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-rw-r--r--src/3rdparty/CMakeLists.txt1
-rw-r--r--src/3rdparty/fmt/CMakeLists.txt5
-rw-r--r--src/3rdparty/fmt/LICENSE.rst27
-rw-r--r--src/3rdparty/fmt/core.h2122
-rw-r--r--src/3rdparty/fmt/format-inl.h2801
-rw-r--r--src/3rdparty/fmt/format.h3960
6 files changed, 8916 insertions, 0 deletions
diff --git a/src/3rdparty/CMakeLists.txt b/src/3rdparty/CMakeLists.txt
index ca082cf78..50fa6922f 100644
--- a/src/3rdparty/CMakeLists.txt
+++ b/src/3rdparty/CMakeLists.txt
@@ -1,3 +1,4 @@
+add_subdirectory(fmt)
add_subdirectory(md5)
add_subdirectory(squirrel)
add_subdirectory(opengl)
diff --git a/src/3rdparty/fmt/CMakeLists.txt b/src/3rdparty/fmt/CMakeLists.txt
new file mode 100644
index 000000000..22a02416c
--- /dev/null
+++ b/src/3rdparty/fmt/CMakeLists.txt
@@ -0,0 +1,5 @@
+add_files(
+ core.h
+ format.h
+ format-inl.h
+)
diff --git a/src/3rdparty/fmt/LICENSE.rst b/src/3rdparty/fmt/LICENSE.rst
new file mode 100644
index 000000000..f0ec3db4d
--- /dev/null
+++ b/src/3rdparty/fmt/LICENSE.rst
@@ -0,0 +1,27 @@
+Copyright (c) 2012 - present, Victor Zverovich
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+--- Optional exception to the license ---
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into a machine-executable object form of such
+source code, you may redistribute such embedded portions in such object form
+without including the above copyright and permission notices.
diff --git a/src/3rdparty/fmt/core.h b/src/3rdparty/fmt/core.h
new file mode 100644
index 000000000..0a81e0ccd
--- /dev/null
+++ b/src/3rdparty/fmt/core.h
@@ -0,0 +1,2122 @@
+// Formatting library for C++ - the core API
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CORE_H_
+#define FMT_CORE_H_
+
+#include <cstdio> // std::FILE
+#include <cstring>
+#include <functional>
+#include <iterator>
+#include <memory>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+// The fmt library version in the form major * 10000 + minor * 100 + patch.
+#define FMT_VERSION 70103
+
+#ifdef __clang__
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+#else
+# define FMT_CLANG_VERSION 0
+#endif
+
+#if defined(__GNUC__) && !defined(__clang__)
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+#else
+# define FMT_GCC_VERSION 0
+#endif
+
+#if defined(__INTEL_COMPILER)
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#else
+# define FMT_ICC_VERSION 0
+#endif
+
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+# define FMT_HAS_GXX_CXX11 FMT_GCC_VERSION
+#else
+# define FMT_HAS_GXX_CXX11 0
+#endif
+
+#ifdef __NVCC__
+# define FMT_NVCC __NVCC__
+#else
+# define FMT_NVCC 0
+#endif
+
+#ifdef _MSC_VER
+# define FMT_MSC_VER _MSC_VER
+# define FMT_SUPPRESS_MSC_WARNING(n) __pragma(warning(suppress : n))
+#else
+# define FMT_MSC_VER 0
+# define FMT_SUPPRESS_MSC_WARNING(n)
+#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_ICC_VERSION || FMT_ICC_VERSION >= 1600)
+# define FMT_HAS_INCLUDE(x) __has_include(x)
+#else
+# define FMT_HAS_INCLUDE(x) 0
+#endif
+
+#ifdef __has_cpp_attribute
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
+ (__cplusplus >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
+ (__cplusplus >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
+
+// Check if relaxed C++14 constexpr is supported.
+// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
+#ifndef FMT_USE_CONSTEXPR
+# define FMT_USE_CONSTEXPR \
+ (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1910 || \
+ (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) && \
+ !FMT_NVCC && !FMT_ICC_VERSION
+#endif
+#if FMT_USE_CONSTEXPR
+# define FMT_CONSTEXPR constexpr
+# define FMT_CONSTEXPR_DECL constexpr
+#else
+# define FMT_CONSTEXPR inline
+# define FMT_CONSTEXPR_DECL
+#endif
+
+#ifndef FMT_OVERRIDE
+# if FMT_HAS_FEATURE(cxx_override_control) || \
+ (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
+# define FMT_OVERRIDE override
+# else
+# define FMT_OVERRIDE
+# endif
+#endif
+
+// Check if exceptions are disabled.
+#ifndef FMT_EXCEPTIONS
+# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
+ FMT_MSC_VER && !_HAS_EXCEPTIONS
+# define FMT_EXCEPTIONS 0
+# else
+# define FMT_EXCEPTIONS 1
+# endif
+#endif
+
+// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
+#ifndef FMT_USE_NOEXCEPT
+# define FMT_USE_NOEXCEPT 0
+#endif
+
+#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
+ (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900
+# define FMT_DETECTED_NOEXCEPT noexcept
+# define FMT_HAS_CXX11_NOEXCEPT 1
+#else
+# define FMT_DETECTED_NOEXCEPT throw()
+# define FMT_HAS_CXX11_NOEXCEPT 0
+#endif
+
+#ifndef FMT_NOEXCEPT
+# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
+# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
+# else
+# define FMT_NOEXCEPT
+# endif
+#endif
+
+// [[noreturn]] is disabled on MSVC and NVCC because of bogus unreachable code
+// warnings.
+#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER && \
+ !FMT_NVCC
+# define FMT_NORETURN [[noreturn]]
+#else
+# define FMT_NORETURN
+#endif
+
+#ifndef FMT_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
+#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_INLINE
+# if FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_INLINE inline __attribute__((always_inline))
+# else
+# define FMT_INLINE inline
+# endif
+#endif
+
+#ifndef FMT_USE_INLINE_NAMESPACES
+# if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \
+ (FMT_MSC_VER >= 1900 && !_MANAGED)
+# define FMT_USE_INLINE_NAMESPACES 1
+# else
+# define FMT_USE_INLINE_NAMESPACES 0
+# endif
+#endif
+
+#ifndef FMT_BEGIN_NAMESPACE
+# if FMT_USE_INLINE_NAMESPACES
+# define FMT_INLINE_NAMESPACE inline namespace
+# define FMT_END_NAMESPACE \
+ } \
+ }
+# else
+# define FMT_INLINE_NAMESPACE namespace
+# define FMT_END_NAMESPACE \
+ } \
+ using namespace v7; \
+ }
+# endif
+# define FMT_BEGIN_NAMESPACE \
+ namespace fmt { \
+ FMT_INLINE_NAMESPACE v7 {
+#endif
+
+#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
+# define FMT_CLASS_API FMT_SUPPRESS_MSC_WARNING(4275)
+# ifdef FMT_EXPORT
+# define FMT_API __declspec(dllexport)
+# define FMT_EXTERN_TEMPLATE_API FMT_API
+# define FMT_EXPORTED
+# elif defined(FMT_SHARED)
+# define FMT_API __declspec(dllimport)
+# define FMT_EXTERN_TEMPLATE_API FMT_API
+# endif
+#else
+# define FMT_CLASS_API
+#endif
+#ifndef FMT_API
+# define FMT_API
+#endif
+#ifndef FMT_EXTERN_TEMPLATE_API
+# define FMT_EXTERN_TEMPLATE_API
+#endif
+#ifndef FMT_INSTANTIATION_DEF_API
+# define FMT_INSTANTIATION_DEF_API FMT_API
+#endif
+
+#ifndef FMT_HEADER_ONLY
+# define FMT_EXTERN extern
+#else
+# define FMT_EXTERN
+#endif
+
+// libc++ supports string_view in pre-c++17.
+#if (FMT_HAS_INCLUDE(<string_view>) && \
+ (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
+ (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
+# include <string_view>
+# define FMT_USE_STRING_VIEW
+#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
+# include <experimental/string_view>
+# define FMT_USE_EXPERIMENTAL_STRING_VIEW
+#endif
+
+#ifndef FMT_UNICODE
+# define FMT_UNICODE !FMT_MSC_VER
+#endif
+#if FMT_UNICODE && FMT_MSC_VER
+# pragma execution_character_set("utf-8")
+#endif
+
+FMT_BEGIN_NAMESPACE
+
+// Implementations of enable_if_t and other metafunctions for older systems.
+template <bool B, class T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+template <bool B, class T, class F>
+using conditional_t = typename std::conditional<B, T, F>::type;
+template <bool B> using bool_constant = std::integral_constant<bool, B>;
+template <typename T>
+using remove_reference_t = typename std::remove_reference<T>::type;
+template <typename T>
+using remove_const_t = typename std::remove_const<T>::type;
+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;
+
+struct monostate {};
+
+// An enable_if helper to be used in template parameters which results in much
+// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
+// to workaround a bug in MSVC 2019 (see #1140 and #1186).
+#define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0
+
+namespace detail {
+
+// A helper function to suppress "conditional expression is constant" warnings.
+template <typename T> constexpr T const_check(T value) { return value; }
+
+FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
+ const char* message);
+
+#ifndef FMT_ASSERT
+# ifdef NDEBUG
+// FMT_ASSERT is not empty to avoid -Werror=empty-body.
+# define FMT_ASSERT(condition, message) ((void)0)
+# else
+# define FMT_ASSERT(condition, message) \
+ ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
+ ? (void)0 \
+ : ::fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
+# endif
+#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)
+template <typename Char>
+using std_string_view = std::experimental::basic_string_view<Char>;
+#else
+template <typename T> struct std_string_view {};
+#endif
+
+#ifdef FMT_USE_INT128
+// Do nothing.
+#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \
+ !(FMT_CLANG_VERSION && FMT_MSC_VER)
+# define FMT_USE_INT128 1
+using int128_t = __int128_t;
+using uint128_t = __uint128_t;
+#else
+# define FMT_USE_INT128 0
+#endif
+#if !FMT_USE_INT128
+struct int128_t {};
+struct uint128_t {};
+#endif
+
+// Casts a nonnegative integer to unsigned.
+template <typename Int>
+FMT_CONSTEXPR typename std::make_unsigned<Int>::type to_unsigned(Int value) {
+ FMT_ASSERT(value >= 0, "negative value");
+ return static_cast<typename std::make_unsigned<Int>::type>(value);
+}
+
+FMT_SUPPRESS_MSC_WARNING(4566) constexpr unsigned char micro[] = "\u00B5";
+
+template <typename Char> constexpr bool is_unicode() {
+ return FMT_UNICODE || sizeof(Char) != 1 ||
+ (sizeof(micro) == 3 && micro[0] == 0xC2 && micro[1] == 0xB5);
+}
+
+#ifdef __cpp_char8_t
+using char8_type = char8_t;
+#else
+enum char8_type : unsigned char {};
+#endif
+} // namespace detail
+
+#ifdef FMT_USE_INTERNAL
+namespace internal = detail; // DEPRECATED
+#endif
+
+/**
+ An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
+ subset of the API. ``fmt::basic_string_view`` is used for format strings even
+ if ``std::string_view`` is available to prevent issues when a library is
+ compiled with a different ``-std`` option than the client code (which is not
+ recommended).
+ */
+template <typename Char> class basic_string_view {
+ private:
+ const Char* data_;
+ size_t size_;
+
+ public:
+ using value_type = Char;
+ using iterator = const Char*;
+
+ constexpr basic_string_view() FMT_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) {}
+
+ /**
+ \rst
+ Constructs a string reference object from a C string computing
+ the size with ``std::char_traits<Char>::length``.
+ \endrst
+ */
+#if __cplusplus >= 201703L // C++17's char_traits::length() is constexpr.
+ FMT_CONSTEXPR
+#endif
+ basic_string_view(const Char* s)
+ : data_(s), size_(std::char_traits<Char>::length(s)) {}
+
+ /** 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()) {}
+
+ 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()) {}
+
+ /** Returns a pointer to the string data. */
+ constexpr const Char* data() const { return data_; }
+
+ /** Returns the string size. */
+ constexpr size_t size() const { return size_; }
+
+ constexpr iterator begin() const { return data_; }
+ constexpr iterator end() const { return data_ + size_; }
+
+ constexpr const Char& operator[](size_t pos) const { return data_[pos]; }
+
+ FMT_CONSTEXPR void remove_prefix(size_t n) {
+ data_ += n;
+ size_ -= n;
+ }
+
+ // Lexicographically compare this string reference to other.
+ int compare(basic_string_view other) const {
+ size_t str_size = size_ < other.size_ ? size_ : other.size_;
+ int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
+ if (result == 0)
+ result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+ return result;
+ }
+
+ friend bool operator==(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) == 0;
+ }
+ friend bool operator!=(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) != 0;
+ }
+ friend bool operator<(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) < 0;
+ }
+ friend bool operator<=(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) <= 0;
+ }
+ friend bool operator>(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) > 0;
+ }
+ friend bool operator>=(basic_string_view lhs, basic_string_view rhs) {
+ return lhs.compare(rhs) >= 0;
+ }
+};
+
+using string_view = basic_string_view<char>;
+using wstring_view = basic_string_view<wchar_t>;
+
+/** Specifies if ``T`` is a character type. Can be specialized by users. */
+template <typename T> struct is_char : std::false_type {};
+template <> struct is_char<char> : std::true_type {};
+template <> struct is_char<wchar_t> : std::true_type {};
+template <> struct is_char<detail::char8_type> : std::true_type {};
+template <> struct is_char<char16_t> : std::true_type {};
+template <> struct is_char<char32_t> : std::true_type {};
+
+/**
+ \rst
+ Returns a string view of `s`. In order to add custom string type support to
+ {fmt} provide an overload of `to_string_view` for it in the same namespace as
+ the type for the argument-dependent lookup to work.
+
+ **Example**::
+
+ namespace my_ns {
+ inline string_view to_string_view(const my_string& s) {
+ return {s.data(), s.length()};
+ }
+ }
+ std::string message = fmt::format(my_string("The answer is {}"), 42);
+ \endrst
+ */
+template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
+inline basic_string_view<Char> to_string_view(const Char* s) {
+ return s;
+}
+
+template <typename Char, typename Traits, typename Alloc>
+inline basic_string_view<Char> to_string_view(
+ const std::basic_string<Char, Traits, Alloc>& s) {
+ return s;
+}
+
+template <typename Char>
+inline basic_string_view<Char> 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 basic_string_view<Char> to_string_view(detail::std_string_view<Char> s) {
+ return s;
+}
+
+// A base class for compile-time strings. It is defined in the fmt namespace to
+// make formatting functions visible via ADL, e.g. format(FMT_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 basic_string_view<typename S::char_type> to_string_view(const S& s) {
+ return s;
+}
+
+namespace detail {
+void to_string_view(...);
+using fmt::v7::to_string_view;
+
+// Specifies whether S is a string type convertible to fmt::basic_string_view.
+// It should be a constexpr function but MSVC 2017 fails to compile it in
+// enable_if and MSVC 2015 fails to compile it as an alias template.
+template <typename S>
+struct is_string : std::is_class<decltype(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>> {
+ using result = decltype(to_string_view(std::declval<S>()));
+ 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
+}
+template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
+void check_format_string(S);
+
+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);
+};
+} // namespace detail
+
+/** String's character type. */
+template <typename S> using char_t = typename detail::char_t_impl<S>::type;
+
+/**
+ \rst
+ Parsing context consisting of a format string range being parsed and an
+ argument counter for automatic indexing.
+
+ You can use one of the following type aliases for common character types:
+
+ +-----------------------+-------------------------------------+
+ | Type | Definition |
+ +=======================+=====================================+
+ | format_parse_context | basic_format_parse_context<char> |
+ +-----------------------+-------------------------------------+
+ | wformat_parse_context | basic_format_parse_context<wchar_t> |
+ +-----------------------+-------------------------------------+
+ \endrst
+ */
+template <typename Char, typename ErrorHandler = detail::error_handler>
+class basic_format_parse_context : private ErrorHandler {
+ private:
+ basic_string_view<Char> format_str_;
+ int next_arg_id_;
+
+ public:
+ using char_type = Char;
+ using iterator = typename basic_string_view<Char>::iterator;
+
+ 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) {}
+
+ /**
+ Returns an iterator to the beginning of the format string range being
+ parsed.
+ */
+ constexpr iterator begin() const FMT_NOEXCEPT { return format_str_.begin(); }
+
+ /**
+ Returns an iterator past the end of the format string range being parsed.
+ */
+ constexpr iterator end() const FMT_NOEXCEPT { return format_str_.end(); }
+
+ /** Advances the begin iterator to ``it``. */
+ FMT_CONSTEXPR void advance_to(iterator it) {
+ format_str_.remove_prefix(detail::to_unsigned(it - begin()));
+ }
+
+ /**
+ Reports an error if using the manual argument indexing; otherwise returns
+ the next argument index and switches to the automatic indexing.
+ */
+ FMT_CONSTEXPR int next_arg_id() {
+ // 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;
+ }
+
+ /**
+ Reports an error if using the automatic argument indexing; otherwise
+ switches to the manual indexing.
+ */
+ FMT_CONSTEXPR void check_arg_id(int) {
+ if (next_arg_id_ > 0)
+ on_error("cannot switch from automatic to manual argument indexing");
+ else
+ next_arg_id_ = -1;
+ }
+
+ FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
+
+ FMT_CONSTEXPR void on_error(const char* message) {
+ ErrorHandler::on_error(message);
+ }
+
+ constexpr ErrorHandler error_handler() const { return *this; }
+};
+
+using format_parse_context = basic_format_parse_context<char>;
+using wformat_parse_context = basic_format_parse_context<wchar_t>;
+
+template <typename Context> class basic_format_arg;
+template <typename Context> class basic_format_args;
+template <typename Context> class dynamic_format_arg_store;
+
+// A formatter for objects of type T.
+template <typename T, typename Char = char, typename Enable = void>
+struct formatter {
+ // A deleted default constructor indicates a disabled formatter.
+ formatter() = delete;
+};
+
+// Specifies if T has an enabled formatter specialization. A type can be
+// formattable even if it doesn't have a formatter e.g. via a conversion.
+template <typename T, typename Context>
+using has_formatter =
+ std::is_constructible<typename Context::template formatter_type<T>>;
+
+// Checks whether T is a container with contiguous storage.
+template <typename T> struct is_contiguous : std::false_type {};
+template <typename Char>
+struct is_contiguous<std::basic_string<Char>> : std::true_type {};
+
+namespace detail {
+
+// Extracts a reference to the container from back_insert_iterator.
+template <typename Container>
+inline Container& get_container(std::back_insert_iterator<Container> it) {
+ using bi_iterator = std::back_insert_iterator<Container>;
+ struct accessor : bi_iterator {
+ accessor(bi_iterator iter) : bi_iterator(iter) {}
+ using bi_iterator::container;
+ };
+ return *accessor(it).container;
+}
+
+/**
+ \rst
+ A contiguous memory buffer with an optional growing ability. It is an internal
+ class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`.
+ \endrst
+ */
+template <typename T> class buffer {
+ private:
+ T* ptr_;
+ size_t size_;
+ size_t capacity_;
+
+ protected:
+ // Don't initialize ptr_ since it is not accessed to save a few cycles.
+ FMT_SUPPRESS_MSC_WARNING(26495)
+ buffer(size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}
+
+ buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) FMT_NOEXCEPT
+ : ptr_(p),
+ size_(sz),
+ capacity_(cap) {}
+
+ ~buffer() = default;
+
+ /** Sets the buffer data and capacity. */
+ void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT {
+ ptr_ = buf_data;
+ capacity_ = buf_capacity;
+ }
+
+ /** Increases the buffer capacity to hold at least *capacity* elements. */
+ virtual void grow(size_t capacity) = 0;
+
+ public:
+ using value_type = T;
+ using const_reference = const T&;
+
+ buffer(const buffer&) = delete;
+ void operator=(const buffer&) = delete;
+
+ T* begin() FMT_NOEXCEPT { return ptr_; }
+ T* end() FMT_NOEXCEPT { return ptr_ + size_; }
+
+ const T* begin() const FMT_NOEXCEPT { return ptr_; }
+ const T* end() const FMT_NOEXCEPT { return ptr_ + size_; }
+
+ /** Returns the size of this buffer. */
+ size_t size() const FMT_NOEXCEPT { return size_; }
+
+ /** Returns the capacity of this buffer. */
+ size_t capacity() const FMT_NOEXCEPT { return capacity_; }
+
+ /** Returns a pointer to the buffer data. */
+ T* data() FMT_NOEXCEPT { return ptr_; }
+
+ /** Returns a pointer to the buffer data. */
+ const T* data() const FMT_NOEXCEPT { return ptr_; }
+
+ /** Clears this buffer. */
+ void clear() { size_ = 0; }
+
+ // Tries resizing the buffer to contain *count* elements. If T is a POD type
+ // the new elements may not be initialized.
+ void try_resize(size_t count) {
+ try_reserve(count);
+ size_ = count <= capacity_ ? count : capacity_;
+ }
+
+ // Tries increasing the buffer capacity to *new_capacity*. It can increase the
+ // capacity by a smaller amount than requested but guarantees there is space
+ // for at least one additional element either by increasing the capacity or by
+ // flushing the buffer if it is full.
+ void try_reserve(size_t new_capacity) {
+ if (new_capacity > capacity_) grow(new_capacity);
+ }
+
+ void push_back(const T& value) {
+ try_reserve(size_ + 1);
+ ptr_[size_++] = value;
+ }
+
+ /** Appends data to the end of the buffer. */
+ template <typename U> void append(const U* begin, const U* end);
+
+ template <typename I> T& operator[](I index) { return ptr_[index]; }
+ template <typename I> const T& operator[](I index) const {
+ return ptr_[index];
+ }
+};
+
+struct buffer_traits {
+ explicit buffer_traits(size_t) {}
+ size_t count() const { return 0; }
+ size_t limit(size_t size) { return size; }
+};
+
+class fixed_buffer_traits {
+ private:
+ size_t count_ = 0;
+ size_t limit_;
+
+ public:
+ explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
+ size_t count() const { return count_; }
+ size_t limit(size_t size) {
+ size_t n = limit_ > count_ ? limit_ - count_ : 0;
+ count_ += size;
+ return size < n ? size : n;
+ }
+};
+
+// A buffer that writes to an output iterator when flushed.
+template <typename OutputIt, typename T, typename Traits = buffer_traits>
+class iterator_buffer final : public Traits, public buffer<T> {
+ private:
+ OutputIt out_;
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+
+ protected:
+ void grow(size_t) final FMT_OVERRIDE {
+ if (this->size() == buffer_size) flush();
+ }
+ void flush();
+
+ public:
+ explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
+ : Traits(n),
+ buffer<T>(data_, 0, buffer_size),
+ out_(out) {}
+ ~iterator_buffer() { flush(); }
+
+ OutputIt out() {
+ flush();
+ return out_;
+ }
+ size_t count() const { return Traits::count() + this->size(); }
+};
+
+template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
+ protected:
+ void grow(size_t) final FMT_OVERRIDE {}
+
+ public:
+ explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
+
+ T* out() { return &*this->end(); }
+};
+
+// A buffer that writes to a container with the contiguous storage.
+template <typename Container>
+class iterator_buffer<std::back_insert_iterator<Container>,
+ enable_if_t<is_contiguous<Container>::value,
+ typename Container::value_type>>
+ final : public buffer<typename Container::value_type> {
+ private:
+ Container& container_;
+
+ protected:
+ void grow(size_t capacity) final FMT_OVERRIDE {
+ container_.resize(capacity);
+ this->set(&container_[0], capacity);
+ }
+
+ public:
+ explicit iterator_buffer(Container& c)
+ : 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)) {}
+ std::back_insert_iterator<Container> out() {
+ return std::back_inserter(container_);
+ }
+};
+
+// A buffer that counts the number of code units written discarding the output.
+template <typename T = char> class counting_buffer final : public buffer<T> {
+ private:
+ enum { buffer_size = 256 };
+ T data_[buffer_size];
+ size_t count_ = 0;
+
+ protected:
+ void grow(size_t) final FMT_OVERRIDE {
+ if (this->size() != buffer_size) return;
+ count_ += this->size();
+ this->clear();
+ }
+
+ public:
+ counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
+
+ size_t count() { return count_ + this->size(); }
+};
+
+// An output iterator that appends to the buffer.
+// It is used to reduce symbol sizes for the common case.
+template <typename T>
+class buffer_appender : public std::back_insert_iterator<buffer<T>> {
+ using base = std::back_insert_iterator<buffer<T>>;
+
+ public:
+ explicit buffer_appender(buffer<T>& buf) : base(buf) {}
+ buffer_appender(base it) : base(it) {}
+
+ buffer_appender& operator++() {
+ base::operator++();
+ return *this;
+ }
+
+ buffer_appender operator++(int) {
+ buffer_appender tmp = *this;
+ ++*this;
+ return tmp;
+ }
+};
+
+// Maps an output iterator into a buffer.
+template <typename T, typename OutputIt>
+iterator_buffer<OutputIt, T> get_buffer(OutputIt);
+template <typename T> buffer<T>& get_buffer(buffer_appender<T>);
+
+template <typename OutputIt> OutputIt get_buffer_init(OutputIt out) {
+ return out;
+}
+template <typename T> buffer<T>& get_buffer_init(buffer_appender<T> out) {
+ return get_container(out);
+}
+
+template <typename Buffer>
+auto get_iterator(Buffer& buf) -> decltype(buf.out()) {
+ return buf.out();
+}
+template <typename T> buffer_appender<T> get_iterator(buffer<T>& buf) {
+ return buffer_appender<T>(buf);
+}
+
+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 Context>
+using has_fallback_formatter =
+ std::is_constructible<fallback_formatter<T, typename Context::char_type>>;
+
+struct view {};
+
+template <typename Char, typename T> struct named_arg : view {
+ const Char* name;
+ const T& value;
+ named_arg(const Char* n, const T& v) : name(n), value(v) {}
+};
+
+template <typename Char> struct named_arg_info {
+ const Char* name;
+ int id;
+};
+
+template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
+struct arg_data {
+ // args_[0].named_args points to named_args_ to avoid bloating format_args.
+ // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+ T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
+ named_arg_info<Char> named_args_[NUM_NAMED_ARGS];
+
+ template <typename... U>
+ arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {}
+ arg_data(const arg_data& other) = delete;
+ const T* args() const { return args_ + 1; }
+ named_arg_info<Char>* named_args() { return named_args_; }
+};
+
+template <typename T, typename Char, size_t NUM_ARGS>
+struct arg_data<T, Char, NUM_ARGS, 0> {
+ // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
+ T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];
+
+ template <typename... U>
+ FMT_INLINE arg_data(const U&... init) : args_{init...} {}
+ FMT_INLINE const T* args() const { return args_; }
+ FMT_INLINE std::nullptr_t named_args() { return nullptr; }
+};
+
+template <typename Char>
+inline void init_named_args(named_arg_info<Char>*, int, int) {}
+
+template <typename Char, typename T, typename... Tail>
+void init_named_args(named_arg_info<Char>* named_args, int arg_count,
+ int named_arg_count, const T&, const Tail&... args) {
+ init_named_args(named_args, arg_count + 1, named_arg_count, args...);
+}
+
+template <typename Char, typename T, typename... Tail>
+void init_named_args(named_arg_info<Char>* named_args, int arg_count,
+ int named_arg_count, const named_arg<Char, T>& arg,
+ const Tail&... args) {
+ named_args[named_arg_count++] = {arg.name, arg_count};
+ init_named_args(named_args, arg_count + 1, named_arg_count, args...);
+}
+
+template <typename... Args>
+FMT_INLINE void init_named_args(std::nullptr_t, int, int, const Args&...) {}
+
+template <typename T> struct is_named_arg : std::false_type {};
+
+template <typename T, typename Char>
+struct is_named_arg<named_arg<Char, T>> : std::true_type {};
+
+template <bool B = false> constexpr size_t count() { return B ? 1 : 0; }
+template <bool B1, bool B2, bool... Tail> constexpr size_t count() {
+ return (B1 ? 1 : 0) + count<B2, Tail...>();
+}
+
+template <typename... Args> constexpr size_t count_named_args() {
+ return count<is_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;
+}
+
+template <typename Char> struct string_value {
+ const Char* data;
+ size_t size;
+};
+
+template <typename Char> struct named_arg_value {
+ const named_arg_info<Char>* data;
+ size_t size;
+};
+
+template <typename Context> struct custom_value {
+ using parse_context = typename Context::parse_context_type;
+ const void* value;
+ void (*format)(const void* arg, parse_context& parse_ctx, Context& ctx);
+};
+
+// A formatting argument value.
+template <typename Context> class value {
+ public:
+ using char_type = typename Context::char_type;
+
+ union {
+ int int_value;
+ unsigned uint_value;
+ long long long_long_value;
+ unsigned long long ulong_long_value;
+ int128_t int128_value;
+ uint128_t uint128_value;
+ bool bool_value;
+ char_type char_value;
+ float float_value;
+ double double_value;
+ long double long_double_value;
+ const void* pointer;
+ string_value<char_type> string;
+ custom_value<Context> custom;
+ named_arg_value<char_type> named_args;
+ };
+
+ constexpr FMT_INLINE value(int val = 0) : int_value(val) {}
+ constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
+ FMT_INLINE value(long long val) : long_long_value(val) {}
+ 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(float val) : float_value(val) {}
+ FMT_INLINE value(double val) : double_value(val) {}
+ FMT_INLINE value(long double val) : long_double_value(val) {}
+ FMT_INLINE value(bool val) : bool_value(val) {}
+ FMT_INLINE value(char_type val) : char_value(val) {}
+ FMT_INLINE value(const char_type* val) { string.data = val; }
+ FMT_INLINE value(basic_string_view<char_type> val) {
+ string.data = val.data();
+ string.size = val.size();
+ }
+ FMT_INLINE value(const void* val) : pointer(val) {}
+ FMT_INLINE value(const named_arg_info<char_type>* args, size_t size)
+ : named_args{args, size} {}
+
+ template <typename T> FMT_INLINE value(const T& val) {
+ custom.value = &val;
+ // Get the formatter type through the context to allow different contexts
+ // have different extension points, e.g. `formatter<T>` for `format` and
+ // `printf_formatter<T>` for `printf`.
