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Externals: update fmtlib to latest version (10.0.0)

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The library is used by OBJ/PLY exporters, and asset_catalog_tree_view.
Performance of OBJ/PLY export seems to be the same. Blender executable
gets a tiny bit smaller (-5kb) on windows.
This commit is contained in:
Aras Pranckevicius
2023-05-30 10:48:43 +03:00
parent 1be9d9cb63
commit 122c48aed0
9 changed files with 4139 additions and 3739 deletions
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2
extern/fmtlib/LICENSE.rst vendored
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@@ -1,4 +1,4 @@
Copyright (c) 2012 - present, Victor Zverovich
Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the

2
extern/fmtlib/README.blender vendored
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@@ -1,7 +1,7 @@
Project: {fmt}
URL: https://github.com/fmtlib/fmt
License: MIT
Upstream version: 8.1.1 (b6f4cea)
Upstream version: 10.0.0 (a0b8a92, 2023 May 10)
Local modifications:
- Took only files needed for Blender: LICENSE, README and include/fmt

56
extern/fmtlib/README.rst vendored
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@@ -1,5 +1,7 @@
{fmt}
=====
.. image:: https://user-images.githubusercontent.com/
576385/156254208-f5b743a9-88cf-439d-b0c0-923d53e8d551.png
:width: 25%
:alt: {fmt}
.. image:: https://github.com/fmtlib/fmt/workflows/linux/badge.svg
:target: https://github.com/fmtlib/fmt/actions?query=workflow%3Alinux
@@ -10,9 +12,6 @@
.. image:: https://github.com/fmtlib/fmt/workflows/windows/badge.svg
:target: https://github.com/fmtlib/fmt/actions?query=workflow%3Awindows
.. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v?svg=true
:target: https://ci.appveyor.com/project/vitaut/fmt
.. image:: https://oss-fuzz-build-logs.storage.googleapis.com/badges/fmt.svg
:alt: fmt is continuously fuzzed at oss-fuzz
:target: https://bugs.chromium.org/p/oss-fuzz/issues/list?\
@@ -26,12 +25,13 @@
**{fmt}** is an open-source formatting library providing a fast and safe
alternative to C stdio and C++ iostreams.
If you like this project, please consider donating to the BYSOL
Foundation that helps victims of political repressions in Belarus:
https://bysol.org/en/bs/general/.
If you like this project, please consider donating to one of the funds that
help victims of the war in Ukraine: https://www.stopputin.net/.
`Documentation <https://fmt.dev>`__
`Cheat Sheets <https://hackingcpp.com/cpp/libs/fmt.html>`__
Q&A: ask questions on `StackOverflow with the tag fmt
<https://stackoverflow.com/questions/tagged/fmt>`_.
@@ -47,7 +47,8 @@ Features
* `Format string syntax <https://fmt.dev/latest/syntax.html>`_ similar to Python's
`format <https://docs.python.org/3/library/stdtypes.html#str.format>`_
* Fast IEEE 754 floating-point formatter with correct rounding, shortness and
round-trip guarantees
round-trip guarantees using the `Dragonbox <https://github.com/jk-jeon/dragonbox>`_
algorithm
* Safe `printf implementation
<https://fmt.dev/latest/api.html#printf-formatting>`_ including the POSIX
extension for positional arguments
@@ -123,7 +124,7 @@ Output::
Default format: 42s 100ms
strftime-like format: 03:15:30
**Print a container** (`run <https://godbolt.org/z/MjsY7c>`_)
**Print a container** (`run <https://godbolt.org/z/MxM1YqjE7>`_)
.. code:: c++
@@ -191,24 +192,24 @@ 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
libc printf 0.91
libc++ std::ostream 2.49
{fmt} 9.1 fmt::print 0.74
Boost Format 1.80 boost::format 6.26
Folly Format folly::format 1.87
================= ============= ===========
{fmt} is the fastest of the benchmarked methods, ~35% faster than ``printf``.
{fmt} is the fastest of the benchmarked methods, ~20% faster than ``printf``.
The above results were generated by building ``tinyformat_test.cpp`` on macOS
10.14.6 with ``clang++ -O3 -DNDEBUG -DSPEED_TEST -DHAVE_FORMAT``, and taking the
12.6.1 with ``clang++ -O3 -DNDEBUG -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
<https://github.com/fmtlib/format-benchmark/blob/master/src/tinyformat-test.cc>`_.
{fmt} is up to 20-30x faster than ``std::ostringstream`` and ``sprintf`` on
floating-point formatting (`dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_)
IEEE754 ``float`` and ``double`` formatting (`dtoa-benchmark <https://github.com/fmtlib/dtoa-benchmark>`_)
and faster than `double-conversion <https://github.com/google/double-conversion>`_ and
`ryu <https://github.com/ulfjack/ryu>`_:
@@ -322,8 +323,10 @@ Projects using this library
* `ccache <https://ccache.dev/>`_: a compiler cache
* `ClickHouse <https://github.com/ClickHouse/ClickHouse>`_: analytical database
* `ClickHouse <https://github.com/ClickHouse/ClickHouse>`_: an analytical database
management system
* `Contour <https://github.com/contour-terminal/contour/>`_: a modern terminal emulator
* `CUAUV <https://cuauv.org/>`_: Cornell University's autonomous underwater
vehicle
@@ -341,9 +344,12 @@ Projects using this library
* `Folly <https://github.com/facebook/folly>`_: Facebook open-source library
* `GemRB <https://gemrb.org/>`_: a portable open-source implementation of
Bioware’s Infinity Engine
* `Grand Mountain Adventure
<https://store.steampowered.com/app/1247360/Grand_Mountain_Adventure/>`_:
A beautiful open-world ski & snowboarding game
a beautiful open-world ski & snowboarding game
* `HarpyWar/pvpgn <https://github.com/pvpgn/pvpgn-server>`_:
Player vs Player Gaming Network with tweaks
@@ -357,6 +363,10 @@ Projects using this library
* `Knuth <https://kth.cash/>`_: high-performance Bitcoin full-node
* `libunicode <https://github.com/contour-terminal/libunicode/>`_: a modern C++17 Unicode library
* `MariaDB <https://mariadb.org/>`_: relational database management system
* `Microsoft Verona <https://github.com/microsoft/verona>`_:
research programming language for concurrent ownership
@@ -410,6 +420,9 @@ Projects using this library
* `TrinityCore <https://github.com/TrinityCore/TrinityCore>`_: open-source
MMORPG framework
* `🐙 userver framework <https://userver.tech/>`_: open-source asynchronous
framework with a rich set of abstractions and database drivers
* `Windows Terminal <https://github.com/microsoft/terminal>`_: the new Windows
terminal
@@ -520,8 +533,7 @@ Maintainers
-----------
The {fmt} library is maintained by Victor Zverovich (`vitaut
<https://github.com/vitaut>`_) and Jonathan Müller (`foonathan
<https://github.com/foonathan>`_) with contributions from many other people.
<https://github.com/vitaut>`_) with contributions from many other people.
See `Contributors <https://github.com/fmtlib/fmt/graphs/contributors>`_ and
`Releases <https://github.com/fmtlib/fmt/releases>`_ for some of the names.
Let us know if your contribution is not listed or mentioned incorrectly and

2013
extern/fmtlib/include/fmt/core.h vendored
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@@ -10,14 +10,14 @@
#include <cstddef> // std::byte
#include <cstdio> // std::FILE
#include <cstring>
#include <cstring> // std::strlen
#include <iterator>
#include <limits>
#include <string>
#include <type_traits>
// The fmt library version in the form major * 10000 + minor * 100 + patch.
#define FMT_VERSION 80101
#define FMT_VERSION 100000
#if defined(__clang__) && !defined(__ibmxl__)
# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
@@ -49,29 +49,27 @@
# define FMT_ICC_VERSION 0
#endif
#ifdef __NVCC__
# define FMT_NVCC __NVCC__
#else
# define FMT_NVCC 0
#endif
#ifdef _MSC_VER
# define FMT_MSC_VER _MSC_VER
# define FMT_MSC_VERSION _MSC_VER
# define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
#else
# define FMT_MSC_VER 0
# define FMT_MSC_VERSION 0
# define FMT_MSC_WARNING(...)
#endif
#ifdef _MSVC_LANG
# define FMT_CPLUSPLUS _MSVC_LANG
#else
# define FMT_CPLUSPLUS __cplusplus
#endif
#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__) || FMT_MSC_VER > 1900) && \
(!FMT_ICC_VERSION || FMT_ICC_VERSION >= 1600)
#if defined(__has_include) || FMT_ICC_VERSION >= 1600 || FMT_MSC_VERSION > 1900
# define FMT_HAS_INCLUDE(x) __has_include(x)
#else
# define FMT_HAS_INCLUDE(x) 0
@@ -83,12 +81,6 @@
# define FMT_HAS_CPP_ATTRIBUTE(x) 0
#endif
#ifdef _MSVC_LANG
# define FMT_CPLUSPLUS _MSVC_LANG
#else
# define FMT_CPLUSPLUS __cplusplus
#endif
#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
(FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
@@ -98,37 +90,38 @@
// 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 >= 1912 || \
(FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) && \
!FMT_NVCC && !FMT_ICC_VERSION
# if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \
(FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) && \
!FMT_ICC_VERSION && !defined(__NVCC__)
# define FMT_USE_CONSTEXPR 1
# else
# define FMT_USE_CONSTEXPR 0
# endif
#endif
#if FMT_USE_CONSTEXPR
# define FMT_CONSTEXPR constexpr
# define FMT_CONSTEXPR_DECL constexpr
#else
# define FMT_CONSTEXPR
# define FMT_CONSTEXPR_DECL
#endif
#if ((__cplusplus >= 202002L) && \
#if ((FMT_CPLUSPLUS >= 202002L) && \
(!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE > 9)) || \
(__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
(FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)
# define FMT_CONSTEXPR20 constexpr
#else
# define FMT_CONSTEXPR20
#endif
// Check if constexpr std::char_traits<>::compare,length is supported.
// Check if constexpr std::char_traits<>::{compare,length} are supported.
#if defined(__GLIBCXX__)
# if __cplusplus >= 201703L && defined(_GLIBCXX_RELEASE) && \
# if FMT_CPLUSPLUS >= 201703L && defined(_GLIBCXX_RELEASE) && \
_GLIBCXX_RELEASE >= 7 // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
# endif
#elif defined(_LIBCPP_VERSION) && __cplusplus >= 201703L && \
#elif defined(_LIBCPP_VERSION) && FMT_CPLUSPLUS >= 201703L && \
_LIBCPP_VERSION >= 4000
# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
#elif FMT_MSC_VER >= 1914 && _MSVC_LANG >= 201703L
#elif FMT_MSC_VERSION >= 1914 && FMT_CPLUSPLUS >= 201703L
# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
#endif
#ifndef FMT_CONSTEXPR_CHAR_TRAITS
@@ -138,61 +131,21 @@
// Check if exceptions are disabled.
#ifndef FMT_EXCEPTIONS
# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
FMT_MSC_VER && !_HAS_EXCEPTIONS
(FMT_MSC_VERSION && !_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_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
// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \
!defined(__NVCC__)
# define FMT_NORETURN [[noreturn]]
#else
# define FMT_NORETURN
#endif
#if __cplusplus == 201103L || __cplusplus == 201402L
# if defined(__INTEL_COMPILER) || defined(__PGI)
# define FMT_FALLTHROUGH
# elif defined(__clang__)
# define FMT_FALLTHROUGH [[clang::fallthrough]]
# elif FMT_GCC_VERSION >= 700 && \
(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
# define FMT_FALLTHROUGH [[gnu::fallthrough]]
# else
# define FMT_FALLTHROUGH
# endif
#elif FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
# define FMT_FALLTHROUGH [[fallthrough]]
#else
# define FMT_FALLTHROUGH
#endif
#ifndef FMT_NODISCARD
# if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
# define FMT_NODISCARD [[nodiscard]]
@@ -201,16 +154,6 @@
# 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
#ifndef FMT_INLINE
# if FMT_GCC_VERSION || FMT_CLANG_VERSION
# define FMT_INLINE inline __attribute__((always_inline))
@@ -219,24 +162,20 @@
# endif
#endif
#ifndef FMT_DEPRECATED
# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900
# define FMT_DEPRECATED [[deprecated]]
# else
# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
# define FMT_DEPRECATED __attribute__((deprecated))
# elif FMT_MSC_VER
# define FMT_DEPRECATED __declspec(deprecated)
# else
# define FMT_DEPRECATED /* deprecated */
# endif
# endif
// An inline std::forward replacement.
#define FMT_FORWARD(...) static_cast<decltype(__VA_ARGS__)&&>(__VA_ARGS__)
#ifdef _MSC_VER
# define FMT_UNCHECKED_ITERATOR(It) \
using _Unchecked_type = It // Mark iterator as checked.
#else
# define FMT_UNCHECKED_ITERATOR(It) using unchecked_type = It
#endif
#ifndef FMT_BEGIN_NAMESPACE
# define FMT_BEGIN_NAMESPACE \
namespace fmt { \
inline namespace v8 {
inline namespace v10 {
# define FMT_END_NAMESPACE \
} \
}
@@ -244,22 +183,18 @@
#ifndef FMT_MODULE_EXPORT
# define FMT_MODULE_EXPORT
# define FMT_MODULE_EXPORT_BEGIN
# define FMT_MODULE_EXPORT_END
# define FMT_BEGIN_DETAIL_NAMESPACE namespace detail {
# define FMT_END_DETAIL_NAMESPACE }
# define FMT_BEGIN_EXPORT
# define FMT_END_EXPORT
#endif
#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
# define FMT_CLASS_API FMT_MSC_WARNING(suppress : 4275)
# ifdef FMT_EXPORT
# ifdef FMT_LIB_EXPORT
# define FMT_API __declspec(dllexport)
# elif defined(FMT_SHARED)
# define FMT_API __declspec(dllimport)
# endif
#else
# define FMT_CLASS_API
# if defined(FMT_EXPORT) || defined(FMT_SHARED)
# if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
# if defined(__GNUC__) || defined(__clang__)
# define FMT_API __attribute__((visibility("default")))
# endif
@@ -270,26 +205,27 @@
#endif
// libc++ supports string_view in pre-c++17.
#if (FMT_HAS_INCLUDE(<string_view>) && \
(__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
#if FMT_HAS_INCLUDE(<string_view>) && \
(FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
# include <string_view>
# define FMT_USE_STRING_VIEW
#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L
# include <experimental/string_view>
# define FMT_USE_EXPERIMENTAL_STRING_VIEW
#endif
#ifndef FMT_UNICODE
# define FMT_UNICODE !FMT_MSC_VER
# define FMT_UNICODE !FMT_MSC_VERSION
#endif
#ifndef FMT_CONSTEVAL
# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
__cplusplus > 201703L && !defined(__apple_build_version__)) || \
(defined(__cpp_consteval) && \
(!FMT_MSC_VER || _MSC_FULL_VER >= 193030704))
// consteval is broken in MSVC before VS2022 and Apple clang 13.
# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
(!defined(__apple_build_version__) || \
__apple_build_version__ >= 14000029L) && \
FMT_CPLUSPLUS >= 202002L) || \
(defined(__cpp_consteval) && \
(!FMT_MSC_VERSION || _MSC_FULL_VER >= 193030704))
// consteval is broken in MSVC before VS2022 and Apple clang before 14.
# define FMT_CONSTEVAL consteval
# define FMT_HAS_CONSTEVAL
# else
@@ -297,24 +233,31 @@
# endif
#endif
#ifndef FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
# if defined(__cpp_nontype_template_args) && \
((FMT_GCC_VERSION >= 903 && __cplusplus >= 201709L) || \
__cpp_nontype_template_args >= 201911L)
# define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 1
#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS
# if defined(__cpp_nontype_template_args) && \
((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \
__cpp_nontype_template_args >= 201911L) && \
!defined(__NVCOMPILER) && !defined(__LCC__)
# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
# else
# define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 0
# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
# endif
#endif
#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
# define FMT_INLINE_VARIABLE inline
#else
# define FMT_INLINE_VARIABLE
#endif
// Enable minimal optimizations for more compact code in debug mode.
FMT_GCC_PRAGMA("GCC push_options")
#ifndef __OPTIMIZE__
#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER) && !defined(__LCC__) && \
!defined(__CUDACC__)
FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
#endif
FMT_BEGIN_NAMESPACE
FMT_MODULE_EXPORT_BEGIN
// Implementations of enable_if_t and other metafunctions for older systems.
template <bool B, typename T = void>
@@ -330,6 +273,8 @@ template <typename T>
using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
template <typename T> struct type_identity { using type = T; };
template <typename T> using type_identity_t = typename type_identity<T>::type;
template <typename T>
using underlying_t = typename std::underlying_type<T>::type;
struct monostate {
constexpr monostate() {}
@@ -341,19 +286,32 @@ struct monostate {
#ifdef FMT_DOC
# define FMT_ENABLE_IF(...)
#else
# define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0
# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
#endif
FMT_BEGIN_DETAIL_NAMESPACE
#ifdef __cpp_lib_byte
inline auto format_as(std::byte b) -> unsigned char {
return static_cast<unsigned char>(b);
}
#endif
// Suppress "unused variable" warnings with the method described in
namespace detail {
// Suppresses "unused variable" warnings with the method described in
// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
// (void)var does not work on many Intel compilers.
template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
constexpr FMT_INLINE auto is_constant_evaluated(bool default_value = false)
FMT_NOEXCEPT -> bool {
#ifdef __cpp_lib_is_constant_evaluated
constexpr FMT_INLINE auto is_constant_evaluated(
bool default_value = false) noexcept -> bool {
// Workaround for incompatibility between libstdc++ consteval-based
// std::is_constant_evaluated() implementation and clang-14.
// https://github.com/fmtlib/fmt/issues/3247
#if FMT_CPLUSPLUS >= 202002L && defined(_GLIBCXX_RELEASE) && \
_GLIBCXX_RELEASE >= 12 && \
(FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
ignore_unused(default_value);
return __builtin_is_constant_evaluated();
#elif defined(__cpp_lib_is_constant_evaluated)
ignore_unused(default_value);
return std::is_constant_evaluated();
#else
@@ -361,7 +319,7 @@ constexpr FMT_INLINE auto is_constant_evaluated(bool default_value = false)
#endif
}
// A function to suppress "conditional expression is constant" warnings.
// Suppresses "conditional expression is constant" warnings.
template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
return value;
}
@@ -371,23 +329,17 @@ FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
#ifndef FMT_ASSERT
# ifdef NDEBUG
// FMT_ASSERT is not empty to avoid -Werror=empty-body.
// FMT_ASSERT is not empty to avoid -Wempty-body.
# define FMT_ASSERT(condition, message) \
::fmt::detail::ignore_unused((condition), (message))
fmt::detail::ignore_unused((condition), (message))
# else
# define FMT_ASSERT(condition, message) \
((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
? (void)0 \
: ::fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
: fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
# endif
#endif
#ifdef __cpp_lib_byte
using byte = std::byte;
#else
enum class byte : unsigned char {};
#endif
#if defined(FMT_USE_STRING_VIEW)
template <typename Char> using std_string_view = std::basic_string_view<Char>;
#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
@@ -399,11 +351,11 @@ template <typename T> struct std_string_view {};
#ifdef FMT_USE_INT128
// Do nothing.
#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \
!(FMT_CLANG_VERSION && FMT_MSC_VER)
#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
!(FMT_CLANG_VERSION && FMT_MSC_VERSION)
# define FMT_USE_INT128 1
using int128_t = __int128_t;
using uint128_t = __uint128_t;
using int128_opt = __int128_t; // An optional native 128-bit integer.
using uint128_opt = __uint128_t;
template <typename T> inline auto convert_for_visit(T value) -> T {
return value;
}
@@ -411,32 +363,29 @@ template <typename T> inline auto convert_for_visit(T value) -> T {
# define FMT_USE_INT128 0
#endif
#if !FMT_USE_INT128
enum class int128_t {};
enum class uint128_t {};
enum class int128_opt {};
enum class uint128_opt {};
// Reduce template instantiations.
template <typename T> inline auto convert_for_visit(T) -> monostate {
return {};
}
template <typename T> auto convert_for_visit(T) -> monostate { return {}; }
#endif
// Casts a nonnegative integer to unsigned.
template <typename Int>
FMT_CONSTEXPR auto to_unsigned(Int value) ->
typename std::make_unsigned<Int>::type {
FMT_ASSERT(value >= 0, "negative value");
FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
return static_cast<typename std::make_unsigned<Int>::type>(value);
}
FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char micro[] = "\u00B5";
FMT_CONSTEXPR inline auto is_utf8() -> bool {
FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char section[] = "\u00A7";
constexpr auto is_utf8() -> bool {
// Avoid buggy sign extensions in MSVC's constant evaluation mode.
// https://developercommunity.visualstudio.com/t/C-difference-in-behavior-for-unsigned/1233612
// Avoid buggy sign extensions in MSVC's constant evaluation mode (#2297).
using uchar = unsigned char;
return FMT_UNICODE || (sizeof(micro) == 3 && uchar(micro[0]) == 0xC2 &&
uchar(micro[1]) == 0xB5);
return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 &&
uchar(section[1]) == 0xA7);
}
FMT_END_DETAIL_NAMESPACE
} // namespace detail
/**
An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
@@ -445,6 +394,7 @@ FMT_END_DETAIL_NAMESPACE
compiled with a different ``-std`` option than the client code (which is not
recommended).
*/
FMT_MODULE_EXPORT
template <typename Char> class basic_string_view {
private:
const Char* data_;
@@ -454,12 +404,11 @@ template <typename Char> class basic_string_view {
using value_type = Char;
using iterator = const Char*;
constexpr basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {}
constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
/** Constructs a string reference object from a C string and a size. */
constexpr basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT
: data_(s),
size_(count) {}
constexpr basic_string_view(const Char* s, size_t count) noexcept
: data_(s), size_(count) {}
/**
\rst
@@ -479,33 +428,44 @@ template <typename Char> class basic_string_view {
/** Constructs a string reference from a ``std::basic_string`` object. */
template <typename Traits, typename Alloc>
FMT_CONSTEXPR basic_string_view(
const std::basic_string<Char, Traits, Alloc>& s) FMT_NOEXCEPT
: data_(s.data()),
size_(s.size()) {}
const std::basic_string<Char, Traits, Alloc>& s) noexcept
: data_(s.data()), size_(s.size()) {}
template <typename S, FMT_ENABLE_IF(std::is_same<
S, detail::std_string_view<Char>>::value)>
FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()),
size_(s.size()) {}
FMT_CONSTEXPR basic_string_view(S s) noexcept
: data_(s.data()), size_(s.size()) {}
/** Returns a pointer to the string data. */
constexpr auto data() const FMT_NOEXCEPT -> const Char* { return data_; }
constexpr auto data() const noexcept -> const Char* { return data_; }
/** Returns the string size. */
constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
constexpr auto size() const noexcept -> size_t { return size_; }
constexpr auto begin() const FMT_NOEXCEPT -> iterator { return data_; }
constexpr auto end() const FMT_NOEXCEPT -> iterator { return data_ + size_; }
constexpr auto begin() const noexcept -> iterator { return data_; }
constexpr auto end() const noexcept -> iterator { return data_ + size_; }
constexpr auto operator[](size_t pos) const FMT_NOEXCEPT -> const Char& {
constexpr auto operator[](size_t pos) const noexcept -> const Char& {
return data_[pos];
}
FMT_CONSTEXPR void remove_prefix(size_t n) FMT_NOEXCEPT {
FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
data_ += n;
size_ -= n;
}
FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(
basic_string_view<Char> sv) const noexcept {
return size_ >= sv.size_ &&
std::char_traits<Char>::compare(data_, sv.data_, sv.size_) == 0;
}
FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(Char c) const noexcept {
return size_ >= 1 && std::char_traits<Char>::eq(*data_, c);
}
FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(const Char* s) const {
return starts_with(basic_string_view<Char>(s));
}
// Lexicographically compare this string reference to other.
FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
size_t str_size = size_ < other.size_ ? size_ : other.size_;
@@ -537,13 +497,22 @@ template <typename Char> class basic_string_view {
}
};
FMT_MODULE_EXPORT
using string_view = basic_string_view<char>;
/** Specifies if ``T`` is a character type. Can be specialized by users. */
FMT_MODULE_EXPORT
template <typename T> struct is_char : std::false_type {};
template <> struct is_char<char> : std::true_type {};
// Returns a string view of `s`.
namespace detail {
// A base class for compile-time strings.
struct compile_string {};
template <typename S>
struct is_compile_string : std::is_base_of<compile_string, S> {};
template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
return s;
@@ -559,36 +528,24 @@ constexpr auto to_string_view(basic_string_view<Char> s)
return s;
}
template <typename Char,
FMT_ENABLE_IF(!std::is_empty<detail::std_string_view<Char>>::value)>
inline auto to_string_view(detail::std_string_view<Char> s)
-> basic_string_view<Char> {
FMT_ENABLE_IF(!std::is_empty<std_string_view<Char>>::value)>
inline auto to_string_view(std_string_view<Char> s) -> basic_string_view<Char> {
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_STRING("{}"), 42).
struct compile_string {};
template <typename S>
struct is_compile_string : std::is_base_of<compile_string, S> {};
template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
constexpr auto to_string_view(const S& s)
-> basic_string_view<typename S::char_type> {
return basic_string_view<typename S::char_type>(s);
}
FMT_BEGIN_DETAIL_NAMESPACE
void to_string_view(...);
using fmt::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.
// ADL is intentionally disabled as to_string_view is not an extension point.
template <typename S>
struct is_string : std::is_class<decltype(to_string_view(std::declval<S>()))> {
};
struct is_string
: std::is_class<decltype(detail::to_string_view(std::declval<S>()))> {};
template <typename S, typename = void> struct char_t_impl {};
template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
@@ -596,28 +553,91 @@ template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
using type = typename result::value_type;
};
// Reports a compile-time error if S is not a valid format string.
template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
FMT_INLINE void check_format_string(const S&) {
#ifdef FMT_ENFORCE_COMPILE_STRING
static_assert(is_compile_string<S>::value,
"FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
"FMT_STRING.");
#endif
enum class type {
none_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 <typename T, typename Char>
struct type_constant : std::integral_constant<type, type::custom_type> {};
#define FMT_TYPE_CONSTANT(Type, constant) \
template <typename Char> \
struct type_constant<Type, Char> \
: std::integral_constant<type, type::constant> {}
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_opt, int128_type);
FMT_TYPE_CONSTANT(uint128_opt, 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<Char>, string_type);
FMT_TYPE_CONSTANT(const void*, pointer_type);
constexpr bool is_integral_type(type t) {
return t > type::none_type && t <= type::last_integer_type;
}
template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
void check_format_string(S);
constexpr bool is_arithmetic_type(type t) {
return t > type::none_type && t <= type::last_numeric_type;
}
constexpr auto set(type rhs) -> int { return 1 << static_cast<int>(rhs); }
constexpr auto in(type t, int set) -> bool {
return ((set >> static_cast<int>(t)) & 1) != 0;
}
// Bitsets of types.
enum {
sint_set =
set(type::int_type) | set(type::long_long_type) | set(type::int128_type),
uint_set = set(type::uint_type) | set(type::ulong_long_type) |
set(type::uint128_type),
bool_set = set(type::bool_type),
char_set = set(type::char_type),
float_set = set(type::float_type) | set(type::double_type) |
set(type::long_double_type),
string_set = set(type::string_type),
cstring_set = set(type::cstring_type),
pointer_set = set(type::pointer_type)
};
FMT_NORETURN FMT_API void throw_format_error(const char* message);
struct error_handler {
constexpr error_handler() = default;
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);
FMT_NORETURN void on_error(const char* message) {
throw_format_error(message);
}
};
FMT_END_DETAIL_NAMESPACE
} // namespace detail
/** String's character type. */
template <typename S> using char_t = typename detail::char_t_impl<S>::type;
@@ -629,35 +649,34 @@ template <typename S> using char_t = typename detail::char_t_impl<S>::type;
You can use the ``format_parse_context`` type alias for ``char`` instead.
\endrst
*/
template <typename Char, typename ErrorHandler = detail::error_handler>
class basic_format_parse_context : private ErrorHandler {
FMT_MODULE_EXPORT
template <typename Char> class basic_format_parse_context {
private:
basic_string_view<Char> format_str_;
int next_arg_id_;
FMT_CONSTEXPR void do_check_arg_id(int id);
public:
using char_type = Char;
using iterator = typename basic_string_view<Char>::iterator;
using iterator = const Char*;
explicit constexpr basic_format_parse_context(
basic_string_view<Char> format_str, ErrorHandler eh = {},
int next_arg_id = 0)
: ErrorHandler(eh), format_str_(format_str), next_arg_id_(next_arg_id) {}
basic_string_view<Char> format_str, int next_arg_id = 0)
: format_str_(format_str), next_arg_id_(next_arg_id) {}
/**
Returns an iterator to the beginning of the format string range being
parsed.
*/
constexpr auto begin() const FMT_NOEXCEPT -> iterator {
constexpr auto begin() const noexcept -> iterator {
return format_str_.begin();
}
/**
Returns an iterator past the end of the format string range being parsed.
*/
constexpr auto end() const FMT_NOEXCEPT -> iterator {
return format_str_.end();
}
constexpr auto end() const noexcept -> iterator { return format_str_.end(); }
/** Advances the begin iterator to ``it``. */
FMT_CONSTEXPR void advance_to(iterator it) {
@@ -669,40 +688,104 @@ class basic_format_parse_context : private ErrorHandler {
the next argument index and switches to the automatic indexing.
*/
FMT_CONSTEXPR auto next_arg_id() -> int {
// Don't check if the argument id is valid to avoid overhead and because it
// will be checked during formatting anyway.
if (next_arg_id_ >= 0) return next_arg_id_++;
on_error("cannot switch from manual to automatic argument indexing");
return 0;
if (next_arg_id_ < 0) {
detail::throw_format_error(
"cannot switch from manual to automatic argument indexing");
return 0;
}
int id = next_arg_id_++;
do_check_arg_id(id);
return id;
}
/**
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(int id) {
if (next_arg_id_ > 0) {
detail::throw_format_error(
"cannot switch from automatic to manual argument indexing");
return;
}
next_arg_id_ = -1;
do_check_arg_id(id);
}
FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
FMT_CONSTEXPR void on_error(const char* message) {
ErrorHandler::on_error(message);
}
constexpr auto error_handler() const -> ErrorHandler { return *this; }
FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
};
FMT_MODULE_EXPORT
using format_parse_context = basic_format_parse_context<char>;
template <typename Context> class basic_format_arg;
template <typename Context> class basic_format_args;
template <typename Context> class dynamic_format_arg_store;
namespace detail {
// A parse context with extra data used only in compile-time checks.
template <typename Char>
class compile_parse_context : public basic_format_parse_context<Char> {
private:
int num_args_;
const type* types_;
using base = basic_format_parse_context<Char>;
public:
explicit FMT_CONSTEXPR compile_parse_context(
basic_string_view<Char> format_str, int num_args, const type* types,
int next_arg_id = 0)
: base(format_str, next_arg_id), num_args_(num_args), types_(types) {}
constexpr auto num_args() const -> int { return num_args_; }
constexpr auto arg_type(int id) const -> type { return types_[id]; }
FMT_CONSTEXPR auto next_arg_id() -> int {
int id = base::next_arg_id();
if (id >= num_args_) throw_format_error("argument not found");
return id;
}
FMT_CONSTEXPR void check_arg_id(int id) {
base::check_arg_id(id);
if (id >= num_args_) throw_format_error("argument not found");
}
using base::check_arg_id;
FMT_CONSTEXPR void check_dynamic_spec(int arg_id) {
detail::ignore_unused(arg_id);
#if !defined(__LCC__)
if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id]))
throw_format_error("width/precision is not integer");
#endif
}
};
} // namespace detail
template <typename Char>
FMT_CONSTEXPR void basic_format_parse_context<Char>::do_check_arg_id(int id) {
// Argument id is only checked at compile-time during parsing because
// formatting has its own validation.
if (detail::is_constant_evaluated() &&
(!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
using context = detail::compile_parse_context<Char>;
if (id >= static_cast<context*>(this)->num_args())
detail::throw_format_error("argument not found");
}
}
template <typename Char>
FMT_CONSTEXPR void basic_format_parse_context<Char>::check_dynamic_spec(
int arg_id) {
if (detail::is_constant_evaluated() &&
(!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
using context = detail::compile_parse_context<Char>;
static_cast<context*>(this)->check_dynamic_spec(arg_id);
}
}
FMT_MODULE_EXPORT template <typename Context> class basic_format_arg;
FMT_MODULE_EXPORT template <typename Context> class basic_format_args;
FMT_MODULE_EXPORT template <typename Context> class dynamic_format_arg_store;
// A formatter for objects of type T.
FMT_MODULE_EXPORT
template <typename T, typename Char = char, typename Enable = void>
struct formatter {
// A deleted default constructor indicates a disabled formatter.
@@ -722,7 +805,7 @@ struct is_contiguous<std::basic_string<Char>> : std::true_type {};
class appender;
FMT_BEGIN_DETAIL_NAMESPACE
namespace detail {
template <typename Context, typename T>
constexpr auto has_const_formatter_impl(T*)
@@ -744,10 +827,10 @@ constexpr auto has_const_formatter() -> bool {
template <typename Container>
inline auto get_container(std::back_insert_iterator<Container> it)
-> Container& {
using bi_iterator = std::back_insert_iterator<Container>;
struct accessor : bi_iterator {
accessor(bi_iterator iter) : bi_iterator(iter) {}
using bi_iterator::container;
using base = std::back_insert_iterator<Container>;
struct accessor : base {
accessor(base b) : base(b) {}
using base::container;
};
return *accessor(it).container;
}
@@ -765,7 +848,7 @@ template <typename Char, typename T, typename U,
FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
auto size = to_unsigned(end - begin);
memcpy(out, begin, size * sizeof(U));
if (size > 0) memcpy(out, begin, size * sizeof(U));
return out + size;
}
@@ -784,18 +867,16 @@ template <typename T> class buffer {
protected:
// Don't initialize ptr_ since it is not accessed to save a few cycles.
FMT_MSC_WARNING(suppress : 26495)
buffer(size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}
buffer(size_t sz) noexcept : size_(sz), capacity_(sz) {}
FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0,
size_t cap = 0) FMT_NOEXCEPT : ptr_(p),
size_(sz),
capacity_(cap) {}
FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) noexcept
: ptr_(p), size_(sz), capacity_(cap) {}
FMT_CONSTEXPR20 ~buffer() = default;
buffer(buffer&&) = default;
/** Sets the buffer data and capacity. */
FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT {
FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept {
ptr_ = buf_data;
capacity_ = buf_capacity;
}
@@ -810,23 +891,23 @@ template <typename T> class buffer {
buffer(const buffer&) = delete;
void operator=(const buffer&) = delete;
auto begin() FMT_NOEXCEPT -> T* { return ptr_; }
auto end() FMT_NOEXCEPT -> T* { return ptr_ + size_; }
FMT_INLINE auto begin() noexcept -> T* { return ptr_; }
FMT_INLINE auto end() noexcept -> T* { return ptr_ + size_; }
auto begin() const FMT_NOEXCEPT -> const T* { return ptr_; }
auto end() const FMT_NOEXCEPT -> const T* { return ptr_ + size_; }
FMT_INLINE auto begin() const noexcept -> const T* { return ptr_; }
FMT_INLINE auto end() const noexcept -> const T* { return ptr_ + size_; }
/** Returns the size of this buffer. */
constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
constexpr auto size() const noexcept -> size_t { return size_; }
/** Returns the capacity of this buffer. */
constexpr auto capacity() const FMT_NOEXCEPT -> size_t { return capacity_; }
constexpr auto capacity() const noexcept -> size_t { return capacity_; }
/** Returns a pointer to the buffer data. */
FMT_CONSTEXPR auto data() FMT_NOEXCEPT -> T* { return ptr_; }
FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; }
/** Returns a pointer to the buffer data. */
FMT_CONSTEXPR auto data() const FMT_NOEXCEPT -> const T* { return ptr_; }
FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; }
/** Clears this buffer. */
void clear() { size_ = 0; }
@@ -854,11 +935,11 @@ template <typename T> class buffer {
/** Appends data to the end of the buffer. */
template <typename U> void append(const U* begin, const U* end);
template <typename I> FMT_CONSTEXPR auto operator[](I index) -> T& {
template <typename Idx> FMT_CONSTEXPR auto operator[](Idx index) -> T& {
return ptr_[index];
}
template <typename I>
FMT_CONSTEXPR auto operator[](I index) const -> const T& {
template <typename Idx>
FMT_CONSTEXPR auto operator[](Idx index) const -> const T& {
return ptr_[index];
}
};
@@ -993,6 +1074,7 @@ class iterator_buffer<std::back_insert_iterator<Container>,
: buffer<typename Container::value_type>(c.size()), container_(c) {}
explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
: iterator_buffer(get_container(out)) {}
auto out() -> std::back_insert_iterator<Container> {
return std::back_inserter(container_);
}
@@ -1027,25 +1109,21 @@ template <typename T, typename OutputIt>
auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
return iterator_buffer<OutputIt, T>(out);
}
template <typename T, typename Buf,
FMT_ENABLE_IF(std::is_base_of<buffer<char>, Buf>::value)>
auto get_buffer(std::back_insert_iterator<Buf> out) -> buffer<char>& {
return get_container(out);
}
template <typename Buffer>
auto get_iterator(Buffer& buf) -> decltype(buf.out()) {
template <typename Buf, typename OutputIt>
FMT_INLINE auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) {
return buf.out();
}
template <typename T> auto get_iterator(buffer<T>& buf) -> buffer_appender<T> {
return buffer_appender<T>(buf);
template <typename T, typename OutputIt>
auto get_iterator(buffer<T>&, OutputIt out) -> OutputIt {
return out;
}
template <typename T, typename Char = char, typename Enable = void>
struct fallback_formatter {
fallback_formatter() = delete;
};
// Specifies if T has an enabled fallback_formatter specialization.
template <typename T, typename Char>
using has_fallback_formatter =
std::is_constructible<fallback_formatter<T, Char>>;
struct view {};
template <typename Char, typename T> struct named_arg : view {
@@ -1128,64 +1206,8 @@ constexpr auto count_statically_named_args() -> size_t {
return count<is_statically_named_arg<Args>::value...>();
}
enum class type {
none_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 <typename T, typename Char>
struct type_constant : std::integral_constant<type, type::custom_type> {};
#define FMT_TYPE_CONSTANT(Type, constant) \
template <typename Char> \
struct type_constant<Type, Char> \
: std::integral_constant<type, type::constant> {}
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<Char>, string_type);
FMT_TYPE_CONSTANT(const void*, pointer_type);
constexpr bool is_integral_type(type t) {
return t > type::none_type && t <= type::last_integer_type;
}
constexpr bool is_arithmetic_type(type t) {
return t > type::none_type && t <= type::last_numeric_type;
}
struct unformattable {};
struct unformattable_char : unformattable {};
struct unformattable_const : unformattable {};
struct unformattable_pointer : unformattable {};
template <typename Char> struct string_value {
@@ -1215,8 +1237,8 @@ template <typename Context> class value {
unsigned uint_value;
long long long_long_value;
unsigned long long ulong_long_value;
int128_t int128_value;
uint128_t uint128_value;
int128_opt int128_value;
uint128_opt uint128_value;
bool bool_value;
char_type char_value;
float float_value;
@@ -1233,8 +1255,8 @@ template <typename Context> class value {
constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
FMT_INLINE value(int128_t val) : int128_value(val) {}
FMT_INLINE value(uint128_t val) : uint128_value(val) {}
FMT_INLINE value(int128_opt val) : int128_value(val) {}
FMT_INLINE value(uint128_opt val) : uint128_value(val) {}
constexpr FMT_INLINE value(float val) : float_value(val) {}
constexpr FMT_INLINE value(double val) : double_value(val) {}
FMT_INLINE value(long double val) : long_double_value(val) {}
@@ -1259,14 +1281,10 @@ template <typename Context> class value {
// have different extension points, e.g. `formatter<T>` for `format` and
// `printf_formatter<T>` for `printf`.
custom.format = format_custom_arg<
value_type,
conditional_t<has_formatter<value_type, Context>::value,
typename Context::template formatter_type<value_type>,
fallback_formatter<value_type, char_type>>>;
value_type, typename Context::template formatter_type<value_type>>;
}
value(unformattable);
value(unformattable_char);
value(unformattable_const);
value(unformattable_pointer);
private:
@@ -1284,7 +1302,7 @@ template <typename Context> class value {
};
template <typename Context, typename T>
FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context>;
FMT_CONSTEXPR auto make_arg(T&& value) -> basic_format_arg<Context>;
// 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.
