TO_UTF8_SUPPORT
+    SPDLOG_WCHAR_FILENAMES
+    SPDLOG_NO_EXCEPTIONS
+    SPDLOG_CLOCK_COARSE
+    SPDLOG_PREVENT_CHILD_FD
+    SPDLOG_NO_THREAD_ID
+    SPDLOG_NO_TLS
+    SPDLOG_NO_ATOMIC_LEVELS
+    SPDLOG_DISABLE_DEFAULT_LOGGER)
+    if(${SPDLOG_OPTION})
+        target_compile_definitions(spdlog PUBLIC ${SPDLOG_OPTION})
+        target_compile_definitions(spdlog_header_only INTERFACE ${SPDLOG_OPTION})
+    endif()
+endforeach()
+
+if(SPDLOG_NO_EXCEPTIONS AND NOT MSVC)
+    target_compile_options(spdlog PRIVATE -fno-exceptions)
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Build binaries
+# ---------------------------------------------------------------------------------------
+if(SPDLOG_BUILD_EXAMPLE OR SPDLOG_BUILD_EXAMPLE_HO OR SPDLOG_BUILD_ALL)
+    message(STATUS "Generating example(s)")
+    add_subdirectory(example)
+    spdlog_enable_warnings(example)
+    if(SPDLOG_BUILD_EXAMPLE_HO)
+        spdlog_enable_warnings(example_header_only)
+    endif()
+endif()
+
+if(SPDLOG_BUILD_TESTS OR SPDLOG_BUILD_TESTS_HO OR SPDLOG_BUILD_ALL)
+    message(STATUS "Generating tests")
+    enable_testing()
+    add_subdirectory(tests)
+endif()
+
+if(SPDLOG_BUILD_BENCH OR SPDLOG_BUILD_ALL)
+    message(STATUS "Generating benchmarks")
+    add_subdirectory(bench)
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Install
+# ---------------------------------------------------------------------------------------
+if(SPDLOG_INSTALL)
+    message(STATUS "Generating install")
+    set(project_config_in "${CMAKE_CURRENT_LIST_DIR}/cmake/spdlogConfig.cmake.in")
+    set(project_config_out "${CMAKE_CURRENT_BINARY_DIR}/spdlogConfig.cmake")
+    set(config_targets_file "spdlogConfigTargets.cmake")
+    set(version_config_file "${CMAKE_CURRENT_BINARY_DIR}/spdlogConfigVersion.cmake")
+    set(export_dest_dir "${CMAKE_INSTALL_LIBDIR}/cmake/spdlog")
+    set(pkgconfig_install_dir "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+    set(pkg_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc")
+
+    # ---------------------------------------------------------------------------------------
+    # Include files
+    # ---------------------------------------------------------------------------------------
+    install(DIRECTORY include/ DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}" PATTERN "fmt/bundled" EXCLUDE)
+    install(
+        TARGETS spdlog spdlog_header_only
+        EXPORT spdlog
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
+    if(NOT SPDLOG_FMT_EXTERNAL AND NOT SPDLOG_FMT_EXTERNAL_HO)
+        install(DIRECTORY include/${PROJECT_NAME}/fmt/bundled/
+                DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}/fmt/bundled/")
+    endif()
+
+    # ---------------------------------------------------------------------------------------
+    # Install pkg-config file
+    # ---------------------------------------------------------------------------------------
+    get_target_property(PKG_CONFIG_DEFINES spdlog INTERFACE_COMPILE_DEFINITIONS)
+    string(REPLACE ";" " -D" PKG_CONFIG_DEFINES "${PKG_CONFIG_DEFINES}")
+    string(CONCAT PKG_CONFIG_DEFINES "-D" "${PKG_CONFIG_DEFINES}")
+    configure_file("cmake/${PROJECT_NAME}.pc.in" "${pkg_config}" @ONLY)
+    install(FILES "${pkg_config}" DESTINATION "${pkgconfig_install_dir}")
+
+    # ---------------------------------------------------------------------------------------
+    # Install CMake config files
+    # ---------------------------------------------------------------------------------------
+    install(EXPORT spdlog DESTINATION ${export_dest_dir} NAMESPACE spdlog:: FILE ${config_targets_file})
+
+    include(CMakePackageConfigHelpers)
+    configure_file("${project_config_in}" "${project_config_out}" @ONLY)
+
+    write_basic_package_version_file("${version_config_file}" COMPATIBILITY SameMajorVersion)
+    install(FILES "${project_config_out}" "${version_config_file}" DESTINATION "${export_dest_dir}")
+
+    # ---------------------------------------------------------------------------------------
+    # Support creation of installable packages
+    # ---------------------------------------------------------------------------------------
+    include(cmake/spdlogCPack.cmake)
+endif()
+

INSTALL

@@ -1,13 +1,24 @@
-spdlog is header only library.
-Just copy the files to your build tree and use a C++11 compiler
+Header only version:
+==================================================================
+Just copy the files to your build tree and use a C++11 compiler.
+Or use CMake:
+  add_executable(example_header_only example.cpp)
+  target_link_libraries(example_header_only spdlog::spdlog_header_only)
+
+
+Compiled library version:
+==================================================================
+CMake:
+  add_executable(example example.cpp)
+  target_link_libraries(example spdlog::spdlog)
+
+Or copy src/spdlog.cpp to your build tree and pass the -DSPDLOG_COMPILED_LIB to the compiler.
 
 Tested on:
 gcc 4.8.1 and above
 clang 3.5
 Visual Studio 2013
 
-gcc 4.8 flags: --std==c++11 -pthread -O3 -flto -Wl,--no-as-needed
-gcc 4.9 flags: --std=c++11 -pthread -O3 -flto
 
 
-see the makefile in the example folder
+

LICENSE

@@ -20,3 +20,7 @@ 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.
 
+-- NOTE: Third party dependency used by this software --
+This software depends on the fmt lib (MIT License),
+and users must comply to its license: https://github.com/fmtlib/fmt/blob/master/LICENSE.rst
+

README.md

@@ -1,23 +1,45 @@
 # spdlog
 
-Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog)
+Very fast, header-only/compiled, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=v1.x)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog) [![Release](https://img.shields.io/github/release/gabime/spdlog.svg)](https://github.com/gabime/spdlog/releases/latest)
 
+## Install 
+#### Header only version
+Copy the source [folder](https://github.com/gabime/spdlog/tree/v1.x/include/spdlog) to your build tree and use a C++11 compiler.
 
-## 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
+#### Static lib version (recommended - much faster compile times)
+```console
+$ git clone https://github.com/gabime/spdlog.git
+$ cd spdlog && mkdir build && cd build
+$ cmake .. && make -j
+```
+      
+   see example [CMakeLists.txt](https://github.com/gabime/spdlog/blob/v1.x/example/CMakeLists.txt) on how to use.
 
 ## Platforms
- * Linux (gcc 4.8.1+, clang 3.5+)
- * Windows (visual studio 2013+, cygwin/mingw with g++ 4.9.1+)
- * Mac OSX (clang 3.5+)
- * Solaris (gcc 5.2.0+)
+ * Linux, FreeBSD, OpenBSD, Solaris, AIX
+ * Windows (msvc 2013+, cygwin)
+ * macOS (clang 3.5+)
  * Android
 
-##Features
-* Very fast - performance is the primary goal (see [benchmarks](#benchmarks) below).
-* 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.
+## Package managers:
+* Homebrew: `brew install spdlog`
+* MacPorts: `sudo port install spdlog`
+* FreeBSD:  `cd /usr/ports/devel/spdlog/ && make install clean`
+* Fedora: `dnf install spdlog`
+* Gentoo: `emerge dev-libs/spdlog`
+* Arch Linux: `pacman -S spdlog`
+* vcpkg: `vcpkg install spdlog`
+* conan: `spdlog/[>=1.4.1]`
+* conda: `conda install -c conda-forge spdlog`
+* build2: ```depends: spdlog ^1.8.2```
+
+
+
+## Features
+* Very fast (see [benchmarks](#benchmarks) below).
+* Headers only or compiled
+* Feature rich formatting, using the excellent [fmt](https://github.com/fmtlib/fmt) library.
+* Asynchronous mode (optional)
 * [Custom](https://github.com/gabime/spdlog/wiki/3.-Custom-formatting) formatting.
 * Multi/Single threaded loggers.
 * Various log targets:
@@ -25,176 +47,390 @@ Just copy the source [folder](https://github.com/gabime/spdlog/tree/master/inclu
     * Daily log files.
     * Console logging (colors supported).
     * syslog.
+    * Windows event log.
+    * 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.
+* Log filtering - log levels can be modified in runtime as well as in compile time.
+* Support for loading log levels from argv or from environment var.
+* [Backtrace](#backtrace-support) support - store debug messages in a ring buffer and display later on demand.
+ 
+## Usage samples
 
-
-
-## Benchmarks
-
-Below are some [benchmarks](bench) comparing popular log libraries under Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
-
-#### Synchronous mode
-Time needed to log 1,000,000 lines in synchronous mode (in seconds, the best of 3 runs):
-
-|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|
-
-
-#### Asynchronous mode
-Time needed to log 1,000,000 lines in asynchronous mode, i.e. the time it takes to put them in the async queue (in seconds, the best of 3 runs):
-
-|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|
-
-
-
-
-## Usage Example
+#### Basic usage
 ```c++
-
 #include "spdlog/spdlog.h"
 
-#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*[])
+int main() 
 {
-    try
+    spdlog::info("Welcome to spdlog!");
+    spdlog::error("Some error message with arg: {}", 1);
+    
+    spdlog::warn("Easy padding in numbers like {:08d}", 12);
+    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+    spdlog::info("Support for floats {:03.2f}", 1.23456);
+    spdlog::info("Positional args are {1} {0}..", "too", "supported");
+    spdlog::info("{:<30}", "left aligned");
+    
+    spdlog::set_level(spdlog::level::debug); // Set global log level to debug
+    spdlog::debug("This message should be displayed..");    
+    
+    // change log pattern
+    spdlog::set_pattern("[%H:%M:%S %z] [%n] [%^---%L---%$] [thread %t] %v");
+    
+    // Compile time log levels
+    // define SPDLOG_ACTIVE_LEVEL to desired level
+    SPDLOG_TRACE("Some trace message with param {}", 42);
+    SPDLOG_DEBUG("Some debug message");
+}
+
+```
+---
+#### Create stdout/stderr logger object
+```c++
+#include "spdlog/spdlog.h"
+#include "spdlog/sinks/stdout_color_sinks.h"
+void stdout_example()
+{
+    // create color multi threaded logger
+    auto console = spdlog::stdout_color_mt("console");    
+    auto err_logger = spdlog::stderr_color_mt("stderr");    
+    spdlog::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name)");
+}
+```
+
+---
+#### Basic file logger
+```c++
+#include "spdlog/sinks/basic_file_sink.h"
+void basic_logfile_example()
+{
+    try 
     {
-        // Multithreaded color console
-        auto console = spd::stdout_logger_mt("console", true);
-        console->info("Welcome to spdlog!");
-        console->info("An info message example {}..", 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");
-        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);
-
-        // 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);
-        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");
-
-        // Compile time debug or trace macros.
-        // Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef 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();
-
-        // 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();
+        auto logger = spdlog::basic_logger_mt("basic_logger", "logs/basic-log.txt");
     }
-	// Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex& ex)
+    catch (const spdlog::spdlog_ex &ex)
     {
         std::cout << "Log init failed: " << ex.what() << std::endl;
-        return 1;
-    }    
+    }
+}
+```
+---
+#### Rotating files
+```c++
+#include "spdlog/sinks/rotating_file_sink.h"
+void rotating_example()
+{
+    // Create a file rotating logger with 5mb size max and 3 rotated files
+    auto max_size = 1048576 * 5;
+    auto max_files = 3;
+    auto logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", max_size, max_files);
+}
+```
+
+---
+#### Daily files
+```c++
+
+#include "spdlog/sinks/daily_file_sink.h"
+void daily_example()
+{
+    // Create a daily logger - a new file is created every day on 2:30am
+    auto logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
 }
 
+```
+
+---
+#### Backtrace support
+```c++
+// Loggers can store in a ring buffer all messages (including debug/trace) and display later on demand.
+// When needed, call dump_backtrace() to see them
+
+spdlog::enable_backtrace(32); // Store the latest 32 messages in a buffer. Older messages will be dropped.
+// or my_logger->enable_backtrace(32)..
+for(int i = 0; i < 100; i++)
+{
+  spdlog::debug("Backtrace message {}", i); // not logged yet..
+}
+// e.g. if some error happened:
+spdlog::dump_backtrace(); // log them now! show the last 32 messages
+
+// or my_logger->dump_backtrace(32)..
+```
+
+---
+#### Periodic flush
+```c++
+// periodically flush all *registered* loggers every 3 seconds:
+// warning: only use if all your loggers are thread safe ("_mt" loggers)
+spdlog::flush_every(std::chrono::seconds(3));
+
+```
+
+---
+#### Stopwatch
+```c++
+// Stopwatch support for spdlog
+#include "spdlog/stopwatch.h"
+void stopwatch_example()
+{
+    spdlog::stopwatch sw;    
+    spdlog::debug("Elapsed {}", sw);
+    spdlog::debug("Elapsed {:.3}", sw);       
+}
+
+```
+
+---
+#### Log binary data in hex
+```c++
+// many types of std::container<char> types can be used.
+// ranges are supported too.
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+// {:a} - show ASCII if :n is not set.
+
+#include "spdlog/fmt/bin_to_hex.h"
+
+void binary_example()
+{
+    auto console = spdlog::get("console");
+    std::array<char, 80> buf;
+    console->info("Binary example: {}", spdlog::to_hex(buf));
+    console->info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
+}
+
+```
+
+---
+#### Logger with multi sinks - each with different format and log level
+```c++
+
+// create logger with 2 targets with different log levels and formats.
+// the console will show only warnings or errors, while the file will log all.
+void multi_sink_example()
+{
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    console_sink->set_level(spdlog::level::warn);
+    console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
+
+    auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
+    file_sink->set_level(spdlog::level::trace);
+
+    spdlog::logger logger("multi_sink", {console_sink, file_sink});
+    logger.set_level(spdlog::level::debug);
+    logger.warn("this should appear in both console and file");
+    logger.info("this message should not appear in the console, only in the file");
+}
+```
+
+---
+#### Asynchronous logging
+```c++
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
 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);
+    // default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(8192, 1); // queue with 8k items and 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");   
 }
 
-//syslog example
-void syslog_example()
+```
+
+---
+#### Asynchronous logger with multi sinks  
+```c++
+#include "spdlog/sinks/stdout_color_sinks.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void multi_sink_example2()
 {
-#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
+    spdlog::init_thread_pool(8192, 1);
+    auto stdout_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt >();
+    auto rotating_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("mylog.txt", 1024*1024*10, 3);
+    std::vector<spdlog::sink_ptr> sinks {stdout_sink, rotating_sink};
+    auto logger = std::make_shared<spdlog::async_logger>("loggername", sinks.begin(), sinks.end(), spdlog::thread_pool(), spdlog::async_overflow_policy::block);
+    spdlog::register_logger(logger);
 }
-
+```
+ 
+---
+#### User defined types
+```c++
 // user defined types logging by implementing operator<<
+#include "spdlog/fmt/ostr.h" // must be included
 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
 void user_defined_example()
 {
-    spd::get("console")->info("user defined type: {}", my_type { 14 });
+    spdlog::get("console")->info("user defined type: {}", my_type{14});
 }
 
-//
-//custom error handler
-//
-void err_handler_example()
-{	
-	spdlog::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)
+```
+
+---
+#### User defined flags in the log pattern
+```c++ 
+// Log patterns can contain custom flags.
+// the following example will add new flag '%*' - which will be bound to a <my_formatter_flag> instance.
+#include "spdlog/pattern_formatter.h"
+class my_formatter_flag : public spdlog::custom_flag_formatter
+{
+public:
+    void format(const spdlog::details::log_msg &, const std::tm &, spdlog::memory_buf_t &dest) override
+    {
+        std::string some_txt = "custom-flag";
+        dest.append(some_txt.data(), some_txt.data() + some_txt.size());
+    }
+
+    std::unique_ptr<custom_flag_formatter> clone() const override
+    {
+        return spdlog::details::make_unique<my_formatter_flag>();
+    }
+};
+
+void custom_flags_example()
+{    
+    auto formatter = std::make_unique<spdlog::pattern_formatter>();
+    formatter->add_flag<my_formatter_flag>('*').set_pattern("[%n] [%*] [%^%l%$] %v");
+    spdlog::set_formatter(std::move(formatter));
 }
 
 ```
 
+---
+#### Custom error handler
+```c++
+void err_handler_example()
+{
+    // can be set globally or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { spdlog::get("console")->error("*** LOGGER ERROR ***: {}", msg); });
+    spdlog::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
+}
+
+```
+
+---
+#### syslog 
+```c++
+#include "spdlog/sinks/syslog_sink.h"
+void syslog_example()
+{
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+}
+```
+---
+#### Android example 
+```c++
+#include "spdlog/sinks/android_sink.h"
+void android_example()
+{
+    std::string tag = "spdlog-android";
+    auto android_logger = spdlog::android_logger_mt("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+}
+```
+
+---
+#### Load log levels from env variable or from argv
+
+```c++
+#include "spdlog/cfg/env.h"
+int main (int argc, char *argv[])
+{
+    spdlog::cfg::load_env_levels();
+    // or from command line:
+    // ./example SPDLOG_LEVEL=info,mylogger=trace
+    // #include "spdlog/cfg/argv.h" // for loading levels from argv
+    // spdlog::cfg::load_argv_levels(argc, argv);
+}
+```
+So then you can:
+
+```console
+$ export SPDLOG_LEVEL=info,mylogger=trace
+$ ./example
+```
+
+---
+## Benchmarks
+
+Below are some [benchmarks](https://github.com/gabime/spdlog/blob/v1.x/bench/bench.cpp) done in Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
+
+#### Synchronous mode
+```
+[info] **************************************************************
+[info] Single thread, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_st         Elapsed: 0.17 secs        5,777,626/sec
+[info] rotating_st      Elapsed: 0.18 secs        5,475,894/sec
+[info] daily_st         Elapsed: 0.20 secs        5,062,659/sec
+[info] empty_logger     Elapsed: 0.07 secs       14,127,300/sec
+[info] **************************************************************
+[info] C-string (400 bytes). Single thread, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_st         Elapsed: 0.41 secs        2,412,483/sec
+[info] rotating_st      Elapsed: 0.72 secs        1,389,196/sec
+[info] daily_st         Elapsed: 0.42 secs        2,393,298/sec
+[info] null_st          Elapsed: 0.04 secs       27,446,957/sec
+[info] **************************************************************
+[info] 10 threads, competing over the same logger object, 1,000,000 iterations
+[info] **************************************************************
+[info] basic_mt         Elapsed: 0.60 secs        1,659,613/sec
+[info] rotating_mt      Elapsed: 0.62 secs        1,612,493/sec
+[info] daily_mt         Elapsed: 0.61 secs        1,638,305/sec
+[info] null_mt          Elapsed: 0.16 secs        6,272,758/sec
+```
+#### Asynchronous mode
+```
+[info] -------------------------------------------------
+[info] Messages     : 1,000,000
+[info] Threads      : 10
+[info] Queue        : 8,192 slots
+[info] Queue memory : 8,192 x 272 = 2,176 KB 
+[info] -------------------------------------------------
+[info] 
+[info] *********************************
+[info] Queue Overflow Policy: block
+[info] *********************************
+[info] Elapsed: 1.70784 secs     585,535/sec
+[info] Elapsed: 1.69805 secs     588,910/sec
+[info] Elapsed: 1.7026 secs      587,337/sec
+[info] 
+[info] *********************************
+[info] Queue Overflow Policy: overrun
+[info] *********************************
+[info] Elapsed: 0.372816 secs    2,682,285/sec
+[info] Elapsed: 0.379758 secs    2,633,255/sec
+[info] Elapsed: 0.373532 secs    2,677,147/sec
+
+```
+
 ## Documentation
 Documentation can be found in the [wiki](https://github.com/gabime/spdlog/wiki/1.-QuickStart) pages.
+
+---
+
+Thanks to [JetBrains](https://www.jetbrains.com/?from=spdlog) for donating product licenses to help develop **spdlog** <a href="https://www.jetbrains.com/?from=spdlog"><img src="logos/jetbrains-variant-4.svg" width="94" align="center" /></a>
+
+

appveyor.yml

@@ -0,0 +1,71 @@
+version: 1.0.{build}
+image: Visual Studio 2017
+environment:
+  matrix:
+    - GENERATOR: '"Visual Studio 14 2015"'
+      BUILD_TYPE: Debug
+      BUILD_SHARED: 'OFF'
+      WCHAR: 'OFF'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 14 2015"'
+      BUILD_TYPE: Release
+      BUILD_SHARED: 'OFF'
+      WCHAR: 'ON'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 14 2015 Win64"'
+      BUILD_TYPE: Debug
+      BUILD_SHARED: 'OFF'
+      WCHAR: 'ON'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 14 2015 Win64"'
+      BUILD_TYPE: Release
+      BUILD_SHARED: 'OFF'
+      WCHAR: 'ON'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 15 2017 Win64"'
+      BUILD_TYPE: Debug
+      BUILD_SHARED: 'OFF'
+      WCHAR: 'ON'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 15 2017 Win64"'
+      BUILD_TYPE: Release
+      BUILD_SHARED: 'OFF'
+      WCHAR: 'OFF'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 15 2017 Win64"'
+      BUILD_TYPE: Release
+      BUILD_SHARED: 'ON'
+      WCHAR: 'OFF'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'ON'
+    - GENERATOR: '"Visual Studio 15 2017 Win64"'
+      BUILD_TYPE: Release
+      BUILD_SHARED: 'ON'
+      WCHAR: 'ON'
+      WCHAR_FILES: 'ON'
+      BUILD_EXAMPLE: 'OFF'
+build_script:
+  - cmd: >-
+      set
+
+      mkdir build
+
+      cd build
+
+      set PATH=%PATH%;C:\Program Files\Git\usr\bin
+
+      cmake -G %GENERATOR% -D CMAKE_BUILD_TYPE=%BUILD_TYPE% -D BUILD_SHARED_LIBS=%BUILD_SHARED% -D SPDLOG_WCHAR_SUPPORT=%WCHAR% -D SPDLOG_WCHAR_FILENAMES=%WCHAR_FILES% -D SPDLOG_BUILD_EXAMPLE=%BUILD_EXAMPLE% -D SPDLOG_BUILD_EXAMPLE_HO=%BUILD_EXAMPLE% -D SPDLOG_BUILD_TESTS=ON -D SPDLOG_BUILD_TESTS_HO=OFF -D SPDLOG_BUILD_WARNINGS=ON ..
+
+      cmake --build . --config %BUILD_TYPE%
+
+before_test:
+  - set PATH=%PATH%;C:\projects\spdlog\build\%BUILD_TYPE%
+  
+test_script:
+  - C:\projects\spdlog\build\tests\%BUILD_TYPE%\spdlog-utests.exe

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/CMakeLists.txt

@@ -0,0 +1,42 @@
+# Copyright(c) 2019 spdlog authors Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+cmake_minimum_required(VERSION 3.10)
+project(spdlog_bench CXX)
+
+if(NOT TARGET spdlog)
+    # Stand-alone build
+    find_package(spdlog CONFIG REQUIRED)
+endif()
+
+find_package(Threads REQUIRED)
+find_package(benchmark CONFIG)
+if (NOT benchmark_FOUND)
+    message(STATUS "Using CMake Version ${CMAKE_VERSION}")
+    if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.11.0")
+        # User can fetch googlebenchmark 			
+        message(STATUS "Downloading GoogleBenchmark")
+        include(FetchContent)
+        set(BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE INTERNAL "")
+        # Do not build and run googlebenchmark tests
+        FetchContent_Declare(googlebenchmark
+            GIT_REPOSITORY https://github.com/google/benchmark.git
+            GIT_TAG v1.5.2)
+
+        FetchContent_MakeAvailable(googlebenchmark)
+    else()
+        message(FATAL_ERROR "GoogleBenchmark is missing. Use CMake >= 3.11 or download it")
+    endif()
+endif()
+
+add_executable(bench bench.cpp)
+spdlog_enable_warnings(bench)
+target_link_libraries(bench PRIVATE spdlog::spdlog)
+
+add_executable(async_bench async_bench.cpp)
+target_link_libraries(async_bench PRIVATE spdlog::spdlog)
+
+add_executable(latency latency.cpp)
+target_link_libraries(latency PRIVATE benchmark::benchmark spdlog::spdlog)
+
+add_executable(formatter-bench formatter-bench.cpp)
+target_link_libraries(formatter-bench PRIVATE benchmark::benchmark spdlog::spdlog)

bench/Makefile

@@ -1,62 +0,0 @@
-CXX	?= g++
-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 spdlog-null-async boost-bench boost-bench-mt glog-bench glog-bench-mt g2log-async easylogging-bench easylogging-bench-mt
-
-all: $(binaries)
-
-spdlog-bench: spdlog-bench.cpp
-	$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-bench-mt: spdlog-bench-mt.cpp
-	$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-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)
-
-	
-	
-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-bench: boost-bench.cpp
-	$(CXX) boost-bench.cpp -o boost-bench $(CXXFLAGS) $(BOOST_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-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-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-async: g2log-async.cpp
-	$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-EASYL_FLAGS = -I../../easylogging/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)	
-	
-.PHONY: clean
-
-clean:
-	rm -f *.o logs/* $(binaries)
-
-
-rebuild: clean all
-
-
-

bench/Makefile.mingw

@@ -1,57 +0,0 @@
-CXX	?= g++
-CXXFLAGS	= -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -pedantic -std=c++11 -pthread -Wl,--no-as-needed  -I../include 
-CXX_RELEASE_FLAGS = -O3 -flto
-
-
-binaries=spdlog-bench spdlog-bench-mt spdlog-async boost-bench boost-bench-mt glog-bench glog-bench-mt g2log-async easylogging-bench easylogging-bench-mt
-
-all: $(binaries)
-
-spdlog-bench: spdlog-bench.cpp
-	$(CXX) spdlog-bench.cpp -o spdlog-bench $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-bench-mt: spdlog-bench-mt.cpp
-	$(CXX) spdlog-bench-mt.cpp -o spdlog-bench-mt  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-spdlog-async: spdlog-async.cpp
-	$(CXX) spdlog-async.cpp -o spdlog-async  $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-BOOST_FLAGS	= -DBOOST_LOG_DYN_LINK  -I/home/gabi/devel/boost_1_56_0/ -L/home/gabi/devel/boost_1_56_0/stage/lib -lboost_log  -lboost_log_setup -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)
-	
-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-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-async: g2log-async.cpp
-	$(CXX) g2log-async.cpp -o g2log-async $(CXXFLAGS) $(G2LOG_FLAGS) $(CXX_RELEASE_FLAGS)
-	
-
-EASYL_FLAGS = -I../../easylogging/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)	
-	
-.PHONY: clean
-
-clean:
-	rm -f *.o logs/* $(binaries)
-
-
-rebuild: clean all
-
-
-

bench/async_bench.cpp

@@ -0,0 +1,185 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+
+#ifdef SPDLOG_FMT_EXTERNAL
+#include <fmt/locale.h>
+#else
+#include "spdlog/fmt/bundled/locale.h"
+#endif
+
+#include "utils.h"
+#include <atomic>
+#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;
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4996) // disable fopen warning under msvc
+#endif // _MSC_VER
+
+int count_lines(const char *filename)
+{
+    int counter = 0;
+    auto *infile = fopen(filename, "r");
+    int ch;
+    while (EOF != (ch = getc(infile)))
+    {
+        if ('\n' == ch)
+            counter++;
+    }
+    fclose(infile);
+
+    return counter;
+}
+
+void verify_file(const char *filename, int expected_count)
+{
+    spdlog::info("Verifying {} to contain {} line..", filename, expected_count);
+    auto count = count_lines(filename);
+    if (count != expected_count)
+    {
+        spdlog::error("Test failed. {} has {} lines instead of {}", filename, count, expected_count);
+        exit(1);
+    }
+    spdlog::info("Line count OK ({})\n", count);
+}
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+int main(int argc, char *argv[])
+{
+
+    int howmany = 1000000;
+    int queue_size = std::min(howmany + 2, 8192);
+    int threads = 10;
+    int iters = 3;
+
+    try
+    {
+        spdlog::set_pattern("[%^%l%$] %v");
+        if (argc == 1)
+        {
+            spdlog::info("Usage: {} <message_count> <threads> <q_size> <iterations>", argv[0]);
+            return 0;
+        }
+
+        if (argc > 1)
+            howmany = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
+        if (argc > 3)
+        {
+            queue_size = atoi(argv[3]);
+            if (queue_size > 500000)
+            {
+                spdlog::error("Max queue size allowed: 500,000");
+                exit(1);
+            }
+        }
+
+        if (argc > 4)
+            iters = atoi(argv[4]);
+
+        auto slot_size = sizeof(spdlog::details::async_msg);
+        spdlog::info("-------------------------------------------------");
+        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Messages     : {:L}", howmany));
+        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Threads      : {:L}", threads));
+        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Queue        : {:L} slots", queue_size));
+        spdlog::info(fmt::format(
+            std::locale("en_US.UTF-8"), "Queue memory : {:L} x {:L} = {:L} KB ", queue_size, slot_size, (queue_size * slot_size) / 1024));
+        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Total iters  : {:L}", iters));
+        spdlog::info("-------------------------------------------------");
+
+        const char *filename = "logs/basic_async.log";
+        spdlog::info("");
+        spdlog::info("*********************************");
+        spdlog::info("Queue Overflow Policy: block");
+        spdlog::info("*********************************");
+        for (int i = 0; i < iters; i++)
+        {
+            auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
+            auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
+            auto logger = std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::block);
+            bench_mt(howmany, std::move(logger), threads);
+            // verify_file(filename, howmany);
+        }
+
+        spdlog::info("");
+        spdlog::info("*********************************");
+        spdlog::info("Queue Overflow Policy: overrun");
+        spdlog::info("*********************************");
+        // do same test but discard oldest if queue is full instead of blocking
+        filename = "logs/basic_async-overrun.log";
+        for (int i = 0; i < iters; i++)
+        {
+            auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
+            auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
+            auto logger =
+                std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::overrun_oldest);
+            bench_mt(howmany, std::move(logger), threads);
+        }
+        spdlog::shutdown();
+    }
+    catch (std::exception &ex)
+    {
+        std::cerr << "Error: " << ex.what() << std::endl;
+        perror("Last error");
+        return 1;
+    }
+    return 0;
+}
+
+void thread_fun(std::shared_ptr<spdlog::logger> logger, int howmany)
+{
+    for (int i = 0; i < howmany; i++)
+    {
+        logger->info("Hello logger: msg number {}", i);
+    }
+}
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> logger, int thread_count)
+{
+    using std::chrono::high_resolution_clock;
+    vector<thread> threads;
+    auto start = high_resolution_clock::now();
+
+    int msgs_per_thread = howmany / thread_count;
+    int msgs_per_thread_mod = howmany % thread_count;
+    for (int t = 0; t < thread_count; ++t)
+    {
+        if (t == 0 && msgs_per_thread_mod)
+            threads.push_back(std::thread(thread_fun, logger, msgs_per_thread + msgs_per_thread_mod));
+        else
+            threads.push_back(std::thread(thread_fun, logger, msgs_per_thread));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    };
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Elapsed: {} secs\t {:L}/sec", delta_d, int(howmany / delta_d)));
+}