+ custom.format = format_custom_arg<
+ T, conditional_t<has_formatter<T, Context>::value,
+ typename Context::template formatter_type<T>,
+ fallback_formatter<T, char_type>>>;
+ }
+
+ private:
+ // Formats an argument of a custom type, such as a user-defined class.
+ template <typename T, typename Formatter>
+ static void format_custom_arg(const void* arg,
+ typename Context::parse_context_type& parse_ctx,
+ Context& ctx) {
+ Formatter f;
+ parse_ctx.advance_to(f.parse(parse_ctx));
+ ctx.advance_to(f.format(*static_cast<const T*>(arg), ctx));
+ }
+};
+
+template <typename Context, typename T>
+FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value);
+
+// To minimize the number of types we need to deal with, long is translated
+// either to int or to long long depending on its size.
+enum { long_short = sizeof(long) == sizeof(int) };
+using long_type = conditional_t<long_short, int, long long>;
+using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
+
+struct unformattable {};
+
+// Maps formatting arguments to core types.
+template <typename Context> struct arg_mapper {
+ using char_type = typename Context::char_type;
+
+ FMT_CONSTEXPR int map(signed char val) { return val; }
+ FMT_CONSTEXPR unsigned map(unsigned char val) { return val; }
+ FMT_CONSTEXPR int map(short val) { return val; }
+ FMT_CONSTEXPR unsigned map(unsigned short val) { return val; }
+ FMT_CONSTEXPR int map(int val) { return val; }
+ FMT_CONSTEXPR unsigned map(unsigned val) { return val; }
+ FMT_CONSTEXPR long_type map(long val) { return val; }
+ FMT_CONSTEXPR ulong_type map(unsigned long val) { return val; }
+ FMT_CONSTEXPR long long map(long long val) { return val; }
+ FMT_CONSTEXPR unsigned long long map(unsigned long long val) { return val; }
+ FMT_CONSTEXPR int128_t map(int128_t val) { return val; }
+ FMT_CONSTEXPR uint128_t map(uint128_t val) { return val; }
+ FMT_CONSTEXPR bool map(bool val) { return val; }
+
+ template <typename T, FMT_ENABLE_IF(is_char<T>::value)>
+ FMT_CONSTEXPR char_type map(T val) {
+ static_assert(
+ std::is_same<T, char>::value || std::is_same<T, char_type>::value,
+ "mixing character types is disallowed");
+ return val;
+ }
+
+ FMT_CONSTEXPR float map(float val) { return val; }
+ FMT_CONSTEXPR double map(double val) { return val; }
+ FMT_CONSTEXPR long double map(long double val) { return val; }
+
+ FMT_CONSTEXPR const char_type* map(char_type* val) { return val; }
+ FMT_CONSTEXPR const char_type* map(const char_type* val) { return val; }
+ template <typename T, FMT_ENABLE_IF(is_string<T>::value)>
+ FMT_CONSTEXPR basic_string_view<char_type> map(const T& val) {
+ static_assert(std::is_same<char_type, char_t<T>>::value,
+ "mixing character types is disallowed");
+ return to_string_view(val);
+ }
+ 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, Context>::value)>
+ FMT_CONSTEXPR basic_string_view<char_type> map(const T& val) {
+ 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, Context>::value)>
+ FMT_CONSTEXPR basic_string_view<char_type> map(const T& val) {
+ return std_string_view<char_type>(val);
+ }
+ FMT_CONSTEXPR const char* map(const signed char* val) {
+ static_assert(std::is_same<char_type, char>::value, "invalid string type");
+ return reinterpret_cast<const char*>(val);
+ }
+ FMT_CONSTEXPR const char* map(const unsigned char* val) {
+ static_assert(std::is_same<char_type, char>::value, "invalid string type");
+ return reinterpret_cast<const char*>(val);
+ }
+ FMT_CONSTEXPR const char* map(signed char* val) {
+ const auto* const_val = val;
+ return map(const_val);
+ }
+ FMT_CONSTEXPR const char* map(unsigned char* val) {
+ const auto* const_val = val;
+ return map(const_val);
+ }
+
+ FMT_CONSTEXPR const void* map(void* val) { return val; }
+ FMT_CONSTEXPR const void* map(const void* val) { return val; }
+ FMT_CONSTEXPR const void* map(std::nullptr_t val) { return val; }
+ template <typename T> FMT_CONSTEXPR int map(const T*) {
+ // Formatting of arbitrary pointers is disallowed. If you want to output
+ // a pointer cast it to "void *" or "const void *". In particular, this
+ // forbids formatting of "[const] volatile char *" which is printed as bool
+ // by iostreams.
+ static_assert(!sizeof(T), "formatting of non-void pointers is disallowed");
+ return 0;
+ }
+
+ template <typename T,
+ FMT_ENABLE_IF(std::is_enum<T>::value &&
+ !has_formatter<T, Context>::value &&
+ !has_fallback_formatter<T, Context>::value)>
+ FMT_CONSTEXPR 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));
+ }
+ template <typename T,
+ FMT_ENABLE_IF(!is_string<T>::value && !is_char<T>::value &&
+ (has_formatter<T, Context>::value ||
+ has_fallback_formatter<T, Context>::value))>
+ FMT_CONSTEXPR const T& map(const T& val) {
+ return val;
+ }
+
+ template <typename T>
+ FMT_CONSTEXPR auto map(const named_arg<char_type, T>& val)
+ -> decltype(std::declval<arg_mapper>().map(val.value)) {
+ return map(val.value);
+ }
+
+ unformattable map(...) { return {}; }
+};
+
+// A type constant after applying arg_mapper<Context>.
+template <typename T, typename Context>
+using mapped_type_constant =
+ type_constant<decltype(arg_mapper<Context>().map(std::declval<const T&>())),
+ typename Context::char_type>;
+
+enum { packed_arg_bits = 4 };
+// Maximum number of arguments with packed types.
+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 };
+} // namespace detail
+
+// A formatting argument. It is a trivially copyable/constructible type to
+// allow storage in basic_memory_buffer.
+template <typename Context> class basic_format_arg {
+ private:
+ detail::value<Context> value_;
+ detail::type type_;
+
+ template <typename ContextType, typename T>
+ friend FMT_CONSTEXPR basic_format_arg<ContextType> detail::make_arg(
+ const T& value);
+
+ template <typename Visitor, typename Ctx>
+ friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
+ const basic_format_arg<Ctx>& arg)
+ -> decltype(vis(0));
+
+ friend class basic_format_args<Context>;
+ friend class dynamic_format_arg_store<Context>;
+
+ using char_type = typename Context::char_type;
+
+ template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
+ friend struct detail::arg_data;
+
+ basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
+ : value_(args, size) {}
+
+ public:
+ class handle {
+ public:
+ explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
+
+ void format(typename Context::parse_context_type& parse_ctx,
+ Context& ctx) const {
+ custom_.format(custom_.value, parse_ctx, ctx);
+ }
+
+ private:
+ detail::custom_value<Context> custom_;
+ };
+
+ constexpr basic_format_arg() : type_(detail::type::none_type) {}
+
+ constexpr explicit operator bool() const FMT_NOEXCEPT {
+ return type_ != detail::type::none_type;
+ }
+
+ detail::type type() const { return type_; }
+
+ bool is_integral() const { return detail::is_integral_type(type_); }
+ bool is_arithmetic() const { return detail::is_arithmetic_type(type_); }
+};
+
+/**
+ \rst
+ Visits an argument dispatching to the appropriate visit method based on
+ the argument type. For example, if the argument type is ``double`` then
+ ``vis(value)`` will be called with the value of type ``double``.
+ \endrst
+ */
+template <typename Visitor, typename Context>
+FMT_CONSTEXPR_DECL FMT_INLINE auto visit_format_arg(
+ Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
+ using char_type = typename Context::char_type;
+ switch (arg.type_) {
+ case detail::type::none_type:
+ break;
+ case detail::type::int_type:
+ return vis(arg.value_.int_value);
+ case detail::type::uint_type:
+ return vis(arg.value_.uint_value);
+ case detail::type::long_long_type:
+ return vis(arg.value_.long_long_value);
+ case detail::type::ulong_long_type:
+ return vis(arg.value_.ulong_long_value);
+#if FMT_USE_INT128
+ case detail::type::int128_type:
+ return vis(arg.value_.int128_value);
+ case detail::type::uint128_type:
+ return vis(arg.value_.uint128_value);
+#else
+ case detail::type::int128_type:
+ case detail::type::uint128_type:
+ break;
+#endif
+ case detail::type::bool_type:
+ return vis(arg.value_.bool_value);
+ case detail::type::char_type:
+ return vis(arg.value_.char_value);
+ case detail::type::float_type:
+ return vis(arg.value_.float_value);
+ case detail::type::double_type:
+ return vis(arg.value_.double_value);
+ case detail::type::long_double_type:
+ return vis(arg.value_.long_double_value);
+ case detail::type::cstring_type:
+ return vis(arg.value_.string.data);
+ case detail::type::string_type:
+ return vis(basic_string_view<char_type>(arg.value_.string.data,
+ arg.value_.string.size));
+ case detail::type::pointer_type:
+ return vis(arg.value_.pointer);
+ case detail::type::custom_type:
+ return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
+ }
+ return vis(monostate());
+}
+
+template <typename T> struct formattable : std::false_type {};
+
+namespace detail {
+
+// 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 It, typename T, typename Enable = void>
+struct is_output_iterator : std::false_type {};
+
+template <typename It, typename T>
+struct is_output_iterator<
+ It, T,
+ void_t<typename std::iterator_traits<It>::iterator_category,
+ decltype(*std::declval<It>() = std::declval<T>())>>
+ : std::true_type {};
+
+template <typename OutputIt>
+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>
+struct is_contiguous_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_contiguous_back_insert_iterator<std::back_insert_iterator<Container>>
+ : is_contiguous<Container> {};
+template <typename Char>
+struct is_contiguous_back_insert_iterator<buffer_appender<Char>>
+ : std::true_type {};
+
+// A type-erased reference to an std::locale to avoid heavy <locale> include.
+class locale_ref {
+ private:
+ const void* locale_; // A type-erased pointer to std::locale.
+
+ public:
+ locale_ref() : locale_(nullptr) {}
+ template <typename Locale> explicit locale_ref(const Locale& loc);
+
+ explicit operator bool() const FMT_NOEXCEPT { return locale_ != nullptr; }
+
+ template <typename Locale> Locale get() const;
+};
+
+template <typename> constexpr unsigned long long encode_types() { return 0; }
+
+template <typename Context, typename Arg, typename... Args>
+constexpr unsigned long long encode_types() {
+ return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
+ (encode_types<Context, Args...>() << packed_arg_bits);
+}
+
+template <typename Context, typename T>
+FMT_CONSTEXPR basic_format_arg<Context> make_arg(const T& value) {
+ basic_format_arg<Context> arg;
+ arg.type_ = mapped_type_constant<T, Context>::value;
+ arg.value_ = arg_mapper<Context>().map(value);
+ return arg;
+}
+
+template <typename T> int check(unformattable) {
+ static_assert(
+ formattable<T>(),
+ "Cannot format an argument. To make type T formattable provide a "
+ "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
+ return 0;
+}
+template <typename T, typename U> inline const U& check(const U& val) {
+ return val;
+}
+
+// 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)>
+inline value<Context> make_arg(const T& val) {
+ return check<T>(arg_mapper<Context>().map(val));
+}
+
+template <bool IS_PACKED, typename Context, type, typename T,
+ FMT_ENABLE_IF(!IS_PACKED)>
+inline basic_format_arg<Context> make_arg(const T& value) {
+ return make_arg<Context>(value);
+}
+
+template <typename T> struct is_reference_wrapper : std::false_type {};
+template <typename T>
+struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
+
+template <typename T> const T& unwrap(const T& v) { return v; }
+template <typename T> const T& unwrap(const std::reference_wrapper<T>& v) {
+ return static_cast<const T&>(v);
+}
+
+class dynamic_arg_list {
+ // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
+ // templates it doesn't complain about inability to deduce single translation
+ // unit for placing vtable. So storage_node_base is made a fake template.
+ template <typename = void> struct node {
+ virtual ~node() = default;
+ std::unique_ptr<node<>> next;
+ };
+
+ template <typename T> struct typed_node : node<> {
+ T value;
+
+ template <typename Arg>
+ FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
+
+ template <typename Char>
+ FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
+ : value(arg.data(), arg.size()) {}
+ };
+
+ std::unique_ptr<node<>> head_;
+
+ public:
+ template <typename T, typename Arg> const T& push(const Arg& arg) {
+ auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
+ auto& value = new_node->value;
+ new_node->next = std::move(head_);
+ head_ = std::move(new_node);
+ return value;
+ }
+};
+} // namespace detail
+
+// 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_;
+ detail::locale_ref loc_;
+
+ public:
+ using iterator = OutputIt;
+ using format_arg = basic_format_arg<basic_format_context>;
+ using parse_context_type = basic_format_parse_context<Char>;
+ template <typename T> using formatter_type = formatter<T, char_type>;
+
+ basic_format_context(const basic_format_context&) = delete;
+ void operator=(const basic_format_context&) = delete;
+ /**
+ Constructs a ``basic_format_context`` object. References to the arguments are
+ stored in the object so make sure they have appropriate lifetimes.
+ */
+ basic_format_context(OutputIt out,
+ basic_format_args<basic_format_context> ctx_args,
+ detail::locale_ref loc = detail::locale_ref())
+ : out_(out), args_(ctx_args), loc_(loc) {}
+
+ format_arg arg(int id) const { return args_.get(id); }
+ format_arg arg(basic_string_view<char_type> name) { return args_.get(name); }
+ int arg_id(basic_string_view<char_type> name) { return args_.get_id(name); }
+ const basic_format_args<basic_format_context>& args() const { return args_; }
+
+ detail::error_handler error_handler() { return {}; }
+ void on_error(const char* message) { error_handler().on_error(message); }
+
+ // Returns an iterator to the beginning of the output range.
+ iterator out() { return out_; }
+
+ // Advances the begin iterator to ``it``.
+ void advance_to(iterator it) {
+ if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
+ }
+
+ detail::locale_ref locale() { return loc_; }
+};
+
+template <typename Char>
+using buffer_context =
+ basic_format_context<detail::buffer_appender<Char>, Char>;
+using format_context = buffer_context<char>;
+using wformat_context = buffer_context<wchar_t>;
+
+// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164.
+#define FMT_BUFFER_CONTEXT(Char) \
+ basic_format_context<detail::buffer_appender<Char>, Char>
+
+/**
+ \rst
+ An array of references to arguments. It can be implicitly converted into
+ `~fmt::basic_format_args` for passing into type-erased formatting functions
+ such as `~fmt::vformat`.
+ \endrst
+ */
+template <typename Context, typename... Args>
+class format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+ // Workaround a GCC template argument substitution bug.
+ : public basic_format_args<Context>
+#endif
+{
+ private:
+ static const size_t num_args = sizeof...(Args);
+ static const size_t num_named_args = detail::count_named_args<Args...>();
+ static const bool is_packed = num_args <= detail::max_packed_args;
+
+ using value_type = conditional_t<is_packed, detail::value<Context>,
+ basic_format_arg<Context>>;
+
+ detail::arg_data<value_type, typename Context::char_type, num_args,
+ num_named_args>
+ data_;
+
+ friend class basic_format_args<Context>;
+
+ static constexpr unsigned long long desc =
+ (is_packed ? detail::encode_types<Context, Args...>()
+ : detail::is_unpacked_bit | num_args) |
+ (num_named_args != 0
+ ? static_cast<unsigned long long>(detail::has_named_args_bit)
+ : 0);
+
+ public:
+ format_arg_store(const Args&... args)
+ :
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+ basic_format_args<Context>(*this),
+#endif
+ data_{detail::make_arg<
+ is_packed, Context,
+ detail::mapped_type_constant<Args, Context>::value>(args)...} {
+ detail::init_named_args(data_.named_args(), 0, 0, args...);
+ }
+};
+
+/**
+ \rst
+ Constructs a `~fmt::format_arg_store` object that contains references to
+ arguments and can be implicitly converted to `~fmt::format_args`. `Context`
+ can be omitted in which case it defaults to `~fmt::context`.
+ See `~fmt::arg` for lifetime considerations.
+ \endrst
+ */
+template <typename Context = format_context, typename... Args>
+inline format_arg_store<Context, Args...> make_format_args(
+ const Args&... args) {
+ return {args...};
+}
+
+/**
+ \rst
+ Constructs a `~fmt::format_arg_store` object that contains references
+ to arguments and can be implicitly converted to `~fmt::format_args`.
+ If ``format_str`` 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>>
+inline auto make_args_checked(const S& format_str,
+ 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...>(format_str);
+ return {args...};
+}
+
+/**
+ \rst
+ Returns a named argument to be used in a formatting function. It should only
+ be used in a call to a formatting function.
+
+ **Example**::
+
+ fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
+ \endrst
+ */
+template <typename Char, typename T>
+inline detail::named_arg<Char, T> arg(const Char* name, const T& arg) {
+ static_assert(!detail::is_named_arg<T>(), "nested named arguments");
+ return {name, arg};
+}
+
+/**
+ \rst
+ A dynamic version of `fmt::format_arg_store`.
+ It's equipped with a storage to potentially temporary objects which lifetimes
+ could be shorter than the format arguments object.
+
+ It can be implicitly converted into `~fmt::basic_format_args` for passing
+ into type-erased formatting functions such as `~fmt::vformat`.
+ \endrst
+ */
+template <typename Context>
+class dynamic_format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+ // Workaround a GCC template argument substitution bug.
+ : public basic_format_args<Context>
+#endif
+{
+ private:
+ using char_type = typename Context::char_type;
+
+ template <typename T> struct need_copy {
+ static constexpr detail::type mapped_type =
+ detail::mapped_type_constant<T, Context>::value;
+
+ enum {
+ value = !(detail::is_reference_wrapper<T>::value ||
+ std::is_same<T, basic_string_view<char_type>>::value ||
+ std::is_same<T, detail::std_string_view<char_type>>::value ||
+ (mapped_type != detail::type::cstring_type &&
+ mapped_type != detail::type::string_type &&
+ mapped_type != detail::type::custom_type))
+ };
+ };
+
+ template <typename T>
+ using stored_type = conditional_t<detail::is_string<T>::value,
+ std::basic_string<char_type>, T>;
+
+ // Storage of basic_format_arg must be contiguous.
+ std::vector<basic_format_arg<Context>> data_;
+ std::vector<detail::named_arg_info<char_type>> named_info_;
+
+ // Storage of arguments not fitting into basic_format_arg must grow
+ // without relocation because items in data_ refer to it.
+ detail::dynamic_arg_list dynamic_args_;
+
+ friend class basic_format_args<Context>;
+
+ unsigned long long get_types() const {
+ return detail::is_unpacked_bit | data_.size() |
+ (named_info_.empty()
+ ? 0ULL
+ : static_cast<unsigned long long>(detail::has_named_args_bit));
+ }
+
+ const basic_format_arg<Context>* data() const {
+ return named_info_.empty() ? data_.data() : data_.data() + 1;
+ }
+
+ template <typename T> void emplace_arg(const T& arg) {
+ data_.emplace_back(detail::make_arg<Context>(arg));
+ }
+
+ template <typename T>
+ void emplace_arg(const detail::named_arg<char_type, T>& arg) {
+ if (named_info_.empty()) {
+ constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
+ data_.insert(data_.begin(), {zero_ptr, 0});
+ }
+ data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
+ auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
+ data->pop_back();
+ };
+ std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
+ guard{&data_, pop_one};
+ named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
+ data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
+ guard.release();
+ }
+
+ public:
+ /**
+ \rst
+ Adds an argument into the dynamic store for later passing to a formatting
+ function.
+
+ Note that custom types and string types (but not string views) are copied
+ into the store dynamically allocating memory if necessary.
+
+ **Example**::
+
+ fmt::dynamic_format_arg_store<fmt::format_context> store;
+ store.push_back(42);
+ store.push_back("abc");
+ store.push_back(1.5f);
+ std::string result = fmt::vformat("{} and {} and {}", store);
+ \endrst
+ */
+ template <typename T> void push_back(const T& arg) {
+ if (detail::const_check(need_copy<T>::value))
+ emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
+ else
+ emplace_arg(detail::unwrap(arg));
+ }
+
+ /**
+ \rst
+ Adds a reference to the argument into the dynamic store for later passing to
+ a formatting function. Supports named arguments wrapped in
+ ``std::reference_wrapper`` via ``std::ref()``/``std::cref()``.
+
+ **Example**::
+
+ fmt::dynamic_format_arg_store<fmt::format_context> store;
+ char str[] = "1234567890";
+ store.push_back(std::cref(str));
+ int a1_val{42};
+ auto a1 = fmt::arg("a1_", a1_val);
+ store.push_back(std::cref(a1));
+
+ // Changing str affects the output but only for string and custom types.
+ str[0] = 'X';
+
+ std::string result = fmt::vformat("{} and {a1_}");
+ assert(result == "X234567890 and 42");
+ \endrst
+ */
+ template <typename T> void push_back(std::reference_wrapper<T> arg) {
+ static_assert(
+ detail::is_named_arg<typename std::remove_cv<T>::type>::value ||
+ need_copy<T>::value,
+ "objects of built-in types and string views are always copied");
+ emplace_arg(arg.get());
+ }
+
+ /**
+ Adds named argument into the dynamic store for later passing to a formatting
+ function. ``std::reference_wrapper`` is supported to avoid copying of the
+ argument.
+ */
+ template <typename T>
+ void push_back(const detail::named_arg<char_type, T>& arg) {
+ const char_type* arg_name =
+ dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
+ if (detail::const_check(need_copy<T>::value)) {
+ emplace_arg(
+ fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
+ } else {
+ emplace_arg(fmt::arg(arg_name, arg.value));
+ }
+ }
+
+ /** Erase all elements from the store */
+ void clear() {
+ data_.clear();
+ named_info_.clear();
+ dynamic_args_ = detail::dynamic_arg_list();
+ }
+
+ /**
+ \rst
+ Reserves space to store at least *new_cap* arguments including
+ *new_cap_named* named arguments.
+ \endrst
+ */
+ void reserve(size_t new_cap, size_t new_cap_named) {
+ FMT_ASSERT(new_cap >= new_cap_named,
+ "Set of arguments includes set of named arguments");
+ data_.reserve(new_cap);
+ named_info_.reserve(new_cap_named);
+ }
+};
+
+/**
+ \rst
+ A view of a collection of formatting arguments. To avoid lifetime issues it
+ should only be used as a parameter type in type-erased functions such as
+ ``vformat``::
+
+ void vlog(string_view format_str, format_args args); // OK
+ format_args args = make_format_args(42); // Error: dangling reference
+ \endrst
+ */
+template <typename Context> class basic_format_args {
+ public:
+ using size_type = int;
+ using format_arg = basic_format_arg<Context>;
+
+ private:
+ // A descriptor that contains information about formatting arguments.
+ // If the number of arguments is less or equal to max_packed_args then
+ // argument types are passed in the descriptor. This reduces binary code size
+ // per formatting function call.
+ unsigned long long desc_;
+ union {
+ // If is_packed() returns true then argument values are stored in values_;
+ // otherwise they are stored in args_. This is done to improve cache
+ // locality and reduce compiled code size since storing larger objects
+ // may require more code (at least on x86-64) even if the same amount of
+ // data is actually copied to stack. It saves ~10% on the bloat test.
+ const detail::value<Context>* values_;
+ const format_arg* args_;
+ };
+
+ bool is_packed() const { return (desc_ & detail::is_unpacked_bit) == 0; }
+ bool has_named_args() const {
+ return (desc_ & detail::has_named_args_bit) != 0;
+ }
+
+ detail::type type(int index) const {
+ int shift = index * detail::packed_arg_bits;
+ unsigned int mask = (1 << detail::packed_arg_bits) - 1;
+ return static_cast<detail::type>((desc_ >> shift) & mask);
+ }
+
+ basic_format_args(unsigned long long desc,
+ const detail::value<Context>* values)
+ : desc_(desc), values_(values) {}
+ basic_format_args(unsigned long long desc, const format_arg* args)
+ : desc_(desc), args_(args) {}
+
+ public:
+ basic_format_args() : desc_(0) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
+ \endrst
+ */
+ template <typename... Args>
+ FMT_INLINE basic_format_args(const format_arg_store<Context, Args...>& store)
+ : basic_format_args(store.desc, store.data_.args()) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from
+ `~fmt::dynamic_format_arg_store`.
+ \endrst
+ */
+ FMT_INLINE basic_format_args(const dynamic_format_arg_store<Context>& store)
+ : basic_format_args(store.get_types(), store.data()) {}
+
+ /**
+ \rst
+ Constructs a `basic_format_args` object from a dynamic set of arguments.
+ \endrst
+ */
+ basic_format_args(const format_arg* args, int count)
+ : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count),
+ args) {}
+
+ /** Returns the argument with the specified id. */
+ format_arg get(int id) const {
+ format_arg arg;
+ if (!is_packed()) {
+ if (id < max_size()) arg = args_[id];
+ return arg;
+ }
+ if (id >= detail::max_packed_args) return arg;
+ arg.type_ = type(id);
+ if (arg.type_ == detail::type::none_type) return arg;
+ arg.value_ = values_[id];
+ return arg;
+ }
+
+ template <typename Char> format_arg get(basic_string_view<Char> name) const {
+ int id = get_id(name);
+ return id >= 0 ? get(id) : format_arg();
+ }
+
+ template <typename Char> int get_id(basic_string_view<Char> name) const {
+ if (!has_named_args()) return -1;
+ const auto& named_args =
+ (is_packed() ? values_[-1] : args_[-1].value_).named_args;
+ for (size_t i = 0; i < named_args.size; ++i) {
+ if (named_args.data[i].name == name) return named_args.data[i].id;
+ }
+ return -1;
+ }
+
+ int max_size() const {
+ unsigned long long max_packed = detail::max_packed_args;
+ return static_cast<int>(is_packed() ? max_packed
+ : desc_ & ~detail::is_unpacked_bit);
+ }
+};
+
+#ifdef FMT_ARM_ABI_COMPATIBILITY
+/** An alias to ``basic_format_args<format_context>``. */
+// Separate types would result in shorter symbols but break ABI compatibility
+// between clang and gcc on ARM (#1919).
+using format_args = basic_format_args<format_context>;
+using wformat_args = basic_format_args<wformat_context>;
+#else
+// DEPRECATED! These are kept for ABI compatibility.
+// It is a separate type rather than an alias to make symbols readable.
+struct format_args : basic_format_args<format_context> {
+ template <typename... Args>
+ FMT_INLINE format_args(const Args&... args) : basic_format_args(args...) {}
+};
+struct wformat_args : basic_format_args<wformat_context> {
+ using basic_format_args::basic_format_args;
+};
+#endif
+
+namespace detail {
+
+template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+std::basic_string<Char> vformat(
+ basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args);
+
+FMT_API std::string vformat(string_view format_str, format_args args);
+
+template <typename Char>
+void vformat_to(
+ buffer<Char>& buf, basic_string_view<Char> format_str,
+ basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
+ detail::locale_ref loc = {});
+
+template <typename Char, typename Args,
+ FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+inline void vprint_mojibake(std::FILE*, basic_string_view<Char>, const Args&) {}
+
+FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
+#ifndef _WIN32
+inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
+#endif
+} // namespace detail
+
+/** Formats a string and writes the output to ``out``. */
+// GCC 8 and earlier cannot handle std::back_insert_iterator<Container> with
+// vformat_to<ArgFormatter>(...) overload, so SFINAE on iterator type instead.
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+ bool enable = detail::is_output_iterator<OutputIt, Char>::value>
+auto vformat_to(OutputIt out, const S& format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args)
+ -> typename std::enable_if<enable, OutputIt>::type {
+ decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
+ detail::vformat_to(buf, to_string_view(format_str), args);
+ return detail::get_iterator(buf);
+}
+
+/**
+ \rst
+ Formats arguments, writes the result to the output iterator ``out`` and returns
+ the iterator past the end of the output range.
+
+ **Example**::
+
+ std::vector<char> out;
+ fmt::format_to(std::back_inserter(out), "{}", 42);
+ \endrst
+ */
+// We cannot use FMT_ENABLE_IF because of a bug in gcc 8.3.
+template <typename OutputIt, typename S, typename... Args,
+ bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value>
+inline auto format_to(OutputIt out, const S& format_str, Args&&... args) ->
+ typename std::enable_if<enable, OutputIt>::type {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ return vformat_to(out, to_string_view(format_str), vargs);
+}
+
+template <typename OutputIt> struct format_to_n_result {
+ /** Iterator past the end of the output range. */
+ OutputIt out;
+ /** Total (not truncated) output size. */
+ size_t size;
+};
+
+template <typename OutputIt, typename Char, typename... Args,
+ FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+inline format_to_n_result<OutputIt> vformat_to_n(
+ OutputIt out, size_t n, basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
+ n);
+ detail::vformat_to(buf, format_str, args);
+ return {buf.out(), buf.count()};
+}
+
+/**
+ \rst
+ Formats arguments, writes up to ``n`` characters of the result to the output
+ iterator ``out`` and returns the total output size and the iterator past the
+ end of the output range.
+ \endrst
+ */
+template <typename OutputIt, typename S, typename... Args,
+ bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value>
+inline auto format_to_n(OutputIt out, size_t n, const S& format_str,
+ const Args&... args) ->
+ typename std::enable_if<enable, format_to_n_result<OutputIt>>::type {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ return vformat_to_n(out, n, to_string_view(format_str), vargs);
+}
+
+/**
+ Returns the number of characters in the output of
+ ``format(format_str, args...)``.
+ */
+template <typename... Args>
+inline size_t formatted_size(string_view format_str, Args&&... args) {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ detail::counting_buffer<> buf;
+ detail::vformat_to(buf, format_str, vargs);
+ return buf.count();
+}
+
+template <typename S, typename Char = char_t<S>>
+FMT_INLINE std::basic_string<Char> vformat(
+ const S& format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ return detail::vformat(to_string_view(format_str), args);
+}
+
+/**
+ \rst
+ Formats arguments and returns the result as a string.
+
+ **Example**::
+
+ #include <fmt/core.h>
+ std::string message = fmt::format("The answer is {}", 42);
+ \endrst
+*/
+// Pass char_t as a default template parameter instead of using
+// std::basic_string<char_t<S>> to reduce the symbol size.