@@ -1292,6 +1310,20 @@ enum { long_short = sizeof(long) == sizeof(int) };
using long_type = conditional_t<long_short, int, long long>;
using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
template <typename T> struct format_as_result {
template <typename U,
FMT_ENABLE_IF(std::is_enum<U>::value || std::is_class<U>::value)>
static auto map(U*) -> decltype(format_as(std::declval<U>()));
static auto map(...) -> void;
using type = decltype(map(static_cast<T*>(nullptr)));
};
template <typename T> using format_as_t = typename format_as_result<T>::type;
template <typename T>
struct has_format_as
: bool_constant<!std::is_same<format_as_t<T>, void>::value> {};
// Maps formatting arguments to core types.
// arg_mapper reports errors by returning unformattable instead of using
// static_assert because it's used in the is_formattable trait.
@@ -1317,8 +1349,12 @@ template <typename Context> struct arg_mapper {
-> unsigned long long {
return val;
}
FMT_CONSTEXPR FMT_INLINE auto map(int128_t val) -> int128_t { return val; }
FMT_CONSTEXPR FMT_INLINE auto map(uint128_t val) -> uint128_t { return val; }
FMT_CONSTEXPR FMT_INLINE auto map(int128_opt val) -> int128_opt {
return val;
}
FMT_CONSTEXPR FMT_INLINE auto map(uint128_opt val) -> uint128_opt {
return val;
}
FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
@@ -1363,46 +1399,6 @@ template <typename Context> struct arg_mapper {
FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
return {};
}
template <typename T,
FMT_ENABLE_IF(
std::is_constructible<basic_string_view<char_type>, T>::value &&
!is_string<T>::value && !has_formatter<T, Context>::value &&
!has_fallback_formatter<T, char_type>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-> basic_string_view<char_type> {
return basic_string_view<char_type>(val);
}
template <
typename T,
FMT_ENABLE_IF(
std::is_constructible<std_string_view<char_type>, T>::value &&
!std::is_constructible<basic_string_view<char_type>, T>::value &&
!is_string<T>::value && !has_formatter<T, Context>::value &&
!has_fallback_formatter<T, char_type>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-> basic_string_view<char_type> {
return std_string_view<char_type>(val);
}
using cstring_result = conditional_t<std::is_same<char_type, char>::value,
const char*, unformattable_pointer>;
FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const signed char* val)
-> cstring_result {
return map(reinterpret_cast<const char*>(val));
}
FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const unsigned char* val)
-> cstring_result {
return map(reinterpret_cast<const char*>(val));
}
FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(signed char* val)
-> cstring_result {
return map(reinterpret_cast<const char*>(val));
}
FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(unsigned char* val)
-> cstring_result {
return map(reinterpret_cast<const char*>(val));
}
FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
@@ -1412,15 +1408,16 @@ template <typename Context> struct arg_mapper {
return val;
}
// We use SFINAE instead of a const T* parameter to avoid conflicting with
// the C array overload.
// Use SFINAE instead of a const T* parameter to avoid a conflict with the
// array overload.
template <
typename T,
FMT_ENABLE_IF(
std::is_member_pointer<T>::value ||
std::is_pointer<T>::value || std::is_member_pointer<T>::value ||
std::is_function<typename std::remove_pointer<T>::type>::value ||
(std::is_convertible<const T&, const void*>::value &&
!std::is_convertible<const T&, const char_type*>::value))>
!std::is_convertible<const T&, const char_type*>::value &&
!has_formatter<T, Context>::value))>
FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
return {};
}
@@ -1431,48 +1428,34 @@ template <typename Context> struct arg_mapper {
return values;
}
template <typename T,
FMT_ENABLE_IF(
std::is_enum<T>::value&& std::is_convertible<T, int>::value &&
!has_formatter<T, Context>::value &&
!has_fallback_formatter<T, char_type>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-> decltype(std::declval<arg_mapper>().map(
static_cast<typename std::underlying_type<T>::type>(val))) {
return map(static_cast<typename std::underlying_type<T>::type>(val));
}
FMT_CONSTEXPR FMT_INLINE auto map(detail::byte val) -> unsigned {
return map(static_cast<unsigned char>(val));
// Only map owning types because mapping views can be unsafe.
template <typename T, typename U = format_as_t<T>,
FMT_ENABLE_IF(std::is_arithmetic<U>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& val) -> decltype(this->map(U())) {
return map(format_as(val));
}
template <typename T, typename U = remove_cvref_t<T>>
struct formattable
: bool_constant<has_const_formatter<U, Context>() ||
!std::is_const<remove_reference_t<T>>::value ||
has_fallback_formatter<U, char_type>::value> {};
(has_formatter<U, Context>::value &&
!std::is_const<remove_reference_t<T>>::value)> {};
#if FMT_MSC_VER != 0 && FMT_MSC_VER < 1910
// Workaround a bug in MSVC.
template <typename T> FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
return val;
}
#else
template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
return val;
}
template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
FMT_CONSTEXPR FMT_INLINE auto do_map(T&&) -> unformattable_const {
FMT_CONSTEXPR FMT_INLINE auto do_map(T&&) -> unformattable {
return {};
}
#endif
template <typename T, typename U = remove_cvref_t<T>,
FMT_ENABLE_IF(!is_string<U>::value && !is_char<U>::value &&
!std::is_array<U>::value &&
(has_formatter<U, Context>::value ||
has_fallback_formatter<U, char_type>::value))>
FMT_ENABLE_IF((std::is_class<U>::value || std::is_enum<U>::value ||
std::is_union<U>::value) &&
!is_string<U>::value && !is_char<U>::value &&
!is_named_arg<U>::value &&
!std::is_arithmetic<format_as_t<U>>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(T&& val)
-> decltype(this->do_map(std::forward<T>(val))) {
return do_map(std::forward<T>(val));
@@ -1480,7 +1463,7 @@ template <typename Context> struct arg_mapper {
template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
-> decltype(std::declval<arg_mapper>().map(named_arg.value)) {
-> decltype(this->map(named_arg.value)) {
return map(named_arg.value);
}
@@ -1498,27 +1481,20 @@ enum { packed_arg_bits = 4 };
enum { max_packed_args = 62 / packed_arg_bits };
enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
FMT_END_DETAIL_NAMESPACE
} // namespace detail
// An output iterator that appends to a buffer.
// It is used to reduce symbol sizes for the common case.
class appender : public std::back_insert_iterator<detail::buffer<char>> {
using base = std::back_insert_iterator<detail::buffer<char>>;
template <typename T>
friend auto get_buffer(appender out) -> detail::buffer<char>& {
return detail::get_container(out);
}
public:
using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
appender(base it) FMT_NOEXCEPT : base(it) {}
using _Unchecked_type = appender; // Mark iterator as checked.
appender(base it) noexcept : base(it) {}
FMT_UNCHECKED_ITERATOR(appender);
auto operator++() FMT_NOEXCEPT -> appender& { return *this; }
auto operator++(int) FMT_NOEXCEPT -> appender { return *this; }
auto operator++() noexcept -> appender& { return *this; }
auto operator++(int) noexcept -> appender { return *this; }
};
// A formatting argument. It is a trivially copyable/constructible type to
@@ -1529,7 +1505,7 @@ template <typename Context> class basic_format_arg {
detail::type type_;
template <typename ContextType, typename T>
friend FMT_CONSTEXPR auto detail::make_arg(const T& value)
friend FMT_CONSTEXPR auto detail::make_arg(T&& value)
-> basic_format_arg<ContextType>;
template <typename Visitor, typename Ctx>
@@ -1564,7 +1540,7 @@ template <typename Context> class basic_format_arg {
constexpr basic_format_arg() : type_(detail::type::none_type) {}
constexpr explicit operator bool() const FMT_NOEXCEPT {
constexpr explicit operator bool() const noexcept {
return type_ != detail::type::none_type;
}
@@ -1583,6 +1559,7 @@ template <typename Context> class basic_format_arg {
``vis(value)`` will be called with the value of type ``double``.
\endrst
*/
FMT_MODULE_EXPORT
template <typename Visitor, typename Context>
FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
@@ -1624,7 +1601,7 @@ FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
return vis(monostate());
}
FMT_BEGIN_DETAIL_NAMESPACE
namespace detail {
template <typename Char, typename InputIt>
auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
@@ -1632,11 +1609,15 @@ auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
return out;
}
template <typename Char, typename R, typename OutputIt>
FMT_CONSTEXPR auto copy_str(R&& rng, OutputIt out) -> OutputIt {
return detail::copy_str<Char>(rng.begin(), rng.end(), out);
}
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
template <typename... Ts> struct void_t_impl { using type = void; };
template <typename... Ts>
using void_t = typename detail::void_t_impl<Ts...>::type;
template <typename...> struct void_t_impl { using type = void; };
template <typename... T> using void_t = typename void_t_impl<T...>::type;
#else
template <typename...> using void_t = void;
#endif
@@ -1651,13 +1632,12 @@ struct is_output_iterator<
decltype(*std::declval<It>() = std::declval<T>())>>
: std::true_type {};
template <typename OutputIt>
struct is_back_insert_iterator : std::false_type {};
template <typename It> struct is_back_insert_iterator : std::false_type {};
template <typename Container>
struct is_back_insert_iterator<std::back_insert_iterator<Container>>
: std::true_type {};
template <typename OutputIt>
template <typename It>
struct is_contiguous_back_insert_iterator : std::false_type {};
template <typename Container>
struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
@@ -1665,16 +1645,16 @@ struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
template <>
struct is_contiguous_back_insert_iterator<appender> : std::true_type {};
// A type-erased reference to an std::locale to avoid heavy <locale> include.
// A type-erased reference to an std::locale to avoid a heavy <locale> include.
class locale_ref {
private:
const void* locale_; // A type-erased pointer to std::locale.
public:
constexpr locale_ref() : locale_(nullptr) {}
constexpr FMT_INLINE locale_ref() : locale_(nullptr) {}
template <typename Locale> explicit locale_ref(const Locale& loc);
explicit operator bool() const FMT_NOEXCEPT { return locale_ != nullptr; }
explicit operator bool() const noexcept { return locale_ != nullptr; }
template <typename Locale> auto get() const -> Locale;
};
@@ -1690,40 +1670,23 @@ constexpr auto encode_types() -> unsigned long long {
}
template <typename Context, typename T>
FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context> {
basic_format_arg<Context> arg;
arg.type_ = mapped_type_constant<T, Context>::value;
arg.value_ = arg_mapper<Context>().map(value);
return arg;
}
// The type template parameter is there to avoid an ODR violation when using
// a fallback formatter in one translation unit and an implicit conversion in
// another (not recommended).
template <bool IS_PACKED, typename Context, type, typename T,
FMT_ENABLE_IF(IS_PACKED)>
FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
const auto& arg = arg_mapper<Context>().map(std::forward<T>(val));
FMT_CONSTEXPR FMT_INLINE auto make_value(T&& val) -> value<Context> {
auto&& arg = arg_mapper<Context>().map(FMT_FORWARD(val));
using arg_type = remove_cvref_t<decltype(arg)>;
constexpr bool formattable_char =
!std::is_same<decltype(arg), const unformattable_char&>::value;
!std::is_same<arg_type, unformattable_char>::value;
static_assert(formattable_char, "Mixing character types is disallowed.");
constexpr bool formattable_const =
!std::is_same<decltype(arg), const unformattable_const&>::value;
static_assert(formattable_const, "Cannot format a const argument.");
// 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.
// Formatting of arbitrary pointers is disallowed. If you want to format a
// pointer cast it to `void*` or `const void*`. In particular, this forbids
// formatting of `[const] volatile char*` printed as bool by iostreams.
constexpr bool formattable_pointer =
!std::is_same<decltype(arg), const unformattable_pointer&>::value;
!std::is_same<arg_type, unformattable_pointer>::value;
static_assert(formattable_pointer,
"Formatting of non-void pointers is disallowed.");
constexpr bool formattable =
!std::is_same<decltype(arg), const unformattable&>::value;
constexpr bool formattable = !std::is_same<arg_type, unformattable>::value;
static_assert(
formattable,
"Cannot format an argument. To make type T formattable provide a "
@@ -1731,19 +1694,33 @@ FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
return {arg};
}
template <typename Context, typename T>
FMT_CONSTEXPR auto make_arg(T&& value) -> basic_format_arg<Context> {
auto arg = basic_format_arg<Context>();
arg.type_ = mapped_type_constant<T, Context>::value;
arg.value_ = make_value<Context>(value);
return arg;
}
// The DEPRECATED type template parameter is there to avoid an ODR violation
// when using a fallback formatter in one translation unit and an implicit
// conversion in another (not recommended).
template <bool IS_PACKED, typename Context, type, typename T,
FMT_ENABLE_IF(IS_PACKED)>
FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
return make_value<Context>(val);
}
template <bool IS_PACKED, typename Context, type, typename T,
FMT_ENABLE_IF(!IS_PACKED)>
inline auto make_arg(const T& value) -> basic_format_arg<Context> {
FMT_CONSTEXPR inline auto make_arg(T&& value) -> basic_format_arg<Context> {
return make_arg<Context>(value);
}
FMT_END_DETAIL_NAMESPACE
} // namespace detail
FMT_BEGIN_EXPORT
// Formatting context.
template <typename OutputIt, typename Char> class basic_format_context {
public:
/** The character type for the output. */
using char_type = Char;
private:
OutputIt out_;
basic_format_args<basic_format_context> args_;
@@ -1752,31 +1729,32 @@ template <typename OutputIt, typename Char> class basic_format_context {
public:
using iterator = OutputIt;
using format_arg = basic_format_arg<basic_format_context>;
using format_args = basic_format_args<basic_format_context>;
using parse_context_type = basic_format_parse_context<Char>;
template <typename T> using formatter_type = formatter<T, char_type>;
template <typename T> using formatter_type = formatter<T, Char>;
/** The character type for the output. */
using char_type = Char;
basic_format_context(basic_format_context&&) = default;
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.
Constructs a ``basic_format_context`` object. References to the arguments
are stored in the object so make sure they have appropriate lifetimes.
*/
constexpr basic_format_context(
OutputIt out, basic_format_args<basic_format_context> ctx_args,
detail::locale_ref loc = detail::locale_ref())
constexpr basic_format_context(OutputIt out, format_args ctx_args,
detail::locale_ref loc = {})
: out_(out), args_(ctx_args), loc_(loc) {}
constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
FMT_CONSTEXPR auto arg(basic_string_view<char_type> name) -> format_arg {
FMT_CONSTEXPR auto arg(basic_string_view<Char> name) -> format_arg {
return args_.get(name);
}
FMT_CONSTEXPR auto arg_id(basic_string_view<char_type> name) -> int {
FMT_CONSTEXPR auto arg_id(basic_string_view<Char> name) -> int {
return args_.get_id(name);
}
auto args() const -> const basic_format_args<basic_format_context>& {
return args_;
}
auto args() const -> const format_args& { return args_; }
FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
void on_error(const char* message) { error_handler().on_error(message); }
@@ -1797,16 +1775,10 @@ using buffer_context =
basic_format_context<detail::buffer_appender<Char>, Char>;
using format_context = buffer_context<char>;
// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164.
#define FMT_BUFFER_CONTEXT(Char) \
basic_format_context<detail::buffer_appender<Char>, Char>
template <typename T, typename Char = char>
using is_formattable = bool_constant<
!std::is_base_of<detail::unformattable,
decltype(detail::arg_mapper<buffer_context<Char>>().map(
std::declval<T>()))>::value &&
!detail::has_fallback_formatter<T, Char>::value>;
using is_formattable = bool_constant<!std::is_base_of<
detail::unformattable, decltype(detail::arg_mapper<buffer_context<Char>>()
.map(std::declval<T>()))>::value>;
/**
\rst
@@ -1853,7 +1825,7 @@ class format_arg_store
data_{detail::make_arg<
is_packed, Context,
detail::mapped_type_constant<remove_cvref_t<T>, Context>::value>(
std::forward<T>(args))...} {
FMT_FORWARD(args))...} {
detail::init_named_args(data_.named_args(), 0, 0, args...);
}
};
@@ -1866,10 +1838,10 @@ class format_arg_store
See `~fmt::arg` for lifetime considerations.
\endrst
*/
template <typename Context = format_context, typename... Args>
constexpr auto make_format_args(Args&&... args)
-> format_arg_store<Context, remove_cvref_t<Args>...> {
return {std::forward<Args>(args)...};
template <typename Context = format_context, typename... T>
constexpr auto make_format_args(T&&... args)
-> format_arg_store<Context, remove_cvref_t<T>...> {
return {FMT_FORWARD(args)...};
}
/**
@@ -1888,6 +1860,7 @@ inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
static_assert(!detail::is_named_arg<T>(), "nested named arguments");
return {name, arg};
}
FMT_END_EXPORT
/**
\rst
@@ -2013,20 +1986,28 @@ template <typename Context> class basic_format_args {
/** An alias to ``basic_format_args<format_context>``. */
// A separate type would result in shorter symbols but break ABI compatibility
// between clang and gcc on ARM (#1919).
using format_args = basic_format_args<format_context>;
FMT_MODULE_EXPORT using format_args = basic_format_args<format_context>;
// We cannot use enum classes as bit fields because of a gcc bug
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
// We cannot use enum classes as bit fields because of a gcc bug, so we put them
// in namespaces instead (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414).
// Additionally, if an underlying type is specified, older gcc incorrectly warns
// that the type is too small. Both bugs are fixed in gcc 9.3.
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 903
# define FMT_ENUM_UNDERLYING_TYPE(type)
#else
# define FMT_ENUM_UNDERLYING_TYPE(type) : type
#endif
namespace align {
enum type { none, left, right, center, numeric };
enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, left, right, center,
numeric};
}
using align_t = align::type;
namespace sign {
enum type { none, minus, plus, space };
enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, minus, plus, space};
}
using sign_t = sign::type;
FMT_BEGIN_DETAIL_NAMESPACE
namespace detail {
// Workaround an array initialization issue in gcc 4.8.
template <typename Char> struct fill_t {
@@ -2038,7 +2019,7 @@ template <typename Char> struct fill_t {
public:
FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
auto size = s.size();
if (size > max_size) return throw_format_error("invalid fill");
FMT_ASSERT(size <= max_size, "invalid fill");
for (size_t i = 0; i < size; ++i) data_[i] = s[i];
size_ = static_cast<unsigned char>(size);
}
@@ -2051,11 +2032,10 @@ template <typename Char> struct fill_t {
return data_[index];
}
};
FMT_END_DETAIL_NAMESPACE
} // namespace detail
enum class presentation_type : unsigned char {
none,
// Integer types should go first,
dec, // 'd'
oct, // 'o'
hex_lower, // 'x'
@@ -2072,11 +2052,12 @@ enum class presentation_type : unsigned char {
general_upper, // 'G'
chr, // 'c'
string, // 's'
pointer // 'p'
pointer, // 'p'
debug // '?'
};
// Format specifiers for built-in and string types.
template <typename Char> struct basic_format_specs {
template <typename Char = char> struct format_specs {
int width;
int precision;
presentation_type type;
@@ -2086,7 +2067,7 @@ template <typename Char> struct basic_format_specs {
bool localized : 1;
detail::fill_t<Char> fill;
constexpr basic_format_specs()
constexpr format_specs()
: width(0),
precision(-1),
type(presentation_type::none),
@@ -2096,9 +2077,7 @@ template <typename Char> struct basic_format_specs {
localized(false) {}
};
using format_specs = basic_format_specs<char>;
FMT_BEGIN_DETAIL_NAMESPACE
namespace detail {
enum class arg_id_kind { none, index, name };
@@ -2119,7 +2098,7 @@ template <typename Char> struct arg_ref {
arg_id_kind kind;
union value {
FMT_CONSTEXPR value(int id = 0) : index{id} {}
FMT_CONSTEXPR value(int idx = 0) : index(idx) {}
FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
int index;
@@ -2128,129 +2107,30 @@ template <typename Char> struct arg_ref {
};
// Format specifiers with width and precision resolved at formatting rather
// than parsing time to allow re-using the same parsed specifiers with
// than parsing time to allow reusing the same parsed specifiers with
// different sets of arguments (precompilation of format strings).
template <typename Char>
struct dynamic_format_specs : basic_format_specs<Char> {
template <typename Char = char>
struct dynamic_format_specs : format_specs<Char> {
arg_ref<Char> width_ref;
arg_ref<Char> precision_ref;
};
struct auto_id {};
// A format specifier handler that sets fields in basic_format_specs.
template <typename Char> class specs_setter {
protected:
basic_format_specs<Char>& specs_;
public:
explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& 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<Char> fill) {
specs_.fill = fill;
}
FMT_CONSTEXPR void on_sign(sign_t s) { specs_.sign = s; }
FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
FMT_CONSTEXPR void on_localized() { specs_.localized = true; }
FMT_CONSTEXPR void on_zero() {
if (specs_.align == align::none) 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(presentation_type type) { specs_.type = type; }
};
// Format spec handler that saves references to arguments representing dynamic
// width and precision to be resolved at formatting time.
template <typename ParseContext>
class dynamic_specs_handler
: public specs_setter<typename ParseContext::char_type> {
public:
using char_type = typename ParseContext::char_type;
FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
ParseContext& ctx)
: specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
: specs_setter<char_type>(other),
specs_(other.specs_),
context_(other.context_) {}
template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
specs_.width_ref = make_arg_ref(arg_id);
}
template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
specs_.precision_ref = make_arg_ref(arg_id);
}
FMT_CONSTEXPR void on_error(const char* message) {
context_.on_error(message);
}
private:
dynamic_format_specs<char_type>& specs_;
ParseContext& context_;
using arg_ref_type = arg_ref<char_type>;
FMT_CONSTEXPR auto make_arg_ref(int arg_id) -> arg_ref_type {
context_.check_arg_id(arg_id);
return arg_ref_type(arg_id);
}
FMT_CONSTEXPR auto make_arg_ref(auto_id) -> arg_ref_type {
return arg_ref_type(context_.next_arg_id());
}
FMT_CONSTEXPR auto make_arg_ref(basic_string_view<char_type> arg_id)
-> arg_ref_type {
context_.check_arg_id(arg_id);
basic_string_view<char_type> format_str(
context_.begin(), to_unsigned(context_.end() - context_.begin()));
return arg_ref_type(arg_id);
}
};
template <typename Char> constexpr bool is_ascii_letter(Char c) {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
// Converts a character to ASCII. Returns a number > 127 on conversion failure.
// Converts a character to ASCII. Returns '\0' on conversion failure.
template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
constexpr auto to_ascii(Char value) -> Char {
return value;
constexpr auto to_ascii(Char c) -> char {
return c <= 0xff ? static_cast<char>(c) : '\0';
}
template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
constexpr auto to_ascii(Char value) ->
typename std::underlying_type<Char>::type {
return value;
constexpr auto to_ascii(Char c) -> char {
return c <= 0xff ? static_cast<char>(c) : '\0';
}
// Returns the number of code units in a code point or 1 on error.
template <typename Char>
FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
if (const_check(sizeof(Char) != 1)) return 1;
auto 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";
int len = lengths[static_cast<unsigned char>(*begin) >> 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.
return len + !len;
auto c = static_cast<unsigned char>(*begin);
return static_cast<int>((0x3a55000000000000ull >> (2 * (c >> 3))) & 0x3) + 1;
}
// Return the result via the out param to workaround gcc bug 77539.
@@ -2295,277 +2175,284 @@ FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
: error_value;
}
// Parses fill and alignment.
template <typename Char, typename Handler>
FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
Handler&& handler) -> const Char* {
FMT_ASSERT(begin != end, "");
auto align = align::none;
auto p = begin + code_point_length(begin);
if (p >= end) p = begin;
for (;;) {
switch (to_ascii(*p)) {
case '<':
align = align::left;
break;
case '>':
align = align::right;
break;
case '^':
align = align::center;
break;
default:
break;
}
if (align != align::none) {
if (p != begin) {
auto c = *begin;
if (c == '{')
return handler.on_error("invalid fill character '{'"), begin;
handler.on_fill(basic_string_view<Char>(begin, to_unsigned(p - begin)));
begin = p + 1;
} else
++begin;
handler.on_align(align);
break;
} else if (p == begin) {
break;
}
p = begin;
FMT_CONSTEXPR inline auto parse_align(char c) -> align_t {
switch (c) {
case '<':
return align::left;
case '>':
return align::right;
case '^':
return align::center;
}
return begin;
return align::none;
}
template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
template <typename Char> constexpr auto is_name_start(Char c) -> bool {
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_';
}
template <typename Char, typename IDHandler>
template <typename Char, typename Handler>
FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
IDHandler&& handler) -> const Char* {
FMT_ASSERT(begin != end, "");
Handler&& handler) -> const Char* {
Char c = *begin;
if (c >= '0' && c <= '9') {
int index = 0;
constexpr int max = (std::numeric_limits<int>::max)();
if (c != '0')
index =
parse_nonnegative_int(begin, end, (std::numeric_limits<int>::max)());
index = parse_nonnegative_int(begin, end, max);
else
++begin;
if (begin == end || (*begin != '}' && *begin != ':'))
handler.on_error("invalid format string");
throw_format_error("invalid format string");
else
handler(index);
handler.on_index(index);
return begin;
}
if (!is_name_start(c)) {
handler.on_error("invalid format string");
throw_format_error("invalid format string");
return begin;
}
auto it = begin;
do {
++it;
} while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
} while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9')));
handler.on_name({begin, to_unsigned(it - begin)});
return it;
}
template <typename Char, typename IDHandler>
template <typename Char, typename Handler>
FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
IDHandler&& handler) -> const Char* {
Handler&& handler) -> const Char* {
FMT_ASSERT(begin != end, "");
Char c = *begin;
if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
handler();
handler.on_auto();
return begin;
}
template <typename Char, typename Handler>
FMT_CONSTEXPR auto parse_width(const Char* begin, const Char* end,
Handler&& handler) -> const Char* {
using detail::auto_id;
struct width_adapter {
Handler& handler;
template <typename Char> struct dynamic_spec_id_handler {
basic_format_parse_context<Char>& ctx;
arg_ref<Char>& ref;
FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_width(id); }
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
handler.on_dynamic_width(id);
}
FMT_CONSTEXPR void on_error(const char* message) {
if (message) handler.on_error(message);
}
};
FMT_CONSTEXPR void on_auto() {
int id = ctx.next_arg_id();
ref = arg_ref<Char>(id);
ctx.check_dynamic_spec(id);
}
FMT_CONSTEXPR void on_index(int id) {
ref = arg_ref<Char>(id);
ctx.check_arg_id(id);
ctx.check_dynamic_spec(id);
}
FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
ref = arg_ref<Char>(id);
ctx.check_arg_id(id);
}
};
// Parses [integer | "{" [arg_id] "}"].
template <typename Char>
FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end,
int& value, arg_ref<Char>& ref,
basic_format_parse_context<Char>& ctx)
-> const Char* {
FMT_ASSERT(begin != end, "");
if ('0' <= *begin && *begin <= '9') {
int width = parse_nonnegative_int(begin, end, -1);
if (width != -1)
handler.on_width(width);
int val = parse_nonnegative_int(begin, end, -1);
if (val != -1)
value = val;
else
handler.on_error("number is too big");
throw_format_error("number is too big");
} else if (*begin == '{') {
++begin;
if (begin != end) begin = parse_arg_id(begin, end, width_adapter{handler});
if (begin == end || *begin != '}')
return handler.on_error("invalid format string"), begin;
++begin;
auto handler = dynamic_spec_id_handler<Char>{ctx, ref};
if (begin != end) begin = parse_arg_id(begin, end, handler);
if (begin != end && *begin == '}') return ++begin;
throw_format_error("invalid format string");
}
return begin;
}
template <typename Char, typename Handler>
FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
Handler&& handler) -> const Char* {
using detail::auto_id;
struct precision_adapter {
Handler& handler;
FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_precision(id); }
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
handler.on_dynamic_precision(id);
}
FMT_CONSTEXPR void on_error(const char* message) {
if (message) handler.on_error(message);
}
};
++begin;
auto c = begin != end ? *begin : Char();
if ('0' <= c && c <= '9') {
auto precision = parse_nonnegative_int(begin, end, -1);
if (precision != -1)
handler.on_precision(precision);
else
handler.on_error("number is too big");
} else if (c == '{') {
++begin;
if (begin != end)
begin = parse_arg_id(begin, end, precision_adapter{handler});
if (begin == end || *begin++ != '}')
return handler.on_error("invalid format string"), begin;
} else {
return handler.on_error("missing precision specifier"), begin;
}
handler.end_precision();
return begin;
}
template <typename Char>
FMT_CONSTEXPR auto parse_presentation_type(Char type) -> presentation_type {
switch (to_ascii(type)) {
case 'd':
return presentation_type::dec;
case 'o':
return presentation_type::oct;
case 'x':
return presentation_type::hex_lower;
case 'X':
return presentation_type::hex_upper;
case 'b':
return presentation_type::bin_lower;
case 'B':
return presentation_type::bin_upper;
case 'a':
return presentation_type::hexfloat_lower;
case 'A':
return presentation_type::hexfloat_upper;
case 'e':
return presentation_type::exp_lower;
case 'E':
return presentation_type::exp_upper;
case 'f':
return presentation_type::fixed_lower;
case 'F':
return presentation_type::fixed_upper;
case 'g':
return presentation_type::general_lower;
case 'G':
return presentation_type::general_upper;
case 'c':
return presentation_type::chr;
case 's':
return presentation_type::string;
case 'p':
return presentation_type::pointer;
default:
return presentation_type::none;
}
}
// Parses standard format specifiers and sends notifications about parsed
// components to handler.
template <typename Char, typename SpecHandler>
FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(const Char* begin,
const Char* end,
SpecHandler&& handler)
FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
int& value, arg_ref<Char>& ref,
basic_format_parse_context<Char>& ctx)
-> const Char* {
if (1 < end - begin && begin[1] == '}' && is_ascii_letter(*begin) &&
*begin != 'L') {
presentation_type type = parse_presentation_type(*begin++);
if (type == presentation_type::none)
handler.on_error("invalid type specifier");
handler.on_type(type);
++begin;
if (begin == end || *begin == '}') {
throw_format_error("invalid precision");
return begin;
}
return parse_dynamic_spec(begin, end, value, ref, ctx);
}
if (begin == end) return begin;
enum class state { start, align, sign, hash, zero, width, precision, locale };
begin = parse_align(begin, end, handler);
if (begin == end) return begin;
// Parse sign.
switch (to_ascii(*begin)) {
case '+':
handler.on_sign(sign::plus);
++begin;
break;
case '-':
handler.on_sign(sign::minus);
++begin;
break;
case ' ':
handler.on_sign(sign::space);
++begin;
break;
default:
break;
}
if (begin == end) return begin;
if (*begin == '#') {
handler.on_hash();
if (++begin == end) return begin;
}
// Parse zero flag.
if (*begin == '0') {
handler.on_zero();
if (++begin == end) return begin;
}
begin = parse_width(begin, end, handler);
if (begin == end) return begin;
// Parse precision.
if (*begin == '.') {
begin = parse_precision(begin, end, handler);
// Parses standard format specifiers.
template <typename Char>
FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(
const Char* begin, const Char* end, dynamic_format_specs<Char>& specs,
basic_format_parse_context<Char>& ctx, type arg_type) -> const Char* {
auto c = '\0';
if (end - begin > 1) {
auto next = to_ascii(begin[1]);
c = parse_align(next) == align::none ? to_ascii(*begin) : '\0';
} else {
if (begin == end) return begin;
c = to_ascii(*begin);
}
if (*begin == 'L') {
handler.on_localized();
++begin;
}
struct {
state current_state = state::start;
FMT_CONSTEXPR void operator()(state s, bool valid = true) {
if (current_state >= s || !valid)
throw_format_error("invalid format specifier");
current_state = s;
}
} enter_state;
// Parse type.
if (begin != end && *begin != '}') {
presentation_type type = parse_presentation_type(*begin++);
if (type == presentation_type::none)
handler.on_error("invalid type specifier");
handler.on_type(type);
using pres = presentation_type;
constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
struct {
const Char*& begin;
dynamic_format_specs<Char>& specs;
type arg_type;
FMT_CONSTEXPR auto operator()(pres type, int set) -> const Char* {
if (!in(arg_type, set)) throw_format_error("invalid format specifier");
specs.type = type;
return begin + 1;
}
} parse_presentation_type{begin, specs, arg_type};
for (;;) {
switch (c) {
case '<':
case '>':
case '^':
enter_state(state::align);
specs.align = parse_align(c);
++begin;
break;
case '+':
case '-':
case ' ':
enter_state(state::sign, in(arg_type, sint_set | float_set));
switch (c) {
case '+':
specs.sign = sign::plus;
break;
case '-':
specs.sign = sign::minus;
break;
case ' ':
specs.sign = sign::space;
break;
}
++begin;
break;
case '#':
enter_state(state::hash, is_arithmetic_type(arg_type));
specs.alt = true;
++begin;
break;
case '0':
enter_state(state::zero);
if (!is_arithmetic_type(arg_type))
throw_format_error("format specifier requires numeric argument");
if (specs.align == align::none) {
// Ignore 0 if align is specified for compatibility with std::format.
specs.align = align::numeric;
specs.fill[0] = Char('0');
}
++begin;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '{':
enter_state(state::width);
begin = parse_dynamic_spec(begin, end, specs.width, specs.width_ref, ctx);
break;
case '.':
enter_state(state::precision,
in(arg_type, float_set | string_set | cstring_set));
begin = parse_precision(begin, end, specs.precision, specs.precision_ref,
ctx);
break;
case 'L':
enter_state(state::locale, is_arithmetic_type(arg_type));
specs.localized = true;
++begin;
break;
case 'd':
return parse_presentation_type(pres::dec, integral_set);
case 'o':
return parse_presentation_type(pres::oct, integral_set);
case 'x':
return parse_presentation_type(pres::hex_lower, integral_set);
case 'X':
return parse_presentation_type(pres::hex_upper, integral_set);
case 'b':
return parse_presentation_type(pres::bin_lower, integral_set);
case 'B':
return parse_presentation_type(pres::bin_upper, integral_set);
case 'a':
return parse_presentation_type(pres::hexfloat_lower, float_set);
case 'A':
return parse_presentation_type(pres::hexfloat_upper, float_set);
case 'e':
return parse_presentation_type(pres::exp_lower, float_set);
case 'E':
return parse_presentation_type(pres::exp_upper, float_set);
case 'f':
return parse_presentation_type(pres::fixed_lower, float_set);
case 'F':
return parse_presentation_type(pres::fixed_upper, float_set);
case 'g':
return parse_presentation_type(pres::general_lower, float_set);
case 'G':
return parse_presentation_type(pres::general_upper, float_set);
case 'c':
return parse_presentation_type(pres::chr, integral_set);
case 's':
return parse_presentation_type(pres::string,
bool_set | string_set | cstring_set);
case 'p':
return parse_presentation_type(pres::pointer, pointer_set | cstring_set);
case '?':
return parse_presentation_type(pres::debug,
char_set | string_set | cstring_set);
case '}':
return begin;
default: {
if (*begin == '}') return begin;
// Parse fill and alignment.
auto fill_end = begin + code_point_length(begin);
if (end - fill_end <= 0) {
throw_format_error("invalid format specifier");
return begin;
}
if (*begin == '{') {
throw_format_error("invalid fill character '{'");
return begin;
}
auto align = parse_align(to_ascii(*fill_end));
enter_state(state::align, align != align::none);
specs.fill = {begin, to_unsigned(fill_end - begin)};
specs.align = align;
begin = fill_end + 1;
}
}
if (begin == end) return begin;
c = to_ascii(*begin);
}
return begin;
}
template <typename Char, typename Handler>
@@ -2575,14 +2462,11 @@ FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
Handler& handler;
int arg_id;
FMT_CONSTEXPR void operator()() { arg_id = handler.on_arg_id(); }
FMT_CONSTEXPR void operator()(int id) { arg_id = handler.on_arg_id(id); }
FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
FMT_CONSTEXPR void on_auto() { arg_id = handler.on_arg_id(); }
FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); }
FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
arg_id = handler.on_arg_id(id);
}
FMT_CONSTEXPR void on_error(const char* message) {
if (message) handler.on_error(message);
}
};
++begin;
@@ -2611,9 +2495,6 @@ FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
template <bool IS_CONSTEXPR, typename Char, typename Handler>
FMT_CONSTEXPR FMT_INLINE void parse_format_string(
basic_string_view<Char> format_str, Handler&& handler) {
// Workaround a name-lookup bug in MSVC's modules implementation.
using detail::find;
auto begin = format_str.data();
auto end = begin + format_str.size();
if (end - begin < 32) {
@@ -2635,21 +2516,21 @@ FMT_CONSTEXPR FMT_INLINE void parse_format_string(
return;
}
struct writer {
FMT_CONSTEXPR void operator()(const Char* pbegin, const Char* pend) {
if (pbegin == pend) return;
FMT_CONSTEXPR void operator()(const Char* from, const Char* to) {
if (from == to) return;
for (;;) {
const Char* p = nullptr;
if (!find<IS_CONSTEXPR>(pbegin, pend, Char('}'), p))
return handler_.on_text(pbegin, pend);
if (!find<IS_CONSTEXPR>(from, to, Char('}'), p))
return handler_.on_text(from, to);
++p;
if (p == pend || *p != '}')
if (p == to || *p != '}')
return handler_.on_error("unmatched '}' in format string");
handler_.on_text(pbegin, p);
pbegin = p + 1;
handler_.on_text(from, p);
from = p + 1;
}
}
Handler& handler_;
} write{handler};
} write = {handler};
while (begin != end) {
// Doing two passes with memchr (one for '{' and another for '}') is up to
// 2.5x faster than the naive one-pass implementation on big format strings.