bench/bench.cpp

@@ -0,0 +1,246 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/spdlog.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/daily_file_sink.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+#ifdef SPDLOG_FMT_EXTERNAL
+#include <fmt/locale.h>
+#else
+#include "spdlog/fmt/bundled/locale.h"
+#endif
+
+#include "utils.h"
+#include <atomic>
+#include <cstdlib> // EXIT_FAILURE
+#include <memory>
+#include <string>
+#include <thread>
+
+void bench(int howmany, std::shared_ptr<spdlog::logger> log);
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, size_t thread_count);
+
+// void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log);
+// void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log);
+
+static const size_t file_size = 30 * 1024 * 1024;
+static const size_t rotating_files = 5;
+static const int max_threads = 1000;
+
+void bench_threaded_logging(size_t threads, int iters)
+{
+    spdlog::info("**************************************************************");
+    spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Multi threaded: {:L} threads, {:L} messages", threads, iters));
+    spdlog::info("**************************************************************");
+
+    auto basic_mt = spdlog::basic_logger_mt("basic_mt", "logs/basic_mt.log", true);
+    bench_mt(iters, std::move(basic_mt), threads);
+    auto basic_mt_tracing = spdlog::basic_logger_mt("basic_mt/backtrace-on", "logs/basic_mt.log", true);
+    basic_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(basic_mt_tracing), threads);
+
+    spdlog::info("");
+    auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
+    bench_mt(iters, std::move(rotating_mt), threads);
+    auto rotating_mt_tracing = spdlog::rotating_logger_mt("rotating_mt/backtrace-on", "logs/rotating_mt.log", file_size, rotating_files);
+    rotating_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(rotating_mt_tracing), threads);
+
+    spdlog::info("");
+    auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
+    bench_mt(iters, std::move(daily_mt), threads);
+    auto daily_mt_tracing = spdlog::daily_logger_mt("daily_mt/backtrace-on", "logs/daily_mt.log");
+    daily_mt_tracing->enable_backtrace(32);
+    bench_mt(iters, std::move(daily_mt_tracing), threads);
+
+    spdlog::info("");
+    auto empty_logger = std::make_shared<spdlog::logger>("level-off");
+    empty_logger->set_level(spdlog::level::off);
+    bench(iters, empty_logger);
+    auto empty_logger_tracing = std::make_shared<spdlog::logger>("level-off/backtrace-on");
+    empty_logger_tracing->set_level(spdlog::level::off);
+    empty_logger_tracing->enable_backtrace(32);
+    bench(iters, empty_logger_tracing);
+}
+
+void bench_single_threaded(int iters)
+{
+    spdlog::info("**************************************************************");
+    spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Single threaded: {} messages", iters));
+    spdlog::info("**************************************************************");
+
+    auto basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_st.log", true);
+    bench(iters, std::move(basic_st));
+
+    auto basic_st_tracing = spdlog::basic_logger_st("basic_st/backtrace-on", "logs/basic_st.log", true);
+    bench(iters, std::move(basic_st_tracing));
+
+    spdlog::info("");
+    auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
+    bench(iters, std::move(rotating_st));
+    auto rotating_st_tracing = spdlog::rotating_logger_st("rotating_st/backtrace-on", "logs/rotating_st.log", file_size, rotating_files);
+    rotating_st_tracing->enable_backtrace(32);
+    bench(iters, std::move(rotating_st_tracing));
+
+    spdlog::info("");
+    auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
+    bench(iters, std::move(daily_st));
+    auto daily_st_tracing = spdlog::daily_logger_st("daily_st/backtrace-on", "logs/daily_st.log");
+    daily_st_tracing->enable_backtrace(32);
+    bench(iters, std::move(daily_st_tracing));
+
+    spdlog::info("");
+    auto empty_logger = std::make_shared<spdlog::logger>("level-off");
+    empty_logger->set_level(spdlog::level::off);
+    bench(iters, empty_logger);
+
+    auto empty_logger_tracing = std::make_shared<spdlog::logger>("level-off/backtrace-on");
+    empty_logger_tracing->set_level(spdlog::level::off);
+    empty_logger_tracing->enable_backtrace(32);
+    bench(iters, empty_logger_tracing);
+}
+
+int main(int argc, char *argv[])
+{
+    spdlog::set_automatic_registration(false);
+    spdlog::default_logger()->set_pattern("[%^%l%$] %v");
+    int iters = 250000;
+    size_t threads = 4;
+    try
+    {
+
+        if (argc > 1)
+        {
+            iters = std::stoi(argv[1]);
+        }
+        if (argc > 2)
+        {
+            threads = std::stoul(argv[2]);
+        }
+
+        if (threads > max_threads)
+        {
+            throw std::runtime_error(fmt::format("Number of threads exceeds maximum({}})", max_threads));
+        }
+
+        bench_single_threaded(iters);
+        bench_threaded_logging(1, iters);
+        bench_threaded_logging(threads, iters);
+    }
+    catch (std::exception &ex)
+    {
+        spdlog::error(ex.what());
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
+
+void bench(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::duration;
+    using std::chrono::duration_cast;
+    using std::chrono::high_resolution_clock;
+
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        log->info("Hello logger: msg number {}", i);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+
+    spdlog::info(
+        fmt::format(std::locale("en_US.UTF-8"), "{:<30} Elapsed: {:0.2f} secs {:>16L}/sec", log->name(), delta_d, int(howmany / delta_d)));
+    spdlog::drop(log->name());
+}
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, size_t thread_count)
+{
+    using std::chrono::duration;
+    using std::chrono::duration_cast;
+    using std::chrono::high_resolution_clock;
+
+    std::vector<std::thread> threads;
+    threads.reserve(thread_count);
+    auto start = high_resolution_clock::now();
+    for (size_t t = 0; t < thread_count; ++t)
+    {
+        threads.emplace_back([&]() {
+            for (int j = 0; j < howmany / static_cast<int>(thread_count); j++)
+            {
+                log->info("Hello logger: msg number {}", j);
+            }
+        });
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    };
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::info(
+        fmt::format(std::locale("en_US.UTF-8"), "{:<30} Elapsed: {:0.2f} secs {:>16L}/sec", log->name(), delta_d, int(howmany / delta_d)));
+    spdlog::drop(log->name());
+}
+
+/*
+void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::high_resolution_clock;
+    using std::chrono::duration;
+    using std::chrono::duration_cast;
+
+    auto orig_default = spdlog::default_logger();
+    spdlog::set_default_logger(log);
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        spdlog::info("Hello logger: msg number {}", i);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::drop(log->name());
+    spdlog::set_default_logger(std::move(orig_default));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16}/sec", log->name(), delta_d, int(howmany / delta_d));
+}
+
+void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::high_resolution_clock;
+    using std::chrono::duration;
+    using std::chrono::duration_cast;
+
+    const char *msg = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum pharetra metus cursus "
+                      "lacus placerat congue. Nulla egestas, mauris a tincidunt tempus, enim lectus volutpat mi, eu consequat sem "
+                      "libero nec massa. In dapibus ipsum a diam rhoncus gravida. Etiam non dapibus eros. Donec fringilla dui sed "
+                      "augue pretium, nec scelerisque est maximus. Nullam convallis, sem nec blandit maximus, nisi turpis ornare "
+                      "nisl, sit amet volutpat neque massa eu odio. Maecenas malesuada quam ex, posuere congue nibh turpis duis.";
+
+    auto orig_default = spdlog::default_logger();
+    spdlog::set_default_logger(log);
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        spdlog::log(spdlog::level::info, msg);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::drop(log->name());
+    spdlog::set_default_logger(std::move(orig_default));
+    spdlog::info("{:<30} Elapsed: {:0.2f} secs {:>16}/sec", log->name(), delta_d, int(howmany / delta_d));
+}
+
+*/

bench/boost-bench-mt.cpp

@@ -1,84 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#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>
-
-namespace logging = boost::log;
-namespace src = boost::log::sources;
-namespace sinks = boost::log::sinks;
-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::core::get()->set_filter
-    (
-        logging::trivial::severity >= logging::trivial::info
-    );
-}
-
-
-
-using namespace std;
-
-int main(int argc, char* argv[])
-{
-    int thread_count = 10;
-    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;
-
-    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;
-                BOOST_LOG_SEV(lg, info) << "boost message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-
-    for(auto &t:threads)
-    {
-        t.join();
-    };
-
-
-    return 0;
-}

bench/boost-bench.cpp

@@ -1,48 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#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>
-
-namespace logging = boost::log;
-namespace src = boost::log::sources;
-namespace sinks = boost::log::sinks;
-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::core::get()->set_filter
-    (
-        logging::trivial::severity >= logging::trivial::info
-    );
-}
-
-
-int main(int argc, char* [])
-{
-    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)
-        BOOST_LOG_SEV(lg, info) << "boost message #" << i << ": This is some text for your pleasure";
-
-    return 0;
-}

bench/easyl.conf

@@ -1,10 +0,0 @@
-* GLOBAL:
-    FORMAT                  =   "[%datetime]: %msg"
-    FILENAME                =   ./logs/easylogging.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/easylogging-bench-mt.cpp

@@ -1,52 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <thread>
-#include <vector>
-#include <atomic>
-
-#define _ELPP_THREAD_SAFE
-#include "easylogging++.h"
-_INITIALIZE_EASYLOGGINGPP
-
-using namespace std;
-
-int main(int argc, char* argv[])
-{
-
-    int thread_count = 10;
-    if(argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    // Load configuration from file
-    el::Configurations conf("easyl.conf");
-    el::Loggers::reconfigureLogger("default", conf);
-
-    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;
-                LOG(INFO) << "easylog message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-
-    for(auto &t:threads)
-    {
-        t.join();
-    };
-
-    return 0;
-}

bench/easylogging-bench.cpp

@@ -1,22 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-
-#include "easylogging++.h"
-
-_INITIALIZE_EASYLOGGINGPP
-
-int main(int, char* [])
-{
-    int howmany = 1000000;
-
-    // Load configuration from file
-    el::Configurations conf("easyl.conf");
-    el::Loggers::reconfigureLogger("default", conf);
-
-    for(int i  = 0 ; i < howmany; ++i)
-        LOG(INFO) << "easylog message #" << i << ": This is some text for your pleasure";
-    return 0;
-}

bench/formatter-bench.cpp

@@ -0,0 +1,80 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/pattern_formatter.h"
+
+void bench_formatter(benchmark::State &state, std::string pattern)
+{
+    auto formatter = spdlog::details::make_unique<spdlog::pattern_formatter>(pattern);
+    spdlog::memory_buf_t dest;
+    std::string logger_name = "logger-name";
+    const char *text = "Hello. This is some message with length of 80                                   ";
+
+    spdlog::source_loc source_loc{"a/b/c/d/myfile.cpp", 123, "some_func()"};
+    spdlog::details::log_msg msg(source_loc, logger_name, spdlog::level::info, text);
+
+    for (auto _ : state)
+    {
+        dest.clear();
+        formatter->format(msg, dest);
+        benchmark::DoNotOptimize(dest);
+    }
+}
+
+void bench_formatters()
+{
+    // basic patterns(single flag)
+    std::string all_flags = "+vtPnlLaAbBcCYDmdHIMSefFprRTXzEisg@luioO%";
+    std::vector<std::string> basic_patterns;
+    for (auto &flag : all_flags)
+    {
+        auto pattern = std::string("%") + flag;
+        benchmark::RegisterBenchmark(pattern.c_str(), &bench_formatter, pattern);
+
+        //        pattern = std::string("%16") + flag;
+        //        benchmark::RegisterBenchmark(pattern.c_str(), &bench_formatter, pattern);
+        //
+        //        // bench center padding
+        //        pattern = std::string("%=16") + flag;
+        //        benchmark::RegisterBenchmark(pattern.c_str(), &bench_formatter, pattern);
+    }
+
+    // complex patterns
+    std::vector<std::string> patterns = {
+        "[%D %X] [%l] [%n] %v",
+        "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] %v",
+        "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] [%t] %v",
+    };
+    for (auto &pattern : patterns)
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), &bench_formatter, pattern)->Iterations(2500000);
+    }
+}
+
+int main(int argc, char *argv[])
+{
+
+    spdlog::set_pattern("[%^%l%$] %v");
+    if (argc != 2)
+    {
+        spdlog::error("Usage: {} <pattern> (or \"all\" to bench all)", argv[0]);
+        exit(1);
+    }
+
+    std::string pattern = argv[1];
+    if (pattern == "all")
+    {
+        bench_formatters();
+    }
+    else
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), &bench_formatter, pattern);
+    }
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}

bench/g2log-async.cpp

@@ -1,62 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <thread>
-#include <vector>
-#include <atomic>
-#include <iostream>
-#include <chrono>
-
-#include "g2logworker.h"
-#include "g2log.h"
-
-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;
-
-    g2LogWorker g2log(argv[0], "logs");
-    g2::initializeLogging(&g2log);
-
-
-    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) << "g2log 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

@@ -1,50 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <thread>
-#include <vector>
-#include <atomic>
-
-#include "glog/logging.h"
-
-using namespace std;
-
-int main(int argc, char* argv[])
-{
-
-    int thread_count = 10;
-    if(argc > 1)
-        thread_count = atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    FLAGS_logtostderr = 0;
-    FLAGS_log_dir = "logs";
-    google::InitGoogleLogging(argv[0]);
-
-    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;
-                LOG(INFO) << "glog message #" << counter << ": This is some text for your pleasure";
-            }
-        }));
-    }
-
-
-    for(auto &t:threads)
-    {
-        t.join();
-    };
-
-    return 0;
-}

bench/glog-bench.cpp

@@ -1,21 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include "glog/logging.h"
-
-
-int main(int, char* argv[])
-{
-    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";
-
-    return 0;
-}

bench/latency.cpp

@@ -0,0 +1,177 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// latency.cpp : spdlog latency benchmarks
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/daily_file_sink.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void bench_c_string(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    const char *msg = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum pharetra metus cursus "
+                      "lacus placerat congue. Nulla egestas, mauris a tincidunt tempus, enim lectus volutpat mi, eu consequat sem "
+                      "libero nec massa. In dapibus ipsum a diam rhoncus gravida. Etiam non dapibus eros. Donec fringilla dui sed "
+                      "augue pretium, nec scelerisque est maximus. Nullam convallis, sem nec blandit maximus, nisi turpis ornare "
+                      "nisl, sit amet volutpat neque massa eu odio. Maecenas malesuada quam ex, posuere congue nibh turpis duis.";
+
+    for (auto _ : state)
+    {
+        logger->info(msg);
+    }
+}
+
+void bench_logger(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    for (auto _ : state)
+    {
+        logger->info("Hello logger: msg number {}...............", ++i);
+    }
+}
+
+void bench_logger_fmt_string(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    for (auto _ : state)
+    {
+        logger->info(FMT_STRING("Hello logger: msg number {}..............."), ++i);
+        ;
+    }
+}
+
+void bench_disabled_macro(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    benchmark::DoNotOptimize(i);      // prevent unused warnings
+    benchmark::DoNotOptimize(logger); // prevent unused warnings
+    for (auto _ : state)
+    {
+        SPDLOG_LOGGER_DEBUG(logger, "Hello logger: msg number {}...............", i++);
+        SPDLOG_DEBUG("Hello logger: msg number {}...............", i++);
+    }
+}
+
+#ifdef __linux__
+void bench_dev_null()
+{
+    auto dev_null_st = spdlog::basic_logger_st("/dev/null_st", "/dev/null");
+    benchmark::RegisterBenchmark("/dev/null_st", bench_logger, std::move(dev_null_st))->UseRealTime();
+    spdlog::drop("/dev/null_st");
+
+    auto dev_null_mt = spdlog::basic_logger_mt("/dev/null_mt", "/dev/null");
+    benchmark::RegisterBenchmark("/dev/null_mt", bench_logger, std::move(dev_null_mt))->UseRealTime();
+    spdlog::drop("/dev/null_mt");
+}
+#endif // __linux__
+
+int main(int argc, char *argv[])
+{
+    using spdlog::sinks::null_sink_mt;
+    using spdlog::sinks::null_sink_st;
+
+    size_t file_size = 30 * 1024 * 1024;
+    size_t rotating_files = 5;
+    int n_threads = benchmark::CPUInfo::Get().num_cpus;
+
+    auto full_bench = argc > 1 && std::string(argv[1]) == "full";
+
+    // disabled loggers
+    auto disabled_logger = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    disabled_logger->set_level(spdlog::level::off);
+    benchmark::RegisterBenchmark("disabled-at-compile-time", bench_disabled_macro, disabled_logger);
+    benchmark::RegisterBenchmark("disabled-at-runtime", bench_logger, disabled_logger);
+    // with backtrace of 64
+    auto tracing_disabled_logger = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    tracing_disabled_logger->enable_backtrace(64);
+    benchmark::RegisterBenchmark("disabled-at-runtime/backtrace", bench_logger, tracing_disabled_logger);
+
+    auto null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
+    benchmark::RegisterBenchmark("null_sink_st (500_bytes c_str)", bench_c_string, std::move(null_logger_st));
+    benchmark::RegisterBenchmark("null_sink_st", bench_logger, null_logger_st);
+    benchmark::RegisterBenchmark("null_sink_fmt_string", bench_logger_fmt_string, null_logger_st);
+    // with backtrace of 64
+    auto tracing_null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
+    tracing_null_logger_st->enable_backtrace(64);
+    benchmark::RegisterBenchmark("null_sink_st/backtrace", bench_logger, tracing_null_logger_st);
+
+#ifdef __linux
+    bench_dev_null();
+#endif // __linux__
+
+    if (full_bench)
+    {
+        // basic_st
+        auto basic_st = spdlog::basic_logger_st("basic_st", "latency_logs/basic_st.log", true);
+        benchmark::RegisterBenchmark("basic_st", bench_logger, std::move(basic_st))->UseRealTime();
+        spdlog::drop("basic_st");
+        // with backtrace of 64
+        auto tracing_basic_st = spdlog::basic_logger_st("tracing_basic_st", "latency_logs/tracing_basic_st.log", true);
+        tracing_basic_st->enable_backtrace(64);
+        benchmark::RegisterBenchmark("basic_st/backtrace", bench_logger, std::move(tracing_basic_st))->UseRealTime();
+        spdlog::drop("tracing_basic_st");
+
+        // rotating st
+        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "latency_logs/rotating_st.log", file_size, rotating_files);
+        benchmark::RegisterBenchmark("rotating_st", bench_logger, std::move(rotating_st))->UseRealTime();
+        spdlog::drop("rotating_st");
+        // with backtrace of 64
+        auto tracing_rotating_st =
+            spdlog::rotating_logger_st("tracing_rotating_st", "latency_logs/tracing_rotating_st.log", file_size, rotating_files);
+        benchmark::RegisterBenchmark("rotating_st/backtrace", bench_logger, std::move(tracing_rotating_st))->UseRealTime();
+        spdlog::drop("tracing_rotating_st");
+
+        // daily st
+        auto daily_st = spdlog::daily_logger_mt("daily_st", "latency_logs/daily_st.log");
+        benchmark::RegisterBenchmark("daily_st", bench_logger, std::move(daily_st))->UseRealTime();
+        spdlog::drop("daily_st");
+        auto tracing_daily_st = spdlog::daily_logger_mt("tracing_daily_st", "latency_logs/daily_st.log");
+        benchmark::RegisterBenchmark("daily_st/backtrace", bench_logger, std::move(tracing_daily_st))->UseRealTime();
+        spdlog::drop("tracing_daily_st");
+
+        //
+        // Multi threaded bench, 10 loggers using same logger concurrently
+        //
+        auto null_logger_mt = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+        benchmark::RegisterBenchmark("null_sink_mt", bench_logger, null_logger_mt)->Threads(n_threads)->UseRealTime();
+
+        // basic_mt
+        auto basic_mt = spdlog::basic_logger_mt("basic_mt", "latency_logs/basic_mt.log", true);
+        benchmark::RegisterBenchmark("basic_mt", bench_logger, std::move(basic_mt))->Threads(n_threads)->UseRealTime();
+        spdlog::drop("basic_mt");
+
+        // rotating mt
+        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "latency_logs/rotating_mt.log", file_size, rotating_files);
+        benchmark::RegisterBenchmark("rotating_mt", bench_logger, std::move(rotating_mt))->Threads(n_threads)->UseRealTime();
+        spdlog::drop("rotating_mt");
+
+        // daily mt
+        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "latency_logs/daily_mt.log");
+        benchmark::RegisterBenchmark("daily_mt", bench_logger, std::move(daily_mt))->Threads(n_threads)->UseRealTime();
+        spdlog::drop("daily_mt");
+    }
+
+    // async
+    auto queue_size = 1024 * 1024 * 3;
+    auto tp = std::make_shared<spdlog::details::thread_pool>(queue_size, 1);
+    auto async_logger = std::make_shared<spdlog::async_logger>(
+        "async_logger", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
+    benchmark::RegisterBenchmark("async_logger", bench_logger, async_logger)->Threads(n_threads)->UseRealTime();
+
+    auto async_logger_tracing = std::make_shared<spdlog::async_logger>(
+        "async_logger_tracing", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
+    async_logger_tracing->enable_backtrace(32);
+    benchmark::RegisterBenchmark("async_logger/tracing", bench_logger, async_logger_tracing)->Threads(n_threads)->UseRealTime();
+
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}

bench/logs/.gitignore

@@ -1,4 +0,0 @@
-# Ignore everything in this directory
-*
-# Except this file
-!.gitignore

bench/spdlog-async.cpp

@@ -1,62 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <thread>
-#include <vector>
-#include <atomic>
-#include <iostream>
-#include <chrono>
-#include <cstdlib>
-#include "spdlog/spdlog.h"
-
-using namespace std;
-
-int main(int argc, char* argv[])
-{
-
-    using namespace std::chrono;
-    using clock=steady_clock;
-    namespace spd = spdlog;
-
-    int thread_count = 10;
-    if(argc > 1)
-        thread_count = ::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");
-
-
-    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;
-                logger->info("spdlog message #{}: This is some text for your pleasure", counter);
-            }
-        }));
-    }
-
-    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/spdlog-bench-mt.cpp

@@ -1,55 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include <thread>
-#include <vector>
-#include <atomic>
-#include <cstdlib>
-#include "spdlog/spdlog.h"
-
-
-using namespace std;
-
-int main(int argc, char* argv[])
-{
-
-    int thread_count = 10;
-    if(argc > 1)
-        thread_count = std::atoi(argv[1]);
-
-    int howmany = 1000000;
-
-    namespace spd = spdlog;
-
-    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};
-    std::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;
-                logger->info("spdlog message #{}: This is some text for your pleasure", counter);
-            }
-        }));
-    }
-
-
-    for(auto &t:threads)
-    {
-        t.join();
-    };
-
-
-
-    return 0;
-}

bench/spdlog-bench.cpp

@@ -1,20 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#include "spdlog/spdlog.h"
-
-
-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);
-
-    logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
-    for(int i  = 0 ; i < howmany; ++i)
-        logger->info("spdlog message #{} : This is some text for your pleasure", i);
-    return 0;
-}

bench/spdlog-null-async.cpp

@@ -1,112 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-//
-// bench.cpp : spdlog benchmarks
-//
-#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/null_sink.h"
-#include "utils.h"
-
-
-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

@@ -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

cmake/Config.cmake.in

@@ -1,24 +0,0 @@
-# *************************************************************************/
-# * 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.                */
-# *************************************************************************/
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")

cmake/ide.cmake

@@ -0,0 +1,18 @@
+# ---------------------------------------------------------------------------------------
+# IDE support for headers
+# ---------------------------------------------------------------------------------------
+set(SPDLOG_HEADERS_DIR "${CMAKE_CURRENT_LIST_DIR}/../include")
+
+file(GLOB SPDLOG_TOP_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/*.h")
+file(GLOB SPDLOG_DETAILS_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/details/*.h")
+file(GLOB SPDLOG_SINKS_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/sinks/*.h")
+file(GLOB SPDLOG_FMT_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/fmt/*.h")
+file(GLOB SPDLOG_FMT_BUNDELED_HEADERS "${SPDLOG_HEADERS_DIR}/spdlog/fmt/bundled/*.h")
+set(SPDLOG_ALL_HEADERS ${SPDLOG_TOP_HEADERS} ${SPDLOG_DETAILS_HEADERS} ${SPDLOG_SINKS_HEADERS} ${SPDLOG_FMT_HEADERS}
+                       ${SPDLOG_FMT_BUNDELED_HEADERS})
+
+source_group("Header Files\\spdlog" FILES ${SPDLOG_TOP_HEADERS})
+source_group("Header Files\\spdlog\\details" FILES ${SPDLOG_DETAILS_HEADERS})
+source_group("Header Files\\spdlog\\sinks" FILES ${SPDLOG_SINKS_HEADERS})
+source_group("Header Files\\spdlog\\fmt" FILES ${SPDLOG_FMT_HEADERS})
+source_group("Header Files\\spdlog\\fmt\\bundled\\" FILES ${SPDLOG_FMT_BUNDELED_HEADERS})

cmake/pch.h.in

@@ -0,0 +1,258 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+// details/pattern_formatter-inl.h
+// fmt/bin_to_hex.h
+// fmt/bundled/format-inl.h
+#include <cctype>
+
+// details/file_helper-inl.h
+// details/os-inl.h
+// fmt/bundled/core.h
+// fmt/bundled/posix.h
+// logger-inl.h
+// sinks/daily_file_sink.h
+// sinks/stdout_sinks.h
+#include <cstdio>
+
+// details/os-inl.h
+// fmt/bundled/posix.h
+#include <cstdlib>
+
+// details/os-inl.h
+// details/pattern_formatter-inl.h
+// fmt/bundled/core.h
+// fmt/bundled/format-inl.h
+#include <cstring>
+
+// details/os-inl.h
+// details/os.h
+// details/pattern_formatter-inl.h
+// details/pattern_formatter.h
+// fmt/bundled/chrono.h
+// sinks/daily_file_sink.h
+// sinks/rotating_file_sink-inl.h
+#include <ctime>
+
+// fmt/bundled/format-inl.h
+#include <climits>
+
+// fmt/bundled/format-inl.h
+#include <cwchar>
+
+// fmt/bundled/format-inl.h
+// fmt/bundled/format.h
+#include <cmath>
+
+// fmt/bundled/format-inl.h
+#include <cstdarg>
+
+// details/file_helper-inl.h
+// fmt/bundled/format.h
+// fmt/bundled/posix.h
+// sinks/rotating_file_sink-inl.h
+#include <cerrno>
+
+// details/circular_q.h
+// details/thread_pool-inl.h
+// fmt/bundled/format-inl.h
+#include <cassert>
+
+// async_logger-inl.h
+// cfg/helpers-inl.h
+// log_levels.h
+// common.h
+// details/file_helper-inl.h
+// details/log_msg.h
+// details/os-inl.h
+// details/pattern_formatter-inl.h
+// details/pattern_formatter.h
+// details/registry-inl.h
+// details/registry.h
+// details/tcp_client-windows.h
+// details/tcp_client.h
+// fmt/bundled/core.h
+// sinks/android_sink.h
+// sinks/ansicolor_sink.h
+// sinks/basic_file_sink.h
+// sinks/daily_file_sink.h
+// sinks/dup_filter_sink.h
+// sinks/msvc_sink.h
+// sinks/ringbuffer_sink.h
+// sinks/rotating_file_sink-inl.h
+// sinks/rotating_file_sink.h
+// sinks/syslog_sink.h
+// sinks/tcp_sink.h
+// sinks/win_eventlog_sink.h
+// sinks/wincolor_sink.h
+// spdlog.h:
+#include <string>
+
+// cfg/helpers-inl.h
+// fmt/bundled/chrono.h
+#include <sstream>
+
+// fmt/bundled/ostream.h
+// sinks/ostream_sink.h
+#include <ostream>
+
+// cfg/log_levels.h
+// details/registry-inl.h
+// details/registry.h
+#include <unordered_map>
+
+// details/circular_q.h
+// details/pattern_formatter-inl.h
+// details/pattern_formatter.h
+// details/thread_pool.h
+// fmt/bundled/compile.h
+// logger.h
+// sinks/dist_sink.h
+// sinks/ringbuffer_sink.h
+// sinks/win_eventlog_sink.h
+#include <vector>
+
+// details/os-inl.h
+// details/pattern_formatter-inl.h
+// sinks/ansicolor_sink.h
+// sinks/syslog_sink.h
+// sinks/systemd_sink.h
+// sinks/wincolor_sink.h
+#include <array>
+
+// details/file_helper-inl.h
+// details/file_helper.h
+// sinks/rotating_file_sink-inl.h
+#include <tuple>
+
+// details/os-inl.h
+// fmt/bundled/format.h
+// fmt/bundled/printf.h
+#include <limits>
+
+// common.h
+// details/backtracer.h
+// details/null_mutex.h
+#include <atomic>
+
+// common.h
+// details/backtracer.h
+// details/null_mutex.h
+#include <locale>
+
+// common.h
+#include <initializer_list>
+
+// common.h
+#include <exception>
+
+// common.h
+// details/fmt_helper.h
+// fmt/bundled/core.h
+// fmt/bundled/ranges.h
+#include <type_traits>
+
+// cfg/helpers-inl.h
+// details/null_mutex.h
+// details/pattern_formatter-inl.h
+#include <utility>
+
+// async.h
+// async_logger-inl.h
+// common.h
+// details/pattern_formatter-inl.h
+// details/pattern_formatter.h
+// details/registry-inl.h
+// details/registry.h
+// details/thread_pool.h
+// fmt/bundled/format.h
+// sinks/ansicolor_sink.h
+// sinks/base_sink-inl.h
+// sinks/dist_sink.h
+// sinks/stdout_sinks-inl.h
+// sinks/wincolor_sink.h
+// spdlog.h
+#include <memory>
+
+// async.h
+// common.h
+// details/backtracer.h
+// details/periodic_worker.h
+// details/registry-inl.h
+// details/registry.h
+// details/thread_pool.h
+// sinks/tcp_sink.h
+// spdlog.h
+#include <functional>
+
+// details/mpmc_blocking_q.h
+// details/periodic_worker.h
+#include <condition_variable>
+
+// details/os-inl.h
+// fmt/bundled/format.h
+// fmt/bundled/printf.h
+// sinks/dist_sink.h
+#include <algorithm>
+
+// common.h
+// details/file_helper-inl.h
+// details/fmt_helper.h
+// details/os-inl.h
+// details/pattern_formatter-inl.h
+// details/pattern_formatter.h
+// details/periodic_worker.h
+// details/registry-inl.h
+// details/registry.h
+// details/thread_pool.h
+// fmt/bundled/chrono.h
+// sinks/android_sink.h
+// sinks/daily_file_sink.h
+// sinks/dup_filter_sink.h
+// sinks/rotating_file_sink-inl.h
+// sinks/rotating_file_sink.h
+// sinks/tcp_sink.h
+// spdlog.h
+#include <chrono>
+
+// details/file_helper-inl.h
+// details/os-inl.h
+// details/pattern_formatter-inl.h
+// details/periodic_worker.h
+// details/thread_pool.h
+// sinks/android_sink.h
+#include <thread>
+
+// async.h
+// details/backtracer.h
+// details/console_globals.h
+// details/mpmc_blocking_q.h
+// details/pattern_formatter-inl.h
+// details/periodic_worker.h
+// details/registry.h
+// sinks/android_sink.h
+// sinks/ansicolor_sink.h
+// sinks/basic_file_sink.h
+// sinks/daily_file_sink.h
+// sinks/dist_sink.h
+// sinks/dup_filter_sink.h
+// sinks/msvc_sink.h
+// sinks/null_sink.h
+// sinks/ostream_sink.h
+// sinks/ringbuffer_sink.h
+// sinks/rotating_file_sink-inl.h
+// sinks/rotating_file_sink.h
+// sinks/tcp_sink.h
+// sinks/win_eventlog_sink.h
+// sinks/wincolor_sink.h
+//
+// color_sinks.cpp
+// file_sinks.cpp
+// spdlog.cpp
+// stdout_sinks.cpp
+#include <mutex>
+
+// spdlog
+#include <spdlog/common.h>

cmake/spdlog.pc.in

@@ -1,6 +1,13 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-includedir=${prefix}/include
-
-Name: @PROJECT_NAME@
-Description: Super fast C++ logging library. 
-Version: @PROJECT_VERSION@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+includedir=${prefix}/include
+libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@
+
+Name: lib@PROJECT_NAME@
+Description: Fast C++ logging library.
+URL: https://github.com/gabime/@PROJECT_NAME@
+Version: @SPDLOG_VERSION@
+CFlags: -I${includedir} @PKG_CONFIG_DEFINES@
+Libs: -L${libdir} -lspdlog -pthread
+Requires: @PKG_CONFIG_REQUIRES@
+

cmake/spdlogCPack.cmake

@@ -0,0 +1,60 @@
+set(CPACK_GENERATOR "TGZ;ZIP" CACHE STRING "Semicolon separated list of generators")
+
+set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY 0)
+set(CPACK_INSTALL_CMAKE_PROJECTS "${CMAKE_BINARY_DIR}" "${PROJECT_NAME}" ALL .)
+
+set(CPACK_PROJECT_URL "https://github.com/gabime/spdlog")
+set(CPACK_PACKAGE_VENDOR "Gabi Melman")
+set(CPACK_PACKAGE_CONTACT "Gabi Melman <gmelman1@gmail.com>")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Fast C++ logging library")
+set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
+set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
+set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
+set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH})
+if(PROJECT_VERSION_TWEAK)
+    set(CPACK_PACKAGE_VERSION ${CPACK_PACKAGE_VERSION}.${PROJECT_VERSION_TWEAK})
+endif()
+set(CPACK_PACKAGE_RELOCATABLE ON CACHE BOOL "Build relocatable package")
+
+set(CPACK_RPM_PACKAGE_LICENSE "MIT")
+set(CPACK_RPM_PACKAGE_GROUP "Development/Libraries")
+set(CPACK_DEBIAN_PACKAGE_SECTION "libs")
+set(CPACK_RPM_PACKAGE_URL ${CPACK_PROJECT_URL})
+set(CPACK_DEBIAN_PACKAGE_HOMEPAGE ${CPACK_PROJECT_URL})
+set(CPACK_RPM_PACKAGE_DESCRIPTION "Very fast, header-only/compiled, C++ logging library.")
+set(CPACK_DEBIAN_PACKAGE_DESCRIPTION "Very fast, header-only/compiled, C++ logging library.")
+
+if(CPACK_PACKAGE_NAME)
+    set(CPACK_RPM_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")
+    set(CPACK_DEBIAN_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")
+else()
+    set(CPACK_RPM_FILE_NAME "${PROJECT_NAME}-${CPACK_PACKAGE_VERSION}")
+    set(CPACK_DEBIAN_FILE_NAME "${PROJECT_NAME}-${CPACK_PACKAGE_VERSION}")
+    set(CPACK_RPM_PACKAGE_NAME "${PROJECT_NAME}")
+    set(CPACK_DEBIAN_PACKAGE_NAME "${PROJECT_NAME}")
+endif()
+
+if(CPACK_RPM_PACKAGE_RELEASE)
+    set(CPACK_RPM_FILE_NAME "${CPACK_RPM_FILE_NAME}-${CPACK_RPM_PACKAGE_RELEASE}")
+endif()
+if(CPACK_DEBIAN_PACKAGE_RELEASE)
+    set(CPACK_DEBIAN_FILE_NAME "${CPACK_DEBIAN_FILE_NAME}-${CPACK_DEBIAN_PACKAGE_RELEASE}")
+endif()
+
+if(CPACK_RPM_PACKAGE_ARCHITECTURE)
+    set(CPACK_RPM_FILE_NAME "${CPACK_RPM_FILE_NAME}.${CPACK_RPM_PACKAGE_ARCHITECTURE}")
+endif()
+if(CPACK_DEBIAN_PACKAGE_ARCHITECTURE)
+    set(CPACK_DEBIAN_FILE_NAME "${CPACK_DEBIAN_FILE_NAME}.${CPACK_DEBIAN_PACKAGE_ARCHITECTURE}")
+endif()
+set(CPACK_RPM_FILE_NAME "${CPACK_RPM_FILE_NAME}.rpm")
+set(CPACK_DEBIAN_FILE_NAME "${CPACK_DEBIAN_FILE_NAME}.deb")
+
+if(NOT CPACK_PACKAGE_RELOCATABLE)
+    # Depend on pkgconfig rpm to create the system pkgconfig folder
+    set(CPACK_RPM_PACKAGE_REQUIRES pkgconfig)
+    set(CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION
+        "${CPACK_PACKAGING_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+endif()
+
+include(CPack)

cmake/spdlogConfig.cmake.in

@@ -0,0 +1,15 @@
+# Copyright(c) 2019 spdlog authors
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+find_package(Threads REQUIRED)
+
+set(SPDLOG_FMT_EXTERNAL @SPDLOG_FMT_EXTERNAL@)
+set(config_targets_file @config_targets_file@)
+
+if(SPDLOG_FMT_EXTERNAL)
+    include(CMakeFindDependencyMacro)
+    find_dependency(fmt CONFIG)
+endif()
+
+
+include("${CMAKE_CURRENT_LIST_DIR}/${config_targets_file}")

cmake/utils.cmake

@@ -0,0 +1,62 @@
+# Get spdlog version from include/spdlog/version.h and put it in SPDLOG_VERSION
+function(spdlog_extract_version)
+    file(READ "${CMAKE_CURRENT_LIST_DIR}/include/spdlog/version.h" file_contents)
+    string(REGEX MATCH "SPDLOG_VER_MAJOR ([0-9]+)" _ "${file_contents}")
+    if(NOT CMAKE_MATCH_COUNT EQUAL 1)
+        message(FATAL_ERROR "Could not extract major version number from spdlog/version.h")
+    endif()
+    set(ver_major ${CMAKE_MATCH_1})
+
+    string(REGEX MATCH "SPDLOG_VER_MINOR ([0-9]+)" _ "${file_contents}")
+    if(NOT CMAKE_MATCH_COUNT EQUAL 1)
+        message(FATAL_ERROR "Could not extract minor version number from spdlog/version.h")
+    endif()
+
+    set(ver_minor ${CMAKE_MATCH_1})
+    string(REGEX MATCH "SPDLOG_VER_PATCH ([0-9]+)" _ "${file_contents}")
+    if(NOT CMAKE_MATCH_COUNT EQUAL 1)
+        message(FATAL_ERROR "Could not extract patch version number from spdlog/version.h")
+    endif()
+    set(ver_patch ${CMAKE_MATCH_1})
+
+    set(SPDLOG_VERSION_MAJOR ${ver_major} PARENT_SCOPE)
+    set(SPDLOG_VERSION_MINOR ${ver_minor} PARENT_SCOPE)
+    set(SPDLOG_VERSION_PATCH ${ver_patch} PARENT_SCOPE)
+    set(SPDLOG_VERSION "${ver_major}.${ver_minor}.${ver_patch}" PARENT_SCOPE)
+endfunction()
+
+# Turn on warnings on the given target
+function(spdlog_enable_warnings target_name)
+    if(SPDLOG_BUILD_WARNINGS)
+        if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+            list(APPEND MSVC_OPTIONS "/W3")
+            if(MSVC_VERSION GREATER 1900) # Allow non fatal security warnings for msvc 2015
+                list(APPEND MSVC_OPTIONS "/WX")
+            endif()
+        endif()
+
+        target_compile_options(
+            ${target_name}
+            PRIVATE $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
+                    -Wall
+                    -Wextra
+                    -Wconversion
+                    -pedantic
+                    -Wfatal-errors>
+                    $<$<CXX_COMPILER_ID:MSVC>:${MSVC_OPTIONS}>)
+    endif()
+endfunction()
+
+# Enable address sanitizer (gcc/clang only)
+function(spdlog_enable_sanitizer target_name)
+    if(NOT CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+        message(FATAL_ERROR "Sanitizer supported only for gcc/clang")
+    endif()
+    message(STATUS "Address sanitizer enabled")
+    target_compile_options(${target_name} PRIVATE -fsanitize=address,undefined)
+    target_compile_options(${target_name} PRIVATE -fno-sanitize=signed-integer-overflow)
+    target_compile_options(${target_name} PRIVATE -fno-sanitize-recover=all)
+    target_compile_options(${target_name} PRIVATE -fno-omit-frame-pointer)
+    target_link_libraries(${target_name} PRIVATE -fsanitize=address,undefined -fuse-ld=gold)
+endfunction()
+

cmake/version.rc.in

@@ -0,0 +1,42 @@
+#define APSTUDIO_READONLY_SYMBOLS
+#include <windows.h>
+#undef APSTUDIO_READONLY_SYMBOLS
+
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION @SPDLOG_VERSION_MAJOR@,@SPDLOG_VERSION_MINOR@,@SPDLOG_VERSION_PATCH@,0
+ PRODUCTVERSION @SPDLOG_VERSION_MAJOR@,@SPDLOG_VERSION_MINOR@,@SPDLOG_VERSION_PATCH@,0
+ FILEFLAGSMASK 0x3fL
+#ifdef _DEBUG
+ FILEFLAGS 0x1L
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS 0x40004L
+ FILETYPE 0x2L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "FileDescription", "spdlog dll\0"
+            VALUE "FileVersion", "@SPDLOG_VERSION@.0\0"
+            VALUE "InternalName", "spdlog.dll\0"
+            VALUE "LegalCopyright", "Copyright (C) spdlog\0"
+            VALUE "ProductName", "spdlog\0"
+            VALUE "ProductVersion", "@SPDLOG_VERSION@.0\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+
+
+
+

example/CMakeLists.txt

@@ -1,49 +1,23 @@
-# *************************************************************************/
-# * 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})
-
-add_executable(multisink multisink.cpp)
-target_link_libraries(multisink 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) 2019 spdlog authors Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+cmake_minimum_required(VERSION 3.10)
+project(spdlog_examples CXX)
+
+if(NOT TARGET spdlog)
+    # Stand-alone build
+    find_package(spdlog REQUIRED)
+endif()
+
+# ---------------------------------------------------------------------------------------
+# Example of using pre-compiled library
+# ---------------------------------------------------------------------------------------
+add_executable(example example.cpp)
+target_link_libraries(example PRIVATE spdlog::spdlog)
+
+# ---------------------------------------------------------------------------------------
+# Example of using header-only library
+# ---------------------------------------------------------------------------------------
+if(SPDLOG_BUILD_EXAMPLE_HO)
+    add_executable(example_header_only example.cpp)
+    target_link_libraries(example_header_only PRIVATE spdlog::spdlog_header_only)
+endif()

example/Makefile

@@ -1,29 +0,0 @@
-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 +0,0 @@
-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 +0,0 @@
-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
-
-

example/bench.cpp

@@ -1,144 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-//
-// bench.cpp : spdlog benchmarks
-//
-#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;
-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 queue_size = 1048576;
-    int howmany = 1000000;
-    int threads = 10;
-    int file_size = 30 * 1024 * 1024;
-    int rotating_files = 5;
-
-    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";
-        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);
-        bench(howmany, rotating_st);
-        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st");
-        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" << endl;
-        cout << "*******************************************************************************\n";
-
-        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt", file_size, rotating_files);
-        bench_mt(howmany, rotating_mt, threads);
-
-
-        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt");
-        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 " << endl;
-        cout << "*******************************************************************************\n";
-
-
-        spdlog::set_async_mode(queue_size);
-
-        for(int i = 0; i < 3; ++i)
-        {
-            auto as = spdlog::daily_logger_st("as", "logs/daily_async");
-            bench_mt(howmany, as, threads);
-            spdlog::drop("as");
-        }
-    }
-    catch (std::exception &ex)
-    {
-        std::cerr << "Error: " << ex.what() << std::endl;
-        perror("Last error");
-        return EXIT_FAILURE;
-    }
-    return EXIT_SUCCESS;
-}
-
-
-void bench(int howmany, std::shared_ptr<spdlog::logger> log)
-{
-    cout << log->name() << "...\t\t" << flush;
-    auto start = system_clock::now();
-    for (auto i = 0; i < howmany; ++i)
-    {
-        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;
-}
-
-
-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};
-    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();
-    cout << format(int(howmany / delta_d)) << "/sec" << endl;
-}

example/example.cpp

@@ -1,163 +1,294 @@
 //
 // Copyright(c) 2015 Gabi Melman.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-//
+
 // spdlog usage example
-//
-//
-#include "spdlog/spdlog.h"
 
-#include <iostream>
-#include <memory>
+#include <cstdio>
 
+void load_levels_example();
+void stdout_logger_example();
+void basic_example();
+void rotating_example();
+void daily_example();
 void async_example();
-void syslog_example();
-void android_example();
+void binary_example();
+void stopwatch_example();
+void trace_example();
+void multi_sink_example();
 void user_defined_example();
 void err_handler_example();
+void syslog_example();
+void custom_flags_example();
 
-namespace spd = spdlog;
-int main(int, char*[])
+#include "spdlog/spdlog.h"
+#include "spdlog/cfg/env.h" // support for loading levels from the environment variable
+
+int main(int, char *[])
 {
+    // Log levels can be loaded from argv/env using "SPDLOG_LEVEL"
+    load_levels_example();
+
+    spdlog::info("Welcome to spdlog version {}.{}.{}  !", SPDLOG_VER_MAJOR, SPDLOG_VER_MINOR, SPDLOG_VER_PATCH);
+
+    spdlog::warn("Easy padding in numbers like {:08d}", 12);
+    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+    spdlog::info("Support for floats {:03.2f}", 1.23456);
+    spdlog::info("Positional args are {1} {0}..", "too", "supported");
+    spdlog::info("{:>8} aligned, {:<8} aligned", "right", "left");
+
+    // Runtime log levels
+    spdlog::set_level(spdlog::level::info); // Set global log level to info
+    spdlog::debug("This message should not be displayed!");
+    spdlog::set_level(spdlog::level::trace); // Set specific logger's log level
+    spdlog::debug("This message should be displayed..");
+
+    // Customize msg format for all loggers
+    spdlog::set_pattern("[%H:%M:%S %z] [%^%L%$] [thread %t] %v");
+    spdlog::info("This an info message with custom format");
+    spdlog::set_pattern("%+"); // back to default format
+    spdlog::set_level(spdlog::level::info);
+
+    // Backtrace support
+    // Loggers can store in a ring buffer all messages (including debug/trace) for later inspection.
+    // When needed, call dump_backtrace() to see what happened:
+    spdlog::enable_backtrace(10); // create ring buffer with capacity of 10  messages
+    for (int i = 0; i < 100; i++)
+    {
+        spdlog::debug("Backtrace message {}", i); // not logged..
+    }
+    // e.g. if some error happened:
+    spdlog::dump_backtrace(); // log them now!
+
     try
     {
-        // Multithreaded color console
-        auto console = spd::stdout_logger_mt("console", true);
-        console->info("Welcome to spdlog!");
-        console->error("An error message example {}..", 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");
-        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);
-
-        // 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);
-        // 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");
-
-        // Compile time debug or trace macros.
-        // Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef 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..
+        stdout_logger_example();
+        basic_example();
+        rotating_example();
+        daily_example();
         async_example();
-
-        // syslog example. linux/osx only
-        syslog_example();
-
-        // android example. compile with NDK
-        android_example();
-
-        // Log user-defined types example
+        binary_example();
+        multi_sink_example();
         user_defined_example();
-
-        // Change default log error handler
         err_handler_example();
+        trace_example();
+        stopwatch_example();
+        custom_flags_example();
 
-        // Apply a function on all registered loggers
-        spd::apply_all([&](std::shared_ptr<spdlog::logger> l)
-        {
-            l->info("End of example.");
-        });
+        // Flush all *registered* loggers using a worker thread every 3 seconds.
+        // note: registered loggers *must* be thread safe for this to work correctly!
+        spdlog::flush_every(std::chrono::seconds(3));
 
-        // Release and close all loggers
-        spdlog::drop_all();
+        // Apply some function on all registered loggers
+        spdlog::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
+
+        // Release all spdlog resources, and drop all loggers in the registry.
+        // This is optional (only mandatory if using windows + async log).
+        spdlog::shutdown();
     }
-    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex& ex)
+
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging).
+    catch (const spdlog::spdlog_ex &ex)
     {
-        std::cout << "Log init failed: " << ex.what() << std::endl;
+        std::printf("Log initialization failed: %s\n", ex.what());
         return 1;
     }
 }
 
+#include "spdlog/sinks/stdout_color_sinks.h"
+// or #include "spdlog/sinks/stdout_sinks.h" if no colors needed.
+void stdout_logger_example()
+{
+    // Create color multi threaded logger.
+    auto console = spdlog::stdout_color_mt("console");
+    // or for stderr:
+    // auto console = spdlog::stderr_color_mt("error-logger");
+}
+
+#include "spdlog/sinks/basic_file_sink.h"
+void basic_example()
+{
+    // Create basic file logger (not rotated).
+    auto my_logger = spdlog::basic_logger_mt("file_logger", "logs/basic-log.txt");
+}
+
+#include "spdlog/sinks/rotating_file_sink.h"
+void rotating_example()
+{
+    // Create a file rotating logger with 5mb size max and 3 rotated files.
+    auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+}
+
+#include "spdlog/sinks/daily_file_sink.h"
+void daily_example()
+{
+    // Create a daily logger - a new file is created every day on 2:30am.
+    auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+}
+
+#include "spdlog/cfg/env.h"
+void load_levels_example()
+{
+    // Set the log level to "info" and mylogger to to "trace":
+    // SPDLOG_LEVEL=info,mylogger=trace && ./example
+    spdlog::cfg::load_env_levels();
+    // or from command line:
+    // ./example SPDLOG_LEVEL=info,mylogger=trace
+    // #include "spdlog/cfg/argv.h" // for loading levels from argv
+    // spdlog::cfg::load_argv_levels(args, argv);
+}
+
+#include "spdlog/async.h"
 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");
+    // Default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(32768, 1); // queue with max 32k items 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");
 
-    for (int i = 0; i < 100; ++i)
+    for (int i = 1; i < 101; ++i)
+    {
         async_file->info("Async message #{}", i);
+    }
 }
 
-//syslog example (linux/osx/freebsd)
-void syslog_example()
+// Log binary data as hex.
+// Many types of std::container<char> types can be used.
+// Iterator ranges are supported too.
+// Format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+void binary_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
+    std::vector<char> buf(80);
+    for (int i = 0; i < 80; i++)
+    {
+        buf.push_back(static_cast<char>(i & 0xff));
+    }
+    spdlog::info("Binary example: {}", spdlog::to_hex(buf));
+    spdlog::info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
+    // logger->info("hexdump style: {:a}", spdlog::to_hex(buf));
+    // logger->info("hexdump style, 20 chars per line {:a}", spdlog::to_hex(buf, 20));
 }
 
-// Android example
-void android_example()
+// Compile time log levels.
+// define SPDLOG_ACTIVE_LEVEL to required level (e.g. SPDLOG_LEVEL_TRACE)
+void trace_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
+    // trace from default logger
+    SPDLOG_TRACE("Some trace message.. {} ,{}", 1, 3.23);
+    // debug from default logger
+    SPDLOG_DEBUG("Some debug message.. {} ,{}", 1, 3.23);
+
+    // trace from logger object
+    auto logger = spdlog::get("file_logger");
+    SPDLOG_LOGGER_TRACE(logger, "another trace message");
 }
 
-// user defined types logging by implementing operator<<
+// stopwatch example
+#include "spdlog/stopwatch.h"
+#include <thread>
+void stopwatch_example()
+{
+    spdlog::stopwatch sw;
+    std::this_thread::sleep_for(std::chrono::milliseconds(123));
+    spdlog::info("Stopwatch: {} seconds", sw);
+}
+
+// A logger with multiple sinks (stdout and file) - each with a different format and log level.
+void multi_sink_example()
+{
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    console_sink->set_level(spdlog::level::warn);
+    console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
+
+    auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
+    file_sink->set_level(spdlog::level::trace);
+
+    spdlog::logger logger("multi_sink", {console_sink, file_sink});
+    logger.set_level(spdlog::level::debug);
+    logger.warn("this should appear in both console and file");
+    logger.info("this message should not appear in the console, only in the file");
+}
+
+// User defined types logging by implementing operator<<
+#include "spdlog/fmt/ostr.h" // must be included
 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
 void user_defined_example()
 {
-    spd::get("console")->info("user defined type: {}", my_type { 14 });
+    spdlog::info("user defined type: {}", my_type{14});
 }
 
-//
-//custom error handler
-//
+// Custom error handler. Will be triggered on log failure.
 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);
+    // can be set globally or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { printf("*** Custom log error handler: %s ***\n", msg.c_str()); });
+}
+
+// syslog example (linux/osx/freebsd)
+#ifndef _WIN32
+#include "spdlog/sinks/syslog_sink.h"
+void syslog_example()
+{
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+}
+#endif
+
+// Android example.
+#if defined(__ANDROID__)
+#include "spdlog/sinks/android_sink.h"
+void android_example()
+{
+    std::string tag = "spdlog-android";
+    auto android_logger = spdlog::android_logger_mt("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+}
+#endif
+
+// Log patterns can contain custom flags.
+// this will add custom flag '%*' which will be bound to a <my_formatter_flag> instance
+#include "spdlog/pattern_formatter.h"
+class my_formatter_flag : public spdlog::custom_flag_formatter
+{
+public:
+    void format(const spdlog::details::log_msg &, const std::tm &, spdlog::memory_buf_t &dest) override
+    {
+        std::string some_txt = "custom-flag";
+        dest.append(some_txt.data(), some_txt.data() + some_txt.size());
+    }
+
+    std::unique_ptr<custom_flag_formatter> clone() const override
+    {
+        return spdlog::details::make_unique<my_formatter_flag>();
+    }
+};
+
+void custom_flags_example()
+{
+
+    using spdlog::details::make_unique; // for pre c++14
+    auto formatter = make_unique<spdlog::pattern_formatter>();
+    formatter->add_flag<my_formatter_flag>('*').set_pattern("[%n] [%*] [%^%l%$] %v");
+    spdlog::set_formatter(std::move(formatter));
 }

example/example.sln

@@ -1,26 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.25420.1
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example", "example.vcxproj", "{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Debug|x64 = Debug|x64
-		Release|Win32 = Release|Win32
-		Release|x64 = Release|x64
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Debug|Win32.ActiveCfg = Debug|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Debug|Win32.Build.0 = Debug|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Debug|x64.ActiveCfg = Debug|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|Win32.ActiveCfg = Release|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|Win32.Build.0 = Release|Win32
-		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|x64.ActiveCfg = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal

example/example.vcxproj

@@ -1,125 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <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>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <LinkIncremental>true</LinkIncremental>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <LinkIncremental>false</LinkIncremental>
-  </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <WarningLevel>Level3</WarningLevel>
-      <Optimization>Disabled</Optimization>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PrecompiledHeaderFile />
-      <PrecompiledHeaderOutputFile />
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
-      <WarningLevel>Level3</WarningLevel>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
-      <Optimization>MaxSpeed</Optimization>
-      <FunctionLevelLinking>true</FunctionLevelLinking>
-      <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <AdditionalIncludeDirectories>..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PrecompiledHeaderFile />
-      <PrecompiledHeaderOutputFile />
-    </ClCompile>
-    <Link>
-      <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-      <AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
-    </Link>
-  </ItemDefinitionGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  </ImportGroup>
-</Project>

example/jni/Android.mk

@@ -1,15 +0,0 @@
-# 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

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

example/jni/example.cpp

@@ -1 +0,0 @@
-../example.cpp

example/logs/.gitignore

@@ -1 +0,0 @@
-*.txt

example/multisink.cpp

@@ -1,47 +0,0 @@
-#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

@@ -1,35 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include <sstream>
-#include <iomanip>
-#include <locale>
-
-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();
-}
-
-}

include/spdlog/async.h

@@ -0,0 +1,93 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+//
+// Async logging using global thread pool
+// All loggers created here share same global thread pool.
+// Each log message is pushed to a queue along with a shared pointer to the
+// logger.
+// If a logger deleted while having pending messages in the queue, it's actual
+// destruction will defer
+// until all its messages are processed by the thread pool.
+// This is because each message in the queue holds a shared_ptr to the
+// originating logger.
+
+#include <spdlog/async_logger.h>
+#include <spdlog/details/registry.h>
+#include <spdlog/details/thread_pool.h>
+
+#include <memory>
+#include <mutex>
+#include <functional>
+
+namespace spdlog {
+
+namespace details {
+static const size_t default_async_q_size = 8192;
+}
+
+// async logger factory - creates async loggers backed with thread pool.
+// if a global thread pool doesn't already exist, create it with default queue
+// size of 8192 items and single thread.
+template<async_overflow_policy OverflowPolicy = async_overflow_policy::block>
+struct async_factory_impl
+{
+    template<typename Sink, typename... SinkArgs>
+    static std::shared_ptr<async_logger> create(std::string logger_name, SinkArgs &&...args)
+    {
+        auto &registry_inst = details::registry::instance();
+
+        // create global thread pool if not already exists..
+
+        auto &mutex = registry_inst.tp_mutex();
+        std::lock_guard<std::recursive_mutex> tp_lock(mutex);
+        auto tp = registry_inst.get_tp();
+        if (tp == nullptr)
+        {
+            tp = std::make_shared<details::thread_pool>(details::default_async_q_size, 1);
+            registry_inst.set_tp(tp);
+        }
+
+        auto sink = std::make_shared<Sink>(std::forward<SinkArgs>(args)...);
+        auto new_logger = std::make_shared<async_logger>(std::move(logger_name), std::move(sink), std::move(tp), OverflowPolicy);
+        registry_inst.initialize_logger(new_logger);
+        return new_logger;
+    }
+};
+
+using async_factory = async_factory_impl<async_overflow_policy::block>;
+using async_factory_nonblock = async_factory_impl<async_overflow_policy::overrun_oldest>;
+
+template<typename Sink, typename... SinkArgs>
+inline std::shared_ptr<spdlog::logger> create_async(std::string logger_name, SinkArgs &&...sink_args)
+{
+    return async_factory::create<Sink>(std::move(logger_name), std::forward<SinkArgs>(sink_args)...);
+}
+
+template<typename Sink, typename... SinkArgs>
+inline std::shared_ptr<spdlog::logger> create_async_nb(std::string logger_name, SinkArgs &&...sink_args)
+{
+    return async_factory_nonblock::create<Sink>(std::move(logger_name), std::forward<SinkArgs>(sink_args)...);
+}
+
+// set global thread pool.
+inline void init_thread_pool(size_t q_size, size_t thread_count, std::function<void()> on_thread_start)
+{
+    auto tp = std::make_shared<details::thread_pool>(q_size, thread_count, on_thread_start);
+    details::registry::instance().set_tp(std::move(tp));
+}
+
+// set global thread pool.
+inline void init_thread_pool(size_t q_size, size_t thread_count)
+{
+    init_thread_pool(q_size, thread_count, [] {});
+}
+
+// get the global thread pool.
+inline std::shared_ptr<spdlog::details::thread_pool> thread_pool()
+{
+    return details::registry::instance().get_tp();
+}
+} // namespace spdlog

include/spdlog/async_logger-inl.h

@@ -0,0 +1,92 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/async_logger.h>
+#endif
+
+#include <spdlog/sinks/sink.h>
+#include <spdlog/details/thread_pool.h>
+
+#include <memory>
+#include <string>
+
+SPDLOG_INLINE spdlog::async_logger::async_logger(
+    std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : async_logger(std::move(logger_name), sinks_list.begin(), sinks_list.end(), std::move(tp), overflow_policy)
+{}
+
+SPDLOG_INLINE spdlog::async_logger::async_logger(
+    std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : async_logger(std::move(logger_name), {std::move(single_sink)}, std::move(tp), overflow_policy)
+{}
+
+// send the log message to the thread pool
+SPDLOG_INLINE void spdlog::async_logger::sink_it_(const details::log_msg &msg)
+{
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        pool_ptr->post_log(shared_from_this(), msg, overflow_policy_);
+    }
+    else
+    {
+        throw_spdlog_ex("async log: thread pool doesn't exist anymore");
+    }
+}
+
+// send flush request to the thread pool
+SPDLOG_INLINE void spdlog::async_logger::flush_()
+{
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        pool_ptr->post_flush(shared_from_this(), overflow_policy_);
+    }
+    else
+    {
+        throw_spdlog_ex("async flush: thread pool doesn't exist anymore");
+    }
+}
+
+//
+// backend functions - called from the thread pool to do the actual job
+//
+SPDLOG_INLINE void spdlog::async_logger::backend_sink_it_(const details::log_msg &msg)
+{
+    for (auto &sink : sinks_)
+    {
+        if (sink->should_log(msg.level))
+        {
+            SPDLOG_TRY
+            {
+                sink->log(msg);
+            }
+            SPDLOG_LOGGER_CATCH()
+        }
+    }
+
+    if (should_flush_(msg))
+    {
+        backend_flush_();
+    }
+}
+
+SPDLOG_INLINE void spdlog::async_logger::backend_flush_()
+{
+    for (auto &sink : sinks_)
+    {
+        SPDLOG_TRY
+        {
+            sink->flush();
+        }
+        SPDLOG_LOGGER_CATCH()
+    }
+}
+
+SPDLOG_INLINE std::shared_ptr<spdlog::logger> spdlog::async_logger::clone(std::string new_name)
+{
+    auto cloned = std::make_shared<spdlog::async_logger>(*this);
+    cloned->name_ = std::move(new_name);
+    return cloned;
+}

include/spdlog/async_logger.h

@@ -1,77 +1,68 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-// Very fast asynchronous logger (millions of logs per second on an average desktop)
-// Uses pre allocated lockfree queue for maximum throughput even under large number of threads.
+// Fast asynchronous logger.
+// Uses pre allocated queue.
 // Creates a single back thread to pop messages from the queue and log them.
 //
 // Upon each log write the logger:
 //    1. Checks if its log level is enough to log the message
-//    2. Push a new copy of the message to a queue (or block the caller until space is available in the queue)
-//    3. will throw spdlog_ex upon log exceptions
-// Upon destruction, logs all remaining messages in the queue before destructing..
+//    2. Push a new copy of the message to a queue (or block the caller until
+//    space is available in the queue)
+// Upon destruction, logs all remaining messages in the queue before
+// destructing..
 
-#include <spdlog/common.h>
 #include <spdlog/logger.h>
 
-#include <chrono>
-#include <functional>
-#include <string>
-#include <memory>
+namespace spdlog {
 
-namespace spdlog
+// Async overflow policy - block by default.
+enum class async_overflow_policy
 {
+    block,         // Block until message can be enqueued
+    overrun_oldest // Discard oldest message in the queue if full when trying to
+                   // add new item.
+};
 
-namespace details
-{
-class async_log_helper;
+namespace details {
+class thread_pool;
 }
 
-class async_logger :public logger
+class SPDLOG_API async_logger final : public std::enable_shared_from_this<async_logger>, public logger
 {
+    friend class details::thread_pool;
+
 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);
+    template<typename It>
+    async_logger(std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block)
+        : logger(std::move(logger_name), begin, end)
+        , thread_pool_(std::move(tp))
+        , overflow_policy_(overflow_policy)
+    {}
 
-    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(std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
 
-    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(std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
+
+    std::shared_ptr<logger> clone(std::string new_name) override;
 
-    //Wait for the queue to be empty, and flush synchronously
-    //Warning: this can potentialy last forever as we wait it to complete
-    void flush() override;
 protected:
-    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 sink_it_(const details::log_msg &msg) override;
+    void flush_() override;
+    void backend_sink_it_(const details::log_msg &incoming_log_msg);
+    void backend_flush_();
 
 private:
-    std::unique_ptr<details::async_log_helper> _async_log_helper;
+    std::weak_ptr<details::thread_pool> thread_pool_;
+    async_overflow_policy overflow_policy_;
 };
-}
+} // namespace spdlog
 
-
-#include <spdlog/details/async_logger_impl.h>
+#ifdef SPDLOG_HEADER_ONLY
+#include "async_logger-inl.h"
+#endif

include/spdlog/cfg/argv.h

@@ -0,0 +1,44 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+#include <spdlog/cfg/helpers.h>
+#include <spdlog/details/registry.h>
+
+//
+// Init log levels using each argv entry that starts with "SPDLOG_LEVEL="
+//
+// set all loggers to debug level:
+// example.exe "SPDLOG_LEVEL=debug"
+
+// set logger1 to trace level
+// example.exe "SPDLOG_LEVEL=logger1=trace"
+
+// turn off all logging except for logger1 and logger2:
+// example.exe "SPDLOG_LEVEL=off,logger1=debug,logger2=info"
+
+namespace spdlog {
+namespace cfg {
+
+// search for SPDLOG_LEVEL= in the args and use it to init the levels
+inline void load_argv_levels(int argc, const char **argv)
+{
+    const std::string spdlog_level_prefix = "SPDLOG_LEVEL=";
+    for (int i = 1; i < argc; i++)
+    {
+        std::string arg = argv[i];
+        if (arg.find(spdlog_level_prefix) == 0)
+        {
+            auto levels_string = arg.substr(spdlog_level_prefix.size());
+            helpers::load_levels(levels_string);
+        }
+    }
+}
+
+inline void load_argv_levels(int argc, char **argv)
+{
+    load_argv_levels(argc, const_cast<const char **>(argv));
+}
+
+} // namespace cfg
+} // namespace spdlog

include/spdlog/cfg/env.h

@@ -0,0 +1,38 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+#include <spdlog/cfg/helpers.h>
+#include <spdlog/details/registry.h>
+#include <spdlog/details/os.h>
+
+//
+// Init levels and patterns from env variables SPDLOG_LEVEL
+// Inspired from Rust's "env_logger" crate (https://crates.io/crates/env_logger).
+// Note - fallback to "info" level on unrecognized levels
+//
+// Examples:
+//
+// set global level to debug:
+// export SPDLOG_LEVEL=debug
+//
+// turn off all logging except for logger1:
+// export SPDLOG_LEVEL="*=off,logger1=debug"
+//
+
+// turn off all logging except for logger1 and logger2:
+// export SPDLOG_LEVEL="off,logger1=debug,logger2=info"
+
+namespace spdlog {
+namespace cfg {
+inline void load_env_levels()
+{
+    auto env_val = details::os::getenv("SPDLOG_LEVEL");
+    if (!env_val.empty())
+    {
+        helpers::load_levels(env_val);
+    }
+}
+
+} // namespace cfg
+} // namespace spdlog

include/spdlog/cfg/helpers-inl.h

@@ -0,0 +1,120 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/cfg/helpers.h>
+#endif
+
+#include <spdlog/spdlog.h>
+#include <spdlog/details/os.h>
+#include <spdlog/details/registry.h>
+
+#include <algorithm>
+#include <string>
+#include <utility>
+#include <sstream>
+
+namespace spdlog {
+namespace cfg {
+namespace helpers {
+
+// inplace convert to lowercase
+inline std::string &to_lower_(std::string &str)
+{
+    std::transform(
+        str.begin(), str.end(), str.begin(), [](char ch) { return static_cast<char>((ch >= 'A' && ch <= 'Z') ? ch + ('a' - 'A') : ch); });
+    return str;
+}
+
+// inplace trim spaces
+inline std::string &trim_(std::string &str)
+{
+    const char *spaces = " \n\r\t";
+    str.erase(str.find_last_not_of(spaces) + 1);
+    str.erase(0, str.find_first_not_of(spaces));
+    return str;
+}
+
+// return (name,value) trimmed pair from given "name=value" string.
+// return empty string on missing parts
+// "key=val" => ("key", "val")
+// " key  =  val " => ("key", "val")
+// "key=" => ("key", "")
+// "val" => ("", "val")
+
+inline std::pair<std::string, std::string> extract_kv_(char sep, const std::string &str)
+{
+    auto n = str.find(sep);
+    std::string k, v;
+    if (n == std::string::npos)
+    {
+        v = str;
+    }
+    else
+    {
+        k = str.substr(0, n);
+        v = str.substr(n + 1);
+    }
+    return std::make_pair(trim_(k), trim_(v));
+}
+
+// return vector of key/value pairs from sequence of "K1=V1,K2=V2,.."
+// "a=AAA,b=BBB,c=CCC,.." => {("a","AAA"),("b","BBB"),("c", "CCC"),...}
+inline std::unordered_map<std::string, std::string> extract_key_vals_(const std::string &str)
+{
+    std::string token;
+    std::istringstream token_stream(str);
+    std::unordered_map<std::string, std::string> rv{};
+    while (std::getline(token_stream, token, ','))
+    {
+        if (token.empty())
+        {
+            continue;
+        }
+        auto kv = extract_kv_('=', token);
+        rv[kv.first] = kv.second;
+    }
+    return rv;
+}
+
+SPDLOG_INLINE void load_levels(const std::string &input)
+{
+    if (input.empty() || input.size() > 512)
+    {
+        return;
+    }
+
+    auto key_vals = extract_key_vals_(input);
+    std::unordered_map<std::string, level::level_enum> levels;
+    level::level_enum global_level = level::info;
+    bool global_level_found = false;
+
+    for (auto &name_level : key_vals)
+    {
+        auto &logger_name = name_level.first;
+        auto level_name = to_lower_(name_level.second);
+        auto level = level::from_str(level_name);
+        // ignore unrecognized level names
+        if (level == level::off && level_name != "off")
+        {
+            continue;
+        }
+        if (logger_name.empty()) // no logger name indicate global level
+        {
+            global_level_found = true;
+            global_level = level;
+        }
+        else
+        {
+            levels[logger_name] = level;
+        }
+    }
+
+    details::registry::instance().set_levels(std::move(levels), global_level_found ? &global_level : nullptr);
+}
+
+} // namespace helpers
+} // namespace cfg
+} // namespace spdlog

include/spdlog/cfg/helpers.h

@@ -0,0 +1,29 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/common.h>
+#include <unordered_map>
+
+namespace spdlog {
+namespace cfg {
+namespace helpers {
+//
+// Init levels from given string
+//
+// Examples:
+//
+// set global level to debug: "debug"
+// turn off all logging except for logger1: "off,logger1=debug"
+// turn off all logging except for logger1 and logger2: "off,logger1=debug,logger2=info"
+//
+SPDLOG_API void load_levels(const std::string &txt);
+} // namespace helpers
+
+} // namespace cfg
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "helpers-inl.h"
+#endif // SPDLOG_HEADER_ONLY

include/spdlog/common-inl.h

@@ -0,0 +1,82 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/common.h>
+#endif
+
+namespace spdlog {
+namespace level {
+
+static string_view_t level_string_views[] SPDLOG_LEVEL_NAMES;
+
+static const char *short_level_names[] SPDLOG_SHORT_LEVEL_NAMES;
+
+SPDLOG_INLINE const string_view_t &to_string_view(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
+{
+    return level_string_views[l];
+}
+
+SPDLOG_INLINE void set_string_view(spdlog::level::level_enum l, const string_view_t &s) SPDLOG_NOEXCEPT
+{
+    level_string_views[l] = s;
+}
+
+SPDLOG_INLINE const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
+{
+    return short_level_names[l];
+}
+
+SPDLOG_INLINE spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT
+{
+    int level = 0;
+    for (const auto &level_str : level_string_views)
+    {
+        if (level_str == name)
+        {
+            return static_cast<level::level_enum>(level);
+        }
+        level++;
+    }
+    // check also for "warn" and "err" before giving up..
+    if (name == "warn")
+    {
+        return level::warn;
+    }
+    if (name == "err")
+    {
+        return level::err;
+    }
+    return level::off;
+}
+} // namespace level
+
+SPDLOG_INLINE spdlog_ex::spdlog_ex(std::string msg)
+    : msg_(std::move(msg))
+{}
+
+SPDLOG_INLINE spdlog_ex::spdlog_ex(const std::string &msg, int last_errno)
+{
+    memory_buf_t outbuf;
+    fmt::format_system_error(outbuf, last_errno, msg);
+    msg_ = fmt::to_string(outbuf);
+}
+
+SPDLOG_INLINE const char *spdlog_ex::what() const SPDLOG_NOEXCEPT
+{
+    return msg_.c_str();
+}
+
+SPDLOG_INLINE void throw_spdlog_ex(const std::string &msg, int last_errno)
+{
+    SPDLOG_THROW(spdlog_ex(msg, last_errno));
+}
+
+SPDLOG_INLINE void throw_spdlog_ex(std::string msg)
+{
+    SPDLOG_THROW(spdlog_ex(std::move(msg)));
+}
+
+} // namespace spdlog

include/spdlog/common.h

@@ -1,143 +1,249 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-#include <string>
-#include <initializer_list>
-#include <chrono>
-#include <memory>
-#include <atomic>
-#include <exception>
-#include<functional>
-
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-#include <codecvt>
-#include <locale>
-#endif
-
+#include <spdlog/tweakme.h>
 #include <spdlog/details/null_mutex.h>
 
-//visual studio upto 2013 does not support noexcept nor constexpr
+#include <atomic>
+#include <chrono>
+#include <initializer_list>
+#include <memory>
+#include <exception>
+#include <string>
+#include <type_traits>
+#include <functional>
+
+#ifdef SPDLOG_COMPILED_LIB
+#undef SPDLOG_HEADER_ONLY
+#if defined(_WIN32) && defined(SPDLOG_SHARED_LIB)
+#ifdef spdlog_EXPORTS
+#define SPDLOG_API __declspec(dllexport)
+#else
+#define SPDLOG_API __declspec(dllimport)
+#endif
+#else // !defined(_WIN32) || !defined(SPDLOG_SHARED_LIB)
+#define SPDLOG_API
+#endif
+#define SPDLOG_INLINE
+#else // !defined(SPDLOG_COMPILED_LIB)
+#define SPDLOG_API
+#define SPDLOG_HEADER_ONLY
+#define SPDLOG_INLINE inline
+#endif // #ifdef SPDLOG_COMPILED_LIB
+
+#include <spdlog/fmt/fmt.h>
+
+// visual studio upto 2013 does not support noexcept nor constexpr
 #if defined(_MSC_VER) && (_MSC_VER < 1900)
-#define SPDLOG_NOEXCEPT throw()
+#define SPDLOG_NOEXCEPT _NOEXCEPT
 #define SPDLOG_CONSTEXPR
 #else
 #define SPDLOG_NOEXCEPT noexcept
 #define SPDLOG_CONSTEXPR constexpr
 #endif
 
-#if defined(__GNUC__)  || defined(__clang__)
-#define DEPRECATED __attribute__((deprecated))
+#if defined(__GNUC__) || defined(__clang__)
+#define SPDLOG_DEPRECATED __attribute__((deprecated))
 #elif defined(_MSC_VER)
-#define DEPRECATED __declspec(deprecated)
+#define SPDLOG_DEPRECATED __declspec(deprecated)
 #else
-#define DEPRECATED
+#define SPDLOG_DEPRECATED
 #endif
 
+// disable thread local on msvc 2013
+#ifndef SPDLOG_NO_TLS
+#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt)
+#define SPDLOG_NO_TLS 1
+#endif
+#endif
 
-#include <spdlog/fmt/fmt.h>
+#ifndef SPDLOG_FUNCTION
+#define SPDLOG_FUNCTION static_cast<const char *>(__FUNCTION__)
+#endif
 
-namespace spdlog
-{
+#ifdef SPDLOG_NO_EXCEPTIONS
+#define SPDLOG_TRY
+#define SPDLOG_THROW(ex)                                                                                                                   \
+    do                                                                                                                                     \
+    {                                                                                                                                      \
+        printf("spdlog fatal error: %s\n", ex.what());                                                                                     \
+        std::abort();                                                                                                                      \
+    } while (0)
+#define SPDLOG_CATCH_ALL()
+#else
+#define SPDLOG_TRY try
+#define SPDLOG_THROW(ex) throw(ex)
+#define SPDLOG_CATCH_ALL() catch (...)
+#endif
+
+namespace spdlog {
 
 class formatter;
 
-namespace sinks
-{
+namespace sinks {
 class sink;
 }
 
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+using filename_t = std::wstring;
+// allow macro expansion to occur in SPDLOG_FILENAME_T
+#define SPDLOG_FILENAME_T_INNER(s) L##s
+#define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
+#else
+using filename_t = std::string;
+#define SPDLOG_FILENAME_T(s) s
+#endif
+
 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 formatter_ptr = std::shared_ptr<spdlog::formatter>;
+using sink_ptr = std::shared_ptr<sinks::sink>;
+using sinks_init_list = std::initializer_list<sink_ptr>;
+using err_handler = std::function<void(const std::string &err_msg)>;
+using string_view_t = fmt::basic_string_view<char>;
+using wstring_view_t = fmt::basic_string_view<wchar_t>;
+using memory_buf_t = fmt::basic_memory_buffer<char, 250>;
+using wmemory_buf_t = fmt::basic_memory_buffer<wchar_t, 250>;
+
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+#ifndef _WIN32
+#error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
+#else
+template<typename T>
+struct is_convertible_to_wstring_view : std::is_convertible<T, wstring_view_t>
+{};
+#endif // _WIN32
+#else
+template<typename>
+struct is_convertible_to_wstring_view : std::false_type
+{};
+#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
 #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)>;
+#define SPDLOG_LEVEL_TRACE 0
+#define SPDLOG_LEVEL_DEBUG 1
+#define SPDLOG_LEVEL_INFO 2
+#define SPDLOG_LEVEL_WARN 3
+#define SPDLOG_LEVEL_ERROR 4
+#define SPDLOG_LEVEL_CRITICAL 5
+#define SPDLOG_LEVEL_OFF 6
 
-//Log level enum
-namespace level
+#if !defined(SPDLOG_ACTIVE_LEVEL)
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_INFO
+#endif
+
+// Log level enum
+namespace level {
+enum level_enum
 {
-typedef enum
-{
-    trace = 0,
-    debug = 1,
-    info = 2,
-    warn = 3,
-    err = 4,
-    critical = 5,
-    off = 6
-} level_enum;
-
-static const char* level_names[] { "trace", "debug", "info",  "warning", "error", "critical", "off" };
-
-static const char* short_level_names[] { "T", "D", "I", "W", "E", "C", "O" };
-
-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)
-{
-    return short_level_names[l];
-}
-} //level
-
-
-//
-// Async overflow policy - block by default.
-//
-enum class async_overflow_policy
-{
-    block_retry, // Block / yield / sleep until message can be enqueued
-    discard_log_msg // Discard the message it enqueue fails
+    trace = SPDLOG_LEVEL_TRACE,
+    debug = SPDLOG_LEVEL_DEBUG,
+    info = SPDLOG_LEVEL_INFO,
+    warn = SPDLOG_LEVEL_WARN,
+    err = SPDLOG_LEVEL_ERROR,
+    critical = SPDLOG_LEVEL_CRITICAL,
+    off = SPDLOG_LEVEL_OFF,
+    n_levels
 };
 
+#if !defined(SPDLOG_LEVEL_NAMES)
+#define SPDLOG_LEVEL_NAMES                                                                                                                 \
+    {                                                                                                                                      \
+        "trace", "debug", "info", "warning", "error", "critical", "off"                                                                    \
+    }
+#endif
+
+#if !defined(SPDLOG_SHORT_LEVEL_NAMES)
+
+#define SPDLOG_SHORT_LEVEL_NAMES                                                                                                           \
+    {                                                                                                                                      \
+        "T", "D", "I", "W", "E", "C", "O"                                                                                                  \
+    }
+#endif
+
+SPDLOG_API const string_view_t &to_string_view(spdlog::level::level_enum l) SPDLOG_NOEXCEPT;
+SPDLOG_API void set_string_view(spdlog::level::level_enum l, const string_view_t &s) SPDLOG_NOEXCEPT;
+SPDLOG_API const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT;
+SPDLOG_API spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT;
+
+} // namespace level
+
+//
+// Color mode used by sinks with color support.
+//
+enum class color_mode
+{
+    always,
+    automatic,
+    never
+};
+
+//
+// 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_API spdlog_ex : public std::exception
 {
 public:
-    spdlog_ex(const std::string& msg):_msg(msg)
-    {}
-    spdlog_ex(const std::string& msg, int last_errno)
-    {
-        _msg = msg + ": " + details::os::errno_str(last_errno);
-    }
-    const char* what() const SPDLOG_NOEXCEPT override
-    {
-        return _msg.c_str();
-    }
-private:
-    std::string _msg;
+    explicit spdlog_ex(std::string msg);
+    spdlog_ex(const std::string &msg, int last_errno);
+    const char *what() const SPDLOG_NOEXCEPT override;
 
+private:
+    std::string msg_;
 };
 
-//
-// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
-//
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-using filename_t = std::wstring;
+[[noreturn]] SPDLOG_API void throw_spdlog_ex(const std::string &msg, int last_errno);
+[[noreturn]] SPDLOG_API void throw_spdlog_ex(std::string msg);
+
+struct source_loc
+{
+    SPDLOG_CONSTEXPR source_loc() = default;
+    SPDLOG_CONSTEXPR source_loc(const char *filename_in, int line_in, const char *funcname_in)
+        : filename{filename_in}
+        , line{line_in}
+        , funcname{funcname_in}
+    {}
+
+    SPDLOG_CONSTEXPR bool empty() const SPDLOG_NOEXCEPT
+    {
+        return line == 0;
+    }
+    const char *filename{nullptr};
+    int line{0};
+    const char *funcname{nullptr};
+};
+
+namespace details {
+// make_unique support for pre c++14
+
+#if __cplusplus >= 201402L // C++14 and beyond
+using std::make_unique;
 #else
-using filename_t = std::string;
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args &&...args)
+{
+    static_assert(!std::is_array<T>::value, "arrays not supported");
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
 #endif
+} // namespace details
+} // namespace spdlog
 
-
-} //spdlog
+#ifdef SPDLOG_HEADER_ONLY
+#include "common-inl.h"
+#endif

include/spdlog/details/async_log_helper.h

@@ -1,390 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-// async log helper :
-// Process logs asynchronously using a back thread.
-//
-// 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 <chrono>
-#include <exception>
-#include <functional>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-namespace spdlog
-{
-namespace details
-{
-
-class async_log_helper
-{
-    // Async msg to move to/from the queue
-    // Movable only. should never be copied
-    enum class async_msg_type
-    {
-        log,
-        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;
-
-        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
-        {
-            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;
-        }
-
-        // never copy or assign. should only be moved..
-        async_msg(const async_msg&) = delete;
-        async_msg& operator=(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)
-        {
-#ifndef SPDLOG_NO_NAME
-            logger_name = *m.logger_name;
-#endif
-        }
-
-
-        // copy into log_msg
-        void fill_log_msg(log_msg &msg)
-        {
-            msg.logger_name = &logger_name;
-            msg.level = level;
-            msg.time = time;
-            msg.thread_id = thread_id;
-            msg.raw << txt;
-        }
-    };
-
-public:
-
-    using item_type = async_msg;
-    using q_type = details::mpmc_bounded_queue<item_type>;
-
-    using clock = std::chrono::steady_clock;
-
-
-    async_log_helper(formatter_ptr formatter,
-                     const 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,
-                     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);
-
-    // stop logging and join the back thread
-    ~async_log_helper();
-
-    void set_formatter(formatter_ptr);
-
-    void flush(bool wait_for_q);
-
-
-private:
-    formatter_ptr _formatter;
-    std::vector<std::shared_ptr<sinks::sink>> _sinks;
-
-    // queue of messages to log
-    q_type _q;
-
-    log_err_handler _err_handler;
-
-    bool _flush_requested;
-
-    bool _terminate_requested;
-
-
-    // overflow policy
-    const async_overflow_policy _overflow_policy;
-
-    // worker thread warmup callback - one can set thread priority, affinity, etc
-    const std::function<void()> _worker_warmup_cb;
-
-    // auto periodic sink flush parameter
-    const std::chrono::milliseconds _flush_interval_ms;
-
-    // worker thread teardown callback
-    const std::function<void()> _worker_teardown_cb;
-
-    // worker thread
-    std::thread _worker_thread;
-
-    void push_msg(async_msg&& new_msg);
-
-    // 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
-    // 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);
-
-    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);
-
-    // wait until the queue is empty
-    void wait_empty_q();
-
-};
-}
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// 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,
-    log_err_handler err_handler,
-    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),
-    _err_handler(err_handler),
-    _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)
-{}
-
-// Send to the worker thread termination message(level=off)
-// and wait for it to finish gracefully
-inline spdlog::details::async_log_helper::~async_log_helper()
-{
-    try
-    {
-        push_msg(async_msg(async_msg_type::terminate));
-        _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)
-{
-    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)));
-    }
-
-}
-
-// optionally wait for the queue be empty and request flush from the sinks
-inline void spdlog::details::async_log_helper::flush(bool wait_for_q)
-{
-    push_msg(async_msg(async_msg_type::flush));
-    if(wait_for_q)
-        wait_empty_q(); //return only make after the above flush message was processed
-}
-
-inline void spdlog::details::async_log_helper::worker_loop()
-{
-    try
-    {
-        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();
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception");
-    }
-}
-
-// 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)
-{
-
-    async_msg incoming_async_msg;
-
-
-    if (_q.dequeue(incoming_async_msg))
-    {
-        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)
-            {
-                if(s->should_log( incoming_log_msg.level))
-                {
-                    s->log(incoming_log_msg);
-                }
-            }
-        }
-        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
-    {
-        auto now = details::os::now();
-        handle_flush_interval(now, last_flush);
-        sleep_or_yield(now, last_pop);
-        return !_terminate_requested;
-    }
-}
-
-// 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)
-    {
-        for (auto &s : _sinks)
-            s->flush();
-        now = last_flush = details::os::now();
-        _flush_requested = false;
-    }
-}
-
-inline void spdlog::details::async_log_helper::set_formatter(formatter_ptr msg_formatter)
-{
-    _formatter = 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)
-{
-    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));
-}
-
-// wait for the queue to be empty
-inline void spdlog::details::async_log_helper::wait_empty_q()
-{
-    auto last_op = details::os::now();
-    while (_q.approx_size() > 0)
-    {
-        sleep_or_yield(details::os::now(), last_op);
-    }
-
-}
-
-
-
-
-
-
-
-

include/spdlog/details/async_logger_impl.h

@@ -1,89 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-// 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 <string>
-#include <functional>
-#include <chrono>
-#include <memory>
-
-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, _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,
-{
-    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(true);
-}
-
-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)
-{
-    _formatter = std::make_shared<pattern_formatter>(pattern);
-    _async_log_helper->set_formatter(_formatter);
-}
-
-
-inline void spdlog::async_logger::_sink_it(details::log_msg& msg)
-{
-    try
-    {
-        _async_log_helper->log(msg);
-        if (_should_flush_on(msg))
-            _async_log_helper->flush(false); // do async flush
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception");
-    }
-}

include/spdlog/details/backtracer-inl.h

@@ -0,0 +1,69 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/backtracer.h>
+#endif
+namespace spdlog {
+namespace details {
+SPDLOG_INLINE backtracer::backtracer(const backtracer &other)
+{
+    std::lock_guard<std::mutex> lock(other.mutex_);
+    enabled_ = other.enabled();
+    messages_ = other.messages_;
+}
+
+SPDLOG_INLINE backtracer::backtracer(backtracer &&other) SPDLOG_NOEXCEPT
+{
+    std::lock_guard<std::mutex> lock(other.mutex_);
+    enabled_ = other.enabled();
+    messages_ = std::move(other.messages_);
+}
+
+SPDLOG_INLINE backtracer &backtracer::operator=(backtracer other)
+{
+    std::lock_guard<std::mutex> lock(mutex_);
+    enabled_ = other.enabled();
+    messages_ = std::move(other.messages_);
+    return *this;
+}
+
+SPDLOG_INLINE void backtracer::enable(size_t size)
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    enabled_.store(true, std::memory_order_relaxed);
+    messages_ = circular_q<log_msg_buffer>{size};
+}
+
+SPDLOG_INLINE void backtracer::disable()
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    enabled_.store(false, std::memory_order_relaxed);
+}
+
+SPDLOG_INLINE bool backtracer::enabled() const
+{
+    return enabled_.load(std::memory_order_relaxed);
+}
+
+SPDLOG_INLINE void backtracer::push_back(const log_msg &msg)
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    messages_.push_back(log_msg_buffer{msg});
+}
+
+// pop all items in the q and apply the given fun on each of them.
+SPDLOG_INLINE void backtracer::foreach_pop(std::function<void(const details::log_msg &)> fun)
+{
+    std::lock_guard<std::mutex> lock{mutex_};
+    while (!messages_.empty())
+    {
+        auto &front_msg = messages_.front();
+        fun(front_msg);
+        messages_.pop_front();
+    }
+}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/backtracer.h

@@ -0,0 +1,45 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/details/log_msg_buffer.h>
+#include <spdlog/details/circular_q.h>
+
+#include <atomic>
+#include <mutex>
+#include <functional>
+
+// Store log messages in circular buffer.
+// Useful for storing debug data in case of error/warning happens.
+
+namespace spdlog {
+namespace details {
+class SPDLOG_API backtracer
+{
+    mutable std::mutex mutex_;
+    std::atomic<bool> enabled_{false};
+    circular_q<log_msg_buffer> messages_;
+
+public:
+    backtracer() = default;
+    backtracer(const backtracer &other);
+
+    backtracer(backtracer &&other) SPDLOG_NOEXCEPT;
+    backtracer &operator=(backtracer other);
+
+    void enable(size_t size);
+    void disable();
+    bool enabled() const;
+    void push_back(const log_msg &msg);
+
+    // pop all items in the q and apply the given fun on each of them.
+    void foreach_pop(std::function<void(const details::log_msg &)> fun);
+};
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "backtracer-inl.h"
+#endif

include/spdlog/details/circular_q.h

@@ -0,0 +1,141 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+// circular q view of std::vector.
+#pragma once
+
+#include <vector>
+#include <cassert>
+
+namespace spdlog {
+namespace details {
+template<typename T>
+class circular_q
+{
+    size_t max_items_ = 0;
+    typename std::vector<T>::size_type head_ = 0;
+    typename std::vector<T>::size_type tail_ = 0;
+    size_t overrun_counter_ = 0;
+    std::vector<T> v_;
+
+public:
+    using value_type = T;
+
+    // empty ctor - create a disabled queue with no elements allocated at all
+    circular_q() = default;
+
+    explicit circular_q(size_t max_items)
+        : max_items_(max_items + 1) // one item is reserved as marker for full q
+        , v_(max_items_)
+    {}
+
+    circular_q(const circular_q &) = default;
+    circular_q &operator=(const circular_q &) = default;
+
+    // move cannot be default,
+    // since we need to reset head_, tail_, etc to zero in the moved object
+    circular_q(circular_q &&other) SPDLOG_NOEXCEPT
+    {
+        copy_moveable(std::move(other));
+    }
+
+    circular_q &operator=(circular_q &&other) SPDLOG_NOEXCEPT
+    {
+        copy_moveable(std::move(other));
+        return *this;
+    }
+
+    // push back, overrun (oldest) item if no room left
+    void push_back(T &&item)
+    {
+        if (max_items_ > 0)
+        {
+            v_[tail_] = std::move(item);
+            tail_ = (tail_ + 1) % max_items_;
+
+            if (tail_ == head_) // overrun last item if full
+            {
+                head_ = (head_ + 1) % max_items_;
+                ++overrun_counter_;
+            }
+        }
+    }
+
+    // Return reference to the front item.
+    // If there are no elements in the container, the behavior is undefined.
+    const T &front() const
+    {
+        return v_[head_];
+    }
+
+    T &front()
+    {
+        return v_[head_];
+    }
+
+    // Return number of elements actually stored
+    size_t size() const
+    {
+        if (tail_ >= head_)
+        {
+            return tail_ - head_;
+        }
+        else
+        {
+            return max_items_ - (head_ - tail_);
+        }
+    }
+
+    // Return const reference to item by index.
+    // If index is out of range 0…size()-1, the behavior is undefined.
+    const T &at(size_t i) const
+    {
+        assert(i < size());
+        return v_[(head_ + i) % max_items_];
+    }
+
+    // Pop item from front.
+    // If there are no elements in the container, the behavior is undefined.
+    void pop_front()
+    {
+        head_ = (head_ + 1) % max_items_;
+    }
+
+    bool empty() const
+    {
+        return tail_ == head_;
+    }
+
+    bool full() const
+    {
+        // head is ahead of the tail by 1
+        if (max_items_ > 0)
+        {
+            return ((tail_ + 1) % max_items_) == head_;
+        }
+        return false;
+    }
+
+    size_t overrun_counter() const
+    {
+        return overrun_counter_;
+    }
+
+private:
+    // copy from other&& and reset it to disabled state
+    void copy_moveable(circular_q &&other) SPDLOG_NOEXCEPT
+    {
+        max_items_ = other.max_items_;
+        head_ = other.head_;
+        tail_ = other.tail_;
+        overrun_counter_ = other.overrun_counter_;
+        v_ = std::move(other.v_);
+
+        // put &&other in disabled, but valid state
+        other.max_items_ = 0;
+        other.head_ = other.tail_ = 0;
+        other.overrun_counter_ = 0;
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/console_globals.h

@@ -0,0 +1,32 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/details/null_mutex.h>
+#include <mutex>
+
+namespace spdlog {
+namespace details {
+
+struct console_mutex
+{
+    using mutex_t = std::mutex;
+    static mutex_t &mutex()
+    {
+        static mutex_t s_mutex;
+        return s_mutex;
+    }
+};
+
+struct console_nullmutex
+{
+    using mutex_t = null_mutex;
+    static mutex_t &mutex()
+    {
+        static mutex_t s_mutex;
+        return s_mutex;
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/file_helper-inl.h

@@ -0,0 +1,147 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/file_helper.h>
+#endif
+
+#include <spdlog/details/os.h>
+#include <spdlog/common.h>
+
+#include <cerrno>
+#include <chrono>
+#include <cstdio>
+#include <string>
+#include <thread>
+#include <tuple>
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE file_helper::~file_helper()
+{
+    close();
+}
+
+SPDLOG_INLINE void file_helper::open(const filename_t &fname, bool truncate)
+{
+    close();
+    filename_ = fname;
+
+    auto *mode = SPDLOG_FILENAME_T("ab");
+    auto *trunc_mode = SPDLOG_FILENAME_T("wb");
+
+    for (int tries = 0; tries < open_tries_; ++tries)
+    {
+        // create containing folder if not exists already.
+        os::create_dir(os::dir_name(fname));
+        if (truncate)
+        {
+            // Truncate by opening-and-closing a tmp file in "wb" mode, always
+            // opening the actual log-we-write-to in "ab" mode, since that
+            // interacts more politely with eternal processes that might
+            // rotate/truncate the file underneath us.
+            std::FILE *tmp;
+            if (os::fopen_s(&tmp, fname, trunc_mode))
+            {
+                continue;
+            }
+            std::fclose(tmp);
+        }
+        if (!os::fopen_s(&fd_, fname, mode))
+        {
+            return;
+        }
+
+        details::os::sleep_for_millis(open_interval_);
+    }
+
+    throw_spdlog_ex("Failed opening file " + os::filename_to_str(filename_) + " for writing", errno);
+}
+
+SPDLOG_INLINE void file_helper::reopen(bool truncate)
+{
+    if (filename_.empty())
+    {
+        throw_spdlog_ex("Failed re opening file - was not opened before");
+    }
+    this->open(filename_, truncate);
+}
+
+SPDLOG_INLINE void file_helper::flush()
+{
+    std::fflush(fd_);
+}
+
+SPDLOG_INLINE void file_helper::close()
+{
+    if (fd_ != nullptr)
+    {
+        std::fclose(fd_);
+        fd_ = nullptr;
+    }
+}
+
+SPDLOG_INLINE void file_helper::write(const memory_buf_t &buf)
+{
+    size_t msg_size = buf.size();
+    auto data = buf.data();
+    if (std::fwrite(data, 1, msg_size, fd_) != msg_size)
+    {
+        throw_spdlog_ex("Failed writing to file " + os::filename_to_str(filename_), errno);
+    }
+}
+
+SPDLOG_INLINE size_t file_helper::size() const
+{
+    if (fd_ == nullptr)
+    {
+        throw_spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(filename_));
+    }
+    return os::filesize(fd_);
+}
+
+SPDLOG_INLINE const filename_t &file_helper::filename() const
+{
+    return filename_;
+}
+
+//
+// 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")
+SPDLOG_INLINE std::tuple<filename_t, filename_t> file_helper::split_by_extension(const 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, filename_t());
+    }
+
+    // treat cases like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
+    auto folder_index = fname.find_last_of(details::os::folder_seps_filename);
+    if (folder_index != filename_t::npos && folder_index >= ext_index - 1)
+    {
+        return std::make_tuple(fname, filename_t());
+    }
+
+    // finally - return a valid base and extension tuple
+    return std::make_tuple(fname.substr(0, ext_index), fname.substr(ext_index));
+}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/file_helper.h

@@ -1,118 +1,59 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-// 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/common.h>
+#include <tuple>
 
-#include <spdlog/details/os.h>
-#include <spdlog/details/log_msg.h>
+namespace spdlog {
+namespace details {
 
-#include <chrono>
-#include <cstdio>
-#include <string>
-#include <thread>
-#include <cerrno>
+// Helper class for file sinks.
+// When failing to open a file, retry several times(5) with a delay interval(10 ms).
+// Throw spdlog_ex exception on errors.
 
-namespace spdlog
+class SPDLOG_API file_helper
 {
-namespace details
-{
-
-class file_helper
-{
-
 public:
-    const int open_tries = 5;
-    const int open_interval = 10;
+    explicit file_helper() = default;
 
-    explicit file_helper() :
-        _fd(nullptr)        
-    {}
+    file_helper(const file_helper &) = delete;
+    file_helper &operator=(const file_helper &) = delete;
+    ~file_helper();
 
-    file_helper(const file_helper&) = delete;
-    file_helper& operator=(const file_helper&) = delete;
+    void open(const filename_t &fname, bool truncate = false);
+    void reopen(bool truncate);
+    void flush();
+    void close();
+    void write(const memory_buf_t &buf);
+    size_t size() const;
+    const filename_t &filename() const;
 
-    ~file_helper()
-    {
-        close();
-    }
-
-
-    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));
-        }
-
-        throw spdlog_ex("Failed opening file " + os::filename_to_str(_filename) + " for writing", errno);
-    }
-
-    void reopen(bool truncate)
-    {
-        if (_filename.empty())
-            throw spdlog_ex("Failed re opening file - was not opened before");
-        open(_filename, truncate);
-
-    }
-
-    void flush()
-    {
-        std::fflush(_fd);
-    }
-
-    void close()
-    {
-        if (_fd)
-        {
-            std::fclose(_fd);
-            _fd = nullptr;
-        }
-    }
-
-    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);        
-    }
-
-    size_t size()
-    {
-        if (!_fd)
-            throw spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(_filename));
-        return os::filesize(_fd);
-    }
-
-    const filename_t& filename() const
-    {
-        return _filename;
-    }
-
-    static bool file_exists(const filename_t& name)
-    {
-
-        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_extension(const filename_t &fname);
 
 private:
-    FILE* _fd;
-    filename_t _filename;    
+    const int open_tries_ = 5;
+    const int open_interval_ = 10;
+    std::FILE *fd_{nullptr};
+    filename_t filename_;
 };
-}
-}
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "file_helper-inl.h"
+#endif

include/spdlog/details/fmt_helper.h

@@ -0,0 +1,116 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+#pragma once
+
+#include <chrono>
+#include <type_traits>
+#include <spdlog/fmt/fmt.h>
+#include <spdlog/common.h>
+
+// Some fmt helpers to efficiently format and pad ints and strings
+namespace spdlog {
+namespace details {
+namespace fmt_helper {
+
+inline spdlog::string_view_t to_string_view(const memory_buf_t &buf) SPDLOG_NOEXCEPT
+{
+    return spdlog::string_view_t{buf.data(), buf.size()};
+}
+
+inline void append_string_view(spdlog::string_view_t view, memory_buf_t &dest)
+{
+    auto *buf_ptr = view.data();
+    dest.append(buf_ptr, buf_ptr + view.size());
+}
+
+template<typename T>
+inline void append_int(T n, memory_buf_t &dest)
+{
+    fmt::format_int i(n);
+    dest.append(i.data(), i.data() + i.size());
+}
+
+template<typename T>
+inline unsigned int count_digits(T n)
+{
+    using count_type = typename std::conditional<(sizeof(T) > sizeof(uint32_t)), uint64_t, uint32_t>::type;
+    return static_cast<unsigned int>(fmt::
+// fmt 7.0.0 renamed the internal namespace to detail.
+// See: https://github.com/fmtlib/fmt/issues/1538
+#if FMT_VERSION < 70000
+            internal
+#else
+            detail
+#endif
+        ::count_digits(static_cast<count_type>(n)));
+}
+
+inline void pad2(int n, memory_buf_t &dest)
+{
+    if (n >= 0 && n < 100) // 0-99
+    {
+        dest.push_back(static_cast<char>('0' + n / 10));
+        dest.push_back(static_cast<char>('0' + n % 10));
+    }
+    else // unlikely, but just in case, let fmt deal with it
+    {
+        fmt::format_to(dest, "{:02}", n);
+    }
+}
+
+template<typename T>
+inline void pad_uint(T n, unsigned int width, memory_buf_t &dest)
+{
+    static_assert(std::is_unsigned<T>::value, "pad_uint must get unsigned T");
+    for (auto digits = count_digits(n); digits < width; digits++)
+    {
+        dest.push_back('0');
+    }
+    append_int(n, dest);
+}
+
+template<typename T>
+inline void pad3(T n, memory_buf_t &dest)
+{
+    static_assert(std::is_unsigned<T>::value, "pad3 must get unsigned T");
+    if (n < 1000)
+    {
+        dest.push_back(static_cast<char>(n / 100 + '0'));
+        n = n % 100;
+        dest.push_back(static_cast<char>((n / 10) + '0'));
+        dest.push_back(static_cast<char>((n % 10) + '0'));
+    }
+    else
+    {
+        append_int(n, dest);
+    }
+}
+
+template<typename T>
+inline void pad6(T n, memory_buf_t &dest)
+{
+    pad_uint(n, 6, dest);
+}
+
+template<typename T>
+inline void pad9(T n, memory_buf_t &dest)
+{
+    pad_uint(n, 9, dest);
+}
+
+// return fraction of a second of the given time_point.
+// e.g.
+// fraction<std::milliseconds>(tp) -> will return the millis part of the second
+template<typename ToDuration>
+inline ToDuration time_fraction(log_clock::time_point tp)
+{
+    using std::chrono::duration_cast;
+    using std::chrono::seconds;
+    auto duration = tp.time_since_epoch();
+    auto secs = duration_cast<seconds>(duration);
+    return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs);
+}
+
+} // namespace fmt_helper
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg-inl.h

@@ -0,0 +1,37 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/log_msg.h>
+#endif
+
+#include <spdlog/details/os.h>
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE log_msg::log_msg(spdlog::log_clock::time_point log_time, spdlog::source_loc loc, string_view_t a_logger_name,
+    spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    : logger_name(a_logger_name)
+    , level(lvl)
+    , time(log_time)
+#ifndef SPDLOG_NO_THREAD_ID
+    , thread_id(os::thread_id())
+#endif
+    , source(loc)
+    , payload(msg)
+{}
+
+SPDLOG_INLINE log_msg::log_msg(
+    spdlog::source_loc loc, string_view_t a_logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    : log_msg(os::now(), loc, a_logger_name, lvl, msg)
+{}
+
+SPDLOG_INLINE log_msg::log_msg(string_view_t a_logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    : log_msg(os::now(), source_loc{}, a_logger_name, lvl, msg)
+{}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg.h

@@ -1,46 +1,36 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
 #include <spdlog/common.h>
-#include <spdlog/details/os.h>
-
-
 #include <string>
-#include <utility>
 
-namespace spdlog
-{
-namespace details
-{
-struct log_msg
+namespace spdlog {
+namespace details {
+struct SPDLOG_API log_msg
 {
     log_msg() = default;
-    log_msg(const std::string *loggers_name, level::level_enum lvl) : logger_name(loggers_name), level(lvl)
-    {
-#ifndef SPDLOG_NO_DATETIME
-        time = os::now();
-#endif
+    log_msg(log_clock::time_point log_time, source_loc loc, string_view_t logger_name, level::level_enum lvl, string_view_t msg);
+    log_msg(source_loc loc, string_view_t logger_name, level::level_enum lvl, string_view_t msg);
+    log_msg(string_view_t logger_name, level::level_enum lvl, string_view_t msg);
+    log_msg(const log_msg &other) = default;
 
-#ifndef SPDLOG_NO_THREAD_ID
-        thread_id = os::thread_id();
-#endif
-    }
-
-    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;
-    level::level_enum level;
+    string_view_t logger_name;
+    level::level_enum level{level::off};
     log_clock::time_point time;
-    size_t thread_id;
-    fmt::MemoryWriter raw;
-    fmt::MemoryWriter formatted;
+    size_t thread_id{0};
+
+    // wrapping the formatted text with color (updated by pattern_formatter).
+    mutable size_t color_range_start{0};
+    mutable size_t color_range_end{0};
+
+    source_loc source;
+    string_view_t payload;
 };
-}
-}
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "log_msg-inl.h"
+#endif

include/spdlog/details/log_msg_buffer-inl.h

@@ -0,0 +1,60 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/log_msg_buffer.h>
+#endif
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg &orig_msg)
+    : log_msg{orig_msg}
+{
+    buffer.append(logger_name.begin(), logger_name.end());
+    buffer.append(payload.begin(), payload.end());
+    update_string_views();
+}
+
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg_buffer &other)
+    : log_msg{other}
+{
+    buffer.append(logger_name.begin(), logger_name.end());
+    buffer.append(payload.begin(), payload.end());
+    update_string_views();
+}
+
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(log_msg_buffer &&other) SPDLOG_NOEXCEPT 
+    : log_msg{other}
+    , buffer{std::move(other.buffer)}
+{
+    update_string_views();
+}
+
+SPDLOG_INLINE log_msg_buffer &log_msg_buffer::operator=(const log_msg_buffer &other)
+{
+    log_msg::operator=(other);
+    buffer.clear();
+    buffer.append(other.buffer.data(), other.buffer.data() + other.buffer.size());
+    update_string_views();
+    return *this;
+}
+
+SPDLOG_INLINE log_msg_buffer &log_msg_buffer::operator=(log_msg_buffer &&other) SPDLOG_NOEXCEPT
+{
+    log_msg::operator=(other);
+    buffer = std::move(other.buffer);
+    update_string_views();
+    return *this;
+}
+
+SPDLOG_INLINE void log_msg_buffer::update_string_views()
+{
+    logger_name = string_view_t{buffer.data(), logger_name.size()};
+    payload = string_view_t{buffer.data() + logger_name.size(), payload.size()};
+}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/log_msg_buffer.h

@@ -0,0 +1,33 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/details/log_msg.h>
+
+namespace spdlog {
+namespace details {
+
+// Extend log_msg with internal buffer to store its payload.
+// This is needed since log_msg holds string_views that points to stack data.
+
+class SPDLOG_API log_msg_buffer : public log_msg
+{
+    memory_buf_t buffer;
+    void update_string_views();
+
+public:
+    log_msg_buffer() = default;
+    explicit log_msg_buffer(const log_msg &orig_msg);
+    log_msg_buffer(const log_msg_buffer &other);
+    log_msg_buffer(log_msg_buffer &&other) SPDLOG_NOEXCEPT;
+    log_msg_buffer &operator=(const log_msg_buffer &other);
+    log_msg_buffer &operator=(log_msg_buffer &&other) SPDLOG_NOEXCEPT;
+};
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "log_msg_buffer-inl.h"
+#endif

include/spdlog/details/logger_impl.h

@@ -1,293 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include <spdlog/logger.h>
-#include <spdlog/sinks/stdout_sinks.h>
-
-#include <memory>
-#include <string>
-
-
-// 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>("%+"))
-{
-    _level = level::info;
-    _flush_level = level::off;
-    _last_err_time = 0;
-    _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())
-{}
-
-
-// ctor with single sink
-inline spdlog::logger::logger(const std::string& logger_name, spdlog::sink_ptr single_sink):
-    logger(logger_name,
-{
-    single_sink
-})
-{}
-
-
-inline spdlog::logger::~logger() = default;
-
-
-inline void spdlog::logger::set_formatter(spdlog::formatter_ptr msg_formatter)
-{
-    _set_formatter(msg_formatter);
-}
-
-inline void spdlog::logger::set_pattern(const std::string& pattern)
-{
-    _set_pattern(pattern);
-}
-
-
-template <typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const char* fmt, const Args&... args)
-{
-    if (!should_log(lvl)) return;
-
-    try
-    {
-        details::log_msg log_msg(&_name, lvl);
-        log_msg.raw.write(fmt, args...);
-        _sink_it(log_msg);
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception");
-    }
-}
-
-template <typename... Args>
-inline void spdlog::logger::log(level::level_enum lvl, const char* msg)
-{
-    if (!should_log(lvl)) return;
-    try
-    {
-        details::log_msg log_msg(&_name, lvl);
-        log_msg.raw << msg;
-        _sink_it(log_msg);
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception");
-    }
-
-}
-
-template<typename T>
-inline void spdlog::logger::log(level::level_enum lvl, const T& msg)
-{
-    if (!should_log(lvl)) return;
-    try
-    {
-        details::log_msg log_msg(&_name, lvl);
-        log_msg.raw << msg;
-        _sink_it(log_msg);
-    }
-    catch (const std::exception &ex)
-    {
-        _err_handler(ex.what());
-    }
-    catch (...)
-    {
-        _err_handler("Unknown exception");
-    }
-}
-
-
-template <typename... Args>
-inline void spdlog::logger::trace(const char* fmt, const Args&... args)
-{
-    log(level::trace, fmt, args...);
-}
-
-template <typename... Args>
-inline void spdlog::logger::debug(const char* fmt, const Args&... args)
-{
-    log(level::debug, fmt, args...);
-}
-
-template <typename... Args>
-inline void spdlog::logger::info(const char* fmt, const Args&... args)
-{
-    log(level::info, fmt, args...);
-}
-
-
-template <typename... Args>
-inline void spdlog::logger::warn(const char* fmt, const Args&... args)
-{
-    log(level::warn, fmt, args...);
-}
-
-template <typename... Args>
-inline void spdlog::logger::error(const char* fmt, const Args&... args)
-{
-    log(level::err, fmt, args...);
-}
-
-template <typename... Args>
-inline void spdlog::logger::critical(const char* fmt, const Args&... args)
-{
-    log(level::critical, fmt, args...);
-}
-
-
-template<typename T>
-inline void spdlog::logger::trace(const T& msg)
-{
-    log(level::trace, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::debug(const T& msg)
-{
-    log(level::debug, msg);
-}
-
-
-template<typename T>
-inline void spdlog::logger::info(const T& msg)
-{
-    log(level::info, msg);
-}
-
-
-template<typename T>
-inline void spdlog::logger::warn(const T& msg)
-{
-    log(level::warn, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::error(const T& msg)
-{
-    log(level::err, msg);
-}
-
-template<typename T>
-inline void spdlog::logger::critical(const T& msg)
-{
-    log(level::critical, msg);
-}
-
-
-
-
-//
-// name and level
-//
-inline const std::string& spdlog::logger::name() const
-{
-    return _name;
-}
-
-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 = 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);
-}
-
-inline spdlog::level::level_enum spdlog::logger::level() const
-{
-    return static_cast<spdlog::level::level_enum>(_level.load(std::memory_order_relaxed));
-}
-
-inline bool spdlog::logger::should_log(spdlog::level::level_enum msg_level) const
-{
-    return msg_level >= _level.load(std::memory_order_relaxed);
-}
-
-//
-// 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)
-{
-    _formatter->format(msg);
-    for (auto &sink : _sinks)
-    {
-        if( sink->should_log( msg.level))
-        {
-            sink->log(msg);
-        }
-    }
-
-    if(_should_flush_on(msg))
-        flush();
-}
-
-inline void spdlog::logger::_set_pattern(const std::string& pattern)
-{
-    _formatter = std::make_shared<pattern_formatter>(pattern);
-}
-inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
-{
-    _formatter = msg_formatter;
-}
-
-inline void spdlog::logger::flush()
-{
-    for (auto& sink : _sinks)
-        sink->flush();
-}
-
-inline void spdlog::logger::_default_err_handler(const std::string &msg)
-{
-    auto now = time(nullptr);
-    if (now - _last_err_time < 60)
-        return;
-    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);
-    details::log_msg  err_msg;
-    err_msg.formatted.write("[*** LOG ERROR ***] [{}] [{}] [{}]{}", name(), msg, date_buf, details::os::eol);
-    sinks::stderr_sink_mt::instance()->log(err_msg);
-    _last_err_time = now;
-}
-
-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);
-}

include/spdlog/details/mpmc_blocking_q.h

@@ -0,0 +1,126 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+// multi producer-multi consumer blocking queue.
+// enqueue(..) - will block until room found to put the new message.
+// enqueue_nowait(..) - will return immediately with false if no room left in
+// the queue.
+// dequeue_for(..) - will block until the queue is not empty or timeout have
+// passed.
+
+#include <spdlog/details/circular_q.h>
+
+#include <condition_variable>
+#include <mutex>
+
+namespace spdlog {
+namespace details {
+
+template<typename T>
+class mpmc_blocking_queue
+{
+public:
+    using item_type = T;
+    explicit mpmc_blocking_queue(size_t max_items)
+        : q_(max_items)
+    {}
+
+#ifndef __MINGW32__
+    // 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_.full(); });
+            q_.push_back(std::move(item));
+        }
+        push_cv_.notify_one();
+    }
+
+    // enqueue immediately. overrun oldest message in the queue if no room left.
+    void enqueue_nowait(T &&item)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            q_.push_back(std::move(item));
+        }
+        push_cv_.notify_one();
+    }
+
+    // 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_.empty(); }))
+            {
+                return false;
+            }
+            popped_item = std::move(q_.front());
+            q_.pop_front();
+        }
+        pop_cv_.notify_one();
+        return true;
+    }
+
+#else
+    // apparently mingw deadlocks if the mutex is released before cv.notify_one(),
+    // so release the mutex at the very end each function.
+
+    // 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_.full(); });
+        q_.push_back(std::move(item));
+        push_cv_.notify_one();
+    }
+
+    // enqueue immediately. overrun oldest message in the queue if no room left.
+    void enqueue_nowait(T &&item)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        q_.push_back(std::move(item));
+        push_cv_.notify_one();
+    }
+
+    // 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_.empty(); }))
+        {
+            return false;
+        }
+        popped_item = std::move(q_.front());
+        q_.pop_front();
+        pop_cv_.notify_one();
+        return true;
+    }
+
+#endif
+
+    size_t overrun_counter()
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        return q_.overrun_counter();
+    }
+
+    size_t size()
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        return q_.size();
+    }
+
+private:
+    std::mutex queue_mutex_;
+    std::condition_variable push_cv_;
+    std::condition_variable pop_cv_;
+    spdlog::details::circular_q<T> q_;
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/mpmc_bounded_q.h

@@ -1,172 +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)
-        :max_size_(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;
-    }
-
-    size_t approx_size()
-    {
-        size_t first_pos = dequeue_pos_.load(std::memory_order_relaxed);
-        size_t last_pos = enqueue_pos_.load(std::memory_order_relaxed);
-        if (last_pos <= first_pos)
-            return 0;
-        auto size = last_pos - first_pos;
-        return size < max_size_ ? size : max_size_;
-    }
-
-private:
-    struct cell_t
-    {
-        std::atomic<size_t>   sequence_;
-        T                     data_;
-    };
-
-    size_t const max_size_;
-
-    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&) = delete;
-    void operator= (mpmc_bounded_queue const&) = delete;
-};
-
-} // ns details
-} // ns spdlog

include/spdlog/details/null_mutex.h

@@ -1,22 +1,19 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
 #include <atomic>
+#include <utility>
 // null, no cost dummy "mutex" and dummy "atomic" int
 
-namespace spdlog
-{
-namespace details
-{
+namespace spdlog {
+namespace details {
 struct null_mutex
 {
-    void lock() {}
-    void unlock() {}
-    bool try_lock()
+    void lock() const {}
+    void unlock() const {}
+    bool try_lock() const
     {
         return true;
     }
@@ -27,19 +24,26 @@ struct null_atomic_int
     int value;
     null_atomic_int() = default;
 
-    null_atomic_int(int val):value(val)
+    explicit null_atomic_int(int new_value)
+        : value(new_value)
     {}
 
-    int load(std::memory_order) const
+    int load(std::memory_order = std::memory_order_relaxed) const
     {
         return value;
     }
 
-    void store(int val)
+    void store(int new_value, std::memory_order = std::memory_order_relaxed)
     {
-        value = val;
+        value = new_value;
+    }
+
+    int exchange(int new_value, std::memory_order = std::memory_order_relaxed)
+    {
+        std::swap(new_value, value);
+        return new_value; // return value before the call
     }
 };
 
-}
-}
+} // namespace details
+} // namespace spdlog

include/spdlog/details/os-inl.h

@@ -0,0 +1,589 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/os.h>
+#endif
+
+#include <spdlog/common.h>
+
+#include <algorithm>
+#include <chrono>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <string>
+#include <thread>
+#include <array>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#ifdef _WIN32
+
+#include <io.h>      // _get_osfhandle and _isatty support
+#include <process.h> //  _get_pid support
+#include <spdlog/details/windows_include.h>
+
+#ifdef __MINGW32__
+#include <share.h>
+#endif
+
+#if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)
+#include <limits>
+#endif
+
+#include <direct.h> // for _mkdir/_wmkdir
+
+#else // unix
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef __linux__
+#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
+
+#elif defined(_AIX)
+#include <pthread.h> // for pthread_getthreadid_np
+
+#elif defined(__DragonFly__) || defined(__FreeBSD__)
+#include <pthread_np.h> // for pthread_getthreadid_np
+
+#elif defined(__NetBSD__)
+#include <lwp.h> // for _lwp_self
+
+#elif defined(__sun)
+#include <thread.h> // for thr_self
+#endif
+
+#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 {
+
+SPDLOG_INLINE spdlog::log_clock::time_point now() SPDLOG_NOEXCEPT
+{
+
+#if defined __linux__ && defined SPDLOG_CLOCK_COARSE
+    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)));
+
+#else
+    return log_clock::now();
+#endif
+}
+SPDLOG_INLINE std::tm localtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    std::tm tm;
+    ::localtime_s(&tm, &time_tt);
+#else
+    std::tm tm;
+    ::localtime_r(&time_tt, &tm);
+#endif
+    return tm;
+}
+
+SPDLOG_INLINE std::tm localtime() SPDLOG_NOEXCEPT
+{
+    std::time_t now_t = ::time(nullptr);
+    return localtime(now_t);
+}
+
+SPDLOG_INLINE std::tm gmtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    std::tm tm;
+    ::gmtime_s(&tm, &time_tt);
+#else
+    std::tm tm;
+    ::gmtime_r(&time_tt, &tm);
+#endif
+    return tm;
+}
+
+SPDLOG_INLINE std::tm gmtime() SPDLOG_NOEXCEPT
+{
+    std::time_t now_t = ::time(nullptr);
+    return gmtime(now_t);
+}
+
+// fopen_s on non windows for writing
+SPDLOG_INLINE bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    *fp = ::_wfsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
+#else
+    *fp = ::_fsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
+#endif
+#if defined(SPDLOG_PREVENT_CHILD_FD)
+    if (*fp != nullptr)
+    {
+        auto file_handle = reinterpret_cast<HANDLE>(_get_osfhandle(::_fileno(*fp)));
+        if (!::SetHandleInformation(file_handle, HANDLE_FLAG_INHERIT, 0))
+        {
+            ::fclose(*fp);
+            *fp = nullptr;
+        }
+    }
+#endif
+#else // unix
+#if defined(SPDLOG_PREVENT_CHILD_FD)
+    const int mode_flag = mode == SPDLOG_FILENAME_T("ab") ? O_APPEND : O_TRUNC;
+    const int fd = ::open((filename.c_str()), O_CREAT | O_WRONLY | O_CLOEXEC | mode_flag, mode_t(0644));
+    if (fd == -1)
+    {
+        return false;
+    }
+    *fp = ::fdopen(fd, mode.c_str());
+    if (*fp == nullptr)
+    {
+        ::close(fd);
+    }
+#else
+    *fp = ::fopen((filename.c_str()), mode.c_str());
+#endif
+#endif
+
+    return *fp == nullptr;
+}
+
+SPDLOG_INLINE int remove(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+    return ::_wremove(filename.c_str());
+#else
+    return std::remove(filename.c_str());
+#endif
+}
+
+SPDLOG_INLINE int remove_if_exists(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+    return path_exists(filename) ? remove(filename) : 0;
+}
+
+SPDLOG_INLINE int rename(const filename_t &filename1, const filename_t &filename2) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+    return ::_wrename(filename1.c_str(), filename2.c_str());
+#else
+    return std::rename(filename1.c_str(), filename2.c_str());
+#endif
+}
+
+// Return true if path exists (file or directory)
+SPDLOG_INLINE bool path_exists(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    auto attribs = ::GetFileAttributesW(filename.c_str());
+#else
+    auto attribs = ::GetFileAttributesA(filename.c_str());
+#endif
+    return attribs != INVALID_FILE_ATTRIBUTES;
+#else // common linux/unix all have the stat system call
+    struct stat buffer;
+    return (::stat(filename.c_str(), &buffer) == 0);
+#endif
+}
+
+// Return file size according to open FILE* object
+SPDLOG_INLINE size_t filesize(FILE *f)
+{
+    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
+    __int64 ret = ::_filelengthi64(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
+
+#else // windows 32 bits
+    long ret = ::_filelength(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
+#endif
+
+#else // unix
+// OpenBSD doesn't compile with :: before the fileno(..)
+#if defined(__OpenBSD__)
+    int fd = fileno(f);
+#else
+    int fd = ::fileno(f);
+#endif
+// 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
+#if (defined(__linux__) || defined(__sun) || defined(_AIX)) && (defined(__LP64__) || defined(_LP64))
+    struct stat64 st;
+    if (::fstat64(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
+#else // other unix or linux 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);
+    return 0; // will not be reached.
+}
+
+// Return utc offset in minutes or throw spdlog_ex on failure
+SPDLOG_INLINE int utc_minutes_offset(const std::tm &tm)
+{
+
+#ifdef _WIN32
+#if _WIN32_WINNT < _WIN32_WINNT_WS08
+    TIME_ZONE_INFORMATION tzinfo;
+    auto rv = ::GetTimeZoneInformation(&tzinfo);
+#else
+    DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
+    auto rv = ::GetDynamicTimeZoneInformation(&tzinfo);
+#endif
+    if (rv == TIME_ZONE_ID_INVALID)
+        throw_spdlog_ex("Failed getting timezone info. ", errno);
+
+    int offset = -tzinfo.Bias;
+    if (tm.tm_isdst)
+    {
+        offset -= tzinfo.DaylightBias;
+    }
+    else
+    {
+        offset -= tzinfo.StandardBias;
+    }
+    return offset;
+#else
+
+#if defined(sun) || defined(__sun) || defined(_AIX) || (!defined(_BSD_SOURCE) && !defined(_GNU_SOURCE))
+    // '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(especially
+// under VS 2013)
+SPDLOG_INLINE size_t _thread_id() SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+    return static_cast<size_t>(::GetCurrentThreadId());
+#elif defined(__linux__)
+#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+#define SYS_gettid __NR_gettid
+#endif
+    return static_cast<size_t>(::syscall(SYS_gettid));
+#elif defined(_AIX) || defined(__DragonFly__) || defined(__FreeBSD__)
+    return static_cast<size_t>(::pthread_getthreadid_np());
+#elif defined(__NetBSD__)
+    return static_cast<size_t>(::_lwp_self());
+#elif defined(__OpenBSD__)
+    return static_cast<size_t>(::getthrid());
+#elif defined(__sun)
+    return static_cast<size_t>(::thr_self());
+#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)
+SPDLOG_INLINE size_t thread_id() SPDLOG_NOEXCEPT
+{
+#if defined(SPDLOG_NO_TLS)
+    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
+SPDLOG_INLINE void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT
+{
+#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)
+SPDLOG_INLINE std::string filename_to_str(const filename_t &filename)
+{
+    memory_buf_t buf;
+    wstr_to_utf8buf(filename, buf);
+    return fmt::to_string(buf);
+}
+#else
+SPDLOG_INLINE std::string filename_to_str(const filename_t &filename)
+{
+    return filename;
+}
+#endif
+
+SPDLOG_INLINE int pid() SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    return static_cast<int>(::GetCurrentProcessId());
+#else
+    return static_cast<int>(::getpid());
+#endif
+}
+
+// Determine if the terminal supports colors
+// Based on: https://github.com/agauniyal/rang/
+SPDLOG_INLINE bool is_color_terminal() SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+    return true;
+#else
+
+    static const bool result = []() {
+        const char *env_colorterm_p = std::getenv("COLORTERM");
+        if (env_colorterm_p != nullptr)
+        {
+            return true;
+        }
+
+        static constexpr std::array<const char *, 15> terms = {{"ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux",
+            "msys", "putty", "rxvt", "screen", "vt100", "xterm", "alacritty"}};
+
+        const char *env_term_p = std::getenv("TERM");
+        if (env_term_p == nullptr)
+        {
+            return false;
+        }
+
+        return std::any_of(terms.begin(), terms.end(), [&](const char *term) { return std::strstr(env_term_p, term) != nullptr; });
+    }();
+
+    return result;
+#endif
+}
+
+// Determine if the terminal attached
+// Source: https://github.com/agauniyal/rang/
+SPDLOG_INLINE bool in_terminal(FILE *file) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    return ::_isatty(_fileno(file)) != 0;
+#else
+    return ::isatty(fileno(file)) != 0;
+#endif
+}
+
+#if (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
+SPDLOG_INLINE void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t &target)
+{
+    if (wstr.size() > static_cast<size_t>((std::numeric_limits<int>::max)()) / 2 - 1)
+    {
+        throw_spdlog_ex("UTF-16 string is too big to be converted to UTF-8");
+    }
+
+    int wstr_size = static_cast<int>(wstr.size());
+    if (wstr_size == 0)
+    {
+        target.resize(0);
+        return;
+    }
+
+    int result_size = static_cast<int>(target.capacity());
+    if ((wstr_size + 1) * 2 > result_size)
+    {
+        result_size = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, NULL, 0, NULL, NULL);
+    }
+
+    if (result_size > 0)
+    {
+        target.resize(result_size);
+        result_size = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, target.data(), result_size, NULL, NULL);
+
+        if (result_size > 0)
+        {
+            target.resize(result_size);
+            return;
+        }
+    }
+
+    throw_spdlog_ex(fmt::format("WideCharToMultiByte failed. Last error: {}", ::GetLastError()));
+}
+
+SPDLOG_INLINE void utf8_to_wstrbuf(string_view_t str, wmemory_buf_t &target)
+{
+    if (str.size() > static_cast<size_t>((std::numeric_limits<int>::max)()) - 1)
+    {
+        throw_spdlog_ex("UTF-8 string is too big to be converted to UTF-16");
+    }
+
+    int str_size = static_cast<int>(str.size());
+    if (str_size == 0)
+    {
+        target.resize(0);
+        return;
+    }
+
+    int result_size = static_cast<int>(target.capacity());
+    if (str_size + 1 > result_size)
+    {
+        result_size = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.data(), str_size, NULL, 0);
+    }
+
+    if (result_size > 0)
+    {
+        target.resize(result_size);
+        result_size = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.data(), str_size, target.data(), result_size);
+
+        if (result_size > 0)
+        {
+            target.resize(result_size);
+            return;
+        }
+    }
+
+    throw_spdlog_ex(fmt::format("MultiByteToWideChar failed. Last error: {}", ::GetLastError()));
+}
+#endif // (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
+
+// return true on success
+static SPDLOG_INLINE bool mkdir_(const filename_t &path)
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    return ::_wmkdir(path.c_str()) == 0;
+#else
+    return ::_mkdir(path.c_str()) == 0;
+#endif
+#else
+    return ::mkdir(path.c_str(), mode_t(0755)) == 0;
+#endif
+}
+
+// create the given directory - and all directories leading to it
+// return true on success or if the directory already exists
+SPDLOG_INLINE bool create_dir(filename_t path)
+{
+    if (path_exists(path))
+    {
+        return true;
+    }
+
+    if (path.empty())
+    {
+        return false;
+    }
+
+    size_t search_offset = 0;
+    do
+    {
+        auto token_pos = path.find_first_of(folder_seps_filename, search_offset);
+        // treat the entire path as a folder if no folder separator not found
+        if (token_pos == filename_t::npos)
+        {
+            token_pos = path.size();
+        }
+
+        auto subdir = path.substr(0, token_pos);
+
+        if (!subdir.empty() && !path_exists(subdir) && !mkdir_(subdir))
+        {
+            return false; // return error if failed creating dir
+        }
+        search_offset = token_pos + 1;
+    } while (search_offset < path.size());
+
+    return true;
+}
+
+// Return directory name from given path or empty string
+// "abc/file" => "abc"
+// "abc/" => "abc"
+// "abc" => ""
+// "abc///" => "abc//"
+SPDLOG_INLINE filename_t dir_name(filename_t path)
+{
+    auto pos = path.find_last_of(folder_seps_filename);
+    return pos != filename_t::npos ? path.substr(0, pos) : filename_t{};
+}
+
+std::string SPDLOG_INLINE getenv(const char *field)
+{
+
+#if defined(_MSC_VER)
+#if defined(__cplusplus_winrt)
+    return std::string{}; // not supported under uwp
+#else
+    size_t len = 0;
+    char buf[128];
+    bool ok = ::getenv_s(&len, buf, sizeof(buf), field) == 0;
+    return ok ? buf : std::string{};
+#endif
+#else // revert to getenv
+    char *buf = ::getenv(field);
+    return buf ? buf : std::string{};
+#endif
+}
+
+} // namespace os
+} // namespace details
+} // namespace spdlog

include/spdlog/details/os.h

@@ -1,130 +1,27 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
+
 #pragma once
 
 #include <spdlog/common.h>
+#include <ctime> // std::time_t
 
-#include <cstdio>
-#include <ctime>
-#include <functional>
-#include <string>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
+namespace spdlog {
+namespace details {
+namespace os {
 
+SPDLOG_API spdlog::log_clock::time_point now() SPDLOG_NOEXCEPT;
 
-#ifdef _WIN32
+SPDLOG_API std::tm localtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT;
 
-#ifndef NOMINMAX
-#define NOMINMAX //prevent windows redefining min/max
-#endif
+SPDLOG_API std::tm localtime() SPDLOG_NOEXCEPT;
 
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#include <windows.h>
+SPDLOG_API std::tm gmtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT;
 
-#ifdef __MINGW32__
-#include <share.h>
-#endif
-
-#include <sys/types.h>
-
-#elif __linux__
-
-#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
-#include <unistd.h>
-#include <chrono>
-
-#elif __FreeBSD__
-#include <sys/thr.h> //Use thr_self() syscall under FreeBSD to get thread id
-
-#else
-#include <thread>
-
-#endif
-
-namespace spdlog
-{
-namespace details
-{
-namespace os
-{
-
-inline spdlog::log_clock::time_point now()
-{
-
-#if defined __linux__ && defined SPDLOG_CLOCK_COARSE
-    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)));
-
-
-#else
-    return log_clock::now();
-#endif
-
-}
-inline std::tm localtime(const std::time_t &time_tt)
-{
-
-#ifdef _WIN32
-    std::tm tm;
-    localtime_s(&tm, &time_tt);
-#else
-    std::tm tm;
-    localtime_r(&time_tt, &tm);
-#endif
-    return tm;
-}
-
-inline std::tm localtime()
-{
-    std::time_t now_t = time(nullptr);
-    return localtime(now_t);
-}
-
-
-inline std::tm gmtime(const std::time_t &time_tt)
-{
-
-#ifdef _WIN32
-    std::tm tm;
-    gmtime_s(&tm, &time_tt);
-#else
-    std::tm tm;
-    gmtime_r(&time_tt, &tm);
-#endif
-    return tm;
-}
-
-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)
-{
-    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)
-{
-    return !(tm1 == tm2);
-}
+SPDLOG_API std::tm gmtime() SPDLOG_NOEXCEPT;
 
 // eol definition
-#if !defined (SPDLOG_EOL)
+#if !defined(SPDLOG_EOL)
 #ifdef _WIN32
 #define SPDLOG_EOL "\r\n"
 #else
@@ -132,229 +29,90 @@ 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;
 
-
-
-//fopen_s on non windows for writing
-inline int fopen_s(FILE** fp, const filename_t& filename, const filename_t& mode)
-{
+// folder separator
+#if !defined(SPDLOG_FOLDER_SEPS)
 #ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
-    *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
+#define SPDLOG_FOLDER_SEPS "\\/"
 #else
-    *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
-#endif
-    return *fp == nullptr;
-#else
-    *fp = fopen((filename.c_str()), mode.c_str());
-    return *fp == nullptr;
-#endif
-}
-
-inline int remove(const filename_t &filename)
-{
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-    return _wremove(filename.c_str());
-#else
-    return std::remove(filename.c_str());
-#endif
-}
-
-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());
-#else
-    return std::rename(filename1.c_str(), filename2.c_str());
-#endif
-}
-
-
-//Return if file exists
-inline bool file_exists(const filename_t& filename)
-{
-#ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
-    auto attribs = GetFileAttributesW(filename.c_str());
-#else
-    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
-    struct stat buffer;
-    return (stat (filename.c_str(), &buffer) == 0);
-#endif
-}
-
-
-
-
-//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;
-#endif
-
-#else // unix
-    int fd = fileno(f);
-    //64 bits(but not in osx, where fstat64 is deprecated)
-#if !defined(__FreeBSD__) && !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;
+#define SPDLOG_FOLDER_SEPS "/"
 #endif
 #endif
-    throw spdlog_ex("Failed getting file size from fd", errno);
-}
 
+SPDLOG_CONSTEXPR static const char folder_seps[] = SPDLOG_FOLDER_SEPS;
+SPDLOG_CONSTEXPR static const filename_t::value_type folder_seps_filename[] = SPDLOG_FILENAME_T(SPDLOG_FOLDER_SEPS);
 
+// fopen_s on non windows for writing
+SPDLOG_API bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode);
 
+// Remove filename. return 0 on success
+SPDLOG_API int remove(const filename_t &filename) SPDLOG_NOEXCEPT;
 
-//Return utc offset in minutes or throw spdlog_ex on failure
-inline int utc_minutes_offset(const std::tm& tm = details::os::localtime())
-{
+// Remove file if exists. return 0 on success
+// Note: Non atomic (might return failure to delete if concurrently deleted by other process/thread)
+SPDLOG_API int remove_if_exists(const filename_t &filename) SPDLOG_NOEXCEPT;
 
-#ifdef _WIN32
-#if _WIN32_WINNT < _WIN32_WINNT_WS08
-    TIME_ZONE_INFORMATION tzinfo;
-    auto rv = GetTimeZoneInformation(&tzinfo);
-#else
-    DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
-    auto rv = GetDynamicTimeZoneInformation(&tzinfo);
-#endif
-    if (rv == TIME_ZONE_ID_INVALID)
-        throw spdlog::spdlog_ex("Failed getting timezone info. ", errno);
+SPDLOG_API int rename(const filename_t &filename1, const filename_t &filename2) SPDLOG_NOEXCEPT;
 
-    int offset = -tzinfo.Bias;
-    if (tm.tm_isdst)
-        offset -= tzinfo.DaylightBias;
-    else
-        offset -= tzinfo.StandardBias;
-    return offset;
-#else
+// Return if file exists.
+SPDLOG_API bool path_exists(const filename_t &filename) SPDLOG_NOEXCEPT;
 
-#if defined(sun) || defined(__sun)
-    // '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);
+// Return file size according to open FILE* object
+SPDLOG_API size_t filesize(FILE *f);
 
-            long int days = (
-                                // difference in day of year
-                                localtm.tm_yday - gmtm.tm_yday
+// Return utc offset in minutes or throw spdlog_ex on failure
+SPDLOG_API int utc_minutes_offset(const std::tm &tm = details::os::localtime());
 
-                                // + intervening leap days
-                                + ((local_year >> 2) - (gmt_year >> 2))
-                                - (local_year / 100 - gmt_year / 100)
-                                + ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
+// Return current thread id as size_t
+// It exists because the std::this_thread::get_id() is much slower(especially
+// under VS 2013)
+SPDLOG_API size_t _thread_id() SPDLOG_NOEXCEPT;
 
-                                // + difference in years * 365 */
-                                + (long int)(local_year - gmt_year) * 365
-                            );
+// Return current thread id as size_t (from thread local storage)
+SPDLOG_API size_t thread_id() SPDLOG_NOEXCEPT;
 
-            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);
+// This is avoid msvc issue in sleep_for that happens if the clock changes.
+// See https://github.com/gabime/spdlog/issues/609
+SPDLOG_API void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT;
 
-            return secs;
-        }
-    };
+SPDLOG_API std::string filename_to_str(const filename_t &filename);
 
-    long int offset_seconds = helper::calculate_gmt_offset(tm);
-#else
-    long int offset_seconds = tm.tm_gmtoff;
+SPDLOG_API int pid() SPDLOG_NOEXCEPT;
+
+// Determine if the terminal supports colors
+// Source: https://github.com/agauniyal/rang/
+SPDLOG_API bool is_color_terminal() SPDLOG_NOEXCEPT;
+
+// Determine if the terminal attached
+// Source: https://github.com/agauniyal/rang/
+SPDLOG_API bool in_terminal(FILE *file) SPDLOG_NOEXCEPT;
+
+#if (defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)) && defined(_WIN32)
+SPDLOG_API void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t &target);
+
+SPDLOG_API void utf8_to_wstrbuf(string_view_t str, wmemory_buf_t &target);
 #endif
 
-    return static_cast<int>(offset_seconds / 60);
+// Return directory name from given path or empty string
+// "abc/file" => "abc"
+// "abc/" => "abc"
+// "abc" => ""
+// "abc///" => "abc//"
+SPDLOG_API filename_t dir_name(filename_t path);
+
+// Create a dir from the given path.
+// Return true if succeeded or if this dir already exists.
+SPDLOG_API bool create_dir(filename_t path);
+
+// non thread safe, cross platform getenv/getenv_s
+// return empty string if field not found
+SPDLOG_API std::string getenv(const char *field);
+
+} // namespace os
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "os-inl.h"
 #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()
-{
-#ifdef _WIN32
-    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));
-#elif __FreeBSD__
-    long tid;
-    thr_self(&tid);
-    return static_cast<size_t>(tid);
-#else //Default to standard C++11 (OSX and other Unix)
-    return static_cast<size_t>(std::hash<std::thread::id>()(std::this_thread::get_id()));
-#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)
-{
-    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)
-{
-    return filename;
-}
-#endif
-
-
-// Return errno string (thread safe)
-inline std::string errno_str(int err_num)
-{
-    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(__FreeBSD__) || defined(__APPLE__) || defined(ANDROID) || \
-      ((_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));
-#endif
-}
-
-} //os
-} //details
-} //spdlog

include/spdlog/details/pattern_formatter_impl.h

@@ -1,636 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-#include <spdlog/formatter.h>
-#include <spdlog/details/log_msg.h>
-#include <spdlog/details/os.h>
-#include <spdlog/fmt/fmt.h>
-
-#include <chrono>
-#include <ctime>
-#include <memory>
-#include <mutex>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-namespace spdlog
-{
-namespace details
-{
-class flag_formatter
-{
-public:
-    virtual ~flag_formatter()
-    {}
-    virtual void format(details::log_msg& msg, const std::tm& tm_time) = 0;
-};
-
-///////////////////////////////////////////////////////////////////////
-// name & level pattern appenders
-///////////////////////////////////////////////////////////////////////
-namespace
-{
-class name_formatter:public flag_formatter
-{
-    void format(details::log_msg& msg, const std::tm&) override
-    {
-        msg.formatted << *msg.logger_name;
-    }
-};
-}
-
-// log level appender
-class level_formatter:public flag_formatter
-{
-    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
-{
-    void format(details::log_msg& msg, const std::tm&) override
-    {
-        msg.formatted << level::to_short_str(msg.level);
-    }
-};
-
-///////////////////////////////////////////////////////////////////////
-// Date time pattern appenders
-///////////////////////////////////////////////////////////////////////
-
-static const char* ampm(const tm& t)
-{
-    return t.tm_hour >= 12 ? "PM" : "AM";
-}
-
-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
-{
-    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
-{
-    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
-{
-    void format(details::log_msg& msg, const std::tm& tm_time) override
-    {
-        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
-{
-    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)
-{
-    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)
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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
-{
-    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;
-        msg.formatted << fmt::pad(static_cast<int>(millis), 3, '0');
-    }
-};
-
-// microseconds
-class f_formatter:public flag_formatter
-{
-    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;
-        msg.formatted << fmt::pad(static_cast<int>(micros), 6, '0');
-    }
-};
-
-// nanoseconds
-class F_formatter:public flag_formatter
-{
-    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;
-        msg.formatted << fmt::pad(static_cast<int>(ns), 9, '0');
-    }
-};
-
-// AM/PM
-class p_formatter: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
-{
-    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
-{
-    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
-{
-    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
-{
-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;
-
-    void format(details::log_msg& msg, const std::tm& tm_time) override
-    {
-#ifdef _WIN32
-        int total_minutes = get_cached_offset(msg, tm_time);
-#else
-        // No need to chache under gcc,
-        // 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;
-        msg.formatted << sign;
-        pad_n_join(msg.formatted, h, m, ':');
-    }
-private:
-    log_clock::time_point _last_update;
-    int _offset_minutes;
-    std::mutex _mutex;
-
-    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)
-        {
-            _offset_minutes = os::utc_minutes_offset(tm_time);
-            _last_update = msg.time;
-        }
-        return _offset_minutes;
-    }
-};
-
-
-
-//Thread id
-class t_formatter:public flag_formatter
-{
-    void format(details::log_msg& msg, const std::tm&) override
-    {
-        msg.formatted << msg.thread_id;
-    }
-};
-
-
-class v_formatter: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
-{
-public:
-    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
-{
-public:
-    aggregate_formatter()
-    {}
-    void add_ch(char ch)
-    {
-        _str += ch;
-    }
-    void format(details::log_msg& msg, const std::tm&) override
-    {
-        msg.formatted << _str;
-    }
-private:
-    std::string _str;
-};
-
-// Full info formatter
-// pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] %v
-class full_formatter:public flag_formatter
-{
-    void format(details::log_msg& msg, const std::tm& tm_time) override
-    {
-#ifndef SPDLOG_NO_DATETIME
-        auto duration = msg.time.time_since_epoch();
-        auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() % 1000;
-
-        /* Slower version(while still very fast - about 3.2 million lines/sec under 10 threads),
-        msg.formatted.write("[{:d}-{:02d}-{:02d} {:02d}:{:02d}:{:02d}.{:03d}] [{}] [{}] {} ",
-        tm_time.tm_year + 1900,
-        tm_time.tm_mon + 1,
-        tm_time.tm_mday,
-        tm_time.tm_hour,
-        tm_time.tm_min,
-        tm_time.tm_sec,
-        static_cast<int>(millis),
-        msg.logger_name,
-        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') << '-'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_mday), 2, '0') << ' '
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_hour), 2, '0') << ':'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_min), 2, '0') << ':'
-                      << fmt::pad(static_cast<unsigned int>(tm_time.tm_sec), 2, '0') << '.'
-                      << fmt::pad(static_cast<unsigned int>(millis), 3, '0') << "] ";
-
-        //no datetime needed
-#else
-        (void)tm_time;
-#endif
-
-#ifndef SPDLOG_NO_NAME
-        msg.formatted << '[' << *msg.logger_name << "] ";
-#endif
-
-        msg.formatted << '[' << level::to_str(msg.level) << "] ";
-        msg.formatted << fmt::StringRef(msg.raw.data(), msg.raw.size());
-    }
-};
-
-}
-}
-///////////////////////////////////////////////////////////////////////////////
-// pattern_formatter inline impl
-///////////////////////////////////////////////////////////////////////////////
-inline spdlog::pattern_formatter::pattern_formatter(const std::string& pattern)
-{
-    compile_pattern(pattern);
-}
-
-inline void spdlog::pattern_formatter::compile_pattern(const std::string& pattern)
-{
-    auto end = pattern.end();
-    std::unique_ptr<details::aggregate_formatter> user_chars;
-    for (auto it = pattern.begin(); it != end; ++it)
-    {
-        if (*it == '%')
-        {
-            if (user_chars) //append user chars found so far
-                _formatters.push_back(std::move(user_chars));
-
-            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
-    {
-        _formatters.push_back(std::move(user_chars));
-    }
-
-}
-inline void spdlog::pattern_formatter::handle_flag(char flag)
-{
-    switch (flag)
-    {
-    // logger name
-    case 'n':
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::name_formatter()));
-        break;
-
-    case 'l':
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::level_formatter()));
-        break;
-
-    case 'L':
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::short_level_formatter()));
-        break;
-
-    case('t'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::t_formatter()));
-        break;
-
-    case('v'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::v_formatter()));
-        break;
-
-    case('a'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::a_formatter()));
-        break;
-
-    case('A'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::A_formatter()));
-        break;
-
-    case('b'):
-    case('h'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::b_formatter()));
-        break;
-
-    case('B'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::B_formatter()));
-        break;
-    case('c'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::c_formatter()));
-        break;
-
-    case('C'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::C_formatter()));
-        break;
-
-    case('Y'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::Y_formatter()));
-        break;
-
-    case('D'):
-    case('x'):
-
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::D_formatter()));
-        break;
-
-    case('m'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::m_formatter()));
-        break;
-
-    case('d'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::d_formatter()));
-        break;
-
-    case('H'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::H_formatter()));
-        break;
-
-    case('I'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::I_formatter()));
-        break;
-
-    case('M'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::M_formatter()));
-        break;
-
-    case('S'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::S_formatter()));
-        break;
-
-    case('e'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::e_formatter()));
-        break;
-
-    case('f'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::f_formatter()));
-        break;
-    case('F'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::F_formatter()));
-        break;
-
-    case('p'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::p_formatter()));
-        break;
-
-    case('r'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::r_formatter()));
-        break;
-
-    case('R'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::R_formatter()));
-        break;
-
-    case('T'):
-    case('X'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::T_formatter()));
-        break;
-
-    case('z'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(new details::z_formatter()));
-        break;
-
-    case ('+'):
-        _formatters.push_back(std::unique_ptr<details::flag_formatter>(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)));
-        break;
-    }
-}
-
-
-inline void spdlog::pattern_formatter::format(details::log_msg& msg)
-{
-
-#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);
-}

include/spdlog/details/periodic_worker-inl.h

@@ -0,0 +1,49 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/periodic_worker.h>
+#endif
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE periodic_worker::periodic_worker(const std::function<void()> &callback_fun, std::chrono::seconds interval)
+{
+    active_ = (interval > std::chrono::seconds::zero());
+    if (!active_)
+    {
+        return;
+    }
+
+    worker_thread_ = std::thread([this, callback_fun, interval]() {
+        for (;;)
+        {
+            std::unique_lock<std::mutex> lock(this->mutex_);
+            if (this->cv_.wait_for(lock, interval, [this] { return !this->active_; }))
+            {
+                return; // active_ == false, so exit this thread
+            }
+            callback_fun();
+        }
+    });
+}
+
+// stop the worker thread and join it
+SPDLOG_INLINE periodic_worker::~periodic_worker()
+{
+    if (worker_thread_.joinable())
+    {
+        {
+            std::lock_guard<std::mutex> lock(mutex_);
+            active_ = false;
+        }
+        cv_.notify_one();
+        worker_thread_.join();
+    }
+}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/periodic_worker.h

@@ -0,0 +1,40 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+// periodic worker thread - periodically executes the given callback function.
+//
+// RAII over the owned thread:
+//    creates the thread on construction.
+//    stops and joins the thread on destruction (if the thread is executing a callback, wait for it to finish first).
+
+#include <chrono>
+#include <condition_variable>
+#include <functional>
+#include <mutex>
+#include <thread>
+namespace spdlog {
+namespace details {
+
+class SPDLOG_API periodic_worker
+{
+public:
+    periodic_worker(const std::function<void()> &callback_fun, std::chrono::seconds interval);
+    periodic_worker(const periodic_worker &) = delete;
+    periodic_worker &operator=(const periodic_worker &) = delete;
+    // stop the worker thread and join it
+    ~periodic_worker();
+
+private:
+    bool active_;
+    std::thread worker_thread_;
+    std::mutex mutex_;
+    std::condition_variable cv_;
+};
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "periodic_worker-inl.h"
+#endif

include/spdlog/details/registry-inl.h

@@ -0,0 +1,313 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/registry.h>
+#endif
+
+#include <spdlog/common.h>
+#include <spdlog/details/periodic_worker.h>
+#include <spdlog/logger.h>
+#include <spdlog/pattern_formatter.h>
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+// support for the default stdout color logger
+#ifdef _WIN32
+#include <spdlog/sinks/wincolor_sink.h>
+#else
+#include <spdlog/sinks/ansicolor_sink.h>
+#endif
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
+
+#include <chrono>
+#include <functional>
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE registry::registry()
+    : formatter_(new pattern_formatter())
+{
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+    // create default logger (ansicolor_stdout_sink_mt or wincolor_stdout_sink_mt in windows).
+#ifdef _WIN32
+    auto color_sink = std::make_shared<sinks::wincolor_stdout_sink_mt>();
+#else
+    auto color_sink = std::make_shared<sinks::ansicolor_stdout_sink_mt>();
+#endif
+
+    const char *default_logger_name = "";
+    default_logger_ = std::make_shared<spdlog::logger>(default_logger_name, std::move(color_sink));
+    loggers_[default_logger_name] = default_logger_;
+
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
+}
+
+SPDLOG_INLINE registry::~registry() = default;
+
+SPDLOG_INLINE void registry::register_logger(std::shared_ptr<logger> new_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    register_logger_(std::move(new_logger));
+}
+
+SPDLOG_INLINE void registry::initialize_logger(std::shared_ptr<logger> new_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    new_logger->set_formatter(formatter_->clone());
+
+    if (err_handler_)
+    {
+        new_logger->set_error_handler(err_handler_);
+    }
+
+    // set new level according to previously configured level or default level
+    auto it = log_levels_.find(new_logger->name());
+    auto new_level = it != log_levels_.end() ? it->second : global_log_level_;
+    new_logger->set_level(new_level);
+
+    new_logger->flush_on(flush_level_);
+
+    if (backtrace_n_messages_ > 0)
+    {
+        new_logger->enable_backtrace(backtrace_n_messages_);
+    }
+
+    if (automatic_registration_)
+    {
+        register_logger_(std::move(new_logger));
+    }
+}
+
+SPDLOG_INLINE std::shared_ptr<logger> registry::get(const std::string &logger_name)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    auto found = loggers_.find(logger_name);
+    return found == loggers_.end() ? nullptr : found->second;
+}
+
+SPDLOG_INLINE std::shared_ptr<logger> registry::default_logger()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    return default_logger_;
+}
+
+// Return raw ptr to the default logger.
+// To be used directly by the spdlog default api (e.g. spdlog::info)
+// This make the default API faster, but cannot be used concurrently with set_default_logger().
+// e.g do not call set_default_logger() from one thread while calling spdlog::info() from another.
+SPDLOG_INLINE logger *registry::get_default_raw()
+{
+    return default_logger_.get();
+}
+
+// set default logger.
+// default logger is stored in default_logger_ (for faster retrieval) and in the loggers_ map.
+SPDLOG_INLINE void registry::set_default_logger(std::shared_ptr<logger> new_default_logger)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    // remove previous default logger from the map
+    if (default_logger_ != nullptr)
+    {
+        loggers_.erase(default_logger_->name());
+    }
+    if (new_default_logger != nullptr)
+    {
+        loggers_[new_default_logger->name()] = new_default_logger;
+    }
+    default_logger_ = std::move(new_default_logger);
+}
+
+SPDLOG_INLINE void registry::set_tp(std::shared_ptr<thread_pool> tp)
+{
+    std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+    tp_ = std::move(tp);
+}
+
+SPDLOG_INLINE std::shared_ptr<thread_pool> registry::get_tp()
+{
+    std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+    return tp_;
+}
+
+// Set global formatter. Each sink in each logger will get a clone of this object
+SPDLOG_INLINE void registry::set_formatter(std::unique_ptr<formatter> formatter)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    formatter_ = std::move(formatter);
+    for (auto &l : loggers_)
+    {
+        l.second->set_formatter(formatter_->clone());
+    }
+}
+
+SPDLOG_INLINE void registry::enable_backtrace(size_t n_messages)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    backtrace_n_messages_ = n_messages;
+
+    for (auto &l : loggers_)
+    {
+        l.second->enable_backtrace(n_messages);
+    }
+}
+
+SPDLOG_INLINE void registry::disable_backtrace()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    backtrace_n_messages_ = 0;
+    for (auto &l : loggers_)
+    {
+        l.second->disable_backtrace();
+    }
+}
+
+SPDLOG_INLINE void registry::set_level(level::level_enum log_level)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->set_level(log_level);
+    }
+    global_log_level_ = log_level;
+}
+
+SPDLOG_INLINE void registry::flush_on(level::level_enum log_level)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->flush_on(log_level);
+    }
+    flush_level_ = log_level;
+}
+
+SPDLOG_INLINE void registry::flush_every(std::chrono::seconds interval)
+{
+    std::lock_guard<std::mutex> lock(flusher_mutex_);
+    auto clbk = [this]() { this->flush_all(); };
+    periodic_flusher_ = details::make_unique<periodic_worker>(clbk, interval);
+}
+
+SPDLOG_INLINE void registry::set_error_handler(void (*handler)(const std::string &msg))
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->set_error_handler(handler);
+    }
+    err_handler_ = handler;
+}
+
+SPDLOG_INLINE void registry::apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        fun(l.second);
+    }
+}
+
+SPDLOG_INLINE void registry::flush_all()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    for (auto &l : loggers_)
+    {
+        l.second->flush();
+    }
+}
+
+SPDLOG_INLINE void registry::drop(const std::string &logger_name)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    loggers_.erase(logger_name);
+    if (default_logger_ && default_logger_->name() == logger_name)
+    {
+        default_logger_.reset();
+    }
+}
+
+SPDLOG_INLINE void registry::drop_all()
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    loggers_.clear();
+    default_logger_.reset();
+}
+
+// clean all resources and threads started by the registry
+SPDLOG_INLINE void registry::shutdown()
+{
+    {
+        std::lock_guard<std::mutex> lock(flusher_mutex_);
+        periodic_flusher_.reset();
+    }
+
+    drop_all();
+
+    {
+        std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+        tp_.reset();
+    }
+}
+
+SPDLOG_INLINE std::recursive_mutex &registry::tp_mutex()
+{
+    return tp_mutex_;
+}
+
+SPDLOG_INLINE void registry::set_automatic_registration(bool automatic_registration)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    automatic_registration_ = automatic_registration;
+}
+
+SPDLOG_INLINE void registry::set_levels(log_levels levels, level::level_enum *global_level)
+{
+    std::lock_guard<std::mutex> lock(logger_map_mutex_);
+    log_levels_ = std::move(levels);
+    auto global_level_requested = global_level != nullptr;
+    global_log_level_ = global_level_requested ? *global_level : global_log_level_;
+
+    for (auto &logger : loggers_)
+    {
+        auto logger_entry = log_levels_.find(logger.first);
+        if (logger_entry != log_levels_.end())
+        {
+            logger.second->set_level(logger_entry->second);
+        }
+        else if (global_level_requested)
+        {
+            logger.second->set_level(*global_level);
+        }
+    }
+}
+
+SPDLOG_INLINE registry &registry::instance()
+{
+    static registry s_instance;
+    return s_instance;
+}
+
+SPDLOG_INLINE void registry::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");
+    }
+}
+
+SPDLOG_INLINE void registry::register_logger_(std::shared_ptr<logger> new_logger)
+{
+    auto logger_name = new_logger->name();
+    throw_if_exists_(logger_name);
+    loggers_[logger_name] = std::move(new_logger);
+}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/registry.h

@@ -1,185 +1,115 @@
-//
-// Copyright(c) 2015 Gabi Melman.
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
 
 #pragma once
 
-// Loggers registy of unique name->logger pointer
-// An attempt to create a logger with an already existing name will be ignored
+// Loggers registry of unique name->logger pointer
+// An attempt to create a logger with an already existing name will result with spdlog_ex exception.
 // 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 <chrono>
 #include <functional>
 #include <memory>
-#include <mutex>
 #include <string>
 #include <unordered_map>
+#include <mutex>
 
-namespace spdlog
-{
-namespace details
-{
-template <class Mutex> class registry_t
+namespace spdlog {
+class logger;
+
+namespace details {
+class thread_pool;
+class periodic_worker;
+
+class SPDLOG_API registry
 {
 public:
+    using log_levels = std::unordered_map<std::string, level::level_enum>;
+    registry(const registry &) = delete;
+    registry &operator=(const registry &) = delete;
 
-    void register_logger(std::shared_ptr<logger> logger)
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        auto logger_name = logger->name();
-        throw_if_exists(logger_name);
-        _loggers[logger_name] = logger;
-    }
+    void register_logger(std::shared_ptr<logger> new_logger);
+    void initialize_logger(std::shared_ptr<logger> new_logger);
+    std::shared_ptr<logger> get(const std::string &logger_name);
+    std::shared_ptr<logger> default_logger();
 
+    // Return raw ptr to the default logger.
+    // To be used directly by the spdlog default api (e.g. spdlog::info)
+    // This make the default API faster, but cannot be used concurrently with set_default_logger().
+    // e.g do not call set_default_logger() from one thread while calling spdlog::info() from another.
+    logger *get_default_raw();
 
-    std::shared_ptr<logger> get(const std::string& logger_name)
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        auto found = _loggers.find(logger_name);
-        return found == _loggers.end() ? nullptr : found->second;
-    }
+    // set default logger.
+    // default logger is stored in default_logger_ (for faster retrieval) and in the loggers_ map.
+    void set_default_logger(std::shared_ptr<logger> new_default_logger);
 
-    template<class It>
-    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);
-        else
-            new_logger = std::make_shared<logger>(logger_name, sinks_begin, sinks_end);
+    void set_tp(std::shared_ptr<thread_pool> tp);
 
-        if (_formatter)
-            new_logger->set_formatter(_formatter);
+    std::shared_ptr<thread_pool> get_tp();
 
-        if (_err_handler)
-            new_logger->set_error_handler(_err_handler);
+    // Set global formatter. Each sink in each logger will get a clone of this object
+    void set_formatter(std::unique_ptr<formatter> formatter);
 
-        new_logger->set_level(_level);
+    void enable_backtrace(size_t n_messages);
 
+    void disable_backtrace();
 
-        //Add to registry
-        _loggers[logger_name] = new_logger;
-        return new_logger;
-    }
+    void set_level(level::level_enum log_level);
 
-    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 flush_on(level::level_enum log_level);
 
-    void drop(const std::string& logger_name)
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        _loggers.erase(logger_name);
-    }
+    void flush_every(std::chrono::seconds interval);
 
-    void drop_all()
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        _loggers.clear();
-    }
-    std::shared_ptr<logger> create(const std::string& logger_name, sinks_init_list sinks)
-    {
-        return create(logger_name, sinks.begin(), sinks.end());
-    }
+    void set_error_handler(void (*handler)(const std::string &msg));
 
-    std::shared_ptr<logger> create(const std::string& logger_name, sink_ptr sink)
-    {
-        return create(logger_name, { sink });
-    }
+    void apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun);
 
+    void flush_all();
 
-    void formatter(formatter_ptr f)
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        _formatter = f;
-        for (auto& l : _loggers)
-            l.second->set_formatter(_formatter);
-    }
+    void drop(const std::string &logger_name);
 
-    void set_pattern(const std::string& pattern)
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        _formatter = std::make_shared<pattern_formatter>(pattern);
-        for (auto& l : _loggers)
-            l.second->set_formatter(_formatter);
-    }
+    void drop_all();
 
-    void set_level(level::level_enum log_level)
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        for (auto& l : _loggers)
-            l.second->set_level(log_level);
-        _level = log_level;
-    }
+    // clean all resources and threads started by the registry
+    void shutdown();
 
-    void set_error_handler(log_err_handler handler)
-    {
-        for (auto& l : _loggers)
-            l.second->set_error_handler(handler);
-        _err_handler = handler;
-    }
+    std::recursive_mutex &tp_mutex();
 
-    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;
-        _async_q_size = q_size;
-        _overflow_policy = overflow_policy;
-        _worker_warmup_cb = worker_warmup_cb;
-        _flush_interval_ms = flush_interval_ms;
-        _worker_teardown_cb = worker_teardown_cb;
-    }
+    void set_automatic_registration(bool automatic_registration);
 
-    void set_sync_mode()
-    {
-        std::lock_guard<Mutex> lock(_mutex);
-        _async_mode = false;
-    }
+    // set levels for all existing/future loggers. global_level can be null if should not set.
+    void set_levels(log_levels levels, level::level_enum *global_level);
 
-    static registry_t<Mutex>& instance()
-    {
-        static registry_t<Mutex> s_instance;
-        return s_instance;
-    }
+    static registry &instance();
 
 private:
-    registry_t<Mutex>() {}
-    registry_t<Mutex>(const registry_t<Mutex>&) = delete;
-    registry_t<Mutex>& operator=(const registry_t<Mutex>&) = delete;
+    registry();
+    ~registry();
 
-    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;
-    formatter_ptr _formatter;
-    level::level_enum _level = level::info;
-    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;
+    void throw_if_exists_(const std::string &logger_name);
+    void register_logger_(std::shared_ptr<logger> new_logger);
+    bool set_level_from_cfg_(logger *logger);
+    std::mutex logger_map_mutex_, flusher_mutex_;
+    std::recursive_mutex tp_mutex_;
+    std::unordered_map<std::string, std::shared_ptr<logger>> loggers_;
+    log_levels log_levels_;
+    std::unique_ptr<formatter> formatter_;
+    spdlog::level::level_enum global_log_level_ = level::info;
+    level::level_enum flush_level_ = level::off;
+    void (*err_handler_)(const std::string &msg) = nullptr;
+    std::shared_ptr<thread_pool> tp_;
+    std::unique_ptr<periodic_worker> periodic_flusher_;
+    std::shared_ptr<logger> default_logger_;
+    bool automatic_registration_ = true;
+    size_t backtrace_n_messages_ = 0;
 };
-#ifdef SPDLOG_NO_REGISTRY_MUTEX
-typedef registry_t<spdlog::details::null_mutex> registry;
-#else
-typedef registry_t<std::mutex> registry;
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "registry-inl.h"
 #endif
-}
-}

include/spdlog/details/spdlog_impl.h

@@ -1,182 +0,0 @@
-//
-// Copyright(c) 2015 Gabi Melman.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-//
-
-#pragma once
-
-//
-// 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 <spdlog/sinks/android_sink.h>
-
-#include <chrono>
-#include <functional>
-#include <memory>
-#include <string>
-
-inline void spdlog::register_logger(std::shared_ptr<logger> logger)
-{
-    return details::registry::instance().register_logger(logger);
-}
-
-inline std::shared_ptr<spdlog::logger> spdlog::get(const std::string& name)
-{
-    return details::registry::instance().get(name);
-}
-
-inline void spdlog::drop(const std::string &name)
-{
-    details::registry::instance().drop(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 truncate)
-{
-    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 truncate)
-{
-    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)
-{
-    return create<spdlog::sinks::rotating_file_sink_mt>(logger_name, filename, SPDLOG_FILENAME_T("txt"), 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)
-{
-    return create<spdlog::sinks::rotating_file_sink_st>(logger_name, filename, SPDLOG_FILENAME_T("txt"), 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)
-{
-    return create<spdlog::sinks::daily_file_sink_mt>(logger_name, filename, SPDLOG_FILENAME_T("txt"), 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)
-{
-    return create<spdlog::sinks::daily_file_sink_st>(logger_name, filename, SPDLOG_FILENAME_T("txt"), 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)
-{
-    if (color) //use color wrapper sink
-        sink = std::make_shared<spdlog::sinks::ansicolor_sink>(sink);
-    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)
-{
-    return create_console_logger(logger_name, sinks::stdout_sink_mt::instance(), color);
-}
-
-inline std::shared_ptr<spdlog::logger> spdlog::stdout_logger_st(const std::string& logger_name, bool color)
-{
-    return create_console_logger(logger_name, sinks::stdout_sink_st::instance(), color);
-}
-
-inline std::shared_ptr<spdlog::logger> spdlog::stderr_logger_mt(const std::string& logger_name, bool color)
-{
-    return create_console_logger(logger_name, sinks::stderr_sink_mt::instance(), color);
-}
-
-inline std::shared_ptr<spdlog::logger> spdlog::stderr_logger_st(const std::string& logger_name, bool color)
-{
-    return create_console_logger(logger_name, sinks::stderr_sink_st::instance(), color);
-}
-
-#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)
-{
-    return create<spdlog::sinks::syslog_sink>(logger_name, syslog_ident, syslog_option);
-}
-#endif
-
-#if defined(__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)
-{
-    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)
-{
-    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)
-{
-    sink_ptr sink = std::make_shared<Sink>(args...);
-    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)
-{
-    return details::registry::instance().create(logger_name, sinks_begin, sinks_end);
-}
-
-inline void spdlog::set_formatter(spdlog::formatter_ptr f)
-{
-    details::registry::instance().formatter(f);
-}
-
-inline void spdlog::set_pattern(const std::string& format_string)
-{
-    return details::registry::instance().set_pattern(format_string);
-}
-
-inline void spdlog::set_level(level::level_enum log_level)
-{
-    return details::registry::instance().set_level(log_level);
-}
-
-inline void spdlog::set_error_handler(log_err_handler handler)
-{
-    return details::registry::instance().set_error_handler(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);
-}
-
-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(fun);
-}
-
-inline void spdlog::drop_all()
-{
-    details::registry::instance().drop_all();
-}

include/spdlog/details/synchronous_factory.h

@@ -0,0 +1,24 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include "registry.h"
+
+namespace spdlog {
+
+// Default logger factory-  creates synchronous loggers
+class logger;
+
+struct synchronous_factory
+{
+    template<typename Sink, typename... SinkArgs>
+    static std::shared_ptr<spdlog::logger> create(std::string logger_name, SinkArgs &&...args)
+    {
+        auto sink = std::make_shared<Sink>(std::forward<SinkArgs>(args)...);
+        auto new_logger = std::make_shared<spdlog::logger>(std::move(logger_name), std::move(sink));
+        details::registry::instance().initialize_logger(new_logger);
+        return new_logger;
+    }
+};
+} // namespace spdlog

include/spdlog/details/tcp_client-windows.h

@@ -0,0 +1,175 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#define WIN32_LEAN_AND_MEAN
+// tcp client helper
+#include <spdlog/common.h>
+#include <spdlog/details/os.h>
+
+#include <winsock2.h>
+#include <windows.h>
+#include <ws2tcpip.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string>
+
+#pragma comment(lib, "Ws2_32.lib")
+#pragma comment(lib, "Mswsock.lib")
+#pragma comment(lib, "AdvApi32.lib")
+
+namespace spdlog {
+namespace details {
+class tcp_client
+{
+    SOCKET socket_ = INVALID_SOCKET;
+
+    static bool winsock_initialized_()
+    {
+        SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+        if (s == INVALID_SOCKET)
+        {
+            return false;
+        }
+        else
+        {
+            closesocket(s);
+            return true;
+        }
+    }
+
+    static void init_winsock_()
+    {
+        WSADATA wsaData;
+        auto rv = WSAStartup(MAKEWORD(2, 2), &wsaData);
+        if (rv != 0)
+        {
+            throw_winsock_error_("WSAStartup failed", ::WSAGetLastError());
+        }
+    }
+
+    static void throw_winsock_error_(const std::string &msg, int last_error)
+    {
+        char buf[512];
+        ::FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, last_error,
+            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, (sizeof(buf) / sizeof(char)), NULL);
+
+        throw_spdlog_ex(fmt::format("tcp_sink - {}: {}", msg, buf));
+    }
+
+public:
+    bool is_connected() const
+    {
+        return socket_ != INVALID_SOCKET;
+    }
+
+    void close()
+    {
+        ::closesocket(socket_);
+        socket_ = INVALID_SOCKET;
+        WSACleanup();
+    }
+
+    SOCKET fd() const
+    {
+        return socket_;
+    }
+
+    ~tcp_client()
+    {
+        close();
+    }
+
+    // try to connect or throw on failure
+    void connect(const std::string &host, int port)
+    {
+        // initialize winsock if needed
+        if (!winsock_initialized_())
+        {
+            init_winsock_();
+        }
+
+        if (is_connected())
+        {
+            close();
+        }
+        struct addrinfo hints
+        {};
+        ZeroMemory(&hints, sizeof(hints));
+
+        hints.ai_family = AF_INET;       // IPv4
+        hints.ai_socktype = SOCK_STREAM; // TCP
+        hints.ai_flags = AI_NUMERICSERV; // port passed as as numeric value
+        hints.ai_protocol = 0;
+
+        auto port_str = std::to_string(port);
+        struct addrinfo *addrinfo_result;
+        auto rv = ::getaddrinfo(host.c_str(), port_str.c_str(), &hints, &addrinfo_result);
+        int last_error = 0;
+        if (rv != 0)
+        {
+            last_error = ::WSAGetLastError();
+            WSACleanup();
+            throw_winsock_error_("getaddrinfo failed", last_error);
+        }
+
+        // Try each address until we successfully connect(2).
+
+        for (auto *rp = addrinfo_result; rp != nullptr; rp = rp->ai_next)
+        {
+            socket_ = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+            if (socket_ == INVALID_SOCKET)
+            {
+                last_error = ::WSAGetLastError();
+                WSACleanup();
+                continue;
+            }
+            if (::connect(socket_, rp->ai_addr, (int)rp->ai_addrlen) == 0)
+            {
+                break;
+            }
+            else
+            {
+                last_error = ::WSAGetLastError();
+                close();
+            }
+        }
+        ::freeaddrinfo(addrinfo_result);
+        if (socket_ == INVALID_SOCKET)
+        {
+            WSACleanup();
+            throw_winsock_error_("connect failed", last_error);
+        }
+
+        // set TCP_NODELAY
+        int enable_flag = 1;
+        ::setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY, (char *)&enable_flag, sizeof(enable_flag));
+    }
+
+    // Send exactly n_bytes of the given data.
+    // On error close the connection and throw.
+    void send(const char *data, size_t n_bytes)
+    {
+        size_t bytes_sent = 0;
+        while (bytes_sent < n_bytes)
+        {
+            const int send_flags = 0;
+            auto write_result = ::send(socket_, data + bytes_sent, (int)(n_bytes - bytes_sent), send_flags);
+            if (write_result == SOCKET_ERROR)
+            {
+                int last_error = ::WSAGetLastError();
+                close();
+                throw_winsock_error_("send failed", last_error);
+            }
+
+            if (write_result == 0) // (probably should not happen but in any case..)
+            {
+                break;
+            }
+            bytes_sent += static_cast<size_t>(write_result);
+        }
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/tcp_client.h

@@ -0,0 +1,146 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifdef _WIN32
+#error include tcp_client-windows.h instead
+#endif
+
+// tcp client helper
+#include <spdlog/common.h>
+#include <spdlog/details/os.h>
+
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <netinet/tcp.h>
+
+#include <string>
+
+namespace spdlog {
+namespace details {
+class tcp_client
+{
+    int socket_ = -1;
+
+public:
+    bool is_connected() const
+    {
+        return socket_ != -1;
+    }
+
+    void close()
+    {
+        if (is_connected())
+        {
+            ::close(socket_);
+            socket_ = -1;
+        }
+    }
+
+    int fd() const
+    {
+        return socket_;
+    }
+
+    ~tcp_client()
+    {
+        close();
+    }
+
+    // try to connect or throw on failure
+    void connect(const std::string &host, int port)
+    {
+        close();
+        struct addrinfo hints
+        {};
+        memset(&hints, 0, sizeof(struct addrinfo));
+        hints.ai_family = AF_INET;       // IPv4
+        hints.ai_socktype = SOCK_STREAM; // TCP
+        hints.ai_flags = AI_NUMERICSERV; // port passed as as numeric value
+        hints.ai_protocol = 0;
+
+        auto port_str = std::to_string(port);
+        struct addrinfo *addrinfo_result;
+        auto rv = ::getaddrinfo(host.c_str(), port_str.c_str(), &hints, &addrinfo_result);
+        if (rv != 0)
+        {
+            auto msg = fmt::format("::getaddrinfo failed: {}", gai_strerror(rv));
+            throw_spdlog_ex(msg);
+        }
+
+        // Try each address until we successfully connect(2).
+        int last_errno = 0;
+        for (auto *rp = addrinfo_result; rp != nullptr; rp = rp->ai_next)
+        {
+#if defined(SOCK_CLOEXEC)
+            const int flags = SOCK_CLOEXEC;
+#else
+            const int flags = 0;
+#endif
+            socket_ = ::socket(rp->ai_family, rp->ai_socktype | flags, rp->ai_protocol);
+            if (socket_ == -1)
+            {
+                last_errno = errno;
+                continue;
+            }
+            rv = ::connect(socket_, rp->ai_addr, rp->ai_addrlen);
+            if (rv == 0)
+            {
+                break;
+            }
+            last_errno = errno;
+            ::close(socket_);
+            socket_ = -1;
+        }
+        ::freeaddrinfo(addrinfo_result);
+        if (socket_ == -1)
+        {
+            throw_spdlog_ex("::connect failed", last_errno);
+        }
+
+        // set TCP_NODELAY
+        int enable_flag = 1;
+        ::setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY, (char *)&enable_flag, sizeof(enable_flag));
+
+        // prevent sigpipe on systems where MSG_NOSIGNAL is not available
+#if defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL)
+        ::setsockopt(socket_, SOL_SOCKET, SO_NOSIGPIPE, (char *)&enable_flag, sizeof(enable_flag));
+#endif
+
+#if !defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL)
+#error "tcp_sink would raise SIGPIPE since niether SO_NOSIGPIPE nor MSG_NOSIGNAL are available"
+#endif
+    }
+
+    // Send exactly n_bytes of the given data.
+    // On error close the connection and throw.
+    void send(const char *data, size_t n_bytes)
+    {
+        size_t bytes_sent = 0;
+        while (bytes_sent < n_bytes)
+        {
+#if defined(MSG_NOSIGNAL)
+            const int send_flags = MSG_NOSIGNAL;
+#else
+            const int send_flags = 0;
+#endif
+            auto write_result = ::send(socket_, data + bytes_sent, n_bytes - bytes_sent, send_flags);
+            if (write_result < 0)
+            {
+                close();
+                throw_spdlog_ex("write(2) failed", errno);
+            }
+
+            if (write_result == 0) // (probably should not happen but in any case..)
+            {
+                break;
+            }
+            bytes_sent += static_cast<size_t>(write_result);
+        }
+    }
+};
+} // namespace details
+} // namespace spdlog

include/spdlog/details/thread_pool-inl.h

@@ -0,0 +1,129 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+#include <spdlog/details/thread_pool.h>
+#endif
+
+#include <spdlog/common.h>
+#include <cassert>
+
+namespace spdlog {
+namespace details {
+
+SPDLOG_INLINE thread_pool::thread_pool(size_t q_max_items, size_t threads_n, std::function<void()> on_thread_start)
+    : q_(q_max_items)
+{
+    if (threads_n == 0 || threads_n > 1000)
+    {
+        throw_spdlog_ex("spdlog::thread_pool(): invalid threads_n param (valid "
+                        "range is 1-1000)");
+    }
+    for (size_t i = 0; i < threads_n; i++)
+    {
+        threads_.emplace_back([this, on_thread_start] {
+            on_thread_start();
+            this->thread_pool::worker_loop_();
+        });
+    }
+}
+
+SPDLOG_INLINE thread_pool::thread_pool(size_t q_max_items, size_t threads_n)
+    : thread_pool(q_max_items, threads_n, [] {})
+{}
+
+// message all threads to terminate gracefully join them
+SPDLOG_INLINE thread_pool::~thread_pool()
+{
+    SPDLOG_TRY
+    {
+        for (size_t i = 0; i < threads_.size(); i++)
+        {
+            post_async_msg_(async_msg(async_msg_type::terminate), async_overflow_policy::block);
+        }
+
+        for (auto &t : threads_)
+        {
+            t.join();
+        }
+    }
+    SPDLOG_CATCH_ALL() {}
+}
+
+void SPDLOG_INLINE thread_pool::post_log(async_logger_ptr &&worker_ptr, const details::log_msg &msg, async_overflow_policy overflow_policy)
+{
+    async_msg async_m(std::move(worker_ptr), async_msg_type::log, msg);
+    post_async_msg_(std::move(async_m), overflow_policy);
+}
+
+void SPDLOG_INLINE thread_pool::post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy)
+{
+    post_async_msg_(async_msg(std::move(worker_ptr), async_msg_type::flush), overflow_policy);
+}
+
+size_t SPDLOG_INLINE thread_pool::overrun_counter()
+{
+    return q_.overrun_counter();
+}
+
+size_t SPDLOG_INLINE thread_pool::queue_size()
+{
+    return q_.size();
+}
+
+void SPDLOG_INLINE thread_pool::post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy)
+{
+    if (overflow_policy == async_overflow_policy::block)
+    {
+        q_.enqueue(std::move(new_msg));
+    }
+    else
+    {
+        q_.enqueue_nowait(std::move(new_msg));
+    }
+}
+
+void SPDLOG_INLINE thread_pool::worker_loop_()
+{
+    while (process_next_msg_()) {}
+}
+
+// process next message in the queue
+// return true if this thread should still be active (while no terminate msg
+// was received)
+bool SPDLOG_INLINE thread_pool::process_next_msg_()
+{
+    async_msg incoming_async_msg;
+    bool dequeued = q_.dequeue_for(incoming_async_msg, std::chrono::seconds(10));
+    if (!dequeued)
+    {
+        return true;
+    }
+
+    switch (incoming_async_msg.msg_type)
+    {
+    case async_msg_type::log: {
+        incoming_async_msg.worker_ptr->backend_sink_it_(incoming_async_msg);
+        return true;
+    }
+    case async_msg_type::flush: {
+        incoming_async_msg.worker_ptr->backend_flush_();
+        return true;
+    }
+
+    case async_msg_type::terminate: {
+        return false;
+    }
+
+    default: {
+        assert(false);
+    }
+    }
+
+    return true;
+}
+
+} // namespace details
+} // namespace spdlog

include/spdlog/details/thread_pool.h

@@ -0,0 +1,121 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#include <spdlog/details/log_msg_buffer.h>
+#include <spdlog/details/mpmc_blocking_q.h>
+#include <spdlog/details/os.h>
+
+#include <chrono>
+#include <memory>
+#include <thread>
+#include <vector>
+#include <functional>
+
+namespace spdlog {
+class async_logger;
+
+namespace details {
+
+using async_logger_ptr = std::shared_ptr<spdlog::async_logger>;
+
+enum class async_msg_type
+{
+    log,
+    flush,
+    terminate
+};
+
+#include <spdlog/details/log_msg_buffer.h>
+// Async msg to move to/from the queue
+// Movable only. should never be copied
+struct async_msg : log_msg_buffer
+{
+    async_msg_type msg_type{async_msg_type::log};
+    async_logger_ptr worker_ptr;
+
+    async_msg() = default;
+    ~async_msg() = default;
+
+    // should only be moved in or out of the queue..
+    async_msg(const async_msg &) = delete;
+
+// support for vs2013 move
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+    async_msg(async_msg &&other)
+        : log_msg_buffer(std::move(other))
+        , msg_type(other.msg_type)
+        , worker_ptr(std::move(other.worker_ptr))
+    {}
+
+    async_msg &operator=(async_msg &&other)
+    {
+        *static_cast<log_msg_buffer *>(this) = std::move(other);
+        msg_type = other.msg_type;
+        worker_ptr = std::move(other.worker_ptr);
+        return *this;
+    }
+#else // (_MSC_VER) && _MSC_VER <= 1800
+    async_msg(async_msg &&) = default;
+    async_msg &operator=(async_msg &&) = default;
+#endif
+
+    // construct from log_msg with given type
+    async_msg(async_logger_ptr &&worker, async_msg_type the_type, const details::log_msg &m)
+        : log_msg_buffer{m}
+        , msg_type{the_type}
+        , worker_ptr{std::move(worker)}
+    {}
+
+    async_msg(async_logger_ptr &&worker, async_msg_type the_type)
+        : log_msg_buffer{}
+        , msg_type{the_type}
+        , worker_ptr{std::move(worker)}
+    {}
+
+    explicit async_msg(async_msg_type the_type)
+        : async_msg{nullptr, the_type}
+    {}
+};
+
+class SPDLOG_API thread_pool
+{
+public:
+    using item_type = async_msg;
+    using q_type = details::mpmc_blocking_queue<item_type>;
+
+    thread_pool(size_t q_max_items, size_t threads_n, std::function<void()> on_thread_start);
+    thread_pool(size_t q_max_items, size_t threads_n);
+
+    // message all threads to terminate gracefully join them
+    ~thread_pool();
+
+    thread_pool(const thread_pool &) = delete;
+    thread_pool &operator=(thread_pool &&) = delete;
+
+    void post_log(async_logger_ptr &&worker_ptr, const details::log_msg &msg, async_overflow_policy overflow_policy);
+    void post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy);
+    size_t overrun_counter();
+    size_t queue_size();
+
+private:
+    q_type q_;
+
+    std::vector<std::thread> threads_;
+
+    void post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy);
+    void worker_loop_();
+
+    // process next message in the queue
+    // return true if this thread should still be active (while no terminate msg
+    // was received)
+    bool process_next_msg_();
+};
+
+} // namespace details
+} // namespace spdlog
+
+#ifdef SPDLOG_HEADER_ONLY
+#include "thread_pool-inl.h"
+#endif

include/spdlog/details/windows_include.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <windows.h>

include/spdlog/fmt/bin_to_hex.h

@@ -0,0 +1,216 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include <cctype>
+
+//
+// Support for logging binary data as hex
+// format flags, any combination of the followng:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+// {:a} - show ASCII if :n is not set
+
+//
+// Examples:
+//
+// std::vector<char> v(200, 0x0b);
+// logger->info("Some buffer {}", spdlog::to_hex(v));
+// char buf[128];
+// logger->info("Some buffer {:X}", spdlog::to_hex(std::begin(buf), std::end(buf)));
+// logger->info("Some buffer {:X}", spdlog::to_hex(std::begin(buf), std::end(buf), 16));
+
+namespace spdlog {
+namespace details {
+
+template<typename It>
+class dump_info
+{
+public:
+    dump_info(It range_begin, It range_end, size_t size_per_line)
+        : begin_(range_begin)
+        , end_(range_end)
+        , size_per_line_(size_per_line)
+    {}
+
+    It begin() const
+    {
+        return begin_;
+    }
+    It end() const
+    {
+        return end_;
+    }
+    size_t size_per_line() const
+    {
+        return size_per_line_;
+    }
+
+private:
+    It begin_, end_;
+    size_t size_per_line_;
+};
+} // namespace details
+
+// create a dump_info that wraps the given container
+template<typename Container>
+inline details::dump_info<typename Container::const_iterator> to_hex(const Container &container, size_t size_per_line = 32)
+{
+    static_assert(sizeof(typename Container::value_type) == 1, "sizeof(Container::value_type) != 1");
+    using Iter = typename Container::const_iterator;
+    return details::dump_info<Iter>(std::begin(container), std::end(container), size_per_line);
+}
+
+// create dump_info from ranges
+template<typename It>
+inline details::dump_info<It> to_hex(const It range_begin, const It range_end, size_t size_per_line = 32)
+{
+    return details::dump_info<It>(range_begin, range_end, size_per_line);
+}
+
+} // namespace spdlog
+
+namespace fmt {
+
+template<typename T>
+struct formatter<spdlog::details::dump_info<T>>
+{
+    const char delimiter = ' ';
+    bool put_newlines = true;
+    bool put_delimiters = true;
+    bool use_uppercase = false;
+    bool put_positions = true; // position on start of each line
+    bool show_ascii = false;
+
+    // parse the format string flags
+    template<typename ParseContext>
+    auto parse(ParseContext &ctx) -> decltype(ctx.begin())
+    {
+        auto it = ctx.begin();
+        while (it != ctx.end() && *it != '}')
+        {
+            switch (*it)
+            {
+            case 'X':
+                use_uppercase = true;
+                break;
+            case 's':
+                put_delimiters = false;
+                break;
+            case 'p':
+                put_positions = false;
+                break;
+            case 'n':
+                put_newlines = false;
+                show_ascii = false;
+                break;
+            case 'a':
+                if (put_newlines)
+                {
+                    show_ascii = true;
+                }
+                break;
+            }
+
+            ++it;
+        }
+        return it;
+    }
+
+    // format the given bytes range as hex
+    template<typename FormatContext, typename Container>
+    auto format(const spdlog::details::dump_info<Container> &the_range, FormatContext &ctx) -> decltype(ctx.out())
+    {
+        SPDLOG_CONSTEXPR const char *hex_upper = "0123456789ABCDEF";
+        SPDLOG_CONSTEXPR const char *hex_lower = "0123456789abcdef";
+        const char *hex_chars = use_uppercase ? hex_upper : hex_lower;
+
+#if FMT_VERSION < 60000
+        auto inserter = ctx.begin();
+#else
+        auto inserter = ctx.out();
+#endif
+
+        int size_per_line = static_cast<int>(the_range.size_per_line());
+        auto start_of_line = the_range.begin();
+        for (auto i = the_range.begin(); i != the_range.end(); i++)
+        {
+            auto ch = static_cast<unsigned char>(*i);
+
+            if (put_newlines && (i == the_range.begin() || i - start_of_line >= size_per_line))
+            {
+                if (show_ascii && i != the_range.begin())
+                {
+                    *inserter++ = delimiter;
+                    *inserter++ = delimiter;
+                    for (auto j = start_of_line; j < i; j++)
+                    {
+                        auto pc = static_cast<unsigned char>(*j);
+                        *inserter++ = std::isprint(pc) ? static_cast<char>(*j) : '.';
+                    }
+                }
+
+                put_newline(inserter, static_cast<size_t>(i - the_range.begin()));
+
+                // put first byte without delimiter in front of it
+                *inserter++ = hex_chars[(ch >> 4) & 0x0f];
+                *inserter++ = hex_chars[ch & 0x0f];
+                start_of_line = i;
+                continue;
+            }
+
+            if (put_delimiters)
+            {
+                *inserter++ = delimiter;
+            }
+
+            *inserter++ = hex_chars[(ch >> 4) & 0x0f];
+            *inserter++ = hex_chars[ch & 0x0f];
+        }
+        if (show_ascii) // add ascii to last line
+        {
+            if (the_range.end() - the_range.begin() > size_per_line)
+            {
+                auto blank_num = size_per_line - (the_range.end() - start_of_line);
+                while (blank_num-- > 0)
+                {
+                    *inserter++ = delimiter;
+                    *inserter++ = delimiter;
+                    if (put_delimiters)
+                    {
+                        *inserter++ = delimiter;
+                    }
+                }
+            }
+            *inserter++ = delimiter;
+            *inserter++ = delimiter;
+            for (auto j = start_of_line; j != the_range.end(); j++)
+            {
+                auto pc = static_cast<unsigned char>(*j);
+                *inserter++ = std::isprint(pc) ? static_cast<char>(*j) : '.';
+            }
+        }
+        return inserter;
+    }
+
+    // put newline(and position header)
+    template<typename It>
+    void put_newline(It inserter, std::size_t pos)
+    {
+#ifdef _WIN32
+        *inserter++ = '\r';
+#endif
+        *inserter++ = '\n';
+
+        if (put_positions)
+        {
+            fmt::format_to(inserter, "{:<04X}: ", pos);
+        }
+    }
+};
+} // namespace fmt

include/spdlog/fmt/bundled/LICENSE.rst

@@ -0,0 +1,27 @@
+Copyright (c) 2012 - present, Victor Zverovich
+
+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.
+
+--- Optional exception to the license ---
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into a machine-executable object form of such
+source code, you may redistribute such embedded portions in such object form
+without including the above copyright and permission notices.