+template <typename S, typename... Args, typename Char = char_t<S>>
+FMT_INLINE std::basic_string<Char> format(const S& format_str, Args&&... args) {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ return detail::vformat(to_string_view(format_str), vargs);
+}
+
+FMT_API void vprint(string_view, format_args);
+FMT_API void vprint(std::FILE*, string_view, format_args);
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``format_str`` and writes the
+ output to the file ``f``. Strings are assumed to be Unicode-encoded unless the
+ ``FMT_UNICODE`` macro is set to 0.
+
+ **Example**::
+
+ fmt::print(stderr, "Don't {}!", "panic");
+ \endrst
+ */
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline void print(std::FILE* f, const S& format_str, Args&&... args) {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ return detail::is_unicode<Char>()
+ ? vprint(f, to_string_view(format_str), vargs)
+ : detail::vprint_mojibake(f, to_string_view(format_str), vargs);
+}
+
+/**
+ \rst
+ Formats ``args`` according to specifications in ``format_str`` and writes
+ the output to ``stdout``. Strings are assumed to be Unicode-encoded unless
+ the ``FMT_UNICODE`` macro is set to 0.
+
+ **Example**::
+
+ fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
+ \endrst
+ */
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline void print(const S& format_str, Args&&... args) {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ return detail::is_unicode<Char>()
+ ? vprint(to_string_view(format_str), vargs)
+ : detail::vprint_mojibake(stdout, to_string_view(format_str),
+ vargs);
+}
+FMT_END_NAMESPACE
+
+#endif // FMT_CORE_H_
diff --git a/src/3rdparty/fmt/format-inl.h b/src/3rdparty/fmt/format-inl.h
new file mode 100644
index 000000000..8f2fe7354
--- /dev/null
+++ b/src/3rdparty/fmt/format-inl.h
@@ -0,0 +1,2801 @@
+// Formatting library for C++ - implementation
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_FORMAT_INL_H_
+#define FMT_FORMAT_INL_H_
+
+#include <cassert>
+#include <cctype>
+#include <climits>
+#include <cmath>
+#include <cstdarg>
+#include <cstring> // std::memmove
+#include <cwchar>
+#include <exception>
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+# include <locale>
+#endif
+
+#ifdef _WIN32
+# include <io.h> // _isatty
+#endif
+
+#include "format.h"
+
+// Dummy implementations of strerror_r and strerror_s called if corresponding
+// system functions are not available.
+inline fmt::detail::null<> strerror_r(int, char*, ...) { return {}; }
+inline fmt::detail::null<> strerror_s(char*, size_t, ...) { return {}; }
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
+ // Use unchecked std::fprintf to avoid triggering another assertion when
+ // writing to stderr fails
+ std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
+ // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
+ // code pass.
+ std::terminate();
+}
+
+#ifndef _MSC_VER
+# define FMT_SNPRINTF snprintf
+#else // _MSC_VER
+inline int fmt_snprintf(char* buffer, size_t size, const char* format, ...) {
+ va_list args;
+ va_start(args, format);
+ int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
+ va_end(args);
+ return result;
+}
+# define FMT_SNPRINTF fmt_snprintf
+#endif // _MSC_VER
+
+// A portable thread-safe version of strerror.
+// Sets buffer to point to a string describing the error code.
+// This can be either a pointer to a string stored in buffer,
+// or a pointer to some static immutable string.
+// Returns one of the following values:
+// 0 - success
+// ERANGE - buffer is not large enough to store the error message
+// other - failure
+// Buffer should be at least of size 1.
+inline int safe_strerror(int error_code, char*& buffer,
+ size_t buffer_size) FMT_NOEXCEPT {
+ FMT_ASSERT(buffer != nullptr && buffer_size != 0, "invalid buffer");
+
+ class dispatcher {
+ private:
+ int error_code_;
+ char*& buffer_;
+ size_t buffer_size_;
+
+ // A noop assignment operator to avoid bogus warnings.
+ void operator=(const dispatcher&) {}
+
+ // Handle the result of XSI-compliant version of strerror_r.
+ int handle(int result) {
+ // glibc versions before 2.13 return result in errno.
+ return result == -1 ? errno : result;
+ }
+
+ // Handle the result of GNU-specific version of strerror_r.
+ FMT_MAYBE_UNUSED
+ int handle(char* message) {
+ // If the buffer is full then the message is probably truncated.
+ if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1)
+ return ERANGE;
+ buffer_ = message;
+ return 0;
+ }
+
+ // Handle the case when strerror_r is not available.
+ FMT_MAYBE_UNUSED
+ int handle(detail::null<>) {
+ return fallback(strerror_s(buffer_, buffer_size_, error_code_));
+ }
+
+ // Fallback to strerror_s when strerror_r is not available.
+ FMT_MAYBE_UNUSED
+ int fallback(int result) {
+ // If the buffer is full then the message is probably truncated.
+ return result == 0 && strlen(buffer_) == buffer_size_ - 1 ? ERANGE
+ : result;
+ }
+
+#if !FMT_MSC_VER
+ // Fallback to strerror if strerror_r and strerror_s are not available.
+ int fallback(detail::null<>) {
+ errno = 0;
+ buffer_ = strerror(error_code_);
+ return errno;
+ }
+#endif
+
+ public:
+ dispatcher(int err_code, char*& buf, size_t buf_size)
+ : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
+
+ int run() { return handle(strerror_r(error_code_, buffer_, buffer_size_)); }
+ };
+ return dispatcher(error_code, buffer, buffer_size).run();
+}
+
+FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
+ string_view message) FMT_NOEXCEPT {
+ // Report error code making sure that the output fits into
+ // inline_buffer_size to avoid dynamic memory allocation and potential
+ // bad_alloc.
+ out.try_resize(0);
+ static const char SEP[] = ": ";
+ static const char ERROR_STR[] = "error ";
+ // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
+ size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
+ auto abs_value = static_cast<uint32_or_64_or_128_t<int>>(error_code);
+ if (detail::is_negative(error_code)) {
+ abs_value = 0 - abs_value;
+ ++error_code_size;
+ }
+ error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
+ auto it = buffer_appender<char>(out);
+ if (message.size() <= inline_buffer_size - error_code_size)
+ format_to(it, "{}{}", message, SEP);
+ format_to(it, "{}{}", ERROR_STR, error_code);
+ assert(out.size() <= inline_buffer_size);
+}
+
+FMT_FUNC void report_error(format_func func, int error_code,
+ string_view message) FMT_NOEXCEPT {
+ memory_buffer full_message;
+ func(full_message, error_code, message);
+ // Don't use fwrite_fully because the latter may throw.
+ (void)std::fwrite(full_message.data(), full_message.size(), 1, stderr);
+ std::fputc('\n', stderr);
+}
+
+// A wrapper around fwrite that throws on error.
+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"));
+}
+} // namespace detail
+
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+namespace detail {
+
+template <typename Locale>
+locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
+ static_assert(std::is_same<Locale, std::locale>::value, "");
+}
+
+template <typename Locale> Locale locale_ref::get() const {
+ static_assert(std::is_same<Locale, std::locale>::value, "");
+ return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
+}
+
+template <typename Char> FMT_FUNC std::string grouping_impl(locale_ref loc) {
+ return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>()).grouping();
+}
+template <typename Char> FMT_FUNC Char thousands_sep_impl(locale_ref loc) {
+ return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
+ .thousands_sep();
+}
+template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref loc) {
+ return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
+ .decimal_point();
+}
+} // namespace detail
+#else
+template <typename Char>
+FMT_FUNC std::string detail::grouping_impl(locale_ref) {
+ return "\03";
+}
+template <typename Char> FMT_FUNC Char detail::thousands_sep_impl(locale_ref) {
+ return FMT_STATIC_THOUSANDS_SEPARATOR;
+}
+template <typename Char> FMT_FUNC Char detail::decimal_point_impl(locale_ref) {
+ return '.';
+}
+#endif
+
+FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT = default;
+FMT_API FMT_FUNC system_error::~system_error() FMT_NOEXCEPT = default;
+
+FMT_FUNC void system_error::init(int err_code, string_view format_str,
+ format_args args) {
+ error_code_ = err_code;
+ memory_buffer buffer;
+ format_system_error(buffer, err_code, vformat(format_str, args));
+ std::runtime_error& base = *this;
+ base = std::runtime_error(to_string(buffer));
+}
+
+namespace 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 T>
+const typename basic_data<T>::digit_pair basic_data<T>::digits[] = {
+ {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'}, {'0', '5'},
+ {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'}, {'1', '0'}, {'1', '1'},
+ {'1', '2'}, {'1', '3'}, {'1', '4'}, {'1', '5'}, {'1', '6'}, {'1', '7'},
+ {'1', '8'}, {'1', '9'}, {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'},
+ {'2', '4'}, {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'},
+ {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'}, {'3', '5'},
+ {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'}, {'4', '0'}, {'4', '1'},
+ {'4', '2'}, {'4', '3'}, {'4', '4'}, {'4', '5'}, {'4', '6'}, {'4', '7'},
+ {'4', '8'}, {'4', '9'}, {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'},
+ {'5', '4'}, {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'},
+ {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'}, {'6', '5'},
+ {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'}, {'7', '0'}, {'7', '1'},
+ {'7', '2'}, {'7', '3'}, {'7', '4'}, {'7', '5'}, {'7', '6'}, {'7', '7'},
+ {'7', '8'}, {'7', '9'}, {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'},
+ {'8', '4'}, {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'},
+ {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'}, {'9', '5'},
+ {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'}};
+
+template <typename T>
+const char basic_data<T>::hex_digits[] = "0123456789abcdef";
+
+#define FMT_POWERS_OF_10(factor) \
+ factor * 10, (factor)*100, (factor)*1000, (factor)*10000, (factor)*100000, \
+ (factor)*1000000, (factor)*10000000, (factor)*100000000, \
+ (factor)*1000000000
+
+template <typename T>
+const uint64_t basic_data<T>::powers_of_10_64[] = {
+ 1, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ULL),
+ 10000000000000000000ULL};
+
+template <typename T>
+const uint32_t basic_data<T>::zero_or_powers_of_10_32[] = {0,
+ FMT_POWERS_OF_10(1)};
+template <typename T>
+const uint64_t basic_data<T>::zero_or_powers_of_10_64[] = {
+ 0, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ULL),
+ 10000000000000000000ULL};
+
+template <typename T>
+const uint32_t basic_data<T>::zero_or_powers_of_10_32_new[] = {
+ 0, 0, FMT_POWERS_OF_10(1)};
+
+template <typename T>
+const uint64_t basic_data<T>::zero_or_powers_of_10_64_new[] = {
+ 0, 0, FMT_POWERS_OF_10(1), FMT_POWERS_OF_10(1000000000ULL),
+ 10000000000000000000ULL};
+
+// Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
+// These are generated by support/compute-powers.py.
+template <typename T>
+const uint64_t basic_data<T>::grisu_pow10_significands[] = {
+ 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
+ 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
+ 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
+ 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
+ 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
+ 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
+ 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
+ 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
+ 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
+ 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
+ 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
+ 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
+ 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
+ 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
+ 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
+ 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
+ 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
+ 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
+ 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
+ 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
+ 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
+ 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
+ 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
+ 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
+ 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
+ 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
+ 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
+ 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
+ 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
+};
+
+// Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
+// to significands above.
+template <typename T>
+const int16_t basic_data<T>::grisu_pow10_exponents[] = {
+ -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
+ -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661,
+ -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369,
+ -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77,
+ -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216,
+ 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508,
+ 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800,
+ 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066};
+
+template <typename T>
+const divtest_table_entry<uint32_t> basic_data<T>::divtest_table_for_pow5_32[] =
+ {{0x00000001, 0xffffffff}, {0xcccccccd, 0x33333333},
+ {0xc28f5c29, 0x0a3d70a3}, {0x26e978d5, 0x020c49ba},
+ {0x3afb7e91, 0x0068db8b}, {0x0bcbe61d, 0x0014f8b5},
+ {0x68c26139, 0x000431bd}, {0xae8d46a5, 0x0000d6bf},
+ {0x22e90e21, 0x00002af3}, {0x3a2e9c6d, 0x00000897},
+ {0x3ed61f49, 0x000001b7}};
+
+template <typename T>
+const divtest_table_entry<uint64_t> basic_data<T>::divtest_table_for_pow5_64[] =
+ {{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}};
+
+template <typename T>
+const uint64_t basic_data<T>::dragonbox_pow10_significands_64[] = {
+ 0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f,
+ 0xfd87b5f28300ca0e, 0x9e74d1b791e07e49, 0xc612062576589ddb,
+ 0xf79687aed3eec552, 0x9abe14cd44753b53, 0xc16d9a0095928a28,
+ 0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb,
+ 0xec1e4a7db69561a6, 0x9392ee8e921d5d08, 0xb877aa3236a4b44a,
+ 0xe69594bec44de15c, 0x901d7cf73ab0acda, 0xb424dc35095cd810,
+ 0xe12e13424bb40e14, 0x8cbccc096f5088cc, 0xafebff0bcb24aaff,
+ 0xdbe6fecebdedd5bf, 0x89705f4136b4a598, 0xabcc77118461cefd,
+ 0xd6bf94d5e57a42bd, 0x8637bd05af6c69b6, 0xa7c5ac471b478424,
+ 0xd1b71758e219652c, 0x83126e978d4fdf3c, 0xa3d70a3d70a3d70b,
+ 0xcccccccccccccccd, 0x8000000000000000, 0xa000000000000000,
+ 0xc800000000000000, 0xfa00000000000000, 0x9c40000000000000,
+ 0xc350000000000000, 0xf424000000000000, 0x9896800000000000,
+ 0xbebc200000000000, 0xee6b280000000000, 0x9502f90000000000,
+ 0xba43b74000000000, 0xe8d4a51000000000, 0x9184e72a00000000,
+ 0xb5e620f480000000, 0xe35fa931a0000000, 0x8e1bc9bf04000000,
+ 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};
+
+template <typename T>
+const uint128_wrapper basic_data<T>::dragonbox_pow10_significands_128[] = {
+#if FMT_USE_FULL_CACHE_DRAGONBOX
+ {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
+ {0x9faacf3df73609b1, 0x77b191618c54e9ad},
+ {0xc795830d75038c1d, 0xd59df5b9ef6a2418},
+ {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e},
+ {0x9becce62836ac577, 0x4ee367f9430aec33},
+ {0xc2e801fb244576d5, 0x229c41f793cda740},
+ {0xf3a20279ed56d48a, 0x6b43527578c11110},
+ {0x9845418c345644d6, 0x830a13896b78aaaa},
+ {0xbe5691ef416bd60c, 0x23cc986bc656d554},
+ {0xedec366b11c6cb8f, 0x2cbfbe86b7ec8aa9},
+ {0x94b3a202eb1c3f39, 0x7bf7d71432f3d6aa},
+ {0xb9e08a83a5e34f07, 0xdaf5ccd93fb0cc54},
+ {0xe858ad248f5c22c9, 0xd1b3400f8f9cff69},
+ {0x91376c36d99995be, 0x23100809b9c21fa2},
+ {0xb58547448ffffb2d, 0xabd40a0c2832a78b},
+ {0xe2e69915b3fff9f9, 0x16c90c8f323f516d},
+ {0x8dd01fad907ffc3b, 0xae3da7d97f6792e4},
+ {0xb1442798f49ffb4a, 0x99cd11cfdf41779d},
+ {0xdd95317f31c7fa1d, 0x40405643d711d584},
+ {0x8a7d3eef7f1cfc52, 0x482835ea666b2573},
+ {0xad1c8eab5ee43b66, 0xda3243650005eed0},
+ {0xd863b256369d4a40, 0x90bed43e40076a83},
+ {0x873e4f75e2224e68, 0x5a7744a6e804a292},
+ {0xa90de3535aaae202, 0x711515d0a205cb37},
+ {0xd3515c2831559a83, 0x0d5a5b44ca873e04},
+ {0x8412d9991ed58091, 0xe858790afe9486c3},
+ {0xa5178fff668ae0b6, 0x626e974dbe39a873},
+ {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
+ {0x80fa687f881c7f8e, 0x7ce66634bc9d0b9a},
+ {0xa139029f6a239f72, 0x1c1fffc1ebc44e81},
+ {0xc987434744ac874e, 0xa327ffb266b56221},
+ {0xfbe9141915d7a922, 0x4bf1ff9f0062baa9},
+ {0x9d71ac8fada6c9b5, 0x6f773fc3603db4aa},
+ {0xc4ce17b399107c22, 0xcb550fb4384d21d4},
+ {0xf6019da07f549b2b, 0x7e2a53a146606a49},
+ {0x99c102844f94e0fb, 0x2eda7444cbfc426e},
+ {0xc0314325637a1939, 0xfa911155fefb5309},
+ {0xf03d93eebc589f88, 0x793555ab7eba27cb},
+ {0x96267c7535b763b5, 0x4bc1558b2f3458df},
+ {0xbbb01b9283253ca2, 0x9eb1aaedfb016f17},
+ {0xea9c227723ee8bcb, 0x465e15a979c1cadd},
+ {0x92a1958a7675175f, 0x0bfacd89ec191eca},
+ {0xb749faed14125d36, 0xcef980ec671f667c},
+ {0xe51c79a85916f484, 0x82b7e12780e7401b},
+ {0x8f31cc0937ae58d2, 0xd1b2ecb8b0908811},
+ {0xb2fe3f0b8599ef07, 0x861fa7e6dcb4aa16},
+ {0xdfbdcece67006ac9, 0x67a791e093e1d49b},
+ {0x8bd6a141006042bd, 0xe0c8bb2c5c6d24e1},
+ {0xaecc49914078536d, 0x58fae9f773886e19},
+ {0xda7f5bf590966848, 0xaf39a475506a899f},
+ {0x888f99797a5e012d, 0x6d8406c952429604},
+ {0xaab37fd7d8f58178, 0xc8e5087ba6d33b84},
+ {0xd5605fcdcf32e1d6, 0xfb1e4a9a90880a65},
+ {0x855c3be0a17fcd26, 0x5cf2eea09a550680},
+ {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
+ {0xd0601d8efc57b08b, 0xf13b94daf124da27},
+ {0x823c12795db6ce57, 0x76c53d08d6b70859},
+ {0xa2cb1717b52481ed, 0x54768c4b0c64ca6f},
+ {0xcb7ddcdda26da268, 0xa9942f5dcf7dfd0a},
+ {0xfe5d54150b090b02, 0xd3f93b35435d7c4d},
+ {0x9efa548d26e5a6e1, 0xc47bc5014a1a6db0},
+ {0xc6b8e9b0709f109a, 0x359ab6419ca1091c},
+ {0xf867241c8cc6d4c0, 0xc30163d203c94b63},
+ {0x9b407691d7fc44f8, 0x79e0de63425dcf1e},
+ {0xc21094364dfb5636, 0x985915fc12f542e5},
+ {0xf294b943e17a2bc4, 0x3e6f5b7b17b2939e},
+ {0x979cf3ca6cec5b5a, 0xa705992ceecf9c43},
+ {0xbd8430bd08277231, 0x50c6ff782a838354},
+ {0xece53cec4a314ebd, 0xa4f8bf5635246429},
+ {0x940f4613ae5ed136, 0x871b7795e136be9a},
+ {0xb913179899f68584, 0x28e2557b59846e40},
+ {0xe757dd7ec07426e5, 0x331aeada2fe589d0},
+ {0x9096ea6f3848984f, 0x3ff0d2c85def7622},
+ {0xb4bca50b065abe63, 0x0fed077a756b53aa},
+ {0xe1ebce4dc7f16dfb, 0xd3e8495912c62895},
+ {0x8d3360f09cf6e4bd, 0x64712dd7abbbd95d},
+ {0xb080392cc4349dec, 0xbd8d794d96aacfb4},
+ {0xdca04777f541c567, 0xecf0d7a0fc5583a1},
+ {0x89e42caaf9491b60, 0xf41686c49db57245},
+ {0xac5d37d5b79b6239, 0x311c2875c522ced6},
+ {0xd77485cb25823ac7, 0x7d633293366b828c},
+ {0x86a8d39ef77164bc, 0xae5dff9c02033198},
+ {0xa8530886b54dbdeb, 0xd9f57f830283fdfd},
+ {0xd267caa862a12d66, 0xd072df63c324fd7c},
+ {0x8380dea93da4bc60, 0x4247cb9e59f71e6e},
+ {0xa46116538d0deb78, 0x52d9be85f074e609},
+ {0xcd795be870516656, 0x67902e276c921f8c},
+ {0x806bd9714632dff6, 0x00ba1cd8a3db53b7},
+ {0xa086cfcd97bf97f3, 0x80e8a40eccd228a5},
+ {0xc8a883c0fdaf7df0, 0x6122cd128006b2ce},
+ {0xfad2a4b13d1b5d6c, 0x796b805720085f82},
+ {0x9cc3a6eec6311a63, 0xcbe3303674053bb1},
+ {0xc3f490aa77bd60fc, 0xbedbfc4411068a9d},
+ {0xf4f1b4d515acb93b, 0xee92fb5515482d45},
+ {0x991711052d8bf3c5, 0x751bdd152d4d1c4b},
+ {0xbf5cd54678eef0b6, 0xd262d45a78a0635e},
+ {0xef340a98172aace4, 0x86fb897116c87c35},
+ {0x9580869f0e7aac0e, 0xd45d35e6ae3d4da1},
+ {0xbae0a846d2195712, 0x8974836059cca10a},
+ {0xe998d258869facd7, 0x2bd1a438703fc94c},
+ {0x91ff83775423cc06, 0x7b6306a34627ddd0},
+ {0xb67f6455292cbf08, 0x1a3bc84c17b1d543},
+ {0xe41f3d6a7377eeca, 0x20caba5f1d9e4a94},
+ {0x8e938662882af53e, 0x547eb47b7282ee9d},
+ {0xb23867fb2a35b28d, 0xe99e619a4f23aa44},
+ {0xdec681f9f4c31f31, 0x6405fa00e2ec94d5},
+ {0x8b3c113c38f9f37e, 0xde83bc408dd3dd05},
+ {0xae0b158b4738705e, 0x9624ab50b148d446},
+ {0xd98ddaee19068c76, 0x3badd624dd9b0958},
+ {0x87f8a8d4cfa417c9, 0xe54ca5d70a80e5d7},
+ {0xa9f6d30a038d1dbc, 0x5e9fcf4ccd211f4d},
+ {0xd47487cc8470652b, 0x7647c32000696720},
+ {0x84c8d4dfd2c63f3b, 0x29ecd9f40041e074},
+ {0xa5fb0a17c777cf09, 0xf468107100525891},
+ {0xcf79cc9db955c2cc, 0x7182148d4066eeb5},
+ {0x81ac1fe293d599bf, 0xc6f14cd848405531},
+ {0xa21727db38cb002f, 0xb8ada00e5a506a7d},
+ {0xca9cf1d206fdc03b, 0xa6d90811f0e4851d},
+ {0xfd442e4688bd304a, 0x908f4a166d1da664},
+ {0x9e4a9cec15763e2e, 0x9a598e4e043287ff},
+ {0xc5dd44271ad3cdba, 0x40eff1e1853f29fe},
+ {0xf7549530e188c128, 0xd12bee59e68ef47d},
+ {0x9a94dd3e8cf578b9, 0x82bb74f8301958cf},
+ {0xc13a148e3032d6e7, 0xe36a52363c1faf02},
+ {0xf18899b1bc3f8ca1, 0xdc44e6c3cb279ac2},
+ {0x96f5600f15a7b7e5, 0x29ab103a5ef8c0ba},
+ {0xbcb2b812db11a5de, 0x7415d448f6b6f0e8},
+ {0xebdf661791d60f56, 0x111b495b3464ad22},
+ {0x936b9fcebb25c995, 0xcab10dd900beec35},
+ {0xb84687c269ef3bfb, 0x3d5d514f40eea743},
+ {0xe65829b3046b0afa, 0x0cb4a5a3112a5113},
+ {0x8ff71a0fe2c2e6dc, 0x47f0e785eaba72ac},
+ {0xb3f4e093db73a093, 0x59ed216765690f57},
+ {0xe0f218b8d25088b8, 0x306869c13ec3532d},
+ {0x8c974f7383725573, 0x1e414218c73a13fc},
+ {0xafbd2350644eeacf, 0xe5d1929ef90898fb},
+ {0xdbac6c247d62a583, 0xdf45f746b74abf3a},
+ {0x894bc396ce5da772, 0x6b8bba8c328eb784},
+ {0xab9eb47c81f5114f, 0x066ea92f3f326565},
+ {0xd686619ba27255a2, 0xc80a537b0efefebe},
+ {0x8613fd0145877585, 0xbd06742ce95f5f37},
+ {0xa798fc4196e952e7, 0x2c48113823b73705},
+ {0xd17f3b51fca3a7a0, 0xf75a15862ca504c6},
+ {0x82ef85133de648c4, 0x9a984d73dbe722fc},
+ {0xa3ab66580d5fdaf5, 0xc13e60d0d2e0ebbb},
+ {0xcc963fee10b7d1b3, 0x318df905079926a9},
+ {0xffbbcfe994e5c61f, 0xfdf17746497f7053},
+ {0x9fd561f1fd0f9bd3, 0xfeb6ea8bedefa634},
+ {0xc7caba6e7c5382c8, 0xfe64a52ee96b8fc1},
+ {0xf9bd690a1b68637b, 0x3dfdce7aa3c673b1},
+ {0x9c1661a651213e2d, 0x06bea10ca65c084f},
+ {0xc31bfa0fe5698db8, 0x486e494fcff30a63},
+ {0xf3e2f893dec3f126, 0x5a89dba3c3efccfb},
+ {0x986ddb5c6b3a76b7, 0xf89629465a75e01d},
+ {0xbe89523386091465, 0xf6bbb397f1135824},
+ {0xee2ba6c0678b597f, 0x746aa07ded582e2d},
+ {0x94db483840b717ef, 0xa8c2a44eb4571cdd},
+ {0xba121a4650e4ddeb, 0x92f34d62616ce414},
+ {0xe896a0d7e51e1566, 0x77b020baf9c81d18},
+ {0x915e2486ef32cd60, 0x0ace1474dc1d122f},
+ {0xb5b5ada8aaff80b8, 0x0d819992132456bb},
+ {0xe3231912d5bf60e6, 0x10e1fff697ed6c6a},
+ {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2},
+ {0xb1736b96b6fd83b3, 0xbd308ff8a6b17cb3},
+ {0xddd0467c64bce4a0, 0xac7cb3f6d05ddbdf},
+ {0x8aa22c0dbef60ee4, 0x6bcdf07a423aa96c},
+ {0xad4ab7112eb3929d, 0x86c16c98d2c953c7},
+ {0xd89d64d57a607744, 0xe871c7bf077ba8b8},
+ {0x87625f056c7c4a8b, 0x11471cd764ad4973},
+ {0xa93af6c6c79b5d2d, 0xd598e40d3dd89bd0},
+ {0xd389b47879823479, 0x4aff1d108d4ec2c4},
+ {0x843610cb4bf160cb, 0xcedf722a585139bb},
+ {0xa54394fe1eedb8fe, 0xc2974eb4ee658829},
+ {0xce947a3da6a9273e, 0x733d226229feea33},
+ {0x811ccc668829b887, 0x0806357d5a3f5260},
+ {0xa163ff802a3426a8, 0xca07c2dcb0cf26f8},
+ {0xc9bcff6034c13052, 0xfc89b393dd02f0b6},
+ {0xfc2c3f3841f17c67, 0xbbac2078d443ace3},
+ {0x9d9ba7832936edc0, 0xd54b944b84aa4c0e},
+ {0xc5029163f384a931, 0x0a9e795e65d4df12},
+ {0xf64335bcf065d37d, 0x4d4617b5ff4a16d6},
+ {0x99ea0196163fa42e, 0x504bced1bf8e4e46},
+ {0xc06481fb9bcf8d39, 0xe45ec2862f71e1d7},
+ {0xf07da27a82c37088, 0x5d767327bb4e5a4d},
+ {0x964e858c91ba2655, 0x3a6a07f8d510f870},
+ {0xbbe226efb628afea, 0x890489f70a55368c},
+ {0xeadab0aba3b2dbe5, 0x2b45ac74ccea842f},
+ {0x92c8ae6b464fc96f, 0x3b0b8bc90012929e},
+ {0xb77ada0617e3bbcb, 0x09ce6ebb40173745},
+ {0xe55990879ddcaabd, 0xcc420a6a101d0516},
+ {0x8f57fa54c2a9eab6, 0x9fa946824a12232e},
+ {0xb32df8e9f3546564, 0x47939822dc96abfa},
+ {0xdff9772470297ebd, 0x59787e2b93bc56f8},
+ {0x8bfbea76c619ef36, 0x57eb4edb3c55b65b},
+ {0xaefae51477a06b03, 0xede622920b6b23f2},
+ {0xdab99e59958885c4, 0xe95fab368e45ecee},
+ {0x88b402f7fd75539b, 0x11dbcb0218ebb415},
+ {0xaae103b5fcd2a881, 0xd652bdc29f26a11a},
+ {0xd59944a37c0752a2, 0x4be76d3346f04960},
+ {0x857fcae62d8493a5, 0x6f70a4400c562ddc},
+ {0xa6dfbd9fb8e5b88e, 0xcb4ccd500f6bb953},
+ {0xd097ad07a71f26b2, 0x7e2000a41346a7a8},
+ {0x825ecc24c873782f, 0x8ed400668c0c28c9},
+ {0xa2f67f2dfa90563b, 0x728900802f0f32fb},
+ {0xcbb41ef979346bca, 0x4f2b40a03ad2ffba},
+ {0xfea126b7d78186bc, 0xe2f610c84987bfa9},
+ {0x9f24b832e6b0f436, 0x0dd9ca7d2df4d7ca},
+ {0xc6ede63fa05d3143, 0x91503d1c79720dbc},
+ {0xf8a95fcf88747d94, 0x75a44c6397ce912b},
+ {0x9b69dbe1b548ce7c, 0xc986afbe3ee11abb},
+ {0xc24452da229b021b, 0xfbe85badce996169},
+ {0xf2d56790ab41c2a2, 0xfae27299423fb9c4},
+ {0x97c560ba6b0919a5, 0xdccd879fc967d41b},
+ {0xbdb6b8e905cb600f, 0x5400e987bbc1c921},
+ {0xed246723473e3813, 0x290123e9aab23b69},
+ {0x9436c0760c86e30b, 0xf9a0b6720aaf6522},
+ {0xb94470938fa89bce, 0xf808e40e8d5b3e6a},
+ {0xe7958cb87392c2c2, 0xb60b1d1230b20e05},
+ {0x90bd77f3483bb9b9, 0xb1c6f22b5e6f48c3},
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+ {0x8da471a9de737e24, 0x5ceaecfed289e5d2},
+ {0xb10d8e1456105dad, 0x7425a83e872c5f47},
+ {0xdd50f1996b947518, 0xd12f124e28f77719},
+ {0x8a5296ffe33cc92f, 0x82bd6b70d99aaa6f},
+ {0xace73cbfdc0bfb7b, 0x636cc64d1001550b},
+ {0xd8210befd30efa5a, 0x3c47f7e05401aa4e},
+ {0x8714a775e3e95c78, 0x65acfaec34810a71},
+ {0xa8d9d1535ce3b396, 0x7f1839a741a14d0d},
+ {0xd31045a8341ca07c, 0x1ede48111209a050},
+ {0x83ea2b892091e44d, 0x934aed0aab460432},
+ {0xa4e4b66b68b65d60, 0xf81da84d5617853f},
+ {0xce1de40642e3f4b9, 0x36251260ab9d668e},
+ {0x80d2ae83e9ce78f3, 0xc1d72b7c6b426019},
+ {0xa1075a24e4421730, 0xb24cf65b8612f81f},
+ {0xc94930ae1d529cfc, 0xdee033f26797b627},
+ {0xfb9b7cd9a4a7443c, 0x169840ef017da3b1},
+ {0x9d412e0806e88aa5, 0x8e1f289560ee864e},
+ {0xc491798a08a2ad4e, 0xf1a6f2bab92a27e2},
+ {0xf5b5d7ec8acb58a2, 0xae10af696774b1db},
+ {0x9991a6f3d6bf1765, 0xacca6da1e0a8ef29},
+ {0xbff610b0cc6edd3f, 0x17fd090a58d32af3},
+ {0xeff394dcff8a948e, 0xddfc4b4cef07f5b0},
+ {0x95f83d0a1fb69cd9, 0x4abdaf101564f98e},
+ {0xbb764c4ca7a4440f, 0x9d6d1ad41abe37f1},
+ {0xea53df5fd18d5513, 0x84c86189216dc5ed},
+ {0x92746b9be2f8552c, 0x32fd3cf5b4e49bb4},
+ {0xb7118682dbb66a77, 0x3fbc8c33221dc2a1},
+ {0xe4d5e82392a40515, 0x0fabaf3feaa5334a},
+ {0x8f05b1163ba6832d, 0x29cb4d87f2a7400e},
+ {0xb2c71d5bca9023f8, 0x743e20e9ef511012},
+ {0xdf78e4b2bd342cf6, 0x914da9246b255416},
+ {0x8bab8eefb6409c1a, 0x1ad089b6c2f7548e},
+ {0xae9672aba3d0c320, 0xa184ac2473b529b1},
+ {0xda3c0f568cc4f3e8, 0xc9e5d72d90a2741e},
+ {0x8865899617fb1871, 0x7e2fa67c7a658892},
+ {0xaa7eebfb9df9de8d, 0xddbb901b98feeab7},
+ {0xd51ea6fa85785631, 0x552a74227f3ea565},
+ {0x8533285c936b35de, 0xd53a88958f87275f},
+ {0xa67ff273b8460356, 0x8a892abaf368f137},
+ {0xd01fef10a657842c, 0x2d2b7569b0432d85},
+ {0x8213f56a67f6b29b, 0x9c3b29620e29fc73},
+ {0xa298f2c501f45f42, 0x8349f3ba91b47b8f},
+ {0xcb3f2f7642717713, 0x241c70a936219a73},
+ {0xfe0efb53d30dd4d7, 0xed238cd383aa0110},
+ {0x9ec95d1463e8a506, 0xf4363804324a40aa},
+ {0xc67bb4597ce2ce48, 0xb143c6053edcd0d5},
+ {0xf81aa16fdc1b81da, 0xdd94b7868e94050a},
+ {0x9b10a4e5e9913128, 0xca7cf2b4191c8326},
+ {0xc1d4ce1f63f57d72, 0xfd1c2f611f63a3f0},
+ {0xf24a01a73cf2dccf, 0xbc633b39673c8cec},
+ {0x976e41088617ca01, 0xd5be0503e085d813},
+ {0xbd49d14aa79dbc82, 0x4b2d8644d8a74e18},
+ {0xec9c459d51852ba2, 0xddf8e7d60ed1219e},
+ {0x93e1ab8252f33b45, 0xcabb90e5c942b503},
+ {0xb8da1662e7b00a17, 0x3d6a751f3b936243},
+ {0xe7109bfba19c0c9d, 0x0cc512670a783ad4},
+ {0x906a617d450187e2, 0x27fb2b80668b24c5},
+ {0xb484f9dc9641e9da, 0xb1f9f660802dedf6},
+ {0xe1a63853bbd26451, 0x5e7873f8a0396973},
+ {0x8d07e33455637eb2, 0xdb0b487b6423e1e8},
+ {0xb049dc016abc5e5f, 0x91ce1a9a3d2cda62},
+ {0xdc5c5301c56b75f7, 0x7641a140cc7810fb},
+ {0x89b9b3e11b6329ba, 0xa9e904c87fcb0a9d},
+ {0xac2820d9623bf429, 0x546345fa9fbdcd44},
+ {0xd732290fbacaf133, 0xa97c177947ad4095},
+ {0x867f59a9d4bed6c0, 0x49ed8eabcccc485d},
+ {0xa81f301449ee8c70, 0x5c68f256bfff5a74},
+ {0xd226fc195c6a2f8c, 0x73832eec6fff3111},
+ {0x83585d8fd9c25db7, 0xc831fd53c5ff7eab},
+ {0xa42e74f3d032f525, 0xba3e7ca8b77f5e55},
+ {0xcd3a1230c43fb26f, 0x28ce1bd2e55f35eb},
+ {0x80444b5e7aa7cf85, 0x7980d163cf5b81b3},
+ {0xa0555e361951c366, 0xd7e105bcc332621f},
+ {0xc86ab5c39fa63440, 0x8dd9472bf3fefaa7},
+ {0xfa856334878fc150, 0xb14f98f6f0feb951},
+ {0x9c935e00d4b9d8d2, 0x6ed1bf9a569f33d3},
+ {0xc3b8358109e84f07, 0x0a862f80ec4700c8},
+ {0xf4a642e14c6262c8, 0xcd27bb612758c0fa},
+ {0x98e7e9cccfbd7dbd, 0x8038d51cb897789c},
+ {0xbf21e44003acdd2c, 0xe0470a63e6bd56c3},
+ {0xeeea5d5004981478, 0x1858ccfce06cac74},
+ {0x95527a5202df0ccb, 0x0f37801e0c43ebc8},
+ {0xbaa718e68396cffd, 0xd30560258f54e6ba},
+ {0xe950df20247c83fd, 0x47c6b82ef32a2069},
+ {0x91d28b7416cdd27e, 0x4cdc331d57fa5441},
+ {0xb6472e511c81471d, 0xe0133fe4adf8e952},
+ {0xe3d8f9e563a198e5, 0x58180fddd97723a6},
+ {0x8e679c2f5e44ff8f, 0x570f09eaa7ea7648},
+ {0xb201833b35d63f73, 0x2cd2cc6551e513da},
+ {0xde81e40a034bcf4f, 0xf8077f7ea65e58d1},
+ {0x8b112e86420f6191, 0xfb04afaf27faf782},
+ {0xadd57a27d29339f6, 0x79c5db9af1f9b563},
+ {0xd94ad8b1c7380874, 0x18375281ae7822bc},
+ {0x87cec76f1c830548, 0x8f2293910d0b15b5},
+ {0xa9c2794ae3a3c69a, 0xb2eb3875504ddb22},
+ {0xd433179d9c8cb841, 0x5fa60692a46151eb},
+ {0x849feec281d7f328, 0xdbc7c41ba6bcd333},
+ {0xa5c7ea73224deff3, 0x12b9b522906c0800},
+ {0xcf39e50feae16bef, 0xd768226b34870a00},
+ {0x81842f29f2cce375, 0xe6a1158300d46640},
+ {0xa1e53af46f801c53, 0x60495ae3c1097fd0},
+ {0xca5e89b18b602368, 0x385bb19cb14bdfc4},
+ {0xfcf62c1dee382c42, 0x46729e03dd9ed7b5},
+ {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d1},
+ {0xc5a05277621be293, 0xc7098b7305241885},
+ {0xf70867153aa2db38, 0xb8cbee4fc66d1ea7}
+#else
+ {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
+ {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
+ {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
+ {0x86a8d39ef77164bc, 0xae5dff9c02033198},
+ {0xd98ddaee19068c76, 0x3badd624dd9b0958},
+ {0xafbd2350644eeacf, 0xe5d1929ef90898fb},
+ {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2},
+ {0xe55990879ddcaabd, 0xcc420a6a101d0516},
+ {0xb94470938fa89bce, 0xf808e40e8d5b3e6a},
+ {0x95a8637627989aad, 0xdde7001379a44aa9},
+ {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}
+#endif
+};
+
+#if !FMT_USE_FULL_CACHE_DRAGONBOX
+template <typename T>
+const uint64_t basic_data<T>::powers_of_5_64[] = {
+ 0x0000000000000001, 0x0000000000000005, 0x0000000000000019,
+ 0x000000000000007d, 0x0000000000000271, 0x0000000000000c35,
+ 0x0000000000003d09, 0x000000000001312d, 0x000000000005f5e1,
+ 0x00000000001dcd65, 0x00000000009502f9, 0x0000000002e90edd,
+ 0x000000000e8d4a51, 0x0000000048c27395, 0x000000016bcc41e9,
+ 0x000000071afd498d, 0x0000002386f26fc1, 0x000000b1a2bc2ec5,
+ 0x000003782dace9d9, 0x00001158e460913d, 0x000056bc75e2d631,
+ 0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
+ 0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
+
+template <typename T>
+const uint32_t basic_data<T>::dragonbox_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};
+#endif
+
+template <typename T>
+const char basic_data<T>::foreground_color[] = "\x1b[38;2;";
+template <typename T>
+const char basic_data<T>::background_color[] = "\x1b[48;2;";
+template <typename T> const char basic_data<T>::reset_color[] = "\x1b[0m";
+template <typename T> const wchar_t basic_data<T>::wreset_color[] = L"\x1b[0m";
+template <typename T> const char basic_data<T>::signs[] = {0, '-', '+', ' '};
+template <typename T>
+const char basic_data<T>::left_padding_shifts[] = {31, 31, 0, 1, 0};
+template <typename T>
+const char basic_data<T>::right_padding_shifts[] = {0, 31, 0, 1, 0};
+
+template <typename T> struct bits {
+ static FMT_CONSTEXPR_DECL const int value =
+ static_cast<int>(sizeof(T) * std::numeric_limits<unsigned char>::digits);
+};
+
+class fp;
+template <int SHIFT = 0> fp normalize(fp value);
+
+// Lower (upper) boundary is a value half way between a floating-point value
+// and its predecessor (successor). Boundaries have the same exponent as the
+// value so only significands are stored.
+struct boundaries {
+ uint64_t lower;
+ uint64_t upper;
+};
+
+// A handmade floating-point number f * pow(2, e).
+class fp {
+ private:
+ using significand_type = uint64_t;
+
+ template <typename Float>
+ using is_supported_float = bool_constant<sizeof(Float) == sizeof(uint64_t) ||
+ sizeof(Float) == sizeof(uint32_t)>;
+
+ public:
+ significand_type f;
+ int e;
+
+ // All sizes are in bits.
+ // Subtract 1 to account for an implicit most significant bit in the
+ // normalized form.
+ static FMT_CONSTEXPR_DECL const int double_significand_size =
+ std::numeric_limits<double>::digits - 1;
+ static FMT_CONSTEXPR_DECL const uint64_t implicit_bit =
+ 1ULL << double_significand_size;
+ static FMT_CONSTEXPR_DECL const int significand_size =
+ bits<significand_type>::value;
+
+ fp() : f(0), e(0) {}
+ fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
+
+ // Constructs fp from an IEEE754 double. It is a template to prevent compile
+ // errors on platforms where double is not IEEE754.
+ template <typename Double> explicit fp(Double d) { assign(d); }
+
+ // Assigns d to this and return true iff predecessor is closer than successor.
+ template <typename Float, FMT_ENABLE_IF(is_supported_float<Float>::value)>
+ bool assign(Float d) {
+ // Assume float is in the format [sign][exponent][significand].
+ using limits = std::numeric_limits<Float>;
+ const int float_significand_size = limits::digits - 1;
+ const int exponent_size =
+ bits<Float>::value - float_significand_size - 1; // -1 for sign
+ const uint64_t float_implicit_bit = 1ULL << float_significand_size;
+ const uint64_t significand_mask = float_implicit_bit - 1;
+ const uint64_t exponent_mask = (~0ULL >> 1) & ~significand_mask;
+ const int exponent_bias = (1 << exponent_size) - limits::max_exponent - 1;
+ constexpr bool is_double = sizeof(Float) == sizeof(uint64_t);
+ auto u = bit_cast<conditional_t<is_double, uint64_t, uint32_t>>(d);
+ f = u & significand_mask;
+ int biased_e =
+ static_cast<int>((u & exponent_mask) >> float_significand_size);
+ // Predecessor is closer if d is a normalized power of 2 (f == 0) other than
+ // the smallest normalized number (biased_e > 1).
+ bool is_predecessor_closer = f == 0 && biased_e > 1;
+ if (biased_e != 0)
+ f += float_implicit_bit;
+ else
+ biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
+ e = biased_e - exponent_bias - float_significand_size;
+ return is_predecessor_closer;
+ }
+
+ template <typename Float, FMT_ENABLE_IF(!is_supported_float<Float>::value)>
+ bool assign(Float) {
+ *this = fp();
+ return false;
+ }
+};
+
+// Normalizes the value converted from double and multiplied by (1 << SHIFT).
+template <int SHIFT> fp normalize(fp value) {
+ // Handle subnormals.
+ const auto shifted_implicit_bit = fp::implicit_bit << SHIFT;
+ while ((value.f & shifted_implicit_bit) == 0) {
+ value.f <<= 1;
+ --value.e;
+ }
+ // Subtract 1 to account for hidden bit.
+ const auto offset =
+ fp::significand_size - fp::double_significand_size - SHIFT - 1;
+ value.f <<= offset;
+ value.e -= offset;
+ return value;
+}
+
+inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; }
+
+// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
+inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
+#if FMT_USE_INT128
+ auto product = static_cast<__uint128_t>(lhs) * rhs;
+ auto f = static_cast<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
+}
+
+inline fp operator*(fp x, fp y) { return {multiply(x.f, y.f), x.e + y.e + 64}; }
+
+// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its
+// (binary) exponent satisfies `min_exponent <= c_k.e <= min_exponent + 28`.
+inline fp get_cached_power(int min_exponent, int& pow10_exponent) {
+ const int shift = 32;
+ const auto significand = static_cast<int64_t>(data::log10_2_significand);
+ int index = static_cast<int>(
+ ((min_exponent + fp::significand_size - 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 {data::grisu_pow10_significands[index],
+ data::grisu_pow10_exponents[index]};
+}
+
+// A simple accumulator to hold the sums of terms in bigint::square if uint128_t
+// is not available.
+struct accumulator {
+ uint64_t lower;
+ uint64_t upper;
+
+ accumulator() : lower(0), upper(0) {}
+ explicit operator uint32_t() const { return static_cast<uint32_t>(lower); }
+
+ void operator+=(uint64_t n) {
+ lower += n;
+ if (lower < n) ++upper;
+ }
+ void operator>>=(int shift) {
+ assert(shift == 32);
+ (void)shift;
+ lower = (upper << 32) | (lower >> 32);
+ upper >>= 32;
+ }
+};
+
+class bigint {
+ private:
+ // A bigint is stored as an array of bigits (big digits), with bigit at index
+ // 0 being the least significant one.
+ using bigit = uint32_t;
+ using double_bigit = uint64_t;
+ enum { bigits_capacity = 32 };
+ basic_memory_buffer<bigit, bigits_capacity> bigits_;
+ int exp_;
+
+ bigit operator[](int index) const { return bigits_[to_unsigned(index)]; }
+ bigit& operator[](int index) { return bigits_[to_unsigned(index)]; }
+
+ static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
+
+ friend struct formatter<bigint>;
+
+ 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));
+ }
+
+ 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.
+ void subtract_aligned(const bigint& other) {
+ FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
+ FMT_ASSERT(compare(*this, other) >= 0, "");
+ bigit borrow = 0;
+ int i = other.exp_ - exp_;
+ for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
+ subtract_bigits(i, other.bigits_[j], borrow);
+ while (borrow > 0) subtract_bigits(i, 0, borrow);
+ remove_leading_zeros();
+ }
+
+ void multiply(uint32_t value) {
+ const double_bigit wide_value = value;
+ bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ double_bigit result = bigits_[i] * wide_value + carry;
+ bigits_[i] = static_cast<bigit>(result);
+ carry = static_cast<bigit>(result >> bigit_bits);
+ }
+ if (carry != 0) bigits_.push_back(carry);
+ }
+
+ void multiply(uint64_t value) {
+ const bigit mask = ~bigit(0);
+ const double_bigit lower = value & mask;
+ const double_bigit upper = value >> bigit_bits;
+ double_bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ double_bigit result = bigits_[i] * lower + (carry & mask);
+ carry =
+ bigits_[i] * upper + (result >> bigit_bits) + (carry >> bigit_bits);
+ bigits_[i] = static_cast<bigit>(result);
+ }
+ while (carry != 0) {
+ bigits_.push_back(carry & mask);
+ carry >>= bigit_bits;
+ }
+ }
+
+ public:
+ bigint() : exp_(0) {}
+ explicit bigint(uint64_t n) { assign(n); }
+ ~bigint() { assert(bigits_.capacity() <= bigits_capacity); }
+
+ bigint(const bigint&) = delete;
+ void operator=(const bigint&) = delete;
+
+ void assign(const bigint& other) {
+ 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_;
+ }
+
+ void assign(uint64_t n) {
+ size_t num_bigits = 0;
+ do {
+ bigits_[num_bigits++] = n & ~bigit(0);
+ n >>= bigit_bits;
+ } while (n != 0);
+ bigits_.resize(num_bigits);
+ exp_ = 0;
+ }
+
+ int num_bigits() const { return static_cast<int>(bigits_.size()) + exp_; }
+
+ FMT_NOINLINE bigint& operator<<=(int shift) {
+ assert(shift >= 0);
+ exp_ += shift / bigit_bits;
+ shift %= bigit_bits;
+ if (shift == 0) return *this;
+ bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ bigit c = bigits_[i] >> (bigit_bits - shift);
+ bigits_[i] = (bigits_[i] << shift) + carry;
+ carry = c;
+ }
+ if (carry != 0) bigits_.push_back(carry);
+ return *this;
+ }
+
+ template <typename Int> bigint& operator*=(Int value) {
+ FMT_ASSERT(value > 0, "");
+ multiply(uint32_or_64_or_128_t<Int>(value));
+ return *this;
+ }
+
+ friend int compare(const bigint& lhs, const bigint& rhs) {
+ int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
+ if (num_lhs_bigits != num_rhs_bigits)
+ return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
+ int i = static_cast<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 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.
+ void assign_pow10(int exp) {
+ assert(exp >= 0);
+ if (exp == 0) return assign(1);
+ // Find the top bit.
+ int bitmask = 1;
+ while (exp >= bitmask) bitmask <<= 1;
+ bitmask >>= 1;
+ // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
+ // repeated squaring and multiplication.
+ assign(5);
+ bitmask >>= 1;
+ while (bitmask != 0) {
+ square();
+ if ((exp & bitmask) != 0) *this *= 5;
+ bitmask >>= 1;
+ }
+ *this <<= exp; // Multiply by pow(2, exp) by shifting.
+ }
+
+ void square() {
+ basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
+ int num_bigits = static_cast<int>(bigits_.size());
+ int num_result_bigits = 2 * num_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;
+ }
+ --num_result_bigits;
+ 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.
+ 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.
+ 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.
+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.
+};
+}
+
+// Generates output using the Grisu digit-gen algorithm.
+// error: the size of the region (lower, upper) outside of which numbers
+// definitely do not round to value (Delta in Grisu3).
+template <typename Handler>
+FMT_ALWAYS_INLINE digits::result grisu_gen_digits(fp value, uint64_t error,
+ int& exp, Handler& handler) {
+ const fp one(1ULL << -value.e, value.e);
+ // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be
+ // zero because it contains a product of two 64-bit numbers with MSB set (due
+ // to normalization) - 1, shifted right by at most 60 bits.
+ auto integral = static_cast<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.
+ // Divide by 10 to prevent overflow.
+ auto result = handler.on_start(data::powers_of_10_64[exp - 1] << -one.e,
+ value.f / 10, error * 10, exp);
+ if (result != digits::more) return result;
+ // Generate digits for the integral part. This can produce up to 10 digits.
+ do {
+ uint32_t digit = 0;
+ auto divmod_integral = [&](uint32_t divisor) {
+ digit = integral / divisor;
+ integral %= divisor;
+ };
+ // This optimization by Milo Yip reduces the number of integer divisions by
+ // one per iteration.
+ switch (exp) {
+ case 10:
+ divmod_integral(1000000000);
+ break;
+ case 9:
+ divmod_integral(100000000);
+ break;
+ case 8:
+ divmod_integral(10000000);
+ break;
+ case 7:
+ divmod_integral(1000000);
+ break;
+ case 6:
+ divmod_integral(100000);
+ break;
+ case 5:
+ divmod_integral(10000);
+ break;
+ case 4:
+ divmod_integral(1000);
+ break;
+ case 3:
+ divmod_integral(100);
+ break;
+ case 2:
+ divmod_integral(10);
+ break;
+ case 1:
+ digit = integral;
+ integral = 0;
+ break;
+ default:
+ FMT_ASSERT(false, "invalid number of digits");
+ }
+ --exp;
+ auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
+ result = handler.on_digit(static_cast<char>('0' + digit),
+ data::powers_of_10_64[exp] << -one.e, remainder,
+ error, exp, true);
+ if (result != digits::more) return result;
+ } while (exp > 0);
+ // Generate digits for the fractional part.
+ for (;;) {
+ fractional *= 10;
+ error *= 10;
+ char digit = static_cast<char>('0' + (fractional >> -one.e));
+ fractional &= one.f - 1;
+ --exp;
+ result = handler.on_digit(digit, one.f, fractional, error, exp, false);
+ if (result != digits::more) return result;
+ }
+}
+
+// The fixed precision digit handler.
+struct fixed_handler {
+ char* buf;
+ int size;
+ int precision;
+ int exp10;
+ bool fixed;
+
+ digits::result on_start(uint64_t divisor, uint64_t remainder, uint64_t error,
+ int& exp) {
+ // Non-fixed formats require at least one digit and no precision adjustment.
+ if (!fixed) return digits::more;
+ // Adjust fixed precision by exponent because it is relative to decimal
+ // point.
+ precision += exp + exp10;
+ // Check if precision is satisfied just by leading zeros, e.g.
+ // format("{:.2f}", 0.001) gives "0.00" without generating any digits.
+ if (precision > 0) return digits::more;
+ if (precision < 0) return digits::done;
+ auto dir = get_round_direction(divisor, remainder, error);
+ if (dir == round_direction::unknown) return digits::error;
+ buf[size++] = dir == round_direction::up ? '1' : '0';
+ return digits::done;
+ }
+
+ digits::result on_digit(char digit, uint64_t divisor, uint64_t remainder,
+ uint64_t error, int, bool integral) {
+ FMT_ASSERT(remainder < divisor, "");
+ buf[size++] = digit;
+ if (!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;
+ }
+};
+
+// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
+namespace dragonbox {
+// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
+FMT_SAFEBUFFERS 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.
+FMT_SAFEBUFFERS 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.
+FMT_SAFEBUFFERS 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
+// 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));
+}
+
+// Computes middle 64 bits of multiplication of a 64-bit unsigned integer and a
+// 128-bit unsigned integer.
+FMT_SAFEBUFFERS 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;
+}
+
+// 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 {
+ 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>(data::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>(data::log10_2_significand >>
+ (64 - shift_amount)) -
+ static_cast<int>(log10_4_over_3_fractional_digits >>
+ (64 - shift_amount))) >>
+ shift_amount;
+}
+
+// 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
+}
+
+// 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");
+ return x * data::divtest_table_for_pow5_32[exp].mod_inv <=
+ data::divtest_table_for_pow5_32[exp].max_quotient;
+}
+inline bool divisible_by_power_of_5(uint64_t x, int exp) FMT_NOEXCEPT {
+ FMT_ASSERT(exp <= 23, "too large exponent");
+ return x * data::divtest_table_for_pow5_64[exp].mod_inv <=
+ data::divtest_table_for_pow5_64[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).
+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;
+ 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;
+}
+
+// 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;
+}
+// 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;
+}
+
+// Various subroutines using pow10 cache
+template <class 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 {
+ FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
+ "k is out of range");
+ return data::dragonbox_pow10_significands_64[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);
+ }
+
+ 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));
+ }
+
+ 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, "");
+
+ return ((umul96_lower64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
+ }
+
+ static carrier_uint compute_left_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ return static_cast<carrier_uint>(
+ (cache - (cache >> (float_info<float>::significand_bits + 2))) >>
+ (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
+ }
+
+ static carrier_uint compute_right_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ return static_cast<carrier_uint>(
+ (cache + (cache >> (float_info<float>::significand_bits + 1))) >>
+ (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
+ }
+
+ static carrier_uint compute_round_up_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ return (static_cast<carrier_uint>(
+ cache >>
+ (64 - float_info<float>::significand_bits - 2 - beta_minus_1)) +
+ 1) /
+ 2;
+ }
+};
+
+template <> struct cache_accessor<double> {
+ using carrier_uint = float_info<double>::carrier_uint;
+ using cache_entry_type = uint128_wrapper;
+
+ static uint128_wrapper get_cached_power(int k) FMT_NOEXCEPT {
+ FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
+ "k is out of range");
+
+#if FMT_USE_FULL_CACHE_DRAGONBOX
+ return data::dragonbox_pow10_significands_128[k -
+ float_info<double>::min_k];
+#else
+ static const int compression_ratio = 27;
+
+ // Compute base index.
+ int cache_index = (k - float_info<double>::min_k) / compression_ratio;
+ int kb = cache_index * compression_ratio + float_info<double>::min_k;
+ int offset = k - kb;
+
+ // Get base cache.
+ uint128_wrapper base_cache =
+ data::dragonbox_pow10_significands_128[cache_index];
+ if (offset == 0) return base_cache;
+
+ // Compute the required amount of bit-shift.
+ int alpha = floor_log2_pow10(kb + offset) - floor_log2_pow10(kb) - offset;
+ FMT_ASSERT(alpha > 0 && alpha < 64, "shifting error detected");
+
+ // Try to recover the real cache.
+ uint64_t pow5 = data::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);
+
+ recovered_cache += middle_low.high();
+
+ uint64_t high_to_middle = recovered_cache.high() << (64 - alpha);
+ 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 = (data::dragonbox_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};
+#endif
+ }
+
+ static carrier_uint compute_mul(carrier_uint u,
+ const cache_entry_type& cache) FMT_NOEXCEPT {
+ return umul192_upper64(u, cache);
+ }
+
+ 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));
+ }
+
+ 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, "");
+
+ return ((umul192_middle64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
+ }
+
+ static carrier_uint compute_left_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ return (cache.high() -
+ (cache.high() >> (float_info<double>::significand_bits + 2))) >>
+ (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
+ }
+
+ static carrier_uint compute_right_endpoint_for_shorter_interval_case(
+ const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ return (cache.high() +
+ (cache.high() >> (float_info<double>::significand_bits + 1))) >>
+ (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
+ }
+
+ 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)) +
+ 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);
+}
+
+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);
+}
+
+// Remove trailing zeros from n and return the number of zeros removed (float)
+FMT_ALWAYS_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;
+
+ int s = 0;
+ for (; s < t - 1; s += 2) {
+ if (n * mod_inv2 > max_quotient2) break;
+ n *= mod_inv2;
+ }
+ if (s < t && n * mod_inv1 <= max_quotient1) {
+ n *= mod_inv1;
+ ++s;
+ }
+ n >>= s;
+ return s;
+}
+
+// Removes trailing zeros and returns the number of zeros removed (double)
+FMT_ALWAYS_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
+
+ const uint32_t mod_inv1 = 0xcccccccd;
+ const uint32_t max_quotient1 = 0x33333333;
+ const uint64_t mod_inv8 = 0xc767074b22e90e21;
+ const uint64_t max_quotient8 = 0x00002af31dc46118;
+
+ // If the number is divisible by 1'0000'0000, work with the quotient
+ if (t >= 8) {
+ auto quotient_candidate = n * mod_inv8;
+
+ if (quotient_candidate <= max_quotient8) {
+ auto quotient = static_cast<uint32_t>(quotient_candidate >> 8);
+
+ int s = 8;
+ for (; s < t; ++s) {
+ if (quotient * mod_inv1 > max_quotient1) break;
+ quotient *= mod_inv1;
+ }
+ quotient >>= (s - 8);
+ n = quotient;
+ 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 (t == 0 || remainder * mod_inv1 > max_quotient1) {
+ return 0;
+ }
+ remainder *= mod_inv1;
+
+ if (t == 1 || remainder * mod_inv1 > max_quotient1) {
+ n = (remainder >> 1) + quotient * 10000000ull;
+ return 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;
+}
+
+// The main algorithm for shorter interval case
+template <class T>
+FMT_ALWAYS_INLINE FMT_SAFEBUFFERS decimal_fp<T> shorter_interval_case(
+ int exponent) FMT_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);
+
+ // 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);
+ auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
+ cache, beta_minus_1);
+
+ // If the left endpoint is not an integer, increase it
+ if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
+
+ // Try bigger divisor
+ ret_value.significand = zi / 10;
+
+ // If succeed, remove trailing zeros if necessary and return
+ if (ret_value.significand * 10 >= xi) {
+ ret_value.exponent = minus_k + 1;
+ ret_value.exponent += remove_trailing_zeros(ret_value.significand);
+ return ret_value;
+ }
+
+ // Otherwise, compute the round-up of y
+ ret_value.significand =
+ cache_accessor<T>::compute_round_up_for_shorter_interval_case(
+ cache, beta_minus_1);
+ ret_value.exponent = minus_k;
+
+ // When tie occurs, choose one of them according to the rule
+ if (exponent >= float_info<T>::shorter_interval_tie_lower_threshold &&
+ exponent <= float_info<T>::shorter_interval_tie_upper_threshold) {
+ ret_value.significand = ret_value.significand % 2 == 0
+ ? ret_value.significand
+ : ret_value.significand - 1;
+ } else if (ret_value.significand < xi) {
+ ++ret_value.significand;
+ }
+ return ret_value;
+}
+
+template <typename T>
+FMT_SAFEBUFFERS decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
+ // Step 1: integer promotion & Schubfach multiplier calculation.