@@ -2661,6 +2542,13 @@ FMT_CONSTEXPR FMT_INLINE void parse_format_string(
}
}
template <typename T, bool = is_named_arg<T>::value> struct strip_named_arg {
using type = T;
};
template <typename T> struct strip_named_arg<T, true> {
using type = remove_cvref_t<decltype(T::value)>;
};
template <typename T, typename ParseContext>
FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
-> decltype(ctx.begin()) {
@@ -2668,206 +2556,30 @@ FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
using context = buffer_context<char_type>;
using mapped_type = conditional_t<
mapped_type_constant<T, context>::value != type::custom_type,
decltype(arg_mapper<context>().map(std::declval<const T&>())), T>;
auto f = conditional_t<has_formatter<mapped_type, context>::value,
formatter<mapped_type, char_type>,
fallback_formatter<T, char_type>>();
return f.parse(ctx);
decltype(arg_mapper<context>().map(std::declval<const T&>())),
typename strip_named_arg<T>::type>;
return formatter<mapped_type, char_type>().parse(ctx);
}
// A parse context with extra argument id checks. It is only used at compile
// time because adding checks at runtime would introduce substantial overhead
// and would be redundant since argument ids are checked when arguments are
// retrieved anyway.
template <typename Char, typename ErrorHandler = error_handler>
class compile_parse_context
: public basic_format_parse_context<Char, ErrorHandler> {
private:
int num_args_;
using base = basic_format_parse_context<Char, ErrorHandler>;
public:
explicit FMT_CONSTEXPR compile_parse_context(
basic_string_view<Char> format_str,
int num_args = (std::numeric_limits<int>::max)(), ErrorHandler eh = {})
: base(format_str, eh), num_args_(num_args) {}
FMT_CONSTEXPR auto next_arg_id() -> int {
int id = base::next_arg_id();
if (id >= num_args_) this->on_error("argument not found");
return id;
}
FMT_CONSTEXPR void check_arg_id(int id) {
base::check_arg_id(id);
if (id >= num_args_) this->on_error("argument not found");
}
using base::check_arg_id;
};
template <typename ErrorHandler>
FMT_CONSTEXPR void check_int_type_spec(presentation_type type,
ErrorHandler&& eh) {
if (type > presentation_type::bin_upper && type != presentation_type::chr)
eh.on_error("invalid type specifier");
}
// Checks char specs and returns true if the type spec is char (and not int).
template <typename Char, typename ErrorHandler = error_handler>
FMT_CONSTEXPR auto check_char_specs(const basic_format_specs<Char>& specs,
ErrorHandler&& eh = {}) -> bool {
// Checks char specs and returns true iff the presentation type is char-like.
template <typename Char>
FMT_CONSTEXPR auto check_char_specs(const format_specs<Char>& specs) -> bool {
if (specs.type != presentation_type::none &&
specs.type != presentation_type::chr) {
check_int_type_spec(specs.type, eh);
specs.type != presentation_type::chr &&
specs.type != presentation_type::debug) {
return false;
}
if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
eh.on_error("invalid format specifier for char");
throw_format_error("invalid format specifier for char");
return true;
}
// 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
};
constexpr FMT_INLINE_VARIABLE int invalid_arg_index = -1;
struct float_specs {
int precision;
float_format format : 8;
sign_t sign : 8;
bool upper : 1;
bool locale : 1;
bool binary32 : 1;
bool fallback : 1;
bool showpoint : 1;
};
template <typename ErrorHandler = error_handler, typename Char>
FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
ErrorHandler&& eh = {})
-> float_specs {
auto result = float_specs();
result.showpoint = specs.alt;
result.locale = specs.localized;
switch (specs.type) {
case presentation_type::none:
result.format = float_format::general;
break;
case presentation_type::general_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::general_lower:
result.format = float_format::general;
break;
case presentation_type::exp_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::exp_lower:
result.format = float_format::exp;
result.showpoint |= specs.precision != 0;
break;
case presentation_type::fixed_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::fixed_lower:
result.format = float_format::fixed;
result.showpoint |= specs.precision != 0;
break;
case presentation_type::hexfloat_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::hexfloat_lower:
result.format = float_format::hex;
break;
default:
eh.on_error("invalid type specifier");
break;
}
return result;
}
template <typename ErrorHandler = error_handler>
FMT_CONSTEXPR auto check_cstring_type_spec(presentation_type type,
ErrorHandler&& eh = {}) -> bool {
if (type == presentation_type::none || type == presentation_type::string)
return true;
if (type != presentation_type::pointer) eh.on_error("invalid type specifier");
return false;
}
template <typename ErrorHandler = error_handler>
FMT_CONSTEXPR void check_string_type_spec(presentation_type type,
ErrorHandler&& eh = {}) {
if (type != presentation_type::none && type != presentation_type::string)
eh.on_error("invalid type specifier");
}
template <typename ErrorHandler>
FMT_CONSTEXPR void check_pointer_type_spec(presentation_type type,
ErrorHandler&& eh) {
if (type != presentation_type::none && type != presentation_type::pointer)
eh.on_error("invalid type specifier");
}
// A parse_format_specs handler that checks if specifiers are consistent with
// the argument type.
template <typename Handler> class specs_checker : public Handler {
private:
detail::type arg_type_;
FMT_CONSTEXPR void require_numeric_argument() {
if (!is_arithmetic_type(arg_type_))
this->on_error("format specifier requires numeric argument");
}
public:
FMT_CONSTEXPR specs_checker(const Handler& handler, detail::type arg_type)
: Handler(handler), arg_type_(arg_type) {}
FMT_CONSTEXPR void on_align(align_t align) {
if (align == align::numeric) require_numeric_argument();
Handler::on_align(align);
}
FMT_CONSTEXPR void on_sign(sign_t s) {
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) {
this->on_error("format specifier requires signed argument");
}
Handler::on_sign(s);
}
FMT_CONSTEXPR void on_hash() {
require_numeric_argument();
Handler::on_hash();
}
FMT_CONSTEXPR void on_localized() {
require_numeric_argument();
Handler::on_localized();
}
FMT_CONSTEXPR void on_zero() {
require_numeric_argument();
Handler::on_zero();
}
FMT_CONSTEXPR void end_precision() {
if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type)
this->on_error("precision not allowed for this argument type");
}
};
constexpr int invalid_arg_index = -1;
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
#if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <int N, typename T, typename... Args, typename Char>
constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
if constexpr (detail::is_statically_named_arg<T>()) {
if constexpr (is_statically_named_arg<T>()) {
if (name == T::name) return N;
}
if constexpr (sizeof...(Args) > 0)
@@ -2879,7 +2591,7 @@ constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
template <typename... Args, typename Char>
FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
#if FMT_USE_NONTYPE_TEMPLATE_ARGS
if constexpr (sizeof...(Args) > 0)
return get_arg_index_by_name<0, Args...>(name);
#endif
@@ -2887,23 +2599,26 @@ FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
return invalid_arg_index;
}
template <typename Char, typename ErrorHandler, typename... Args>
class format_string_checker {
template <typename Char, typename... Args> class format_string_checker {
private:
using parse_context_type = compile_parse_context<Char, ErrorHandler>;
enum { num_args = sizeof...(Args) };
using parse_context_type = compile_parse_context<Char>;
static constexpr int num_args = sizeof...(Args);
// Format specifier parsing function.
// In the future basic_format_parse_context will replace compile_parse_context
// here and will use is_constant_evaluated and downcasting to access the data
// needed for compile-time checks: https://godbolt.org/z/GvWzcTjh1.
using parse_func = const Char* (*)(parse_context_type&);
parse_context_type context_;
parse_func parse_funcs_[num_args > 0 ? num_args : 1];
parse_func parse_funcs_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
type types_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
public:
explicit FMT_CONSTEXPR format_string_checker(
basic_string_view<Char> format_str, ErrorHandler eh)
: context_(format_str, num_args, eh),
parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
explicit FMT_CONSTEXPR format_string_checker(basic_string_view<Char> fmt)
: context_(fmt, num_args, types_),
parse_funcs_{&parse_format_specs<Args, parse_context_type>...},
types_{mapped_type_constant<Args, buffer_context<Char>>::value...} {}
FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
@@ -2912,10 +2627,10 @@ class format_string_checker {
return context_.check_arg_id(id), id;
}
FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
#if FMT_USE_NONTYPE_TEMPLATE_ARGS
auto index = get_arg_index_by_name<Args...>(id);
if (index == invalid_arg_index) on_error("named argument is not found");
return context_.check_arg_id(index), index;
return index;
#else
(void)id;
on_error("compile-time checks for named arguments require C++20 support");
@@ -2927,41 +2642,55 @@ class format_string_checker {
FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
-> const Char* {
context_.advance_to(context_.begin() + (begin - &*context_.begin()));
context_.advance_to(begin);
// id >= 0 check is a workaround for gcc 10 bug (#2065).
return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
}
FMT_CONSTEXPR void on_error(const char* message) {
context_.on_error(message);
throw_format_error(message);
}
};
// Reports a compile-time error if S is not a valid format string.
template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
FMT_INLINE void check_format_string(const S&) {
#ifdef FMT_ENFORCE_COMPILE_STRING
static_assert(is_compile_string<S>::value,
"FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
"FMT_STRING.");
#endif
}
template <typename... Args, typename S,
enable_if_t<(is_compile_string<S>::value), int>>
FMT_ENABLE_IF(is_compile_string<S>::value)>
void check_format_string(S format_str) {
FMT_CONSTEXPR auto s = to_string_view(format_str);
using checker = format_string_checker<typename S::char_type, error_handler,
remove_cvref_t<Args>...>;
FMT_CONSTEXPR bool invalid_format =
(parse_format_string<true>(s, checker(s, {})), true);
ignore_unused(invalid_format);
using char_t = typename S::char_type;
FMT_CONSTEXPR auto s = basic_string_view<char_t>(format_str);
using checker = format_string_checker<char_t, remove_cvref_t<Args>...>;
FMT_CONSTEXPR bool error = (parse_format_string<true>(s, checker(s)), true);
ignore_unused(error);
}
template <typename Char = char> struct vformat_args {
using type = basic_format_args<
basic_format_context<std::back_insert_iterator<buffer<Char>>, Char>>;
};
template <> struct vformat_args<char> { using type = format_args; };
// Use vformat_args and avoid type_identity to keep symbols short.
template <typename Char>
void vformat_to(
buffer<Char>& buf, basic_string_view<Char> fmt,
basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
locale_ref loc = {});
void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
typename vformat_args<Char>::type args, locale_ref loc = {});
FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
#ifndef _WIN32
inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
#endif
FMT_END_DETAIL_NAMESPACE
} // namespace detail
// A formatter specialization for the core types corresponding to detail::type
// constants.
FMT_BEGIN_EXPORT
// A formatter specialization for natively supported types.
template <typename T, typename Char>
struct formatter<T, Char,
enable_if_t<detail::type_constant<T, Char>::value !=
@@ -2970,72 +2699,21 @@ struct formatter<T, Char,
detail::dynamic_format_specs<Char> specs_;
public:
// Parses format specifiers stopping either at the end of the range or at the
// terminating '}'.
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
auto begin = ctx.begin(), end = ctx.end();
if (begin == end) return begin;
using handler_type = detail::dynamic_specs_handler<ParseContext>;
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
auto type = detail::type_constant<T, Char>::value;
auto checker =
detail::specs_checker<handler_type>(handler_type(specs_, ctx), type);
auto it = detail::parse_format_specs(begin, end, checker);
auto eh = ctx.error_handler();
switch (type) {
case detail::type::none_type:
FMT_ASSERT(false, "invalid argument type");
break;
case detail::type::bool_type:
if (specs_.type == presentation_type::none ||
specs_.type == presentation_type::string) {
break;
}
FMT_FALLTHROUGH;
case detail::type::int_type:
case detail::type::uint_type:
case detail::type::long_long_type:
case detail::type::ulong_long_type:
case detail::type::int128_type:
case detail::type::uint128_type:
detail::check_int_type_spec(specs_.type, eh);
break;
case detail::type::char_type:
detail::check_char_specs(specs_, eh);
break;
case detail::type::float_type:
if (detail::const_check(FMT_USE_FLOAT))
detail::parse_float_type_spec(specs_, eh);
else
FMT_ASSERT(false, "float support disabled");
break;
case detail::type::double_type:
if (detail::const_check(FMT_USE_DOUBLE))
detail::parse_float_type_spec(specs_, eh);
else
FMT_ASSERT(false, "double support disabled");
break;
case detail::type::long_double_type:
if (detail::const_check(FMT_USE_LONG_DOUBLE))
detail::parse_float_type_spec(specs_, eh);
else
FMT_ASSERT(false, "long double support disabled");
break;
case detail::type::cstring_type:
detail::check_cstring_type_spec(specs_.type, eh);
break;
case detail::type::string_type:
detail::check_string_type_spec(specs_.type, eh);
break;
case detail::type::pointer_type:
detail::check_pointer_type_spec(specs_.type, eh);
break;
case detail::type::custom_type:
// Custom format specifiers are checked in parse functions of
// formatter specializations.
break;
}
return it;
auto end =
detail::parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, type);
if (type == detail::type::char_type) detail::check_char_specs(specs_);
return end;
}
template <detail::type U = detail::type_constant<T, Char>::value,
FMT_ENABLE_IF(U == detail::type::string_type ||
U == detail::type::cstring_type ||
U == detail::type::char_type)>
FMT_CONSTEXPR void set_debug_format(bool set = true) {
specs_.type = set ? presentation_type::debug : presentation_type::none;
}
template <typename FormatContext>
@@ -3043,7 +2721,30 @@ struct formatter<T, Char,
-> decltype(ctx.out());
};
template <typename Char> struct basic_runtime { basic_string_view<Char> str; };
#define FMT_FORMAT_AS(Type, Base) \
template <typename Char> \
struct formatter<Type, Char> : formatter<Base, Char> { \
template <typename FormatContext> \
auto format(const Type& val, FormatContext& ctx) const \
-> decltype(ctx.out()) { \
return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
} \
}
FMT_FORMAT_AS(signed char, int);
FMT_FORMAT_AS(unsigned char, unsigned);
FMT_FORMAT_AS(short, int);
FMT_FORMAT_AS(unsigned short, unsigned);
FMT_FORMAT_AS(long, long long);
FMT_FORMAT_AS(unsigned long, unsigned long long);
FMT_FORMAT_AS(Char*, const Char*);
FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
FMT_FORMAT_AS(std::nullptr_t, const void*);
FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
template <typename Char = char> struct runtime_format_string {
basic_string_view<Char> str;
};
/** A compile-time format string. */
template <typename Char, typename... Args> class basic_format_string {
@@ -3063,25 +2764,24 @@ template <typename Char, typename... Args> class basic_format_string {
#ifdef FMT_HAS_CONSTEVAL
if constexpr (detail::count_named_args<Args...>() ==
detail::count_statically_named_args<Args...>()) {
using checker = detail::format_string_checker<Char, detail::error_handler,
remove_cvref_t<Args>...>;
detail::parse_format_string<true>(str_, checker(s, {}));
using checker =
detail::format_string_checker<Char, remove_cvref_t<Args>...>;
detail::parse_format_string<true>(str_, checker(s));
}
#else
detail::check_format_string<Args...>(s);
#endif
}
basic_format_string(basic_runtime<Char> r) : str_(r.str) {}
basic_format_string(runtime_format_string<Char> fmt) : str_(fmt.str) {}
FMT_INLINE operator basic_string_view<Char>() const { return str_; }
FMT_INLINE auto get() const -> basic_string_view<Char> { return str_; }
};
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
// Workaround broken conversion on older gcc.
template <typename... Args> using format_string = string_view;
template <typename S> auto runtime(const S& s) -> basic_string_view<char_t<S>> {
return s;
}
template <typename...> using format_string = string_view;
inline auto runtime(string_view s) -> string_view { return s; }
#else
template <typename... Args>
using format_string = basic_format_string<char, type_identity_t<Args>...>;
@@ -3095,9 +2795,7 @@ using format_string = basic_format_string<char, type_identity_t<Args>...>;
fmt::print(fmt::runtime("{:d}"), "I am not a number");
\endrst
*/
template <typename S> auto runtime(const S& s) -> basic_runtime<char_t<S>> {
return {{s}};
}
inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; }
#endif
FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
@@ -3123,10 +2821,9 @@ FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
template <typename OutputIt,
FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
using detail::get_buffer;
auto&& buf = get_buffer<char>(out);
auto&& buf = detail::get_buffer<char>(out);
detail::vformat_to(buf, fmt, args, {});
return detail::get_iterator(buf);
return detail::get_iterator(buf, out);
}
/**
@@ -3185,7 +2882,7 @@ template <typename... T>
FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
T&&... args) -> size_t {
auto buf = detail::counting_buffer<>();
detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...), {});
detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...), {});
return buf.count();
}
@@ -3226,7 +2923,25 @@ FMT_INLINE void print(std::FILE* f, format_string<T...> fmt, T&&... args) {
: detail::vprint_mojibake(f, fmt, vargs);
}
FMT_MODULE_EXPORT_END
/**
Formats ``args`` according to specifications in ``fmt`` and writes the
output to the file ``f`` followed by a newline.
*/
template <typename... T>
FMT_INLINE void println(std::FILE* f, format_string<T...> fmt, T&&... args) {
return fmt::print(f, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
}
/**
Formats ``args`` according to specifications in ``fmt`` and writes the output
to ``stdout`` followed by a newline.
*/
template <typename... T>
FMT_INLINE void println(format_string<T...> fmt, T&&... args) {
return fmt::println(stdout, fmt, std::forward<T>(args)...);
}
FMT_END_EXPORT
FMT_GCC_PRAGMA("GCC pop_options")
FMT_END_NAMESPACE

2630
extern/fmtlib/include/fmt/format-inl.h vendored
View File

@@ -9,13 +9,9 @@
#define FMT_FORMAT_INL_H_
#include <algorithm>
#include <cctype>
#include <cerrno> // errno
#include <climits>
#include <cmath>
#include <cstdarg>
#include <cstring> // std::memmove
#include <cwchar>
#include <exception>
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
@@ -44,21 +40,8 @@ FMT_FUNC void throw_format_error(const char* message) {
FMT_THROW(format_error(message));
}
#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
FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
string_view message) FMT_NOEXCEPT {
string_view message) noexcept {
// Report error code making sure that the output fits into
// inline_buffer_size to avoid dynamic memory allocation and potential
// bad_alloc.
@@ -81,7 +64,7 @@ FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
}
FMT_FUNC void report_error(format_func func, int error_code,
const char* message) FMT_NOEXCEPT {
const char* message) noexcept {
memory_buffer full_message;
func(full_message, error_code, message);
// Don't use fwrite_fully because the latter may throw.
@@ -93,7 +76,8 @@ FMT_FUNC void report_error(format_func func, int error_code,
inline 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"));
if (written < count)
FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
}
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
@@ -127,928 +111,151 @@ template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
return '.';
}
#endif
FMT_FUNC auto write_loc(appender out, loc_value value,
const format_specs<>& specs, locale_ref loc) -> bool {
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
auto locale = loc.get<std::locale>();
// We cannot use the num_put<char> facet because it may produce output in
// a wrong encoding.
using facet = format_facet<std::locale>;
if (std::has_facet<facet>(locale))
return std::use_facet<facet>(locale).put(out, value, specs);
return facet(locale).put(out, value, specs);
#endif
return false;
}
} // namespace detail
#if !FMT_MSC_VER
FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT = default;
template <typename Locale> typename Locale::id format_facet<Locale>::id;
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
template <typename Locale> format_facet<Locale>::format_facet(Locale& loc) {
auto& numpunct = std::use_facet<std::numpunct<char>>(loc);
grouping_ = numpunct.grouping();
if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep());
}
template <>
FMT_API FMT_FUNC auto format_facet<std::locale>::do_put(
appender out, loc_value val, const format_specs<>& specs) const -> bool {
return val.visit(
detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_});
}
#endif
FMT_FUNC std::system_error vsystem_error(int error_code, string_view format_str,
FMT_FUNC std::system_error vsystem_error(int error_code, string_view fmt,
format_args args) {
auto ec = std::error_code(error_code, std::generic_category());
return std::system_error(ec, vformat(format_str, args));
return std::system_error(ec, vformat(fmt, args));
}
namespace detail {
template <> FMT_FUNC int count_digits<4>(detail::fallback_uintptr n) {
// fallback_uintptr is always stored in little endian.
int i = static_cast<int>(sizeof(void*)) - 1;
while (i > 0 && n.value[i] == 0) --i;
auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
return i >= 0 ? i * char_digits + count_digits<4, unsigned>(n.value[i]) : 1;
template <typename F> inline bool operator==(basic_fp<F> x, basic_fp<F> y) {
return x.f == y.f && x.e == y.e;
}
// log10(2) = 0x0.4d104d427de7fbcc...
static constexpr uint64_t log10_2_significand = 0x4d104d427de7fbcc;
template <typename T = void> struct basic_impl_data {
// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
// These are generated by support/compute-powers.py.
static constexpr uint64_t pow10_significands[87] = {
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,
};
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnarrowing"
#endif
// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
// to significands above.
static constexpr int16_t pow10_exponents[87] = {
-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};
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
# pragma GCC diagnostic pop
#endif
static constexpr uint64_t power_of_10_64[20] = {
1, FMT_POWERS_OF_10(1ULL), FMT_POWERS_OF_10(1000000000ULL),
10000000000000000000ULL};
};
// This is a struct rather than an alias to avoid shadowing warnings in gcc.
struct impl_data : basic_impl_data<> {};
#if __cplusplus < 201703L
template <typename T>
constexpr uint64_t basic_impl_data<T>::pow10_significands[];
template <typename T> constexpr int16_t basic_impl_data<T>::pow10_exponents[];
template <typename T> constexpr uint64_t basic_impl_data<T>::power_of_10_64[];
#endif
template <typename T> struct bits {
static FMT_CONSTEXPR_DECL const int value =
static_cast<int>(sizeof(T) * std::numeric_limits<unsigned char>::digits);
};
// Returns the number of significand bits in Float excluding the implicit bit.
template <typename Float> constexpr int num_significand_bits() {
// Subtract 1 to account for an implicit most significant bit in the
// normalized form.
return std::numeric_limits<Float>::digits - 1;
// Compilers should be able to optimize this into the ror instruction.
FMT_CONSTEXPR inline uint32_t rotr(uint32_t n, uint32_t r) noexcept {
r &= 31;
return (n >> r) | (n << (32 - r));
}
// A floating-point number f * pow(2, e).
struct fp {
uint64_t f;
int e;
static constexpr const int num_significand_bits = bits<decltype(f)>::value;
constexpr fp() : f(0), e(0) {}
constexpr fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
// Constructs fp from an IEEE754 floating-point number. It is a template to
// prevent compile errors on systems where n is not IEEE754.
template <typename Float> explicit FMT_CONSTEXPR fp(Float n) { assign(n); }
template <typename Float>
using is_supported = bool_constant<sizeof(Float) == sizeof(uint64_t) ||
sizeof(Float) == sizeof(uint32_t)>;
// Assigns d to this and return true iff predecessor is closer than successor.
template <typename Float, FMT_ENABLE_IF(is_supported<Float>::value)>
FMT_CONSTEXPR bool assign(Float n) {
// Assume float is in the format [sign][exponent][significand].
const int num_float_significand_bits =
detail::num_significand_bits<Float>();
const uint64_t implicit_bit = 1ULL << num_float_significand_bits;
const uint64_t significand_mask = implicit_bit - 1;
constexpr bool is_double = sizeof(Float) == sizeof(uint64_t);
auto u = bit_cast<conditional_t<is_double, uint64_t, uint32_t>>(n);
f = u & significand_mask;
const uint64_t exponent_mask = (~0ULL >> 1) & ~significand_mask;
int biased_e =
static_cast<int>((u & exponent_mask) >> num_float_significand_bits);
// The predecessor is closer if n 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).
const int exponent_bias = std::numeric_limits<Float>::max_exponent - 1;
e = biased_e - exponent_bias - num_float_significand_bits;
return is_predecessor_closer;
}
template <typename Float, FMT_ENABLE_IF(!is_supported<Float>::value)>
bool assign(Float) {
FMT_ASSERT(false, "");
return false;
}
};
// Normalizes the value converted from double and multiplied by (1 << SHIFT).
template <int SHIFT = 0> FMT_CONSTEXPR fp normalize(fp value) {
// Handle subnormals.
const uint64_t implicit_bit = 1ULL << num_significand_bits<double>();
const auto shifted_implicit_bit = 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::num_significand_bits - num_significand_bits<double>() - SHIFT - 1;
value.f <<= offset;
value.e -= offset;
return value;
FMT_CONSTEXPR inline uint64_t rotr(uint64_t n, uint32_t r) noexcept {
r &= 63;
return (n >> r) | (n << (64 - r));
}
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.
FMT_CONSTEXPR 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<uint64_t>(product >> 64);
return (static_cast<uint64_t>(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
}
FMT_CONSTEXPR 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`.
FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
int& pow10_exponent) {
const int shift = 32;
const auto significand = static_cast<int64_t>(log10_2_significand);
int index = static_cast<int>(
((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
((int64_t(1) << shift) - 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 {impl_data::pow10_significands[index],
impl_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;
constexpr accumulator() : lower(0), upper(0) {}
constexpr explicit operator uint32_t() const {
return static_cast<uint32_t>(lower);
}
FMT_CONSTEXPR void operator+=(uint64_t n) {
lower += n;
if (lower < n) ++upper;
}
FMT_CONSTEXPR void operator>>=(int shift) {
FMT_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<bigit, bigits_capacity> bigits_;
int exp_;
FMT_CONSTEXPR20 bigit operator[](int index) const {
return bigits_[to_unsigned(index)];
}
FMT_CONSTEXPR20 bigit& operator[](int index) {
return bigits_[to_unsigned(index)];
}
static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
friend struct formatter<bigint>;
FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
(*this)[index] = static_cast<bigit>(result);
borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
}
FMT_CONSTEXPR20 void remove_leading_zeros() {
int num_bigits = static_cast<int>(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.
FMT_CONSTEXPR20 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();
}
FMT_CONSTEXPR20 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<bigit>(result);
carry = static_cast<bigit>(result >> bigit_bits);
}
if (carry != 0) bigits_.push_back(carry);
}
FMT_CONSTEXPR20 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<bigit>(result);
}
while (carry != 0) {
bigits_.push_back(carry & mask);
carry >>= bigit_bits;
}
}
public:
FMT_CONSTEXPR20 bigint() : exp_(0) {}
explicit bigint(uint64_t n) { assign(n); }
FMT_CONSTEXPR20 ~bigint() {
FMT_ASSERT(bigits_.capacity() <= bigits_capacity, "");
}
bigint(const bigint&) = delete;
void operator=(const bigint&) = delete;
FMT_CONSTEXPR20 void assign(const bigint& other) {
auto size = other.bigits_.size();
bigits_.resize(size);
auto data = other.bigits_.data();
std::copy(data, data + size, make_checked(bigits_.data(), size));
exp_ = other.exp_;
}
FMT_CONSTEXPR20 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;
}
FMT_CONSTEXPR20 int num_bigits() const {
return static_cast<int>(bigits_.size()) + exp_;
}
FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
FMT_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 <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
FMT_ASSERT(value > 0, "");
multiply(uint32_or_64_or_128_t<Int>(value));
return *this;
}
friend FMT_CONSTEXPR20 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<int>(lhs.bigits_.size()) - 1;
int j = static_cast<int>(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 FMT_CONSTEXPR20 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<double_bigit>(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.
FMT_CONSTEXPR20 void assign_pow10(int exp) {
FMT_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.
}
FMT_CONSTEXPR20 void square() {
int num_bigits = static_cast<int>(bigits_.size());
int num_result_bigits = 2 * num_bigits;
basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
bigits_.resize(to_unsigned(num_result_bigits));
using accumulator_t = conditional_t<FMT_USE_INT128, uint128_t, accumulator>;
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<double_bigit>(n[i]) * n[j];
}
(*this)[bigit_index] = static_cast<bigit>(sum);
sum >>= bits<bigit>::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<double_bigit>(n[i++]) * n[j--];
(*this)[bigit_index] = static_cast<bigit>(sum);
sum >>= bits<bigit>::value;
}
remove_leading_zeros();
exp_ *= 2;
}
// If this bigint has a bigger exponent than other, adds trailing zero to make
// exponents equal. This simplifies some operations such as subtraction.
FMT_CONSTEXPR20 void align(const bigint& other) {
int exp_difference = exp_ - other.exp_;
if (exp_difference <= 0) return;
int num_bigits = static_cast<int>(bigits_.size());
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;
}
// Divides this bignum by divisor, assigning the remainder to this and
// returning the quotient.
FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
FMT_ASSERT(this != &divisor, "");
if (compare(*this, divisor) < 0) return 0;
FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
align(divisor);
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.
FMT_CONSTEXPR 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.
};
}
struct gen_digits_handler {
char* buf;
int size;
int precision;
int exp10;
bool fixed;
FMT_CONSTEXPR digits::result on_digit(char digit, uint64_t divisor,
uint64_t remainder, uint64_t error,
bool integral) {
FMT_ASSERT(remainder < divisor, "");
buf[size++] = digit;
if (!integral && error >= remainder) return digits::error;
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';
if (fixed)
buf[size++] = '0';
else
++exp10;
}
return digits::done;
}
};
// 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).
FMT_INLINE FMT_CONSTEXPR20 digits::result grisu_gen_digits(
fp value, uint64_t error, int& exp, gen_digits_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<uint32_t>(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 = count_digits(integral); // kappa in Grisu.
// Non-fixed formats require at least one digit and no precision adjustment.
if (handler.fixed) {
// Adjust fixed precision by exponent because it is relative to decimal
// point.
int precision_offset = exp + handler.exp10;
if (precision_offset > 0 &&
handler.precision > max_value<int>() - precision_offset) {
FMT_THROW(format_error("number is too big"));
}
handler.precision += precision_offset;
// Check if precision is satisfied just by leading zeros, e.g.
// format("{:.2f}", 0.001) gives "0.00" without generating any digits.
if (handler.precision <= 0) {
if (handler.precision < 0) return digits::done;
// Divide by 10 to prevent overflow.
uint64_t divisor = impl_data::power_of_10_64[exp - 1] << -one.e;
auto dir = get_round_direction(divisor, value.f / 10, error * 10);
if (dir == round_direction::unknown) return digits::error;
handler.buf[handler.size++] = dir == round_direction::up ? '1' : '0';
return digits::done;
}
}
// 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;
auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
auto result = handler.on_digit(static_cast<char>('0' + digit),
impl_data::power_of_10_64[exp] << -one.e,
remainder, error, 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<char>('0' + (fractional >> -one.e));
fractional &= one.f - 1;
--exp;
auto result = handler.on_digit(digit, one.f, fractional, error, false);
if (result != digits::more) return result;
}
}
// A 128-bit integer type used internally,
struct uint128_wrapper {
uint128_wrapper() = default;
#if FMT_USE_INT128
uint128_t internal_;
constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
: internal_{static_cast<uint128_t>(low) |
(static_cast<uint128_t>(high) << 64)} {}
constexpr uint128_wrapper(uint128_t u) : internal_{u} {}
constexpr uint64_t high() const FMT_NOEXCEPT {
return uint64_t(internal_ >> 64);
}
constexpr uint64_t low() const FMT_NOEXCEPT { return uint64_t(internal_); }
uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
internal_ += n;
return *this;
}
#else
uint64_t high_;
uint64_t low_;
constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
: high_{high},
low_{low} {}
constexpr uint64_t high() const FMT_NOEXCEPT { return high_; }
constexpr uint64_t low() const FMT_NOEXCEPT { return low_; }
uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
# if defined(_MSC_VER) && defined(_M_X64)
unsigned char carry = _addcarry_u64(0, low_, n, &low_);
_addcarry_u64(carry, high_, 0, &high_);
return *this;
# else
uint64_t sum = low_ + n;
high_ += (sum < low_ ? 1 : 0);
low_ = sum;
return *this;
# endif
}
#endif
};
// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
namespace dragonbox {
// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
inline uint128_wrapper umul128(uint64_t x, uint64_t y) FMT_NOEXCEPT {
#if FMT_USE_INT128
return static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
#elif defined(_MSC_VER) && defined(_M_X64)
uint128_wrapper result;
result.low_ = _umul128(x, y, &result.high_);
return result;
#else
const uint64_t mask = (uint64_t(1) << 32) - uint64_t(1);
uint64_t a = x >> 32;
uint64_t b = x & mask;
uint64_t c = y >> 32;
uint64_t d = y & mask;
uint64_t ac = a * c;
uint64_t bc = b * c;
uint64_t ad = a * d;
uint64_t bd = b * d;
uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
(intermediate << 32) + (bd & mask)};
#endif
}
// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
inline uint64_t umul128_upper64(uint64_t x, uint64_t y) FMT_NOEXCEPT {
#if FMT_USE_INT128
auto p = static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
return static_cast<uint64_t>(p >> 64);
#elif defined(_MSC_VER) && defined(_M_X64)
return __umulh(x, y);
#else
return umul128(x, y).high();
#endif
}
// Computes upper 64 bits of multiplication of a 64-bit unsigned integer and a
// 128-bit unsigned integer.
inline uint64_t umul192_upper64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
uint128_wrapper g0 = umul128(x, y.high());
g0 += umul128_upper64(x, y.low());
return g0.high();
}
// Computes upper 32 bits of multiplication of a 32-bit unsigned integer and a
// Computes upper 64 bits of multiplication of a 32-bit unsigned integer and a
// 64-bit unsigned integer.
inline uint32_t umul96_upper32(uint32_t x, uint64_t y) FMT_NOEXCEPT {
return static_cast<uint32_t>(umul128_upper64(x, y));
inline uint64_t umul96_upper64(uint32_t x, uint64_t y) noexcept {
return umul128_upper64(static_cast<uint64_t>(x) << 32, y);
}
// Computes middle 64 bits of multiplication of a 64-bit unsigned integer and a
// Computes lower 128 bits of multiplication of a 64-bit unsigned integer and a
// 128-bit unsigned integer.
inline uint64_t umul192_middle64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
uint64_t g01 = x * y.high();
uint64_t g10 = umul128_upper64(x, y.low());
return g01 + g10;
inline uint128_fallback umul192_lower128(uint64_t x,
uint128_fallback y) noexcept {
uint64_t high = x * y.high();
uint128_fallback high_low = umul128(x, y.low());
return {high + high_low.high(), high_low.low()};
}
// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a
// 64-bit unsigned integer.
inline uint64_t umul96_lower64(uint32_t x, uint64_t y) FMT_NOEXCEPT {
inline uint64_t umul96_lower64(uint32_t x, uint64_t y) noexcept {
return x * y;
}
// Computes floor(log10(pow(2, e))) for e in [-1700, 1700] using the method from
// https://fmt.dev/papers/Grisu-Exact.pdf#page=5, section 3.4.
inline int floor_log10_pow2(int e) FMT_NOEXCEPT {
FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
const int shift = 22;
return (e * static_cast<int>(log10_2_significand >> (64 - shift))) >> shift;
}
// Various fast log computations.
inline int floor_log2_pow10(int e) FMT_NOEXCEPT {
FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
const uint64_t log2_10_integer_part = 3;
const uint64_t log2_10_fractional_digits = 0x5269e12f346e2bf9;
const int shift_amount = 19;
return (e * static_cast<int>(
(log2_10_integer_part << shift_amount) |
(log2_10_fractional_digits >> (64 - shift_amount)))) >>
shift_amount;
}
inline int floor_log10_pow2_minus_log10_4_over_3(int e) FMT_NOEXCEPT {
FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
const uint64_t log10_4_over_3_fractional_digits = 0x1ffbfc2bbc780375;
const int shift_amount = 22;
return (e * static_cast<int>(log10_2_significand >> (64 - shift_amount)) -
static_cast<int>(log10_4_over_3_fractional_digits >>
(64 - shift_amount))) >>
shift_amount;
inline int floor_log10_pow2_minus_log10_4_over_3(int e) noexcept {
FMT_ASSERT(e <= 2936 && e >= -2985, "too large exponent");
return (e * 631305 - 261663) >> 21;
}
// Returns true iff x is divisible by pow(2, exp).
inline bool divisible_by_power_of_2(uint32_t x, int exp) FMT_NOEXCEPT {
FMT_ASSERT(exp >= 1, "");
FMT_ASSERT(x != 0, "");
#ifdef FMT_BUILTIN_CTZ
return FMT_BUILTIN_CTZ(x) >= exp;
#else
return exp < num_bits<uint32_t>() && x == ((x >> exp) << exp);
#endif
}
inline bool divisible_by_power_of_2(uint64_t x, int exp) FMT_NOEXCEPT {
FMT_ASSERT(exp >= 1, "");
FMT_ASSERT(x != 0, "");
#ifdef FMT_BUILTIN_CTZLL
return FMT_BUILTIN_CTZLL(x) >= exp;
#else
return exp < num_bits<uint64_t>() && x == ((x >> exp) << exp);
#endif
}
FMT_INLINE_VARIABLE constexpr struct {
uint32_t divisor;
int shift_amount;
} div_small_pow10_infos[] = {{10, 16}, {100, 16}};
// Table entry type for divisibility test.
template <typename T> struct divtest_table_entry {
T mod_inv;
T max_quotient;
};
// Returns true iff x is divisible by pow(5, exp).
inline bool divisible_by_power_of_5(uint32_t x, int exp) FMT_NOEXCEPT {
FMT_ASSERT(exp <= 10, "too large exponent");
static constexpr const divtest_table_entry<uint32_t> divtest_table[] = {
{0x00000001, 0xffffffff}, {0xcccccccd, 0x33333333},
{0xc28f5c29, 0x0a3d70a3}, {0x26e978d5, 0x020c49ba},
{0x3afb7e91, 0x0068db8b}, {0x0bcbe61d, 0x0014f8b5},
{0x68c26139, 0x000431bd}, {0xae8d46a5, 0x0000d6bf},
{0x22e90e21, 0x00002af3}, {0x3a2e9c6d, 0x00000897},
{0x3ed61f49, 0x000001b7}};
return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
}
inline bool divisible_by_power_of_5(uint64_t x, int exp) FMT_NOEXCEPT {
FMT_ASSERT(exp <= 23, "too large exponent");
static constexpr const divtest_table_entry<uint64_t> divtest_table[] = {
{0x0000000000000001, 0xffffffffffffffff},
{0xcccccccccccccccd, 0x3333333333333333},
{0x8f5c28f5c28f5c29, 0x0a3d70a3d70a3d70},
{0x1cac083126e978d5, 0x020c49ba5e353f7c},
{0xd288ce703afb7e91, 0x0068db8bac710cb2},
{0x5d4e8fb00bcbe61d, 0x0014f8b588e368f0},
{0x790fb65668c26139, 0x000431bde82d7b63},
{0xe5032477ae8d46a5, 0x0000d6bf94d5e57a},
{0xc767074b22e90e21, 0x00002af31dc46118},
{0x8e47ce423a2e9c6d, 0x0000089705f4136b},
{0x4fa7f60d3ed61f49, 0x000001b7cdfd9d7b},
{0x0fee64690c913975, 0x00000057f5ff85e5},
{0x3662e0e1cf503eb1, 0x000000119799812d},
{0xa47a2cf9f6433fbd, 0x0000000384b84d09},
{0x54186f653140a659, 0x00000000b424dc35},
{0x7738164770402145, 0x0000000024075f3d},
{0xe4a4d1417cd9a041, 0x000000000734aca5},
{0xc75429d9e5c5200d, 0x000000000170ef54},
{0xc1773b91fac10669, 0x000000000049c977},
{0x26b172506559ce15, 0x00000000000ec1e4},
{0xd489e3a9addec2d1, 0x000000000002f394},
{0x90e860bb892c8d5d, 0x000000000000971d},
{0x502e79bf1b6f4f79, 0x0000000000001e39},
{0xdcd618596be30fe5, 0x000000000000060b}};
return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
}
// Replaces n by floor(n / pow(5, N)) returning true if and only if n is
// divisible by pow(5, N).
