=== src/third_party/fmt/*.h and src/third_party/format.cpp
-This is a subset of https://fmt.dev[fmt] 8.1.1 with the following license:
+This is a subset of https://fmt.dev[fmt] commit
+8a4bec5cf53387356738a06ba0cf4fdf086241ae (version 10.0.0 plus recent
+development) with the following license:
----
Formatting library for C++
-// Copyright (C) 2020-2022 Joel Rosdahl and other contributors
+// Copyright (C) 2020-2023 Joel Rosdahl and other contributors
//
// See doc/AUTHORS.adoc for a complete list of contributors.
//
#pragma once
-#include "third_party/fmt/core.h"
-#include "third_party/fmt/format.h"
+#include <third_party/fmt/core.h>
+#include <third_party/fmt/format.h>
+#include <third_party/fmt/std.h>
#include <optional>
#include <string>
#include <cstddef> // std::byte
#include <cstdio> // std::FILE
-#include <cstring>
+#include <cstring> // std::strlen
#include <iterator>
#include <limits>
#include <string>
#include <type_traits>
// The fmt library version in the form major * 10000 + minor * 100 + patch.
-#define FMT_VERSION 80101
+#define FMT_VERSION 100001
#if defined(__clang__) && !defined(__ibmxl__)
# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
# define FMT_ICC_VERSION 0
#endif
-#ifdef __NVCC__
-# define FMT_NVCC __NVCC__
-#else
-# define FMT_NVCC 0
-#endif
-
#ifdef _MSC_VER
-# define FMT_MSC_VER _MSC_VER
+# define FMT_MSC_VERSION _MSC_VER
# define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
#else
-# define FMT_MSC_VER 0
+# define FMT_MSC_VERSION 0
# define FMT_MSC_WARNING(...)
#endif
+#ifdef _MSVC_LANG
+# define FMT_CPLUSPLUS _MSVC_LANG
+#else
+# define FMT_CPLUSPLUS __cplusplus
+#endif
+
#ifdef __has_feature
# define FMT_HAS_FEATURE(x) __has_feature(x)
#else
# define FMT_HAS_FEATURE(x) 0
#endif
-#if defined(__has_include) && \
- (!defined(__INTELLISENSE__) || FMT_MSC_VER > 1900) && \
- (!FMT_ICC_VERSION || FMT_ICC_VERSION >= 1600)
+#if defined(__has_include) || FMT_ICC_VERSION >= 1600 || FMT_MSC_VERSION > 1900
# define FMT_HAS_INCLUDE(x) __has_include(x)
#else
# define FMT_HAS_INCLUDE(x) 0
# define FMT_HAS_CPP_ATTRIBUTE(x) 0
#endif
-#ifdef _MSVC_LANG
-# define FMT_CPLUSPLUS _MSVC_LANG
-#else
-# define FMT_CPLUSPLUS __cplusplus
-#endif
-
#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
(FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
// Check if relaxed C++14 constexpr is supported.
// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
#ifndef FMT_USE_CONSTEXPR
-# define FMT_USE_CONSTEXPR \
- (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VER >= 1912 || \
- (FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L)) && \
- !FMT_NVCC && !FMT_ICC_VERSION
+# if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \
+ (FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) && \
+ !FMT_ICC_VERSION && (!defined(__NVCC__) || FMT_CPLUSPLUS >= 202002L)
+# define FMT_USE_CONSTEXPR 1
+# else
+# define FMT_USE_CONSTEXPR 0
+# endif
#endif
#if FMT_USE_CONSTEXPR
# define FMT_CONSTEXPR constexpr
-# define FMT_CONSTEXPR_DECL constexpr
#else
# define FMT_CONSTEXPR
-# define FMT_CONSTEXPR_DECL
#endif
-#if ((__cplusplus >= 202002L) && \
+#if ((FMT_CPLUSPLUS >= 202002L) && \
(!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE > 9)) || \
- (__cplusplus >= 201709L && FMT_GCC_VERSION >= 1002)
+ (FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)
# define FMT_CONSTEXPR20 constexpr
#else
# define FMT_CONSTEXPR20
#endif
-// Check if constexpr std::char_traits<>::compare,length is supported.
+// Check if constexpr std::char_traits<>::{compare,length} are supported.
#if defined(__GLIBCXX__)
-# if __cplusplus >= 201703L && defined(_GLIBCXX_RELEASE) && \
+# if FMT_CPLUSPLUS >= 201703L && defined(_GLIBCXX_RELEASE) && \
_GLIBCXX_RELEASE >= 7 // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
# endif
-#elif defined(_LIBCPP_VERSION) && __cplusplus >= 201703L && \
+#elif defined(_LIBCPP_VERSION) && FMT_CPLUSPLUS >= 201703L && \
_LIBCPP_VERSION >= 4000
# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#elif FMT_MSC_VER >= 1914 && _MSVC_LANG >= 201703L
+#elif FMT_MSC_VERSION >= 1914 && FMT_CPLUSPLUS >= 201703L
# define FMT_CONSTEXPR_CHAR_TRAITS constexpr
#endif
#ifndef FMT_CONSTEXPR_CHAR_TRAITS
// Check if exceptions are disabled.
#ifndef FMT_EXCEPTIONS
# if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
- FMT_MSC_VER && !_HAS_EXCEPTIONS
+ (FMT_MSC_VERSION && !_HAS_EXCEPTIONS)
# define FMT_EXCEPTIONS 0
# else
# define FMT_EXCEPTIONS 1
# endif
#endif
-// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
-#ifndef FMT_USE_NOEXCEPT
-# define FMT_USE_NOEXCEPT 0
-#endif
-
-#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
- FMT_GCC_VERSION >= 408 || FMT_MSC_VER >= 1900
-# define FMT_DETECTED_NOEXCEPT noexcept
-# define FMT_HAS_CXX11_NOEXCEPT 1
-#else
-# define FMT_DETECTED_NOEXCEPT throw()
-# define FMT_HAS_CXX11_NOEXCEPT 0
-#endif
-
-#ifndef FMT_NOEXCEPT
-# if FMT_EXCEPTIONS || FMT_HAS_CXX11_NOEXCEPT
-# define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
-# else
-# define FMT_NOEXCEPT
-# endif
-#endif
-
-// [[noreturn]] is disabled on MSVC and NVCC because of bogus unreachable code
-// warnings.
-#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VER && \
- !FMT_NVCC
+// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
+#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \
+ !defined(__NVCC__)
# define FMT_NORETURN [[noreturn]]
#else
# define FMT_NORETURN
#endif
-#if __cplusplus == 201103L || __cplusplus == 201402L
-# if defined(__INTEL_COMPILER) || defined(__PGI)
-# define FMT_FALLTHROUGH
-# elif defined(__clang__)
-# define FMT_FALLTHROUGH [[clang::fallthrough]]
-# elif FMT_GCC_VERSION >= 700 && \
- (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
-# define FMT_FALLTHROUGH [[gnu::fallthrough]]
-# else
-# define FMT_FALLTHROUGH
-# endif
-#elif FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
-# define FMT_FALLTHROUGH [[fallthrough]]
-#else
-# define FMT_FALLTHROUGH
-#endif
-
#ifndef FMT_NODISCARD
# if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
# define FMT_NODISCARD [[nodiscard]]
# endif
#endif
-#ifndef FMT_USE_FLOAT
-# define FMT_USE_FLOAT 1
-#endif
-#ifndef FMT_USE_DOUBLE
-# define FMT_USE_DOUBLE 1
-#endif
-#ifndef FMT_USE_LONG_DOUBLE
-# define FMT_USE_LONG_DOUBLE 1
-#endif
-
#ifndef FMT_INLINE
# if FMT_GCC_VERSION || FMT_CLANG_VERSION
# define FMT_INLINE inline __attribute__((always_inline))
# endif
#endif
-#ifndef FMT_DEPRECATED
-# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VER >= 1900
-# define FMT_DEPRECATED [[deprecated]]
-# else
-# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
-# define FMT_DEPRECATED __attribute__((deprecated))
-# elif FMT_MSC_VER
-# define FMT_DEPRECATED __declspec(deprecated)
-# else
-# define FMT_DEPRECATED /* deprecated */
-# endif
-# endif
+#ifdef _MSC_VER
+# define FMT_UNCHECKED_ITERATOR(It) \
+ using _Unchecked_type = It // Mark iterator as checked.
+#else
+# define FMT_UNCHECKED_ITERATOR(It) using unchecked_type = It
#endif
#ifndef FMT_BEGIN_NAMESPACE
# define FMT_BEGIN_NAMESPACE \
namespace fmt { \
- inline namespace v8 {
+ inline namespace v10 {
# define FMT_END_NAMESPACE \
} \
}
#endif
-#ifndef FMT_MODULE_EXPORT
-# define FMT_MODULE_EXPORT
-# define FMT_MODULE_EXPORT_BEGIN
-# define FMT_MODULE_EXPORT_END
-# define FMT_BEGIN_DETAIL_NAMESPACE namespace detail {
-# define FMT_END_DETAIL_NAMESPACE }
+#ifndef FMT_EXPORT
+# define FMT_EXPORT
+# define FMT_BEGIN_EXPORT
+# define FMT_END_EXPORT
#endif
#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
-# define FMT_CLASS_API FMT_MSC_WARNING(suppress : 4275)
-# ifdef FMT_EXPORT
+# ifdef FMT_LIB_EXPORT
# define FMT_API __declspec(dllexport)
# elif defined(FMT_SHARED)
# define FMT_API __declspec(dllimport)
# endif
#else
-# define FMT_CLASS_API
-# if defined(FMT_EXPORT) || defined(FMT_SHARED)
+# if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
# if defined(__GNUC__) || defined(__clang__)
# define FMT_API __attribute__((visibility("default")))
# endif
#endif
// libc++ supports string_view in pre-c++17.
-#if (FMT_HAS_INCLUDE(<string_view>) && \
- (__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
- (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
+#if FMT_HAS_INCLUDE(<string_view>) && \
+ (FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
# include <string_view>
# define FMT_USE_STRING_VIEW
-#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
+#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L
# include <experimental/string_view>
# define FMT_USE_EXPERIMENTAL_STRING_VIEW
#endif
#ifndef FMT_UNICODE
-# define FMT_UNICODE !FMT_MSC_VER
+# define FMT_UNICODE !FMT_MSC_VERSION
#endif
#ifndef FMT_CONSTEVAL
-# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
- __cplusplus > 201703L && !defined(__apple_build_version__)) || \
- (defined(__cpp_consteval) && \
- (!FMT_MSC_VER || _MSC_FULL_VER >= 193030704))
-// consteval is broken in MSVC before VS2022 and Apple clang 13.
+# if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
+ (!defined(__apple_build_version__) || \
+ __apple_build_version__ >= 14000029L) && \
+ FMT_CPLUSPLUS >= 202002L) || \
+ (defined(__cpp_consteval) && \
+ (!FMT_MSC_VERSION || _MSC_FULL_VER >= 193030704))
+// consteval is broken in MSVC before VS2022 and Apple clang before 14.
# define FMT_CONSTEVAL consteval
# define FMT_HAS_CONSTEVAL
# else
# endif
#endif
-#ifndef FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-# if defined(__cpp_nontype_template_args) && \
- ((FMT_GCC_VERSION >= 903 && __cplusplus >= 201709L) || \
- __cpp_nontype_template_args >= 201911L)
-# define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 1
+#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS
+# if defined(__cpp_nontype_template_args) && \
+ ((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \
+ __cpp_nontype_template_args >= 201911L) && \
+ !defined(__NVCOMPILER) && !defined(__LCC__)
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
# else
-# define FMT_USE_NONTYPE_TEMPLATE_PARAMETERS 0
+# define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
# endif
#endif
// Enable minimal optimizations for more compact code in debug mode.
FMT_GCC_PRAGMA("GCC push_options")
-#ifndef __OPTIMIZE__
+#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER) && !defined(__LCC__) && \
+ !defined(__CUDACC__)
FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
#endif
FMT_BEGIN_NAMESPACE
-FMT_MODULE_EXPORT_BEGIN
// Implementations of enable_if_t and other metafunctions for older systems.
template <bool B, typename T = void>
using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
template <typename T> struct type_identity { using type = T; };
template <typename T> using type_identity_t = typename type_identity<T>::type;
+template <typename T>
+using underlying_t = typename std::underlying_type<T>::type;
+
+// 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 {};
struct monostate {
constexpr monostate() {}
#ifdef FMT_DOC
# define FMT_ENABLE_IF(...)
#else
-# define FMT_ENABLE_IF(...) enable_if_t<(__VA_ARGS__), int> = 0
+# define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
#endif
-FMT_BEGIN_DETAIL_NAMESPACE
+// This is defined in core.h instead of format.h to avoid injecting in std.
+// It is a template to avoid undesirable implicit conversions to std::byte.
+#ifdef __cpp_lib_byte
+template <typename T, FMT_ENABLE_IF(std::is_same<T, std::byte>::value)>
+inline auto format_as(T b) -> unsigned char {
+ return static_cast<unsigned char>(b);
+}
+#endif
-// Suppress "unused variable" warnings with the method described in
+namespace detail {
+// Suppresses "unused variable" warnings with the method described in
// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
// (void)var does not work on many Intel compilers.
template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
-constexpr FMT_INLINE auto is_constant_evaluated(bool default_value = false)
- FMT_NOEXCEPT -> bool {
-#ifdef __cpp_lib_is_constant_evaluated
+constexpr FMT_INLINE auto is_constant_evaluated(
+ bool default_value = false) noexcept -> bool {
+// Workaround for incompatibility between libstdc++ consteval-based
+// std::is_constant_evaluated() implementation and clang-14.
+// https://github.com/fmtlib/fmt/issues/3247
+#if FMT_CPLUSPLUS >= 202002L && defined(_GLIBCXX_RELEASE) && \
+ _GLIBCXX_RELEASE >= 12 && \
+ (FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
+ ignore_unused(default_value);
+ return __builtin_is_constant_evaluated();
+#elif defined(__cpp_lib_is_constant_evaluated)
ignore_unused(default_value);
return std::is_constant_evaluated();
#else
#endif
}
-// A function to suppress "conditional expression is constant" warnings.
+// Suppresses "conditional expression is constant" warnings.
template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
return value;
}
#ifndef FMT_ASSERT
# ifdef NDEBUG
-// FMT_ASSERT is not empty to avoid -Werror=empty-body.
+// FMT_ASSERT is not empty to avoid -Wempty-body.
# define FMT_ASSERT(condition, message) \
- ::fmt::detail::ignore_unused((condition), (message))
+ fmt::detail::ignore_unused((condition), (message))
# else
# define FMT_ASSERT(condition, message) \
((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
? (void)0 \
- : ::fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
+ : fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
# endif
#endif
-#ifdef __cpp_lib_byte
-using byte = std::byte;
-#else
-enum class byte : unsigned char {};
-#endif
-
#if defined(FMT_USE_STRING_VIEW)
template <typename Char> using std_string_view = std::basic_string_view<Char>;
#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
#ifdef FMT_USE_INT128
// Do nothing.
-#elif defined(__SIZEOF_INT128__) && !FMT_NVCC && \
- !(FMT_CLANG_VERSION && FMT_MSC_VER)
+#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
+ !(FMT_CLANG_VERSION && FMT_MSC_VERSION)
# define FMT_USE_INT128 1
-using int128_t = __int128_t;
-using uint128_t = __uint128_t;
+using int128_opt = __int128_t; // An optional native 128-bit integer.
+using uint128_opt = __uint128_t;
template <typename T> inline auto convert_for_visit(T value) -> T {
return value;
}
# define FMT_USE_INT128 0
#endif
#if !FMT_USE_INT128
-enum class int128_t {};
-enum class uint128_t {};
+enum class int128_opt {};
+enum class uint128_opt {};
// Reduce template instantiations.
-template <typename T> inline auto convert_for_visit(T) -> monostate {
- return {};
-}
+template <typename T> auto convert_for_visit(T) -> monostate { return {}; }
#endif
// Casts a nonnegative integer to unsigned.
template <typename Int>
FMT_CONSTEXPR auto to_unsigned(Int value) ->
typename std::make_unsigned<Int>::type {
- FMT_ASSERT(value >= 0, "negative value");
+ FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
return static_cast<typename std::make_unsigned<Int>::type>(value);
}
-FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char micro[] = "\u00B5";
+FMT_CONSTEXPR inline auto is_utf8() -> bool {
+ FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char section[] = "\u00A7";
-constexpr auto is_utf8() -> bool {
- // Avoid buggy sign extensions in MSVC's constant evaluation mode.
- // https://developercommunity.visualstudio.com/t/C-difference-in-behavior-for-unsigned/1233612
+ // Avoid buggy sign extensions in MSVC's constant evaluation mode (#2297).
using uchar = unsigned char;
- return FMT_UNICODE || (sizeof(micro) == 3 && uchar(micro[0]) == 0xC2 &&
- uchar(micro[1]) == 0xB5);
+ return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 &&
+ uchar(section[1]) == 0xA7);
}
-FMT_END_DETAIL_NAMESPACE
+} // namespace detail
/**
An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
compiled with a different ``-std`` option than the client code (which is not
recommended).
*/
+FMT_EXPORT
template <typename Char> class basic_string_view {
private:
const Char* data_;
using value_type = Char;
using iterator = const Char*;
- constexpr basic_string_view() FMT_NOEXCEPT : data_(nullptr), size_(0) {}
+ constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
/** Constructs a string reference object from a C string and a size. */
- constexpr basic_string_view(const Char* s, size_t count) FMT_NOEXCEPT
- : data_(s),
- size_(count) {}
+ constexpr basic_string_view(const Char* s, size_t count) noexcept
+ : data_(s), size_(count) {}
/**
\rst
/** Constructs a string reference from a ``std::basic_string`` object. */
template <typename Traits, typename Alloc>
FMT_CONSTEXPR basic_string_view(
- const std::basic_string<Char, Traits, Alloc>& s) FMT_NOEXCEPT
- : data_(s.data()),
- size_(s.size()) {}
+ const std::basic_string<Char, Traits, Alloc>& s) noexcept
+ : data_(s.data()), size_(s.size()) {}
template <typename S, FMT_ENABLE_IF(std::is_same<
S, detail::std_string_view<Char>>::value)>
- FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()),
- size_(s.size()) {}
+ FMT_CONSTEXPR basic_string_view(S s) noexcept
+ : data_(s.data()), size_(s.size()) {}
/** Returns a pointer to the string data. */
- constexpr auto data() const FMT_NOEXCEPT -> const Char* { return data_; }
+ constexpr auto data() const noexcept -> const Char* { return data_; }
/** Returns the string size. */
- constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
+ constexpr auto size() const noexcept -> size_t { return size_; }
- constexpr auto begin() const FMT_NOEXCEPT -> iterator { return data_; }
- constexpr auto end() const FMT_NOEXCEPT -> iterator { return data_ + size_; }
+ constexpr auto begin() const noexcept -> iterator { return data_; }
+ constexpr auto end() const noexcept -> iterator { return data_ + size_; }
- constexpr auto operator[](size_t pos) const FMT_NOEXCEPT -> const Char& {
+ constexpr auto operator[](size_t pos) const noexcept -> const Char& {
return data_[pos];
}
- FMT_CONSTEXPR void remove_prefix(size_t n) FMT_NOEXCEPT {
+ FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
data_ += n;
size_ -= n;
}
+ FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(
+ basic_string_view<Char> sv) const noexcept {
+ return size_ >= sv.size_ &&
+ std::char_traits<Char>::compare(data_, sv.data_, sv.size_) == 0;
+ }
+ FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(Char c) const noexcept {
+ return size_ >= 1 && std::char_traits<Char>::eq(*data_, c);
+ }
+ FMT_CONSTEXPR_CHAR_TRAITS bool starts_with(const Char* s) const {
+ return starts_with(basic_string_view<Char>(s));
+ }
+
// Lexicographically compare this string reference to other.
FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
size_t str_size = size_ < other.size_ ? size_ : other.size_;
}
};
+FMT_EXPORT
using string_view = basic_string_view<char>;
/** Specifies if ``T`` is a character type. Can be specialized by users. */
+FMT_EXPORT
template <typename T> struct is_char : std::false_type {};
template <> struct is_char<char> : std::true_type {};
-// Returns a string view of `s`.
+namespace detail {
+
+// A base class for compile-time strings.
+struct compile_string {};
+
+template <typename S>
+struct is_compile_string : std::is_base_of<compile_string, S> {};
+
template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
return s;
return s;
}
template <typename Char,
- FMT_ENABLE_IF(!std::is_empty<detail::std_string_view<Char>>::value)>
-inline auto to_string_view(detail::std_string_view<Char> s)
- -> basic_string_view<Char> {
+ FMT_ENABLE_IF(!std::is_empty<std_string_view<Char>>::value)>
+inline auto to_string_view(std_string_view<Char> s) -> basic_string_view<Char> {
return s;
}
-
-// A base class for compile-time strings. It is defined in the fmt namespace to
-// make formatting functions visible via ADL, e.g. format(FMT_STRING("{}"), 42).
-struct compile_string {};
-
-template <typename S>
-struct is_compile_string : std::is_base_of<compile_string, S> {};
-
template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
constexpr auto to_string_view(const S& s)
-> basic_string_view<typename S::char_type> {
return basic_string_view<typename S::char_type>(s);
}
-
-FMT_BEGIN_DETAIL_NAMESPACE
-
void to_string_view(...);
-using fmt::to_string_view;
// Specifies whether S is a string type convertible to fmt::basic_string_view.
// It should be a constexpr function but MSVC 2017 fails to compile it in
// enable_if and MSVC 2015 fails to compile it as an alias template.
+// ADL is intentionally disabled as to_string_view is not an extension point.
template <typename S>
-struct is_string : std::is_class<decltype(to_string_view(std::declval<S>()))> {
-};
+struct is_string
+ : std::is_class<decltype(detail::to_string_view(std::declval<S>()))> {};
template <typename S, typename = void> struct char_t_impl {};
template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
using type = typename result::value_type;
};
-// Reports a compile-time error if S is not a valid format string.
-template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
-FMT_INLINE void check_format_string(const S&) {
-#ifdef FMT_ENFORCE_COMPILE_STRING
- static_assert(is_compile_string<S>::value,
- "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
- "FMT_STRING.");
-#endif
+enum class type {
+ none_type,
+ // Integer types should go first,
+ int_type,
+ uint_type,
+ long_long_type,
+ ulong_long_type,
+ int128_type,
+ uint128_type,
+ bool_type,
+ char_type,
+ last_integer_type = char_type,
+ // followed by floating-point types.
+ float_type,
+ double_type,
+ long_double_type,
+ last_numeric_type = long_double_type,
+ cstring_type,
+ string_type,
+ pointer_type,
+ custom_type
+};
+
+// Maps core type T to the corresponding type enum constant.
+template <typename T, typename Char>
+struct type_constant : std::integral_constant<type, type::custom_type> {};
+
+#define FMT_TYPE_CONSTANT(Type, constant) \
+ template <typename Char> \
+ struct type_constant<Type, Char> \
+ : std::integral_constant<type, type::constant> {}
+
+FMT_TYPE_CONSTANT(int, int_type);
+FMT_TYPE_CONSTANT(unsigned, uint_type);
+FMT_TYPE_CONSTANT(long long, long_long_type);
+FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
+FMT_TYPE_CONSTANT(int128_opt, int128_type);
+FMT_TYPE_CONSTANT(uint128_opt, uint128_type);
+FMT_TYPE_CONSTANT(bool, bool_type);
+FMT_TYPE_CONSTANT(Char, char_type);
+FMT_TYPE_CONSTANT(float, float_type);
+FMT_TYPE_CONSTANT(double, double_type);
+FMT_TYPE_CONSTANT(long double, long_double_type);
+FMT_TYPE_CONSTANT(const Char*, cstring_type);
+FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
+FMT_TYPE_CONSTANT(const void*, pointer_type);
+
+constexpr bool is_integral_type(type t) {
+ return t > type::none_type && t <= type::last_integer_type;
+}
+constexpr bool is_arithmetic_type(type t) {
+ return t > type::none_type && t <= type::last_numeric_type;
}
-template <typename..., typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
-void check_format_string(S);
+
+constexpr auto set(type rhs) -> int { return 1 << static_cast<int>(rhs); }
+constexpr auto in(type t, int set) -> bool {
+ return ((set >> static_cast<int>(t)) & 1) != 0;
+}
+
+// Bitsets of types.
+enum {
+ sint_set =
+ set(type::int_type) | set(type::long_long_type) | set(type::int128_type),
+ uint_set = set(type::uint_type) | set(type::ulong_long_type) |
+ set(type::uint128_type),
+ bool_set = set(type::bool_type),
+ char_set = set(type::char_type),
+ float_set = set(type::float_type) | set(type::double_type) |
+ set(type::long_double_type),
+ string_set = set(type::string_type),
+ cstring_set = set(type::cstring_type),
+ pointer_set = set(type::pointer_type)
+};
FMT_NORETURN FMT_API void throw_format_error(const char* message);
struct error_handler {
constexpr error_handler() = default;
- constexpr error_handler(const error_handler&) = default;
// This function is intentionally not constexpr to give a compile-time error.
- FMT_NORETURN FMT_API void on_error(const char* message);
+ FMT_NORETURN void on_error(const char* message) {
+ throw_format_error(message);
+ }
};
-FMT_END_DETAIL_NAMESPACE
+} // namespace detail
+
+/** Throws ``format_error`` with a given message. */
+using detail::throw_format_error;
/** String's character type. */
template <typename S> using char_t = typename detail::char_t_impl<S>::type;
You can use the ``format_parse_context`` type alias for ``char`` instead.
\endrst
*/
-template <typename Char, typename ErrorHandler = detail::error_handler>
-class basic_format_parse_context : private ErrorHandler {
+FMT_EXPORT
+template <typename Char> class basic_format_parse_context {
private:
basic_string_view<Char> format_str_;
int next_arg_id_;
+ FMT_CONSTEXPR void do_check_arg_id(int id);
+
public:
using char_type = Char;
- using iterator = typename basic_string_view<Char>::iterator;
+ using iterator = const Char*;
explicit constexpr basic_format_parse_context(
- basic_string_view<Char> format_str, ErrorHandler eh = {},
- int next_arg_id = 0)
- : ErrorHandler(eh), format_str_(format_str), next_arg_id_(next_arg_id) {}
+ basic_string_view<Char> format_str, int next_arg_id = 0)
+ : format_str_(format_str), next_arg_id_(next_arg_id) {}
/**
Returns an iterator to the beginning of the format string range being
parsed.
*/
- constexpr auto begin() const FMT_NOEXCEPT -> iterator {
+ constexpr auto begin() const noexcept -> iterator {
return format_str_.begin();
}
/**
Returns an iterator past the end of the format string range being parsed.
*/
- constexpr auto end() const FMT_NOEXCEPT -> iterator {
- return format_str_.end();
- }
+ constexpr auto end() const noexcept -> iterator { return format_str_.end(); }
/** Advances the begin iterator to ``it``. */
FMT_CONSTEXPR void advance_to(iterator it) {
the next argument index and switches to the automatic indexing.
*/
FMT_CONSTEXPR auto next_arg_id() -> int {
- // Don't check if the argument id is valid to avoid overhead and because it
- // will be checked during formatting anyway.
- if (next_arg_id_ >= 0) return next_arg_id_++;
- on_error("cannot switch from manual to automatic argument indexing");
- return 0;
+ if (next_arg_id_ < 0) {
+ detail::throw_format_error(
+ "cannot switch from manual to automatic argument indexing");
+ return 0;
+ }
+ int id = next_arg_id_++;
+ do_check_arg_id(id);
+ return id;
}
/**
Reports an error if using the automatic argument indexing; otherwise
switches to the manual indexing.
*/
- FMT_CONSTEXPR void check_arg_id(int) {
- if (next_arg_id_ > 0)
- on_error("cannot switch from automatic to manual argument indexing");
- else
- next_arg_id_ = -1;
+ FMT_CONSTEXPR void check_arg_id(int id) {
+ if (next_arg_id_ > 0) {
+ detail::throw_format_error(
+ "cannot switch from automatic to manual argument indexing");
+ return;
+ }
+ next_arg_id_ = -1;
+ do_check_arg_id(id);
}
-
FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
-
- FMT_CONSTEXPR void on_error(const char* message) {
- ErrorHandler::on_error(message);
- }
-
- constexpr auto error_handler() const -> ErrorHandler { return *this; }
+ FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
};
+FMT_EXPORT
using format_parse_context = basic_format_parse_context<char>;
-template <typename Context> class basic_format_arg;
-template <typename Context> class basic_format_args;
-template <typename Context> class dynamic_format_arg_store;
-
-// 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;
-};
+namespace detail {
+// A parse context with extra data used only in compile-time checks.
+template <typename Char>
+class compile_parse_context : public basic_format_parse_context<Char> {
+ private:
+ int num_args_;
+ const type* types_;
+ using base = basic_format_parse_context<Char>;
-// 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>>;
+ public:
+ explicit FMT_CONSTEXPR compile_parse_context(
+ basic_string_view<Char> format_str, int num_args, const type* types,
+ int next_arg_id = 0)
+ : base(format_str, next_arg_id), num_args_(num_args), types_(types) {}
-// 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 {};
+ constexpr auto num_args() const -> int { return num_args_; }
+ constexpr auto arg_type(int id) const -> type { return types_[id]; }
-class appender;
+ FMT_CONSTEXPR auto next_arg_id() -> int {
+ int id = base::next_arg_id();
+ if (id >= num_args_) throw_format_error("argument not found");
+ return id;
+ }
-FMT_BEGIN_DETAIL_NAMESPACE
+ FMT_CONSTEXPR void check_arg_id(int id) {
+ base::check_arg_id(id);
+ if (id >= num_args_) throw_format_error("argument not found");
+ }
+ using base::check_arg_id;
-template <typename Context, typename T>
-constexpr auto has_const_formatter_impl(T*)
- -> decltype(typename Context::template formatter_type<T>().format(
- std::declval<const T&>(), std::declval<Context&>()),
- true) {
- return true;
-}
-template <typename Context>
-constexpr auto has_const_formatter_impl(...) -> bool {
- return false;
-}
-template <typename T, typename Context>
-constexpr auto has_const_formatter() -> bool {
- return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
-}
+ FMT_CONSTEXPR void check_dynamic_spec(int arg_id) {
+ detail::ignore_unused(arg_id);
+#if !defined(__LCC__)
+ if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id]))
+ throw_format_error("width/precision is not integer");
+#endif
+ }
+};
// Extracts a reference to the container from back_insert_iterator.
template <typename Container>
inline auto get_container(std::back_insert_iterator<Container> it)
-> Container& {
- using bi_iterator = std::back_insert_iterator<Container>;
- struct accessor : bi_iterator {
- accessor(bi_iterator iter) : bi_iterator(iter) {}
- using bi_iterator::container;
+ using base = std::back_insert_iterator<Container>;
+ struct accessor : base {
+ accessor(base b) : base(b) {}
+ using base::container;
};
return *accessor(it).container;
}
FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
auto size = to_unsigned(end - begin);
- memcpy(out, begin, size * sizeof(U));
+ if (size > 0) memcpy(out, begin, size * sizeof(U));
return out + size;
}
protected:
// Don't initialize ptr_ since it is not accessed to save a few cycles.
FMT_MSC_WARNING(suppress : 26495)
- buffer(size_t sz) FMT_NOEXCEPT : size_(sz), capacity_(sz) {}
+ buffer(size_t sz) noexcept : size_(sz), capacity_(sz) {}
- FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0,
- size_t cap = 0) FMT_NOEXCEPT : ptr_(p),
- size_(sz),
- capacity_(cap) {}
+ FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) noexcept
+ : ptr_(p), size_(sz), capacity_(cap) {}
FMT_CONSTEXPR20 ~buffer() = default;
buffer(buffer&&) = default;
/** Sets the buffer data and capacity. */
- FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) FMT_NOEXCEPT {
+ FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept {
ptr_ = buf_data;
capacity_ = buf_capacity;
}
buffer(const buffer&) = delete;
void operator=(const buffer&) = delete;
- auto begin() FMT_NOEXCEPT -> T* { return ptr_; }
- auto end() FMT_NOEXCEPT -> T* { return ptr_ + size_; }
+ FMT_INLINE auto begin() noexcept -> T* { return ptr_; }
+ FMT_INLINE auto end() noexcept -> T* { return ptr_ + size_; }
- auto begin() const FMT_NOEXCEPT -> const T* { return ptr_; }
- auto end() const FMT_NOEXCEPT -> const T* { return ptr_ + size_; }
+ FMT_INLINE auto begin() const noexcept -> const T* { return ptr_; }
+ FMT_INLINE auto end() const noexcept -> const T* { return ptr_ + size_; }
/** Returns the size of this buffer. */
- constexpr auto size() const FMT_NOEXCEPT -> size_t { return size_; }
+ constexpr auto size() const noexcept -> size_t { return size_; }
/** Returns the capacity of this buffer. */
- constexpr auto capacity() const FMT_NOEXCEPT -> size_t { return capacity_; }
-
- /** Returns a pointer to the buffer data. */
- FMT_CONSTEXPR auto data() FMT_NOEXCEPT -> T* { return ptr_; }
+ constexpr auto capacity() const noexcept -> size_t { return capacity_; }
- /** Returns a pointer to the buffer data. */
- FMT_CONSTEXPR auto data() const FMT_NOEXCEPT -> const T* { return ptr_; }
+ /** Returns a pointer to the buffer data (not null-terminated). */
+ FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; }
+ FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; }
/** Clears this buffer. */
void clear() { size_ = 0; }
/** Appends data to the end of the buffer. */
template <typename U> void append(const U* begin, const U* end);
- template <typename I> FMT_CONSTEXPR auto operator[](I index) -> T& {
+ template <typename Idx> FMT_CONSTEXPR auto operator[](Idx index) -> T& {
return ptr_[index];
}
- template <typename I>
- FMT_CONSTEXPR auto operator[](I index) const -> const T& {
+ template <typename Idx>
+ FMT_CONSTEXPR auto operator[](Idx index) const -> const T& {
return ptr_[index];
}
};
: buffer<typename Container::value_type>(c.size()), container_(c) {}
explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
: iterator_buffer(get_container(out)) {}
+
auto out() -> std::back_insert_iterator<Container> {
return std::back_inserter(container_);
}
auto count() -> size_t { return count_ + this->size(); }
};
+} // namespace detail
+
+template <typename Char>
+FMT_CONSTEXPR void basic_format_parse_context<Char>::do_check_arg_id(int id) {
+ // Argument id is only checked at compile-time during parsing because
+ // formatting has its own validation.
+ if (detail::is_constant_evaluated() &&
+ (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
+ using context = detail::compile_parse_context<Char>;
+ if (id >= static_cast<context*>(this)->num_args())
+ detail::throw_format_error("argument not found");
+ }
+}
+
+template <typename Char>
+FMT_CONSTEXPR void basic_format_parse_context<Char>::check_dynamic_spec(
+ int arg_id) {
+ if (detail::is_constant_evaluated() &&
+ (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
+ using context = detail::compile_parse_context<Char>;
+ static_cast<context*>(this)->check_dynamic_spec(arg_id);
+ }
+}
+
+FMT_EXPORT template <typename Context> class basic_format_arg;
+FMT_EXPORT template <typename Context> class basic_format_args;
+FMT_EXPORT template <typename Context> class dynamic_format_arg_store;
+
+// A formatter for objects of type T.
+FMT_EXPORT
+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>>;
+
+// An output iterator that appends to a buffer.
+// It is used to reduce symbol sizes for the common case.
+class appender : public std::back_insert_iterator<detail::buffer<char>> {
+ using base = std::back_insert_iterator<detail::buffer<char>>;
+
+ public:
+ using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
+ appender(base it) noexcept : base(it) {}
+ FMT_UNCHECKED_ITERATOR(appender);
+
+ auto operator++() noexcept -> appender& { return *this; }
+ auto operator++(int) noexcept -> appender { return *this; }
+};
+
+namespace detail {
+
+template <typename Context, typename T>
+constexpr auto has_const_formatter_impl(T*)
+ -> decltype(typename Context::template formatter_type<T>().format(
+ std::declval<const T&>(), std::declval<Context&>()),
+ true) {
+ return true;
+}
+template <typename Context>
+constexpr auto has_const_formatter_impl(...) -> bool {
+ return false;
+}
+template <typename T, typename Context>
+constexpr auto has_const_formatter() -> bool {
+ return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
+}
template <typename T>
using buffer_appender = conditional_t<std::is_same<T, char>::value, appender,
auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
return iterator_buffer<OutputIt, T>(out);
}
+template <typename T, typename Buf,
+ FMT_ENABLE_IF(std::is_base_of<buffer<char>, Buf>::value)>
+auto get_buffer(std::back_insert_iterator<Buf> out) -> buffer<char>& {
+ return get_container(out);
+}
-template <typename Buffer>
-auto get_iterator(Buffer& buf) -> decltype(buf.out()) {
+template <typename Buf, typename OutputIt>
+FMT_INLINE auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) {
return buf.out();
}
-template <typename T> auto get_iterator(buffer<T>& buf) -> buffer_appender<T> {
- return buffer_appender<T>(buf);
+template <typename T, typename OutputIt>
+auto get_iterator(buffer<T>&, OutputIt out) -> OutputIt {
+ return out;
}
-template <typename T, typename Char = char, typename Enable = void>
-struct fallback_formatter {
- fallback_formatter() = delete;
-};
-
-// Specifies if T has an enabled fallback_formatter specialization.
-template <typename T, typename Char>
-using has_fallback_formatter =
- std::is_constructible<fallback_formatter<T, Char>>;
-
struct view {};
template <typename Char, typename T> struct named_arg : view {
return count<is_statically_named_arg<Args>::value...>();
}
-enum class type {
- none_type,
- // Integer types should go first,
- int_type,
- uint_type,
- long_long_type,
- ulong_long_type,
- int128_type,
- uint128_type,
- bool_type,
- char_type,
- last_integer_type = char_type,
- // followed by floating-point types.
- float_type,
- double_type,
- long_double_type,
- last_numeric_type = long_double_type,
- cstring_type,
- string_type,
- pointer_type,
- custom_type
-};
-
-// Maps core type T to the corresponding type enum constant.
-template <typename T, typename Char>
-struct type_constant : std::integral_constant<type, type::custom_type> {};
-
-#define FMT_TYPE_CONSTANT(Type, constant) \
- template <typename Char> \
- struct type_constant<Type, Char> \
- : std::integral_constant<type, type::constant> {}
-
-FMT_TYPE_CONSTANT(int, int_type);
-FMT_TYPE_CONSTANT(unsigned, uint_type);
-FMT_TYPE_CONSTANT(long long, long_long_type);
-FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
-FMT_TYPE_CONSTANT(int128_t, int128_type);
-FMT_TYPE_CONSTANT(uint128_t, uint128_type);
-FMT_TYPE_CONSTANT(bool, bool_type);
-FMT_TYPE_CONSTANT(Char, char_type);
-FMT_TYPE_CONSTANT(float, float_type);
-FMT_TYPE_CONSTANT(double, double_type);
-FMT_TYPE_CONSTANT(long double, long_double_type);
-FMT_TYPE_CONSTANT(const Char*, cstring_type);
-FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
-FMT_TYPE_CONSTANT(const void*, pointer_type);
-
-constexpr bool is_integral_type(type t) {
- return t > type::none_type && t <= type::last_integer_type;
-}
-
-constexpr bool is_arithmetic_type(type t) {
- return t > type::none_type && t <= type::last_numeric_type;
-}
-
struct unformattable {};
struct unformattable_char : unformattable {};
-struct unformattable_const : unformattable {};
struct unformattable_pointer : unformattable {};
template <typename Char> struct string_value {
unsigned uint_value;
long long long_long_value;
unsigned long long ulong_long_value;
- int128_t int128_value;
- uint128_t uint128_value;
+ int128_opt int128_value;
+ uint128_opt uint128_value;
bool bool_value;
char_type char_value;
float float_value;
constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
- FMT_INLINE value(int128_t val) : int128_value(val) {}
- FMT_INLINE value(uint128_t val) : uint128_value(val) {}
+ FMT_INLINE value(int128_opt val) : int128_value(val) {}
+ FMT_INLINE value(uint128_opt val) : uint128_value(val) {}
constexpr FMT_INLINE value(float val) : float_value(val) {}
constexpr FMT_INLINE value(double val) : double_value(val) {}
FMT_INLINE value(long double val) : long_double_value(val) {}
: named_args{args, size} {}
template <typename T> FMT_CONSTEXPR FMT_INLINE value(T& val) {
- using value_type = remove_cvref_t<T>;
+ using value_type = remove_const_t<T>;
custom.value = const_cast<value_type*>(&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<
- value_type,
- conditional_t<has_formatter<value_type, Context>::value,
- typename Context::template formatter_type<value_type>,
- fallback_formatter<value_type, char_type>>>;
+ value_type, typename Context::template formatter_type<value_type>>;
}
value(unformattable);
value(unformattable_char);
- value(unformattable_const);
value(unformattable_pointer);
private:
}
};
-template <typename Context, typename T>
-FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context>;
-
// To minimize the number of types we need to deal with, long is translated
// either to int or to long long depending on its size.
enum { long_short = sizeof(long) == sizeof(int) };
using long_type = conditional_t<long_short, int, long long>;
using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
+template <typename T> struct format_as_result {
+ template <typename U,
+ FMT_ENABLE_IF(std::is_enum<U>::value || std::is_class<U>::value)>
+ static auto map(U*) -> decltype(format_as(std::declval<U>()));
+ static auto map(...) -> void;
+
+ using type = decltype(map(static_cast<T*>(nullptr)));
+};
+template <typename T> using format_as_t = typename format_as_result<T>::type;
+
+template <typename T>
+struct has_format_as
+ : bool_constant<!std::is_same<format_as_t<T>, void>::value> {};
+
// Maps formatting arguments to core types.
// arg_mapper reports errors by returning unformattable instead of using
// static_assert because it's used in the is_formattable trait.
-> unsigned long long {
return val;
}
- FMT_CONSTEXPR FMT_INLINE auto map(int128_t val) -> int128_t { return val; }
- FMT_CONSTEXPR FMT_INLINE auto map(uint128_t val) -> uint128_t { return val; }
+ FMT_CONSTEXPR FMT_INLINE auto map(int128_opt val) -> int128_opt {
+ return val;
+ }
+ FMT_CONSTEXPR FMT_INLINE auto map(uint128_opt val) -> uint128_opt {
+ return val;
+ }
FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
return {};
}
- template <typename T,
- FMT_ENABLE_IF(
- std::is_constructible<basic_string_view<char_type>, T>::value &&
- !is_string<T>::value && !has_formatter<T, Context>::value &&
- !has_fallback_formatter<T, char_type>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
- -> basic_string_view<char_type> {
- return basic_string_view<char_type>(val);
- }
- template <
- typename T,
- FMT_ENABLE_IF(
- std::is_constructible<std_string_view<char_type>, T>::value &&
- !std::is_constructible<basic_string_view<char_type>, T>::value &&
- !is_string<T>::value && !has_formatter<T, Context>::value &&
- !has_fallback_formatter<T, char_type>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
- -> basic_string_view<char_type> {
- return std_string_view<char_type>(val);
- }
-
- using cstring_result = conditional_t<std::is_same<char_type, char>::value,
- const char*, unformattable_pointer>;
-
- FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const signed char* val)
- -> cstring_result {
- return map(reinterpret_cast<const char*>(val));
- }
- FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(const unsigned char* val)
- -> cstring_result {
- return map(reinterpret_cast<const char*>(val));
- }
- FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(signed char* val)
- -> cstring_result {
- return map(reinterpret_cast<const char*>(val));
- }
- FMT_DEPRECATED FMT_CONSTEXPR FMT_INLINE auto map(unsigned char* val)
- -> cstring_result {
- return map(reinterpret_cast<const char*>(val));
- }
FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
return val;
}
- // We use SFINAE instead of a const T* parameter to avoid conflicting with
- // the C array overload.
+ // Use SFINAE instead of a const T* parameter to avoid a conflict with the
+ // array overload.
template <
typename T,
FMT_ENABLE_IF(
- std::is_member_pointer<T>::value ||
+ std::is_pointer<T>::value || std::is_member_pointer<T>::value ||
std::is_function<typename std::remove_pointer<T>::type>::value ||
(std::is_convertible<const T&, const void*>::value &&
- !std::is_convertible<const T&, const char_type*>::value))>
+ !std::is_convertible<const T&, const char_type*>::value &&
+ !has_formatter<T, Context>::value))>
FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
return {};
}
return values;
}
- template <typename T,
- FMT_ENABLE_IF(
- std::is_enum<T>::value&& std::is_convertible<T, int>::value &&
- !has_formatter<T, Context>::value &&
- !has_fallback_formatter<T, char_type>::value)>
- FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
- -> decltype(std::declval<arg_mapper>().map(
- static_cast<typename std::underlying_type<T>::type>(val))) {
- return map(static_cast<typename std::underlying_type<T>::type>(val));
- }
-
- FMT_CONSTEXPR FMT_INLINE auto map(detail::byte val) -> unsigned {
- return map(static_cast<unsigned char>(val));
+ // Only map owning types because mapping views can be unsafe.
+ template <typename T, typename U = format_as_t<T>,
+ FMT_ENABLE_IF(std::is_arithmetic<U>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(const T& val) -> decltype(this->map(U())) {
+ return map(format_as(val));
}
- template <typename T, typename U = remove_cvref_t<T>>
- struct formattable
- : bool_constant<has_const_formatter<U, Context>() ||
- !std::is_const<remove_reference_t<T>>::value ||
- has_fallback_formatter<U, char_type>::value> {};
+ template <typename T, typename U = remove_const_t<T>>
+ struct formattable : bool_constant<has_const_formatter<U, Context>() ||
+ (has_formatter<U, Context>::value &&
+ !std::is_const<T>::value)> {};
-#if FMT_MSC_VER != 0 && FMT_MSC_VER < 1910
- // Workaround a bug in MSVC.
- template <typename T> FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
- return val;
- }
-#else
template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
- FMT_CONSTEXPR FMT_INLINE auto do_map(T&& val) -> T& {
+ FMT_CONSTEXPR FMT_INLINE auto do_map(T& val) -> T& {
return val;
}
template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
- FMT_CONSTEXPR FMT_INLINE auto do_map(T&&) -> unformattable_const {
+ FMT_CONSTEXPR FMT_INLINE auto do_map(T&) -> unformattable {
return {};
}
-#endif
- template <typename T, typename U = remove_cvref_t<T>,
- FMT_ENABLE_IF(!is_string<U>::value && !is_char<U>::value &&
- !std::is_array<U>::value &&
- (has_formatter<U, Context>::value ||
- has_fallback_formatter<U, char_type>::value))>
- FMT_CONSTEXPR FMT_INLINE auto map(T&& val)
- -> decltype(this->do_map(std::forward<T>(val))) {
- return do_map(std::forward<T>(val));
+ template <typename T, typename U = remove_const_t<T>,
+ FMT_ENABLE_IF((std::is_class<U>::value || std::is_enum<U>::value ||
+ std::is_union<U>::value) &&
+ !is_string<U>::value && !is_char<U>::value &&
+ !is_named_arg<U>::value &&
+ !std::is_arithmetic<format_as_t<U>>::value)>
+ FMT_CONSTEXPR FMT_INLINE auto map(T& val) -> decltype(this->do_map(val)) {
+ return do_map(val);
}
template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
- -> decltype(std::declval<arg_mapper>().map(named_arg.value)) {
+ -> decltype(this->map(named_arg.value)) {
return map(named_arg.value);
}
enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
-FMT_END_DETAIL_NAMESPACE
+template <typename Char, typename InputIt>
+auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
+ get_container(out).append(begin, end);
+ return out;
+}
+template <typename Char, typename InputIt>
+auto copy_str(InputIt begin, InputIt end,
+ std::back_insert_iterator<std::string> out)
+ -> std::back_insert_iterator<std::string> {
+ get_container(out).append(begin, end);
+ return out;
+}
+
+template <typename Char, typename R, typename OutputIt>
+FMT_CONSTEXPR auto copy_str(R&& rng, OutputIt out) -> OutputIt {
+ return detail::copy_str<Char>(rng.begin(), rng.end(), out);
+}
-// An output iterator that appends to a buffer.
-// It is used to reduce symbol sizes for the common case.
-class appender : public std::back_insert_iterator<detail::buffer<char>> {
- using base = std::back_insert_iterator<detail::buffer<char>>;
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
+// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
+template <typename...> struct void_t_impl { using type = void; };
+template <typename... T> using void_t = typename void_t_impl<T...>::type;
+#else
+template <typename...> using void_t = void;
+#endif
- template <typename T>
- friend auto get_buffer(appender out) -> detail::buffer<char>& {
- return detail::get_container(out);
- }
+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 It> struct is_back_insert_iterator : std::false_type {};
+template <typename Container>
+struct is_back_insert_iterator<std::back_insert_iterator<Container>>
+ : std::true_type {};
+
+// A type-erased reference to an std::locale to avoid a heavy <locale> include.
+class locale_ref {
+ private:
+ const void* locale_; // A type-erased pointer to std::locale.
public:
- using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
- appender(base it) FMT_NOEXCEPT : base(it) {}
- using _Unchecked_type = appender; // Mark iterator as checked.
+ constexpr FMT_INLINE locale_ref() : locale_(nullptr) {}
+ template <typename Locale> explicit locale_ref(const Locale& loc);
- auto operator++() FMT_NOEXCEPT -> appender& { return *this; }
+ explicit operator bool() const noexcept { return locale_ != nullptr; }
- auto operator++(int) FMT_NOEXCEPT -> appender { return *this; }
+ template <typename Locale> auto get() const -> Locale;
};
+template <typename> constexpr auto encode_types() -> unsigned long long {
+ return 0;
+}
+
+template <typename Context, typename Arg, typename... Args>
+constexpr auto encode_types() -> unsigned long long {
+ return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
+ (encode_types<Context, Args...>() << packed_arg_bits);
+}
+
+#if defined(__cpp_if_constexpr)
+// This type is intentionally undefined, only used for errors
+template <typename T, typename Char> struct type_is_unformattable_for;
+#endif
+
+template <bool PACKED, typename Context, typename T, FMT_ENABLE_IF(PACKED)>
+FMT_CONSTEXPR FMT_INLINE auto make_arg(T& val) -> value<Context> {
+ using arg_type = remove_cvref_t<decltype(arg_mapper<Context>().map(val))>;
+
+ constexpr bool formattable_char =
+ !std::is_same<arg_type, unformattable_char>::value;
+ static_assert(formattable_char, "Mixing character types is disallowed.");
+
+ // Formatting of arbitrary pointers is disallowed. If you want to format a
+ // pointer cast it to `void*` or `const void*`. In particular, this forbids
+ // formatting of `[const] volatile char*` printed as bool by iostreams.
+ constexpr bool formattable_pointer =
+ !std::is_same<arg_type, unformattable_pointer>::value;
+ static_assert(formattable_pointer,
+ "Formatting of non-void pointers is disallowed.");
+
+ constexpr bool formattable = !std::is_same<arg_type, unformattable>::value;
+#if defined(__cpp_if_constexpr)
+ if constexpr (!formattable) {
+ type_is_unformattable_for<T, typename Context::char_type> _;
+ }
+#endif
+ static_assert(
+ formattable,
+ "Cannot format an argument. To make type T formattable provide a "
+ "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
+ return {arg_mapper<Context>().map(val)};
+}
+
+template <typename Context, typename T>
+FMT_CONSTEXPR auto make_arg(T& val) -> basic_format_arg<Context> {
+ auto arg = basic_format_arg<Context>();
+ arg.type_ = mapped_type_constant<T, Context>::value;
+ arg.value_ = make_arg<true, Context>(val);
+ return arg;
+}
+
+template <bool PACKED, typename Context, typename T, FMT_ENABLE_IF(!PACKED)>
+FMT_CONSTEXPR inline auto make_arg(T& val) -> basic_format_arg<Context> {
+ return make_arg<Context>(val);
+}
+} // namespace detail
+FMT_BEGIN_EXPORT
+
// A formatting argument. It is a trivially copyable/constructible type to
// allow storage in basic_memory_buffer.
template <typename Context> class basic_format_arg {
detail::type type_;
template <typename ContextType, typename T>
- friend FMT_CONSTEXPR auto detail::make_arg(const T& value)
+ friend FMT_CONSTEXPR auto detail::make_arg(T& value)
-> basic_format_arg<ContextType>;
template <typename Visitor, typename Ctx>
constexpr basic_format_arg() : type_(detail::type::none_type) {}
- constexpr explicit operator bool() const FMT_NOEXCEPT {
+ constexpr explicit operator bool() const noexcept {
return type_ != detail::type::none_type;
}
``vis(value)`` will be called with the value of type ``double``.
\endrst
*/
+FMT_EXPORT
template <typename Visitor, typename Context>
FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
return vis(monostate());
}
-FMT_BEGIN_DETAIL_NAMESPACE
-
-template <typename Char, typename InputIt>
-auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
- get_container(out).append(begin, end);
- return out;
-}
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
-// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
-template <typename... Ts> struct void_t_impl { using type = void; };
-template <typename... Ts>
-using void_t = typename detail::void_t_impl<Ts...>::type;
-#else
-template <typename...> using void_t = void;
-#endif
-
-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 <>
-struct is_contiguous_back_insert_iterator<appender> : 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:
- constexpr 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> auto get() const -> Locale;
-};
-
-template <typename> constexpr auto encode_types() -> unsigned long long {
- return 0;
-}
-
-template <typename Context, typename Arg, typename... Args>
-constexpr auto encode_types() -> unsigned long long {
- return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
- (encode_types<Context, Args...>() << packed_arg_bits);
-}
-
-template <typename Context, typename T>
-FMT_CONSTEXPR auto make_arg(const T& value) -> basic_format_arg<Context> {
- basic_format_arg<Context> arg;
- arg.type_ = mapped_type_constant<T, Context>::value;
- arg.value_ = arg_mapper<Context>().map(value);
- return arg;
-}
-
-// The type template parameter is there to avoid an ODR violation when using
-// a fallback formatter in one translation unit and an implicit conversion in
-// another (not recommended).
-template <bool IS_PACKED, typename Context, type, typename T,
- FMT_ENABLE_IF(IS_PACKED)>
-FMT_CONSTEXPR FMT_INLINE auto make_arg(T&& val) -> value<Context> {
- const auto& arg = arg_mapper<Context>().map(std::forward<T>(val));
-
- constexpr bool formattable_char =
- !std::is_same<decltype(arg), const unformattable_char&>::value;
- static_assert(formattable_char, "Mixing character types is disallowed.");
-
- constexpr bool formattable_const =
- !std::is_same<decltype(arg), const unformattable_const&>::value;
- static_assert(formattable_const, "Cannot format a const argument.");
-
- // Formatting of arbitrary pointers is disallowed. If you want to output
- // a pointer cast it to "void *" or "const void *". In particular, this
- // forbids formatting of "[const] volatile char *" which is printed as bool
- // by iostreams.
- constexpr bool formattable_pointer =
- !std::is_same<decltype(arg), const unformattable_pointer&>::value;
- static_assert(formattable_pointer,
- "Formatting of non-void pointers is disallowed.");
-
- constexpr bool formattable =
- !std::is_same<decltype(arg), const unformattable&>::value;
- static_assert(
- formattable,
- "Cannot format an argument. To make type T formattable provide a "
- "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
- return {arg};
-}
-
-template <bool IS_PACKED, typename Context, type, typename T,
- FMT_ENABLE_IF(!IS_PACKED)>
-inline auto make_arg(const T& value) -> basic_format_arg<Context> {
- return make_arg<Context>(value);
-}
-FMT_END_DETAIL_NAMESPACE
-
// 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_;
public:
using iterator = OutputIt;
using format_arg = basic_format_arg<basic_format_context>;
+ using format_args = basic_format_args<basic_format_context>;
using parse_context_type = basic_format_parse_context<Char>;
- template <typename T> using formatter_type = formatter<T, char_type>;
+ template <typename T> using formatter_type = formatter<T, Char>;
+
+ /** The character type for the output. */
+ using char_type = Char;
basic_format_context(basic_format_context&&) = default;
basic_format_context(const basic_format_context&) = delete;
void operator=(const basic_format_context&) = delete;
/**
- Constructs a ``basic_format_context`` object. References to the arguments are
- stored in the object so make sure they have appropriate lifetimes.
+ Constructs a ``basic_format_context`` object. References to the arguments
+ are stored in the object so make sure they have appropriate lifetimes.
*/
- constexpr basic_format_context(
- OutputIt out, basic_format_args<basic_format_context> ctx_args,
- detail::locale_ref loc = detail::locale_ref())
+ constexpr basic_format_context(OutputIt out, format_args ctx_args,
+ detail::locale_ref loc = {})
: out_(out), args_(ctx_args), loc_(loc) {}
constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
- FMT_CONSTEXPR auto arg(basic_string_view<char_type> name) -> format_arg {
+ FMT_CONSTEXPR auto arg(basic_string_view<Char> name) -> format_arg {
return args_.get(name);
}
- FMT_CONSTEXPR auto arg_id(basic_string_view<char_type> name) -> int {
+ FMT_CONSTEXPR auto arg_id(basic_string_view<Char> name) -> int {
return args_.get_id(name);
}
- auto args() const -> const basic_format_args<basic_format_context>& {
- return args_;
- }
+ auto args() const -> const format_args& { return args_; }
FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
void on_error(const char* message) { error_handler().on_error(message); }
basic_format_context<detail::buffer_appender<Char>, Char>;
using format_context = buffer_context<char>;
-// Workaround an alias issue: https://stackoverflow.com/q/62767544/471164.
-#define FMT_BUFFER_CONTEXT(Char) \
- basic_format_context<detail::buffer_appender<Char>, Char>
-
template <typename T, typename Char = char>
-using is_formattable = bool_constant<
- !std::is_base_of<detail::unformattable,
- decltype(detail::arg_mapper<buffer_context<Char>>().map(
- std::declval<T>()))>::value &&
- !detail::has_fallback_formatter<T, Char>::value>;
+using is_formattable = bool_constant<!std::is_base_of<
+ detail::unformattable, decltype(detail::arg_mapper<buffer_context<Char>>()
+ .map(std::declval<T&>()))>::value>;
/**
\rst
{
private:
static const size_t num_args = sizeof...(Args);
- static const size_t num_named_args = detail::count_named_args<Args...>();
+ static const
expr 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>,
public:
template <typename... T>
- FMT_CONSTEXPR FMT_INLINE format_arg_store(T&&... args)
+ FMT_CONSTEXPR FMT_INLINE format_arg_store(T&... 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<remove_cvref_t<T>, Context>::value>(
- std::forward<T>(args))...} {
- detail::init_named_args(data_.named_args(), 0, 0, args...);
+ data_{detail::make_arg<is_packed, Context>(args)...} {
+ if (detail::const_check(num_named_args != 0))
+ 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`.
+ can be omitted in which case it defaults to `~fmt::format_context`.
See `~fmt::arg` for lifetime considerations.
\endrst
*/
-template <typename Context = format_context, typename... Args>
-constexpr auto make_format_args(Args&&... args)
- -> format_arg_store<Context, remove_cvref_t<Args>...> {
- return {std::forward<Args>(args)...};
+// Arguments are taken by lvalue references to avoid some lifetime issues.
+template <typename Context = format_context, typename... T>
+constexpr auto make_format_args(T&... args)
+ -> format_arg_store<Context, remove_cvref_t<T>...> {
+ return {args...};
}
/**
static_assert(!detail::is_named_arg<T>(), "nested named arguments");
return {name, arg};
}
+FMT_END_EXPORT
/**
\rst
``vformat``::
void vlog(string_view format_str, format_args args); // OK
- format_args args = make_format_args(42); // Error: dangling reference
+ format_args args = make_format_args(); // Error: dangling reference
\endrst
*/
template <typename Context> class basic_format_args {
/** An alias to ``basic_format_args<format_context>``. */
// A separate type would result in shorter symbols but break ABI compatibility
// between clang and gcc on ARM (#1919).
-using format_args = basic_format_args<format_context>;
-
-// We cannot use enum classes as bit fields because of a gcc bug
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414.
+FMT_EXPORT using format_args = basic_format_args<format_context>;
+
+// We cannot use enum classes as bit fields because of a gcc bug, so we put them
+// in namespaces instead (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414).
+// Additionally, if an underlying type is specified, older gcc incorrectly warns
+// that the type is too small. Both bugs are fixed in gcc 9.3.
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 903
+# define FMT_ENUM_UNDERLYING_TYPE(type)
+#else
+# define FMT_ENUM_UNDERLYING_TYPE(type) : type
+#endif
namespace align {
-enum type { none, left, right, center, numeric };
+enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, left, right, center,
+ numeric};
}
using align_t = align::type;
namespace sign {
-enum type { none, minus, plus, space };
+enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, minus, plus, space};
}
using sign_t = sign::type;
-FMT_BEGIN_DETAIL_NAMESPACE
+namespace detail {
// Workaround an array initialization issue in gcc 4.8.
template <typename Char> struct fill_t {
public:
FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
auto size = s.size();
- if (size > max_size) return throw_format_error("invalid fill");
+ FMT_ASSERT(size <= max_size, "invalid fill");
for (size_t i = 0; i < size; ++i) data_[i] = s[i];
size_ = static_cast<unsigned char>(size);
}
return data_[index];
}
};
-FMT_END_DETAIL_NAMESPACE
+} // namespace detail
enum class presentation_type : unsigned char {
none,
- // Integer types should go first,
dec, // 'd'
oct, // 'o'
hex_lower, // 'x'
general_upper, // 'G'
chr, // 'c'
string, // 's'
- pointer // 'p'
+ pointer, // 'p'
+ debug // '?'
};
// Format specifiers for built-in and string types.
-template <typename Char> struct basic_format_specs {
+template <typename Char = char> struct format_specs {
int width;
int precision;
presentation_type type;
bool localized : 1;
detail::fill_t<Char> fill;
- constexpr basic_format_specs()
+ constexpr format_specs()
: width(0),
precision(-1),
type(presentation_type::none),
localized(false) {}
};
-using format_specs = basic_format_specs<char>;
-
-FMT_BEGIN_DETAIL_NAMESPACE
+namespace detail {
enum class arg_id_kind { none, index, name };
arg_id_kind kind;
union value {
- FMT_CONSTEXPR value(int id = 0) : index{id} {}
+ FMT_CONSTEXPR value(int idx = 0) : index(idx) {}
FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
int index;
};
// Format specifiers with width and precision resolved at formatting rather
-// than parsing time to allow re-using the same parsed specifiers with
+// than parsing time to allow reusing the same parsed specifiers with
// different sets of arguments (precompilation of format strings).
-template <typename Char>
-struct dynamic_format_specs : basic_format_specs<Char> {
+template <typename Char = char>
+struct dynamic_format_specs : format_specs<Char> {
arg_ref<Char> width_ref;
arg_ref<Char> precision_ref;
};
-struct auto_id {};
-
-// A format specifier handler that sets fields in basic_format_specs.
-template <typename Char> class specs_setter {
- protected:
- basic_format_specs<Char>& specs_;
-
- public:
- explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char>& specs)
- : specs_(specs) {}
-
- FMT_CONSTEXPR specs_setter(const specs_setter& other)
- : specs_(other.specs_) {}
-
- FMT_CONSTEXPR void on_align(align_t align) { specs_.align = align; }
- FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
- specs_.fill = fill;
- }
- FMT_CONSTEXPR void on_sign(sign_t s) { specs_.sign = s; }
- FMT_CONSTEXPR void on_hash() { specs_.alt = true; }
- FMT_CONSTEXPR void on_localized() { specs_.localized = true; }
-
- FMT_CONSTEXPR void on_zero() {
- if (specs_.align == align::none) specs_.align = align::numeric;
- specs_.fill[0] = Char('0');
- }
-
- FMT_CONSTEXPR void on_width(int width) { specs_.width = width; }
- FMT_CONSTEXPR void on_precision(int precision) {
- specs_.precision = precision;
- }
- FMT_CONSTEXPR void end_precision() {}
-
- FMT_CONSTEXPR void on_type(presentation_type type) { specs_.type = type; }
-};
-
-// Format spec handler that saves references to arguments representing dynamic
-// width and precision to be resolved at formatting time.
-template <typename ParseContext>
-class dynamic_specs_handler
- : public specs_setter<typename ParseContext::char_type> {
- public:
- using char_type = typename ParseContext::char_type;
-
- FMT_CONSTEXPR dynamic_specs_handler(dynamic_format_specs<char_type>& specs,
- ParseContext& ctx)
- : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {}
-
- FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler& other)
- : specs_setter<char_type>(other),
- specs_(other.specs_),
- context_(other.context_) {}
-
- template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
- specs_.width_ref = make_arg_ref(arg_id);
- }
-
- template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
- specs_.precision_ref = make_arg_ref(arg_id);
- }
-
- FMT_CONSTEXPR void on_error(const char* message) {
- context_.on_error(message);
- }
-
- private:
- dynamic_format_specs<char_type>& specs_;
- ParseContext& context_;
-
- using arg_ref_type = arg_ref<char_type>;
-
- FMT_CONSTEXPR auto make_arg_ref(int arg_id) -> arg_ref_type {
- context_.check_arg_id(arg_id);
- return arg_ref_type(arg_id);
- }
-
- FMT_CONSTEXPR auto make_arg_ref(auto_id) -> arg_ref_type {
- return arg_ref_type(context_.next_arg_id());
- }
-
- FMT_CONSTEXPR auto make_arg_ref(basic_string_view<char_type> arg_id)
- -> arg_ref_type {
- context_.check_arg_id(arg_id);
- basic_string_view<char_type> format_str(
- context_.begin(), to_unsigned(context_.end() - context_.begin()));
- return arg_ref_type(arg_id);
- }
-};
-
-template <typename Char> constexpr bool is_ascii_letter(Char c) {
- return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
-}
-
-// Converts a character to ASCII. Returns a number > 127 on conversion failure.
+// Converts a character to ASCII. Returns '\0' on conversion failure.
template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
-constexpr auto to_ascii(Char value) -> Char {
- return value;
+constexpr auto to_ascii(Char c) -> char {
+ return c <= 0xff ? static_cast<char>(c) : '\0';
}
template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
-constexpr auto to_ascii(Char value) ->
- typename std::underlying_type<Char>::type {
- return value;
+constexpr auto to_ascii(Char c) -> char {
+ return c <= 0xff ? static_cast<char>(c) : '\0';
}
+// Returns the number of code units in a code point or 1 on error.
template <typename Char>
FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
if (const_check(sizeof(Char) != 1)) return 1;
- auto lengths =
- "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4";
- int len = lengths[static_cast<unsigned char>(*begin) >> 3];
-
- // Compute the pointer to the next character early so that the next
- // iteration can start working on the next character. Neither Clang
- // nor GCC figure out this reordering on their own.
- return len + !len;
+ auto c = static_cast<unsigned char>(*begin);
+ return static_cast<int>((0x3a55000000000000ull >> (2 * (c >> 3))) & 0x3) + 1;
}
// Return the result via the out param to workaround gcc bug 77539.
: error_value;
}
-// Parses fill and alignment.
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
- Handler&& handler) -> const Char* {
- FMT_ASSERT(begin != end, "");
- auto align = align::none;
- auto p = begin + code_point_length(begin);
- if (p >= end) p = begin;
- for (;;) {
- switch (to_ascii(*p)) {
- case '<':
- align = align::left;
- break;
- case '>':
- align = align::right;
- break;
- case '^':
- align = align::center;
- break;
- default:
- break;
- }
- if (align != align::none) {
- if (p != begin) {
- auto c = *begin;
- if (c == '{')
- return handler.on_error("invalid fill character '{'"), begin;
- handler.on_fill(basic_string_view<Char>(begin, to_unsigned(p - begin)));
- begin = p + 1;
- } else
- ++begin;
- handler.on_align(align);
- break;
- } else if (p == begin) {
- break;
- }
- p = begin;
+FMT_CONSTEXPR inline auto parse_align(char c) -> align_t {
+ switch (c) {
+ case '<':
+ return align::left;
+ case '>':
+ return align::right;
+ case '^':
+ return align::center;
}
- return begin;
+ return align::none;
}
-template <typename Char> FMT_CONSTEXPR bool is_name_start(Char c) {
- return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
+template <typename Char> constexpr auto is_name_start(Char c) -> bool {
+ return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_';
}
-template <typename Char, typename IDHandler>
+template <typename Char, typename Handler>
FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
- IDHandler&& handler) -> const Char* {
- FMT_ASSERT(begin != end, "");
+ Handler&& handler) -> const Char* {
Char c = *begin;
if (c >= '0' && c <= '9') {
int index = 0;
+ constexpr int max = (std::numeric_limits<int>::max)();
if (c != '0')
- index =
- parse_nonnegative_int(begin, end, (std::numeric_limits<int>::max)());
+ index = parse_nonnegative_int(begin, end, max);
else
++begin;
if (begin == end || (*begin != '}' && *begin != ':'))
- handler.on_error("invalid format string");
+ throw_format_error("invalid format string");
else
- handler(index);
+ handler.on_index(index);
return begin;
}
if (!is_name_start(c)) {
- handler.on_error("invalid format string");
+ throw_format_error("invalid format string");
return begin;
}
auto it = begin;
do {
++it;
- } while (it != end && (is_name_start(c = *it) || ('0' <= c && c <= '9')));
- handler(basic_string_view<Char>(begin, to_unsigned(it - begin)));
+ } while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9')));
+ handler.on_name({begin, to_unsigned(it - begin)});
return it;
}
-template <typename Char, typename IDHandler>
+template <typename Char, typename Handler>
FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
- IDHandler&& handler) -> const Char* {
+ Handler&& handler) -> const Char* {
+ FMT_ASSERT(begin != end, "");
Char c = *begin;
if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
- handler();
+ handler.on_auto();
return begin;
}
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_width(const Char* begin, const Char* end,
- Handler&& handler) -> const Char* {
- using detail::auto_id;
- struct width_adapter {
- Handler& handler;
+template <typename Char> struct dynamic_spec_id_handler {
+ basic_format_parse_context<Char>& ctx;
+ arg_ref<Char>& ref;
- FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); }
- FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_width(id); }
- FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
- handler.on_dynamic_width(id);
- }
- FMT_CONSTEXPR void on_error(const char* message) {
- if (message) handler.on_error(message);
- }
- };
+ FMT_CONSTEXPR void on_auto() {
+ int id = ctx.next_arg_id();
+ ref = arg_ref<Char>(id);
+ ctx.check_dynamic_spec(id);
+ }
+ FMT_CONSTEXPR void on_index(int id) {
+ ref = arg_ref<Char>(id);
+ ctx.check_arg_id(id);
+ ctx.check_dynamic_spec(id);
+ }
+ FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
+ ref = arg_ref<Char>(id);
+ ctx.check_arg_id(id);
+ }
+};
+// Parses [integer | "{" [arg_id] "}"].
+template <typename Char>
+FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end,
+ int& value, arg_ref<Char>& ref,
+ basic_format_parse_context<Char>& ctx)
+ -> const Char* {
FMT_ASSERT(begin != end, "");
if ('0' <= *begin && *begin <= '9') {
- int width = parse_nonnegative_int(begin, end, -1);
- if (width != -1)
- handler.on_width(width);
+ int val = parse_nonnegative_int(begin, end, -1);
+ if (val != -1)
+ value = val;
else
- handler.on_error("number is too big");
+ throw_format_error("number is too big");
} else if (*begin == '{') {
++begin;
- if (begin != end) begin = parse_arg_id(begin, end, width_adapter{handler});
- if (begin == end || *begin != '}')
- return handler.on_error("invalid format string"), begin;
- ++begin;
- }
- return begin;
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
- Handler&& handler) -> const Char* {
- using detail::auto_id;
- struct precision_adapter {
- Handler& handler;
-
- FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); }
- FMT_CONSTEXPR void operator()(int id) { handler.on_dynamic_precision(id); }
- FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
- handler.on_dynamic_precision(id);
- }
- FMT_CONSTEXPR void on_error(const char* message) {
- if (message) handler.on_error(message);
- }
- };
-
- ++begin;
- auto c = begin != end ? *begin : Char();
- if ('0' <= c && c <= '9') {
- auto precision = parse_nonnegative_int(begin, end, -1);
- if (precision != -1)
- handler.on_precision(precision);
- else
- handler.on_error("number is too big");
- } else if (c == '{') {
- ++begin;
- if (begin != end)
- begin = parse_arg_id(begin, end, precision_adapter{handler});
- if (begin == end || *begin++ != '}')
- return handler.on_error("invalid format string"), begin;
- } else {
- return handler.on_error("missing precision specifier"), begin;
+ auto handler = dynamic_spec_id_handler<Char>{ctx, ref};
+ if (begin != end) begin = parse_arg_id(begin, end, handler);
+ if (begin != end && *begin == '}') return ++begin;
+ throw_format_error("invalid format string");
}
- handler.end_precision();
return begin;
}
template <typename Char>
-FMT_CONSTEXPR auto parse_presentation_type(Char type) -> presentation_type {
- switch (to_ascii(type)) {
- case 'd':
- return presentation_type::dec;
- case 'o':
- return presentation_type::oct;
- case 'x':
- return presentation_type::hex_lower;
- case 'X':
- return presentation_type::hex_upper;
- case 'b':
- return presentation_type::bin_lower;
- case 'B':
- return presentation_type::bin_upper;
- case 'a':
- return presentation_type::hexfloat_lower;
- case 'A':
- return presentation_type::hexfloat_upper;
- case 'e':
- return presentation_type::exp_lower;
- case 'E':
- return presentation_type::exp_upper;
- case 'f':
- return presentation_type::fixed_lower;
- case 'F':
- return presentation_type::fixed_upper;
- case 'g':
- return presentation_type::general_lower;
- case 'G':
- return presentation_type::general_upper;
- case 'c':
- return presentation_type::chr;
- case 's':
- return presentation_type::string;
- case 'p':
- return presentation_type::pointer;
- default:
- return presentation_type::none;
- }
-}
-
-// Parses standard format specifiers and sends notifications about parsed
-// components to handler.
-template <typename Char, typename SpecHandler>
-FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(const Char* begin,
- const Char* end,
- SpecHandler&& handler)
+FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
+ int& value, arg_ref<Char>& ref,
+ basic_format_parse_context<Char>& ctx)
-> const Char* {
- if (1 < end - begin && begin[1] == '}' && is_ascii_letter(*begin) &&
- *begin != 'L') {
- presentation_type type = parse_presentation_type(*begin++);
- if (type == presentation_type::none)
- handler.on_error("invalid type specifier");
- handler.on_type(type);
+ ++begin;
+ if (begin == end || *begin == '}') {
+ throw_format_error("invalid precision");
return begin;
}
+ return parse_dynamic_spec(begin, end, value, ref, ctx);
+}
- if (begin == end) return begin;
-
- begin = parse_align(begin, end, handler);
- if (begin == end) return begin;
-
- // Parse sign.
- switch (to_ascii(*begin)) {
- case '+':
- handler.on_sign(sign::plus);
- ++begin;
- break;
- case '-':
- handler.on_sign(sign::minus);
- ++begin;
- break;
- case ' ':
- handler.on_sign(sign::space);
- ++begin;
- break;
- default:
- break;
- }
- if (begin == end) return begin;
-
- if (*begin == '#') {
- handler.on_hash();
- if (++begin == end) return begin;
- }
-
- // Parse zero flag.
- if (*begin == '0') {
- handler.on_zero();
- if (++begin == end) return begin;
- }
-
- begin = parse_width(begin, end, handler);
- if (begin == end) return begin;
+enum class state { start, align, sign, hash, zero, width, precision, locale };
- // Parse precision.
- if (*begin == '.') {
- begin = parse_precision(begin, end, handler);
+// Parses standard format specifiers.
+template <typename Char>
+FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(
+ const Char* begin, const Char* end, dynamic_format_specs<Char>& specs,
+ basic_format_parse_context<Char>& ctx, type arg_type) -> const Char* {
+ auto c = '\0';
+ if (end - begin > 1) {
+ auto next = to_ascii(begin[1]);
+ c = parse_align(next) == align::none ? to_ascii(*begin) : '\0';
+ } else {
if (begin == end) return begin;
+ c = to_ascii(*begin);
}
- if (*begin == 'L') {
- handler.on_localized();
- ++begin;
- }
+ struct {
+ state current_state = state::start;
+ FMT_CONSTEXPR void operator()(state s, bool valid = true) {
+ if (current_state >= s || !valid)
+ throw_format_error("invalid format specifier");
+ current_state = s;
+ }
+ } enter_state;
+
+ using pres = presentation_type;
+ constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
+ struct {
+ const Char*& begin;
+ dynamic_format_specs<Char>& specs;
+ type arg_type;
+
+ FMT_CONSTEXPR auto operator()(pres type, int set) -> const Char* {
+ if (!in(arg_type, set)) throw_format_error("invalid format specifier");
+ specs.type = type;
+ return begin + 1;
+ }
+ } parse_presentation_type{begin, specs, arg_type};
- // Parse type.
- if (begin != end && *begin != '}') {
- presentation_type type = parse_presentation_type(*begin++);
- if (type == presentation_type::none)
- handler.on_error("invalid type specifier");
- handler.on_type(type);
+ for (;;) {
+ switch (c) {
+ case '<':
+ case '>':
+ case '^':
+ enter_state(state::align);
+ specs.align = parse_align(c);
+ ++begin;
+ break;
+ case '+':
+ case '-':
+ case ' ':
+ enter_state(state::sign, in(arg_type, sint_set | float_set));
+ switch (c) {
+ case '+':
+ specs.sign = sign::plus;
+ break;
+ case '-':
+ specs.sign = sign::minus;
+ break;
+ case ' ':
+ specs.sign = sign::space;
+ break;
+ }
+ ++begin;
+ break;
+ case '#':
+ enter_state(state::hash, is_arithmetic_type(arg_type));
+ specs.alt = true;
+ ++begin;
+ break;
+ case '0':
+ enter_state(state::zero);
+ if (!is_arithmetic_type(arg_type))
+ throw_format_error("format specifier requires numeric argument");
+ if (specs.align == align::none) {
+ // Ignore 0 if align is specified for compatibility with std::format.
+ specs.align = align::numeric;
+ specs.fill[0] = Char('0');
+ }
+ ++begin;
+ break;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ case '{':
+ enter_state(state::width);
+ begin = parse_dynamic_spec(begin, end, specs.width, specs.width_ref, ctx);
+ break;
+ case '.':
+ enter_state(state::precision,
+ in(arg_type, float_set | string_set | cstring_set));
+ begin = parse_precision(begin, end, specs.precision, specs.precision_ref,
+ ctx);
+ break;
+ case 'L':
+ enter_state(state::locale, is_arithmetic_type(arg_type));
+ specs.localized = true;
+ ++begin;
+ break;
+ case 'd':
+ return parse_presentation_type(pres::dec, integral_set);
+ case 'o':
+ return parse_presentation_type(pres::oct, integral_set);
+ case 'x':
+ return parse_presentation_type(pres::hex_lower, integral_set);
+ case 'X':
+ return parse_presentation_type(pres::hex_upper, integral_set);
+ case 'b':
+ return parse_presentation_type(pres::bin_lower, integral_set);
+ case 'B':
+ return parse_presentation_type(pres::bin_upper, integral_set);
+ case 'a':
+ return parse_presentation_type(pres::hexfloat_lower, float_set);
+ case 'A':
+ return parse_presentation_type(pres::hexfloat_upper, float_set);
+ case 'e':
+ return parse_presentation_type(pres::exp_lower, float_set);
+ case 'E':
+ return parse_presentation_type(pres::exp_upper, float_set);
+ case 'f':
+ return parse_presentation_type(pres::fixed_lower, float_set);
+ case 'F':
+ return parse_presentation_type(pres::fixed_upper, float_set);
+ case 'g':
+ return parse_presentation_type(pres::general_lower, float_set);
+ case 'G':
+ return parse_presentation_type(pres::general_upper, float_set);
+ case 'c':
+ return parse_presentation_type(pres::chr, integral_set);
+ case 's':
+ return parse_presentation_type(pres::string,
+ bool_set | string_set | cstring_set);
+ case 'p':
+ return parse_presentation_type(pres::pointer, pointer_set | cstring_set);
+ case '?':
+ return parse_presentation_type(pres::debug,
+ char_set | string_set | cstring_set);
+ case '}':
+ return begin;
+ default: {
+ if (*begin == '}') return begin;
+ // Parse fill and alignment.
+ auto fill_end = begin + code_point_length(begin);
+ if (end - fill_end <= 0) {
+ throw_format_error("invalid format specifier");
+ return begin;
+ }
+ if (*begin == '{') {
+ throw_format_error("invalid fill character '{'");
+ return begin;
+ }
+ auto align = parse_align(to_ascii(*fill_end));
+ enter_state(state::align, align != align::none);
+ specs.fill = {begin, to_unsigned(fill_end - begin)};
+ specs.align = align;
+ begin = fill_end + 1;
+ }
+ }
+ if (begin == end) return begin;
+ c = to_ascii(*begin);
}
- return begin;
}
template <typename Char, typename Handler>
Handler& handler;
int arg_id;
- FMT_CONSTEXPR void operator()() { arg_id = handler.on_arg_id(); }
- FMT_CONSTEXPR void operator()(int id) { arg_id = handler.on_arg_id(id); }
- FMT_CONSTEXPR void operator()(basic_string_view<Char> id) {
+ FMT_CONSTEXPR void on_auto() { arg_id = handler.on_arg_id(); }
+ FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); }
+ FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
arg_id = handler.on_arg_id(id);
}
- FMT_CONSTEXPR void on_error(const char* message) {
- if (message) handler.on_error(message);
- }
};
++begin;
template <bool IS_CONSTEXPR, typename Char, typename Handler>
FMT_CONSTEXPR FMT_INLINE void parse_format_string(
basic_string_view<Char> format_str, Handler&& handler) {
- // Workaround a name-lookup bug in MSVC's modules implementation.
- using detail::find;
-
auto begin = format_str.data();
auto end = begin + format_str.size();
if (end - begin < 32) {
return;
}
struct writer {
- FMT_CONSTEXPR void operator()(const Char* pbegin, const Char* pend) {
- if (pbegin == pend) return;
+ FMT_CONSTEXPR void operator()(const Char* from, const Char* to) {
+ if (from == to) return;
for (;;) {
const Char* p = nullptr;
- if (!find<IS_CONSTEXPR>(pbegin, pend, Char('}'), p))
- return handler_.on_text(pbegin, pend);
+ if (!find<IS_CONSTEXPR>(from, to, Char('}'), p))
+ return handler_.on_text(from, to);
++p;
- if (p == pend || *p != '}')
+ if (p == to || *p != '}')
return handler_.on_error("unmatched '}' in format string");
- handler_.on_text(pbegin, p);
- pbegin = p + 1;
+ handler_.on_text(from, p);
+ from = p + 1;
}
}
Handler& handler_;
- } write{handler};
+ } write = {handler};
while (begin != end) {
// Doing two passes with memchr (one for '{' and another for '}') is up to
// 2.5x faster than the naive one-pass implementation on big format strings.
}
}
+template <typename T, bool = is_named_arg<T>::value> struct strip_named_arg {
+ using type = T;
+};
+template <typename T> struct strip_named_arg<T, true> {
+ using type = remove_cvref_t<decltype(T::value)>;
+};
+
template <typename T, typename ParseContext>
FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
-> decltype(ctx.begin()) {
using context = buffer_context<char_type>;
using mapped_type = conditional_t<
mapped_type_constant<T, context>::value != type::custom_type,
- decltype(arg_mapper<context>().map(std::declval<const T&>())), T>;
- auto f = conditional_t<has_formatter<mapped_type, context>::value,
- formatter<mapped_type, char_type>,
- fallback_formatter<T, char_type>>();
- return f.parse(ctx);
-}
-
-// A parse context with extra argument id checks. It is only used at compile
-// time because adding checks at runtime would introduce substantial overhead
-// and would be redundant since argument ids are checked when arguments are
-// retrieved anyway.
-template <typename Char, typename ErrorHandler = error_handler>
-class compile_parse_context
- : public basic_format_parse_context<Char, ErrorHandler> {
- private:
- int num_args_;
- using base = basic_format_parse_context<Char, ErrorHandler>;
-
- public:
- explicit FMT_CONSTEXPR compile_parse_context(
- basic_string_view<Char> format_str,
- int num_args = (std::numeric_limits<int>::max)(), ErrorHandler eh = {})
- : base(format_str, eh), num_args_(num_args) {}
-
- FMT_CONSTEXPR auto next_arg_id() -> int {
- int id = base::next_arg_id();
- if (id >= num_args_) this->on_error("argument not found");
- return id;
- }
-
- FMT_CONSTEXPR void check_arg_id(int id) {
- base::check_arg_id(id);
- if (id >= num_args_) this->on_error("argument not found");
+ decltype(arg_mapper<context>().map(std::declval<const T&>())),
+ typename strip_named_arg<T>::type>;
+#if defined(__cpp_if_constexpr)
+ if constexpr (std::is_default_constructible_v<
+ formatter<mapped_type, char_type>>) {
+ return formatter<mapped_type, char_type>().parse(ctx);
+ } else {
+ type_is_unformattable_for<T, char_type> _;
+ return ctx.begin();
}
- using base::check_arg_id;
-};
-
-template <typename ErrorHandler>
-FMT_CONSTEXPR void check_int_type_spec(presentation_type type,
- ErrorHandler&& eh) {
- if (type > presentation_type::bin_upper && type != presentation_type::chr)
- eh.on_error("invalid type specifier");
+#else
+ return formatter<mapped_type, char_type>().parse(ctx);
+#endif
}
-// Checks char specs and returns true if the type spec is char (and not int).
-template <typename Char, typename ErrorHandler = error_handler>
-FMT_CONSTEXPR auto check_char_specs(const basic_format_specs<Char>& specs,
- ErrorHandler&& eh = {}) -> bool {
+// Checks char specs and returns true iff the presentation type is char-like.
+template <typename Char>
+FMT_CONSTEXPR auto check_char_specs(const format_specs<Char>& specs) -> bool {
if (specs.type != presentation_type::none &&
- specs.type != presentation_type::chr) {
- check_int_type_spec(specs.type, eh);
+ specs.type != presentation_type::chr &&
+ specs.type != presentation_type::debug) {
return false;
}
if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
- eh.on_error("invalid format specifier for char");
+ throw_format_error("invalid format specifier for char");
return true;
}
-// A floating-point presentation format.
-enum class float_format : unsigned char {
- general, // General: exponent notation or fixed point based on magnitude.
- exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3.
- fixed, // Fixed point with the default precision of 6, e.g. 0.0012.
- hex
-};
-
-struct float_specs {
- int precision;
- float_format format : 8;
- sign_t sign : 8;
- bool upper : 1;
- bool locale : 1;
- bool binary32 : 1;
- bool fallback : 1;
- bool showpoint : 1;
-};
-
-template <typename ErrorHandler = error_handler, typename Char>
-FMT_CONSTEXPR auto parse_float_type_spec(const basic_format_specs<Char>& specs,
- ErrorHandler&& eh = {})
- -> float_specs {
- auto result = float_specs();
- result.showpoint = specs.alt;
- result.locale = specs.localized;
- switch (specs.type) {
- case presentation_type::none:
- result.format = float_format::general;
- break;
- case presentation_type::general_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::general_lower:
- result.format = float_format::general;
- break;
- case presentation_type::exp_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::exp_lower:
- result.format = float_format::exp;
- result.showpoint |= specs.precision != 0;
- break;
- case presentation_type::fixed_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::fixed_lower:
- result.format = float_format::fixed;
- result.showpoint |= specs.precision != 0;
- break;
- case presentation_type::hexfloat_upper:
- result.upper = true;
- FMT_FALLTHROUGH;
- case presentation_type::hexfloat_lower:
- result.format = float_format::hex;
- break;
- default:
- eh.on_error("invalid type specifier");
- break;
- }
- return result;
-}
-
-template <typename ErrorHandler = error_handler>
-FMT_CONSTEXPR auto check_cstring_type_spec(presentation_type type,
- ErrorHandler&& eh = {}) -> bool {
- if (type == presentation_type::none || type == presentation_type::string)
- return true;
- if (type != presentation_type::pointer) eh.on_error("invalid type specifier");
- return false;
-}
-
-template <typename ErrorHandler = error_handler>
-FMT_CONSTEXPR void check_string_type_spec(presentation_type type,
- ErrorHandler&& eh = {}) {
- if (type != presentation_type::none && type != presentation_type::string)
- eh.on_error("invalid type specifier");
-}
-
-template <typename ErrorHandler>
-FMT_CONSTEXPR void check_pointer_type_spec(presentation_type type,
- ErrorHandler&& eh) {
- if (type != presentation_type::none && type != presentation_type::pointer)
- eh.on_error("invalid type specifier");
-}
-
-// A parse_format_specs handler that checks if specifiers are consistent with
-// the argument type.
-template <typename Handler> class specs_checker : public Handler {
- private:
- detail::type arg_type_;
-
- FMT_CONSTEXPR void require_numeric_argument() {
- if (!is_arithmetic_type(arg_type_))
- this->on_error("format specifier requires numeric argument");
- }
-
- public:
- FMT_CONSTEXPR specs_checker(const Handler& handler, detail::type arg_type)
- : Handler(handler), arg_type_(arg_type) {}
-
- FMT_CONSTEXPR void on_align(align_t align) {
- if (align == align::numeric) require_numeric_argument();
- Handler::on_align(align);
- }
-
- FMT_CONSTEXPR void on_sign(sign_t s) {
- require_numeric_argument();
- if (is_integral_type(arg_type_) && arg_type_ != type::int_type &&
- arg_type_ != type::long_long_type && arg_type_ != type::char_type) {
- this->on_error("format specifier requires signed argument");
- }
- Handler::on_sign(s);
- }
-
- FMT_CONSTEXPR void on_hash() {
- require_numeric_argument();
- Handler::on_hash();
- }
-
- FMT_CONSTEXPR void on_localized() {
- require_numeric_argument();
- Handler::on_localized();
- }
-
- FMT_CONSTEXPR void on_zero() {
- require_numeric_argument();
- Handler::on_zero();
- }
-
- FMT_CONSTEXPR void end_precision() {
- if (is_integral_type(arg_type_) || arg_type_ == type::pointer_type)
- this->on_error("precision not allowed for this argument type");
- }
-};
-
-constexpr int invalid_arg_index = -1;
-
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <int N, typename T, typename... Args, typename Char>
constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
- if constexpr (detail::is_statically_named_arg<T>()) {
+ if constexpr (is_statically_named_arg<T>()) {
if (name == T::name) return N;
}
if constexpr (sizeof...(Args) > 0)
return get_arg_index_by_name<N + 1, Args...>(name);
(void)name; // Workaround an MSVC bug about "unused" parameter.
- return invalid_arg_index;
+ return -1;
}
#endif
template <typename... Args, typename Char>
FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
if constexpr (sizeof...(Args) > 0)
return get_arg_index_by_name<0, Args...>(name);
#endif
(void)name;
- return invalid_arg_index;
+ return -1;
}
-template <typename Char, typename ErrorHandler, typename... Args>
-class format_string_checker {
+template <typename Char, typename... Args> class format_string_checker {
private:
- using parse_context_type = compile_parse_context<Char, ErrorHandler>;
- enum { num_args = sizeof...(Args) };
+ using parse_context_type = compile_parse_context<Char>;
+ static constexpr int num_args = sizeof...(Args);
// Format specifier parsing function.
+ // In the future basic_format_parse_context will replace compile_parse_context
+ // here and will use is_constant_evaluated and downcasting to access the data
+ // needed for compile-time checks: https://godbolt.org/z/GvWzcTjh1.
using parse_func = const Char* (*)(parse_context_type&);
+ type types_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
parse_context_type context_;
- parse_func parse_funcs_[num_args > 0 ? num_args : 1];
+ parse_func parse_funcs_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
public:
- explicit FMT_CONSTEXPR format_string_checker(
- basic_string_view<Char> format_str, ErrorHandler eh)
- : context_(format_str, num_args, eh),
+ explicit FMT_CONSTEXPR format_string_checker(basic_string_view<Char> fmt)
+ : types_{mapped_type_constant<Args, buffer_context<Char>>::value...},
+ context_(fmt, num_args, types_),
parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
return context_.check_arg_id(id), id;
}
FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
auto index = get_arg_index_by_name<Args...>(id);
- if (index == invalid_arg_index) on_error("named argument is not found");
- return context_.check_arg_id(index), index;
+ if (index < 0) on_error("named argument is not found");
+ return index;
#else
(void)id;
on_error("compile-time checks for named arguments require C++20 support");
#endif
}
- FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
+ FMT_CONSTEXPR void on_replacement_field(int id, const Char* begin) {
+ on_format_specs(id, begin, begin); // Call parse() on empty specs.
+ }
FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
-> const Char* {
- context_.advance_to(context_.begin() + (begin - &*context_.begin()));
+ context_.advance_to(begin);
// id >= 0 check is a workaround for gcc 10 bug (#2065).
return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
}
FMT_CONSTEXPR void on_error(const char* message) {
- context_.on_error(message);
+ throw_format_error(message);
}
};
+// Reports a compile-time error if S is not a valid format string.
+template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
+FMT_INLINE void check_format_string(const S&) {
+#ifdef FMT_ENFORCE_COMPILE_STRING
+ static_assert(is_compile_string<S>::value,
+ "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
+ "FMT_STRING.");
+#endif
+}
template <typename... Args, typename S,
- enable_if_t<(is_compile_string<S>::value), int>>
+ FMT_ENABLE_IF(is_compile_string<S>::value)>
void check_format_string(S format_str) {
- FMT_CONSTEXPR auto s = to_string_view(format_str);
- using checker = format_string_checker<typename S::char_type, error_handler,
- remove_cvref_t<Args>...>;
- FMT_CONSTEXPR bool invalid_format =
- (parse_format_string<true>(s, checker(s, {})), true);
- ignore_unused(invalid_format);
+ using char_t = typename S::char_type;
+ FMT_CONSTEXPR auto s = basic_string_view<char_t>(format_str);
+ using checker = format_string_checker<char_t, remove_cvref_t<Args>...>;
+ FMT_CONSTEXPR bool error = (parse_format_string<true>(s, checker(s)), true);
+ ignore_unused(error);
}
+template <typename Char = char> struct vformat_args {
+ using type = basic_format_args<
+ basic_format_context<std::back_insert_iterator<buffer<Char>>, Char>>;
+};
+template <> struct vformat_args<char> { using type = format_args; };
+
+// Use vformat_args and avoid type_identity to keep symbols short.
template <typename Char>
-void vformat_to(
- buffer<Char>& buf, basic_string_view<Char> fmt,
- basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
- locale_ref loc = {});
+void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
+ typename vformat_args<Char>::type args, locale_ref loc = {});
FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
#ifndef _WIN32
inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
#endif
-FMT_END_DETAIL_NAMESPACE
+} // namespace detail
+
+FMT_BEGIN_EXPORT
-// A formatter specialization for the core types corresponding to detail::type
-// constants.
+// A formatter specialization for natively supported types.
template <typename T, typename Char>
struct formatter<T, Char,
enable_if_t<detail::type_constant<T, Char>::value !=
detail::dynamic_format_specs<Char> specs_;
public:
- // Parses format specifiers stopping either at the end of the range or at the
- // terminating '}'.
template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
- auto begin = ctx.begin(), end = ctx.end();
- if (begin == end) return begin;
- using handler_type = detail::dynamic_specs_handler<ParseContext>;
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
auto type = detail::type_constant<T, Char>::value;
- auto checker =
- detail::specs_checker<handler_type>(handler_type(specs_, ctx), type);
- auto it = detail::parse_format_specs(begin, end, checker);
- auto eh = ctx.error_handler();
- switch (type) {
- case detail::type::none_type:
- FMT_ASSERT(false, "invalid argument type");
- break;
- case detail::type::bool_type:
- if (specs_.type == presentation_type::none ||
- specs_.type == presentation_type::string) {
- break;
- }
- FMT_FALLTHROUGH;
- case detail::type::int_type:
- case detail::type::uint_type:
- case detail::type::long_long_type:
- case detail::type::ulong_long_type:
- case detail::type::int128_type:
- case detail::type::uint128_type:
- detail::check_int_type_spec(specs_.type, eh);
- break;
- case detail::type::char_type:
- detail::check_char_specs(specs_, eh);
- break;
- case detail::type::float_type:
- if (detail::const_check(FMT_USE_FLOAT))
- detail::parse_float_type_spec(specs_, eh);
- else
- FMT_ASSERT(false, "float support disabled");
- break;
- case detail::type::double_type:
- if (detail::const_check(FMT_USE_DOUBLE))
- detail::parse_float_type_spec(specs_, eh);
- else
- FMT_ASSERT(false, "double support disabled");
- break;
- case detail::type::long_double_type:
- if (detail::const_check(FMT_USE_LONG_DOUBLE))
- detail::parse_float_type_spec(specs_, eh);
- else
- FMT_ASSERT(false, "long double support disabled");
- break;
- case detail::type::cstring_type:
- detail::check_cstring_type_spec(specs_.type, eh);
- break;
- case detail::type::string_type:
- detail::check_string_type_spec(specs_.type, eh);
- break;
- case detail::type::pointer_type:
- detail::check_pointer_type_spec(specs_.type, eh);
- break;
- case detail::type::custom_type:
- // Custom format specifiers are checked in parse functions of
- // formatter specializations.
- break;
- }
- return it;
+ auto end =
+ detail::parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, type);
+ if (type == detail::type::char_type) detail::check_char_specs(specs_);
+ return end;
+ }
+
+ template <detail::type U = detail::type_constant<T, Char>::value,
+ FMT_ENABLE_IF(U == detail::type::string_type ||
+ U == detail::type::cstring_type ||
+ U == detail::type::char_type)>
+ FMT_CONSTEXPR void set_debug_format(bool set = true) {
+ specs_.type = set ? presentation_type::debug : presentation_type::none;
}
template <typename FormatContext>
-> decltype(ctx.out());
};
-template <typename Char> struct basic_runtime { basic_string_view<Char> str; };
+template <typename Char = char> struct runtime_format_string {
+ basic_string_view<Char> str;
+};
/** A compile-time format string. */
template <typename Char, typename... Args> class basic_format_string {
#ifdef FMT_HAS_CONSTEVAL
if constexpr (detail::count_named_args<Args...>() ==
detail::count_statically_named_args<Args...>()) {
- using checker = detail::format_string_checker<Char, detail::error_handler,
-
remove_cvref_t<Args>...>;
- detail::parse_format_string<true>(str_, checker(s, {}));
+ using checker =
+
detail::format_string_checker<Char, remove_cvref_t<Args>...>;
+ detail::parse_format_string<true>(str_, checker(s));
}
#else
detail::check_format_string<Args...>(s);
#endif
}
- basic_format_string(basic_runtime<Char> r) : str_(r.str) {}
+ basic_format_string(runtime_format_string<Char> fmt) : str_(fmt.str) {}
FMT_INLINE operator basic_string_view<Char>() const { return str_; }
+ FMT_INLINE auto get() const -> basic_string_view<Char> { return str_; }
};
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
// Workaround broken conversion on older gcc.
-template <typename... Args> using format_string = string_view;
-template <typename S> auto runtime(const S& s) -> basic_string_view<char_t<S>> {
- return s;
-}
+template <typename...> using format_string = string_view;
+inline auto runtime(string_view s) -> string_view { return s; }
#else
template <typename... Args>
using format_string = basic_format_string<char, type_identity_t<Args>...>;
fmt::print(fmt::runtime("{:d}"), "I am not a number");
\endrst
*/
-template <typename S> auto runtime(const S& s) -> basic_runtime<char_t<S>> {
- return {{s}};
-}
+inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; }
#endif
FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
template <typename OutputIt,
FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
- using detail::get_buffer;
- auto&& buf = get_buffer<char>(out);
+ auto&& buf = detail::get_buffer<char>(out);
detail::vformat_to(buf, fmt, args, {});
- return detail::get_iterator(buf);
+ return detail::get_iterator(buf, out);
}
/**
FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
T&&... args) -> size_t {
auto buf = detail::counting_buffer<>();
- detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...), {});
+ detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...), {});
return buf.count();
}
: detail::vprint_mojibake(f, fmt, vargs);
}
-FMT_MODULE_EXPORT_END
+/**
+ Formats ``args`` according to specifications in ``fmt`` and writes the
+ output to the file ``f`` followed by a newline.
+ */
+template <typename... T>
+FMT_INLINE void println(std::FILE* f, format_string<T...> fmt, T&&... args) {
+ return fmt::print(f, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+/**
+ Formats ``args`` according to specifications in ``fmt`` and writes the output
+ to ``stdout`` followed by a newline.
+ */
+template <typename... T>
+FMT_INLINE void println(format_string<T...> fmt, T&&... args) {
+ return fmt::println(stdout, fmt, std::forward<T>(args)...);
+}
+
+FMT_END_EXPORT
FMT_GCC_PRAGMA("GCC pop_options")
FMT_END_NAMESPACE
#define FMT_FORMAT_INL_H_
#include <algorithm>
-#include <cctype>
#include <cerrno> // errno
#include <climits>
#include <cmath>
-#include <cstdarg>
-#include <cstring> // std::memmove
-#include <cwchar>
#include <exception>
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
FMT_THROW(format_error(message));
}
-#ifndef _MSC_VER
-# define FMT_SNPRINTF snprintf
-#else // _MSC_VER
-inline int fmt_snprintf(char* buffer, size_t size, const char* format, ...) {
- va_list args;
- va_start(args, format);
- int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
- va_end(args);
- return result;
-}
-# define FMT_SNPRINTF fmt_snprintf
-#endif // _MSC_VER
-
FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
- string_view message) FMT_NOEXCEPT {
+ string_view message) noexcept {
// Report error code making sure that the output fits into
// inline_buffer_size to avoid dynamic memory allocation and potential
// bad_alloc.
}
FMT_FUNC void report_error(format_func func, int error_code,
- const char* message) FMT_NOEXCEPT {
+ const char* message) noexcept {
memory_buffer full_message;
func(full_message, error_code, message);
// Don't use fwrite_fully because the latter may throw.
inline void fwrite_fully(const void* ptr, size_t size, size_t count,
FILE* stream) {
size_t written = std::fwrite(ptr, size, count, stream);
- if (written < count) FMT_THROW(system_error(errno, "cannot write to file"));
+ if (written < count)
+ FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
}
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
return '.';
}
#endif
-} // namespace detail
-#if !FMT_MSC_VER
-FMT_API FMT_FUNC format_error::~format_error() FMT_NOEXCEPT = default;
+FMT_FUNC auto write_loc(appender out, loc_value value,
+ const format_specs<>& specs, locale_ref loc) -> bool {
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+ auto locale = loc.get<std::locale>();
+ // We cannot use the num_put<char> facet because it may produce output in
+ // a wrong encoding.
+ using facet = format_facet<std::locale>;
+ if (std::has_facet<facet>(locale))
+ return std::use_facet<facet>(locale).put(out, value, specs);
+ return facet(locale).put(out, value, specs);
#endif
-
-FMT_FUNC std::system_error vsystem_error(int error_code, string_view format_str,
- format_args args) {
- auto ec = std::error_code(error_code, std::generic_category());
- return std::system_error(ec, vformat(format_str, args));
+ return false;
}
+} // namespace detail
-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;
-}
-
-// log10(2) = 0x0.4d104d427de7fbcc...
-static constexpr uint64_t log10_2_significand = 0x4d104d427de7fbcc;
-
-template <typename T = void> struct basic_impl_data {
- // Normalized 64-bit significands of pow(10, k), for k = -348, -340, ..., 340.
- // These are generated by support/compute-powers.py.
- static constexpr uint64_t pow10_significands[87] = {
- 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, 0x8b16fb203055ac76,
- 0xcf42894a5dce35ea, 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df,
- 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, 0xbe5691ef416bd60c,
- 0x8dd01fad907ffc3c, 0xd3515c2831559a83, 0x9d71ac8fada6c9b5,
- 0xea9c227723ee8bcb, 0xaecc49914078536d, 0x823c12795db6ce57,
- 0xc21094364dfb5637, 0x9096ea6f3848984f, 0xd77485cb25823ac7,
- 0xa086cfcd97bf97f4, 0xef340a98172aace5, 0xb23867fb2a35b28e,
- 0x84c8d4dfd2c63f3b, 0xc5dd44271ad3cdba, 0x936b9fcebb25c996,
- 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, 0xf3e2f893dec3f126,
- 0xb5b5ada8aaff80b8, 0x87625f056c7c4a8b, 0xc9bcff6034c13053,
- 0x964e858c91ba2655, 0xdff9772470297ebd, 0xa6dfbd9fb8e5b88f,
- 0xf8a95fcf88747d94, 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b,
- 0xcdb02555653131b6, 0x993fe2c6d07b7fac, 0xe45c10c42a2b3b06,
- 0xaa242499697392d3, 0xfd87b5f28300ca0e, 0xbce5086492111aeb,
- 0x8cbccc096f5088cc, 0xd1b71758e219652c, 0x9c40000000000000,
- 0xe8d4a51000000000, 0xad78ebc5ac620000, 0x813f3978f8940984,
- 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, 0xd5d238a4abe98068,
- 0x9f4f2726179a2245, 0xed63a231d4c4fb27, 0xb0de65388cc8ada8,
- 0x83c7088e1aab65db, 0xc45d1df942711d9a, 0x924d692ca61be758,
- 0xda01ee641a708dea, 0xa26da3999aef774a, 0xf209787bb47d6b85,
- 0xb454e4a179dd1877, 0x865b86925b9bc5c2, 0xc83553c5c8965d3d,
- 0x952ab45cfa97a0b3, 0xde469fbd99a05fe3, 0xa59bc234db398c25,
- 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, 0x88fcf317f22241e2,
- 0xcc20ce9bd35c78a5, 0x98165af37b2153df, 0xe2a0b5dc971f303a,
- 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, 0xbb764c4ca7a44410,
- 0x8bab8eefb6409c1a, 0xd01fef10a657842c, 0x9b10a4e5e9913129,
- 0xe7109bfba19c0c9d, 0xac2820d9623bf429, 0x80444b5e7aa7cf85,
- 0xbf21e44003acdd2d, 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841,
- 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, 0xaf87023b9bf0ee6b,
- };
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-# pragma GCC diagnostic push
-# pragma GCC diagnostic ignored "-Wnarrowing"
-#endif
- // Binary exponents of pow(10, k), for k = -348, -340, ..., 340, corresponding
- // to significands above.
- static constexpr int16_t pow10_exponents[87] = {
- -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, -954,
- -927, -901, -874, -847, -821, -794, -768, -741, -715, -688, -661,
- -635, -608, -582, -555, -529, -502, -475, -449, -422, -396, -369,
- -343, -316, -289, -263, -236, -210, -183, -157, -130, -103, -77,
- -50, -24, 3, 30, 56, 83, 109, 136, 162, 189, 216,
- 242, 269, 295, 322, 348, 375, 402, 428, 455, 481, 508,
- 534, 561, 588, 614, 641, 667, 694, 720, 747, 774, 800,
- 827, 853, 880, 907, 933, 960, 986, 1013, 1039, 1066};
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-# pragma GCC diagnostic pop
-#endif
-
- static constexpr uint64_t power_of_10_64[20] = {
- 1, FMT_POWERS_OF_10(1ULL), FMT_POWERS_OF_10(1000000000ULL),
- 10000000000000000000ULL};
-};
-
-// This is a struct rather than an alias to avoid shadowing warnings in gcc.
-struct impl_data : basic_impl_data<> {};
+template <typename Locale> typename Locale::id format_facet<Locale>::id;
-#if __cplusplus < 201703L
-template <typename T>
-constexpr uint64_t basic_impl_data<T>::pow10_significands[];
-template <typename T> constexpr int16_t basic_impl_data<T>::pow10_exponents[];
-template <typename T> constexpr uint64_t basic_impl_data<T>::power_of_10_64[];
-#endif
-
-template <typename T> struct bits {
- static FMT_CONSTEXPR_DECL const int value =
- static_cast<int>(sizeof(T) * std::numeric_limits<unsigned char>::digits);
-};
-
-// Returns the number of significand bits in Float excluding the implicit bit.
-template <typename Float> constexpr int num_significand_bits() {
- // Subtract 1 to account for an implicit most significant bit in the
- // normalized form.
- return std::numeric_limits<Float>::digits - 1;
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template <typename Locale> format_facet<Locale>::format_facet(Locale& loc) {
+ auto& numpunct = std::use_facet<std::numpunct<char>>(loc);
+ grouping_ = numpunct.grouping();
+ if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep());
}
-// A floating-point number f * pow(2, e).
-struct fp {
- uint64_t f;
- int e;
-
- static constexpr const int num_significand_bits = bits<decltype(f)>::value;
-
- constexpr fp() : f(0), e(0) {}
- constexpr fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
-
- // Constructs fp from an IEEE754 floating-point number. It is a template to
- // prevent compile errors on systems where n is not IEEE754.
- template <typename Float> explicit FMT_CONSTEXPR fp(Float n) { assign(n); }
-
- template <typename Float>
- using is_supported = bool_constant<sizeof(Float) == sizeof(uint64_t) ||
- sizeof(Float) == sizeof(uint32_t)>;
-
- // Assigns d to this and return true iff predecessor is closer than successor.
- template <typename Float, FMT_ENABLE_IF(is_supported<Float>::value)>
- FMT_CONSTEXPR bool assign(Float n) {
- // Assume float is in the format [sign][exponent][significand].
- const int num_float_significand_bits =
- detail::num_significand_bits<Float>();
- const uint64_t implicit_bit = 1ULL << num_float_significand_bits;
- const uint64_t significand_mask = implicit_bit - 1;
- constexpr bool is_double = sizeof(Float) == sizeof(uint64_t);
- auto u = bit_cast<conditional_t<is_double, uint64_t, uint32_t>>(n);
- f = u & significand_mask;
- const uint64_t exponent_mask = (~0ULL >> 1) & ~significand_mask;
- int biased_e =
- static_cast<int>((u & exponent_mask) >> num_float_significand_bits);
- // The predecessor is closer if n is a normalized power of 2 (f == 0) other
- // than the smallest normalized number (biased_e > 1).
- bool is_predecessor_closer = f == 0 && biased_e > 1;
- if (biased_e != 0)
- f += implicit_bit;
- else
- biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
- const int exponent_bias = std::numeric_limits<Float>::max_exponent - 1;
- e = biased_e - exponent_bias - num_float_significand_bits;
- return is_predecessor_closer;
- }
-
- template <typename Float, FMT_ENABLE_IF(!is_supported<Float>::value)>
- bool assign(Float) {
- FMT_ASSERT(false, "");
- return false;
- }
-};
-
-// Normalizes the value converted from double and multiplied by (1 << SHIFT).
-template <int SHIFT = 0> FMT_CONSTEXPR fp normalize(fp value) {
- // Handle subnormals.
- const uint64_t implicit_bit = 1ULL << num_significand_bits<double>();
- const auto shifted_implicit_bit = implicit_bit << SHIFT;
- while ((value.f & shifted_implicit_bit) == 0) {
- value.f <<= 1;
- --value.e;
- }
- // Subtract 1 to account for hidden bit.
- const auto offset =
- fp::num_significand_bits - num_significand_bits<double>() - SHIFT - 1;
- value.f <<= offset;
- value.e -= offset;
- return value;
+template <>
+FMT_API FMT_FUNC auto format_facet<std::locale>::do_put(
+ appender out, loc_value val, const format_specs<>& specs) const -> bool {
+ return val.visit(
+ detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_});
}
-
-inline bool operator==(fp x, fp y) { return x.f == y.f && x.e == y.e; }
-
-// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
-FMT_CONSTEXPR inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
-#if FMT_USE_INT128
- auto product = static_cast<__uint128_t>(lhs) * rhs;
- auto f = static_cast<uint64_t>(product >> 64);
- return (static_cast<uint64_t>(product) & (1ULL << 63)) != 0 ? f + 1 : f;
-#else
- // Multiply 32-bit parts of significands.
- uint64_t mask = (1ULL << 32) - 1;
- uint64_t a = lhs >> 32, b = lhs & mask;
- uint64_t c = rhs >> 32, d = rhs & mask;
- uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
- // Compute mid 64-bit of result and round.
- uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
- return ac + (ad >> 32) + (bc >> 32) + (mid >> 32);
#endif
-}
-
-FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
- return {multiply(x.f, y.f), x.e + y.e + 64};
-}
-// Returns a cached power of 10 `c_k = c_k.f * pow(2, c_k.e)` such that its
-// (binary) exponent satisfies `min_exponent <= c_k.e <= min_exponent + 28`.
-FMT_CONSTEXPR inline fp get_cached_power(int min_exponent,
- int& pow10_exponent) {
- const int shift = 32;
- const auto significand = static_cast<int64_t>(log10_2_significand);
- int index = static_cast<int>(
- ((min_exponent + fp::num_significand_bits - 1) * (significand >> shift) +
- ((int64_t(1) << shift) - 1)) // ceil
- >> 32 // arithmetic shift
- );
- // Decimal exponent of the first (smallest) cached power of 10.
- const int first_dec_exp = -348;
- // Difference between 2 consecutive decimal exponents in cached powers of 10.
- const int dec_exp_step = 8;
- index = (index - first_dec_exp - 1) / dec_exp_step + 1;
- pow10_exponent = first_dec_exp + index * dec_exp_step;
- return {impl_data::pow10_significands[index],
- impl_data::pow10_exponents[index]};
+FMT_FUNC std::system_error vsystem_error(int error_code, string_view fmt,
+ format_args args) {
+ auto ec = std::error_code(error_code, std::generic_category());
+ return std::system_error(ec, vformat(fmt, args));
}
-// A simple accumulator to hold the sums of terms in bigint::square if uint128_t
-// is not available.
-struct accumulator {
- uint64_t lower;
- uint64_t upper;
-
- constexpr accumulator() : lower(0), upper(0) {}
- constexpr explicit operator uint32_t() const {
- return static_cast<uint32_t>(lower);
- }
-
- FMT_CONSTEXPR void operator+=(uint64_t n) {
- lower += n;
- if (lower < n) ++upper;
- }
- FMT_CONSTEXPR void operator>>=(int shift) {
- FMT_ASSERT(shift == 32, "");
- (void)shift;
- lower = (upper << 32) | (lower >> 32);
- upper >>= 32;
- }
-};
-
-class bigint {
- private:
- // A bigint is stored as an array of bigits (big digits), with bigit at index
- // 0 being the least significant one.
- using bigit = uint32_t;
- using double_bigit = uint64_t;
- enum { bigits_capacity = 32 };
- basic_memory_buffer<bigit, bigits_capacity> bigits_;
- int exp_;
-
- FMT_CONSTEXPR20 bigit operator[](int index) const {
- return bigits_[to_unsigned(index)];
- }
- FMT_CONSTEXPR20 bigit& operator[](int index) {
- return bigits_[to_unsigned(index)];
- }
-
- static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
-
- friend struct formatter<bigint>;
-
- FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
- auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
- (*this)[index] = static_cast<bigit>(result);
- borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
- }
-
- FMT_CONSTEXPR20 void remove_leading_zeros() {
- int num_bigits = static_cast<int>(bigits_.size()) - 1;
- while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
- bigits_.resize(to_unsigned(num_bigits + 1));
- }
-
- // Computes *this -= other assuming aligned bigints and *this >= other.
- FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
- FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
- FMT_ASSERT(compare(*this, other) >= 0, "");
- bigit borrow = 0;
- int i = other.exp_ - exp_;
- for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
- subtract_bigits(i, other.bigits_[j], borrow);
- while (borrow > 0) subtract_bigits(i, 0, borrow);
- remove_leading_zeros();
- }
-
- FMT_CONSTEXPR20 void multiply(uint32_t value) {
- const double_bigit wide_value = value;
- bigit carry = 0;
- for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
- double_bigit result = bigits_[i] * wide_value + carry;
- bigits_[i] = static_cast<bigit>(result);
- carry = static_cast<bigit>(result >> bigit_bits);
- }
- if (carry != 0) bigits_.push_back(carry);
- }
-
- FMT_CONSTEXPR20 void multiply(uint64_t value) {
- const bigit mask = ~bigit(0);
- const double_bigit lower = value & mask;
- const double_bigit upper = value >> bigit_bits;
- double_bigit carry = 0;
- for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
- double_bigit result = bigits_[i] * lower + (carry & mask);
- carry =
- bigits_[i] * upper + (result >> bigit_bits) + (carry >> bigit_bits);
- bigits_[i] = static_cast<bigit>(result);
- }
- while (carry != 0) {
- bigits_.push_back(carry & mask);
- carry >>= bigit_bits;
- }
- }
-
- public:
- FMT_CONSTEXPR20 bigint() : exp_(0) {}
- explicit bigint(uint64_t n) { assign(n); }
- FMT_CONSTEXPR20 ~bigint() {
- FMT_ASSERT(bigits_.capacity() <= bigits_capacity, "");
- }
-
- bigint(const bigint&) = delete;
- void operator=(const bigint&) = delete;
-
- FMT_CONSTEXPR20 void assign(const bigint& other) {
- auto size = other.bigits_.size();
- bigits_.resize(size);
- auto data = other.bigits_.data();
- std::copy(data, data + size, make_checked(bigits_.data(), size));
- exp_ = other.exp_;
- }
-
- FMT_CONSTEXPR20 void assign(uint64_t n) {
- size_t num_bigits = 0;
- do {
- bigits_[num_bigits++] = n & ~bigit(0);
- n >>= bigit_bits;
- } while (n != 0);
- bigits_.resize(num_bigits);
- exp_ = 0;
- }
-
- FMT_CONSTEXPR20 int num_bigits() const {
- return static_cast<int>(bigits_.size()) + exp_;
- }
-
- FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
- FMT_ASSERT(shift >= 0, "");
- exp_ += shift / bigit_bits;
- shift %= bigit_bits;
- if (shift == 0) return *this;
- bigit carry = 0;
- for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
- bigit c = bigits_[i] >> (bigit_bits - shift);
- bigits_[i] = (bigits_[i] << shift) + carry;
- carry = c;
- }
- if (carry != 0) bigits_.push_back(carry);
- return *this;
- }
-
- template <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
- FMT_ASSERT(value > 0, "");
- multiply(uint32_or_64_or_128_t<Int>(value));
- return *this;
- }
-
- friend FMT_CONSTEXPR20 int compare(const bigint& lhs, const bigint& rhs) {
- int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
- if (num_lhs_bigits != num_rhs_bigits)
- return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
- int i = static_cast<int>(lhs.bigits_.size()) - 1;
- int j = static_cast<int>(rhs.bigits_.size()) - 1;
- int end = i - j;
- if (end < 0) end = 0;
- for (; i >= end; --i, --j) {
- bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
- if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
- }
- if (i != j) return i > j ? 1 : -1;
- return 0;
- }
-
- // Returns compare(lhs1 + lhs2, rhs).
- friend FMT_CONSTEXPR20 int add_compare(const bigint& lhs1, const bigint& lhs2,
- const bigint& rhs) {
- int max_lhs_bigits = (std::max)(lhs1.num_bigits(), lhs2.num_bigits());
- int num_rhs_bigits = rhs.num_bigits();
- if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
- if (max_lhs_bigits > num_rhs_bigits) return 1;
- auto get_bigit = [](const bigint& n, int i) -> bigit {
- return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
- };
- double_bigit borrow = 0;
- int min_exp = (std::min)((std::min)(lhs1.exp_, lhs2.exp_), rhs.exp_);
- for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
- double_bigit sum =
- static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
- bigit rhs_bigit = get_bigit(rhs, i);
- if (sum > rhs_bigit + borrow) return 1;
- borrow = rhs_bigit + borrow - sum;
- if (borrow > 1) return -1;
- borrow <<= bigit_bits;
- }
- return borrow != 0 ? -1 : 0;
- }
-
- // Assigns pow(10, exp) to this bigint.
- FMT_CONSTEXPR20 void assign_pow10(int exp) {
- FMT_ASSERT(exp >= 0, "");
- if (exp == 0) return assign(1);
- // Find the top bit.
- int bitmask = 1;
- while (exp >= bitmask) bitmask <<= 1;
- bitmask >>= 1;
- // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
- // repeated squaring and multiplication.
- assign(5);
- bitmask >>= 1;
- while (bitmask != 0) {
- square();
- if ((exp & bitmask) != 0) *this *= 5;
- bitmask >>= 1;
- }
- *this <<= exp; // Multiply by pow(2, exp) by shifting.
- }
-
- FMT_CONSTEXPR20 void square() {
- int num_bigits = static_cast<int>(bigits_.size());
- int num_result_bigits = 2 * num_bigits;
- basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
- bigits_.resize(to_unsigned(num_result_bigits));
- using accumulator_t = conditional_t<FMT_USE_INT128, uint128_t, accumulator>;
- auto sum = accumulator_t();
- for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) {
- // Compute bigit at position bigit_index of the result by adding
- // cross-product terms n[i] * n[j] such that i + j == bigit_index.
- for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
- // Most terms are multiplied twice which can be optimized in the future.
- sum += static_cast<double_bigit>(n[i]) * n[j];
- }
- (*this)[bigit_index] = static_cast<bigit>(sum);
- sum >>= bits<bigit>::value; // Compute the carry.
- }
- // Do the same for the top half.
- for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
- ++bigit_index) {
- for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
- sum += static_cast<double_bigit>(n[i++]) * n[j--];
- (*this)[bigit_index] = static_cast<bigit>(sum);
- sum >>= bits<bigit>::value;
- }
- remove_leading_zeros();
- exp_ *= 2;
- }
-
- // If this bigint has a bigger exponent than other, adds trailing zero to make
- // exponents equal. This simplifies some operations such as subtraction.
- FMT_CONSTEXPR20 void align(const bigint& other) {
- int exp_difference = exp_ - other.exp_;
- if (exp_difference <= 0) return;
- int num_bigits = static_cast<int>(bigits_.size());
- bigits_.resize(to_unsigned(num_bigits + exp_difference));
- for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
- bigits_[j] = bigits_[i];
- std::uninitialized_fill_n(bigits_.data(), exp_difference, 0);
- exp_ -= exp_difference;
- }
-
- // Divides this bignum by divisor, assigning the remainder to this and
- // returning the quotient.
- FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
- FMT_ASSERT(this != &divisor, "");
- if (compare(*this, divisor) < 0) return 0;
- FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
- align(divisor);
- int quotient = 0;
- do {
- subtract_aligned(divisor);
- ++quotient;
- } while (compare(*this, divisor) >= 0);
- return quotient;
- }
-};
+namespace detail {
-enum class round_direction { unknown, up, down };
-
-// Given the divisor (normally a power of 10), the remainder = v % divisor for
-// some number v and the error, returns whether v should be rounded up, down, or
-// whether the rounding direction can't be determined due to error.
-// error should be less than divisor / 2.
-FMT_CONSTEXPR inline round_direction get_round_direction(uint64_t divisor,
- uint64_t remainder,
- uint64_t error) {
- FMT_ASSERT(remainder < divisor, ""); // divisor - remainder won't overflow.
- FMT_ASSERT(error < divisor, ""); // divisor - error won't overflow.
- FMT_ASSERT(error < divisor - error, ""); // error * 2 won't overflow.
- // Round down if (remainder + error) * 2 <= divisor.
- if (remainder <= divisor - remainder && error * 2 <= divisor - remainder * 2)
- return round_direction::down;
- // Round up if (remainder - error) * 2 >= divisor.
- if (remainder >= error &&
- remainder - error >= divisor - (remainder - error)) {
- return round_direction::up;
- }
- return round_direction::unknown;
+template <typename F> inline bool operator==(basic_fp<F> x, basic_fp<F> y) {
+ return x.f == y.f && x.e == y.e;
}
-namespace digits {
-enum result {
- more, // Generate more digits.
- done, // Done generating digits.
- error // Digit generation cancelled due to an error.
-};
+// Compilers should be able to optimize this into the ror instruction.
+FMT_CONSTEXPR inline uint32_t rotr(uint32_t n, uint32_t r) noexcept {
+ r &= 31;
+ return (n >> r) | (n << (32 - r));
}
-
-struct gen_digits_handler {
- char* buf;
- int size;
- int precision;
- int exp10;
- bool fixed;
-
- FMT_CONSTEXPR digits::result on_digit(char digit, uint64_t divisor,
- uint64_t remainder, uint64_t error,
- bool integral) {
- FMT_ASSERT(remainder < divisor, "");
- buf[size++] = digit;
- if (!integral && error >= remainder) return digits::error;
- if (size < precision) return digits::more;
- if (!integral) {
- // Check if error * 2 < divisor with overflow prevention.
- // The check is not needed for the integral part because error = 1
- // and divisor > (1 << 32) there.
- if (error >= divisor || error >= divisor - error) return digits::error;
- } else {
- FMT_ASSERT(error == 1 && divisor > 2, "");
- }
- auto dir = get_round_direction(divisor, remainder, error);
- if (dir != round_direction::up)
- return dir == round_direction::down ? digits::done : digits::error;
- ++buf[size - 1];
- for (int i = size - 1; i > 0 && buf[i] > '9'; --i) {
- buf[i] = '0';
- ++buf[i - 1];
- }
- if (buf[0] > '9') {
- buf[0] = '1';
- if (fixed)
- buf[size++] = '0';
- else
- ++exp10;
- }
- return digits::done;
- }
-};
-
-// Generates output using the Grisu digit-gen algorithm.
-// error: the size of the region (lower, upper) outside of which numbers
-// definitely do not round to value (Delta in Grisu3).
-FMT_INLINE FMT_CONSTEXPR20 digits::result grisu_gen_digits(
- fp value, uint64_t error, int& exp, gen_digits_handler& handler) {
- const fp one(1ULL << -value.e, value.e);
- // The integral part of scaled value (p1 in Grisu) = value / one. It cannot be
- // zero because it contains a product of two 64-bit numbers with MSB set (due
- // to normalization) - 1, shifted right by at most 60 bits.
- auto integral = static_cast<uint32_t>(value.f >> -one.e);
- FMT_ASSERT(integral != 0, "");
- FMT_ASSERT(integral == value.f >> -one.e, "");
- // The fractional part of scaled value (p2 in Grisu) c = value % one.
- uint64_t fractional = value.f & (one.f - 1);
- exp = count_digits(integral); // kappa in Grisu.
- // Non-fixed formats require at least one digit and no precision adjustment.
- if (handler.fixed) {
- // Adjust fixed precision by exponent because it is relative to decimal
- // point.
- int precision_offset = exp + handler.exp10;
- if (precision_offset > 0 &&
- handler.precision > max_value<int>() - precision_offset) {
- FMT_THROW(format_error("number is too big"));
- }
- handler.precision += precision_offset;
- // Check if precision is satisfied just by leading zeros, e.g.
- // format("{:.2f}", 0.001) gives "0.00" without generating any digits.
- if (handler.precision <= 0) {
- if (handler.precision < 0) return digits::done;
- // Divide by 10 to prevent overflow.
- uint64_t divisor = impl_data::power_of_10_64[exp - 1] << -one.e;
- auto dir = get_round_direction(divisor, value.f / 10, error * 10);
- if (dir == round_direction::unknown) return digits::error;
- handler.buf[handler.size++] = dir == round_direction::up ? '1' : '0';
- return digits::done;
- }
- }
- // Generate digits for the integral part. This can produce up to 10 digits.
- do {
- uint32_t digit = 0;
- auto divmod_integral = [&](uint32_t divisor) {
- digit = integral / divisor;
- integral %= divisor;
- };
- // This optimization by Milo Yip reduces the number of integer divisions by
- // one per iteration.
- switch (exp) {
- case 10:
- divmod_integral(1000000000);
- break;
- case 9:
- divmod_integral(100000000);
- break;
- case 8:
- divmod_integral(10000000);
- break;
- case 7:
- divmod_integral(1000000);
- break;
- case 6:
- divmod_integral(100000);
- break;
- case 5:
- divmod_integral(10000);
- break;
- case 4:
- divmod_integral(1000);
- break;
- case 3:
- divmod_integral(100);
- break;
- case 2:
- divmod_integral(10);
- break;
- case 1:
- digit = integral;
- integral = 0;
- break;
- default:
- FMT_ASSERT(false, "invalid number of digits");
- }
- --exp;
- auto remainder = (static_cast<uint64_t>(integral) << -one.e) + fractional;
- auto result = handler.on_digit(static_cast<char>('0' + digit),
- impl_data::power_of_10_64[exp] << -one.e,
- remainder, error, true);
- if (result != digits::more) return result;
- } while (exp > 0);
- // Generate digits for the fractional part.
- for (;;) {
- fractional *= 10;
- error *= 10;
- char digit = static_cast<char>('0' + (fractional >> -one.e));
- fractional &= one.f - 1;
- --exp;
- auto result = handler.on_digit(digit, one.f, fractional, error, false);
- if (result != digits::more) return result;
- }
+FMT_CONSTEXPR inline uint64_t rotr(uint64_t n, uint32_t r) noexcept {
+ r &= 63;
+ return (n >> r) | (n << (64 - r));
}
-// A 128-bit integer type used internally,
-struct uint128_wrapper {
- uint128_wrapper() = default;
-
-#if FMT_USE_INT128
- uint128_t internal_;
-
- constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
- : internal_{static_cast<uint128_t>(low) |
- (static_cast<uint128_t>(high) << 64)} {}
-
- constexpr uint128_wrapper(uint128_t u) : internal_{u} {}
-
- constexpr uint64_t high() const FMT_NOEXCEPT {
- return uint64_t(internal_ >> 64);
- }
- constexpr uint64_t low() const FMT_NOEXCEPT { return uint64_t(internal_); }
-
- uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
- internal_ += n;
- return *this;
- }
-#else
- uint64_t high_;
- uint64_t low_;
-
- constexpr uint128_wrapper(uint64_t high, uint64_t low) FMT_NOEXCEPT
- : high_{high},
- low_{low} {}
-
- constexpr uint64_t high() const FMT_NOEXCEPT { return high_; }
- constexpr uint64_t low() const FMT_NOEXCEPT { return low_; }
-
- uint128_wrapper& operator+=(uint64_t n) FMT_NOEXCEPT {
-# if defined(_MSC_VER) && defined(_M_X64)
- unsigned char carry = _addcarry_u64(0, low_, n, &low_);
- _addcarry_u64(carry, high_, 0, &high_);
- return *this;
-# else
- uint64_t sum = low_ + n;
- high_ += (sum < low_ ? 1 : 0);
- low_ = sum;
- return *this;
-# endif
- }
-#endif
-};
-
// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
namespace dragonbox {
-// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
-inline uint128_wrapper umul128(uint64_t x, uint64_t y) FMT_NOEXCEPT {
-#if FMT_USE_INT128
- return static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
-#elif defined(_MSC_VER) && defined(_M_X64)
- uint128_wrapper result;
- result.low_ = _umul128(x, y, &result.high_);
- return result;
-#else
- const uint64_t mask = (uint64_t(1) << 32) - uint64_t(1);
-
- uint64_t a = x >> 32;
- uint64_t b = x & mask;
- uint64_t c = y >> 32;
- uint64_t d = y & mask;
-
- uint64_t ac = a * c;
- uint64_t bc = b * c;
- uint64_t ad = a * d;
- uint64_t bd = b * d;
-
- uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
-
- return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
- (intermediate << 32) + (bd & mask)};
-#endif
-}
-
-// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
-inline uint64_t umul128_upper64(uint64_t x, uint64_t y) FMT_NOEXCEPT {
-#if FMT_USE_INT128
- auto p = static_cast<uint128_t>(x) * static_cast<uint128_t>(y);
- return static_cast<uint64_t>(p >> 64);
-#elif defined(_MSC_VER) && defined(_M_X64)
- return __umulh(x, y);
-#else
- return umul128(x, y).high();
-#endif
-}
-
-// Computes upper 64 bits of multiplication of a 64-bit unsigned integer and a
-// 128-bit unsigned integer.
-inline uint64_t umul192_upper64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
- uint128_wrapper g0 = umul128(x, y.high());
- g0 += umul128_upper64(x, y.low());
- return g0.high();
-}
-
-// Computes upper 32 bits of multiplication of a 32-bit unsigned integer and a
+// Computes upper 64 bits of multiplication of a 32-bit unsigned integer and a
// 64-bit unsigned integer.
-inline uint32_t umul96_upper32(uint32_t x, uint64_t y) FMT_NOEXCEPT {
- return static_cast<uint32_t>(umul128_upper64(x, y));
+inline uint64_t umul96_upper64(uint32_t x, uint64_t y) noexcept {
+ return umul128_upper64(static_cast<uint64_t>(x) << 32, y);
}
-// Computes middle 64 bits of multiplication of a 64-bit unsigned integer and a
+// Computes lower 128 bits of multiplication of a 64-bit unsigned integer and a
// 128-bit unsigned integer.
-inline uint64_t umul192_middle64(uint64_t x, uint128_wrapper y) FMT_NOEXCEPT {
- uint64_t g01 = x * y.high();
- uint64_t g10 = umul128_upper64(x, y.low());
- return g01 + g10;
+inline uint128_fallback umul192_lower128(uint64_t x,
+ uint128_fallback y) noexcept {
+ uint64_t high = x * y.high();
+ uint128_fallback high_low = umul128(x, y.low());
+ return {high + high_low.high(), high_low.low()};
}
// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a
// 64-bit unsigned integer.
-inline uint64_t umul96_lower64(uint32_t x, uint64_t y) FMT_NOEXCEPT {
+inline uint64_t umul96_lower64(uint32_t x, uint64_t y) noexcept {
return x * y;
}
-// Computes floor(log10(pow(2, e))) for e in [-1700, 1700] using the method from
-// https://fmt.dev/papers/Grisu-Exact.pdf#page=5, section 3.4.
-inline int floor_log10_pow2(int e) FMT_NOEXCEPT {
- FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
- const int shift = 22;
- return (e * static_cast<int>(log10_2_significand >> (64 - shift))) >> shift;
-}
-
// Various fast log computations.
-inline int floor_log2_pow10(int e) FMT_NOEXCEPT {
- FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
- const uint64_t log2_10_integer_part = 3;
- const uint64_t log2_10_fractional_digits = 0x5269e12f346e2bf9;
- const int shift_amount = 19;
- return (e * static_cast<int>(
- (log2_10_integer_part << shift_amount) |
- (log2_10_fractional_digits >> (64 - shift_amount)))) >>
- shift_amount;
-}
-inline int floor_log10_pow2_minus_log10_4_over_3(int e) FMT_NOEXCEPT {
- FMT_ASSERT(e <= 1700 && e >= -1700, "too large exponent");
- const uint64_t log10_4_over_3_fractional_digits = 0x1ffbfc2bbc780375;
- const int shift_amount = 22;
- return (e * static_cast<int>(log10_2_significand >> (64 - shift_amount)) -
- static_cast<int>(log10_4_over_3_fractional_digits >>
- (64 - shift_amount))) >>
- shift_amount;
+inline int floor_log10_pow2_minus_log10_4_over_3(int e) noexcept {
+ FMT_ASSERT(e <= 2936 && e >= -2985, "too large exponent");
+ return (e * 631305 - 261663) >> 21;
}
-// Returns true iff x is divisible by pow(2, exp).
-inline bool divisible_by_power_of_2(uint32_t x, int exp) FMT_NOEXCEPT {
- FMT_ASSERT(exp >= 1, "");
- FMT_ASSERT(x != 0, "");
-#ifdef FMT_BUILTIN_CTZ
- return FMT_BUILTIN_CTZ(x) >= exp;
-#else
- return exp < num_bits<uint32_t>() && x == ((x >> exp) << exp);
-#endif
-}
-inline bool divisible_by_power_of_2(uint64_t x, int exp) FMT_NOEXCEPT {
- FMT_ASSERT(exp >= 1, "");
- FMT_ASSERT(x != 0, "");
-#ifdef FMT_BUILTIN_CTZLL
- return FMT_BUILTIN_CTZLL(x) >= exp;
-#else
- return exp < num_bits<uint64_t>() && x == ((x >> exp) << exp);
-#endif
-}
-
-// Table entry type for divisibility test.
-template <typename T> struct divtest_table_entry {
- T mod_inv;
- T max_quotient;
-};
-
-// Returns true iff x is divisible by pow(5, exp).
-inline bool divisible_by_power_of_5(uint32_t x, int exp) FMT_NOEXCEPT {
- FMT_ASSERT(exp <= 10, "too large exponent");
- static constexpr const divtest_table_entry<uint32_t> divtest_table[] = {
- {0x00000001, 0xffffffff}, {0xcccccccd, 0x33333333},
- {0xc28f5c29, 0x0a3d70a3}, {0x26e978d5, 0x020c49ba},
- {0x3afb7e91, 0x0068db8b}, {0x0bcbe61d, 0x0014f8b5},
- {0x68c26139, 0x000431bd}, {0xae8d46a5, 0x0000d6bf},
- {0x22e90e21, 0x00002af3}, {0x3a2e9c6d, 0x00000897},
- {0x3ed61f49, 0x000001b7}};
- return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
-}
-inline bool divisible_by_power_of_5(uint64_t x, int exp) FMT_NOEXCEPT {
- FMT_ASSERT(exp <= 23, "too large exponent");
- static constexpr const divtest_table_entry<uint64_t> divtest_table[] = {
- {0x0000000000000001, 0xffffffffffffffff},
- {0xcccccccccccccccd, 0x3333333333333333},
- {0x8f5c28f5c28f5c29, 0x0a3d70a3d70a3d70},
- {0x1cac083126e978d5, 0x020c49ba5e353f7c},
- {0xd288ce703afb7e91, 0x0068db8bac710cb2},
- {0x5d4e8fb00bcbe61d, 0x0014f8b588e368f0},
- {0x790fb65668c26139, 0x000431bde82d7b63},
- {0xe5032477ae8d46a5, 0x0000d6bf94d5e57a},
- {0xc767074b22e90e21, 0x00002af31dc46118},
- {0x8e47ce423a2e9c6d, 0x0000089705f4136b},
- {0x4fa7f60d3ed61f49, 0x000001b7cdfd9d7b},
- {0x0fee64690c913975, 0x00000057f5ff85e5},
- {0x3662e0e1cf503eb1, 0x000000119799812d},
- {0xa47a2cf9f6433fbd, 0x0000000384b84d09},
- {0x54186f653140a659, 0x00000000b424dc35},
- {0x7738164770402145, 0x0000000024075f3d},
- {0xe4a4d1417cd9a041, 0x000000000734aca5},
- {0xc75429d9e5c5200d, 0x000000000170ef54},
- {0xc1773b91fac10669, 0x000000000049c977},
- {0x26b172506559ce15, 0x00000000000ec1e4},
- {0xd489e3a9addec2d1, 0x000000000002f394},
- {0x90e860bb892c8d5d, 0x000000000000971d},
- {0x502e79bf1b6f4f79, 0x0000000000001e39},
- {0xdcd618596be30fe5, 0x000000000000060b}};
- return x * divtest_table[exp].mod_inv <= divtest_table[exp].max_quotient;
-}
+FMT_INLINE_VARIABLE constexpr struct {
+ uint32_t divisor;
+ int shift_amount;
+} div_small_pow10_infos[] = {{10, 16}, {100, 16}};
-// Replaces n by floor(n / pow(5, N)) returning true if and only if n is
-// divisible by pow(5, N).
-// Precondition: n <= 2 * pow(5, N + 1).
+// Replaces n by floor(n / pow(10, N)) returning true if and only if n is
+// divisible by pow(10, N).
+// Precondition: n <= pow(10, N + 1).
template <int N>
-bool check_divisibility_and_divide_by_pow5(uint32_t& n) FMT_NOEXCEPT {
- static constexpr struct {
- uint32_t magic_number;
- int bits_for_comparison;
- uint32_t threshold;
- int shift_amount;
- } infos[] = {{0xcccd, 16, 0x3333, 18}, {0xa429, 8, 0x0a, 20}};
- constexpr auto info = infos[N - 1];
- n *= info.magic_number;
- const uint32_t comparison_mask = (1u << info.bits_for_comparison) - 1;
- bool result = (n & comparison_mask) <= info.threshold;
+bool check_divisibility_and_divide_by_pow10(uint32_t& n) noexcept {
+ // The numbers below are chosen such that:
+ // 1. floor(n/d) = floor(nm / 2^k) where d=10 or d=100,
+ // 2. nm mod 2^k < m if and only if n is divisible by d,
+ // where m is magic_number, k is shift_amount
+ // and d is divisor.
+ //
+ // Item 1 is a common technique of replacing division by a constant with
+ // multiplication, see e.g. "Division by Invariant Integers Using
+ // Multiplication" by Granlund and Montgomery (1994). magic_number (m) is set
+ // to ceil(2^k/d) for large enough k.
+ // The idea for item 2 originates from Schubfach.
+ constexpr auto info = div_small_pow10_infos[N - 1];
+ FMT_ASSERT(n <= info.divisor * 10, "n is too large");
+ constexpr uint32_t magic_number =
+ (1u << info.shift_amount) / info.divisor + 1;
+ n *= magic_number;
+ const uint32_t comparison_mask = (1u << info.shift_amount) - 1;
+ bool result = (n & comparison_mask) < magic_number;
n >>= info.shift_amount;
return result;
}
// Computes floor(n / pow(10, N)) for small n and N.
// Precondition: n <= pow(10, N + 1).
-template <int N> uint32_t small_division_by_pow10(uint32_t n) FMT_NOEXCEPT {
- static constexpr struct {
- uint32_t magic_number;
- int shift_amount;
- uint32_t divisor_times_10;
- } infos[] = {{0xcccd, 19, 100}, {0xa3d8, 22, 1000}};
- constexpr auto info = infos[N - 1];
- FMT_ASSERT(n <= info.divisor_times_10, "n is too large");
- return n * info.magic_number >> info.shift_amount;
+template <int N> uint32_t small_division_by_pow10(uint32_t n) noexcept {
+ constexpr auto info = div_small_pow10_infos[N - 1];
+ FMT_ASSERT(n <= info.divisor * 10, "n is too large");
+ constexpr uint32_t magic_number =
+ (1u << info.shift_amount) / info.divisor + 1;
+ return (n * magic_number) >> info.shift_amount;
}
// Computes floor(n / 10^(kappa + 1)) (float)
-inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) FMT_NOEXCEPT {
- return n / float_info<float>::big_divisor;
+inline uint32_t divide_by_10_to_kappa_plus_1(uint32_t n) noexcept {
+ // 1374389535 = ceil(2^37/100)
+ return static_cast<uint32_t>((static_cast<uint64_t>(n) * 1374389535) >> 37);
}
// Computes floor(n / 10^(kappa + 1)) (double)
-inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) FMT_NOEXCEPT {
- return umul128_upper64(n, 0x83126e978d4fdf3c) >> 9;
+inline uint64_t divide_by_10_to_kappa_plus_1(uint64_t n) noexcept {
+ // 2361183241434822607 = ceil(2^(64+7)/1000)
+ return umul128_upper64(n, 2361183241434822607ull) >> 7;
}
// Various subroutines using pow10 cache
-template <class T> struct cache_accessor;
+template <typename T> struct cache_accessor;
template <> struct cache_accessor<float> {
using carrier_uint = float_info<float>::carrier_uint;
using cache_entry_type = uint64_t;
- static uint64_t get_cached_power(int k) FMT_NOEXCEPT {
+ static uint64_t get_cached_power(int k) noexcept {
FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
"k is out of range");
static constexpr const uint64_t pow10_significands[] = {
0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000,
0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000,
0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0,
- 0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940984,
- 0xa18f07d736b90be5, 0xc9f2c9cd04674ede, 0xfc6f7c4045812296,
- 0x9dc5ada82b70b59d, 0xc5371912364ce305, 0xf684df56c3e01bc6,
- 0x9a130b963a6c115c, 0xc097ce7bc90715b3, 0xf0bdc21abb48db20,
- 0x96769950b50d88f4, 0xbc143fa4e250eb31, 0xeb194f8e1ae525fd,
- 0x92efd1b8d0cf37be, 0xb7abc627050305ad, 0xe596b7b0c643c719,
- 0x8f7e32ce7bea5c6f, 0xb35dbf821ae4f38b, 0xe0352f62a19e306e};
+ 0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940985,
+ 0xa18f07d736b90be6, 0xc9f2c9cd04674edf, 0xfc6f7c4045812297,
+ 0x9dc5ada82b70b59e, 0xc5371912364ce306, 0xf684df56c3e01bc7,
+ 0x9a130b963a6c115d, 0xc097ce7bc90715b4, 0xf0bdc21abb48db21,
+ 0x96769950b50d88f5, 0xbc143fa4e250eb32, 0xeb194f8e1ae525fe,
+ 0x92efd1b8d0cf37bf, 0xb7abc627050305ae, 0xe596b7b0c643c71a,
+ 0x8f7e32ce7bea5c70, 0xb35dbf821ae4f38c, 0xe0352f62a19e306f};
return pow10_significands[k - float_info<float>::min_k];
}
- static carrier_uint compute_mul(carrier_uint u,
- const cache_entry_type& cache) FMT_NOEXCEPT {
- return umul96_upper32(u, cache);
+ struct compute_mul_result {
+ carrier_uint result;
+ bool is_integer;
+ };
+ struct compute_mul_parity_result {
+ bool parity;
+ bool is_integer;
+ };
+
+ static compute_mul_result compute_mul(
+ carrier_uint u, const cache_entry_type& cache) noexcept {
+ auto r = umul96_upper64(u, cache);
+ return {static_cast<carrier_uint>(r >> 32),
+ static_cast<carrier_uint>(r) == 0};
}
static uint32_t compute_delta(const cache_entry_type& cache,
- int beta_minus_1) FMT_NOEXCEPT {
- return static_cast<uint32_t>(cache >> (64 - 1 - beta_minus_1));
+ int beta) noexcept {
+ return static_cast<uint32_t>(cache >> (64 - 1 - beta));
}
- static bool compute_mul_parity(carrier_uint two_f,
- const cache_entry_type& cache,
- int beta_minus_1) FMT_NOEXCEPT {
- FMT_ASSERT(beta_minus_1 >= 1, "");
- FMT_ASSERT(beta_minus_1 < 64, "");
+ static compute_mul_parity_result compute_mul_parity(
+ carrier_uint two_f, const cache_entry_type& cache, int beta) noexcept {
+ FMT_ASSERT(beta >= 1, "");
+ FMT_ASSERT(beta < 64, "");
- return ((umul96_lower64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
+ auto r = umul96_lower64(two_f, cache);
+ return {((r >> (64 - beta)) & 1) != 0,
+ static_cast<uint32_t>(r >> (32 - beta)) == 0};
}
static carrier_uint compute_left_endpoint_for_shorter_interval_case(
- const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ const cache_entry_type& cache, int beta) noexcept {
return static_cast<carrier_uint>(
- (cache - (cache >> (float_info<float>::significand_bits + 2))) >>
- (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
+ (cache - (cache >> (num_significand_bits<float>() + 2))) >>
+ (64 - num_significand_bits<float>() - 1 - beta));
}
static carrier_uint compute_right_endpoint_for_shorter_interval_case(
- const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ const cache_entry_type& cache, int beta) noexcept {
return static_cast<carrier_uint>(
- (cache + (cache >> (float_info<float>::significand_bits + 1))) >>
- (64 - float_info<float>::significand_bits - 1 - beta_minus_1));
+ (cache + (cache >> (num_significand_bits<float>() + 1))) >>
+ (64 - num_significand_bits<float>() - 1 - beta));
}
static carrier_uint compute_round_up_for_shorter_interval_case(
- const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ const cache_entry_type& cache, int beta) noexcept {
return (static_cast<carrier_uint>(
- cache >>
- (64 - float_info<float>::significand_bits - 2 - beta_minus_1)) +
+ cache >> (64 - num_significand_bits<float>() - 2 - beta)) +
1) /
2;
}
template <> struct cache_accessor<double> {
using carrier_uint = float_info<double>::carrier_uint;
- using cache_entry_type = uint128_wrapper;
+ using cache_entry_type = uint128_fallback;
- static uint128_wrapper get_cached_power(int k) FMT_NOEXCEPT {
+ static uint128_fallback get_cached_power(int k) noexcept {
FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
"k is out of range");
- static constexpr const uint128_wrapper pow10_significands[] = {
+ static constexpr const uint128_fallback pow10_significands[] = {
#if FMT_USE_FULL_CACHE_DRAGONBOX
{0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
{0x9faacf3df73609b1, 0x77b191618c54e9ad},
{0x85a36366eb71f041, 0x47a6da2b7f864750},
{0xa70c3c40a64e6c51, 0x999090b65f67d924},
{0xd0cf4b50cfe20765, 0xfff4b4e3f741cf6d},
- {0x82818f1281ed449f, 0xbff8f10e7a8921a4},
- {0xa321f2d7226895c7, 0xaff72d52192b6a0d},
- {0xcbea6f8ceb02bb39, 0x9bf4f8a69f764490},
- {0xfee50b7025c36a08, 0x02f236d04753d5b4},
- {0x9f4f2726179a2245, 0x01d762422c946590},
- {0xc722f0ef9d80aad6, 0x424d3ad2b7b97ef5},
- {0xf8ebad2b84e0d58b, 0xd2e0898765a7deb2},
- {0x9b934c3b330c8577, 0x63cc55f49f88eb2f},
- {0xc2781f49ffcfa6d5, 0x3cbf6b71c76b25fb},
- {0xf316271c7fc3908a, 0x8bef464e3945ef7a},
- {0x97edd871cfda3a56, 0x97758bf0e3cbb5ac},
- {0xbde94e8e43d0c8ec, 0x3d52eeed1cbea317},
- {0xed63a231d4c4fb27, 0x4ca7aaa863ee4bdd},
- {0x945e455f24fb1cf8, 0x8fe8caa93e74ef6a},
- {0xb975d6b6ee39e436, 0xb3e2fd538e122b44},
- {0xe7d34c64a9c85d44, 0x60dbbca87196b616},
- {0x90e40fbeea1d3a4a, 0xbc8955e946fe31cd},
- {0xb51d13aea4a488dd, 0x6babab6398bdbe41},
- {0xe264589a4dcdab14, 0xc696963c7eed2dd1},
- {0x8d7eb76070a08aec, 0xfc1e1de5cf543ca2},
- {0xb0de65388cc8ada8, 0x3b25a55f43294bcb},
- {0xdd15fe86affad912, 0x49ef0eb713f39ebe},
- {0x8a2dbf142dfcc7ab, 0x6e3569326c784337},
- {0xacb92ed9397bf996, 0x49c2c37f07965404},
- {0xd7e77a8f87daf7fb, 0xdc33745ec97be906},
- {0x86f0ac99b4e8dafd, 0x69a028bb3ded71a3},
- {0xa8acd7c0222311bc, 0xc40832ea0d68ce0c},
- {0xd2d80db02aabd62b, 0xf50a3fa490c30190},
- {0x83c7088e1aab65db, 0x792667c6da79e0fa},
- {0xa4b8cab1a1563f52, 0x577001b891185938},
- {0xcde6fd5e09abcf26, 0xed4c0226b55e6f86},
- {0x80b05e5ac60b6178, 0x544f8158315b05b4},
- {0xa0dc75f1778e39d6, 0x696361ae3db1c721},
- {0xc913936dd571c84c, 0x03bc3a19cd1e38e9},
- {0xfb5878494ace3a5f, 0x04ab48a04065c723},
- {0x9d174b2dcec0e47b, 0x62eb0d64283f9c76},
- {0xc45d1df942711d9a, 0x3ba5d0bd324f8394},
- {0xf5746577930d6500, 0xca8f44ec7ee36479},
- {0x9968bf6abbe85f20, 0x7e998b13cf4e1ecb},
- {0xbfc2ef456ae276e8, 0x9e3fedd8c321a67e},
- {0xefb3ab16c59b14a2, 0xc5cfe94ef3ea101e},
- {0x95d04aee3b80ece5, 0xbba1f1d158724a12},
- {0xbb445da9ca61281f, 0x2a8a6e45ae8edc97},
- {0xea1575143cf97226, 0xf52d09d71a3293bd},
- {0x924d692ca61be758, 0x593c2626705f9c56},
- {0xb6e0c377cfa2e12e, 0x6f8b2fb00c77836c},
- {0xe498f455c38b997a, 0x0b6dfb9c0f956447},
- {0x8edf98b59a373fec, 0x4724bd4189bd5eac},
- {0xb2977ee300c50fe7, 0x58edec91ec2cb657},
- {0xdf3d5e9bc0f653e1, 0x2f2967b66737e3ed},
- {0x8b865b215899f46c, 0xbd79e0d20082ee74},
- {0xae67f1e9aec07187, 0xecd8590680a3aa11},
- {0xda01ee641a708de9, 0xe80e6f4820cc9495},
- {0x884134fe908658b2, 0x3109058d147fdcdd},
- {0xaa51823e34a7eede, 0xbd4b46f0599fd415},
- {0xd4e5e2cdc1d1ea96, 0x6c9e18ac7007c91a},
- {0x850fadc09923329e, 0x03e2cf6bc604ddb0},
- {0xa6539930bf6bff45, 0x84db8346b786151c},
- {0xcfe87f7cef46ff16, 0xe612641865679a63},
- {0x81f14fae158c5f6e, 0x4fcb7e8f3f60c07e},
- {0xa26da3999aef7749, 0xe3be5e330f38f09d},
- {0xcb090c8001ab551c, 0x5cadf5bfd3072cc5},
- {0xfdcb4fa002162a63, 0x73d9732fc7c8f7f6},
- {0x9e9f11c4014dda7e, 0x2867e7fddcdd9afa},
- {0xc646d63501a1511d, 0xb281e1fd541501b8},
- {0xf7d88bc24209a565, 0x1f225a7ca91a4226},
- {0x9ae757596946075f, 0x3375788de9b06958},
- {0xc1a12d2fc3978937, 0x0052d6b1641c83ae},
- {0xf209787bb47d6b84, 0xc0678c5dbd23a49a},
- {0x9745eb4d50ce6332, 0xf840b7ba963646e0},
- {0xbd176620a501fbff, 0xb650e5a93bc3d898},
- {0xec5d3fa8ce427aff, 0xa3e51f138ab4cebe},
- {0x93ba47c980e98cdf, 0xc66f336c36b10137},
- {0xb8a8d9bbe123f017, 0xb80b0047445d4184},
- {0xe6d3102ad96cec1d, 0xa60dc059157491e5},
- {0x9043ea1ac7e41392, 0x87c89837ad68db2f},
- {0xb454e4a179dd1877, 0x29babe4598c311fb},
- {0xe16a1dc9d8545e94, 0xf4296dd6fef3d67a},
- {0x8ce2529e2734bb1d, 0x1899e4a65f58660c},
- {0xb01ae745b101e9e4, 0x5ec05dcff72e7f8f},
- {0xdc21a1171d42645d, 0x76707543f4fa1f73},
- {0x899504ae72497eba, 0x6a06494a791c53a8},
- {0xabfa45da0edbde69, 0x0487db9d17636892},
- {0xd6f8d7509292d603, 0x45a9d2845d3c42b6},
- {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b2},
- {0xa7f26836f282b732, 0x8e6cac7768d7141e},
- {0xd1ef0244af2364ff, 0x3207d795430cd926},
- {0x8335616aed761f1f, 0x7f44e6bd49e807b8},
- {0xa402b9c5a8d3a6e7, 0x5f16206c9c6209a6},
- {0xcd036837130890a1, 0x36dba887c37a8c0f},
- {0x802221226be55a64, 0xc2494954da2c9789},
- {0xa02aa96b06deb0fd, 0xf2db9baa10b7bd6c},
- {0xc83553c5c8965d3d, 0x6f92829494e5acc7},
- {0xfa42a8b73abbf48c, 0xcb772339ba1f17f9},
- {0x9c69a97284b578d7, 0xff2a760414536efb},
- {0xc38413cf25e2d70d, 0xfef5138519684aba},
- {0xf46518c2ef5b8cd1, 0x7eb258665fc25d69},
- {0x98bf2f79d5993802, 0xef2f773ffbd97a61},
- {0xbeeefb584aff8603, 0xaafb550ffacfd8fa},
- {0xeeaaba2e5dbf6784, 0x95ba2a53f983cf38},
- {0x952ab45cfa97a0b2, 0xdd945a747bf26183},
- {0xba756174393d88df, 0x94f971119aeef9e4},
- {0xe912b9d1478ceb17, 0x7a37cd5601aab85d},
- {0x91abb422ccb812ee, 0xac62e055c10ab33a},
- {0xb616a12b7fe617aa, 0x577b986b314d6009},
- {0xe39c49765fdf9d94, 0xed5a7e85fda0b80b},
- {0x8e41ade9fbebc27d, 0x14588f13be847307},
- {0xb1d219647ae6b31c, 0x596eb2d8ae258fc8},
- {0xde469fbd99a05fe3, 0x6fca5f8ed9aef3bb},
- {0x8aec23d680043bee, 0x25de7bb9480d5854},
- {0xada72ccc20054ae9, 0xaf561aa79a10ae6a},
- {0xd910f7ff28069da4, 0x1b2ba1518094da04},
- {0x87aa9aff79042286, 0x90fb44d2f05d0842},
- {0xa99541bf57452b28, 0x353a1607ac744a53},
- {0xd3fa922f2d1675f2, 0x42889b8997915ce8},
- {0x847c9b5d7c2e09b7, 0x69956135febada11},
- {0xa59bc234db398c25, 0x43fab9837e699095},
- {0xcf02b2c21207ef2e, 0x94f967e45e03f4bb},
- {0x8161afb94b44f57d, 0x1d1be0eebac278f5},
- {0xa1ba1ba79e1632dc, 0x6462d92a69731732},
- {0xca28a291859bbf93, 0x7d7b8f7503cfdcfe},
- {0xfcb2cb35e702af78, 0x5cda735244c3d43e},
- {0x9defbf01b061adab, 0x3a0888136afa64a7},
- {0xc56baec21c7a1916, 0x088aaa1845b8fdd0},
- {0xf6c69a72a3989f5b, 0x8aad549e57273d45},
- {0x9a3c2087a63f6399, 0x36ac54e2f678864b},
- {0xc0cb28a98fcf3c7f, 0x84576a1bb416a7dd},
- {0xf0fdf2d3f3c30b9f, 0x656d44a2a11c51d5},
- {0x969eb7c47859e743, 0x9f644ae5a4b1b325},
- {0xbc4665b596706114, 0x873d5d9f0dde1fee},
- {0xeb57ff22fc0c7959, 0xa90cb506d155a7ea},
- {0x9316ff75dd87cbd8, 0x09a7f12442d588f2},
- {0xb7dcbf5354e9bece, 0x0c11ed6d538aeb2f},
- {0xe5d3ef282a242e81, 0x8f1668c8a86da5fa},
- {0x8fa475791a569d10, 0xf96e017d694487bc},
- {0xb38d92d760ec4455, 0x37c981dcc395a9ac},
- {0xe070f78d3927556a, 0x85bbe253f47b1417},
- {0x8c469ab843b89562, 0x93956d7478ccec8e},
- {0xaf58416654a6babb, 0x387ac8d1970027b2},
- {0xdb2e51bfe9d0696a, 0x06997b05fcc0319e},
- {0x88fcf317f22241e2, 0x441fece3bdf81f03},
- {0xab3c2fddeeaad25a, 0xd527e81cad7626c3},
- {0xd60b3bd56a5586f1, 0x8a71e223d8d3b074},
- {0x85c7056562757456, 0xf6872d5667844e49},
- {0xa738c6bebb12d16c, 0xb428f8ac016561db},
- {0xd106f86e69d785c7, 0xe13336d701beba52},
- {0x82a45b450226b39c, 0xecc0024661173473},
- {0xa34d721642b06084, 0x27f002d7f95d0190},
- {0xcc20ce9bd35c78a5, 0x31ec038df7b441f4},
- {0xff290242c83396ce, 0x7e67047175a15271},
- {0x9f79a169bd203e41, 0x0f0062c6e984d386},
- {0xc75809c42c684dd1, 0x52c07b78a3e60868},
- {0xf92e0c3537826145, 0xa7709a56ccdf8a82},
- {0x9bbcc7a142b17ccb, 0x88a66076400bb691},
- {0xc2abf989935ddbfe, 0x6acff893d00ea435},
- {0xf356f7ebf83552fe, 0x0583f6b8c4124d43},
- {0x98165af37b2153de, 0xc3727a337a8b704a},
- {0xbe1bf1b059e9a8d6, 0x744f18c0592e4c5c},
- {0xeda2ee1c7064130c, 0x1162def06f79df73},
- {0x9485d4d1c63e8be7, 0x8addcb5645ac2ba8},
- {0xb9a74a0637ce2ee1, 0x6d953e2bd7173692},
- {0xe8111c87c5c1ba99, 0xc8fa8db6ccdd0437},
- {0x910ab1d4db9914a0, 0x1d9c9892400a22a2},
- {0xb54d5e4a127f59c8, 0x2503beb6d00cab4b},
- {0xe2a0b5dc971f303a, 0x2e44ae64840fd61d},
- {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},
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- { 0xf70867153aa2db38,
- 0xb8cbee4fc66d1ea7 }
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+ {0xa9c2794ae3a3c69a, 0xb2eb3875504ddb23},
+ {0xd433179d9c8cb841, 0x5fa60692a46151ec},
+ {0x849feec281d7f328, 0xdbc7c41ba6bcd334},
+ {0xa5c7ea73224deff3, 0x12b9b522906c0801},
+ {0xcf39e50feae16bef, 0xd768226b34870a01},
+ {0x81842f29f2cce375, 0xe6a1158300d46641},
+ {0xa1e53af46f801c53, 0x60495ae3c1097fd1},
+ {0xca5e89b18b602368, 0x385bb19cb14bdfc5},
+ {0xfcf62c1dee382c42, 0x46729e03dd9ed7b6},
+ {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d2},
+ {0xc5a05277621be293, 0xc7098b7305241886},
+ {0xf70867153aa2db38, 0xb8cbee4fc66d1ea8},
+ {0x9a65406d44a5c903, 0x737f74f1dc043329},
+ {0xc0fe908895cf3b44, 0x505f522e53053ff3},
+ {0xf13e34aabb430a15, 0x647726b9e7c68ff0},
+ {0x96c6e0eab509e64d, 0x5eca783430dc19f6},
+ {0xbc789925624c5fe0, 0xb67d16413d132073},
+ {0xeb96bf6ebadf77d8, 0xe41c5bd18c57e890},
+ {0x933e37a534cbaae7, 0x8e91b962f7b6f15a},
+ {0xb80dc58e81fe95a1, 0x723627bbb5a4adb1},
+ {0xe61136f2227e3b09, 0xcec3b1aaa30dd91d},
+ {0x8fcac257558ee4e6, 0x213a4f0aa5e8a7b2},
+ {0xb3bd72ed2af29e1f, 0xa988e2cd4f62d19e},
+ {0xe0accfa875af45a7, 0x93eb1b80a33b8606},
+ {0x8c6c01c9498d8b88, 0xbc72f130660533c4},
+ {0xaf87023b9bf0ee6a, 0xeb8fad7c7f8680b5},
+ { 0xdb68c2ca82ed2a05,
+ 0xa67398db9f6820e2 }
#else
{0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
{0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
{0xf1c90080baf72cb1, 0x5324c68b12dd6339},
{0xc350000000000000, 0x0000000000000000},
{0x9dc5ada82b70b59d, 0xf020000000000000},
- {0xfee50b7025c36a08, 0x02f236d04753d5b4},
- {0xcde6fd5e09abcf26, 0xed4c0226b55e6f86},
- {0xa6539930bf6bff45, 0x84db8346b786151c},
- {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b2},
- {0xd910f7ff28069da4, 0x1b2ba1518094da04},
- {0xaf58416654a6babb, 0x387ac8d1970027b2},
- {0x8da471a9de737e24, 0x5ceaecfed289e5d2},
- {0xe4d5e82392a40515, 0x0fabaf3feaa5334a},
- {0xb8da1662e7b00a17, 0x3d6a751f3b936243},
- { 0x95527a5202df0ccb,
- 0x0f37801e0c43ebc8 }
+ {0xfee50b7025c36a08, 0x02f236d04753d5b5},
+ {0xcde6fd5e09abcf26, 0xed4c0226b55e6f87},
+ {0xa6539930bf6bff45, 0x84db8346b786151d},
+ {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b3},
+ {0xd910f7ff28069da4, 0x1b2ba1518094da05},
+ {0xaf58416654a6babb, 0x387ac8d1970027b3},
+ {0x8da471a9de737e24, 0x5ceaecfed289e5d3},
+ {0xe4d5e82392a40515, 0x0fabaf3feaa5334b},
+ {0xb8da1662e7b00a17, 0x3d6a751f3b936244},
+ {0x95527a5202df0ccb, 0x0f37801e0c43ebc9},
+ {0xf13e34aabb430a15, 0x647726b9e7c68ff0}
#endif
};
0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
- static constexpr const uint32_t pow10_recovery_errors[] = {
- 0x50001400, 0x54044100, 0x54014555, 0x55954415, 0x54115555, 0x00000001,
- 0x50000000, 0x00104000, 0x54010004, 0x05004001, 0x55555544, 0x41545555,
- 0x54040551, 0x15445545, 0x51555514, 0x10000015, 0x00101100, 0x01100015,
- 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x04450514, 0x45414110,
- 0x55555145, 0x50544050, 0x15040155, 0x11054140, 0x50111514, 0x11451454,
- 0x00400541, 0x00000000, 0x55555450, 0x10056551, 0x10054011, 0x55551014,
- 0x69514555, 0x05151109, 0x00155555};
-
static const int compression_ratio = 27;
// Compute base index.
int offset = k - kb;
// Get base cache.
- uint128_wrapper base_cache = pow10_significands[cache_index];
+ uint128_fallback base_cache = pow10_significands[cache_index];
if (offset == 0) return base_cache;
// Compute the required amount of bit-shift.
// Try to recover the real cache.
uint64_t pow5 = powers_of_5_64[offset];
- uint128_wrapper recovered_cache = umul128(base_cache.high(), pow5);
- uint128_wrapper middle_low =
- umul128(base_cache.low() - (kb < 0 ? 1u : 0u), pow5);
+ uint128_fallback recovered_cache = umul128(base_cache.high(), pow5);
+ uint128_fallback middle_low = umul128(base_cache.low(), pow5);
recovered_cache += middle_low.high();
uint64_t middle_to_low = recovered_cache.low() << (64 - alpha);
recovered_cache =
- uint128_wrapper{(recovered_cache.low() >> alpha) | high_to_middle,
- ((middle_low.low() >> alpha) | middle_to_low)};
-
- if (kb < 0) recovered_cache += 1;
-
- // Get error.
- int error_idx = (k - float_info<double>::min_k) / 16;
- uint32_t error = (pow10_recovery_errors[error_idx] >>
- ((k - float_info<double>::min_k) % 16) * 2) &
- 0x3;
-
- // Add the error back.
- FMT_ASSERT(recovered_cache.low() + error >= recovered_cache.low(), "");
- return {recovered_cache.high(), recovered_cache.low() + error};
+ uint128_fallback{(recovered_cache.low() >> alpha) | high_to_middle,
+ ((middle_low.low() >> alpha) | middle_to_low)};
+ FMT_ASSERT(recovered_cache.low() + 1 != 0, "");
+ return {recovered_cache.high(), recovered_cache.low() + 1};
#endif
}
- static carrier_uint compute_mul(carrier_uint u,
- const cache_entry_type& cache) FMT_NOEXCEPT {
- return umul192_upper64(u, cache);
+ struct compute_mul_result {
+ carrier_uint result;
+ bool is_integer;
+ };
+ struct compute_mul_parity_result {
+ bool parity;
+ bool is_integer;
+ };
+
+ static compute_mul_result compute_mul(
+ carrier_uint u, const cache_entry_type& cache) noexcept {
+ auto r = umul192_upper128(u, cache);
+ return {r.high(), r.low() == 0};
}
static uint32_t compute_delta(cache_entry_type const& cache,
- int beta_minus_1) FMT_NOEXCEPT {
- return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta_minus_1));
+ int beta) noexcept {
+ return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta));
}
- static bool compute_mul_parity(carrier_uint two_f,
- const cache_entry_type& cache,
- int beta_minus_1) FMT_NOEXCEPT {
- FMT_ASSERT(beta_minus_1 >= 1, "");
- FMT_ASSERT(beta_minus_1 < 64, "");
+ static compute_mul_parity_result compute_mul_parity(
+ carrier_uint two_f, const cache_entry_type& cache, int beta) noexcept {
+ FMT_ASSERT(beta >= 1, "");
+ FMT_ASSERT(beta < 64, "");
- return ((umul192_middle64(two_f, cache) >> (64 - beta_minus_1)) & 1) != 0;
+ auto r = umul192_lower128(two_f, cache);
+ return {((r.high() >> (64 - beta)) & 1) != 0,
+ ((r.high() << beta) | (r.low() >> (64 - beta))) == 0};
}
static carrier_uint compute_left_endpoint_for_shorter_interval_case(
- const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ const cache_entry_type& cache, int beta) noexcept {
return (cache.high() -
- (cache.high() >> (float_info<double>::significand_bits + 2))) >>
- (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
+ (cache.high() >> (num_significand_bits<double>() + 2))) >>
+ (64 - num_significand_bits<double>() - 1 - beta);
}
static carrier_uint compute_right_endpoint_for_shorter_interval_case(
- const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
+ const cache_entry_type& cache, int beta) noexcept {
return (cache.high() +
- (cache.high() >> (float_info<double>::significand_bits + 1))) >>
- (64 - float_info<double>::significand_bits - 1 - beta_minus_1);
+ (cache.high() >> (num_significand_bits<double>() + 1))) >>
+ (64 - num_significand_bits<double>() - 1 - beta);
}
static carrier_uint compute_round_up_for_shorter_interval_case(
- const cache_entry_type& cache, int beta_minus_1) FMT_NOEXCEPT {
- return ((cache.high() >>
- (64 - float_info<double>::significand_bits - 2 - beta_minus_1)) +
+ const cache_entry_type& cache, int beta) noexcept {
+ return ((cache.high() >> (64 - num_significand_bits<double>() - 2 - beta)) +
1) /
2;
}
};
-// Various integer checks
-template <class T>
-bool is_left_endpoint_integer_shorter_interval(int exponent) FMT_NOEXCEPT {
- return exponent >=
- float_info<
- T>::case_shorter_interval_left_endpoint_lower_threshold &&
- exponent <=
- float_info<T>::case_shorter_interval_left_endpoint_upper_threshold;
-}
-template <class T>
-bool is_endpoint_integer(typename float_info<T>::carrier_uint two_f,
- int exponent, int minus_k) FMT_NOEXCEPT {
- if (exponent < float_info<T>::case_fc_pm_half_lower_threshold) return false;
- // For k >= 0.
- if (exponent <= float_info<T>::case_fc_pm_half_upper_threshold) return true;
- // For k < 0.
- if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
- return divisible_by_power_of_5(two_f, minus_k);
+FMT_FUNC uint128_fallback get_cached_power(int k) noexcept {
+ return cache_accessor<double>::get_cached_power(k);
}
-template <class T>
-bool is_center_integer(typename float_info<T>::carrier_uint two_f, int exponent,
- int minus_k) FMT_NOEXCEPT {
- // Exponent for 5 is negative.
- if (exponent > float_info<T>::divisibility_check_by_5_threshold) return false;
- if (exponent > float_info<T>::case_fc_upper_threshold)
- return divisible_by_power_of_5(two_f, minus_k);
- // Both exponents are nonnegative.
- if (exponent >= float_info<T>::case_fc_lower_threshold) return true;
- // Exponent for 2 is negative.
- return divisible_by_power_of_2(two_f, minus_k - exponent + 1);
+// Various integer checks
+template <typename T>
+bool is_left_endpoint_integer_shorter_interval(int exponent) noexcept {
+ const int case_shorter_interval_left_endpoint_lower_threshold = 2;
+ const int case_shorter_interval_left_endpoint_upper_threshold = 3;
+ return exponent >= case_shorter_interval_left_endpoint_lower_threshold &&
+ exponent <= case_shorter_interval_left_endpoint_upper_threshold;
}
// Remove trailing zeros from n and return the number of zeros removed (float)
-FMT_INLINE int remove_trailing_zeros(uint32_t& n) FMT_NOEXCEPT {
-#ifdef FMT_BUILTIN_CTZ
- int t = FMT_BUILTIN_CTZ(n);
-#else
- int t = ctz(n);
-#endif
- if (t > float_info<float>::max_trailing_zeros)
- t = float_info<float>::max_trailing_zeros;
-
- const uint32_t mod_inv1 = 0xcccccccd;
- const uint32_t max_quotient1 = 0x33333333;
- const uint32_t mod_inv2 = 0xc28f5c29;
- const uint32_t max_quotient2 = 0x0a3d70a3;
-
- 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;
+FMT_INLINE int remove_trailing_zeros(uint32_t& n, int s = 0) noexcept {
+ FMT_ASSERT(n != 0, "");
+ // Modular inverse of 5 (mod 2^32): (mod_inv_5 * 5) mod 2^32 = 1.
+ constexpr uint32_t mod_inv_5 = 0xcccccccd;
+ constexpr uint32_t mod_inv_25 = 0xc28f5c29; // = mod_inv_5 * mod_inv_5
+
+ while (true) {
+ auto q = rotr(n * mod_inv_25, 2);
+ if (q > max_value<uint32_t>() / 100) break;
+ n = q;
+ s += 2;
+ }
+ auto q = rotr(n * mod_inv_5, 1);
+ if (q <= max_value<uint32_t>() / 10) {
+ n = q;
+ s |= 1;
}
- n >>= s;
return s;
}
// Removes trailing zeros and returns the number of zeros removed (double)
-FMT_INLINE int remove_trailing_zeros(uint64_t& n) FMT_NOEXCEPT {
-#ifdef FMT_BUILTIN_CTZLL
- int t = FMT_BUILTIN_CTZLL(n);
-#else
- int t = ctzll(n);
-#endif
- if (t > float_info<double>::max_trailing_zeros)
- t = float_info<double>::max_trailing_zeros;
- // Divide by 10^8 and reduce to 32-bits
- // Since ret_value.significand <= (2^64 - 1) / 1000 < 10^17,
- // both of the quotient and the r should fit in 32-bits
-
- 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;
- }
- }
+FMT_INLINE int remove_trailing_zeros(uint64_t& n) noexcept {
+ FMT_ASSERT(n != 0, "");
- // Otherwise, work with the remainder
- auto quotient = static_cast<uint32_t>(n / 100000000);
- auto remainder = static_cast<uint32_t>(n - 100000000 * quotient);
+ // This magic number is ceil(2^90 / 10^8).
+ constexpr uint64_t magic_number = 12379400392853802749ull;
+ auto nm = umul128(n, magic_number);
- if (t == 0 || remainder * mod_inv1 > max_quotient1) {
- return 0;
+ // Is n is divisible by 10^8?
+ if ((nm.high() & ((1ull << (90 - 64)) - 1)) == 0 && nm.low() < magic_number) {
+ // If yes, work with the quotient...
+ auto n32 = static_cast<uint32_t>(nm.high() >> (90 - 64));
+ // ... and use the 32 bit variant of the function
+ int s = remove_trailing_zeros(n32, 8);
+ n = n32;
+ return s;
}
- remainder *= mod_inv1;
- if (t == 1 || remainder * mod_inv1 > max_quotient1) {
- n = (remainder >> 1) + quotient * 10000000ull;
- return 1;
- }
- remainder *= mod_inv1;
+ // If n is not divisible by 10^8, work with n itself.
+ constexpr uint64_t mod_inv_5 = 0xcccccccccccccccd;
+ constexpr uint64_t mod_inv_25 = 0x8f5c28f5c28f5c29; // = mod_inv_5 * mod_inv_5
- 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;
+ int s = 0;
+ while (true) {
+ auto q = rotr(n * mod_inv_25, 2);
+ if (q > max_value<uint64_t>() / 100) break;
+ n = q;
+ s += 2;
}
- remainder *= mod_inv1;
-
- if (t == 6 || remainder * mod_inv1 > max_quotient1) {
- n = (remainder >> 6) + quotient * 100ull;
- return 6;
+ auto q = rotr(n * mod_inv_5, 1);
+ if (q <= max_value<uint64_t>() / 10) {
+ n = q;
+ s |= 1;
}
- remainder *= mod_inv1;
- n = (remainder >> 7) + quotient * 10ull;
- return 7;
+ return s;
}
// The main algorithm for shorter interval case
-template <class T>
-FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) FMT_NOEXCEPT {
+template <typename T>
+FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) noexcept {
decimal_fp<T> ret_value;
// Compute k and beta
const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent);
- const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
+ const int beta = exponent + floor_log2_pow10(-minus_k);
// Compute xi and zi
using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
auto xi = cache_accessor<T>::compute_left_endpoint_for_shorter_interval_case(
- cache, beta_minus_1);
+ cache, beta);
auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
- cache, beta_minus_1);
+ cache, beta);
// If the left endpoint is not an integer, increase it
if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
// Otherwise, compute the round-up of y
ret_value.significand =
- cache_accessor<T>::compute_round_up_for_shorter_interval_case(
- cache, beta_minus_1);
+ cache_accessor<T>::compute_round_up_for_shorter_interval_case(cache,
+ beta);
ret_value.exponent = minus_k;
// When tie occurs, choose one of them according to the rule
return ret_value;
}
-template <typename T> decimal_fp<T> to_decimal(T x) FMT_NOEXCEPT {
+template <typename T> decimal_fp<T> to_decimal(T x) noexcept {
// Step 1: integer promotion & Schubfach multiplier calculation.
using carrier_uint = typename float_info<T>::carrier_uint;
// Extract significand bits and exponent bits.
const carrier_uint significand_mask =
- (static_cast<carrier_uint>(1) << float_info<T>::significand_bits) - 1;
+ (static_cast<carrier_uint>(1) << num_significand_bits<T>()) - 1;
carrier_uint significand = (br & significand_mask);
- int exponent = static_cast<int>((br & exponent_mask<T>()) >>
- float_info<T>::significand_bits);
+ int exponent =
+ static_cast<int>((br & exponent_mask<T>()) >> num_significand_bits<T>());
if (exponent != 0) { // Check if normal.
- exponent += float_info<T>::exponent_bias - float_info<T>::significand_bits;
+ exponent -= exponent_bias<T>() + num_significand_bits<T>();
// Shorter interval case; proceed like Schubfach.
+ // In fact, when exponent == 1 and significand == 0, the interval is
+ // regular. However, it can be shown that the end-results are anyway same.
if (significand == 0) return shorter_interval_case<T>(exponent);
- significand |=
- (static_cast<carrier_uint>(1) << float_info<T>::significand_bits);
+ significand |= (static_cast<carrier_uint>(1) << num_significand_bits<T>());
} else {
// Subnormal case; the interval is always regular.
if (significand == 0) return {0, 0};
- exponent = float_info<T>::min_exponent - float_info<T>::significand_bits;
+ exponent =
+ std::numeric_limits<T>::min_exponent - num_significand_bits<T>() - 1;
}
const bool include_left_endpoint = (significand % 2 == 0);
// Compute k and beta.
const int minus_k = floor_log10_pow2(exponent) - float_info<T>::kappa;
const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
- const int beta_minus_1 = exponent + floor_log2_pow10(-minus_k);
+ const int beta = exponent + floor_log2_pow10(-minus_k);
- // Compute zi and deltai
+ // Compute zi and deltai.
// 10^kappa <= deltai < 10^(kappa + 1)
- const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta_minus_1);
+ const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta);
const carrier_uint two_fc = significand << 1;
- const carrier_uint two_fr = two_fc | 1;
- const carrier_uint zi =
- cache_accessor<T>::compute_mul(two_fr << beta_minus_1, cache);
- // Step 2: Try larger divisor; remove trailing zeros if necessary
+ // For the case of binary32, the result of integer check is not correct for
+ // 29711844 * 2^-82
+ // = 6.1442653300000000008655037797566933477355632930994033813476... * 10^-18
+ // and 29711844 * 2^-81
+ // = 1.2288530660000000001731007559513386695471126586198806762695... * 10^-17,
+ // and they are the unique counterexamples. However, since 29711844 is even,
+ // this does not cause any problem for the endpoints calculations; it can only
+ // cause a problem when we need to perform integer check for the center.
+ // Fortunately, with these inputs, that branch is never executed, so we are
+ // fine.
+ const typename cache_accessor<T>::compute_mul_result z_mul =
+ cache_accessor<T>::compute_mul((two_fc | 1) << beta, cache);
+
+ // Step 2: Try larger divisor; remove trailing zeros if necessary.
// Using an upper bound on zi, we might be able to optimize the division
- // better than the compiler; we are computing zi / big_divisor here
+ // better than the compiler; we are computing zi / big_divisor here.
decimal_fp<T> ret_value;
- ret_value.significand = divide_by_10_to_kappa_plus_1(zi);
- uint32_t r = static_cast<uint32_t>(zi - float_info<T>::big_divisor *
- ret_value.significand);
+ ret_value.significand = divide_by_10_to_kappa_plus_1(z_mul.result);
+ uint32_t r = static_cast<uint32_t>(z_mul.result - float_info<T>::big_divisor *
+ ret_value.significand);
- if (r > deltai) {
- goto small_divisor_case_label;
- } else if (r < deltai) {
- // Exclude the right endpoint if necessary
- if (r == 0 && !include_right_endpoint &&
- is_endpoint_integer<T>(two_fr, exponent, minus_k)) {
+ if (r < deltai) {
+ // Exclude the right endpoint if necessary.
+ if (r == 0 && (z_mul.is_integer & !include_right_endpoint)) {
--ret_value.significand;
r = float_info<T>::big_divisor;
goto small_divisor_case_label;
}
+ } else if (r > deltai) {
+ goto small_divisor_case_label;
} else {
- // r == deltai; compare fractional parts
- // Check conditions in the order different from the paper
- // to take advantage of short-circuiting
- const carrier_uint two_fl = two_fc - 1;
- if ((!include_left_endpoint ||
- !is_endpoint_integer<T>(two_fl, exponent, minus_k)) &&
- !cache_accessor<T>::compute_mul_parity(two_fl, cache, beta_minus_1)) {
+ // r == deltai; compare fractional parts.
+ const typename cache_accessor<T>::compute_mul_parity_result x_mul =
+ cache_accessor<T>::compute_mul_parity(two_fc - 1, cache, beta);
+
+ if (!(x_mul.parity | (x_mul.is_integer & include_left_endpoint)))
goto small_divisor_case_label;
- }
}
ret_value.exponent = minus_k + float_info<T>::kappa + 1;
- // We may need to remove trailing zeros
+ // We may need to remove trailing zeros.
ret_value.exponent += remove_trailing_zeros(ret_value.significand);
return ret_value;
- // Step 3: Find the significand with the smaller divisor
+ // Step 3: Find the significand with the smaller divisor.
small_divisor_case_label:
ret_value.significand *= 10;
ret_value.exponent = minus_k + float_info<T>::kappa;
- const uint32_t mask = (1u << float_info<T>::kappa) - 1;
- auto dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
-
- // 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);
- }
+ uint32_t dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
+ const bool approx_y_parity =
+ ((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
+
+ // Is dist divisible by 10^kappa?
+ const bool divisible_by_small_divisor =
+ check_divisibility_and_divide_by_pow10<float_info<T>::kappa>(dist);
+
+ // Add dist / 10^kappa to the significand.
+ ret_value.significand += dist;
+
+ if (!divisible_by_small_divisor) return ret_value;
+
+ // Check z^(f) >= epsilon^(f).
+ // We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
+ // where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f).
+ // Since there are only 2 possibilities, we only need to care about the
+ // parity. Also, zi and r should have the same parity since the divisor
+ // is an even number.
+ const auto y_mul = cache_accessor<T>::compute_mul_parity(two_fc, cache, beta);
+
+ // If z^(f) >= epsilon^(f), we might have a tie when z^(f) == epsilon^(f),
+ // or equivalently, when y is an integer.
+ if (y_mul.parity != approx_y_parity)
+ --ret_value.significand;
+ else if (y_mul.is_integer & (ret_value.significand % 2 != 0))
+ --ret_value.significand;
return ret_value;
}
} // namespace dragonbox
-
-// Formats a floating-point number using a variation of the Fixed-Precision
-// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
-// https://fmt.dev/papers/p372-steele.pdf.
-FMT_CONSTEXPR20 inline void format_dragon(fp value, bool is_predecessor_closer,
- int num_digits, buffer<char>& buf,
- int& exp10) {
- bigint numerator; // 2 * R in (FPP)^2.
- bigint denominator; // 2 * S in (FPP)^2.
- // lower and upper are differences between value and corresponding boundaries.
- bigint lower; // (M^- in (FPP)^2).
- bigint upper_store; // upper's value if different from lower.
- bigint* upper = nullptr; // (M^+ in (FPP)^2).
- // Shift numerator and denominator by an extra bit or two (if lower boundary
- // is closer) to make lower and upper integers. This eliminates multiplication
- // by 2 during later computations.
- int shift = is_predecessor_closer ? 2 : 1;
- uint64_t significand = value.f << shift;
- if (value.e >= 0) {
- numerator.assign(significand);
- numerator <<= value.e;
- lower.assign(1);
- lower <<= value.e;
- if (shift != 1) {
- upper_store.assign(1);
- upper_store <<= value.e + 1;
- upper = &upper_store;
- }
- denominator.assign_pow10(exp10);
- denominator <<= shift;
- } else if (exp10 < 0) {
- numerator.assign_pow10(-exp10);
- lower.assign(numerator);
- if (shift != 1) {
- upper_store.assign(numerator);
- upper_store <<= 1;
- upper = &upper_store;
- }
- numerator *= significand;
- denominator.assign(1);
- denominator <<= shift - value.e;
- } else {
- numerator.assign(significand);
- denominator.assign_pow10(exp10);
- denominator <<= shift - value.e;
- lower.assign(1);
- if (shift != 1) {
- upper_store.assign(1ULL << 1);
- upper = &upper_store;
- }
- }
- // Invariant: value == (numerator / denominator) * pow(10, exp10).
- if (num_digits < 0) {
- // Generate the shortest representation.
- if (!upper) upper = &lower;
- bool even = (value.f & 1) == 0;
- num_digits = 0;
- char* data = buf.data();
- for (;;) {
- int digit = numerator.divmod_assign(denominator);
- bool low = compare(numerator, lower) - even < 0; // numerator <[=] lower.
- // numerator + upper >[=] pow10:
- bool high = add_compare(numerator, *upper, denominator) + even > 0;
- data[num_digits++] = static_cast<char>('0' + digit);
- if (low || high) {
- if (!low) {
- ++data[num_digits - 1];
- } else if (high) {
- int result = add_compare(numerator, numerator, denominator);
- // Round half to even.
- if (result > 0 || (result == 0 && (digit % 2) != 0))
- ++data[num_digits - 1];
- }
- buf.try_resize(to_unsigned(num_digits));
- exp10 -= num_digits - 1;
- return;
- }
- numerator *= 10;
- lower *= 10;
- if (upper != &lower) *upper *= 10;
- }
- }
- // Generate the given number of digits.
- exp10 -= num_digits - 1;
- if (num_digits == 0) {
- denominator *= 10;
- auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
- buf.push_back(digit);
- return;
- }
- buf.try_resize(to_unsigned(num_digits));
- for (int i = 0; i < num_digits - 1; ++i) {
- int digit = numerator.divmod_assign(denominator);
- buf[i] = static_cast<char>('0' + digit);
- numerator *= 10;
- }
- int digit = numerator.divmod_assign(denominator);
- auto result = add_compare(numerator, numerator, denominator);
- if (result > 0 || (result == 0 && (digit % 2) != 0)) {
- if (digit == 9) {
- const auto overflow = '0' + 10;
- buf[num_digits - 1] = overflow;
- // Propagate the carry.
- for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
- buf[i] = '0';
- ++buf[i - 1];
- }
- if (buf[0] == overflow) {
- buf[0] = '1';
- ++exp10;
- }
- return;
- }
- ++digit;
- }
- buf[num_digits - 1] = static_cast<char>('0' + digit);
-}
-
-template <typename Float>
-FMT_HEADER_ONLY_CONSTEXPR20 int format_float(Float value, int precision,
- float_specs specs,
- buffer<char>& buf) {
- // float is passed as double to reduce the number of instantiations.
- static_assert(!std::is_same<Float, float>::value, "");
- FMT_ASSERT(value >= 0, "value is negative");
-
- const bool fixed = specs.format == float_format::fixed;
- if (value <= 0) { // <= instead of == to silence a warning.
- if (precision <= 0 || !fixed) {
- buf.push_back('0');
- return 0;
- }
- buf.try_resize(to_unsigned(precision));
- fill_n(buf.data(), precision, '0');
- return -precision;
- }
-
- if (specs.fallback) return snprintf_float(value, precision, specs, buf);
-
- if (!is_constant_evaluated() && precision < 0) {
- // Use Dragonbox for the shortest format.
- if (specs.binary32) {
- auto dec = dragonbox::to_decimal(static_cast<float>(value));
- write<char>(buffer_appender<char>(buf), dec.significand);
- return dec.exponent;
- }
- auto dec = dragonbox::to_decimal(static_cast<double>(value));
- write<char>(buffer_appender<char>(buf), dec.significand);
- return dec.exponent;
- }
-
- int exp = 0;
- bool use_dragon = true;
- if (is_fast_float<Float>()) {
- // Use Grisu + Dragon4 for the given precision:
- // https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf.
- const int min_exp = -60; // alpha in Grisu.
- int cached_exp10 = 0; // K in Grisu.
- fp normalized = normalize(fp(value));
- const auto cached_pow = get_cached_power(
- min_exp - (normalized.e + fp::num_significand_bits), cached_exp10);
- normalized = normalized * cached_pow;
- gen_digits_handler handler{buf.data(), 0, precision, -cached_exp10, fixed};
- if (grisu_gen_digits(normalized, 1, exp, handler) != digits::error &&
- !is_constant_evaluated()) {
- exp += handler.exp10;
- buf.try_resize(to_unsigned(handler.size));
- use_dragon = false;
- } else {
- exp += handler.size - cached_exp10 - 1;
- precision = handler.precision;
- }
- }
- if (use_dragon) {
- auto f = fp();
- bool is_predecessor_closer =
- specs.binary32 ? f.assign(static_cast<float>(value)) : f.assign(value);
- // Limit precision to the maximum possible number of significant digits in
- // an IEEE754 double because we don't need to generate zeros.
- const int max_double_digits = 767;
- if (precision > max_double_digits) precision = max_double_digits;
- format_dragon(f, is_predecessor_closer, precision, buf, exp);
- }
- if (!fixed && !specs.showpoint) {
- // Remove trailing zeros.
- auto num_digits = buf.size();
- while (num_digits > 0 && buf[num_digits - 1] == '0') {
- --num_digits;
- ++exp;
- }
- buf.try_resize(num_digits);
- }
- return exp;
-}
-
-template <typename T>
-int snprintf_float(T value, int precision, float_specs specs,
- buffer<char>& buf) {
- // Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail.
- FMT_ASSERT(buf.capacity() > buf.size(), "empty buffer");
- static_assert(!std::is_same<T, float>::value, "");
-
- // Subtract 1 to account for the difference in precision since we use %e for
- // both general and exponent format.
- if (specs.format == float_format::general ||
- specs.format == float_format::exp)
- precision = (precision >= 0 ? precision : 6) - 1;
-
- // Build the format string.
- enum { max_format_size = 7 }; // The longest format is "%#.*Le".
- char format[max_format_size];
- char* format_ptr = format;
- *format_ptr++ = '%';
- if (specs.showpoint && specs.format == float_format::hex) *format_ptr++ = '#';
- if (precision >= 0) {
- *format_ptr++ = '.';
- *format_ptr++ = '*';
- }
- if (std::is_same<T, long double>()) *format_ptr++ = 'L';
- *format_ptr++ = specs.format != float_format::hex
- ? (specs.format == float_format::fixed ? 'f' : 'e')
- : (specs.upper ? 'A' : 'a');
- *format_ptr = '\0';
-
- // Format using snprintf.
- auto offset = buf.size();
- for (;;) {
- auto begin = buf.data() + offset;
- auto capacity = buf.capacity() - offset;
-#ifdef FMT_FUZZ
- if (precision > 100000)
- throw std::runtime_error(
- "fuzz mode - avoid large allocation inside snprintf");
-#endif
- // Suppress the warning about a nonliteral format string.
- // Cannot use auto because of a bug in MinGW (#1532).
- int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
- int result = precision >= 0
- ? snprintf_ptr(begin, capacity, format, precision, value)
- : snprintf_ptr(begin, capacity, format, value);
- if (result < 0) {
- // The buffer will grow exponentially.
- buf.try_reserve(buf.capacity() + 1);
- continue;
- }
- auto size = to_unsigned(result);
- // Size equal to capacity means that the last character was truncated.
- if (size >= capacity) {
- buf.try_reserve(size + offset + 1); // Add 1 for the terminating '\0'.
- continue;
- }
- auto is_digit = [](char c) { return c >= '0' && c <= '9'; };
- if (specs.format == float_format::fixed) {
- if (precision == 0) {
- buf.try_resize(size);
- return 0;
- }
- // Find and remove the decimal point.
- auto end = begin + size, p = end;
- do {
- --p;
- } while (is_digit(*p));
- int fraction_size = static_cast<int>(end - p - 1);
- std::memmove(p, p + 1, to_unsigned(fraction_size));
- buf.try_resize(size - 1);
- return -fraction_size;
- }
- if (specs.format == float_format::hex) {
- buf.try_resize(size + offset);
- return 0;
- }
- // Find and parse the exponent.
- auto end = begin + size, exp_pos = end;
- do {
- --exp_pos;
- } while (*exp_pos != 'e');
- char sign = exp_pos[1];
- FMT_ASSERT(sign == '+' || sign == '-', "");
- int exp = 0;
- auto p = exp_pos + 2; // Skip 'e' and sign.
- do {
- FMT_ASSERT(is_digit(*p), "");
- exp = exp * 10 + (*p++ - '0');
- } while (p != end);
- if (sign == '-') exp = -exp;
- int fraction_size = 0;
- if (exp_pos != begin + 1) {
- // Remove trailing zeros.
- auto fraction_end = exp_pos - 1;
- while (*fraction_end == '0') --fraction_end;
- // Move the fractional part left to get rid of the decimal point.
- fraction_size = static_cast<int>(fraction_end - begin - 1);
- std::memmove(begin + 1, begin + 2, to_unsigned(fraction_size));
- }
- buf.try_resize(to_unsigned(fraction_size) + offset + 1);
- return exp - fraction_size;
- }
-}
} // namespace detail
template <> struct formatter<detail::bigint> {
- FMT_CONSTEXPR format_parse_context::iterator parse(
- format_parse_context& ctx) {
+ FMT_CONSTEXPR auto parse(format_parse_context& ctx)
+ -> format_parse_context::iterator {
return ctx.begin();
}
- format_context::iterator format(const detail::bigint& n,
- format_context& ctx) {
+ auto format(const detail::bigint& n, format_context& ctx) const
+ -> format_context::iterator {
auto out = ctx.out();
bool first = true;
for (auto i = n.bigits_.size(); i > 0; --i) {
}
FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
- const char* message) FMT_NOEXCEPT {
+ const char* message) noexcept {
FMT_TRY {
auto ec = std::error_code(error_code, std::generic_category());
write(std::back_inserter(out), std::system_error(ec, message).what());
}
FMT_FUNC void report_system_error(int error_code,
- const char* message) FMT_NOEXCEPT {
+ const char* message) noexcept {
report_error(format_system_error, error_code, message);
}
-// DEPRECATED!
-// This function is defined here and not inline for ABI compatiblity.
-FMT_FUNC void detail::error_handler::on_error(const char* message) {
- throw_format_error(message);
-}
-
FMT_FUNC std::string vformat(string_view fmt, format_args args) {
// Don't optimize the "{}" case to keep the binary size small and because it
// can be better optimized in fmt::format anyway.
return to_string(buffer);
}
-#ifdef _WIN32
namespace detail {
+#ifndef _WIN32
+FMT_FUNC bool write_console(std::FILE*, string_view) { return false; }
+#else
using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
extern "C" __declspec(dllimport) int __stdcall WriteConsoleW( //
void*, const void*, dword, dword*, void*);
-} // namespace detail
-#endif
-namespace detail {
-FMT_FUNC void print(std::FILE* f, string_view text) {
-#ifdef _WIN32
+FMT_FUNC bool write_console(std::FILE* f, string_view text) {
auto fd = _fileno(f);
- if (_isatty(fd)) {
- detail::utf8_to_utf16 u16(string_view(text.data(), text.size()));
- auto written = detail::dword();
- if (detail::WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)),
- u16.c_str(), static_cast<uint32_t>(u16.size()),
- &written, nullptr)) {
- return;
- }
- // Fallback to fwrite on failure. It can happen if the output has been
- // redirected to NUL.
- }
+ if (!_isatty(fd)) return false;
+ auto u16 = utf8_to_utf16(text);
+ auto written = dword();
+ return WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)), u16.c_str(),
+ static_cast<uint32_t>(u16.size()), &written, nullptr) != 0;
+}
+
+// Print assuming legacy (non-Unicode) encoding.
+FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt,
+ basic_format_args<buffer_context<char>>(args));
+ fwrite_fully(buffer.data(), 1, buffer.size(), f);
+}
#endif
- detail::fwrite_fully(text.data(), 1, text.size(), f);
+
+FMT_FUNC void print(std::FILE* f, string_view text) {
+ if (!write_console(f, text)) fwrite_fully(text.data(), 1, text.size(), f);
}
} // namespace detail
-FMT_FUNC void vprint(std::FILE* f, string_view format_str, format_args args) {
- memory_buffer buffer;
- detail::vformat_to(buffer, format_str, args);
+FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, fmt, args);
detail::print(f, {buffer.data(), buffer.size()});
}
-#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);
+FMT_FUNC void vprint(string_view fmt, format_args args) {
+ vprint(stdout, fmt, args);
+}
+
+namespace detail {
+
+struct singleton {
+ unsigned char upper;
+ unsigned char lower_count;
+};
+
+inline auto is_printable(uint16_t x, const singleton* singletons,
+ size_t singletons_size,
+ const unsigned char* singleton_lowers,
+ const unsigned char* normal, size_t normal_size)
+ -> bool {
+ auto upper = x >> 8;
+ auto lower_start = 0;
+ for (size_t i = 0; i < singletons_size; ++i) {
+ auto s = singletons[i];
+ auto lower_end = lower_start + s.lower_count;
+ if (upper < s.upper) break;
+ if (upper == s.upper) {
+ for (auto j = lower_start; j < lower_end; ++j) {
+ if (singleton_lowers[j] == (x & 0xff)) return false;
+ }
+ }
+ lower_start = lower_end;
+ }
+
+ auto xsigned = static_cast<int>(x);
+ auto current = true;
+ for (size_t i = 0; i < normal_size; ++i) {
+ auto v = static_cast<int>(normal[i]);
+ auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v;
+ xsigned -= len;
+ if (xsigned < 0) break;
+ current = !current;
+ }
+ return current;
}
-#endif
-FMT_FUNC void vprint(string_view format_str, format_args args) {
- vprint(stdout, format_str, args);
+// This code is generated by support/printable.py.
+FMT_FUNC auto is_printable(uint32_t cp) -> bool {
+ static constexpr singleton singletons0[] = {
+ {0x00, 1}, {0x03, 5}, {0x05, 6}, {0x06, 3}, {0x07, 6}, {0x08, 8},
+ {0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13},
+ {0x0f, 4}, {0x10, 3}, {0x12, 18}, {0x13, 9}, {0x16, 1}, {0x17, 5},
+ {0x18, 2}, {0x19, 3}, {0x1a, 7}, {0x1c, 2}, {0x1d, 1}, {0x1f, 22},
+ {0x20, 3}, {0x2b, 3}, {0x2c, 2}, {0x2d, 11}, {0x2e, 1}, {0x30, 3},
+ {0x31, 2}, {0x32, 1}, {0xa7, 2}, {0xa9, 2}, {0xaa, 4}, {0xab, 8},
+ {0xfa, 2}, {0xfb, 5}, {0xfd, 4}, {0xfe, 3}, {0xff, 9},
+ };
+ static constexpr unsigned char singletons0_lower[] = {
+ 0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90,
+ 0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f,
+ 0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1,
+ 0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04,
+ 0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d,
+ 0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf,
+ 0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
+ 0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d,
+ 0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d,
+ 0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d,
+ 0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5,
+ 0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7,
+ 0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49,
+ 0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7,
+ 0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7,
+ 0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e,
+ 0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16,
+ 0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e,
+ 0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f,
+ 0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf,
+ 0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0,
+ 0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27,
+ 0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91,
+ 0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7,
+ 0xfe, 0xff,
+ };
+ static constexpr singleton singletons1[] = {
+ {0x00, 6}, {0x01, 1}, {0x03, 1}, {0x04, 2}, {0x08, 8}, {0x09, 2},
+ {0x0a, 5}, {0x0b, 2}, {0x0e, 4}, {0x10, 1}, {0x11, 2}, {0x12, 5},
+ {0x13, 17}, {0x14, 1}, {0x15, 2}, {0x17, 2}, {0x19, 13}, {0x1c, 5},
+ {0x1d, 8}, {0x24, 1}, {0x6a, 3}, {0x6b, 2}, {0xbc, 2}, {0xd1, 2},
+ {0xd4, 12}, {0xd5, 9}, {0xd6, 2}, {0xd7, 2}, {0xda, 1}, {0xe0, 5},
+ {0xe1, 2}, {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2}, {0xf9, 2},
+ {0xfa, 2}, {0xfb, 1},
+ };
+ static constexpr unsigned char singletons1_lower[] = {
+ 0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07,
+ 0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36,
+ 0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87,
+ 0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
+ 0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b,
+ 0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9,
+ 0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66,
+ 0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27,
+ 0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc,
+ 0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7,
+ 0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6,
+ 0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c,
+ 0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66,
+ 0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0,
+ 0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93,
+ };
+ static constexpr unsigned char normal0[] = {
+ 0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04,
+ 0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0,
+ 0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01,
+ 0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03,
+ 0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03,
+ 0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a,
+ 0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15,
+ 0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f,
+ 0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80,
+ 0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07,
+ 0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06,
+ 0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04,
+ 0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac,
+ 0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c,
+ 0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11,
+ 0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c,
+ 0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b,
+ 0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6,
+ 0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03,
+ 0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80,
+ 0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06,
+ 0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c,
+ 0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17,
+ 0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80,
+ 0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80,
+ 0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d,
+ };
+ static constexpr unsigned char normal1[] = {
+ 0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f,
+ 0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e,
+ 0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04,
+ 0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09,
+ 0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16,
+ 0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f,
+ 0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36,
+ 0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33,
+ 0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08,
+ 0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e,
+ 0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41,
+ 0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03,
+ 0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22,
+ 0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04,
+ 0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45,
+ 0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03,
+ 0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81,
+ 0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75,
+ 0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1,
+ 0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a,
+ 0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11,
+ 0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09,
+ 0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89,
+ 0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6,
+ 0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09,
+ 0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50,
+ 0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05,
+ 0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83,
+ 0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05,
+ 0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80,
+ 0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80,
+ 0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07,
+ 0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e,
+ 0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07,
+ 0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06,
+ };
+ auto lower = static_cast<uint16_t>(cp);
+ if (cp < 0x10000) {
+ return is_printable(lower, singletons0,
+ sizeof(singletons0) / sizeof(*singletons0),
+ singletons0_lower, normal0, sizeof(normal0));
+ }
+ if (cp < 0x20000) {
+ return is_printable(lower, singletons1,
+ sizeof(singletons1) / sizeof(*singletons1),
+ singletons1_lower, normal1, sizeof(normal1));
+ }
+ if (0x2a6de <= cp && cp < 0x2a700) return false;
+ if (0x2b735 <= cp && cp < 0x2b740) return false;
+ if (0x2b81e <= cp && cp < 0x2b820) return false;
+ if (0x2cea2 <= cp && cp < 0x2ceb0) return false;
+ if (0x2ebe1 <= cp && cp < 0x2f800) return false;
+ if (0x2fa1e <= cp && cp < 0x30000) return false;
+ if (0x3134b <= cp && cp < 0xe0100) return false;
+ if (0xe01f0 <= cp && cp < 0x110000) return false;
+ return cp < 0x110000;
}
+} // namespace detail
+
FMT_END_NAMESPACE
#endif // FMT_FORMAT_INL_H_
/*
- 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.
+ 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 <cmath> // std::signbit
-#include <cstdint> // uint32_t
-#include <limits> // std::numeric_limits
-#include <memory> // std::uninitialized_copy
-#include <stdexcept> // std::runtime_error
-#include <system_error> // std::system_error
-#include <utility> // std::swap
+#include <cmath> // std::signbit
+#include <cstdint> // uint32_t
+#include <cstring> // std::memcpy
+#include <initializer_list> // std::initializer_list
+#include <limits> // std::numeric_limits
+#include <memory> // std::uninitialized_copy
+#include <stdexcept> // std::runtime_error
+#include <system_error> // std::system_error
#ifdef __cpp_lib_bit_cast
# include <bit> // std::bitcast
#include "core.h"
-#if FMT_GCC_VERSION
-# define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
+#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
+# define FMT_INLINE_VARIABLE inline
#else
-# define FMT_GCC_VISIBILITY_HIDDEN
+# define FMT_INLINE_VARIABLE
#endif
-#ifdef __NVCC__
-# define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__)
+#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
+# define FMT_FALLTHROUGH [[fallthrough]]
+#elif defined(__clang__)
+# define FMT_FALLTHROUGH [[clang::fallthrough]]
+#elif FMT_GCC_VERSION >= 700 && \
+ (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
+# define FMT_FALLTHROUGH [[gnu::fallthrough]]
#else
-# define FMT_CUDA_VERSION 0
+# define FMT_FALLTHROUGH
+#endif
+
+#ifndef FMT_DEPRECATED
+# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900
+# define FMT_DEPRECATED [[deprecated]]
+# else
+# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
+# define FMT_DEPRECATED __attribute__((deprecated))
+# elif FMT_MSC_VERSION
+# define FMT_DEPRECATED __declspec(deprecated)
+# else
+# define FMT_DEPRECATED /* deprecated */
+# endif
+# endif
+#endif
+
+#ifndef FMT_NO_UNIQUE_ADDRESS
+# if FMT_CPLUSPLUS >= 202002L
+# if FMT_HAS_CPP_ATTRIBUTE(no_unique_address)
+# define FMT_NO_UNIQUE_ADDRESS [[no_unique_address]]
+# elif FMT_MSC_VERSION >= 1929 // VS2019 v16.10 and later
+# define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
+# endif
+# endif
+#endif
+#ifndef FMT_NO_UNIQUE_ADDRESS
+# define FMT_NO_UNIQUE_ADDRESS
+#endif
+
+#if FMT_GCC_VERSION || defined(__clang__)
+# define FMT_VISIBILITY(value) __attribute__((visibility(value)))
+#else
+# define FMT_VISIBILITY(value)
#endif
#ifdef __has_builtin
# define FMT_NOINLINE
#endif
-#if FMT_MSC_VER
-# define FMT_MSC_DEFAULT = default
-#else
-# define FMT_MSC_DEFAULT
-#endif
-
#ifndef FMT_THROW
# if FMT_EXCEPTIONS
-# if FMT_MSC_VER || FMT_NVCC
+# if FMT_MSC_VERSION || defined(__NVCC__)
FMT_BEGIN_NAMESPACE
namespace detail {
template <typename Exception> inline void do_throw(const Exception& x) {
# define FMT_THROW(x) throw x
# endif
# else
-# define FMT_THROW(x) \
- do { \
- FMT_ASSERT(false, (x).what()); \
- } while (false)
+# define FMT_THROW(x) \
+ ::fmt::detail::assert_fail(__FILE__, __LINE__, (x).what())
# endif
#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_USE_USER_DEFINED_LITERALS
// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 407 || \
- FMT_MSC_VER >= 1900) && \
+ FMT_MSC_VERSION >= 1900) && \
(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
# define FMT_USE_USER_DEFINED_LITERALS 1
# else
// __builtin_clz is broken in clang with Microsoft CodeGen:
// https://github.com/fmtlib/fmt/issues/519.
-#if !FMT_MSC_VER
+#if !FMT_MSC_VERSION
# if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
# endif
// __builtin_ctz is broken in Intel Compiler Classic on Windows:
// https://github.com/fmtlib/fmt/issues/2510.
#ifndef __ICL
-# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION
+# if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION || \
+ defined(__NVCOMPILER)
# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
# endif
-# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
+# if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || \
+ FMT_ICC_VERSION || defined(__NVCOMPILER)
# define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
# endif
#endif
-#if FMT_MSC_VER
+#if FMT_MSC_VERSION
# include <intrin.h> // _BitScanReverse[64], _BitScanForward[64], _umul128
#endif
// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
// MSVC intrinsics if the clz and clzll builtins are not available.
-#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(FMT_BUILTIN_CTZLL)
+#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL) && \
+ !defined(FMT_BUILTIN_CTZLL)
FMT_BEGIN_NAMESPACE
namespace detail {
// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
_BitScanReverse64(&r, x);
# else
// Scan the high 32 bits.
- if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) return 63 ^ (r + 32);
+ if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
+ return 63 ^ static_cast<int>(r + 32);
// Scan the low 32 bits.
_BitScanReverse(&r, static_cast<uint32_t>(x));
# endif
FMT_END_NAMESPACE
#endif
-#ifdef FMT_HEADER_ONLY
-# define FMT_HEADER_ONLY_CONSTEXPR20 FMT_CONSTEXPR20
-#else
-# define FMT_HEADER_ONLY_CONSTEXPR20
-#endif
-
FMT_BEGIN_NAMESPACE
+
+template <typename...> struct disjunction : std::false_type {};
+template <typename P> struct disjunction<P> : P {};
+template <typename P1, typename... Pn>
+struct disjunction<P1, Pn...>
+ : conditional_t<bool(P1::value), P1, disjunction<Pn...>> {};
+
+template <typename...> struct conjunction : std::true_type {};
+template <typename P> struct conjunction<P> : P {};
+template <typename P1, typename... Pn>
+struct conjunction<P1, Pn...>
+ : conditional_t<bool(P1::value), conjunction<Pn...>, P1> {};
+
namespace detail {
+FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) {
+ ignore_unused(condition);
+#ifdef FMT_FUZZ
+ if (condition) throw std::runtime_error("fuzzing limit reached");
+#endif
+}
+
+template <typename CharT, CharT... C> struct string_literal {
+ static constexpr CharT value[sizeof...(C)] = {C...};
+ constexpr operator basic_string_view<CharT>() const {
+ return {value, sizeof...(C)};
+ }
+};
+
+#if FMT_CPLUSPLUS < 201703L
+template <typename CharT, CharT... C>
+constexpr CharT string_literal<CharT, C...>::value[sizeof...(C)];
+#endif
+
template <typename Streambuf> class formatbuf : public Streambuf {
private:
using char_type = typename Streambuf::char_type;
};
// Implementation of std::bit_cast for pre-C++20.
-template <typename To, typename From>
+template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) == sizeof(From))>
FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
- static_assert(sizeof(To) == sizeof(From), "size mismatch");
#ifdef __cpp_lib_bit_cast
if (is_constant_evaluated()) return std::bit_cast<To>(from);
#endif
auto to = To();
- std::memcpy(&to, &from, sizeof(to));
+ // The cast suppresses a bogus -Wclass-memaccess on GCC.
+ std::memcpy(static_cast<void*>(&to), &from, sizeof(to));
return to;
}
#endif
}
-// A fallback implementation of uintptr_t for systems that lack it.
-struct fallback_uintptr {
- unsigned char value[sizeof(void*)];
+class uint128_fallback {
+ private:
+ uint64_t lo_, hi_;
+
+ friend uint128_fallback umul128(uint64_t x, uint64_t y) noexcept;
+
+ public:
+ constexpr uint128_fallback(uint64_t hi, uint64_t lo) : lo_(lo), hi_(hi) {}
+ constexpr uint128_fallback(uint64_t value = 0) : lo_(value), hi_(0) {}
+
+ constexpr uint64_t high() const noexcept { return hi_; }
+ constexpr uint64_t low() const noexcept { return lo_; }
+
+ template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+ constexpr explicit operator T() const {
+ return static_cast<T>(lo_);
+ }
+
+ friend constexpr auto operator==(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> bool {
+ return lhs.hi_ == rhs.hi_ && lhs.lo_ == rhs.lo_;
+ }
+ friend constexpr auto operator!=(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> bool {
+ return !(lhs == rhs);
+ }
+ friend constexpr auto operator>(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> bool {
+ return lhs.hi_ != rhs.hi_ ? lhs.hi_ > rhs.hi_ : lhs.lo_ > rhs.lo_;
+ }
+ friend constexpr auto operator|(const uint128_fallback& lhs,
+ const uint128_fallback& rhs)
+ -> uint128_fallback {
+ return {lhs.hi_ | rhs.hi_, lhs.lo_ | rhs.lo_};
+ }
+ friend constexpr auto operator&(const uint128_fallback& lhs,
+ const uint128_fallback& rhs)
+ -> uint128_fallback {
+ return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
+ }
+ friend constexpr auto operator~(const uint128_fallback& n)
+ -> uint128_fallback {
+ return {~n.hi_, ~n.lo_};
+ }
+ friend auto operator+(const uint128_fallback& lhs,
+ const uint128_fallback& rhs) -> uint128_fallback {
+ auto result = uint128_fallback(lhs);
+ result += rhs;
+ return result;
+ }
+ friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
+ -> uint128_fallback {
+ FMT_ASSERT(lhs.hi_ == 0, "");
+ uint64_t hi = (lhs.lo_ >> 32) * rhs;
+ uint64_t lo = (lhs.lo_ & ~uint32_t()) * rhs;
+ uint64_t new_lo = (hi << 32) + lo;
+ return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo};
+ }
+ friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
+ -> uint128_fallback {
+ return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs};
+ }
+ FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback {
+ if (shift == 64) return {0, hi_};
+ if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64);
+ return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)};
+ }
+ FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback {
+ if (shift == 64) return {lo_, 0};
+ if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64);
+ return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)};
+ }
+ FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& {
+ return *this = *this >> shift;
+ }
+ FMT_CONSTEXPR void operator+=(uint128_fallback n) {
+ uint64_t new_lo = lo_ + n.lo_;
+ uint64_t new_hi = hi_ + n.hi_ + (new_lo < lo_ ? 1 : 0);
+ FMT_ASSERT(new_hi >= hi_, "");
+ lo_ = new_lo;
+ hi_ = new_hi;
+ }
+ FMT_CONSTEXPR void operator&=(uint128_fallback n) {
+ lo_ &= n.lo_;
+ hi_ &= n.hi_;
+ }
- fallback_uintptr() = default;
- explicit fallback_uintptr(const void* p) {
- *this = bit_cast<fallback_uintptr>(p);
- if (const_check(is_big_endian())) {
- for (size_t i = 0, j = sizeof(void*) - 1; i < j; ++i, --j)
- std::swap(value[i], value[j]);
+ FMT_CONSTEXPR20 uint128_fallback& operator+=(uint64_t n) noexcept {
+ if (is_constant_evaluated()) {
+ lo_ += n;
+ hi_ += (lo_ < n ? 1 : 0);
+ return *this;
}
+#if FMT_HAS_BUILTIN(__builtin_addcll) && !defined(__ibmxl__)
+ unsigned long long carry;
+ lo_ = __builtin_addcll(lo_, n, 0, &carry);
+ hi_ += carry;
+#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !defined(__ibmxl__)
+ unsigned long long result;
+ auto carry = __builtin_ia32_addcarryx_u64(0, lo_, n, &result);
+ lo_ = result;
+ hi_ += carry;
+#elif defined(_MSC_VER) && defined(_M_X64)
+ auto carry = _addcarry_u64(0, lo_, n, &lo_);
+ _addcarry_u64(carry, hi_, 0, &hi_);
+#else
+ lo_ += n;
+ hi_ += (lo_ < n ? 1 : 0);
+#endif
+ return *this;
}
};
+
+using uint128_t = conditional_t<FMT_USE_INT128, uint128_opt, uint128_fallback>;
+
#ifdef UINTPTR_MAX
using uintptr_t = ::uintptr_t;
-inline auto to_uintptr(const void* p) -> uintptr_t {
- return bit_cast<uintptr_t>(p);
-}
#else
-using uintptr_t = fallback_uintptr;
-inline auto to_uintptr(const void* p) -> fallback_uintptr {
- return fallback_uintptr(p);
-}
+using uintptr_t = uint128_t;
#endif
// Returns the largest possible value for type T. Same as
return std::numeric_limits<T>::digits;
}
// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
-template <> constexpr auto num_bits<int128_t>() -> int { return 128; }
+template <> constexpr auto num_bits<int128_opt>() -> int { return 128; }
template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
-template <> constexpr auto num_bits<fallback_uintptr>() -> int {
- return static_cast<int>(sizeof(void*) *
- std::numeric_limits<unsigned char>::digits);
+
+// A heterogeneous bit_cast used for converting 96-bit long double to uint128_t
+// and 128-bit pointers to uint128_fallback.
+template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) > sizeof(From))>
+inline auto bit_cast(const From& from) -> To {
+ constexpr auto size = static_cast<int>(sizeof(From) / sizeof(unsigned));
+ struct data_t {
+ unsigned value[static_cast<unsigned>(size)];
+ } data = bit_cast<data_t>(from);
+ auto result = To();
+ if (const_check(is_big_endian())) {
+ for (int i = 0; i < size; ++i)
+ result = (result << num_bits<unsigned>()) | data.value[i];
+ } else {
+ for (int i = size - 1; i >= 0; --i)
+ result = (result << num_bits<unsigned>()) | data.value[i];
+ }
+ return result;
+}
+
+template <typename UInt>
+FMT_CONSTEXPR20 inline auto countl_zero_fallback(UInt n) -> int {
+ int lz = 0;
+ constexpr UInt msb_mask = static_cast<UInt>(1) << (num_bits<UInt>() - 1);
+ for (; (n & msb_mask) == 0; n <<= 1) lz++;
+ return lz;
+}
+
+FMT_CONSTEXPR20 inline auto countl_zero(uint32_t n) -> int {
+#ifdef FMT_BUILTIN_CLZ
+ if (!is_constant_evaluated()) return FMT_BUILTIN_CLZ(n);
+#endif
+ return countl_zero_fallback(n);
+}
+
+FMT_CONSTEXPR20 inline auto countl_zero(uint64_t n) -> int {
+#ifdef FMT_BUILTIN_CLZLL
+ if (!is_constant_evaluated()) return FMT_BUILTIN_CLZLL(n);
+#endif
+ return countl_zero_fallback(n);
}
FMT_INLINE void assume(bool condition) {
(void)condition;
-#if FMT_HAS_BUILTIN(__builtin_assume)
+#if FMT_HAS_BUILTIN(__builtin_assume) && !FMT_ICC_VERSION
__builtin_assume(condition);
+#elif FMT_GCC_VERSION
+ if (!condition) __builtin_unreachable();
#endif
}
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>
-constexpr auto make_checked(T* p, size_t size) -> checked_ptr<T> {
- return {p, size};
-}
-#else
-template <typename T> using checked_ptr = T*;
-template <typename T> constexpr auto make_checked(T* p, size_t) -> T* {
- return p;
-}
-#endif
-
// Attempts to reserve space for n extra characters in the output range.
// Returns a pointer to the reserved range or a reference to it.
template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
__attribute__((no_sanitize("undefined")))
#endif
inline auto
-reserve(std::back_insert_iterator<Container> it, size_t n)
- -> checked_ptr<typename Container::value_type> {
+reserve(std::back_insert_iterator<Container> it, size_t n) ->
+ typename Container::value_type* {
Container& c = get_container(it);
size_t size = c.size();
c.resize(size + n);
- return make_checked(get_data(c) + size, n);
+ return get_data(c) + size;
}
template <typename T>
}
template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-inline auto base_iterator(std::back_insert_iterator<Container>& it,
- checked_ptr<typename Container::value_type>)
+inline auto base_iterator(std::back_insert_iterator<Container> it,
+ typename Container::value_type*)
-> std::back_insert_iterator<Container> {
return it;
}
constexpr const int shiftc[] = {0, 18, 12, 6, 0};
constexpr const int shifte[] = {0, 6, 4, 2, 0};
- int len = code_point_length(s);
- const char* next = s + len;
+ int len = "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4"
+ [static_cast<unsigned char>(*s) >> 3];
+ // Compute the pointer to the next character early so that the next
+ // iteration can start working on the next character. Neither Clang
+ // nor GCC figure out this reordering on their own.
+ const char* next = s + len + !len;
+
+ using uchar = unsigned char;
// Assume a four-byte character and load four bytes. Unused bits are
// shifted out.
- *c = uint32_t(s[0] & masks[len]) << 18;
- *c |= uint32_t(s[1] & 0x3f) << 12;
- *c |= uint32_t(s[2] & 0x3f) << 6;
- *c |= uint32_t(s[3] & 0x3f) << 0;
+ *c = uint32_t(uchar(s[0]) & masks[len]) << 18;
+ *c |= uint32_t(uchar(s[1]) & 0x3f) << 12;
+ *c |= uint32_t(uchar(s[2]) & 0x3f) << 6;
+ *c |= uint32_t(uchar(s[3]) & 0x3f) << 0;
*c >>= shiftc[len];
// Accumulate the various error conditions.
- using uchar = unsigned char;
*e = (*c < mins[len]) << 6; // non-canonical encoding
*e |= ((*c >> 11) == 0x1b) << 7; // surrogate half?
*e |= (*c > 0x10FFFF) << 8; // out of range?
return next;
}
-constexpr uint32_t invalid_code_point = ~uint32_t();
+constexpr FMT_INLINE_VARIABLE uint32_t invalid_code_point = ~uint32_t();
// Invokes f(cp, sv) for every code point cp in s with sv being the string view
// corresponding to the code point. cp is invalid_code_point on error.
auto error = 0;
auto end = utf8_decode(buf_ptr, &cp, &error);
bool result = f(error ? invalid_code_point : cp,
- string_view(ptr, to_unsigned(end - buf_ptr)));
- return result ? end : nullptr;
+ string_view(ptr, error ? 1 : to_unsigned(end - buf_ptr)));
+ return result ? (error ? buf_ptr + 1 : end) : nullptr;
};
auto p = s.data();
const size_t block_size = 4; // utf8_decode always reads blocks of 4 chars.
return true;
}
};
+ // We could avoid branches by using utf8_decode directly.
for_each_codepoint(s, count_code_points{&num_code_points});
return num_code_points;
}
inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
- return compute_width(basic_string_view<char>(
- reinterpret_cast<const char*>(s.data()), s.size()));
+ return compute_width(
+ string_view(reinterpret_cast<const char*>(s.data()), s.size()));
}
template <typename Char>
}
// Calculates the index of the nth code point in a UTF-8 string.
-inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
- -> size_t {
- const char8_type* data = s.data();
+inline auto code_point_index(string_view s, size_t n) -> size_t {
+ const char* data = s.data();
size_t num_code_points = 0;
for (size_t i = 0, size = s.size(); i != size; ++i) {
if ((data[i] & 0xc0) != 0x80 && ++num_code_points > n) return i;
return s.size();
}
+inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
+ -> size_t {
+ return code_point_index(
+ string_view(reinterpret_cast<const char*>(s.data()), s.size()), n);
+}
+
+template <typename T> struct is_integral : std::is_integral<T> {};
+template <> struct is_integral<int128_opt> : std::true_type {};
+template <> struct is_integral<uint128_t> : std::true_type {};
+
+template <typename T>
+using is_signed =
+ std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
+ std::is_same<T, int128_opt>::value>;
+
+template <typename T>
+using is_integer =
+ bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
+ !std::is_same<T, char>::value &&
+ !std::is_same<T, wchar_t>::value>;
+
+#ifndef FMT_USE_FLOAT
+# define FMT_USE_FLOAT 1
+#endif
+#ifndef FMT_USE_DOUBLE
+# define FMT_USE_DOUBLE 1
+#endif
+#ifndef FMT_USE_LONG_DOUBLE
+# define FMT_USE_LONG_DOUBLE 1
+#endif
+
+#ifndef FMT_USE_FLOAT128
+# ifdef __clang__
+// Clang emulates GCC, so it has to appear early.
+# if FMT_HAS_INCLUDE(<quadmath.h>)
+# define FMT_USE_FLOAT128 1
+# endif
+# elif defined(__GNUC__)
+// GNU C++:
+# if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__)
+# define FMT_USE_FLOAT128 1
+# endif
+# endif
+# ifndef FMT_USE_FLOAT128
+# define FMT_USE_FLOAT128 0
+# endif
+#endif
+
+#if FMT_USE_FLOAT128
+using float128 = __float128;
+#else
+using float128 = void;
+#endif
+template <typename T> using is_float128 = std::is_same<T, float128>;
+
+template <typename T>
+using is_floating_point =
+ bool_constant<std::is_floating_point<T>::value || is_float128<T>::value>;
+
template <typename T, bool = std::is_floating_point<T>::value>
struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
sizeof(T) <= sizeof(double)> {};
template <typename T> struct is_fast_float<T, false> : std::false_type {};
+template <typename T>
+using is_double_double = bool_constant<std::numeric_limits<T>::digits == 106>;
+
#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
# define FMT_USE_FULL_CACHE_DRAGONBOX 0
#endif
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));
+ std::uninitialized_copy_n(begin, count, ptr_ + size_);
size_ += count;
begin += count;
}
struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
} // namespace detail
-FMT_MODULE_EXPORT_BEGIN
+FMT_BEGIN_EXPORT
// The number of characters to store in the basic_memory_buffer object itself
// to avoid dynamic memory allocation.
T store_[SIZE];
// Don't inherit from Allocator avoid generating type_info for it.
- Allocator alloc_;
+ FMT_NO_UNIQUE_ADDRESS Allocator alloc_;
// Deallocate memory allocated by the buffer.
FMT_CONSTEXPR20 void deallocate() {
}
protected:
- FMT_CONSTEXPR20 void grow(size_t size) override;
+ FMT_CONSTEXPR20 void grow(size_t size) override {
+ detail::abort_fuzzing_if(size > 5000);
+ const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
+ size_t old_capacity = this->capacity();
+ size_t new_capacity = old_capacity + old_capacity / 2;
+ if (size > new_capacity)
+ new_capacity = size;
+ else if (new_capacity > max_size)
+ new_capacity = size > max_size ? size : max_size;
+ T* old_data = this->data();
+ T* new_data =
+ std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
+ // Suppress a bogus -Wstringop-overflow in gcc 13.1 (#3481).
+ detail::assume(this->size() <= new_capacity);
+ // The following code doesn't throw, so the raw pointer above doesn't leak.
+ std::uninitialized_copy_n(old_data, this->size(), new_data);
+ this->set(new_data, new_capacity);
+ // deallocate must not throw according to the standard, but even if it does,
+ // the buffer already uses the new storage and will deallocate it in
+ // destructor.
+ if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
+ }
public:
using value_type = T;
const Allocator& alloc = Allocator())
: alloc_(alloc) {
this->set(store_, SIZE);
- if (detail::is_constant_evaluated()) {
- detail::fill_n(store_, SIZE, T{});
- }
+ if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T());
}
FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
size_t size = other.size(), capacity = other.capacity();
if (data == other.store_) {
this->set(store_, capacity);
- if (detail::is_constant_evaluated()) {
- detail::copy_str<T>(other.store_, other.store_ + size,
- detail::make_checked(store_, capacity));
- } else {
- std::uninitialized_copy(other.store_, other.store_ + size,
- detail::make_checked(store_, capacity));
- }
+ detail::copy_str<T>(other.store_, other.store_ + size, store_);
} else {
this->set(data, capacity);
// Set pointer to the inline array so that delete is not called
// when deallocating.
other.set(other.store_, 0);
+ other.clear();
}
this->resize(size);
}
of the other object to it.
\endrst
*/
- FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other)
- FMT_NOEXCEPT {
+ FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept {
move(other);
}
Moves the content of the other ``basic_memory_buffer`` object to this one.
\endrst
*/
- auto operator=(basic_memory_buffer&& other) FMT_NOEXCEPT
- -> basic_memory_buffer& {
+ auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
FMT_ASSERT(this != &other, "");
deallocate();
move(other);
}
};
-template <typename T, size_t SIZE, typename Allocator>
-FMT_CONSTEXPR20 void basic_memory_buffer<T, SIZE, Allocator>::grow(
- size_t size) {
-#ifdef FMT_FUZZ
- if (size > 5000) throw std::runtime_error("fuzz mode - won't grow that much");
-#endif
- const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
- size_t old_capacity = this->capacity();
- size_t new_capacity = old_capacity + old_capacity / 2;
- if (size > new_capacity)
- new_capacity = size;
- else if (new_capacity > max_size)
- new_capacity = size > max_size ? size : max_size;
- T* old_data = this->data();
- T* new_data =
- std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
- // The following code doesn't throw, so the raw pointer above doesn't leak.
- std::uninitialized_copy(old_data, old_data + this->size(),
- detail::make_checked(new_data, new_capacity));
- this->set(new_data, new_capacity);
- // deallocate must not throw according to the standard, but even if it does,
- // the buffer already uses the new storage and will deallocate it in
- // destructor.
- if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
-}
-
using memory_buffer = basic_memory_buffer<char>;
template <typename T, size_t SIZE, typename Allocator>
struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
};
+FMT_END_EXPORT
namespace detail {
+FMT_API bool write_console(std::FILE* f, string_view text);
FMT_API void print(std::FILE*, string_view);
-}
+} // namespace detail
+FMT_BEGIN_EXPORT
+
+// Suppress a misleading warning in older versions of clang.
+#if FMT_CLANG_VERSION
+# pragma clang diagnostic ignored "-Wweak-vtables"
+#endif
-/** A formatting error such as invalid format string. */
-FMT_CLASS_API
-class FMT_API format_error : public std::runtime_error {
+/** An error reported from a formatting function. */
+class FMT_VISIBILITY("default") format_error : public std::runtime_error {
public:
- explicit format_error(const char* message) : std::runtime_error(message) {}
- explicit format_error(const std::string& message)
- : std::runtime_error(message) {}
- format_error(const format_error&) = default;
- format_error& operator=(const format_error&) = default;
- format_error(format_error&&) = default;
- format_error& operator=(format_error&&) = default;
- ~format_error() FMT_NOEXCEPT override FMT_MSC_DEFAULT;
+ using std::runtime_error::runtime_error;
};
-/**
- \rst
- Constructs a `~fmt::format_arg_store` object that contains references
- to arguments and can be implicitly converted to `~fmt::format_args`.
- If ``fmt`` is a compile-time string then `make_args_checked` checks
- its validity at compile time.
- \endrst
- */
-template <typename... Args, typename S, typename Char = char_t<S>>
-FMT_INLINE auto make_args_checked(const S& fmt,
- const remove_reference_t<Args>&... args)
- -> format_arg_store<buffer_context<Char>, remove_reference_t<Args>...> {
- static_assert(
- detail::count<(
- std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
- std::is_reference<Args>::value)...>() == 0,
- "passing views as lvalues is disallowed");
- detail::check_format_string<Args...>(fmt);
- return {args...};
-}
-
-// compile-time support
namespace detail_exported {
-#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <typename Char, size_t N> struct fixed_string {
constexpr fixed_string(const Char (&str)[N]) {
detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
str + N, data);
}
- Char data[N]{};
+ Char data[N] = {};
};
#endif
}
} // namespace detail_exported
-FMT_BEGIN_DETAIL_NAMESPACE
+class loc_value {
+ private:
+ basic_format_arg<format_context> value_;
-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 {};
+ public:
+ template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
+ loc_value(T value) : value_(detail::make_arg<format_context>(value)) {}
-template <typename T>
-using is_signed =
- std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
- std::is_same<T, int128_t>::value>;
+ template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
+ loc_value(T) {}
+
+ template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
+ return visit_format_arg(vis, value_);
+ }
+};
+
+// A locale facet that formats values in UTF-8.
+// It is parameterized on the locale to avoid the heavy <locale> include.
+template <typename Locale> class format_facet : public Locale::facet {
+ private:
+ std::string separator_;
+ std::string grouping_;
+ std::string decimal_point_;
+
+ protected:
+ virtual auto do_put(appender out, loc_value val,
+ const format_specs<>& specs) const -> bool;
+
+ public:
+ static FMT_API typename Locale::id id;
+
+ explicit format_facet(Locale& loc);
+ explicit format_facet(string_view sep = "",
+ std::initializer_list<unsigned char> g = {3},
+ std::string decimal_point = ".")
+ : separator_(sep.data(), sep.size()),
+ grouping_(g.begin(), g.end()),
+ decimal_point_(decimal_point) {}
+
+ auto put(appender out, loc_value val, const format_specs<>& specs) const
+ -> bool {
+ return do_put(out, val, specs);
+ }
+};
+
+namespace detail {
// Returns true if value is negative, false otherwise.
// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
-FMT_CONSTEXPR auto is_negative(T value) -> bool {
+constexpr auto is_negative(T value) -> bool {
return value < 0;
}
template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
-FMT_CONSTEXPR auto is_negative(T) -> bool {
+constexpr auto is_negative(T) -> bool {
return false;
}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR auto is_supported_floating_point(T) -> uint16_t {
- return (std::is_same<T, float>::value && FMT_USE_FLOAT) ||
- (std::is_same<T, double>::value && FMT_USE_DOUBLE) ||
- (std::is_same<T, long double>::value && FMT_USE_LONG_DOUBLE);
+template <typename T>
+FMT_CONSTEXPR auto is_supported_floating_point(T) -> bool {
+ if (std::is_same<T, float>()) return FMT_USE_FLOAT;
+ if (std::is_same<T, double>()) return FMT_USE_DOUBLE;
+ if (std::is_same<T, long double>()) return FMT_USE_LONG_DOUBLE;
+ return true;
}
// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
}
}
#if FMT_USE_INT128
-FMT_CONSTEXPR inline auto count_digits(uint128_t n) -> int {
+FMT_CONSTEXPR inline auto count_digits(uint128_opt n) -> int {
return count_digits_fallback(n);
}
#endif
template <int BITS, typename UInt>
FMT_CONSTEXPR auto count_digits(UInt n) -> int {
#ifdef FMT_BUILTIN_CLZ
- if (num_bits<UInt>() == 32)
+ if (!is_constant_evaluated() && num_bits<UInt>() == 32)
return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
#endif
// Lambda avoids unreachable code warnings from NVHPC.
}(n);
}
-template <> auto count_digits<4>(detail::fallback_uintptr n) -> int;
-
#ifdef FMT_BUILTIN_CLZ
// It is a separate function rather than a part of count_digits to workaround
// the lack of static constexpr in constexpr functions.
FMT_INLINE auto do_count_digits(uint32_t n) -> int {
// An optimization by Kendall Willets from https://bit.ly/3uOIQrB.
// This increments the upper 32 bits (log10(T) - 1) when >= T is added.
-# define FMT_INC(T) (((sizeof(# T) - 1ull) << 32) - T)
+# define FMT_INC(T) (((sizeof(#T) - 1ull) << 32) - T)
static constexpr uint64_t table[] = {
FMT_INC(0), FMT_INC(0), FMT_INC(0), // 8
FMT_INC(10), FMT_INC(10), FMT_INC(10), // 64
return count_digits_fallback(n);
}
-template <typename Int> constexpr auto digits10() FMT_NOEXCEPT -> int {
+template <typename Int> constexpr auto digits10() noexcept -> int {
return std::numeric_limits<Int>::digits10;
}
-template <> constexpr auto digits10<int128_t>() FMT_NOEXCEPT -> int {
- return 38;
-}
-template <> constexpr auto digits10<uint128_t>() FMT_NOEXCEPT -> int {
- return 38;
-}
+template <> constexpr auto digits10<int128_opt>() noexcept -> int { return 38; }
+template <> constexpr auto digits10<uint128_t>() noexcept -> int { return 38; }
template <typename Char> struct thousands_sep_result {
std::string grouping;
template <typename Char, typename UInt, typename Iterator,
FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
-inline auto format_decimal(Iterator out, UInt value, int size)
+FMT_CONSTEXPR inline auto format_decimal(Iterator out, UInt value, int size)
-> format_decimal_result<Iterator> {
// Buffer is large enough to hold all digits (digits10 + 1).
- Char buffer[digits10<UInt>() + 1];
+ Char buffer[digits10<UInt>() + 1] = {};
auto end = format_decimal(buffer, value, size).end;
return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
}
Char* end = buffer;
do {
const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
- unsigned digit = (value & ((1 << BASE_BITS) - 1));
+ unsigned digit = static_cast<unsigned>(value & ((1 << BASE_BITS) - 1));
*--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
: digits[digit]);
} while ((value >>= BASE_BITS) != 0);
return end;
}
-template <unsigned BASE_BITS, typename Char>
-auto format_uint(Char* buffer, detail::fallback_uintptr n, int num_digits,
- bool = false) -> Char* {
- auto char_digits = std::numeric_limits<unsigned char>::digits / 4;
- int start = (num_digits + char_digits - 1) / char_digits - 1;
- if (int start_digits = num_digits % char_digits) {
- unsigned value = n.value[start--];
- buffer = format_uint<BASE_BITS>(buffer, value, start_digits);
- }
- for (; start >= 0; --start) {
- unsigned value = n.value[start];
- buffer += char_digits;
- auto p = buffer;
- for (int i = 0; i < char_digits; ++i) {
- unsigned digit = (value & ((1 << BASE_BITS) - 1));
- *--p = static_cast<Char>("0123456789abcdef"[digit]);
- value >>= BASE_BITS;
- }
- }
- return buffer;
-}
-
template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
inline auto format_uint(It out, UInt value, int num_digits, bool upper = false)
-> It {
auto str() const -> std::wstring { return {&buffer_[0], size()}; }
};
+enum class to_utf8_error_policy { abort, replace };
+
+// A converter from UTF-16/UTF-32 (host endian) to UTF-8.
+template <typename WChar, typename Buffer = memory_buffer> class to_utf8 {
+ private:
+ Buffer buffer_;
+
+ public:
+ to_utf8() {}
+ explicit to_utf8(basic_string_view<WChar> s,
+ to_utf8_error_policy policy = to_utf8_error_policy::abort) {
+ static_assert(sizeof(WChar) == 2 || sizeof(WChar) == 4,
+ "Expect utf16 or utf32");
+ if (!convert(s, policy))
+ FMT_THROW(std::runtime_error(sizeof(WChar) == 2 ? "invalid utf16"
+ : "invalid utf32"));
+ }
+ operator string_view() const { return string_view(&buffer_[0], size()); }
+ size_t size() const { return buffer_.size() - 1; }
+ const char* c_str() const { return &buffer_[0]; }
+ std::string str() const { return std::string(&buffer_[0], size()); }
+
+ // Performs conversion returning a bool instead of throwing exception on
+ // conversion error. This method may still throw in case of memory allocation
+ // error.
+ bool convert(basic_string_view<WChar> s,
+ to_utf8_error_policy policy = to_utf8_error_policy::abort) {
+ if (!convert(buffer_, s, policy)) return false;
+ buffer_.push_back(0);
+ return true;
+ }
+ static bool convert(
+ Buffer& buf, basic_string_view<WChar> s,
+ to_utf8_error_policy policy = to_utf8_error_policy::abort) {
+ for (auto p = s.begin(); p != s.end(); ++p) {
+ uint32_t c = static_cast<uint32_t>(*p);
+ if (sizeof(WChar) == 2 && c >= 0xd800 && c <= 0xdfff) {
+ // Handle a surrogate pair.
+ ++p;
+ if (p == s.end() || (c & 0xfc00) != 0xd800 || (*p & 0xfc00) != 0xdc00) {
+ if (policy == to_utf8_error_policy::abort) return false;
+ buf.append(string_view("�"));
+ --p;
+ } else {
+ c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
+ }
+ } else if (c < 0x80) {
+ buf.push_back(static_cast<char>(c));
+ } else if (c < 0x800) {
+ buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
+ buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+ } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
+ buf.push_back(static_cast<char>(0xe0 | (c >> 12)));
+ buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+ buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+ } else if (c >= 0x10000 && c <= 0x10ffff) {
+ buf.push_back(static_cast<char>(0xf0 | (c >> 18)));
+ buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
+ buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+ buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+ } else {
+ return false;
+ }
+ }
+ return true;
+ }
+};
+
+// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
+inline uint128_fallback umul128(uint64_t x, uint64_t y) noexcept {
+#if FMT_USE_INT128
+ auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
+ return {static_cast<uint64_t>(p >> 64), static_cast<uint64_t>(p)};
+#elif defined(_MSC_VER) && defined(_M_X64)
+ auto result = uint128_fallback();
+ result.lo_ = _umul128(x, y, &result.hi_);
+ return result;
+#else
+ const uint64_t mask = static_cast<uint64_t>(max_value<uint32_t>());
+
+ uint64_t a = x >> 32;
+ uint64_t b = x & mask;
+ uint64_t c = y >> 32;
+ uint64_t d = y & mask;
+
+ uint64_t ac = a * c;
+ uint64_t bc = b * c;
+ uint64_t ad = a * d;
+ uint64_t bd = b * d;
+
+ uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
+
+ return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
+ (intermediate << 32) + (bd & mask)};
+#endif
+}
+
namespace dragonbox {
+// Computes floor(log10(pow(2, e))) for e in [-2620, 2620] using the method from
+// https://fmt.dev/papers/Dragonbox.pdf#page=28, section 6.1.
+inline int floor_log10_pow2(int e) noexcept {
+ FMT_ASSERT(e <= 2620 && e >= -2620, "too large exponent");
+ static_assert((-1 >> 1) == -1, "right shift is not arithmetic");
+ return (e * 315653) >> 20;
+}
+
+inline int floor_log2_pow10(int e) noexcept {
+ FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
+ return (e * 1741647) >> 19;
+}
+
+// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
+inline uint64_t umul128_upper64(uint64_t x, uint64_t y) noexcept {
+#if FMT_USE_INT128
+ auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
+ return static_cast<uint64_t>(p >> 64);
+#elif defined(_MSC_VER) && defined(_M_X64)
+ return __umulh(x, y);
+#else
+ return umul128(x, y).high();
+#endif
+}
+
+// Computes upper 128 bits of multiplication of a 64-bit unsigned integer and a
+// 128-bit unsigned integer.
+inline uint128_fallback umul192_upper128(uint64_t x,
+ uint128_fallback y) noexcept {
+ uint128_fallback r = umul128(x, y.high());
+ r += umul128_upper64(x, y.low());
+ return r;
+}
+
+FMT_API uint128_fallback get_cached_power(int k) noexcept;
// Type-specific information that Dragonbox uses.
-template <class T> struct float_info;
+template <typename T, typename Enable = void> struct float_info;
template <> struct float_info<float> {
using carrier_uint = uint32_t;
- static const int significand_bits = 23;
static const int exponent_bits = 8;
- static const int min_exponent = -126;
- static const int max_exponent = 127;
- static const int exponent_bias = -127;
- static const int decimal_digits = 9;
static const int kappa = 1;
static const int big_divisor = 100;
static const int small_divisor = 10;
static const int min_k = -31;
static const int max_k = 46;
- static const int cache_bits = 64;
- static const int divisibility_check_by_5_threshold = 39;
- static const int case_fc_pm_half_lower_threshold = -1;
- static const int case_fc_pm_half_upper_threshold = 6;
- static const int case_fc_lower_threshold = -2;
- static const int case_fc_upper_threshold = 6;
- static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
- static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
static const int shorter_interval_tie_lower_threshold = -35;
static const int shorter_interval_tie_upper_threshold = -35;
- static const int max_trailing_zeros = 7;
};
template <> struct float_info<double> {
using carrier_uint = uint64_t;
- static const int significand_bits = 52;
static const int exponent_bits = 11;
- static const int min_exponent = -1022;
- static const int max_exponent = 1023;
- static const int exponent_bias = -1023;
- static const int decimal_digits = 17;
static const int kappa = 2;
static const int big_divisor = 1000;
static const int small_divisor = 100;
static const int min_k = -292;
- static const int max_k = 326;
- static const int cache_bits = 128;
- static const int divisibility_check_by_5_threshold = 86;
- static const int case_fc_pm_half_lower_threshold = -2;
- static const int case_fc_pm_half_upper_threshold = 9;
- static const int case_fc_lower_threshold = -4;
- static const int case_fc_upper_threshold = 9;
- static const int case_shorter_interval_left_endpoint_lower_threshold = 2;
- static const int case_shorter_interval_left_endpoint_upper_threshold = 3;
+ static const int max_k = 341;
static const int shorter_interval_tie_lower_threshold = -77;
static const int shorter_interval_tie_upper_threshold = -77;
- static const int max_trailing_zeros = 16;
+};
+
+// An 80- or 128-bit floating point number.
+template <typename T>
+struct float_info<T, enable_if_t<std::numeric_limits<T>::digits == 64 ||
+ std::numeric_limits<T>::digits == 113 ||
+ is_float128<T>::value>> {
+ using carrier_uint = detail::uint128_t;
+ static const int exponent_bits = 15;
+};
+
+// A double-double floating point number.
+template <typename T>
+struct float_info<T, enable_if_t<is_double_double<T>::value>> {
+ using carrier_uint = detail::uint128_t;
};
template <typename T> struct decimal_fp {
int exponent;
};
-template <typename T>
-FMT_API auto to_decimal(T x) FMT_NOEXCEPT -> decimal_fp<T>;
+template <typename T> FMT_API auto to_decimal(T x) noexcept -> decimal_fp<T>;
} // namespace dragonbox
-template <typename T>
+// Returns true iff Float has the implicit bit which is not stored.
+template <typename Float> constexpr bool has_implicit_bit() {
+ // An 80-bit FP number has a 64-bit significand an no implicit bit.
+ return std::numeric_limits<Float>::digits != 64;
+}
+
+// Returns the number of significand bits stored in Float. The implicit bit is
+// not counted since it is not stored.
+template <typename Float> constexpr int num_significand_bits() {
+ // std::numeric_limits may not support __float128.
+ return is_float128<Float>() ? 112
+ : (std::numeric_limits<Float>::digits -
+ (has_implicit_bit<Float>() ? 1 : 0));
+}
+
+template <typename Float>
constexpr auto exponent_mask() ->
- typename dragonbox::float_info<T>::carrier_uint {
- using uint = typename dragonbox::float_info<T>::carrier_uint;
- return ((uint(1) << dragonbox::float_info<T>::exponent_bits) - 1)
- << dragonbox::float_info<T>::significand_bits;
+ typename dragonbox::float_info<Float>::carrier_uint {
+ using float_uint = typename dragonbox::float_info<Float>::carrier_uint;
+ return ((float_uint(1) << dragonbox::float_info<Float>::exponent_bits) - 1)
+ << num_significand_bits<Float>();
+}
+template <typename Float> constexpr auto exponent_bias() -> int {
+ // std::numeric_limits may not support __float128.
+ return is_float128<Float>() ? 16383
+ : std::numeric_limits<Float>::max_exponent - 1;
}
// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
return it;
}
-template <typename T>
-FMT_HEADER_ONLY_CONSTEXPR20 auto format_float(T value, int precision,
- float_specs specs,
- buffer<char>& buf) -> int;
+// A floating-point number f * pow(2, e) where F is an unsigned type.
+template <typename F> struct basic_fp {
+ F f;
+ int e;
+
+ static constexpr const int num_significand_bits =
+ static_cast<int>(sizeof(F) * num_bits<unsigned char>());
+
+ constexpr basic_fp() : f(0), e(0) {}
+ constexpr basic_fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
+
+ // Constructs fp from an IEEE754 floating-point number.
+ template <typename Float> FMT_CONSTEXPR basic_fp(Float n) { assign(n); }
+
+ // Assigns n to this and return true iff predecessor is closer than successor.
+ template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
+ FMT_CONSTEXPR auto assign(Float n) -> bool {
+ static_assert(std::numeric_limits<Float>::digits <= 113, "unsupported FP");
+ // Assume Float is in the format [sign][exponent][significand].
+ using carrier_uint = typename dragonbox::float_info<Float>::carrier_uint;
+ const auto num_float_significand_bits =
+ detail::num_significand_bits<Float>();
+ const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
+ const auto significand_mask = implicit_bit - 1;
+ auto u = bit_cast<carrier_uint>(n);
+ f = static_cast<F>(u & significand_mask);
+ auto biased_e = static_cast<int>((u & exponent_mask<Float>()) >>
+ num_float_significand_bits);
+ // The predecessor is closer if n is a normalized power of 2 (f == 0)
+ // other than the smallest normalized number (biased_e > 1).
+ auto is_predecessor_closer = f == 0 && biased_e > 1;
+ if (biased_e == 0)
+ biased_e = 1; // Subnormals use biased exponent 1 (min exponent).
+ else if (has_implicit_bit<Float>())
+ f += static_cast<F>(implicit_bit);
+ e = biased_e - exponent_bias<Float>() - num_float_significand_bits;
+ if (!has_implicit_bit<Float>()) ++e;
+ return is_predecessor_closer;
+ }
-// Formats a floating-point number with snprintf.
-template <typename T>
-auto snprintf_float(T value, int precision, float_specs specs,
- buffer<char>& buf) -> int;
+ template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
+ FMT_CONSTEXPR auto assign(Float n) -> bool {
+ static_assert(std::numeric_limits<double>::is_iec559, "unsupported FP");
+ return assign(static_cast<double>(n));
+ }
+};
-template <typename T> constexpr auto promote_float(T value) -> T {
+using fp = basic_fp<unsigned long long>;
+
+// Normalizes the value converted from double and multiplied by (1 << SHIFT).
+template <int SHIFT = 0, typename F>
+FMT_CONSTEXPR basic_fp<F> normalize(basic_fp<F> value) {
+ // Handle subnormals.
+ const auto implicit_bit = F(1) << num_significand_bits<double>();
+ const auto shifted_implicit_bit = implicit_bit << SHIFT;
+ while ((value.f & shifted_implicit_bit) == 0) {
+ value.f <<= 1;
+ --value.e;
+ }
+ // Subtract 1 to account for hidden bit.
+ const auto offset = basic_fp<F>::num_significand_bits -
+ num_significand_bits<double>() - SHIFT - 1;
+ value.f <<= offset;
+ value.e -= offset;
return value;
}
-constexpr auto promote_float(float value) -> double {
- return static_cast<double>(value);
+
+// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
+FMT_CONSTEXPR inline uint64_t multiply(uint64_t lhs, uint64_t rhs) {
+#if FMT_USE_INT128
+ auto product = static_cast<__uint128_t>(lhs) * rhs;
+ auto f = static_cast<uint64_t>(product >> 64);
+ return (static_cast<uint64_t>(product) & (1ULL << 63)) != 0 ? f + 1 : f;
+#else
+ // Multiply 32-bit parts of significands.
+ uint64_t mask = (1ULL << 32) - 1;
+ uint64_t a = lhs >> 32, b = lhs & mask;
+ uint64_t c = rhs >> 32, d = rhs & mask;
+ uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
+ // Compute mid 64-bit of result and round.
+ uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
+ return ac + (ad >> 32) + (bc >> 32) + (mid >> 32);
+#endif
+}
+
+FMT_CONSTEXPR inline fp operator*(fp x, fp y) {
+ return {multiply(x.f, y.f), x.e + y.e + 64};
+}
+
+template <typename T = void> struct basic_data {
+ // For checking rounding thresholds.
+ // The kth entry is chosen to be the smallest integer such that the
+ // upper 32-bits of 10^(k+1) times it is strictly bigger than 5 * 10^k.
+ static constexpr uint32_t fractional_part_rounding_thresholds[8] = {
+ 2576980378U, // ceil(2^31 + 2^32/10^1)
+ 2190433321U, // ceil(2^31 + 2^32/10^2)
+ 2151778616U, // ceil(2^31 + 2^32/10^3)
+ 2147913145U, // ceil(2^31 + 2^32/10^4)
+ 2147526598U, // ceil(2^31 + 2^32/10^5)
+ 2147487943U, // ceil(2^31 + 2^32/10^6)
+ 2147484078U, // ceil(2^31 + 2^32/10^7)
+ 2147483691U // ceil(2^31 + 2^32/10^8)
+ };
+};
+// This is a struct rather than an alias to avoid shadowing warnings in gcc.
+struct data : basic_data<> {};
+
+#if FMT_CPLUSPLUS < 201703L
+template <typename T>
+constexpr uint32_t basic_data<T>::fractional_part_rounding_thresholds[];
+#endif
+
+template <typename T, bool doublish = num_bits<T>() == num_bits<double>()>
+using convert_float_result =
+ conditional_t<std::is_same<T, float>::value || doublish, double, T>;
+
+template <typename T>
+constexpr auto convert_float(T value) -> convert_float_result<T> {
+ return static_cast<convert_float_result<T>>(value);
}
template <typename OutputIt, typename Char>
// width: output display width in (terminal) column positions.
template <align::type align = align::left, typename OutputIt, typename Char,
typename F>
-FMT_CONSTEXPR auto write_padded(OutputIt out,
- const basic_format_specs<Char>& specs,
+FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs<Char>& specs,
size_t size, size_t width, F&& f) -> OutputIt {
static_assert(align == align::left || align == align::right, "");
unsigned spec_width = to_unsigned(specs.width);
template <align::type align = align::left, typename OutputIt, typename Char,
typename F>
-constexpr auto write_padded(OutputIt out, const basic_format_specs<Char>& specs,
+constexpr auto write_padded(OutputIt out, const format_specs<Char>& specs,
size_t size, F&& f) -> OutputIt {
return write_padded<align>(out, specs, size, size, f);
}
template <align::type align = align::left, typename Char, typename OutputIt>
FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
- const basic_format_specs<Char>& specs)
- -> OutputIt {
+ const format_specs<Char>& specs) -> OutputIt {
return write_padded<align>(
out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
const char* data = bytes.data();
}
template <typename Char, typename OutputIt, typename UIntPtr>
-auto write_ptr(OutputIt out, UIntPtr value,
- const basic_format_specs<Char>* specs) -> OutputIt {
+auto write_ptr(OutputIt out, UIntPtr value, const format_specs<Char>* specs)
+ -> OutputIt {
int num_digits = count_digits<4>(value);
auto size = to_unsigned(num_digits) + size_t(2);
auto write = [=](reserve_iterator<OutputIt> it) {
: base_iterator(out, write(reserve(out, size)));
}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
- const basic_format_specs<Char>& specs)
- -> OutputIt {
- return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
- *it++ = value;
- return it;
- });
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value,
- const basic_format_specs<Char>& specs,
- locale_ref loc = {}) -> OutputIt {
- return check_char_specs(specs)
- ? write_char(out, value, specs)
- : write(out, static_cast<int>(value), specs, loc);
+// Returns true iff the code point cp is printable.
+FMT_API auto is_printable(uint32_t cp) -> bool;
+
+inline auto needs_escape(uint32_t cp) -> bool {
+ return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
+ !is_printable(cp);
}
-// 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 {
+template <typename Char> struct find_escape_result {
+ const Char* begin;
+ const Char* end;
+ uint32_t cp;
+};
+
+template <typename Char>
+using make_unsigned_char =
+ typename conditional_t<std::is_integral<Char>::value,
+ std::make_unsigned<Char>,
+ type_identity<uint32_t>>::type;
+
+template <typename Char>
+auto find_escape(const Char* begin, const Char* end)
+ -> find_escape_result<Char> {
+ for (; begin != end; ++begin) {
+ uint32_t cp = static_cast<make_unsigned_char<Char>>(*begin);
+ if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue;
+ if (needs_escape(cp)) return {begin, begin + 1, cp};
+ }
+ return {begin, nullptr, 0};
+}
+
+inline auto find_escape(const char* begin, const char* end)
+ -> find_escape_result<char> {
+ if (!is_utf8()) return find_escape<char>(begin, end);
+ auto result = find_escape_result<char>{end, nullptr, 0};
+ for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
+ [&](uint32_t cp, string_view sv) {
+ if (needs_escape(cp)) {
+ result = {sv.begin(), sv.end(), cp};
+ return false;
+ }
+ return true;
+ });
+ return result;
+}
+
+#define FMT_STRING_IMPL(s, base, explicit) \
+ [] { \
+ /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
+ /* Use a macro-like name to avoid shadowing warnings. */ \
+ struct FMT_VISIBILITY("hidden") FMT_COMPILE_STRING : base { \
+ using char_type FMT_MAYBE_UNUSED = fmt::remove_cvref_t<decltype(s[0])>; \
+ FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \
+ operator fmt::basic_string_view<char_type>() const { \
+ return fmt::detail_exported::compile_string_to_view<char_type>(s); \
+ } \
+ }; \
+ return FMT_COMPILE_STRING(); \
+ }()
+
+/**
+ \rst
+ Constructs a compile-time format string from a string literal *s*.
+
+ **Example**::
+
+ // A compile-time error because 'd' is an invalid specifier for strings.
+ std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
+ \endrst
+ */
+#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, )
+
+template <size_t width, typename Char, typename OutputIt>
+auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt {
+ *out++ = static_cast<Char>('\\');
+ *out++ = static_cast<Char>(prefix);
+ Char buf[width];
+ fill_n(buf, width, static_cast<Char>('0'));
+ format_uint<4>(buf, cp, width);
+ return copy_str<Char>(buf, buf + width, out);
+}
+
+template <typename OutputIt, typename Char>
+auto write_escaped_cp(OutputIt out, const find_escape_result<Char>& escape)
+ -> OutputIt {
+ auto c = static_cast<Char>(escape.cp);
+ switch (escape.cp) {
+ case '\n':
+ *out++ = static_cast<Char>('\\');
+ c = static_cast<Char>('n');
+ break;
+ case '\r':
+ *out++ = static_cast<Char>('\\');
+ c = static_cast<Char>('r');
+ break;
+ case '\t':
+ *out++ = static_cast<Char>('\\');
+ c = static_cast<Char>('t');
+ break;
+ case '"':
+ FMT_FALLTHROUGH;
+ case '\'':
+ FMT_FALLTHROUGH;
+ case '\\':
+ *out++ = static_cast<Char>('\\');
+ break;
+ default:
+ if (escape.cp < 0x100) {
+ return write_codepoint<2, Char>(out, 'x', escape.cp);
+ }
+ if (escape.cp < 0x10000) {
+ return write_codepoint<4, Char>(out, 'u', escape.cp);
+ }
+ if (escape.cp < 0x110000) {
+ return write_codepoint<8, Char>(out, 'U', escape.cp);
+ }
+ for (Char escape_char : basic_string_view<Char>(
+ escape.begin, to_unsigned(escape.end - escape.begin))) {
+ out = write_codepoint<2, Char>(out, 'x',
+ static_cast<uint32_t>(escape_char) & 0xFF);
+ }
+ return out;
+ }
+ *out++ = c;
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+auto write_escaped_string(OutputIt out, basic_string_view<Char> str)
+ -> OutputIt {
+ *out++ = static_cast<Char>('"');
+ auto begin = str.begin(), end = str.end();
+ do {
+ auto escape = find_escape(begin, end);
+ out = copy_str<Char>(begin, escape.begin, out);
+ begin = escape.end;
+ if (!begin) break;
+ out = write_escaped_cp<OutputIt, Char>(out, escape);
+ } while (begin != end);
+ *out++ = static_cast<Char>('"');
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+auto write_escaped_char(OutputIt out, Char v) -> OutputIt {
+ *out++ = static_cast<Char>('\'');
+ if ((needs_escape(static_cast<uint32_t>(v)) && v != static_cast<Char>('"')) ||
+ v == static_cast<Char>('\'')) {
+ out = write_escaped_cp(
+ out, find_escape_result<Char>{&v, &v + 1, static_cast<uint32_t>(v)});
+ } else {
+ *out++ = v;
+ }
+ *out++ = static_cast<Char>('\'');
+ return out;
+}
+
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
+ const format_specs<Char>& specs) -> OutputIt {
+ bool is_debug = specs.type == presentation_type::debug;
+ return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
+ if (is_debug) return write_escaped_char(it, value);
+ *it++ = value;
+ return it;
+ });
+}
+template <typename Char, typename OutputIt>
+FMT_CONSTEXPR auto write(OutputIt out, Char value,
+ const format_specs<Char>& specs, locale_ref loc = {})
+ -> OutputIt {
+ // char is formatted as unsigned char for consistency across platforms.
+ using unsigned_type =
+ conditional_t<std::is_same<Char, char>::value, unsigned char, unsigned>;
+ return check_char_specs(specs)
+ ? write_char(out, value, specs)
+ : write(out, static_cast<unsigned_type>(value), specs, loc);
+}
+
+// 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;
FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
- const basic_format_specs<Char>& specs)
+ const format_specs<Char>& specs)
: size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
if (specs.align == align::numeric) {
auto width = to_unsigned(specs.width);
template <typename OutputIt, typename Char, typename W>
FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
unsigned prefix,
- const basic_format_specs<Char>& specs,
+ const format_specs<Char>& specs,
W write_digits) -> OutputIt {
// Slightly faster check for specs.width == 0 && specs.precision == -1.
if ((specs.width | (specs.precision + 1)) == 0) {
template <typename Char> class digit_grouping {
private:
- thousands_sep_result<Char> sep_;
+ std::string grouping_;
+ std::basic_string<Char> thousands_sep_;
struct next_state {
std::string::const_iterator group;
int pos;
};
- next_state initial_state() const { return {sep_.grouping.begin(), 0}; }
+ next_state initial_state() const { return {grouping_.begin(), 0}; }
// Returns the next digit group separator position.
int next(next_state& state) const {
- if (!sep_.thousands_sep) return max_value<int>();
- if (state.group == sep_.grouping.end())
- return state.pos += sep_.grouping.back();
+ if (thousands_sep_.empty()) return max_value<int>();
+ if (state.group == grouping_.end()) return state.pos += grouping_.back();
if (*state.group <= 0 || *state.group == max_value<char>())
return max_value<int>();
state.pos += *state.group++;
public:
explicit digit_grouping(locale_ref loc, bool localized = true) {
- if (localized)
- sep_ = thousands_sep<Char>(loc);
- else
- sep_.thousands_sep = Char();
+ if (!localized) return;
+ auto sep = thousands_sep<Char>(loc);
+ grouping_ = sep.grouping;
+ if (sep.thousands_sep) thousands_sep_.assign(1, sep.thousands_sep);
}
- explicit digit_grouping(thousands_sep_result<Char> sep) : sep_(sep) {}
+ digit_grouping(std::string grouping, std::basic_string<Char> sep)
+ : grouping_(std::move(grouping)), thousands_sep_(std::move(sep)) {}
- Char separator() const { return sep_.thousands_sep; }
+ bool has_separator() const { return !thousands_sep_.empty(); }
int count_separators(int num_digits) const {
int count = 0;
for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
i < num_digits; ++i) {
if (num_digits - i == separators[sep_index]) {
- *out++ = separator();
+ out =
+ copy_str<Char>(thousands_sep_.data(),
+ thousands_sep_.data() + thousands_sep_.size(), out);
--sep_index;
}
*out++ = static_cast<Char>(digits[to_unsigned(i)]);
}
};
+// Writes a decimal integer with digit grouping.
template <typename OutputIt, typename UInt, typename Char>
-auto write_int_localized(OutputIt out, UInt value, unsigned prefix,
- const basic_format_specs<Char>& specs,
- const digit_grouping<Char>& grouping) -> OutputIt {
+auto write_int(OutputIt out, UInt value, unsigned prefix,
+ const format_specs<Char>& specs,
+ const digit_grouping<Char>& grouping) -> OutputIt {
static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
int num_digits = count_digits(value);
char digits[40];
grouping.count_separators(num_digits));
return write_padded<align::right>(
out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
- if (prefix != 0) *it++ = static_cast<Char>(prefix);
+ if (prefix != 0) {
+ char sign = static_cast<char>(prefix);
+ *it++ = static_cast<Char>(sign);
+ }
return grouping.apply(it, string_view(digits, to_unsigned(num_digits)));
});
}
-template <typename OutputIt, typename UInt, typename Char>
-auto write_int_localized(OutputIt& out, UInt value, unsigned prefix,
- const basic_format_specs<Char>& specs, locale_ref loc)
- -> bool {
- auto grouping = digit_grouping<Char>(loc);
- out = write_int_localized(out, value, prefix, specs, grouping);
- return true;
+// Writes a localized value.
+FMT_API auto write_loc(appender out, loc_value value,
+ const format_specs<>& specs, locale_ref loc) -> bool;
+template <typename OutputIt, typename Char>
+inline auto write_loc(OutputIt, loc_value, const format_specs<Char>&,
+ locale_ref) -> bool {
+ return false;
}
FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
return {abs_value, prefix};
}
+template <typename Char = char> struct loc_writer {
+ buffer_appender<Char> out;
+ const format_specs<Char>& specs;
+ std::basic_string<Char> sep;
+ std::string grouping;
+ std::basic_string<Char> decimal_point;
+
+ template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
+ auto operator()(T value) -> bool {
+ auto arg = make_write_int_arg(value, specs.sign);
+ write_int(out, static_cast<uint64_or_128_t<T>>(arg.abs_value), arg.prefix,
+ specs, digit_grouping<Char>(grouping, sep));
+ return true;
+ }
+
+ template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
+ auto operator()(T) -> bool {
+ return false;
+ }
+};
+
template <typename Char, typename OutputIt, typename T>
FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
- const basic_format_specs<Char>& specs,
- locale_ref loc) -> OutputIt {
+ const format_specs<Char>& specs,
+ locale_ref) -> OutputIt {
static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
auto abs_value = arg.abs_value;
auto prefix = arg.prefix;
switch (specs.type) {
case presentation_type::none:
case presentation_type::dec: {
- if (specs.localized &&
- write_int_localized(out, static_cast<uint64_or_128_t<T>>(abs_value),
- prefix, specs, loc)) {
- return out;
- }
auto num_digits = count_digits(abs_value);
return write_int(
out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
case presentation_type::chr:
return write_char(out, static_cast<Char>(abs_value), specs);
default:
- throw_format_error("invalid type specifier");
+ throw_format_error("invalid format specifier");
}
return out;
}
template <typename Char, typename OutputIt, typename T>
FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
- OutputIt out, write_int_arg<T> arg, const basic_format_specs<Char>& specs,
+ OutputIt out, write_int_arg<T> arg, const format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
return write_int(out, arg, specs, loc);
}
!std::is_same<T, bool>::value &&
std::is_same<OutputIt, buffer_appender<Char>>::value)>
FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
- const basic_format_specs<Char>& specs,
+ const format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
+ if (specs.localized && write_loc(out, value, specs, loc)) return out;
return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
loc);
}
!std::is_same<T, bool>::value &&
!std::is_same<OutputIt, buffer_appender<Char>>::value)>
FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
- const basic_format_specs<Char>& specs,
+ const format_specs<Char>& specs,
locale_ref loc) -> OutputIt {
+ if (specs.localized && write_loc(out, value, specs, loc)) return out;
return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
}
+// An output iterator that counts the number of objects written to it and
+// discards them.
+class counting_iterator {
+ private:
+ size_t count_;
+
+ public:
+ using iterator_category = std::output_iterator_tag;
+ using difference_type = std::ptrdiff_t;
+ using pointer = void;
+ using reference = void;
+ FMT_UNCHECKED_ITERATOR(counting_iterator);
+
+ struct value_type {
+ template <typename T> FMT_CONSTEXPR void operator=(const T&) {}
+ };
+
+ FMT_CONSTEXPR counting_iterator() : count_(0) {}
+
+ FMT_CONSTEXPR size_t count() const { return count_; }
+
+ FMT_CONSTEXPR counting_iterator& operator++() {
+ ++count_;
+ return *this;
+ }
+ FMT_CONSTEXPR counting_iterator operator++(int) {
+ auto it = *this;
+ ++*this;
+ return it;
+ }
+
+ FMT_CONSTEXPR friend counting_iterator operator+(counting_iterator it,
+ difference_type n) {
+ it.count_ += static_cast<size_t>(n);
+ return it;
+ }
+
+ FMT_CONSTEXPR value_type operator*() const { return {}; }
+};
+
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
- const basic_format_specs<Char>& specs) -> OutputIt {
+ const format_specs<Char>& specs) -> OutputIt {
auto data = s.data();
auto size = s.size();
if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
size = code_point_index(s, to_unsigned(specs.precision));
- auto width =
- specs.width != 0 ? compute_width(basic_string_view<Char>(data, size)) : 0;
+ bool is_debug = specs.type == presentation_type::debug;
+ size_t width = 0;
+ if (specs.width != 0) {
+ if (is_debug)
+ width = write_escaped_string(counting_iterator{}, s).count();
+ else
+ width = compute_width(basic_string_view<Char>(data, size));
+ }
return write_padded(out, specs, size, width,
[=](reserve_iterator<OutputIt> it) {
+ if (is_debug) return write_escaped_string(it, s);
return copy_str<Char>(data, data + size, it);
});
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out,
basic_string_view<type_identity_t<Char>> s,
- const basic_format_specs<Char>& specs, locale_ref)
+ const format_specs<Char>& specs, locale_ref)
-> OutputIt {
- check_string_type_spec(specs.type);
return write(out, s, specs);
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
- const basic_format_specs<Char>& specs, locale_ref)
+ const format_specs<Char>& specs, locale_ref)
-> OutputIt {
- return check_cstring_type_spec(specs.type)
+ return specs.type != presentation_type::pointer
? write(out, basic_string_view<Char>(s), specs, {})
- : write_ptr<Char>(out, to_uintptr(s), &specs);
+ : write_ptr<Char>(out, bit_cast<uintptr_t>(s), &specs);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_integral<T>::value &&
+ !std::is_same<T, bool>::value &&
+ !std::is_same<T, Char>::value)>
+FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
+ auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
+ bool negative = is_negative(value);
+ // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
+ if (negative) abs_value = ~abs_value + 1;
+ int num_digits = count_digits(abs_value);
+ auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
+ auto it = reserve(out, size);
+ if (auto ptr = to_pointer<Char>(it, size)) {
+ if (negative) *ptr++ = static_cast<Char>('-');
+ format_decimal<Char>(ptr, abs_value, num_digits);
+ return out;
+ }
+ if (negative) *it++ = static_cast<Char>('-');
+ it = format_decimal<Char>(it, abs_value, num_digits).end;
+ return base_iterator(out, it);
+}
+
+// DEPRECATED!
+template <typename Char>
+FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
+ format_specs<Char>& specs) -> const Char* {
+ FMT_ASSERT(begin != end, "");
+ auto align = align::none;
+ auto p = begin + code_point_length(begin);
+ if (end - p <= 0) p = begin;
+ for (;;) {
+ switch (to_ascii(*p)) {
+ case '<':
+ align = align::left;
+ break;
+ case '>':
+ align = align::right;
+ break;
+ case '^':
+ align = align::center;
+ break;
+ }
+ if (align != align::none) {
+ if (p != begin) {
+ auto c = *begin;
+ if (c == '}') return begin;
+ if (c == '{') {
+ throw_format_error("invalid fill character '{'");
+ return begin;
+ }
+ specs.fill = {begin, to_unsigned(p - begin)};
+ begin = p + 1;
+ } else {
+ ++begin;
+ }
+ break;
+ } else if (p == begin) {
+ break;
+ }
+ p = begin;
+ }
+ specs.align = align;
+ return begin;
+}
+
+// A floating-point presentation format.
+enum class float_format : unsigned char {
+ general, // General: exponent notation or fixed point based on magnitude.
+ exp, // Exponent notation with the default precision of 6, e.g. 1.2e-3.
+ fixed, // Fixed point with the default precision of 6, e.g. 0.0012.
+ hex
+};
+
+struct float_specs {
+ int precision;
+ float_format format : 8;
+ sign_t sign : 8;
+ bool upper : 1;
+ bool locale : 1;
+ bool binary32 : 1;
+ bool showpoint : 1;
+};
+
+template <typename ErrorHandler = error_handler, typename Char>
+FMT_CONSTEXPR auto parse_float_type_spec(const format_specs<Char>& specs,
+ ErrorHandler&& eh = {})
+ -> float_specs {
+ auto result = float_specs();
+ result.showpoint = specs.alt;
+ result.locale = specs.localized;
+ switch (specs.type) {
+ case presentation_type::none:
+ result.format = float_format::general;
+ break;
+ case presentation_type::general_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::general_lower:
+ result.format = float_format::general;
+ break;
+ case presentation_type::exp_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::exp_lower:
+ result.format = float_format::exp;
+ result.showpoint |= specs.precision != 0;
+ break;
+ case presentation_type::fixed_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::fixed_lower:
+ result.format = float_format::fixed;
+ result.showpoint |= specs.precision != 0;
+ break;
+ case presentation_type::hexfloat_upper:
+ result.upper = true;
+ FMT_FALLTHROUGH;
+ case presentation_type::hexfloat_lower:
+ result.format = float_format::hex;
+ break;
+ default:
+ eh.on_error("invalid format specifier");
+ break;
+ }
+ return result;
}
template <typename Char, typename OutputIt>
-FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isinf,
- basic_format_specs<Char> specs,
+FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan,
+ format_specs<Char> specs,
const float_specs& fspecs) -> OutputIt {
auto str =
- isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
+ isnan ? (fspecs.upper ? "NAN" : "nan") : (fspecs.upper ? "INF" : "inf");
constexpr size_t str_size = 3;
auto sign = fspecs.sign;
auto size = str_size + (sign ? 1 : 0);
int exponent;
};
-constexpr auto get_significand_size(const big_decimal_fp& fp) -> int {
- return fp.significand_size;
+constexpr auto get_significand_size(const big_decimal_fp& f) -> int {
+ return f.significand_size;
}
template <typename T>
-inline auto get_significand_size(const dragonbox::decimal_fp<T>& fp) -> int {
- return count_digits(fp.significand);
+inline auto get_significand_size(const dragonbox::decimal_fp<T>& f) -> int {
+ return count_digits(f.significand);
}
template <typename Char, typename OutputIt>
FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
int significand_size, int exponent,
const Grouping& grouping) -> OutputIt {
- if (!grouping.separator()) {
+ if (!grouping.has_separator()) {
out = write_significand<Char>(out, significand, significand_size);
return detail::fill_n(out, exponent, static_cast<Char>('0'));
}
int floating_size = significand_size - integral_size;
for (int i = floating_size / 2; i > 0; --i) {
out -= 2;
- copy2(out, digits2(significand % 100));
+ copy2(out, digits2(static_cast<std::size_t>(significand % 100)));
significand /= 100;
}
if (floating_size % 2 != 0) {
int significand_size, int integral_size,
Char decimal_point,
const Grouping& grouping) -> OutputIt {
- if (!grouping.separator()) {
+ if (!grouping.has_separator()) {
return write_significand(out, significand, significand_size, integral_size,
decimal_point);
}
template <typename OutputIt, typename DecimalFP, typename Char,
typename Grouping = digit_grouping<Char>>
-FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& fp,
- const basic_format_specs<Char>& specs,
+FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& f,
+ const format_specs<Char>& specs,
float_specs fspecs, locale_ref loc)
-> OutputIt {
- auto significand = fp.significand;
- int significand_size = get_significand_size(fp);
- constexpr Char zero = static_cast<Char>('0');
+ auto significand = f.significand;
+ int significand_size = get_significand_size(f);
+ const Char zero = static_cast<Char>('0');
auto sign = fspecs.sign;
size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
using iterator = reserve_iterator<OutputIt>;
Char decimal_point =
fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
- int output_exp = fp.exponent + significand_size - 1;
+ int output_exp = f.exponent + significand_size - 1;
auto use_exp_format = [=]() {
if (fspecs.format == float_format::exp) return true;
if (fspecs.format != float_format::general) return false;
: base_iterator(out, write(reserve(out, size)));
}
- int exp = fp.exponent + significand_size;
- if (fp.exponent >= 0) {
+ int exp = f.exponent + significand_size;
+ if (f.exponent >= 0) {
// 1234e5 -> 123400000[.0+]
- size += to_unsigned(fp.exponent);
+ size += to_unsigned(f.exponent);
int num_zeros = fspecs.precision - exp;
-#ifdef FMT_FUZZ
- if (num_zeros > 5000)
- throw std::runtime_error("fuzz mode - avoiding excessive cpu use");
-#endif
+ abort_fuzzing_if(num_zeros > 5000);
if (fspecs.showpoint) {
- if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 1;
- if (num_zeros > 0) size += to_unsigned(num_zeros) + 1;
+ ++size;
+ if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 0;
+ if (num_zeros > 0) size += to_unsigned(num_zeros);
}
auto grouping = Grouping(loc, fspecs.locale);
- size += to_unsigned(grouping.count_separators(significand_size));
+ size += to_unsigned(grouping.count_separators(exp));
return write_padded<align::right>(out, specs, size, [&](iterator it) {
if (sign) *it++ = detail::sign<Char>(sign);
it = write_significand<Char>(it, significand, significand_size,
- fp.exponent, grouping);
+ f.exponent, grouping);
if (!fspecs.showpoint) return it;
*it++ = decimal_point;
return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
auto grouping = Grouping(loc, fspecs.locale);
- size += to_unsigned(grouping.count_separators(significand_size));
+ size += to_unsigned(grouping.count_separators(exp));
return write_padded<align::right>(out, specs, size, [&](iterator it) {
if (sign) *it++ = detail::sign<Char>(sign);
it = write_significand(it, significand, significand_size, exp,
public:
constexpr fallback_digit_grouping(locale_ref, bool) {}
- constexpr Char separator() const { return Char(); }
+ constexpr bool has_separator() const { return false; }
constexpr int count_separators(int) const { return 0; }
};
template <typename OutputIt, typename DecimalFP, typename Char>
-FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& fp,
- const basic_format_specs<Char>& specs,
+FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& f,
+ const format_specs<Char>& specs,
float_specs fspecs, locale_ref loc)
-> OutputIt {
if (is_constant_evaluated()) {
return do_write_float<OutputIt, DecimalFP, Char,
- fallback_digit_grouping<Char>>(out, fp, specs, fspecs,
+ fallback_digit_grouping<Char>>(out, f, specs, fspecs,
loc);
} else {
- return do_write_float(out, fp, specs, fspecs, loc);
+ return do_write_float(out, f, specs, fspecs, loc);
}
}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR20 bool isinf(T value) {
- if (is_constant_evaluated()) {
-#if defined(__cpp_if_constexpr)
- if constexpr (std::numeric_limits<double>::is_iec559) {
- auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
- constexpr auto significand_bits =
- dragonbox::float_info<double>::significand_bits;
- return (bits & exponent_mask<double>()) &&
- !(bits & ((uint64_t(1) << significand_bits) - 1));
- }
-#endif
- }
- return std::isinf(value);
+template <typename T> constexpr bool isnan(T value) {
+ return !(value >= value); // std::isnan doesn't support __float128.
}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+template <typename T, typename Enable = void>
+struct has_isfinite : std::false_type {};
+
+template <typename T>
+struct has_isfinite<T, enable_if_t<sizeof(std::isfinite(T())) != 0>>
+ : std::true_type {};
+
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value&&
+ has_isfinite<T>::value)>
FMT_CONSTEXPR20 bool isfinite(T value) {
- if (is_constant_evaluated()) {
-#if defined(__cpp_if_constexpr)
- if constexpr (std::numeric_limits<double>::is_iec559) {
- auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
- return (bits & exponent_mask<double>()) != exponent_mask<double>();
- }
-#endif
- }
+ constexpr T inf = T(std::numeric_limits<double>::infinity());
+ if (is_constant_evaluated())
+ return !detail::isnan(value) && value < inf && value > -inf;
return std::isfinite(value);
}
+template <typename T, FMT_ENABLE_IF(!has_isfinite<T>::value)>
+FMT_CONSTEXPR bool isfinite(T value) {
+ T inf = T(std::numeric_limits<double>::infinity());
+ // std::isfinite doesn't support __float128.
+ return !detail::isnan(value) && value < inf && value > -inf;
+}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+template <typename T, FMT_ENABLE_IF(is_floating_point<T>::value)>
FMT_INLINE FMT_CONSTEXPR bool signbit(T value) {
if (is_constant_evaluated()) {
#ifdef __cpp_if_constexpr
if constexpr (std::numeric_limits<double>::is_iec559) {
auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
- return (bits & (uint64_t(1) << (num_bits<uint64_t>() - 1))) != 0;
+ return (bits >> (num_bits<uint64_t>() - 1)) != 0;
}
#endif
}
- return std::signbit(value);
+ return std::signbit(static_cast<double>(value));
}
-template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-FMT_CONSTEXPR20 auto write(OutputIt out, T value,
- basic_format_specs<Char> specs, locale_ref loc = {})
+inline FMT_CONSTEXPR20 void adjust_precision(int& precision, int exp10) {
+ // Adjust fixed precision by exponent because it is relative to decimal
+ // point.
+ if (exp10 > 0 && precision > max_value<int>() - exp10)
+ FMT_THROW(format_error("number is too big"));
+ precision += exp10;
+}
+
+class bigint {
+ private:
+ // A bigint is stored as an array of bigits (big digits), with bigit at index
+ // 0 being the least significant one.
+ using bigit = uint32_t;
+ using double_bigit = uint64_t;
+ enum { bigits_capacity = 32 };
+ basic_memory_buffer<bigit, bigits_capacity> bigits_;
+ int exp_;
+
+ FMT_CONSTEXPR20 bigit operator[](int index) const {
+ return bigits_[to_unsigned(index)];
+ }
+ FMT_CONSTEXPR20 bigit& operator[](int index) {
+ return bigits_[to_unsigned(index)];
+ }
+
+ static constexpr const int bigit_bits = num_bits<bigit>();
+
+ friend struct formatter<bigint>;
+
+ FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
+ auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
+ (*this)[index] = static_cast<bigit>(result);
+ borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
+ }
+
+ FMT_CONSTEXPR20 void remove_leading_zeros() {
+ int num_bigits = static_cast<int>(bigits_.size()) - 1;
+ while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
+ bigits_.resize(to_unsigned(num_bigits + 1));
+ }
+
+ // Computes *this -= other assuming aligned bigints and *this >= other.
+ FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
+ FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
+ FMT_ASSERT(compare(*this, other) >= 0, "");
+ bigit borrow = 0;
+ int i = other.exp_ - exp_;
+ for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
+ subtract_bigits(i, other.bigits_[j], borrow);
+ while (borrow > 0) subtract_bigits(i, 0, borrow);
+ remove_leading_zeros();
+ }
+
+ FMT_CONSTEXPR20 void multiply(uint32_t value) {
+ const double_bigit wide_value = value;
+ bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ double_bigit result = bigits_[i] * wide_value + carry;
+ bigits_[i] = static_cast<bigit>(result);
+ carry = static_cast<bigit>(result >> bigit_bits);
+ }
+ if (carry != 0) bigits_.push_back(carry);
+ }
+
+ template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
+ std::is_same<UInt, uint128_t>::value)>
+ FMT_CONSTEXPR20 void multiply(UInt value) {
+ using half_uint =
+ conditional_t<std::is_same<UInt, uint128_t>::value, uint64_t, uint32_t>;
+ const int shift = num_bits<half_uint>() - bigit_bits;
+ const UInt lower = static_cast<half_uint>(value);
+ const UInt upper = value >> num_bits<half_uint>();
+ UInt carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ UInt result = lower * bigits_[i] + static_cast<bigit>(carry);
+ carry = (upper * bigits_[i] << shift) + (result >> bigit_bits) +
+ (carry >> bigit_bits);
+ bigits_[i] = static_cast<bigit>(result);
+ }
+ while (carry != 0) {
+ bigits_.push_back(static_cast<bigit>(carry));
+ carry >>= bigit_bits;
+ }
+ }
+
+ template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
+ std::is_same<UInt, uint128_t>::value)>
+ FMT_CONSTEXPR20 void assign(UInt n) {
+ size_t num_bigits = 0;
+ do {
+ bigits_[num_bigits++] = static_cast<bigit>(n);
+ n >>= bigit_bits;
+ } while (n != 0);
+ bigits_.resize(num_bigits);
+ exp_ = 0;
+ }
+
+ public:
+ FMT_CONSTEXPR20 bigint() : exp_(0) {}
+ explicit bigint(uint64_t n) { assign(n); }
+
+ bigint(const bigint&) = delete;
+ void operator=(const bigint&) = delete;
+
+ FMT_CONSTEXPR20 void assign(const bigint& other) {
+ auto size = other.bigits_.size();
+ bigits_.resize(size);
+ auto data = other.bigits_.data();
+ copy_str<bigit>(data, data + size, bigits_.data());
+ exp_ = other.exp_;
+ }
+
+ template <typename Int> FMT_CONSTEXPR20 void operator=(Int n) {
+ FMT_ASSERT(n > 0, "");
+ assign(uint64_or_128_t<Int>(n));
+ }
+
+ FMT_CONSTEXPR20 int num_bigits() const {
+ return static_cast<int>(bigits_.size()) + exp_;
+ }
+
+ FMT_NOINLINE FMT_CONSTEXPR20 bigint& operator<<=(int shift) {
+ FMT_ASSERT(shift >= 0, "");
+ exp_ += shift / bigit_bits;
+ shift %= bigit_bits;
+ if (shift == 0) return *this;
+ bigit carry = 0;
+ for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
+ bigit c = bigits_[i] >> (bigit_bits - shift);
+ bigits_[i] = (bigits_[i] << shift) + carry;
+ carry = c;
+ }
+ if (carry != 0) bigits_.push_back(carry);
+ return *this;
+ }
+
+ template <typename Int> FMT_CONSTEXPR20 bigint& operator*=(Int value) {
+ FMT_ASSERT(value > 0, "");
+ multiply(uint32_or_64_or_128_t<Int>(value));
+ return *this;
+ }
+
+ friend FMT_CONSTEXPR20 int compare(const bigint& lhs, const bigint& rhs) {
+ int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
+ if (num_lhs_bigits != num_rhs_bigits)
+ return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
+ int i = static_cast<int>(lhs.bigits_.size()) - 1;
+ int j = static_cast<int>(rhs.bigits_.size()) - 1;
+ int end = i - j;
+ if (end < 0) end = 0;
+ for (; i >= end; --i, --j) {
+ bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
+ if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
+ }
+ if (i != j) return i > j ? 1 : -1;
+ return 0;
+ }
+
+ // Returns compare(lhs1 + lhs2, rhs).
+ friend FMT_CONSTEXPR20 int add_compare(const bigint& lhs1, const bigint& lhs2,
+ const bigint& rhs) {
+ auto minimum = [](int a, int b) { return a < b ? a : b; };
+ auto maximum = [](int a, int b) { return a > b ? a : b; };
+ int max_lhs_bigits = maximum(lhs1.num_bigits(), lhs2.num_bigits());
+ int num_rhs_bigits = rhs.num_bigits();
+ if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
+ if (max_lhs_bigits > num_rhs_bigits) return 1;
+ auto get_bigit = [](const bigint& n, int i) -> bigit {
+ return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
+ };
+ double_bigit borrow = 0;
+ int min_exp = minimum(minimum(lhs1.exp_, lhs2.exp_), rhs.exp_);
+ for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
+ double_bigit sum =
+ static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
+ bigit rhs_bigit = get_bigit(rhs, i);
+ if (sum > rhs_bigit + borrow) return 1;
+ borrow = rhs_bigit + borrow - sum;
+ if (borrow > 1) return -1;
+ borrow <<= bigit_bits;
+ }
+ return borrow != 0 ? -1 : 0;
+ }
+
+ // Assigns pow(10, exp) to this bigint.
+ FMT_CONSTEXPR20 void assign_pow10(int exp) {
+ FMT_ASSERT(exp >= 0, "");
+ if (exp == 0) return *this = 1;
+ // Find the top bit.
+ int bitmask = 1;
+ while (exp >= bitmask) bitmask <<= 1;
+ bitmask >>= 1;
+ // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
+ // repeated squaring and multiplication.
+ *this = 5;
+ bitmask >>= 1;
+ while (bitmask != 0) {
+ square();
+ if ((exp & bitmask) != 0) *this *= 5;
+ bitmask >>= 1;
+ }
+ *this <<= exp; // Multiply by pow(2, exp) by shifting.
+ }
+
+ FMT_CONSTEXPR20 void square() {
+ int num_bigits = static_cast<int>(bigits_.size());
+ int num_result_bigits = 2 * num_bigits;
+ basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
+ bigits_.resize(to_unsigned(num_result_bigits));
+ auto sum = uint128_t();
+ for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) {
+ // Compute bigit at position bigit_index of the result by adding
+ // cross-product terms n[i] * n[j] such that i + j == bigit_index.
+ for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
+ // Most terms are multiplied twice which can be optimized in the future.
+ sum += static_cast<double_bigit>(n[i]) * n[j];
+ }
+ (*this)[bigit_index] = static_cast<bigit>(sum);
+ sum >>= num_bits<bigit>(); // Compute the carry.
+ }
+ // Do the same for the top half.
+ for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
+ ++bigit_index) {
+ for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
+ sum += static_cast<double_bigit>(n[i++]) * n[j--];
+ (*this)[bigit_index] = static_cast<bigit>(sum);
+ sum >>= num_bits<bigit>();
+ }
+ remove_leading_zeros();
+ exp_ *= 2;
+ }
+
+ // If this bigint has a bigger exponent than other, adds trailing zero to make
+ // exponents equal. This simplifies some operations such as subtraction.
+ FMT_CONSTEXPR20 void align(const bigint& other) {
+ int exp_difference = exp_ - other.exp_;
+ if (exp_difference <= 0) return;
+ int num_bigits = static_cast<int>(bigits_.size());
+ bigits_.resize(to_unsigned(num_bigits + exp_difference));
+ for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
+ bigits_[j] = bigits_[i];
+ std::uninitialized_fill_n(bigits_.data(), exp_difference, 0);
+ exp_ -= exp_difference;
+ }
+
+ // Divides this bignum by divisor, assigning the remainder to this and
+ // returning the quotient.
+ FMT_CONSTEXPR20 int divmod_assign(const bigint& divisor) {
+ FMT_ASSERT(this != &divisor, "");
+ if (compare(*this, divisor) < 0) return 0;
+ FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
+ align(divisor);
+ int quotient = 0;
+ do {
+ subtract_aligned(divisor);
+ ++quotient;
+ } while (compare(*this, divisor) >= 0);
+ return quotient;
+ }
+};
+
+// format_dragon flags.
+enum dragon {
+ predecessor_closer = 1,
+ fixup = 2, // Run fixup to correct exp10 which can be off by one.
+ fixed = 4,
+};
+
+// Formats a floating-point number using a variation of the Fixed-Precision
+// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
+// https://fmt.dev/papers/p372-steele.pdf.
+FMT_CONSTEXPR20 inline void format_dragon(basic_fp<uint128_t> value,
+ unsigned flags, int num_digits,
+ buffer<char>& buf, int& exp10) {
+ bigint numerator; // 2 * R in (FPP)^2.
+ bigint denominator; // 2 * S in (FPP)^2.
+ // lower and upper are differences between value and corresponding boundaries.
+ bigint lower; // (M^- in (FPP)^2).
+ bigint upper_store; // upper's value if different from lower.
+ bigint* upper = nullptr; // (M^+ in (FPP)^2).
+ // Shift numerator and denominator by an extra bit or two (if lower boundary
+ // is closer) to make lower and upper integers. This eliminates multiplication
+ // by 2 during later computations.
+ bool is_predecessor_closer = (flags & dragon::predecessor_closer) != 0;
+ int shift = is_predecessor_closer ? 2 : 1;
+ if (value.e >= 0) {
+ numerator = value.f;
+ numerator <<= value.e + shift;
+ lower = 1;
+ lower <<= value.e;
+ if (is_predecessor_closer) {
+ upper_store = 1;
+ upper_store <<= value.e + 1;
+ upper = &upper_store;
+ }
+ denominator.assign_pow10(exp10);
+ denominator <<= shift;
+ } else if (exp10 < 0) {
+ numerator.assign_pow10(-exp10);
+ lower.assign(numerator);
+ if (is_predecessor_closer) {
+ upper_store.assign(numerator);
+ upper_store <<= 1;
+ upper = &upper_store;
+ }
+ numerator *= value.f;
+ numerator <<= shift;
+ denominator = 1;
+ denominator <<= shift - value.e;
+ } else {
+ numerator = value.f;
+ numerator <<= shift;
+ denominator.assign_pow10(exp10);
+ denominator <<= shift - value.e;
+ lower = 1;
+ if (is_predecessor_closer) {
+ upper_store = 1ULL << 1;
+ upper = &upper_store;
+ }
+ }
+ int even = static_cast<int>((value.f & 1) == 0);
+ if (!upper) upper = &lower;
+ bool shortest = num_digits < 0;
+ if ((flags & dragon::fixup) != 0) {
+ if (add_compare(numerator, *upper, denominator) + even <= 0) {
+ --exp10;
+ numerator *= 10;
+ if (num_digits < 0) {
+ lower *= 10;
+ if (upper != &lower) *upper *= 10;
+ }
+ }
+ if ((flags & dragon::fixed) != 0) adjust_precision(num_digits, exp10 + 1);
+ }
+ // Invariant: value == (numerator / denominator) * pow(10, exp10).
+ if (shortest) {
+ // Generate the shortest representation.
+ num_digits = 0;
+ char* data = buf.data();
+ for (;;) {
+ int digit = numerator.divmod_assign(denominator);
+ bool low = compare(numerator, lower) - even < 0; // numerator <[=] lower.
+ // numerator + upper >[=] pow10:
+ bool high = add_compare(numerator, *upper, denominator) + even > 0;
+ data[num_digits++] = static_cast<char>('0' + digit);
+ if (low || high) {
+ if (!low) {
+ ++data[num_digits - 1];
+ } else if (high) {
+ int result = add_compare(numerator, numerator, denominator);
+ // Round half to even.
+ if (result > 0 || (result == 0 && (digit % 2) != 0))
+ ++data[num_digits - 1];
+ }
+ buf.try_resize(to_unsigned(num_digits));
+ exp10 -= num_digits - 1;
+ return;
+ }
+ numerator *= 10;
+ lower *= 10;
+ if (upper != &lower) *upper *= 10;
+ }
+ }
+ // Generate the given number of digits.
+ exp10 -= num_digits - 1;
+ if (num_digits <= 0) {
+ denominator *= 10;
+ auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
+ buf.push_back(digit);
+ return;
+ }
+ buf.try_resize(to_unsigned(num_digits));
+ for (int i = 0; i < num_digits - 1; ++i) {
+ int digit = numerator.divmod_assign(denominator);
+ buf[i] = static_cast<char>('0' + digit);
+ numerator *= 10;
+ }
+ int digit = numerator.divmod_assign(denominator);
+ auto result = add_compare(numerator, numerator, denominator);
+ if (result > 0 || (result == 0 && (digit % 2) != 0)) {
+ if (digit == 9) {
+ const auto overflow = '0' + 10;
+ buf[num_digits - 1] = overflow;
+ // Propagate the carry.
+ for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
+ buf[i] = '0';
+ ++buf[i - 1];
+ }
+ if (buf[0] == overflow) {
+ buf[0] = '1';
+ ++exp10;
+ }
+ return;
+ }
+ ++digit;
+ }
+ buf[num_digits - 1] = static_cast<char>('0' + digit);
+}
+
+// Formats a floating-point number using the hexfloat format.
+template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
+FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
+ float_specs specs, buffer<char>& buf) {
+ // float is passed as double to reduce the number of instantiations and to
+ // simplify implementation.
+ static_assert(!std::is_same<Float, float>::value, "");
+
+ using info = dragonbox::float_info<Float>;
+
+ // Assume Float is in the format [sign][exponent][significand].
+ using carrier_uint = typename info::carrier_uint;
+
+ constexpr auto num_float_significand_bits =
+ detail::num_significand_bits<Float>();
+
+ basic_fp<carrier_uint> f(value);
+ f.e += num_float_significand_bits;
+ if (!has_implicit_bit<Float>()) --f.e;
+
+ constexpr auto num_fraction_bits =
+ num_float_significand_bits + (has_implicit_bit<Float>() ? 1 : 0);
+ constexpr auto num_xdigits = (num_fraction_bits + 3) / 4;
+
+ constexpr auto leading_shift = ((num_xdigits - 1) * 4);
+ const auto leading_mask = carrier_uint(0xF) << leading_shift;
+ const auto leading_xdigit =
+ static_cast<uint32_t>((f.f & leading_mask) >> leading_shift);
+ if (leading_xdigit > 1) f.e -= (32 - countl_zero(leading_xdigit) - 1);
+
+ int print_xdigits = num_xdigits - 1;
+ if (precision >= 0 && print_xdigits > precision) {
+ const int shift = ((print_xdigits - precision - 1) * 4);
+ const auto mask = carrier_uint(0xF) << shift;
+ const auto v = static_cast<uint32_t>((f.f & mask) >> shift);
+
+ if (v >= 8) {
+ const auto inc = carrier_uint(1) << (shift + 4);
+ f.f += inc;
+ f.f &= ~(inc - 1);
+ }
+
+ // Check long double overflow
+ if (!has_implicit_bit<Float>()) {
+ const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
+ if ((f.f & implicit_bit) == implicit_bit) {
+ f.f >>= 4;
+ f.e += 4;
+ }
+ }
+
+ print_xdigits = precision;
+ }
+
+ char xdigits[num_bits<carrier_uint>() / 4];
+ detail::fill_n(xdigits, sizeof(xdigits), '0');
+ format_uint<4>(xdigits, f.f, num_xdigits, specs.upper);
+
+ // Remove zero tail
+ while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits;
+
+ buf.push_back('0');
+ buf.push_back(specs.upper ? 'X' : 'x');
+ buf.push_back(xdigits[0]);
+ if (specs.showpoint || print_xdigits > 0 || print_xdigits < precision)
+ buf.push_back('.');
+ buf.append(xdigits + 1, xdigits + 1 + print_xdigits);
+ for (; print_xdigits < precision; ++print_xdigits) buf.push_back('0');
+
+ buf.push_back(specs.upper ? 'P' : 'p');
+
+ uint32_t abs_e;
+ if (f.e < 0) {
+ buf.push_back('-');
+ abs_e = static_cast<uint32_t>(-f.e);
+ } else {
+ buf.push_back('+');
+ abs_e = static_cast<uint32_t>(f.e);
+ }
+ format_decimal<char>(appender(buf), abs_e, detail::count_digits(abs_e));
+}
+
+template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
+FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
+ float_specs specs, buffer<char>& buf) {
+ format_hexfloat(static_cast<double>(value), precision, specs, buf);
+}
+
+template <typename Float>
+FMT_CONSTEXPR20 auto format_float(Float value, int precision, float_specs specs,
+ buffer<char>& buf) -> int {
+ // float is passed as double to reduce the number of instantiations.
+ static_assert(!std::is_same<Float, float>::value, "");
+ FMT_ASSERT(value >= 0, "value is negative");
+ auto converted_value = convert_float(value);
+
+ const bool fixed = specs.format == float_format::fixed;
+ if (value <= 0) { // <= instead of == to silence a warning.
+ if (precision <= 0 || !fixed) {
+ buf.push_back('0');
+ return 0;
+ }
+ buf.try_resize(to_unsigned(precision));
+ fill_n(buf.data(), precision, '0');
+ return -precision;
+ }
+
+ int exp = 0;
+ bool use_dragon = true;
+ unsigned dragon_flags = 0;
+ if (!is_fast_float<Float>() || is_constant_evaluated()) {
+ const auto inv_log2_10 = 0.3010299956639812; // 1 / log2(10)
+ using info = dragonbox::float_info<decltype(converted_value)>;
+ const auto f = basic_fp<typename info::carrier_uint>(converted_value);
+ // Compute exp, an approximate power of 10, such that
+ // 10^(exp - 1) <= value < 10^exp or 10^exp <= value < 10^(exp + 1).
+ // This is based on log10(value) == log2(value) / log2(10) and approximation
+ // of log2(value) by e + num_fraction_bits idea from double-conversion.
+ auto e = (f.e + count_digits<1>(f.f) - 1) * inv_log2_10 - 1e-10;
+ exp = static_cast<int>(e);
+ if (e > exp) ++exp; // Compute ceil.
+ dragon_flags = dragon::fixup;
+ } else 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;
+ } else {
+ // Extract significand bits and exponent bits.
+ using info = dragonbox::float_info<double>;
+ auto br = bit_cast<uint64_t>(static_cast<double>(value));
+
+ const uint64_t significand_mask =
+ (static_cast<uint64_t>(1) << num_significand_bits<double>()) - 1;
+ uint64_t significand = (br & significand_mask);
+ int exponent = static_cast<int>((br & exponent_mask<double>()) >>
+ num_significand_bits<double>());
+
+ if (exponent != 0) { // Check if normal.
+ exponent -= exponent_bias<double>() + num_significand_bits<double>();
+ significand |=
+ (static_cast<uint64_t>(1) << num_significand_bits<double>());
+ significand <<= 1;
+ } else {
+ // Normalize subnormal inputs.
+ FMT_ASSERT(significand != 0, "zeros should not appear here");
+ int shift = countl_zero(significand);
+ FMT_ASSERT(shift >= num_bits<uint64_t>() - num_significand_bits<double>(),
+ "");
+ shift -= (num_bits<uint64_t>() - num_significand_bits<double>() - 2);
+ exponent = (std::numeric_limits<double>::min_exponent -
+ num_significand_bits<double>()) -
+ shift;
+ significand <<= shift;
+ }
+
+ // Compute the first several nonzero decimal significand digits.
+ // We call the number we get the first segment.
+ const int k = info::kappa - dragonbox::floor_log10_pow2(exponent);
+ exp = -k;
+ const int beta = exponent + dragonbox::floor_log2_pow10(k);
+ uint64_t first_segment;
+ bool has_more_segments;
+ int digits_in_the_first_segment;
+ {
+ const auto r = dragonbox::umul192_upper128(
+ significand << beta, dragonbox::get_cached_power(k));
+ first_segment = r.high();
+ has_more_segments = r.low() != 0;
+
+ // The first segment can have 18 ~ 19 digits.
+ if (first_segment >= 1000000000000000000ULL) {
+ digits_in_the_first_segment = 19;
+ } else {
+ // When it is of 18-digits, we align it to 19-digits by adding a bogus
+ // zero at the end.
+ digits_in_the_first_segment = 18;
+ first_segment *= 10;
+ }
+ }
+
+ // Compute the actual number of decimal digits to print.
+ if (fixed) adjust_precision(precision, exp + digits_in_the_first_segment);
+
+ // Use Dragon4 only when there might be not enough digits in the first
+ // segment.
+ if (digits_in_the_first_segment > precision) {
+ use_dragon = false;
+
+ if (precision <= 0) {
+ exp += digits_in_the_first_segment;
+
+ if (precision < 0) {
+ // Nothing to do, since all we have are just leading zeros.
+ buf.try_resize(0);
+ } else {
+ // We may need to round-up.
+ buf.try_resize(1);
+ if ((first_segment | static_cast<uint64_t>(has_more_segments)) >
+ 5000000000000000000ULL) {
+ buf[0] = '1';
+ } else {
+ buf[0] = '0';
+ }
+ }
+ } // precision <= 0
+ else {
+ exp += digits_in_the_first_segment - precision;
+
+ // When precision > 0, we divide the first segment into three
+ // subsegments, each with 9, 9, and 0 ~ 1 digits so that each fits
+ // in 32-bits which usually allows faster calculation than in
+ // 64-bits. Since some compiler (e.g. MSVC) doesn't know how to optimize
+ // division-by-constant for large 64-bit divisors, we do it here
+ // manually. The magic number 7922816251426433760 below is equal to
+ // ceil(2^(64+32) / 10^10).
+ const uint32_t first_subsegment = static_cast<uint32_t>(
+ dragonbox::umul128_upper64(first_segment, 7922816251426433760ULL) >>
+ 32);
+ const uint64_t second_third_subsegments =
+ first_segment - first_subsegment * 10000000000ULL;
+
+ uint64_t prod;
+ uint32_t digits;
+ bool should_round_up;
+ int number_of_digits_to_print = precision > 9 ? 9 : precision;
+
+ // Print a 9-digits subsegment, either the first or the second.
+ auto print_subsegment = [&](uint32_t subsegment, char* buffer) {
+ int number_of_digits_printed = 0;
+
+ // If we want to print an odd number of digits from the subsegment,
+ if ((number_of_digits_to_print & 1) != 0) {
+ // Convert to 64-bit fixed-point fractional form with 1-digit
+ // integer part. The magic number 720575941 is a good enough
+ // approximation of 2^(32 + 24) / 10^8; see
+ // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
+ // for details.
+ prod = ((subsegment * static_cast<uint64_t>(720575941)) >> 24) + 1;
+ digits = static_cast<uint32_t>(prod >> 32);
+ *buffer = static_cast<char>('0' + digits);
+ number_of_digits_printed++;
+ }
+ // If we want to print an even number of digits from the
+ // first_subsegment,
+ else {
+ // Convert to 64-bit fixed-point fractional form with 2-digits
+ // integer part. The magic number 450359963 is a good enough
+ // approximation of 2^(32 + 20) / 10^7; see
+ // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
+ // for details.
+ prod = ((subsegment * static_cast<uint64_t>(450359963)) >> 20) + 1;
+ digits = static_cast<uint32_t>(prod >> 32);
+ copy2(buffer, digits2(digits));
+ number_of_digits_printed += 2;
+ }
+
+ // Print all digit pairs.
+ while (number_of_digits_printed < number_of_digits_to_print) {
+ prod = static_cast<uint32_t>(prod) * static_cast<uint64_t>(100);
+ digits = static_cast<uint32_t>(prod >> 32);
+ copy2(buffer + number_of_digits_printed, digits2(digits));
+ number_of_digits_printed += 2;
+ }
+ };
+
+ // Print first subsegment.
+ print_subsegment(first_subsegment, buf.data());
+
+ // Perform rounding if the first subsegment is the last subsegment to
+ // print.
+ if (precision <= 9) {
+ // Rounding inside the subsegment.
+ // We round-up if:
+ // - either the fractional part is strictly larger than 1/2, or
+ // - the fractional part is exactly 1/2 and the last digit is odd.
+ // We rely on the following observations:
+ // - If fractional_part >= threshold, then the fractional part is
+ // strictly larger than 1/2.
+ // - If the MSB of fractional_part is set, then the fractional part
+ // must be at least 1/2.
+ // - When the MSB of fractional_part is set, either
+ // second_third_subsegments being nonzero or has_more_segments
+ // being true means there are further digits not printed, so the
+ // fractional part is strictly larger than 1/2.
+ if (precision < 9) {
+ uint32_t fractional_part = static_cast<uint32_t>(prod);
+ should_round_up = fractional_part >=
+ data::fractional_part_rounding_thresholds
+ [8 - number_of_digits_to_print] ||
+ ((fractional_part >> 31) &
+ ((digits & 1) | (second_third_subsegments != 0) |
+ has_more_segments)) != 0;
+ }
+ // Rounding at the subsegment boundary.
+ // In this case, the fractional part is at least 1/2 if and only if
+ // second_third_subsegments >= 5000000000ULL, and is strictly larger
+ // than 1/2 if we further have either second_third_subsegments >
+ // 5000000000ULL or has_more_segments == true.
+ else {
+ should_round_up = second_third_subsegments > 5000000000ULL ||
+ (second_third_subsegments == 5000000000ULL &&
+ ((digits & 1) != 0 || has_more_segments));
+ }
+ }
+ // Otherwise, print the second subsegment.
+ else {
+ // Compilers are not aware of how to leverage the maximum value of
+ // second_third_subsegments to find out a better magic number which
+ // allows us to eliminate an additional shift. 1844674407370955162 =
+ // ceil(2^64/10) < ceil(2^64*(10^9/(10^10 - 1))).
+ const uint32_t second_subsegment =
+ static_cast<uint32_t>(dragonbox::umul128_upper64(
+ second_third_subsegments, 1844674407370955162ULL));
+ const uint32_t third_subsegment =
+ static_cast<uint32_t>(second_third_subsegments) -
+ second_subsegment * 10;
+
+ number_of_digits_to_print = precision - 9;
+ print_subsegment(second_subsegment, buf.data() + 9);
+
+ // Rounding inside the subsegment.
+ if (precision < 18) {
+ // The condition third_subsegment != 0 implies that the segment was
+ // of 19 digits, so in this case the third segment should be
+ // consisting of a genuine digit from the input.
+ uint32_t fractional_part = static_cast<uint32_t>(prod);
+ should_round_up = fractional_part >=
+ data::fractional_part_rounding_thresholds
+ [8 - number_of_digits_to_print] ||
+ ((fractional_part >> 31) &
+ ((digits & 1) | (third_subsegment != 0) |
+ has_more_segments)) != 0;
+ }
+ // Rounding at the subsegment boundary.
+ else {
+ // In this case, the segment must be of 19 digits, thus
+ // the third subsegment should be consisting of a genuine digit from
+ // the input.
+ should_round_up = third_subsegment > 5 ||
+ (third_subsegment == 5 &&
+ ((digits & 1) != 0 || has_more_segments));
+ }
+ }
+
+ // Round-up if necessary.
+ if (should_round_up) {
+ ++buf[precision - 1];
+ for (int i = precision - 1; i > 0 && buf[i] > '9'; --i) {
+ buf[i] = '0';
+ ++buf[i - 1];
+ }
+ if (buf[0] > '9') {
+ buf[0] = '1';
+ if (fixed)
+ buf[precision++] = '0';
+ else
+ ++exp;
+ }
+ }
+ buf.try_resize(to_unsigned(precision));
+ }
+ } // if (digits_in_the_first_segment > precision)
+ else {
+ // Adjust the exponent for its use in Dragon4.
+ exp += digits_in_the_first_segment - 1;
+ }
+ }
+ if (use_dragon) {
+ auto f = basic_fp<uint128_t>();
+ bool is_predecessor_closer = specs.binary32
+ ? f.assign(static_cast<float>(value))
+ : f.assign(converted_value);
+ if (is_predecessor_closer) dragon_flags |= dragon::predecessor_closer;
+ if (fixed) dragon_flags |= dragon::fixed;
+ // Limit precision to the maximum possible number of significant digits in
+ // an IEEE754 double because we don't need to generate zeros.
+ const int max_double_digits = 767;
+ if (precision > max_double_digits) precision = max_double_digits;
+ format_dragon(f, dragon_flags, precision, buf, exp);
+ }
+ if (!fixed && !specs.showpoint) {
+ // Remove trailing zeros.
+ auto num_digits = buf.size();
+ while (num_digits > 0 && buf[num_digits - 1] == '0') {
+ --num_digits;
+ ++exp;
+ }
+ buf.try_resize(num_digits);
+ }
+ return exp;
+}
+template <typename Char, typename OutputIt, typename T>
+FMT_CONSTEXPR20 auto write_float(OutputIt out, T value,
+ format_specs<Char> specs, locale_ref loc)
-> OutputIt {
- if (const_check(!is_supported_floating_point(value))) return out;
float_specs fspecs = parse_float_type_spec(specs);
fspecs.sign = specs.sign;
if (detail::signbit(value)) { // value < 0 is false for NaN so use signbit.
}
if (!detail::isfinite(value))
- return write_nonfinite(out, detail::isinf(value), specs, fspecs);
+ return write_nonfinite(out, detail::isnan(value), specs, fspecs);
if (specs.align == align::numeric && fspecs.sign) {
auto it = reserve(out, 1);
memory_buffer buffer;
if (fspecs.format == float_format::hex) {
if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
- snprintf_float(promote_float(value), specs.precision, fspecs, buffer);
+ format_hexfloat(convert_float(value), specs.precision, fspecs, buffer);
return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
specs);
}
throw_format_error("number is too big");
else
++precision;
+ } else if (fspecs.format != float_format::fixed && precision == 0) {
+ precision = 1;
}
if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
- if (!is_fast_float<T>()) fspecs.fallback = true;
- int exp = format_float(promote_float(value), precision, fspecs, buffer);
+ int exp = format_float(convert_float(value), precision, fspecs, buffer);
fspecs.precision = precision;
- auto fp = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
- return write_float(out, fp, specs, fspecs, loc);
+ auto f = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
+ return write_float(out, f, specs, fspecs, loc);
+}
+
+template <typename Char, typename OutputIt, typename T,
+ FMT_ENABLE_IF(is_floating_point<T>::value)>
+FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs<Char> specs,
+ locale_ref loc = {}) -> OutputIt {
+ if (const_check(!is_supported_floating_point(value))) return out;
+ return specs.localized && write_loc(out, value, specs, loc)
+ ? out
+ : write_float(out, value, specs, loc);
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(is_fast_float<T>::value)>
FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
- if (is_constant_evaluated()) {
- return write(out, value, basic_format_specs<Char>());
- }
-
+ if (is_constant_evaluated()) return write(out, value, format_specs<Char>());
if (const_check(!is_supported_floating_point(value))) return out;
- using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
- using uint = typename dragonbox::float_info<floaty>::carrier_uint;
- auto bits = bit_cast<uint>(value);
-
auto fspecs = float_specs();
if (detail::signbit(value)) {
fspecs.sign = sign::minus;
value = -value;
}
- constexpr auto specs = basic_format_specs<Char>();
- uint mask = exponent_mask<floaty>();
- if ((bits & mask) == mask)
- return write_nonfinite(out, std::isinf(value), specs, fspecs);
+ constexpr auto specs = format_specs<Char>();
+ using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
+ using floaty_uint = typename dragonbox::float_info<floaty>::carrier_uint;
+ floaty_uint mask = exponent_mask<floaty>();
+ if ((bit_cast<floaty_uint>(value) & mask) == mask)
+ return write_nonfinite(out, std::isnan(value), specs, fspecs);
auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
return write_float(out, dec, specs, fspecs, {});
}
template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(std::is_floating_point<T>::value &&
+ FMT_ENABLE_IF(is_floating_point<T>::value &&
!is_fast_float<T>::value)>
inline auto write(OutputIt out, T value) -> OutputIt {
- return write(out, value, basic_format_specs<Char>());
+ return write(out, value, format_specs<Char>());
}
template <typename Char, typename OutputIt>
-auto write(OutputIt out, monostate, basic_format_specs<Char> = {},
- locale_ref = {}) -> OutputIt {
+auto write(OutputIt out, monostate, format_specs<Char> = {}, locale_ref = {})
+ -> OutputIt {
FMT_ASSERT(false, "");
return out;
}
return write<Char>(out, to_string_view(value));
}
-template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(is_integral<T>::value &&
- !std::is_same<T, bool>::value &&
- !std::is_same<T, Char>::value)>
-FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
- auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
- bool negative = is_negative(value);
- // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
- if (negative) abs_value = ~abs_value + 1;
- int num_digits = count_digits(abs_value);
- auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
- auto it = reserve(out, size);
- if (auto ptr = to_pointer<Char>(it, size)) {
- if (negative) *ptr++ = static_cast<Char>('-');
- format_decimal<Char>(ptr, abs_value, num_digits);
- return out;
- }
- if (negative) *it++ = static_cast<Char>('-');
- it = format_decimal<Char>(it, abs_value, num_digits).end;
- return base_iterator(out, it);
-}
-
// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
template <
typename Char, typename OutputIt, typename T,
type::custom_type,
FMT_ENABLE_IF(check)>
FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
- return write<Char>(
- out, static_cast<typename std::underlying_type<T>::type>(value));
+ return write<Char>(out, static_cast<underlying_t<T>>(value));
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_same<T, bool>::value)>
FMT_CONSTEXPR auto write(OutputIt out, T value,
- const basic_format_specs<Char>& specs = {},
- locale_ref = {}) -> OutputIt {
+ const format_specs<Char>& specs = {}, locale_ref = {})
+ -> OutputIt {
return specs.type != presentation_type::none &&
specs.type != presentation_type::string
? write(out, value ? 1 : 0, specs, {})
template <typename Char, typename OutputIt>
FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
-> OutputIt {
- if (!value) {
- throw_format_error("string pointer is null");
- } else {
- out = write(out, basic_string_view<Char>(value));
- }
+ if (value) return write(out, basic_string_view<Char>(value));
+ throw_format_error("string pointer is null");
return out;
}
template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF(std::is_same<T, void>::value)>
-auto write(OutputIt out, const T* value,
- const basic_format_specs<Char>& specs = {}, locale_ref = {})
- -> OutputIt {
- check_pointer_type_spec(specs.type, error_handler());
- return write_ptr<Char>(out, to_uintptr(value), &specs);
+auto write(OutputIt out, const T* value, const format_specs<Char>& specs = {},
+ locale_ref = {}) -> OutputIt {
+ return write_ptr<Char>(out, bit_cast<uintptr_t>(value), &specs);
}
// A write overload that handles implicit conversions.
typename Context = basic_format_context<OutputIt, Char>>
FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
std::is_class<T>::value && !is_string<T>::value &&
- !std::is_same<T, Char>::value &&
- !std::is_same<const T&,
- decltype(arg_mapper<Context>().map(value))>::value,
+ !is_floating_point<T>::value && !std::is_same<T, Char>::value &&
+ !std::is_same<T, remove_cvref_t<decltype(arg_mapper<Context>().map(
+ value))>>::value,
OutputIt> {
return write<Char>(out, arg_mapper<Context>().map(value));
}
FMT_CONSTEXPR auto write(OutputIt out, const T& value)
-> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
OutputIt> {
- using formatter_type =
- conditional_t<has_formatter<T, Context>::value,
- typename Context::template formatter_type<T>,
- fallback_formatter<T, Char>>;
auto ctx = Context(out, {}, {});
- return formatter_type().format(value, ctx);
+ return typename Context::template formatter_type<T>().format(value, ctx);
}
// An argument visitor that formats the argument and writes it via the output
using context = buffer_context<Char>;
iterator out;
- const basic_format_specs<Char>& specs;
+ const format_specs<Char>& specs;
locale_ref locale;
template <typename T>
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 Context, typename ID>
-FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) ->
- typename Context::format_arg {
+FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) -> decltype(ctx.arg(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 Char> class specs_handler : public specs_setter<Char> {
- private:
- basic_format_parse_context<Char>& parse_context_;
- buffer_context<Char>& context_;
-
- // This is only needed for compatibility with gcc 4.4.
- using format_arg = basic_format_arg<buffer_context<Char>>;
-
- FMT_CONSTEXPR auto get_arg(auto_id) -> format_arg {
- return detail::get_arg(context_, parse_context_.next_arg_id());
- }
-
- FMT_CONSTEXPR auto get_arg(int arg_id) -> format_arg {
- parse_context_.check_arg_id(arg_id);
- return detail::get_arg(context_, arg_id);
- }
-
- FMT_CONSTEXPR auto get_arg(basic_string_view<Char> arg_id) -> format_arg {
- parse_context_.check_arg_id(arg_id);
- return detail::get_arg(context_, arg_id);
- }
-
- public:
- FMT_CONSTEXPR specs_handler(basic_format_specs<Char>& specs,
- basic_format_parse_context<Char>& parse_ctx,
- buffer_context<Char>& ctx)
- : specs_setter<Char>(specs), parse_context_(parse_ctx), context_(ctx) {}
-
- template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
- this->specs_.width = get_dynamic_spec<width_checker>(
- get_arg(arg_id), context_.error_handler());
- }
-
- template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
- this->specs_.precision = get_dynamic_spec<precision_checker>(
- get_arg(arg_id), context_.error_handler());
- }
-
- void on_error(const char* message) { context_.on_error(message); }
-};
-
template <template <typename> class Handler, typename Context>
FMT_CONSTEXPR void handle_dynamic_spec(int& value,
arg_ref<typename Context::char_type> ref,
case arg_id_kind::none:
break;
case arg_id_kind::index:
- value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.index),
+ value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.index),
ctx.error_handler());
break;
case arg_id_kind::name:
- value = detail::get_dynamic_spec<Handler>(ctx.arg(ref.val.name),
+ value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.name),
ctx.error_handler());
break;
}
}
-#define FMT_STRING_IMPL(s, base, explicit) \
- [] { \
- /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
- /* Use a macro-like name to avoid shadowing warnings. */ \
- struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base { \
- using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
- FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit \
- operator fmt::basic_string_view<char_type>() const { \
- return fmt::detail_exported::compile_string_to_view<char_type>(s); \
- } \
- }; \
- return FMT_COMPILE_STRING(); \
- }()
-
-/**
- \rst
- Constructs a compile-time format string from a string literal *s*.
-
- **Example**::
-
- // A compile-time error because 'd' is an invalid specifier for strings.
- std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
- \endrst
- */
-#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
-
#if FMT_USE_USER_DEFINED_LITERALS
-template <typename Char> struct udl_formatter {
- basic_string_view<Char> str;
-
- template <typename... T>
- auto operator()(T&&... args) const -> std::basic_string<Char> {
- return vformat(str, fmt::make_args_checked<T...>(str, args...));
- }
-};
-
-# if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+# if FMT_USE_NONTYPE_TEMPLATE_ARGS
template <typename T, typename Char, size_t N,
fmt::detail_exported::fixed_string<Char, N> Str>
struct statically_named_arg : view {
#endif // FMT_USE_USER_DEFINED_LITERALS
template <typename Locale, typename Char>
-auto vformat(const Locale& loc, basic_string_view<Char> format_str,
+auto vformat(const Locale& loc, basic_string_view<Char> fmt,
basic_format_args<buffer_context<type_identity_t<Char>>> args)
-> std::basic_string<Char> {
- basic_memory_buffer<Char> buffer;
- detail::vformat_to(buffer, format_str, args, detail::locale_ref(loc));
- return {buffer.data(), buffer.size()};
+ auto buf = basic_memory_buffer<Char>();
+ detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
+ return {buf.data(), buf.size()};
}
using format_func = void (*)(detail::buffer<char>&, int, const char*);
FMT_API void format_error_code(buffer<char>& out, int error_code,
- string_view message) FMT_NOEXCEPT;
+ string_view message) noexcept;
FMT_API void report_error(format_func func, int error_code,
- const char* message) FMT_NOEXCEPT;
-FMT_END_DETAIL_NAMESPACE
+ const char* message) noexcept;
+} // namespace detail
FMT_API auto vsystem_error(int error_code, string_view format_str,
format_args args) -> std::system_error;
/**
- \rst
- Constructs :class:`std::system_error` with a message formatted with
- ``fmt::format(fmt, args...)``.
+ \rst
+ Constructs :class:`std::system_error` with a message formatted with
+ ``fmt::format(fmt, args...)``.
*error_code* is a system error code as given by ``errno``.
- **Example**::
-
- // This throws std::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
-*/
+ **Example**::
+
+ // This throws std::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... T>
auto system_error(int error_code, format_string<T...> fmt, T&&... args)
-> std::system_error {
\endrst
*/
FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
- const char* message) FMT_NOEXCEPT;
+ const char* message) noexcept;
// Reports a system error without throwing an exception.
// Can be used to report errors from destructors.
-FMT_API void report_system_error(int error_code,
- const char* message) FMT_NOEXCEPT;
+FMT_API void report_system_error(int error_code, const char* message) noexcept;
/** Fast integer formatter. */
class format_int {
};
template <typename T, typename Char>
-template <typename FormatContext>
-FMT_CONSTEXPR FMT_INLINE auto
-formatter<T, Char,
- enable_if_t<detail::type_constant<T, Char>::value !=
- detail::type::custom_type>>::format(const T& val,
- FormatContext& ctx)
- const -> decltype(ctx.out()) {
- if (specs_.width_ref.kind != detail::arg_id_kind::none ||
- specs_.precision_ref.kind != detail::arg_id_kind::none) {
- auto specs = specs_;
- detail::handle_dynamic_spec<detail::width_checker>(specs.width,
- specs.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs.precision, specs.precision_ref, ctx);
- return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
- }
- return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
-}
+struct formatter<T, Char, enable_if_t<detail::has_format_as<T>::value>>
+ : private formatter<detail::format_as_t<T>, Char> {
+ using base = formatter<detail::format_as_t<T>, Char>;
+ using base::parse;
-#define FMT_FORMAT_AS(Type, Base) \
- template <typename Char> \
- struct formatter<Type, Char> : formatter<Base, Char> { \
- template <typename FormatContext> \
- auto format(Type const& val, FormatContext& ctx) const \
- -> decltype(ctx.out()) { \
- return formatter<Base, Char>::format(static_cast<Base>(val), ctx); \
- } \
+ template <typename FormatContext>
+ auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) {
+ return base::format(format_as(value), ctx);
}
+};
+
+#define FMT_FORMAT_AS(Type, Base) \
+ template <typename Char> \
+ struct formatter<Type, Char> : formatter<Base, Char> {}
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(long, detail::long_type);
+FMT_FORMAT_AS(unsigned long, detail::ulong_type);
FMT_FORMAT_AS(Char*, const Char*);
FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
FMT_FORMAT_AS(std::nullptr_t, const void*);
-FMT_FORMAT_AS(detail::byte, unsigned char);
FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
-
-template <typename Char>
-struct formatter<void*, Char> : formatter<const void*, Char> {
- template <typename FormatContext>
- auto format(void* val, FormatContext& ctx) const -> decltype(ctx.out()) {
- return formatter<const void*, Char>::format(val, ctx);
- }
-};
+FMT_FORMAT_AS(void*, const void*);
template <typename Char, size_t N>
-struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {
- template <typename FormatContext>
- FMT_CONSTEXPR auto format(const Char* val, FormatContext& ctx) const
- -> 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:
- detail::dynamic_format_specs<Char> specs_;
- const Char* format_str_;
-
- struct null_handler : detail::error_handler {
- void on_align(align_t) {}
- void on_sign(sign_t) {}
- void on_hash() {}
- };
-
- template <typename Context> void handle_specs(Context& ctx) {
- detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
- specs_.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
- }
-
- public:
- template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
- format_str_ = ctx.begin();
- // Checks are deferred to formatting time when the argument type is known.
- detail::dynamic_specs_handler<ParseContext> handler(specs_, ctx);
- return detail::parse_format_specs(ctx.begin(), ctx.end(), handler);
- }
-
- template <typename T, typename FormatContext>
- auto format(const T& val, FormatContext& ctx) -> decltype(ctx.out()) {
- handle_specs(ctx);
- detail::specs_checker<null_handler> checker(
- null_handler(), detail::mapped_type_constant<T, FormatContext>::value);
- checker.on_align(specs_.align);
- if (specs_.sign != sign::none) checker.on_sign(specs_.sign);
- if (specs_.alt) checker.on_hash();
- if (specs_.precision >= 0) checker.end_precision();
- return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
- }
-};
+struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {};
/**
\rst
static_assert(std::is_pointer<T>::value, "");
return detail::bit_cast<const void*>(p);
}
-template <typename T> auto ptr(const std::unique_ptr<T>& p) -> const void* {
+template <typename T, typename Deleter>
+auto ptr(const std::unique_ptr<T, Deleter>& p) -> const void* {
return p.get();
}
template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
return p.get();
}
+/**
+ \rst
+ Converts ``e`` to the underlying type.
+
+ **Example**::
+
+ enum class color { red, green, blue };
+ auto s = fmt::format("{}", fmt::underlying(color::red));
+ \endrst
+ */
+template <typename Enum>
+constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
+ return static_cast<underlying_t<Enum>>(e);
+}
+
+namespace enums {
+template <typename Enum, FMT_ENABLE_IF(std::is_enum<Enum>::value)>
+constexpr auto format_as(Enum e) noexcept -> underlying_t<Enum> {
+ return static_cast<underlying_t<Enum>>(e);
+}
+} // namespace enums
+
class bytes {
private:
string_view data_;
template <> struct formatter<bytes> {
private:
- detail::dynamic_format_specs<char> specs_;
+ detail::dynamic_format_specs<> specs_;
public:
template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
- using handler_type = detail::dynamic_specs_handler<ParseContext>;
- detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
- detail::type::string_type);
- auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
- detail::check_string_type_spec(specs_.type, ctx.error_handler());
- return it;
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
+ return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
+ detail::type::string_type);
}
template <typename FormatContext>
};
// group_digits_view is not derived from view because it copies the argument.
-template <typename T> struct group_digits_view { T value; };
+template <typename T> struct group_digits_view {
+ T value;
+};
/**
\rst
template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
private:
- detail::dynamic_format_specs<char> specs_;
+ detail::dynamic_format_specs<> specs_;
public:
template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
- using handler_type = detail::dynamic_specs_handler<ParseContext>;
- detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
- detail::type::int_type);
- auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
- detail::check_string_type_spec(specs_.type, ctx.error_handler());
- return it;
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
+ return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
+ detail::type::int_type);
}
template <typename FormatContext>
specs_.width_ref, ctx);
detail::handle_dynamic_spec<detail::precision_checker>(
specs_.precision, specs_.precision_ref, ctx);
- return detail::write_int_localized(
+ return detail::write_int(
ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
- detail::digit_grouping<char>({"\3", ','}));
+ detail::digit_grouping<char>("\3", ","));
}
};
+// DEPRECATED! join_view will be moved to ranges.h.
template <typename It, typename Sentinel, typename Char = char>
struct join_view : detail::view {
It begin;
: begin(b), end(e), sep(s) {}
};
-template <typename It, typename Sentinel, typename Char>
-using arg_join FMT_DEPRECATED_ALIAS = join_view<It, Sentinel, Char>;
-
template <typename It, typename Sentinel, typename Char>
struct formatter<join_view<It, Sentinel, Char>, Char> {
private:
#else
typename std::iterator_traits<It>::value_type;
#endif
- using context = buffer_context<Char>;
- using mapper = detail::arg_mapper<context>;
-
- template <typename T, FMT_ENABLE_IF(has_formatter<T, context>::value)>
- static auto map(const T& value) -> const T& {
- return value;
- }
- template <typename T, FMT_ENABLE_IF(!has_formatter<T, context>::value)>
- static auto map(const T& value) -> decltype(mapper().map(value)) {
- return mapper().map(value);
- }
-
- using formatter_type =
- conditional_t<is_formattable<value_type, Char>::value,
- formatter<remove_cvref_t<decltype(map(
- std::declval<const value_type&>()))>,
- Char>,
- detail::fallback_formatter<value_type, Char>>;
-
- formatter_type value_formatter_;
+ formatter<remove_cvref_t<value_type>, Char> value_formatter_;
public:
template <typename ParseContext>
- FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
return value_formatter_.parse(ctx);
}
template <typename FormatContext>
- auto format(const join_view<It, Sentinel, Char>& value, FormatContext& ctx)
- -> decltype(ctx.out()) {
+ auto format(const join_view<It, Sentinel, Char>& value,
+ FormatContext& ctx) const -> decltype(ctx.out()) {
auto it = value.begin;
auto out = ctx.out();
if (it != value.end) {
- out = value_formatter_.format(map(*it), ctx);
+ out = value_formatter_.format(*it, ctx);
++it;
while (it != value.end) {
out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
ctx.advance_to(out);
- out = value_formatter_.format(map(*it), ctx);
+ out = value_formatter_.format(*it, ctx);
++it;
}
}
*/
template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
inline auto to_string(const T& value) -> std::string {
- auto result = std::string();
- detail::write<char>(std::back_inserter(result), value);
- return result;
+ auto buffer = memory_buffer();
+ detail::write<char>(appender(buffer), value);
+ return {buffer.data(), buffer.size()};
}
template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
return std::basic_string<Char>(buf.data(), size);
}
-FMT_BEGIN_DETAIL_NAMESPACE
+namespace detail {
template <typename Char>
-void vformat_to(
- buffer<Char>& buf, basic_string_view<Char> fmt,
- basic_format_args<FMT_BUFFER_CONTEXT(type_identity_t<Char>)> args,
- locale_ref loc) {
- // workaround for msvc bug regarding name-lookup in module
- // link names into function scope
- using detail::arg_formatter;
- using detail::buffer_appender;
- using detail::custom_formatter;
- using detail::default_arg_formatter;
- using detail::get_arg;
- using detail::locale_ref;
- using detail::parse_format_specs;
- using detail::specs_checker;
- using detail::specs_handler;
- using detail::to_unsigned;
- using detail::type;
- using detail::write;
+void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
+ typename vformat_args<Char>::type args, locale_ref loc) {
auto out = buffer_appender<Char>(buf);
if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
auto arg = args.get(0);
basic_format_parse_context<Char> parse_context;
buffer_context<Char> context;
- format_handler(buffer_appender<Char> out, basic_string_view<Char> str,
- basic_format_args<buffer_context<Char>> args, locale_ref loc)
- : parse_context(str), context(out, args, loc) {}
+ format_handler(buffer_appender<Char> p_out, basic_string_view<Char> str,
+ basic_format_args<buffer_context<Char>> p_args,
+ locale_ref p_loc)
+ : parse_context(str), context(p_out, p_args, p_loc) {}
void on_text(const Char* begin, const Char* end) {
auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
-> const Char* {
auto arg = get_arg(context, id);
if (arg.type() == type::custom_type) {
- parse_context.advance_to(parse_context.begin() +
- (begin - &*parse_context.begin()));
+ parse_context.advance_to(begin);
visit_format_arg(custom_formatter<Char>{parse_context, context}, arg);
return parse_context.begin();
}
- auto specs = basic_format_specs<Char>();
- specs_checker<specs_handler<Char>> handler(
- specs_handler<Char>(specs, parse_context, context), arg.type());
- begin = parse_format_specs(begin, end, handler);
+ auto specs = detail::dynamic_format_specs<Char>();
+ begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
+ detail::handle_dynamic_spec<detail::width_checker>(
+ specs.width, specs.width_ref, context);
+ detail::handle_dynamic_spec<detail::precision_checker>(
+ specs.precision, specs.precision_ref, context);
if (begin == end || *begin != '}')
on_error("missing '}' in format string");
auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
}
#ifndef FMT_HEADER_ONLY
+extern template FMT_API void vformat_to(buffer<char>&, string_view,
+ typename vformat_args<>::type,
+ locale_ref);
extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
-> thousands_sep_result<char>;
extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
-> thousands_sep_result<wchar_t>;
extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
-extern template auto format_float<double>(double value, int precision,
- float_specs specs, buffer<char>& buf)
- -> int;
-extern template auto format_float<long double>(long double value, int precision,
- float_specs specs,
- buffer<char>& buf) -> int;
-void snprintf_float(float, int, float_specs, buffer<char>&) = delete;
-extern template auto snprintf_float<double>(double value, int precision,
- float_specs specs,
- buffer<char>& buf) -> int;
-extern template auto snprintf_float<long double>(long double value,
- int precision,
- float_specs specs,
- buffer<char>& buf) -> int;
#endif // FMT_HEADER_ONLY
-FMT_END_DETAIL_NAMESPACE
+} // namespace detail
#if FMT_USE_USER_DEFINED_LITERALS
inline namespace literals {
fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
\endrst
*/
-# if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
-template <detail_exported::fixed_string Str>
-constexpr auto operator""_a()
- -> detail::udl_arg<remove_cvref_t<decltype(Str.data[0])>,
- sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str> {
- return {};
+# if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <detail_exported::fixed_string Str> constexpr auto operator""_a() {
+ using char_t = remove_cvref_t<decltype(Str.data[0])>;
+ return detail::udl_arg<char_t, sizeof(Str.data) / sizeof(char_t), Str>();
}
# else
constexpr auto operator"" _a(const char* s, size_t) -> detail::udl_arg<char> {
return {s};
}
# endif
-
-// DEPRECATED!
-// User-defined literal equivalent of fmt::format.
-FMT_DEPRECATED constexpr auto operator"" _format(const char* s, size_t n)
- -> detail::udl_formatter<char> {
- return {{s, n}};
-}
} // namespace literals
#endif // FMT_USE_USER_DEFINED_LITERALS
FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
-> std::string {
- return vformat(loc, string_view(fmt), fmt::make_format_args(args...));
-}
-
-template <typename... T, size_t SIZE, typename Allocator>
-FMT_DEPRECATED auto format_to(basic_memory_buffer<char, SIZE, Allocator>& buf,
- format_string<T...> fmt, T&&... args)
- -> appender {
- detail::vformat_to(buf, string_view(fmt), fmt::make_format_args(args...));
- return appender(buf);
+ return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...));
}
template <typename OutputIt, typename Locale,
using detail::get_buffer;
auto&& buf = get_buffer<char>(out);
detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
- return detail::get_iterator(buf);
+ return detail::get_iterator(buf, out);
}
template <typename OutputIt, typename Locale, typename... T,
return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
}
-FMT_MODULE_EXPORT_END
-FMT_END_NAMESPACE
+template <typename Locale, typename... T,
+ FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
+FMT_NODISCARD FMT_INLINE auto formatted_size(const Locale& loc,
+ format_string<T...> fmt,
+ T&&... args) -> size_t {
+ auto buf = detail::counting_buffer<>();
+ detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...),
+ detail::locale_ref(loc));
+ return buf.count();
+}
-#ifdef FMT_DEPRECATED_INCLUDE_XCHAR
-# include "xchar.h"
-#endif
+FMT_END_EXPORT
+
+template <typename T, typename Char>
+template <typename FormatContext>
+FMT_CONSTEXPR FMT_INLINE auto
+formatter<T, Char,
+ enable_if_t<detail::type_constant<T, Char>::value !=
+ detail::type::custom_type>>::format(const T& val,
+ FormatContext& ctx)
+ const -> decltype(ctx.out()) {
+ if (specs_.width_ref.kind != detail::arg_id_kind::none ||
+ specs_.precision_ref.kind != detail::arg_id_kind::none) {
+ auto specs = specs_;
+ detail::handle_dynamic_spec<detail::width_checker>(specs.width,
+ specs.width_ref, ctx);
+ detail::handle_dynamic_spec<detail::precision_checker>(
+ specs.precision, specs.precision_ref, ctx);
+ return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
+ }
+ return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
+}
+
+FMT_END_NAMESPACE
#ifdef FMT_HEADER_ONLY
# define FMT_FUNC inline
--- /dev/null
+// Formatting library for C++ - std::ostream support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OSTREAM_H_
+#define FMT_OSTREAM_H_
+
+#include <fstream> // std::filebuf
+
+#if defined(_WIN32) && defined(__GLIBCXX__)
+# include <ext/stdio_filebuf.h>
+# include <ext/stdio_sync_filebuf.h>
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+# include <__std_stream>
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+// Generate a unique explicit instantion in every translation unit using a tag
+// type in an anonymous namespace.
+namespace {
+struct file_access_tag {};
+} // namespace
+template <typename Tag, typename BufType, FILE* BufType::*FileMemberPtr>
+class file_access {
+ friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
+};
+
+#if FMT_MSC_VERSION
+template class file_access<file_access_tag, std::filebuf,
+ &std::filebuf::_Myfile>;
+auto get_file(std::filebuf&) -> FILE*;
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+template class file_access<file_access_tag, std::__stdoutbuf<char>,
+ &std::__stdoutbuf<char>::__file_>;
+auto get_file(std::__stdoutbuf<char>&) -> FILE*;
+#endif
+
+inline bool write_ostream_unicode(std::ostream& os, fmt::string_view data) {
+#if FMT_MSC_VERSION
+ if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#elif defined(_WIN32) && defined(__GLIBCXX__)
+ auto* rdbuf = os.rdbuf();
+ FILE* c_file;
+ if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
+ c_file = sfbuf->file();
+ else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
+ c_file = fbuf->file();
+ else
+ return false;
+ if (c_file) return write_console(c_file, data);
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+ if (auto* buf = dynamic_cast<std::__stdoutbuf<char>*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#else
+ ignore_unused(os, data);
+#endif
+ return false;
+}
+inline bool write_ostream_unicode(std::wostream&,
+ fmt::basic_string_view<wchar_t>) {
+ return false;
+}
+
+// Write the content of buf to os.
+// It is a separate function rather than a part of vprint to simplify testing.
+template <typename Char>
+void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
+ const Char* buf_data = buf.data();
+ using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
+ unsigned_streamsize size = buf.size();
+ unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
+ do {
+ unsigned_streamsize n = size <= max_size ? size : max_size;
+ os.write(buf_data, static_cast<std::streamsize>(n));
+ buf_data += n;
+ size -= n;
+ } while (size != 0);
+}
+
+template <typename Char, typename T>
+void format_value(buffer<Char>& buf, const T& value,
+ locale_ref loc = locale_ref()) {
+ auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+ auto&& output = std::basic_ostream<Char>(&format_buf);
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+ if (loc) output.imbue(loc.get<std::locale>());
+#endif
+ output << value;
+ output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+}
+
+template <typename T> struct streamed_view { const T& value; };
+
+} // namespace detail
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename Char>
+struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
+ void set_debug_format() = delete;
+
+ template <typename T, typename OutputIt>
+ auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
+ -> OutputIt {
+ auto buffer = basic_memory_buffer<Char>();
+ detail::format_value(buffer, value, ctx.locale());
+ return formatter<basic_string_view<Char>, Char>::format(
+ {buffer.data(), buffer.size()}, ctx);
+ }
+};
+
+using ostream_formatter = basic_ostream_formatter<char>;
+
+template <typename T, typename Char>
+struct formatter<detail::streamed_view<T>, Char>
+ : basic_ostream_formatter<Char> {
+ template <typename OutputIt>
+ auto format(detail::streamed_view<T> view,
+ basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ return basic_ostream_formatter<Char>::format(view.value, ctx);
+ }
+};
+
+/**
+ \rst
+ Returns a view that formats `value` via an ostream ``operator<<``.
+
+ **Example**::
+
+ fmt::print("Current thread id: {}\n",
+ fmt::streamed(std::this_thread::get_id()));
+ \endrst
+ */
+template <typename T>
+auto streamed(const T& value) -> detail::streamed_view<T> {
+ return {value};
+}
+
+namespace detail {
+
+inline void vprint_directly(std::ostream& os, string_view format_str,
+ format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, format_str, args);
+ detail::write_buffer(os, buffer);
+}
+
+} // namespace detail
+
+FMT_EXPORT template <typename Char>
+void vprint(std::basic_ostream<Char>& os,
+ basic_string_view<type_identity_t<Char>> format_str,
+ basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+ auto buffer = basic_memory_buffer<Char>();
+ detail::vformat_to(buffer, format_str, args);
+ if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
+ detail::write_buffer(os, buffer);
+}
+
+/**
+ \rst
+ Prints formatted data to the stream *os*.
+
+ **Example**::
+
+ fmt::print(cerr, "Don't {}!", "panic");
+ \endrst
+ */
+FMT_EXPORT template <typename... T>
+void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ const auto& vargs = fmt::make_format_args(args...);
+ if (detail::is_utf8())
+ vprint(os, fmt, vargs);
+ else
+ detail::vprint_directly(os, fmt, vargs);
+}
+
+FMT_EXPORT
+template <typename... Args>
+void print(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
+}
+
+FMT_EXPORT template <typename... T>
+void println(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ fmt::print(os, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
+}
+
+FMT_EXPORT
+template <typename... Args>
+void println(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ print(os, L"{}\n", fmt::format(fmt, std::forward<Args>(args)...));
+}
+
+FMT_END_NAMESPACE
+
+#endif // FMT_OSTREAM_H_
--- /dev/null
+// Formatting library for C++ - formatters for standard library types
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_STD_H_
+#define FMT_STD_H_
+
+#include <cstdlib>
+#include <exception>
+#include <memory>
+#include <thread>
+#include <type_traits>
+#include <typeinfo>
+#include <utility>
+
+#include "format.h"
+#include "ostream.h"
+
+#if FMT_HAS_INCLUDE(<version>)
+# include <version>
+#endif
+// Checking FMT_CPLUSPLUS for warning suppression in MSVC.
+#if FMT_CPLUSPLUS >= 201703L
+# if FMT_HAS_INCLUDE(<filesystem>)
+# include <filesystem>
+# endif
+# if FMT_HAS_INCLUDE(<variant>)
+# include <variant>
+# endif
+# if FMT_HAS_INCLUDE(<optional>)
+# include <optional>
+# endif
+#endif
+
+// GCC 4 does not support FMT_HAS_INCLUDE.
+#if FMT_HAS_INCLUDE(<cxxabi.h>) || defined(__GLIBCXX__)
+# include <cxxabi.h>
+// Android NDK with gabi++ library on some architectures does not implement
+// abi::__cxa_demangle().
+# ifndef __GABIXX_CXXABI_H__
+# define FMT_HAS_ABI_CXA_DEMANGLE
+# endif
+#endif
+
+// Check if typeid is available.
+#ifndef FMT_USE_TYPEID
+// __RTTI is for EDG compilers. In MSVC typeid is available without RTTI.
+# if defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || FMT_MSC_VERSION || \
+ defined(__INTEL_RTTI__) || defined(__RTTI)
+# define FMT_USE_TYPEID 1
+# else
+# define FMT_USE_TYPEID 0
+# endif
+#endif
+
+#ifdef __cpp_lib_filesystem
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename Char> auto get_path_string(const std::filesystem::path& p) {
+ return p.string<Char>();
+}
+
+template <typename Char>
+void write_escaped_path(basic_memory_buffer<Char>& quoted,
+ const std::filesystem::path& p) {
+ write_escaped_string<Char>(std::back_inserter(quoted), p.string<Char>());
+}
+
+# ifdef _WIN32
+template <>
+inline auto get_path_string<char>(const std::filesystem::path& p) {
+ return to_utf8<wchar_t>(p.native(), to_utf8_error_policy::replace);
+}
+
+template <>
+inline void write_escaped_path<char>(memory_buffer& quoted,
+ const std::filesystem::path& p) {
+ auto buf = basic_memory_buffer<wchar_t>();
+ write_escaped_string<wchar_t>(std::back_inserter(buf), p.native());
+ bool valid = to_utf8<wchar_t>::convert(quoted, {buf.data(), buf.size()});
+ FMT_ASSERT(valid, "invalid utf16");
+}
+# endif // _WIN32
+
+template <>
+inline void write_escaped_path<std::filesystem::path::value_type>(
+ basic_memory_buffer<std::filesystem::path::value_type>& quoted,
+ const std::filesystem::path& p) {
+ write_escaped_string<std::filesystem::path::value_type>(
+ std::back_inserter(quoted), p.native());
+}
+
+} // namespace detail
+
+FMT_EXPORT
+template <typename Char> struct formatter<std::filesystem::path, Char> {
+ private:
+ format_specs<Char> specs_;
+ detail::arg_ref<Char> width_ref_;
+ bool debug_ = false;
+
+ public:
+ FMT_CONSTEXPR void set_debug_format(bool set = true) { debug_ = set; }
+
+ template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+ auto it = ctx.begin(), end = ctx.end();
+ if (it == end) return it;
+
+ it = detail::parse_align(it, end, specs_);
+ if (it == end) return it;
+
+ it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx);
+ if (it != end && *it == '?') {
+ debug_ = true;
+ ++it;
+ }
+ return it;
+ }
+
+ template <typename FormatContext>
+ auto format(const std::filesystem::path& p, FormatContext& ctx) const {
+ auto specs = specs_;
+ detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref_,
+ ctx);
+ if (!debug_) {
+ auto s = detail::get_path_string<Char>(p);
+ return detail::write(ctx.out(), basic_string_view<Char>(s), specs);
+ }
+ auto quoted = basic_memory_buffer<Char>();
+ detail::write_escaped_path(quoted, p);
+ return detail::write(ctx.out(),
+ basic_string_view<Char>(quoted.data(), quoted.size()),
+ specs);
+ }
+};
+FMT_END_NAMESPACE
+#endif
+
+FMT_BEGIN_NAMESPACE
+FMT_EXPORT
+template <typename Char>
+struct formatter<std::thread::id, Char> : basic_ostream_formatter<Char> {};
+FMT_END_NAMESPACE
+
+#ifdef __cpp_lib_optional
+FMT_BEGIN_NAMESPACE
+FMT_EXPORT
+template <typename T, typename Char>
+struct formatter<std::optional<T>, Char,
+ std::enable_if_t<is_formattable<T, Char>::value>> {
+ private:
+ formatter<T, Char> underlying_;
+ static constexpr basic_string_view<Char> optional =
+ detail::string_literal<Char, 'o', 'p', 't', 'i', 'o', 'n', 'a', 'l',
+ '('>{};
+ static constexpr basic_string_view<Char> none =
+ detail::string_literal<Char, 'n', 'o', 'n', 'e'>{};
+
+ template <class U>
+ FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, bool set)
+ -> decltype(u.set_debug_format(set)) {
+ u.set_debug_format(set);
+ }
+
+ template <class U>
+ FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {}
+
+ public:
+ template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
+ maybe_set_debug_format(underlying_, true);
+ return underlying_.parse(ctx);
+ }
+
+ template <typename FormatContext>
+ auto format(std::optional<T> const& opt, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ if (!opt) return detail::write<Char>(ctx.out(), none);
+
+ auto out = ctx.out();
+ out = detail::write<Char>(out, optional);
+ ctx.advance_to(out);
+ out = underlying_.format(*opt, ctx);
+ return detail::write(out, ')');
+ }
+};
+FMT_END_NAMESPACE
+#endif // __cpp_lib_optional
+
+#ifdef __cpp_lib_variant
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename T>
+using variant_index_sequence =
+ std::make_index_sequence<std::variant_size<T>::value>;
+
+template <typename> struct is_variant_like_ : std::false_type {};
+template <typename... Types>
+struct is_variant_like_<std::variant<Types...>> : std::true_type {};
+
+// formattable element check.
+template <typename T, typename C> class is_variant_formattable_ {
+ template <std::size_t... Is>
+ static std::conjunction<
+ is_formattable<std::variant_alternative_t<Is, T>, C>...>
+ check(std::index_sequence<Is...>);
+
+ public:
+ static constexpr const bool value =
+ decltype(check(variant_index_sequence<T>{}))::value;
+};
+
+template <typename Char, typename OutputIt, typename T>
+auto write_variant_alternative(OutputIt out, const T& v) -> OutputIt {
+ if constexpr (is_string<T>::value)
+ return write_escaped_string<Char>(out, detail::to_string_view(v));
+ else if constexpr (std::is_same_v<T, Char>)
+ return write_escaped_char(out, v);
+ else
+ return write<Char>(out, v);
+}
+
+} // namespace detail
+
+template <typename T> struct is_variant_like {
+ static constexpr const bool value = detail::is_variant_like_<T>::value;
+};
+
+template <typename T, typename C> struct is_variant_formattable {
+ static constexpr const bool value =
+ detail::is_variant_formattable_<T, C>::value;
+};
+
+FMT_EXPORT
+template <typename Char> struct formatter<std::monostate, Char> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename FormatContext>
+ auto format(const std::monostate&, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ return detail::write<Char>(ctx.out(), "monostate");
+ }
+};
+
+FMT_EXPORT
+template <typename Variant, typename Char>
+struct formatter<
+ Variant, Char,
+ std::enable_if_t<std::conjunction_v<
+ is_variant_like<Variant>, is_variant_formattable<Variant, Char>>>> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename FormatContext>
+ auto format(const Variant& value, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto out = ctx.out();
+
+ out = detail::write<Char>(out, "variant(");
+ FMT_TRY {
+ std::visit(
+ [&](const auto& v) {
+ out = detail::write_variant_alternative<Char>(out, v);
+ },
+ value);
+ }
+ FMT_CATCH(const std::bad_variant_access&) {
+ detail::write<Char>(out, "valueless by exception");
+ }
+ *out++ = ')';
+ return out;
+ }
+};
+FMT_END_NAMESPACE
+#endif // __cpp_lib_variant
+
+FMT_BEGIN_NAMESPACE
+FMT_EXPORT
+template <typename Char> struct formatter<std::error_code, Char> {
+ template <typename ParseContext>
+ FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ return ctx.begin();
+ }
+
+ template <typename FormatContext>
+ FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
+ -> decltype(ctx.out()) {
+ auto out = ctx.out();
+ out = detail::write_bytes(out, ec.category().name(), format_specs<Char>());
+ out = detail::write<Char>(out, Char(':'));
+ out = detail::write<Char>(out, ec.value());
+ return out;
+ }
+};
+
+FMT_EXPORT
+template <typename T, typename Char>
+struct formatter<
+ T, Char,
+ typename std::enable_if<std::is_base_of<std::exception, T>::value>::type> {
+ private:
+ bool with_typename_ = false;
+
+ public:
+ FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ auto it = ctx.begin();
+ auto end = ctx.end();
+ if (it == end || *it == '}') return it;
+ if (*it == 't') {
+ ++it;
+ with_typename_ = FMT_USE_TYPEID != 0;
+ }
+ return it;
+ }
+
+ template <typename OutputIt>
+ auto format(const std::exception& ex,
+ basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ format_specs<Char> spec;
+ auto out = ctx.out();
+ if (!with_typename_)
+ return detail::write_bytes(out, string_view(ex.what()), spec);
+
+#if FMT_USE_TYPEID
+ const std::type_info& ti = typeid(ex);
+# ifdef FMT_HAS_ABI_CXA_DEMANGLE
+ int status = 0;
+ std::size_t size = 0;
+ std::unique_ptr<char, decltype(&std::free)> demangled_name_ptr(
+ abi::__cxa_demangle(ti.name(), nullptr, &size, &status), &std::free);
+
+ string_view demangled_name_view;
+ if (demangled_name_ptr) {
+ demangled_name_view = demangled_name_ptr.get();
+
+ // Normalization of stdlib inline namespace names.
+ // libc++ inline namespaces.
+ // std::__1::* -> std::*
+ // std::__1::__fs::* -> std::*
+ // libstdc++ inline namespaces.
+ // std::__cxx11::* -> std::*
+ // std::filesystem::__cxx11::* -> std::filesystem::*
+ if (demangled_name_view.starts_with("std::")) {
+ char* begin = demangled_name_ptr.get();
+ char* to = begin + 5; // std::
+ for (char *from = to, *end = begin + demangled_name_view.size();
+ from < end;) {
+ // This is safe, because demangled_name is NUL-terminated.
+ if (from[0] == '_' && from[1] == '_') {
+ char* next = from + 1;
+ while (next < end && *next != ':') next++;
+ if (next[0] == ':' && next[1] == ':') {
+ from = next + 2;
+ continue;
+ }
+ }
+ *to++ = *from++;
+ }
+ demangled_name_view = {begin, detail::to_unsigned(to - begin)};
+ }
+ } else {
+ demangled_name_view = string_view(ti.name());
+ }
+ out = detail::write_bytes(out, demangled_name_view, spec);
+# elif FMT_MSC_VERSION
+ string_view demangled_name_view(ti.name());
+ if (demangled_name_view.starts_with("class "))
+ demangled_name_view.remove_prefix(6);
+ else if (demangled_name_view.starts_with("struct "))
+ demangled_name_view.remove_prefix(7);
+ out = detail::write_bytes(out, demangled_name_view, spec);
+# else
+ out = detail::write_bytes(out, string_view(ti.name()), spec);
+# endif
+ *out++ = ':';
+ *out++ = ' ';
+ return detail::write_bytes(out, string_view(ex.what()), spec);
+#endif
+ }
+};
+FMT_END_NAMESPACE
+
+#endif // FMT_STD_H_
FMT_BEGIN_NAMESPACE
namespace detail {
-// DEPRECATED!
-template <typename T = void> struct basic_data {
- FMT_API static constexpr const char digits[100][2] = {
- {'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'}};
- FMT_API static constexpr const char hex_digits[] = "0123456789abcdef";
- FMT_API static constexpr const char signs[4] = {0, '-', '+', ' '};
- FMT_API static constexpr const char left_padding_shifts[5] = {31, 31, 0, 1,
- 0};
- FMT_API static constexpr const char right_padding_shifts[5] = {0, 31, 0, 1,
- 0};
- FMT_API static constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
- 0x1000000u | ' '};
-};
-
-#ifdef FMT_SHARED
-// Required for -flto, -fivisibility=hidden and -shared to work
-extern template struct basic_data<void>;
-#endif
-
-#if __cplusplus < 201703L
-// DEPRECATED! These are here only for ABI compatiblity.
-template <typename T> constexpr const char basic_data<T>::digits[][2];
-template <typename T> constexpr const char basic_data<T>::hex_digits[];
-template <typename T> constexpr const char basic_data<T>::signs[];
-template <typename T> constexpr const char basic_data<T>::left_padding_shifts[];
-template <typename T>
-constexpr const char basic_data<T>::right_padding_shifts[];
-template <typename T> constexpr const unsigned basic_data<T>::prefixes[];
-#endif
-
-template <typename T>
-int format_float(char* buf, std::size_t size, const char* format, int precision,
- T value) {
-#ifdef FMT_FUZZ
- if (precision > 100000)
- throw std::runtime_error(
- "fuzz mode - avoid large allocation inside snprintf");
-#endif
- // Suppress the warning about nonliteral format string.
- int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
- return precision < 0 ? snprintf_ptr(buf, size, format, value)
- : snprintf_ptr(buf, size, format, precision, value);
-}
-
-template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
- FMT_NOEXCEPT;
-template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
- FMT_NOEXCEPT;
-} // namespace detail
-
-// Workaround a bug in MSVC2013 that prevents instantiation of format_float.
-int (*instantiate_format_float)(double, int, detail::float_specs,
- detail::buffer<char>&) = detail::format_float;
+template FMT_API auto dragonbox::to_decimal(float x) noexcept
+ -> dragonbox::decimal_fp<float>;
+template FMT_API auto dragonbox::to_decimal(double x) noexcept
+ -> dragonbox::decimal_fp<double>;
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template FMT_API detail::locale_ref::locale_ref(const std::locale& loc);
-template FMT_API std::locale detail::locale_ref::get<std::locale>() const;
+template FMT_API locale_ref::locale_ref(const std::locale& loc);
+template FMT_API auto locale_ref::get<std::locale>() const -> std::locale;
#endif
// Explicit instantiations for char.
-template FMT_API auto detail::thousands_sep_impl(locale_ref)
+template FMT_API auto thousands_sep_impl(locale_ref)
-> thousands_sep_result<char>;
-template FMT_API char detail::decimal_point_impl(locale_ref);
+template FMT_API auto decimal_point_impl(locale_ref) -> char;
-template FMT_API void detail::buffer<char>::append(const char*, const char*);
+template FMT_API void buffer<char>::append(const char*, const char*);
-// DEPRECATED!
-// There is no correspondent extern template in format.h because of
-// incompatibility between clang and gcc (#2377).
-template FMT_API void detail::vformat_to(
- detail::buffer<char>&, string_view,
- basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);
-
-template FMT_API int detail::snprintf_float(double, int, detail::float_specs,
- detail::buffer<char>&);
-template FMT_API int detail::snprintf_float(long double, int,
- detail::float_specs,
- detail::buffer<char>&);
-template FMT_API int detail::format_float(double, int, detail::float_specs,
- detail::buffer<char>&);
-template FMT_API int detail::format_float(long double, int, detail::float_specs,
- detail::buffer<char>&);
+template FMT_API void vformat_to(buffer<char>&, string_view,
+ typename vformat_args<>::type, locale_ref);
// Explicit instantiations for wchar_t.
-template FMT_API auto detail::thousands_sep_impl(locale_ref)
+template FMT_API auto thousands_sep_impl(locale_ref)
-> thousands_sep_result<wchar_t>;
-template FMT_API wchar_t detail::decimal_point_impl(locale_ref);
-
-template FMT_API void detail::buffer<wchar_t>::append(const wchar_t*,
- const wchar_t*);
+template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
-template struct detail::basic_data<void>;
+template FMT_API void buffer<wchar_t>::append(const wchar_t*, const wchar_t*);
+} // namespace detail
FMT_END_NAMESPACE
projects / thirdparty / ccache.git / commitdiff