+
+ using carrier_uint = typename float_info<T>::carrier_uint;
+ using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
+ auto br = bit_cast<carrier_uint>(x);
+
+ // Extract significand bits and exponent bits.
+ const carrier_uint significand_mask =
+ (static_cast<carrier_uint>(1) << float_info<T>::significand_bits) - 1;
+ carrier_uint significand = (br & significand_mask);
+ int exponent = static_cast<int>((br & exponent_mask<T>()) >>
+ float_info<T>::significand_bits);
+
+ if (exponent != 0) { // Check if normal.
+ exponent += float_info<T>::exponent_bias - float_info<T>::significand_bits;
+
+ // Shorter interval case; proceed like Schubfach.
+ if (significand == 0) return shorter_interval_case<T>(exponent);
+
+ significand |=
+ (static_cast<carrier_uint>(1) << float_info<T>::significand_bits);
+ } 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;
+ }
+
+ const bool include_left_endpoint = (significand % 2 == 0);
+ const bool include_right_endpoint = include_left_endpoint;
+
+ // 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);
+
+ // Compute zi and deltai
+ // 10^kappa <= deltai < 10^(kappa + 1)
+ const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta_minus_1);
+ 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
+
+ // 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
+ 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);
+
+ 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)) {
+ --ret_value.significand;
+ r = float_info<T>::big_divisor;
+ 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)) {
+ goto small_divisor_case_label;
+ }
+ }
+ ret_value.exponent = minus_k + float_info<T>::kappa + 1;
+
+ // 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
+
+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);
+
+ // 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 5^kappa?
+ if (check_divisibility_and_divide_by_pow5<float_info<T>::kappa>(dist)) {
+ 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);
+ }
+ return ret_value;
+}
+} // namespace dragonbox
+
+// Formats value using a variation of the Fixed-Precision Positive
+// Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
+// https://fmt.dev/p372-steele.pdf.
+template <typename Double>
+void fallback_format(Double d, int num_digits, bool binary32, 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).
+ fp value;
+ // Shift numerator and denominator by an extra bit or two (if lower boundary
+ // is closer) to make lower and upper integers. This eliminates multiplication
+ // by 2 during later computations.
+ const bool is_predecessor_closer =
+ binary32 ? value.assign(static_cast<float>(d)) : value.assign(d);
+ 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) {
+ buf.try_resize(1);
+ denominator *= 10;
+ buf[0] = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
+ 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 T>
+int format_float(T value, int precision, float_specs specs, buffer<char>& buf) {
+ static_assert(!std::is_same<T, 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));
+ std::uninitialized_fill_n(buf.data(), precision, '0');
+ return -precision;
+ }
+
+ if (!specs.use_grisu) return snprintf_float(value, precision, specs, buf);
+
+ if (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;
+ }
+
+ // Use Grisu + Dragon4 for the given precision:
+ // https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
+ int exp = 0;
+ 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::significand_size), cached_exp10);
+ normalized = normalized * cached_pow;
+ // 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;
+ fixed_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
+ if (grisu_gen_digits(normalized, 1, exp, handler) == digits::error) {
+ exp += handler.size - cached_exp10 - 1;
+ fallback_format(value, handler.precision, specs.binary32, buf, exp);
+ } else {
+ exp += handler.exp10;
+ buf.try_resize(to_unsigned(handler.size));
+ }
+ 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;
+} // namespace detail
+
+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];
+ assert(sign == '+' || sign == '-');
+ int exp = 0;
+ auto p = exp_pos + 2; // Skip 'e' and sign.
+ do {
+ assert(is_digit(*p));
+ exp = exp * 10 + (*p++ - '0');
+ } while (p != end);
+ if (sign == '-') exp = -exp;
+ int fraction_size = 0;
+ if (exp_pos != begin + 1) {
+ // Remove trailing zeros.
+ auto fraction_end = exp_pos - 1;
+ while (*fraction_end == '0') --fraction_end;
+ // Move the fractional part left to get rid of the decimal point.
+ fraction_size = static_cast<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;
+ }
+}
+
+// A public domain branchless UTF-8 decoder by Christopher Wellons:
+// https://github.com/skeeto/branchless-utf8
+/* Decode the next character, c, from buf, reporting errors in e.
+ *
+ * Since this is a branchless decoder, four bytes will be read from the
+ * buffer regardless of the actual length of the next character. This
+ * means the buffer _must_ have at least three bytes of zero padding
+ * following the end of the data stream.
+ *
+ * Errors are reported in e, which will be non-zero if the parsed
+ * character was somehow invalid: invalid byte sequence, non-canonical
+ * encoding, or a surrogate half.
+ *
+ * The function returns a pointer to the next character. When an error
+ * occurs, this pointer will be a guess that depends on the particular
+ * error, but it will always advance at least one byte.
+ */
+inline const char* utf8_decode(const char* buf, uint32_t* c, int* e) {
+ static const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
+ static const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
+ static const int shiftc[] = {0, 18, 12, 6, 0};
+ static const int shifte[] = {0, 6, 4, 2, 0};
+
+ int len = code_point_length(buf);
+ const char* next = buf + len;
+
+ // Assume a four-byte character and load four bytes. Unused bits are
+ // shifted out.
+ auto s = reinterpret_cast<const unsigned char*>(buf);
+ *c = uint32_t(s[0] & masks[len]) << 18;
+ *c |= uint32_t(s[1] & 0x3f) << 12;
+ *c |= uint32_t(s[2] & 0x3f) << 6;
+ *c |= uint32_t(s[3] & 0x3f) << 0;
+ *c >>= shiftc[len];
+
+ // Accumulate the various error conditions.
+ *e = (*c < mins[len]) << 6; // non-canonical encoding
+ *e |= ((*c >> 11) == 0x1b) << 7; // surrogate half?
+ *e |= (*c > 0x10FFFF) << 8; // out of range?
+ *e |= (s[1] & 0xc0) >> 2;
+ *e |= (s[2] & 0xc0) >> 4;
+ *e |= (s[3]) >> 6;
+ *e ^= 0x2a; // top two bits of each tail byte correct?
+ *e >>= shifte[len];
+
+ return next;
+}
+
+struct stringifier {
+ template <typename T> FMT_INLINE std::string operator()(T value) const {
+ return to_string(value);
+ }
+ std::string operator()(basic_format_arg<format_context>::handle h) const {
+ memory_buffer buf;
+ format_parse_context parse_ctx({});
+ format_context format_ctx(buffer_appender<char>(buf), {}, {});
+ h.format(parse_ctx, format_ctx);
+ return to_string(buf);
+ }
+};
+} // namespace detail
+
+template <> struct formatter<detail::bigint> {
+ format_parse_context::iterator parse(format_parse_context& ctx) {
+ return ctx.begin();
+ }
+
+ format_context::iterator format(const detail::bigint& n,
+ format_context& ctx) {
+ auto out = ctx.out();
+ bool first = true;
+ for (auto i = n.bigits_.size(); i > 0; --i) {
+ auto value = n.bigits_[i - 1u];
+ if (first) {
+ out = format_to(out, "{:x}", value);
+ first = false;
+ continue;
+ }
+ out = format_to(out, "{:08x}", value);
+ }
+ if (n.exp_ > 0)
+ out = format_to(out, "p{}", n.exp_ * detail::bigint::bigit_bits);
+ return out;
+ }
+};
+
+FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) {
+ auto transcode = [this](const char* p) {
+ auto cp = uint32_t();
+ auto error = 0;
+ p = utf8_decode(p, &cp, &error);
+ if (error != 0) FMT_THROW(std::runtime_error("invalid utf8"));
+ if (cp <= 0xFFFF) {
+ buffer_.push_back(static_cast<wchar_t>(cp));
+ } else {
+ cp -= 0x10000;
+ buffer_.push_back(static_cast<wchar_t>(0xD800 + (cp >> 10)));
+ buffer_.push_back(static_cast<wchar_t>(0xDC00 + (cp & 0x3FF)));
+ }
+ return p;
+ };
+ auto p = s.data();
+ const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars.
+ if (s.size() >= block_size) {
+ for (auto end = p + s.size() - block_size + 1; p < end;) p = transcode(p);
+ }
+ if (auto num_chars_left = s.data() + s.size() - p) {
+ char buf[2 * block_size - 1] = {};
+ memcpy(buf, p, to_unsigned(num_chars_left));
+ p = buf;
+ do {
+ p = transcode(p);
+ } while (p - buf < num_chars_left);
+ }
+ buffer_.push_back(0);
+}
+
+FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
+ string_view message) FMT_NOEXCEPT {
+ FMT_TRY {
+ memory_buffer buf;
+ buf.resize(inline_buffer_size);
+ for (;;) {
+ char* system_message = &buf[0];
+ int result =
+ detail::safe_strerror(error_code, system_message, buf.size());
+ if (result == 0) {
+ format_to(detail::buffer_appender<char>(out), "{}: {}", message,
+ system_message);
+ return;
+ }
+ if (result != ERANGE)
+ break; // Can't get error message, report error code instead.
+ buf.resize(buf.size() * 2);
+ }
+ }
+ FMT_CATCH(...) {}
+ format_error_code(out, error_code, message);
+}
+
+FMT_FUNC void detail::error_handler::on_error(const char* message) {
+ FMT_THROW(format_error(message));
+}
+
+FMT_FUNC void report_system_error(int error_code,
+ fmt::string_view message) FMT_NOEXCEPT {
+ report_error(format_system_error, error_code, message);
+}
+
+FMT_FUNC std::string detail::vformat(string_view format_str, format_args args) {
+ if (format_str.size() == 2 && equal2(format_str.data(), "{}")) {
+ auto arg = args.get(0);
+ if (!arg) error_handler().on_error("argument not found");
+ return visit_format_arg(stringifier(), arg);
+ }
+ memory_buffer buffer;
+ detail::vformat_to(buffer, format_str, args);
+ return to_string(buffer);
+}
+
+#ifdef _WIN32
+namespace detail {
+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
+
+FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
+ memory_buffer buffer;
+ detail::vformat_to(buffer, format_str,
+ basic_format_args<buffer_context<char>>(args));
+#ifdef _WIN32
+ auto fd = _fileno(f);
+ if (_isatty(fd)) {
+ detail::utf8_to_utf16 u16(string_view(buffer.data(), buffer.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)) {
+ FMT_THROW(format_error("failed to write to console"));
+ }
+ return;
+ }
+#endif
+ detail::fwrite_fully(buffer.data(), 1, buffer.size(), f);
+}
+
+#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,
+ 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_END_NAMESPACE
+
+#endif // FMT_FORMAT_INL_H_
diff --git a/src/3rdparty/fmt/format.h b/src/3rdparty/fmt/format.h
new file mode 100644
index 000000000..1a037b02b
--- /dev/null
+++ b/src/3rdparty/fmt/format.h
@@ -0,0 +1,3960 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - present, Victor Zverovich
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ --- Optional exception to the license ---
+
+ As an exception, if, as a result of your compiling your source code, portions
+ of this Software are embedded into a machine-executable object form of such
+ source code, you may redistribute such embedded portions in such object form
+ without including the above copyright and permission notices.
+ */
+
+#ifndef FMT_FORMAT_H_
+#define FMT_FORMAT_H_
+
+#include <algorithm>
+#include <cerrno>
+#include <cmath>
+#include <cstdint>
+#include <limits>
+#include <memory>
+#include <stdexcept>
+
+#include "core.h"
+
+#ifdef __INTEL_COMPILER
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#elif defined(__ICL)
+# define FMT_ICC_VERSION __ICL
+#else
+# define FMT_ICC_VERSION 0
+#endif
+
+#ifdef __NVCC__
+# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
+#else
+# define FMT_CUDA_VERSION 0
+#endif
+
+#ifdef __has_builtin
+# define FMT_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define FMT_HAS_BUILTIN(x) 0
+#endif
+
+#if FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_NOINLINE __attribute__((noinline))
+#else
+# define FMT_NOINLINE
+#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) || \
+ (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
+# define FMT_FALLTHROUGH [[fallthrough]]
+#else
+# define FMT_FALLTHROUGH
+#endif
+
+#ifndef FMT_MAYBE_UNUSED
+# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
+# define FMT_MAYBE_UNUSED [[maybe_unused]]
+# else
+# define FMT_MAYBE_UNUSED
+# endif
+#endif
+
+#ifndef FMT_THROW
+# if FMT_EXCEPTIONS
+# if FMT_MSC_VER || FMT_NVCC
+FMT_BEGIN_NAMESPACE
+namespace detail {
+template <typename Exception> inline void do_throw(const Exception& x) {
+ // Silence unreachable code warnings in MSVC and NVCC because these
+ // are nearly impossible to fix in a generic code.
+ volatile bool b = true;
+ if (b) throw x;
+}
+} // namespace detail
+FMT_END_NAMESPACE
+# define FMT_THROW(x) detail::do_throw(x)
+# else
+# define FMT_THROW(x) throw x
+# endif
+# else
+# define FMT_THROW(x) \
+ do { \
+ static_cast<void>(sizeof(x)); \
+ FMT_ASSERT(false, ""); \
+ } while (false)
+# endif
+#endif
+
+#if FMT_EXCEPTIONS
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
+#else
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
+#endif
+
+#ifndef FMT_USE_USER_DEFINED_LITERALS
+// 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) && \
+ (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
+# define FMT_USE_USER_DEFINED_LITERALS 1
+# else
+# define FMT_USE_USER_DEFINED_LITERALS 0
+# endif
+#endif
+
+#ifndef FMT_USE_UDL_TEMPLATE
+// EDG frontend based compilers (icc, nvcc, PGI, etc) and GCC < 6.4 do not
+// properly support UDL templates and GCC >= 9 warns about them.
+# if FMT_USE_USER_DEFINED_LITERALS && \
+ (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 501) && \
+ ((FMT_GCC_VERSION >= 604 && __cplusplus >= 201402L) || \
+ FMT_CLANG_VERSION >= 304) && \
+ !defined(__PGI) && !defined(__NVCC__)
+# define FMT_USE_UDL_TEMPLATE 1
+# else
+# define FMT_USE_UDL_TEMPLATE 0
+# endif
+#endif
+
+#ifndef FMT_USE_FLOAT
+# define FMT_USE_FLOAT 1
+#endif
+
+#ifndef FMT_USE_DOUBLE
+# define FMT_USE_DOUBLE 1
+#endif
+
+#ifndef FMT_USE_LONG_DOUBLE
+# define FMT_USE_LONG_DOUBLE 1
+#endif
+
+// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
+// int_writer template instances to just one by only using the largest integer
+// type. This results in a reduction in binary size but will cause a decrease in
+// integer formatting performance.
+#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
+# define FMT_REDUCE_INT_INSTANTIATIONS 0
+#endif
+
+// __builtin_clz is broken in clang with Microsoft CodeGen:
+// https://github.com/fmtlib/fmt/issues/519
+#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clz)) && !FMT_MSC_VER
+# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
+#endif
+#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_clzll)) && !FMT_MSC_VER
+# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
+#endif
+#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_ctz))
+# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
+#endif
+#if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_ctzll))
+# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
+#endif
+
+#if FMT_MSC_VER
+# 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) && !defined(_MANAGED)
+FMT_BEGIN_NAMESPACE
+namespace detail {
+// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
+# ifndef __clang__
+# pragma intrinsic(_BitScanForward)
+# pragma intrinsic(_BitScanReverse)
+# endif
+# if defined(_WIN64) && !defined(__clang__)
+# pragma intrinsic(_BitScanForward64)
+# pragma intrinsic(_BitScanReverse64)
+# endif
+
+inline int clz(uint32_t x) {
+ unsigned long r = 0;
+ _BitScanReverse(&r, x);
+ FMT_ASSERT(x != 0, "");
+ // Static analysis complains about using uninitialized data
+ // "r", but the only way that can happen is if "x" is 0,
+ // which the callers guarantee to not happen.
+ FMT_SUPPRESS_MSC_WARNING(6102)
+ return 31 ^ static_cast<int>(r);
+}
+# define FMT_BUILTIN_CLZ(n) detail::clz(n)
+
+inline int clzll(uint64_t x) {
+ unsigned long r = 0;
+# ifdef _WIN64
+ _BitScanReverse64(&r, x);
+# else
+ // Scan the high 32 bits.
+ if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 ^ (r + 32);
+ // Scan the low 32 bits.
+ _BitScanReverse(&r, static_cast<uint32_t>(x));
+# endif
+ FMT_ASSERT(x != 0, "");
+ FMT_SUPPRESS_MSC_WARNING(6102) // Suppress a bogus static analysis warning.
+ return 63 ^ static_cast<int>(r);
+}
+# define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
+
+inline int ctz(uint32_t x) {
+ unsigned long r = 0;
+ _BitScanForward(&r, x);
+ FMT_ASSERT(x != 0, "");
+ FMT_SUPPRESS_MSC_WARNING(6102) // Suppress a bogus static analysis warning.
+ return static_cast<int>(r);
+}
+# define FMT_BUILTIN_CTZ(n) detail::ctz(n)
+
+inline int ctzll(uint64_t x) {
+ unsigned long r = 0;
+ FMT_ASSERT(x != 0, "");
+ FMT_SUPPRESS_MSC_WARNING(6102) // Suppress a bogus static analysis warning.
+# ifdef _WIN64
+ _BitScanForward64(&r, x);
+# else
+ // Scan the low 32 bits.
+ if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
+ // Scan the high 32 bits.
+ _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
+ r += 32;
+# endif
+ return static_cast<int>(r);
+}
+# define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
+} // namespace detail
+FMT_END_NAMESPACE
+#endif
+
+// Enable the deprecated numeric alignment.
+#ifndef FMT_DEPRECATED_NUMERIC_ALIGN
+# define FMT_DEPRECATED_NUMERIC_ALIGN 0
+#endif
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+// An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't have
+// undefined behavior (e.g. due to type aliasing).
+// Example: uint64_t d = bit_cast<uint64_t>(2.718);
+template <typename Dest, typename Source>
+inline Dest bit_cast(const Source& source) {
+ static_assert(sizeof(Dest) == sizeof(Source), "size mismatch");
+ Dest dest;
+ std::memcpy(&dest, &source, sizeof(dest));
+ return dest;
+}
+
+inline bool is_big_endian() {
+ const auto u = 1u;
+ struct bytes {
+ char data[sizeof(u)];
+ };
+ return bit_cast<bytes>(u).data[0] == 0;
+}
+
+// A fallback implementation of uintptr_t for systems that lack it.
+struct fallback_uintptr {
+ unsigned char value[sizeof(void*)];
+
+ fallback_uintptr() = default;
+ explicit fallback_uintptr(const void* p) {
+ *this = bit_cast<fallback_uintptr>(p);
+ if (is_big_endian()) {
+ for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j)
+ std::swap(value[i], value[j]);
+ }
+ }
+};
+#ifdef UINTPTR_MAX
+using uintptr_t = ::uintptr_t;
+inline uintptr_t to_uintptr(const void* p) { return bit_cast<uintptr_t>(p); }
+#else
+using uintptr_t = fallback_uintptr;
+inline fallback_uintptr to_uintptr(const void* p) {
+ return fallback_uintptr(p);
+}
+#endif
+
+// Returns the largest possible value for type T. Same as
+// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
+template <typename T> constexpr T max_value() {
+ return (std::numeric_limits<T>::max)();
+}
+template <typename T> constexpr int num_bits() {
+ return std::numeric_limits<T>::digits;
+}
+// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
+template <> constexpr int num_bits<int128_t>() { return 128; }
+template <> constexpr int num_bits<uint128_t>() { return 128; }
+template <> constexpr int num_bits<fallback_uintptr>() {
+ return static_cast<int>(sizeof(void*) *
+ std::numeric_limits<unsigned char>::digits);
+}
+
+FMT_INLINE void assume(bool condition) {
+ (void)condition;
+#if FMT_HAS_BUILTIN(__builtin_assume)
+ __builtin_assume(condition);
+#endif
+}
+
+// An approximation of iterator_t for pre-C++20 systems.
+template <typename T>
+using iterator_t = decltype(std::begin(std::declval<T&>()));
+template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
+
+// A workaround for std::string not having mutable data() until C++17.
+template <typename Char> inline Char* get_data(std::basic_string<Char>& s) {
+ return &s[0];
+}
+template <typename Container>
+inline typename Container::value_type* get_data(Container& c) {
+ return c.data();
+}
+
+#if defined(_SECURE_SCL) && _SECURE_SCL
+// Make a checked iterator to avoid MSVC warnings.
+template <typename T> using checked_ptr = stdext::checked_array_iterator<T*>;
+template <typename T> checked_ptr<T> make_checked(T* p, size_t size) {
+ return {p, size};
+}
+#else
+template <typename T> using checked_ptr = T*;
+template <typename T> inline T* make_checked(T* p, size_t) { return p; }
+#endif
+
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+#if FMT_CLANG_VERSION
+__attribute__((no_sanitize("undefined")))
+#endif
+inline checked_ptr<typename Container::value_type>
+reserve(std::back_insert_iterator<Container> it, size_t n) {
+ Container& c = get_container(it);
+ size_t size = c.size();
+ c.resize(size + n);
+ return make_checked(get_data(c) + size, n);
+}
+
+template <typename T>
+inline buffer_appender<T> reserve(buffer_appender<T> it, size_t n) {
+ buffer<T>& buf = get_container(it);
+ buf.try_reserve(buf.size() + n);
+ return it;
+}
+
+template <typename Iterator> inline Iterator& reserve(Iterator& it, size_t) {
+ return it;
+}
+
+template <typename T, typename OutputIt>
+constexpr T* to_pointer(OutputIt, size_t) {
+ return nullptr;
+}
+template <typename T> T* to_pointer(buffer_appender<T> it, size_t n) {
+ buffer<T>& buf = get_container(it);
+ auto size = buf.size();
+ if (buf.capacity() < size + n) return nullptr;
+ buf.try_resize(size + n);
+ return buf.data() + size;
+}
+
+template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
+inline std::back_insert_iterator<Container> base_iterator(
+ std::back_insert_iterator<Container>& it,
+ checked_ptr<typename Container::value_type>) {
+ return it;
+}
+
+template <typename Iterator>
+inline Iterator base_iterator(Iterator, Iterator it) {
+ return it;
+}
+
+// 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;
+ using _Unchecked_type = counting_iterator; // Mark iterator as checked.
+
+ struct value_type {
+ template <typename T> void operator=(const T&) {}
+ };
+
+ counting_iterator() : count_(0) {}
+
+ size_t count() const { return count_; }
+
+ counting_iterator& operator++() {
+ ++count_;
+ return *this;
+ }
+ counting_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
+ }
+
+ friend counting_iterator operator+(counting_iterator it, difference_type n) {
+ it.count_ += static_cast<size_t>(n);
+ return it;
+ }
+
+ value_type operator*() const { return {}; }
+};
+
+template <typename OutputIt> class truncating_iterator_base {
+ protected:
+ OutputIt out_;
+ size_t limit_;
+ size_t count_;
+
+ truncating_iterator_base(OutputIt out, size_t limit)
+ : out_(out), limit_(limit), count_(0) {}
+
+ public:
+ using iterator_category = std::output_iterator_tag;
+ using value_type = typename std::iterator_traits<OutputIt>::value_type;
+ using difference_type = void;
+ using pointer = void;
+ using reference = void;
+ using _Unchecked_type =
+ truncating_iterator_base; // Mark iterator as checked.
+
+ OutputIt base() const { return out_; }
+ size_t count() const { return count_; }
+};
+
+// An output iterator that truncates the output and counts the number of objects
+// written to it.
+template <typename OutputIt,
+ typename Enable = typename std::is_void<
+ typename std::iterator_traits<OutputIt>::value_type>::type>
+class truncating_iterator;
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::false_type>
+ : public truncating_iterator_base<OutputIt> {
+ mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
+
+ public:
+ using value_type = typename truncating_iterator_base<OutputIt>::value_type;
+
+ truncating_iterator(OutputIt out, size_t limit)
+ : truncating_iterator_base<OutputIt>(out, limit) {}
+
+ truncating_iterator& operator++() {
+ if (this->count_++ < this->limit_) ++this->out_;
+ return *this;
+ }
+
+ truncating_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
+ }
+
+ value_type& operator*() const {
+ return this->count_ < this->limit_ ? *this->out_ : blackhole_;
+ }
+};
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::true_type>
+ : public truncating_iterator_base<OutputIt> {
+ public:
+ truncating_iterator(OutputIt out, size_t limit)
+ : truncating_iterator_base<OutputIt>(out, limit) {}
+
+ template <typename T> truncating_iterator& operator=(T val) {
+ if (this->count_++ < this->limit_) *this->out_++ = val;
+ return *this;
+ }
+
+ truncating_iterator& operator++() { return *this; }
+ truncating_iterator& operator++(int) { return *this; }
+ truncating_iterator& operator*() { return *this; }
+};
+
+template <typename Char>
+inline size_t count_code_points(basic_string_view<Char> s) {
+ return s.size();
+}
+
+// Counts the number of code points in a UTF-8 string.
+inline size_t count_code_points(basic_string_view<char> s) {
+ const char* data = s.data();
+ size_t num_code_points = 0;
+ for (size_t i = 0, size = s.size(); i != size; ++i) {
+ if ((data[i] & 0xc0) != 0x80) ++num_code_points;
+ }
+ return num_code_points;
+}
+
+inline size_t count_code_points(basic_string_view<char8_type> s) {
+ return count_code_points(basic_string_view<char>(
+ reinterpret_cast<const char*>(s.data()), s.size()));
+}
+
+template <typename Char>
+inline size_t code_point_index(basic_string_view<Char> s, size_t n) {
+ size_t size = s.size();
+ return n < size ? n : size;
+}
+
+// Calculates the index of the nth code point in a UTF-8 string.
+inline size_t code_point_index(basic_string_view<char8_type> s, size_t n) {
+ const char8_type* data = s.data();
+ size_t num_code_points = 0;
+ for (size_t i = 0, size = s.size(); i != size; ++i) {
+ if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) {
+ return i;
+ }
+ }
+ return s.size();
+}
+
+template <typename InputIt, typename OutChar>
+using needs_conversion = bool_constant<
+ std::is_same<typename std::iterator_traits<InputIt>::value_type,
+ char>::value &&
+ std::is_same<OutChar, char8_type>::value>;
+
+template <typename OutChar, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(!needs_conversion<InputIt, OutChar>::value)>
+OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
+ return std::copy(begin, end, it);
+}
+
+template <typename OutChar, typename InputIt, typename OutputIt,
+ FMT_ENABLE_IF(needs_conversion<InputIt, OutChar>::value)>
+OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
+ return std::transform(begin, end, it,
+ [](char c) { return static_cast<char8_type>(c); });
+}
+
+template <typename Char, typename InputIt>
+inline counting_iterator copy_str(InputIt begin, InputIt end,
+ counting_iterator it) {
+ return it + (end - begin);
+}
+
+template <typename T>
+using is_fast_float = bool_constant<std::numeric_limits<T>::is_iec559 &&
+ sizeof(T) <= sizeof(double)>;
+
+#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
+# define FMT_USE_FULL_CACHE_DRAGONBOX 0
+#endif
+
+template <typename T>
+template <typename U>
+void buffer<T>::append(const U* begin, const U* end) {
+ do {
+ auto count = to_unsigned(end - begin);
+ try_reserve(size_ + count);
+ auto free_cap = capacity_ - size_;
+ if (free_cap < count) count = free_cap;
+ std::uninitialized_copy_n(begin, count, make_checked(ptr_ + size_, count));
+ size_ += count;
+ begin += count;
+ } while (begin != end);
+}
+
+template <typename OutputIt, typename T, typename Traits>
+void iterator_buffer<OutputIt, T, Traits>::flush() {
+ out_ = std::copy_n(data_, this->limit(this->size()), out_);
+ this->clear();
+}
+} // namespace detail
+
+// The number of characters to store in the basic_memory_buffer object itself
+// to avoid dynamic memory allocation.
+enum { inline_buffer_size = 500 };
+
+/**
+ \rst
+ A dynamically growing memory buffer for trivially copyable/constructible types
+ with the first ``SIZE`` elements stored in the object itself.
+
+ You can use one of the following type aliases for common character types:
+
+ +----------------+------------------------------+
+ | Type | Definition |
+ +================+==============================+
+ | memory_buffer | basic_memory_buffer<char> |
+ +----------------+------------------------------+
+ | wmemory_buffer | basic_memory_buffer<wchar_t> |
+ +----------------+------------------------------+
+
+ **Example**::
+
+ fmt::memory_buffer out;
+ format_to(out, "The answer is {}.", 42);
+
+ This will append the following output to the ``out`` object:
+
+ .. code-block:: none
+
+ The answer is 42.
+
+ The output can be converted to an ``std::string`` with ``to_string(out)``.
+ \endrst
+ */
+template <typename T, size_t SIZE = inline_buffer_size,
+ typename Allocator = std::allocator<T>>
+class basic_memory_buffer final : public detail::buffer<T> {
+ private:
+ T store_[SIZE];
+
+ // Don't inherit from Allocator avoid generating type_info for it.
+ Allocator alloc_;
+
+ // Deallocate memory allocated by the buffer.
+ void deallocate() {
+ T* data = this->data();
+ if (data != store_) alloc_.deallocate(data, this->capacity());
+ }
+
+ protected:
+ void grow(size_t size) final FMT_OVERRIDE;
+
+ public:
+ using value_type = T;
+ using const_reference = const T&;
+
+ explicit basic_memory_buffer(const Allocator& alloc = Allocator())
+ : alloc_(alloc) {
+ this->set(store_, SIZE);
+ }
+ ~basic_memory_buffer() { deallocate(); }
+
+ private:
+ // Move data from other to this buffer.