// Precondition: n <= 2 * pow(5, N + 1).
// Replaces n by floor(n / pow(10, N)) returning true if and only if n is
// divisible by pow(10, N).
// Precondition: n <= pow(10, N + 1).
template <int N>
bool check_divisibility_and_divide_by_pow5(uint32_t& n) FMT_NOEXCEPT {
static constexpr struct {
uint32_t magic_number;
int bits_for_comparison;
uint32_t threshold;
int shift_amount;
} infos[] = {{0xcccd, 16, 0x3333, 18}, {0xa429, 8, 0x0a, 20}};
constexpr auto info = infos[N - 1];
n *= info.magic_number;
const uint32_t comparison_mask = (1u << info.bits_for_comparison) - 1;
bool result = (n & comparison_mask) <= info.threshold;
bool check_divisibility_and_divide_by_pow10(uint32_t& n) noexcept {
// The numbers below are chosen such that:
// 1. floor(n/d) = floor(nm / 2^k) where d=10 or d=100,
// 2. nm mod 2^k < m if and only if n is divisible by d,
// where m is magic_number, k is shift_amount
// and d is divisor.
//
// Item 1 is a common technique of replacing division by a constant with
// multiplication, see e.g. "Division by Invariant Integers Using
// Multiplication" by Granlund and Montgomery (1994). magic_number (m) is set
// to ceil(2^k/d) for large enough k.
// The idea for item 2 originates from Schubfach.
constexpr auto info = div_small_pow10_infos[N - 1];
FMT_ASSERT(n <= info.divisor * 10, "n is too large");
constexpr uint32_t magic_number =
(1u << info.shift_amount) / info.divisor + 1;
n *= magic_number;
const uint32_t comparison_mask = (1u << info.shift_amount) - 1;
bool result = (n & comparison_mask) < magic_number;
n >>= info.shift_amount;
return result;
}
// Computes floor(n / pow(10, N)) for small n and N.
// Precondition: n <= pow(10, N + 1).
template <int N> uint32_t small_division_by_pow10(uint32_t n) FMT_NOEXCEPT {
static constexpr struct {
uint32_t magic_number;
int shift_amount;
uint32_t divisor_times_10;
} infos[] = {{0xcccd, 19, 100}, {0xa3d8, 22, 1000}};
constexpr auto info = infos[N - 1];
FMT_ASSERT(n <= info.divisor_times_10, "n is too large");
return n * info.magic_number >> info.shift_amount;
template <int N> uint32_t small_division_by_pow10(uint32_t n) noexcept {
constexpr auto info = div_small_pow10_infos[N - 1];
FMT_ASSERT(n <= info.divisor * 10, "n is too large");
constexpr uint32_t magic_number =
(1u << info.shift_amount) / info.divisor + 1;
return (n * magic_number) >> info.shift_amount;
}
// Computes floor(n / 10^(kappa + 1)) (float)
inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) FMT_NOEXCEPT {
return n / float_info<float>::big_divisor;
inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) noexcept {
// 1374389535 = ceil(2^37/100)
return static_cast<uint32_t>((static_cast<uint64_t>(n) * 1374389535) >> 37);
}
// Computes floor(n / 10^(kappa + 1)) (double)
inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) FMT_NOEXCEPT {
return umul128_upper64(n, 0x83126e978d4fdf3c) >> 9;
inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) noexcept {
// 2361183241434822607 = ceil(2^(64+7)/1000)
return umul128_upper64(n, 2361183241434822607ull) >> 7;
}
// Various subroutines using pow10 cache
template <class T> struct cache_accessor;
template <typename T> struct cache_accessor;
template <> struct cache_accessor<float> {
using carrier_uint = float_info<float>::carrier_uint;
using cache_entry_type = uint64_t;
static uint64_t get_cached_power(int k) FMT_NOEXCEPT {
static uint64_t get_cached_power(int k) noexcept {
FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
"k is out of range");
static constexpr const uint64_t pow10_significands[] = {
@@ -1071,54 +278,65 @@ template <> struct cache_accessor<float> {
0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000,
0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000,
0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0,
0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940984,
0xa18f07d736b90be5, 0xc9f2c9cd04674ede, 0xfc6f7c4045812296,
0x9dc5ada82b70b59d, 0xc5371912364ce305, 0xf684df56c3e01bc6,
0x9a130b963a6c115c, 0xc097ce7bc90715b3, 0xf0bdc21abb48db20,
0x96769950b50d88f4, 0xbc143fa4e250eb31, 0xeb194f8e1ae525fd,
0x92efd1b8d0cf37be, 0xb7abc627050305ad, 0xe596b7b0c643c719,
0x8f7e32ce7bea5c6f, 0xb35dbf821ae4f38b, 0xe0352f62a19e306e};
0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940985,
0xa18f07d736b90be6, 0xc9f2c9cd04674edf, 0xfc6f7c4045812297,
0x9dc5ada82b70b59e, 0xc5371912364ce306, 0xf684df56c3e01bc7,
0x9a130b963a6c115d, 0xc097ce7bc90715b4, 0xf0bdc21abb48db21,
0x96769950b50d88f5, 0xbc143fa4e250eb32, 0xeb194f8e1ae525fe,
0x92efd1b8d0cf37bf, 0xb7abc627050305ae, 0xe596b7b0c643c71a,
0x8f7e32ce7bea5c70, 0xb35dbf821ae4f38c, 0xe0352f62a19e306f};
return pow10_significands[k - float_info<float>::min_k];
}
static carrier_uint compute_mul(carrier_uint u,
const cache_entry_type& cache) FMT_NOEXCEPT {
return umul96_upper32(u, cache);
struct compute_mul_result {
carrier_uint result;
bool is_integer;
};
struct compute_mul_parity_result {
bool parity;
bool is_integer;
};
static compute_mul_result compute_mul(
carrier_uint u, const cache_entry_type& cache) noexcept {
auto r = umul96_upper64(u, cache);
return {static_cast<carrier_uint>(r >> 32),
static_cast<carrier_uint>(r) == 0};
}
static uint32_t compute_delta(const cache_entry_type& cache,
int beta_minus_1) FMT_NOEXCEPT {
return static_cast<uint32_t>(cache >> (64 - 1 - beta_minus_1));
int beta) noexcept {
return static_cast<uint32_t>(cache >> (64 - 1 - beta));
}
static bool compute_mul_parity(carrier_uint two_f,
const cache_entry_type& cache,
int beta_minus_1) FMT_NOEXCEPT {
FMT_ASSERT(beta_minus_1 >= 1, "");
FMT_ASSERT(beta_minus_1 < 64, "");
static compute_mul_parity_result compute_mul_parity(
carrier_uint two_f, const cache_entry_type& cache, int beta) noexcept {
FMT_ASSERT(beta >= 1, "");
FMT_ASSERT(beta < 64, "");
return ((umul96_lower64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
auto r = umul96_lower64(two_f, cache);
return {((r >> (64 - beta)) & 1) != 0,
static_cast<uint32_t>(r >> (32 - beta)) == 0};
}
static carrier_uint compute_left_endpoint_for_shorter_interval_case(
const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
const cache_entry_type& cache, int beta) noexcept {
return static_cast<carrier_uint>(
(cache - (cache >> (float_info<float>::significand_bits + 2))) >>
(64 - float_info<float>::significand_bits - 1 - beta_minus_1));
(cache - (cache >> (num_significand_bits<float>() + 2))) >>
(64 - num_significand_bits<float>() - 1 - beta));
}
static carrier_uint compute_right_endpoint_for_shorter_interval_case(
const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
const cache_entry_type& cache, int beta) noexcept {
return static_cast<carrier_uint>(
(cache + (cache >> (float_info<float>::significand_bits + 1))) >>
(64 - float_info<float>::significand_bits - 1 - beta_minus_1));
(cache + (cache >> (num_significand_bits<float>() + 1))) >>
(64 - num_significand_bits<float>() - 1 - beta));
}
static carrier_uint compute_round_up_for_shorter_interval_case(
const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
const cache_entry_type& cache, int beta) noexcept {
return (static_cast<carrier_uint>(
cache >>
(64 - float_info<float>::significand_bits - 2 - beta_minus_1)) +
cache >> (64 - num_significand_bits<float>() - 2 - beta)) +
1) /
2;
}
@@ -1126,13 +344,13 @@ template <> struct cache_accessor<float> {
template <> struct cache_accessor<double> {
using carrier_uint = float_info<double>::carrier_uint;
using cache_entry_type = uint128_wrapper;
using cache_entry_type = uint128_fallback;
static uint128_wrapper get_cached_power(int k) FMT_NOEXCEPT {
static uint128_fallback get_cached_power(int k) noexcept {
FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
"k is out of range");
static constexpr const uint128_wrapper pow10_significands[] = {
static constexpr const uint128_fallback pow10_significands[] = {
#if FMT_USE_FULL_CACHE_DRAGONBOX
{0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
{0x9faacf3df73609b1, 0x77b191618c54e9ad},
@@ -1482,278 +700,293 @@ template <> struct cache_accessor<double> {
{0x85a36366eb71f041, 0x47a6da2b7f864750},
{0xa70c3c40a64e6c51, 0x999090b65f67d924},
{0xd0cf4b50cfe20765, 0xfff4b4e3f741cf6d},
{0x82818f1281ed449f, 0xbff8f10e7a8921a4},
{0xa321f2d7226895c7, 0xaff72d52192b6a0d},
{0xcbea6f8ceb02bb39, 0x9bf4f8a69f764490},
{0xfee50b7025c36a08, 0x02f236d04753d5b4},
{0x9f4f2726179a2245, 0x01d762422c946590},
{0xc722f0ef9d80aad6, 0x424d3ad2b7b97ef5},
{0xf8ebad2b84e0d58b, 0xd2e0898765a7deb2},
{0x9b934c3b330c8577, 0x63cc55f49f88eb2f},
{0xc2781f49ffcfa6d5, 0x3cbf6b71c76b25fb},
{0xf316271c7fc3908a, 0x8bef464e3945ef7a},
{0x97edd871cfda3a56, 0x97758bf0e3cbb5ac},
{0xbde94e8e43d0c8ec, 0x3d52eeed1cbea317},
{0xed63a231d4c4fb27, 0x4ca7aaa863ee4bdd},
{0x945e455f24fb1cf8, 0x8fe8caa93e74ef6a},
{0xb975d6b6ee39e436, 0xb3e2fd538e122b44},
{0xe7d34c64a9c85d44, 0x60dbbca87196b616},
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{0x9d174b2dcec0e47b, 0x62eb0d64283f9c77},
{0xc45d1df942711d9a, 0x3ba5d0bd324f8395},
{0xf5746577930d6500, 0xca8f44ec7ee3647a},
{0x9968bf6abbe85f20, 0x7e998b13cf4e1ecc},
{0xbfc2ef456ae276e8, 0x9e3fedd8c321a67f},
{0xefb3ab16c59b14a2, 0xc5cfe94ef3ea101f},
{0x95d04aee3b80ece5, 0xbba1f1d158724a13},
{0xbb445da9ca61281f, 0x2a8a6e45ae8edc98},
{0xea1575143cf97226, 0xf52d09d71a3293be},
{0x924d692ca61be758, 0x593c2626705f9c57},
{0xb6e0c377cfa2e12e, 0x6f8b2fb00c77836d},
{0xe498f455c38b997a, 0x0b6dfb9c0f956448},
{0x8edf98b59a373fec, 0x4724bd4189bd5ead},
{0xb2977ee300c50fe7, 0x58edec91ec2cb658},
{0xdf3d5e9bc0f653e1, 0x2f2967b66737e3ee},
{0x8b865b215899f46c, 0xbd79e0d20082ee75},
{0xae67f1e9aec07187, 0xecd8590680a3aa12},
{0xda01ee641a708de9, 0xe80e6f4820cc9496},
{0x884134fe908658b2, 0x3109058d147fdcde},
{0xaa51823e34a7eede, 0xbd4b46f0599fd416},
{0xd4e5e2cdc1d1ea96, 0x6c9e18ac7007c91b},
{0x850fadc09923329e, 0x03e2cf6bc604ddb1},
{0xa6539930bf6bff45, 0x84db8346b786151d},
{0xcfe87f7cef46ff16, 0xe612641865679a64},
{0x81f14fae158c5f6e, 0x4fcb7e8f3f60c07f},
{0xa26da3999aef7749, 0xe3be5e330f38f09e},
{0xcb090c8001ab551c, 0x5cadf5bfd3072cc6},
{0xfdcb4fa002162a63, 0x73d9732fc7c8f7f7},
{0x9e9f11c4014dda7e, 0x2867e7fddcdd9afb},
{0xc646d63501a1511d, 0xb281e1fd541501b9},
{0xf7d88bc24209a565, 0x1f225a7ca91a4227},
{0x9ae757596946075f, 0x3375788de9b06959},
{0xc1a12d2fc3978937, 0x0052d6b1641c83af},
{0xf209787bb47d6b84, 0xc0678c5dbd23a49b},
{0x9745eb4d50ce6332, 0xf840b7ba963646e1},
{0xbd176620a501fbff, 0xb650e5a93bc3d899},
{0xec5d3fa8ce427aff, 0xa3e51f138ab4cebf},
{0x93ba47c980e98cdf, 0xc66f336c36b10138},
{0xb8a8d9bbe123f017, 0xb80b0047445d4185},
{0xe6d3102ad96cec1d, 0xa60dc059157491e6},
{0x9043ea1ac7e41392, 0x87c89837ad68db30},
{0xb454e4a179dd1877, 0x29babe4598c311fc},
{0xe16a1dc9d8545e94, 0xf4296dd6fef3d67b},
{0x8ce2529e2734bb1d, 0x1899e4a65f58660d},
{0xb01ae745b101e9e4, 0x5ec05dcff72e7f90},
{0xdc21a1171d42645d, 0x76707543f4fa1f74},
{0x899504ae72497eba, 0x6a06494a791c53a9},
{0xabfa45da0edbde69, 0x0487db9d17636893},
{0xd6f8d7509292d603, 0x45a9d2845d3c42b7},
{0x865b86925b9bc5c2, 0x0b8a2392ba45a9b3},
{0xa7f26836f282b732, 0x8e6cac7768d7141f},
{0xd1ef0244af2364ff, 0x3207d795430cd927},
{0x8335616aed761f1f, 0x7f44e6bd49e807b9},
{0xa402b9c5a8d3a6e7, 0x5f16206c9c6209a7},
{0xcd036837130890a1, 0x36dba887c37a8c10},
{0x802221226be55a64, 0xc2494954da2c978a},
{0xa02aa96b06deb0fd, 0xf2db9baa10b7bd6d},
{0xc83553c5c8965d3d, 0x6f92829494e5acc8},
{0xfa42a8b73abbf48c, 0xcb772339ba1f17fa},
{0x9c69a97284b578d7, 0xff2a760414536efc},
{0xc38413cf25e2d70d, 0xfef5138519684abb},
{0xf46518c2ef5b8cd1, 0x7eb258665fc25d6a},
{0x98bf2f79d5993802, 0xef2f773ffbd97a62},
{0xbeeefb584aff8603, 0xaafb550ffacfd8fb},
{0xeeaaba2e5dbf6784, 0x95ba2a53f983cf39},
{0x952ab45cfa97a0b2, 0xdd945a747bf26184},
{0xba756174393d88df, 0x94f971119aeef9e5},
{0xe912b9d1478ceb17, 0x7a37cd5601aab85e},
{0x91abb422ccb812ee, 0xac62e055c10ab33b},
{0xb616a12b7fe617aa, 0x577b986b314d600a},
{0xe39c49765fdf9d94, 0xed5a7e85fda0b80c},
{0x8e41ade9fbebc27d, 0x14588f13be847308},
{0xb1d219647ae6b31c, 0x596eb2d8ae258fc9},
{0xde469fbd99a05fe3, 0x6fca5f8ed9aef3bc},
{0x8aec23d680043bee, 0x25de7bb9480d5855},
{0xada72ccc20054ae9, 0xaf561aa79a10ae6b},
{0xd910f7ff28069da4, 0x1b2ba1518094da05},
{0x87aa9aff79042286, 0x90fb44d2f05d0843},
{0xa99541bf57452b28, 0x353a1607ac744a54},
{0xd3fa922f2d1675f2, 0x42889b8997915ce9},
{0x847c9b5d7c2e09b7, 0x69956135febada12},
{0xa59bc234db398c25, 0x43fab9837e699096},
{0xcf02b2c21207ef2e, 0x94f967e45e03f4bc},
{0x8161afb94b44f57d, 0x1d1be0eebac278f6},
{0xa1ba1ba79e1632dc, 0x6462d92a69731733},
{0xca28a291859bbf93, 0x7d7b8f7503cfdcff},
{0xfcb2cb35e702af78, 0x5cda735244c3d43f},
{0x9defbf01b061adab, 0x3a0888136afa64a8},
{0xc56baec21c7a1916, 0x088aaa1845b8fdd1},
{0xf6c69a72a3989f5b, 0x8aad549e57273d46},
{0x9a3c2087a63f6399, 0x36ac54e2f678864c},
{0xc0cb28a98fcf3c7f, 0x84576a1bb416a7de},
{0xf0fdf2d3f3c30b9f, 0x656d44a2a11c51d6},
{0x969eb7c47859e743, 0x9f644ae5a4b1b326},
{0xbc4665b596706114, 0x873d5d9f0dde1fef},
{0xeb57ff22fc0c7959, 0xa90cb506d155a7eb},
{0x9316ff75dd87cbd8, 0x09a7f12442d588f3},
{0xb7dcbf5354e9bece, 0x0c11ed6d538aeb30},
{0xe5d3ef282a242e81, 0x8f1668c8a86da5fb},
{0x8fa475791a569d10, 0xf96e017d694487bd},
{0xb38d92d760ec4455, 0x37c981dcc395a9ad},
{0xe070f78d3927556a, 0x85bbe253f47b1418},
{0x8c469ab843b89562, 0x93956d7478ccec8f},
{0xaf58416654a6babb, 0x387ac8d1970027b3},
{0xdb2e51bfe9d0696a, 0x06997b05fcc0319f},
{0x88fcf317f22241e2, 0x441fece3bdf81f04},
{0xab3c2fddeeaad25a, 0xd527e81cad7626c4},
{0xd60b3bd56a5586f1, 0x8a71e223d8d3b075},
{0x85c7056562757456, 0xf6872d5667844e4a},
{0xa738c6bebb12d16c, 0xb428f8ac016561dc},
{0xd106f86e69d785c7, 0xe13336d701beba53},
{0x82a45b450226b39c, 0xecc0024661173474},
{0xa34d721642b06084, 0x27f002d7f95d0191},
{0xcc20ce9bd35c78a5, 0x31ec038df7b441f5},
{0xff290242c83396ce, 0x7e67047175a15272},
{0x9f79a169bd203e41, 0x0f0062c6e984d387},
{0xc75809c42c684dd1, 0x52c07b78a3e60869},
{0xf92e0c3537826145, 0xa7709a56ccdf8a83},
{0x9bbcc7a142b17ccb, 0x88a66076400bb692},
{0xc2abf989935ddbfe, 0x6acff893d00ea436},
{0xf356f7ebf83552fe, 0x0583f6b8c4124d44},
{0x98165af37b2153de, 0xc3727a337a8b704b},
{0xbe1bf1b059e9a8d6, 0x744f18c0592e4c5d},
{0xeda2ee1c7064130c, 0x1162def06f79df74},
{0x9485d4d1c63e8be7, 0x8addcb5645ac2ba9},
{0xb9a74a0637ce2ee1, 0x6d953e2bd7173693},
{0xe8111c87c5c1ba99, 0xc8fa8db6ccdd0438},
{0x910ab1d4db9914a0, 0x1d9c9892400a22a3},
{0xb54d5e4a127f59c8, 0x2503beb6d00cab4c},
{0xe2a0b5dc971f303a, 0x2e44ae64840fd61e},
{0x8da471a9de737e24, 0x5ceaecfed289e5d3},
{0xb10d8e1456105dad, 0x7425a83e872c5f48},
{0xdd50f1996b947518, 0xd12f124e28f7771a},
{0x8a5296ffe33cc92f, 0x82bd6b70d99aaa70},
{0xace73cbfdc0bfb7b, 0x636cc64d1001550c},
{0xd8210befd30efa5a, 0x3c47f7e05401aa4f},
{0x8714a775e3e95c78, 0x65acfaec34810a72},
{0xa8d9d1535ce3b396, 0x7f1839a741a14d0e},
{0xd31045a8341ca07c, 0x1ede48111209a051},
{0x83ea2b892091e44d, 0x934aed0aab460433},
{0xa4e4b66b68b65d60, 0xf81da84d56178540},
{0xce1de40642e3f4b9, 0x36251260ab9d668f},
{0x80d2ae83e9ce78f3, 0xc1d72b7c6b42601a},
{0xa1075a24e4421730, 0xb24cf65b8612f820},
{0xc94930ae1d529cfc, 0xdee033f26797b628},
{0xfb9b7cd9a4a7443c, 0x169840ef017da3b2},
{0x9d412e0806e88aa5, 0x8e1f289560ee864f},
{0xc491798a08a2ad4e, 0xf1a6f2bab92a27e3},
{0xf5b5d7ec8acb58a2, 0xae10af696774b1dc},
{0x9991a6f3d6bf1765, 0xacca6da1e0a8ef2a},
{0xbff610b0cc6edd3f, 0x17fd090a58d32af4},
{0xeff394dcff8a948e, 0xddfc4b4cef07f5b1},
{0x95f83d0a1fb69cd9, 0x4abdaf101564f98f},
{0xbb764c4ca7a4440f, 0x9d6d1ad41abe37f2},
{0xea53df5fd18d5513, 0x84c86189216dc5ee},
{0x92746b9be2f8552c, 0x32fd3cf5b4e49bb5},
{0xb7118682dbb66a77, 0x3fbc8c33221dc2a2},
{0xe4d5e82392a40515, 0x0fabaf3feaa5334b},
{0x8f05b1163ba6832d, 0x29cb4d87f2a7400f},
{0xb2c71d5bca9023f8, 0x743e20e9ef511013},
{0xdf78e4b2bd342cf6, 0x914da9246b255417},
{0x8bab8eefb6409c1a, 0x1ad089b6c2f7548f},
{0xae9672aba3d0c320, 0xa184ac2473b529b2},
{0xda3c0f568cc4f3e8, 0xc9e5d72d90a2741f},
{0x8865899617fb1871, 0x7e2fa67c7a658893},
{0xaa7eebfb9df9de8d, 0xddbb901b98feeab8},
{0xd51ea6fa85785631, 0x552a74227f3ea566},
{0x8533285c936b35de, 0xd53a88958f872760},
{0xa67ff273b8460356, 0x8a892abaf368f138},
{0xd01fef10a657842c, 0x2d2b7569b0432d86},
{0x8213f56a67f6b29b, 0x9c3b29620e29fc74},
{0xa298f2c501f45f42, 0x8349f3ba91b47b90},
{0xcb3f2f7642717713, 0x241c70a936219a74},
{0xfe0efb53d30dd4d7, 0xed238cd383aa0111},
{0x9ec95d1463e8a506, 0xf4363804324a40ab},
{0xc67bb4597ce2ce48, 0xb143c6053edcd0d6},
{0xf81aa16fdc1b81da, 0xdd94b7868e94050b},
{0x9b10a4e5e9913128, 0xca7cf2b4191c8327},
{0xc1d4ce1f63f57d72, 0xfd1c2f611f63a3f1},
{0xf24a01a73cf2dccf, 0xbc633b39673c8ced},
{0x976e41088617ca01, 0xd5be0503e085d814},
{0xbd49d14aa79dbc82, 0x4b2d8644d8a74e19},
{0xec9c459d51852ba2, 0xddf8e7d60ed1219f},
{0x93e1ab8252f33b45, 0xcabb90e5c942b504},
{0xb8da1662e7b00a17, 0x3d6a751f3b936244},
{0xe7109bfba19c0c9d, 0x0cc512670a783ad5},
{0x906a617d450187e2, 0x27fb2b80668b24c6},
{0xb484f9dc9641e9da, 0xb1f9f660802dedf7},
{0xe1a63853bbd26451, 0x5e7873f8a0396974},
{0x8d07e33455637eb2, 0xdb0b487b6423e1e9},
{0xb049dc016abc5e5f, 0x91ce1a9a3d2cda63},
{0xdc5c5301c56b75f7, 0x7641a140cc7810fc},
{0x89b9b3e11b6329ba, 0xa9e904c87fcb0a9e},
{0xac2820d9623bf429, 0x546345fa9fbdcd45},
{0xd732290fbacaf133, 0xa97c177947ad4096},
{0x867f59a9d4bed6c0, 0x49ed8eabcccc485e},
{0xa81f301449ee8c70, 0x5c68f256bfff5a75},
{0xd226fc195c6a2f8c, 0x73832eec6fff3112},
{0x83585d8fd9c25db7, 0xc831fd53c5ff7eac},
{0xa42e74f3d032f525, 0xba3e7ca8b77f5e56},
{0xcd3a1230c43fb26f, 0x28ce1bd2e55f35ec},
{0x80444b5e7aa7cf85, 0x7980d163cf5b81b4},
{0xa0555e361951c366, 0xd7e105bcc3326220},
{0xc86ab5c39fa63440, 0x8dd9472bf3fefaa8},
{0xfa856334878fc150, 0xb14f98f6f0feb952},
{0x9c935e00d4b9d8d2, 0x6ed1bf9a569f33d4},
{0xc3b8358109e84f07, 0x0a862f80ec4700c9},
{0xf4a642e14c6262c8, 0xcd27bb612758c0fb},
{0x98e7e9cccfbd7dbd, 0x8038d51cb897789d},
{0xbf21e44003acdd2c, 0xe0470a63e6bd56c4},
{0xeeea5d5004981478, 0x1858ccfce06cac75},
{0x95527a5202df0ccb, 0x0f37801e0c43ebc9},
{0xbaa718e68396cffd, 0xd30560258f54e6bb},
{0xe950df20247c83fd, 0x47c6b82ef32a206a},
{0x91d28b7416cdd27e, 0x4cdc331d57fa5442},
{0xb6472e511c81471d, 0xe0133fe4adf8e953},
{0xe3d8f9e563a198e5, 0x58180fddd97723a7},
{0x8e679c2f5e44ff8f, 0x570f09eaa7ea7649},
{0xb201833b35d63f73, 0x2cd2cc6551e513db},
{0xde81e40a034bcf4f, 0xf8077f7ea65e58d2},
{0x8b112e86420f6191, 0xfb04afaf27faf783},
{0xadd57a27d29339f6, 0x79c5db9af1f9b564},
{0xd94ad8b1c7380874, 0x18375281ae7822bd},
{0x87cec76f1c830548, 0x8f2293910d0b15b6},
{0xa9c2794ae3a3c69a, 0xb2eb3875504ddb23},
{0xd433179d9c8cb841, 0x5fa60692a46151ec},
{0x849feec281d7f328, 0xdbc7c41ba6bcd334},
{0xa5c7ea73224deff3, 0x12b9b522906c0801},
{0xcf39e50feae16bef, 0xd768226b34870a01},
{0x81842f29f2cce375, 0xe6a1158300d46641},
{0xa1e53af46f801c53, 0x60495ae3c1097fd1},
{0xca5e89b18b602368, 0x385bb19cb14bdfc5},
{0xfcf62c1dee382c42, 0x46729e03dd9ed7b6},
{0x9e19db92b4e31ba9, 0x6c07a2c26a8346d2},
{0xc5a05277621be293, 0xc7098b7305241886},
{0xf70867153aa2db38, 0xb8cbee4fc66d1ea8},
{0x9a65406d44a5c903, 0x737f74f1dc043329},
{0xc0fe908895cf3b44, 0x505f522e53053ff3},
{0xf13e34aabb430a15, 0x647726b9e7c68ff0},
{0x96c6e0eab509e64d, 0x5eca783430dc19f6},
{0xbc789925624c5fe0, 0xb67d16413d132073},
{0xeb96bf6ebadf77d8, 0xe41c5bd18c57e890},
{0x933e37a534cbaae7, 0x8e91b962f7b6f15a},
{0xb80dc58e81fe95a1, 0x723627bbb5a4adb1},
{0xe61136f2227e3b09, 0xcec3b1aaa30dd91d},
{0x8fcac257558ee4e6, 0x213a4f0aa5e8a7b2},
{0xb3bd72ed2af29e1f, 0xa988e2cd4f62d19e},
{0xe0accfa875af45a7, 0x93eb1b80a33b8606},
{0x8c6c01c9498d8b88, 0xbc72f130660533c4},
{0xaf87023b9bf0ee6a, 0xeb8fad7c7f8680b5},
{ 0xdb68c2ca82ed2a05,
0xa67398db9f6820e2 }
#else
{0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
{0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
@@ -1768,17 +1001,17 @@ template <> struct cache_accessor<double> {
{0xf1c90080baf72cb1, 0x5324c68b12dd6339},
{0xc350000000000000, 0x0000000000000000},
{0x9dc5ada82b70b59d, 0xf020000000000000},
{0xfee50b7025c36a08, 0x02f236d04753d5b4},
{0xcde6fd5e09abcf26, 0xed4c0226b55e6f86},
{0xa6539930bf6bff45, 0x84db8346b786151c},
{0x865b86925b9bc5c2, 0x0b8a2392ba45a9b2},
{0xd910f7ff28069da4, 0x1b2ba1518094da04},
{0xaf58416654a6babb, 0x387ac8d1970027b2},
{0x8da471a9de737e24, 0x5ceaecfed289e5d2},
{0xe4d5e82392a40515, 0x0fabaf3feaa5334a},
{0xb8da1662e7b00a17, 0x3d6a751f3b936243},
{ 0x95527a5202df0ccb,
0x0f37801e0c43ebc8 }
{0xfee50b7025c36a08, 0x02f236d04753d5b5},
{0xcde6fd5e09abcf26, 0xed4c0226b55e6f87},
{0xa6539930bf6bff45, 0x84db8346b786151d},
{0x865b86925b9bc5c2, 0x0b8a2392ba45a9b3},
{0xd910f7ff28069da4, 0x1b2ba1518094da05},
{0xaf58416654a6babb, 0x387ac8d1970027b3},
{0x8da471a9de737e24, 0x5ceaecfed289e5d3},
{0xe4d5e82392a40515, 0x0fabaf3feaa5334b},
{0xb8da1662e7b00a17, 0x3d6a751f3b936244},
{0x95527a5202df0ccb, 0x0f37801e0c43ebc9},
{0xf13e34aabb430a15, 0x647726b9e7c68ff0}
#endif
};
@@ -1796,15 +1029,6 @@ template <> struct cache_accessor<double> {
0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
static constexpr const uint32_t pow10_recovery_errors[] = {
0x50001400, 0x54044100, 0x54014555, 0x55954415, 0x54115555, 0x00000001,
0x50000000, 0x00104000, 0x54010004, 0x05004001, 0x55555544, 0x41545555,
0x54040551, 0x15445545, 0x51555514, 0x10000015, 0x00101100, 0x01100015,
0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x04450514, 0x45414110,
0x55555145, 0x50544050, 0x15040155, 0x11054140, 0x50111514, 0x11451454,
0x00400541, 0x00000000, 0x55555450, 0x10056551, 0x10054011, 0x55551014,
0x69514555, 0x05151109, 0x00155555};
static const int compression_ratio = 27;
// Compute base index.
@@ -1813,7 +1037,7 @@ template <> struct cache_accessor<double> {
int offset = k - kb;
// Get base cache.
uint128_wrapper base_cache = pow10_significands[cache_index];
uint128_fallback base_cache = pow10_significands[cache_index];
if (offset == 0) return base_cache;
// Compute the required amount of bit-shift.
@@ -1822,9 +1046,8 @@ template <> struct cache_accessor<double> {
// Try to recover the real cache.
uint64_t pow5 = powers_of_5_64[offset];
uint128_wrapper recovered_cache = umul128(base_cache.high(), pow5);
uint128_wrapper middle_low =
umul128(base_cache.low() - (kb < 0 ? 1u : 0u), pow5);
uint128_fallback recovered_cache = umul128(base_cache.high(), pow5);
uint128_fallback middle_low = umul128(base_cache.low(), pow5);
recovered_cache += middle_low.high();
@@ -1832,227 +1055,172 @@ template <> struct cache_accessor<double> {
uint64_t middle_to_low = recovered_cache.low() << (64 - alpha);
recovered_cache =
uint128_wrapper{(recovered_cache.low() >> alpha) | high_to_middle,
((middle_low.low() >> alpha) | middle_to_low)};
if (kb < 0) recovered_cache += 1;
// Get error.
int error_idx = (k - float_info<double>::min_k) / 16;
uint32_t error = (pow10_recovery_errors[error_idx] >>
((k - float_info<double>::min_k) % 16) * 2) &
0x3;
// Add the error back.
