Index: LICENSE.txt =================================================================== --- LICENSE.txt +++ LICENSE.txt @@ -60,9 +60,6 @@ /source/scriptinterface/third_party MPL 2.0 - /source/third_party/fmt - BSD - /source/third_party/encryption GPL version 2 (or later) ISC (pkcs5_pbkdf2.cpp) Index: build/premake/extern_libs5.lua =================================================================== --- build/premake/extern_libs5.lua +++ build/premake/extern_libs5.lua @@ -258,6 +258,26 @@ end end, }, + fmt = { + compile_settings = function() + if os.istarget("windows") or os.istarget("macosx") or _OPTIONS["with-bundled-fmt"] then + add_source_include_paths("fmt") + else + --- Linux, BSD + pkgconfig.add_includes("fmt") + end + end, + link_settings = function() + if os.istarget("windows") or os.istarget("macosx") or _OPTIONS["with-bundled-fmt"] then + add_source_lib_paths("fmt") + add_default_links({ + unix_names = { "fmt" }, + }) + else + pkgconfig.add_links("fmt") + end + end + }, gloox = { compile_settings = function() if os.istarget("windows") then Index: build/premake/premake5.lua =================================================================== --- build/premake/premake5.lua +++ build/premake/premake5.lua @@ -6,6 +6,7 @@ newoption { trigger = "jenkins-tests", description = "Configure CxxTest to use the XmlPrinter runner which produces Jenkins-compatible output" } newoption { trigger = "minimal-flags", description = "Only set compiler/linker flags that are really needed. Has no effect on Windows builds" } newoption { trigger = "outpath", description = "Location for generated project files" } +newoption { trigger = "with-bundled-fmt", description = "Use bundled fmt instead of the one available on the system" } newoption { trigger = "with-system-mozjs45", description = "Search standard paths for libmozjs45, instead of using bundled copy" } newoption { trigger = "with-system-nvtt", description = "Search standard paths for nvidia-texture-tools library, instead of using bundled copy" } newoption { trigger = "without-audio", description = "Disable use of OpenAL/Ogg/Vorbis APIs" } @@ -578,6 +579,7 @@ "spidermonkey", "enet", "boost", -- dragged in via server->simulation.h->random + "fmt", } if not _OPTIONS["without-miniupnpc"] then table.insert(extern_libs, "miniupnpc") @@ -590,6 +592,7 @@ extern_libs = { "iconv", "boost", + "fmt", } setup_third_party_static_lib_project("tinygettext", source_dirs, extern_libs, { } ) @@ -623,7 +626,8 @@ "icu", "iconv", "libsodium", - "tinygettext" + "tinygettext", + "fmt", } setup_static_lib_project("lobby", source_dirs, extern_libs, {}) @@ -637,6 +641,7 @@ extern_libs = { "boost", "gloox", + "fmt", } if _OPTIONS["build-shared-glooxwrapper"] then setup_shared_lib_project("glooxwrapper", source_dirs, extern_libs, {}) @@ -652,7 +657,8 @@ extern_libs = { "spidermonkey", "boost", - "libsodium" + "libsodium", + "fmt", } setup_static_lib_project("lobby", source_dirs, extern_libs, {}) files { source_root.."lobby/Globals.cpp" } @@ -672,6 +678,7 @@ "boost", "opengl", "spidermonkey", + "fmt", } setup_static_lib_project("simulation2", source_dirs, extern_libs, {}) @@ -685,6 +692,7 @@ "spidermonkey", "valgrind", "sdl", + "fmt", } setup_static_lib_project("scriptinterface", source_dirs, extern_libs, {}) @@ -703,7 +711,6 @@ "maths/scripting", "i18n", "i18n/scripting", - "third_party/fmt", } extern_libs = { "spidermonkey", @@ -718,6 +725,7 @@ "icu", "iconv", "libsodium", + "fmt", } if not _OPTIONS["without-audio"] then @@ -740,7 +748,8 @@ "opengl", "sdl", -- key definitions "spidermonkey", -- for graphics/scripting - "boost" + "boost", + "fmt", } if not _OPTIONS["without-nvtt"] then table.insert(extern_libs, "nvtt") @@ -756,7 +765,8 @@ "boost", "sdl", -- key definitions "opengl", - "spidermonkey" + "spidermonkey", + "fmt", } setup_static_lib_project("atlas", source_dirs, extern_libs, {}) @@ -778,6 +788,7 @@ "tinygettext", "icu", "iconv", + "fmt", } if not _OPTIONS["without-audio"] then table.insert(extern_libs, "openal") @@ -811,6 +822,7 @@ "zlib", "valgrind", "cxxtest", + "fmt", } -- CPU architecture-specific @@ -915,6 +927,7 @@ "icu", "iconv", "libsodium", + "fmt", "valgrind", } Index: build/workspaces/update-workspaces.sh =================================================================== --- build/workspaces/update-workspaces.sh +++ build/workspaces/update-workspaces.sh @@ -39,6 +39,7 @@ premake_args="" without_nvtt=false +with_bundled_fmt=false with_system_nvtt=false with_system_mozjs45=false enable_atlas=true @@ -47,6 +48,7 @@ do case $i in --without-nvtt ) without_nvtt=true; premake_args="${premake_args} --without-nvtt" ;; + --with-bundled-fmt ) with_bundled_fmt=true; premake_args="${premake_args} --with-bundled-fmt" ;; --with-system-nvtt ) with_system_nvtt=true; premake_args="${premake_args} --with-system-nvtt" ;; --with-system-mozjs45 ) with_system_mozjs45=true; premake_args="${premake_args} --with-system-mozjs45" ;; --enable-atlas ) enable_atlas=true ;; @@ -85,6 +87,10 @@ # Build/update bundled external libraries (cd ../../libraries/source/fcollada/src && ${MAKE} ${JOBS}) || die "FCollada build failed" echo + if [ "$with_bundled_fmt" = "true" ]; then + (cd ../../libraries/source/fmt && MAKE=${MAKE} JOBS=${JOBS} ./build.sh) || die "fmt build failed" + fi + echo if [ "$with_system_mozjs45" = "false" ]; then (cd ../../libraries/source/spidermonkey && MAKE=${MAKE} JOBS=${JOBS} ./build.sh) || die "SpiderMonkey build failed" fi Index: libraries/LICENSE.txt =================================================================== --- libraries/LICENSE.txt +++ libraries/LICENSE.txt @@ -17,6 +17,9 @@ source/fcollada MIT (see src/FCollada/Copyright.txt) + source/fmt + MIT + source/nvtt MIT - see src/NVIDIA_Texture_Tools_LICENSE.txt Index: libraries/osx/build-osx-libs.sh =================================================================== --- libraries/osx/build-osx-libs.sh +++ libraries/osx/build-osx-libs.sh @@ -50,6 +50,7 @@ # * SpiderMonkey 45 # * NVTT # * FCollada +# * fmt # -------------------------------------------------------------- # Provided by OS X: # * OpenAL @@ -1052,3 +1053,32 @@ already_built fi popd > /dev/null + +# -------------------------------------------------------------- +# fmt - no install +echo -e "Building fmt..." + +pushd ../source/fmt > /dev/null + +if [[ "$force_rebuild" = "true" ]] || [[ ! -e .already-built ]] +then + rm -f .already-built + rm -f lib/*.a + rm -rf build + mkdir -p build + + pushd build + + (cmake .. \ + -DFMT_TEST=False \ + -DFMT_DOC=False \ + && make clean && make fmt ${JOBS}) || die "fmt build failed" + popd + + mkdir -p lib + cp build/libfmt.a lib/ + touch .already-built +else + already_built +fi +popd > /dev/null Index: libraries/source/fmt/CMakeLists.txt =================================================================== --- /dev/null +++ libraries/source/fmt/CMakeLists.txt @@ -0,0 +1,332 @@ +cmake_minimum_required(VERSION 3.1.0) + +# Use newer policies if available, up to most recent tested version of CMake. +if(${CMAKE_VERSION} VERSION_LESS 3.11) + cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}) +else() + cmake_policy(VERSION 3.11) +endif() + +# Determine if fmt is built as a subproject (using add_subdirectory) +# or if it is the master project. +set(MASTER_PROJECT OFF) +if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR) + set(MASTER_PROJECT ON) + message(STATUS "CMake version: ${CMAKE_VERSION}") +endif () + +# Joins arguments and places the results in ${result_var}. +function(join result_var) + set(result ) + foreach (arg ${ARGN}) + set(result "${result}${arg}") + endforeach () + set(${result_var} "${result}" PARENT_SCOPE) +endfunction() + +# Sets a cache variable with a docstring joined from multiple arguments: +# set( ... CACHE ...) +# This allows splitting a long docstring for readability. +function(set_verbose) + cmake_parse_arguments(SET_VERBOSE "" "" "CACHE" ${ARGN}) + list(GET SET_VERBOSE_CACHE 0 type) + list(REMOVE_AT SET_VERBOSE_CACHE 0) + join(doc ${SET_VERBOSE_CACHE}) + set(${SET_VERBOSE_UNPARSED_ARGUMENTS} CACHE ${type} ${doc}) +endfunction() + +# Set the default CMAKE_BUILD_TYPE to Release. +# This should be done before the project command since the latter can set +# CMAKE_BUILD_TYPE itself (it does so for nmake). +if (MASTER_PROJECT AND NOT CMAKE_BUILD_TYPE) + set_verbose(CMAKE_BUILD_TYPE Release CACHE STRING + "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or " + "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.") +endif () + +option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF) +option(FMT_WERROR "Halt the compilation with an error on compiler warnings." + OFF) + +# Options that control generation of various targets. +option(FMT_DOC "Generate the doc target." ${MASTER_PROJECT}) +option(FMT_INSTALL "Generate the install target." ${MASTER_PROJECT}) +option(FMT_TEST "Generate the test target." ${MASTER_PROJECT}) +option(FMT_FUZZ "Generate the fuzz target." OFF) +option(FMT_CUDA_TEST "Generate the cuda-test target." OFF) + +project(FMT CXX) + +# Get version from core.h +file(READ include/fmt/core.h core_h) +if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])") + message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.") +endif () +# Use math to skip leading zeros if any. +math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1}) +math(EXPR CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2}) +math(EXPR CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3}) +join(FMT_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}. + ${CPACK_PACKAGE_VERSION_PATCH}) +message(STATUS "Version: ${FMT_VERSION}") + +message(STATUS "Build type: ${CMAKE_BUILD_TYPE}") + +if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY) + set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) +endif () + +set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} + "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake") + +include(cxx14) +include(CheckCXXCompilerFlag) + +list(FIND CMAKE_CXX_COMPILE_FEATURES "cxx_variadic_templates" index) +if (${index} GREATER -1) + # Use cxx_variadic_templates instead of more appropriate cxx_std_11 for + # compatibility with older CMake versions. + set(FMT_REQUIRED_FEATURES cxx_variadic_templates) +endif () +message(STATUS "Required features: ${FMT_REQUIRED_FEATURES}") + +if (CMAKE_CXX_COMPILER_ID MATCHES "GNU") + set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic + -Wold-style-cast -Wundef + -Wredundant-decls -Wwrite-strings -Wpointer-arith + -Wcast-qual -Wformat=2 -Wmissing-include-dirs + -Wcast-align -Wnon-virtual-dtor + -Wctor-dtor-privacy -Wdisabled-optimization + -Winvalid-pch -Woverloaded-virtual + -Wconversion -Wswitch-enum + -Wno-ctor-dtor-privacy -Wno-format-nonliteral -Wno-shadow) + if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wnoexcept + -Wno-dangling-else -Wno-unused-local-typedefs) + endif () + if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion + -Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast + -Wvector-operation-performance -Wsized-deallocation) + endif () + if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2 + -Wnull-dereference -Wduplicated-cond) + endif () + set(WERROR_FLAG -Werror) +endif () + +if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") + set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic -Wconversion + -Wno-sign-conversion -Wdeprecated -Wweak-vtables) + check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING) + if (HAS_NULLPTR_WARNING) + set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} + -Wzero-as-null-pointer-constant) + endif () + set(WERROR_FLAG -Werror) +endif () + +if (MSVC) + set(PEDANTIC_COMPILE_FLAGS /W3) + set(WERROR_FLAG /WX) +endif () + +if (MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio") + # If Microsoft SDK is installed create script run-msbuild.bat that + # calls SetEnv.cmd to set up build environment and runs msbuild. + # It is useful when building Visual Studio projects with the SDK + # toolchain rather than Visual Studio. + include(FindSetEnv) + if (WINSDK_SETENV) + set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"") + endif () + # Set FrameworkPathOverride to get rid of MSB3644 warnings. + join(netfxpath + "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\" + ".NETFramework\\v4.0") + file(WRITE run-msbuild.bat " + ${MSBUILD_SETUP} + ${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*") +endif () + +set(strtod_l_headers stdlib.h) +if (APPLE) + set(strtod_l_headers ${strtod_l_headers} xlocale.h) +endif () + +include(CheckSymbolExists) +if (WIN32) + check_symbol_exists(_strtod_l "${strtod_l_headers}" HAVE_STRTOD_L) +else () + check_symbol_exists(strtod_l "${strtod_l_headers}" HAVE_STRTOD_L) +endif () + +function(add_headers VAR) + set(headers ${${VAR}}) + foreach (header ${ARGN}) + set(headers ${headers} include/fmt/${header}) + endforeach() + set(${VAR} ${headers} PARENT_SCOPE) +endfunction() + +# Define the fmt library, its includes and the needed defines. +add_headers(FMT_HEADERS chrono.h color.h compile.h core.h format.h format-inl.h + locale.h os.h ostream.h posix.h printf.h ranges.h) +set(FMT_SOURCES src/format.cc src/os.cc) + +add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst) +add_library(fmt::fmt ALIAS fmt) + +if (HAVE_STRTOD_L) + target_compile_definitions(fmt PUBLIC FMT_LOCALE) +endif () + +if (FMT_WERROR) + target_compile_options(fmt PRIVATE ${WERROR_FLAG}) +endif () +if (FMT_PEDANTIC) + target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS}) +endif () + +target_compile_features(fmt INTERFACE ${FMT_REQUIRED_FEATURES}) + +target_include_directories(fmt PUBLIC + $ + $) + +set(FMT_DEBUG_POSTFIX d CACHE STRING "Debug library postfix.") + +set_target_properties(fmt PROPERTIES + VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR} + DEBUG_POSTFIX "${FMT_DEBUG_POSTFIX}") + +# Set FMT_LIB_NAME for pkg-config fmt.pc. We cannot use the OUTPUT_NAME target +# property because it's not set by default. +set(FMT_LIB_NAME fmt) +if (CMAKE_BUILD_TYPE STREQUAL "Debug") + set(FMT_LIB_NAME ${FMT_LIB_NAME}${FMT_DEBUG_POSTFIX}) +endif () + +if (BUILD_SHARED_LIBS) + if (UNIX AND NOT APPLE AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "SunOS") + # Fix rpmlint warning: + # unused-direct-shlib-dependency /usr/lib/libformat.so.1.1.0 /lib/libm.so.6. + target_link_libraries(fmt -Wl,--as-needed) + endif () + target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED) +endif () +if (FMT_SAFE_DURATION_CAST) + target_compile_definitions(fmt PUBLIC FMT_SAFE_DURATION_CAST) +endif() + +add_library(fmt-header-only INTERFACE) +add_library(fmt::fmt-header-only ALIAS fmt-header-only) + +target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1) +target_compile_features(fmt-header-only INTERFACE ${FMT_REQUIRED_FEATURES}) + +target_include_directories(fmt-header-only INTERFACE + $ + $) + +# Install targets. +if (FMT_INSTALL) + include(GNUInstallDirs) + include(CMakePackageConfigHelpers) + set_verbose(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING + "Installation directory for cmake files, relative to " + "${CMAKE_INSTALL_PREFIX}.") + set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake) + set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake) + set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc) + set(targets_export_name fmt-targets) + + set (INSTALL_TARGETS fmt) + if (TARGET fmt-header-only) + set(INSTALL_TARGETS ${INSTALL_TARGETS} fmt-header-only) + endif () + + set_verbose(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING + "Installation directory for libraries, relative to " + "${CMAKE_INSTALL_PREFIX}.") + + set_verbose(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR}/fmt CACHE STRING + "Installation directory for include files, relative to " + "${CMAKE_INSTALL_PREFIX}.") + + set_verbose(FMT_PKGCONFIG_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig CACHE PATH + "Installation directory for pkgconfig (.pc) files, relative to " + "${CMAKE_INSTALL_PREFIX}.") + + # Generate the version, config and target files into the build directory. + write_basic_package_version_file( + ${version_config} + VERSION ${FMT_VERSION} + COMPATIBILITY AnyNewerVersion) + configure_file( + "${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in" + "${pkgconfig}" + @ONLY) + configure_package_config_file( + ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in + ${project_config} + INSTALL_DESTINATION ${FMT_CMAKE_DIR}) + # Use a namespace because CMake provides better diagnostics for namespaced + # imported targets. + export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt:: + FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake) + + # Install version, config and target files. + install( + FILES ${project_config} ${version_config} + DESTINATION ${FMT_CMAKE_DIR}) + install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR} + NAMESPACE fmt::) + + # Install the library and headers. + install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name} + LIBRARY DESTINATION ${FMT_LIB_DIR} + ARCHIVE DESTINATION ${FMT_LIB_DIR} + RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}) + + install(FILES $ + DESTINATION ${FMT_LIB_DIR} OPTIONAL) + install(FILES ${FMT_HEADERS} DESTINATION ${FMT_INC_DIR}) + install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}") +endif () + +if (FMT_DOC) + add_subdirectory(doc) +endif () + +if (FMT_TEST) + enable_testing() + add_subdirectory(test) +endif () + +# Control fuzzing independent of the unit tests. +if (FMT_FUZZ) + add_subdirectory(test/fuzzing) +endif () + +set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore) +if (MASTER_PROJECT AND EXISTS ${gitignore}) + # Get the list of ignored files from .gitignore. + file (STRINGS ${gitignore} lines) + list(REMOVE_ITEM lines /doc/html) + foreach (line ${lines}) + string(REPLACE "." "[.]" line "${line}") + string(REPLACE "*" ".*" line "${line}") + set(ignored_files ${ignored_files} "${line}$" "${line}/") + endforeach () + set(ignored_files ${ignored_files} + /.git /breathe /format-benchmark sphinx/ .buildinfo .doctrees) + + set(CPACK_SOURCE_GENERATOR ZIP) + set(CPACK_SOURCE_IGNORE_FILES ${ignored_files}) + set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION}) + set(CPACK_PACKAGE_NAME fmt) + set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.rst) + include(CPack) +endif () Index: libraries/source/fmt/ChangeLog.rst =================================================================== --- /dev/null +++ libraries/source/fmt/ChangeLog.rst @@ -0,0 +1,2681 @@ +6.1.2 - 2019-12-11 +------------------ + +* Fixed ABI compatibility with ``libfmt.so.6.0.0`` + (`#1471 `_). + +* Fixed handling types convertible to ``std::string_view`` + (`#1451 `_). + Thanks `@denizevrenci (Deniz Evrenci) `_. + +* Made CUDA test an opt-in enabled via the ``FMT_CUDA_TEST`` CMake option. + +* Fixed sign conversion warnings + (`#1440 `_). + Thanks `@0x8000-0000 (Florin Iucha) `_. + +6.1.1 - 2019-12-04 +------------------ + +* Fixed shared library build on Windows + (`#1443 `_, + `#1445 `_, + `#1446 `_, + `#1450 `_). + Thanks `@egorpugin (Egor Pugin) `_, + `@bbolli (Beat Bolli) `_. + +* Added a missing decimal point in exponent notation with trailing zeros. + +* Removed deprecated ``format_arg_store::TYPES``. + +6.1.0 - 2019-12-01 +------------------ + +* {fmt} now formats IEEE 754 ``float`` and ``double`` using the shortest decimal + representation with correct rounding by default: + + .. code:: c++ + + #include + #include + + int main() { + fmt::print("{}", M_PI); + } + + prints ``3.141592653589793``. + +* Made the fast binary to decimal floating-point formatter the default, + simplified it and improved performance. {fmt} is now 15 times faster than + libc++'s ``std::ostringstream``, 11 times faster than ``printf`` and 10% + faster than double-conversion on `dtoa-benchmark + `_: + + ================== ========= ======= + Function Time (ns) Speedup + ================== ========= ======= + ostringstream 1,346.30 1.00x + ostrstream 1,195.74 1.13x + sprintf 995.08 1.35x + doubleconv 99.10 13.59x + fmt 88.34 15.24x + ================== ========= ======= + + .. image:: https://user-images.githubusercontent.com/576385/ + 69767160-cdaca400-112f-11ea-9fc5-347c9f83caad.png + +* {fmt} no longer converts ``float`` arguments to ``double``. In particular this + improves the default (shortest) representation of floats and makes + ``fmt::format`` consistent with ``std::format`` specs + (`#1336 `_, + `#1353 `_, + `#1360 `_, + `#1361 `_): + + .. code:: c++ + + fmt::print("{}", 0.1f); + + prints ``0.1`` instead of ``0.10000000149011612``. + + Thanks `@orivej (Orivej Desh) `_. + +* Made floating-point formatting output consistent with ``printf``/iostreams + (`#1376 `_, + `#1417 `_). + +* Added support for 128-bit integers + (`#1287 `_): + + .. code:: c++ + + fmt::print("{}", std::numeric_limits<__int128_t>::max()); + + prints ``170141183460469231731687303715884105727``. + + Thanks `@denizevrenci (Deniz Evrenci) `_. + +* The overload of ``print`` that takes ``text_style`` is now atomic, i.e. the + output from different threads doesn't interleave + (`#1351 `_). + Thanks `@tankiJong (Tanki Zhang) `_. + +* Made compile time in the header-only mode ~20% faster by reducing the number + of template instantiations. ``wchar_t`` overload of ``vprint`` was moved from + ``fmt/core.h`` to ``fmt/format.h``. + +* Added an overload of ``fmt::join`` that works with tuples + (`#1322 `_, + `#1330 `_): + + .. code:: c++ + + #include + #include + + int main() { + std::tuple t{'a', 1, 2.0f}; + fmt::print("{}", t); + } + + prints ``('a', 1, 2.0)``. + + Thanks `@jeremyong (Jeremy Ong) `_. + +* Changed formatting of octal zero with prefix from "00" to "0": + + .. code:: c++ + + fmt::print("{:#o}", 0); + + prints ``0``. + +* The locale is now passed to ostream insertion (``<<``) operators + (`#1406 `_): + + .. code:: c++ + + #include + #include + + struct S { + double value; + }; + + std::ostream& operator<<(std::ostream& os, S s) { + return os << s.value; + } + + int main() { + auto s = fmt::format(std::locale("fr_FR.UTF-8"), "{}", S{0.42}); + // s == "0,42" + } + + Thanks `@dlaugt (Daniel Laügt) `_. + +* Locale-specific number formatting now uses grouping + (`#1393 `_ + `#1394 `_). + Thanks `@skrdaniel `_. + +* Fixed handling of types with deleted implicit rvalue conversion to + ``const char**`` (`#1421 `_): + + .. code:: c++ + + struct mystring { + operator const char*() const&; + operator const char*() &; + operator const char*() const&& = delete; + operator const char*() && = delete; + }; + mystring str; + fmt::print("{}", str); // now compiles + +* Enums are now mapped to correct underlying types instead of ``int`` + (`#1286 `_). + Thanks `@agmt (Egor Seredin) `_. + +* Enum classes are no longer implicitly converted to ``int`` + (`#1424 `_). + +* Added ``basic_format_parse_context`` for consistency with C++20 + ``std::format`` and deprecated ``basic_parse_context``. + +* Fixed handling of UTF-8 in precision + (`#1389 `_, + `#1390 `_). + Thanks `@tajtiattila (Attila Tajti) `_. + +* {fmt} can now be installed on Linux, macOS and Windows with + `Conda `__ using its + `conda-forge `__ + `package `__ + (`#1410 `_):: + + conda install -c conda-forge fmt + + Thanks `@tdegeus (Tom de Geus) `_. + +* Added a CUDA test (`#1285 `_, + `#1317 `_). + Thanks `@luncliff (Park DongHa) `_ and + `@risa2000 `_. + +* Improved documentation (`#1276 `_, + `#1291 `_, + `#1296 `_, + `#1315 `_, + `#1332 `_, + `#1337 `_, + `#1395 `_ + `#1418 `_). + Thanks + `@waywardmonkeys (Bruce Mitchener) `_, + `@pauldreik (Paul Dreik) `_, + `@jackoalan (Jack Andersen) `_. + +* Various code improvements + (`#1358 `_, + `#1407 `_). + Thanks `@orivej (Orivej Desh) `_, + `@dpacbach (David P. Sicilia) `_, + +* Fixed compile-time format string checks for user-defined types + (`#1292 `_). + +* Worked around a false positive in ``unsigned-integer-overflow`` sanitizer + (`#1377 `_). + +* Fixed various warnings and compilation issues + (`#1273 `_, + `#1278 `_, + `#1280 `_, + `#1281 `_, + `#1288 `_, + `#1290 `_, + `#1301 `_, + `#1305 `_, + `#1306 `_, + `#1309 `_, + `#1312 `_, + `#1313 `_, + `#1316 `_, + `#1319 `_, + `#1320 `_, + `#1326 `_, + `#1328 `_, + `#1344 `_, + `#1345 `_, + `#1347 `_, + `#1349 `_, + `#1354 `_, + `#1362 `_, + `#1366 `_, + `#1364 `_, + `#1370 `_, + `#1371 `_, + `#1385 `_, + `#1388 `_, + `#1397 `_, + `#1414 `_, + `#1416 `_, + `#1422 `_ + `#1427 `_, + `#1431 `_, + `#1433 `_). + Thanks `@hhb `_, + `@gsjaardema (Greg Sjaardema) `_, + `@gabime (Gabi Melman) `_, + `@neheb (Rosen Penev) `_, + `@vedranmiletic (Vedran Miletić) `_, + `@dkavolis (Daumantas Kavolis) `_, + `@mwinterb `_, + `@orivej (Orivej Desh) `_, + `@denizevrenci (Deniz Evrenci) `_ + `@leonklingele `_, + `@chronoxor (Ivan Shynkarenka) `_, + `@kent-tri `_, + `@0x8000-0000 (Florin Iucha) `_, + `@marti4d (Chris Martin) `_. + +6.0.0 - 2019-08-26 +------------------ + +* Switched to the `MIT license + `_ + with an optional exception that allows distributing binary code without + attribution. + +* Floating-point formatting is now locale-independent by default: + + .. code:: c++ + + #include + #include + + int main() { + std::locale::global(std::locale("ru_RU.UTF-8")); + fmt::print("value = {}", 4.2); + } + + prints "value = 4.2" regardless of the locale. + + For locale-specific formatting use the ``n`` specifier: + + .. code:: c++ + + std::locale::global(std::locale("ru_RU.UTF-8")); + fmt::print("value = {:n}", 4.2); + + prints "value = 4,2". + +* Added an experimental Grisu floating-point formatting algorithm + implementation (disabled by default). To enable it compile with the + ``FMT_USE_GRISU`` macro defined to 1: + + .. code:: c++ + + #define FMT_USE_GRISU 1 + #include + + auto s = fmt::format("{}", 4.2); // formats 4.2 using Grisu + + With Grisu enabled, {fmt} is 13x faster than ``std::ostringstream`` (libc++) + and 10x faster than ``sprintf`` on `dtoa-benchmark + `_ (`full results + `_): + + .. image:: https://user-images.githubusercontent.com/576385/ + 54883977-9fe8c000-4e28-11e9-8bde-272d122e7c52.jpg + +* Separated formatting and parsing contexts for consistency with + `C++20 std::format `_, removing the + undocumented ``basic_format_context::parse_context()`` function. + +* Added `oss-fuzz `_ support + (`#1199 `_). + Thanks `@pauldreik (Paul Dreik) `_. + +* ``formatter`` specializations now always take precedence over ``operator<<`` + (`#952 `_): + + .. code:: c++ + + #include + #include + + struct S {}; + + std::ostream& operator<<(std::ostream& os, S) { + return os << 1; + } + + template <> + struct fmt::formatter : fmt::formatter { + auto format(S, format_context& ctx) { + return formatter::format(2, ctx); + } + }; + + int main() { + std::cout << S() << "\n"; // prints 1 using operator<< + fmt::print("{}\n", S()); // prints 2 using formatter + } + +* Introduced the experimental ``fmt::compile`` function that does format string + compilation (`#618 `_, + `#1169 `_, + `#1171 `_): + + .. code:: c++ + + #include + + auto f = fmt::compile("{}"); + std::string s = fmt::format(f, 42); // can be called multiple times to format + // different values + // s == "42" + + It moves the cost of parsing a format string outside of the format function + which can be beneficial when identically formatting many objects of the same + types. Thanks `@stryku (Mateusz Janek) `_. + +* Added the ``%`` format specifier that formats floating-point values as + percentages (`#1060 `_, + `#1069 `_, + `#1071 `_): + + .. code:: c++ + + auto s = fmt::format("{:.1%}", 0.42); // s == "42.0%" + + Thanks `@gawain-bolton (Gawain Bolton) `_. + +* Implemented precision for floating-point durations + (`#1004 `_, + `#1012 `_): + + .. code:: c++ + + auto s = fmt::format("{:.1}", std::chrono::duration(1.234)); + // s == 1.2s + + Thanks `@DanielaE (Daniela Engert) `_. + +* Implemented ``chrono`` format specifiers ``%Q`` and ``%q`` that give the value + and the unit respectively (`#1019 `_): + + .. code:: c++ + + auto value = fmt::format("{:%Q}", 42s); // value == "42" + auto unit = fmt::format("{:%q}", 42s); // unit == "s" + + Thanks `@DanielaE (Daniela Engert) `_. + +* Fixed handling of dynamic width in chrono formatter: + + .. code:: c++ + + auto s = fmt::format("{0:{1}%H:%M:%S}", std::chrono::seconds(12345), 12); + // ^ width argument index ^ width + // s == "03:25:45 " + + Thanks Howard Hinnant. + +* Removed deprecated ``fmt/time.h``. Use ``fmt/chrono.h`` instead. + +* Added ``fmt::format`` and ``fmt::vformat`` overloads that take ``text_style`` + (`#993 `_, + `#994 `_): + + .. code:: c++ + + #include + + std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red), + "The answer is {}.", 42); + + Thanks `@Naios (Denis Blank) `_. + +* Removed the deprecated color API (``print_colored``). Use the new API, namely + ``print`` overloads that take ``text_style`` instead. + +* Made ``std::unique_ptr`` and ``std::shared_ptr`` formattable as pointers via + ``fmt::ptr`` (`#1121 `_): + + .. code:: c++ + + std::unique_ptr p = ...; + fmt::print("{}", fmt::ptr(p)); // prints p as a pointer + + Thanks `@sighingnow (Tao He) `_. + +* Made ``print`` and ``vprint`` report I/O errors + (`#1098 `_, + `#1099 `_). + Thanks `@BillyDonahue (Billy Donahue) `_. + +* Marked deprecated APIs with the ``[[deprecated]]`` attribute and removed + internal uses of deprecated APIs + (`#1022 `_). + Thanks `@eliaskosunen (Elias Kosunen) `_. + +* Modernized the codebase using more C++11 features and removing workarounds. + Most importantly, ``buffer_context`` is now an alias template, so + use ``buffer_context`` instead of ``buffer_context::type``. + These features require GCC 4.8 or later. + +* ``formatter`` specializations now always take precedence over implicit + conversions to ``int`` and the undocumented ``convert_to_int`` trait + is now deprecated. + +* Moved the undocumented ``basic_writer``, ``writer``, and ``wwriter`` types + to the ``internal`` namespace. + +* Removed deprecated ``basic_format_context::begin()``. Use ``out()`` instead. + +* Disallowed passing the result of ``join`` as an lvalue to prevent misuse. + +* Refactored the undocumented structs that represent parsed format specifiers + to simplify the API and allow multibyte fill. + +* Moved SFINAE to template parameters to reduce symbol sizes. + +* Switched to ``fputws`` for writing wide strings so that it's no longer + required to call ``_setmode`` on Windows + (`#1229 `_, + `#1243 `_). + Thanks `@jackoalan (Jack Andersen) `_. + +* Improved literal-based API + (`#1254 `_). + Thanks `@sylveon (Charles Milette) `_. + +* Added support for exotic platforms without ``uintptr_t`` such as IBM i + (AS/400) which has 128-bit pointers and only 64-bit integers + (`#1059 `_). + +* Added `Sublime Text syntax highlighting config + `_ + (`#1037 `_). + Thanks `@Kronuz (Germán Méndez Bravo) `_. + +* Added the ``FMT_ENFORCE_COMPILE_STRING`` macro to enforce the use of + compile-time format strings + (`#1231 `_). + Thanks `@jackoalan (Jack Andersen) `_. + +* Stopped setting ``CMAKE_BUILD_TYPE`` if {fmt} is a subproject + (`#1081 `_). + +* Various build improvements + (`#1039 `_, + `#1078 `_, + `#1091 `_, + `#1103 `_, + `#1177 `_). + Thanks `@luncliff (Park DongHa) `_, + `@jasonszang (Jason Shuo Zang) `_, + `@olafhering (Olaf Hering) `_, + `@Lecetem `_, + `@pauldreik (Paul Dreik) `_. + +* Improved documentation + (`#1049 `_, + `#1051 `_, + `#1083 `_, + `#1113 `_, + `#1114 `_, + `#1146 `_, + `#1180 `_, + `#1250 `_, + `#1252 `_, + `#1265 `_). + Thanks `@mikelui (Michael Lui) `_, + `@foonathan (Jonathan Müller) `_, + `@BillyDonahue (Billy Donahue) `_, + `@jwakely (Jonathan Wakely) `_, + `@kaisbe (Kais Ben Salah) `_, + `@sdebionne (Samuel Debionne) `_. + +* Fixed ambiguous formatter specialization in ``fmt/ranges.h`` + (`#1123 `_). + +* Fixed formatting of a non-empty ``std::filesystem::path`` which is an + infinitely deep range of its components + (`#1268 `_). + +* Fixed handling of general output iterators when formatting characters + (`#1056 `_, + `#1058 `_). + Thanks `@abolz (Alexander Bolz) `_. + +* Fixed handling of output iterators in ``formatter`` specialization for + ranges (`#1064 `_). + +* Fixed handling of exotic character types + (`#1188 `_). + +* Made chrono formatting work with exceptions disabled + (`#1062 `_). + +* Fixed DLL visibility issues + (`#1134 `_, + `#1147 `_). + Thanks `@denchat `_. + +* Disabled the use of UDL template extension on GCC 9 + (`#1148 `_). + +* Removed misplaced ``format`` compile-time checks from ``printf`` + (`#1173 `_). + +* Fixed issues in the experimental floating-point formatter + (`#1072 `_, + `#1129 `_, + `#1153 `_, + `#1155 `_, + `#1210 `_, + `#1222 `_). + Thanks `@alabuzhev (Alex Alabuzhev) `_. + +* Fixed bugs discovered by fuzzing or during fuzzing integration + (`#1124 `_, + `#1127 `_, + `#1132 `_, + `#1135 `_, + `#1136 `_, + `#1141 `_, + `#1142 `_, + `#1178 `_, + `#1179 `_, + `#1194 `_). + Thanks `@pauldreik (Paul Dreik) `_. + +* Fixed building tests on FreeBSD and Hurd + (`#1043 `_). + Thanks `@jackyf (Eugene V. Lyubimkin) `_. + +* Fixed various warnings and compilation issues + (`#998 `_, + `#1006 `_, + `#1008 `_, + `#1011 `_, + `#1025 `_, + `#1027 `_, + `#1028 `_, + `#1029 `_, + `#1030 `_, + `#1031 `_, + `#1054 `_, + `#1063 `_, + `#1068 `_, + `#1074 `_, + `#1075 `_, + `#1079 `_, + `#1086 `_, + `#1088 `_, + `#1089 `_, + `#1094 `_, + `#1101 `_, + `#1102 `_, + `#1105 `_, + `#1107 `_, + `#1115 `_, + `#1117 `_, + `#1118 `_, + `#1120 `_, + `#1123 `_, + `#1139 `_, + `#1140 `_, + `#1143 `_, + `#1144 `_, + `#1150 `_, + `#1151 `_, + `#1152 `_, + `#1154 `_, + `#1156 `_, + `#1159 `_, + `#1175 `_, + `#1181 `_, + `#1186 `_, + `#1187 `_, + `#1191 `_, + `#1197 `_, + `#1200 `_, + `#1203 `_, + `#1205 `_, + `#1206 `_, + `#1213 `_, + `#1214 `_, + `#1217 `_, + `#1228 `_, + `#1230 `_, + `#1232 `_, + `#1235 `_, + `#1236 `_, + `#1240 `_). + Thanks `@DanielaE (Daniela Engert) `_, + `@mwinterb `_, + `@eliaskosunen (Elias Kosunen) `_, + `@morinmorin `_, + `@ricco19 (Brian Ricciardelli) `_, + `@waywardmonkeys (Bruce Mitchener) `_, + `@chronoxor (Ivan Shynkarenka) `_, + `@remyabel `_, + `@pauldreik (Paul Dreik) `_, + `@gsjaardema (Greg Sjaardema) `_, + `@rcane (Ronny Krüger) `_, + `@mocabe `_, + `@denchat `_, + `@cjdb (Christopher Di Bella) `_, + `@HazardyKnusperkeks (Björn Schäpers) `_, + `@vedranmiletic (Vedran Miletić) `_, + `@jackoalan (Jack Andersen) `_, + `@DaanDeMeyer (Daan De Meyer) `_, + `@starkmapper (Mark Stapper) `_. + +5.3.0 - 2018-12-28 +------------------ + +* Introduced experimental chrono formatting support: + + .. code:: c++ + + #include + + int main() { + using namespace std::literals::chrono_literals; + fmt::print("Default format: {} {}\n", 42s, 100ms); + fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s); + } + + prints:: + + Default format: 42s 100ms + strftime-like format: 03:15:30 + +* Added experimental support for emphasis (bold, italic, underline, + strikethrough), colored output to a file stream, and improved colored + formatting API + (`#961 `_, + `#967 `_, + `#973 `_): + + .. code:: c++ + + #include + + int main() { + print(fg(fmt::color::crimson) | fmt::emphasis::bold, + "Hello, {}!\n", "world"); + print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) | + fmt::emphasis::underline, "Hello, {}!\n", "мир"); + print(fg(fmt::color::steel_blue) | fmt::emphasis::italic, + "Hello, {}!\n", "世界"); + } + + prints the following on modern terminals with RGB color support: + + .. image:: https://user-images.githubusercontent.com/576385/ + 50405788-b66e7500-076e-11e9-9592-7324d1f951d8.png + + Thanks `@Rakete1111 (Nicolas) `_. + +* Added support for 4-bit terminal colors + (`#968 `_, + `#974 `_) + + .. code:: c++ + + #include + + int main() { + print(fg(fmt::terminal_color::red), "stop\n"); + } + + Note that these colors vary by terminal: + + .. image:: https://user-images.githubusercontent.com/576385/ + 50405925-dbfc7e00-0770-11e9-9b85-333fab0af9ac.png + + Thanks `@Rakete1111 (Nicolas) `_. + +* Parameterized formatting functions on the type of the format string + (`#880 `_, + `#881 `_, + `#883 `_, + `#885 `_, + `#897 `_, + `#920 `_). + Any object of type ``S`` that has an overloaded ``to_string_view(const S&)`` + returning ``fmt::string_view`` can be used as a format string: + + .. code:: c++ + + namespace my_ns { + inline string_view to_string_view(const my_string& s) { + return {s.data(), s.length()}; + } + } + + std::string message = fmt::format(my_string("The answer is {}."), 42); + + Thanks `@DanielaE (Daniela Engert) `_. + +* Made ``std::string_view`` work as a format string + (`#898 `_): + + .. code:: c++ + + auto message = fmt::format(std::string_view("The answer is {}."), 42); + + Thanks `@DanielaE (Daniela Engert) `_. + +* Added wide string support to compile-time format string checks + (`#924 `_): + + .. code:: c++ + + print(fmt(L"{:f}"), 42); // compile-time error: invalid type specifier + + Thanks `@XZiar `_. + +* Made colored print functions work with wide strings + (`#867 `_): + + .. code:: c++ + + #include + + int main() { + print(fg(fmt::color::red), L"{}\n", 42); + } + + Thanks `@DanielaE (Daniela Engert) `_. + +* Introduced experimental Unicode support + (`#628 `_, + `#891 `_): + + .. code:: c++ + + using namespace fmt::literals; + auto s = fmt::format("{:*^5}"_u, "🤡"_u); // s == "**🤡**"_u + +* Improved locale support: + + .. code:: c++ + + #include + + struct numpunct : std::numpunct { + protected: + char do_thousands_sep() const override { return '~'; } + }; + + std::locale loc; + auto s = fmt::format(std::locale(loc, new numpunct()), "{:n}", 1234567); + // s == "1~234~567" + +* Constrained formatting functions on proper iterator types + (`#921 `_). + Thanks `@DanielaE (Daniela Engert) `_. + +* Added ``make_printf_args`` and ``make_wprintf_args`` functions + (`#934 `_). + Thanks `@tnovotny `_. + +* Deprecated ``fmt::visit``, ``parse_context``, and ``wparse_context``. + Use ``fmt::visit_format_arg``, ``format_parse_context``, and + ``wformat_parse_context`` instead. + +* Removed undocumented ``basic_fixed_buffer`` which has been superseded by the + iterator-based API + (`#873 `_, + `#902 `_). + Thanks `@superfunc (hollywood programmer) `_. + +* Disallowed repeated leading zeros in an argument ID: + + .. code:: c++ + + fmt::print("{000}", 42); // error + +* Reintroduced support for gcc 4.4. + +* Fixed compilation on platforms with exotic ``double`` + (`#878 `_). + +* Improved documentation + (`#164 `_, + `#877 `_, + `#901 `_, + `#906 `_, + `#979 `_). + Thanks `@kookjr (Mathew Cucuzella) `_, + `@DarkDimius (Dmitry Petrashko) `_, + `@HecticSerenity `_. + +* Added pkgconfig support which makes it easier to consume the library from + meson and other build systems + (`#916 `_). + Thanks `@colemickens (Cole Mickens) `_. + +* Various build improvements + (`#909 `_, + `#926 `_, + `#937 `_, + `#953 `_, + `#959 `_). + Thanks `@tchaikov (Kefu Chai) `_, + `@luncliff (Park DongHa) `_, + `@AndreasSchoenle (Andreas Schönle) `_, + `@hotwatermorning `_, + `@Zefz (JohanJansen) `_. + +* Improved ``string_view`` construction performance + (`#914 `_). + Thanks `@gabime (Gabi Melman) `_. + +* Fixed non-matching char types + (`#895 `_). + Thanks `@DanielaE (Daniela Engert) `_. + +* Fixed ``format_to_n`` with ``std::back_insert_iterator`` + (`#913 `_). + Thanks `@DanielaE (Daniela Engert) `_. + +* Fixed locale-dependent formatting + (`#905 `_). + +* Fixed various compiler warnings and errors + (`#882 `_, + `#886 `_, + `#933 `_, + `#941 `_, + `#931 `_, + `#943 `_, + `#954 `_, + `#956 `_, + `#962 `_, + `#965 `_, + `#977 `_, + `#983 `_, + `#989 `_). + Thanks `@Luthaf (Guillaume Fraux) `_, + `@stevenhoving (Steven Hoving) `_, + `@christinaa (Kristina Brooks) `_, + `@lgritz (Larry Gritz) `_, + `@DanielaE (Daniela Engert) `_, + `@0x8000-0000 (Sign Bit) `_, + `@liuping1997 `_. + +5.2.1 - 2018-09-21 +------------------ + +* Fixed ``visit`` lookup issues on gcc 7 & 8 + (`#870 `_). + Thanks `@medithe `_. + +* Fixed linkage errors on older gcc. + +* Prevented ``fmt/range.h`` from specializing ``fmt::basic_string_view`` + (`#865 `_, + `#868 `_). + Thanks `@hhggit (dual) `_. + +* Improved error message when formatting unknown types + (`#872 `_). + Thanks `@foonathan (Jonathan Müller) `_, + +* Disabled templated user-defined literals when compiled under nvcc + (`#875 `_). + Thanks `@CandyGumdrop (Candy Gumdrop) `_, + +* Fixed ``format_to`` formatting to ``wmemory_buffer`` + (`#874 `_). + +5.2.0 - 2018-09-13 +------------------ + +* Optimized format string parsing and argument processing which resulted in up + to 5x speed up on long format strings and significant performance boost on + various benchmarks. For example, version 5.2 is 2.22x faster than 5.1 on + decimal integer formatting with ``format_to`` (macOS, clang-902.0.39.2): + + ================== ======= ======= + Method Time, s Speedup + ================== ======= ======= + fmt::format 5.1 0.58 + fmt::format 5.2 0.35 1.66x + fmt::format_to 5.1 0.51 + fmt::format_to 5.2 0.23 2.22x + sprintf 0.71 + std::to_string 1.01 + std::stringstream 1.73 + ================== ======= ======= + +* Changed the ``fmt`` macro from opt-out to opt-in to prevent name collisions. + To enable it define the ``FMT_STRING_ALIAS`` macro to 1 before including + ``fmt/format.h``: + + .. code:: c++ + + #define FMT_STRING_ALIAS 1 + #include + std::string answer = format(fmt("{}"), 42); + +* Added compile-time format string checks to ``format_to`` overload that takes + ``fmt::memory_buffer`` (`#783 `_): + + .. code:: c++ + + fmt::memory_buffer buf; + // Compile-time error: invalid type specifier. + fmt::format_to(buf, fmt("{:d}"), "foo"); + +* Moved experimental color support to ``fmt/color.h`` and enabled the + new API by default. The old API can be enabled by defining the + ``FMT_DEPRECATED_COLORS`` macro. + +* Added formatting support for types explicitly convertible to + ``fmt::string_view``: + + .. code:: c++ + + struct foo { + explicit operator fmt::string_view() const { return "foo"; } + }; + auto s = format("{}", foo()); + + In particular, this makes formatting function work with + ``folly::StringPiece``. + +* Implemented preliminary support for ``char*_t`` by replacing the ``format`` + function overloads with a single function template parameterized on the string + type. + +* Added support for dynamic argument lists + (`#814 `_, + `#819 `_). + Thanks `@MikePopoloski (Michael Popoloski) + `_. + +* Reduced executable size overhead for embedded targets using newlib nano by + making locale dependency optional + (`#839 `_). + Thanks `@teajay-fr (Thomas Benard) `_. + +* Keep ``noexcept`` specifier when exceptions are disabled + (`#801 `_, + `#810 `_). + Thanks `@qis (Alexej Harm) `_. + +* Fixed formatting of user-defined types providing ``operator<<`` with + ``format_to_n`` + (`#806 `_). + Thanks `@mkurdej (Marek Kurdej) `_. + +* Fixed dynamic linkage of new symbols + (`#808 `_). + +* Fixed global initialization issue + (`#807 `_): + + .. code:: c++ + + // This works on compilers with constexpr support. + static const std::string answer = fmt::format("{}", 42); + +* Fixed various compiler warnings and errors + (`#804 `_, + `#809 `_, + `#811 `_, + `#822 `_, + `#827 `_, + `#830 `_, + `#838 `_, + `#843 `_, + `#844 `_, + `#851 `_, + `#852 `_, + `#854 `_). + Thanks `@henryiii (Henry Schreiner) `_, + `@medithe `_, and + `@eliasdaler (Elias Daler) `_. + +5.1.0 - 2018-07-05 +------------------ + +* Added experimental support for RGB color output enabled with + the ``FMT_EXTENDED_COLORS`` macro: + + .. code:: c++ + + #define FMT_EXTENDED_COLORS + #define FMT_HEADER_ONLY // or compile fmt with FMT_EXTENDED_COLORS defined + #include + + fmt::print(fmt::color::steel_blue, "Some beautiful text"); + + The old API (the ``print_colored`` and ``vprint_colored`` functions and the + ``color`` enum) is now deprecated. + (`#762 `_ + `#767 `_). + thanks `@Remotion (Remo) `_. + +* Added quotes to strings in ranges and tuples + (`#766 `_). + Thanks `@Remotion (Remo) `_. + +* Made ``format_to`` work with ``basic_memory_buffer`` + (`#776 `_). + +* Added ``vformat_to_n`` and ``wchar_t`` overload of ``format_to_n`` + (`#764 `_, + `#769 `_). + +* Made ``is_range`` and ``is_tuple_like`` part of public (experimental) API + to allow specialization for user-defined types + (`#751 `_, + `#759 `_). + Thanks `@drrlvn (Dror Levin) `_. + +* Added more compilers to continuous integration and increased ``FMT_PEDANTIC`` + warning levels + (`#736 `_). + Thanks `@eliaskosunen (Elias Kosunen) `_. + +* Fixed compilation with MSVC 2013. + +* Fixed handling of user-defined types in ``format_to`` + (`#793 `_). + +* Forced linking of inline ``vformat`` functions into the library + (`#795 `_). + +* Fixed incorrect call to on_align in ``'{:}='`` + (`#750 `_). + +* Fixed floating-point formatting to a non-back_insert_iterator with sign & + numeric alignment specified + (`#756 `_). + +* Fixed formatting to an array with ``format_to_n`` + (`#778 `_). + +* Fixed formatting of more than 15 named arguments + (`#754 `_). + +* Fixed handling of compile-time strings when including ``fmt/ostream.h``. + (`#768 `_). + +* Fixed various compiler warnings and errors + (`#742 `_, + `#748 `_, + `#752 `_, + `#770 `_, + `#775 `_, + `#779 `_, + `#780 `_, + `#790 `_, + `#792 `_, + `#800 `_). + Thanks `@Remotion (Remo) `_, + `@gabime (Gabi Melman) `_, + `@foonathan (Jonathan Müller) `_, + `@Dark-Passenger (Dhruv Paranjape) `_, and + `@0x8000-0000 (Sign Bit) `_. + +5.0.0 - 2018-05-21 +------------------ + +* Added a requirement for partial C++11 support, most importantly variadic + templates and type traits, and dropped ``FMT_VARIADIC_*`` emulation macros. + Variadic templates are available since GCC 4.4, Clang 2.9 and MSVC 18.0 (2013). + For older compilers use {fmt} `version 4.x + `_ which continues to be + maintained and works with C++98 compilers. + +* Renamed symbols to follow standard C++ naming conventions and proposed a subset + of the library for standardization in `P0645R2 Text Formatting + `_. + +* Implemented ``constexpr`` parsing of format strings and `compile-time format + string checks + `_. For + example + + .. code:: c++ + + #include + + std::string s = format(fmt("{:d}"), "foo"); + + gives a compile-time error because ``d`` is an invalid specifier for strings + (`godbolt `__):: + + ... + :4:19: note: in instantiation of function template specialization 'fmt::v5::format' requested here + std::string s = format(fmt("{:d}"), "foo"); + ^ + format.h:1337:13: note: non-constexpr function 'on_error' cannot be used in a constant expression + handler.on_error("invalid type specifier"); + + Compile-time checks require relaxed ``constexpr`` (C++14 feature) support. If + the latter is not available, checks will be performed at runtime. + +* Separated format string parsing and formatting in the extension API to enable + compile-time format string processing. For example + + .. code:: c++ + + struct Answer {}; + + namespace fmt { + template <> + struct formatter { + constexpr auto parse(parse_context& ctx) { + auto it = ctx.begin(); + spec = *it; + if (spec != 'd' && spec != 's') + throw format_error("invalid specifier"); + return ++it; + } + + template + auto format(Answer, FormatContext& ctx) { + return spec == 's' ? + format_to(ctx.begin(), "{}", "fourty-two") : + format_to(ctx.begin(), "{}", 42); + } + + char spec = 0; + }; + } + + std::string s = format(fmt("{:x}"), Answer()); + + gives a compile-time error due to invalid format specifier (`godbolt + `__):: + + ... + :12:45: error: expression '' is not a constant expression + throw format_error("invalid specifier"); + +* Added `iterator support + `_: + + .. code:: c++ + + #include + #include + + std::vector out; + fmt::format_to(std::back_inserter(out), "{}", 42); + +* Added the `format_to_n + `_ + function that restricts the output to the specified number of characters + (`#298 `_): + + .. code:: c++ + + char out[4]; + fmt::format_to_n(out, sizeof(out), "{}", 12345); + // out == "1234" (without terminating '\0') + +* Added the `formatted_size + `_ + function for computing the output size: + + .. code:: c++ + + #include + + auto size = fmt::formatted_size("{}", 12345); // size == 5 + +* Improved compile times by reducing dependencies on standard headers and + providing a lightweight `core API `_: + + .. code:: c++ + + #include + + fmt::print("The answer is {}.", 42); + + See `Compile time and code bloat + `_. + +* Added the `make_format_args + `_ + function for capturing formatting arguments: + + .. code:: c++ + + // Prints formatted error message. + void vreport_error(const char *format, fmt::format_args args) { + fmt::print("Error: "); + fmt::vprint(format, args); + } + template + void report_error(const char *format, const Args & ... args) { + vreport_error(format, fmt::make_format_args(args...)); + } + +* Added the ``make_printf_args`` function for capturing ``printf`` arguments + (`#687 `_, + `#694 `_). + Thanks `@Kronuz (Germán Méndez Bravo) `_. + +* Added prefix ``v`` to non-variadic functions taking ``format_args`` to + distinguish them from variadic ones: + + .. code:: c++ + + std::string vformat(string_view format_str, format_args args); + + template + std::string format(string_view format_str, const Args & ... args); + +* Added experimental support for formatting ranges, containers and tuple-like + types in ``fmt/ranges.h`` (`#735 `_): + + .. code:: c++ + + #include + + std::vector v = {1, 2, 3}; + fmt::print("{}", v); // prints {1, 2, 3} + + Thanks `@Remotion (Remo) `_. + +* Implemented ``wchar_t`` date and time formatting + (`#712 `_): + + .. code:: c++ + + #include + + std::time_t t = std::time(nullptr); + auto s = fmt::format(L"The date is {:%Y-%m-%d}.", *std::localtime(&t)); + + Thanks `@DanielaE (Daniela Engert) `_. + +* Provided more wide string overloads + (`#724 `_). + Thanks `@DanielaE (Daniela Engert) `_. + +* Switched from a custom null-terminated string view class to ``string_view`` + in the format API and provided ``fmt::string_view`` which implements a subset + of ``std::string_view`` API for pre-C++17 systems. + +* Added support for ``std::experimental::string_view`` + (`#607 `_): + + .. code:: c++ + + #include + #include + + fmt::print("{}", std::experimental::string_view("foo")); + + Thanks `@virgiliofornazin (Virgilio Alexandre Fornazin) + `__. + +* Allowed mixing named and automatic arguments: + + .. code:: c++ + + fmt::format("{} {two}", 1, fmt::arg("two", 2)); + +* Removed the write API in favor of the `format API + `_ with compile-time handling of + format strings. + +* Disallowed formatting of multibyte strings into a wide character target + (`#606 `_). + +* Improved documentation + (`#515 `_, + `#614 `_, + `#617 `_, + `#661 `_, + `#680 `_). + Thanks `@ibell (Ian Bell) `_, + `@mihaitodor (Mihai Todor) `_, and + `@johnthagen `_. + +* Implemented more efficient handling of large number of format arguments. + +* Introduced an inline namespace for symbol versioning. + +* Added debug postfix ``d`` to the ``fmt`` library name + (`#636 `_). + +* Removed unnecessary ``fmt/`` prefix in includes + (`#397 `_). + Thanks `@chronoxor (Ivan Shynkarenka) `_. + +* Moved ``fmt/*.h`` to ``include/fmt/*.h`` to prevent irrelevant files and + directories appearing on the include search paths when fmt is used as a + subproject and moved source files to the ``src`` directory. + +* Added qmake project file ``support/fmt.pro`` + (`#641 `_). + Thanks `@cowo78 (Giuseppe Corbelli) `_. + +* Added Gradle build file ``support/build.gradle`` + (`#649 `_). + Thanks `@luncliff (Park DongHa) `_. + +* Removed ``FMT_CPPFORMAT`` CMake option. + +* Fixed a name conflict with the macro ``CHAR_WIDTH`` in glibc + (`#616 `_). + Thanks `@aroig (Abdó Roig-Maranges) `_. + +* Fixed handling of nested braces in ``fmt::join`` + (`#638 `_). + +* Added ``SOURCELINK_SUFFIX`` for compatibility with Sphinx 1.5 + (`#497 `_). + Thanks `@ginggs (Graham Inggs) `_. + +* Added a missing ``inline`` in the header-only mode + (`#626 `_). + Thanks `@aroig (Abdó Roig-Maranges) `_. + +* Fixed various compiler warnings + (`#640 `_, + `#656 `_, + `#679 `_, + `#681 `_, + `#705 `__, + `#715 `_, + `#717 `_, + `#720 `_, + `#723 `_, + `#726 `_, + `#730 `_, + `#739 `_). + Thanks `@peterbell10 `_, + `@LarsGullik `_, + `@foonathan (Jonathan Müller) `_, + `@eliaskosunen (Elias Kosunen) `_, + `@christianparpart (Christian Parpart) `_, + `@DanielaE (Daniela Engert) `_, + and `@mwinterb `_. + +* Worked around an MSVC bug and fixed several warnings + (`#653 `_). + Thanks `@alabuzhev (Alex Alabuzhev) `_. + +* Worked around GCC bug 67371 + (`#682 `_). + +* Fixed compilation with ``-fno-exceptions`` + (`#655 `_). + Thanks `@chenxiaolong (Andrew Gunnerson) `_. + +* Made ``constexpr remove_prefix`` gcc version check tighter + (`#648 `_). + +* Renamed internal type enum constants to prevent collision with poorly written + C libraries (`#644 `_). + +* Added detection of ``wostream operator<<`` + (`#650 `_). + +* Fixed compilation on OpenBSD + (`#660 `_). + Thanks `@hubslave `_. + +* Fixed compilation on FreeBSD 12 + (`#732 `_). + Thanks `@dankm `_. + +* Fixed compilation when there is a mismatch between ``-std`` options between + the library and user code + (`#664 `_). + +* Fixed compilation with GCC 7 and ``-std=c++11`` + (`#734 `_). + +* Improved generated binary code on GCC 7 and older + (`#668 `_). + +* Fixed handling of numeric alignment with no width + (`#675 `_). + +* Fixed handling of empty strings in UTF8/16 converters + (`#676 `_). + Thanks `@vgalka-sl (Vasili Galka) `_. + +* Fixed formatting of an empty ``string_view`` + (`#689 `_). + +* Fixed detection of ``string_view`` on libc++ + (`#686 `_). + +* Fixed DLL issues (`#696 `_). + Thanks `@sebkoenig `_. + +* Fixed compile checks for mixing narrow and wide strings + (`#690 `_). + +* Disabled unsafe implicit conversion to ``std::string`` + (`#729 `_). + +* Fixed handling of reused format specs (as in ``fmt::join``) for pointers + (`#725 `_). + Thanks `@mwinterb `_. + +* Fixed installation of ``fmt/ranges.h`` + (`#738 `_). + Thanks `@sv1990 `_. + +4.1.0 - 2017-12-20 +------------------ + +* Added ``fmt::to_wstring()`` in addition to ``fmt::to_string()`` + (`#559 `_). + Thanks `@alabuzhev (Alex Alabuzhev) `_. + +* Added support for C++17 ``std::string_view`` + (`#571 `_ and + `#578 `_). + Thanks `@thelostt (Mário Feroldi) `_ and + `@mwinterb `_. + +* Enabled stream exceptions to catch errors + (`#581 `_). + Thanks `@crusader-mike `_. + +* Allowed formatting of class hierarchies with ``fmt::format_arg()`` + (`#547 `_). + Thanks `@rollbear (Björn Fahller) `_. + +* Removed limitations on character types + (`#563 `_). + Thanks `@Yelnats321 (Elnar Dakeshov) `_. + +* Conditionally enabled use of ``std::allocator_traits`` + (`#583 `_). + Thanks `@mwinterb `_. + +* Added support for ``const`` variadic member function emulation with + ``FMT_VARIADIC_CONST`` (`#591 `_). + Thanks `@ludekvodicka (Ludek Vodicka) `_. + +* Various bugfixes: bad overflow check, unsupported implicit type conversion + when determining formatting function, test segfaults + (`#551 `_), ill-formed macros + (`#542 `_) and ambiguous overloads + (`#580 `_). + Thanks `@xylosper (Byoung-young Lee) `_. + +* Prevented warnings on MSVC (`#605 `_, + `#602 `_, and + `#545 `_), + clang (`#582 `_), + GCC (`#573 `_), + various conversion warnings (`#609 `_, + `#567 `_, + `#553 `_ and + `#553 `_), and added ``override`` and + ``[[noreturn]]`` (`#549 `_ and + `#555 `_). + Thanks `@alabuzhev (Alex Alabuzhev) `_, + `@virgiliofornazin (Virgilio Alexandre Fornazin) + `_, + `@alexanderbock (Alexander Bock) `_, + `@yumetodo `_, + `@VaderY (Császár Mátyás) `_, + `@jpcima (JP Cimalando) `_, + `@thelostt (Mário Feroldi) `_, and + `@Manu343726 (Manu Sánchez) `_. + +* Improved CMake: Used ``GNUInstallDirs`` to set installation location + (`#610 `_) and fixed warnings + (`#536 `_ and + `#556 `_). + Thanks `@mikecrowe (Mike Crowe) `_, + `@evgen231 `_ and + `@henryiii (Henry Schreiner) `_. + +4.0.0 - 2017-06-27 +------------------ + +* Removed old compatibility headers ``cppformat/*.h`` and CMake options + (`#527 `_). + Thanks `@maddinat0r (Alex Martin) `_. + +* Added ``string.h`` containing ``fmt::to_string()`` as alternative to + ``std::to_string()`` as well as other string writer functionality + (`#326 `_ and + `#441 `_): + + .. code:: c++ + + #include "fmt/string.h" + + std::string answer = fmt::to_string(42); + + Thanks to `@glebov-andrey (Andrey Glebov) + `_. + +* Moved ``fmt::printf()`` to new ``printf.h`` header and allowed ``%s`` as + generic specifier (`#453 `_), + made ``%.f`` more conformant to regular ``printf()`` + (`#490 `_), added custom writer + support (`#476 `_) and implemented + missing custom argument formatting + (`#339 `_ and + `#340 `_): + + .. code:: c++ + + #include "fmt/printf.h" + + // %s format specifier can be used with any argument type. + fmt::printf("%s", 42); + + Thanks `@mojoBrendan `_, + `@manylegged (Arthur Danskin) `_ and + `@spacemoose (Glen Stark) `_. + See also `#360 `_, + `#335 `_ and + `#331 `_. + +* Added ``container.h`` containing a ``BasicContainerWriter`` + to write to containers like ``std::vector`` + (`#450 `_). + Thanks `@polyvertex (Jean-Charles Lefebvre) `_. + +* Added ``fmt::join()`` function that takes a range and formats + its elements separated by a given string + (`#466 `_): + + .. code:: c++ + + #include "fmt/format.h" + + std::vector v = {1.2, 3.4, 5.6}; + // Prints "(+01.20, +03.40, +05.60)". + fmt::print("({:+06.2f})", fmt::join(v.begin(), v.end(), ", ")); + + Thanks `@olivier80 `_. + +* Added support for custom formatting specifications to simplify customization + of built-in formatting (`#444 `_). + Thanks `@polyvertex (Jean-Charles Lefebvre) `_. + See also `#439 `_. + +* Added ``fmt::format_system_error()`` for error code formatting + (`#323 `_ and + `#526 `_). + Thanks `@maddinat0r (Alex Martin) `_. + +* Added thread-safe ``fmt::localtime()`` and ``fmt::gmtime()`` + as replacement for the standard version to ``time.h`` + (`#396 `_). + Thanks `@codicodi `_. + +* Internal improvements to ``NamedArg`` and ``ArgLists`` + (`#389 `_ and + `#390 `_). + Thanks `@chronoxor `_. + +* Fixed crash due to bug in ``FormatBuf`` + (`#493 `_). + Thanks `@effzeh `_. See also + `#480 `_ and + `#491 `_. + +* Fixed handling of wide strings in ``fmt::StringWriter``. + +* Improved compiler error messages + (`#357 `_). + +* Fixed various warnings and issues with various compilers + (`#494 `_, + `#499 `_, + `#483 `_, + `#485 `_, + `#482 `_, + `#475 `_, + `#473 `_ and + `#414 `_). + Thanks `@chronoxor `_, + `@zhaohuaxishi `_, + `@pkestene (Pierre Kestener) `_, + `@dschmidt (Dominik Schmidt) `_ and + `@0x414c (Alexey Gorishny) `_ . + +* Improved CMake: targets are now namespaced + (`#511 `_ and + `#513 `_), supported header-only + ``printf.h`` (`#354 `_), fixed issue + with minimal supported library subset + (`#418 `_, + `#419 `_ and + `#420 `_). + Thanks `@bjoernthiel (Bjoern Thiel) `_, + `@niosHD (Mario Werner) `_, + `@LogicalKnight (Sean LK) `_ and + `@alabuzhev (Alex Alabuzhev) `_. + +* Improved documentation. Thanks to + `@pwm1234 (Phil) `_ for + `#393 `_. + +3.0.2 - 2017-06-14 +------------------ + +* Added ``FMT_VERSION`` macro + (`#411 `_). + +* Used ``FMT_NULL`` instead of literal ``0`` + (`#409 `_). + Thanks `@alabuzhev (Alex Alabuzhev) `_. + +* Added extern templates for ``format_float`` + (`#413 `_). + +* Fixed implicit conversion issue + (`#507 `_). + +* Fixed signbit detection (`#423 `_). + +* Fixed naming collision (`#425 `_). + +* Fixed missing intrinsic for C++/CLI + (`#457 `_). + Thanks `@calumr (Calum Robinson) `_ + +* Fixed Android detection (`#458 `_). + Thanks `@Gachapen (Magnus Bjerke Vik) `_. + +* Use lean ``windows.h`` if not in header-only mode + (`#503 `_). + Thanks `@Quentin01 (Quentin Buathier) `_. + +* Fixed issue with CMake exporting C++11 flag + (`#445 `_). + Thanks `@EricWF (Eric) `_. + +* Fixed issue with nvcc and MSVC compiler bug and MinGW + (`#505 `_). + +* Fixed DLL issues (`#469 `_ and + `#502 `_). + Thanks `@richardeakin (Richard Eakin) `_ and + `@AndreasSchoenle (Andreas Schönle) `_. + +* Fixed test compilation under FreeBSD + (`#433 `_). + +* Fixed various warnings (`#403 `_, + `#410 `_ and + `#510 `_). + Thanks `@Lecetem `_, + `@chenhayat (Chen Hayat) `_ and + `@trozen `_. + +* Worked around a broken ``__builtin_clz`` in clang with MS codegen + (`#519 `_). + +* Removed redundant include + (`#479 `_). + +* Fixed documentation issues. + +3.0.1 - 2016-11-01 +------------------ +* Fixed handling of thousands separator + (`#353 `_). + +* Fixed handling of ``unsigned char`` strings + (`#373 `_). + +* Corrected buffer growth when formatting time + (`#367 `_). + +* Removed warnings under MSVC and clang + (`#318 `_, + `#250 `_, also merged + `#385 `_ and + `#361 `_). + Thanks `@jcelerier (Jean-Michaël Celerier) `_ + and `@nmoehrle (Nils Moehrle) `_. + +* Fixed compilation issues under Android + (`#327 `_, + `#345 `_ and + `#381 `_), + FreeBSD (`#358 `_), + Cygwin (`#388 `_), + MinGW (`#355 `_) as well as other + issues (`#350 `_, + `#366 `_, + `#348 `_, + `#402 `_, + `#405 `_). + Thanks to `@dpantele (Dmitry) `_, + `@hghwng (Hugh Wang) `_, + `@arvedarved (Tilman Keskinöz) `_, + `@LogicalKnight (Sean) `_ and + `@JanHellwig (Jan Hellwig) `_. + +* Fixed some documentation issues and extended specification + (`#320 `_, + `#333 `_, + `#347 `_, + `#362 `_). + Thanks to `@smellman (Taro Matsuzawa aka. btm) + `_. + +3.0.0 - 2016-05-07 +------------------ + +* The project has been renamed from C++ Format (cppformat) to fmt for + consistency with the used namespace and macro prefix + (`#307 `_). + Library headers are now located in the ``fmt`` directory: + + .. code:: c++ + + #include "fmt/format.h" + + Including ``format.h`` from the ``cppformat`` directory is deprecated + but works via a proxy header which will be removed in the next major version. + + The documentation is now available at https://fmt.dev. + +* Added support for `strftime `_-like + `date and time formatting `_ + (`#283 `_): + + .. code:: c++ + + #include "fmt/time.h" + + std::time_t t = std::time(nullptr); + // Prints "The date is 2016-04-29." (with the current date) + fmt::print("The date is {:%Y-%m-%d}.", *std::localtime(&t)); + +* ``std::ostream`` support including formatting of user-defined types that provide + overloaded ``operator<<`` has been moved to ``fmt/ostream.h``: + + .. code:: c++ + + #include "fmt/ostream.h" + + class Date { + int year_, month_, day_; + public: + Date(int year, int month, int day) : year_(year), month_(month), day_(day) {} + + friend std::ostream &operator<<(std::ostream &os, const Date &d) { + return os << d.year_ << '-' << d.month_ << '-' << d.day_; + } + }; + + std::string s = fmt::format("The date is {}", Date(2012, 12, 9)); + // s == "The date is 2012-12-9" + +* Added support for `custom argument formatters + `_ + (`#235 `_). + +* Added support for locale-specific integer formatting with the ``n`` specifier + (`#305 `_): + + .. code:: c++ + + std::setlocale(LC_ALL, "en_US.utf8"); + fmt::print("cppformat: {:n}\n", 1234567); // prints 1,234,567 + +* Sign is now preserved when formatting an integer with an incorrect ``printf`` + format specifier (`#265 `_): + + .. code:: c++ + + fmt::printf("%lld", -42); // prints -42 + + Note that it would be an undefined behavior in ``std::printf``. + +* Length modifiers such as ``ll`` are now optional in printf formatting + functions and the correct type is determined automatically + (`#255 `_): + + .. code:: c++ + + fmt::printf("%d", std::numeric_limits::max()); + + Note that it would be an undefined behavior in ``std::printf``. + +* Added initial support for custom formatters + (`#231 `_). + +* Fixed detection of user-defined literal support on Intel C++ compiler + (`#311 `_, + `#312 `_). + Thanks to `@dean0x7d (Dean Moldovan) `_ and + `@speth (Ray Speth) `_. + +* Reduced compile time + (`#243 `_, + `#249 `_, + `#317 `_): + + .. image:: https://cloud.githubusercontent.com/assets/4831417/11614060/ + b9e826d2-9c36-11e5-8666-d4131bf503ef.png + + .. image:: https://cloud.githubusercontent.com/assets/4831417/11614080/ + 6ac903cc-9c37-11e5-8165-26df6efae364.png + + Thanks to `@dean0x7d (Dean Moldovan) `_. + +* Compile test fixes (`#313 `_). + Thanks to `@dean0x7d (Dean Moldovan) `_. + +* Documentation fixes (`#239 `_, + `#248 `_, + `#252 `_, + `#258 `_, + `#260 `_, + `#301 `_, + `#309 `_). + Thanks to `@ReadmeCritic `_ + `@Gachapen (Magnus Bjerke Vik) `_ and + `@jwilk (Jakub Wilk) `_. + +* Fixed compiler and sanitizer warnings + (`#244 `_, + `#256 `_, + `#259 `_, + `#263 `_, + `#274 `_, + `#277 `_, + `#286 `_, + `#291 `_, + `#296 `_, + `#308 `_) + Thanks to `@mwinterb `_, + `@pweiskircher (Patrik Weiskircher) `_, + `@Naios `_. + +* Improved compatibility with Windows Store apps + (`#280 `_, + `#285 `_) + Thanks to `@mwinterb `_. + +* Added tests of compatibility with older C++ standards + (`#273 `_). + Thanks to `@niosHD `_. + +* Fixed Android build (`#271 `_). + Thanks to `@newnon `_. + +* Changed ``ArgMap`` to be backed by a vector instead of a map. + (`#261 `_, + `#262 `_). + Thanks to `@mwinterb `_. + +* Added ``fprintf`` overload that writes to a ``std::ostream`` + (`#251 `_). + Thanks to `nickhutchinson (Nicholas Hutchinson) `_. + +* Export symbols when building a Windows DLL + (`#245 `_). + Thanks to `macdems (Maciek Dems) `_. + +* Fixed compilation on Cygwin (`#304 `_). + +* Implemented a workaround for a bug in Apple LLVM version 4.2 of clang + (`#276 `_). + +* Implemented a workaround for Google Test bug + `#705 `_ on gcc 6 + (`#268 `_). + Thanks to `octoploid `_. + +* Removed Biicode support because the latter has been discontinued. + +2.1.1 - 2016-04-11 +------------------ + +* The install location for generated CMake files is now configurable via + the ``FMT_CMAKE_DIR`` CMake variable + (`#299 `_). + Thanks to `@niosHD `_. + +* Documentation fixes (`#252 `_). + +2.1.0 - 2016-03-21 +------------------ + +* Project layout and build system improvements + (`#267 `_): + + * The code have been moved to the ``cppformat`` directory. + Including ``format.h`` from the top-level directory is deprecated + but works via a proxy header which will be removed in the next + major version. + + * C++ Format CMake targets now have proper interface definitions. + + * Installed version of the library now supports the header-only + configuration. + + * Targets ``doc``, ``install``, and ``test`` are now disabled if C++ Format + is included as a CMake subproject. They can be enabled by setting + ``FMT_DOC``, ``FMT_INSTALL``, and ``FMT_TEST`` in the parent project. + + Thanks to `@niosHD `_. + +2.0.1 - 2016-03-13 +------------------ + +* Improved CMake find and package support + (`#264 `_). + Thanks to `@niosHD `_. + +* Fix compile error with Android NDK and mingw32 + (`#241 `_). + Thanks to `@Gachapen (Magnus Bjerke Vik) `_. + +* Documentation fixes + (`#248 `_, + `#260 `_). + +2.0.0 - 2015-12-01 +------------------ + +General +~~~~~~~ + +* [Breaking] Named arguments + (`#169 `_, + `#173 `_, + `#174 `_): + + .. code:: c++ + + fmt::print("The answer is {answer}.", fmt::arg("answer", 42)); + + Thanks to `@jamboree `_. + +* [Experimental] User-defined literals for format and named arguments + (`#204 `_, + `#206 `_, + `#207 `_): + + .. code:: c++ + + using namespace fmt::literals; + fmt::print("The answer is {answer}.", "answer"_a=42); + + Thanks to `@dean0x7d (Dean Moldovan) `_. + +* [Breaking] Formatting of more than 16 arguments is now supported when using + variadic templates + (`#141 `_). + Thanks to `@Shauren `_. + +* Runtime width specification + (`#168 `_): + + .. code:: c++ + + fmt::format("{0:{1}}", 42, 5); // gives " 42" + + Thanks to `@jamboree `_. + +* [Breaking] Enums are now formatted with an overloaded ``std::ostream`` insertion + operator (``operator<<``) if available + (`#232 `_). + +* [Breaking] Changed default ``bool`` format to textual, "true" or "false" + (`#170 `_): + + .. code:: c++ + + fmt::print("{}", true); // prints "true" + + To print ``bool`` as a number use numeric format specifier such as ``d``: + + .. code:: c++ + + fmt::print("{:d}", true); // prints "1" + +* ``fmt::printf`` and ``fmt::sprintf`` now support formatting of ``bool`` with the + ``%s`` specifier giving textual output, "true" or "false" + (`#223 `_): + + .. code:: c++ + + fmt::printf("%s", true); // prints "true" + + Thanks to `@LarsGullik `_. + +* [Breaking] ``signed char`` and ``unsigned char`` are now formatted as integers by default + (`#217 `_). + +* [Breaking] Pointers to C strings can now be formatted with the ``p`` specifier + (`#223 `_): + + .. code:: c++ + + fmt::print("{:p}", "test"); // prints pointer value + + Thanks to `@LarsGullik `_. + +* [Breaking] ``fmt::printf`` and ``fmt::sprintf`` now print null pointers as ``(nil)`` + and null strings as ``(null)`` for consistency with glibc + (`#226 `_). + Thanks to `@LarsGullik `_. + +* [Breaking] ``fmt::(s)printf`` now supports formatting of objects of user-defined types + that provide an overloaded ``std::ostream`` insertion operator (``operator<<``) + (`#201 `_): + + .. code:: c++ + + fmt::printf("The date is %s", Date(2012, 12, 9)); + +* [Breaking] The ``Buffer`` template is now part of the public API and can be used + to implement custom memory buffers + (`#140 `_). + Thanks to `@polyvertex (Jean-Charles Lefebvre) `_. + +* [Breaking] Improved compatibility between ``BasicStringRef`` and + `std::experimental::basic_string_view + `_ + (`#100 `_, + `#159 `_, + `#183 `_): + + - Comparison operators now compare string content, not pointers + - ``BasicStringRef::c_str`` replaced by ``BasicStringRef::data`` + - ``BasicStringRef`` is no longer assumed to be null-terminated + + References to null-terminated strings are now represented by a new class, + ``BasicCStringRef``. + +* Dependency on pthreads introduced by Google Test is now optional + (`#185 `_). + +* New CMake options ``FMT_DOC``, ``FMT_INSTALL`` and ``FMT_TEST`` to control + generation of ``doc``, ``install`` and ``test`` targets respectively, on by default + (`#197 `_, + `#198 `_, + `#200 `_). + Thanks to `@maddinat0r (Alex Martin) `_. + +* ``noexcept`` is now used when compiling with MSVC2015 + (`#215 `_). + Thanks to `@dmkrepo (Dmitriy) `_. + +* Added an option to disable use of ``windows.h`` when ``FMT_USE_WINDOWS_H`` + is defined as 0 before including ``format.h`` + (`#171 `_). + Thanks to `@alfps (Alf P. Steinbach) `_. + +* [Breaking] ``windows.h`` is now included with ``NOMINMAX`` unless + ``FMT_WIN_MINMAX`` is defined. This is done to prevent breaking code using + ``std::min`` and ``std::max`` and only affects the header-only configuration + (`#152 `_, + `#153 `_, + `#154 `_). + Thanks to `@DevO2012 `_. + +* Improved support for custom character types + (`#171 `_). + Thanks to `@alfps (Alf P. Steinbach) `_. + +* Added an option to disable use of IOStreams when ``FMT_USE_IOSTREAMS`` + is defined as 0 before including ``format.h`` + (`#205 `_, + `#208 `_). + Thanks to `@JodiTheTigger `_. + +* Improved detection of ``isnan``, ``isinf`` and ``signbit``. + +Optimization +~~~~~~~~~~~~ + +* Made formatting of user-defined types more efficient with a custom stream buffer + (`#92 `_, + `#230 `_). + Thanks to `@NotImplemented `_. + +* Further improved performance of ``fmt::Writer`` on integer formatting + and fixed a minor regression. Now it is ~7% faster than ``karma::generate`` + on Karma's benchmark + (`#186 `_). + +* [Breaking] Reduced `compiled code size + `_ + (`#143 `_, + `#149 `_). + +Distribution +~~~~~~~~~~~~ + +* [Breaking] Headers are now installed in + ``${CMAKE_INSTALL_PREFIX}/include/cppformat`` + (`#178 `_). + Thanks to `@jackyf (Eugene V. Lyubimkin) `_. + +* [Breaking] Changed the library name from ``format`` to ``cppformat`` + for consistency with the project name and to avoid potential conflicts + (`#178 `_). + Thanks to `@jackyf (Eugene V. Lyubimkin) `_. + +* C++ Format is now available in `Debian `_ GNU/Linux + (`stretch `_, + `sid `_) and + derived distributions such as + `Ubuntu `_ 15.10 and later + (`#155 `_):: + + $ sudo apt-get install libcppformat1-dev + + Thanks to `@jackyf (Eugene V. Lyubimkin) `_. + +* `Packages for Fedora and RHEL `_ + are now available. Thanks to Dave Johansen. + +* C++ Format can now be installed via `Homebrew `_ on OS X + (`#157 `_):: + + $ brew install cppformat + + Thanks to `@ortho `_, Anatoliy Bulukin. + +Documentation +~~~~~~~~~~~~~ + +* Migrated from ReadTheDocs to GitHub Pages for better responsiveness + and reliability + (`#128 `_). + New documentation address is http://cppformat.github.io/. + + +* Added `Building the documentation + `_ + section to the documentation. + +* Documentation build script is now compatible with Python 3 and newer pip versions. + (`#189 `_, + `#209 `_). + Thanks to `@JodiTheTigger `_ and + `@xentec `_. + +* Documentation fixes and improvements + (`#36 `_, + `#75 `_, + `#125 `_, + `#160 `_, + `#161 `_, + `#162 `_, + `#165 `_, + `#210 `_). + Thanks to `@syohex (Syohei YOSHIDA) `_ and + bug reporters. + +* Fixed out-of-tree documentation build + (`#177 `_). + Thanks to `@jackyf (Eugene V. Lyubimkin) `_. + +Fixes +~~~~~ + +* Fixed ``initializer_list`` detection + (`#136 `_). + Thanks to `@Gachapen (Magnus Bjerke Vik) `_. + +* [Breaking] Fixed formatting of enums with numeric format specifiers in + ``fmt::(s)printf`` + (`#131 `_, + `#139 `_): + + .. code:: c++ + + enum { ANSWER = 42 }; + fmt::printf("%d", ANSWER); + + Thanks to `@Naios `_. + +* Improved compatibility with old versions of MinGW + (`#129 `_, + `#130 `_, + `#132 `_). + Thanks to `@cstamford (Christopher Stamford) `_. + +* Fixed a compile error on MSVC with disabled exceptions + (`#144 `_). + +* Added a workaround for broken implementation of variadic templates in MSVC2012 + (`#148 `_). + +* Placed the anonymous namespace within ``fmt`` namespace for the header-only + configuration + (`#171 `_). + Thanks to `@alfps (Alf P. Steinbach) `_. + +* Fixed issues reported by Coverity Scan + (`#187 `_, + `#192 `_). + +* Implemented a workaround for a name lookup bug in MSVC2010 + (`#188 `_). + +* Fixed compiler warnings + (`#95 `_, + `#96 `_, + `#114 `_, + `#135 `_, + `#142 `_, + `#145 `_, + `#146 `_, + `#158 `_, + `#163 `_, + `#175 `_, + `#190 `_, + `#191 `_, + `#194 `_, + `#196 `_, + `#216 `_, + `#218 `_, + `#220 `_, + `#229 `_, + `#233 `_, + `#234 `_, + `#236 `_, + `#281 `_, + `#289 `_). + Thanks to `@seanmiddleditch (Sean Middleditch) `_, + `@dixlorenz (Dix Lorenz) `_, + `@CarterLi (李通洲) `_, + `@Naios `_, + `@fmatthew5876 (Matthew Fioravante) `_, + `@LevskiWeng (Levski Weng) `_, + `@rpopescu `_, + `@gabime (Gabi Melman) `_, + `@cubicool (Jeremy Moles) `_, + `@jkflying (Julian Kent) `_, + `@LogicalKnight (Sean L) `_, + `@inguin (Ingo van Lil) `_ and + `@Jopie64 (Johan) `_. + +* Fixed portability issues (mostly causing test failures) on ARM, ppc64, ppc64le, + s390x and SunOS 5.11 i386 + (`#138 `_, + `#179 `_, + `#180 `_, + `#202 `_, + `#225 `_, + `Red Hat Bugzilla Bug 1260297 `_). + Thanks to `@Naios `_, + `@jackyf (Eugene V. Lyubimkin) `_ and Dave Johansen. + +* Fixed a name conflict with macro ``free`` defined in + ``crtdbg.h`` when ``_CRTDBG_MAP_ALLOC`` is set + (`#211 `_). + +* Fixed shared library build on OS X + (`#212 `_). + Thanks to `@dean0x7d (Dean Moldovan) `_. + +* Fixed an overload conflict on MSVC when ``/Zc:wchar_t-`` option is specified + (`#214 `_). + Thanks to `@slavanap (Vyacheslav Napadovsky) `_. + +* Improved compatibility with MSVC 2008 + (`#236 `_). + Thanks to `@Jopie64 (Johan) `_. + +* Improved compatibility with bcc32 + (`#227 `_). + +* Fixed ``static_assert`` detection on Clang + (`#228 `_). + Thanks to `@dean0x7d (Dean Moldovan) `_. + +1.1.0 - 2015-03-06 +------------------ + +* Added ``BasicArrayWriter``, a class template that provides operations for + formatting and writing data into a fixed-size array + (`#105 `_ and + `#122 `_): + + .. code:: c++ + + char buffer[100]; + fmt::ArrayWriter w(buffer); + w.write("The answer is {}", 42); + +* Added `0 A.D. `_ and `PenUltima Online (POL) + `_ to the list of notable projects using C++ Format. + +* C++ Format now uses MSVC intrinsics for better formatting performance + (`#115 `_, + `#116 `_, + `#118 `_ and + `#121 `_). + Previously these optimizations where only used on GCC and Clang. + Thanks to `@CarterLi `_ and + `@objectx `_. + +* CMake install target (`#119 `_). + Thanks to `@TrentHouliston `_. + + You can now install C++ Format with ``make install`` command. + +* Improved `Biicode `_ support + (`#98 `_ and + `#104 `_). Thanks to + `@MariadeAnton `_ and + `@franramirez688 `_. + +* Improved support for building with `Android NDK + `_ + (`#107 `_). + Thanks to `@newnon `_. + + The `android-ndk-example `_ + repository provides and example of using C++ Format with Android NDK: + + .. image:: https://raw.githubusercontent.com/fmtlib/android-ndk-example/ + master/screenshot.png + +* Improved documentation of ``SystemError`` and ``WindowsError`` + (`#54 `_). + +* Various code improvements + (`#110 `_, + `#111 `_ + `#112 `_). + Thanks to `@CarterLi `_. + +* Improved compile-time errors when formatting wide into narrow strings + (`#117 `_). + +* Fixed ``BasicWriter::write`` without formatting arguments when C++11 support + is disabled (`#109 `_). + +* Fixed header-only build on OS X with GCC 4.9 + (`#124 `_). + +* Fixed packaging issues (`#94 `_). + +* Added `changelog `_ + (`#103 `_). + +1.0.0 - 2015-02-05 +------------------ + +* Add support for a header-only configuration when ``FMT_HEADER_ONLY`` is + defined before including ``format.h``: + + .. code:: c++ + + #define FMT_HEADER_ONLY + #include "format.h" + +* Compute string length in the constructor of ``BasicStringRef`` + instead of the ``size`` method + (`#79 `_). + This eliminates size computation for string literals on reasonable optimizing + compilers. + +* Fix formatting of types with overloaded ``operator <<`` for ``std::wostream`` + (`#86 `_): + + .. code:: c++ + + fmt::format(L"The date is {0}", Date(2012, 12, 9)); + +* Fix linkage of tests on Arch Linux + (`#89 `_). + +* Allow precision specifier for non-float arguments + (`#90 `_): + + .. code:: c++ + + fmt::print("{:.3}\n", "Carpet"); // prints "Car" + +* Fix build on Android NDK + (`#93 `_) + +* Improvements to documentation build procedure. + +* Remove ``FMT_SHARED`` CMake variable in favor of standard `BUILD_SHARED_LIBS + `_. + +* Fix error handling in ``fmt::fprintf``. + +* Fix a number of warnings. + +0.12.0 - 2014-10-25 +------------------- + +* [Breaking] Improved separation between formatting and buffer management. + ``Writer`` is now a base class that cannot be instantiated directly. + The new ``MemoryWriter`` class implements the default buffer management + with small allocations done on stack. So ``fmt::Writer`` should be replaced + with ``fmt::MemoryWriter`` in variable declarations. + + Old code: + + .. code:: c++ + + fmt::Writer w; + + New code: + + .. code:: c++ + + fmt::MemoryWriter w; + + If you pass ``fmt::Writer`` by reference, you can continue to do so: + + .. code:: c++ + + void f(fmt::Writer &w); + + This doesn't affect the formatting API. + +* Support for custom memory allocators + (`#69 `_) + +* Formatting functions now accept `signed char` and `unsigned char` strings as + arguments (`#73 `_): + + .. code:: c++ + + auto s = format("GLSL version: {}", glGetString(GL_VERSION)); + +* Reduced code bloat. According to the new `benchmark results + `_, + cppformat is close to ``printf`` and by the order of magnitude better than + Boost Format in terms of compiled code size. + +* Improved appearance of the documentation on mobile by using the `Sphinx + Bootstrap theme `_: + + .. |old| image:: https://cloud.githubusercontent.com/assets/576385/4792130/ + cd256436-5de3-11e4-9a62-c077d0c2b003.png + + .. |new| image:: https://cloud.githubusercontent.com/assets/576385/4792131/ + cd29896c-5de3-11e4-8f59-cac952942bf0.png + + +-------+-------+ + | Old | New | + +-------+-------+ + | |old| | |new| | + +-------+-------+ + +0.11.0 - 2014-08-21 +------------------- + +* Safe printf implementation with a POSIX extension for positional arguments: + + .. code:: c++ + + fmt::printf("Elapsed time: %.2f seconds", 1.23); + fmt::printf("%1$s, %3$d %2$s", weekday, month, day); + +* Arguments of ``char`` type can now be formatted as integers + (Issue `#55 `_): + + .. code:: c++ + + fmt::format("0x{0:02X}", 'a'); + +* Deprecated parts of the API removed. + +* The library is now built and tested on MinGW with Appveyor in addition to + existing test platforms Linux/GCC, OS X/Clang, Windows/MSVC. + +0.10.0 - 2014-07-01 +------------------- + +**Improved API** + +* All formatting methods are now implemented as variadic functions instead + of using ``operator<<`` for feeding arbitrary arguments into a temporary + formatter object. This works both with C++11 where variadic templates are + used and with older standards where variadic functions are emulated by + providing lightweight wrapper functions defined with the ``FMT_VARIADIC`` + macro. You can use this macro for defining your own portable variadic + functions: + + .. code:: c++ + + void report_error(const char *format, const fmt::ArgList &args) { + fmt::print("Error: {}"); + fmt::print(format, args); + } + FMT_VARIADIC(void, report_error, const char *) + + report_error("file not found: {}", path); + + Apart from a more natural syntax, this also improves performance as there + is no need to construct temporary formatter objects and control arguments' + lifetimes. Because the wrapper functions are very lightweight, this doesn't + cause code bloat even in pre-C++11 mode. + +* Simplified common case of formatting an ``std::string``. Now it requires a + single function call: + + .. code:: c++ + + std::string s = format("The answer is {}.", 42); + + Previously it required 2 function calls: + + .. code:: c++ + + std::string s = str(Format("The answer is {}.") << 42); + + Instead of unsafe ``c_str`` function, ``fmt::Writer`` should be used directly + to bypass creation of ``std::string``: + + .. code:: c++ + + fmt::Writer w; + w.write("The answer is {}.", 42); + w.c_str(); // returns a C string + + This doesn't do dynamic memory allocation for small strings and is less error + prone as the lifetime of the string is the same as for ``std::string::c_str`` + which is well understood (hopefully). + +* Improved consistency in naming functions that are a part of the public API. + Now all public functions are lowercase following the standard library + conventions. Previously it was a combination of lowercase and + CapitalizedWords. + Issue `#50 `_. + +* Old functions are marked as deprecated and will be removed in the next + release. + +**Other Changes** + +* Experimental support for printf format specifications (work in progress): + + .. code:: c++ + + fmt::printf("The answer is %d.", 42); + std::string s = fmt::sprintf("Look, a %s!", "string"); + +* Support for hexadecimal floating point format specifiers ``a`` and ``A``: + + .. code:: c++ + + print("{:a}", -42.0); // Prints -0x1.5p+5 + print("{:A}", -42.0); // Prints -0X1.5P+5 + +* CMake option ``FMT_SHARED`` that specifies whether to build format as a + shared library (off by default). + +0.9.0 - 2014-05-13 +------------------ + +* More efficient implementation of variadic formatting functions. + +* ``Writer::Format`` now has a variadic overload: + + .. code:: c++ + + Writer out; + out.Format("Look, I'm {}!", "variadic"); + +* For efficiency and consistency with other overloads, variadic overload of + the ``Format`` function now returns ``Writer`` instead of ``std::string``. + Use the ``str`` function to convert it to ``std::string``: + + .. code:: c++ + + std::string s = str(Format("Look, I'm {}!", "variadic")); + +* Replaced formatter actions with output sinks: ``NoAction`` -> ``NullSink``, + ``Write`` -> ``FileSink``, ``ColorWriter`` -> ``ANSITerminalSink``. + This improves naming consistency and shouldn't affect client code unless + these classes are used directly which should be rarely needed. + +* Added ``ThrowSystemError`` function that formats a message and throws + ``SystemError`` containing the formatted message and system-specific error + description. For example, the following code + + .. code:: c++ + + FILE *f = fopen(filename, "r"); + if (!f) + ThrowSystemError(errno, "Failed to open file '{}'") << filename; + + will throw ``SystemError`` exception with description + "Failed to open file '': No such file or directory" if file + doesn't exist. + +* Support for AppVeyor continuous integration platform. + +* ``Format`` now throws ``SystemError`` in case of I/O errors. + +* Improve test infrastructure. Print functions are now tested by redirecting + the output to a pipe. + +0.8.0 - 2014-04-14 +------------------ + +* Initial release Index: libraries/source/fmt/LICENSE.rst =================================================================== --- /dev/null +++ libraries/source/fmt/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. Index: libraries/source/fmt/README.rst =================================================================== --- /dev/null +++ libraries/source/fmt/README.rst @@ -0,0 +1,501 @@ +{fmt} +===== + +.. image:: https://travis-ci.org/fmtlib/fmt.png?branch=master + :target: https://travis-ci.org/fmtlib/fmt + +.. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v + :target: https://ci.appveyor.com/project/vitaut/fmt + +.. image:: https://oss-fuzz-build-logs.storage.googleapis.com/badges/libfmt.svg + :alt: fmt is continuously fuzzed att oss-fuzz + :target: https://bugs.chromium.org/p/oss-fuzz/issues/list?colspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20Summary&q=proj%3Dlibfmt&can=1 + +.. image:: https://img.shields.io/badge/stackoverflow-fmt-blue.svg + :alt: Ask questions at StackOverflow with the tag fmt + :target: https://stackoverflow.com/questions/tagged/fmt + +**{fmt}** is an open-source formatting library for C++. +It can be used as a safe and fast alternative to (s)printf and iostreams. + +`Documentation `__ + +Q&A: ask questions on `StackOverflow with the tag fmt `_. + +Features +-------- + +* Replacement-based `format API `_ with + positional arguments for localization. +* `Format string syntax `_ similar to the one + of `str.format `_ + in Python. +* Safe `printf implementation + `_ including + the POSIX extension for positional arguments. +* Implementation of `C++20 std::format `__. +* Support for user-defined types. +* High performance: faster than common standard library implementations of + `printf `_ and + iostreams. See `Speed tests`_ and `Fast integer to string conversion in C++ + `_. +* Small code size both in terms of source code (the minimum configuration + consists of just three header files, ``core.h``, ``format.h`` and + ``format-inl.h``) and compiled code. See `Compile time and code bloat`_. +* Reliability: the library has an extensive set of `unit tests + `_ and is continuously fuzzed. +* Safety: the library is fully type safe, errors in format strings can be + reported at compile time, automatic memory management prevents buffer overflow + errors. +* Ease of use: small self-contained code base, no external dependencies, + permissive MIT `license + `_ +* `Portability `_ with + consistent output across platforms and support for older compilers. +* Clean warning-free codebase even on high warning levels + (``-Wall -Wextra -pedantic``). +* Support for wide strings. +* Optional header-only configuration enabled with the ``FMT_HEADER_ONLY`` macro. + +See the `documentation `_ for more details. + +Examples +-------- + +Print ``Hello, world!`` to ``stdout``: + +.. code:: c++ + + fmt::print("Hello, {}!", "world"); // Python-like format string syntax + fmt::printf("Hello, %s!", "world"); // printf format string syntax + +Format a string and use positional arguments: + +.. code:: c++ + + std::string s = fmt::format("I'd rather be {1} than {0}.", "right", "happy"); + // s == "I'd rather be happy than right." + +Check a format string at compile time: + +.. code:: c++ + + // test.cc + #include + std::string s = format(FMT_STRING("{2}"), 42); + +.. code:: + + $ c++ -Iinclude -std=c++14 test.cc + ... + test.cc:4:17: note: in instantiation of function template specialization 'fmt::v5::format' requested here + std::string s = format(FMT_STRING("{2}"), 42); + ^ + include/fmt/core.h:778:19: note: non-constexpr function 'on_error' cannot be used in a constant expression + ErrorHandler::on_error(message); + ^ + include/fmt/format.h:2226:16: note: in call to '&checker.context_->on_error(&"argument index out of range"[0])' + context_.on_error("argument index out of range"); + ^ + +Use {fmt} as a safe portable replacement for ``itoa`` +(`godbolt `_): + +.. code:: c++ + + fmt::memory_buffer buf; + format_to(buf, "{}", 42); // replaces itoa(42, buffer, 10) + format_to(buf, "{:x}", 42); // replaces itoa(42, buffer, 16) + // access the string with to_string(buf) or buf.data() + +Format objects of user-defined types via a simple `extension API +`_: + +.. code:: c++ + + #include "fmt/format.h" + + struct date { + int year, month, day; + }; + + template <> + struct fmt::formatter { + constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); } + + template + auto format(const date& d, FormatContext& ctx) { + return format_to(ctx.out(), "{}-{}-{}", d.year, d.month, d.day); + } + }; + + std::string s = fmt::format("The date is {}", date{2012, 12, 9}); + // s == "The date is 2012-12-9" + +Create your own functions similar to `format +`_ and +`print `_ +which take arbitrary arguments (`godbolt `_): + +.. code:: c++ + + // Prints formatted error message. + void vreport_error(const char* format, fmt::format_args args) { + fmt::print("Error: "); + fmt::vprint(format, args); + } + template + void report_error(const char* format, const Args & ... args) { + vreport_error(format, fmt::make_format_args(args...)); + } + + report_error("file not found: {}", path); + +Note that ``vreport_error`` is not parameterized on argument types which can +improve compile times and reduce code size compared to a fully parameterized +version. + +Benchmarks +---------- + +Speed tests +~~~~~~~~~~~ + +================= ============= =========== +Library Method Run Time, s +================= ============= =========== +libc printf 1.04 +libc++ std::ostream 3.05 +{fmt} 6.1.1 fmt::print 0.75 +Boost Format 1.67 boost::format 7.24 +Folly Format folly::format 2.23 +================= ============= =========== + +{fmt} is the fastest of the benchmarked methods, ~35% faster than ``printf``. + +The above results were generated by building ``tinyformat_test.cpp`` on macOS +10.14.6 with ``clang++ -O3 -DSPEED_TEST -DHAVE_FORMAT``, and taking the best of +three runs. In the test, the format string ``"%0.10f:%04d:%+g:%s:%p:%c:%%\n"`` +or equivalent is filled 2,000,000 times with output sent to ``/dev/null``; for +further details refer to the `source +`_. + +{fmt} is 10x faster than ``std::ostringstream`` and ``sprintf`` on floating-point +formatting (`dtoa-benchmark `_) +and as fast as `double-conversion `_: + +.. image:: https://user-images.githubusercontent.com/576385/69767160-cdaca400-112f-11ea-9fc5-347c9f83caad.png + :target: https://fmt.dev/unknown_mac64_clang10.0.html + +Compile time and code bloat +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The script `bloat-test.py +`_ +from `format-benchmark `_ +tests compile time and code bloat for nontrivial projects. +It generates 100 translation units and uses ``printf()`` or its alternative +five times in each to simulate a medium sized project. The resulting +executable size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42), +macOS Sierra, best of three) is shown in the following tables. + +**Optimized build (-O3)** + +============= =============== ==================== ================== +Method Compile Time, s Executable size, KiB Stripped size, KiB +============= =============== ==================== ================== +printf 2.6 29 26 +printf+string 16.4 29 26 +iostreams 31.1 59 55 +{fmt} 19.0 37 34 +Boost Format 91.9 226 203 +Folly Format 115.7 101 88 +============= =============== ==================== ================== + +As you can see, {fmt} has 60% less overhead in terms of resulting binary code +size compared to iostreams and comes pretty close to ``printf``. Boost Format +and Folly Format have the largest overheads. + +``printf+string`` is the same as ``printf`` but with extra ```` +include to measure the overhead of the latter. + +**Non-optimized build** + +============= =============== ==================== ================== +Method Compile Time, s Executable size, KiB Stripped size, KiB +============= =============== ==================== ================== +printf 2.2 33 30 +printf+string 16.0 33 30 +iostreams 28.3 56 52 +{fmt} 18.2 59 50 +Boost Format 54.1 365 303 +Folly Format 79.9 445 430 +============= =============== ==================== ================== + +``libc``, ``lib(std)c++`` and ``libfmt`` are all linked as shared libraries to +compare formatting function overhead only. Boost Format is a +header-only library so it doesn't provide any linkage options. + +Running the tests +~~~~~~~~~~~~~~~~~ + +Please refer to `Building the library`__ for the instructions on how to build +the library and run the unit tests. + +__ https://fmt.dev/latest/usage.html#building-the-library + +Benchmarks reside in a separate repository, +`format-benchmarks `_, +so to run the benchmarks you first need to clone this repository and +generate Makefiles with CMake:: + + $ git clone --recursive https://github.com/fmtlib/format-benchmark.git + $ cd format-benchmark + $ cmake . + +Then you can run the speed test:: + + $ make speed-test + +or the bloat test:: + + $ make bloat-test + +Projects using this library +--------------------------- + +* `0 A.D. `_: A free, open-source, cross-platform real-time + strategy game + +* `AMPL/MP `_: + An open-source library for mathematical programming + +* `AvioBook `_: A comprehensive aircraft + operations suite + +* `Celestia `_: Real-time 3D visualization of space + +* `Ceph `_: A scalable distributed storage system + +* `ccache `_: A compiler cache + +* `CUAUV `_: Cornell University's autonomous underwater + vehicle + +* `HarpyWar/pvpgn `_: + Player vs Player Gaming Network with tweaks + +* `KBEngine `_: An open-source MMOG server engine + +* `Keypirinha `_: A semantic launcher for Windows + +* `Kodi `_ (formerly xbmc): Home theater software + +* `Lifeline `_: A 2D game + +* `Drake `_: A planning, control, and analysis toolbox + for nonlinear dynamical systems (MIT) + +* `Envoy `_: C++ L7 proxy and communication bus + (Lyft) + +* `FiveM `_: a modification framework for GTA V + +* `MongoDB `_: Distributed document database + +* `MongoDB Smasher `_: A small tool to + generate randomized datasets + +* `OpenSpace `_: An open-source astrovisualization + framework + +* `PenUltima Online (POL) `_: + An MMO server, compatible with most Ultima Online clients + +* `quasardb `_: A distributed, high-performance, + associative database + +* `readpe `_: Read Portable Executable + +* `redis-cerberus `_: A Redis cluster + proxy + +* `rpclib `_: A modern C++ msgpack-RPC server and client + library + +* `Saddy `_: + Small crossplatform 2D graphic engine + +* `Salesforce Analytics Cloud `_: + Business intelligence software + +* `Scylla `_: A Cassandra-compatible NoSQL data store + that can handle 1 million transactions per second on a single server + +* `Seastar `_: An advanced, open-source C++ + framework for high-performance server applications on modern hardware + +* `spdlog `_: Super fast C++ logging library + +* `Stellar `_: Financial platform + +* `Touch Surgery `_: Surgery simulator + +* `TrinityCore `_: Open-source + MMORPG framework + +`More... `_ + +If you are aware of other projects using this library, please let me know +by `email `_ or by submitting an +`issue `_. + +Motivation +---------- + +So why yet another formatting library? + +There are plenty of methods for doing this task, from standard ones like +the printf family of function and iostreams to Boost Format and FastFormat +libraries. The reason for creating a new library is that every existing +solution that I found either had serious issues or didn't provide +all the features I needed. + +printf +~~~~~~ + +The good thing about ``printf`` is that it is pretty fast and readily available +being a part of the C standard library. The main drawback is that it +doesn't support user-defined types. ``printf`` also has safety issues although +they are somewhat mitigated with `__attribute__ ((format (printf, ...)) +`_ in GCC. +There is a POSIX extension that adds positional arguments required for +`i18n `_ +to ``printf`` but it is not a part of C99 and may not be available on some +platforms. + +iostreams +~~~~~~~~~ + +The main issue with iostreams is best illustrated with an example: + +.. code:: c++ + + std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n"; + +which is a lot of typing compared to printf: + +.. code:: c++ + + printf("%.2f\n", 1.23456); + +Matthew Wilson, the author of FastFormat, called this "chevron hell". iostreams +don't support positional arguments by design. + +The good part is that iostreams support user-defined types and are safe although +error handling is awkward. + +Boost Format +~~~~~~~~~~~~ + +This is a very powerful library which supports both ``printf``-like format +strings and positional arguments. Its main drawback is performance. According to +various benchmarks it is much slower than other methods considered here. Boost +Format also has excessive build times and severe code bloat issues (see +`Benchmarks`_). + +FastFormat +~~~~~~~~~~ + +This is an interesting library which is fast, safe and has positional +arguments. However it has significant limitations, citing its author: + + Three features that have no hope of being accommodated within the + current design are: + + * Leading zeros (or any other non-space padding) + * Octal/hexadecimal encoding + * Runtime width/alignment specification + +It is also quite big and has a heavy dependency, STLSoft, which might be +too restrictive for using it in some projects. + +Boost Spirit.Karma +~~~~~~~~~~~~~~~~~~ + +This is not really a formatting library but I decided to include it here for +completeness. As iostreams, it suffers from the problem of mixing verbatim text +with arguments. The library is pretty fast, but slower on integer formatting +than ``fmt::format_int`` on Karma's own benchmark, +see `Fast integer to string conversion in C++ +`_. + +FAQ +--- + +Q: how can I capture formatting arguments and format them later? + +A: use ``std::tuple``: + +.. code:: c++ + + template + auto capture(const Args&... args) { + return std::make_tuple(args...); + } + + auto print_message = [](const auto&... args) { + fmt::print(args...); + }; + + // Capture and store arguments: + auto args = capture("{} {}", 42, "foo"); + // Do formatting: + std::apply(print_message, args); + +License +------- + +{fmt} is distributed under the MIT `license +`_. + +The `Format String Syntax +`_ +section in the documentation is based on the one from Python `string module +documentation `_ +adapted for the current library. For this reason the documentation is +distributed under the Python Software Foundation license available in +`doc/python-license.txt +`_. +It only applies if you distribute the documentation of fmt. + +Acknowledgments +--------------- + +The {fmt} library is maintained by Victor Zverovich (`vitaut +`_) and Jonathan Müller (`foonathan +`_) with contributions from many other people. +See `Contributors `_ and +`Releases `_ for some of the names. +Let us know if your contribution is not listed or mentioned incorrectly and +we'll make it right. + +The benchmark section of this readme file and the performance tests are taken +from the excellent `tinyformat `_ library +written by Chris Foster. Boost Format library is acknowledged transitively +since it had some influence on tinyformat. +Some ideas used in the implementation are borrowed from `Loki +`_ SafeFormat and `Diagnostic API +`_ in +`Clang `_. +Format string syntax and the documentation are based on Python's `str.format +`_. +Thanks `Doug Turnbull `_ for his valuable +comments and contribution to the design of the type-safe API and +`Gregory Czajkowski `_ for implementing binary +formatting. Thanks `Ruslan Baratov `_ for comprehensive +`comparison of integer formatting algorithms `_ +and useful comments regarding performance, `Boris Kaul `_ for +`C++ counting digits benchmark `_. +Thanks to `CarterLi `_ for contributing various +improvements to the code. Index: libraries/source/fmt/build.sh =================================================================== --- /dev/null +++ libraries/source/fmt/build.sh @@ -0,0 +1,23 @@ +#!/bin/sh + +set -e + +JOBS=${JOBS:="-j2"} +MAKE=${MAKE:="make"} + +echo "Building fmt..." +echo + +mkdir -p build/ +cd build/ + +cmake .. -DFMT_TEST=False -DFMT_DOC=False -DBUILD_SHARED_LIBS=TRUE + +${MAKE} fmt ${JOBS} + +cd ../ + +LIB_EXTN=so +LIB_PREFIX=lib + +cp -P build/${LIB_PREFIX}fmt.${LIB_EXTN}* ../../../binaries/system/ Index: libraries/source/fmt/include/fmt/chrono.h =================================================================== --- /dev/null +++ libraries/source/fmt/include/fmt/chrono.h @@ -0,0 +1,1119 @@ +// Formatting library for C++ - chrono support +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CHRONO_H_ +#define FMT_CHRONO_H_ + +#include +#include +#include +#include + +#include "format.h" +#include "locale.h" + +FMT_BEGIN_NAMESPACE + +// Enable safe chrono durations, unless explicitly disabled. +#ifndef FMT_SAFE_DURATION_CAST +# define FMT_SAFE_DURATION_CAST 1 +#endif +#if FMT_SAFE_DURATION_CAST + +// For conversion between std::chrono::durations without undefined +// behaviour or erroneous results. +// This is a stripped down version of duration_cast, for inclusion in fmt. +// See https://github.com/pauldreik/safe_duration_cast +// +// Copyright Paul Dreik 2019 +namespace safe_duration_cast { + +template ::value && + std::numeric_limits::is_signed == + std::numeric_limits::is_signed)> +FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) { + ec = 0; + using F = std::numeric_limits; + using T = std::numeric_limits; + static_assert(F::is_integer, "From must be integral"); + static_assert(T::is_integer, "To must be integral"); + + // A and B are both signed, or both unsigned. + if (F::digits <= T::digits) { + // From fits in To without any problem. + } else { + // From does not always fit in To, resort to a dynamic check. + if (from < T::min() || from > T::max()) { + // outside range. + ec = 1; + return {}; + } + } + return static_cast(from); +} + +/** + * converts From to To, without loss. If the dynamic value of from + * can't be converted to To without loss, ec is set. + */ +template ::value && + std::numeric_limits::is_signed != + std::numeric_limits::is_signed)> +FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) { + ec = 0; + using F = std::numeric_limits; + using T = std::numeric_limits; + static_assert(F::is_integer, "From must be integral"); + static_assert(T::is_integer, "To must be integral"); + + if (F::is_signed && !T::is_signed) { + // From may be negative, not allowed! + if (fmt::internal::is_negative(from)) { + ec = 1; + return {}; + } + + // From is positive. Can it always fit in To? + if (F::digits <= T::digits) { + // yes, From always fits in To. + } else { + // from may not fit in To, we have to do a dynamic check + if (from > static_cast(T::max())) { + ec = 1; + return {}; + } + } + } + + if (!F::is_signed && T::is_signed) { + // can from be held in To? + if (F::digits < T::digits) { + // yes, From always fits in To. + } else { + // from may not fit in To, we have to do a dynamic check + if (from > static_cast(T::max())) { + // outside range. + ec = 1; + return {}; + } + } + } + + // reaching here means all is ok for lossless conversion. + return static_cast(from); + +} // function + +template ::value)> +FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) { + ec = 0; + return from; +} // function + +// clang-format off +/** + * converts From to To if possible, otherwise ec is set. + * + * input | output + * ---------------------------------|--------------- + * NaN | NaN + * Inf | Inf + * normal, fits in output | converted (possibly lossy) + * normal, does not fit in output | ec is set + * subnormal | best effort + * -Inf | -Inf + */ +// clang-format on +template ::value)> +FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) { + ec = 0; + using T = std::numeric_limits; + static_assert(std::is_floating_point::value, "From must be floating"); + static_assert(std::is_floating_point::value, "To must be floating"); + + // catch the only happy case + if (std::isfinite(from)) { + if (from >= T::lowest() && from <= T::max()) { + return static_cast(from); + } + // not within range. + ec = 1; + return {}; + } + + // nan and inf will be preserved + return static_cast(from); +} // function + +template ::value)> +FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) { + ec = 0; + static_assert(std::is_floating_point::value, "From must be floating"); + return from; +} + +/** + * safe duration cast between integral durations + */ +template ::value), + FMT_ENABLE_IF(std::is_integral::value)> +To safe_duration_cast(std::chrono::duration from, + int& ec) { + using From = std::chrono::duration; + ec = 0; + // the basic idea is that we need to convert from count() in the from type + // to count() in the To type, by multiplying it with this: + struct Factor + : std::ratio_divide {}; + + static_assert(Factor::num > 0, "num must be positive"); + static_assert(Factor::den > 0, "den must be positive"); + + // the conversion is like this: multiply from.count() with Factor::num + // /Factor::den and convert it to To::rep, all this without + // overflow/underflow. let's start by finding a suitable type that can hold + // both To, From and Factor::num + using IntermediateRep = + typename std::common_type::type; + + // safe conversion to IntermediateRep + IntermediateRep count = + lossless_integral_conversion(from.count(), ec); + if (ec) { + return {}; + } + // multiply with Factor::num without overflow or underflow + if (Factor::num != 1) { + const auto max1 = internal::max_value() / Factor::num; + if (count > max1) { + ec = 1; + return {}; + } + const auto min1 = std::numeric_limits::min() / Factor::num; + if (count < min1) { + ec = 1; + return {}; + } + count *= Factor::num; + } + + // this can't go wrong, right? den>0 is checked earlier. + if (Factor::den != 1) { + count /= Factor::den; + } + // convert to the to type, safely + using ToRep = typename To::rep; + const ToRep tocount = lossless_integral_conversion(count, ec); + if (ec) { + return {}; + } + return To{tocount}; +} + +/** + * safe duration_cast between floating point durations + */ +template ::value), + FMT_ENABLE_IF(std::is_floating_point::value)> +To safe_duration_cast(std::chrono::duration from, + int& ec) { + using From = std::chrono::duration; + ec = 0; + if (std::isnan(from.count())) { + // nan in, gives nan out. easy. + return To{std::numeric_limits::quiet_NaN()}; + } + // maybe we should also check if from is denormal, and decide what to do about + // it. + + // +-inf should be preserved. + if (std::isinf(from.count())) { + return To{from.count()}; + } + + // the basic idea is that we need to convert from count() in the from type + // to count() in the To type, by multiplying it with this: + struct Factor + : std::ratio_divide {}; + + static_assert(Factor::num > 0, "num must be positive"); + static_assert(Factor::den > 0, "den must be positive"); + + // the conversion is like this: multiply from.count() with Factor::num + // /Factor::den and convert it to To::rep, all this without + // overflow/underflow. let's start by finding a suitable type that can hold + // both To, From and Factor::num + using IntermediateRep = + typename std::common_type::type; + + // force conversion of From::rep -> IntermediateRep to be safe, + // even if it will never happen be narrowing in this context. + IntermediateRep count = + safe_float_conversion(from.count(), ec); + if (ec) { + return {}; + } + + // multiply with Factor::num without overflow or underflow + if (Factor::num != 1) { + constexpr auto max1 = internal::max_value() / + static_cast(Factor::num); + if (count > max1) { + ec = 1; + return {}; + } + constexpr auto min1 = std::numeric_limits::lowest() / + static_cast(Factor::num); + if (count < min1) { + ec = 1; + return {}; + } + count *= static_cast(Factor::num); + } + + // this can't go wrong, right? den>0 is checked earlier. + if (Factor::den != 1) { + using common_t = typename std::common_type::type; + count /= static_cast(Factor::den); + } + + // convert to the to type, safely + using ToRep = typename To::rep; + + const ToRep tocount = safe_float_conversion(count, ec); + if (ec) { + return {}; + } + return To{tocount}; +} +} // namespace safe_duration_cast +#endif + +// Prevents expansion of a preceding token as a function-style macro. +// Usage: f FMT_NOMACRO() +#define FMT_NOMACRO + +namespace internal { +inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); } +inline null<> localtime_s(...) { return null<>(); } +inline null<> gmtime_r(...) { return null<>(); } +inline null<> gmtime_s(...) { return null<>(); } +} // namespace internal + +// Thread-safe replacement for std::localtime +inline std::tm localtime(std::time_t time) { + struct dispatcher { + std::time_t time_; + std::tm tm_; + + dispatcher(std::time_t t) : time_(t) {} + + bool run() { + using namespace fmt::internal; + return handle(localtime_r(&time_, &tm_)); + } + + bool handle(std::tm* tm) { return tm != nullptr; } + + bool handle(internal::null<>) { + using namespace fmt::internal; + return fallback(localtime_s(&tm_, &time_)); + } + + bool fallback(int res) { return res == 0; } + +#if !FMT_MSC_VER + bool fallback(internal::null<>) { + using namespace fmt::internal; + std::tm* tm = std::localtime(&time_); + if (tm) tm_ = *tm; + return tm != nullptr; + } +#endif + }; + dispatcher lt(time); + // Too big time values may be unsupported. + if (!lt.run()) FMT_THROW(format_error("time_t value out of range")); + return lt.tm_; +} + +// Thread-safe replacement for std::gmtime +inline std::tm gmtime(std::time_t time) { + struct dispatcher { + std::time_t time_; + std::tm tm_; + + dispatcher(std::time_t t) : time_(t) {} + + bool run() { + using namespace fmt::internal; + return handle(gmtime_r(&time_, &tm_)); + } + + bool handle(std::tm* tm) { return tm != nullptr; } + + bool handle(internal::null<>) { + using namespace fmt::internal; + return fallback(gmtime_s(&tm_, &time_)); + } + + bool fallback(int res) { return res == 0; } + +#if !FMT_MSC_VER + bool fallback(internal::null<>) { + std::tm* tm = std::gmtime(&time_); + if (tm) tm_ = *tm; + return tm != nullptr; + } +#endif + }; + dispatcher gt(time); + // Too big time values may be unsupported. + if (!gt.run()) FMT_THROW(format_error("time_t value out of range")); + return gt.tm_; +} + +namespace internal { +inline std::size_t strftime(char* str, std::size_t count, const char* format, + const std::tm* time) { + return std::strftime(str, count, format, time); +} + +inline std::size_t strftime(wchar_t* str, std::size_t count, + const wchar_t* format, const std::tm* time) { + return std::wcsftime(str, count, format, time); +} +} // namespace internal + +template struct formatter { + template + auto parse(ParseContext& ctx) -> decltype(ctx.begin()) { + auto it = ctx.begin(); + if (it != ctx.end() && *it == ':') ++it; + auto end = it; + while (end != ctx.end() && *end != '}') ++end; + tm_format.reserve(internal::to_unsigned(end - it + 1)); + tm_format.append(it, end); + tm_format.push_back('\0'); + return end; + } + + template + auto format(const std::tm& tm, FormatContext& ctx) -> decltype(ctx.out()) { + basic_memory_buffer buf; + std::size_t start = buf.size(); + for (;;) { + std::size_t size = buf.capacity() - start; + std::size_t count = + internal::strftime(&buf[start], size, &tm_format[0], &tm); + if (count != 0) { + buf.resize(start + count); + break; + } + if (size >= tm_format.size() * 256) { + // If the buffer is 256 times larger than the format string, assume + // that `strftime` gives an empty result. There doesn't seem to be a + // better way to distinguish the two cases: + // https://github.com/fmtlib/fmt/issues/367 + break; + } + const std::size_t MIN_GROWTH = 10; + buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH)); + } + return std::copy(buf.begin(), buf.end(), ctx.out()); + } + + basic_memory_buffer tm_format; +}; + +namespace internal { +template FMT_CONSTEXPR const char* get_units() { + return nullptr; +} +template <> FMT_CONSTEXPR const char* get_units() { return "as"; } +template <> FMT_CONSTEXPR const char* get_units() { return "fs"; } +template <> FMT_CONSTEXPR const char* get_units() { return "ps"; } +template <> FMT_CONSTEXPR const char* get_units() { return "ns"; } +template <> FMT_CONSTEXPR const char* get_units() { return "µs"; } +template <> FMT_CONSTEXPR const char* get_units() { return "ms"; } +template <> FMT_CONSTEXPR const char* get_units() { return "cs"; } +template <> FMT_CONSTEXPR const char* get_units() { return "ds"; } +template <> FMT_CONSTEXPR const char* get_units>() { return "s"; } +template <> FMT_CONSTEXPR const char* get_units() { return "das"; } +template <> FMT_CONSTEXPR const char* get_units() { return "hs"; } +template <> FMT_CONSTEXPR const char* get_units() { return "ks"; } +template <> FMT_CONSTEXPR const char* get_units() { return "Ms"; } +template <> FMT_CONSTEXPR const char* get_units() { return "Gs"; } +template <> FMT_CONSTEXPR const char* get_units() { return "Ts"; } +template <> FMT_CONSTEXPR const char* get_units() { return "Ps"; } +template <> FMT_CONSTEXPR const char* get_units() { return "Es"; } +template <> FMT_CONSTEXPR const char* get_units>() { + return "m"; +} +template <> FMT_CONSTEXPR const char* get_units>() { + return "h"; +} + +enum class numeric_system { + standard, + // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale. + alternative +}; + +// Parses a put_time-like format string and invokes handler actions. +template +FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin, + const Char* end, + Handler&& handler) { + auto ptr = begin; + while (ptr != end) { + auto c = *ptr; + if (c == '}') break; + if (c != '%') { + ++ptr; + continue; + } + if (begin != ptr) handler.on_text(begin, ptr); + ++ptr; // consume '%' + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr++; + switch (c) { + case '%': + handler.on_text(ptr - 1, ptr); + break; + case 'n': { + const Char newline[] = {'\n'}; + handler.on_text(newline, newline + 1); + break; + } + case 't': { + const Char tab[] = {'\t'}; + handler.on_text(tab, tab + 1); + break; + } + // Day of the week: + case 'a': + handler.on_abbr_weekday(); + break; + case 'A': + handler.on_full_weekday(); + break; + case 'w': + handler.on_dec0_weekday(numeric_system::standard); + break; + case 'u': + handler.on_dec1_weekday(numeric_system::standard); + break; + // Month: + case 'b': + handler.on_abbr_month(); + break; + case 'B': + handler.on_full_month(); + break; + // Hour, minute, second: + case 'H': + handler.on_24_hour(numeric_system::standard); + break; + case 'I': + handler.on_12_hour(numeric_system::standard); + break; + case 'M': + handler.on_minute(numeric_system::standard); + break; + case 'S': + handler.on_second(numeric_system::standard); + break; + // Other: + case 'c': + handler.on_datetime(numeric_system::standard); + break; + case 'x': + handler.on_loc_date(numeric_system::standard); + break; + case 'X': + handler.on_loc_time(numeric_system::standard); + break; + case 'D': + handler.on_us_date(); + break; + case 'F': + handler.on_iso_date(); + break; + case 'r': + handler.on_12_hour_time(); + break; + case 'R': + handler.on_24_hour_time(); + break; + case 'T': + handler.on_iso_time(); + break; + case 'p': + handler.on_am_pm(); + break; + case 'Q': + handler.on_duration_value(); + break; + case 'q': + handler.on_duration_unit(); + break; + case 'z': + handler.on_utc_offset(); + break; + case 'Z': + handler.on_tz_name(); + break; + // Alternative representation: + case 'E': { + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr++; + switch (c) { + case 'c': + handler.on_datetime(numeric_system::alternative); + break; + case 'x': + handler.on_loc_date(numeric_system::alternative); + break; + case 'X': + handler.on_loc_time(numeric_system::alternative); + break; + default: + FMT_THROW(format_error("invalid format")); + } + break; + } + case 'O': + if (ptr == end) FMT_THROW(format_error("invalid format")); + c = *ptr++; + switch (c) { + case 'w': + handler.on_dec0_weekday(numeric_system::alternative); + break; + case 'u': + handler.on_dec1_weekday(numeric_system::alternative); + break; + case 'H': + handler.on_24_hour(numeric_system::alternative); + break; + case 'I': + handler.on_12_hour(numeric_system::alternative); + break; + case 'M': + handler.on_minute(numeric_system::alternative); + break; + case 'S': + handler.on_second(numeric_system::alternative); + break; + default: + FMT_THROW(format_error("invalid format")); + } + break; + default: + FMT_THROW(format_error("invalid format")); + } + begin = ptr; + } + if (begin != ptr) handler.on_text(begin, ptr); + return ptr; +} + +struct chrono_format_checker { + FMT_NORETURN void report_no_date() { FMT_THROW(format_error("no date")); } + + template void on_text(const Char*, const Char*) {} + FMT_NORETURN void on_abbr_weekday() { report_no_date(); } + FMT_NORETURN void on_full_weekday() { report_no_date(); } + FMT_NORETURN void on_dec0_weekday(numeric_system) { report_no_date(); } + FMT_NORETURN void on_dec1_weekday(numeric_system) { report_no_date(); } + FMT_NORETURN void on_abbr_month() { report_no_date(); } + FMT_NORETURN void on_full_month() { report_no_date(); } + void on_24_hour(numeric_system) {} + void on_12_hour(numeric_system) {} + void on_minute(numeric_system) {} + void on_second(numeric_system) {} + FMT_NORETURN void on_datetime(numeric_system) { report_no_date(); } + FMT_NORETURN void on_loc_date(numeric_system) { report_no_date(); } + FMT_NORETURN void on_loc_time(numeric_system) { report_no_date(); } + FMT_NORETURN void on_us_date() { report_no_date(); } + FMT_NORETURN void on_iso_date() { report_no_date(); } + void on_12_hour_time() {} + void on_24_hour_time() {} + void on_iso_time() {} + void on_am_pm() {} + void on_duration_value() {} + void on_duration_unit() {} + FMT_NORETURN void on_utc_offset() { report_no_date(); } + FMT_NORETURN void on_tz_name() { report_no_date(); } +}; + +template ::value)> +inline bool isnan(T) { + return false; +} +template ::value)> +inline bool isnan(T value) { + return std::isnan(value); +} + +template ::value)> +inline bool isfinite(T) { + return true; +} +template ::value)> +inline bool isfinite(T value) { + return std::isfinite(value); +} + +// Converts value to int and checks that it's in the range [0, upper). +template ::value)> +inline int to_nonnegative_int(T value, int upper) { + FMT_ASSERT(value >= 0 && value <= upper, "invalid value"); + (void)upper; + return static_cast(value); +} +template ::value)> +inline int to_nonnegative_int(T value, int upper) { + FMT_ASSERT( + std::isnan(value) || (value >= 0 && value <= static_cast(upper)), + "invalid value"); + (void)upper; + return static_cast(value); +} + +template ::value)> +inline T mod(T x, int y) { + return x % static_cast(y); +} +template ::value)> +inline T mod(T x, int y) { + return std::fmod(x, static_cast(y)); +} + +// If T is an integral type, maps T to its unsigned counterpart, otherwise +// leaves it unchanged (unlike std::make_unsigned). +template ::value> +struct make_unsigned_or_unchanged { + using type = T; +}; + +template struct make_unsigned_or_unchanged { + using type = typename std::make_unsigned::type; +}; + +#if FMT_SAFE_DURATION_CAST +// throwing version of safe_duration_cast +template +To fmt_safe_duration_cast(std::chrono::duration from) { + int ec; + To to = safe_duration_cast::safe_duration_cast(from, ec); + if (ec) FMT_THROW(format_error("cannot format duration")); + return to; +} +#endif + +template ::value)> +inline std::chrono::duration get_milliseconds( + std::chrono::duration d) { + // this may overflow and/or the result may not fit in the + // target type. +#if FMT_SAFE_DURATION_CAST + using CommonSecondsType = + typename std::common_type::type; + const auto d_as_common = fmt_safe_duration_cast(d); + const auto d_as_whole_seconds = + fmt_safe_duration_cast(d_as_common); + // this conversion should be nonproblematic + const auto diff = d_as_common - d_as_whole_seconds; + const auto ms = + fmt_safe_duration_cast>(diff); + return ms; +#else + auto s = std::chrono::duration_cast(d); + return std::chrono::duration_cast(d - s); +#endif +} + +template ::value)> +inline std::chrono::duration get_milliseconds( + std::chrono::duration d) { + using common_type = typename std::common_type::type; + auto ms = mod(d.count() * static_cast(Period::num) / + static_cast(Period::den) * 1000, + 1000); + return std::chrono::duration(static_cast(ms)); +} + +template +OutputIt format_duration_value(OutputIt out, Rep val, int precision) { + const Char pr_f[] = {'{', ':', '.', '{', '}', 'f', '}', 0}; + if (precision >= 0) return format_to(out, pr_f, val, precision); + const Char fp_f[] = {'{', ':', 'g', '}', 0}; + const Char format[] = {'{', '}', 0}; + return format_to(out, std::is_floating_point::value ? fp_f : format, + val); +} + +template +OutputIt format_duration_unit(OutputIt out) { + if (const char* unit = get_units()) { + string_view s(unit); + if (const_check(std::is_same())) { + utf8_to_utf16 u(s); + return std::copy(u.c_str(), u.c_str() + u.size(), out); + } + return std::copy(s.begin(), s.end(), out); + } + const Char num_f[] = {'[', '{', '}', ']', 's', 0}; + if (Period::den == 1) return format_to(out, num_f, Period::num); + const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0}; + return format_to(out, num_def_f, Period::num, Period::den); +} + +template +struct chrono_formatter { + FormatContext& context; + OutputIt out; + int precision; + // rep is unsigned to avoid overflow. + using rep = + conditional_t::value && sizeof(Rep) < sizeof(int), + unsigned, typename make_unsigned_or_unchanged::type>; + rep val; + using seconds = std::chrono::duration; + seconds s; + using milliseconds = std::chrono::duration; + bool negative; + + using char_type = typename FormatContext::char_type; + + explicit chrono_formatter(FormatContext& ctx, OutputIt o, + std::chrono::duration d) + : context(ctx), + out(o), + val(static_cast(d.count())), + negative(false) { + if (d.count() < 0) { + val = 0 - val; + negative = true; + } + + // this may overflow and/or the result may not fit in the + // target type. +#if FMT_SAFE_DURATION_CAST + // might need checked conversion (rep!=Rep) + auto tmpval = std::chrono::duration(val); + s = fmt_safe_duration_cast(tmpval); +#else + s = std::chrono::duration_cast( + std::chrono::duration(val)); +#endif + } + + // returns true if nan or inf, writes to out. + bool handle_nan_inf() { + if (isfinite(val)) { + return false; + } + if (isnan(val)) { + write_nan(); + return true; + } + // must be +-inf + if (val > 0) { + write_pinf(); + } else { + write_ninf(); + } + return true; + } + + Rep hour() const { return static_cast(mod((s.count() / 3600), 24)); } + + Rep hour12() const { + Rep hour = static_cast(mod((s.count() / 3600), 12)); + return hour <= 0 ? 12 : hour; + } + + Rep minute() const { return static_cast(mod((s.count() / 60), 60)); } + Rep second() const { return static_cast(mod(s.count(), 60)); } + + std::tm time() const { + auto time = std::tm(); + time.tm_hour = to_nonnegative_int(hour(), 24); + time.tm_min = to_nonnegative_int(minute(), 60); + time.tm_sec = to_nonnegative_int(second(), 60); + return time; + } + + void write_sign() { + if (negative) { + *out++ = '-'; + negative = false; + } + } + + void write(Rep value, int width) { + write_sign(); + if (isnan(value)) return write_nan(); + uint32_or_64_or_128_t n = + to_unsigned(to_nonnegative_int(value, max_value())); + int num_digits = internal::count_digits(n); + if (width > num_digits) out = std::fill_n(out, width - num_digits, '0'); + out = format_decimal(out, n, num_digits); + } + + void write_nan() { std::copy_n("nan", 3, out); } + void write_pinf() { std::copy_n("inf", 3, out); } + void write_ninf() { std::copy_n("-inf", 4, out); } + + void format_localized(const tm& time, char format, char modifier = 0) { + if (isnan(val)) return write_nan(); + auto locale = context.locale().template get(); + auto& facet = std::use_facet>(locale); + std::basic_ostringstream os; + os.imbue(locale); + facet.put(os, os, ' ', &time, format, modifier); + auto str = os.str(); + std::copy(str.begin(), str.end(), out); + } + + void on_text(const char_type* begin, const char_type* end) { + std::copy(begin, end, out); + } + + // These are not implemented because durations don't have date information. + void on_abbr_weekday() {} + void on_full_weekday() {} + void on_dec0_weekday(numeric_system) {} + void on_dec1_weekday(numeric_system) {} + void on_abbr_month() {} + void on_full_month() {} + void on_datetime(numeric_system) {} + void on_loc_date(numeric_system) {} + void on_loc_time(numeric_system) {} + void on_us_date() {} + void on_iso_date() {} + void on_utc_offset() {} + void on_tz_name() {} + + void on_24_hour(numeric_system ns) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) return write(hour(), 2); + auto time = tm(); + time.tm_hour = to_nonnegative_int(hour(), 24); + format_localized(time, 'H', 'O'); + } + + void on_12_hour(numeric_system ns) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) return write(hour12(), 2); + auto time = tm(); + time.tm_hour = to_nonnegative_int(hour12(), 12); + format_localized(time, 'I', 'O'); + } + + void on_minute(numeric_system ns) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) return write(minute(), 2); + auto time = tm(); + time.tm_min = to_nonnegative_int(minute(), 60); + format_localized(time, 'M', 'O'); + } + + void on_second(numeric_system ns) { + if (handle_nan_inf()) return; + + if (ns == numeric_system::standard) { + write(second(), 2); +#if FMT_SAFE_DURATION_CAST + // convert rep->Rep + using duration_rep = std::chrono::duration; + using duration_Rep = std::chrono::duration; + auto tmpval = fmt_safe_duration_cast(duration_rep{val}); +#else + auto tmpval = std::chrono::duration(val); +#endif + auto ms = get_milliseconds(tmpval); + if (ms != std::chrono::milliseconds(0)) { + *out++ = '.'; + write(ms.count(), 3); + } + return; + } + auto time = tm(); + time.tm_sec = to_nonnegative_int(second(), 60); + format_localized(time, 'S', 'O'); + } + + void on_12_hour_time() { + if (handle_nan_inf()) return; + format_localized(time(), 'r'); + } + + void on_24_hour_time() { + if (handle_nan_inf()) { + *out++ = ':'; + handle_nan_inf(); + return; + } + + write(hour(), 2); + *out++ = ':'; + write(minute(), 2); + } + + void on_iso_time() { + on_24_hour_time(); + *out++ = ':'; + if (handle_nan_inf()) return; + write(second(), 2); + } + + void on_am_pm() { + if (handle_nan_inf()) return; + format_localized(time(), 'p'); + } + + void on_duration_value() { + if (handle_nan_inf()) return; + write_sign(); + out = format_duration_value(out, val, precision); + } + + void on_duration_unit() { + out = format_duration_unit(out); + } +}; +} // namespace internal + +template +struct formatter, Char> { + private: + basic_format_specs specs; + int precision; + using arg_ref_type = internal::arg_ref; + arg_ref_type width_ref; + arg_ref_type precision_ref; + mutable basic_string_view format_str; + using duration = std::chrono::duration; + + struct spec_handler { + formatter& f; + basic_format_parse_context& context; + basic_string_view format_str; + + template FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) { + context.check_arg_id(arg_id); + return arg_ref_type(arg_id); + } + + FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view arg_id) { + context.check_arg_id(arg_id); + return arg_ref_type(arg_id); + } + + FMT_CONSTEXPR arg_ref_type make_arg_ref(internal::auto_id) { + return arg_ref_type(context.next_arg_id()); + } + + void on_error(const char* msg) { FMT_THROW(format_error(msg)); } + void on_fill(basic_string_view fill) { f.specs.fill = fill; } + void on_align(align_t align) { f.specs.align = align; } + void on_width(int width) { f.specs.width = width; } + void on_precision(int _precision) { f.precision = _precision; } + void end_precision() {} + + template void on_dynamic_width(Id arg_id) { + f.width_ref = make_arg_ref(arg_id); + } + + template void on_dynamic_precision(Id arg_id) { + f.precision_ref = make_arg_ref(arg_id); + } + }; + + using iterator = typename basic_format_parse_context::iterator; + struct parse_range { + iterator begin; + iterator end; + }; + + FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context& ctx) { + auto begin = ctx.begin(), end = ctx.end(); + if (begin == end || *begin == '}') return {begin, begin}; + spec_handler handler{*this, ctx, format_str}; + begin = internal::parse_align(begin, end, handler); + if (begin == end) return {begin, begin}; + begin = internal::parse_width(begin, end, handler); + if (begin == end) return {begin, begin}; + if (*begin == '.') { + if (std::is_floating_point::value) + begin = internal::parse_precision(begin, end, handler); + else + handler.on_error("precision not allowed for this argument type"); + } + end = parse_chrono_format(begin, end, internal::chrono_format_checker()); + return {begin, end}; + } + + public: + formatter() : precision(-1) {} + + FMT_CONSTEXPR auto parse(basic_format_parse_context& ctx) + -> decltype(ctx.begin()) { + auto range = do_parse(ctx); + format_str = basic_string_view( + &*range.begin, internal::to_unsigned(range.end - range.begin)); + return range.end; + } + + template + auto format(const duration& d, FormatContext& ctx) -> decltype(ctx.out()) { + auto begin = format_str.begin(), end = format_str.end(); + // As a possible future optimization, we could avoid extra copying if width + // is not specified. + basic_memory_buffer buf; + auto out = std::back_inserter(buf); + using range = internal::output_range; + internal::basic_writer w(range(ctx.out())); + internal::handle_dynamic_spec(specs.width, + width_ref, ctx); + internal::handle_dynamic_spec( + precision, precision_ref, ctx); + if (begin == end || *begin == '}') { + out = internal::format_duration_value(out, d.count(), precision); + internal::format_duration_unit(out); + } else { + internal::chrono_formatter f( + ctx, out, d); + f.precision = precision; + parse_chrono_format(begin, end, f); + } + w.write(buf.data(), buf.size(), specs); + return w.out(); + } +}; + +FMT_END_NAMESPACE + +#endif // FMT_CHRONO_H_ Index: libraries/source/fmt/include/fmt/color.h =================================================================== --- /dev/null +++ libraries/source/fmt/include/fmt/color.h @@ -0,0 +1,568 @@ +// 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 internal { + +// 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(rgb_color); + } + FMT_CONSTEXPR color_type(rgb rgb_color) FMT_NOEXCEPT : is_rgb(true), value{} { + value.rgb_color = (static_cast(rgb_color.r) << 16) | + (static_cast(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(term_color); + } + bool is_rgb; + union color_union { + uint8_t term_color; + uint32_t rgb_color; + } value; +}; +} // namespace internal + +// 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(static_cast(ems) | + static_cast(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(static_cast(ems) & + static_cast(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(ems) != 0; + } + FMT_CONSTEXPR internal::color_type get_foreground() const FMT_NOEXCEPT { + FMT_ASSERT(has_foreground(), "no foreground specified for this style"); + return foreground_color; + } + FMT_CONSTEXPR internal::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, + internal::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(internal::color_type foreground) + FMT_NOEXCEPT; + friend FMT_CONSTEXPR_DECL text_style bg(internal::color_type background) + FMT_NOEXCEPT; + + internal::color_type foreground_color; + internal::color_type background_color; + bool set_foreground_color; + bool set_background_color; + emphasis ems; +}; + +FMT_CONSTEXPR text_style fg(internal::color_type foreground) FMT_NOEXCEPT { + return text_style(/*is_foreground=*/true, foreground); +} + +FMT_CONSTEXPR text_style bg(internal::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 internal { + +template struct ansi_color_escape { + FMT_CONSTEXPR ansi_color_escape(internal::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 == internal::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; + + std::size_t index = 0; + buffer[index++] = static_cast('\x1b'); + buffer[index++] = static_cast('['); + + if (value >= 100u) { + buffer[index++] = static_cast('1'); + value %= 100u; + } + buffer[index++] = static_cast('0' + value / 10u); + buffer[index++] = static_cast('0' + value % 10u); + + buffer[index++] = static_cast('m'); + buffer[index++] = static_cast('\0'); + return; + } + + for (int i = 0; i < 7; i++) { + buffer[i] = static_cast(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(0); + } + FMT_CONSTEXPR ansi_color_escape(emphasis em) FMT_NOEXCEPT { + uint8_t em_codes[4] = {}; + uint8_t em_bits = static_cast(em); + if (em_bits & static_cast(emphasis::bold)) em_codes[0] = 1; + if (em_bits & static_cast(emphasis::italic)) em_codes[1] = 3; + if (em_bits & static_cast(emphasis::underline)) em_codes[2] = 4; + if (em_bits & static_cast(emphasis::strikethrough)) + em_codes[3] = 9; + + std::size_t index = 0; + for (int i = 0; i < 4; ++i) { + if (!em_codes[i]) continue; + buffer[index++] = static_cast('\x1b'); + buffer[index++] = static_cast('['); + buffer[index++] = static_cast('0' + em_codes[i]); + buffer[index++] = static_cast('m'); + } + buffer[index++] = static_cast(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::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('0' + c / 100); + out[1] = static_cast('0' + c / 10 % 10); + out[2] = static_cast('0' + c % 10); + out[3] = static_cast(delimiter); + } +}; + +template +FMT_CONSTEXPR ansi_color_escape make_foreground_color( + internal::color_type foreground) FMT_NOEXCEPT { + return ansi_color_escape(foreground, internal::data::foreground_color); +} + +template +FMT_CONSTEXPR ansi_color_escape make_background_color( + internal::color_type background) FMT_NOEXCEPT { + return ansi_color_escape(background, internal::data::background_color); +} + +template +FMT_CONSTEXPR ansi_color_escape make_emphasis(emphasis em) FMT_NOEXCEPT { + return ansi_color_escape(em); +} + +template +inline void fputs(const Char* chars, FILE* stream) FMT_NOEXCEPT { + std::fputs(chars, stream); +} + +template <> +inline void fputs(const wchar_t* chars, FILE* stream) FMT_NOEXCEPT { + std::fputws(chars, stream); +} + +template inline void reset_color(FILE* stream) FMT_NOEXCEPT { + fputs(internal::data::reset_color, stream); +} + +template <> inline void reset_color(FILE* stream) FMT_NOEXCEPT { + fputs(internal::data::wreset_color, stream); +} + +template +inline void reset_color(basic_memory_buffer& buffer) FMT_NOEXCEPT { + const char* begin = data::reset_color; + const char* end = begin + sizeof(data::reset_color) - 1; + buffer.append(begin, end); +} + +template +void vformat_to(basic_memory_buffer& buf, const text_style& ts, + basic_string_view format_str, + basic_format_args> args) { + bool has_style = false; + if (ts.has_emphasis()) { + has_style = true; + auto emphasis = internal::make_emphasis(ts.get_emphasis()); + buf.append(emphasis.begin(), emphasis.end()); + } + if (ts.has_foreground()) { + has_style = true; + auto foreground = + internal::make_foreground_color(ts.get_foreground()); + buf.append(foreground.begin(), foreground.end()); + } + if (ts.has_background()) { + has_style = true; + auto background = + internal::make_background_color(ts.get_background()); + buf.append(background.begin(), background.end()); + } + internal::vformat_to(buf, format_str, args); + if (has_style) internal::reset_color(buf); +} +} // namespace internal + +template > +void vprint(std::FILE* f, const text_style& ts, const S& format, + basic_format_args> args) { + basic_memory_buffer buf; + internal::vformat_to(buf, ts, to_string_view(format), args); + buf.push_back(Char(0)); + internal::fputs(buf.data(), f); +} + +/** + 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); + */ +template ::value)> +void print(std::FILE* f, const text_style& ts, const S& format_str, + const Args&... args) { + internal::check_format_string(format_str); + using context = buffer_context>; + format_arg_store as{args...}; + vprint(f, ts, format_str, basic_format_args(as)); +} + +/** + 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 ::value)> +void print(const text_style& ts, const S& format_str, const Args&... args) { + return print(stdout, ts, format_str, args...); +} + +template > +inline std::basic_string vformat( + const text_style& ts, const S& format_str, + basic_format_args>> args) { + basic_memory_buffer buf; + internal::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 + std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red), + "The answer is {}", 42); + \endrst +*/ +template > +inline std::basic_string format(const text_style& ts, const S& format_str, + const Args&... args) { + return vformat(ts, to_string_view(format_str), + internal::make_args_checked(format_str, args...)); +} + +FMT_END_NAMESPACE + +#endif // FMT_COLOR_H_ Index: libraries/source/fmt/include/fmt/compile.h =================================================================== --- /dev/null +++ libraries/source/fmt/include/fmt/compile.h @@ -0,0 +1,595 @@ +// 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 + +#include "format.h" + +FMT_BEGIN_NAMESPACE +namespace internal { + +// Part of a compiled format string. It can be either literal text or a +// replacement field. +template struct format_part { + enum class kind { arg_index, arg_name, text, replacement }; + + struct replacement { + arg_ref arg_id; + dynamic_format_specs specs; + }; + + kind part_kind; + union value { + int arg_index; + basic_string_view str; + replacement repl; + + FMT_CONSTEXPR value(int index = 0) : arg_index(index) {} + FMT_CONSTEXPR value(basic_string_view 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 name) { + return format_part(kind::arg_name, name); + } + static FMT_CONSTEXPR format_part make_text(basic_string_view text) { + return format_part(kind::text, text); + } + static FMT_CONSTEXPR format_part make_replacement(replacement repl) { + return format_part(kind::replacement, repl); + } +}; + +template 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 void on_arg_id() { ++num_parts; } + FMT_CONSTEXPR void on_arg_id(int) { ++num_parts; } + FMT_CONSTEXPR void on_arg_id(basic_string_view) { ++num_parts; } + + FMT_CONSTEXPR void on_replacement_field(const Char*) {} + + FMT_CONSTEXPR const Char* on_format_specs(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 +FMT_CONSTEXPR unsigned count_parts(basic_string_view format_str) { + part_counter counter; + parse_format_string(format_str, counter); + return counter.num_parts; +} + +template +class format_string_compiler : public error_handler { + private: + using part = format_part; + + PartHandler handler_; + part part_; + basic_string_view format_str_; + basic_format_parse_context parse_context_; + + public: + FMT_CONSTEXPR format_string_compiler(basic_string_view 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 void on_arg_id() { + part_ = part::make_arg_index(parse_context_.next_arg_id()); + } + + FMT_CONSTEXPR void on_arg_id(int id) { + parse_context_.check_arg_id(id); + part_ = part::make_arg_index(id); + } + + FMT_CONSTEXPR void on_arg_id(basic_string_view id) { + part_ = part::make_arg_name(id); + } + + FMT_CONSTEXPR void on_replacement_field(const Char* ptr) { + part_.arg_id_end = ptr; + handler_(part_); + } + + FMT_CONSTEXPR const Char* on_format_specs(const Char* begin, + const Char* end) { + auto repl = typename part::replacement(); + dynamic_specs_handler> 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(part_.val.arg_index) + : arg_ref(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 +FMT_CONSTEXPR void compile_format_string(basic_string_view format_str, + PartHandler handler) { + parse_format_string( + format_str, + format_string_compiler(format_str, handler)); +} + +template +void format_arg( + basic_format_parse_context& parse_ctx, + Context& ctx, Id arg_id) { + ctx.advance_to( + visit_format_arg(arg_formatter(ctx, &parse_ctx), ctx.arg(arg_id))); +} + +// vformat_to is defined in a subnamespace to prevent ADL. +namespace cf { +template +auto vformat_to(Range out, CompiledFormat& cf, basic_format_args args) + -> typename Context::iterator { + using char_type = typename Context::char_type; + basic_format_parse_context parse_ctx( + to_string_view(cf.format_str_)); + Context ctx(out.begin(), 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; + 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); + internal::format_arg(parse_ctx, ctx, value.arg_index); + break; + + case format_part_t::kind::arg_name: + advance_to(parse_ctx, part.arg_id_end); + internal::format_arg(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(specs.width, specs.width_ref, ctx); + handle_dynamic_spec(specs.precision, + specs.precision_ref, ctx); + + error_handler h; + numeric_specs_checker 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(ctx, nullptr, &specs), arg)); + break; + } + } + } + return ctx.out(); +} +} // namespace cf + +struct basic_compiled_format {}; + +template +struct compiled_format_base : basic_compiled_format { + using char_type = char_t; + using parts_container = std::vector>; + + parts_container compiled_parts; + + explicit compiled_format_base(basic_string_view format_str) { + compile_format_string(format_str, + [this](const format_part& part) { + compiled_parts.push_back(part); + }); + } + + const parts_container& parts() const { return compiled_parts; } +}; + +template struct format_part_array { + format_part data[N] = {}; + FMT_CONSTEXPR format_part_array() = default; +}; + +template +FMT_CONSTEXPR format_part_array compile_to_parts( + basic_string_view format_str) { + format_part_array parts; + unsigned counter = 0; + // This is not a lambda for compatibility with older compilers. + struct { + format_part* parts; + unsigned* counter; + FMT_CONSTEXPR void operator()(const format_part& part) { + parts[(*counter)++] = part; + } + } collector{parts.data, &counter}; + compile_format_string(format_str, collector); + if (counter < N) { + parts.data[counter] = + format_part::make_text(basic_string_view()); + } + return parts; +} + +template constexpr const T& constexpr_max(const T& a, const T& b) { + return (a < b) ? b : a; +} + +template +struct compiled_format_base::value>> + : basic_compiled_format { + using char_type = char_t; + + FMT_CONSTEXPR explicit compiled_format_base(basic_string_view) {} + +// 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[num_format_parts]; + + const parts_container& parts() const { + static FMT_CONSTEXPR_DECL const auto compiled_parts = + compile_to_parts( + internal::to_string_view(S())); + return compiled_parts.data; + } +}; + +template +class compiled_format : private compiled_format_base { + public: + using typename compiled_format_base::char_type; + + private: + basic_string_view format_str_; + + template + friend auto cf::vformat_to(Range out, CompiledFormat& cf, + basic_format_args args) -> + typename Context::iterator; + + public: + compiled_format() = delete; + explicit constexpr compiled_format(basic_string_view format_str) + : compiled_format_base(format_str), format_str_(format_str) {} +}; + +#ifdef __cpp_if_constexpr +template struct type_list {}; + +// Returns a reference to the argument at index N from [first, rest...]. +template +constexpr const auto& get(const T& first, const Args&... rest) { + static_assert(N < 1 + sizeof...(Args), "index is out of bounds"); + if constexpr (N == 0) + return first; + else + return get(rest...); +} + +template struct get_type_impl; + +template struct get_type_impl> { + using type = remove_cvref_t(std::declval()...))>; +}; + +template +using get_type = typename get_type_impl::type; + +template struct is_compiled_format : std::false_type {}; + +template struct text { + basic_string_view data; + using char_type = Char; + + template + OutputIt format(OutputIt out, const Args&...) const { + // TODO: reserve + return copy_str(data.begin(), data.end(), out); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +template +constexpr text make_text(basic_string_view s, size_t pos, + size_t size) { + return {{&s[pos], size}}; +} + +template , int> = 0> +OutputIt format_default(OutputIt out, T value) { + // TODO: reserve + format_int fi(value); + return std::copy(fi.data(), fi.data() + fi.size(), out); +} + +template +OutputIt format_default(OutputIt out, double value) { + writer w(out); + w.write(value); + return w.out(); +} + +template +OutputIt format_default(OutputIt out, Char value) { + *out++ = value; + return out; +} + +template +OutputIt format_default(OutputIt out, const Char* value) { + auto length = std::char_traits::length(value); + return copy_str(value, value + length, out); +} + +// A replacement field that refers to argument N. +template struct field { + using char_type = Char; + + template + OutputIt format(OutputIt out, const Args&... args) const { + // This ensures that the argument type is convertile to `const T&`. + const T& arg = get(args...); + return format_default(out, arg); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +template struct concat { + L lhs; + R rhs; + using char_type = typename L::char_type; + + template + OutputIt format(OutputIt out, const Args&... args) const { + out = lhs.format(out, args...); + return rhs.format(out, args...); + } +}; + +template +struct is_compiled_format> : std::true_type {}; + +template +constexpr concat make_concat(L lhs, R rhs) { + return {lhs, rhs}; +} + +struct unknown_format {}; + +template +constexpr size_t parse_text(basic_string_view str, size_t pos) { + for (size_t size = str.size(); pos != size; ++pos) { + if (str[pos] == '{' || str[pos] == '}') break; + } + return pos; +} + +template +constexpr auto compile_format_string(S format_str); + +template +constexpr auto parse_tail(T head, S format_str) { + if constexpr (POS != to_string_view(format_str).size()) { + constexpr auto tail = compile_format_string(format_str); + if constexpr (std::is_same, + unknown_format>()) + return tail; + else + return make_concat(head, tail); + } else { + return head; + } +} + +// Compiles a non-empty format string and returns the compiled representation +// or unknown_format() on unrecognized input. +template +constexpr auto compile_format_string(S format_str) { + using char_type = typename S::char_type; + constexpr basic_string_view 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(make_text(str, POS, 1), format_str); + } else if constexpr (str[POS + 1] == '}') { + using type = get_type; + if constexpr (std::is_same::value) { + return parse_tail(field(), + format_str); + } else { + return unknown_format(); + } + } else { + return unknown_format(); + } + } else if constexpr (str[POS] == '}') { + if (POS + 1 == str.size()) + throw format_error("unmatched '}' in format string"); + return parse_tail(make_text(str, POS, 1), format_str); + } else { + constexpr auto end = parse_text(str, POS + 1); + return parse_tail(make_text(str, POS, end - POS), + format_str); + } +} +#endif // __cpp_if_constexpr +} // namespace internal + +#if FMT_USE_CONSTEXPR +# ifdef __cpp_if_constexpr +template ::value)> +constexpr auto compile(S format_str) { + constexpr basic_string_view str = format_str; + if constexpr (str.size() == 0) { + return internal::make_text(str, 0, 0); + } else { + constexpr auto result = + internal::compile_format_string, 0, 0>( + format_str); + if constexpr (std::is_same, + internal::unknown_format>()) { + return internal::compiled_format(to_string_view(format_str)); + } else { + return result; + } + } +} + +template ::value)> +std::basic_string format(const CompiledFormat& cf, const Args&... args) { + basic_memory_buffer buffer; + cf.format(std::back_inserter(buffer), args...); + return to_string(buffer); +} + +template ::value)> +OutputIt format_to(OutputIt out, const CompiledFormat& cf, + const Args&... args) { + return cf.format(out, args...); +} +# else +template ::value)> +constexpr auto compile(S format_str) -> internal::compiled_format { + return internal::compiled_format(to_string_view(format_str)); +} +# endif // __cpp_if_constexpr +#endif // FMT_USE_CONSTEXPR + +// Compiles the format string which must be a string literal. +template +auto compile(const Char (&format_str)[N]) + -> internal::compiled_format { + return internal::compiled_format( + basic_string_view(format_str, N - 1)); +} + +template ::value)> +std::basic_string format(const CompiledFormat& cf, const Args&... args) { + basic_memory_buffer buffer; + using range = buffer_range; + using context = buffer_context; + internal::cf::vformat_to(range(buffer), cf, + make_format_args(args...)); + return to_string(buffer); +} + +template ::value)> +OutputIt format_to(OutputIt out, const CompiledFormat& cf, + const Args&... args) { + using char_type = typename CompiledFormat::char_type; + using range = internal::output_range; + using context = format_context_t; + return internal::cf::vformat_to(range(out), cf, + make_format_args(args...)); +} + +template ::value)> +format_to_n_result format_to_n(OutputIt out, size_t n, + const CompiledFormat& cf, + const Args&... args) { + auto it = + format_to(internal::truncating_iterator(out, n), cf, args...); + return {it.base(), it.count()}; +} + +template +std::size_t formatted_size(const CompiledFormat& cf, const Args&... args) { + return format_to(internal::counting_iterator(), cf, args...).count(); +} + +FMT_END_NAMESPACE + +#endif // FMT_COMPILE_H_ Index: libraries/source/fmt/include/fmt/core.h =================================================================== --- /dev/null +++ libraries/source/fmt/include/fmt/core.h @@ -0,0 +1,1788 @@ +// Formatting library for C++ - the core API +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_CORE_H_ +#define FMT_CORE_H_ + +#include // std::FILE +#include +#include +#include +#include +#include +#include +#include + +// The fmt library version in the form major * 10000 + minor * 100 + patch. +#define FMT_VERSION 60103 + +#ifdef __has_feature +# define FMT_HAS_FEATURE(x) __has_feature(x) +#else +# define FMT_HAS_FEATURE(x) 0 +#endif + +#if defined(__has_include) && !defined(__INTELLISENSE__) && \ + !(defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1600) +# define FMT_HAS_INCLUDE(x) __has_include(x) +#else +# define FMT_HAS_INCLUDE(x) 0 +#endif + +#ifdef __has_cpp_attribute +# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x) +#else +# define FMT_HAS_CPP_ATTRIBUTE(x) 0 +#endif + +#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \ + (__cplusplus >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute)) + +#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \ + (__cplusplus >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute)) + +#ifdef __clang__ +# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) +#else +# define FMT_CLANG_VERSION 0 +#endif + +#if defined(__GNUC__) && !defined(__clang__) +# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) +#else +# define FMT_GCC_VERSION 0 +#endif + +#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) +# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION +#else +# define FMT_HAS_GXX_CXX11 0 +#endif + +#ifdef __NVCC__ +# define FMT_NVCC __NVCC__ +#else +# define FMT_NVCC 0 +#endif + +#ifdef _MSC_VER +# define FMT_MSC_VER _MSC_VER +#else +# define FMT_MSC_VER 0 +#endif + +// Check if relaxed C++14 constexpr is supported. +// GCC doesn't allow throw in constexpr until version 6 (bug 67371). +#ifndef FMT_USE_CONSTEXPR +# define FMT_USE_CONSTEXPR \ + (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 || \ + (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) && \ + !FMT_NVCC +#endif +#if FMT_USE_CONSTEXPR +# define FMT_CONSTEXPR constexpr +# define FMT_CONSTEXPR_DECL constexpr +#else +# define FMT_CONSTEXPR inline +# define FMT_CONSTEXPR_DECL +#endif + +#ifndef FMT_OVERRIDE +# if FMT_HAS_FEATURE(cxx_override) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +# define FMT_OVERRIDE override +# else +# define FMT_OVERRIDE +# endif +#endif + +// Check if exceptions are disabled. +#ifndef FMT_EXCEPTIONS +# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \ + FMT_MSC_VER && !_HAS_EXCEPTIONS +# define FMT_EXCEPTIONS 0 +# else +# define FMT_EXCEPTIONS 1 +# endif +#endif + +// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature). +#ifndef FMT_USE_NOEXCEPT +# define FMT_USE_NOEXCEPT 0 +#endif + +#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \ + (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900 +# define FMT_DETECTED_NOEXCEPT noexcept +# define FMT_HAS_CXX11_NOEXCEPT 1 +#else +# define FMT_DETECTED_NOEXCEPT throw() +# define FMT_HAS_CXX11_NOEXCEPT 0 +#endif + +#ifndef FMT_NOEXCEPT +# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT +# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT +# else +# define FMT_NOEXCEPT +# endif +#endif + +// [[noreturn]] is disabled on MSVC and NVCC because of bogus unreachable code +// warnings. +#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER && \ + !FMT_NVCC +# define FMT_NORETURN [[noreturn]] +#else +# define FMT_NORETURN +#endif + +#ifndef FMT_MAYBE_UNUSED +# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused) +# define FMT_MAYBE_UNUSED [[maybe_unused]] +# else +# define FMT_MAYBE_UNUSED +# endif +#endif + +#ifndef FMT_DEPRECATED +# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900 +# define FMT_DEPRECATED [[deprecated]] +# else +# if defined(__GNUC__) || defined(__clang__) +# define FMT_DEPRECATED __attribute__((deprecated)) +# elif FMT_MSC_VER +# define FMT_DEPRECATED __declspec(deprecated) +# else +# define FMT_DEPRECATED /* deprecated */ +# endif +# endif +#endif + +// Workaround broken [[deprecated]] in the Intel, PGI and NVCC compilers. +#if defined(__INTEL_COMPILER) || defined(__PGI) || FMT_NVCC +# define FMT_DEPRECATED_ALIAS +#else +# define FMT_DEPRECATED_ALIAS FMT_DEPRECATED +#endif + +#ifndef FMT_BEGIN_NAMESPACE +# if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \ + FMT_MSC_VER >= 1900 +# define FMT_INLINE_NAMESPACE inline namespace +# define FMT_END_NAMESPACE \ + } \ + } +# else +# define FMT_INLINE_NAMESPACE namespace +# define FMT_END_NAMESPACE \ + } \ + using namespace v6; \ + } +# endif +# define FMT_BEGIN_NAMESPACE \ + namespace fmt { \ + FMT_INLINE_NAMESPACE v6 { +#endif + +#if !defined(FMT_HEADER_ONLY) && defined(_WIN32) +# if FMT_MSC_VER +# define FMT_NO_W4275 __pragma(warning(suppress : 4275)) +# else +# define FMT_NO_W4275 +# endif +# define FMT_CLASS_API FMT_NO_W4275 +# ifdef FMT_EXPORT +# define FMT_API __declspec(dllexport) +# elif defined(FMT_SHARED) +# define FMT_API __declspec(dllimport) +# define FMT_EXTERN_TEMPLATE_API FMT_API +# endif +#endif +#ifndef FMT_CLASS_API +# define FMT_CLASS_API +#endif +#ifndef FMT_API +# if FMT_GCC_VERSION || FMT_CLANG_VERSION +# define FMT_API __attribute__((visibility("default"))) +# define FMT_EXTERN_TEMPLATE_API FMT_API +# define FMT_INSTANTIATION_DEF_API +# else +# define FMT_API +# endif +#endif +#ifndef FMT_EXTERN_TEMPLATE_API +# define FMT_EXTERN_TEMPLATE_API +#endif +#ifndef FMT_INSTANTIATION_DEF_API +# define FMT_INSTANTIATION_DEF_API FMT_API +#endif + +#ifndef FMT_HEADER_ONLY +# define FMT_EXTERN extern +#else +# define FMT_EXTERN +#endif + +// libc++ supports string_view in pre-c++17. +#if (FMT_HAS_INCLUDE() && \ + (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \ + (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910) +# include +# define FMT_USE_STRING_VIEW +#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L +# include +# define FMT_USE_EXPERIMENTAL_STRING_VIEW +#endif + +#ifndef FMT_UNICODE +# define FMT_UNICODE !FMT_MSC_VER +#endif +#if FMT_UNICODE && FMT_MSC_VER +# pragma execution_character_set("utf-8") +#endif + +FMT_BEGIN_NAMESPACE + +// Implementations of enable_if_t and other metafunctions for older systems. +template +using enable_if_t = typename std::enable_if::type; +template +using conditional_t = typename std::conditional::type; +template using bool_constant = std::integral_constant; +template +using remove_reference_t = typename std::remove_reference::type; +template +using remove_const_t = typename std::remove_const::type; +template +using remove_cvref_t = typename std::remove_cv>::type; +template struct type_identity { using type = T; }; +template using type_identity_t = typename type_identity::type; + +struct monostate {}; + +// An enable_if helper to be used in template parameters which results in much +// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed +// to workaround a bug in MSVC 2019 (see #1140 and #1186). +#define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0 + +namespace internal { + +// A helper function to suppress bogus "conditional expression is constant" +// warnings. +template FMT_CONSTEXPR T const_check(T value) { return value; } + +// A workaround for gcc 4.8 to make void_t work in a SFINAE context. +template struct void_t_impl { using type = void; }; + +FMT_NORETURN FMT_API void assert_fail(const char* file, int line, + const char* message); + +#ifndef FMT_ASSERT +# ifdef NDEBUG +// FMT_ASSERT is not empty to avoid -Werror=empty-body. +# define FMT_ASSERT(condition, message) ((void)0) +# else +# define FMT_ASSERT(condition, message) \ + ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \ + ? (void)0 \ + : ::fmt::internal::assert_fail(__FILE__, __LINE__, (message))) +# endif +#endif + +#if defined(FMT_USE_STRING_VIEW) +template using std_string_view = std::basic_string_view; +#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW) +template +using std_string_view = std::experimental::basic_string_view; +#else +template struct std_string_view {}; +#endif + +#ifdef FMT_USE_INT128 +// Do nothing. +#elif defined(__SIZEOF_INT128__) && !FMT_NVCC +# define FMT_USE_INT128 1 +using int128_t = __int128_t; +using uint128_t = __uint128_t; +#else +# define FMT_USE_INT128 0 +#endif +#if !FMT_USE_INT128 +struct int128_t {}; +struct uint128_t {}; +#endif + +// Casts a nonnegative integer to unsigned. +template +FMT_CONSTEXPR typename std::make_unsigned::type to_unsigned(Int value) { + FMT_ASSERT(value >= 0, "negative value"); + return static_cast::type>(value); +} + +constexpr unsigned char micro[] = "\u00B5"; + +constexpr bool is_utf8() { + return FMT_UNICODE || + (sizeof(micro) == 3 && micro[0] == 0xC2 && micro[1] == 0xB5); +} + +#ifdef __cpp_char8_t +using char8_type = char8_t; +#else +enum char8_type : unsigned char {}; +#endif +} // namespace internal + +template +using void_t = typename internal::void_t_impl::type; + +/** + An implementation of ``std::basic_string_view`` for pre-C++17. It provides a + subset of the API. ``fmt::basic_string_view`` is used for format strings even + if ``std::string_view`` is available to prevent issues when a library is + compiled with a different ``-std`` option than the client code (which is not + recommended). + */ +template class basic_string_view { + private: + const Char* data_; + size_t size_; + + public: + using char_type FMT_DEPRECATED_ALIAS = Char; + using value_type = Char; + using iterator = const Char*; + + FMT_CONSTEXPR basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {} + + /** Constructs a string reference object from a C string and a size. */ + FMT_CONSTEXPR basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT + : data_(s), + size_(count) {} + + /** + \rst + Constructs a string reference object from a C string computing + the size with ``std::char_traits::length``. + \endrst + */ +#if __cplusplus >= 201703L // C++17's char_traits::length() is constexpr. + FMT_CONSTEXPR +#endif + basic_string_view(const Char* s) + : data_(s), size_(std::char_traits::length(s)) {} + + /** Constructs a string reference from a ``std::basic_string`` object. */ + template + FMT_CONSTEXPR basic_string_view( + const std::basic_string& s) FMT_NOEXCEPT + : data_(s.data()), + size_(s.size()) {} + + template < + typename S, + FMT_ENABLE_IF(std::is_same>::value)> + FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()), + size_(s.size()) {} + + /** Returns a pointer to the string data. */ + FMT_CONSTEXPR const Char* data() const { return data_; } + + /** Returns the string size. */ + FMT_CONSTEXPR size_t size() const { return size_; } + + FMT_CONSTEXPR iterator begin() const { return data_; } + FMT_CONSTEXPR iterator end() const { return data_ + size_; } + + FMT_CONSTEXPR const Char& operator[](size_t pos) const { return data_[pos]; } + + FMT_CONSTEXPR void remove_prefix(size_t n) { + data_ += n; + size_ -= n; + } + + // Lexicographically compare this string reference to other. + int compare(basic_string_view other) const { + size_t str_size = size_ < other.size_ ? size_ : other.size_; + int result = std::char_traits::compare(data_, other.data_, str_size); + if (result == 0) + result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); + return result; + } + + friend bool operator==(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) == 0; + } + friend bool operator!=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) != 0; + } + friend bool operator<(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) < 0; + } + friend bool operator<=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) <= 0; + } + friend bool operator>(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) > 0; + } + friend bool operator>=(basic_string_view lhs, basic_string_view rhs) { + return lhs.compare(rhs) >= 0; + } +}; + +using string_view = basic_string_view; +using wstring_view = basic_string_view; + +#ifndef __cpp_char8_t +// char8_t is deprecated; use char instead. +using char8_t FMT_DEPRECATED_ALIAS = internal::char8_type; +#endif + +/** Specifies if ``T`` is a character type. Can be specialized by users. */ +template struct is_char : std::false_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; +template <> struct is_char : std::true_type {}; + +/** + \rst + Returns a string view of `s`. In order to add custom string type support to + {fmt} provide an overload of `to_string_view` for it in the same namespace as + the type for the argument-dependent lookup to work. + + **Example**:: + + namespace my_ns { + inline string_view to_string_view(const my_string& s) { + return {s.data(), s.length()}; + } + } + std::string message = fmt::format(my_string("The answer is {}"), 42); + \endrst + */ +template ::value)> +inline basic_string_view to_string_view(const Char* s) { + return s; +} + +template +inline basic_string_view to_string_view( + const std::basic_string& s) { + return s; +} + +template +inline basic_string_view to_string_view(basic_string_view s) { + return s; +} + +template >::value)> +inline basic_string_view to_string_view( + internal::std_string_view s) { + return s; +} + +// A base class for compile-time strings. It is defined in the fmt namespace to +// make formatting functions visible via ADL, e.g. format(fmt("{}"), 42). +struct compile_string {}; + +template +struct is_compile_string : std::is_base_of {}; + +template ::value)> +constexpr basic_string_view to_string_view(const S& s) { + return s; +} + +namespace internal { +void to_string_view(...); +using fmt::v6::to_string_view; + +// Specifies whether S is a string type convertible to fmt::basic_string_view. +// It should be a constexpr function but MSVC 2017 fails to compile it in +// enable_if and MSVC 2015 fails to compile it as an alias template. +template +struct is_string : std::is_class()))> { +}; + +template struct char_t_impl {}; +template struct char_t_impl::value>> { + using result = decltype(to_string_view(std::declval())); + using type = typename result::value_type; +}; + +struct error_handler { + FMT_CONSTEXPR error_handler() = default; + FMT_CONSTEXPR error_handler(const error_handler&) = default; + + // This function is intentionally not constexpr to give a compile-time error. + FMT_NORETURN FMT_API void on_error(const char* message); +}; +} // namespace internal + +/** String's character type. */ +template using char_t = typename internal::char_t_impl::type; + +/** + \rst + Parsing context consisting of a format string range being parsed and an + argument counter for automatic indexing. + + You can use one of the following type aliases for common character types: + + +-----------------------+-------------------------------------+ + | Type | Definition | + +=======================+=====================================+ + | format_parse_context | basic_format_parse_context | + +-----------------------+-------------------------------------+ + | wformat_parse_context | basic_format_parse_context | + +-----------------------+-------------------------------------+ + \endrst + */ +template +class basic_format_parse_context : private ErrorHandler { + private: + basic_string_view format_str_; + int next_arg_id_; + + public: + using char_type = Char; + using iterator = typename basic_string_view::iterator; + + explicit FMT_CONSTEXPR basic_format_parse_context( + basic_string_view format_str, ErrorHandler eh = ErrorHandler()) + : ErrorHandler(eh), format_str_(format_str), next_arg_id_(0) {} + + /** + Returns an iterator to the beginning of the format string range being + parsed. + */ + FMT_CONSTEXPR iterator begin() const FMT_NOEXCEPT { + return format_str_.begin(); + } + + /** + Returns an iterator past the end of the format string range being parsed. + */ + FMT_CONSTEXPR iterator end() const FMT_NOEXCEPT { return format_str_.end(); } + + /** Advances the begin iterator to ``it``. */ + FMT_CONSTEXPR void advance_to(iterator it) { + format_str_.remove_prefix(internal::to_unsigned(it - begin())); + } + + /** + Reports an error if using the manual argument indexing; otherwise returns + the next argument index and switches to the automatic indexing. + */ + FMT_CONSTEXPR int next_arg_id() { + if (next_arg_id_ >= 0) return next_arg_id_++; + on_error("cannot switch from manual to automatic argument indexing"); + return 0; + } + + /** + Reports an error if using the automatic argument indexing; otherwise + switches to the manual indexing. + */ + FMT_CONSTEXPR void check_arg_id(int) { + if (next_arg_id_ > 0) + on_error("cannot switch from automatic to manual argument indexing"); + else + next_arg_id_ = -1; + } + + FMT_CONSTEXPR void check_arg_id(basic_string_view) {} + + FMT_CONSTEXPR void on_error(const char* message) { + ErrorHandler::on_error(message); + } + + FMT_CONSTEXPR ErrorHandler error_handler() const { return *this; } +}; + +using format_parse_context = basic_format_parse_context; +using wformat_parse_context = basic_format_parse_context; + +template +using basic_parse_context FMT_DEPRECATED_ALIAS = + basic_format_parse_context; +using parse_context FMT_DEPRECATED_ALIAS = basic_format_parse_context; +using wparse_context FMT_DEPRECATED_ALIAS = basic_format_parse_context; + +template class basic_format_arg; +template class basic_format_args; + +// A formatter for objects of type T. +template +struct formatter { + // A deleted default constructor indicates a disabled formatter. + formatter() = delete; +}; + +template +struct FMT_DEPRECATED convert_to_int + : bool_constant::value && + std::is_convertible::value> {}; + +// Specifies if T has an enabled formatter specialization. A type can be +// formattable even if it doesn't have a formatter e.g. via a conversion. +template +using has_formatter = + std::is_constructible>; + +namespace internal { + +/** A contiguous memory buffer with an optional growing ability. */ +template class buffer { + private: + T* ptr_; + std::size_t size_; + std::size_t capacity_; + + protected: + // Don't initialize ptr_ since it is not accessed to save a few cycles. + buffer(std::size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {} + + buffer(T* p = nullptr, std::size_t sz = 0, std::size_t cap = 0) FMT_NOEXCEPT + : ptr_(p), + size_(sz), + capacity_(cap) {} + + /** Sets the buffer data and capacity. */ + void set(T* buf_data, std::size_t buf_capacity) FMT_NOEXCEPT { + ptr_ = buf_data; + capacity_ = buf_capacity; + } + + /** Increases the buffer capacity to hold at least *capacity* elements. */ + virtual void grow(std::size_t capacity) = 0; + + public: + using value_type = T; + using const_reference = const T&; + + buffer(const buffer&) = delete; + void operator=(const buffer&) = delete; + virtual ~buffer() = default; + + T* begin() FMT_NOEXCEPT { return ptr_; } + T* end() FMT_NOEXCEPT { return ptr_ + size_; } + + const T* begin() const FMT_NOEXCEPT { return ptr_; } + const T* end() const FMT_NOEXCEPT { return ptr_ + size_; } + + /** Returns the size of this buffer. */ + std::size_t size() const FMT_NOEXCEPT { return size_; } + + /** Returns the capacity of this buffer. */ + std::size_t capacity() const FMT_NOEXCEPT { return capacity_; } + + /** Returns a pointer to the buffer data. */ + T* data() FMT_NOEXCEPT { return ptr_; } + + /** Returns a pointer to the buffer data. */ + const T* data() const FMT_NOEXCEPT { return ptr_; } + + /** + Resizes the buffer. If T is a POD type new elements may not be initialized. + */ + void resize(std::size_t new_size) { + reserve(new_size); + size_ = new_size; + } + + /** Clears this buffer. */ + void clear() { size_ = 0; } + + /** Reserves space to store at least *capacity* elements. */ + void reserve(std::size_t new_capacity) { + if (new_capacity > capacity_) grow(new_capacity); + } + + void push_back(const T& value) { + reserve(size_ + 1); + ptr_[size_++] = value; + } + + /** Appends data to the end of the buffer. */ + template void append(const U* begin, const U* end); + + template T& operator[](I index) { return ptr_[index]; } + template const T& operator[](I index) const { + return ptr_[index]; + } +}; + +// A container-backed buffer. +template +class container_buffer : public buffer { + private: + Container& container_; + + protected: + void grow(std::size_t capacity) FMT_OVERRIDE { + container_.resize(capacity); + this->set(&container_[0], capacity); + } + + public: + explicit container_buffer(Container& c) + : buffer(c.size()), container_(c) {} +}; + +// Extracts a reference to the container from back_insert_iterator. +template +inline Container& get_container(std::back_insert_iterator it) { + using bi_iterator = std::back_insert_iterator; + struct accessor : bi_iterator { + accessor(bi_iterator iter) : bi_iterator(iter) {} + using bi_iterator::container; + }; + return *accessor(it).container; +} + +template +struct fallback_formatter { + fallback_formatter() = delete; +}; + +// Specifies if T has an enabled fallback_formatter specialization. +template +using has_fallback_formatter = + std::is_constructible>; + +template struct named_arg_base; +template struct named_arg; + +enum class type { + none_type, + named_arg_type, + // Integer types should go first, + int_type, + uint_type, + long_long_type, + ulong_long_type, + int128_type, + uint128_type, + bool_type, + char_type, + last_integer_type = char_type, + // followed by floating-point types. + float_type, + double_type, + long_double_type, + last_numeric_type = long_double_type, + cstring_type, + string_type, + pointer_type, + custom_type +}; + +// Maps core type T to the corresponding type enum constant. +template +struct type_constant : std::integral_constant {}; + +#define FMT_TYPE_CONSTANT(Type, constant) \ + template \ + struct type_constant \ + : std::integral_constant {} + +FMT_TYPE_CONSTANT(const named_arg_base&, named_arg_type); +FMT_TYPE_CONSTANT(int, int_type); +FMT_TYPE_CONSTANT(unsigned, uint_type); +FMT_TYPE_CONSTANT(long long, long_long_type); +FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type); +FMT_TYPE_CONSTANT(int128_t, int128_type); +FMT_TYPE_CONSTANT(uint128_t, uint128_type); +FMT_TYPE_CONSTANT(bool, bool_type); +FMT_TYPE_CONSTANT(Char, char_type); +FMT_TYPE_CONSTANT(float, float_type); +FMT_TYPE_CONSTANT(double, double_type); +FMT_TYPE_CONSTANT(long double, long_double_type); +FMT_TYPE_CONSTANT(const Char*, cstring_type); +FMT_TYPE_CONSTANT(basic_string_view, string_type); +FMT_TYPE_CONSTANT(const void*, pointer_type); + +FMT_CONSTEXPR bool is_integral_type(type t) { + FMT_ASSERT(t != type::named_arg_type, "invalid argument type"); + return t > type::none_type && t <= type::last_integer_type; +} + +FMT_CONSTEXPR bool is_arithmetic_type(type t) { + FMT_ASSERT(t != type::named_arg_type, "invalid argument type"); + return t > type::none_type && t <= type::last_numeric_type; +} + +template struct string_value { + const Char* data; + std::size_t size; +}; + +template struct custom_value { + using parse_context = basic_format_parse_context; + const void* value; + void (*format)(const void* arg, parse_context& parse_ctx, Context& ctx); +}; + +// A formatting argument value. +template class value { + public: + using char_type = typename Context::char_type; + + union { + int int_value; + unsigned uint_value; + long long long_long_value; + unsigned long long ulong_long_value; + int128_t int128_value; + uint128_t uint128_value; + bool bool_value; + char_type char_value; + float float_value; + double double_value; + long double long_double_value; + const void* pointer; + string_value string; + custom_value custom; + const named_arg_base* named_arg; + }; + + FMT_CONSTEXPR value(int val = 0) : int_value(val) {} + FMT_CONSTEXPR value(unsigned val) : uint_value(val) {} + value(long long val) : long_long_value(val) {} + value(unsigned long long val) : ulong_long_value(val) {} + value(int128_t val) : int128_value(val) {} + value(uint128_t val) : uint128_value(val) {} + value(float val) : float_value(val) {} + value(double val) : double_value(val) {} + value(long double val) : long_double_value(val) {} + value(bool val) : bool_value(val) {} + value(char_type val) : char_value(val) {} + value(const char_type* val) { string.data = val; } + value(basic_string_view val) { + string.data = val.data(); + string.size = val.size(); + } + value(const void* val) : pointer(val) {} + + template value(const T& val) { + custom.value = &val; + // Get the formatter type through the context to allow different contexts + // have different extension points, e.g. `formatter` for `format` and + // `printf_formatter` for `printf`. + custom.format = format_custom_arg< + T, conditional_t::value, + typename Context::template formatter_type, + fallback_formatter>>; + } + + value(const named_arg_base& val) { named_arg = &val; } + + private: + // Formats an argument of a custom type, such as a user-defined class. + template + static void format_custom_arg( + const void* arg, basic_format_parse_context& parse_ctx, + Context& ctx) { + Formatter f; + parse_ctx.advance_to(f.parse(parse_ctx)); + ctx.advance_to(f.format(*static_cast(arg), ctx)); + } +}; + +template +FMT_CONSTEXPR basic_format_arg make_arg(const T& value); + +// To minimize the number of types we need to deal with, long is translated +// either to int or to long long depending on its size. +enum { long_short = sizeof(long) == sizeof(int) }; +using long_type = conditional_t; +using ulong_type = conditional_t; + +// Maps formatting arguments to core types. +template struct arg_mapper { + using char_type = typename Context::char_type; + + FMT_CONSTEXPR int map(signed char val) { return val; } + FMT_CONSTEXPR unsigned map(unsigned char val) { return val; } + FMT_CONSTEXPR int map(short val) { return val; } + FMT_CONSTEXPR unsigned map(unsigned short val) { return val; } + FMT_CONSTEXPR int map(int val) { return val; } + FMT_CONSTEXPR unsigned map(unsigned val) { return val; } + FMT_CONSTEXPR long_type map(long val) { return val; } + FMT_CONSTEXPR ulong_type map(unsigned long val) { return val; } + FMT_CONSTEXPR long long map(long long val) { return val; } + FMT_CONSTEXPR unsigned long long map(unsigned long long val) { return val; } + FMT_CONSTEXPR int128_t map(int128_t val) { return val; } + FMT_CONSTEXPR uint128_t map(uint128_t val) { return val; } + FMT_CONSTEXPR bool map(bool val) { return val; } + + template ::value)> + FMT_CONSTEXPR char_type map(T val) { + static_assert( + std::is_same::value || std::is_same::value, + "mixing character types is disallowed"); + return val; + } + + FMT_CONSTEXPR float map(float val) { return val; } + FMT_CONSTEXPR double map(double val) { return val; } + FMT_CONSTEXPR long double map(long double val) { return val; } + + FMT_CONSTEXPR const char_type* map(char_type* val) { return val; } + FMT_CONSTEXPR const char_type* map(const char_type* val) { return val; } + template ::value)> + FMT_CONSTEXPR basic_string_view map(const T& val) { + static_assert(std::is_same>::value, + "mixing character types is disallowed"); + return to_string_view(val); + } + template , T>::value && + !is_string::value && !has_formatter::value && + !has_fallback_formatter::value)> + FMT_CONSTEXPR basic_string_view map(const T& val) { + return basic_string_view(val); + } + template < + typename T, + FMT_ENABLE_IF( + std::is_constructible, T>::value && + !std::is_constructible, T>::value && + !is_string::value && !has_formatter::value && + !has_fallback_formatter::value)> + FMT_CONSTEXPR basic_string_view map(const T& val) { + return std_string_view(val); + } + FMT_CONSTEXPR const char* map(const signed char* val) { + static_assert(std::is_same::value, "invalid string type"); + return reinterpret_cast(val); + } + FMT_CONSTEXPR const char* map(const unsigned char* val) { + static_assert(std::is_same::value, "invalid string type"); + return reinterpret_cast(val); + } + + FMT_CONSTEXPR const void* map(void* val) { return val; } + FMT_CONSTEXPR const void* map(const void* val) { return val; } + FMT_CONSTEXPR const void* map(std::nullptr_t val) { return val; } + template FMT_CONSTEXPR int map(const T*) { + // Formatting of arbitrary pointers is disallowed. If you want to output + // a pointer cast it to "void *" or "const void *". In particular, this + // forbids formatting of "[const] volatile char *" which is printed as bool + // by iostreams. + static_assert(!sizeof(T), "formatting of non-void pointers is disallowed"); + return 0; + } + + template ::value && + !has_formatter::value && + !has_fallback_formatter::value)> + FMT_CONSTEXPR auto map(const T& val) + -> decltype(std::declval().map( + static_cast::type>(val))) { + return map(static_cast::type>(val)); + } + template ::value && !is_char::value && + (has_formatter::value || + has_fallback_formatter::value))> + FMT_CONSTEXPR const T& map(const T& val) { + return val; + } + + template + FMT_CONSTEXPR const named_arg_base& map( + const named_arg& val) { + auto arg = make_arg(val.value); + std::memcpy(val.data, &arg, sizeof(arg)); + return val; + } + + int map(...) { + constexpr bool formattable = sizeof(Context) == 0; + static_assert( + formattable, + "Cannot format argument. To make type T formattable provide a " + "formatter specialization: " + "https://fmt.dev/latest/api.html#formatting-user-defined-types"); + return 0; + } +}; + +// A type constant after applying arg_mapper. +template +using mapped_type_constant = + type_constant().map(std::declval())), + typename Context::char_type>; + +enum { packed_arg_bits = 5 }; +// Maximum number of arguments with packed types. +enum { max_packed_args = 63 / packed_arg_bits }; +enum : unsigned long long { is_unpacked_bit = 1ULL << 63 }; + +template class arg_map; +} // namespace internal + +// A formatting argument. It is a trivially copyable/constructible type to +// allow storage in basic_memory_buffer. +template class basic_format_arg { + private: + internal::value value_; + internal::type type_; + + template + friend FMT_CONSTEXPR basic_format_arg internal::make_arg( + const T& value); + + template + friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis, + const basic_format_arg& arg) + -> decltype(vis(0)); + + friend class basic_format_args; + friend class internal::arg_map; + + using char_type = typename Context::char_type; + + public: + class handle { + public: + explicit handle(internal::custom_value custom) : custom_(custom) {} + + void format(basic_format_parse_context& parse_ctx, + Context& ctx) const { + custom_.format(custom_.value, parse_ctx, ctx); + } + + private: + internal::custom_value custom_; + }; + + FMT_CONSTEXPR basic_format_arg() : type_(internal::type::none_type) {} + + FMT_CONSTEXPR explicit operator bool() const FMT_NOEXCEPT { + return type_ != internal::type::none_type; + } + + internal::type type() const { return type_; } + + bool is_integral() const { return internal::is_integral_type(type_); } + bool is_arithmetic() const { return internal::is_arithmetic_type(type_); } +}; + +/** + \rst + Visits an argument dispatching to the appropriate visit method based on + the argument type. For example, if the argument type is ``double`` then + ``vis(value)`` will be called with the value of type ``double``. + \endrst + */ +template +FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis, + const basic_format_arg& arg) + -> decltype(vis(0)) { + using char_type = typename Context::char_type; + switch (arg.type_) { + case internal::type::none_type: + break; + case internal::type::named_arg_type: + FMT_ASSERT(false, "invalid argument type"); + break; + case internal::type::int_type: + return vis(arg.value_.int_value); + case internal::type::uint_type: + return vis(arg.value_.uint_value); + case internal::type::long_long_type: + return vis(arg.value_.long_long_value); + case internal::type::ulong_long_type: + return vis(arg.value_.ulong_long_value); +#if FMT_USE_INT128 + case internal::type::int128_type: + return vis(arg.value_.int128_value); + case internal::type::uint128_type: + return vis(arg.value_.uint128_value); +#else + case internal::type::int128_type: + case internal::type::uint128_type: + break; +#endif + case internal::type::bool_type: + return vis(arg.value_.bool_value); + case internal::type::char_type: + return vis(arg.value_.char_value); + case internal::type::float_type: + return vis(arg.value_.float_value); + case internal::type::double_type: + return vis(arg.value_.double_value); + case internal::type::long_double_type: + return vis(arg.value_.long_double_value); + case internal::type::cstring_type: + return vis(arg.value_.string.data); + case internal::type::string_type: + return vis(basic_string_view(arg.value_.string.data, + arg.value_.string.size)); + case internal::type::pointer_type: + return vis(arg.value_.pointer); + case internal::type::custom_type: + return vis(typename basic_format_arg::handle(arg.value_.custom)); + } + return vis(monostate()); +} + +namespace internal { +// A map from argument names to their values for named arguments. +template class arg_map { + private: + using char_type = typename Context::char_type; + + struct entry { + basic_string_view name; + basic_format_arg arg; + }; + + entry* map_; + unsigned size_; + + void push_back(value val) { + const auto& named = *val.named_arg; + map_[size_] = {named.name, named.template deserialize()}; + ++size_; + } + + public: + arg_map(const arg_map&) = delete; + void operator=(const arg_map&) = delete; + arg_map() : map_(nullptr), size_(0) {} + void init(const basic_format_args& args); + ~arg_map() { delete[] map_; } + + basic_format_arg find(basic_string_view name) const { + // The list is unsorted, so just return the first matching name. + for (entry *it = map_, *end = map_ + size_; it != end; ++it) { + if (it->name == name) return it->arg; + } + return {}; + } +}; + +// A type-erased reference to an std::locale to avoid heavy include. +class locale_ref { + private: + const void* locale_; // A type-erased pointer to std::locale. + + public: + locale_ref() : locale_(nullptr) {} + template explicit locale_ref(const Locale& loc); + + explicit operator bool() const FMT_NOEXCEPT { return locale_ != nullptr; } + + template Locale get() const; +}; + +template constexpr unsigned long long encode_types() { return 0; } + +template +constexpr unsigned long long encode_types() { + return static_cast(mapped_type_constant::value) | + (encode_types() << packed_arg_bits); +} + +template +FMT_CONSTEXPR basic_format_arg make_arg(const T& value) { + basic_format_arg arg; + arg.type_ = mapped_type_constant::value; + arg.value_ = arg_mapper().map(value); + return arg; +} + +template +inline value make_arg(const T& val) { + return arg_mapper().map(val); +} + +template +inline basic_format_arg make_arg(const T& value) { + return make_arg(value); +} + +template struct is_reference_wrapper : std::false_type {}; + +template +struct is_reference_wrapper> : std::true_type {}; + +class dynamic_arg_list { + // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for + // templates it doesn't complain about inability to deduce single translation + // unit for placing vtable. So storage_node_base is made a fake template. + template struct node { + virtual ~node() = default; + std::unique_ptr> next; + }; + + template struct typed_node : node<> { + T value; + + template + FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {} + + template + FMT_CONSTEXPR typed_node(const basic_string_view& arg) + : value(arg.data(), arg.size()) {} + }; + + std::unique_ptr> head_; + + public: + template const T& push(const Arg& arg) { + auto node = std::unique_ptr>(new typed_node(arg)); + auto& value = node->value; + node->next = std::move(head_); + head_ = std::move(node); + return value; + } +}; +} // namespace internal + +// Formatting context. +template class basic_format_context { + public: + /** The character type for the output. */ + using char_type = Char; + + private: + OutputIt out_; + basic_format_args args_; + internal::arg_map map_; + internal::locale_ref loc_; + + public: + using iterator = OutputIt; + using format_arg = basic_format_arg; + template using formatter_type = formatter; + + basic_format_context(const basic_format_context&) = delete; + void operator=(const basic_format_context&) = delete; + /** + Constructs a ``basic_format_context`` object. References to the arguments are + stored in the object so make sure they have appropriate lifetimes. + */ + basic_format_context(OutputIt out, + basic_format_args ctx_args, + internal::locale_ref loc = internal::locale_ref()) + : out_(out), args_(ctx_args), loc_(loc) {} + + format_arg arg(int id) const { return args_.get(id); } + + // Checks if manual indexing is used and returns the argument with the + // specified name. + format_arg arg(basic_string_view name); + + internal::error_handler error_handler() { return {}; } + void on_error(const char* message) { error_handler().on_error(message); } + + // Returns an iterator to the beginning of the output range. + iterator out() { return out_; } + + // Advances the begin iterator to ``it``. + void advance_to(iterator it) { out_ = it; } + + internal::locale_ref locale() { return loc_; } +}; + +template +using buffer_context = + basic_format_context>, + Char>; +using format_context = buffer_context; +using wformat_context = buffer_context; + +/** + \rst + An array of references to arguments. It can be implicitly converted into + `~fmt::basic_format_args` for passing into type-erased formatting functions + such as `~fmt::vformat`. + \endrst + */ +template +class format_arg_store +#if FMT_GCC_VERSION < 409 + // Workaround a GCC template argument substitution bug. + : public basic_format_args +#endif +{ + private: + static const size_t num_args = sizeof...(Args); + static const bool is_packed = num_args < internal::max_packed_args; + + using value_type = conditional_t, + basic_format_arg>; + + // If the arguments are not packed, add one more element to mark the end. + value_type data_[num_args + (num_args == 0 ? 1 : 0)]; + + friend class basic_format_args; + + public: + static constexpr unsigned long long types = + is_packed ? internal::encode_types() + : internal::is_unpacked_bit | num_args; + + format_arg_store(const Args&... args) + : +#if FMT_GCC_VERSION < 409 + basic_format_args(*this), +#endif + data_{internal::make_arg(args)...} { + } +}; + +/** + \rst + Constructs an `~fmt::format_arg_store` object that contains references to + arguments and can be implicitly converted to `~fmt::format_args`. `Context` + can be omitted in which case it defaults to `~fmt::context`. + See `~fmt::arg` for lifetime considerations. + \endrst + */ +template +inline format_arg_store make_format_args( + const Args&... args) { + return {args...}; +} + +/** + \rst + A dynamic version of `fmt::format_arg_store<>`. + It's equipped with a storage to potentially temporary objects which lifetime + could be shorter than the format arguments object. + + It can be implicitly converted into `~fmt::basic_format_args` for passing + into type-erased formatting functions such as `~fmt::vformat`. + \endrst + */ +template +class dynamic_format_arg_store +#if FMT_GCC_VERSION < 409 + // Workaround a GCC template argument substitution bug. + : public basic_format_args +#endif +{ + private: + using char_type = typename Context::char_type; + + template struct need_copy { + static constexpr internal::type mapped_type = + internal::mapped_type_constant::value; + + enum { + value = !(internal::is_reference_wrapper::value || + std::is_same>::value || + std::is_same>::value || + (mapped_type != internal::type::cstring_type && + mapped_type != internal::type::string_type && + mapped_type != internal::type::custom_type && + mapped_type != internal::type::named_arg_type)) + }; + }; + + template + using stored_type = conditional_t::value, + std::basic_string, T>; + + // Storage of basic_format_arg must be contiguous. + std::vector> data_; + + // Storage of arguments not fitting into basic_format_arg must grow + // without relocation because items in data_ refer to it. + internal::dynamic_arg_list dynamic_args_; + + friend class basic_format_args; + + unsigned long long get_types() const { + return internal::is_unpacked_bit | data_.size(); + } + + template void emplace_arg(const T& arg) { + data_.emplace_back(internal::make_arg(arg)); + } + + public: + /** + \rst + Adds an argument into the dynamic store for later passing to a formating + function. + + Note that custom types and string types (but not string views!) are copied + into the store with dynamic memory (in addition to resizing vector). + + **Example**:: + + fmt::dynamic_format_arg_store store; + store.push_back(42); + store.push_back("abc"); + store.push_back(1.5f); + std::string result = fmt::vformat("{} and {} and {}", store); + \endrst + */ + template void push_back(const T& arg) { + static_assert( + !std::is_base_of, T>::value, + "named arguments are not supported yet"); + if (internal::const_check(need_copy::value)) + emplace_arg(dynamic_args_.push>(arg)); + else + emplace_arg(arg); + } + + /** + Adds a reference to the argument into the dynamic store for later passing to + a formating function. + */ + template void push_back(std::reference_wrapper arg) { + static_assert( + need_copy::value, + "objects of built-in types and string views are always copied"); + emplace_arg(arg.get()); + } +}; + +/** + \rst + A view of a collection of formatting arguments. To avoid lifetime issues it + should only be used as a parameter type in type-erased functions such as + ``vformat``:: + + void vlog(string_view format_str, format_args args); // OK + format_args args = make_format_args(42); // Error: dangling reference + \endrst + */ +template class basic_format_args { + public: + using size_type = int; + using format_arg = basic_format_arg; + + private: + // To reduce compiled code size per formatting function call, types of first + // max_packed_args arguments are passed in the types_ field. + unsigned long long types_; + union { + // If the number of arguments is less than max_packed_args, the argument + // values are stored in values_, otherwise they are stored in args_. + // This is done to reduce compiled code size as storing larger objects + // may require more code (at least on x86-64) even if the same amount of + // data is actually copied to stack. It saves ~10% on the bloat test. + const internal::value* values_; + const format_arg* args_; + }; + + bool is_packed() const { return (types_ & internal::is_unpacked_bit) == 0; } + + internal::type type(int index) const { + int shift = index * internal::packed_arg_bits; + unsigned int mask = (1 << internal::packed_arg_bits) - 1; + return static_cast((types_ >> shift) & mask); + } + + friend class internal::arg_map; + + void set_data(const internal::value* values) { values_ = values; } + void set_data(const format_arg* args) { args_ = args; } + + format_arg do_get(int index) const { + format_arg arg; + if (!is_packed()) { + auto num_args = max_size(); + if (index < num_args) arg = args_[index]; + return arg; + } + if (index > internal::max_packed_args) return arg; + arg.type_ = type(index); + if (arg.type_ == internal::type::none_type) return arg; + internal::value& val = arg.value_; + val = values_[index]; + return arg; + } + + public: + basic_format_args() : types_(0) {} + + /** + \rst + Constructs a `basic_format_args` object from `~fmt::format_arg_store`. + \endrst + */ + template + basic_format_args(const format_arg_store& store) + : types_(store.types) { + set_data(store.data_); + } + + /** + \rst + Constructs a `basic_format_args` object from + `~fmt::dynamic_format_arg_store`. + \endrst + */ + basic_format_args(const dynamic_format_arg_store& store) + : types_(store.get_types()) { + set_data(store.data_.data()); + } + + /** + \rst + Constructs a `basic_format_args` object from a dynamic set of arguments. + \endrst + */ + basic_format_args(const format_arg* args, int count) + : types_(internal::is_unpacked_bit | internal::to_unsigned(count)) { + set_data(args); + } + + /** Returns the argument at specified index. */ + format_arg get(int index) const { + format_arg arg = do_get(index); + if (arg.type_ == internal::type::named_arg_type) + arg = arg.value_.named_arg->template deserialize(); + return arg; + } + + int max_size() const { + unsigned long long max_packed = internal::max_packed_args; + return static_cast(is_packed() ? max_packed + : types_ & ~internal::is_unpacked_bit); + } +}; + +/** An alias to ``basic_format_args``. */ +// It is a separate type rather than an alias to make symbols readable. +struct format_args : basic_format_args { + template + format_args(Args&&... args) + : basic_format_args(static_cast(args)...) {} +}; +struct wformat_args : basic_format_args { + template + wformat_args(Args&&... args) + : basic_format_args(static_cast(args)...) {} +}; + +template struct is_contiguous : std::false_type {}; + +template +struct is_contiguous> : std::true_type {}; + +template +struct is_contiguous> : std::true_type {}; + +namespace internal { + +template +struct is_contiguous_back_insert_iterator : std::false_type {}; +template +struct is_contiguous_back_insert_iterator> + : is_contiguous {}; + +template struct named_arg_base { + basic_string_view name; + + // Serialized value. + mutable char data[sizeof(basic_format_arg>)]; + + named_arg_base(basic_string_view nm) : name(nm) {} + + template basic_format_arg deserialize() const { + basic_format_arg arg; + std::memcpy(&arg, data, sizeof(basic_format_arg)); + return arg; + } +}; + +struct view {}; + +template +struct named_arg : view, named_arg_base { + const T& value; + + named_arg(basic_string_view name, const T& val) + : named_arg_base(name), value(val) {} +}; + +template ::value)> +inline void check_format_string(const S&) { +#if defined(FMT_ENFORCE_COMPILE_STRING) + static_assert(is_compile_string::value, + "FMT_ENFORCE_COMPILE_STRING requires all format strings to " + "utilize FMT_STRING() or fmt()."); +#endif +} +template ::value)> +void check_format_string(S); + +template struct bool_pack; +template +using all_true = + std::is_same, bool_pack>; + +template > +inline format_arg_store, remove_reference_t...> +make_args_checked(const S& format_str, + const remove_reference_t&... args) { + static_assert( + all_true<(!std::is_base_of>::value || + !std::is_reference::value)...>::value, + "passing views as lvalues is disallowed"); + check_format_string(format_str); + return {args...}; +} + +template +std::basic_string vformat( + basic_string_view format_str, + basic_format_args>> args); + +template +typename buffer_context::iterator vformat_to( + buffer& buf, basic_string_view format_str, + basic_format_args>> args); + +FMT_API void vprint_mojibake(std::FILE*, string_view, format_args); + +#ifndef _WIN32 +inline void vprint_mojibake(std::FILE*, string_view, format_args) {} +#endif +} // namespace internal + +/** + \rst + Returns a named argument to be used in a formatting function. It should only + be used in a call to a formatting function. + + **Example**:: + + fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23)); + \endrst + */ +template > +inline internal::named_arg arg(const S& name, const T& arg) { + static_assert(internal::is_string::value, ""); + return {name, arg}; +} + +// Disable nested named arguments, e.g. ``arg("a", arg("b", 42))``. +template +void arg(S, internal::named_arg) = delete; + +/** Formats a string and writes the output to ``out``. */ +// GCC 8 and earlier cannot handle std::back_insert_iterator with +// vformat_to(...) overload, so SFINAE on iterator type instead. +template , + FMT_ENABLE_IF( + internal::is_contiguous_back_insert_iterator::value)> +OutputIt vformat_to( + OutputIt out, const S& format_str, + basic_format_args>> args) { + using container = remove_reference_t; + internal::container_buffer buf((internal::get_container(out))); + internal::vformat_to(buf, to_string_view(format_str), args); + return out; +} + +template ::value&& internal::is_string::value)> +inline std::back_insert_iterator format_to( + std::back_insert_iterator out, const S& format_str, + Args&&... args) { + return vformat_to(out, to_string_view(format_str), + internal::make_args_checked(format_str, args...)); +} + +template > +inline std::basic_string vformat( + const S& format_str, + basic_format_args>> args) { + return internal::vformat(to_string_view(format_str), args); +} + +/** + \rst + Formats arguments and returns the result as a string. + + **Example**:: + + #include + std::string message = fmt::format("The answer is {}", 42); + \endrst +*/ +// Pass char_t as a default template parameter instead of using +// std::basic_string> to reduce the symbol size. +template > +inline std::basic_string format(const S& format_str, Args&&... args) { + return internal::vformat( + to_string_view(format_str), + internal::make_args_checked(format_str, args...)); +} + +FMT_API void vprint(string_view, format_args); +FMT_API void vprint(std::FILE*, string_view, format_args); + +/** + \rst + Formats ``args`` according to specifications in ``format_str`` and writes the + output to the file ``f``. Strings are assumed to be Unicode-encoded unless the + ``FMT_UNICODE`` macro is set to 0. + + **Example**:: + + fmt::print(stderr, "Don't {}!", "panic"); + \endrst + */ +template ::value)> +inline void print(std::FILE* f, const S& format_str, Args&&... args) { + return internal::is_utf8() + ? vprint(f, to_string_view(format_str), + internal::make_args_checked(format_str, args...)) + : internal::vprint_mojibake( + f, to_string_view(format_str), + internal::make_args_checked(format_str, args...)); +} + +/** + \rst + Formats ``args`` according to specifications in ``format_str`` and writes + the output to ``stdout``. Strings are assumed to be Unicode-encoded unless + the ``FMT_UNICODE`` macro is set to 0. + + **Example**:: + + fmt::print("Elapsed time: {0:.2f} seconds", 1.23); + \endrst + */ +template ::value)> +inline void print(const S& format_str, Args&&... args) { + return internal::is_utf8() + ? vprint(to_string_view(format_str), + internal::make_args_checked(format_str, args...)) + : internal::vprint_mojibake( + stdout, to_string_view(format_str), + internal::make_args_checked(format_str, args...)); +} +FMT_END_NAMESPACE + +#endif // FMT_CORE_H_ Index: libraries/source/fmt/include/fmt/format-inl.h =================================================================== --- /dev/null +++ libraries/source/fmt/include/fmt/format-inl.h @@ -0,0 +1,1403 @@ +// Formatting library for C++ - implementation +// +// Copyright (c) 2012 - 2016, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#ifndef FMT_FORMAT_INL_H_ +#define FMT_FORMAT_INL_H_ + +#include +#include +#include +#include +#include +#include // for std::memmove +#include + +#include "format.h" +#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR) +# include +#endif + +#ifdef _WIN32 +# include +# include +#endif + +#ifdef _MSC_VER +# pragma warning(push) +# pragma warning(disable : 4702) // unreachable code +#endif + +// Dummy implementations of strerror_r and strerror_s called if corresponding +// system functions are not available. +inline fmt::internal::null<> strerror_r(int, char*, ...) { return {}; } +inline fmt::internal::null<> strerror_s(char*, std::size_t, ...) { return {}; } + +FMT_BEGIN_NAMESPACE +namespace internal { + +FMT_FUNC void assert_fail(const char* file, int line, const char* message) { + print(stderr, "{}:{}: assertion failed: {}", file, line, message); + std::abort(); +} + +#ifndef _MSC_VER +# define FMT_SNPRINTF snprintf +#else // _MSC_VER +inline int fmt_snprintf(char* buffer, size_t size, const char* format, ...) { + va_list args; + va_start(args, format); + int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args); + va_end(args); + return result; +} +# define FMT_SNPRINTF fmt_snprintf +#endif // _MSC_VER + +// A portable thread-safe version of strerror. +// Sets buffer to point to a string describing the error code. +// This can be either a pointer to a string stored in buffer, +// or a pointer to some static immutable string. +// Returns one of the following values: +// 0 - success +// ERANGE - buffer is not large enough to store the error message +// other - failure +// Buffer should be at least of size 1. +FMT_FUNC int safe_strerror(int error_code, char*& buffer, + std::size_t buffer_size) FMT_NOEXCEPT { + FMT_ASSERT(buffer != nullptr && buffer_size != 0, "invalid buffer"); + + class dispatcher { + private: + int error_code_; + char*& buffer_; + std::size_t buffer_size_; + + // A noop assignment operator to avoid bogus warnings. + void operator=(const dispatcher&) {} + + // Handle the result of XSI-compliant version of strerror_r. + int handle(int result) { + // glibc versions before 2.13 return result in errno. + return result == -1 ? errno : result; + } + + // Handle the result of GNU-specific version of strerror_r. + FMT_MAYBE_UNUSED + int handle(char* message) { + // If the buffer is full then the message is probably truncated. + if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1) + return ERANGE; + buffer_ = message; + return 0; + } + + // Handle the case when strerror_r is not available. + FMT_MAYBE_UNUSED + int handle(internal::null<>) { + return fallback(strerror_s(buffer_, buffer_size_, error_code_)); + } + + // Fallback to strerror_s when strerror_r is not available. + FMT_MAYBE_UNUSED + int fallback(int result) { + // If the buffer is full then the message is probably truncated. + return result == 0 && strlen(buffer_) == buffer_size_ - 1 ? ERANGE + : result; + } + +#if !FMT_MSC_VER + // Fallback to strerror if strerror_r and strerror_s are not available. + int fallback(internal::null<>) { + errno = 0; + buffer_ = strerror(error_code_); + return errno; + } +#endif + + public: + dispatcher(int err_code, char*& buf, std::size_t buf_size) + : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {} + + int run() { return handle(strerror_r(error_code_, buffer_, buffer_size_)); } + }; + return dispatcher(error_code, buffer, buffer_size).run(); +} + +FMT_FUNC void format_error_code(internal::buffer& out, int error_code, + string_view message) FMT_NOEXCEPT { + // Report error code making sure that the output fits into + // inline_buffer_size to avoid dynamic memory allocation and potential + // bad_alloc. + out.resize(0); + static const char SEP[] = ": "; + static const char ERROR_STR[] = "error "; + // Subtract 2 to account for terminating null characters in SEP and ERROR_STR. + std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2; + auto abs_value = static_cast>(error_code); + if (internal::is_negative(error_code)) { + abs_value = 0 - abs_value; + ++error_code_size; + } + error_code_size += internal::to_unsigned(internal::count_digits(abs_value)); + internal::writer w(out); + if (message.size() <= inline_buffer_size - error_code_size) { + w.write(message); + w.write(SEP); + } + w.write(ERROR_STR); + w.write(error_code); + assert(out.size() <= inline_buffer_size); +} + +FMT_FUNC void report_error(format_func func, int error_code, + string_view message) FMT_NOEXCEPT { + memory_buffer full_message; + func(full_message, error_code, message); + // Don't use fwrite_fully because the latter may throw. + (void)std::fwrite(full_message.data(), full_message.size(), 1, stderr); + std::fputc('\n', stderr); +} + +// A wrapper around fwrite that throws on error. +FMT_FUNC void fwrite_fully(const void* ptr, size_t size, size_t count, + FILE* stream) { + size_t written = std::fwrite(ptr, size, count, stream); + if (written < count) FMT_THROW(system_error(errno, "cannot write to file")); +} +} // namespace internal + +#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR) +namespace internal { + +template +locale_ref::locale_ref(const Locale& loc) : locale_(&loc) { + static_assert(std::is_same::value, ""); +} + +template Locale locale_ref::get() const { + static_assert(std::is_same::value, ""); + return locale_ ? *static_cast(locale_) : std::locale(); +} + +template FMT_FUNC std::string grouping_impl(locale_ref loc) { + return std::use_facet>(loc.get()).grouping(); +} +template FMT_FUNC Char thousands_sep_impl(locale_ref loc) { + return std::use_facet>(loc.get()) + .thousands_sep(); +} +template FMT_FUNC Char decimal_point_impl(locale_ref loc) { + return std::use_facet>(loc.get()) + .decimal_point(); +} +} // namespace internal +#else +template +FMT_FUNC std::string internal::grouping_impl(locale_ref) { + return "\03"; +} +template +FMT_FUNC Char internal::thousands_sep_impl(locale_ref) { + return FMT_STATIC_THOUSANDS_SEPARATOR; +} +template +FMT_FUNC Char internal::decimal_point_impl(locale_ref) { + return '.'; +} +#endif + +FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT = default; +FMT_API FMT_FUNC system_error::~system_error() FMT_NOEXCEPT = default; + +FMT_FUNC void system_error::init(int err_code, string_view format_str, + format_args args) { + error_code_ = err_code; + memory_buffer buffer; + format_system_error(buffer, err_code, vformat(format_str, args)); + std::runtime_error& base = *this; + base = std::runtime_error(to_string(buffer)); +} + +namespace internal { + +template <> FMT_FUNC int count_digits<4>(internal::fallback_uintptr n) { + // fallback_uintptr is always stored in little endian. + int i = static_cast(sizeof(void*)) - 1; + while (i > 0 && n.value[i] == 0) --i; + auto char_digits = std::numeric_limits::digits / 4; + return i >= 0 ? i * char_digits + count_digits<4, unsigned>(n.value[i]) : 1; +} + +template +const char basic_data::digits[] = + "0001020304050607080910111213141516171819" + "2021222324252627282930313233343536373839" + "4041424344454647484950515253545556575859" + "6061626364656667686970717273747576777879" + "8081828384858687888990919293949596979899"; + +template +const char basic_data::hex_digits[] = "0123456789abcdef"; + +#define FMT_POWERS_OF_10(factor) \ + factor * 10, (factor)*100, (factor)*1000, (factor)*10000, (factor)*100000, \ + (factor)*1000000, (factor)*10000000, (factor)*100000000, \ + (factor)*1000000000 + +template +const uint64_t basic_data::powers_of_10_64[] = { + 1, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ULL), + 10000000000000000000ULL}; + +template +const uint32_t basic_data::zero_or_powers_of_10_32[] = {0, + FMT_POWERS_OF_10(1)}; + +template +const uint64_t basic_data::zero_or_powers_of_10_64[] = { + 0, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ULL), + 10000000000000000000ULL}; + +// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340. +// These are generated by support/compute-powers.py. +template +const uint64_t basic_data::pow10_significands[] = { + 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76, + 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df, + 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c, + 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5, + 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57, + 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7, + 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e, + 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996, + 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126, + 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053, + 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f, + 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b, + 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06, + 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb, + 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000, + 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984, + 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068, + 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8, + 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758, + 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85, + 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d, + 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25, + 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2, + 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a, + 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410, + 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129, + 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85, + 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841, + 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b, +}; + +// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding +// to significands above. +template +const int16_t basic_data::pow10_exponents[] = { + -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954, + -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661, + -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369, + -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77, + -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216, + 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508, + 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800, + 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066}; + +template +const char basic_data::foreground_color[] = "\x1b[38;2;"; +template +const char basic_data::background_color[] = "\x1b[48;2;"; +template const char basic_data::reset_color[] = "\x1b[0m"; +template const wchar_t basic_data::wreset_color[] = L"\x1b[0m"; +template const char basic_data::signs[] = {0, '-', '+', ' '}; + +template struct bits { + static FMT_CONSTEXPR_DECL const int value = + static_cast(sizeof(T) * std::numeric_limits::digits); +}; + +class fp; +template fp normalize(fp value); + +// Lower (upper) boundary is a value half way between a floating-point value +// and its predecessor (successor). Boundaries have the same exponent as the +// value so only significands are stored. +struct boundaries { + uint64_t lower; + uint64_t upper; +}; + +// A handmade floating-point number f * pow(2, e). +class fp { + private: + using significand_type = uint64_t; + + public: + significand_type f; + int e; + + // All sizes are in bits. + // Subtract 1 to account for an implicit most significant bit in the + // normalized form. + static FMT_CONSTEXPR_DECL const int double_significand_size = + std::numeric_limits::digits - 1; + static FMT_CONSTEXPR_DECL const uint64_t implicit_bit = + 1ULL << double_significand_size; + static FMT_CONSTEXPR_DECL const int significand_size = + bits::value; + + fp() : f(0), e(0) {} + fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {} + + // Constructs fp from an IEEE754 double. It is a template to prevent compile + // errors on platforms where double is not IEEE754. + template explicit fp(Double d) { assign(d); } + + // Assigns d to this and return true iff predecessor is closer than successor. + template + bool assign(Double d) { + // Assume double is in the format [sign][exponent][significand]. + using limits = std::numeric_limits; + const int exponent_size = + bits::value - double_significand_size - 1; // -1 for sign + const uint64_t significand_mask = implicit_bit - 1; + const uint64_t exponent_mask = (~0ULL >> 1) & ~significand_mask; + const int exponent_bias = (1 << exponent_size) - limits::max_exponent - 1; + auto u = bit_cast(d); + f = u & significand_mask; + int biased_e = + static_cast((u & exponent_mask) >> double_significand_size); + // Predecessor is closer if d is a normalized power of 2 (f == 0) other than + // the smallest normalized number (biased_e > 1). + bool is_predecessor_closer = f == 0 && biased_e > 1; + if (biased_e != 0) + f += implicit_bit; + else + biased_e = 1; // Subnormals use biased exponent 1 (min exponent). + e = biased_e - exponent_bias - double_significand_size; + return is_predecessor_closer; + } + + template + bool assign(Double) { + *this = fp(); + return false; + } + + // Assigns d to this together with computing lower and upper boundaries, + // where a boundary is a value half way between the number and its predecessor + // (lower) or successor (upper). The upper boundary is normalized and lower + // has the same exponent but may be not normalized. + template boundaries assign_with_boundaries(Double d) { + bool is_lower_closer = assign(d); + fp lower = + is_lower_closer ? fp((f << 2) - 1, e - 2) : fp((f << 1) - 1, e - 1); + // 1 in normalize accounts for the exponent shift above. + fp upper = normalize<1>(fp((f << 1) + 1, e - 1)); + lower.f <<= lower.e - upper.e; + return boundaries{lower.f, upper.f}; + } + + template boundaries assign_float_with_boundaries(Double d) { + assign(d); + constexpr int min_normal_e = std::numeric_limits::min_exponent - + std::numeric_limits::digits; + significand_type half_ulp = 1 << (std::numeric_limits::digits - + std::numeric_limits::digits - 1); + if (min_normal_e > e) half_ulp <<= min_normal_e - e; + fp upper = normalize<0>(fp(f + half_ulp, e)); + fp lower = fp( + f - (half_ulp >> ((f == implicit_bit && e > min_normal_e) ? 1 : 0)), e); + lower.f <<= lower.e - upper.e; + return boundaries{lower.f, upper.f}; + } +}; + +// Normalizes the value converted from double and multiplied by (1 << SHIFT). +template fp normalize(fp value) { + // Handle subnormals. + const auto shifted_implicit_bit = fp::implicit_bit << SHIFT; + while ((value.f & shifted_implicit_bit) == 0) { + value.f <<= 1; + --value.e; + } + // Subtract 1 to account for hidden bit. + const auto offset = + fp::significand_size - fp::double_significand_size - SHIFT - 1; + value.f <<= offset; + value.e -= offset; + return value; +} + +inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; } + +// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking. +inline uint64_t multiply(uint64_t lhs, uint64_t rhs) { +#if FMT_USE_INT128 + auto product = static_cast<__uint128_t>(lhs) * rhs; + auto f = static_cast(product >> 64); + return (static_cast(product) & (1ULL << 63)) != 0 ? f + 1 : f; +#else + // Multiply 32-bit parts of significands. + uint64_t mask = (1ULL << 32) - 1; + uint64_t a = lhs >> 32, b = lhs & mask; + uint64_t c = rhs >> 32, d = rhs & mask; + uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d; + // Compute mid 64-bit of result and round. + uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31); + return ac + (ad >> 32) + (bc >> 32) + (mid >> 32); +#endif +} + +inline fp operator*(fp x, fp y) { return {multiply(x.f, y.f), x.e + y.e + 64}; } + +// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its +// (binary) exponent satisfies `min_exponent <= c_k.e <= min_exponent + 28`. +inline fp get_cached_power(int min_exponent, int& pow10_exponent) { + const int64_t one_over_log2_10 = 0x4d104d42; // round(pow(2, 32) / log2(10)) + int index = static_cast( + ((min_exponent + fp::significand_size - 1) * one_over_log2_10 + + ((int64_t(1) << 32) - 1)) // ceil + >> 32 // arithmetic shift + ); + // Decimal exponent of the first (smallest) cached power of 10. + const int first_dec_exp = -348; + // Difference between 2 consecutive decimal exponents in cached powers of 10. + const int dec_exp_step = 8; + index = (index - first_dec_exp - 1) / dec_exp_step + 1; + pow10_exponent = first_dec_exp + index * dec_exp_step; + return {data::pow10_significands[index], data::pow10_exponents[index]}; +} + +// A simple accumulator to hold the sums of terms in bigint::square if uint128_t +// is not available. +struct accumulator { + uint64_t lower; + uint64_t upper; + + accumulator() : lower(0), upper(0) {} + explicit operator uint32_t() const { return static_cast(lower); } + + void operator+=(uint64_t n) { + lower += n; + if (lower < n) ++upper; + } + void operator>>=(int shift) { + assert(shift == 32); + (void)shift; + lower = (upper << 32) | (lower >> 32); + upper >>= 32; + } +}; + +class bigint { + private: + // A bigint is stored as an array of bigits (big digits), with bigit at index + // 0 being the least significant one. + using bigit = uint32_t; + using double_bigit = uint64_t; + enum { bigits_capacity = 32 }; + basic_memory_buffer bigits_; + int exp_; + + bigit operator[](int index) const { return bigits_[to_unsigned(index)]; } + bigit& operator[](int index) { return bigits_[to_unsigned(index)]; } + + static FMT_CONSTEXPR_DECL const int bigit_bits = bits::value; + + friend struct formatter; + + void subtract_bigits(int index, bigit other, bigit& borrow) { + auto result = static_cast((*this)[index]) - other - borrow; + (*this)[index] = static_cast(result); + borrow = static_cast(result >> (bigit_bits * 2 - 1)); + } + + void remove_leading_zeros() { + int num_bigits = static_cast(bigits_.size()) - 1; + while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits; + bigits_.resize(to_unsigned(num_bigits + 1)); + } + + // Computes *this -= other assuming aligned bigints and *this >= other. + void subtract_aligned(const bigint& other) { + FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints"); + FMT_ASSERT(compare(*this, other) >= 0, ""); + bigit borrow = 0; + int i = other.exp_ - exp_; + for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j) { + subtract_bigits(i, other.bigits_[j], borrow); + } + while (borrow > 0) subtract_bigits(i, 0, borrow); + remove_leading_zeros(); + } + + void multiply(uint32_t value) { + const double_bigit wide_value = value; + bigit carry = 0; + for (size_t i = 0, n = bigits_.size(); i < n; ++i) { + double_bigit result = bigits_[i] * wide_value + carry; + bigits_[i] = static_cast(result); + carry = static_cast(result >> bigit_bits); + } + if (carry != 0) bigits_.push_back(carry); + } + + void multiply(uint64_t value) { + const bigit mask = ~bigit(0); + const double_bigit lower = value & mask; + const double_bigit upper = value >> bigit_bits; + double_bigit carry = 0; + for (size_t i = 0, n = bigits_.size(); i < n; ++i) { + double_bigit result = bigits_[i] * lower + (carry & mask); + carry = + bigits_[i] * upper + (result >> bigit_bits) + (carry >> bigit_bits); + bigits_[i] = static_cast(result); + } + while (carry != 0) { + bigits_.push_back(carry & mask); + carry >>= bigit_bits; + } + } + + public: + bigint() : exp_(0) {} + explicit bigint(uint64_t n) { assign(n); } + ~bigint() { assert(bigits_.capacity() <= bigits_capacity); } + + bigint(const bigint&) = delete; + void operator=(const bigint&) = delete; + + void assign(const bigint& other) { + bigits_.resize(other.bigits_.size()); + auto data = other.bigits_.data(); + std::copy(data, data + other.bigits_.size(), bigits_.data()); + exp_ = other.exp_; + } + + void assign(uint64_t n) { + size_t num_bigits = 0; + do { + bigits_[num_bigits++] = n & ~bigit(0); + n >>= bigit_bits; + } while (n != 0); + bigits_.resize(num_bigits); + exp_ = 0; + } + + int num_bigits() const { return static_cast(bigits_.size()) + exp_; } + + bigint& operator<<=(int shift) { + assert(shift >= 0); + exp_ += shift / bigit_bits; + shift %= bigit_bits; + if (shift == 0) return *this; + bigit carry = 0; + for (size_t i = 0, n = bigits_.size(); i < n; ++i) { + bigit c = bigits_[i] >> (bigit_bits - shift); + bigits_[i] = (bigits_[i] << shift) + carry; + carry = c; + } + if (carry != 0) bigits_.push_back(carry); + return *this; + } + + template bigint& operator*=(Int value) { + FMT_ASSERT(value > 0, ""); + multiply(uint32_or_64_or_128_t(value)); + return *this; + } + + friend int compare(const bigint& lhs, const bigint& rhs) { + int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits(); + if (num_lhs_bigits != num_rhs_bigits) + return num_lhs_bigits > num_rhs_bigits ? 1 : -1; + int i = static_cast(lhs.bigits_.size()) - 1; + int j = static_cast(rhs.bigits_.size()) - 1; + int end = i - j; + if (end < 0) end = 0; + for (; i >= end; --i, --j) { + bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j]; + if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1; + } + if (i != j) return i > j ? 1 : -1; + return 0; + } + + // Returns compare(lhs1 + lhs2, rhs). + friend int add_compare(const bigint& lhs1, const bigint& lhs2, + const bigint& rhs) { + int max_lhs_bigits = (std::max)(lhs1.num_bigits(), lhs2.num_bigits()); + int num_rhs_bigits = rhs.num_bigits(); + if (max_lhs_bigits + 1 < num_rhs_bigits) return -1; + if (max_lhs_bigits > num_rhs_bigits) return 1; + auto get_bigit = [](const bigint& n, int i) -> bigit { + return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0; + }; + double_bigit borrow = 0; + int min_exp = (std::min)((std::min)(lhs1.exp_, lhs2.exp_), rhs.exp_); + for (int i = num_rhs_bigits - 1; i >= min_exp; --i) { + double_bigit sum = + static_cast(get_bigit(lhs1, i)) + get_bigit(lhs2, i); + bigit rhs_bigit = get_bigit(rhs, i); + if (sum > rhs_bigit + borrow) return 1; + borrow = rhs_bigit + borrow - sum; + if (borrow > 1) return -1; + borrow <<= bigit_bits; + } + return borrow != 0 ? -1 : 0; + } + + // Assigns pow(10, exp) to this bigint. + void assign_pow10(int exp) { + assert(exp >= 0); + if (exp == 0) return assign(1); + // Find the top bit. + int bitmask = 1; + while (exp >= bitmask) bitmask <<= 1; + bitmask >>= 1; + // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by + // repeated squaring and multiplication. + assign(5); + bitmask >>= 1; + while (bitmask != 0) { + square(); + if ((exp & bitmask) != 0) *this *= 5; + bitmask >>= 1; + } + *this <<= exp; // Multiply by pow(2, exp) by shifting. + } + + void square() { + basic_memory_buffer n(std::move(bigits_)); + int num_bigits = static_cast(bigits_.size()); + int num_result_bigits = 2 * num_bigits; + bigits_.resize(to_unsigned(num_result_bigits)); + using accumulator_t = conditional_t; + auto sum = accumulator_t(); + for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) { + // Compute bigit at position bigit_index of the result by adding + // cross-product terms n[i] * n[j] such that i + j == bigit_index. + for (int i = 0, j = bigit_index; j >= 0; ++i, --j) { + // Most terms are multiplied twice which can be optimized in the future. + sum += static_cast(n[i]) * n[j]; + } + (*this)[bigit_index] = static_cast(sum); + sum >>= bits::value; // Compute the carry. + } + // Do the same for the top half. + for (int bigit_index = num_bigits; bigit_index < num_result_bigits; + ++bigit_index) { + for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;) + sum += static_cast(n[i++]) * n[j--]; + (*this)[bigit_index] = static_cast(sum); + sum >>= bits::value; + } + --num_result_bigits; + remove_leading_zeros(); + exp_ *= 2; + } + + // Divides this bignum by divisor, assigning the remainder to this and + // returning the quotient. + int divmod_assign(const bigint& divisor) { + FMT_ASSERT(this != &divisor, ""); + if (compare(*this, divisor) < 0) return 0; + int num_bigits = static_cast(bigits_.size()); + FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, ""); + int exp_difference = exp_ - divisor.exp_; + if (exp_difference > 0) { + // Align bigints by adding trailing zeros to simplify subtraction. + bigits_.resize(to_unsigned(num_bigits + exp_difference)); + for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j) + bigits_[j] = bigits_[i]; + std::uninitialized_fill_n(bigits_.data(), exp_difference, 0); + exp_ -= exp_difference; + } + int quotient = 0; + do { + subtract_aligned(divisor); + ++quotient; + } while (compare(*this, divisor) >= 0); + return quotient; + } +}; + +enum class round_direction { unknown, up, down }; + +// Given the divisor (normally a power of 10), the remainder = v % divisor for +// some number v and the error, returns whether v should be rounded up, down, or +// whether the rounding direction can't be determined due to error. +// error should be less than divisor / 2. +inline round_direction get_round_direction(uint64_t divisor, uint64_t remainder, + uint64_t error) { + FMT_ASSERT(remainder < divisor, ""); // divisor - remainder won't overflow. + FMT_ASSERT(error < divisor, ""); // divisor - error won't overflow. + FMT_ASSERT(error < divisor - error, ""); // error * 2 won't overflow. + // Round down if (remainder + error) * 2 <= divisor. + if (remainder <= divisor - remainder && error * 2 <= divisor - remainder * 2) + return round_direction::down; + // Round up if (remainder - error) * 2 >= divisor. + if (remainder >= error && + remainder - error >= divisor - (remainder - error)) { + return round_direction::up; + } + return round_direction::unknown; +} + +namespace digits { +enum result { + more, // Generate more digits. + done, // Done generating digits. + error // Digit generation cancelled due to an error. +}; +} + +// A version of count_digits optimized for grisu_gen_digits. +inline int grisu_count_digits(uint32_t n) { + if (n < 10) return 1; + if (n < 100) return 2; + if (n < 1000) return 3; + if (n < 10000) return 4; + if (n < 100000) return 5; + if (n < 1000000) return 6; + if (n < 10000000) return 7; + if (n < 100000000) return 8; + if (n < 1000000000) return 9; + return 10; +} + +// Generates output using the Grisu digit-gen algorithm. +// error: the size of the region (lower, upper) outside of which numbers +// definitely do not round to value (Delta in Grisu3). +template +FMT_ALWAYS_INLINE digits::result grisu_gen_digits(fp value, uint64_t error, + int& exp, Handler& handler) { + const fp one(1ULL << -value.e, value.e); + // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be + // zero because it contains a product of two 64-bit numbers with MSB set (due + // to normalization) - 1, shifted right by at most 60 bits. + auto integral = static_cast(value.f >> -one.e); + FMT_ASSERT(integral != 0, ""); + FMT_ASSERT(integral == value.f >> -one.e, ""); + // The fractional part of scaled value (p2 in Grisu) c = value % one. + uint64_t fractional = value.f & (one.f - 1); + exp = grisu_count_digits(integral); // kappa in Grisu. + // Divide by 10 to prevent overflow. + auto result = handler.on_start(data::powers_of_10_64[exp - 1] << -one.e, + value.f / 10, error * 10, exp); + if (result != digits::more) return result; + // Generate digits for the integral part. This can produce up to 10 digits. + do { + uint32_t digit = 0; + auto divmod_integral = [&](uint32_t divisor) { + digit = integral / divisor; + integral %= divisor; + }; + // This optimization by Milo Yip reduces the number of integer divisions by + // one per iteration. + switch (exp) { + case 10: + divmod_integral(1000000000); + break; + case 9: + divmod_integral(100000000); + break; + case 8: + divmod_integral(10000000); + break; + case 7: + divmod_integral(1000000); + break; + case 6: + divmod_integral(100000); + break; + case 5: + divmod_integral(10000); + break; + case 4: + divmod_integral(1000); + break; + case 3: + divmod_integral(100); + break; + case 2: + divmod_integral(10); + break; + case 1: + digit = integral; + integral = 0; + break; + default: + FMT_ASSERT(false, "invalid number of digits"); + } + --exp; + uint64_t remainder = + (static_cast(integral) << -one.e) + fractional; + result = handler.on_digit(static_cast('0' + digit), + data::powers_of_10_64[exp] << -one.e, remainder, + error, exp, true); + if (result != digits::more) return result; + } while (exp > 0); + // Generate digits for the fractional part. + for (;;) { + fractional *= 10; + error *= 10; + char digit = + static_cast('0' + static_cast(fractional >> -one.e)); + fractional &= one.f - 1; + --exp; + result = handler.on_digit(digit, one.f, fractional, error, exp, false); + if (result != digits::more) return result; + } +} + +// The fixed precision digit handler. +struct fixed_handler { + char* buf; + int size; + int precision; + int exp10; + bool fixed; + + digits::result on_start(uint64_t divisor, uint64_t remainder, uint64_t error, + int& exp) { + // Non-fixed formats require at least one digit and no precision adjustment. + if (!fixed) return digits::more; + // Adjust fixed precision by exponent because it is relative to decimal + // point. + precision += exp + exp10; + // Check if precision is satisfied just by leading zeros, e.g. + // format("{:.2f}", 0.001) gives "0.00" without generating any digits. + if (precision > 0) return digits::more; + if (precision < 0) return digits::done; + auto dir = get_round_direction(divisor, remainder, error); + if (dir == round_direction::unknown) return digits::error; + buf[size++] = dir == round_direction::up ? '1' : '0'; + return digits::done; + } + + digits::result on_digit(char digit, uint64_t divisor, uint64_t remainder, + uint64_t error, int, bool integral) { + FMT_ASSERT(remainder < divisor, ""); + buf[size++] = digit; + if (size < precision) return digits::more; + if (!integral) { + // Check if error * 2 < divisor with overflow prevention. + // The check is not needed for the integral part because error = 1 + // and divisor > (1 << 32) there. + if (error >= divisor || error >= divisor - error) return digits::error; + } else { + FMT_ASSERT(error == 1 && divisor > 2, ""); + } + auto dir = get_round_direction(divisor, remainder, error); + if (dir != round_direction::up) + return dir == round_direction::down ? digits::done : digits::error; + ++buf[size - 1]; + for (int i = size - 1; i > 0 && buf[i] > '9'; --i) { + buf[i] = '0'; + ++buf[i - 1]; + } + if (buf[0] > '9') { + buf[0] = '1'; + buf[size++] = '0'; + } + return digits::done; + } +}; + +// The shortest representation digit handler. +struct grisu_shortest_handler { + char* buf; + int size; + // Distance between scaled value and upper bound (wp_W in Grisu3). + uint64_t diff; + + digits::result on_start(uint64_t, uint64_t, uint64_t, int&) { + return digits::more; + } + + // Decrement the generated number approaching value from above. + void round(uint64_t d, uint64_t divisor, uint64_t& remainder, + uint64_t error) { + while ( + remainder < d && error - remainder >= divisor && + (remainder + divisor < d || d - remainder >= remainder + divisor - d)) { + --buf[size - 1]; + remainder += divisor; + } + } + + // Implements Grisu's round_weed. + digits::result on_digit(char digit, uint64_t divisor, uint64_t remainder, + uint64_t error, int exp, bool integral) { + buf[size++] = digit; + if (remainder >= error) return digits::more; + uint64_t unit = integral ? 1 : data::powers_of_10_64[-exp]; + uint64_t up = (diff - 1) * unit; // wp_Wup + round(up, divisor, remainder, error); + uint64_t down = (diff + 1) * unit; // wp_Wdown + if (remainder < down && error - remainder >= divisor && + (remainder + divisor < down || + down - remainder > remainder + divisor - down)) { + return digits::error; + } + return 2 * unit <= remainder && remainder <= error - 4 * unit + ? digits::done + : digits::error; + } +}; + +// Formats value using a variation of the Fixed-Precision Positive +// Floating-Point Printout ((FPP)^2) algorithm by Steele & White: +// https://fmt.dev/p372-steele.pdf. +template +void fallback_format(Double d, buffer& buf, int& exp10) { + bigint numerator; // 2 * R in (FPP)^2. + bigint denominator; // 2 * S in (FPP)^2. + // lower and upper are differences between value and corresponding boundaries. + bigint lower; // (M^- in (FPP)^2). + bigint upper_store; // upper's value if different from lower. + bigint* upper = nullptr; // (M^+ in (FPP)^2). + fp value; + // Shift numerator and denominator by an extra bit or two (if lower boundary + // is closer) to make lower and upper integers. This eliminates multiplication + // by 2 during later computations. + // TODO: handle float + int shift = value.assign(d) ? 2 : 1; + uint64_t significand = value.f << shift; + if (value.e >= 0) { + numerator.assign(significand); + numerator <<= value.e; + lower.assign(1); + lower <<= value.e; + if (shift != 1) { + upper_store.assign(1); + upper_store <<= value.e + 1; + upper = &upper_store; + } + denominator.assign_pow10(exp10); + denominator <<= 1; + } else if (exp10 < 0) { + numerator.assign_pow10(-exp10); + lower.assign(numerator); + if (shift != 1) { + upper_store.assign(numerator); + upper_store <<= 1; + upper = &upper_store; + } + numerator *= significand; + denominator.assign(1); + denominator <<= shift - value.e; + } else { + numerator.assign(significand); + denominator.assign_pow10(exp10); + denominator <<= shift - value.e; + lower.assign(1); + if (shift != 1) { + upper_store.assign(1ULL << 1); + upper = &upper_store; + } + } + if (!upper) upper = &lower; + // Invariant: value == (numerator / denominator) * pow(10, exp10). + bool even = (value.f & 1) == 0; + int num_digits = 0; + char* data = buf.data(); + for (;;) { + int digit = numerator.divmod_assign(denominator); + bool low = compare(numerator, lower) - even < 0; // numerator <[=] lower. + // numerator + upper >[=] pow10: + bool high = add_compare(numerator, *upper, denominator) + even > 0; + data[num_digits++] = static_cast('0' + digit); + if (low || high) { + if (!low) { + ++data[num_digits - 1]; + } else if (high) { + int result = add_compare(numerator, numerator, denominator); + // Round half to even. + if (result > 0 || (result == 0 && (digit % 2) != 0)) + ++data[num_digits - 1]; + } + buf.resize(to_unsigned(num_digits)); + exp10 -= num_digits - 1; + return; + } + numerator *= 10; + lower *= 10; + if (upper != &lower) *upper *= 10; + } +} + +// Formats value using the Grisu algorithm +// (https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf) +// if T is a IEEE754 binary32 or binary64 and snprintf otherwise. +template +int format_float(T value, int precision, float_specs specs, buffer& buf) { + static_assert(!std::is_same::value, ""); + FMT_ASSERT(value >= 0, "value is negative"); + + const bool fixed = specs.format == float_format::fixed; + if (value <= 0) { // <= instead of == to silence a warning. + if (precision <= 0 || !fixed) { + buf.push_back('0'); + return 0; + } + buf.resize(to_unsigned(precision)); + std::uninitialized_fill_n(buf.data(), precision, '0'); + return -precision; + } + + if (!specs.use_grisu) return snprintf_float(value, precision, specs, buf); + + int exp = 0; + const int min_exp = -60; // alpha in Grisu. + int cached_exp10 = 0; // K in Grisu. + if (precision < 0) { + fp fp_value; + auto boundaries = specs.binary32 + ? fp_value.assign_float_with_boundaries(value) + : fp_value.assign_with_boundaries(value); + fp_value = normalize(fp_value); + // Find a cached power of 10 such that multiplying value by it will bring + // the exponent in the range [min_exp, -32]. + const fp cached_pow = get_cached_power( + min_exp - (fp_value.e + fp::significand_size), cached_exp10); + // Multiply value and boundaries by the cached power of 10. + fp_value = fp_value * cached_pow; + boundaries.lower = multiply(boundaries.lower, cached_pow.f); + boundaries.upper = multiply(boundaries.upper, cached_pow.f); + assert(min_exp <= fp_value.e && fp_value.e <= -32); + --boundaries.lower; // \tilde{M}^- - 1 ulp -> M^-_{\downarrow}. + ++boundaries.upper; // \tilde{M}^+ + 1 ulp -> M^+_{\uparrow}. + // Numbers outside of (lower, upper) definitely do not round to value. + grisu_shortest_handler handler{buf.data(), 0, + boundaries.upper - fp_value.f}; + auto result = + grisu_gen_digits(fp(boundaries.upper, fp_value.e), + boundaries.upper - boundaries.lower, exp, handler); + if (result == digits::error) { + exp += handler.size - cached_exp10 - 1; + fallback_format(value, buf, exp); + return exp; + } + buf.resize(to_unsigned(handler.size)); + } else { + if (precision > 17) return snprintf_float(value, precision, specs, buf); + fp normalized = normalize(fp(value)); + const auto cached_pow = get_cached_power( + min_exp - (normalized.e + fp::significand_size), cached_exp10); + normalized = normalized * cached_pow; + fixed_handler handler{buf.data(), 0, precision, -cached_exp10, fixed}; + if (grisu_gen_digits(normalized, 1, exp, handler) == digits::error) + return snprintf_float(value, precision, specs, buf); + int num_digits = handler.size; + if (!fixed) { + // Remove trailing zeros. + while (num_digits > 0 && buf[num_digits - 1] == '0') { + --num_digits; + ++exp; + } + } + buf.resize(to_unsigned(num_digits)); + } + return exp - cached_exp10; +} + +template +int snprintf_float(T value, int precision, float_specs specs, + buffer& buf) { + // Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail. + FMT_ASSERT(buf.capacity() > buf.size(), "empty buffer"); + static_assert(!std::is_same::value, ""); + + // Subtract 1 to account for the difference in precision since we use %e for + // both general and exponent format. + if (specs.format == float_format::general || + specs.format == float_format::exp) + precision = (precision >= 0 ? precision : 6) - 1; + + // Build the format string. + enum { max_format_size = 7 }; // Ths longest format is "%#.*Le". + char format[max_format_size]; + char* format_ptr = format; + *format_ptr++ = '%'; + if (specs.showpoint && specs.format == float_format::hex) *format_ptr++ = '#'; + if (precision >= 0) { + *format_ptr++ = '.'; + *format_ptr++ = '*'; + } + if (std::is_same()) *format_ptr++ = 'L'; + *format_ptr++ = specs.format != float_format::hex + ? (specs.format == float_format::fixed ? 'f' : 'e') + : (specs.upper ? 'A' : 'a'); + *format_ptr = '\0'; + + // Format using snprintf. + auto offset = buf.size(); + for (;;) { + auto begin = buf.data() + offset; + auto capacity = buf.capacity() - offset; +#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION + if (precision > 100000) + throw std::runtime_error( + "fuzz mode - avoid large allocation inside snprintf"); +#endif + // Suppress the warning about a nonliteral format string. + // Cannot use auto becase of a bug in MinGW (#1532). + int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF; + int result = precision >= 0 + ? snprintf_ptr(begin, capacity, format, precision, value) + : snprintf_ptr(begin, capacity, format, value); + if (result < 0) { + buf.reserve(buf.capacity() + 1); // The buffer will grow exponentially. + continue; + } + auto size = to_unsigned(result); + // Size equal to capacity means that the last character was truncated. + if (size >= capacity) { + buf.reserve(size + offset + 1); // Add 1 for the terminating '\0'. + continue; + } + auto is_digit = [](char c) { return c >= '0' && c <= '9'; }; + if (specs.format == float_format::fixed) { + if (precision == 0) { + buf.resize(size); + return 0; + } + // Find and remove the decimal point. + auto end = begin + size, p = end; + do { + --p; + } while (is_digit(*p)); + int fraction_size = static_cast(end - p - 1); + std::memmove(p, p + 1, to_unsigned(fraction_size)); + buf.resize(size - 1); + return -fraction_size; + } + if (specs.format == float_format::hex) { + buf.resize(size + offset); + return 0; + } + // Find and parse the exponent. + auto end = begin + size, exp_pos = end; + do { + --exp_pos; + } while (*exp_pos != 'e'); + char sign = exp_pos[1]; + assert(sign == '+' || sign == '-'); + int exp = 0; + auto p = exp_pos + 2; // Skip 'e' and sign. + do { + assert(is_digit(*p)); + exp = exp * 10 + (*p++ - '0'); + } while (p != end); + if (sign == '-') exp = -exp; + int fraction_size = 0; + if (exp_pos != begin + 1) { + // Remove trailing zeros. + auto fraction_end = exp_pos - 1; + while (*fraction_end == '0') --fraction_end; + // Move the fractional part left to get rid of the decimal point. + fraction_size = static_cast(fraction_end - begin - 1); + std::memmove(begin + 1, begin + 2, to_unsigned(fraction_size)); + } + buf.resize(to_unsigned(fraction_size) + offset + 1); + return exp - fraction_size; + } +} + +// A public domain branchless UTF-8 decoder by Christopher Wellons: +// https://github.com/skeeto/branchless-utf8 +/* Decode the next character, c, from buf, reporting errors in e. + * + * Since this is a branchless decoder, four bytes will be read from the + * buffer regardless of the actual length of the next character. This + * means the buffer _must_ have at least three bytes of zero padding + * following the end of the data stream. + * + * Errors are reported in e, which will be non-zero if the parsed + * character was somehow invalid: invalid byte sequence, non-canonical + * encoding, or a surrogate half. + * + * The function returns a pointer to the next character. When an error + * occurs, this pointer will be a guess that depends on the particular + * error, but it will always advance at least one byte. + */ +FMT_FUNC const char* utf8_decode(const char* buf, uint32_t* c, int* e) { + static const char lengths[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, + 0, 0, 2, 2, 2, 2, 3, 3, 4, 0}; + static const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07}; + static const uint32_t mins[] = {4194304, 0, 128, 2048, 65536}; + static const int shiftc[] = {0, 18, 12, 6, 0}; + static const int shifte[] = {0, 6, 4, 2, 0}; + + auto s = reinterpret_cast(buf); + int len = lengths[s[0] >> 3]; + + // Compute the pointer to the next character early so that the next + // iteration can start working on the next character. Neither Clang + // nor GCC figure out this reordering on their own. + const char* next = buf + len + !len; + + // Assume a four-byte character and load four bytes. Unused bits are + // shifted out. + *c = uint32_t(s[0] & masks[len]) << 18; + *c |= uint32_t(s[1] & 0x3f) << 12; + *c |= uint32_t(s[2] & 0x3f) << 6; + *c |= uint32_t(s[3] & 0x3f) << 0; + *c >>= shiftc[len]; + + // Accumulate the various error conditions. + *e = (*c < mins[len]) << 6; // non-canonical encoding + *e |= ((*c >> 11) == 0x1b) << 7; // surrogate half? + *e |= (*c > 0x10FFFF) << 8; // out of range? + *e |= (s[1] & 0xc0) >> 2; + *e |= (s[2] & 0xc0) >> 4; + *e |= (s[3]) >> 6; + *e ^= 0x2a; // top two bits of each tail byte correct? + *e >>= shifte[len]; + + return next; +} +} // namespace internal + +template <> struct formatter { + format_parse_context::iterator parse(format_parse_context& ctx) { + return ctx.begin(); + } + + format_context::iterator format(const internal::bigint& n, + format_context& ctx) { + auto out = ctx.out(); + bool first = true; + for (auto i = n.bigits_.size(); i > 0; --i) { + auto value = n.bigits_[i - 1u]; + if (first) { + out = format_to(out, "{:x}", value); + first = false; + continue; + } + out = format_to(out, "{:08x}", value); + } + if (n.exp_ > 0) + out = format_to(out, "p{}", n.exp_ * internal::bigint::bigit_bits); + return out; + } +}; + +FMT_FUNC internal::utf8_to_utf16::utf8_to_utf16(string_view s) { + auto transcode = [this](const char* p) { + auto cp = uint32_t(); + auto error = 0; + p = utf8_decode(p, &cp, &error); + if (error != 0) FMT_THROW(std::runtime_error("invalid utf8")); + if (cp <= 0xFFFF) { + buffer_.push_back(static_cast(cp)); + } else { + cp -= 0x10000; + buffer_.push_back(static_cast(0xD800 + (cp >> 10))); + buffer_.push_back(static_cast(0xDC00 + (cp & 0x3FF))); + } + return p; + }; + auto p = s.data(); + const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars. + if (s.size() >= block_size) { + for (auto end = p + s.size() - block_size + 1; p < end;) p = transcode(p); + } + if (auto num_chars_left = s.data() + s.size() - p) { + char buf[2 * block_size - 1] = {}; + memcpy(buf, p, to_unsigned(num_chars_left)); + p = buf; + do { + p = transcode(p); + } while (p - buf < num_chars_left); + } + buffer_.push_back(0); +} + +FMT_FUNC void format_system_error(internal::buffer& out, int error_code, + string_view message) FMT_NOEXCEPT { + FMT_TRY { + memory_buffer buf; + buf.resize(inline_buffer_size); + for (;;) { + char* system_message = &buf[0]; + int result = + internal::safe_strerror(error_code, system_message, buf.size()); + if (result == 0) { + internal::writer w(out); + w.write(message); + w.write(": "); + w.write(system_message); + return; + } + if (result != ERANGE) + break; // Can't get error message, report error code instead. + buf.resize(buf.size() * 2); + } + } + FMT_CATCH(...) {} + format_error_code(out, error_code, message); +} + +FMT_FUNC void internal::error_handler::on_error(const char* message) { + FMT_THROW(format_error(message)); +} + +FMT_FUNC void report_system_error(int error_code, + fmt::string_view message) FMT_NOEXCEPT { + report_error(format_system_error, error_code, message); +} + +FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) { + memory_buffer buffer; + internal::vformat_to(buffer, format_str, + basic_format_args>(args)); +#ifdef _WIN32 + auto fd = _fileno(f); + if (_isatty(fd)) { + internal::utf8_to_utf16 u16(string_view(buffer.data(), buffer.size())); + auto written = DWORD(); + if (!WriteConsoleW(reinterpret_cast(_get_osfhandle(fd)), + u16.c_str(), static_cast(u16.size()), &written, + nullptr)) { + throw format_error("failed to write to console"); + } + return; + } +#endif + internal::fwrite_fully(buffer.data(), 1, buffer.size(), f); +} + +#ifdef _WIN32 +// Print assuming legacy (non-Unicode) encoding. +FMT_FUNC void internal::vprint_mojibake(std::FILE* f, string_view format_str, + format_args args) { + memory_buffer buffer; + internal::vformat_to(buffer, format_str, + basic_format_args>(args)); + fwrite_fully(buffer.data(), 1, buffer.size(), f); +} +#endif + +FMT_FUNC void vprint(string_view format_str, format_args args) { + vprint(stdout, format_str, args); +} + +FMT_END_NAMESPACE + +#ifdef _MSC_VER +# pragma warning(pop) +#endif + +#endif // FMT_FORMAT_INL_H_ Index: libraries/source/fmt/include/fmt/format.h =================================================================== --- /dev/null +++ libraries/source/fmt/include/fmt/format.h @@ -0,0 +1,3637 @@ +/* + Formatting library for C++ + + 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. + */ + +#ifndef FMT_FORMAT_H_ +#define FMT_FORMAT_H_ + +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" + +#ifdef __INTEL_COMPILER +# define FMT_ICC_VERSION __INTEL_COMPILER +#elif defined(__ICL) +# define FMT_ICC_VERSION __ICL +#else +# define FMT_ICC_VERSION 0 +#endif + +#ifdef __NVCC__ +# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__) +#else +# define FMT_CUDA_VERSION 0 +#endif + +#ifdef __has_builtin +# define FMT_HAS_BUILTIN(x) __has_builtin(x) +#else +# define FMT_HAS_BUILTIN(x) 0 +#endif + +#if __cplusplus == 201103L || __cplusplus == 201402L +# if defined(__clang__) +# define FMT_FALLTHROUGH [[clang::fallthrough]] +# elif FMT_GCC_VERSION >= 700 && !defined(__PGI) +# define FMT_FALLTHROUGH [[gnu::fallthrough]] +# else +# define FMT_FALLTHROUGH +# endif +#elif FMT_HAS_CPP17_ATTRIBUTE(fallthrough) || \ + (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) +# define FMT_FALLTHROUGH [[fallthrough]] +#else +# define FMT_FALLTHROUGH +#endif + +#ifndef FMT_THROW +# if FMT_EXCEPTIONS +# if FMT_MSC_VER || FMT_NVCC +FMT_BEGIN_NAMESPACE +namespace internal { +template inline void do_throw(const Exception& x) { + // Silence unreachable code warnings in MSVC and NVCC because these + // are nearly impossible to fix in a generic code. + volatile bool b = true; + if (b) throw x; +} +} // namespace internal +FMT_END_NAMESPACE +# define FMT_THROW(x) internal::do_throw(x) +# else +# define FMT_THROW(x) throw x +# endif +# else +# define FMT_THROW(x) \ + do { \ + static_cast(sizeof(x)); \ + FMT_ASSERT(false, ""); \ + } while (false) +# endif +#endif + +#if FMT_EXCEPTIONS +# define FMT_TRY try +# define FMT_CATCH(x) catch (x) +#else +# define FMT_TRY if (true) +# define FMT_CATCH(x) if (false) +#endif + +#ifndef FMT_USE_USER_DEFINED_LITERALS +// For Intel and NVIDIA compilers both they and the system gcc/msc support UDLs. +# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \ + FMT_MSC_VER >= 1900) && \ + (!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || FMT_ICC_VERSION >= 1500 || \ + FMT_CUDA_VERSION >= 700) +# define FMT_USE_USER_DEFINED_LITERALS 1 +# else +# define FMT_USE_USER_DEFINED_LITERALS 0 +# endif +#endif + +#ifndef FMT_USE_UDL_TEMPLATE +// EDG front end based compilers (icc, nvcc) and GCC < 6.4 do not propertly +// support UDL templates and GCC >= 9 warns about them. +# if FMT_USE_USER_DEFINED_LITERALS && FMT_ICC_VERSION == 0 && \ + FMT_CUDA_VERSION == 0 && \ + ((FMT_GCC_VERSION >= 604 && FMT_GCC_VERSION <= 900 && \ + __cplusplus >= 201402L) || \ + FMT_CLANG_VERSION >= 304) +# define FMT_USE_UDL_TEMPLATE 1 +# else +# define FMT_USE_UDL_TEMPLATE 0 +# endif +#endif + +#ifndef FMT_USE_FLOAT +# define FMT_USE_FLOAT 1 +#endif + +#ifndef FMT_USE_DOUBLE +# define FMT_USE_DOUBLE 1 +#endif + +#ifndef FMT_USE_LONG_DOUBLE +# define FMT_USE_LONG_DOUBLE 1 +#endif + +// __builtin_clz is broken in clang with Microsoft CodeGen: +// https://github.com/fmtlib/fmt/issues/519 +#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clz)) && !FMT_MSC_VER +# define FMT_BUILTIN_CLZ(n) __builtin_clz(n) +#endif +#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clzll)) && !FMT_MSC_VER +# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n) +#endif + +// Some compilers masquerade as both MSVC and GCC-likes or otherwise support +// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the +// MSVC intrinsics if the clz and clzll builtins are not available. +#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(_MANAGED) +# include // _BitScanReverse, _BitScanReverse64 + +FMT_BEGIN_NAMESPACE +namespace internal { +// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning. +# ifndef __clang__ +# pragma intrinsic(_BitScanReverse) +# endif +inline uint32_t clz(uint32_t x) { + unsigned long r = 0; + _BitScanReverse(&r, x); + + FMT_ASSERT(x != 0, ""); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. +# pragma warning(suppress : 6102) + return 31 - r; +} +# define FMT_BUILTIN_CLZ(n) internal::clz(n) + +# if defined(_WIN64) && !defined(__clang__) +# pragma intrinsic(_BitScanReverse64) +# endif + +inline uint32_t clzll(uint64_t x) { + unsigned long r = 0; +# ifdef _WIN64 + _BitScanReverse64(&r, x); +# else + // Scan the high 32 bits. + if (_BitScanReverse(&r, static_cast(x >> 32))) return 63 - (r + 32); + + // Scan the low 32 bits. + _BitScanReverse(&r, static_cast(x)); +# endif + + FMT_ASSERT(x != 0, ""); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. +# pragma warning(suppress : 6102) + return 63 - r; +} +# define FMT_BUILTIN_CLZLL(n) internal::clzll(n) +} // namespace internal +FMT_END_NAMESPACE +#endif + +// Enable the deprecated numeric alignment. +#ifndef FMT_NUMERIC_ALIGN +# define FMT_NUMERIC_ALIGN 1 +#endif + +// Enable the deprecated percent specifier. +#ifndef FMT_DEPRECATED_PERCENT +# define FMT_DEPRECATED_PERCENT 0 +#endif + +FMT_BEGIN_NAMESPACE +namespace internal { + +// An equivalent of `*reinterpret_cast(&source)` that doesn't have +// undefined behavior (e.g. due to type aliasing). +// Example: uint64_t d = bit_cast(2.718); +template +inline Dest bit_cast(const Source& source) { + static_assert(sizeof(Dest) == sizeof(Source), "size mismatch"); + Dest dest; + std::memcpy(&dest, &source, sizeof(dest)); + return dest; +} + +inline bool is_big_endian() { + const auto u = 1u; + struct bytes { + char data[sizeof(u)]; + }; + return bit_cast(u).data[0] == 0; +} + +// A fallback implementation of uintptr_t for systems that lack it. +struct fallback_uintptr { + unsigned char value[sizeof(void*)]; + + fallback_uintptr() = default; + explicit fallback_uintptr(const void* p) { + *this = bit_cast(p); + if (is_big_endian()) { + for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j) + std::swap(value[i], value[j]); + } + } +}; +#ifdef UINTPTR_MAX +using uintptr_t = ::uintptr_t; +inline uintptr_t to_uintptr(const void* p) { return bit_cast(p); } +#else +using uintptr_t = fallback_uintptr; +inline fallback_uintptr to_uintptr(const void* p) { + return fallback_uintptr(p); +} +#endif + +// Returns the largest possible value for type T. Same as +// std::numeric_limits::max() but shorter and not affected by the max macro. +template constexpr T max_value() { + return (std::numeric_limits::max)(); +} +template constexpr int num_bits() { + return std::numeric_limits::digits; +} +template <> constexpr int num_bits() { + return static_cast(sizeof(void*) * + std::numeric_limits::digits); +} + +// An approximation of iterator_t for pre-C++20 systems. +template +using iterator_t = decltype(std::begin(std::declval())); + +// Detect the iterator category of *any* given type in a SFINAE-friendly way. +// Unfortunately, older implementations of std::iterator_traits are not safe +// for use in a SFINAE-context. +template +struct iterator_category : std::false_type {}; + +template struct iterator_category { + using type = std::random_access_iterator_tag; +}; + +template +struct iterator_category> { + using type = typename It::iterator_category; +}; + +// Detect if *any* given type models the OutputIterator concept. +template class is_output_iterator { + // Check for mutability because all iterator categories derived from + // std::input_iterator_tag *may* also meet the requirements of an + // OutputIterator, thereby falling into the category of 'mutable iterators' + // [iterator.requirements.general] clause 4. The compiler reveals this + // property only at the point of *actually dereferencing* the iterator! + template + static decltype(*(std::declval())) test(std::input_iterator_tag); + template static char& test(std::output_iterator_tag); + template static const char& test(...); + + using type = decltype(test(typename iterator_category::type{})); + + public: + enum { value = !std::is_const>::value }; +}; + +// A workaround for std::string not having mutable data() until C++17. +template inline Char* get_data(std::basic_string& s) { + return &s[0]; +} +template +inline typename Container::value_type* get_data(Container& c) { + return c.data(); +} + +#if defined(_SECURE_SCL) && _SECURE_SCL +// Make a checked iterator to avoid MSVC warnings. +template using checked_ptr = stdext::checked_array_iterator; +template checked_ptr make_checked(T* p, std::size_t size) { + return {p, size}; +} +#else +template using checked_ptr = T*; +template inline T* make_checked(T* p, std::size_t) { return p; } +#endif + +template ::value)> +inline checked_ptr reserve( + std::back_insert_iterator& it, std::size_t n) { + Container& c = get_container(it); + std::size_t size = c.size(); + c.resize(size + n); + return make_checked(get_data(c) + size, n); +} + +template +inline Iterator& reserve(Iterator& it, std::size_t) { + return it; +} + +// An output iterator that counts the number of objects written to it and +// discards them. +class counting_iterator { + private: + std::size_t count_; + + public: + using iterator_category = std::output_iterator_tag; + using difference_type = std::ptrdiff_t; + using pointer = void; + using reference = void; + using _Unchecked_type = counting_iterator; // Mark iterator as checked. + + struct value_type { + template void operator=(const T&) {} + }; + + counting_iterator() : count_(0) {} + + std::size_t count() const { return count_; } + + counting_iterator& operator++() { + ++count_; + return *this; + } + + counting_iterator operator++(int) { + auto it = *this; + ++*this; + return it; + } + + value_type operator*() const { return {}; } +}; + +template class truncating_iterator_base { + protected: + OutputIt out_; + std::size_t limit_; + std::size_t count_; + + truncating_iterator_base(OutputIt out, std::size_t limit) + : out_(out), limit_(limit), count_(0) {} + + public: + using iterator_category = std::output_iterator_tag; + using value_type = typename std::iterator_traits::value_type; + using difference_type = void; + using pointer = void; + using reference = void; + using _Unchecked_type = + truncating_iterator_base; // Mark iterator as checked. + + OutputIt base() const { return out_; } + std::size_t count() const { return count_; } +}; + +// An output iterator that truncates the output and counts the number of objects +// written to it. +template ::value_type>::type> +class truncating_iterator; + +template +class truncating_iterator + : public truncating_iterator_base { + mutable typename truncating_iterator_base::value_type blackhole_; + + public: + using value_type = typename truncating_iterator_base::value_type; + + truncating_iterator(OutputIt out, std::size_t limit) + : truncating_iterator_base(out, limit) {} + + truncating_iterator& operator++() { + if (this->count_++ < this->limit_) ++this->out_; + return *this; + } + + truncating_iterator operator++(int) { + auto it = *this; + ++*this; + return it; + } + + value_type& operator*() const { + return this->count_ < this->limit_ ? *this->out_ : blackhole_; + } +}; + +template +class truncating_iterator + : public truncating_iterator_base { + public: + truncating_iterator(OutputIt out, std::size_t limit) + : truncating_iterator_base(out, limit) {} + + template truncating_iterator& operator=(T val) { + if (this->count_++ < this->limit_) *this->out_++ = val; + return *this; + } + + truncating_iterator& operator++() { return *this; } + truncating_iterator& operator++(int) { return *this; } + truncating_iterator& operator*() { return *this; } +}; + +// A range with the specified output iterator and value type. +template +class output_range { + private: + OutputIt it_; + + public: + using value_type = T; + using iterator = OutputIt; + struct sentinel {}; + + explicit output_range(OutputIt it) : it_(it) {} + OutputIt begin() const { return it_; } + sentinel end() const { return {}; } // Sentinel is not used yet. +}; + +template +inline size_t count_code_points(basic_string_view s) { + return s.size(); +} + +// Counts the number of code points in a UTF-8 string. +inline size_t count_code_points(basic_string_view s) { + const char* data = s.data(); + size_t num_code_points = 0; + for (size_t i = 0, size = s.size(); i != size; ++i) { + if ((data[i] & 0xc0) != 0x80) ++num_code_points; + } + return num_code_points; +} + +inline size_t count_code_points(basic_string_view s) { + return count_code_points(basic_string_view( + reinterpret_cast(s.data()), s.size())); +} + +template +inline size_t code_point_index(basic_string_view s, size_t n) { + size_t size = s.size(); + return n < size ? n : size; +} + +// Calculates the index of the nth code point in a UTF-8 string. +inline size_t code_point_index(basic_string_view s, size_t n) { + const char8_type* data = s.data(); + size_t num_code_points = 0; + for (size_t i = 0, size = s.size(); i != size; ++i) { + if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) { + return i; + } + } + return s.size(); +} + +inline char8_type to_char8_t(char c) { return static_cast(c); } + +template +using needs_conversion = bool_constant< + std::is_same::value_type, + char>::value && + std::is_same::value>; + +template ::value)> +OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) { + return std::copy(begin, end, it); +} + +template ::value)> +OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) { + return std::transform(begin, end, it, to_char8_t); +} + +#ifndef FMT_USE_GRISU +# define FMT_USE_GRISU 1 +#endif + +template constexpr bool use_grisu() { + return FMT_USE_GRISU && std::numeric_limits::is_iec559 && + sizeof(T) <= sizeof(double); +} + +template +template +void buffer::append(const U* begin, const U* end) { + std::size_t new_size = size_ + to_unsigned(end - begin); + reserve(new_size); + std::uninitialized_copy(begin, end, make_checked(ptr_, capacity_) + size_); + size_ = new_size; +} +} // namespace internal + +// A range with an iterator appending to a buffer. +template +class buffer_range : public internal::output_range< + std::back_insert_iterator>, T> { + public: + using iterator = std::back_insert_iterator>; + using internal::output_range::output_range; + buffer_range(internal::buffer& buf) + : internal::output_range(std::back_inserter(buf)) {} +}; + +class FMT_DEPRECATED u8string_view + : public basic_string_view { + public: + u8string_view(const char* s) + : basic_string_view( + reinterpret_cast(s)) {} + u8string_view(const char* s, size_t count) FMT_NOEXCEPT + : basic_string_view( + reinterpret_cast(s), count) {} +}; + +#if FMT_USE_USER_DEFINED_LITERALS +inline namespace literals { +FMT_DEPRECATED inline basic_string_view operator"" _u( + const char* s, std::size_t n) { + return {reinterpret_cast(s), n}; +} +} // namespace literals +#endif + +// The number of characters to store in the basic_memory_buffer object itself +// to avoid dynamic memory allocation. +enum { inline_buffer_size = 500 }; + +/** + \rst + A dynamically growing memory buffer for trivially copyable/constructible types + with the first ``SIZE`` elements stored in the object itself. + + You can use one of the following type aliases for common character types: + + +----------------+------------------------------+ + | Type | Definition | + +================+==============================+ + | memory_buffer | basic_memory_buffer | + +----------------+------------------------------+ + | wmemory_buffer | basic_memory_buffer | + +----------------+------------------------------+ + + **Example**:: + + fmt::memory_buffer out; + format_to(out, "The answer is {}.", 42); + + This will append the following output to the ``out`` object: + + .. code-block:: none + + The answer is 42. + + The output can be converted to an ``std::string`` with ``to_string(out)``. + \endrst + */ +template > +class basic_memory_buffer : private Allocator, public internal::buffer { + private: + T store_[SIZE]; + + // Deallocate memory allocated by the buffer. + void deallocate() { + T* data = this->data(); + if (data != store_) Allocator::deallocate(data, this->capacity()); + } + + protected: + void grow(std::size_t size) FMT_OVERRIDE; + + public: + using value_type = T; + using const_reference = const T&; + + explicit basic_memory_buffer(const Allocator& alloc = Allocator()) + : Allocator(alloc) { + this->set(store_, SIZE); + } + ~basic_memory_buffer() FMT_OVERRIDE { deallocate(); } + + private: + // Move data from other to this buffer. + void move(basic_memory_buffer& other) { + Allocator &this_alloc = *this, &other_alloc = other; + this_alloc = std::move(other_alloc); + T* data = other.data(); + std::size_t size = other.size(), capacity = other.capacity(); + if (data == other.store_) { + this->set(store_, capacity); + std::uninitialized_copy(other.store_, other.store_ + size, + internal::make_checked(store_, capacity)); + } else { + this->set(data, capacity); + // Set pointer to the inline array so that delete is not called + // when deallocating. + other.set(other.store_, 0); + } + this->resize(size); + } + + public: + /** + \rst + Constructs a :class:`fmt::basic_memory_buffer` object moving the content + of the other object to it. + \endrst + */ + basic_memory_buffer(basic_memory_buffer&& other) FMT_NOEXCEPT { move(other); } + + /** + \rst + Moves the content of the other ``basic_memory_buffer`` object to this one. + \endrst + */ + basic_memory_buffer& operator=(basic_memory_buffer&& other) FMT_NOEXCEPT { + FMT_ASSERT(this != &other, ""); + deallocate(); + move(other); + return *this; + } + + // Returns a copy of the allocator associated with this buffer. + Allocator get_allocator() const { return *this; } +}; + +template +void basic_memory_buffer::grow(std::size_t size) { +#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION + if (size > 1000) throw std::runtime_error("fuzz mode - won't grow that much"); +#endif + std::size_t old_capacity = this->capacity(); + std::size_t new_capacity = old_capacity + old_capacity / 2; + if (size > new_capacity) new_capacity = size; + T* old_data = this->data(); + T* new_data = std::allocator_traits::allocate(*this, new_capacity); + // The following code doesn't throw, so the raw pointer above doesn't leak. + std::uninitialized_copy(old_data, old_data + this->size(), + internal::make_checked(new_data, new_capacity)); + this->set(new_data, new_capacity); + // deallocate must not throw according to the standard, but even if it does, + // the buffer already uses the new storage and will deallocate it in + // destructor. + if (old_data != store_) Allocator::deallocate(old_data, old_capacity); +} + +using memory_buffer = basic_memory_buffer; +using wmemory_buffer = basic_memory_buffer; + +/** A formatting error such as invalid format string. */ +FMT_CLASS_API +class FMT_API format_error : public std::runtime_error { + public: + explicit format_error(const char* message) : std::runtime_error(message) {} + explicit format_error(const std::string& message) + : std::runtime_error(message) {} + format_error(const format_error&) = default; + format_error& operator=(const format_error&) = default; + format_error(format_error&&) = default; + format_error& operator=(format_error&&) = default; + ~format_error() FMT_NOEXCEPT FMT_OVERRIDE; +}; + +namespace internal { + +// Returns true if value is negative, false otherwise. +// Same as `value < 0` but doesn't produce warnings if T is an unsigned type. +template ::is_signed)> +FMT_CONSTEXPR bool is_negative(T value) { + return value < 0; +} +template ::is_signed)> +FMT_CONSTEXPR bool is_negative(T) { + return false; +} + +template ::value)> +FMT_CONSTEXPR bool is_supported_floating_point(T) { + return (std::is_same::value && FMT_USE_FLOAT) || + (std::is_same::value && FMT_USE_DOUBLE) || + (std::is_same::value && FMT_USE_LONG_DOUBLE); +} + +// Smallest of uint32_t, uint64_t, uint128_t that is large enough to +// represent all values of T. +template +using uint32_or_64_or_128_t = conditional_t< + std::numeric_limits::digits <= 32, uint32_t, + conditional_t::digits <= 64, uint64_t, uint128_t>>; + +// Static data is placed in this class template for the header-only config. +template struct FMT_EXTERN_TEMPLATE_API basic_data { + static const uint64_t powers_of_10_64[]; + static const uint32_t zero_or_powers_of_10_32[]; + static const uint64_t zero_or_powers_of_10_64[]; + static const uint64_t pow10_significands[]; + static const int16_t pow10_exponents[]; + static const char digits[]; + static const char hex_digits[]; + static const char foreground_color[]; + static const char background_color[]; + static const char reset_color[5]; + static const wchar_t wreset_color[5]; + static const char signs[]; +}; + +FMT_EXTERN template struct basic_data; + +// This is a struct rather than an alias to avoid shadowing warnings in gcc. +struct data : basic_data<> {}; + +#ifdef FMT_BUILTIN_CLZLL +// Returns the number of decimal digits in n. Leading zeros are not counted +// except for n == 0 in which case count_digits returns 1. +inline int count_digits(uint64_t n) { + // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10 + // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits. + int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12; + return t - (n < data::zero_or_powers_of_10_64[t]) + 1; +} +#else +// Fallback version of count_digits used when __builtin_clz is not available. +inline int count_digits(uint64_t n) { + int count = 1; + for (;;) { + // Integer division is slow so do it for a group of four digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + if (n < 10) return count; + if (n < 100) return count + 1; + if (n < 1000) return count + 2; + if (n < 10000) return count + 3; + n /= 10000u; + count += 4; + } +} +#endif + +#if FMT_USE_INT128 +inline int count_digits(uint128_t n) { + int count = 1; + for (;;) { + // Integer division is slow so do it for a group of four digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + if (n < 10) return count; + if (n < 100) return count + 1; + if (n < 1000) return count + 2; + if (n < 10000) return count + 3; + n /= 10000U; + count += 4; + } +} +#endif + +// Counts the number of digits in n. BITS = log2(radix). +template inline int count_digits(UInt n) { + int num_digits = 0; + do { + ++num_digits; + } while ((n >>= BITS) != 0); + return num_digits; +} + +template <> int count_digits<4>(internal::fallback_uintptr n); + +#if FMT_GCC_VERSION || FMT_CLANG_VERSION +# define FMT_ALWAYS_INLINE inline __attribute__((always_inline)) +#else +# define FMT_ALWAYS_INLINE +#endif + +#ifdef FMT_BUILTIN_CLZ +// Optional version of count_digits for better performance on 32-bit platforms. +inline int count_digits(uint32_t n) { + int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12; + return t - (n < data::zero_or_powers_of_10_32[t]) + 1; +} +#endif + +template FMT_API std::string grouping_impl(locale_ref loc); +template inline std::string grouping(locale_ref loc) { + return grouping_impl(loc); +} +template <> inline std::string grouping(locale_ref loc) { + return grouping_impl(loc); +} + +template FMT_API Char thousands_sep_impl(locale_ref loc); +template inline Char thousands_sep(locale_ref loc) { + return Char(thousands_sep_impl(loc)); +} +template <> inline wchar_t thousands_sep(locale_ref loc) { + return thousands_sep_impl(loc); +} + +template FMT_API Char decimal_point_impl(locale_ref loc); +template inline Char decimal_point(locale_ref loc) { + return Char(decimal_point_impl(loc)); +} +template <> inline wchar_t decimal_point(locale_ref loc) { + return decimal_point_impl(loc); +} + +// Formats a decimal unsigned integer value writing into buffer. +// add_thousands_sep is called after writing each char to add a thousands +// separator if necessary. +template +inline Char* format_decimal(Char* buffer, UInt value, int num_digits, + F add_thousands_sep) { + FMT_ASSERT(num_digits >= 0, "invalid digit count"); + buffer += num_digits; + Char* end = buffer; + while (value >= 100) { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + auto index = static_cast((value % 100) * 2); + value /= 100; + *--buffer = static_cast(data::digits[index + 1]); + add_thousands_sep(buffer); + *--buffer = static_cast(data::digits[index]); + add_thousands_sep(buffer); + } + if (value < 10) { + *--buffer = static_cast('0' + value); + return end; + } + auto index = static_cast(value * 2); + *--buffer = static_cast(data::digits[index + 1]); + add_thousands_sep(buffer); + *--buffer = static_cast(data::digits[index]); + return end; +} + +template constexpr int digits10() FMT_NOEXCEPT { + return std::numeric_limits::digits10; +} +template <> constexpr int digits10() FMT_NOEXCEPT { return 38; } +template <> constexpr int digits10() FMT_NOEXCEPT { return 38; } + +template +inline Iterator format_decimal(Iterator out, UInt value, int num_digits, + F add_thousands_sep) { + FMT_ASSERT(num_digits >= 0, "invalid digit count"); + // Buffer should be large enough to hold all digits (<= digits10 + 1). + enum { max_size = digits10() + 1 }; + Char buffer[2 * max_size]; + auto end = format_decimal(buffer, value, num_digits, add_thousands_sep); + return internal::copy_str(buffer, end, out); +} + +template +inline It format_decimal(It out, UInt value, int num_digits) { + return format_decimal(out, value, num_digits, [](Char*) {}); +} + +template +inline Char* format_uint(Char* buffer, UInt value, int num_digits, + bool upper = false) { + buffer += num_digits; + Char* end = buffer; + do { + const char* digits = upper ? "0123456789ABCDEF" : data::hex_digits; + unsigned digit = (value & ((1 << BASE_BITS) - 1)); + *--buffer = static_cast(BASE_BITS < 4 ? static_cast('0' + digit) + : digits[digit]); + } while ((value >>= BASE_BITS) != 0); + return end; +} + +template +Char* format_uint(Char* buffer, internal::fallback_uintptr n, int num_digits, + bool = false) { + auto char_digits = std::numeric_limits::digits / 4; + int start = (num_digits + char_digits - 1) / char_digits - 1; + if (int start_digits = num_digits % char_digits) { + unsigned value = n.value[start--]; + buffer = format_uint(buffer, value, start_digits); + } + for (; start >= 0; --start) { + unsigned value = n.value[start]; + buffer += char_digits; + auto p = buffer; + for (int i = 0; i < char_digits; ++i) { + unsigned digit = (value & ((1 << BASE_BITS) - 1)); + *--p = static_cast(data::hex_digits[digit]); + value >>= BASE_BITS; + } + } + return buffer; +} + +template +inline It format_uint(It out, UInt value, int num_digits, bool upper = false) { + // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1). + char buffer[num_bits() / BASE_BITS + 1]; + format_uint(buffer, value, num_digits, upper); + return internal::copy_str(buffer, buffer + num_digits, out); +} + +// A converter from UTF-8 to UTF-16. +class utf8_to_utf16 { + private: + wmemory_buffer buffer_; + + public: + FMT_API explicit utf8_to_utf16(string_view s); + operator wstring_view() const { return {&buffer_[0], size()}; } + size_t size() const { return buffer_.size() - 1; } + const wchar_t* c_str() const { return &buffer_[0]; } + std::wstring str() const { return {&buffer_[0], size()}; } +}; + +template struct null {}; + +// Workaround an array initialization issue in gcc 4.8. +template struct fill_t { + private: + enum { max_size = 4 }; + Char data_[max_size]; + unsigned char size_; + + public: + FMT_CONSTEXPR void operator=(basic_string_view s) { + auto size = s.size(); + if (size > max_size) { + FMT_THROW(format_error("invalid fill")); + return; + } + for (size_t i = 0; i < size; ++i) data_[i] = s[i]; + size_ = static_cast(size); + } + + size_t size() const { return size_; } + const Char* data() const { return data_; } + + FMT_CONSTEXPR Char& operator[](size_t index) { return data_[index]; } + FMT_CONSTEXPR const Char& operator[](size_t index) const { + return data_[index]; + } + + static FMT_CONSTEXPR fill_t make() { + auto fill = fill_t(); + fill[0] = Char(' '); + fill.size_ = 1; + return fill; + } +}; +} // namespace internal + +// We cannot use enum classes as bit fields because of a gcc bug +// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414. +namespace align { +enum type { none, left, right, center, numeric }; +} +using align_t = align::type; + +namespace sign { +enum type { none, minus, plus, space }; +} +using sign_t = sign::type; + +// Format specifiers for built-in and string types. +template struct basic_format_specs { + int width; + int precision; + char type; + align_t align : 4; + sign_t sign : 3; + bool alt : 1; // Alternate form ('#'). + internal::fill_t fill; + + constexpr basic_format_specs() + : width(0), + precision(-1), + type(0), + align(align::none), + sign(sign::none), + alt(false), + fill(internal::fill_t::make()) {} +}; + +using format_specs = basic_format_specs; + +namespace internal { + +// A floating-point presentation format. +enum class float_format : unsigned char { + general, // General: exponent notation or fixed point based on magnitude. + exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3. + fixed, // Fixed point with the default precision of 6, e.g. 0.0012. + hex +}; + +struct float_specs { + int precision; + float_format format : 8; + sign_t sign : 8; + bool upper : 1; + bool locale : 1; + bool percent : 1; + bool binary32 : 1; + bool use_grisu : 1; + bool showpoint : 1; +}; + +// Writes the exponent exp in the form "[+-]d{2,3}" to buffer. +template It write_exponent(int exp, It it) { + FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range"); + if (exp < 0) { + *it++ = static_cast('-'); + exp = -exp; + } else { + *it++ = static_cast('+'); + } + if (exp >= 100) { + const char* top = data::digits + (exp / 100) * 2; + if (exp >= 1000) *it++ = static_cast(top[0]); + *it++ = static_cast(top[1]); + exp %= 100; + } + const char* d = data::digits + exp * 2; + *it++ = static_cast(d[0]); + *it++ = static_cast(d[1]); + return it; +} + +template class float_writer { + private: + // The number is given as v = digits_ * pow(10, exp_). + const char* digits_; + int num_digits_; + int exp_; + size_t size_; + float_specs specs_; + Char decimal_point_; + + template It prettify(It it) const { + // pow(10, full_exp - 1) <= v <= pow(10, full_exp). + int full_exp = num_digits_ + exp_; + if (specs_.format == float_format::exp) { + // Insert a decimal point after the first digit and add an exponent. + *it++ = static_cast(*digits_); + int num_zeros = specs_.precision - num_digits_; + if (num_digits_ > 1 || specs_.showpoint) *it++ = decimal_point_; + it = copy_str(digits_ + 1, digits_ + num_digits_, it); + if (num_zeros > 0 && specs_.showpoint) + it = std::fill_n(it, num_zeros, static_cast('0')); + *it++ = static_cast(specs_.upper ? 'E' : 'e'); + return write_exponent(full_exp - 1, it); + } + if (num_digits_ <= full_exp) { + // 1234e7 -> 12340000000[.0+] + it = copy_str(digits_, digits_ + num_digits_, it); + it = std::fill_n(it, full_exp - num_digits_, static_cast('0')); + if (specs_.showpoint || specs_.precision < 0) { + *it++ = decimal_point_; + int num_zeros = specs_.precision - full_exp; + if (num_zeros <= 0) { + if (specs_.format != float_format::fixed) + *it++ = static_cast('0'); + return it; + } +#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION + if (num_zeros > 1000) + throw std::runtime_error("fuzz mode - avoiding excessive cpu use"); +#endif + it = std::fill_n(it, num_zeros, static_cast('0')); + } + } else if (full_exp > 0) { + // 1234e-2 -> 12.34[0+] + it = copy_str(digits_, digits_ + full_exp, it); + if (!specs_.showpoint) { + // Remove trailing zeros. + int num_digits = num_digits_; + while (num_digits > full_exp && digits_[num_digits - 1] == '0') + --num_digits; + if (num_digits != full_exp) *it++ = decimal_point_; + return copy_str(digits_ + full_exp, digits_ + num_digits, it); + } + *it++ = decimal_point_; + it = copy_str(digits_ + full_exp, digits_ + num_digits_, it); + if (specs_.precision > num_digits_) { + // Add trailing zeros. + int num_zeros = specs_.precision - num_digits_; + it = std::fill_n(it, num_zeros, static_cast('0')); + } + } else { + // 1234e-6 -> 0.001234 + *it++ = static_cast('0'); + int num_zeros = -full_exp; + int num_digits = num_digits_; + if (num_digits == 0 && specs_.precision >= 0 && + specs_.precision < num_zeros) { + num_zeros = specs_.precision; + } + // Remove trailing zeros. + if (!specs_.showpoint) + while (num_digits > 0 && digits_[num_digits - 1] == '0') --num_digits; + if (num_zeros != 0 || num_digits != 0 || specs_.showpoint) { + *it++ = decimal_point_; + it = std::fill_n(it, num_zeros, static_cast('0')); + it = copy_str(digits_, digits_ + num_digits, it); + } + } + return it; + } + + public: + float_writer(const char* digits, int num_digits, int exp, float_specs specs, + Char decimal_point) + : digits_(digits), + num_digits_(num_digits), + exp_(exp), + specs_(specs), + decimal_point_(decimal_point) { + int full_exp = num_digits + exp - 1; + int precision = specs.precision > 0 ? specs.precision : 16; + if (specs_.format == float_format::general && + !(full_exp >= -4 && full_exp < precision)) { + specs_.format = float_format::exp; + } + size_ = prettify(counting_iterator()).count(); + size_ += specs.sign ? 1 : 0; + } + + size_t size() const { return size_; } + size_t width() const { return size(); } + + template void operator()(It&& it) { + if (specs_.sign) *it++ = static_cast(data::signs[specs_.sign]); + it = prettify(it); + } +}; + +template +int format_float(T value, int precision, float_specs specs, buffer& buf); + +// Formats a floating-point number with snprintf. +template +int snprintf_float(T value, int precision, float_specs specs, + buffer& buf); + +template T promote_float(T value) { return value; } +inline double promote_float(float value) { return static_cast(value); } + +template +FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler&& handler) { + switch (spec) { + case 0: + case 'd': + handler.on_dec(); + break; + case 'x': + case 'X': + handler.on_hex(); + break; + case 'b': + case 'B': + handler.on_bin(); + break; + case 'o': + handler.on_oct(); + break; + case 'n': + handler.on_num(); + break; + default: + handler.on_error(); + } +} + +template +FMT_CONSTEXPR float_specs parse_float_type_spec( + const basic_format_specs& specs, ErrorHandler&& eh = {}) { + auto result = float_specs(); + result.showpoint = specs.alt; + switch (specs.type) { + case 0: + result.format = float_format::general; + result.showpoint |= specs.precision > 0; + break; + case 'G': + result.upper = true; + FMT_FALLTHROUGH; + case 'g': + result.format = float_format::general; + break; + case 'E': + result.upper = true; + FMT_FALLTHROUGH; + case 'e': + result.format = float_format::exp; + result.showpoint |= specs.precision != 0; + break; + case 'F': + result.upper = true; + FMT_FALLTHROUGH; + case 'f': + result.format = float_format::fixed; + result.showpoint |= specs.precision != 0; + break; +#if FMT_DEPRECATED_PERCENT + case '%': + result.format = float_format::fixed; + result.percent = true; + break; +#endif + case 'A': + result.upper = true; + FMT_FALLTHROUGH; + case 'a': + result.format = float_format::hex; + break; + case 'n': + result.locale = true; + break; + default: + eh.on_error("invalid type specifier"); + break; + } + return result; +} + +template +FMT_CONSTEXPR void handle_char_specs(const basic_format_specs* specs, + Handler&& handler) { + if (!specs) return handler.on_char(); + if (specs->type && specs->type != 'c') return handler.on_int(); + if (specs->align == align::numeric || specs->sign != sign::none || specs->alt) + handler.on_error("invalid format specifier for char"); + handler.on_char(); +} + +template +FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler&& handler) { + if (spec == 0 || spec == 's') + handler.on_string(); + else if (spec == 'p') + handler.on_pointer(); + else + handler.on_error("invalid type specifier"); +} + +template +FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler&& eh) { + if (spec != 0 && spec != 's') eh.on_error("invalid type specifier"); +} + +template +FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler&& eh) { + if (spec != 0 && spec != 'p') eh.on_error("invalid type specifier"); +} + +template class int_type_checker : private ErrorHandler { + public: + FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {} + + FMT_CONSTEXPR void on_dec() {} + FMT_CONSTEXPR void on_hex() {} + FMT_CONSTEXPR void on_bin() {} + FMT_CONSTEXPR void on_oct() {} + FMT_CONSTEXPR void on_num() {} + + FMT_CONSTEXPR void on_error() { + ErrorHandler::on_error("invalid type specifier"); + } +}; + +template +class char_specs_checker : public ErrorHandler { + private: + char type_; + + public: + FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh) + : ErrorHandler(eh), type_(type) {} + + FMT_CONSTEXPR void on_int() { + handle_int_type_spec(type_, int_type_checker(*this)); + } + FMT_CONSTEXPR void on_char() {} +}; + +template +class cstring_type_checker : public ErrorHandler { + public: + FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh) + : ErrorHandler(eh) {} + + FMT_CONSTEXPR void on_string() {} + FMT_CONSTEXPR void on_pointer() {} +}; + +template +void arg_map::init(const basic_format_args& args) { + if (map_) return; + map_ = new entry[internal::to_unsigned(args.max_size())]; + if (args.is_packed()) { + for (int i = 0;; ++i) { + internal::type arg_type = args.type(i); + if (arg_type == internal::type::none_type) return; + if (arg_type == internal::type::named_arg_type) + push_back(args.values_[i]); + } + } + for (int i = 0, n = args.max_size(); i < n; ++i) { + auto type = args.args_[i].type_; + if (type == internal::type::named_arg_type) push_back(args.args_[i].value_); + } +} + +template struct nonfinite_writer { + sign_t sign; + const char* str; + static constexpr size_t str_size = 3; + + size_t size() const { return str_size + (sign ? 1 : 0); } + size_t width() const { return size(); } + + template void operator()(It&& it) const { + if (sign) *it++ = static_cast(data::signs[sign]); + it = copy_str(str, str + str_size, it); + } +}; + +template +OutputIt fill(OutputIt it, size_t n, const fill_t& fill) { + auto fill_size = fill.size(); + if (fill_size == 1) return std::fill_n(it, n, fill[0]); + for (size_t i = 0; i < n; ++i) it = std::copy_n(fill.data(), fill_size, it); + return it; +} + +// This template provides operations for formatting and writing data into a +// character range. +template class basic_writer { + public: + using char_type = typename Range::value_type; + using iterator = typename Range::iterator; + using format_specs = basic_format_specs; + + private: + iterator out_; // Output iterator. + locale_ref locale_; + + // Attempts to reserve space for n extra characters in the output range. + // Returns a pointer to the reserved range or a reference to out_. + auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) { + return internal::reserve(out_, n); + } + + template struct padded_int_writer { + size_t size_; + string_view prefix; + char_type fill; + std::size_t padding; + F f; + + size_t size() const { return size_; } + size_t width() const { return size_; } + + template void operator()(It&& it) const { + if (prefix.size() != 0) + it = copy_str(prefix.begin(), prefix.end(), it); + it = std::fill_n(it, padding, fill); + f(it); + } + }; + + // Writes an integer in the format + // + // where are written by f(it). + template + void write_int(int num_digits, string_view prefix, format_specs specs, F f) { + std::size_t size = prefix.size() + to_unsigned(num_digits); + char_type fill = specs.fill[0]; + std::size_t padding = 0; + if (specs.align == align::numeric) { + auto unsiged_width = to_unsigned(specs.width); + if (unsiged_width > size) { + padding = unsiged_width - size; + size = unsiged_width; + } + } else if (specs.precision > num_digits) { + size = prefix.size() + to_unsigned(specs.precision); + padding = to_unsigned(specs.precision - num_digits); + fill = static_cast('0'); + } + if (specs.align == align::none) specs.align = align::right; + write_padded(specs, padded_int_writer{size, prefix, fill, padding, f}); + } + + // Writes a decimal integer. + template void write_decimal(Int value) { + auto abs_value = static_cast>(value); + bool negative = is_negative(value); + // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer. + if (negative) abs_value = ~abs_value + 1; + int num_digits = count_digits(abs_value); + auto&& it = reserve((negative ? 1 : 0) + static_cast(num_digits)); + if (negative) *it++ = static_cast('-'); + it = format_decimal(it, abs_value, num_digits); + } + + // The handle_int_type_spec handler that writes an integer. + template struct int_writer { + using unsigned_type = uint32_or_64_or_128_t; + + basic_writer& writer; + const Specs& specs; + unsigned_type abs_value; + char prefix[4]; + unsigned prefix_size; + + string_view get_prefix() const { return string_view(prefix, prefix_size); } + + int_writer(basic_writer& w, Int value, const Specs& s) + : writer(w), + specs(s), + abs_value(static_cast(value)), + prefix_size(0) { + if (is_negative(value)) { + prefix[0] = '-'; + ++prefix_size; + abs_value = 0 - abs_value; + } else if (specs.sign != sign::none && specs.sign != sign::minus) { + prefix[0] = specs.sign == sign::plus ? '+' : ' '; + ++prefix_size; + } + } + + struct dec_writer { + unsigned_type abs_value; + int num_digits; + + template void operator()(It&& it) const { + it = internal::format_decimal(it, abs_value, num_digits); + } + }; + + void on_dec() { + int num_digits = count_digits(abs_value); + writer.write_int(num_digits, get_prefix(), specs, + dec_writer{abs_value, num_digits}); + } + + struct hex_writer { + int_writer& self; + int num_digits; + + template void operator()(It&& it) const { + it = format_uint<4, char_type>(it, self.abs_value, num_digits, + self.specs.type != 'x'); + } + }; + + void on_hex() { + if (specs.alt) { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = specs.type; + } + int num_digits = count_digits<4>(abs_value); + writer.write_int(num_digits, get_prefix(), specs, + hex_writer{*this, num_digits}); + } + + template struct bin_writer { + unsigned_type abs_value; + int num_digits; + + template void operator()(It&& it) const { + it = format_uint(it, abs_value, num_digits); + } + }; + + void on_bin() { + if (specs.alt) { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = static_cast(specs.type); + } + int num_digits = count_digits<1>(abs_value); + writer.write_int(num_digits, get_prefix(), specs, + bin_writer<1>{abs_value, num_digits}); + } + + void on_oct() { + int num_digits = count_digits<3>(abs_value); + if (specs.alt && specs.precision <= num_digits && abs_value != 0) { + // Octal prefix '0' is counted as a digit, so only add it if precision + // is not greater than the number of digits. + prefix[prefix_size++] = '0'; + } + writer.write_int(num_digits, get_prefix(), specs, + bin_writer<3>{abs_value, num_digits}); + } + + enum { sep_size = 1 }; + + struct num_writer { + unsigned_type abs_value; + int size; + const std::string& groups; + char_type sep; + + template void operator()(It&& it) const { + basic_string_view s(&sep, sep_size); + // Index of a decimal digit with the least significant digit having + // index 0. + int digit_index = 0; + std::string::const_iterator group = groups.cbegin(); + it = format_decimal( + it, abs_value, size, + [this, s, &group, &digit_index](char_type*& buffer) { + if (*group <= 0 || ++digit_index % *group != 0 || + *group == max_value()) + return; + if (group + 1 != groups.cend()) { + digit_index = 0; + ++group; + } + buffer -= s.size(); + std::uninitialized_copy(s.data(), s.data() + s.size(), + make_checked(buffer, s.size())); + }); + } + }; + + void on_num() { + std::string groups = grouping(writer.locale_); + if (groups.empty()) return on_dec(); + auto sep = thousands_sep(writer.locale_); + if (!sep) return on_dec(); + int num_digits = count_digits(abs_value); + int size = num_digits; + std::string::const_iterator group = groups.cbegin(); + while (group != groups.cend() && num_digits > *group && *group > 0 && + *group != max_value()) { + size += sep_size; + num_digits -= *group; + ++group; + } + if (group == groups.cend()) + size += sep_size * ((num_digits - 1) / groups.back()); + writer.write_int(size, get_prefix(), specs, + num_writer{abs_value, size, groups, sep}); + } + + FMT_NORETURN void on_error() { + FMT_THROW(format_error("invalid type specifier")); + } + }; + + template struct str_writer { + const Char* s; + size_t size_; + + size_t size() const { return size_; } + size_t width() const { + return count_code_points(basic_string_view(s, size_)); + } + + template void operator()(It&& it) const { + it = copy_str(s, s + size_, it); + } + }; + + struct bytes_writer { + string_view bytes; + + size_t size() const { return bytes.size(); } + size_t width() const { return bytes.size(); } + + template void operator()(It&& it) const { + const char* data = bytes.data(); + it = copy_str(data, data + size(), it); + } + }; + + template struct pointer_writer { + UIntPtr value; + int num_digits; + + size_t size() const { return to_unsigned(num_digits) + 2; } + size_t width() const { return size(); } + + template void operator()(It&& it) const { + *it++ = static_cast('0'); + *it++ = static_cast('x'); + it = format_uint<4, char_type>(it, value, num_digits); + } + }; + + public: + explicit basic_writer(Range out, locale_ref loc = locale_ref()) + : out_(out.begin()), locale_(loc) {} + + iterator out() const { return out_; } + + // Writes a value in the format + // + // where is written by f(it). + template void write_padded(const format_specs& specs, F&& f) { + // User-perceived width (in code points). + unsigned width = to_unsigned(specs.width); + size_t size = f.size(); // The number of code units. + size_t num_code_points = width != 0 ? f.width() : size; + if (width <= num_code_points) return f(reserve(size)); + size_t padding = width - num_code_points; + size_t fill_size = specs.fill.size(); + auto&& it = reserve(size + padding * fill_size); + if (specs.align == align::right) { + it = fill(it, padding, specs.fill); + f(it); + } else if (specs.align == align::center) { + std::size_t left_padding = padding / 2; + it = fill(it, left_padding, specs.fill); + f(it); + it = fill(it, padding - left_padding, specs.fill); + } else { + f(it); + it = fill(it, padding, specs.fill); + } + } + + void write(int value) { write_decimal(value); } + void write(long value) { write_decimal(value); } + void write(long long value) { write_decimal(value); } + + void write(unsigned value) { write_decimal(value); } + void write(unsigned long value) { write_decimal(value); } + void write(unsigned long long value) { write_decimal(value); } + +#if FMT_USE_INT128 + void write(int128_t value) { write_decimal(value); } + void write(uint128_t value) { write_decimal(value); } +#endif + + template + void write_int(T value, const Spec& spec) { + handle_int_type_spec(spec.type, int_writer(*this, value, spec)); + } + + template ::value)> + void write(T value, format_specs specs = {}) { + if (const_check(!is_supported_floating_point(value))) { + return; + } + float_specs fspecs = parse_float_type_spec(specs); + fspecs.sign = specs.sign; + if (std::signbit(value)) { // value < 0 is false for NaN so use signbit. + fspecs.sign = sign::minus; + value = -value; + } else if (fspecs.sign == sign::minus) { + fspecs.sign = sign::none; + } + + if (!std::isfinite(value)) { + auto str = std::isinf(value) ? (fspecs.upper ? "INF" : "inf") + : (fspecs.upper ? "NAN" : "nan"); + return write_padded(specs, nonfinite_writer{fspecs.sign, str}); + } + + if (specs.align == align::none) { + specs.align = align::right; + } else if (specs.align == align::numeric) { + if (fspecs.sign) { + auto&& it = reserve(1); + *it++ = static_cast(data::signs[fspecs.sign]); + fspecs.sign = sign::none; + if (specs.width != 0) --specs.width; + } + specs.align = align::right; + } + + memory_buffer buffer; + if (fspecs.format == float_format::hex) { + if (fspecs.sign) buffer.push_back(data::signs[fspecs.sign]); + snprintf_float(promote_float(value), specs.precision, fspecs, buffer); + write_padded(specs, str_writer{buffer.data(), buffer.size()}); + return; + } + int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6; + if (fspecs.format == float_format::exp) { + if (precision == max_value()) + FMT_THROW(format_error("number is too big")); + else + ++precision; + } + if (const_check(std::is_same())) fspecs.binary32 = true; + fspecs.use_grisu = use_grisu(); + if (const_check(FMT_DEPRECATED_PERCENT) && fspecs.percent) value *= 100; + int exp = format_float(promote_float(value), precision, fspecs, buffer); + if (const_check(FMT_DEPRECATED_PERCENT) && fspecs.percent) { + buffer.push_back('%'); + --exp; // Adjust decimal place position. + } + fspecs.precision = precision; + char_type point = fspecs.locale ? decimal_point(locale_) + : static_cast('.'); + write_padded(specs, float_writer(buffer.data(), + static_cast(buffer.size()), + exp, fspecs, point)); + } + + void write(char value) { + auto&& it = reserve(1); + *it++ = value; + } + + template ::value)> + void write(Char value) { + auto&& it = reserve(1); + *it++ = value; + } + + void write(string_view value) { + auto&& it = reserve(value.size()); + it = copy_str(value.begin(), value.end(), it); + } + void write(wstring_view value) { + static_assert(std::is_same::value, ""); + auto&& it = reserve(value.size()); + it = std::copy(value.begin(), value.end(), it); + } + + template + void write(const Char* s, std::size_t size, const format_specs& specs) { + write_padded(specs, str_writer{s, size}); + } + + template + void write(basic_string_view s, const format_specs& specs = {}) { + const Char* data = s.data(); + std::size_t size = s.size(); + if (specs.precision >= 0 && to_unsigned(specs.precision) < size) + size = code_point_index(s, to_unsigned(specs.precision)); + write(data, size, specs); + } + + void write_bytes(string_view bytes, const format_specs& specs) { + write_padded(specs, bytes_writer{bytes}); + } + + template + void write_pointer(UIntPtr value, const format_specs* specs) { + int num_digits = count_digits<4>(value); + auto pw = pointer_writer{value, num_digits}; + if (!specs) return pw(reserve(to_unsigned(num_digits) + 2)); + format_specs specs_copy = *specs; + if (specs_copy.align == align::none) specs_copy.align = align::right; + write_padded(specs_copy, pw); + } +}; + +using writer = basic_writer>; + +template struct is_integral : std::is_integral {}; +template <> struct is_integral : std::true_type {}; +template <> struct is_integral : std::true_type {}; + +template +class arg_formatter_base { + public: + using char_type = typename Range::value_type; + using iterator = typename Range::iterator; + using format_specs = basic_format_specs; + + private: + using writer_type = basic_writer; + writer_type writer_; + format_specs* specs_; + + struct char_writer { + char_type value; + + size_t size() const { return 1; } + size_t width() const { return 1; } + + template void operator()(It&& it) const { *it++ = value; } + }; + + void write_char(char_type value) { + if (specs_) + writer_.write_padded(*specs_, char_writer{value}); + else + writer_.write(value); + } + + void write_pointer(const void* p) { + writer_.write_pointer(internal::to_uintptr(p), specs_); + } + + protected: + writer_type& writer() { return writer_; } + FMT_DEPRECATED format_specs* spec() { return specs_; } + format_specs* specs() { return specs_; } + iterator out() { return writer_.out(); } + + void write(bool value) { + string_view sv(value ? "true" : "false"); + specs_ ? writer_.write(sv, *specs_) : writer_.write(sv); + } + + void write(const char_type* value) { + if (!value) { + FMT_THROW(format_error("string pointer is null")); + } else { + auto length = std::char_traits::length(value); + basic_string_view sv(value, length); + specs_ ? writer_.write(sv, *specs_) : writer_.write(sv); + } + } + + public: + arg_formatter_base(Range r, format_specs* s, locale_ref loc) + : writer_(r, loc), specs_(s) {} + + iterator operator()(monostate) { + FMT_ASSERT(false, "invalid argument type"); + return out(); + } + + template ::value)> + iterator operator()(T value) { + if (specs_) + writer_.write_int(value, *specs_); + else + writer_.write(value); + return out(); + } + + iterator operator()(char_type value) { + internal::handle_char_specs( + specs_, char_spec_handler(*this, static_cast(value))); + return out(); + } + + iterator operator()(bool value) { + if (specs_ && specs_->type) return (*this)(value ? 1 : 0); + write(value != 0); + return out(); + } + + template ::value)> + iterator operator()(T value) { + if (const_check(is_supported_floating_point(value))) + writer_.write(value, specs_ ? *specs_ : format_specs()); + else + FMT_ASSERT(false, "unsupported float argument type"); + return out(); + } + + struct char_spec_handler : ErrorHandler { + arg_formatter_base& formatter; + char_type value; + + char_spec_handler(arg_formatter_base& f, char_type val) + : formatter(f), value(val) {} + + void on_int() { + if (formatter.specs_) + formatter.writer_.write_int(value, *formatter.specs_); + else + formatter.writer_.write(value); + } + void on_char() { formatter.write_char(value); } + }; + + struct cstring_spec_handler : internal::error_handler { + arg_formatter_base& formatter; + const char_type* value; + + cstring_spec_handler(arg_formatter_base& f, const char_type* val) + : formatter(f), value(val) {} + + void on_string() { formatter.write(value); } + void on_pointer() { formatter.write_pointer(value); } + }; + + iterator operator()(const char_type* value) { + if (!specs_) return write(value), out(); + internal::handle_cstring_type_spec(specs_->type, + cstring_spec_handler(*this, value)); + return out(); + } + + iterator operator()(basic_string_view value) { + if (specs_) { + internal::check_string_type_spec(specs_->type, internal::error_handler()); + writer_.write(value, *specs_); + } else { + writer_.write(value); + } + return out(); + } + + iterator operator()(const void* value) { + if (specs_) + check_pointer_type_spec(specs_->type, internal::error_handler()); + write_pointer(value); + return out(); + } +}; + +template FMT_CONSTEXPR bool is_name_start(Char c) { + return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c; +} + +// Parses the range [begin, end) as an unsigned integer. This function assumes +// that the range is non-empty and the first character is a digit. +template +FMT_CONSTEXPR int parse_nonnegative_int(const Char*& begin, const Char* end, + ErrorHandler&& eh) { + FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', ""); + unsigned value = 0; + // Convert to unsigned to prevent a warning. + constexpr unsigned max_int = max_value(); + unsigned big = max_int / 10; + do { + // Check for overflow. + if (value > big) { + value = max_int + 1; + break; + } + value = value * 10 + unsigned(*begin - '0'); + ++begin; + } while (begin != end && '0' <= *begin && *begin <= '9'); + if (value > max_int) eh.on_error("number is too big"); + return static_cast(value); +} + +template class custom_formatter { + private: + using char_type = typename Context::char_type; + + basic_format_parse_context& parse_ctx_; + Context& ctx_; + + public: + explicit custom_formatter(basic_format_parse_context& parse_ctx, + Context& ctx) + : parse_ctx_(parse_ctx), ctx_(ctx) {} + + bool operator()(typename basic_format_arg::handle h) const { + h.format(parse_ctx_, ctx_); + return true; + } + + template bool operator()(T) const { return false; } +}; + +template +using is_integer = + bool_constant::value && !std::is_same::value && + !std::is_same::value && + !std::is_same::value>; + +template class width_checker { + public: + explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {} + + template ::value)> + FMT_CONSTEXPR unsigned long long operator()(T value) { + if (is_negative(value)) handler_.on_error("negative width"); + return static_cast(value); + } + + template ::value)> + FMT_CONSTEXPR unsigned long long operator()(T) { + handler_.on_error("width is not integer"); + return 0; + } + + private: + ErrorHandler& handler_; +}; + +template class precision_checker { + public: + explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {} + + template ::value)> + FMT_CONSTEXPR unsigned long long operator()(T value) { + if (is_negative(value)) handler_.on_error("negative precision"); + return static_cast(value); + } + + template ::value)> + FMT_CONSTEXPR unsigned long long operator()(T) { + handler_.on_error("precision is not integer"); + return 0; + } + + private: + ErrorHandler& handler_; +}; + +// A format specifier handler that sets fields in basic_format_specs. +template class specs_setter { + public: + explicit FMT_CONSTEXPR specs_setter(basic_format_specs& specs) + : specs_(specs) {} + + FMT_CONSTEXPR specs_setter(const specs_setter& other) + : specs_(other.specs_) {} + + FMT_CONSTEXPR void on_align(align_t align) { specs_.align = align; } + FMT_CONSTEXPR void on_fill(basic_string_view fill) { + specs_.fill = fill; + } + FMT_CONSTEXPR void on_plus() { specs_.sign = sign::plus; } + FMT_CONSTEXPR void on_minus() { specs_.sign = sign::minus; } + FMT_CONSTEXPR void on_space() { specs_.sign = sign::space; } + FMT_CONSTEXPR void on_hash() { specs_.alt = true; } + + FMT_CONSTEXPR void on_zero() { + specs_.align = align::numeric; + specs_.fill[0] = Char('0'); + } + + FMT_CONSTEXPR void on_width(int width) { specs_.width = width; } + FMT_CONSTEXPR void on_precision(int precision) { + specs_.precision = precision; + } + FMT_CONSTEXPR void end_precision() {} + + FMT_CONSTEXPR void on_type(Char type) { + specs_.type = static_cast(type); + } + + protected: + basic_format_specs& specs_; +}; + +template class numeric_specs_checker { + public: + FMT_CONSTEXPR numeric_specs_checker(ErrorHandler& eh, internal::type arg_type) + : error_handler_(eh), arg_type_(arg_type) {} + + FMT_CONSTEXPR void require_numeric_argument() { + if (!is_arithmetic_type(arg_type_)) + error_handler_.on_error("format specifier requires numeric argument"); + } + + FMT_CONSTEXPR void check_sign() { + require_numeric_argument(); + if (is_integral_type(arg_type_) && arg_type_ != type::int_type && + arg_type_ != type::long_long_type && arg_type_ != type::char_type) { + error_handler_.on_error("format specifier requires signed argument"); + } + } + + FMT_CONSTEXPR void check_precision() { + if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type) + error_handler_.on_error("precision not allowed for this argument type"); + } + + private: + ErrorHandler& error_handler_; + internal::type arg_type_; +}; + +// A format specifier handler that checks if specifiers are consistent with the +// argument type. +template class specs_checker : public Handler { + public: + FMT_CONSTEXPR specs_checker(const Handler& handler, internal::type arg_type) + : Handler(handler), checker_(*this, arg_type) {} + + FMT_CONSTEXPR specs_checker(const specs_checker& other) + : Handler(other), checker_(*this, other.arg_type_) {} + + FMT_CONSTEXPR void on_align(align_t align) { + if (align == align::numeric) checker_.require_numeric_argument(); + Handler::on_align(align); + } + + FMT_CONSTEXPR void on_plus() { + checker_.check_sign(); + Handler::on_plus(); + } + + FMT_CONSTEXPR void on_minus() { + checker_.check_sign(); + Handler::on_minus(); + } + + FMT_CONSTEXPR void on_space() { + checker_.check_sign(); + Handler::on_space(); + } + + FMT_CONSTEXPR void on_hash() { + checker_.require_numeric_argument(); + Handler::on_hash(); + } + + FMT_CONSTEXPR void on_zero() { + checker_.require_numeric_argument(); + Handler::on_zero(); + } + + FMT_CONSTEXPR void end_precision() { checker_.check_precision(); } + + private: + numeric_specs_checker checker_; +}; + +template