+ void move(basic_memory_buffer& other) {
+ alloc_ = std::move(other.alloc_);
+ T* data = other.data();
+ size_t size = other.size(), capacity = other.capacity();
+ if (data == other.store_) {
+ this->set(store_, capacity);
+ std::uninitialized_copy(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);
+ }
+ this->resize(size);
+ }
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::basic_memory_buffer` object moving the content
+ of the other object to it.
+ \endrst
+ */
+ basic_memory_buffer(basic_memory_buffer&& other) FMT_NOEXCEPT { move(other); }
+
+ /**
+ \rst
+ Moves the content of the other ``basic_memory_buffer`` object to this one.
+ \endrst
+ */
+ basic_memory_buffer& operator=(basic_memory_buffer&& other) FMT_NOEXCEPT {
+ FMT_ASSERT(this != &other, "");
+ deallocate();
+ move(other);
+ return *this;
+ }
+
+ // Returns a copy of the allocator associated with this buffer.
+ Allocator get_allocator() const { return alloc_; }
+
+ /**
+ Resizes the buffer to contain *count* elements. If T is a POD type new
+ elements may not be initialized.
+ */
+ void resize(size_t count) { this->try_resize(count); }
+
+ /** Increases the buffer capacity to *new_capacity*. */
+ void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
+
+ // Directly append data into the buffer
+ using detail::buffer<T>::append;
+ template <typename ContiguousRange>
+ void append(const ContiguousRange& range) {
+ append(range.data(), range.data() + range.size());
+ }
+};
+
+template <typename T, size_t SIZE, typename Allocator>
+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
+ size_t old_capacity = this->capacity();
+ size_t new_capacity = old_capacity + old_capacity / 2;
+ if (size > new_capacity) new_capacity = size;
+ T* old_data = this->data();
+ T* new_data =
+ std::allocator_traits<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>;
+using wmemory_buffer = basic_memory_buffer<wchar_t>;
+
+template <typename T, size_t SIZE, typename Allocator>
+struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
+};
+
+/** A formatting error such as invalid format string. */
+FMT_CLASS_API
+class FMT_API format_error : public std::runtime_error {
+ public:
+ explicit format_error(const char* message) : std::runtime_error(message) {}
+ explicit format_error(const std::string& message)
+ : std::runtime_error(message) {}
+ format_error(const format_error&) = default;
+ format_error& operator=(const format_error&) = default;
+ format_error(format_error&&) = default;
+ format_error& operator=(format_error&&) = default;
+ ~format_error() FMT_NOEXCEPT FMT_OVERRIDE;
+};
+
+namespace detail {
+
+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 bool is_negative(T value) {
+ return value < 0;
+}
+template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
+FMT_CONSTEXPR bool is_negative(T) {
+ return false;
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+FMT_CONSTEXPR bool is_supported_floating_point(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);
+}
+
+// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
+// represent all values of an integral type T.
+template <typename T>
+using uint32_or_64_or_128_t =
+ conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
+ uint32_t,
+ conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
+
+// 128-bit integer type used internally
+struct FMT_EXTERN_TEMPLATE_API uint128_wrapper {
+ uint128_wrapper() = default;
+
+#if FMT_USE_INT128
+ uint128_t internal_;
+
+ uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
+ : internal_{static_cast<uint128_t>(low) |
+ (static_cast<uint128_t>(high) << 64)} {}
+
+ uint128_wrapper(uint128_t u) : internal_{u} {}
+
+ uint64_t high() const FMT_NOEXCEPT { return uint64_t(internal_ >> 64); }
+ 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_;
+
+ uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT : high_{high},
+ low_{low} {}
+
+ uint64_t high() const FMT_NOEXCEPT { return high_; }
+ 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
+};
+
+// Table entry type for divisibility test used internally
+template <typename T> struct FMT_EXTERN_TEMPLATE_API divtest_table_entry {
+ T mod_inv;
+ T max_quotient;
+};
+
+// Static data is placed in this class template for the header-only config.
+template <typename T = void> struct FMT_EXTERN_TEMPLATE_API basic_data {
+ static const uint64_t powers_of_10_64[];
+ static const uint32_t zero_or_powers_of_10_32_new[];
+ static const uint64_t zero_or_powers_of_10_64_new[];
+ static const uint64_t grisu_pow10_significands[];
+ static const int16_t grisu_pow10_exponents[];
+ static const divtest_table_entry<uint32_t> divtest_table_for_pow5_32[];
+ static const divtest_table_entry<uint64_t> divtest_table_for_pow5_64[];
+ static const uint64_t dragonbox_pow10_significands_64[];
+ static const uint128_wrapper dragonbox_pow10_significands_128[];
+ // log10(2) = 0x0.4d104d427de7fbcc...
+ static const uint64_t log10_2_significand = 0x4d104d427de7fbcc;
+#if !FMT_USE_FULL_CACHE_DRAGONBOX
+ static const uint64_t powers_of_5_64[];
+ static const uint32_t dragonbox_pow10_recovery_errors[];
+#endif
+ // GCC generates slightly better code for pairs than chars.
+ using digit_pair = char[2];
+ static const digit_pair digits[];
+ static const char hex_digits[];
+ static const char foreground_color[];
+ static const char background_color[];
+ static const char reset_color[5];
+ static const wchar_t wreset_color[5];
+ static const char signs[];
+ static const char left_padding_shifts[5];
+ static const char right_padding_shifts[5];
+
+ // DEPRECATED! These are for ABI compatibility.
+ static const uint32_t zero_or_powers_of_10_32[];
+ static const uint64_t zero_or_powers_of_10_64[];
+};
+
+// Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
+// This is a function instead of an array to workaround a bug in GCC10 (#1810).
+FMT_INLINE uint16_t bsr2log10(int bsr) {
+ static constexpr uint16_t data[] = {
+ 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5,
+ 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
+ 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
+ 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
+ return data[bsr];
+}
+
+#ifndef FMT_EXPORTED
+FMT_EXTERN template struct basic_data<void>;
+#endif
+
+// This is a struct rather than an alias to avoid shadowing warnings in gcc.
+struct data : basic_data<> {};
+
+#ifdef FMT_BUILTIN_CLZLL
+// Returns the number of decimal digits in n. Leading zeros are not counted
+// except for n == 0 in which case count_digits returns 1.
+inline int count_digits(uint64_t n) {
+ // https://github.com/fmtlib/format-benchmark/blob/master/digits10
+ auto t = bsr2log10(FMT_BUILTIN_CLZLL(n | 1) ^ 63);
+ return t - (n < data::zero_or_powers_of_10_64_new[t]);
+}
+#else
+// Fallback version of count_digits used when __builtin_clz is not available.
+inline int count_digits(uint64_t n) {
+ int count = 1;
+ for (;;) {
+ // Integer division is slow so do it for a group of four digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ if (n < 10) return count;
+ if (n < 100) return count + 1;
+ if (n < 1000) return count + 2;
+ if (n < 10000) return count + 3;
+ n /= 10000u;
+ count += 4;
+ }
+}
+#endif
+
+#if FMT_USE_INT128
+inline int count_digits(uint128_t n) {
+ int count = 1;
+ for (;;) {
+ // Integer division is slow so do it for a group of four digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ if (n < 10) return count;
+ if (n < 100) return count + 1;
+ if (n < 1000) return count + 2;
+ if (n < 10000) return count + 3;
+ n /= 10000U;
+ count += 4;
+ }
+}
+#endif
+
+// Counts the number of digits in n. BITS = log2(radix).
+template <unsigned BITS, typename UInt> inline int count_digits(UInt n) {
+ int num_digits = 0;
+ do {
+ ++num_digits;
+ } while ((n >>= BITS) != 0);
+ return num_digits;
+}
+
+template <> int count_digits<4>(detail::fallback_uintptr n);
+
+#if FMT_GCC_VERSION || FMT_CLANG_VERSION
+# define FMT_ALWAYS_INLINE inline __attribute__((always_inline))
+#elif FMT_MSC_VER
+# define FMT_ALWAYS_INLINE __forceinline
+#else
+# define FMT_ALWAYS_INLINE inline
+#endif
+
+// To suppress unnecessary security cookie checks
+#if FMT_MSC_VER && !FMT_CLANG_VERSION
+# define FMT_SAFEBUFFERS __declspec(safebuffers)
+#else
+# define FMT_SAFEBUFFERS
+#endif
+
+#ifdef FMT_BUILTIN_CLZ
+// Optional version of count_digits for better performance on 32-bit platforms.
+inline int count_digits(uint32_t n) {
+ auto t = bsr2log10(FMT_BUILTIN_CLZ(n | 1) ^ 31);
+ return t - (n < data::zero_or_powers_of_10_32_new[t]);
+}
+#endif
+
+template <typename Int> constexpr int digits10() FMT_NOEXCEPT {
+ return std::numeric_limits<Int>::digits10;
+}
+template <> constexpr int digits10<int128_t>() FMT_NOEXCEPT { return 38; }
+template <> constexpr int digits10<uint128_t>() FMT_NOEXCEPT { return 38; }
+
+template <typename Char> FMT_API std::string grouping_impl(locale_ref loc);
+template <typename Char> inline std::string grouping(locale_ref loc) {
+ return grouping_impl<char>(loc);
+}
+template <> inline std::string grouping<wchar_t>(locale_ref loc) {
+ return grouping_impl<wchar_t>(loc);
+}
+
+template <typename Char> FMT_API Char thousands_sep_impl(locale_ref loc);
+template <typename Char> inline Char thousands_sep(locale_ref loc) {
+ return Char(thousands_sep_impl<char>(loc));
+}
+template <> inline wchar_t thousands_sep(locale_ref loc) {
+ return thousands_sep_impl<wchar_t>(loc);
+}
+
+template <typename Char> FMT_API Char decimal_point_impl(locale_ref loc);
+template <typename Char> inline Char decimal_point(locale_ref loc) {
+ return Char(decimal_point_impl<char>(loc));
+}
+template <> inline wchar_t decimal_point(locale_ref loc) {
+ return decimal_point_impl<wchar_t>(loc);
+}
+
+// Compares two characters for equality.
+template <typename Char> bool equal2(const Char* lhs, const char* rhs) {
+ return lhs[0] == rhs[0] && lhs[1] == rhs[1];
+}
+inline bool equal2(const char* lhs, const char* rhs) {
+ return memcmp(lhs, rhs, 2) == 0;
+}
+
+// Copies two characters from src to dst.
+template <typename Char> void copy2(Char* dst, const char* src) {
+ *dst++ = static_cast<Char>(*src++);
+ *dst = static_cast<Char>(*src);
+}
+FMT_INLINE void copy2(char* dst, const char* src) { memcpy(dst, src, 2); }
+
+template <typename Iterator> struct format_decimal_result {
+ Iterator begin;
+ Iterator end;
+};
+
+// Formats a decimal unsigned integer value writing into out pointing to a
+// buffer of specified size. The caller must ensure that the buffer is large
+// enough.
+template <typename Char, typename UInt>
+inline format_decimal_result<Char*> format_decimal(Char* out, UInt value,
+ int size) {
+ FMT_ASSERT(size >= count_digits(value), "invalid digit count");
+ out += size;
+ Char* end = out;
+ while (value >= 100) {
+ // Integer division is slow so do it for a group of two digits instead
+ // of for every digit. The idea comes from the talk by Alexandrescu
+ // "Three Optimization Tips for C++". See speed-test for a comparison.
+ out -= 2;
+ copy2(out, data::digits[value % 100]);
+ value /= 100;
+ }
+ if (value < 10) {
+ *--out = static_cast<Char>('0' + value);
+ return {out, end};
+ }
+ out -= 2;
+ copy2(out, data::digits[value]);
+ return {out, end};
+}
+
+template <typename Char, typename UInt, typename Iterator,
+ FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
+inline format_decimal_result<Iterator> format_decimal(Iterator out, UInt value,
+ int size) {
+ // Buffer is large enough to hold all digits (digits10 + 1).
+ Char buffer[digits10<UInt>() + 1];
+ auto end = format_decimal(buffer, value, size).end;
+ return {out, detail::copy_str<Char>(buffer, end, out)};
+}
+
+template <unsigned BASE_BITS, typename Char, typename UInt>
+inline Char* format_uint(Char* buffer, UInt value, int num_digits,
+ bool upper = false) {
+ buffer += num_digits;
+ Char* end = buffer;
+ do {
+ const char* digits = upper ? "0123456789ABCDEF" : data::hex_digits;
+ unsigned digit = (value & ((1 << BASE_BITS) - 1));
+ *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
+ : digits[digit]);
+ } while ((value >>= BASE_BITS) != 0);
+ return end;
+}
+
+template <unsigned BASE_BITS, typename Char>
+Char* format_uint(Char* buffer, detail::fallback_uintptr n, int num_digits,
+ bool = false) {
+ 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>(data::hex_digits[digit]);
+ value >>= BASE_BITS;
+ }
+ }
+ return buffer;
+}
+
+template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
+inline It format_uint(It out, UInt value, int num_digits, bool upper = false) {
+ if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
+ format_uint<BASE_BITS>(ptr, value, num_digits, upper);
+ return out;
+ }
+ // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
+ char buffer[num_bits<UInt>() / BASE_BITS + 1];
+ format_uint<BASE_BITS>(buffer, value, num_digits, upper);
+ return detail::copy_str<Char>(buffer, buffer + num_digits, out);
+}
+
+// A converter from UTF-8 to UTF-16.
+class utf8_to_utf16 {
+ private:
+ wmemory_buffer buffer_;
+
+ public:
+ FMT_API explicit utf8_to_utf16(string_view s);
+ operator wstring_view() const { return {&buffer_[0], size()}; }
+ size_t size() const { return buffer_.size() - 1; }
+ const wchar_t* c_str() const { return &buffer_[0]; }
+ std::wstring str() const { return {&buffer_[0], size()}; }
+};
+
+template <typename T = void> struct null {};
+
+// Workaround an array initialization issue in gcc 4.8.
+template <typename Char> struct fill_t {
+ private:
+ enum { max_size = 4 };
+ Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
+ unsigned char size_ = 1;
+
+ public:
+ FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
+ auto size = s.size();
+ if (size > max_size) {
+ FMT_THROW(format_error("invalid fill"));
+ return;
+ }
+ for (size_t i = 0; i < size; ++i) data_[i] = s[i];
+ size_ = static_cast<unsigned char>(size);
+ }
+
+ size_t size() const { return size_; }
+ const Char* data() const { return data_; }
+
+ FMT_CONSTEXPR Char& operator[](size_t index) { return data_[index]; }
+ FMT_CONSTEXPR const Char& operator[](size_t index) const {
+ return data_[index];
+ }
+};
+} // namespace detail
+
+// We cannot use enum classes as bit fields because of a gcc bug
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
+namespace align {
+enum type { none, left, right, center, numeric };
+}
+using align_t = align::type;
+
+namespace sign {
+enum type { none, minus, plus, space };
+}
+using sign_t = sign::type;
+
+// Format specifiers for built-in and string types.
+template <typename Char> struct basic_format_specs {
+ int width;
+ int precision;
+ char type;
+ align_t align : 4;
+ sign_t sign : 3;
+ bool alt : 1; // Alternate form ('#').
+ detail::fill_t<Char> fill;
+
+ constexpr basic_format_specs()
+ : width(0),
+ precision(-1),
+ type(0),
+ align(align::none),
+ sign(sign::none),
+ alt(false) {}
+};
+
+using format_specs = basic_format_specs<char>;
+
+namespace detail {
+namespace dragonbox {
+
+// Type-specific information that Dragonbox uses.
+template <class T> 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 shorter_interval_tie_lower_threshold = -77;
+ static const int shorter_interval_tie_upper_threshold = -77;
+ static const int max_trailing_zeros = 16;
+};
+
+template <typename T> struct decimal_fp {
+ using significand_type = typename float_info<T>::carrier_uint;
+ significand_type significand;
+ int exponent;
+};
+
+template <typename T> FMT_API decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT;
+} // namespace dragonbox
+
+template <typename T>
+constexpr typename dragonbox::float_info<T>::carrier_uint exponent_mask() {
+ 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;
+}
+
+// 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 use_grisu : 1;
+ bool showpoint : 1;
+};
+
+// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
+template <typename Char, typename It> It write_exponent(int exp, It it) {
+ FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
+ if (exp < 0) {
+ *it++ = static_cast<Char>('-');
+ exp = -exp;
+ } else {
+ *it++ = static_cast<Char>('+');
+ }
+ if (exp >= 100) {
+ const char* top = data::digits[exp / 100];
+ if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
+ *it++ = static_cast<Char>(top[1]);
+ exp %= 100;
+ }
+ const char* d = data::digits[exp];
+ *it++ = static_cast<Char>(d[0]);
+ *it++ = static_cast<Char>(d[1]);
+ return it;
+}
+
+template <typename T>
+int format_float(T value, int precision, float_specs specs, buffer<char>& buf);
+
+// Formats a floating-point number with snprintf.
+template <typename T>
+int snprintf_float(T value, int precision, float_specs specs,
+ buffer<char>& buf);
+
+template <typename T> T promote_float(T value) { return value; }
+inline double promote_float(float value) { return static_cast<double>(value); }
+
+template <typename Handler>
+FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler&& handler) {
+ switch (spec) {
+ case 0:
+ case 'd':
+ handler.on_dec();
+ break;
+ case 'x':
+ case 'X':
+ handler.on_hex();
+ break;
+ case 'b':
+ case 'B':
+ handler.on_bin();
+ break;
+ case 'o':
+ handler.on_oct();
+ break;
+#ifdef FMT_DEPRECATED_N_SPECIFIER
+ case 'n':
+#endif
+ case 'L':
+ handler.on_num();
+ break;
+ case 'c':
+ handler.on_chr();
+ break;
+ default:
+ handler.on_error();
+ }
+}
+
+template <typename ErrorHandler = error_handler, typename Char>
+FMT_CONSTEXPR float_specs parse_float_type_spec(
+ const basic_format_specs<Char>& specs, ErrorHandler&& eh = {}) {
+ auto result = float_specs();
+ result.showpoint = specs.alt;
+ switch (specs.type) {
+ case 0:
+ result.format = float_format::general;
+ result.showpoint |= specs.precision > 0;
+ break;
+ case 'G':
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case 'g':
+ result.format = float_format::general;
+ break;
+ case 'E':
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case 'e':
+ result.format = float_format::exp;
+ result.showpoint |= specs.precision != 0;
+ break;
+ case 'F':
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case 'f':
+ result.format = float_format::fixed;
+ result.showpoint |= specs.precision != 0;
+ break;
+ case 'A':
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case 'a':
+ result.format = float_format::hex;
+ break;
+#ifdef FMT_DEPRECATED_N_SPECIFIER
+ case 'n':
+#endif
+ case 'L':
+ result.locale = true;
+ break;
+ default:
+ eh.on_error("invalid type specifier");
+ break;
+ }
+ return result;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR void handle_char_specs(const basic_format_specs<Char>* specs,
+ Handler&& handler) {
+ if (!specs) return handler.on_char();
+ if (specs->type && specs->type != 'c') return handler.on_int();
+ if (specs->align == align::numeric || specs->sign != sign::none || specs->alt)
+ handler.on_error("invalid format specifier for char");
+ handler.on_char();
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler&& handler) {
+ if (spec == 0 || spec == 's')
+ handler.on_string();
+ else if (spec == 'p')
+ handler.on_pointer();
+ else
+ handler.on_error("invalid type specifier");
+}
+
+template <typename Char, typename ErrorHandler>
+FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler&& eh) {
+ if (spec != 0 && spec != 's') eh.on_error("invalid type specifier");
+}
+
+template <typename Char, typename ErrorHandler>
+FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler&& eh) {
+ if (spec != 0 && spec != 'p') eh.on_error("invalid type specifier");
+}
+
+template <typename ErrorHandler> class int_type_checker : private ErrorHandler {
+ public:
+ FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {}
+
+ FMT_CONSTEXPR void on_dec() {}
+ FMT_CONSTEXPR void on_hex() {}
+ FMT_CONSTEXPR void on_bin() {}
+ FMT_CONSTEXPR void on_oct() {}
+ FMT_CONSTEXPR void on_num() {}
+ FMT_CONSTEXPR void on_chr() {}
+
+ FMT_CONSTEXPR void on_error() {
+ ErrorHandler::on_error("invalid type specifier");
+ }
+};
+
+template <typename ErrorHandler>
+class char_specs_checker : public ErrorHandler {
+ private:
+ char type_;
+
+ public:
+ FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh)
+ : ErrorHandler(eh), type_(type) {}
+
+ FMT_CONSTEXPR void on_int() {
+ handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this));
+ }
+ FMT_CONSTEXPR void on_char() {}
+};
+
+template <typename ErrorHandler>
+class cstring_type_checker : public ErrorHandler {
+ public:
+ FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh)
+ : ErrorHandler(eh) {}
+
+ FMT_CONSTEXPR void on_string() {}
+ FMT_CONSTEXPR void on_pointer() {}
+};
+
+template <typename OutputIt, typename Char>
+FMT_NOINLINE OutputIt fill(OutputIt it, size_t n, const fill_t<Char>& fill) {
+ auto fill_size = fill.size();
+ if (fill_size == 1) return std::fill_n(it, n, fill[0]);
+ for (size_t i = 0; i < n; ++i) it = std::copy_n(fill.data(), fill_size, it);
+ return it;
+}
+
+// Writes the output of f, padded according to format specifications in specs.
+// size: output size in code units.
+// width: output display width in (terminal) column positions.
+template <align::type align = align::left, typename OutputIt, typename Char,
+ typename F>
+inline OutputIt write_padded(OutputIt out,
+ const basic_format_specs<Char>& specs, size_t size,
+ size_t width, F&& f) {
+ static_assert(align == align::left || align == align::right, "");
+ unsigned spec_width = to_unsigned(specs.width);
+ size_t padding = spec_width > width ? spec_width - width : 0;
+ auto* shifts = align == align::left ? data::left_padding_shifts
+ : data::right_padding_shifts;
+ size_t left_padding = padding >> shifts[specs.align];
+ auto it = reserve(out, size + padding * specs.fill.size());
+ it = fill(it, left_padding, specs.fill);
+ it = f(it);
+ it = fill(it, padding - left_padding, specs.fill);
+ return base_iterator(out, it);
+}
+
+template <align::type align = align::left, typename OutputIt, typename Char,
+ typename F>
+inline OutputIt write_padded(OutputIt out,
+ const basic_format_specs<Char>& specs, size_t size,
+ F&& f) {
+ return write_padded<align>(out, specs, size, size, f);
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write_bytes(OutputIt out, string_view bytes,
+ const basic_format_specs<Char>& specs) {
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+ return write_padded(out, specs, bytes.size(), [bytes](iterator it) {
+ const char* data = bytes.data();
+ return copy_str<Char>(data, data + bytes.size(), it);
+ });
+}
+
+// Data for write_int that doesn't depend on output iterator type. It is used to
+// avoid template code bloat.
+template <typename Char> struct write_int_data {
+ size_t size;
+ size_t padding;
+
+ write_int_data(int num_digits, string_view prefix,
+ const basic_format_specs<Char>& specs)
+ : size(prefix.size() + to_unsigned(num_digits)), padding(0) {
+ if (specs.align == align::numeric) {
+ auto width = to_unsigned(specs.width);
+ if (width > size) {
+ padding = width - size;
+ size = width;
+ }
+ } else if (specs.precision > num_digits) {
+ size = prefix.size() + to_unsigned(specs.precision);
+ padding = to_unsigned(specs.precision - num_digits);
+ }
+ }
+};
+
+// Writes an integer in the format
+// <left-padding><prefix><numeric-padding><digits><right-padding>
+// where <digits> are written by f(it).
+template <typename OutputIt, typename Char, typename F>
+OutputIt write_int(OutputIt out, int num_digits, string_view prefix,
+ const basic_format_specs<Char>& specs, F f) {
+ auto data = write_int_data<Char>(num_digits, prefix, specs);
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+ return write_padded<align::right>(out, specs, data.size, [=](iterator it) {
+ if (prefix.size() != 0)
+ it = copy_str<Char>(prefix.begin(), prefix.end(), it);
+ it = std::fill_n(it, data.padding, static_cast<Char>('0'));
+ return f(it);
+ });
+}
+
+template <typename StrChar, typename Char, typename OutputIt>
+OutputIt write(OutputIt out, basic_string_view<StrChar> s,
+ const basic_format_specs<Char>& specs) {
+ 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
+ ? count_code_points(basic_string_view<StrChar>(data, size))
+ : 0;
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+ return write_padded(out, specs, size, width, [=](iterator it) {
+ return copy_str<Char>(data, data + size, it);
+ });
+}
+
+// The handle_int_type_spec handler that writes an integer.
+template <typename OutputIt, typename Char, typename UInt> struct int_writer {
+ OutputIt out;
+ locale_ref locale;
+ const basic_format_specs<Char>& specs;
+ UInt abs_value;
+ char prefix[4];
+ unsigned prefix_size;
+
+ using iterator =
+ remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
+
+ string_view get_prefix() const { return string_view(prefix, prefix_size); }
+
+ template <typename Int>
+ int_writer(OutputIt output, locale_ref loc, Int value,
+ const basic_format_specs<Char>& s)
+ : out(output),
+ locale(loc),
+ specs(s),
+ abs_value(static_cast<UInt>(value)),
+ prefix_size(0) {
+ static_assert(std::is_same<uint32_or_64_or_128_t<Int>, UInt>::value, "");
+ if (is_negative(value)) {
+ prefix[0] = '-';
+ ++prefix_size;
+ abs_value = 0 - abs_value;
+ } else if (specs.sign != sign::none && specs.sign != sign::minus) {
+ prefix[0] = specs.sign == sign::plus ? '+' : ' ';
+ ++prefix_size;
+ }
+ }
+
+ void on_dec() {
+ auto num_digits = count_digits(abs_value);
+ out = write_int(
+ out, num_digits, get_prefix(), specs, [this, num_digits](iterator it) {
+ return format_decimal<Char>(it, abs_value, num_digits).end;
+ });
+ }
+
+ void on_hex() {
+ if (specs.alt) {
+ prefix[prefix_size++] = '0';
+ prefix[prefix_size++] = specs.type;
+ }
+ int num_digits = count_digits<4>(abs_value);
+ out = write_int(out, num_digits, get_prefix(), specs,
+ [this, num_digits](iterator it) {
+ return format_uint<4, Char>(it, abs_value, num_digits,
+ specs.type != 'x');
+ });
+ }
+
+ void on_bin() {
+ if (specs.alt) {
+ prefix[prefix_size++] = '0';
+ prefix[prefix_size++] = static_cast<char>(specs.type);
+ }
+ int num_digits = count_digits<1>(abs_value);
+ out = write_int(out, num_digits, get_prefix(), specs,
+ [this, num_digits](iterator it) {
+ return format_uint<1, Char>(it, abs_value, num_digits);
+ });
+ }
+
+ void on_oct() {
+ int num_digits = count_digits<3>(abs_value);
+ if (specs.alt && specs.precision <= num_digits && abs_value != 0) {
+ // Octal prefix '0' is counted as a digit, so only add it if precision
+ // is not greater than the number of digits.
+ prefix[prefix_size++] = '0';
+ }
+ out = write_int(out, num_digits, get_prefix(), specs,
+ [this, num_digits](iterator it) {
+ return format_uint<3, Char>(it, abs_value, num_digits);
+ });
+ }
+
+ enum { sep_size = 1 };
+
+ void on_num() {
+ std::string groups = grouping<Char>(locale);
+ if (groups.empty()) return on_dec();
+ auto sep = thousands_sep<Char>(locale);
+ if (!sep) return on_dec();
+ int num_digits = count_digits(abs_value);
+ int size = num_digits, n = num_digits;
+ std::string::const_iterator group = groups.cbegin();
+ while (group != groups.cend() && n > *group && *group > 0 &&
+ *group != max_value<char>()) {
+ size += sep_size;
+ n -= *group;
+ ++group;
+ }
+ if (group == groups.cend()) size += sep_size * ((n - 1) / groups.back());
+ char digits[40];
+ format_decimal(digits, abs_value, num_digits);
+ basic_memory_buffer<Char> buffer;
+ size += static_cast<int>(prefix_size);
+ const auto usize = to_unsigned(size);
+ buffer.resize(usize);
+ basic_string_view<Char> s(&sep, sep_size);
+ // Index of a decimal digit with the least significant digit having index 0.
+ int digit_index = 0;
+ group = groups.cbegin();
+ auto p = buffer.data() + size - 1;
+ for (int i = num_digits - 1; i > 0; --i) {
+ *p-- = static_cast<Char>(digits[i]);
+ if (*group <= 0 || ++digit_index % *group != 0 ||
+ *group == max_value<char>())
+ continue;
+ if (group + 1 != groups.cend()) {
+ digit_index = 0;
+ ++group;
+ }
+ std::uninitialized_copy(s.data(), s.data() + s.size(),
+ make_checked(p, s.size()));
+ p -= s.size();
+ }
+ *p-- = static_cast<Char>(*digits);
+ if (prefix_size != 0) *p = static_cast<Char>('-');
+ auto data = buffer.data();
+ out = write_padded<align::right>(
+ out, specs, usize, usize,
+ [=](iterator it) { return copy_str<Char>(data, data + size, it); });
+ }
+
+ void on_chr() { *out++ = static_cast<Char>(abs_value); }
+
+ FMT_NORETURN void on_error() {
+ FMT_THROW(format_error("invalid type specifier"));
+ }
+};
+
+template <typename Char, typename OutputIt>
+OutputIt write_nonfinite(OutputIt out, bool isinf,
+ const basic_format_specs<Char>& specs,
+ const float_specs& fspecs) {
+ auto str =
+ isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
+ constexpr size_t str_size = 3;
+ auto sign = fspecs.sign;
+ auto size = str_size + (sign ? 1 : 0);
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+ return write_padded(out, specs, size, [=](iterator it) {
+ if (sign) *it++ = static_cast<Char>(data::signs[sign]);
+ return copy_str<Char>(str, str + str_size, it);
+ });
+}
+
+// A decimal floating-point number significand * pow(10, exp).
+struct big_decimal_fp {
+ const char* significand;
+ int significand_size;
+ int exponent;
+};
+
+inline int get_significand_size(const big_decimal_fp& fp) {
+ return fp.significand_size;
+}
+template <typename T>
+inline int get_significand_size(const dragonbox::decimal_fp<T>& fp) {
+ return count_digits(fp.significand);
+}
+
+template <typename Char, typename OutputIt>
+inline OutputIt write_significand(OutputIt out, const char* significand,
+ int& significand_size) {
+ return copy_str<Char>(significand, significand + significand_size, out);
+}
+template <typename Char, typename OutputIt, typename UInt>
+inline OutputIt write_significand(OutputIt out, UInt significand,
+ int significand_size) {
+ return format_decimal<Char>(out, significand, significand_size).end;
+}
+
+template <typename Char, typename UInt,
+ FMT_ENABLE_IF(std::is_integral<UInt>::value)>
+inline Char* write_significand(Char* out, UInt significand,
+ int significand_size, int integral_size,
+ Char decimal_point) {
+ if (!decimal_point)
+ return format_decimal(out, significand, significand_size).end;
+ auto end = format_decimal(out + 1, significand, significand_size).end;
+ if (integral_size == 1)
+ out[0] = out[1];
+ else
+ std::copy_n(out + 1, integral_size, out);
+ out[integral_size] = decimal_point;
+ return end;
+}
+
+template <typename OutputIt, typename UInt, typename Char,
+ FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
+inline OutputIt write_significand(OutputIt out, UInt significand,
+ int significand_size, int integral_size,
+ Char decimal_point) {
+ // Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
+ Char buffer[digits10<UInt>() + 2];
+ auto end = write_significand(buffer, significand, significand_size,
+ integral_size, decimal_point);
+ return detail::copy_str<Char>(buffer, end, out);
+}
+
+template <typename OutputIt, typename Char>
+inline OutputIt write_significand(OutputIt out, const char* significand,
+ int significand_size, int integral_size,
+ Char decimal_point) {
+ out = detail::copy_str<Char>(significand, significand + integral_size, out);
+ if (!decimal_point) return out;
+ *out++ = decimal_point;
+ return detail::copy_str<Char>(significand + integral_size,
+ significand + significand_size, out);
+}
+
+template <typename OutputIt, typename DecimalFP, typename Char>
+OutputIt write_float(OutputIt out, const DecimalFP& fp,
+ const basic_format_specs<Char>& specs, float_specs fspecs,
+ Char decimal_point) {
+ auto significand = fp.significand;
+ int significand_size = get_significand_size(fp);
+ static const Char zero = static_cast<Char>('0');
+ auto sign = fspecs.sign;
+ size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+
+ int output_exp = fp.exponent + significand_size - 1;
+ auto use_exp_format = [=]() {
+ if (fspecs.format == float_format::exp) return true;
+ if (fspecs.format != float_format::general) return false;
+ // Use the fixed notation if the exponent is in [exp_lower, exp_upper),
+ // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
+ const int exp_lower = -4, exp_upper = 16;
+ return output_exp < exp_lower ||
+ output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
+ };
+ if (use_exp_format()) {
+ int num_zeros = 0;
+ if (fspecs.showpoint) {
+ num_zeros = (std::max)(fspecs.precision - significand_size, 0);
+ size += to_unsigned(num_zeros);
+ } else if (significand_size == 1) {
+ decimal_point = Char();
+ }
+ auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
+ int exp_digits = 2;
+ if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
+
+ size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
+ char exp_char = fspecs.upper ? 'E' : 'e';
+ auto write = [=](iterator it) {
+ if (sign) *it++ = static_cast<Char>(data::signs[sign]);
+ // Insert a decimal point after the first digit and add an exponent.
+ it = write_significand(it, significand, significand_size, 1,
+ decimal_point);
+ if (num_zeros > 0) it = std::fill_n(it, num_zeros, zero);
+ *it++ = static_cast<Char>(exp_char);
+ return write_exponent<Char>(output_exp, it);
+ };
+ return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
+ : base_iterator(out, write(reserve(out, size)));
+ }
+
+ int exp = fp.exponent + significand_size;
+ if (fp.exponent >= 0) {
+ // 1234e5 -> 123400000[.0+]
+ size += to_unsigned(fp.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
+ if (fspecs.showpoint) {
+ if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 1;
+ if (num_zeros > 0) size += to_unsigned(num_zeros);
+ }
+ return write_padded<align::right>(out, specs, size, [&](iterator it) {
+ if (sign) *it++ = static_cast<Char>(data::signs[sign]);
+ it = write_significand<Char>(it, significand, significand_size);
+ it = std::fill_n(it, fp.exponent, zero);
+ if (!fspecs.showpoint) return it;
+ *it++ = decimal_point;
+ return num_zeros > 0 ? std::fill_n(it, num_zeros, zero) : it;
+ });
+ } else if (exp > 0) {
+ // 1234e-2 -> 12.34[0+]
+ int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
+ size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
+ return write_padded<align::right>(out, specs, size, [&](iterator it) {
+ if (sign) *it++ = static_cast<Char>(data::signs[sign]);
+ it = write_significand(it, significand, significand_size, exp,
+ decimal_point);
+ return num_zeros > 0 ? std::fill_n(it, num_zeros, zero) : it;
+ });
+ }
+ // 1234e-6 -> 0.001234
+ int num_zeros = -exp;
+ if (significand_size == 0 && fspecs.precision >= 0 &&
+ fspecs.precision < num_zeros) {
+ num_zeros = fspecs.precision;
+ }
+ size += 2 + to_unsigned(num_zeros);
+ return write_padded<align::right>(out, specs, size, [&](iterator it) {
+ if (sign) *it++ = static_cast<Char>(data::signs[sign]);
+ *it++ = zero;
+ if (num_zeros == 0 && significand_size == 0 && !fspecs.showpoint) return it;
+ *it++ = decimal_point;
+ it = std::fill_n(it, num_zeros, zero);
+ return write_significand<Char>(it, significand, significand_size);
+ });
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+OutputIt write(OutputIt out, T value, basic_format_specs<Char> specs,
+ locale_ref loc = {}) {
+ if (const_check(!is_supported_floating_point(value))) return out;
+ float_specs fspecs = parse_float_type_spec(specs);
+ fspecs.sign = specs.sign;
+ if (std::signbit(value)) { // value < 0 is false for NaN so use signbit.
+ fspecs.sign = sign::minus;
+ value = -value;
+ } else if (fspecs.sign == sign::minus) {
+ fspecs.sign = sign::none;
+ }
+
+ if (!std::isfinite(value))
+ return write_nonfinite(out, std::isinf(value), specs, fspecs);
+
+ if (specs.align == align::numeric && fspecs.sign) {
+ auto it = reserve(out, 1);
+ *it++ = static_cast<Char>(data::signs[fspecs.sign]);
+ out = base_iterator(out, it);
+ fspecs.sign = sign::none;
+ if (specs.width != 0) --specs.width;
+ }
+
+ memory_buffer buffer;
+ if (fspecs.format == float_format::hex) {
+ if (fspecs.sign) buffer.push_back(data::signs[fspecs.sign]);
+ snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
+ return write_bytes(out, {buffer.data(), buffer.size()}, specs);
+ }
+ int precision = specs.precision >= 0 || !specs.type ? specs.precision : 6;
+ if (fspecs.format == float_format::exp) {
+ if (precision == max_value<int>())
+ FMT_THROW(format_error("number is too big"));
+ else
+ ++precision;
+ }
+ if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
+ fspecs.use_grisu = is_fast_float<T>();
+ int exp = format_float(promote_float(value), precision, fspecs, buffer);
+ fspecs.precision = precision;
+ Char point =
+ fspecs.locale ? decimal_point<Char>(loc) : static_cast<Char>('.');
+ auto fp = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
+ return write_float(out, fp, specs, fspecs, point);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_fast_float<T>::value)>
+OutputIt write(OutputIt out, T value) {
+ 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();
+ auto sign_bit = bits & (uint(1) << (num_bits<uint>() - 1));
+ if (sign_bit != 0) {
+ fspecs.sign = sign::minus;
+ value = -value;
+ }
+
+ static const auto specs = basic_format_specs<Char>();
+ uint mask = exponent_mask<floaty>();
+ if ((bits & mask) == mask)
+ return write_nonfinite(out, std::isinf(value), specs, fspecs);
+
+ auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
+ return write_float(out, dec, specs, fspecs, static_cast<Char>('.'));
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(std::is_floating_point<T>::value &&
+ !is_fast_float<T>::value)>
+inline OutputIt write(OutputIt out, T value) {
+ return write(out, value, basic_format_specs<Char>());
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write_char(OutputIt out, Char value,
+ const basic_format_specs<Char>& specs) {
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+ return write_padded(out, specs, 1, [=](iterator it) {
+ *it++ = value;
+ return it;
+ });
+}
+
+template <typename Char, typename OutputIt, typename UIntPtr>
+OutputIt write_ptr(OutputIt out, UIntPtr value,
+ const basic_format_specs<Char>* specs) {
+ int num_digits = count_digits<4>(value);
+ auto size = to_unsigned(num_digits) + size_t(2);
+ using iterator = remove_reference_t<decltype(reserve(out, 0))>;
+ auto write = [=](iterator it) {
+ *it++ = static_cast<Char>('0');
+ *it++ = static_cast<Char>('x');
+ return format_uint<4, Char>(it, value, num_digits);
+ };
+ return specs ? write_padded<align::right>(out, *specs, size, write)
+ : base_iterator(out, write(reserve(out, size)));
+}
+
+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 Char, typename OutputIt>
+OutputIt write(OutputIt out, monostate) {
+ FMT_ASSERT(false, "");
+ return out;
+}
+
+template <typename Char, typename OutputIt,
+ FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+OutputIt write(OutputIt out, string_view value) {
+ auto it = reserve(out, value.size());
+ it = copy_str<Char>(value.begin(), value.end(), it);
+ return base_iterator(out, it);
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write(OutputIt out, basic_string_view<Char> value) {
+ auto it = reserve(out, value.size());
+ it = std::copy(value.begin(), value.end(), it);
+ return base_iterator(out, it);
+}
+
+template <typename Char>
+buffer_appender<Char> write(buffer_appender<Char> out,
+ basic_string_view<Char> value) {
+ get_container(out).append(value.begin(), value.end());
+ return out;
+}
+
+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)>
+OutputIt write(OutputIt out, T value) {
+ 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);
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write(OutputIt out, bool value) {
+ return write<Char>(out, string_view(value ? "true" : "false"));
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write(OutputIt out, Char value) {
+ auto it = reserve(out, 1);
+ *it++ = value;
+ return base_iterator(out, it);
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write(OutputIt out, const Char* value) {
+ if (!value) {
+ FMT_THROW(format_error("string pointer is null"));
+ } else {
+ auto length = std::char_traits<Char>::length(value);
+ out = write(out, basic_string_view<Char>(value, length));
+ }
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+OutputIt write(OutputIt out, const void* value) {
+ return write_ptr<Char>(out, to_uintptr(value), nullptr);
+}
+
+template <typename Char, typename OutputIt, typename T>
+auto write(OutputIt out, const T& value) -> typename std::enable_if<
+ mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value ==
+ type::custom_type,
+ OutputIt>::type {
+ using context_type = basic_format_context<OutputIt, Char>;
+ using formatter_type =
+ conditional_t<has_formatter<T, context_type>::value,
+ typename context_type::template formatter_type<T>,
+ fallback_formatter<T, Char>>;
+ context_type ctx(out, {}, {});
+ return formatter_type().format(value, ctx);
+}
+
+// An argument visitor that formats the argument and writes it via the output
+// iterator. It's a class and not a generic lambda for compatibility with C++11.
+template <typename OutputIt, typename Char> struct default_arg_formatter {
+ using context = basic_format_context<OutputIt, Char>;
+
+ OutputIt out;
+ basic_format_args<context> args;
+ locale_ref loc;
+
+ template <typename T> OutputIt operator()(T value) {
+ return write<Char>(out, value);
+ }
+
+ OutputIt operator()(typename basic_format_arg<context>::handle handle) {
+ basic_format_parse_context<Char> parse_ctx({});
+ basic_format_context<OutputIt, Char> format_ctx(out, args, loc);
+ handle.format(parse_ctx, format_ctx);
+ return format_ctx.out();
+ }
+};
+
+template <typename OutputIt, typename Char,
+ typename ErrorHandler = error_handler>
+class arg_formatter_base {
+ public:
+ using iterator = OutputIt;
+ using char_type = Char;
+ using format_specs = basic_format_specs<Char>;
+
+ private:
+ iterator out_;
+ locale_ref locale_;
+ format_specs* specs_;
+
+ // Attempts to reserve space for n extra characters in the output range.
+ // Returns a pointer to the reserved range or a reference to out_.
+ auto reserve(size_t n) -> decltype(detail::reserve(out_, n)) {
+ return detail::reserve(out_, n);
+ }
+
+ using reserve_iterator = remove_reference_t<decltype(
+ detail::reserve(std::declval<iterator&>(), 0))>;
+
+ template <typename T> void write_int(T value, const format_specs& spec) {
+ using uint_type = uint32_or_64_or_128_t<T>;
+ int_writer<iterator, Char, uint_type> w(out_, locale_, value, spec);
+ handle_int_type_spec(spec.type, w);
+ out_ = w.out;
+ }
+
+ void write(char value) {
+ auto&& it = reserve(1);
+ *it++ = value;
+ }
+
+ template <typename Ch, FMT_ENABLE_IF(std::is_same<Ch, Char>::value)>
+ void write(Ch value) {
+ out_ = detail::write<Char>(out_, value);
+ }
+
+ void write(string_view value) {
+ auto&& it = reserve(value.size());
+ it = copy_str<Char>(value.begin(), value.end(), it);
+ }
+ void write(wstring_view value) {
+ static_assert(std::is_same<Char, wchar_t>::value, "");
+ auto&& it = reserve(value.size());
+ it = std::copy(value.begin(), value.end(), it);
+ }
+
+ template <typename Ch>
+ void write(const Ch* s, size_t size, const format_specs& specs) {
+ auto width = specs.width != 0
+ ? count_code_points(basic_string_view<Ch>(s, size))
+ : 0;
+ out_ = write_padded(out_, specs, size, width, [=](reserve_iterator it) {
+ return copy_str<Char>(s, s + size, it);
+ });
+ }
+
+ template <typename Ch>
+ void write(basic_string_view<Ch> s, const format_specs& specs = {}) {
+ out_ = detail::write(out_, s, specs);
+ }
+
+ void write_pointer(const void* p) {
+ out_ = write_ptr<char_type>(out_, to_uintptr(p), specs_);
+ }
+
+ struct char_spec_handler : ErrorHandler {
+ arg_formatter_base& formatter;
+ Char value;
+
+ char_spec_handler(arg_formatter_base& f, Char val)
+ : formatter(f), value(val) {}
+
+ void on_int() {
+ // char is only formatted as int if there are specs.
+ formatter.write_int(static_cast<int>(value), *formatter.specs_);
+ }
+ void on_char() {
+ if (formatter.specs_)
+ formatter.out_ = write_char(formatter.out_, value, *formatter.specs_);
+ else
+ formatter.write(value);
+ }
+ };
+
+ struct cstring_spec_handler : error_handler {
+ arg_formatter_base& formatter;
+ const Char* value;
+
+ cstring_spec_handler(arg_formatter_base& f, const Char* val)
+ : formatter(f), value(val) {}
+
+ void on_string() { formatter.write(value); }
+ void on_pointer() { formatter.write_pointer(value); }
+ };
+
+ protected:
+ iterator out() { return out_; }
+ format_specs* specs() { return specs_; }
+
+ void write(bool value) {
+ if (specs_)
+ write(string_view(value ? "true" : "false"), *specs_);
+ else
+ out_ = detail::write<Char>(out_, value);
+ }
+
+ void write(const Char* value) {
+ if (!value) {
+ FMT_THROW(format_error("string pointer is null"));
+ } else {
+ auto length = std::char_traits<char_type>::length(value);
+ basic_string_view<char_type> sv(value, length);
+ specs_ ? write(sv, *specs_) : write(sv);
+ }
+ }
+
+ public:
+ arg_formatter_base(OutputIt out, format_specs* s, locale_ref loc)
+ : out_(out), locale_(loc), specs_(s) {}
+
+ iterator operator()(monostate) {
+ FMT_ASSERT(false, "invalid argument type");
+ return out_;
+ }
+
+ template <typename T, FMT_ENABLE_IF(is_integral<T>::value)>
+ FMT_INLINE iterator operator()(T value) {
+ if (specs_)
+ write_int(value, *specs_);
+ else
+ out_ = detail::write<Char>(out_, value);
+ return out_;
+ }
+
+ iterator operator()(Char value) {
+ handle_char_specs(specs_,
+ char_spec_handler(*this, static_cast<Char>(value)));
+ return out_;
+ }
+
+ iterator operator()(bool value) {
+ if (specs_ && specs_->type) return (*this)(value ? 1 : 0);
+ write(value != 0);
+ return out_;
+ }
+
+ template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+ iterator operator()(T value) {
+ auto specs = specs_ ? *specs_ : format_specs();
+ if (const_check(is_supported_floating_point(value)))
+ out_ = detail::write(out_, value, specs, locale_);
+ else
+ FMT_ASSERT(false, "unsupported float argument type");
+ return out_;
+ }
+
+ iterator operator()(const Char* value) {
+ if (!specs_) return write(value), out_;
+ handle_cstring_type_spec(specs_->type, cstring_spec_handler(*this, value));
+ return out_;
+ }
+
+ iterator operator()(basic_string_view<Char> value) {
+ if (specs_) {
+ check_string_type_spec(specs_->type, error_handler());
+ write(value, *specs_);
+ } else {
+ write(value);
+ }
+ return out_;
+ }
+
+ iterator operator()(const void* value) {
+ if (specs_) check_pointer_type_spec(specs_->type, error_handler());
+ write_pointer(value);
+ return out_;
+ }
+};
+
+/** The default argument formatter. */
+template <typename OutputIt, typename Char>
+class arg_formatter : public arg_formatter_base<OutputIt, Char> {
+ private:
+ using char_type = Char;
+ using base = arg_formatter_base<OutputIt, Char>;
+ using context_type = basic_format_context<OutputIt, Char>;
+
+ context_type& ctx_;
+ basic_format_parse_context<char_type>* parse_ctx_;
+ const Char* ptr_;
+
+ public:
+ using iterator = typename base::iterator;
+ using format_specs = typename base::format_specs;
+
+ /**
+ \rst
+ Constructs an argument formatter object.
+ *ctx* is a reference to the formatting context,
+ *specs* contains format specifier information for standard argument types.
+ \endrst
+ */
+ explicit arg_formatter(
+ context_type& ctx,
+ basic_format_parse_context<char_type>* parse_ctx = nullptr,
+ format_specs* specs = nullptr, const Char* ptr = nullptr)
+ : base(ctx.out(), specs, ctx.locale()),
+ ctx_(ctx),
+ parse_ctx_(parse_ctx),
+ ptr_(ptr) {}
+
+ using base::operator();
+
+ /** Formats an argument of a user-defined type. */
+ iterator operator()(typename basic_format_arg<context_type>::handle handle) {
+ if (ptr_) advance_to(*parse_ctx_, ptr_);
+ handle.format(*parse_ctx_, ctx_);
+ return ctx_.out();
+ }
+};
+
+template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
+ return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
+}
+
+// Parses the range [begin, end) as an unsigned integer. This function assumes
+// that the range is non-empty and the first character is a digit.
+template <typename Char, typename ErrorHandler>
+FMT_CONSTEXPR int parse_nonnegative_int(const Char*& begin, const Char* end,
+ ErrorHandler&& eh) {
+ FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
+ unsigned value = 0;
+ // Convert to unsigned to prevent a warning.
+ constexpr unsigned max_int = max_value<int>();
+ unsigned big = max_int / 10;
+ do {
+ // Check for overflow.
+ if (value > big) {
+ value = max_int + 1;
+ break;
+ }
+ value = value * 10 + unsigned(*begin - '0');
+ ++begin;
+ } while (begin != end && '0' <= *begin && *begin <= '9');
+ if (value > max_int) eh.on_error("number is too big");
+ return static_cast<int>(value);
+}
+
+template <typename Context> class custom_formatter {
+ private:
+ using char_type = typename Context::char_type;
+
+ basic_format_parse_context<char_type>& parse_ctx_;
+ Context& ctx_;
+
+ public:
+ explicit custom_formatter(basic_format_parse_context<char_type>& parse_ctx,
+ Context& ctx)
+ : parse_ctx_(parse_ctx), ctx_(ctx) {}
+
+ void operator()(typename basic_format_arg<Context>::handle h) const {
+ h.format(parse_ctx_, ctx_);
+ }
+
+ 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) {}
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T value) {
+ if (is_negative(value)) handler_.on_error("negative width");
+ return static_cast<unsigned long long>(value);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T) {
+ handler_.on_error("width is not integer");
+ return 0;
+ }
+
+ private:
+ ErrorHandler& handler_;
+};
+
+template <typename ErrorHandler> class precision_checker {
+ public:
+ explicit FMT_CONSTEXPR precision_checker(ErrorHandler& eh) : handler_(eh) {}
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T value) {
+ if (is_negative(value)) handler_.on_error("negative precision");
+ return static_cast<unsigned long long>(value);
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ FMT_CONSTEXPR unsigned long long operator()(T) {
+ handler_.on_error("precision is not integer");
+ return 0;
+ }
+
+ private:
+ ErrorHandler& handler_;
+};
+
+// A format specifier handler that sets fields in basic_format_specs.
+template <typename Char> class specs_setter {
+ 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_plus() { specs_.sign = sign::plus; }
+ FMT_CONSTEXPR void on_minus() { specs_.sign = sign::minus; }
+ FMT_CONSTEXPR void on_space() { specs_.sign = sign::space; }
+ FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
+
+ FMT_CONSTEXPR void on_zero() {
+ specs_.align = align::numeric;
+ specs_.fill[0] = Char('0');
+ }
+
+ FMT_CONSTEXPR void on_width(int width) { specs_.width = width; }
+ FMT_CONSTEXPR void on_precision(int precision) {
+ specs_.precision = precision;
+ }
+ FMT_CONSTEXPR void end_precision() {}
+
+ FMT_CONSTEXPR void on_type(Char type) {
+ specs_.type = static_cast<char>(type);
+ }
+
+ protected:
+ basic_format_specs<Char>& specs_;
+};
+
+template <typename ErrorHandler> class numeric_specs_checker {
+ public:
+ FMT_CONSTEXPR numeric_specs_checker(ErrorHandler& eh, detail::type arg_type)
+ : error_handler_(eh), arg_type_(arg_type) {}
+
+ FMT_CONSTEXPR void require_numeric_argument() {
+ if (!is_arithmetic_type(arg_type_))
+ error_handler_.on_error("format specifier requires numeric argument");
+ }
+
+ FMT_CONSTEXPR void check_sign() {
+ require_numeric_argument();
+ if (is_integral_type(arg_type_) && arg_type_ != type::int_type &&
+ arg_type_ != type::long_long_type && arg_type_ != type::char_type) {
+ error_handler_.on_error("format specifier requires signed argument");
+ }
+ }
+
+ FMT_CONSTEXPR void check_precision() {
+ if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type)
+ error_handler_.on_error("precision not allowed for this argument type");
+ }
+
+ private:
+ ErrorHandler& error_handler_;
+ detail::type arg_type_;
+};
+
+// A format specifier handler that checks if specifiers are consistent with the
+// argument type.
+template <typename Handler> class specs_checker : public Handler {
+ private:
+ numeric_specs_checker<Handler> checker_;
+
+ // Suppress an MSVC warning about using this in initializer list.
+ FMT_CONSTEXPR Handler& error_handler() { return *this; }
+
+ public:
+ FMT_CONSTEXPR specs_checker(const Handler& handler, detail::type arg_type)
+ : Handler(handler), checker_(error_handler(), arg_type) {}
+
+ FMT_CONSTEXPR specs_checker(const specs_checker& other)
+ : Handler(other), checker_(error_handler(), other.arg_type_) {}
+
+ FMT_CONSTEXPR void on_align(align_t align) {
+ if (align == align::numeric) checker_.require_numeric_argument();
+ Handler::on_align(align);
+ }
+
+ FMT_CONSTEXPR void on_plus() {
+ checker_.check_sign();
+ Handler::on_plus();
+ }
+
+ FMT_CONSTEXPR void on_minus() {
+ checker_.check_sign();
+ Handler::on_minus();
+ }
+
+ FMT_CONSTEXPR void on_space() {
+ checker_.check_sign();
+ Handler::on_space();
+ }
+
+ FMT_CONSTEXPR void on_hash() {
+ checker_.require_numeric_argument();
+ Handler::on_hash();
+ }
+
+ FMT_CONSTEXPR void on_zero() {
+ checker_.require_numeric_argument();
+ Handler::on_zero();
+ }
+
+ FMT_CONSTEXPR void end_precision() { checker_.check_precision(); }
+};
+
+template <template <typename> class Handler, typename FormatArg,
+ typename ErrorHandler>
+FMT_CONSTEXPR int get_dynamic_spec(FormatArg arg, ErrorHandler eh) {
+ unsigned long long value = visit_format_arg(Handler<ErrorHandler>(eh), arg);
+ if (value > to_unsigned(max_value<int>())) eh.on_error("number is too big");
+ return static_cast<int>(value);
+}
+
+struct auto_id {};
+
+template <typename Context, typename ID>
+FMT_CONSTEXPR typename Context::format_arg get_arg(Context& ctx, ID id) {
+ auto arg = ctx.arg(id);
+ if (!arg) ctx.on_error("argument not found");
+ return arg;
+}
+
+// The standard format specifier handler with checking.
+template <typename ParseContext, typename Context>
+class specs_handler : public specs_setter<typename Context::char_type> {
+ public:
+ using char_type = typename Context::char_type;
+
+ FMT_CONSTEXPR specs_handler(basic_format_specs<char_type>& specs,
+ ParseContext& parse_ctx, Context& ctx)
+ : specs_setter<char_type>(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); }
+
+ private:
+ // This is only needed for compatibility with gcc 4.4.
+ using format_arg = typename Context::format_arg;
+
+ FMT_CONSTEXPR format_arg get_arg(auto_id) {
+ return detail::get_arg(context_, parse_context_.next_arg_id());
+ }
+
+ FMT_CONSTEXPR format_arg get_arg(int arg_id) {
+ parse_context_.check_arg_id(arg_id);
+ return detail::get_arg(context_, arg_id);
+ }
+
+ FMT_CONSTEXPR format_arg get_arg(basic_string_view<char_type> arg_id) {
+ parse_context_.check_arg_id(arg_id);
+ return detail::get_arg(context_, arg_id);
+ }
+
+ ParseContext& parse_context_;
+ Context& context_;
+};
+
+enum class arg_id_kind { none, index, name };
+
+// An argument reference.
+template <typename Char> struct arg_ref {
+ FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
+
+ FMT_CONSTEXPR explicit arg_ref(int index)
+ : kind(arg_id_kind::index), val(index) {}
+ FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
+ : kind(arg_id_kind::name), val(name) {}
+
+ FMT_CONSTEXPR arg_ref& operator=(int idx) {
+ kind = arg_id_kind::index;
+ val.index = idx;
+ return *this;
+ }
+
+ arg_id_kind kind;
+ union value {
+ FMT_CONSTEXPR value(int id = 0) : index{id} {}
+ FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
+
+ int index;
+ basic_string_view<Char> name;
+ } val;
+};
+
+// Format specifiers with width and precision resolved at formatting rather
+// than parsing time to allow re-using the same parsed specifiers with
+// different sets of arguments (precompilation of format strings).
+template <typename Char>
+struct dynamic_format_specs : basic_format_specs<Char> {
+ arg_ref<Char> width_ref;
+ arg_ref<Char> precision_ref;
+};
+
+// 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:
+ using arg_ref_type = arg_ref<char_type>;
+
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(int arg_id) {
+ context_.check_arg_id(arg_id);
+ return arg_ref_type(arg_id);
+ }
+
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(auto_id) {
+ return arg_ref_type(context_.next_arg_id());
+ }
+
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<char_type> arg_id) {
+ 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);
+ }
+
+ dynamic_format_specs<char_type>& specs_;
+ ParseContext& context_;
+};
+
+template <typename Char, typename IDHandler>
+FMT_CONSTEXPR const Char* parse_arg_id(const Char* begin, const Char* end,
+ IDHandler&& handler) {
+ FMT_ASSERT(begin != end, "");
+ Char c = *begin;
+ if (c == '}' || c == ':') {
+ handler();
+ return begin;
+ }
+ if (c >= '0' && c <= '9') {
+ int index = 0;
+ if (c != '0')
+ index = parse_nonnegative_int(begin, end, handler);
+ else
+ ++begin;
+ if (begin == end || (*begin != '}' && *begin != ':'))
+ handler.on_error("invalid format string");
+ else
+ handler(index);
+ return begin;
+ }
+ if (!is_name_start(c)) {
+ handler.on_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)));
+ return it;
+}
+
+// Adapts SpecHandler to IDHandler API for dynamic width.
+template <typename SpecHandler, typename Char> struct width_adapter {
+ explicit FMT_CONSTEXPR width_adapter(SpecHandler& h) : handler(h) {}
+
+ 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) {
+ handler.on_error(message);
+ }
+
+ SpecHandler& handler;
+};
+
+// Adapts SpecHandler to IDHandler API for dynamic precision.
+template <typename SpecHandler, typename Char> struct precision_adapter {
+ explicit FMT_CONSTEXPR precision_adapter(SpecHandler& h) : handler(h) {}
+
+ 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) {
+ handler.on_error(message);
+ }
+
+ SpecHandler& handler;
+};
+
+template <typename Char>
+FMT_CONSTEXPR int code_point_length(const Char* begin) {
+ if (const_check(sizeof(Char) != 1)) return 1;
+ constexpr char lengths[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 3, 3, 4, 0};
+ 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;
+}
+
+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.
+template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
+constexpr Char to_ascii(Char value) {
+ return value;
+}
+template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
+constexpr typename std::underlying_type<Char>::type to_ascii(Char value) {
+ return value;
+}
+
+// Parses fill and alignment.
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_align(const Char* begin, const Char* end,
+ Handler&& handler) {
+ 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;
+#if FMT_DEPRECATED_NUMERIC_ALIGN
+ case '=':
+ align = align::numeric;
+ break;
+#endif
+ case '^':
+ align = align::center;
+ 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;
+ }
+ return begin;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_width(const Char* begin, const Char* end,
+ Handler&& handler) {
+ FMT_ASSERT(begin != end, "");
+ if ('0' <= *begin && *begin <= '9') {
+ handler.on_width(parse_nonnegative_int(begin, end, handler));
+ } else if (*begin == '{') {
+ ++begin;
+ if (begin != end)
+ begin = parse_arg_id(begin, end, width_adapter<Handler, Char>(handler));
+ if (begin == end || *begin != '}')
+ return handler.on_error("invalid format string"), begin;
+ ++begin;
+ }
+ return begin;
+}
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_precision(const Char* begin, const Char* end,
+ Handler&& handler) {
+ ++begin;
+ auto c = begin != end ? *begin : Char();
+ if ('0' <= c && c <= '9') {
+ handler.on_precision(parse_nonnegative_int(begin, end, handler));
+ } else if (c == '{') {
+ ++begin;
+ if (begin != end) {
+ begin =
+ parse_arg_id(begin, end, precision_adapter<Handler, Char>(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;
+}
+
+// Parses standard format specifiers and sends notifications about parsed
+// components to handler.
+template <typename Char, typename SpecHandler>
+FMT_CONSTEXPR const Char* parse_format_specs(const Char* begin, const Char* end,
+ SpecHandler&& handler) {
+ if (begin == end) return begin;
+
+ begin = parse_align(begin, end, handler);
+ if (begin == end) return begin;
+
+ // Parse sign.
+ switch (to_ascii(*begin)) {
+ case '+':
+ handler.on_plus();
+ ++begin;
+ break;
+ case '-':
+ handler.on_minus();
+ ++begin;
+ break;
+ case ' ':
+ handler.on_space();
+ ++begin;
+ 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);
+ }
+
+ // Parse type.
+ if (begin != end && *begin != '}') handler.on_type(*begin++);
+ return begin;
+}
+
+// Return the result via the out param to workaround gcc bug 77539.
+template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
+FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr& out) {
+ for (out = first; out != last; ++out) {
+ if (*out == value) return true;
+ }
+ return false;
+}
+
+template <>
+inline bool find<false, char>(const char* first, const char* last, char value,
+ const char*& out) {
+ out = static_cast<const char*>(
+ std::memchr(first, value, detail::to_unsigned(last - first)));
+ return out != nullptr;
+}
+
+template <typename Handler, typename Char> struct id_adapter {
+ 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) {
+ arg_id = handler.on_arg_id(id);
+ }
+ FMT_CONSTEXPR void on_error(const char* message) {
+ handler.on_error(message);
+ }
+};
+
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_replacement_field(const Char* begin,
+ const Char* end,
+ Handler&& handler) {
+ ++begin;
+ if (begin == end) return handler.on_error("invalid format string"), end;
+ if (*begin == '}') {
+ handler.on_replacement_field(handler.on_arg_id(), begin);
+ } else if (*begin == '{') {
+ handler.on_text(begin, begin + 1);
+ } else {
+ auto adapter = id_adapter<Handler, Char>{handler, 0};
+ begin = parse_arg_id(begin, end, adapter);
+ Char c = begin != end ? *begin : Char();
+ if (c == '}') {
+ handler.on_replacement_field(adapter.arg_id, begin);
+ } else if (c == ':') {
+ begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
+ if (begin == end || *begin != '}')
+ return handler.on_error("unknown format specifier"), end;
+ } else {
+ return handler.on_error("missing '}' in format string"), end;
+ }
+ }
+ return begin + 1;
+}
+
+template <bool IS_CONSTEXPR, typename Char, typename Handler>
+FMT_CONSTEXPR_DECL FMT_INLINE void parse_format_string(
+ basic_string_view<Char> format_str, Handler&& handler) {
+ auto begin = format_str.data();
+ auto end = begin + format_str.size();
+ if (end - begin < 32) {
+ // Use a simple loop instead of memchr for small strings.
+ const Char* p = begin;
+ while (p != end) {
+ auto c = *p++;
+ if (c == '{') {
+ handler.on_text(begin, p - 1);
+ begin = p = parse_replacement_field(p - 1, end, handler);
+ } else if (c == '}') {
+ if (p == end || *p != '}')
+ return handler.on_error("unmatched '}' in format string");
+ handler.on_text(begin, p);
+ begin = ++p;
+ }
+ }
+ handler.on_text(begin, end);
+ return;
+ }
+ struct writer {
+ FMT_CONSTEXPR void operator()(const Char* pbegin, const Char* pend) {
+ if (pbegin == pend) return;
+ for (;;) {
+ const Char* p = nullptr;
+ if (!find<IS_CONSTEXPR>(pbegin, pend, '}', p))
+ return handler_.on_text(pbegin, pend);
+ ++p;
+ if (p == pend || *p != '}')
+ return handler_.on_error("unmatched '}' in format string");
+ handler_.on_text(pbegin, p);
+ pbegin = p + 1;
+ }
+ }
+ Handler& 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.
+ const Char* p = begin;
+ if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, '{', p))
+ return write(begin, end);
+ write(begin, p);
+ begin = parse_replacement_field(p, end, handler);
+ }
+}
+
+template <typename T, typename ParseContext>
+FMT_CONSTEXPR const typename ParseContext::char_type* parse_format_specs(
+ ParseContext& ctx) {
+ using char_type = typename ParseContext::char_type;
+ using context = buffer_context<char_type>;
+ using mapped_type =
+ conditional_t<detail::mapped_type_constant<T, context>::value !=
+ type::custom_type,
+ decltype(arg_mapper<context>().map(std::declval<T>())), T>;
+ auto f = conditional_t<has_formatter<mapped_type, context>::value,
+ formatter<mapped_type, char_type>,
+ detail::fallback_formatter<T, char_type>>();
+ return f.parse(ctx);
+}
+
+template <typename OutputIt, typename Char, typename Context>
+struct format_handler : detail::error_handler {
+ basic_format_parse_context<Char> parse_context;
+ Context context;
+
+ format_handler(OutputIt out, basic_string_view<Char> str,
+ basic_format_args<Context> format_args, detail::locale_ref loc)
+ : parse_context(str), context(out, format_args, loc) {}
+
+ void on_text(const Char* begin, const Char* end) {
+ auto size = to_unsigned(end - begin);
+ auto out = context.out();
+ auto&& it = reserve(out, size);
+ it = std::copy_n(begin, size, it);
+ context.advance_to(out);
+ }
+
+ int on_arg_id() { return parse_context.next_arg_id(); }
+ int on_arg_id(int id) { return parse_context.check_arg_id(id), id; }
+ int on_arg_id(basic_string_view<Char> id) {
+ int arg_id = context.arg_id(id);
+ if (arg_id < 0) on_error("argument not found");
+ return arg_id;
+ }
+
+ FMT_INLINE void on_replacement_field(int id, const Char*) {
+ auto arg = get_arg(context, id);
+ context.advance_to(visit_format_arg(
+ default_arg_formatter<OutputIt, Char>{context.out(), context.args(),
+ context.locale()},
+ arg));
+ }
+
+ const Char* on_format_specs(int id, const Char* begin, const Char* end) {
+ auto arg = get_arg(context, id);
+ if (arg.type() == type::custom_type) {
+ advance_to(parse_context, begin);
+ visit_format_arg(custom_formatter<Context>(parse_context, context), arg);
+ return parse_context.begin();
+ }
+ auto specs = basic_format_specs<Char>();
+ if (begin + 1 < end && begin[1] == '}' && is_ascii_letter(*begin)) {
+ specs.type = static_cast<char>(*begin++);
+ } else {
+ using parse_context_t = basic_format_parse_context<Char>;
+ specs_checker<specs_handler<parse_context_t, Context>> handler(
+ specs_handler<parse_context_t, Context>(specs, parse_context,
+ context),
+ arg.type());
+ begin = parse_format_specs(begin, end, handler);
+ if (begin == end || *begin != '}')
+ on_error("missing '}' in format string");
+ }
+ context.advance_to(visit_format_arg(
+ arg_formatter<OutputIt, Char>(context, &parse_context, &specs), arg));
+ return begin;
+ }
+};
+
+// 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 = max_value<int>(),
+ ErrorHandler eh = {})
+ : base(format_str, eh), num_args_(num_args) {}
+
+ FMT_CONSTEXPR int next_arg_id() {
+ 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 Char, typename ErrorHandler, typename... Args>
+class format_string_checker {
+ 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>...} {}
+
+ FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
+
+ FMT_CONSTEXPR int on_arg_id() { return context_.next_arg_id(); }
+ FMT_CONSTEXPR int on_arg_id(int id) { return context_.check_arg_id(id), id; }
+ FMT_CONSTEXPR int on_arg_id(basic_string_view<Char>) {
+ on_error("compile-time checks don't support named arguments");
+ return 0;
+ }
+
+ FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
+
+ FMT_CONSTEXPR const Char* on_format_specs(int id, const Char* begin,
+ const Char*) {
+ advance_to(context_, begin);
+ return id < num_args ? parse_funcs_[id](context_) : begin;
+ }
+
+ FMT_CONSTEXPR void on_error(const char* message) {
+ context_.on_error(message);
+ }
+
+ private:
+ using parse_context_type = compile_parse_context<Char, ErrorHandler>;
+ enum { num_args = sizeof...(Args) };
+
+ // Format specifier parsing function.
+ using parse_func = const Char* (*)(parse_context_type&);
+
+ parse_context_type context_;
+ parse_func parse_funcs_[num_args > 0 ? num_args : 1];
+};
+
+// Converts string literals to basic_string_view.
+template <typename Char, size_t N>
+FMT_CONSTEXPR basic_string_view<Char> compile_string_to_view(
+ const Char (&s)[N]) {
+ // Remove trailing null character if needed. Won't be present if this is used
+ // with raw character array (i.e. not defined as a string).
+ return {s,
+ N - ((std::char_traits<Char>::to_int_type(s[N - 1]) == 0) ? 1 : 0)};
+}
+
+// Converts string_view to basic_string_view.
+template <typename Char>
+FMT_CONSTEXPR basic_string_view<Char> compile_string_to_view(
+ const std_string_view<Char>& s) {
+ return {s.data(), s.size()};
+}
+
+#define FMT_STRING_IMPL(s, base) \
+ [] { \
+ /* Use a macro-like name to avoid shadowing warnings. */ \
+ struct FMT_COMPILE_STRING : base { \
+ using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
+ FMT_MAYBE_UNUSED FMT_CONSTEXPR \
+ operator fmt::basic_string_view<char_type>() const { \
+ return fmt::detail::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)
+
+template <typename... Args, typename S,
+ enable_if_t<(is_compile_string<S>::value), int>>
+void check_format_string(S format_str) {
+ FMT_CONSTEXPR_DECL auto s = to_string_view(format_str);
+ using checker = format_string_checker<typename S::char_type, error_handler,
+ remove_cvref_t<Args>...>;
+ FMT_CONSTEXPR_DECL bool invalid_format =
+ (parse_format_string<true>(s, checker(s, {})), true);
+ (void)invalid_format;
+}
+
+template <template <typename> class Handler, typename Context>
+void handle_dynamic_spec(int& value, arg_ref<typename Context::char_type> ref,
+ Context& ctx) {
+ switch (ref.kind) {
+ case arg_id_kind::none:
+ break;
+ case arg_id_kind::index:
+ value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.index),
+ ctx.error_handler());
+ break;
+ case arg_id_kind::name:
+ value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.name),
+ ctx.error_handler());
+ break;
+ }
+}
+
+using format_func = void (*)(detail::buffer<char>&, int, string_view);
+
+FMT_API void format_error_code(buffer<char>& out, int error_code,
+ string_view message) FMT_NOEXCEPT;
+
+FMT_API void report_error(format_func func, int error_code,
+ string_view message) FMT_NOEXCEPT;
+} // namespace detail
+
+template <typename OutputIt, typename Char>
+using arg_formatter FMT_DEPRECATED_ALIAS =
+ detail::arg_formatter<OutputIt, Char>;
+
+/**
+ An error returned by an operating system or a language runtime,
+ for example a file opening error.
+*/
+FMT_CLASS_API
+class FMT_API system_error : public std::runtime_error {
+ private:
+ void init(int err_code, string_view format_str, format_args args);
+
+ protected:
+ int error_code_;
+
+ system_error() : std::runtime_error(""), error_code_(0) {}
+
+ public:
+ /**
+ \rst
+ Constructs a :class:`fmt::system_error` object with a description
+ formatted with `fmt::format_system_error`. *message* and additional
+ arguments passed into the constructor are formatted similarly to
+ `fmt::format`.
+
+ **Example**::
+
+ // This throws a system_error with the description
+ // cannot open file 'madeup': No such file or directory
+ // or similar (system message may vary).
+ const char *filename = "madeup";
+ std::FILE *file = std::fopen(filename, "r");
+ if (!file)
+ throw fmt::system_error(errno, "cannot open file '{}'", filename);
+ \endrst
+ */
+ template <typename... Args>
+ system_error(int error_code, string_view message, const Args&... args)
+ : std::runtime_error("") {
+ init(error_code, message, make_format_args(args...));
+ }
+ system_error(const system_error&) = default;
+ system_error& operator=(const system_error&) = default;
+ system_error(system_error&&) = default;
+ system_error& operator=(system_error&&) = default;
+ ~system_error() FMT_NOEXCEPT FMT_OVERRIDE;
+
+ int error_code() const { return error_code_; }
+};
+
+/**
+ \rst
+ Formats an error returned by an operating system or a language runtime,
+ for example a file opening error, and writes it to *out* in the following
+ form:
+
+ .. parsed-literal::
+ *<message>*: *<system-message>*
+
+ where *<message>* is the passed message and *<system-message>* is
+ the system message corresponding to the error code.
+ *error_code* is a system error code as given by ``errno``.
+ If *error_code* is not a valid error code such as -1, the system message
+ may look like "Unknown error -1" and is platform-dependent.
+ \endrst
+ */
+FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
+ string_view message) FMT_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,
+ string_view message) FMT_NOEXCEPT;
+
+/** Fast integer formatter. */
+class format_int {
+ private:
+ // Buffer should be large enough to hold all digits (digits10 + 1),
+ // a sign and a null character.
+ enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
+ mutable char buffer_[buffer_size];
+ char* str_;
+
+ template <typename UInt> char* format_unsigned(UInt value) {
+ auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
+ return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
+ }
+
+ template <typename Int> char* format_signed(Int value) {
+ auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
+ bool negative = value < 0;
+ if (negative) abs_value = 0 - abs_value;
+ auto begin = format_unsigned(abs_value);
+ if (negative) *--begin = '-';
+ return begin;
+ }
+
+ public:
+ explicit format_int(int value) : str_(format_signed(value)) {}
+ explicit format_int(long value) : str_(format_signed(value)) {}
+ explicit format_int(long long value) : str_(format_signed(value)) {}
+ explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
+ explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
+ explicit format_int(unsigned long long value)
+ : str_(format_unsigned(value)) {}
+
+ /** Returns the number of characters written to the output buffer. */
+ size_t size() const {
+ return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
+ }
+
+ /**
+ Returns a pointer to the output buffer content. No terminating null
+ character is appended.
+ */
+ const char* data() const { return str_; }
+
+ /**
+ Returns a pointer to the output buffer content with terminating null
+ character appended.
+ */
+ const char* c_str() const {
+ buffer_[buffer_size - 1] = '\0';
+ return str_;
+ }
+
+ /**
+ \rst
+ Returns the content of the output buffer as an ``std::string``.
+ \endrst
+ */
+ std::string str() const { return std::string(str_, size()); }
+};
+
+// A formatter specialization for the core types corresponding to detail::type
+// constants.
+template <typename T, typename Char>
+struct formatter<T, Char,
+ enable_if_t<detail::type_constant<T, Char>::value !=
+ detail::type::custom_type>> {
+ FMT_CONSTEXPR formatter() = default;
+
+ // 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()) {
+ using handler_type = detail::dynamic_specs_handler<ParseContext>;
+ auto type = detail::type_constant<T, Char>::value;
+ detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
+ type);
+ auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
+ auto eh = ctx.error_handler();
+ switch (type) {
+ case detail::type::none_type:
+ FMT_ASSERT(false, "invalid argument type");
+ break;
+ 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:
+ case detail::type::bool_type:
+ handle_int_type_spec(specs_.type,
+ detail::int_type_checker<decltype(eh)>(eh));
+ break;
+ case detail::type::char_type:
+ handle_char_specs(
+ &specs_, detail::char_specs_checker<decltype(eh)>(specs_.type, 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::handle_cstring_type_spec(
+ specs_.type, detail::cstring_type_checker<decltype(eh)>(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 should be checked in parse functions of
+ // formatter specializations.
+ break;
+ }
+ return it;
+ }
+
+ template <typename FormatContext>
+ auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
+ 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);
+ using af = detail::arg_formatter<typename FormatContext::iterator,
+ typename FormatContext::char_type>;
+ return visit_format_arg(af(ctx, nullptr, &specs_),
+ detail::make_arg<FormatContext>(val));
+ }
+
+ private:
+ detail::dynamic_format_specs<Char> specs_;
+};
+
+#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) -> decltype(ctx.out()) { \
+ return formatter<Base, Char>::format(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>
+struct formatter<void*, Char> : formatter<const void*, Char> {
+ template <typename FormatContext>
+ auto format(void* val, FormatContext& ctx) -> decltype(ctx.out()) {
+ return formatter<const void*, Char>::format(val, ctx);
+ }
+};
+
+template <typename Char, size_t N>
+struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
+ template <typename FormatContext>
+ auto format(const Char* val, FormatContext& ctx) -> decltype(ctx.out()) {
+ return formatter<basic_string_view<Char>, Char>::format(val, ctx);
+ }
+};
+
+// 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:
+ struct null_handler : detail::error_handler {
+ void on_align(align_t) {}
+ void on_plus() {}
+ void on_minus() {}
+ void on_space() {}
+ void on_hash() {}
+ };
+
+ public:
+ template <typename ParseContext>
+ 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 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);
+ switch (specs_.sign) {
+ case sign::none:
+ break;
+ case sign::plus:
+ checker.on_plus();
+ break;
+ case sign::minus:
+ checker.on_minus();
+ break;
+ case sign::space:
+ checker.on_space();
+ break;
+ }
+ if (specs_.alt) checker.on_hash();
+ if (specs_.precision >= 0) checker.end_precision();
+ using af = detail::arg_formatter<typename FormatContext::iterator,
+ typename FormatContext::char_type>;
+ visit_format_arg(af(ctx, nullptr, &specs_),
+ detail::make_arg<FormatContext>(val));
+ return ctx.out();
+ }
+
+ private:
+ 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);
+ }
+
+ detail::dynamic_format_specs<Char> specs_;
+ const Char* format_str_;
+};
+
+template <typename Char, typename ErrorHandler>
+FMT_CONSTEXPR void advance_to(
+ basic_format_parse_context<Char, ErrorHandler>& ctx, const Char* p) {
+ ctx.advance_to(ctx.begin() + (p - &*ctx.begin()));
+}
+
+/**
+ \rst
+ Converts ``p`` to ``const void*`` for pointer formatting.
+
+ **Example**::
+
+ auto s = fmt::format("{}", fmt::ptr(p));
+ \endrst
+ */
+template <typename T> inline const void* ptr(const T* p) { return p; }
+template <typename T> inline const void* ptr(const std::unique_ptr<T>& p) {
+ return p.get();
+}
+template <typename T> inline const void* ptr(const std::shared_ptr<T>& p) {
+ return p.get();
+}
+
+class bytes {
+ private:
+ string_view data_;
+ friend struct formatter<bytes>;
+
+ public:
+ explicit bytes(string_view data) : data_(data) {}
+};
+
+template <> struct formatter<bytes> {
+ private:
+ detail::dynamic_format_specs<char> 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;
+ }
+
+ template <typename FormatContext>
+ auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
+ 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_bytes(ctx.out(), b.data_, specs_);
+ }
+};
+
+template <typename It, typename Sentinel, typename Char>
+struct arg_join : detail::view {
+ It begin;
+ Sentinel end;
+ basic_string_view<Char> sep;
+
+ arg_join(It b, Sentinel e, basic_string_view<Char> s)
+ : begin(b), end(e), sep(s) {}
+};
+
+template <typename It, typename Sentinel, typename Char>
+struct formatter<arg_join<It, Sentinel, Char>, Char>
+ : formatter<typename std::iterator_traits<It>::value_type, Char> {
+ template <typename FormatContext>
+ auto format(const arg_join<It, Sentinel, Char>& value, FormatContext& ctx)
+ -> decltype(ctx.out()) {
+ using base = formatter<typename std::iterator_traits<It>::value_type, Char>;
+ auto it = value.begin;
+ auto out = ctx.out();
+ if (it != value.end) {
+ out = base::format(*it++, ctx);
+ while (it != value.end) {
+ out = std::copy(value.sep.begin(), value.sep.end(), out);
+ ctx.advance_to(out);
+ out = base::format(*it++, ctx);
+ }
+ }
+ return out;
+ }
+};
+
+/**
+ Returns an object that formats the iterator range `[begin, end)` with elements
+ separated by `sep`.
+ */
+template <typename It, typename Sentinel>
+arg_join<It, Sentinel, char> join(It begin, Sentinel end, string_view sep) {
+ return {begin, end, sep};
+}
+
+template <typename It, typename Sentinel>
+arg_join<It, Sentinel, wchar_t> join(It begin, Sentinel end, wstring_view sep) {
+ return {begin, end, sep};
+}
+
+/**
+ \rst
+ Returns an object that formats `range` with elements separated by `sep`.
+
+ **Example**::
+
+ std::vector<int> v = {1, 2, 3};
+ fmt::print("{}", fmt::join(v, ", "));
+ // Output: "1, 2, 3"
+
+ ``fmt::join`` applies passed format specifiers to the range elements::
+
+ fmt::print("{:02}", fmt::join(v, ", "));
+ // Output: "01, 02, 03"
+ \endrst
+ */
+template <typename Range>
+arg_join<detail::iterator_t<Range>, detail::sentinel_t<Range>, char> join(
+ Range&& range, string_view sep) {
+ return join(std::begin(range), std::end(range), sep);
+}
+
+template <typename Range>
+arg_join<detail::iterator_t<Range>, detail::sentinel_t<Range>, wchar_t> join(
+ Range&& range, wstring_view sep) {
+ return join(std::begin(range), std::end(range), sep);
+}
+
+/**
+ \rst
+ Converts *value* to ``std::string`` using the default format for type *T*.
+
+ **Example**::
+
+ #include <fmt/format.h>
+
+ std::string answer = fmt::to_string(42);
+ \endrst
+ */
+template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+inline std::string to_string(const T& value) {
+ std::string result;
+ detail::write<char>(std::back_inserter(result), value);
+ return result;
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline std::string to_string(T value) {
+ // The buffer should be large enough to store the number including the sign or
+ // "false" for bool.
+ constexpr int max_size = detail::digits10<T>() + 2;
+ char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
+ char* begin = buffer;
+ return std::string(begin, detail::write<char>(begin, value));
+}
+
+/**
+ Converts *value* to ``std::wstring`` using the default format for type *T*.
+ */
+template <typename T> inline std::wstring to_wstring(const T& value) {
+ return format(L"{}", value);
+}
+
+template <typename Char, size_t SIZE>
+std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE>& buf) {
+ auto size = buf.size();
+ detail::assume(size < std::basic_string<Char>().max_size());
+ return std::basic_string<Char>(buf.data(), size);
+}
+
+template <typename Char>
+void detail::vformat_to(
+ detail::buffer<Char>& buf, basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args,
+ detail::locale_ref loc) {
+ using iterator = typename buffer_context<Char>::iterator;
+ auto out = buffer_appender<Char>(buf);
+ if (format_str.size() == 2 && equal2(format_str.data(), "{}")) {
+ auto arg = args.get(0);
+ if (!arg) error_handler().on_error("argument not found");
+ visit_format_arg(default_arg_formatter<iterator, Char>{out, args, loc},
+ arg);
+ return;
+ }
+ format_handler<iterator, Char, buffer_context<Char>> h(out, format_str, args,
+ loc);
+ parse_format_string<false>(format_str, h);
+}
+
+#ifndef FMT_HEADER_ONLY
+extern template void detail::vformat_to(detail::buffer<char>&, string_view,
+ basic_format_args<format_context>,
+ detail::locale_ref);
+namespace detail {
+
+extern template FMT_API std::string grouping_impl<char>(locale_ref loc);
+extern template FMT_API std::string grouping_impl<wchar_t>(locale_ref loc);
+extern template FMT_API char thousands_sep_impl<char>(locale_ref loc);
+extern template FMT_API wchar_t thousands_sep_impl<wchar_t>(locale_ref loc);
+extern template FMT_API char decimal_point_impl(locale_ref loc);
+extern template FMT_API wchar_t decimal_point_impl(locale_ref loc);
+extern template int format_float<double>(double value, int precision,
+ float_specs specs, buffer<char>& buf);
+extern template int format_float<long double>(long double value, int precision,
+ float_specs specs,
+ buffer<char>& buf);
+int snprintf_float(float value, int precision, float_specs specs,
+ buffer<char>& buf) = delete;
+extern template int snprintf_float<double>(double value, int precision,
+ float_specs specs,
+ buffer<char>& buf);
+extern template int snprintf_float<long double>(long double value,
+ int precision,
+ float_specs specs,
+ buffer<char>& buf);
+} // namespace detail
+#endif
+
+template <typename S, typename Char = char_t<S>,
+ FMT_ENABLE_IF(detail::is_string<S>::value)>
+inline void vformat_to(
+ detail::buffer<Char>& buf, const S& format_str,
+ basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args) {
+ return detail::vformat_to(buf, to_string_view(format_str), args);
+}
+
+template <typename S, typename... Args, size_t SIZE = inline_buffer_size,
+ typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
+inline typename buffer_context<Char>::iterator format_to(
+ basic_memory_buffer<Char, SIZE>& buf, const S& format_str, Args&&... args) {
+ const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+ detail::vformat_to(buf, to_string_view(format_str), vargs);
+ return detail::buffer_appender<Char>(buf);
+}
+
+template <typename OutputIt, typename Char = char>
+using format_context_t = basic_format_context<OutputIt, Char>;
+
+template <typename OutputIt, typename Char = char>
+using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>;
+
+template <typename OutputIt, typename Char = typename OutputIt::value_type>
+using format_to_n_context FMT_DEPRECATED_ALIAS = buffer_context<Char>;
+
+template <typename OutputIt, typename Char = typename OutputIt::value_type>
+using format_to_n_args FMT_DEPRECATED_ALIAS =
+ basic_format_args<buffer_context<Char>>;
+
+template <typename OutputIt, typename Char, typename... Args>
+FMT_DEPRECATED format_arg_store<buffer_context<Char>, Args...>
+make_format_to_n_args(const Args&... args) {
+ return format_arg_store<buffer_context<Char>, Args...>(args...);
+}
+
+template <typename Char, enable_if_t<(!std::is_same<Char, char>::value), int>>
+std::basic_string<Char> detail::vformat(
+ basic_string_view<Char> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ basic_memory_buffer<Char> buffer;
+ detail::vformat_to(buffer, format_str, args);
+ return to_string(buffer);
+}
+
+template <typename Char, FMT_ENABLE_IF(std::is_same<Char, wchar_t>::value)>
+void vprint(std::FILE* f, basic_string_view<Char> format_str,
+ wformat_args args) {
+ wmemory_buffer buffer;
+ detail::vformat_to(buffer, format_str, args);
+ buffer.push_back(L'\0');
+ if (std::fputws(buffer.data(), f) == -1)
+ FMT_THROW(system_error(errno, "cannot write to file"));
+}
+
+template <typename Char, FMT_ENABLE_IF(std::is_same<Char, wchar_t>::value)>
+void vprint(basic_string_view<Char> format_str, wformat_args args) {
+ vprint(stdout, format_str, args);
+}
+
+#if FMT_USE_USER_DEFINED_LITERALS
+namespace detail {
+
+# if FMT_USE_UDL_TEMPLATE
+template <typename Char, Char... CHARS> class udl_formatter {
+ public:
+ template <typename... Args>
+ std::basic_string<Char> operator()(Args&&... args) const {
+ static FMT_CONSTEXPR_DECL Char s[] = {CHARS..., '\0'};
+ return format(FMT_STRING(s), std::forward<Args>(args)...);
+ }
+};
+# else
+template <typename Char> struct udl_formatter {
+ basic_string_view<Char> str;
+
+ template <typename... Args>
+ std::basic_string<Char> operator()(Args&&... args) const {
+ return format(str, std::forward<Args>(args)...);
+ }
+};
+# endif // FMT_USE_UDL_TEMPLATE
+
+template <typename Char> struct udl_arg {
+ const Char* str;
+
+ template <typename T> named_arg<Char, T> operator=(T&& value) const {
+ return {str, std::forward<T>(value)};
+ }
+};
+} // namespace detail
+
+inline namespace literals {
+# if FMT_USE_UDL_TEMPLATE
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wpedantic"
+# if FMT_CLANG_VERSION
+# pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template"
+# endif
+template <typename Char, Char... CHARS>
+FMT_CONSTEXPR detail::udl_formatter<Char, CHARS...> operator""_format() {
+ return {};
+}
+# pragma GCC diagnostic pop
+# else
+/**
+ \rst
+ User-defined literal equivalent of :func:`fmt::format`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ std::string message = "The answer is {}"_format(42);
+ \endrst
+ */
+FMT_CONSTEXPR detail::udl_formatter<char> operator"" _format(const char* s,
+ size_t n) {
+ return {{s, n}};
+}
+FMT_CONSTEXPR detail::udl_formatter<wchar_t> operator"" _format(
+ const wchar_t* s, size_t n) {
+ return {{s, n}};
+}
+# endif // FMT_USE_UDL_TEMPLATE
+
+/**
+ \rst
+ User-defined literal equivalent of :func:`fmt::arg`.
+
+ **Example**::
+
+ using namespace fmt::literals;
+ fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
+ \endrst
+ */
+FMT_CONSTEXPR detail::udl_arg<char> operator"" _a(const char* s, size_t) {
+ return {s};
+}
+FMT_CONSTEXPR detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
+ return {s};
+}
+} // namespace literals
+#endif // FMT_USE_USER_DEFINED_LITERALS
+FMT_END_NAMESPACE
+
+#ifdef FMT_HEADER_ONLY
+# define FMT_FUNC inline
+# include "format-inl.h"
+#else
+# define FMT_FUNC
+#endif
+
+#endif // FMT_FORMAT_H_