FMT_ASSERT(recovered_cache.low() + error >= recovered_cache.low(), "");
return {recovered_cache.high(), recovered_cache.low() + error};
uint128_fallback{(recovered_cache.low() >> alpha) | high_to_middle,
((middle_low.low() >> alpha) | middle_to_low)};
FMT_ASSERT(recovered_cache.low() + 1 != 0, "");
return {recovered_cache.high(), recovered_cache.low() + 1};
#endif
}
static carrier_uint compute_mul(carrier_uint u,
const cache_entry_type& cache) FMT_NOEXCEPT {
return umul192_upper64(u, cache);
struct compute_mul_result {
carrier_uint result;
bool is_integer;
};
struct compute_mul_parity_result {
bool parity;
bool is_integer;
};
static compute_mul_result compute_mul(
carrier_uint u, const cache_entry_type& cache) noexcept {
auto r = umul192_upper128(u, cache);
return {r.high(), r.low() == 0};
}
static uint32_t compute_delta(cache_entry_type const& cache,
int beta_minus_1) FMT_NOEXCEPT {
return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta_minus_1));
int beta) noexcept {
return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta));
}
static bool compute_mul_parity(carrier_uint two_f,
const cache_entry_type& cache,
int beta_minus_1) FMT_NOEXCEPT {
FMT_ASSERT(beta_minus_1 >= 1, "");
FMT_ASSERT(beta_minus_1 < 64, "");
static compute_mul_parity_result compute_mul_parity(
carrier_uint two_f, const cache_entry_type& cache, int beta) noexcept {
FMT_ASSERT(beta >= 1, "");
FMT_ASSERT(beta < 64, "");
return ((umul192_middle64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
auto r = umul192_lower128(two_f, cache);
return {((r.high() >> (64 - beta)) & 1) != 0,
((r.high() << beta) | (r.low() >> (64 - beta))) == 0};
}
static carrier_uint compute_left_endpoint_for_shorter_interval_case(
const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
const cache_entry_type& cache, int beta) noexcept {
return (cache.high() -
(cache.high() >> (float_info<double>::significand_bits + 2))) >>
(64 - float_info<double>::significand_bits - 1 - beta_minus_1);
(cache.high() >> (num_significand_bits<double>() + 2))) >>
(64 - num_significand_bits<double>() - 1 - beta);
}
static carrier_uint compute_right_endpoint_for_shorter_interval_case(
const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
const cache_entry_type& cache, int beta) noexcept {
return (cache.high() +
(cache.high() >> (float_info<double>::significand_bits + 1))) >>
(64 - float_info<double>::significand_bits - 1 - beta_minus_1);
(cache.high() >> (num_significand_bits<double>() + 1))) >>
(64 - num_significand_bits<double>() - 1 - beta);
}
static carrier_uint compute_round_up_for_shorter_interval_case(
const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
return ((cache.high() >>
(64 - float_info<double>::significand_bits - 2 - beta_minus_1)) +
const cache_entry_type& cache, int beta) noexcept {
return ((cache.high() >> (64 - num_significand_bits<double>() - 2 - beta)) +
1) /
2;
}
};
// Various integer checks
template <class T>
bool is_left_endpoint_integer_shorter_interval(int exponent) FMT_NOEXCEPT {
return exponent >=
float_info<
T>::case_shorter_interval_left_endpoint_lower_threshold &&
exponent <=
float_info<T>::case_shorter_interval_left_endpoint_upper_threshold;
}
template <class T>
bool is_endpoint_integer(typename float_info<T>::carrier_uint two_f,
int exponent, int minus_k) FMT_NOEXCEPT {
if (exponent < float_info<T>::case_fc_pm_half_lower_threshold) return false;
// For k >= 0.
if (exponent <= float_info<T>::case_fc_pm_half_upper_threshold) return true;
// For k < 0.
if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
return divisible_by_power_of_5(two_f, minus_k);
FMT_FUNC uint128_fallback get_cached_power(int k) noexcept {
return cache_accessor<double>::get_cached_power(k);
}
template <class T>
bool is_center_integer(typename float_info<T>::carrier_uint two_f, int exponent,
int minus_k) FMT_NOEXCEPT {
// Exponent for 5 is negative.
if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
if (exponent > float_info<T>::case_fc_upper_threshold)
return divisible_by_power_of_5(two_f, minus_k);
// Both exponents are nonnegative.
if (exponent >= float_info<T>::case_fc_lower_threshold) return true;
// Exponent for 2 is negative.
return divisible_by_power_of_2(two_f, minus_k - exponent + 1);
// Various integer checks
template <typename T>
bool is_left_endpoint_integer_shorter_interval(int exponent) noexcept {
const int case_shorter_interval_left_endpoint_lower_threshold = 2;
const int case_shorter_interval_left_endpoint_upper_threshold = 3;
return exponent >= case_shorter_interval_left_endpoint_lower_threshold &&
exponent <= case_shorter_interval_left_endpoint_upper_threshold;
}
// Remove trailing zeros from n and return the number of zeros removed (float)
FMT_INLINE int remove_trailing_zeros(uint32_t& n) FMT_NOEXCEPT {
#ifdef FMT_BUILTIN_CTZ
int t = FMT_BUILTIN_CTZ(n);
#else
int t = ctz(n);
#endif
if (t > float_info<float>::max_trailing_zeros)
t = float_info<float>::max_trailing_zeros;
const uint32_t mod_inv1 = 0xcccccccd;
const uint32_t max_quotient1 = 0x33333333;
const uint32_t mod_inv2 = 0xc28f5c29;
const uint32_t max_quotient2 = 0x0a3d70a3;
FMT_INLINE int remove_trailing_zeros(uint32_t& n) noexcept {
FMT_ASSERT(n != 0, "");
// Modular inverse of 5 (mod 2^32): (mod_inv_5 * 5) mod 2^32 = 1.
// See https://github.com/fmtlib/fmt/issues/3163 for more details.
const uint32_t mod_inv_5 = 0xcccccccd;
// Casts are needed to workaround a bug in MSVC 19.22 and older.
const uint32_t mod_inv_25 =
static_cast<uint32_t>(uint64_t(mod_inv_5) * mod_inv_5);
int s = 0;
for (; s < t - 1; s += 2) {
if (n * mod_inv2 > max_quotient2) break;
n *= mod_inv2;
while (true) {
auto q = rotr(n * mod_inv_25, 2);
if (q > max_value<uint32_t>() / 100) break;
n = q;
s += 2;
}
if (s < t && n * mod_inv1 <= max_quotient1) {
n *= mod_inv1;
++s;
auto q = rotr(n * mod_inv_5, 1);
if (q <= max_value<uint32_t>() / 10) {
n = q;
s |= 1;
}
n >>= s;
return s;
}
// Removes trailing zeros and returns the number of zeros removed (double)
FMT_INLINE int remove_trailing_zeros(uint64_t& n) FMT_NOEXCEPT {
#ifdef FMT_BUILTIN_CTZLL
int t = FMT_BUILTIN_CTZLL(n);
#else
int t = ctzll(n);
#endif
if (t > float_info<double>::max_trailing_zeros)
t = float_info<double>::max_trailing_zeros;
// Divide by 10^8 and reduce to 32-bits
// Since ret_value.significand <= (2^64 - 1) / 1000 < 10^17,
// both of the quotient and the r should fit in 32-bits
FMT_INLINE int remove_trailing_zeros(uint64_t& n) noexcept {
FMT_ASSERT(n != 0, "");
const uint32_t mod_inv1 = 0xcccccccd;
const uint32_t max_quotient1 = 0x33333333;
const uint64_t mod_inv8 = 0xc767074b22e90e21;
const uint64_t max_quotient8 = 0x00002af31dc46118;
// This magic number is ceil(2^90 / 10^8).
constexpr uint64_t magic_number = 12379400392853802749ull;
auto nm = umul128(n, magic_number);
// If the number is divisible by 1'0000'0000, work with the quotient
if (t >= 8) {
auto quotient_candidate = n * mod_inv8;
// Is n is divisible by 10^8?
if ((nm.high() & ((1ull << (90 - 64)) - 1)) == 0 && nm.low() < magic_number) {
// If yes, work with the quotient.
auto n32 = static_cast<uint32_t>(nm.high() >> (90 - 64));
if (quotient_candidate <= max_quotient8) {
auto quotient = static_cast<uint32_t>(quotient_candidate >> 8);
const uint32_t mod_inv_5 = 0xcccccccd;
const uint32_t mod_inv_25 = mod_inv_5 * mod_inv_5;
int s = 8;
for (; s < t; ++s) {
if (quotient * mod_inv1 > max_quotient1) break;
quotient *= mod_inv1;
}
quotient >>= (s - 8);
n = quotient;
return s;
int s = 8;
while (true) {
auto q = rotr(n32 * mod_inv_25, 2);
if (q > max_value<uint32_t>() / 100) break;
n32 = q;
s += 2;
}
auto q = rotr(n32 * mod_inv_5, 1);
if (q <= max_value<uint32_t>() / 10) {
n32 = q;
s |= 1;
}
n = n32;
return s;
}
// Otherwise, work with the remainder
auto quotient = static_cast<uint32_t>(n / 100000000);
auto remainder = static_cast<uint32_t>(n - 100000000 * quotient);
// If n is not divisible by 10^8, work with n itself.
const uint64_t mod_inv_5 = 0xcccccccccccccccd;
const uint64_t mod_inv_25 = mod_inv_5 * mod_inv_5;
if (t == 0 || remainder * mod_inv1 > max_quotient1) {
return 0;
int s = 0;
while (true) {
auto q = rotr(n * mod_inv_25, 2);
if (q > max_value<uint64_t>() / 100) break;
n = q;
s += 2;
}
remainder *= mod_inv1;
if (t == 1 || remainder * mod_inv1 > max_quotient1) {
n = (remainder >> 1) + quotient * 10000000ull;
return 1;
auto q = rotr(n * mod_inv_5, 1);
if (q <= max_value<uint64_t>() / 10) {
n = q;
s |= 1;
}
remainder *= mod_inv1;
if (t == 2 || remainder * mod_inv1 > max_quotient1) {
n = (remainder >> 2) + quotient * 1000000ull;
return 2;
}
remainder *= mod_inv1;
if (t == 3 || remainder * mod_inv1 > max_quotient1) {
n = (remainder >> 3) + quotient * 100000ull;
return 3;
}
remainder *= mod_inv1;
if (t == 4 || remainder * mod_inv1 > max_quotient1) {
n = (remainder >> 4) + quotient * 10000ull;
return 4;
}
remainder *= mod_inv1;
if (t == 5 || remainder * mod_inv1 > max_quotient1) {
n = (remainder >> 5) + quotient * 1000ull;
return 5;
}
remainder *= mod_inv1;
if (t == 6 || remainder * mod_inv1 > max_quotient1) {
n = (remainder >> 6) + quotient * 100ull;
return 6;
}
remainder *= mod_inv1;
n = (remainder >> 7) + quotient * 10ull;
return 7;
return s;
}
// The main algorithm for shorter interval case
template <class T>
FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) FMT_NOEXCEPT {
template <typename T>
FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) noexcept {
decimal_fp<T> ret_value;
// Compute k and beta
const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent);
const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
const int beta = exponent + floor_log2_pow10(-minus_k);
// Compute xi and zi
using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
auto xi = cache_accessor<T>::compute_left_endpoint_for_shorter_interval_case(
cache, beta_minus_1);
cache, beta);
auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
cache, beta_minus_1);
cache, beta);
// If the left endpoint is not an integer, increase it
if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
@@ -2069,8 +1237,8 @@ FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) FMT_NOEXCEPT {
// Otherwise, compute the round-up of y
ret_value.significand =
cache_accessor<T>::compute_round_up_for_shorter_interval_case(
cache, beta_minus_1);
cache_accessor<T>::compute_round_up_for_shorter_interval_case(cache,
beta);
ret_value.exponent = minus_k;
// When tie occurs, choose one of them according to the rule
@@ -2085,7 +1253,7 @@ FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) FMT_NOEXCEPT {
return ret_value;
}
template <typename T> decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
template <typename T> decimal_fp<T> to_decimal(T x) noexcept {
// Step 1: integer promotion & Schubfach multiplier calculation.
using carrier_uint = typename float_info<T>::carrier_uint;
@@ -2094,23 +1262,25 @@ template <typename T> decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
// Extract significand bits and exponent bits.
const carrier_uint significand_mask =
(static_cast<carrier_uint>(1) << float_info<T>::significand_bits) - 1;
(static_cast<carrier_uint>(1) << num_significand_bits<T>()) - 1;
carrier_uint significand = (br & significand_mask);
int exponent = static_cast<int>((br & exponent_mask<T>()) >>
float_info<T>::significand_bits);
int exponent =
static_cast<int>((br & exponent_mask<T>()) >> num_significand_bits<T>());
if (exponent != 0) { // Check if normal.
exponent += float_info<T>::exponent_bias - float_info<T>::significand_bits;
exponent -= exponent_bias<T>() + num_significand_bits<T>();
// Shorter interval case; proceed like Schubfach.
// In fact, when exponent == 1 and significand == 0, the interval is
// regular. However, it can be shown that the end-results are anyway same.
if (significand == 0) return shorter_interval_case<T>(exponent);
significand |=
(static_cast<carrier_uint>(1) << float_info<T>::significand_bits);
significand |= (static_cast<carrier_uint>(1) << num_significand_bits<T>());
} else {
// Subnormal case; the interval is always regular.
if (significand == 0) return {0, 0};
exponent = float_info<T>::min_exponent - float_info<T>::significand_bits;
exponent =
std::numeric_limits<T>::min_exponent - num_significand_bits<T>() - 1;
}
const bool include_left_endpoint = (significand % 2 == 0);
@@ -2119,413 +1289,104 @@ template <typename T> decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
// Compute k and beta.
const int minus_k = floor_log10_pow2(exponent) - float_info<T>::kappa;
const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
const int beta = exponent + floor_log2_pow10(-minus_k);
// Compute zi and deltai
// Compute zi and deltai.
// 10^kappa <= deltai < 10^(kappa + 1)
const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta_minus_1);
const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta);
const carrier_uint two_fc = significand << 1;
const carrier_uint two_fr = two_fc | 1;
const carrier_uint zi =
cache_accessor<T>::compute_mul(two_fr << beta_minus_1, cache);
// Step 2: Try larger divisor; remove trailing zeros if necessary
// For the case of binary32, the result of integer check is not correct for
// 29711844 * 2^-82
// = 6.1442653300000000008655037797566933477355632930994033813476... * 10^-18
// and 29711844 * 2^-81
// = 1.2288530660000000001731007559513386695471126586198806762695... * 10^-17,
// and they are the unique counterexamples. However, since 29711844 is even,
// this does not cause any problem for the endpoints calculations; it can only
// cause a problem when we need to perform integer check for the center.
// Fortunately, with these inputs, that branch is never executed, so we are
// fine.
const typename cache_accessor<T>::compute_mul_result z_mul =
cache_accessor<T>::compute_mul((two_fc | 1) << beta, cache);
// Step 2: Try larger divisor; remove trailing zeros if necessary.
// Using an upper bound on zi, we might be able to optimize the division
// better than the compiler; we are computing zi / big_divisor here
// better than the compiler; we are computing zi / big_divisor here.
decimal_fp<T> ret_value;
ret_value.significand = divide_by_10_to_kappa_plus_1(zi);
uint32_t r = static_cast<uint32_t>(zi - float_info<T>::big_divisor *
ret_value.significand);
ret_value.significand = divide_by_10_to_kappa_plus_1(z_mul.result);
uint32_t r = static_cast<uint32_t>(z_mul.result - float_info<T>::big_divisor *
ret_value.significand);
if (r > deltai) {
goto small_divisor_case_label;
} else if (r < deltai) {
// Exclude the right endpoint if necessary
if (r == 0 && !include_right_endpoint &&
is_endpoint_integer<T>(two_fr, exponent, minus_k)) {
if (r < deltai) {
// Exclude the right endpoint if necessary.
if (r == 0 && (z_mul.is_integer & !include_right_endpoint)) {
--ret_value.significand;
r = float_info<T>::big_divisor;
goto small_divisor_case_label;
}
} else if (r > deltai) {
goto small_divisor_case_label;
} else {
// r == deltai; compare fractional parts
// Check conditions in the order different from the paper
// to take advantage of short-circuiting
const carrier_uint two_fl = two_fc - 1;
if ((!include_left_endpoint ||
!is_endpoint_integer<T>(two_fl, exponent, minus_k)) &&
!cache_accessor<T>::compute_mul_parity(two_fl, cache, beta_minus_1)) {
// r == deltai; compare fractional parts.
const typename cache_accessor<T>::compute_mul_parity_result x_mul =
cache_accessor<T>::compute_mul_parity(two_fc - 1, cache, beta);
if (!(x_mul.parity | (x_mul.is_integer & include_left_endpoint)))
goto small_divisor_case_label;
}
}
ret_value.exponent = minus_k + float_info<T>::kappa + 1;
// We may need to remove trailing zeros
// We may need to remove trailing zeros.
ret_value.exponent += remove_trailing_zeros(ret_value.significand);
return ret_value;
// Step 3: Find the significand with the smaller divisor
// Step 3: Find the significand with the smaller divisor.
small_divisor_case_label:
ret_value.significand *= 10;
ret_value.exponent = minus_k + float_info<T>::kappa;
const uint32_t mask = (1u << float_info<T>::kappa) - 1;
auto dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
uint32_t dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
const bool approx_y_parity =
((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
// Is dist divisible by 2^kappa?
if ((dist & mask) == 0) {
const bool approx_y_parity =
((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
dist >>= float_info<T>::kappa;
// Is dist divisible by 10^kappa?
const bool divisible_by_small_divisor =
check_divisibility_and_divide_by_pow10<float_info<T>::kappa>(dist);
// Is dist divisible by 5^kappa?
if (check_divisibility_and_divide_by_pow5<float_info<T>::kappa>(dist)) {
ret_value.significand += dist;
// Add dist / 10^kappa to the significand.
ret_value.significand += dist;
// Check z^(f) >= epsilon^(f)
// We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
// where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f)
// Since there are only 2 possibilities, we only need to care about the
// parity. Also, zi and r should have the same parity since the divisor
// is an even number
if (cache_accessor<T>::compute_mul_parity(two_fc, cache, beta_minus_1) !=
approx_y_parity) {
--ret_value.significand;
} else {
// If z^(f) >= epsilon^(f), we might have a tie
// when z^(f) == epsilon^(f), or equivalently, when y is an integer
if (is_center_integer<T>(two_fc, exponent, minus_k)) {
ret_value.significand = ret_value.significand % 2 == 0
? ret_value.significand
: ret_value.significand - 1;
}
}
}
// Is dist not divisible by 5^kappa?
else {
ret_value.significand += dist;
}
}
// Is dist not divisible by 2^kappa?
else {
// Since we know dist is small, we might be able to optimize the division
// better than the compiler; we are computing dist / small_divisor here
ret_value.significand +=
small_division_by_pow10<float_info<T>::kappa>(dist);
}
if (!divisible_by_small_divisor) return ret_value;
// Check z^(f) >= epsilon^(f).
// We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
// where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f).
// Since there are only 2 possibilities, we only need to care about the
// parity. Also, zi and r should have the same parity since the divisor
// is an even number.
const auto y_mul = cache_accessor<T>::compute_mul_parity(two_fc, cache, beta);
// If z^(f) >= epsilon^(f), we might have a tie when z^(f) == epsilon^(f),
// or equivalently, when y is an integer.
if (y_mul.parity != approx_y_parity)
--ret_value.significand;
else if (y_mul.is_integer & (ret_value.significand % 2 != 0))
--ret_value.significand;
return ret_value;
}
} // namespace dragonbox
// Formats a floating-point number using a variation of the Fixed-Precision
// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
// https://fmt.dev/papers/p372-steele.pdf.
FMT_CONSTEXPR20 inline void format_dragon(fp value, bool is_predecessor_closer,
int num_digits, buffer<char>& 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).
// 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.
int shift = is_predecessor_closer ? 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 <<= shift;
} 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;
}
}
// Invariant: value == (numerator / denominator) * pow(10, exp10).
if (num_digits < 0) {
// Generate the shortest representation.
if (!upper) upper = &lower;
bool even = (value.f & 1) == 0;
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<char>('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.try_resize(to_unsigned(num_digits));
exp10 -= num_digits - 1;
return;
}
numerator *= 10;
lower *= 10;
if (upper != &lower) *upper *= 10;
}
}
// Generate the given number of digits.
exp10 -= num_digits - 1;
if (num_digits == 0) {
denominator *= 10;
auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
buf.push_back(digit);
return;
}
buf.try_resize(to_unsigned(num_digits));
for (int i = 0; i < num_digits - 1; ++i) {
int digit = numerator.divmod_assign(denominator);
buf[i] = static_cast<char>('0' + digit);
numerator *= 10;
}
int digit = numerator.divmod_assign(denominator);
auto result = add_compare(numerator, numerator, denominator);
if (result > 0 || (result == 0 && (digit % 2) != 0)) {
if (digit == 9) {
const auto overflow = '0' + 10;
buf[num_digits - 1] = overflow;
// Propagate the carry.
for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
buf[i] = '0';
++buf[i - 1];
}
if (buf[0] == overflow) {
buf[0] = '1';
++exp10;
}
return;
}
++digit;
}
buf[num_digits - 1] = static_cast<char>('0' + digit);
}
template <typename Float>
FMT_HEADER_ONLY_CONSTEXPR20 int format_float(Float value, int precision,
float_specs specs,
buffer<char>& buf) {
// float is passed as double to reduce the number of instantiations.
static_assert(!std::is_same<Float, float>::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.try_resize(to_unsigned(precision));
fill_n(buf.data(), precision, '0');
return -precision;
}
if (specs.fallback) return snprintf_float(value, precision, specs, buf);
if (!is_constant_evaluated() && precision < 0) {
// Use Dragonbox for the shortest format.
if (specs.binary32) {
auto dec = dragonbox::to_decimal(static_cast<float>(value));
write<char>(buffer_appender<char>(buf), dec.significand);
return dec.exponent;
}
auto dec = dragonbox::to_decimal(static_cast<double>(value));
write<char>(buffer_appender<char>(buf), dec.significand);
return dec.exponent;
}
int exp = 0;
bool use_dragon = true;
if (is_fast_float<Float>()) {
// Use Grisu + Dragon4 for the given precision:
// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
const int min_exp = -60; // alpha in Grisu.
int cached_exp10 = 0; // K in Grisu.
fp normalized = normalize(fp(value));
const auto cached_pow = get_cached_power(
min_exp - (normalized.e + fp::num_significand_bits), cached_exp10);
normalized = normalized * cached_pow;
gen_digits_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
if (grisu_gen_digits(normalized, 1, exp, handler) != digits::error &&
!is_constant_evaluated()) {
exp += handler.exp10;
buf.try_resize(to_unsigned(handler.size));
use_dragon = false;
} else {
exp += handler.size - cached_exp10 - 1;
precision = handler.precision;
}
}
if (use_dragon) {
auto f = fp();
bool is_predecessor_closer =
specs.binary32 ? f.assign(static_cast<float>(value)) : f.assign(value);
// Limit precision to the maximum possible number of significant digits in
// an IEEE754 double because we don't need to generate zeros.
const int max_double_digits = 767;
if (precision > max_double_digits) precision = max_double_digits;
format_dragon(f, is_predecessor_closer, precision, buf, exp);
}
if (!fixed && !specs.showpoint) {
// Remove trailing zeros.
auto num_digits = buf.size();
while (num_digits > 0 && buf[num_digits - 1] == '0') {
--num_digits;
++exp;
}
buf.try_resize(num_digits);
}
return exp;
}
template <typename T>
int snprintf_float(T value, int precision, float_specs specs,
buffer<char>& 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<T, float>::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 }; // The 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<T, long double>()) *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 FMT_FUZZ
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 because 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) {
// The buffer will grow exponentially.
buf.try_reserve(buf.capacity() + 1);
continue;
}
auto size = to_unsigned(result);
// Size equal to capacity means that the last character was truncated.
if (size >= capacity) {
buf.try_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.try_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<int>(end - p - 1);
std::memmove(p, p + 1, to_unsigned(fraction_size));
buf.try_resize(size - 1);
return -fraction_size;
}
if (specs.format == float_format::hex) {
buf.try_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];
FMT_ASSERT(sign == '+' || sign == '-', "");
int exp = 0;
auto p = exp_pos + 2; // Skip 'e' and sign.
do {
FMT_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<int>(fraction_end - begin - 1);
std::memmove(begin + 1, begin + 2, to_unsigned(fraction_size));
}
buf.try_resize(to_unsigned(fraction_size) + offset + 1);
return exp - fraction_size;
}
}
} // namespace detail
template <> struct formatter<detail::bigint> {
FMT_CONSTEXPR format_parse_context::iterator parse(
format_parse_context& ctx) {
FMT_CONSTEXPR auto parse(format_parse_context& ctx)
-> format_parse_context::iterator {
return ctx.begin();
}
format_context::iterator format(const detail::bigint& n,
format_context& ctx) {
auto format(const detail::bigint& n, format_context& ctx) const
-> format_context::iterator {
auto out = ctx.out();
bool first = true;
for (auto i = n.bigits_.size(); i > 0; --i) {
@@ -2560,7 +1421,7 @@ FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) {
}
FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
const char* message) FMT_NOEXCEPT {
const char* message) noexcept {
FMT_TRY {
auto ec = std::error_code(error_code, std::generic_category());
write(std::back_inserter(out), std::system_error(ec, message).what());
@@ -2571,16 +1432,10 @@ FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
}
FMT_FUNC void report_system_error(int error_code,
const char* message) FMT_NOEXCEPT {
const char* message) noexcept {
report_error(format_system_error, error_code, message);
}
// DEPRECATED!
// This function is defined here and not inline for ABI compatiblity.
FMT_FUNC void detail::error_handler::on_error(const char* message) {
throw_format_error(message);
}
FMT_FUNC std::string vformat(string_view fmt, format_args args) {
// Don't optimize the "{}" case to keep the binary size small and because it
// can be better optimized in fmt::format anyway.
@@ -2589,54 +1444,237 @@ FMT_FUNC std::string vformat(string_view fmt, format_args args) {
return to_string(buffer);
}
#ifdef _WIN32
namespace detail {
#ifndef _WIN32
FMT_FUNC bool write_console(std::FILE*, string_view) { return false; }
#else
using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
extern "C" __declspec(dllimport) int __stdcall WriteConsoleW( //
void*, const void*, dword, dword*, void*);
} // namespace detail
#endif
namespace detail {
FMT_FUNC void print(std::FILE* f, string_view text) {
#ifdef _WIN32
FMT_FUNC bool write_console(std::FILE* f, string_view text) {
auto fd = _fileno(f);
if (_isatty(fd)) {
detail::utf8_to_utf16 u16(string_view(text.data(), text.size()));
auto written = detail::dword();
if (detail::WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)),
u16.c_str(), static_cast<uint32_t>(u16.size()),
&written, nullptr)) {
return;
}
// Fallback to fwrite on failure. It can happen if the output has been
// redirected to NUL.
}
#endif
detail::fwrite_fully(text.data(), 1, text.size(), f);
}
} // namespace detail
FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
memory_buffer buffer;
detail::vformat_to(buffer, format_str, args);
detail::print(f, {buffer.data(), buffer.size()});
if (!_isatty(fd)) return false;
auto u16 = utf8_to_utf16(text);
auto written = dword();
return WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)), u16.c_str(),
static_cast<uint32_t>(u16.size()), &written, nullptr);
}
#ifdef _WIN32
// Print assuming legacy (non-Unicode) encoding.
FMT_FUNC void detail::vprint_mojibake(std::FILE* f, string_view format_str,
format_args args) {
memory_buffer buffer;
detail::vformat_to(buffer, format_str,
FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) {
auto buffer = memory_buffer();
detail::vformat_to(buffer, fmt,
basic_format_args<buffer_context<char>>(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_FUNC void print(std::FILE* f, string_view text) {
if (!write_console(f, text)) fwrite_fully(text.data(), 1, text.size(), f);
}
} // namespace detail
FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
auto buffer = memory_buffer();
detail::vformat_to(buffer, fmt, args);
detail::print(f, {buffer.data(), buffer.size()});
}
FMT_FUNC void vprint(string_view fmt, format_args args) {
vprint(stdout, fmt, args);
}
namespace detail {
struct singleton {
unsigned char upper;
unsigned char lower_count;
};
inline auto is_printable(uint16_t x, const singleton* singletons,
size_t singletons_size,
const unsigned char* singleton_lowers,
const unsigned char* normal, size_t normal_size)
-> bool {
auto upper = x >> 8;
auto lower_start = 0;
for (size_t i = 0; i < singletons_size; ++i) {
auto s = singletons[i];
auto lower_end = lower_start + s.lower_count;
if (upper < s.upper) break;
if (upper == s.upper) {
for (auto j = lower_start; j < lower_end; ++j) {
if (singleton_lowers[j] == (x & 0xff)) return false;
}
}
lower_start = lower_end;
}
auto xsigned = static_cast<int>(x);
auto current = true;
for (size_t i = 0; i < normal_size; ++i) {
auto v = static_cast<int>(normal[i]);
auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v;
xsigned -= len;
if (xsigned < 0) break;
current = !current;
}
return current;
}
// This code is generated by support/printable.py.
FMT_FUNC auto is_printable(uint32_t cp) -> bool {
static constexpr singleton singletons0[] = {
{0x00, 1}, {0x03, 5}, {0x05, 6}, {0x06, 3}, {0x07, 6}, {0x08, 8},
{0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13},
{0x0f, 4}, {0x10, 3}, {0x12, 18}, {0x13, 9}, {0x16, 1}, {0x17, 5},
{0x18, 2}, {0x19, 3}, {0x1a, 7}, {0x1c, 2}, {0x1d, 1}, {0x1f, 22},
{0x20, 3}, {0x2b, 3}, {0x2c, 2}, {0x2d, 11}, {0x2e, 1}, {0x30, 3},
{0x31, 2}, {0x32, 1}, {0xa7, 2}, {0xa9, 2}, {0xaa, 4}, {0xab, 8},
{0xfa, 2}, {0xfb, 5}, {0xfd, 4}, {0xfe, 3}, {0xff, 9},
};
static constexpr unsigned char singletons0_lower[] = {
0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90,
0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f,
0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1,
0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04,
0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d,
0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf,
0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d,
0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d,
0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d,
0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5,
0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7,
0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49,
0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7,
0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7,
0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e,
0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16,
0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e,
0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f,
0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf,
0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0,
0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27,
0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91,
0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7,
0xfe, 0xff,
};
static constexpr singleton singletons1[] = {
{0x00, 6}, {0x01, 1}, {0x03, 1}, {0x04, 2}, {0x08, 8}, {0x09, 2},
{0x0a, 5}, {0x0b, 2}, {0x0e, 4}, {0x10, 1}, {0x11, 2}, {0x12, 5},
{0x13, 17}, {0x14, 1}, {0x15, 2}, {0x17, 2}, {0x19, 13}, {0x1c, 5},
{0x1d, 8}, {0x24, 1}, {0x6a, 3}, {0x6b, 2}, {0xbc, 2}, {0xd1, 2},
{0xd4, 12}, {0xd5, 9}, {0xd6, 2}, {0xd7, 2}, {0xda, 1}, {0xe0, 5},
{0xe1, 2}, {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2}, {0xf9, 2},
{0xfa, 2}, {0xfb, 1},
};
static constexpr unsigned char singletons1_lower[] = {
0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07,
0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36,
0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87,
0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b,
0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9,
0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66,
0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27,
0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc,
0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7,
0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6,
0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c,
0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66,
0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0,
0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93,
};
static constexpr unsigned char normal0[] = {
0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04,
0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0,
0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01,
0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03,
0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03,
0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a,
0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15,
0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f,
0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80,
0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07,
0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06,
0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04,
0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac,
0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c,
0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11,
0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c,
0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b,
0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6,
0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03,
0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80,
0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06,
0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c,
0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17,
0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80,
0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80,
0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d,
};
static constexpr unsigned char normal1[] = {
0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f,
0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e,
0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04,
0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09,
0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16,
0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f,
0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36,
0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33,
0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08,
0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e,
0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41,
0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03,
0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22,
0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04,
0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45,
0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03,
0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81,
0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75,
0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1,
0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a,
0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11,
0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09,
0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89,
0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6,
0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09,
0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50,
0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05,
0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83,
0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05,
0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80,
0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80,
0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07,
0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e,
0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07,
0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06,
};
auto lower = static_cast<uint16_t>(cp);
if (cp < 0x10000) {
return is_printable(lower, singletons0,
sizeof(singletons0) / sizeof(*singletons0),
singletons0_lower, normal0, sizeof(normal0));
}
if (cp < 0x20000) {
return is_printable(lower, singletons1,
sizeof(singletons1) / sizeof(*singletons1),
singletons1_lower, normal1, sizeof(normal1));
}
if (0x2a6de <= cp && cp < 0x2a700) return false;
if (0x2b735 <= cp && cp < 0x2b740) return false;
if (0x2b81e <= cp && cp < 0x2b820) return false;
if (0x2cea2 <= cp && cp < 0x2ceb0) return false;
if (0x2ebe1 <= cp && cp < 0x2f800) return false;
if (0x2fa1e <= cp && cp < 0x30000) return false;
if (0x3134b <= cp && cp < 0xe0100) return false;
if (0xe01f0 <= cp && cp < 0x110000) return false;
return cp < 0x110000;
}
} // namespace detail
FMT_END_NAMESPACE

3143
extern/fmtlib/include/fmt/format.h vendored
View File

@@ -1,45 +1,46 @@
/*
Formatting library for C++
Formatting library for C++
Copyright (c) 2012 - present, Victor Zverovich
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:
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 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.
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 ---
--- 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.
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 <cmath> // std::signbit
#include <cstdint> // uint32_t
#include <limits> // std::numeric_limits
#include <memory> // std::uninitialized_copy
#include <stdexcept> // std::runtime_error
#include <system_error> // std::system_error
#include <utility> // std::swap
#include <cmath> // std::signbit
#include <cstdint> // uint32_t
#include <cstring> // std::memcpy
#include <initializer_list> // std::initializer_list
#include <limits> // std::numeric_limits
#include <memory> // std::uninitialized_copy
#include <stdexcept> // std::runtime_error
#include <system_error> // std::system_error
#ifdef __cpp_lib_bit_cast
# include <bit> // std::bitcast
@@ -47,6 +48,36 @@
#include "core.h"
#ifndef FMT_BEGIN_DETAIL_NAMESPACE
# define FMT_BEGIN_DETAIL_NAMESPACE namespace detail {
# define FMT_END_DETAIL_NAMESPACE }
#endif
#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
# define FMT_FALLTHROUGH [[fallthrough]]
#elif defined(__clang__)
# define FMT_FALLTHROUGH [[clang::fallthrough]]
#elif FMT_GCC_VERSION >= 700 && \
(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
# define FMT_FALLTHROUGH [[gnu::fallthrough]]
#else
# define FMT_FALLTHROUGH
#endif
#ifndef FMT_DEPRECATED
# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900
# define FMT_DEPRECATED [[deprecated]]
# else
# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
# define FMT_DEPRECATED __attribute__((deprecated))
# elif FMT_MSC_VERSION
# define FMT_DEPRECATED __declspec(deprecated)
# else
# define FMT_DEPRECATED /* deprecated */
# endif
# endif
#endif
#if FMT_GCC_VERSION
# define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
#else
@@ -71,15 +102,9 @@
# define FMT_NOINLINE
#endif
#if FMT_MSC_VER
# define FMT_MSC_DEFAULT = default
#else
# define FMT_MSC_DEFAULT
#endif
#ifndef FMT_THROW
# if FMT_EXCEPTIONS
# if FMT_MSC_VER || FMT_NVCC
# if FMT_MSC_VERSION || defined(__NVCC__)
FMT_BEGIN_NAMESPACE
namespace detail {
template <typename Exception> inline void do_throw(const Exception& x) {
@@ -118,17 +143,10 @@ FMT_END_NAMESPACE
# endif
#endif
// Workaround broken [[deprecated]] in the Intel, PGI and NVCC compilers.
#if FMT_ICC_VERSION || defined(__PGI) || FMT_NVCC
# define FMT_DEPRECATED_ALIAS
#else
# define FMT_DEPRECATED_ALIAS FMT_DEPRECATED
#endif
#ifndef FMT_USE_USER_DEFINED_LITERALS
// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
FMT_MSC_VER >= 1900) && \
FMT_MSC_VERSION >= 1900) && \
(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
# define FMT_USE_USER_DEFINED_LITERALS 1
# else
@@ -146,7 +164,7 @@ FMT_END_NAMESPACE
// __builtin_clz is broken in clang with Microsoft CodeGen:
// https://github.com/fmtlib/fmt/issues/519.
#if !FMT_MSC_VER
#if !FMT_MSC_VERSION
# if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
# endif
@@ -158,22 +176,25 @@ FMT_END_NAMESPACE
// __builtin_ctz is broken in Intel Compiler Classic on Windows:
// https://github.com/fmtlib/fmt/issues/2510.
#ifndef __ICL
# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION
# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION || \
defined(__NVCOMPILER)
# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
# endif
# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || \
FMT_ICC_VERSION || defined(__NVCOMPILER)
# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
# endif
#endif
#if FMT_MSC_VER
#if FMT_MSC_VERSION
# include <intrin.h> // _BitScanReverse[64], _BitScanForward[64], _umul128
#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(FMT_BUILTIN_CTZLL)
#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL) && \
!defined(FMT_BUILTIN_CTZLL)
FMT_BEGIN_NAMESPACE
namespace detail {
// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
@@ -204,7 +225,8 @@ inline auto clzll(uint64_t x) -> int {
_BitScanReverse64(&r, x);
# else
// Scan the high 32 bits.
if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 ^ (r + 32);
if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
return 63 ^ static_cast<int>(r + 32);
// Scan the low 32 bits.