include/spdlog/fmt/bundled/color.h

@@ -0,0 +1,603 @@
+// Formatting library for C++ - color support
+//
+// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COLOR_H_
+#define FMT_COLOR_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+enum class color : uint32_t {
+  alice_blue = 0xF0F8FF,               // rgb(240,248,255)
+  antique_white = 0xFAEBD7,            // rgb(250,235,215)
+  aqua = 0x00FFFF,                     // rgb(0,255,255)
+  aquamarine = 0x7FFFD4,               // rgb(127,255,212)
+  azure = 0xF0FFFF,                    // rgb(240,255,255)
+  beige = 0xF5F5DC,                    // rgb(245,245,220)
+  bisque = 0xFFE4C4,                   // rgb(255,228,196)
+  black = 0x000000,                    // rgb(0,0,0)
+  blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
+  blue = 0x0000FF,                     // rgb(0,0,255)
+  blue_violet = 0x8A2BE2,              // rgb(138,43,226)
+  brown = 0xA52A2A,                    // rgb(165,42,42)
+  burly_wood = 0xDEB887,               // rgb(222,184,135)
+  cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
+  chartreuse = 0x7FFF00,               // rgb(127,255,0)
+  chocolate = 0xD2691E,                // rgb(210,105,30)
+  coral = 0xFF7F50,                    // rgb(255,127,80)
+  cornflower_blue = 0x6495ED,          // rgb(100,149,237)
+  cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
+  crimson = 0xDC143C,                  // rgb(220,20,60)
+  cyan = 0x00FFFF,                     // rgb(0,255,255)
+  dark_blue = 0x00008B,                // rgb(0,0,139)
+  dark_cyan = 0x008B8B,                // rgb(0,139,139)
+  dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
+  dark_gray = 0xA9A9A9,                // rgb(169,169,169)
+  dark_green = 0x006400,               // rgb(0,100,0)
+  dark_khaki = 0xBDB76B,               // rgb(189,183,107)
+  dark_magenta = 0x8B008B,             // rgb(139,0,139)
+  dark_olive_green = 0x556B2F,         // rgb(85,107,47)
+  dark_orange = 0xFF8C00,              // rgb(255,140,0)
+  dark_orchid = 0x9932CC,              // rgb(153,50,204)
+  dark_red = 0x8B0000,                 // rgb(139,0,0)
+  dark_salmon = 0xE9967A,              // rgb(233,150,122)
+  dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
+  dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
+  dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
+  dark_turquoise = 0x00CED1,           // rgb(0,206,209)
+  dark_violet = 0x9400D3,              // rgb(148,0,211)
+  deep_pink = 0xFF1493,                // rgb(255,20,147)
+  deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
+  dim_gray = 0x696969,                 // rgb(105,105,105)
+  dodger_blue = 0x1E90FF,              // rgb(30,144,255)
+  fire_brick = 0xB22222,               // rgb(178,34,34)
+  floral_white = 0xFFFAF0,             // rgb(255,250,240)
+  forest_green = 0x228B22,             // rgb(34,139,34)
+  fuchsia = 0xFF00FF,                  // rgb(255,0,255)
+  gainsboro = 0xDCDCDC,                // rgb(220,220,220)
+  ghost_white = 0xF8F8FF,              // rgb(248,248,255)
+  gold = 0xFFD700,                     // rgb(255,215,0)
+  golden_rod = 0xDAA520,               // rgb(218,165,32)
+  gray = 0x808080,                     // rgb(128,128,128)
+  green = 0x008000,                    // rgb(0,128,0)
+  green_yellow = 0xADFF2F,             // rgb(173,255,47)
+  honey_dew = 0xF0FFF0,                // rgb(240,255,240)
+  hot_pink = 0xFF69B4,                 // rgb(255,105,180)
+  indian_red = 0xCD5C5C,               // rgb(205,92,92)
+  indigo = 0x4B0082,                   // rgb(75,0,130)
+  ivory = 0xFFFFF0,                    // rgb(255,255,240)
+  khaki = 0xF0E68C,                    // rgb(240,230,140)
+  lavender = 0xE6E6FA,                 // rgb(230,230,250)
+  lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
+  lawn_green = 0x7CFC00,               // rgb(124,252,0)
+  lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
+  light_blue = 0xADD8E6,               // rgb(173,216,230)
+  light_coral = 0xF08080,              // rgb(240,128,128)
+  light_cyan = 0xE0FFFF,               // rgb(224,255,255)
+  light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
+  light_gray = 0xD3D3D3,               // rgb(211,211,211)
+  light_green = 0x90EE90,              // rgb(144,238,144)
+  light_pink = 0xFFB6C1,               // rgb(255,182,193)
+  light_salmon = 0xFFA07A,             // rgb(255,160,122)
+  light_sea_green = 0x20B2AA,          // rgb(32,178,170)
+  light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
+  light_slate_gray = 0x778899,         // rgb(119,136,153)
+  light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
+  light_yellow = 0xFFFFE0,             // rgb(255,255,224)
+  lime = 0x00FF00,                     // rgb(0,255,0)
+  lime_green = 0x32CD32,               // rgb(50,205,50)
+  linen = 0xFAF0E6,                    // rgb(250,240,230)
+  magenta = 0xFF00FF,                  // rgb(255,0,255)
+  maroon = 0x800000,                   // rgb(128,0,0)
+  medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
+  medium_blue = 0x0000CD,              // rgb(0,0,205)
+  medium_orchid = 0xBA55D3,            // rgb(186,85,211)
+  medium_purple = 0x9370DB,            // rgb(147,112,219)
+  medium_sea_green = 0x3CB371,         // rgb(60,179,113)
+  medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
+  medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
+  medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
+  medium_violet_red = 0xC71585,        // rgb(199,21,133)
+  midnight_blue = 0x191970,            // rgb(25,25,112)
+  mint_cream = 0xF5FFFA,               // rgb(245,255,250)
+  misty_rose = 0xFFE4E1,               // rgb(255,228,225)
+  moccasin = 0xFFE4B5,                 // rgb(255,228,181)
+  navajo_white = 0xFFDEAD,             // rgb(255,222,173)
+  navy = 0x000080,                     // rgb(0,0,128)
+  old_lace = 0xFDF5E6,                 // rgb(253,245,230)
+  olive = 0x808000,                    // rgb(128,128,0)
+  olive_drab = 0x6B8E23,               // rgb(107,142,35)
+  orange = 0xFFA500,                   // rgb(255,165,0)
+  orange_red = 0xFF4500,               // rgb(255,69,0)
+  orchid = 0xDA70D6,                   // rgb(218,112,214)
+  pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
+  pale_green = 0x98FB98,               // rgb(152,251,152)
+  pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
+  pale_violet_red = 0xDB7093,          // rgb(219,112,147)
+  papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
+  peach_puff = 0xFFDAB9,               // rgb(255,218,185)
+  peru = 0xCD853F,                     // rgb(205,133,63)
+  pink = 0xFFC0CB,                     // rgb(255,192,203)
+  plum = 0xDDA0DD,                     // rgb(221,160,221)
+  powder_blue = 0xB0E0E6,              // rgb(176,224,230)
+  purple = 0x800080,                   // rgb(128,0,128)
+  rebecca_purple = 0x663399,           // rgb(102,51,153)
+  red = 0xFF0000,                      // rgb(255,0,0)
+  rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
+  royal_blue = 0x4169E1,               // rgb(65,105,225)
+  saddle_brown = 0x8B4513,             // rgb(139,69,19)
+  salmon = 0xFA8072,                   // rgb(250,128,114)
+  sandy_brown = 0xF4A460,              // rgb(244,164,96)
+  sea_green = 0x2E8B57,                // rgb(46,139,87)
+  sea_shell = 0xFFF5EE,                // rgb(255,245,238)
+  sienna = 0xA0522D,                   // rgb(160,82,45)
+  silver = 0xC0C0C0,                   // rgb(192,192,192)
+  sky_blue = 0x87CEEB,                 // rgb(135,206,235)
+  slate_blue = 0x6A5ACD,               // rgb(106,90,205)
+  slate_gray = 0x708090,               // rgb(112,128,144)
+  snow = 0xFFFAFA,                     // rgb(255,250,250)
+  spring_green = 0x00FF7F,             // rgb(0,255,127)
+  steel_blue = 0x4682B4,               // rgb(70,130,180)
+  tan = 0xD2B48C,                      // rgb(210,180,140)
+  teal = 0x008080,                     // rgb(0,128,128)
+  thistle = 0xD8BFD8,                  // rgb(216,191,216)
+  tomato = 0xFF6347,                   // rgb(255,99,71)
+  turquoise = 0x40E0D0,                // rgb(64,224,208)
+  violet = 0xEE82EE,                   // rgb(238,130,238)
+  wheat = 0xF5DEB3,                    // rgb(245,222,179)
+  white = 0xFFFFFF,                    // rgb(255,255,255)
+  white_smoke = 0xF5F5F5,              // rgb(245,245,245)
+  yellow = 0xFFFF00,                   // rgb(255,255,0)
+  yellow_green = 0x9ACD32              // rgb(154,205,50)
+};                                     // enum class color
+
+enum class terminal_color : uint8_t {
+  black = 30,
+  red,
+  green,
+  yellow,
+  blue,
+  magenta,
+  cyan,
+  white,
+  bright_black = 90,
+  bright_red,
+  bright_green,
+  bright_yellow,
+  bright_blue,
+  bright_magenta,
+  bright_cyan,
+  bright_white
+};
+
+enum class emphasis : uint8_t {
+  bold = 1,
+  italic = 1 << 1,
+  underline = 1 << 2,
+  strikethrough = 1 << 3
+};
+
+// rgb is a struct for red, green and blue colors.
+// Using the name "rgb" makes some editors show the color in a tooltip.
+struct rgb {
+  FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
+  FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
+  FMT_CONSTEXPR rgb(uint32_t hex)
+      : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
+  FMT_CONSTEXPR rgb(color hex)
+      : r((uint32_t(hex) >> 16) & 0xFF),
+        g((uint32_t(hex) >> 8) & 0xFF),
+        b(uint32_t(hex) & 0xFF) {}
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+};
+
+namespace detail {
+
+// color is a struct of either a rgb color or a terminal color.
+struct color_type {
+  FMT_CONSTEXPR color_type() FMT_NOEXCEPT : is_rgb(), value{} {}
+  FMT_CONSTEXPR color_type(color rgb_color) FMT_NOEXCEPT : is_rgb(true),
+                                                           value{} {
+    value.rgb_color = static_cast<uint32_t>(rgb_color);
+  }
+  FMT_CONSTEXPR color_type(rgb rgb_color) FMT_NOEXCEPT : is_rgb(true), value{} {
+    value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
+                      (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
+  }
+  FMT_CONSTEXPR color_type(terminal_color term_color) FMT_NOEXCEPT : is_rgb(),
+                                                                     value{} {
+    value.term_color = static_cast<uint8_t>(term_color);
+  }
+  bool is_rgb;
+  union color_union {
+    uint8_t term_color;
+    uint32_t rgb_color;
+  } value;
+};
+}  // namespace detail
+
+// Experimental text formatting support.
+class text_style {
+ public:
+  FMT_CONSTEXPR text_style(emphasis em = emphasis()) FMT_NOEXCEPT
+      : set_foreground_color(),
+        set_background_color(),
+        ems(em) {}
+
+  FMT_CONSTEXPR text_style& operator|=(const text_style& rhs) {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        FMT_THROW(format_error("can't OR a terminal color"));
+      foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        FMT_THROW(format_error("can't OR a terminal color"));
+      background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR text_style operator|(text_style lhs,
+                                            const text_style& rhs) {
+    return lhs |= rhs;
+  }
+
+  FMT_CONSTEXPR text_style& operator&=(const text_style& rhs) {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        FMT_THROW(format_error("can't AND a terminal color"));
+      foreground_color.value.rgb_color &= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        FMT_THROW(format_error("can't AND a terminal color"));
+      background_color.value.rgb_color &= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) &
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR text_style operator&(text_style lhs,
+                                            const text_style& rhs) {
+    return lhs &= rhs;
+  }
+
+  FMT_CONSTEXPR bool has_foreground() const FMT_NOEXCEPT {
+    return set_foreground_color;
+  }
+  FMT_CONSTEXPR bool has_background() const FMT_NOEXCEPT {
+    return set_background_color;
+  }
+  FMT_CONSTEXPR bool has_emphasis() const FMT_NOEXCEPT {
+    return static_cast<uint8_t>(ems) != 0;
+  }
+  FMT_CONSTEXPR detail::color_type get_foreground() const FMT_NOEXCEPT {
+    FMT_ASSERT(has_foreground(), "no foreground specified for this style");
+    return foreground_color;
+  }
+  FMT_CONSTEXPR detail::color_type get_background() const FMT_NOEXCEPT {
+    FMT_ASSERT(has_background(), "no background specified for this style");
+    return background_color;
+  }
+  FMT_CONSTEXPR emphasis get_emphasis() const FMT_NOEXCEPT {
+    FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
+    return ems;
+  }
+
+ private:
+  FMT_CONSTEXPR text_style(bool is_foreground,
+                           detail::color_type text_color) FMT_NOEXCEPT
+      : set_foreground_color(),
+        set_background_color(),
+        ems() {
+    if (is_foreground) {
+      foreground_color = text_color;
+      set_foreground_color = true;
+    } else {
+      background_color = text_color;
+      set_background_color = true;
+    }
+  }
+
+  friend FMT_CONSTEXPR_DECL text_style fg(detail::color_type foreground)
+      FMT_NOEXCEPT;
+  friend FMT_CONSTEXPR_DECL text_style bg(detail::color_type background)
+      FMT_NOEXCEPT;
+
+  detail::color_type foreground_color;
+  detail::color_type background_color;
+  bool set_foreground_color;
+  bool set_background_color;
+  emphasis ems;
+};
+
+FMT_CONSTEXPR text_style fg(detail::color_type foreground) FMT_NOEXCEPT {
+  return text_style(/*is_foreground=*/true, foreground);
+}
+
+FMT_CONSTEXPR text_style bg(detail::color_type background) FMT_NOEXCEPT {
+  return text_style(/*is_foreground=*/false, background);
+}
+
+FMT_CONSTEXPR text_style operator|(emphasis lhs, emphasis rhs) FMT_NOEXCEPT {
+  return text_style(lhs) | rhs;
+}
+
+namespace detail {
+
+template <typename Char> struct ansi_color_escape {
+  FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
+                                  const char* esc) FMT_NOEXCEPT {
+    // If we have a terminal color, we need to output another escape code
+    // sequence.
+    if (!text_color.is_rgb) {
+      bool is_background = esc == detail::data::background_color;
+      uint32_t value = text_color.value.term_color;
+      // Background ASCII codes are the same as the foreground ones but with
+      // 10 more.
+      if (is_background) value += 10u;
+
+      size_t index = 0;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+
+      if (value >= 100u) {
+        buffer[index++] = static_cast<Char>('1');
+        value %= 100u;
+      }
+      buffer[index++] = static_cast<Char>('0' + value / 10u);
+      buffer[index++] = static_cast<Char>('0' + value % 10u);
+
+      buffer[index++] = static_cast<Char>('m');
+      buffer[index++] = static_cast<Char>('\0');
+      return;
+    }
+
+    for (int i = 0; i < 7; i++) {
+      buffer[i] = static_cast<Char>(esc[i]);
+    }
+    rgb color(text_color.value.rgb_color);
+    to_esc(color.r, buffer + 7, ';');
+    to_esc(color.g, buffer + 11, ';');
+    to_esc(color.b, buffer + 15, 'm');
+    buffer[19] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR ansi_color_escape(emphasis em) FMT_NOEXCEPT {
+    uint8_t em_codes[4] = {};
+    uint8_t em_bits = static_cast<uint8_t>(em);
+    if (em_bits & static_cast<uint8_t>(emphasis::bold)) em_codes[0] = 1;
+    if (em_bits & static_cast<uint8_t>(emphasis::italic)) em_codes[1] = 3;
+    if (em_bits & static_cast<uint8_t>(emphasis::underline)) em_codes[2] = 4;
+    if (em_bits & static_cast<uint8_t>(emphasis::strikethrough))
+      em_codes[3] = 9;
+
+    size_t index = 0;
+    for (int i = 0; i < 4; ++i) {
+      if (!em_codes[i]) continue;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+      buffer[index++] = static_cast<Char>('0' + em_codes[i]);
+      buffer[index++] = static_cast<Char>('m');
+    }
+    buffer[index++] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR operator const Char*() const FMT_NOEXCEPT { return buffer; }
+
+  FMT_CONSTEXPR const Char* begin() const FMT_NOEXCEPT { return buffer; }
+  FMT_CONSTEXPR const Char* end() const FMT_NOEXCEPT {
+    return buffer + std::char_traits<Char>::length(buffer);
+  }
+
+ private:
+  Char buffer[7u + 3u * 4u + 1u];
+
+  static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
+                                   char delimiter) FMT_NOEXCEPT {
+    out[0] = static_cast<Char>('0' + c / 100);
+    out[1] = static_cast<Char>('0' + c / 10 % 10);
+    out[2] = static_cast<Char>('0' + c % 10);
+    out[3] = static_cast<Char>(delimiter);
+  }
+};
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
+    detail::color_type foreground) FMT_NOEXCEPT {
+  return ansi_color_escape<Char>(foreground, detail::data::foreground_color);
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
+    detail::color_type background) FMT_NOEXCEPT {
+  return ansi_color_escape<Char>(background, detail::data::background_color);
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_emphasis(emphasis em) FMT_NOEXCEPT {
+  return ansi_color_escape<Char>(em);
+}
+
+template <typename Char>
+inline void fputs(const Char* chars, FILE* stream) FMT_NOEXCEPT {
+  std::fputs(chars, stream);
+}
+
+template <>
+inline void fputs<wchar_t>(const wchar_t* chars, FILE* stream) FMT_NOEXCEPT {
+  std::fputws(chars, stream);
+}
+
+template <typename Char> inline void reset_color(FILE* stream) FMT_NOEXCEPT {
+  fputs(detail::data::reset_color, stream);
+}
+
+template <> inline void reset_color<wchar_t>(FILE* stream) FMT_NOEXCEPT {
+  fputs(detail::data::wreset_color, stream);
+}
+
+template <typename Char>
+inline void reset_color(buffer<Char>& buffer) FMT_NOEXCEPT {
+  const char* begin = data::reset_color;
+  const char* end = begin + sizeof(data::reset_color) - 1;
+  buffer.append(begin, end);
+}
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, const text_style& ts,
+                basic_string_view<Char> format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  bool has_style = false;
+  if (ts.has_emphasis()) {
+    has_style = true;
+    auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+    buf.append(emphasis.begin(), emphasis.end());
+  }
+  if (ts.has_foreground()) {
+    has_style = true;
+    auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
+    buf.append(foreground.begin(), foreground.end());
+  }
+  if (ts.has_background()) {
+    has_style = true;
+    auto background = detail::make_background_color<Char>(ts.get_background());
+    buf.append(background.begin(), background.end());
+  }
+  detail::vformat_to(buf, format_str, args);
+  if (has_style) detail::reset_color<Char>(buf);
+}
+}  // namespace detail
+
+template <typename S, typename Char = char_t<S>>
+void vprint(std::FILE* f, const text_style& ts, const S& format,
+            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  basic_memory_buffer<Char> buf;
+  detail::vformat_to(buf, ts, to_string_view(format), args);
+  buf.push_back(Char(0));
+  detail::fputs(buf.data(), f);
+}
+
+/**
+  \rst
+  Formats a string and prints it to the specified file stream using ANSI
+  escape sequences to specify text formatting.
+
+  **Example**::
+
+    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+               "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(std::FILE* f, const text_style& ts, const S& format_str,
+           const Args&... args) {
+  vprint(f, ts, format_str,
+         fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+/**
+  Formats a string and prints it to stdout using ANSI escape sequences to
+  specify text formatting.
+  Example:
+    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+               "Elapsed time: {0:.2f} seconds", 1.23);
+ */
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(const text_style& ts, const S& format_str, const Args&... args) {
+  return print(stdout, ts, format_str, args...);
+}
+
+template <typename S, typename Char = char_t<S>>
+inline std::basic_string<Char> vformat(
+    const text_style& ts, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  basic_memory_buffer<Char> buf;
+  detail::vformat_to(buf, ts, to_string_view(format_str), args);
+  return fmt::to_string(buf);
+}
+
+/**
+  \rst
+  Formats arguments and returns the result as a string using ANSI
+  escape sequences to specify text formatting.
+
+  **Example**::
+
+    #include <fmt/color.h>
+    std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
+                                      "The answer is {}", 42);
+  \endrst
+*/
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
+                                      const Args&... args) {
+  return vformat(ts, to_string_view(format_str),
+                 fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+/**
+  Formats a string with the given text_style and writes the output to ``out``.
+ */
+template <typename OutputIt, typename Char,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+OutputIt vformat_to(
+    OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
+  detail::vformat_to(buf, ts, format_str, args);
+  return detail::get_iterator(buf);
+}
+
+/**
+  \rst
+  Formats arguments with the given text_style, writes the result to the output
+  iterator ``out`` and returns the iterator past the end of the output range.
+
+  **Example**::
+
+    std::vector<char> out;
+    fmt::format_to(std::back_inserter(out),
+                   fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
+  \endrst
+*/
+template <typename OutputIt, typename S, typename... Args,
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
+              detail::is_string<S>::value>
+inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  return vformat_to(out, ts, to_string_view(format_str),
+                    fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_COLOR_H_

include/spdlog/fmt/bundled/compile.h

@@ -0,0 +1,701 @@
+// Formatting library for C++ - experimental format string compilation
+//
+// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COMPILE_H_
+#define FMT_COMPILE_H_
+
+#include <vector>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+// A compile-time string which is compiled into fast formatting code.
+class compiled_string {};
+
+template <typename S>
+struct is_compiled_string : std::is_base_of<compiled_string, S> {};
+
+/**
+  \rst
+  Converts a string literal *s* into a format string that will be parsed at
+  compile time and converted into efficient formatting code. Requires C++17
+  ``constexpr if`` compiler support.
+
+  **Example**::
+
+    // Converts 42 into std::string using the most efficient method and no
+    // runtime format string processing.
+    std::string s = fmt::format(FMT_COMPILE("{}"), 42);
+  \endrst
+ */
+#define FMT_COMPILE(s) FMT_STRING_IMPL(s, fmt::detail::compiled_string)
+
+template <typename T, typename... Tail>
+const T& first(const T& value, const Tail&...) {
+  return value;
+}
+
+// Part of a compiled format string. It can be either literal text or a
+// replacement field.
+template <typename Char> struct format_part {
+  enum class kind { arg_index, arg_name, text, replacement };
+
+  struct replacement {
+    arg_ref<Char> arg_id;
+    dynamic_format_specs<Char> specs;
+  };
+
+  kind part_kind;
+  union value {
+    int arg_index;
+    basic_string_view<Char> str;
+    replacement repl;
+
+    FMT_CONSTEXPR value(int index = 0) : arg_index(index) {}
+    FMT_CONSTEXPR value(basic_string_view<Char> s) : str(s) {}
+    FMT_CONSTEXPR value(replacement r) : repl(r) {}
+  } val;
+  // Position past the end of the argument id.
+  const Char* arg_id_end = nullptr;
+
+  FMT_CONSTEXPR format_part(kind k = kind::arg_index, value v = {})
+      : part_kind(k), val(v) {}
+
+  static FMT_CONSTEXPR format_part make_arg_index(int index) {
+    return format_part(kind::arg_index, index);
+  }
+  static FMT_CONSTEXPR format_part make_arg_name(basic_string_view<Char> name) {
+    return format_part(kind::arg_name, name);
+  }
+  static FMT_CONSTEXPR format_part make_text(basic_string_view<Char> text) {
+    return format_part(kind::text, text);
+  }
+  static FMT_CONSTEXPR format_part make_replacement(replacement repl) {
+    return format_part(kind::replacement, repl);
+  }
+};
+
+template <typename Char> struct part_counter {
+  unsigned num_parts = 0;
+
+  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
+    if (begin != end) ++num_parts;
+  }
+
+  FMT_CONSTEXPR int on_arg_id() { return ++num_parts, 0; }
+  FMT_CONSTEXPR int on_arg_id(int) { return ++num_parts, 0; }
+  FMT_CONSTEXPR int on_arg_id(basic_string_view<Char>) {
+    return ++num_parts, 0;
+  }
+
+  FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
+
+  FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
+                                            const Char* end) {
+    // Find the matching brace.
+    unsigned brace_counter = 0;
+    for (; begin != end; ++begin) {
+      if (*begin == '{') {
+        ++brace_counter;
+      } else if (*begin == '}') {
+        if (brace_counter == 0u) break;
+        --brace_counter;
+      }
+    }
+    return begin;
+  }
+
+  FMT_CONSTEXPR void on_error(const char*) {}
+};
+
+// Counts the number of parts in a format string.
+template <typename Char>
+FMT_CONSTEXPR unsigned count_parts(basic_string_view<Char> format_str) {
+  part_counter<Char> counter;
+  parse_format_string<true>(format_str, counter);
+  return counter.num_parts;
+}
+
+template <typename Char, typename PartHandler>
+class format_string_compiler : public error_handler {
+ private:
+  using part = format_part<Char>;
+
+  PartHandler handler_;
+  part part_;
+  basic_string_view<Char> format_str_;
+  basic_format_parse_context<Char> parse_context_;
+
+ public:
+  FMT_CONSTEXPR format_string_compiler(basic_string_view<Char> format_str,
+                                       PartHandler handler)
+      : handler_(handler),
+        format_str_(format_str),
+        parse_context_(format_str) {}
+
+  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
+    if (begin != end)
+      handler_(part::make_text({begin, to_unsigned(end - begin)}));
+  }
+
+  FMT_CONSTEXPR int on_arg_id() {
+    part_ = part::make_arg_index(parse_context_.next_arg_id());
+    return 0;
+  }
+
+  FMT_CONSTEXPR int on_arg_id(int id) {
+    parse_context_.check_arg_id(id);
+    part_ = part::make_arg_index(id);
+    return 0;
+  }
+
+  FMT_CONSTEXPR int on_arg_id(basic_string_view<Char> id) {
+    part_ = part::make_arg_name(id);
+    return 0;
+  }
+
+  FMT_CONSTEXPR void on_replacement_field(int, const Char* ptr) {
+    part_.arg_id_end = ptr;
+    handler_(part_);
+  }
+
+  FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
+                                            const Char* end) {
+    auto repl = typename part::replacement();
+    dynamic_specs_handler<basic_format_parse_context<Char>> handler(
+        repl.specs, parse_context_);
+    auto it = parse_format_specs(begin, end, handler);
+    if (*it != '}') on_error("missing '}' in format string");
+    repl.arg_id = part_.part_kind == part::kind::arg_index
+                      ? arg_ref<Char>(part_.val.arg_index)
+                      : arg_ref<Char>(part_.val.str);
+    auto part = part::make_replacement(repl);
+    part.arg_id_end = begin;
+    handler_(part);
+    return it;
+  }
+};
+
+// Compiles a format string and invokes handler(part) for each parsed part.
+template <bool IS_CONSTEXPR, typename Char, typename PartHandler>
+FMT_CONSTEXPR void compile_format_string(basic_string_view<Char> format_str,
+                                         PartHandler handler) {
+  parse_format_string<IS_CONSTEXPR>(
+      format_str,
+      format_string_compiler<Char, PartHandler>(format_str, handler));
+}
+
+template <typename OutputIt, typename Context, typename Id>
+void format_arg(
+    basic_format_parse_context<typename Context::char_type>& parse_ctx,
+    Context& ctx, Id arg_id) {
+  ctx.advance_to(visit_format_arg(
+      arg_formatter<OutputIt, typename Context::char_type>(ctx, &parse_ctx),
+      ctx.arg(arg_id)));
+}
+
+// vformat_to is defined in a subnamespace to prevent ADL.
+namespace cf {
+template <typename Context, typename OutputIt, typename CompiledFormat>
+auto vformat_to(OutputIt out, CompiledFormat& cf,
+                basic_format_args<Context> args) -> typename Context::iterator {
+  using char_type = typename Context::char_type;
+  basic_format_parse_context<char_type> parse_ctx(
+      to_string_view(cf.format_str_));
+  Context ctx(out, args);
+
+  const auto& parts = cf.parts();
+  for (auto part_it = std::begin(parts); part_it != std::end(parts);
+       ++part_it) {
+    const auto& part = *part_it;
+    const auto& value = part.val;
+
+    using format_part_t = format_part<char_type>;
+    switch (part.part_kind) {
+    case format_part_t::kind::text: {
+      const auto text = value.str;
+      auto output = ctx.out();
+      auto&& it = reserve(output, text.size());
+      it = std::copy_n(text.begin(), text.size(), it);
+      ctx.advance_to(output);
+      break;
+    }
+
+    case format_part_t::kind::arg_index:
+      advance_to(parse_ctx, part.arg_id_end);
+      detail::format_arg<OutputIt>(parse_ctx, ctx, value.arg_index);
+      break;
+
+    case format_part_t::kind::arg_name:
+      advance_to(parse_ctx, part.arg_id_end);
+      detail::format_arg<OutputIt>(parse_ctx, ctx, value.str);
+      break;
+
+    case format_part_t::kind::replacement: {
+      const auto& arg_id_value = value.repl.arg_id.val;
+      const auto arg = value.repl.arg_id.kind == arg_id_kind::index
+                           ? ctx.arg(arg_id_value.index)
+                           : ctx.arg(arg_id_value.name);
+
+      auto specs = value.repl.specs;
+
+      handle_dynamic_spec<width_checker>(specs.width, specs.width_ref, ctx);
+      handle_dynamic_spec<precision_checker>(specs.precision,
+                                             specs.precision_ref, ctx);
+
+      error_handler h;
+      numeric_specs_checker<error_handler> checker(h, arg.type());
+      if (specs.align == align::numeric) checker.require_numeric_argument();
+      if (specs.sign != sign::none) checker.check_sign();
+      if (specs.alt) checker.require_numeric_argument();
+      if (specs.precision >= 0) checker.check_precision();
+
+      advance_to(parse_ctx, part.arg_id_end);
+      ctx.advance_to(
+          visit_format_arg(arg_formatter<OutputIt, typename Context::char_type>(
+                               ctx, nullptr, &specs),
+                           arg));
+      break;
+    }
+    }
+  }
+  return ctx.out();
+}
+}  // namespace cf
+
+struct basic_compiled_format {};
+
+template <typename S, typename = void>
+struct compiled_format_base : basic_compiled_format {
+  using char_type = char_t<S>;
+  using parts_container = std::vector<detail::format_part<char_type>>;
+
+  parts_container compiled_parts;
+
+  explicit compiled_format_base(basic_string_view<char_type> format_str) {
+    compile_format_string<false>(format_str,
+                                 [this](const format_part<char_type>& part) {
+                                   compiled_parts.push_back(part);
+                                 });
+  }
+
+  const parts_container& parts() const { return compiled_parts; }
+};
+
+template <typename Char, unsigned N> struct format_part_array {
+  format_part<Char> data[N] = {};
+  FMT_CONSTEXPR format_part_array() = default;
+};
+
+template <typename Char, unsigned N>
+FMT_CONSTEXPR format_part_array<Char, N> compile_to_parts(
+    basic_string_view<Char> format_str) {
+  format_part_array<Char, N> parts;
+  unsigned counter = 0;
+  // This is not a lambda for compatibility with older compilers.
+  struct {
+    format_part<Char>* parts;
+    unsigned* counter;
+    FMT_CONSTEXPR void operator()(const format_part<Char>& part) {
+      parts[(*counter)++] = part;
+    }
+  } collector{parts.data, &counter};
+  compile_format_string<true>(format_str, collector);
+  if (counter < N) {
+    parts.data[counter] =
+        format_part<Char>::make_text(basic_string_view<Char>());
+  }
+  return parts;
+}
+
+template <typename T> constexpr const T& constexpr_max(const T& a, const T& b) {
+  return (a < b) ? b : a;
+}
+
+template <typename S>
+struct compiled_format_base<S, enable_if_t<is_compile_string<S>::value>>
+    : basic_compiled_format {
+  using char_type = char_t<S>;
+
+  FMT_CONSTEXPR explicit compiled_format_base(basic_string_view<char_type>) {}
+
+// Workaround for old compilers. Format string compilation will not be
+// performed there anyway.
+#if FMT_USE_CONSTEXPR
+  static FMT_CONSTEXPR_DECL const unsigned num_format_parts =
+      constexpr_max(count_parts(to_string_view(S())), 1u);
+#else
+  static const unsigned num_format_parts = 1;
+#endif
+
+  using parts_container = format_part<char_type>[num_format_parts];
+
+  const parts_container& parts() const {
+    static FMT_CONSTEXPR_DECL const auto compiled_parts =
+        compile_to_parts<char_type, num_format_parts>(
+            detail::to_string_view(S()));
+    return compiled_parts.data;
+  }
+};
+
+template <typename S, typename... Args>
+class compiled_format : private compiled_format_base<S> {
+ public:
+  using typename compiled_format_base<S>::char_type;
+
+ private:
+  basic_string_view<char_type> format_str_;
+
+  template <typename Context, typename OutputIt, typename CompiledFormat>
+  friend auto cf::vformat_to(OutputIt out, CompiledFormat& cf,
+                             basic_format_args<Context> args) ->
+      typename Context::iterator;
+
+ public:
+  compiled_format() = delete;
+  explicit constexpr compiled_format(basic_string_view<char_type> format_str)
+      : compiled_format_base<S>(format_str), format_str_(format_str) {}
+};
+
+#ifdef __cpp_if_constexpr
+template <typename... Args> struct type_list {};
+
+// Returns a reference to the argument at index N from [first, rest...].
+template <int N, typename T, typename... Args>
+constexpr const auto& get([[maybe_unused]] const T& first,
+                          [[maybe_unused]] const Args&... rest) {
+  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
+  if constexpr (N == 0)
+    return first;
+  else
+    return get<N - 1>(rest...);
+}
+
+template <int N, typename> struct get_type_impl;
+
+template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
+  using type = remove_cvref_t<decltype(get<N>(std::declval<Args>()...))>;
+};
+
+template <int N, typename T>
+using get_type = typename get_type_impl<N, T>::type;
+
+template <typename T> struct is_compiled_format : std::false_type {};
+
+template <typename Char> struct text {
+  basic_string_view<Char> data;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, data);
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<text<Char>> : std::true_type {};
+
+template <typename Char>
+constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
+                               size_t size) {
+  return {{&s[pos], size}};
+}
+
+template <typename Char> struct code_unit {
+  Char value;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, value);
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<code_unit<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N.
+template <typename Char, typename T, int N> struct field {
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  OutputIt format(OutputIt out, const Args&... args) const {
+    // This ensures that the argument type is convertile to `const T&`.
+    const T& arg = get<N>(args...);
+    return write<Char>(out, arg);
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<field<Char, T, N>> : std::true_type {};
+
+// A replacement field that refers to argument N and has format specifiers.
+template <typename Char, typename T, int N> struct spec_field {
+  using char_type = Char;
+  mutable formatter<T, Char> fmt;
+
+  template <typename OutputIt, typename... Args>
+  OutputIt format(OutputIt out, const Args&... args) const {
+    // This ensures that the argument type is convertile to `const T&`.
+    const T& arg = get<N>(args...);
+    const auto& vargs =
+        make_format_args<basic_format_context<OutputIt, Char>>(args...);
+    basic_format_context<OutputIt, Char> ctx(out, vargs);
+    return fmt.format(arg, ctx);
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
+
+template <typename L, typename R> struct concat {
+  L lhs;
+  R rhs;
+  using char_type = typename L::char_type;
+
+  template <typename OutputIt, typename... Args>
+  OutputIt format(OutputIt out, const Args&... args) const {
+    out = lhs.format(out, args...);
+    return rhs.format(out, args...);
+  }
+};
+
+template <typename L, typename R>
+struct is_compiled_format<concat<L, R>> : std::true_type {};
+
+template <typename L, typename R>
+constexpr concat<L, R> make_concat(L lhs, R rhs) {
+  return {lhs, rhs};
+}
+
+struct unknown_format {};
+
+template <typename Char>
+constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
+  for (size_t size = str.size(); pos != size; ++pos) {
+    if (str[pos] == '{' || str[pos] == '}') break;
+  }
+  return pos;
+}
+
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str);
+
+template <typename Args, size_t POS, int ID, typename T, typename S>
+constexpr auto parse_tail(T head, S format_str) {
+  if constexpr (POS !=
+                basic_string_view<typename S::char_type>(format_str).size()) {
+    constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
+    if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
+                               unknown_format>())
+      return tail;
+    else
+      return make_concat(head, tail);
+  } else {
+    return head;
+  }
+}
+
+template <typename T, typename Char> struct parse_specs_result {
+  formatter<T, Char> fmt;
+  size_t end;
+  int next_arg_id;
+};
+
+template <typename T, typename Char>
+constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
+                                                  size_t pos, int arg_id) {
+  str.remove_prefix(pos);
+  auto ctx = basic_format_parse_context<Char>(str, {}, arg_id + 1);
+  auto f = formatter<T, Char>();
+  auto end = f.parse(ctx);
+  return {f, pos + (end - str.data()) + 1, ctx.next_arg_id()};
+}
+
+// Compiles a non-empty format string and returns the compiled representation
+// or unknown_format() on unrecognized input.
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str) {
+  using char_type = typename S::char_type;
+  constexpr basic_string_view<char_type> str = format_str;
+  if constexpr (str[POS] == '{') {
+    if (POS + 1 == str.size())
+      throw format_error("unmatched '{' in format string");
+    if constexpr (str[POS + 1] == '{') {
+      return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+    } else if constexpr (str[POS + 1] == '}') {
+      using type = get_type<ID, Args>;
+      return parse_tail<Args, POS + 2, ID + 1>(field<char_type, type, ID>(),
+                                               format_str);
+    } else if constexpr (str[POS + 1] == ':') {
+      using type = get_type<ID, Args>;
+      constexpr auto result = parse_specs<type>(str, POS + 2, ID);
+      return parse_tail<Args, result.end, result.next_arg_id>(
+          spec_field<char_type, type, ID>{result.fmt}, format_str);
+    } else {
+      return unknown_format();
+    }
+  } else if constexpr (str[POS] == '}') {
+    if (POS + 1 == str.size())
+      throw format_error("unmatched '}' in format string");
+    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+  } else {
+    constexpr auto end = parse_text(str, POS + 1);
+    if constexpr (end - POS > 1) {
+      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
+                                       format_str);
+    } else {
+      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
+                                       format_str);
+    }
+  }
+}
+
+template <typename... Args, typename S,
+          FMT_ENABLE_IF(is_compile_string<S>::value ||
+                        detail::is_compiled_string<S>::value)>
+constexpr auto compile(S format_str) {
+  constexpr basic_string_view<typename S::char_type> str = format_str;
+  if constexpr (str.size() == 0) {
+    return detail::make_text(str, 0, 0);
+  } else {
+    constexpr auto result =
+        detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
+            format_str);
+    if constexpr (std::is_same<remove_cvref_t<decltype(result)>,
+                               detail::unknown_format>()) {
+      return detail::compiled_format<S, Args...>(to_string_view(format_str));
+    } else {
+      return result;
+    }
+  }
+}
+#else
+template <typename... Args, typename S,
+          FMT_ENABLE_IF(is_compile_string<S>::value)>
+constexpr auto compile(S format_str) -> detail::compiled_format<S, Args...> {
+  return detail::compiled_format<S, Args...>(to_string_view(format_str));
+}
+#endif  // __cpp_if_constexpr
+
+// Compiles the format string which must be a string literal.
+template <typename... Args, typename Char, size_t N>
+auto compile(const Char (&format_str)[N])
+    -> detail::compiled_format<const Char*, Args...> {
+  return detail::compiled_format<const Char*, Args...>(
+      basic_string_view<Char>(format_str, N - 1));
+}
+}  // namespace detail
+
+// DEPRECATED! use FMT_COMPILE instead.
+template <typename... Args>
+FMT_DEPRECATED auto compile(const Args&... args)
+    -> decltype(detail::compile(args...)) {
+  return detail::compile(args...);
+}
+
+#if FMT_USE_CONSTEXPR
+#  ifdef __cpp_if_constexpr
+
+template <typename CompiledFormat, typename... Args,
+          typename Char = typename CompiledFormat::char_type,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
+                                          const Args&... args) {
+  basic_memory_buffer<Char> buffer;
+  cf.format(detail::buffer_appender<Char>(buffer), args...);
+  return to_string(buffer);
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+                   const Args&... args) {
+  return cf.format(out, args...);
+}
+#  endif  // __cpp_if_constexpr
+#endif    // FMT_USE_CONSTEXPR
+
+template <typename CompiledFormat, typename... Args,
+          typename Char = typename CompiledFormat::char_type,
+          FMT_ENABLE_IF(std::is_base_of<detail::basic_compiled_format,
+                                        CompiledFormat>::value)>
+std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
+  basic_memory_buffer<Char> buffer;
+  using context = buffer_context<Char>;
+  detail::cf::vformat_to<context>(detail::buffer_appender<Char>(buffer), cf,
+                                  make_format_args<context>(args...));
+  return to_string(buffer);
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
+                                                           Args&&... args) {
+#ifdef __cpp_if_constexpr
+  if constexpr (std::is_same<typename S::char_type, char>::value) {
+    constexpr basic_string_view<typename S::char_type> str = S();
+    if (str.size() == 2 && str[0] == '{' && str[1] == '}')
+      return fmt::to_string(detail::first(args...));
+  }
+#endif
+  constexpr auto compiled = detail::compile<Args...>(S());
+  return format(compiled, std::forward<Args>(args)...);
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args,
+          FMT_ENABLE_IF(std::is_base_of<detail::basic_compiled_format,
+                                        CompiledFormat>::value)>
+OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+                   const Args&... args) {
+  using char_type = typename CompiledFormat::char_type;
+  using context = format_context_t<OutputIt, char_type>;
+  return detail::cf::vformat_to<context>(out, cf,
+                                         make_format_args<context>(args...));
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+OutputIt format_to(OutputIt out, const S&, const Args&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  return format_to(out, compiled, args...);
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args>
+auto format_to_n(OutputIt out, size_t n, const CompiledFormat& cf,
+                 const Args&... args) ->
+    typename std::enable_if<
+        detail::is_output_iterator<OutputIt,
+                                   typename CompiledFormat::char_type>::value &&
+            std::is_base_of<detail::basic_compiled_format,
+                            CompiledFormat>::value,
+        format_to_n_result<OutputIt>>::type {
+  auto it =
+      format_to(detail::truncating_iterator<OutputIt>(out, n), cf, args...);
+  return {it.base(), it.count()};
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n, const S&,
+                                         const Args&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), compiled,
+                      args...);
+  return {it.base(), it.count()};
+}
+
+template <typename CompiledFormat, typename... Args>
+size_t formatted_size(const CompiledFormat& cf, const Args&... args) {
+  return format_to(detail::counting_iterator(), cf, args...).count();
+}
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_COMPILE_H_