_BitScanReverse(&r, static_cast<uint32_t>(x));
# endif
@@ -243,15 +265,41 @@ inline auto ctzll(uint64_t x) -> int {
FMT_END_NAMESPACE
#endif
#ifdef FMT_HEADER_ONLY
# define FMT_HEADER_ONLY_CONSTEXPR20 FMT_CONSTEXPR20
#else
# define FMT_HEADER_ONLY_CONSTEXPR20
#endif
FMT_BEGIN_NAMESPACE
template <typename...> struct disjunction : std::false_type {};
template <typename P> struct disjunction<P> : P {};
template <typename P1, typename... Pn>
struct disjunction<P1, Pn...>
: conditional_t<bool(P1::value), P1, disjunction<Pn...>> {};
template <typename...> struct conjunction : std::true_type {};
template <typename P> struct conjunction<P> : P {};
template <typename P1, typename... Pn>
struct conjunction<P1, Pn...>
: conditional_t<bool(P1::value), conjunction<Pn...>, P1> {};
namespace detail {
FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) {
ignore_unused(condition);
#ifdef FMT_FUZZ
if (condition) throw std::runtime_error("fuzzing limit reached");
#endif
}
template <typename CharT, CharT... C> struct string_literal {
static constexpr CharT value[sizeof...(C)] = {C...};
constexpr operator basic_string_view<CharT>() const {
return {value, sizeof...(C)};
}
};
#if FMT_CPLUSPLUS < 201703L
template <typename CharT, CharT... C>
constexpr CharT string_literal<CharT, C...>::value[sizeof...(C)];
#endif
template <typename Streambuf> class formatbuf : public Streambuf {
private:
using char_type = typename Streambuf::char_type;
@@ -284,14 +332,14 @@ template <typename Streambuf> class formatbuf : public Streambuf {
};
// Implementation of std::bit_cast for pre-C++20.
template <typename To, typename From>
template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) == sizeof(From))>
FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
static_assert(sizeof(To) == sizeof(From), "size mismatch");
#ifdef __cpp_lib_bit_cast
if (is_constant_evaluated()) return std::bit_cast<To>(from);
#endif
auto to = To();
std::memcpy(&to, &from, sizeof(to));
// The cast suppresses a bogus -Wclass-memaccess on GCC.
std::memcpy(static_cast<void*>(&to), &from, sizeof(to));
return to;
}
@@ -310,29 +358,125 @@ inline auto is_big_endian() -> bool {
#endif
}
// A fallback implementation of uintptr_t for systems that lack it.
struct fallback_uintptr {
unsigned char value[sizeof(void*)];
class uint128_fallback {
private:
uint64_t lo_, hi_;
fallback_uintptr() = default;
explicit fallback_uintptr(const void* p) {
*this = bit_cast<fallback_uintptr>(p);
if (const_check(is_big_endian())) {
for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j)
std::swap(value[i], value[j]);
friend uint128_fallback umul128(uint64_t x, uint64_t y) noexcept;
public:
constexpr uint128_fallback(uint64_t hi, uint64_t lo) : lo_(lo), hi_(hi) {}
constexpr uint128_fallback(uint64_t value = 0) : lo_(value), hi_(0) {}
constexpr uint64_t high() const noexcept { return hi_; }
constexpr uint64_t low() const noexcept { return lo_; }
template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
constexpr explicit operator T() const {
return static_cast<T>(lo_);
}
friend constexpr auto operator==(const uint128_fallback& lhs,
const uint128_fallback& rhs) -> bool {
return lhs.hi_ == rhs.hi_ && lhs.lo_ == rhs.lo_;
}
friend constexpr auto operator!=(const uint128_fallback& lhs,
const uint128_fallback& rhs) -> bool {
return !(lhs == rhs);
}
friend constexpr auto operator>(const uint128_fallback& lhs,
const uint128_fallback& rhs) -> bool {
return lhs.hi_ != rhs.hi_ ? lhs.hi_ > rhs.hi_ : lhs.lo_ > rhs.lo_;
}
friend constexpr auto operator|(const uint128_fallback& lhs,
const uint128_fallback& rhs)
-> uint128_fallback {
return {lhs.hi_ | rhs.hi_, lhs.lo_ | rhs.lo_};
}
friend constexpr auto operator&(const uint128_fallback& lhs,
const uint128_fallback& rhs)
-> uint128_fallback {
return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
}
friend constexpr auto operator~(const uint128_fallback& n)
-> uint128_fallback {
return {~n.hi_, ~n.lo_};
}
friend auto operator+(const uint128_fallback& lhs,
const uint128_fallback& rhs) -> uint128_fallback {
auto result = uint128_fallback(lhs);
result += rhs;
return result;
}
friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
-> uint128_fallback {
FMT_ASSERT(lhs.hi_ == 0, "");
uint64_t hi = (lhs.lo_ >> 32) * rhs;
uint64_t lo = (lhs.lo_ & ~uint32_t()) * rhs;
uint64_t new_lo = (hi << 32) + lo;
return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo};
}
friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
-> uint128_fallback {
return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs};
}
FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback {
if (shift == 64) return {0, hi_};
if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64);
return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)};
}
FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback {
if (shift == 64) return {lo_, 0};
if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64);
return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)};
}
FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& {
return *this = *this >> shift;
}
FMT_CONSTEXPR void operator+=(uint128_fallback n) {
uint64_t new_lo = lo_ + n.lo_;
uint64_t new_hi = hi_ + n.hi_ + (new_lo < lo_ ? 1 : 0);
FMT_ASSERT(new_hi >= hi_, "");
lo_ = new_lo;
hi_ = new_hi;
}
FMT_CONSTEXPR void operator&=(uint128_fallback n) {
lo_ &= n.lo_;
hi_ &= n.hi_;
}
FMT_CONSTEXPR20 uint128_fallback& operator+=(uint64_t n) noexcept {
if (is_constant_evaluated()) {
lo_ += n;
hi_ += (lo_ < n ? 1 : 0);
return *this;
}
#if FMT_HAS_BUILTIN(__builtin_addcll) && !defined(__ibmxl__)
unsigned long long carry;
lo_ = __builtin_addcll(lo_, n, 0, &carry);
hi_ += carry;
#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !defined(__ibmxl__)
unsigned long long result;
auto carry = __builtin_ia32_addcarryx_u64(0, lo_, n, &result);
lo_ = result;
hi_ += carry;
#elif defined(_MSC_VER) && defined(_M_X64)
auto carry = _addcarry_u64(0, lo_, n, &lo_);
_addcarry_u64(carry, hi_, 0, &hi_);
#else
lo_ += n;
hi_ += (lo_ < n ? 1 : 0);
#endif
return *this;
}
};
using uint128_t = conditional_t<FMT_USE_INT128, uint128_opt, uint128_fallback>;
#ifdef UINTPTR_MAX
using uintptr_t = ::uintptr_t;
inline auto to_uintptr(const void* p) -> uintptr_t {
return bit_cast<uintptr_t>(p);
}
#else
using uintptr_t = fallback_uintptr;
inline auto to_uintptr(const void* p) -> fallback_uintptr {
return fallback_uintptr(p);
}
using uintptr_t = uint128_t;
#endif
// Returns the largest possible value for type T. Same as
@@ -344,16 +488,53 @@ template <typename T> constexpr auto num_bits() -> int {
return std::numeric_limits<T>::digits;
}
// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
template <> constexpr auto num_bits<int128_t>() -> int { return 128; }
template <> constexpr auto num_bits<int128_opt>() -> int { return 128; }
template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
template <> constexpr auto num_bits<fallback_uintptr>() -> int {
return static_cast<int>(sizeof(void*) *
std::numeric_limits<unsigned char>::digits);
// A heterogeneous bit_cast used for converting 96-bit long double to uint128_t
// and 128-bit pointers to uint128_fallback.
template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) > sizeof(From))>
inline auto bit_cast(const From& from) -> To {
constexpr auto size = static_cast<int>(sizeof(From) / sizeof(unsigned));
struct data_t {
unsigned value[static_cast<unsigned>(size)];
} data = bit_cast<data_t>(from);
auto result = To();
if (const_check(is_big_endian())) {
for (int i = 0; i < size; ++i)
result = (result << num_bits<unsigned>()) | data.value[i];
} else {
for (int i = size - 1; i >= 0; --i)
result = (result << num_bits<unsigned>()) | data.value[i];
}
return result;
}
template <typename UInt>
FMT_CONSTEXPR20 inline auto countl_zero_fallback(UInt n) -> int {
int lz = 0;
constexpr UInt msb_mask = static_cast<UInt>(1) << (num_bits<UInt>() - 1);
for (; (n & msb_mask) == 0; n <<= 1) lz++;
return lz;
}
FMT_CONSTEXPR20 inline auto countl_zero(uint32_t n) -> int {
#ifdef FMT_BUILTIN_CLZ
if (!is_constant_evaluated()) return FMT_BUILTIN_CLZ(n);
#endif
return countl_zero_fallback(n);
}
FMT_CONSTEXPR20 inline auto countl_zero(uint64_t n) -> int {
#ifdef FMT_BUILTIN_CLZLL
if (!is_constant_evaluated()) return FMT_BUILTIN_CLZLL(n);
#endif
return countl_zero_fallback(n);
}
FMT_INLINE void assume(bool condition) {
(void)condition;
#if FMT_HAS_BUILTIN(__builtin_assume)
#if FMT_HAS_BUILTIN(__builtin_assume) && !FMT_ICC_VERSION
__builtin_assume(condition);
#endif
}
@@ -495,19 +676,24 @@ FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
constexpr const int shiftc[] = {0, 18, 12, 6, 0};
constexpr const int shifte[] = {0, 6, 4, 2, 0};
int len = code_point_length(s);
const char* next = s + len;
int len = "\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"
[static_cast<unsigned char>(*s) >> 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 = s + len + !len;
using uchar = unsigned char;
// 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 = uint32_t(uchar(s[0]) & masks[len]) << 18;
*c |= uint32_t(uchar(s[1]) & 0x3f) << 12;
*c |= uint32_t(uchar(s[2]) & 0x3f) << 6;
*c |= uint32_t(uchar(s[3]) & 0x3f) << 0;
*c >>= shiftc[len];
// Accumulate the various error conditions.
using uchar = unsigned char;
*e = (*c < mins[len]) << 6; // non-canonical encoding
*e |= ((*c >> 11) == 0x1b) << 7; // surrogate half?
*e |= (*c > 0x10FFFF) << 8; // out of range?
@@ -520,7 +706,7 @@ FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
return next;
}
constexpr uint32_t invalid_code_point = ~uint32_t();
constexpr FMT_INLINE_VARIABLE uint32_t invalid_code_point = ~uint32_t();
// Invokes f(cp, sv) for every code point cp in s with sv being the string view
// corresponding to the code point. cp is invalid_code_point on error.
@@ -531,8 +717,8 @@ FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
auto error = 0;
auto end = utf8_decode(buf_ptr, &cp, &error);
bool result = f(error ? invalid_code_point : cp,
string_view(ptr, to_unsigned(end - buf_ptr)));
return result ? end : nullptr;
string_view(ptr, error ? 1 : to_unsigned(end - buf_ptr)));
return result ? (error ? buf_ptr + 1 : end) : nullptr;
};
auto p = s.data();
const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars.
@@ -590,13 +776,14 @@ FMT_CONSTEXPR inline size_t compute_width(string_view s) {
return true;
}
};
// We could avoid branches by using utf8_decode directly.
for_each_codepoint(s, count_code_points{&num_code_points});
return num_code_points;
}
inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
return compute_width(basic_string_view<char>(
reinterpret_cast<const char*>(s.data()), s.size()));
return compute_width(
string_view(reinterpret_cast<const char*>(s.data()), s.size()));
}
template <typename Char>
@@ -606,9 +793,8 @@ inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
}
// Calculates the index of the nth code point in a UTF-8 string.
inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
-> size_t {
const char8_type* data = s.data();
inline auto code_point_index(string_view s, size_t n) -> size_t {
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 > n) return i;
@@ -616,11 +802,73 @@ inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
return s.size();
}
inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
-> size_t {
return code_point_index(
string_view(reinterpret_cast<const char*>(s.data()), s.size()), n);
}
template <typename T> struct is_integral : std::is_integral<T> {};
template <> struct is_integral<int128_opt> : std::true_type {};
template <> struct is_integral<uint128_t> : std::true_type {};
template <typename T>
using is_signed =
std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
std::is_same<T, int128_opt>::value>;
template <typename T>
using is_integer =
bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
!std::is_same<T, char>::value &&
!std::is_same<T, wchar_t>::value>;
#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
#ifndef FMT_USE_FLOAT128
# ifdef __clang__
// Clang emulates GCC, so it has to appear early.
# if FMT_HAS_INCLUDE(<quadmath.h>)
# define FMT_USE_FLOAT128 1
# endif
# elif defined(__GNUC__)
// GNU C++:
# if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__)
# define FMT_USE_FLOAT128 1
# endif
# endif
# ifndef FMT_USE_FLOAT128
# define FMT_USE_FLOAT128 0
# endif
#endif
#if FMT_USE_FLOAT128
using float128 = __float128;
#else
using float128 = void;
#endif
template <typename T> using is_float128 = std::is_same<T, float128>;
template <typename T>
using is_floating_point =
bool_constant<std::is_floating_point<T>::value || is_float128<T>::value>;
template <typename T, bool = std::is_floating_point<T>::value>
struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
sizeof(T) <= sizeof(double)> {};
template <typename T> struct is_fast_float<T, false> : std::false_type {};
template <typename T>
using is_double_double = bool_constant<std::numeric_limits<T>::digits == 106>;
#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
# define FMT_USE_FULL_CACHE_DRAGONBOX 0
#endif
@@ -645,7 +893,7 @@ template <typename T>
struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
} // namespace detail
FMT_MODULE_EXPORT_BEGIN
FMT_BEGIN_EXPORT
// The number of characters to store in the basic_memory_buffer object itself
// to avoid dynamic memory allocation.
@@ -688,7 +936,27 @@ class basic_memory_buffer final : public detail::buffer<T> {
}
protected:
FMT_CONSTEXPR20 void grow(size_t size) override;
FMT_CONSTEXPR20 void grow(size_t size) override {
detail::abort_fuzzing_if(size > 5000);
const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
size_t old_capacity = this->capacity();
size_t new_capacity = old_capacity + old_capacity / 2;
if (size > new_capacity)
new_capacity = size;
else if (new_capacity > max_size)
new_capacity = size > max_size ? size : max_size;
T* old_data = this->data();
T* new_data =
std::allocator_traits<Allocator>::allocate(alloc_, 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(),
detail::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_) alloc_.deallocate(old_data, old_capacity);
}
public:
using value_type = T;
@@ -698,9 +966,7 @@ class basic_memory_buffer final : public detail::buffer<T> {
const Allocator& alloc = Allocator())
: alloc_(alloc) {
this->set(store_, SIZE);
if (detail::is_constant_evaluated()) {
detail::fill_n(store_, SIZE, T{});
}
if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T());
}
FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
@@ -712,18 +978,14 @@ class basic_memory_buffer final : public detail::buffer<T> {
size_t size = other.size(), capacity = other.capacity();
if (data == other.store_) {
this->set(store_, capacity);
if (detail::is_constant_evaluated()) {
detail::copy_str<T>(other.store_, other.store_ + size,
detail::make_checked(store_, capacity));
} else {
std::uninitialized_copy(other.store_, other.store_ + size,
detail::make_checked(store_, capacity));
}
detail::copy_str<T>(other.store_, other.store_ + size,
detail::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);
other.clear();
}
this->resize(size);
}
@@ -735,8 +997,7 @@ class basic_memory_buffer final : public detail::buffer<T> {
of the other object to it.
\endrst
*/
FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other)
FMT_NOEXCEPT {
FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept {
move(other);
}
@@ -745,8 +1006,7 @@ class basic_memory_buffer final : public detail::buffer<T> {
Moves the content of the other ``basic_memory_buffer`` object to this one.
\endrst
*/
auto operator=(basic_memory_buffer&& other) FMT_NOEXCEPT
-> basic_memory_buffer& {
auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
FMT_ASSERT(this != &other, "");
deallocate();
move(other);
@@ -773,86 +1033,38 @@ class basic_memory_buffer final : public detail::buffer<T> {
}
};
template <typename T, size_t SIZE, typename Allocator>
FMT_CONSTEXPR20 void basic_memory_buffer<T, SIZE, Allocator>::grow(
size_t size) {
#ifdef FMT_FUZZ
if (size > 5000) throw std::runtime_error("fuzz mode - won't grow that much");
#endif
const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
size_t old_capacity = this->capacity();
size_t new_capacity = old_capacity + old_capacity / 2;
if (size > new_capacity)
new_capacity = size;
else if (new_capacity > max_size)
new_capacity = size > max_size ? size : max_size;
T* old_data = this->data();
T* new_data =
std::allocator_traits<Allocator>::allocate(alloc_, 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(),
detail::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_) alloc_.deallocate(old_data, old_capacity);
}
using memory_buffer = basic_memory_buffer<char>;
template <typename T, size_t SIZE, typename Allocator>
struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
};
FMT_END_EXPORT
namespace detail {
FMT_API bool write_console(std::FILE* f, string_view text);
FMT_API void print(std::FILE*, string_view);
}
} // namespace detail
FMT_BEGIN_EXPORT
/** A formatting error such as invalid format string. */
FMT_CLASS_API
// Suppress a misleading warning in older versions of clang.
#if FMT_CLANG_VERSION
# pragma clang diagnostic ignored "-Wweak-vtables"
#endif
/** An error reported from a formatting function. */
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 override FMT_MSC_DEFAULT;
using std::runtime_error::runtime_error;
};
/**
\rst
Constructs a `~fmt::format_arg_store` object that contains references
to arguments and can be implicitly converted to `~fmt::format_args`.
If ``fmt`` is a compile-time string then `make_args_checked` checks
its validity at compile time.
\endrst
*/
template <typename... Args, typename S, typename Char = char_t<S>>
FMT_INLINE auto make_args_checked(const S& fmt,
const remove_reference_t<Args>&... args)
-> format_arg_store<buffer_context<Char>, remove_reference_t<Args>...> {
static_assert(
detail::count<(
std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
std::is_reference<Args>::value)...>() == 0,
"passing views as lvalues is disallowed");
detail::check_format_string<Args...>(fmt);
return {args...};
}
// compile-time support
namespace detail_exported {
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
#if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <typename Char, size_t N> struct fixed_string {
constexpr fixed_string(const Char (&str)[N]) {
detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
str + N, data);
}
Char data[N]{};
Char data[N] = {};
};
#endif
@@ -871,33 +1083,70 @@ constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
}
} // namespace detail_exported
class loc_value {
private:
basic_format_arg<format_context> value_;
public:
template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
loc_value(T value) : value_(detail::make_arg<format_context>(value)) {}
template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
loc_value(T) {}
template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
return visit_format_arg(vis, value_);
}
};
// A locale facet that formats values in UTF-8.
// It is parameterized on the locale to avoid the heavy <locale> include.
template <typename Locale> class format_facet : public Locale::facet {
private:
std::string separator_;
std::string grouping_;
std::string decimal_point_;
protected:
virtual auto do_put(appender out, loc_value val,
const format_specs<>& specs) const -> bool;
public:
static FMT_API typename Locale::id id;
explicit format_facet(Locale& loc);
explicit format_facet(string_view sep = "",
std::initializer_list<unsigned char> g = {3},
std::string decimal_point = ".")
: separator_(sep.data(), sep.size()),
grouping_(g.begin(), g.end()),
decimal_point_(decimal_point) {}
auto put(appender out, loc_value val, const format_specs<>& specs) const
-> bool {
return do_put(out, val, specs);
}
};
FMT_BEGIN_DETAIL_NAMESPACE
template <typename T> struct is_integral : std::is_integral<T> {};
template <> struct is_integral<int128_t> : std::true_type {};
template <> struct is_integral<uint128_t> : std::true_type {};
template <typename T>
using is_signed =
std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
std::is_same<T, int128_t>::value>;
// Returns true if value is negative, false otherwise.
// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
FMT_CONSTEXPR auto is_negative(T value) -> bool {
constexpr auto is_negative(T value) -> bool {
return value < 0;
}
template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
FMT_CONSTEXPR auto is_negative(T) -> bool {
constexpr auto is_negative(T) -> bool {
return false;
}
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
FMT_CONSTEXPR auto is_supported_floating_point(T) -> uint16_t {
return (std::is_same<T, float>::value && FMT_USE_FLOAT) ||
(std::is_same<T, double>::value && FMT_USE_DOUBLE) ||
(std::is_same<T, long double>::value && FMT_USE_LONG_DOUBLE);
template <typename T>
FMT_CONSTEXPR auto is_supported_floating_point(T) -> bool {
if (std::is_same<T, float>()) return FMT_USE_FLOAT;
if (std::is_same<T, double>()) return FMT_USE_DOUBLE;
if (std::is_same<T, long double>()) return FMT_USE_LONG_DOUBLE;
return true;
}
// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
@@ -948,7 +1197,7 @@ template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
}
}
#if FMT_USE_INT128
FMT_CONSTEXPR inline auto count_digits(uint128_t n) -> int {
FMT_CONSTEXPR inline auto count_digits(uint128_opt n) -> int {
return count_digits_fallback(n);
}
#endif
@@ -989,7 +1238,7 @@ FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
template <int BITS, typename UInt>
FMT_CONSTEXPR auto count_digits(UInt n) -> int {
#ifdef FMT_BUILTIN_CLZ
if (num_bits<UInt>() == 32)
if (!is_constant_evaluated() && num_bits<UInt>() == 32)
return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
#endif
// Lambda avoids unreachable code warnings from NVHPC.
@@ -1002,8 +1251,6 @@ FMT_CONSTEXPR auto count_digits(UInt n) -> int {
}(n);
}
template <> auto count_digits<4>(detail::fallback_uintptr n) -> int;
#ifdef FMT_BUILTIN_CLZ
// It is a separate function rather than a part of count_digits to workaround
// the lack of static constexpr in constexpr functions.
@@ -1039,15 +1286,11 @@ FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
return count_digits_fallback(n);
}
template <typename Int> constexpr auto digits10() FMT_NOEXCEPT -> int {
template <typename Int> constexpr auto digits10() noexcept -> int {
return std::numeric_limits<Int>::digits10;
}
template <> constexpr auto digits10<int128_t>() FMT_NOEXCEPT -> int {
return 38;
}
template <> constexpr auto digits10<uint128_t>() FMT_NOEXCEPT -> int {
return 38;
}
template <> constexpr auto digits10<int128_opt>() noexcept -> int { return 38; }
template <> constexpr auto digits10<uint128_t>() noexcept -> int { return 38; }
template <typename Char> struct thousands_sep_result {
std::string grouping;
@@ -1127,10 +1370,10 @@ FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
template <typename Char, typename UInt, typename Iterator,
FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
inline auto format_decimal(Iterator out, UInt value, int size)
FMT_CONSTEXPR inline auto format_decimal(Iterator out, UInt value, int size)
-> format_decimal_result<Iterator> {
// Buffer is large enough to hold all digits (digits10 + 1).
Char buffer[digits10<UInt>() + 1];
Char buffer[digits10<UInt>() + 1] = {};
auto end = format_decimal(buffer, value, size).end;
return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
}
@@ -1142,35 +1385,13 @@ FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
Char* end = buffer;
do {
const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
unsigned digit = (value & ((1 << BASE_BITS) - 1));
unsigned digit = static_cast<unsigned>(value & ((1 << BASE_BITS) - 1));
*--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
: digits[digit]);
} while ((value >>= BASE_BITS) != 0);
return end;
}
template <unsigned BASE_BITS, typename Char>
auto format_uint(Char* buffer, detail::fallback_uintptr n, int num_digits,
bool = false) -> Char* {
auto char_digits = std::numeric_limits<unsigned char>::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<BASE_BITS>(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<Char>("0123456789abcdef"[digit]);
value >>= BASE_BITS;
}
}
return buffer;
}
template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
inline auto format_uint(It out, UInt value, int num_digits, bool upper = false)
-> It {
@@ -1197,61 +1418,174 @@ class utf8_to_utf16 {
auto str() const -> std::wstring { return {&buffer_[0], size()}; }
};
// A converter from UTF-16/UTF-32 (host endian) to UTF-8.
template <typename WChar, typename Buffer = memory_buffer>
class unicode_to_utf8 {
private:
Buffer buffer_;
public:
unicode_to_utf8() {}
explicit unicode_to_utf8(basic_string_view<WChar> s) {
static_assert(sizeof(WChar) == 2 || sizeof(WChar) == 4,
"Expect utf16 or utf32");
if (!convert(s))
FMT_THROW(std::runtime_error(sizeof(WChar) == 2 ? "invalid utf16"
: "invalid utf32"));
}
operator string_view() const { return string_view(&buffer_[0], size()); }
size_t size() const { return buffer_.size() - 1; }
const char* c_str() const { return &buffer_[0]; }
std::string str() const { return std::string(&buffer_[0], size()); }
// Performs conversion returning a bool instead of throwing exception on
// conversion error. This method may still throw in case of memory allocation
// error.
bool convert(basic_string_view<WChar> s) {
if (!convert(buffer_, s)) return false;
buffer_.push_back(0);
return true;
}
static bool convert(Buffer& buf, basic_string_view<WChar> s) {
for (auto p = s.begin(); p != s.end(); ++p) {
uint32_t c = static_cast<uint32_t>(*p);
if (sizeof(WChar) == 2 && c >= 0xd800 && c <= 0xdfff) {
// surrogate pair
++p;
if (p == s.end() || (c & 0xfc00) != 0xd800 || (*p & 0xfc00) != 0xdc00) {
return false;
}
c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
}
if (c < 0x80) {
buf.push_back(static_cast<char>(c));
} else if (c < 0x800) {
buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
} else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
buf.push_back(static_cast<char>(0xe0 | (c >> 12)));
buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
} else if (c >= 0x10000 && c <= 0x10ffff) {
buf.push_back(static_cast<char>(0xf0 | (c >> 18)));
buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
} else {
return false;
}
}
return true;
}
};
// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
inline uint128_fallback umul128(uint64_t x, uint64_t y) noexcept {
#if FMT_USE_INT128
auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
return {static_cast<uint64_t>(p >> 64), static_cast<uint64_t>(p)};
#elif defined(_MSC_VER) && defined(_M_X64)
auto result = uint128_fallback();
result.lo_ = _umul128(x, y, &result.hi_);
return result;
#else
const uint64_t mask = static_cast<uint64_t>(max_value<uint32_t>());
uint64_t a = x >> 32;
uint64_t b = x & mask;
uint64_t c = y >> 32;
uint64_t d = y & mask;
uint64_t ac = a * c;
uint64_t bc = b * c;
uint64_t ad = a * d;
uint64_t bd = b * d;
uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
(intermediate << 32) + (bd & mask)};
#endif
}
namespace dragonbox {
// Computes floor(log10(pow(2, e))) for e in [-2620, 2620] using the method from
// https://fmt.dev/papers/Dragonbox.pdf#page=28, section 6.1.
inline int floor_log10_pow2(int e) noexcept {
FMT_ASSERT(e <= 2620 && e >= -2620, "too large exponent");
static_assert((-1 >> 1) == -1, "right shift is not arithmetic");
return (e * 315653) >> 20;
}
inline int floor_log2_pow10(int e) noexcept {
FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
return (e * 1741647) >> 19;
}
// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
inline uint64_t umul128_upper64(uint64_t x, uint64_t y) noexcept {
#if FMT_USE_INT128
auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
return static_cast<uint64_t>(p >> 64);
#elif defined(_MSC_VER) && defined(_M_X64)
return __umulh(x, y);
#else
return umul128(x, y).high();
#endif
}
// Computes upper 128 bits of multiplication of a 64-bit unsigned integer and a
// 128-bit unsigned integer.
inline uint128_fallback umul192_upper128(uint64_t x,
uint128_fallback y) noexcept {
uint128_fallback r = umul128(x, y.high());
r += umul128_upper64(x, y.low());
return r;
}
FMT_API uint128_fallback get_cached_power(int k) noexcept;
// Type-specific information that Dragonbox uses.
template <class T> struct float_info;
template <typename T, typename Enable = void> struct float_info;
template <> struct float_info<float> {
using carrier_uint = uint32_t;
static const int significand_bits = 23;
static const int exponent_bits = 8;
static const int min_exponent = -126;
static const int max_exponent = 127;
static const int exponent_bias = -127;
static const int decimal_digits = 9;
static const int kappa = 1;
static const int big_divisor = 100;
static const int small_divisor = 10;
static const int min_k = -31;
static const int max_k = 46;
static const int cache_bits = 64;
static const int divisibility_check_by_5_threshold = 39;
static const int case_fc_pm_half_lower_threshold = -1;
static const int case_fc_pm_half_upper_threshold = 6;
static const int case_fc_lower_threshold = -2;
static const int case_fc_upper_threshold = 6;
static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
static const int shorter_interval_tie_lower_threshold = -35;
static const int shorter_interval_tie_upper_threshold = -35;
static const int max_trailing_zeros = 7;
};
template <> struct float_info<double> {
using carrier_uint = uint64_t;
static const int significand_bits = 52;
static const int exponent_bits = 11;
static const int min_exponent = -1022;
static const int max_exponent = 1023;
static const int exponent_bias = -1023;
static const int decimal_digits = 17;
static const int kappa = 2;
static const int big_divisor = 1000;
static const int small_divisor = 100;
static const int min_k = -292;
static const int max_k = 326;
static const int cache_bits = 128;
static const int divisibility_check_by_5_threshold = 86;
static const int case_fc_pm_half_lower_threshold = -2;
static const int case_fc_pm_half_upper_threshold = 9;
static const int case_fc_lower_threshold = -4;
static const int case_fc_upper_threshold = 9;
static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
static const int max_k = 341;
static const int shorter_interval_tie_lower_threshold = -77;
static const int shorter_interval_tie_upper_threshold = -77;
static const int max_trailing_zeros = 16;
};
// An 80- or 128-bit floating point number.
template <typename T>
struct float_info<T, enable_if_t<std::numeric_limits<T>::digits == 64 ||
std::numeric_limits<T>::digits == 113 ||
is_float128<T>::value>> {
using carrier_uint = detail::uint128_t;
static const int exponent_bits = 15;
};
// A double-double floating point number.
template <typename T>
struct float_info<T, enable_if_t<is_double_double<T>::value>> {
using carrier_uint = detail::uint128_t;
};
template <typename T> struct decimal_fp {
@@ -1260,16 +1594,35 @@ template <typename T> struct decimal_fp {
int exponent;
};
template <typename T>
FMT_API auto to_decimal(T x) FMT_NOEXCEPT -> decimal_fp<T>;
template <typename T> FMT_API auto to_decimal(T x) noexcept -> decimal_fp<T>;
} // namespace dragonbox
template <typename T>
// Returns true iff Float has the implicit bit which is not stored.
template <typename Float> constexpr bool has_implicit_bit() {
// An 80-bit FP number has a 64-bit significand an no implicit bit.
return std::numeric_limits<Float>::digits != 64;
}
// Returns the number of significand bits stored in Float. The implicit bit is
// not counted since it is not stored.
template <typename Float> constexpr int num_significand_bits() {
// std::numeric_limits may not support __float128.
return is_float128<Float>() ? 112
: (std::numeric_limits<Float>::digits -
(has_implicit_bit<Float>() ? 1 : 0));
}
template <typename Float>
constexpr auto exponent_mask() ->
typename dragonbox::float_info<T>::carrier_uint {
using uint = typename dragonbox::float_info<T>::carrier_uint;
return ((uint(1) << dragonbox::float_info<T>::exponent_bits) - 1)
<< dragonbox::float_info<T>::significand_bits;
typename dragonbox::float_info<Float>::carrier_uint {
using float_uint = typename dragonbox::float_info<Float>::carrier_uint;
return ((float_uint(1) << dragonbox::float_info<Float>::exponent_bits) - 1)
<< num_significand_bits<Float>();
}
template <typename Float> constexpr auto exponent_bias() -> int {
// std::numeric_limits may not support __float128.
return is_float128<Float>() ? 16383
: std::numeric_limits<Float>::max_exponent - 1;
}
// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
@@ -1294,21 +1647,213 @@ FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
return it;
}
template <typename T>
FMT_HEADER_ONLY_CONSTEXPR20 auto format_float(T value, int precision,
float_specs specs,
buffer<char>& buf) -> int;
// A floating-point number f * pow(2, e) where F is an unsigned type.
template <typename F> struct basic_fp {
F f;
int e;
// Formats a floating-point number with snprintf.
template <typename T>
auto snprintf_float(T value, int precision, float_specs specs,
buffer<char>& buf) -> int;
static constexpr const int num_significand_bits =
static_cast<int>(sizeof(F) * num_bits<unsigned char>());
template <typename T> constexpr auto promote_float(T value) -> T {
constexpr basic_fp() : f(0), e(0) {}
constexpr basic_fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
// Constructs fp from an IEEE754 floating-point number.
template <typename Float> FMT_CONSTEXPR basic_fp(Float n) { assign(n); }
// Assigns n to this and return true iff predecessor is closer than successor.
template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
FMT_CONSTEXPR auto assign(Float n) -> bool {
static_assert(std::numeric_limits<Float>::digits <= 113, "unsupported FP");
// Assume Float is in the format [sign][exponent][significand].
using carrier_uint = typename dragonbox::float_info<Float>::carrier_uint;
const auto num_float_significand_bits =
detail::num_significand_bits<Float>();
const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
const auto significand_mask = implicit_bit - 1;
auto u = bit_cast<carrier_uint>(n);
f = static_cast<F>(u & significand_mask);
auto biased_e = static_cast<int>((u & exponent_mask<Float>()) >>
num_float_significand_bits);
// The predecessor is closer if n is a normalized power of 2 (f == 0)
// other than the smallest normalized number (biased_e > 1).
auto is_predecessor_closer = f == 0 && biased_e > 1;
if (biased_e == 0)
biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
else if (has_implicit_bit<Float>())
f += static_cast<F>(implicit_bit);
e = biased_e - exponent_bias<Float>() - num_float_significand_bits;
if (!has_implicit_bit<Float>()) ++e;
return is_predecessor_closer;
}
template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
FMT_CONSTEXPR auto assign(Float n) -> bool {
static_assert(std::numeric_limits<double>::is_iec559, "unsupported FP");
return assign(static_cast<double>(n));
}
};
using fp = basic_fp<unsigned long long>;
// Normalizes the value converted from double and multiplied by (1 << SHIFT).
template <int SHIFT = 0, typename F>
FMT_CONSTEXPR basic_fp<F> normalize(basic_fp<F> value) {
// Handle subnormals.
const auto implicit_bit = F(1) << num_significand_bits<double>();
const auto shifted_implicit_bit = 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 = basic_fp<F>::num_significand_bits -
num_significand_bits<double>() - SHIFT - 1;
value.f <<= offset;
value.e -= offset;
return value;
}
constexpr auto promote_float(float value) -> double {
return static_cast<double>(value);
// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
FMT_CONSTEXPR 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<uint64_t>(product >> 64);
return (static_cast<uint64_t>(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
}
FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
return {multiply(x.f, y.f), x.e + y.e + 64};
}
template <typename T = void> struct basic_data {
// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
// These are generated by support/compute-powers.py.
static constexpr uint64_t pow10_significands[87] = {
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,
};
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnarrowing"
#endif
// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
// to significands above.
static constexpr int16_t pow10_exponents[87] = {
-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};
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
# pragma GCC diagnostic pop
#endif
static constexpr uint64_t power_of_10_64[20] = {
1, FMT_POWERS_OF_10(1ULL), FMT_POWERS_OF_10(1000000000ULL),
10000000000000000000ULL};
// For checking rounding thresholds.
// The kth entry is chosen to be the smallest integer such that the
// upper 32-bits of 10^(k+1) times it is strictly bigger than 5 * 10^k.
static constexpr uint32_t fractional_part_rounding_thresholds[8] = {
2576980378, // ceil(2^31 + 2^32/10^1)
2190433321, // ceil(2^31 + 2^32/10^2)
2151778616, // ceil(2^31 + 2^32/10^3)
2147913145, // ceil(2^31 + 2^32/10^4)
2147526598, // ceil(2^31 + 2^32/10^5)
2147487943, // ceil(2^31 + 2^32/10^6)
2147484078, // ceil(2^31 + 2^32/10^7)
2147483691 // ceil(2^31 + 2^32/10^8)
};
};
#if FMT_CPLUSPLUS < 201703L
template <typename T> constexpr uint64_t basic_data<T>::pow10_significands[];
template <typename T> constexpr int16_t basic_data<T>::pow10_exponents[];
template <typename T> constexpr uint64_t basic_data<T>::power_of_10_64[];
template <typename T>
constexpr uint32_t basic_data<T>::fractional_part_rounding_thresholds[];
#endif
// This is a struct rather than an alias to avoid shadowing warnings in gcc.
struct data : basic_data<> {};
// 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`.
FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
int& pow10_exponent) {
const int shift = 32;
// log10(2) = 0x0.4d104d427de7fbcc...
const int64_t significand = 0x4d104d427de7fbcc;
int index = static_cast<int>(
((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
((int64_t(1) << shift) - 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;
// Using *(x + index) instead of x[index] avoids an issue with some compilers
// using the EDG frontend (e.g. nvhpc/22.3 in C++17 mode).
return {*(data::pow10_significands + index),
*(data::pow10_exponents + index)};
}
template <typename T>
using convert_float_result =
conditional_t<std::is_same<T, float>::value ||
std::numeric_limits<T>::digits ==
std::numeric_limits<double>::digits,
double, T>;
template <typename T>
constexpr auto convert_float(T value) -> convert_float_result<T> {
return static_cast<convert_float_result<T>>(value);
}
template <typename OutputIt, typename Char>
@@ -1327,8 +1872,7 @@ FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
// width: output display width in (terminal) column positions.
template <align::type align = align::left, typename OutputIt, typename Char,
typename F>
FMT_CONSTEXPR auto write_padded(OutputIt out,
const basic_format_specs<Char>& specs,
FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs<Char>& specs,
size_t size, size_t width, F&& f) -> OutputIt {
static_assert(align == align::left || align == align::right, "");
unsigned spec_width = to_unsigned(specs.width);
@@ -1347,15 +1891,14 @@ FMT_CONSTEXPR auto write_padded(OutputIt out,
template <align::type align = align::left, typename OutputIt, typename Char,
typename F>
constexpr auto write_padded(OutputIt out, const basic_format_specs<Char>& specs,
constexpr auto write_padded(OutputIt out, const format_specs<Char>& specs,
size_t size, F&& f) -> OutputIt {
return write_padded<align>(out, specs, size, size, f);
}
template <align::type align = align::left, typename Char, typename OutputIt>
FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
const basic_format_specs<Char>& specs)
-> OutputIt {
const format_specs<Char>& specs) -> OutputIt {
return write_padded<align>(
out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
const char* data = bytes.data();
@@ -1364,8 +1907,8 @@ FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
}
template <typename Char, typename OutputIt, typename UIntPtr>
auto write_ptr(OutputIt out, UIntPtr value,
const basic_format_specs<Char>* specs) -> OutputIt {
auto write_ptr(OutputIt out, UIntPtr value, const format_specs<Char>* specs)
-> OutputIt {
int num_digits = count_digits<4>(value);
auto size = to_unsigned(num_digits) + size_t(2);
auto write = [=](reserve_iterator<OutputIt> it) {
@@ -1377,22 +1920,183 @@ auto write_ptr(OutputIt out, UIntPtr value,
: base_iterator(out, write(reserve(out, size)));
}
// Returns true iff the code point cp is printable.
FMT_API auto is_printable(uint32_t cp) -> bool;
inline auto needs_escape(uint32_t cp) -> bool {
return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
!is_printable(cp);
}
template <typename Char> struct find_escape_result {
const Char* begin;
const Char* end;
uint32_t cp;
};
template <typename Char>
using make_unsigned_char =
typename conditional_t<std::is_integral<Char>::value,
std::make_unsigned<Char>,
type_identity<uint32_t>>::type;
template <typename Char>
auto find_escape(const Char* begin, const Char* end)
-> find_escape_result<Char> {
for (; begin != end; ++begin) {
uint32_t cp = static_cast<make_unsigned_char<Char>>(*begin);
if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue;
if (needs_escape(cp)) return {begin, begin + 1, cp};
}
return {begin, nullptr, 0};
}
inline auto find_escape(const char* begin, const char* end)
-> find_escape_result<char> {
if (!is_utf8()) return find_escape<char>(begin, end);
auto result = find_escape_result<char>{end, nullptr, 0};
for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
[&](uint32_t cp, string_view sv) {
if (needs_escape(cp)) {
result = {sv.begin(), sv.end(), cp};
return false;
}
return true;
});
return result;
}
#define FMT_STRING_IMPL(s, base, explicit) \
[] { \
/* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
/* Use a macro-like name to avoid shadowing warnings. */ \
struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base { \
using char_type FMT_MAYBE_UNUSED = fmt::remove_cvref_t<decltype(s[0])>; \
FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \
operator fmt::basic_string_view<char_type>() const { \
return fmt::detail_exported::compile_string_to_view<char_type>(s); \
} \
}; \
return FMT_COMPILE_STRING(); \
}()
/**
\rst
Constructs a compile-time format string from a string literal *s*.
**Example**::
// A compile-time error because 'd' is an invalid specifier for strings.
std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
\endrst
*/
#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, )
template <size_t width, typename Char, typename OutputIt>
auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt {
*out++ = static_cast<Char>('\\');
*out++ = static_cast<Char>(prefix);
Char buf[width];
fill_n(buf, width, static_cast<Char>('0'));
format_uint<4>(buf, cp, width);
return copy_str<Char>(buf, buf + width, out);
}
template <typename OutputIt, typename Char>
auto write_escaped_cp(OutputIt out, const find_escape_result<Char>& escape)
-> OutputIt {
auto c = static_cast<Char>(escape.cp);
switch (escape.cp) {
case '\n':
*out++ = static_cast<Char>('\\');
c = static_cast<Char>('n');
break;
case '\r':
*out++ = static_cast<Char>('\\');
c = static_cast<Char>('r');
break;
case '\t':
*out++ = static_cast<Char>('\\');
c = static_cast<Char>('t');
break;
case '"':
FMT_FALLTHROUGH;
case '\'':
FMT_FALLTHROUGH;
case '\\':
*out++ = static_cast<Char>('\\');
break;
default:
if (escape.cp < 0x100) {
return write_codepoint<2, Char>(out, 'x', escape.cp);
}
if (escape.cp < 0x10000) {
return write_codepoint<4, Char>(out, 'u', escape.cp);
}
if (escape.cp < 0x110000) {
return write_codepoint<8, Char>(out, 'U', escape.cp);
}
for (Char escape_char : basic_string_view<Char>(
escape.begin, to_unsigned(escape.end - escape.begin))) {
out = write_codepoint<2, Char>(out, 'x',
static_cast<uint32_t>(escape_char) & 0xFF);
}
return out;
}
*out++ = c;
return out;
}
template <typename Char, typename OutputIt>
auto write_escaped_string(OutputIt out, basic_string_view<Char> str)
-> OutputIt {
*out++ = static_cast<Char>('"');
auto begin = str.begin(), end = str.end();
do {
auto escape = find_escape(begin, end);
out = copy_str<Char>(begin, escape.begin, out);
begin = escape.end;
if (!begin) break;
out = write_escaped_cp<OutputIt, Char>(out, escape);
} while (begin != end);
*out++ = static_cast<Char>('"');
return out;
}
template <typename Char, typename OutputIt>
auto write_escaped_char(OutputIt out, Char v) -> OutputIt {
*out++ = static_cast<Char>('\'');
if ((needs_escape(static_cast<uint32_t>(v)) && v != static_cast<Char>('"')) ||
v == static_cast<Char>('\'')) {
out = write_escaped_cp(
out, find_escape_result<Char>{&v, &v + 1, static_cast<uint32_t>(v)});
} else {
*out++ = v;
}
*out++ = static_cast<Char>('\'');
return out;
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
const basic_format_specs<Char>& specs)
-> OutputIt {
const format_specs<Char>& specs) -> OutputIt {
bool is_debug = specs.type == presentation_type::debug;
return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
if (is_debug) return write_escaped_char(it, value);
*it++ = value;
return it;
});
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, Char value,
const basic_format_specs<Char>& specs,
locale_ref loc = {}) -> OutputIt {
const format_specs<Char>& specs, locale_ref loc = {})
-> OutputIt {
// char is formatted as unsigned char for consistency across platforms.
using unsigned_type =
conditional_t<std::is_same<Char, char>::value, unsigned char, unsigned>;
return check_char_specs(specs)
? write_char(out, value, specs)
: write(out, static_cast<int>(value), specs, loc);
: write(out, static_cast<unsigned_type>(value), specs, loc);
}
// Data for write_int that doesn't depend on output iterator type. It is used to
@@ -1402,7 +2106,7 @@ template <typename Char> struct write_int_data {
size_t padding;
FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
const basic_format_specs<Char>& specs)
const format_specs<Char>& specs)
: size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
if (specs.align == align::numeric) {
auto width = to_unsigned(specs.width);
@@ -1424,7 +2128,7 @@ template <typename Char> struct write_int_data {
template <typename OutputIt, typename Char, typename W>
FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
unsigned prefix,
const basic_format_specs<Char>& specs,
const format_specs<Char>& specs,
W write_digits) -> OutputIt {
// Slightly faster check for specs.width == 0 && specs.precision == -1.
if ((specs.width | (specs.precision + 1)) == 0) {
@@ -1447,19 +2151,19 @@ FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
template <typename Char> class digit_grouping {
private:
thousands_sep_result<Char> sep_;
std::string grouping_;
std::basic_string<Char> thousands_sep_;
struct next_state {
std::string::const_iterator group;
int pos;
};
next_state initial_state() const { return {sep_.grouping.begin(), 0}; }
next_state initial_state() const { return {grouping_.begin(), 0}; }
// Returns the next digit group separator position.
int next(next_state& state) const {
if (!sep_.thousands_sep) return max_value<int>();
if (state.group == sep_.grouping.end())
return state.pos += sep_.grouping.back();
if (thousands_sep_.empty()) return max_value<int>();
if (state.group == grouping_.end()) return state.pos += grouping_.back();
if (*state.group <= 0 || *state.group == max_value<char>())
return max_value<int>();
state.pos += *state.group++;
@@ -1468,14 +2172,15 @@ template <typename Char> class digit_grouping {
public:
explicit digit_grouping(locale_ref loc, bool localized = true) {
if (localized)
sep_ = thousands_sep<Char>(loc);
else
sep_.thousands_sep = Char();
if (!localized) return;
auto sep = thousands_sep<Char>(loc);
grouping_ = sep.grouping;
if (sep.thousands_sep) thousands_sep_.assign(1, sep.thousands_sep);
}
explicit digit_grouping(thousands_sep_result<Char> sep) : sep_(sep) {}
digit_grouping(std::string grouping, std::basic_string<Char> sep)
: grouping_(std::move(grouping)), thousands_sep_(std::move(sep)) {}
Char separator() const { return sep_.thousands_sep; }
bool has_separator() const { return !thousands_sep_.empty(); }
int count_separators(int num_digits) const {
int count = 0;
@@ -1498,7 +2203,9 @@ template <typename Char> class digit_grouping {
for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
i < num_digits; ++i) {
if (num_digits - i == separators[sep_index]) {
*out++ = separator();
out =
copy_str<Char>(thousands_sep_.data(),
thousands_sep_.data() + thousands_sep_.size(), out);
--sep_index;
}
*out++ = static_cast<Char>(digits[to_unsigned(i)]);
@@ -1507,10 +2214,11 @@ template <typename Char> class digit_grouping {
}
};
// Writes a decimal integer with digit grouping.
template <typename OutputIt, typename UInt, typename Char>
auto write_int_localized(OutputIt out, UInt value, unsigned prefix,
const basic_format_specs<Char>& specs,
const digit_grouping<Char>& grouping) -> OutputIt {
auto write_int(OutputIt out, UInt value, unsigned prefix,
const format_specs<Char>& specs,
const digit_grouping<Char>& grouping) -> OutputIt {
static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
int num_digits = count_digits(value);
char digits[40];
@@ -1519,18 +2227,21 @@ auto write_int_localized(OutputIt out, UInt value, unsigned prefix,
grouping.count_separators(num_digits));
return write_padded<align::right>(
out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
if (prefix != 0) *it++ = static_cast<Char>(prefix);
if (prefix != 0) {
char sign = static_cast<char>(prefix);
*it++ = static_cast<Char>(sign);
}
return grouping.apply(it, string_view(digits, to_unsigned(num_digits)));
});
}
template <typename OutputIt, typename UInt, typename Char>
auto write_int_localized(OutputIt& out, UInt value, unsigned prefix,
const basic_format_specs<Char>& specs, locale_ref loc)
-> bool {
auto grouping = digit_grouping<Char>(loc);
out = write_int_localized(out, value, prefix, specs, grouping);
return true;
// Writes a localized value.
FMT_API auto write_loc(appender out, loc_value value,
const format_specs<>& specs, locale_ref loc) -> bool;
template <typename OutputIt, typename Char>
inline auto write_loc(OutputIt, loc_value, const format_specs<Char>&,
locale_ref) -> bool {
return false;
}
FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
@@ -1559,21 +2270,37 @@ FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
return {abs_value, prefix};
}
template <typename Char = char> struct loc_writer {
buffer_appender<Char> out;
const format_specs<Char>& specs;
std::basic_string<Char> sep;
std::string grouping;
std::basic_string<Char> decimal_point;
template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
auto operator()(T value) -> bool {
auto arg = make_write_int_arg(value, specs.sign);
write_int(out, static_cast<uint64_or_128_t<T>>(arg.abs_value), arg.prefix,
specs, digit_grouping<Char>(grouping, sep));
return true;
}
template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
auto operator()(T) -> bool {
return false;
}
};
template <typename Char, typename OutputIt, typename T>
FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
const basic_format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
const format_specs<Char>& specs,
locale_ref) -> OutputIt {
static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
auto abs_value = arg.abs_value;
auto prefix = arg.prefix;
switch (specs.type) {
case presentation_type::none:
case presentation_type::dec: {
if (specs.localized &&
write_int_localized(out, static_cast<uint64_or_128_t<T>>(abs_value),
prefix, specs, loc)) {
return out;
}
auto num_digits = count_digits(abs_value);
return write_int(
out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
@@ -1616,13 +2343,13 @@ FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
case presentation_type::chr:
return write_char(out, static_cast<Char>(abs_value), specs);
default:
throw_format_error("invalid type specifier");
throw_format_error("invalid format specifier");
}
return out;
}
template <typename Char, typename OutputIt, typename T>
FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
OutputIt out, write_int_arg<T> arg, const basic_format_specs<Char>& specs,
OutputIt out, write_int_arg<T> arg, const format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
return write_int(out, arg, specs, loc);
}
@@ -1631,8 +2358,9 @@ template <typename Char, typename OutputIt, typename T,
!std::is_same<T, bool>::value &&
std::is_same<OutputIt, buffer_appender<Char>>::value)>
FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
const basic_format_specs<Char>& specs,
const format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
if (specs.localized && write_loc(out, value, specs, loc)) return out;
return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
loc);
}
@@ -1642,48 +2370,179 @@ template <typename Char, typename OutputIt, typename T,
!std::is_same<T, bool>::value &&
!std::is_same<OutputIt, buffer_appender<Char>>::value)>
FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
const basic_format_specs<Char>& specs,
const format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
if (specs.localized && write_loc(out, value, specs, loc)) return out;
return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
}
// An output iterator that counts the number of objects written to it and
// discards them.
class counting_iterator {
private:
size_t count_;
public:
using iterator_category = std::output_iterator_tag;
using difference_type = std::ptrdiff_t;
using pointer = void;
using reference = void;
FMT_UNCHECKED_ITERATOR(counting_iterator);
struct value_type {
template <typename T> FMT_CONSTEXPR void operator=(const T&) {}
};
FMT_CONSTEXPR counting_iterator() : count_(0) {}
FMT_CONSTEXPR size_t count() const { return count_; }
FMT_CONSTEXPR counting_iterator& operator++() {
++count_;
return *this;
}
FMT_CONSTEXPR counting_iterator operator++(int) {
auto it = *this;
++*this;
return it;
}
FMT_CONSTEXPR friend counting_iterator operator+(counting_iterator it,
difference_type n) {
it.count_ += static_cast<size_t>(n);
return it;
}
FMT_CONSTEXPR value_type operator*() const { return {}; }
};
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
const basic_format_specs<Char>& specs) -> OutputIt {
const format_specs<Char>& specs) -> OutputIt {
auto data = s.data();
auto size = s.size();
if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
size = code_point_index(s, to_unsigned(specs.precision));
auto width =
specs.width != 0 ? compute_width(basic_string_view<Char>(data, size)) : 0;
bool is_debug = specs.type == presentation_type::debug;
size_t width = 0;
if (specs.width != 0) {
if (is_debug)
width = write_escaped_string(counting_iterator{}, s).count();
else
width = compute_width(basic_string_view<Char>(data, size));
}
return write_padded(out, specs, size, width,
[=](reserve_iterator<OutputIt> it) {
if (is_debug) return write_escaped_string(it, s);
return copy_str<Char>(data, data + size, it);
});
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out,
basic_string_view<type_identity_t<Char>> s,
const basic_format_specs<Char>& specs, locale_ref)
const format_specs<Char>& specs, locale_ref)
-> OutputIt {
check_string_type_spec(specs.type);
return write(out, s, specs);
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
const basic_format_specs<Char>& specs, locale_ref)
const format_specs<Char>& specs, locale_ref)
-> OutputIt {
return check_cstring_type_spec(specs.type)
return specs.type != presentation_type::pointer
? write(out, basic_string_view<Char>(s), specs, {})
: write_ptr<Char>(out, to_uintptr(s), &specs);
: write_ptr<Char>(out, bit_cast<uintptr_t>(s), &specs);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_integral<T>::value &&
!std::is_same<T, bool>::value &&
!std::is_same<T, Char>::value)>
FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(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 size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
auto it = reserve(out, size);
if (auto ptr = to_pointer<Char>(it, size)) {
if (negative) *ptr++ = static_cast<Char>('-');
format_decimal<Char>(ptr, abs_value, num_digits);
return out;
}
if (negative) *it++ = static_cast<Char>('-');
it = format_decimal<Char>(it, abs_value, num_digits).end;
return base_iterator(out, it);
}
// 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 binary32 : 1;
bool showpoint : 1;
};
template <typename ErrorHandler = error_handler, typename Char>
FMT_CONSTEXPR auto parse_float_type_spec(const format_specs<Char>& specs,
ErrorHandler&& eh = {})
-> float_specs {
auto result = float_specs();
result.showpoint = specs.alt;
result.locale = specs.localized;
switch (specs.type) {
case presentation_type::none:
result.format = float_format::general;
break;
case presentation_type::general_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::general_lower:
result.format = float_format::general;
break;
case presentation_type::exp_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::exp_lower:
result.format = float_format::exp;
result.showpoint |= specs.precision != 0;
break;
case presentation_type::fixed_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::fixed_lower:
result.format = float_format::fixed;
result.showpoint |= specs.precision != 0;
break;
case presentation_type::hexfloat_upper:
result.upper = true;
FMT_FALLTHROUGH;
case presentation_type::hexfloat_lower:
result.format = float_format::hex;
break;
default:
eh.on_error("invalid format specifier");
break;
}
return result;
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isinf,
basic_format_specs<Char> specs,
FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan,
format_specs<Char> specs,
const float_specs& fspecs) -> OutputIt {
auto str =
isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
isnan ? (fspecs.upper ? "NAN" : "nan") : (fspecs.upper ? "INF" : "inf");
constexpr size_t str_size = 3;
auto sign = fspecs.sign;
auto size = str_size + (sign ? 1 : 0);
@@ -1704,12 +2563,12 @@ struct big_decimal_fp {
int exponent;
};
constexpr auto get_significand_size(const big_decimal_fp& fp) -> int {
return fp.significand_size;
constexpr auto get_significand_size(const big_decimal_fp& f) -> int {
return f.significand_size;
}
template <typename T>
inline auto get_significand_size(const dragonbox::decimal_fp<T>& fp) -> int {
return count_digits(fp.significand);
inline auto get_significand_size(const dragonbox::decimal_fp<T>& f) -> int {
return count_digits(f.significand);
}
template <typename Char, typename OutputIt>
@@ -1726,7 +2585,7 @@ template <typename Char, typename OutputIt, typename T, typename Grouping>
FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
int significand_size, int exponent,
const Grouping& grouping) -> OutputIt {
if (!grouping.separator()) {
if (!grouping.has_separator()) {
out = write_significand<Char>(out, significand, significand_size);
return detail::fill_n(out, exponent, static_cast<Char>('0'));
}
@@ -1747,7 +2606,7 @@ inline auto write_significand(Char* out, UInt significand, int significand_size,
int floating_size = significand_size - integral_size;
for (int i = floating_size / 2; i > 0; --i) {
out -= 2;
copy2(out, digits2(significand % 100));
copy2(out, digits2(static_cast<std::size_t>(significand % 100)));
significand /= 100;
}
if (floating_size % 2 != 0) {
@@ -1788,7 +2647,7 @@ FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
int significand_size, int integral_size,
Char decimal_point,
const Grouping& grouping) -> OutputIt {
if (!grouping.separator()) {
if (!grouping.has_separator()) {
return write_significand(out, significand, significand_size, integral_size,
decimal_point);
}
@@ -1803,13 +2662,13 @@ FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
template <typename OutputIt, typename DecimalFP, typename Char,
typename Grouping = digit_grouping<Char>>
FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
const basic_format_specs<Char>& specs,
FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& f,
const format_specs<Char>& specs,
float_specs fspecs, locale_ref loc)
-> OutputIt {
auto significand = fp.significand;
int significand_size = get_significand_size(fp);
constexpr Char zero = static_cast<Char>('0');
auto significand = f.significand;
int significand_size = get_significand_size(f);
const Char zero = static_cast<Char>('0');
auto sign = fspecs.sign;
size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
using iterator = reserve_iterator<OutputIt>;
@@ -1817,7 +2676,7 @@ FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
Char decimal_point =
fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
int output_exp = fp.exponent + significand_size - 1;
int output_exp = f.exponent + significand_size - 1;
auto use_exp_format = [=]() {
if (fspecs.format == float_format::exp) return true;
if (fspecs.format != float_format::general) return false;
@@ -1855,25 +2714,23 @@ FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
: base_iterator(out, write(reserve(out, size)));
}
int exp = fp.exponent + significand_size;
if (fp.exponent >= 0) {
int exp = f.exponent + significand_size;
if (f.exponent >= 0) {
// 1234e5 -> 123400000[.0+]
size += to_unsigned(fp.exponent);
size += to_unsigned(f.exponent);
int num_zeros = fspecs.precision - exp;
#ifdef FMT_FUZZ
if (num_zeros > 5000)
throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
#endif
abort_fuzzing_if(num_zeros > 5000);
if (fspecs.showpoint) {
if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 1;
if (num_zeros > 0) size += to_unsigned(num_zeros) + 1;
++size;
if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 0;
if (num_zeros > 0) size += to_unsigned(num_zeros);
}
auto grouping = Grouping(loc, fspecs.locale);
size += to_unsigned(grouping.count_separators(significand_size));
size += to_unsigned(grouping.count_separators(exp));
return write_padded<align::right>(out, specs, size, [&](iterator it) {
if (sign) *it++ = detail::sign<Char>(sign);
it = write_significand<Char>(it, significand, significand_size,
fp.exponent, grouping);
f.exponent, grouping);
if (!fspecs.showpoint) return it;
*it++ = decimal_point;
return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
@@ -1883,7 +2740,7 @@ FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
auto grouping = Grouping(loc, fspecs.locale);
size += to_unsigned(grouping.count_separators(significand_size));
size += to_unsigned(grouping.count_separators(exp));
return write_padded<align::right>(out, specs, size, [&](iterator it) {
if (sign) *it++ = detail::sign<Char>(sign);
it = write_significand(it, significand, significand_size, exp,
@@ -1913,7 +2770,7 @@ template <typename Char> class fallback_digit_grouping {
public:
constexpr fallback_digit_grouping(locale_ref, bool) {}
constexpr Char separator() const { return Char(); }
constexpr bool has_separator() const { return false; }
constexpr int count_separators(int) const { return 0; }
@@ -1924,67 +2781,1044 @@ template <typename Char> class fallback_digit_grouping {
};
template <typename OutputIt, typename DecimalFP, typename Char>
FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& fp,
const basic_format_specs<Char>& specs,
FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& f,
const format_specs<Char>& specs,
float_specs fspecs, locale_ref loc)
-> OutputIt {
if (is_constant_evaluated()) {
return do_write_float<OutputIt, DecimalFP, Char,
fallback_digit_grouping<Char>>(out, fp, specs, fspecs,
fallback_digit_grouping<Char>>(out, f, specs, fspecs,
loc);
} else {
return do_write_float(out, fp, specs, fspecs, loc);
return do_write_float(out, f, specs, fspecs, loc);
}
}
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
FMT_CONSTEXPR20 bool isinf(T value) {
if (is_constant_evaluated()) {
#if defined(__cpp_if_constexpr)
if constexpr (std::numeric_limits<double>::is_iec559) {
auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
constexpr auto significand_bits =
dragonbox::float_info<double>::significand_bits;
return (bits & exponent_mask<double>()) &&
!(bits & ((uint64_t(1) << significand_bits) - 1));
}
#endif
}
return std::isinf(value);
template <typename T> constexpr bool isnan(T value) {
return !(value >= value); // std::isnan doesn't support __float128.
}
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
template <typename T, typename Enable = void>
struct has_isfinite : std::false_type {};
template <typename T>
struct has_isfinite<T, enable_if_t<sizeof(std::isfinite(T())) != 0>>
: std::true_type {};
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value&&
has_isfinite<T>::value)>
FMT_CONSTEXPR20 bool isfinite(T value) {
if (is_constant_evaluated()) {
#if defined(__cpp_if_constexpr)
if constexpr (std::numeric_limits<double>::is_iec559) {
auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
return (bits & exponent_mask<double>()) != exponent_mask<double>();
}
#endif
}
constexpr T inf = T(std::numeric_limits<double>::infinity());
if (is_constant_evaluated())
return !detail::isnan(value) && value < inf && value > -inf;
return std::isfinite(value);
}
template <typename T, FMT_ENABLE_IF(!has_isfinite<T>::value)>
FMT_CONSTEXPR bool isfinite(T value) {
T inf = T(std::numeric_limits<double>::infinity());
// std::isfinite doesn't support __float128.
return !detail::isnan(value) && value < inf && value > -inf;
}
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
template <typename T, FMT_ENABLE_IF(is_floating_point<T>::value)>
FMT_INLINE FMT_CONSTEXPR bool signbit(T value) {
if (is_constant_evaluated()) {
#ifdef __cpp_if_constexpr
if constexpr (std::numeric_limits<double>::is_iec559) {
auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
return (bits & (uint64_t(1) << (num_bits<uint64_t>() - 1))) != 0;
return (bits >> (num_bits<uint64_t>() - 1)) != 0;
}
#endif
}
return std::signbit(value);
return std::signbit(static_cast<double>(value));
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_floating_point<T>::value)>
FMT_CONSTEXPR20 auto write(OutputIt out, T value,
basic_format_specs<Char> specs, locale_ref loc = {})
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.
FMT_CONSTEXPR 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.
};
}
struct gen_digits_handler {
char* buf;
int size;
int precision;
int exp10;
bool fixed;
FMT_CONSTEXPR digits::result on_digit(char digit, uint64_t divisor,
uint64_t remainder, uint64_t error,
bool integral) {
FMT_ASSERT(remainder < divisor, "");
buf[size++] = digit;
if (!integral && error >= remainder) return digits::error;
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';
if (fixed)
buf[size++] = '0';
else
++exp10;
}
return digits::done;
}
};
inline FMT_CONSTEXPR20 void adjust_precision(int& precision, int exp10) {
// Adjust fixed precision by exponent because it is relative to decimal
// point.
if (exp10 > 0 && precision > max_value<int>() - exp10)
FMT_THROW(format_error("number is too big"));
precision += exp10;
}
// 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).
FMT_INLINE FMT_CONSTEXPR20 auto grisu_gen_digits(fp value, uint64_t error,
int& exp,
gen_digits_handler& handler)
-> digits::result {
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<uint32_t>(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 = count_digits(integral); // kappa in Grisu.
// Non-fixed formats require at least one digit and no precision adjustment.
if (handler.fixed) {
adjust_precision(handler.precision, exp + handler.exp10);
// Check if precision is satisfied just by leading zeros, e.g.
// format("{:.2f}", 0.001) gives "0.00" without generating any digits.
if (handler.precision <= 0) {
if (handler.precision < 0) return digits::done;
// Divide by 10 to prevent overflow.
uint64_t divisor = data::power_of_10_64[exp - 1] << -one.e;
auto dir = get_round_direction(divisor, value.f / 10, error * 10);
if (dir == round_direction::unknown) return digits::error;
handler.buf[handler.size++] = dir == round_direction::up ? '1' : '0';
return digits::done;
}
}
// 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;
auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
auto result = handler.on_digit(static_cast<char>('0' + digit),
data::power_of_10_64[exp] << -one.e,
remainder, error, 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<char>('0' + (fractional >> -one.e));
fractional &= one.f - 1;
--exp;
auto result = handler.on_digit(digit, one.f, fractional, error, false);
if (result != digits::more) return result;
}
}
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<bigit, bigits_capacity> bigits_;
int exp_;
FMT_CONSTEXPR20 bigit operator[](int index) const {
return bigits_[to_unsigned(index)];
}
FMT_CONSTEXPR20 bigit& operator[](int index) {
return bigits_[to_unsigned(index)];
}
static constexpr const int bigit_bits = num_bits<bigit>();
friend struct formatter<bigint>;
FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
(*this)[index] = static_cast<bigit>(result);
borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
}
FMT_CONSTEXPR20 void remove_leading_zeros() {
int num_bigits = static_cast<int>(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.
FMT_CONSTEXPR20 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();
}
FMT_CONSTEXPR20 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<bigit>(result);
carry = static_cast<bigit>(result >> bigit_bits);
}
if (carry != 0) bigits_.push_back(carry);
}
template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
std::is_same<UInt, uint128_t>::value)>
FMT_CONSTEXPR20 void multiply(UInt value) {
using half_uint =
conditional_t<std::is_same<UInt, uint128_t>::value, uint64_t, uint32_t>;
const int shift = num_bits<half_uint>() - bigit_bits;
const UInt lower = static_cast<half_uint>(value);
const UInt upper = value >> num_bits<half_uint>();
UInt carry = 0;
for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
UInt result = lower * bigits_[i] + static_cast<bigit>(carry);
carry = (upper * bigits_[i] << shift) + (result >> bigit_bits) +
(carry >> bigit_bits);
bigits_[i] = static_cast<bigit>(result);
}
while (carry != 0) {
bigits_.push_back(static_cast<bigit>(carry));
carry >>= bigit_bits;
}
}
template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
std::is_same<UInt, uint128_t>::value)>
FMT_CONSTEXPR20 void assign(UInt n) {
size_t num_bigits = 0;
do {
bigits_[num_bigits++] = static_cast<bigit>(n);
n >>= bigit_bits;
} while (n != 0);
bigits_.resize(num_bigits);
exp_ = 0;
}
public:
FMT_CONSTEXPR20 bigint() : exp_(0) {}
explicit bigint(uint64_t n) { assign(n); }
bigint(const bigint&) = delete;
void operator=(const bigint&) = delete;
FMT_CONSTEXPR20 void assign(const bigint& other) {
auto size = other.bigits_.size();
bigits_.resize(size);
auto data = other.bigits_.data();
std::copy(data, data + size, make_checked(bigits_.data(), size));
exp_ = other.exp_;
}
template <typename Int> FMT_CONSTEXPR20 void operator=(Int n) {
FMT_ASSERT(n > 0, "");
assign(uint64_or_128_t<Int>(n));
}
FMT_CONSTEXPR20 int num_bigits() const {
return static_cast<int>(bigits_.size()) + exp_;
}
FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
FMT_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 <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
FMT_ASSERT(value > 0, "");
multiply(uint32_or_64_or_128_t<Int>(value));
return *this;
}
friend FMT_CONSTEXPR20 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<int>(lhs.bigits_.size()) - 1;
int j = static_cast<int>(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 FMT_CONSTEXPR20 int add_compare(const bigint& lhs1, const bigint& lhs2,
const bigint& rhs) {
auto minimum = [](int a, int b) { return a < b ? a : b; };
auto maximum = [](int a, int b) { return a > b ? a : b; };
int max_lhs_bigits = maximum(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 = minimum(minimum(lhs1.exp_, lhs2.exp_), rhs.exp_);
for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
double_bigit sum =
static_cast<double_bigit>(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.
FMT_CONSTEXPR20 void assign_pow10(int exp) {
FMT_ASSERT(exp >= 0, "");
if (exp == 0) return *this = 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.
*this = 5;
bitmask >>= 1;
while (bitmask != 0) {
square();
if ((exp & bitmask) != 0) *this *= 5;
bitmask >>= 1;
}
*this <<= exp; // Multiply by pow(2, exp) by shifting.
}
FMT_CONSTEXPR20 void square() {
int num_bigits = static_cast<int>(bigits_.size());
int num_result_bigits = 2 * num_bigits;
basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
bigits_.resize(to_unsigned(num_result_bigits));
auto sum = uint128_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<double_bigit>(n[i]) * n[j];
}
(*this)[bigit_index] = static_cast<bigit>(sum);
sum >>= num_bits<bigit>(); // 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<double_bigit>(n[i++]) * n[j--];
(*this)[bigit_index] = static_cast<bigit>(sum);
sum >>= num_bits<bigit>();
}
remove_leading_zeros();
exp_ *= 2;
}
// If this bigint has a bigger exponent than other, adds trailing zero to make
// exponents equal. This simplifies some operations such as subtraction.
FMT_CONSTEXPR20 void align(const bigint& other) {
int exp_difference = exp_ - other.exp_;
if (exp_difference <= 0) return;
int num_bigits = static_cast<int>(bigits_.size());
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;
}
// Divides this bignum by divisor, assigning the remainder to this and
// returning the quotient.
FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
FMT_ASSERT(this != &divisor, "");
if (compare(*this, divisor) < 0) return 0;
FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
align(divisor);
int quotient = 0;
do {
subtract_aligned(divisor);
++quotient;
} while (compare(*this, divisor) >= 0);
return quotient;
}
};
// format_dragon flags.
enum dragon {
predecessor_closer = 1,
fixup = 2, // Run fixup to correct exp10 which can be off by one.
fixed = 4,
};
// Formats a floating-point number using a variation of the Fixed-Precision
// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
// https://fmt.dev/papers/p372-steele.pdf.
FMT_CONSTEXPR20 inline void format_dragon(basic_fp<uint128_t> value,
unsigned flags, int num_digits,
buffer<char>& 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).
// 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.
bool is_predecessor_closer = (flags & dragon::predecessor_closer) != 0;
int shift = is_predecessor_closer ? 2 : 1;
if (value.e >= 0) {
numerator = value.f;
numerator <<= value.e + shift;
lower = 1;
lower <<= value.e;
if (is_predecessor_closer) {
upper_store = 1;
upper_store <<= value.e + 1;
upper = &upper_store;
}
denominator.assign_pow10(exp10);
denominator <<= shift;
} else if (exp10 < 0) {
numerator.assign_pow10(-exp10);
lower.assign(numerator);
if (is_predecessor_closer) {
upper_store.assign(numerator);
upper_store <<= 1;
upper = &upper_store;
}
numerator *= value.f;
numerator <<= shift;
denominator = 1;
denominator <<= shift - value.e;
} else {
numerator = value.f;
numerator <<= shift;
denominator.assign_pow10(exp10);
denominator <<= shift - value.e;
lower = 1;
if (is_predecessor_closer) {
upper_store = 1ULL << 1;
upper = &upper_store;
}
}
int even = static_cast<int>((value.f & 1) == 0);
if (!upper) upper = &lower;
if ((flags & dragon::fixup) != 0) {
if (add_compare(numerator, *upper, denominator) + even <= 0) {
--exp10;
numerator *= 10;
if (num_digits < 0) {
lower *= 10;
if (upper != &lower) *upper *= 10;
}
}
if ((flags & dragon::fixed) != 0) adjust_precision(num_digits, exp10 + 1);
}
// Invariant: value == (numerator / denominator) * pow(10, exp10).
if (num_digits < 0) {
// Generate the shortest representation.
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<char>('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.try_resize(to_unsigned(num_digits));
exp10 -= num_digits - 1;
return;
}
numerator *= 10;
lower *= 10;
if (upper != &lower) *upper *= 10;
}
}
// Generate the given number of digits.
exp10 -= num_digits - 1;
if (num_digits == 0) {
denominator *= 10;
auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
buf.push_back(digit);
return;
}
buf.try_resize(to_unsigned(num_digits));
for (int i = 0; i < num_digits - 1; ++i) {
int digit = numerator.divmod_assign(denominator);
buf[i] = static_cast<char>('0' + digit);
numerator *= 10;
}
int digit = numerator.divmod_assign(denominator);
auto result = add_compare(numerator, numerator, denominator);
if (result > 0 || (result == 0 && (digit % 2) != 0)) {
if (digit == 9) {
const auto overflow = '0' + 10;
buf[num_digits - 1] = overflow;
// Propagate the carry.
for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
buf[i] = '0';
++buf[i - 1];
}
if (buf[0] == overflow) {
buf[0] = '1';
++exp10;
}
return;
}
++digit;
}
buf[num_digits - 1] = static_cast<char>('0' + digit);
}
// Formats a floating-point number using the hexfloat format.
template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
float_specs specs, buffer<char>& buf) {
// float is passed as double to reduce the number of instantiations and to
// simplify implementation.
static_assert(!std::is_same<Float, float>::value, "");
using info = dragonbox::float_info<Float>;
// Assume Float is in the format [sign][exponent][significand].
using carrier_uint = typename info::carrier_uint;
constexpr auto num_float_significand_bits =
detail::num_significand_bits<Float>();
basic_fp<carrier_uint> f(value);
f.e += num_float_significand_bits;
if (!has_implicit_bit<Float>()) --f.e;
constexpr auto num_fraction_bits =
num_float_significand_bits + (has_implicit_bit<Float>() ? 1 : 0);
constexpr auto num_xdigits = (num_fraction_bits + 3) / 4;
constexpr auto leading_shift = ((num_xdigits - 1) * 4);
const auto leading_mask = carrier_uint(0xF) << leading_shift;
const auto leading_xdigit =
static_cast<uint32_t>((f.f & leading_mask) >> leading_shift);
if (leading_xdigit > 1) f.e -= (32 - countl_zero(leading_xdigit) - 1);
int print_xdigits = num_xdigits - 1;
if (precision >= 0 && print_xdigits > precision) {
const int shift = ((print_xdigits - precision - 1) * 4);
const auto mask = carrier_uint(0xF) << shift;
const auto v = static_cast<uint32_t>((f.f & mask) >> shift);
if (v >= 8) {
const auto inc = carrier_uint(1) << (shift + 4);
f.f += inc;
f.f &= ~(inc - 1);
}
// Check long double overflow
if (!has_implicit_bit<Float>()) {
const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
if ((f.f & implicit_bit) == implicit_bit) {
f.f >>= 4;
f.e += 4;
}
}
print_xdigits = precision;
}
char xdigits[num_bits<carrier_uint>() / 4];
detail::fill_n(xdigits, sizeof(xdigits), '0');
format_uint<4>(xdigits, f.f, num_xdigits, specs.upper);
// Remove zero tail
while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits;
buf.push_back('0');
buf.push_back(specs.upper ? 'X' : 'x');
buf.push_back(xdigits[0]);
if (specs.showpoint || print_xdigits > 0 || print_xdigits < precision)
buf.push_back('.');
buf.append(xdigits + 1, xdigits + 1 + print_xdigits);
for (; print_xdigits < precision; ++print_xdigits) buf.push_back('0');
buf.push_back(specs.upper ? 'P' : 'p');
uint32_t abs_e;
if (f.e < 0) {
buf.push_back('-');
abs_e = static_cast<uint32_t>(-f.e);
} else {
buf.push_back('+');
abs_e = static_cast<uint32_t>(f.e);
}
format_decimal<char>(appender(buf), abs_e, detail::count_digits(abs_e));
}
template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
float_specs specs, buffer<char>& buf) {
format_hexfloat(static_cast<double>(value), precision, specs, buf);
}
template <typename Float>
FMT_CONSTEXPR20 auto format_float(Float value, int precision, float_specs specs,
buffer<char>& buf) -> int {
// float is passed as double to reduce the number of instantiations.
static_assert(!std::is_same<Float, float>::value, "");
FMT_ASSERT(value >= 0, "value is negative");
auto converted_value = convert_float(value);
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.try_resize(to_unsigned(precision));
fill_n(buf.data(), precision, '0');
return -precision;
}
int exp = 0;
bool use_dragon = true;
unsigned dragon_flags = 0;
if (!is_fast_float<Float>()) {
const auto inv_log2_10 = 0.3010299956639812; // 1 / log2(10)
using info = dragonbox::float_info<decltype(converted_value)>;
const auto f = basic_fp<typename info::carrier_uint>(converted_value);
// Compute exp, an approximate power of 10, such that
// 10^(exp - 1) <= value < 10^exp or 10^exp <= value < 10^(exp + 1).
// This is based on log10(value) == log2(value) / log2(10) and approximation
// of log2(value) by e + num_fraction_bits idea from double-conversion.
exp = static_cast<int>(
std::ceil((f.e + count_digits<1>(f.f) - 1) * inv_log2_10 - 1e-10));
dragon_flags = dragon::fixup;
} else if (!is_constant_evaluated() && precision < 0) {
// Use Dragonbox for the shortest format.
if (specs.binary32) {
auto dec = dragonbox::to_decimal(static_cast<float>(value));
write<char>(buffer_appender<char>(buf), dec.significand);
return dec.exponent;
}
auto dec = dragonbox::to_decimal(static_cast<double>(value));
write<char>(buffer_appender<char>(buf), dec.significand);
return dec.exponent;
} else if (is_constant_evaluated()) {
// Use Grisu + Dragon4 for the given precision:
// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
const int min_exp = -60; // alpha in Grisu.
int cached_exp10 = 0; // K in Grisu.
fp normalized = normalize(fp(converted_value));
const auto cached_pow = get_cached_power(
min_exp - (normalized.e + fp::num_significand_bits), cached_exp10);
normalized = normalized * cached_pow;
gen_digits_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
if (grisu_gen_digits(normalized, 1, exp, handler) != digits::error &&
!is_constant_evaluated()) {
exp += handler.exp10;
buf.try_resize(to_unsigned(handler.size));
use_dragon = false;
} else {
exp += handler.size - cached_exp10 - 1;
precision = handler.precision;
}
} else {
// Extract significand bits and exponent bits.
using info = dragonbox::float_info<double>;
auto br = bit_cast<uint64_t>(static_cast<double>(value));
const uint64_t significand_mask =
(static_cast<uint64_t>(1) << num_significand_bits<double>()) - 1;
uint64_t significand = (br & significand_mask);
int exponent = static_cast<int>((br & exponent_mask<double>()) >>
num_significand_bits<double>());
if (exponent != 0) { // Check if normal.
exponent -= exponent_bias<double>() + num_significand_bits<double>();
significand |=
(static_cast<uint64_t>(1) << num_significand_bits<double>());
significand <<= 1;
} else {
// Normalize subnormal inputs.
FMT_ASSERT(significand != 0, "zeros should not appear hear");
int shift = countl_zero(significand);
FMT_ASSERT(shift >= num_bits<uint64_t>() - num_significand_bits<double>(),
"");
shift -= (num_bits<uint64_t>() - num_significand_bits<double>() - 2);
exponent = (std::numeric_limits<double>::min_exponent -
num_significand_bits<double>()) -
shift;
significand <<= shift;
}
// Compute the first several nonzero decimal significand digits.
// We call the number we get the first segment.
const int k = info::kappa - dragonbox::floor_log10_pow2(exponent);
exp = -k;
const int beta = exponent + dragonbox::floor_log2_pow10(k);
uint64_t first_segment;
bool has_more_segments;
int digits_in_the_first_segment;
{
const auto r = dragonbox::umul192_upper128(
significand << beta, dragonbox::get_cached_power(k));
first_segment = r.high();
has_more_segments = r.low() != 0;
// The first segment can have 18 ~ 19 digits.
if (first_segment >= 1000000000000000000ULL) {
digits_in_the_first_segment = 19;
} else {
// When it is of 18-digits, we align it to 19-digits by adding a bogus
// zero at the end.
digits_in_the_first_segment = 18;
first_segment *= 10;
}
}
// Compute the actual number of decimal digits to print.
if (fixed) {
adjust_precision(precision, exp + digits_in_the_first_segment);
}
// Use Dragon4 only when there might be not enough digits in the first
// segment.
if (digits_in_the_first_segment > precision) {
use_dragon = false;
if (precision <= 0) {
exp += digits_in_the_first_segment;
if (precision < 0) {
// Nothing to do, since all we have are just leading zeros.
buf.try_resize(0);
} else {
// We may need to round-up.
buf.try_resize(1);
if ((first_segment | static_cast<uint64_t>(has_more_segments)) >
5000000000000000000ULL) {
buf[0] = '1';
} else {
buf[0] = '0';
}
}
} // precision <= 0
else {
exp += digits_in_the_first_segment - precision;
// When precision > 0, we divide the first segment into three
// subsegments, each with 9, 9, and 0 ~ 1 digits so that each fits
// in 32-bits which usually allows faster calculation than in
// 64-bits. Since some compiler (e.g. MSVC) doesn't know how to optimize
// division-by-constant for large 64-bit divisors, we do it here
// manually. The magic number 7922816251426433760 below is equal to
// ceil(2^(64+32) / 10^10).
const uint32_t first_subsegment = static_cast<uint32_t>(
dragonbox::umul128_upper64(first_segment, 7922816251426433760ULL) >>
32);
const uint64_t second_third_subsegments =
first_segment - first_subsegment * 10000000000ULL;
uint64_t prod;
uint32_t digits;
bool should_round_up;
int number_of_digits_to_print = precision > 9 ? 9 : precision;
// Print a 9-digits subsegment, either the first or the second.
auto print_subsegment = [&](uint32_t subsegment, char* buffer) {
int number_of_digits_printed = 0;
// If we want to print an odd number of digits from the subsegment,
if ((number_of_digits_to_print & 1) != 0) {
// Convert to 64-bit fixed-point fractional form with 1-digit
// integer part. The magic number 720575941 is a good enough
// approximation of 2^(32 + 24) / 10^8; see
// https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
// for details.
prod = ((subsegment * static_cast<uint64_t>(720575941)) >> 24) + 1;
digits = static_cast<uint32_t>(prod >> 32);
*buffer = static_cast<char>('0' + digits);
number_of_digits_printed++;
}
// If we want to print an even number of digits from the
// first_subsegment,
else {
// Convert to 64-bit fixed-point fractional form with 2-digits
// integer part. The magic number 450359963 is a good enough
// approximation of 2^(32 + 20) / 10^7; see
// https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
// for details.
prod = ((subsegment * static_cast<uint64_t>(450359963)) >> 20) + 1;
digits = static_cast<uint32_t>(prod >> 32);
copy2(buffer, digits2(digits));
number_of_digits_printed += 2;
}
// Print all digit pairs.
while (number_of_digits_printed < number_of_digits_to_print) {
prod = static_cast<uint32_t>(prod) * static_cast<uint64_t>(100);
digits = static_cast<uint32_t>(prod >> 32);
copy2(buffer + number_of_digits_printed, digits2(digits));
number_of_digits_printed += 2;
}
};
// Print first subsegment.
print_subsegment(first_subsegment, buf.data());
// Perform rounding if the first subsegment is the last subsegment to
// print.
if (precision <= 9) {
// Rounding inside the subsegment.
// We round-up if:
// - either the fractional part is strictly larger than 1/2, or
// - the fractional part is exactly 1/2 and the last digit is odd.
// We rely on the following observations:
// - If fractional_part >= threshold, then the fractional part is
// strictly larger than 1/2.
// - If the MSB of fractional_part is set, then the fractional part
// must be at least 1/2.
// - When the MSB of fractional_part is set, either
// second_third_subsegments being nonzero or has_more_segments
// being true means there are further digits not printed, so the
// fractional part is strictly larger than 1/2.
if (precision < 9) {
uint32_t fractional_part = static_cast<uint32_t>(prod);
should_round_up = fractional_part >=
data::fractional_part_rounding_thresholds
[8 - number_of_digits_to_print] ||
((fractional_part >> 31) &
((digits & 1) | (second_third_subsegments != 0) |
has_more_segments)) != 0;
}
// Rounding at the subsegment boundary.
// In this case, the fractional part is at least 1/2 if and only if
// second_third_subsegments >= 5000000000ULL, and is strictly larger
// than 1/2 if we further have either second_third_subsegments >
// 5000000000ULL or has_more_segments == true.
else {
should_round_up = second_third_subsegments > 5000000000ULL ||
(second_third_subsegments == 5000000000ULL &&
((digits & 1) != 0 || has_more_segments));
}
}
// Otherwise, print the second subsegment.
else {
// Compilers are not aware of how to leverage the maximum value of
// second_third_subsegments to find out a better magic number which
// allows us to eliminate an additional shift. 1844674407370955162 =
// ceil(2^64/10) < ceil(2^64*(10^9/(10^10 - 1))).
const uint32_t second_subsegment =
static_cast<uint32_t>(dragonbox::umul128_upper64(
second_third_subsegments, 1844674407370955162ULL));
const uint32_t third_subsegment =
static_cast<uint32_t>(second_third_subsegments) -
second_subsegment * 10;
number_of_digits_to_print = precision - 9;
print_subsegment(second_subsegment, buf.data() + 9);
// Rounding inside the subsegment.
if (precision < 18) {
// The condition third_subsegment != 0 implies that the segment was
// of 19 digits, so in this case the third segment should be
// consisting of a genuine digit from the input.
uint32_t fractional_part = static_cast<uint32_t>(prod);
should_round_up = fractional_part >=
data::fractional_part_rounding_thresholds
[8 - number_of_digits_to_print] ||
((fractional_part >> 31) &
((digits & 1) | (third_subsegment != 0) |
has_more_segments)) != 0;
}
// Rounding at the subsegment boundary.
else {
// In this case, the segment must be of 19 digits, thus
// the third subsegment should be consisting of a genuine digit from
// the input.
should_round_up = third_subsegment > 5 ||
(third_subsegment == 5 &&
((digits & 1) != 0 || has_more_segments));
}
}
// Round-up if necessary.
if (should_round_up) {
++buf[precision - 1];
for (int i = precision - 1; i > 0 && buf[i] > '9'; --i) {
buf[i] = '0';
++buf[i - 1];
}
if (buf[0] > '9') {
buf[0] = '1';
if (fixed)
buf[precision++] = '0';
else
++exp;
}
}
buf.try_resize(to_unsigned(precision));
}
} // if (digits_in_the_first_segment > precision)
else {
// Adjust the exponent for its use in Dragon4.
exp += digits_in_the_first_segment - 1;
}
}
if (use_dragon) {
auto f = basic_fp<uint128_t>();
bool is_predecessor_closer = specs.binary32
? f.assign(static_cast<float>(value))
: f.assign(converted_value);
if (is_predecessor_closer) dragon_flags |= dragon::predecessor_closer;
if (fixed) dragon_flags |= dragon::fixed;
// Limit precision to the maximum possible number of significant digits in
// an IEEE754 double because we don't need to generate zeros.
const int max_double_digits = 767;
if (precision > max_double_digits) precision = max_double_digits;
format_dragon(f, dragon_flags, precision, buf, exp);
}
if (!fixed && !specs.showpoint) {
// Remove trailing zeros.
auto num_digits = buf.size();
while (num_digits > 0 && buf[num_digits - 1] == '0') {
--num_digits;
++exp;
}
buf.try_resize(num_digits);
}
return exp;
}
template <typename Char, typename OutputIt, typename T>
FMT_CONSTEXPR20 auto write_float(OutputIt out, T value,
format_specs<Char> specs, locale_ref loc)
-> OutputIt {
if (const_check(!is_supported_floating_point(value))) return out;
float_specs fspecs = parse_float_type_spec(specs);
fspecs.sign = specs.sign;
if (detail::signbit(value)) { // value < 0 is false for NaN so use signbit.
@@ -1995,7 +3829,7 @@ FMT_CONSTEXPR20 auto write(OutputIt out, T value,
}
if (!detail::isfinite(value))
return write_nonfinite(out, detail::isinf(value), specs, fspecs);
return write_nonfinite(out, detail::isnan(value), specs, fspecs);
if (specs.align == align::numeric && fspecs.sign) {
auto it = reserve(out, 1);
@@ -2008,7 +3842,7 @@ FMT_CONSTEXPR20 auto write(OutputIt out, T value,
memory_buffer buffer;
if (fspecs.format == float_format::hex) {
if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
format_hexfloat(convert_float(value), specs.precision, fspecs, buffer);
return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
specs);
}
@@ -2020,53 +3854,59 @@ FMT_CONSTEXPR20 auto write(OutputIt out, T value,
throw_format_error("number is too big");
else
++precision;
} else if (fspecs.format != float_format::fixed && precision == 0) {
precision = 1;
}
if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
if (!is_fast_float<T>()) fspecs.fallback = true;
int exp = format_float(promote_float(value), precision, fspecs, buffer);
int exp = format_float(convert_float(value), precision, fspecs, buffer);
fspecs.precision = precision;
auto fp = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
return write_float(out, fp, specs, fspecs, loc);
auto f = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
return write_float(out, f, specs, fspecs, loc);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_floating_point<T>::value)>
FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs<Char> specs,
locale_ref loc = {}) -> OutputIt {
if (const_check(!is_supported_floating_point(value))) return out;
return specs.localized && write_loc(out, value, specs, loc)
? out
: write_float(out, value, specs, loc);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_fast_float<T>::value)>
FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
if (is_constant_evaluated()) {
return write(out, value, basic_format_specs<Char>());
}
if (is_constant_evaluated()) return write(out, value, format_specs<Char>());
if (const_check(!is_supported_floating_point(value))) return out;
using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
using uint = typename dragonbox::float_info<floaty>::carrier_uint;
auto bits = bit_cast<uint>(value);
auto fspecs = float_specs();
if (detail::signbit(value)) {
fspecs.sign = sign::minus;
value = -value;
}
constexpr auto specs = basic_format_specs<Char>();
uint mask = exponent_mask<floaty>();
if ((bits & mask) == mask)
return write_nonfinite(out, std::isinf(value), specs, fspecs);
constexpr auto specs = format_specs<Char>();
using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
using floaty_uint = typename dragonbox::float_info<floaty>::carrier_uint;
floaty_uint mask = exponent_mask<floaty>();
if ((bit_cast<floaty_uint>(value) & mask) == mask)
return write_nonfinite(out, std::isnan(value), specs, fspecs);
auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
return write_float(out, dec, specs, fspecs, {});
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_floating_point<T>::value &&
FMT_ENABLE_IF(is_floating_point<T>::value &&
!is_fast_float<T>::value)>
inline auto write(OutputIt out, T value) -> OutputIt {
return write(out, value, basic_format_specs<Char>());
return write(out, value, format_specs<Char>());
}
template <typename Char, typename OutputIt>
auto write(OutputIt out, monostate, basic_format_specs<Char> = {},
locale_ref = {}) -> OutputIt {
auto write(OutputIt out, monostate, format_specs<Char> = {}, locale_ref = {})
-> OutputIt {
FMT_ASSERT(false, "");
return out;
}
@@ -2085,28 +3925,6 @@ constexpr auto write(OutputIt out, const T& value) -> OutputIt {
return write<Char>(out, to_string_view(value));
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_integral<T>::value &&
!std::is_same<T, bool>::value &&
!std::is_same<T, Char>::value)>
FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(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 size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
auto it = reserve(out, size);
if (auto ptr = to_pointer<Char>(it, size)) {
if (negative) *ptr++ = static_cast<Char>('-');
format_decimal<Char>(ptr, abs_value, num_digits);
return out;
}
if (negative) *it++ = static_cast<Char>('-');
it = format_decimal<Char>(it, abs_value, num_digits).end;
return base_iterator(out, it);
}
// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
template <
typename Char, typename OutputIt, typename T,
@@ -2116,15 +3934,14 @@ template <
type::custom_type,
FMT_ENABLE_IF(check)>
FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
return write<Char>(
out, static_cast<typename std::underlying_type<T>::type>(value));
return write<Char>(out, static_cast<underlying_t<T>>(value));
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_same<T, bool>::value)>
FMT_CONSTEXPR auto write(OutputIt out, T value,
const basic_format_specs<Char>& specs = {},
locale_ref = {}) -> OutputIt {
const format_specs<Char>& specs = {}, locale_ref = {})
-> OutputIt {
return specs.type != presentation_type::none &&
specs.type != presentation_type::string
? write(out, value ? 1 : 0, specs, {})
@@ -2141,21 +3958,16 @@ FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt {
template <typename Char, typename OutputIt>
FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
-> OutputIt {
if (!value) {
throw_format_error("string pointer is null");
} else {
out = write(out, basic_string_view<Char>(value));
}
if (value) return write(out, basic_string_view<Char>(value));
throw_format_error("string pointer is null");
return out;
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_same<T, void>::value)>
auto write(OutputIt out, const T* value,
const basic_format_specs<Char>& specs = {}, locale_ref = {})
-> OutputIt {
check_pointer_type_spec(specs.type, error_handler());
return write_ptr<Char>(out, to_uintptr(value), &specs);
auto write(OutputIt out, const T* value, const format_specs<Char>& specs = {},
locale_ref = {}) -> OutputIt {
return write_ptr<Char>(out, bit_cast<uintptr_t>(value), &specs);
}
// A write overload that handles implicit conversions.
@@ -2163,9 +3975,9 @@ template <typename Char, typename OutputIt, typename T,
typename Context = basic_format_context<OutputIt, Char>>
FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
std::is_class<T>::value && !is_string<T>::value &&
!std::is_same<T, Char>::value &&
!std::is_same<const T&,
decltype(arg_mapper<Context>().map(value))>::value,
!is_floating_point<T>::value && !std::is_same<T, Char>::value &&
!std::is_same<T, remove_cvref_t<decltype(arg_mapper<Context>().map(
value))>>::value,
OutputIt> {
return write<Char>(out, arg_mapper<Context>().map(value));
}
@@ -2175,12 +3987,8 @@ template <typename Char, typename OutputIt, typename T,
FMT_CONSTEXPR auto write(OutputIt out, const T& value)
-> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
OutputIt> {
using formatter_type =
conditional_t<has_formatter<T, Context>::value,
typename Context::template formatter_type<T>,
fallback_formatter<T, Char>>;
auto ctx = Context(out, {}, {});
return formatter_type().format(value, ctx);
return typename Context::template formatter_type<T>().format(value, ctx);
}
// An argument visitor that formats the argument and writes it via the output
@@ -2209,7 +4017,7 @@ template <typename Char> struct arg_formatter {
using context = buffer_context<Char>;
iterator out;
const basic_format_specs<Char>& specs;
const format_specs<Char>& specs;
locale_ref locale;
template <typename T>
@@ -2234,12 +4042,6 @@ template <typename Char> struct custom_formatter {
template <typename T> void operator()(T) const {}
};
template <typename T>
using is_integer =
bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
!std::is_same<T, char>::value &&
!std::is_same<T, wchar_t>::value>;
template <typename ErrorHandler> class width_checker {
public:
explicit FMT_CONSTEXPR width_checker(ErrorHandler& eh) : handler_(eh) {}
@@ -2296,48 +4098,6 @@ FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) ->
return arg;
}
// The standard format specifier handler with checking.
template <typename Char> class specs_handler : public specs_setter<Char> {
private:
basic_format_parse_context<Char>& parse_context_;
buffer_context<Char>& context_;
// This is only needed for compatibility with gcc 4.4.
using format_arg = basic_format_arg<buffer_context<Char>>;
FMT_CONSTEXPR auto get_arg(auto_id) -> format_arg {
return detail::get_arg(context_, parse_context_.next_arg_id());
}
FMT_CONSTEXPR auto get_arg(int arg_id) -> format_arg {
parse_context_.check_arg_id(arg_id);
return detail::get_arg(context_, arg_id);
}
FMT_CONSTEXPR auto get_arg(basic_string_view<Char> arg_id) -> format_arg {
parse_context_.check_arg_id(arg_id);
return detail::get_arg(context_, arg_id);
}
public:
FMT_CONSTEXPR specs_handler(basic_format_specs<Char>& specs,
basic_format_parse_context<Char>& parse_ctx,
buffer_context<Char>& ctx)
: specs_setter<Char>(specs), parse_context_(parse_ctx), context_(ctx) {}
template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
this->specs_.width = get_dynamic_spec<width_checker>(
get_arg(arg_id), context_.error_handler());
}
template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
this->specs_.precision = get_dynamic_spec<precision_checker>(
get_arg(arg_id), context_.error_handler());
}
void on_error(const char* message) { context_.on_error(message); }
};
template <template <typename> class Handler, typename Context>
FMT_CONSTEXPR void handle_dynamic_spec(int& value,
arg_ref<typename Context::char_type> ref,
@@ -2346,53 +4106,27 @@ FMT_CONSTEXPR void handle_dynamic_spec(int& value,
case arg_id_kind::none:
break;
case arg_id_kind::index:
value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.index),
value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.index),
ctx.error_handler());
break;
case arg_id_kind::name:
value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.name),
value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.name),
ctx.error_handler());
break;
}
}
#define FMT_STRING_IMPL(s, base, explicit) \
[] { \
/* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
/* Use a macro-like name to avoid shadowing warnings. */ \
struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base { \
using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \
operator fmt::basic_string_view<char_type>() const { \
return fmt::detail_exported::compile_string_to_view<char_type>(s); \
} \
}; \
return FMT_COMPILE_STRING(); \
}()
/**
\rst
Constructs a compile-time format string from a string literal *s*.
**Example**::
// A compile-time error because 'd' is an invalid specifier for strings.
std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
\endrst
*/
#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
#if FMT_USE_USER_DEFINED_LITERALS
template <typename Char> struct udl_formatter {
basic_string_view<Char> str;
template <typename... T>
auto operator()(T&&... args) const -> std::basic_string<Char> {
return vformat(str, fmt::make_args_checked<T...>(str, args...));
return vformat(str, fmt::make_format_args<buffer_context<Char>>(args...));
}
};
# if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
# if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <typename T, typename Char, size_t N,
fmt::detail_exported::fixed_string<Char, N> Str>
struct statically_named_arg : view {
@@ -2430,21 +4164,21 @@ template <typename Char> struct udl_arg {
#endif // FMT_USE_USER_DEFINED_LITERALS
template <typename Locale, typename Char>
auto vformat(const Locale& loc, basic_string_view<Char> format_str,
auto vformat(const Locale& loc, basic_string_view<Char> fmt,
basic_format_args<buffer_context<type_identity_t<Char>>> args)
-> std::basic_string<Char> {
basic_memory_buffer<Char> buffer;
detail::vformat_to(buffer, format_str, args, detail::locale_ref(loc));
return {buffer.data(), buffer.size()};
auto buf = basic_memory_buffer<Char>();
detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
return {buf.data(), buf.size()};
}
using format_func = void (*)(detail::buffer<char>&, int, const char*);
FMT_API void format_error_code(buffer<char>& out, int error_code,
string_view message) FMT_NOEXCEPT;
string_view message) noexcept;
FMT_API void report_error(format_func func, int error_code,
const char* message) FMT_NOEXCEPT;
const char* message) noexcept;
FMT_END_DETAIL_NAMESPACE
FMT_API auto vsystem_error(int error_code, string_view format_str,
@@ -2490,12 +4224,11 @@ auto system_error(int error_code, format_string<T...> fmt, T&&... args)
\endrst
*/
FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
const char* message) FMT_NOEXCEPT;
const char* message) noexcept;
// Reports a system error without throwing an exception.
// Can be used to report errors from destructors.
FMT_API void report_system_error(int error_code,
const char* message) FMT_NOEXCEPT;
FMT_API void report_system_error(int error_code, const char* message) noexcept;
/** Fast integer formatter. */
class format_int {
@@ -2558,46 +4291,16 @@ class format_int {
};
template <typename T, typename Char>
template <typename FormatContext>
FMT_CONSTEXPR FMT_INLINE auto
formatter<T, Char,
enable_if_t<detail::type_constant<T, Char>::value !=
detail::type::custom_type>>::format(const T& val,
FormatContext& ctx)
const -> decltype(ctx.out()) {
if (specs_.width_ref.kind != detail::arg_id_kind::none ||
specs_.precision_ref.kind != detail::arg_id_kind::none) {
auto specs = specs_;
detail::handle_dynamic_spec<detail::width_checker>(specs.width,
specs.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs.precision, specs.precision_ref, ctx);
return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
}
return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
}
struct formatter<T, Char, enable_if_t<detail::has_format_as<T>::value>>
: private formatter<detail::format_as_t<T>> {
using base = formatter<detail::format_as_t<T>>;
using base::parse;
#define FMT_FORMAT_AS(Type, Base) \
template <typename Char> \
struct formatter<Type, Char> : formatter<Base, Char> { \
template <typename FormatContext> \
auto format(Type const& val, FormatContext& ctx) const \
-> decltype(ctx.out()) { \
return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
} \
template <typename FormatContext>
auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) {
return base::format(format_as(value), ctx);
}
FMT_FORMAT_AS(signed char, int);
FMT_FORMAT_AS(unsigned char, unsigned);
FMT_FORMAT_AS(short, int);
FMT_FORMAT_AS(unsigned short, unsigned);
FMT_FORMAT_AS(long, long long);
FMT_FORMAT_AS(unsigned long, unsigned long long);
FMT_FORMAT_AS(Char*, const Char*);
FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
FMT_FORMAT_AS(std::nullptr_t, const void*);
FMT_FORMAT_AS(detail::byte, unsigned char);
FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
};
template <typename Char>
struct formatter<void*, Char> : formatter<const void*, Char> {
@@ -2616,58 +4319,6 @@ struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
}
};
// A formatter for types known only at run time such as variant alternatives.
//
// Usage:
// using variant = std::variant<int, std::string>;
// template <>
// struct formatter<variant>: dynamic_formatter<> {
// auto format(const variant& v, format_context& ctx) {
// return visit([&](const auto& val) {
// return dynamic_formatter<>::format(val, ctx);
// }, v);
// }
// };
template <typename Char = char> class dynamic_formatter {
private:
detail::dynamic_format_specs<Char> specs_;
const Char* format_str_;
struct null_handler : detail::error_handler {
void on_align(align_t) {}
void on_sign(sign_t) {}
void on_hash() {}
};
template <typename Context> void handle_specs(Context& ctx) {
detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
specs_.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs_.precision, specs_.precision_ref, ctx);
}
public:
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
format_str_ = ctx.begin();
// Checks are deferred to formatting time when the argument type is known.
detail::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
return detail::parse_format_specs(ctx.begin(), ctx.end(), handler);
}
template <typename T, typename FormatContext>
auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
handle_specs(ctx);
detail::specs_checker<null_handler> checker(
null_handler(), detail::mapped_type_constant<T, FormatContext>::value);
checker.on_align(specs_.align);
if (specs_.sign != sign::none) checker.on_sign(specs_.sign);
if (specs_.alt) checker.on_hash();
if (specs_.precision >= 0) checker.end_precision();
return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
}
};
/**
\rst
Converts ``p`` to ``const void*`` for pointer formatting.
@@ -2681,13 +4332,36 @@ template <typename T> auto ptr(T p) -> const void* {
static_assert(std::is_pointer<T>::value, "");
return detail::bit_cast<const void*>(p);
}
template <typename T> auto ptr(const std::unique_ptr<T>& p) -> const void* {
template <typename T, typename Deleter>
auto ptr(const std::unique_ptr<T, Deleter>& p) -> const void* {
return p.get();
}
template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
return p.get();
}
/**
\rst
Converts ``e`` to the underlying type.
**Example**::
enum class color { red, green, blue };
auto s = fmt::format("{}", fmt::underlying(color::red));
\endrst
*/
template <typename Enum>
constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
return static_cast<underlying_t<Enum>>(e);
}
namespace enums {
template <typename Enum, FMT_ENABLE_IF(std::is_enum<Enum>::value)>
constexpr auto format_as(Enum e) noexcept -> underlying_t<Enum> {
return static_cast<underlying_t<Enum>>(e);
}
} // namespace enums
class bytes {
private:
string_view data_;
@@ -2699,17 +4373,13 @@ class bytes {
template <> struct formatter<bytes> {
private:
detail::dynamic_format_specs<char> specs_;
detail::dynamic_format_specs<> specs_;
public:
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
using handler_type = detail::dynamic_specs_handler<ParseContext>;
detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
detail::type::string_type);
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
detail::check_string_type_spec(specs_.type, ctx.error_handler());
return it;
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
detail::type::string_type);
}
template <typename FormatContext>
@@ -2742,17 +4412,13 @@ template <typename T> auto group_digits(T value) -> group_digits_view<T> {
template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
private:
detail::dynamic_format_specs<char> specs_;
detail::dynamic_format_specs<> specs_;
public:
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
using handler_type = detail::dynamic_specs_handler<ParseContext>;
detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
detail::type::int_type);
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
detail::check_string_type_spec(specs_.type, ctx.error_handler());
return it;
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
detail::type::int_type);
}
template <typename FormatContext>
@@ -2762,12 +4428,13 @@ template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
specs_.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs_.precision, specs_.precision_ref, ctx);
return detail::write_int_localized(
return detail::write_int(
ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
detail::digit_grouping<char>({"\3", ','}));
detail::digit_grouping<char>("\3", ","));
}
};
// DEPRECATED! join_view will be moved to ranges.h.
template <typename It, typename Sentinel, typename Char = char>
struct join_view : detail::view {
It begin;
@@ -2778,9 +4445,6 @@ struct join_view : detail::view {
: begin(b), end(e), sep(s) {}
};
template <typename It, typename Sentinel, typename Char>
using arg_join FMT_DEPRECATED_ALIAS = join_view<It, Sentinel, Char>;
template <typename It, typename Sentinel, typename Char>
struct formatter<join_view<It, Sentinel, Char>, Char> {
private:
@@ -2790,45 +4454,26 @@ struct formatter<join_view<It, Sentinel, Char>, Char> {
#else
typename std::iterator_traits<It>::value_type;
#endif
using context = buffer_context<Char>;
using mapper = detail::arg_mapper<context>;
template <typename T, FMT_ENABLE_IF(has_formatter<T, context>::value)>
static auto map(const T& value) -> const T& {
return value;
}
template <typename T, FMT_ENABLE_IF(!has_formatter<T, context>::value)>
static auto map(const T& value) -> decltype(mapper().map(value)) {
return mapper().map(value);
}
using formatter_type =
conditional_t<is_formattable<value_type, Char>::value,
formatter<remove_cvref_t<decltype(map(
std::declval<const value_type&>()))>,
Char>,
detail::fallback_formatter<value_type, Char>>;
formatter_type value_formatter_;
formatter<remove_cvref_t<value_type>, Char> value_formatter_;
public:
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
return value_formatter_.parse(ctx);
}
template <typename FormatContext>
auto format(const join_view<It, Sentinel, Char>& value, FormatContext& ctx)
-> decltype(ctx.out()) {
auto format(const join_view<It, Sentinel, Char>& value,
FormatContext& ctx) const -> decltype(ctx.out()) {
auto it = value.begin;
auto out = ctx.out();
if (it != value.end) {
out = value_formatter_.format(map(*it), ctx);
out = value_formatter_.format(*it, ctx);
++it;
while (it != value.end) {
out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
ctx.advance_to(out);
out = value_formatter_.format(map(*it), ctx);
out = value_formatter_.format(*it, ctx);
++it;
}
}
@@ -2880,9 +4525,9 @@ auto join(Range&& range, string_view sep)
*/
template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
inline auto to_string(const T& value) -> std::string {
auto result = std::string();
detail::write<char>(std::back_inserter(result), value);
return result;
auto buffer = memory_buffer();
detail::write<char>(appender(buffer), value);
return {buffer.data(), buffer.size()};
}
template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
@@ -2906,24 +4551,8 @@ FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
FMT_BEGIN_DETAIL_NAMESPACE
template <typename Char>
void vformat_to(
buffer<Char>& buf, basic_string_view<Char> fmt,
basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
locale_ref loc) {
// workaround for msvc bug regarding name-lookup in module
// link names into function scope
using detail::arg_formatter;
using detail::buffer_appender;
using detail::custom_formatter;
using detail::default_arg_formatter;
using detail::get_arg;
using detail::locale_ref;
using detail::parse_format_specs;
using detail::specs_checker;
using detail::specs_handler;
using detail::to_unsigned;
using detail::type;
using detail::write;
void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
typename vformat_args<Char>::type args, locale_ref loc) {
auto out = buffer_appender<Char>(buf);
if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
auto arg = args.get(0);
@@ -2936,9 +4565,10 @@ void vformat_to(
basic_format_parse_context<Char> parse_context;
buffer_context<Char> context;
format_handler(buffer_appender<Char> out, basic_string_view<Char> str,
basic_format_args<buffer_context<Char>> args, locale_ref loc)
: parse_context(str), context(out, args, loc) {}
format_handler(buffer_appender<Char> p_out, basic_string_view<Char> str,
basic_format_args<buffer_context<Char>> p_args,
locale_ref p_loc)
: parse_context(str), context(p_out, p_args, p_loc) {}
void on_text(const Char* begin, const Char* end) {
auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
@@ -2969,15 +4599,16 @@ void vformat_to(
-> const Char* {
auto arg = get_arg(context, id);
if (arg.type() == type::custom_type) {
parse_context.advance_to(parse_context.begin() +
(begin - &*parse_context.begin()));
parse_context.advance_to(begin);
visit_format_arg(custom_formatter<Char>{parse_context, context}, arg);
return parse_context.begin();
}
auto specs = basic_format_specs<Char>();
specs_checker<specs_handler<Char>> handler(
specs_handler<Char>(specs, parse_context, context), arg.type());
begin = parse_format_specs(begin, end, handler);
auto specs = detail::dynamic_format_specs<Char>();
begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
detail::handle_dynamic_spec<detail::width_checker>(
specs.width, specs.width_ref, context);
detail::handle_dynamic_spec<detail::precision_checker>(
specs.precision, specs.precision_ref, context);
if (begin == end || *begin != '}')
on_error("missing '}' in format string");
auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
@@ -2989,26 +4620,15 @@ void vformat_to(
}
#ifndef FMT_HEADER_ONLY
extern template FMT_API void vformat_to(buffer<char>&, string_view,
typename vformat_args<>::type,
locale_ref);
extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
-> thousands_sep_result<char>;
extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
-> thousands_sep_result<wchar_t>;
extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
extern template auto format_float<double>(double value, int precision,
float_specs specs, buffer<char>& buf)
-> int;
extern template auto format_float<long double>(long double value, int precision,
float_specs specs,
buffer<char>& buf) -> int;
void snprintf_float(float, int, float_specs, buffer<char>&) = delete;
extern template auto snprintf_float<double>(double value, int precision,
float_specs specs,
buffer<char>& buf) -> int;
extern template auto snprintf_float<long double>(long double value,
int precision,
float_specs specs,
buffer<char>& buf) -> int;
#endif // FMT_HEADER_ONLY
FMT_END_DETAIL_NAMESPACE
@@ -3025,25 +4645,16 @@ inline namespace literals {
fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
\endrst
*/
# if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
template <detail_exported::fixed_string Str>
constexpr auto operator""_a()
-> detail::udl_arg<remove_cvref_t<decltype(Str.data[0])>,
sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str> {
return {};
# if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <detail_exported::fixed_string Str> constexpr auto operator""_a() {
using char_t = remove_cvref_t<decltype(Str.data[0])>;
return detail::udl_arg<char_t, sizeof(Str.data) / sizeof(char_t), Str>();
}
# else
constexpr auto operator"" _a(const char* s, size_t) -> detail::udl_arg<char> {
return {s};
}
# endif
// DEPRECATED!
// User-defined literal equivalent of fmt::format.
FMT_DEPRECATED constexpr auto operator"" _format(const char* s, size_t n)
-> detail::udl_formatter<char> {
return {{s, n}};
}
} // namespace literals
#endif // FMT_USE_USER_DEFINED_LITERALS
@@ -3057,15 +4668,7 @@ template <typename Locale, typename... T,
FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
-> std::string {
return vformat(loc, string_view(fmt), fmt::make_format_args(args...));
}
template <typename... T, size_t SIZE, typename Allocator>
FMT_DEPRECATED auto format_to(basic_memory_buffer<char, SIZE, Allocator>& buf,
format_string<T...> fmt, T&&... args)
-> appender {
detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...));
return appender(buf);
return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...));
}
template <typename OutputIt, typename Locale,
@@ -3076,7 +4679,7 @@ auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
using detail::get_buffer;
auto&& buf = get_buffer<char>(out);
detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
return detail::get_iterator(buf);
return detail::get_iterator(buf, out);
}
template <typename OutputIt, typename Locale, typename... T,
@@ -3087,12 +4690,40 @@ FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
}
FMT_MODULE_EXPORT_END
FMT_END_NAMESPACE
template <typename Locale, typename... T,
FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
FMT_NODISCARD FMT_INLINE auto formatted_size(const Locale& loc,
format_string<T...> fmt,
T&&... args) -> size_t {
auto buf = detail::counting_buffer<>();
detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...),
detail::locale_ref(loc));
return buf.count();
}
#ifdef FMT_DEPRECATED_INCLUDE_XCHAR
# include "xchar.h"
#endif
FMT_END_EXPORT
template <typename T, typename Char>
template <typename FormatContext>
FMT_CONSTEXPR FMT_INLINE auto
formatter<T, Char,
enable_if_t<detail::type_constant<T, Char>::value !=
detail::type::custom_type>>::format(const T& val,
FormatContext& ctx)
const -> decltype(ctx.out()) {
if (specs_.width_ref.kind != detail::arg_id_kind::none ||
specs_.precision_ref.kind != detail::arg_id_kind::none) {
auto specs = specs_;
detail::handle_dynamic_spec<detail::width_checker>(specs.width,
specs.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs.precision, specs.precision_ref, ctx);
return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
}
return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
}
FMT_END_NAMESPACE
#ifdef FMT_HEADER_ONLY
# define FMT_FUNC inline

7
source/blender/editors/space_file/asset_catalog_tree_view.cc
View File

@@ -404,8 +404,9 @@ std::string AssetCatalogDropTarget::drop_tooltip_asset_catalog(const wmDrag &dra
BLI_assert(drag.type == WM_DRAG_ASSET_CATALOG);
const AssetCatalog *src_catalog = get_drag_catalog(drag, get_asset_library());
return fmt::format(
TIP_("Move catalog {} into {}"), src_catalog->path.name(), catalog_item_.get_name());
return fmt::format(TIP_("Move catalog {} into {}"),
(std::string_view)src_catalog->path.name(),
(std::string_view)catalog_item_.get_name());
}
std::string AssetCatalogDropTarget::drop_tooltip_asset_list(const wmDrag &drag) const
@@ -619,7 +620,7 @@ std::string AssetCatalogTreeViewAllItem::DropTarget::drop_tooltip(const wmDrag &
drag, *get_view<AssetCatalogTreeView>().asset_library_);
return fmt::format(TIP_("Move catalog {} to the top level of the tree"),
drag_catalog->path.name());
(std::string_view)drag_catalog->path.name());
}
bool AssetCatalogTreeViewAllItem::DropTarget::on_drop(struct bContext * /*C*/,

11
source/blender/io/ply/exporter/ply_file_buffer.cc
View File

@@ -40,23 +40,26 @@ void FileBuffer::close_file()
void FileBuffer::write_header_element(StringRef name, int count)
{
write_fstring("element {} {}\n", name, count);
write_fstring("element {} {}\n", (std::string_view)name, count);
}
void FileBuffer::write_header_scalar_property(StringRef dataType, StringRef name)
{
write_fstring("property {} {}\n", dataType, name);
write_fstring("property {} {}\n", (std::string_view)dataType, (std::string_view)name);
}
void FileBuffer::write_header_list_property(StringRef countType,
StringRef dataType,
StringRef name)
{
write_fstring("property list {} {} {}\n", countType, dataType, name);
write_fstring("property list {} {} {}\n",
(std::string_view)countType,
(std::string_view)dataType,
(std::string_view)name);
}
void FileBuffer::write_string(StringRef s)
{
write_fstring("{}\n", s);
write_fstring("{}\n", (std::string_view)s);
}
void FileBuffer::write_newline()

14
source/blender/io/wavefront_obj/exporter/obj_export_io.hh
View File

@@ -108,11 +108,11 @@ class FormatHandler : NonCopyable, NonMovable {
}
void write_obj_usemtl(StringRef s)
{
write_impl("usemtl {}\n", s);
write_impl("usemtl {}\n", (std::string_view)s);
}
void write_obj_mtllib(StringRef s)
{
write_impl("mtllib {}\n", s);
write_impl("mtllib {}\n", (std::string_view)s);
}
void write_obj_smooth(int s)
{
@@ -120,11 +120,11 @@ class FormatHandler : NonCopyable, NonMovable {
}
void write_obj_group(StringRef s)
{
write_impl("g {}\n", s);
write_impl("g {}\n", (std::string_view)s);
}
void write_obj_object(StringRef s)
{
write_impl("o {}\n", s);
write_impl("o {}\n", (std::string_view)s);
}
void write_obj_edge(int a, int b)
{
@@ -169,7 +169,7 @@ class FormatHandler : NonCopyable, NonMovable {
void write_mtl_newmtl(StringRef s)
{
write_impl("newmtl {}\n", s);
write_impl("newmtl {}\n", (std::string_view)s);
}
void write_mtl_float(const char *type, float v)
{
@@ -186,12 +186,12 @@ class FormatHandler : NonCopyable, NonMovable {
/* NOTE: options, if present, will have its own leading space. */
void write_mtl_map(const char *type, StringRef options, StringRef value)
{
write_impl("{}{} {}\n", type, options, value);
write_impl("{}{} {}\n", type, (std::string_view)options, (std::string_view)value);
}
void write_string(StringRef s)
{
write_impl("{}\n", s);
write_impl("{}\n", (std::string_view)s);
}
private: