+++ /dev/null
-/*
- 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 <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::bit_cast
-#endif
-
-#include "core.h"
-
-#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
-# define FMT_INLINE_VARIABLE inline
-#else
-# define FMT_INLINE_VARIABLE
-#endif
-
-#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
-# define FMT_FALLTHROUGH [[fallthrough]]
-#elif defined(__clang__)
-# define FMT_FALLTHROUGH [[clang::fallthrough]]
-#elif FMT_GCC_VERSION >= 700 && \
- (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
-# define FMT_FALLTHROUGH [[gnu::fallthrough]]
-#else
-# define FMT_FALLTHROUGH
-#endif
-
-#ifndef FMT_DEPRECATED
-# if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900
-# define FMT_DEPRECATED [[deprecated]]
-# else
-# if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
-# define FMT_DEPRECATED __attribute__((deprecated))
-# elif FMT_MSC_VERSION
-# define FMT_DEPRECATED __declspec(deprecated)
-# else
-# define FMT_DEPRECATED /* deprecated */
-# endif
-# endif
-#endif
-
-#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]]
-// VS2019 v16.10 and later except clang-cl (https://reviews.llvm.org/D110485)
-# elif (FMT_MSC_VERSION >= 1929) && !FMT_CLANG_VERSION
-# define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
-# endif
-# endif
-#endif
-#ifndef FMT_NO_UNIQUE_ADDRESS
-# define FMT_NO_UNIQUE_ADDRESS
-#endif
-
-// Visibility when compiled as a shared library/object.
-#if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
-# define FMT_SO_VISIBILITY(value) FMT_VISIBILITY(value)
-#else
-# define FMT_SO_VISIBILITY(value)
-#endif
-
-#ifdef __has_builtin
-# define FMT_HAS_BUILTIN(x) __has_builtin(x)
-#else
-# define FMT_HAS_BUILTIN(x) 0
-#endif
-
-#if FMT_GCC_VERSION || FMT_CLANG_VERSION
-# define FMT_NOINLINE __attribute__((noinline))
-#else
-# define FMT_NOINLINE
-#endif
-
-#ifndef FMT_THROW
-# if FMT_EXCEPTIONS
-# if FMT_MSC_VERSION || defined(__NVCC__)
-FMT_BEGIN_NAMESPACE
-namespace detail {
-template <typename Exception> inline void do_throw(const Exception& x) {
- // Silence unreachable code warnings in MSVC and NVCC because these
- // are nearly impossible to fix in a generic code.
- volatile bool b = true;
- if (b) throw x;
-}
-} // namespace detail
-FMT_END_NAMESPACE
-# define FMT_THROW(x) detail::do_throw(x)
-# else
-# define FMT_THROW(x) throw x
-# endif
-# else
-# define FMT_THROW(x) \
- ::fmt::detail::assert_fail(__FILE__, __LINE__, (x).what())
-# endif
-#endif
-
-#if FMT_EXCEPTIONS
-# define FMT_TRY try
-# define FMT_CATCH(x) catch (x)
-#else
-# define FMT_TRY if (true)
-# define FMT_CATCH(x) if (false)
-#endif
-
-#ifndef FMT_MAYBE_UNUSED
-# if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
-# define FMT_MAYBE_UNUSED [[maybe_unused]]
-# else
-# define FMT_MAYBE_UNUSED
-# endif
-#endif
-
-#ifndef FMT_USE_USER_DEFINED_LITERALS
-// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
-//
-// GCC before 4.9 requires a space in `operator"" _a` which is invalid in later
-// compiler versions.
-# if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 409 || \
- FMT_MSC_VERSION >= 1900) && \
- (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
-# define FMT_USE_USER_DEFINED_LITERALS 1
-# else
-# define FMT_USE_USER_DEFINED_LITERALS 0
-# endif
-#endif
-
-// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
-// integer formatter template instantiations to just one by only using the
-// largest integer type. This results in a reduction in binary size but will
-// cause a decrease in integer formatting performance.
-#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
-# define FMT_REDUCE_INT_INSTANTIATIONS 0
-#endif
-
-// __builtin_clz is broken in clang with Microsoft CodeGen:
-// https://github.com/fmtlib/fmt/issues/519.
-#if !FMT_MSC_VERSION
-# if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
-# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
-# endif
-# if FMT_HAS_BUILTIN(__builtin_clzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
-# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
-# endif
-#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 || \
- defined(__NVCOMPILER)
-# define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
-# endif
-# 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_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_VERSION && !defined(FMT_BUILTIN_CLZLL) && \
- !defined(FMT_BUILTIN_CTZLL)
-FMT_BEGIN_NAMESPACE
-namespace detail {
-// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
-# if !defined(__clang__)
-# pragma intrinsic(_BitScanForward)
-# pragma intrinsic(_BitScanReverse)
-# if defined(_WIN64)
-# pragma intrinsic(_BitScanForward64)
-# pragma intrinsic(_BitScanReverse64)
-# endif
-# endif
-
-inline auto clz(uint32_t x) -> int {
- unsigned long r = 0;
- _BitScanReverse(&r, x);
- FMT_ASSERT(x != 0, "");
- // Static analysis complains about using uninitialized data
- // "r", but the only way that can happen is if "x" is 0,
- // which the callers guarantee to not happen.
- FMT_MSC_WARNING(suppress : 6102)
- return 31 ^ static_cast<int>(r);
-}
-# define FMT_BUILTIN_CLZ(n) detail::clz(n)
-
-inline auto clzll(uint64_t x) -> int {
- unsigned long r = 0;
-# ifdef _WIN64
- _BitScanReverse64(&r, x);
-# else
- // Scan the high 32 bits.
- if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
- return 63 ^ static_cast<int>(r + 32);
- // Scan the low 32 bits.
- _BitScanReverse(&r, static_cast<uint32_t>(x));
-# endif
- FMT_ASSERT(x != 0, "");
- FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
- return 63 ^ static_cast<int>(r);
-}
-# define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
-
-inline auto ctz(uint32_t x) -> int {
- unsigned long r = 0;
- _BitScanForward(&r, x);
- FMT_ASSERT(x != 0, "");
- FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
- return static_cast<int>(r);
-}
-# define FMT_BUILTIN_CTZ(n) detail::ctz(n)
-
-inline auto ctzll(uint64_t x) -> int {
- unsigned long r = 0;
- FMT_ASSERT(x != 0, "");
- FMT_MSC_WARNING(suppress : 6102) // Suppress a bogus static analysis warning.
-# ifdef _WIN64
- _BitScanForward64(&r, x);
-# else
- // Scan the low 32 bits.
- if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
- // Scan the high 32 bits.
- _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
- r += 32;
-# endif
- return static_cast<int>(r);
-}
-# define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
-} // namespace detail
-FMT_END_NAMESPACE
-#endif
-
-FMT_BEGIN_NAMESPACE
-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
-
-// Implementation of std::bit_cast for pre-C++20.
-template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) == sizeof(From))>
-FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
-#ifdef __cpp_lib_bit_cast
- if (is_constant_evaluated()) return std::bit_cast<To>(from);
-#endif
- auto to = To();
- // The cast suppresses a bogus -Wclass-memaccess on GCC.
- std::memcpy(static_cast<void*>(&to), &from, sizeof(to));
- return to;
-}
-
-inline auto is_big_endian() -> bool {
-#ifdef _WIN32
- return false;
-#elif defined(__BIG_ENDIAN__)
- return true;
-#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
- return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__;
-#else
- struct bytes {
- char data[sizeof(int)];
- };
- return bit_cast<bytes>(1).data[0] == 0;
-#endif
-}
-
-class uint128_fallback {
- private:
- uint64_t lo_, hi_;
-
- 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 auto high() const noexcept -> uint64_t { return hi_; }
- constexpr auto low() const noexcept -> uint64_t { return lo_; }
-
- template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
- constexpr explicit operator T() const {
- return static_cast<T>(lo_);
- }
-
- friend constexpr auto operator==(const uint128_fallback& lhs,
- const uint128_fallback& rhs) -> bool {
- return lhs.hi_ == rhs.hi_ && lhs.lo_ == rhs.lo_;
- }
- friend constexpr auto operator!=(const uint128_fallback& lhs,
- const uint128_fallback& rhs) -> bool {
- return !(lhs == rhs);
- }
- friend constexpr auto operator>(const uint128_fallback& lhs,
- const uint128_fallback& rhs) -> bool {
- return lhs.hi_ != rhs.hi_ ? lhs.hi_ > rhs.hi_ : lhs.lo_ > rhs.lo_;
- }
- friend constexpr auto operator|(const uint128_fallback& lhs,
- const uint128_fallback& rhs)
- -> uint128_fallback {
- return {lhs.hi_ | rhs.hi_, lhs.lo_ | rhs.lo_};
- }
- friend constexpr auto operator&(const uint128_fallback& lhs,
- const uint128_fallback& rhs)
- -> uint128_fallback {
- return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
- }
- friend constexpr auto operator~(const uint128_fallback& n)
- -> uint128_fallback {
- return {~n.hi_, ~n.lo_};
- }
- friend auto operator+(const uint128_fallback& lhs,
- const uint128_fallback& rhs) -> uint128_fallback {
- auto result = uint128_fallback(lhs);
- result += rhs;
- return result;
- }
- friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
- -> uint128_fallback {
- FMT_ASSERT(lhs.hi_ == 0, "");
- uint64_t hi = (lhs.lo_ >> 32) * rhs;
- uint64_t lo = (lhs.lo_ & ~uint32_t()) * rhs;
- uint64_t new_lo = (hi << 32) + lo;
- return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo};
- }
- friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
- -> uint128_fallback {
- return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs};
- }
- FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback {
- if (shift == 64) return {0, hi_};
- if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64);
- return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)};
- }
- FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback {
- if (shift == 64) return {lo_, 0};
- if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64);
- return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)};
- }
- FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& {
- return *this = *this >> shift;
- }
- FMT_CONSTEXPR void operator+=(uint128_fallback n) {
- uint64_t new_lo = lo_ + n.lo_;
- uint64_t new_hi = hi_ + n.hi_ + (new_lo < lo_ ? 1 : 0);
- FMT_ASSERT(new_hi >= hi_, "");
- lo_ = new_lo;
- hi_ = new_hi;
- }
- FMT_CONSTEXPR void operator&=(uint128_fallback n) {
- lo_ &= n.lo_;
- hi_ &= n.hi_;
- }
-
- FMT_CONSTEXPR20 auto operator+=(uint64_t n) noexcept -> uint128_fallback& {
- 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;
-#else
-using uintptr_t = uint128_t;
-#endif
-
-// Returns the largest possible value for type T. Same as
-// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
-template <typename T> constexpr auto max_value() -> T {
- return (std::numeric_limits<T>::max)();
-}
-template <typename T> constexpr auto num_bits() -> int {
- return std::numeric_limits<T>::digits;
-}
-// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
-template <> constexpr auto num_bits<int128_opt>() -> int { return 128; }
-template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
-
-// 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) && !FMT_ICC_VERSION
- __builtin_assume(condition);
-#elif FMT_GCC_VERSION
- if (!condition) __builtin_unreachable();
-#endif
-}
-
-// An approximation of iterator_t for pre-C++20 systems.
-template <typename T>
-using iterator_t = decltype(std::begin(std::declval<T&>()));
-template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
-
-// A workaround for std::string not having mutable data() until C++17.
-template <typename Char>
-inline auto get_data(std::basic_string<Char>& s) -> Char* {
- return &s[0];
-}
-template <typename Container>
-inline auto get_data(Container& c) -> typename Container::value_type* {
- return c.data();
-}
-
-// 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)>
-#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
-__attribute__((no_sanitize("undefined")))
-#endif
-inline auto
-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 get_data(c) + size;
-}
-
-template <typename T>
-inline auto reserve(buffer_appender<T> it, size_t n) -> buffer_appender<T> {
- buffer<T>& buf = get_container(it);
- buf.try_reserve(buf.size() + n);
- return it;
-}
-
-template <typename Iterator>
-constexpr auto reserve(Iterator& it, size_t) -> Iterator& {
- return it;
-}
-
-template <typename OutputIt>
-using reserve_iterator =
- remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
-
-template <typename T, typename OutputIt>
-constexpr auto to_pointer(OutputIt, size_t) -> T* {
- return nullptr;
-}
-template <typename T> auto to_pointer(buffer_appender<T> it, size_t n) -> T* {
- buffer<T>& buf = get_container(it);
- auto size = buf.size();
- if (buf.capacity() < size + n) return nullptr;
- buf.try_resize(size + n);
- return buf.data() + size;
-}
-
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-inline auto base_iterator(std::back_insert_iterator<Container> it,
- typename Container::value_type*)
- -> std::back_insert_iterator<Container> {
- return it;
-}
-
-template <typename Iterator>
-constexpr auto base_iterator(Iterator, Iterator it) -> Iterator {
- return it;
-}
-
-// <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
-// instead (#1998).
-template <typename OutputIt, typename Size, typename T>
-FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value)
- -> OutputIt {
- for (Size i = 0; i < count; ++i) *out++ = value;
- return out;
-}
-template <typename T, typename Size>
-FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
- if (is_constant_evaluated()) {
- return fill_n<T*, Size, T>(out, count, value);
- }
- std::memset(out, value, to_unsigned(count));
- return out + count;
-}
-
-#ifdef __cpp_char8_t
-using char8_type = char8_t;
-#else
-enum char8_type : unsigned char {};
-#endif
-
-template <typename OutChar, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end,
- OutputIt out) -> OutputIt {
- return copy_str<OutChar>(begin, end, out);
-}
-
-// A public domain branchless UTF-8 decoder by Christopher Wellons:
-// https://github.com/skeeto/branchless-utf8
-/* Decode the next character, c, from s, reporting errors in e.
- *
- * Since this is a branchless decoder, four bytes will be read from the
- * buffer regardless of the actual length of the next character. This
- * means the buffer _must_ have at least three bytes of zero padding
- * following the end of the data stream.
- *
- * Errors are reported in e, which will be non-zero if the parsed
- * character was somehow invalid: invalid byte sequence, non-canonical
- * encoding, or a surrogate half.
- *
- * The function returns a pointer to the next character. When an error
- * occurs, this pointer will be a guess that depends on the particular
- * error, but it will always advance at least one byte.
- */
-FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
- -> const char* {
- constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
- constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
- constexpr const int shiftc[] = {0, 18, 12, 6, 0};
- constexpr const int shifte[] = {0, 6, 4, 2, 0};
-
- 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(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.
- *e = (*c < mins[len]) << 6; // non-canonical encoding
- *e |= ((*c >> 11) == 0x1b) << 7; // surrogate half?
- *e |= (*c > 0x10FFFF) << 8; // out of range?
- *e |= (uchar(s[1]) & 0xc0) >> 2;
- *e |= (uchar(s[2]) & 0xc0) >> 4;
- *e |= uchar(s[3]) >> 6;
- *e ^= 0x2a; // top two bits of each tail byte correct?
- *e >>= shifte[len];
-
- return next;
-}
-
-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.
-template <typename F>
-FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
- auto decode = [f](const char* buf_ptr, const char* ptr) {
- auto cp = uint32_t();
- auto error = 0;
- auto end = utf8_decode(buf_ptr, &cp, &error);
- bool result = f(error ? invalid_code_point : cp,
- 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.
- if (s.size() >= block_size) {
- for (auto end = p + s.size() - block_size + 1; p < end;) {
- p = decode(p, p);
- if (!p) return;
- }
- }
- if (auto num_chars_left = s.data() + s.size() - p) {
- char buf[2 * block_size - 1] = {};
- copy_str<char>(p, p + num_chars_left, buf);
- const char* buf_ptr = buf;
- do {
- auto end = decode(buf_ptr, p);
- if (!end) return;
- p += end - buf_ptr;
- buf_ptr = end;
- } while (buf_ptr - buf < num_chars_left);
- }
-}
-
-template <typename Char>
-inline auto compute_width(basic_string_view<Char> s) -> size_t {
- return s.size();
-}
-
-// Computes approximate display width of a UTF-8 string.
-FMT_CONSTEXPR inline auto compute_width(string_view s) -> size_t {
- size_t num_code_points = 0;
- // It is not a lambda for compatibility with C++14.
- struct count_code_points {
- size_t* count;
- FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool {
- *count += detail::to_unsigned(
- 1 +
- (cp >= 0x1100 &&
- (cp <= 0x115f || // Hangul Jamo init. consonants
- cp == 0x2329 || // LEFT-POINTING ANGLE BRACKET
- cp == 0x232a || // RIGHT-POINTING ANGLE BRACKET
- // CJK ... Yi except IDEOGRAPHIC HALF FILL SPACE:
- (cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) ||
- (cp >= 0xac00 && cp <= 0xd7a3) || // Hangul Syllables
- (cp >= 0xf900 && cp <= 0xfaff) || // CJK Compatibility Ideographs
- (cp >= 0xfe10 && cp <= 0xfe19) || // Vertical Forms
- (cp >= 0xfe30 && cp <= 0xfe6f) || // CJK Compatibility Forms
- (cp >= 0xff00 && cp <= 0xff60) || // Fullwidth Forms
- (cp >= 0xffe0 && cp <= 0xffe6) || // Fullwidth Forms
- (cp >= 0x20000 && cp <= 0x2fffd) || // CJK
- (cp >= 0x30000 && cp <= 0x3fffd) ||
- // Miscellaneous Symbols and Pictographs + Emoticons:
- (cp >= 0x1f300 && cp <= 0x1f64f) ||
- // Supplemental Symbols and Pictographs:
- (cp >= 0x1f900 && cp <= 0x1f9ff))));
- 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(
- string_view(reinterpret_cast<const char*>(s.data()), s.size()));
-}
-
-template <typename Char>
-inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
- size_t size = s.size();
- return n < size ? n : size;
-}
-
-// Calculates the index of the nth code point in a UTF-8 string.
-inline auto code_point_index(string_view s, size_t n) -> size_t {
- size_t result = s.size();
- const char* begin = s.begin();
- for_each_codepoint(s, [begin, &n, &result](uint32_t, string_view sv) {
- if (n != 0) {
- --n;
- return true;
- }
- result = to_unsigned(sv.begin() - begin);
- return false;
- });
- return result;
-}
-
-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
-
-template <typename T>
-template <typename U>
-void buffer<T>::append(const U* begin, const U* end) {
- while (begin != end) {
- auto count = to_unsigned(end - begin);
- try_reserve(size_ + count);
- auto free_cap = capacity_ - size_;
- if (free_cap < count) count = free_cap;
- std::uninitialized_copy_n(begin, count, ptr_ + size_);
- size_ += count;
- begin += count;
- }
-}
-
-template <typename T, typename Enable = void>
-struct is_locale : std::false_type {};
-template <typename T>
-struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
-} // namespace detail
-
-FMT_BEGIN_EXPORT
-
-// The number of characters to store in the basic_memory_buffer object itself
-// to avoid dynamic memory allocation.
-enum { inline_buffer_size = 500 };
-
-/**
- \rst
- A dynamically growing memory buffer for trivially copyable/constructible types
- with the first ``SIZE`` elements stored in the object itself.
-
- You can use the ``memory_buffer`` type alias for ``char`` instead.
-
- **Example**::
-
- auto out = fmt::memory_buffer();
- fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
-
- This will append the following output to the ``out`` object:
-
- .. code-block:: none
-
- The answer is 42.
-
- The output can be converted to an ``std::string`` with ``to_string(out)``.
- \endrst
- */
-template <typename T, size_t SIZE = inline_buffer_size,
- typename Allocator = std::allocator<T>>
-class basic_memory_buffer final : public detail::buffer<T> {
- private:
- T store_[SIZE];
-
- // Don't inherit from Allocator to avoid generating type_info for it.
- FMT_NO_UNIQUE_ADDRESS Allocator alloc_;
-
- // Deallocate memory allocated by the buffer.
- FMT_CONSTEXPR20 void deallocate() {
- T* data = this->data();
- if (data != store_) alloc_.deallocate(data, this->capacity());
- }
-
- protected:
- 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;
- using const_reference = const T&;
-
- FMT_CONSTEXPR20 explicit basic_memory_buffer(
- const Allocator& alloc = Allocator())
- : alloc_(alloc) {
- this->set(store_, SIZE);
- if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T());
- }
- FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
-
- private:
- // Move data from other to this buffer.
- FMT_CONSTEXPR20 void move(basic_memory_buffer& other) {
- alloc_ = std::move(other.alloc_);
- T* data = other.data();
- size_t size = other.size(), capacity = other.capacity();
- if (data == other.store_) {
- this->set(store_, capacity);
- 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);
- }
-
- public:
- /**
- \rst
- Constructs a :class:`fmt::basic_memory_buffer` object moving the content
- of the other object to it.
- \endrst
- */
- FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept {
- move(other);
- }
-
- /**
- \rst
- Moves the content of the other ``basic_memory_buffer`` object to this one.
- \endrst
- */
- auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
- FMT_ASSERT(this != &other, "");
- deallocate();
- move(other);
- return *this;
- }
-
- // Returns a copy of the allocator associated with this buffer.
- auto get_allocator() const -> Allocator { return alloc_; }
-
- /**
- Resizes the buffer to contain *count* elements. If T is a POD type new
- elements may not be initialized.
- */
- FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
-
- /** Increases the buffer capacity to *new_capacity*. */
- void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
-
- using detail::buffer<T>::append;
- template <typename ContiguousRange>
- void append(const ContiguousRange& range) {
- append(range.data(), range.data() + range.size());
- }
-};
-
-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 auto write_console(int fd, string_view text) -> bool;
-FMT_API auto write_console(std::FILE* f, string_view text) -> bool;
-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
-
-/** An error reported from a formatting function. */
-class FMT_SO_VISIBILITY("default") format_error : public std::runtime_error {
- public:
- using std::runtime_error::runtime_error;
-};
-
-namespace detail_exported {
-#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] = {};
-};
-#endif
-
-// Converts a compile-time string to basic_string_view.
-template <typename Char, size_t N>
-constexpr auto compile_string_to_view(const Char (&s)[N])
- -> basic_string_view<Char> {
- // Remove trailing NUL character if needed. Won't be present if this is used
- // with a raw character array (i.e. not defined as a string).
- return {s, N - (std::char_traits<Char>::to_int_type(s[N - 1]) == 0 ? 1 : 0)};
-}
-template <typename Char>
-constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
- -> basic_string_view<Char> {
- return {s.data(), s.size()};
-}
-} // namespace detail_exported
-
-class loc_value {
- private:
- basic_format_arg<format_context> value_;
-
- public:
- template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
- loc_value(T value) : value_(detail::make_arg<format_context>(value)) {}
-
- template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
- loc_value(T) {}
-
- template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
- return visit_format_arg(vis, value_);
- }
-};
-
-// A locale facet that formats values in UTF-8.
-// It is parameterized on the locale to avoid the heavy <locale> include.
-template <typename Locale> class format_facet : public Locale::facet {
- private:
- std::string separator_;
- std::string grouping_;
- std::string decimal_point_;
-
- protected:
- virtual auto do_put(appender out, loc_value val,
- const format_specs<>& specs) const -> bool;
-
- public:
- static FMT_API typename Locale::id id;
-
- explicit format_facet(Locale& loc);
- explicit format_facet(string_view sep = "",
- std::initializer_list<unsigned char> g = {3},
- std::string decimal_point = ".")
- : separator_(sep.data(), sep.size()),
- grouping_(g.begin(), g.end()),
- decimal_point_(decimal_point) {}
-
- auto put(appender out, loc_value val, const format_specs<>& specs) const
- -> bool {
- return do_put(out, val, specs);
- }
-};
-
-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)>
-constexpr auto is_negative(T value) -> bool {
- return value < 0;
-}
-template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
-constexpr auto is_negative(T) -> bool {
- return false;
-}
-
-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
-// represent all values of an integral type T.
-template <typename T>
-using uint32_or_64_or_128_t =
- conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
- uint32_t,
- conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
-template <typename T>
-using uint64_or_128_t = conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>;
-
-#define FMT_POWERS_OF_10(factor) \
- factor * 10, (factor) * 100, (factor) * 1000, (factor) * 10000, \
- (factor) * 100000, (factor) * 1000000, (factor) * 10000000, \
- (factor) * 100000000, (factor) * 1000000000
-
-// Converts value in the range [0, 100) to a string.
-constexpr auto digits2(size_t value) -> const char* {
- // GCC generates slightly better code when value is pointer-size.
- return &"0001020304050607080910111213141516171819"
- "2021222324252627282930313233343536373839"
- "4041424344454647484950515253545556575859"
- "6061626364656667686970717273747576777879"
- "8081828384858687888990919293949596979899"[value * 2];
-}
-
-// Sign is a template parameter to workaround a bug in gcc 4.8.
-template <typename Char, typename Sign> constexpr auto sign(Sign s) -> Char {
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604
- static_assert(std::is_same<Sign, sign_t>::value, "");
-#endif
- return static_cast<Char>("\0-+ "[s]);
-}
-
-template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
- int count = 1;
- for (;;) {
- // Integer division is slow so do it for a group of four digits instead
- // of for every digit. The idea comes from the talk by Alexandrescu
- // "Three Optimization Tips for C++". See speed-test for a comparison.
- if (n < 10) return count;
- if (n < 100) return count + 1;
- if (n < 1000) return count + 2;
- if (n < 10000) return count + 3;
- n /= 10000u;
- count += 4;
- }
-}
-#if FMT_USE_INT128
-FMT_CONSTEXPR inline auto count_digits(uint128_opt n) -> int {
- return count_digits_fallback(n);
-}
-#endif
-
-#ifdef FMT_BUILTIN_CLZLL
-// It is a separate function rather than a part of count_digits to workaround
-// the lack of static constexpr in constexpr functions.
-inline auto do_count_digits(uint64_t n) -> int {
- // This has comparable performance to the version by Kendall Willets
- // (https://github.com/fmtlib/format-benchmark/blob/master/digits10)
- // but uses smaller tables.
- // Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
- static constexpr uint8_t bsr2log10[] = {
- 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5,
- 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 10,
- 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
- 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
- auto t = bsr2log10[FMT_BUILTIN_CLZLL(n | 1) ^ 63];
- static constexpr const uint64_t zero_or_powers_of_10[] = {
- 0, 0, FMT_POWERS_OF_10(1U), FMT_POWERS_OF_10(1000000000ULL),
- 10000000000000000000ULL};
- return t - (n < zero_or_powers_of_10[t]);
-}
-#endif
-
-// Returns the number of decimal digits in n. Leading zeros are not counted
-// except for n == 0 in which case count_digits returns 1.
-FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
-#ifdef FMT_BUILTIN_CLZLL
- if (!is_constant_evaluated()) {
- return do_count_digits(n);
- }
-#endif
- return count_digits_fallback(n);
-}
-
-// Counts the number of digits in n. BITS = log2(radix).
-template <int BITS, typename UInt>
-FMT_CONSTEXPR auto count_digits(UInt n) -> int {
-#ifdef FMT_BUILTIN_CLZ
- 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.
- return [](UInt m) {
- int num_digits = 0;
- do {
- ++num_digits;
- } while ((m >>= BITS) != 0);
- return num_digits;
- }(n);
-}
-
-#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)
- 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
- FMT_INC(100), FMT_INC(100), FMT_INC(100), // 512
- FMT_INC(1000), FMT_INC(1000), FMT_INC(1000), // 4096
- FMT_INC(10000), FMT_INC(10000), FMT_INC(10000), // 32k
- FMT_INC(100000), FMT_INC(100000), FMT_INC(100000), // 256k
- FMT_INC(1000000), FMT_INC(1000000), FMT_INC(1000000), // 2048k
- FMT_INC(10000000), FMT_INC(10000000), FMT_INC(10000000), // 16M
- FMT_INC(100000000), FMT_INC(100000000), FMT_INC(100000000), // 128M
- FMT_INC(1000000000), FMT_INC(1000000000), FMT_INC(1000000000), // 1024M
- FMT_INC(1000000000), FMT_INC(1000000000) // 4B
- };
- auto inc = table[FMT_BUILTIN_CLZ(n | 1) ^ 31];
- return static_cast<int>((n + inc) >> 32);
-}
-#endif
-
-// Optional version of count_digits for better performance on 32-bit platforms.
-FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
-#ifdef FMT_BUILTIN_CLZ
- if (!is_constant_evaluated()) {
- return do_count_digits(n);
- }
-#endif
- return count_digits_fallback(n);
-}
-
-template <typename Int> constexpr auto digits10() noexcept -> int {
- return std::numeric_limits<Int>::digits10;
-}
-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;
- Char thousands_sep;
-};
-
-template <typename Char>
-FMT_API auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char>;
-template <typename Char>
-inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<Char> {
- auto result = thousands_sep_impl<char>(loc);
- return {result.grouping, Char(result.thousands_sep)};
-}
-template <>
-inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<wchar_t> {
- return thousands_sep_impl<wchar_t>(loc);
-}
-
-template <typename Char>
-FMT_API auto decimal_point_impl(locale_ref loc) -> Char;
-template <typename Char> inline auto decimal_point(locale_ref loc) -> Char {
- return Char(decimal_point_impl<char>(loc));
-}
-template <> inline auto decimal_point(locale_ref loc) -> wchar_t {
- return decimal_point_impl<wchar_t>(loc);
-}
-
-// Compares two characters for equality.
-template <typename Char> auto equal2(const Char* lhs, const char* rhs) -> bool {
- return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]);
-}
-inline auto equal2(const char* lhs, const char* rhs) -> bool {
- return memcmp(lhs, rhs, 2) == 0;
-}
-
-// Copies two characters from src to dst.
-template <typename Char>
-FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) {
- if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) {
- memcpy(dst, src, 2);
- return;
- }
- *dst++ = static_cast<Char>(*src++);
- *dst = static_cast<Char>(*src);
-}
-
-template <typename Iterator> struct format_decimal_result {
- Iterator begin;
- Iterator end;
-};
-
-// Formats a decimal unsigned integer value writing into out pointing to a
-// buffer of specified size. The caller must ensure that the buffer is large
-// enough.
-template <typename Char, typename UInt>
-FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
- -> format_decimal_result<Char*> {
- FMT_ASSERT(size >= count_digits(value), "invalid digit count");
- out += size;
- Char* end = out;
- while (value >= 100) {
- // Integer division is slow so do it for a group of two digits instead
- // of for every digit. The idea comes from the talk by Alexandrescu
- // "Three Optimization Tips for C++". See speed-test for a comparison.
- out -= 2;
- copy2(out, digits2(static_cast<size_t>(value % 100)));
- value /= 100;
- }
- if (value < 10) {
- *--out = static_cast<Char>('0' + value);
- return {out, end};
- }
- out -= 2;
- copy2(out, digits2(static_cast<size_t>(value)));
- return {out, end};
-}
-
-template <typename Char, typename UInt, typename Iterator,
- FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
-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] = {};
- auto end = format_decimal(buffer, value, size).end;
- return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
-}
-
-template <unsigned BASE_BITS, typename Char, typename UInt>
-FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
- bool upper = false) -> Char* {
- buffer += num_digits;
- Char* end = buffer;
- do {
- const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
- 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, typename It, typename UInt>
-FMT_CONSTEXPR inline auto format_uint(It out, UInt value, int num_digits,
- bool upper = false) -> It {
- if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
- format_uint<BASE_BITS>(ptr, value, num_digits, upper);
- return out;
- }
- // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
- char buffer[num_bits<UInt>() / BASE_BITS + 1] = {};
- format_uint<BASE_BITS>(buffer, value, num_digits, upper);
- return detail::copy_str_noinline<Char>(buffer, buffer + num_digits, out);
-}
-
-// A converter from UTF-8 to UTF-16.
-class utf8_to_utf16 {
- private:
- basic_memory_buffer<wchar_t> buffer_;
-
- public:
- FMT_API explicit utf8_to_utf16(string_view s);
- operator basic_string_view<wchar_t>() const { return {&buffer_[0], size()}; }
- auto size() const -> size_t { return buffer_.size() - 1; }
- auto c_str() const -> const wchar_t* { return &buffer_[0]; }
- 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()); }
- auto size() const -> size_t { return buffer_.size() - 1; }
- auto c_str() const -> const char* { return &buffer_[0]; }
- auto str() const -> std::string { 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.
- auto convert(basic_string_view<WChar> s,
- to_utf8_error_policy policy = to_utf8_error_policy::abort)
- -> bool {
- if (!convert(buffer_, s, policy)) return false;
- buffer_.push_back(0);
- return true;
- }
- static auto convert(Buffer& buf, basic_string_view<WChar> s,
- to_utf8_error_policy policy = to_utf8_error_policy::abort)
- -> bool {
- 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("\xEF\xBF\xBD"));
- --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 auto umul128(uint64_t x, uint64_t y) noexcept -> uint128_fallback {
-#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 hi = uint64_t();
- auto lo = _umul128(x, y, &hi);
- return {hi, lo};
-#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 auto floor_log10_pow2(int e) noexcept -> int {
- FMT_ASSERT(e <= 2620 && e >= -2620, "too large exponent");
- static_assert((-1 >> 1) == -1, "right shift is not arithmetic");
- return (e * 315653) >> 20;
-}
-
-inline auto floor_log2_pow10(int e) noexcept -> int {
- 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 auto umul128_upper64(uint64_t x, uint64_t y) noexcept -> uint64_t {
-#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 auto umul192_upper128(uint64_t x, uint128_fallback y) noexcept
- -> uint128_fallback {
- uint128_fallback r = umul128(x, y.high());
- r += umul128_upper64(x, y.low());
- return r;
-}
-
-FMT_API auto get_cached_power(int k) noexcept -> uint128_fallback;
-
-// Type-specific information that Dragonbox uses.
-template <typename T, typename Enable = void> struct float_info;
-
-template <> struct float_info<float> {
- using carrier_uint = uint32_t;
- static const int exponent_bits = 8;
- 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 shorter_interval_tie_lower_threshold = -35;
- static const int shorter_interval_tie_upper_threshold = -35;
-};
-
-template <> struct float_info<double> {
- using carrier_uint = uint64_t;
- static const int exponent_bits = 11;
- 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 = 341;
- static const int shorter_interval_tie_lower_threshold = -77;
- static const int shorter_interval_tie_upper_threshold = -77;
-};
-
-// 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 {
- using significand_type = typename float_info<T>::carrier_uint;
- significand_type significand;
- int exponent;
-};
-
-template <typename T> FMT_API auto to_decimal(T x) noexcept -> decimal_fp<T>;
-} // namespace dragonbox
-
-// Returns true iff Float has the implicit bit which is not stored.
-template <typename Float> constexpr auto has_implicit_bit() -> bool {
- // 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 auto num_significand_bits() -> int {
- // 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<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.
-template <typename Char, typename It>
-FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
- FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
- if (exp < 0) {
- *it++ = static_cast<Char>('-');
- exp = -exp;
- } else {
- *it++ = static_cast<Char>('+');
- }
- if (exp >= 100) {
- const char* top = digits2(to_unsigned(exp / 100));
- if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
- *it++ = static_cast<Char>(top[1]);
- exp %= 100;
- }
- const char* d = digits2(to_unsigned(exp));
- *it++ = static_cast<Char>(d[0]);
- *it++ = static_cast<Char>(d[1]);
- return it;
-}
-
-// 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;
- }
-
- template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
- FMT_CONSTEXPR auto assign(Float n) -> bool {
- static_assert(std::numeric_limits<double>::is_iec559, "unsupported FP");
- return assign(static_cast<double>(n));
- }
-};
-
-using fp = basic_fp<unsigned long long>;
-
-// Normalizes the value converted from double and multiplied by (1 << SHIFT).
-template <int SHIFT = 0, typename F>
-FMT_CONSTEXPR auto normalize(basic_fp<F> value) -> basic_fp<F> {
- // 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;
-}
-
-// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
-FMT_CONSTEXPR inline auto multiply(uint64_t lhs, uint64_t rhs) -> uint64_t {
-#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 auto operator*(fp x, fp y) -> fp {
- return {multiply(x.f, y.f), x.e + y.e + 64};
-}
-
-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>
-FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
- const fill_t<Char>& fill) -> OutputIt {
- auto fill_size = fill.size();
- if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
- auto data = fill.data();
- for (size_t i = 0; i < n; ++i)
- it = copy_str<Char>(data, data + fill_size, it);
- return it;
-}
-
-// Writes the output of f, padded according to format specifications in specs.
-// size: output size in code units.
-// width: output display width in (terminal) column positions.
-template <align::type align = align::left, typename OutputIt, typename Char,
- typename F>
-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);
- size_t padding = spec_width > width ? spec_width - width : 0;
- // Shifts are encoded as string literals because static constexpr is not
- // supported in constexpr functions.
- auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
- size_t left_padding = padding >> shifts[specs.align];
- size_t right_padding = padding - left_padding;
- auto it = reserve(out, size + padding * specs.fill.size());
- if (left_padding != 0) it = fill(it, left_padding, specs.fill);
- it = f(it);
- if (right_padding != 0) it = fill(it, right_padding, specs.fill);
- return base_iterator(out, it);
-}
-
-template <align::type align = align::left, typename OutputIt, typename Char,
- typename F>
-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 format_specs<Char>& specs) -> OutputIt {
- return write_padded<align>(
- out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
- const char* data = bytes.data();
- return copy_str<Char>(data, data + bytes.size(), it);
- });
-}
-
-template <typename Char, typename OutputIt, typename UIntPtr>
-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) {
- *it++ = static_cast<Char>('0');
- *it++ = static_cast<Char>('x');
- return format_uint<4, Char>(it, value, num_digits);
- };
- return specs ? write_padded<align::right>(out, *specs, size, write)
- : base_iterator(out, write(reserve(out, size)));
-}
-
-// Returns true iff the code point cp is printable.
-FMT_API auto is_printable(uint32_t cp) -> bool;
-
-inline auto needs_escape(uint32_t cp) -> bool {
- return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
- !is_printable(cp);
-}
-
-template <typename Char> struct find_escape_result {
- const Char* begin;
- const Char* end;
- uint32_t cp;
-};
-
-template <typename Char>
-using make_unsigned_char =
- typename conditional_t<std::is_integral<Char>::value,
- std::make_unsigned<Char>,
- type_identity<uint32_t>>::type;
-
-template <typename Char>
-auto find_escape(const Char* begin, const Char* end)
- -> find_escape_result<Char> {
- for (; begin != end; ++begin) {
- uint32_t cp = static_cast<make_unsigned_char<Char>>(*begin);
- if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue;
- if (needs_escape(cp)) return {begin, begin + 1, cp};
- }
- return {begin, nullptr, 0};
-}
-
-inline auto find_escape(const char* begin, const char* end)
- -> find_escape_result<char> {
- if (!is_utf8()) return find_escape<char>(begin, end);
- auto result = find_escape_result<char>{end, nullptr, 0};
- for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
- [&](uint32_t cp, string_view sv) {
- if (needs_escape(cp)) {
- result = {sv.begin(), sv.end(), cp};
- return false;
- }
- return true;
- });
- return result;
-}
-
-#define FMT_STRING_IMPL(s, base, explicit) \
- [] { \
- /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
- /* Use a macro-like name to avoid shadowing warnings. */ \
- struct FMT_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 {
- Char v_array[1] = {v};
- *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_array, v_array + 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 format_specs<Char>& specs)
- : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
- if (specs.align == align::numeric) {
- auto width = to_unsigned(specs.width);
- if (width > size) {
- padding = width - size;
- size = width;
- }
- } else if (specs.precision > num_digits) {
- size = (prefix >> 24) + to_unsigned(specs.precision);
- padding = to_unsigned(specs.precision - num_digits);
- }
- }
-};
-
-// Writes an integer in the format
-// <left-padding><prefix><numeric-padding><digits><right-padding>
-// where <digits> are written by write_digits(it).
-// prefix contains chars in three lower bytes and the size in the fourth byte.
-template <typename OutputIt, typename Char, typename W>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
- unsigned prefix,
- 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) {
- auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
- if (prefix != 0) {
- for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
- *it++ = static_cast<Char>(p & 0xff);
- }
- return base_iterator(out, write_digits(it));
- }
- auto data = write_int_data<Char>(num_digits, prefix, specs);
- return write_padded<align::right>(
- out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
- for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
- *it++ = static_cast<Char>(p & 0xff);
- it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
- return write_digits(it);
- });
-}
-
-template <typename Char> class digit_grouping {
- private:
- std::string grouping_;
- std::basic_string<Char> thousands_sep_;
-
- struct next_state {
- std::string::const_iterator group;
- int pos;
- };
- auto initial_state() const -> next_state { return {grouping_.begin(), 0}; }
-
- // Returns the next digit group separator position.
- auto next(next_state& state) const -> int {
- 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++;
- return state.pos;
- }
-
- public:
- explicit digit_grouping(locale_ref loc, bool localized = true) {
- if (!localized) return;
- auto sep = thousands_sep<Char>(loc);
- grouping_ = sep.grouping;
- if (sep.thousands_sep) thousands_sep_.assign(1, sep.thousands_sep);
- }
- digit_grouping(std::string grouping, std::basic_string<Char> sep)
- : grouping_(std::move(grouping)), thousands_sep_(std::move(sep)) {}
-
- auto has_separator() const -> bool { return !thousands_sep_.empty(); }
-
- auto count_separators(int num_digits) const -> int {
- int count = 0;
- auto state = initial_state();
- while (num_digits > next(state)) ++count;
- return count;
- }
-
- // Applies grouping to digits and write the output to out.
- template <typename Out, typename C>
- auto apply(Out out, basic_string_view<C> digits) const -> Out {
- auto num_digits = static_cast<int>(digits.size());
- auto separators = basic_memory_buffer<int>();
- separators.push_back(0);
- auto state = initial_state();
- while (int i = next(state)) {
- if (i >= num_digits) break;
- separators.push_back(i);
- }
- for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
- i < num_digits; ++i) {
- if (num_digits - i == separators[sep_index]) {
- out =
- copy_str<Char>(thousands_sep_.data(),
- thousands_sep_.data() + thousands_sep_.size(), out);
- --sep_index;
- }
- *out++ = static_cast<Char>(digits[to_unsigned(i)]);
- }
- return out;
- }
-};
-
-FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
- prefix |= prefix != 0 ? value << 8 : value;
- prefix += (1u + (value > 0xff ? 1 : 0)) << 24;
-}
-
-// Writes a decimal integer with digit grouping.
-template <typename OutputIt, typename UInt, typename Char>
-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 = 0;
- auto buffer = memory_buffer();
- switch (specs.type) {
- case presentation_type::none:
- case presentation_type::dec: {
- num_digits = count_digits(value);
- format_decimal<char>(appender(buffer), value, num_digits);
- break;
- }
- case presentation_type::hex_lower:
- case presentation_type::hex_upper: {
- bool upper = specs.type == presentation_type::hex_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
- num_digits = count_digits<4>(value);
- format_uint<4, char>(appender(buffer), value, num_digits, upper);
- break;
- }
- case presentation_type::bin_lower:
- case presentation_type::bin_upper: {
- bool upper = specs.type == presentation_type::bin_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
- num_digits = count_digits<1>(value);
- format_uint<1, char>(appender(buffer), value, num_digits);
- break;
- }
- case presentation_type::oct: {
- num_digits = count_digits<3>(value);
- // Octal prefix '0' is counted as a digit, so only add it if precision
- // is not greater than the number of digits.
- if (specs.alt && specs.precision <= num_digits && value != 0)
- prefix_append(prefix, '0');
- format_uint<3, char>(appender(buffer), value, num_digits);
- break;
- }
- case presentation_type::chr:
- return write_char(out, static_cast<Char>(value), specs);
- default:
- throw_format_error("invalid format specifier");
- }
-
- unsigned size = (prefix != 0 ? prefix >> 24 : 0) + to_unsigned(num_digits) +
- to_unsigned(grouping.count_separators(num_digits));
- return write_padded<align::right>(
- out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
- for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
- *it++ = static_cast<Char>(p & 0xff);
- return grouping.apply(it, string_view(buffer.data(), buffer.size()));
- });
-}
-
-// 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;
-}
-
-template <typename UInt> struct write_int_arg {
- UInt abs_value;
- unsigned prefix;
-};
-
-template <typename T>
-FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
- -> write_int_arg<uint32_or_64_or_128_t<T>> {
- auto prefix = 0u;
- auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
- if (is_negative(value)) {
- prefix = 0x01000000 | '-';
- abs_value = 0 - abs_value;
- } else {
- constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
- 0x1000000u | ' '};
- prefix = prefixes[sign];
- }
- return {abs_value, prefix};
-}
-
-template <typename Char = char> struct loc_writer {
- buffer_appender<Char> out;
- const format_specs<Char>& specs;
- std::basic_string<Char> sep;
- std::string grouping;
- std::basic_string<Char> decimal_point;
-
- template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
- auto operator()(T value) -> bool {
- auto arg = make_write_int_arg(value, specs.sign);
- write_int(out, static_cast<uint64_or_128_t<T>>(arg.abs_value), arg.prefix,
- specs, digit_grouping<Char>(grouping, sep));
- return true;
- }
-
- template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
- auto operator()(T) -> bool {
- return false;
- }
-};
-
-template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
- const 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: {
- auto num_digits = count_digits(abs_value);
- return write_int(
- out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
- return format_decimal<Char>(it, abs_value, num_digits).end;
- });
- }
- case presentation_type::hex_lower:
- case presentation_type::hex_upper: {
- bool upper = specs.type == presentation_type::hex_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
- int num_digits = count_digits<4>(abs_value);
- return write_int(
- out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
- return format_uint<4, Char>(it, abs_value, num_digits, upper);
- });
- }
- case presentation_type::bin_lower:
- case presentation_type::bin_upper: {
- bool upper = specs.type == presentation_type::bin_upper;
- if (specs.alt)
- prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
- int num_digits = count_digits<1>(abs_value);
- return write_int(out, num_digits, prefix, specs,
- [=](reserve_iterator<OutputIt> it) {
- return format_uint<1, Char>(it, abs_value, num_digits);
- });
- }
- case presentation_type::oct: {
- int num_digits = count_digits<3>(abs_value);
- // Octal prefix '0' is counted as a digit, so only add it if precision
- // is not greater than the number of digits.
- if (specs.alt && specs.precision <= num_digits && abs_value != 0)
- prefix_append(prefix, '0');
- return write_int(out, num_digits, prefix, specs,
- [=](reserve_iterator<OutputIt> it) {
- return format_uint<3, Char>(it, abs_value, num_digits);
- });
- }
- case presentation_type::chr:
- return write_char(out, static_cast<Char>(abs_value), specs);
- default:
- 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 format_specs<Char>& specs,
- locale_ref loc) -> OutputIt {
- return write_int(out, arg, specs, loc);
-}
-template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(is_integral<T>::value &&
- !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 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);
-}
-// An inlined version of write used in format string compilation.
-template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(is_integral<T>::value &&
- !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 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 auto count() const -> size_t { return count_; }
-
- FMT_CONSTEXPR auto operator++() -> counting_iterator& {
- ++count_;
- return *this;
- }
- FMT_CONSTEXPR auto operator++(int) -> counting_iterator {
- auto it = *this;
- ++*this;
- return it;
- }
-
- FMT_CONSTEXPR friend auto operator+(counting_iterator it, difference_type n)
- -> counting_iterator {
- it.count_ += static_cast<size_t>(n);
- return it;
- }
-
- FMT_CONSTEXPR auto operator*() const -> value_type { return {}; }
-};
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
- 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));
- 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 format_specs<Char>& specs, locale_ref)
- -> OutputIt {
- return write(out, s, specs);
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
- const format_specs<Char>& specs, locale_ref)
- -> OutputIt {
- if (specs.type == presentation_type::pointer)
- return write_ptr<Char>(out, bit_cast<uintptr_t>(s), &specs);
- if (!s) throw_format_error("string pointer is null");
- return write(out, basic_string_view<Char>(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 Char>
-FMT_CONSTEXPR auto parse_float_type_spec(const format_specs<Char>& specs)
- -> 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:
- throw_format_error("invalid format specifier");
- break;
- }
- return result;
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan,
- format_specs<Char> specs,
- const float_specs& fspecs) -> OutputIt {
- auto str =
- 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);
- // Replace '0'-padding with space for non-finite values.
- const bool is_zero_fill =
- specs.fill.size() == 1 && *specs.fill.data() == static_cast<Char>('0');
- if (is_zero_fill) specs.fill[0] = static_cast<Char>(' ');
- return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
- if (sign) *it++ = detail::sign<Char>(sign);
- return copy_str<Char>(str, str + str_size, it);
- });
-}
-
-// A decimal floating-point number significand * pow(10, exp).
-struct big_decimal_fp {
- const char* significand;
- int significand_size;
- int exponent;
-};
-
-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>& f) -> int {
- return count_digits(f.significand);
-}
-
-template <typename Char, typename OutputIt>
-constexpr auto write_significand(OutputIt out, const char* significand,
- int significand_size) -> OutputIt {
- return copy_str<Char>(significand, significand + significand_size, out);
-}
-template <typename Char, typename OutputIt, typename UInt>
-inline auto write_significand(OutputIt out, UInt significand,
- int significand_size) -> OutputIt {
- return format_decimal<Char>(out, significand, significand_size).end;
-}
-template <typename Char, typename OutputIt, typename T, typename Grouping>
-FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
- int significand_size, int exponent,
- const Grouping& grouping) -> OutputIt {
- if (!grouping.has_separator()) {
- out = write_significand<Char>(out, significand, significand_size);
- return detail::fill_n(out, exponent, static_cast<Char>('0'));
- }
- auto buffer = memory_buffer();
- write_significand<char>(appender(buffer), significand, significand_size);
- detail::fill_n(appender(buffer), exponent, '0');
- return grouping.apply(out, string_view(buffer.data(), buffer.size()));
-}
-
-template <typename Char, typename UInt,
- FMT_ENABLE_IF(std::is_integral<UInt>::value)>
-inline auto write_significand(Char* out, UInt significand, int significand_size,
- int integral_size, Char decimal_point) -> Char* {
- if (!decimal_point)
- return format_decimal(out, significand, significand_size).end;
- out += significand_size + 1;
- Char* end = out;
- int floating_size = significand_size - integral_size;
- for (int i = floating_size / 2; i > 0; --i) {
- out -= 2;
- copy2(out, digits2(static_cast<std::size_t>(significand % 100)));
- significand /= 100;
- }
- if (floating_size % 2 != 0) {
- *--out = static_cast<Char>('0' + significand % 10);
- significand /= 10;
- }
- *--out = decimal_point;
- format_decimal(out - integral_size, significand, integral_size);
- return end;
-}
-
-template <typename OutputIt, typename UInt, typename Char,
- FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
-inline auto write_significand(OutputIt out, UInt significand,
- int significand_size, int integral_size,
- Char decimal_point) -> OutputIt {
- // Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
- Char buffer[digits10<UInt>() + 2];
- auto end = write_significand(buffer, significand, significand_size,
- integral_size, decimal_point);
- return detail::copy_str_noinline<Char>(buffer, end, out);
-}
-
-template <typename OutputIt, typename Char>
-FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand,
- int significand_size, int integral_size,
- Char decimal_point) -> OutputIt {
- out = detail::copy_str_noinline<Char>(significand,
- significand + integral_size, out);
- if (!decimal_point) return out;
- *out++ = decimal_point;
- return detail::copy_str_noinline<Char>(significand + integral_size,
- significand + significand_size, out);
-}
-
-template <typename OutputIt, typename Char, typename T, typename Grouping>
-FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
- int significand_size, int integral_size,
- Char decimal_point,
- const Grouping& grouping) -> OutputIt {
- if (!grouping.has_separator()) {
- return write_significand(out, significand, significand_size, integral_size,
- decimal_point);
- }
- auto buffer = basic_memory_buffer<Char>();
- write_significand(buffer_appender<Char>(buffer), significand,
- significand_size, integral_size, decimal_point);
- grouping.apply(
- out, basic_string_view<Char>(buffer.data(), to_unsigned(integral_size)));
- return detail::copy_str_noinline<Char>(buffer.data() + integral_size,
- buffer.end(), out);
-}
-
-template <typename OutputIt, typename DecimalFP, typename Char,
- typename Grouping = digit_grouping<Char>>
-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 = 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 = 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;
- // Use the fixed notation if the exponent is in [exp_lower, exp_upper),
- // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
- const int exp_lower = -4, exp_upper = 16;
- return output_exp < exp_lower ||
- output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
- };
- if (use_exp_format()) {
- int num_zeros = 0;
- if (fspecs.showpoint) {
- num_zeros = fspecs.precision - significand_size;
- if (num_zeros < 0) num_zeros = 0;
- size += to_unsigned(num_zeros);
- } else if (significand_size == 1) {
- decimal_point = Char();
- }
- auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
- int exp_digits = 2;
- if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
-
- size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
- char exp_char = fspecs.upper ? 'E' : 'e';
- auto write = [=](iterator it) {
- if (sign) *it++ = detail::sign<Char>(sign);
- // Insert a decimal point after the first digit and add an exponent.
- it = write_significand(it, significand, significand_size, 1,
- decimal_point);
- if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero);
- *it++ = static_cast<Char>(exp_char);
- return write_exponent<Char>(output_exp, it);
- };
- return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
- : base_iterator(out, write(reserve(out, size)));
- }
-
- int exp = f.exponent + significand_size;
- if (f.exponent >= 0) {
- // 1234e5 -> 123400000[.0+]
- size += to_unsigned(f.exponent);
- int num_zeros = fspecs.precision - exp;
- abort_fuzzing_if(num_zeros > 5000);
- if (fspecs.showpoint) {
- ++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(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,
- f.exponent, grouping);
- if (!fspecs.showpoint) return it;
- *it++ = decimal_point;
- return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
- });
- } else if (exp > 0) {
- // 1234e-2 -> 12.34[0+]
- int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
- size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
- auto grouping = Grouping(loc, fspecs.locale);
- 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,
- decimal_point, grouping);
- return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
- });
- }
- // 1234e-6 -> 0.001234
- int num_zeros = -exp;
- if (significand_size == 0 && fspecs.precision >= 0 &&
- fspecs.precision < num_zeros) {
- num_zeros = fspecs.precision;
- }
- bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
- size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
- return write_padded<align::right>(out, specs, size, [&](iterator it) {
- if (sign) *it++ = detail::sign<Char>(sign);
- *it++ = zero;
- if (!pointy) return it;
- *it++ = decimal_point;
- it = detail::fill_n(it, num_zeros, zero);
- return write_significand<Char>(it, significand, significand_size);
- });
-}
-
-template <typename Char> class fallback_digit_grouping {
- public:
- constexpr fallback_digit_grouping(locale_ref, bool) {}
-
- constexpr auto has_separator() const -> bool { return false; }
-
- constexpr auto count_separators(int) const -> int { return 0; }
-
- template <typename Out, typename C>
- constexpr auto apply(Out out, basic_string_view<C>) const -> Out {
- return out;
- }
-};
-
-template <typename OutputIt, typename DecimalFP, typename Char>
-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, f, specs, fspecs,
- loc);
- } else {
- return do_write_float(out, f, specs, fspecs, loc);
- }
-}
-
-template <typename T> constexpr auto isnan(T value) -> bool {
- return !(value >= value); // std::isnan doesn't support __float128.
-}
-
-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 auto isfinite(T value) -> bool {
- 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 auto isfinite(T value) -> bool {
- 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(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 >> (num_bits<uint64_t>() - 1)) != 0;
- }
-#endif
- }
- return std::signbit(static_cast<double>(value));
-}
-
-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 auto operator[](int index) const -> bigit {
- return bigits_[to_unsigned(index)];
- }
- FMT_CONSTEXPR20 auto operator[](int index) -> bigit& {
- 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 auto num_bigits() const -> int {
- return static_cast<int>(bigits_.size()) + exp_;
- }
-
- FMT_NOINLINE FMT_CONSTEXPR20 auto operator<<=(int shift) -> bigint& {
- 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 auto operator*=(Int value) -> bigint& {
- FMT_ASSERT(value > 0, "");
- multiply(uint32_or_64_or_128_t<Int>(value));
- return *this;
- }
-
- friend FMT_CONSTEXPR20 auto compare(const bigint& lhs, const bigint& rhs)
- -> int {
- 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 auto add_compare(const bigint& lhs1,
- const bigint& lhs2, const bigint& rhs)
- -> int {
- 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, 0u);
- exp_ -= exp_difference;
- }
-
- // Divides this bignum by divisor, assigning the remainder to this and
- // returning the quotient.
- FMT_CONSTEXPR20 auto divmod_assign(const bigint& divisor) -> int {
- 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';
- if ((flags & dragon::fixed) != 0)
- buf.push_back('0');
- else
- ++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);
-}
-
-constexpr auto fractional_part_rounding_thresholds(int index) -> uint32_t {
- // 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.
- // It is equal to ceil(2^31 + 2^32/10^(k + 1)).
- // These are stored in a string literal because we cannot have static arrays
- // in constexpr functions and non-static ones are poorly optimized.
- return U"\x9999999a\x828f5c29\x80418938\x80068db9\x8000a7c6\x800010c7"
- U"\x800001ae\x8000002b"[index];
-}
-
-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 >= 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 >= 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 {
- 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.
- fspecs.sign = sign::minus;
- value = -value;
- } else if (fspecs.sign == sign::minus) {
- fspecs.sign = sign::none;
- }
-
- if (!detail::isfinite(value))
- return write_nonfinite(out, detail::isnan(value), specs, fspecs);
-
- if (specs.align == align::numeric && fspecs.sign) {
- auto it = reserve(out, 1);
- *it++ = detail::sign<Char>(fspecs.sign);
- out = base_iterator(out, it);
- fspecs.sign = sign::none;
- if (specs.width != 0) --specs.width;
- }
-
- memory_buffer buffer;
- if (fspecs.format == float_format::hex) {
- if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
- format_hexfloat(convert_float(value), specs.precision, fspecs, buffer);
- return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
- specs);
- }
- int precision = specs.precision >= 0 || specs.type == presentation_type::none
- ? specs.precision
- : 6;
- if (fspecs.format == float_format::exp) {
- if (precision == max_value<int>())
- 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;
- int exp = format_float(convert_float(value), precision, fspecs, buffer);
- fspecs.precision = precision;
- 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, format_specs<Char>());
- if (const_check(!is_supported_floating_point(value))) return out;
-
- auto fspecs = float_specs();
- if (detail::signbit(value)) {
- fspecs.sign = sign::minus;
- value = -value;
- }
-
- 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(is_floating_point<T>::value &&
- !is_fast_float<T>::value)>
-inline auto write(OutputIt out, T value) -> OutputIt {
- return write(out, value, format_specs<Char>());
-}
-
-template <typename Char, typename OutputIt>
-auto write(OutputIt out, monostate, format_specs<Char> = {}, locale_ref = {})
- -> OutputIt {
- FMT_ASSERT(false, "");
- return out;
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> value)
- -> OutputIt {
- auto it = reserve(out, value.size());
- it = copy_str_noinline<Char>(value.begin(), value.end(), it);
- return base_iterator(out, it);
-}
-
-template <typename Char, typename OutputIt, typename T,
- FMT_ENABLE_IF(is_string<T>::value)>
-constexpr auto write(OutputIt out, const T& value) -> OutputIt {
- return write<Char>(out, to_string_view(value));
-}
-
-// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
-template <
- typename Char, typename OutputIt, typename T,
- bool check =
- std::is_enum<T>::value && !std::is_same<T, Char>::value &&
- mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
- type::custom_type,
- FMT_ENABLE_IF(check)>
-FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
- 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 format_specs<Char>& specs = {}, locale_ref = {})
- -> OutputIt {
- return specs.type != presentation_type::none &&
- specs.type != presentation_type::string
- ? write(out, value ? 1 : 0, specs, {})
- : write_bytes(out, value ? "true" : "false", specs);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt {
- auto it = reserve(out, 1);
- *it++ = value;
- return base_iterator(out, it);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
- -> OutputIt {
- 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 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.
-template <typename Char, typename OutputIt, typename T,
- typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
- std::is_class<T>::value && !is_string<T>::value &&
- !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));
-}
-
-template <typename Char, typename OutputIt, typename T,
- typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value)
- -> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
- OutputIt> {
- auto formatter = typename Context::template formatter_type<T>();
- auto parse_ctx = typename Context::parse_context_type({});
- formatter.parse(parse_ctx);
- auto ctx = Context(out, {}, {});
- return formatter.format(value, ctx);
-}
-
-// An argument visitor that formats the argument and writes it via the output
-// iterator. It's a class and not a generic lambda for compatibility with C++11.
-template <typename Char> struct default_arg_formatter {
- using iterator = buffer_appender<Char>;
- using context = buffer_context<Char>;
-
- iterator out;
- basic_format_args<context> args;
- locale_ref loc;
-
- template <typename T> auto operator()(T value) -> iterator {
- return write<Char>(out, value);
- }
- auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
- basic_format_parse_context<Char> parse_ctx({});
- context format_ctx(out, args, loc);
- h.format(parse_ctx, format_ctx);
- return format_ctx.out();
- }
-};
-
-template <typename Char> struct arg_formatter {
- using iterator = buffer_appender<Char>;
- using context = buffer_context<Char>;
-
- iterator out;
- const format_specs<Char>& specs;
- locale_ref locale;
-
- template <typename T>
- FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator {
- return detail::write(out, value, specs, locale);
- }
- auto operator()(typename basic_format_arg<context>::handle) -> iterator {
- // User-defined types are handled separately because they require access
- // to the parse context.
- return out;
- }
-};
-
-struct width_checker {
- template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
- FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
- if (is_negative(value)) throw_format_error("negative width");
- return static_cast<unsigned long long>(value);
- }
-
- template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
- FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
- throw_format_error("width is not integer");
- return 0;
- }
-};
-
-struct precision_checker {
- template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
- FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
- if (is_negative(value)) throw_format_error("negative precision");
- return static_cast<unsigned long long>(value);
- }
-
- template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
- FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
- throw_format_error("precision is not integer");
- return 0;
- }
-};
-
-template <typename Handler, typename FormatArg>
-FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg) -> int {
- unsigned long long value = visit_format_arg(Handler(), arg);
- if (value > to_unsigned(max_value<int>()))
- throw_format_error("number is too big");
- return static_cast<int>(value);
-}
-
-template <typename Context, typename ID>
-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;
-}
-
-template <typename Handler, typename Context>
-FMT_CONSTEXPR void handle_dynamic_spec(int& value,
- arg_ref<typename Context::char_type> ref,
- Context& ctx) {
- switch (ref.kind) {
- case arg_id_kind::none:
- break;
- case arg_id_kind::index:
- value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.index));
- break;
- case arg_id_kind::name:
- value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.name));
- break;
- }
-}
-
-#if FMT_USE_USER_DEFINED_LITERALS
-# 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 {
- static constexpr auto name = Str.data;
-
- const T& value;
- statically_named_arg(const T& v) : value(v) {}
-};
-
-template <typename T, typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_named_arg<statically_named_arg<T, Char, N, Str>> : std::true_type {};
-
-template <typename T, typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_statically_named_arg<statically_named_arg<T, Char, N, Str>>
- : std::true_type {};
-
-template <typename Char, size_t N,
- fmt::detail_exported::fixed_string<Char, N> Str>
-struct udl_arg {
- template <typename T> auto operator=(T&& value) const {
- return statically_named_arg<T, Char, N, Str>(std::forward<T>(value));
- }
-};
-# else
-template <typename Char> struct udl_arg {
- const Char* str;
-
- template <typename T> auto operator=(T&& value) const -> named_arg<Char, T> {
- return {str, std::forward<T>(value)};
- }
-};
-# endif
-#endif // FMT_USE_USER_DEFINED_LITERALS
-
-template <typename Locale, typename Char>
-auto vformat(const Locale& loc, basic_string_view<Char> fmt,
- basic_format_args<buffer_context<type_identity_t<Char>>> args)
- -> std::basic_string<Char> {
- 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) noexcept;
-
-FMT_API void report_error(format_func func, int error_code,
- 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...)``.
- *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
- */
-template <typename... T>
-auto system_error(int error_code, format_string<T...> fmt, T&&... args)
- -> std::system_error {
- return vsystem_error(error_code, fmt, fmt::make_format_args(args...));
-}
-
-/**
- \rst
- Formats an error message for an error returned by an operating system or a
- language runtime, for example a file opening error, and writes it to *out*.
- The format is the same as the one used by ``std::system_error(ec, message)``
- where ``ec`` is ``std::error_code(error_code, std::generic_category()})``.
- It is implementation-defined but normally looks like:
-
- .. parsed-literal::
- *<message>*: *<system-message>*
-
- where *<message>* is the passed message and *<system-message>* is the system
- message corresponding to the error code.
- *error_code* is a system error code as given by ``errno``.
- \endrst
- */
-FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
- 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) noexcept;
-
-/** Fast integer formatter. */
-class format_int {
- private:
- // Buffer should be large enough to hold all digits (digits10 + 1),
- // a sign and a null character.
- enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
- mutable char buffer_[buffer_size];
- char* str_;
-
- template <typename UInt> auto format_unsigned(UInt value) -> char* {
- auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
- return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
- }
-
- template <typename Int> auto format_signed(Int value) -> char* {
- auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
- bool negative = value < 0;
- if (negative) abs_value = 0 - abs_value;
- auto begin = format_unsigned(abs_value);
- if (negative) *--begin = '-';
- return begin;
- }
-
- public:
- explicit format_int(int value) : str_(format_signed(value)) {}
- explicit format_int(long value) : str_(format_signed(value)) {}
- explicit format_int(long long value) : str_(format_signed(value)) {}
- explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
- explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
- explicit format_int(unsigned long long value)
- : str_(format_unsigned(value)) {}
-
- /** Returns the number of characters written to the output buffer. */
- auto size() const -> size_t {
- return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
- }
-
- /**
- Returns a pointer to the output buffer content. No terminating null
- character is appended.
- */
- auto data() const -> const char* { return str_; }
-
- /**
- Returns a pointer to the output buffer content with terminating null
- character appended.
- */
- auto c_str() const -> const char* {
- buffer_[buffer_size - 1] = '\0';
- return str_;
- }
-
- /**
- \rst
- Returns the content of the output buffer as an ``std::string``.
- \endrst
- */
- auto str() const -> std::string { return std::string(str_, size()); }
-};
-
-template <typename T, typename Char>
-struct formatter<T, Char, enable_if_t<detail::has_format_as<T>::value>>
- : formatter<detail::format_as_t<T>, Char> {
- template <typename FormatContext>
- auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) {
- using base = formatter<detail::format_as_t<T>, Char>;
- 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, 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::std_string_view<Char>, basic_string_view<Char>);
-FMT_FORMAT_AS(void*, const void*);
-
-template <typename Char, size_t N>
-struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {};
-
-/**
- \rst
- Converts ``p`` to ``const void*`` for pointer formatting.
-
- **Example**::
-
- auto s = fmt::format("{}", fmt::ptr(p));
- \endrst
- */
-template <typename T> auto ptr(T p) -> const void* {
- static_assert(std::is_pointer<T>::value, "");
- return detail::bit_cast<const void*>(p);
-}
-template <typename T, 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_;
- friend struct formatter<bytes>;
-
- public:
- explicit bytes(string_view data) : data_(data) {}
-};
-
-template <> struct formatter<bytes> {
- private:
- detail::dynamic_format_specs<> specs_;
-
- public:
- template <typename ParseContext>
- 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>
- auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
- detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
- specs_.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
- return detail::write_bytes(ctx.out(), b.data_, specs_);
- }
-};
-
-// group_digits_view is not derived from view because it copies the argument.
-template <typename T> struct group_digits_view {
- T value;
-};
-
-/**
- \rst
- Returns a view that formats an integer value using ',' as a locale-independent
- thousands separator.
-
- **Example**::
-
- fmt::print("{}", fmt::group_digits(12345));
- // Output: "12,345"
- \endrst
- */
-template <typename T> auto group_digits(T value) -> group_digits_view<T> {
- return {value};
-}
-
-template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
- private:
- detail::dynamic_format_specs<> specs_;
-
- public:
- template <typename ParseContext>
- 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>
- auto format(group_digits_view<T> t, FormatContext& ctx)
- -> decltype(ctx.out()) {
- detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
- specs_.width_ref, ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(
- specs_.precision, specs_.precision_ref, ctx);
- return detail::write_int(
- ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
- detail::digit_grouping<char>("\3", ","));
- }
-};
-
-template <typename T> struct nested_view {
- const formatter<T>* fmt;
- const T* value;
-};
-
-template <typename T> struct formatter<nested_view<T>> {
- FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* {
- return ctx.begin();
- }
- auto format(nested_view<T> view, format_context& ctx) const
- -> decltype(ctx.out()) {
- return view.fmt->format(*view.value, ctx);
- }
-};
-
-template <typename T> struct nested_formatter {
- private:
- int width_;
- detail::fill_t<char> fill_;
- align_t align_ : 4;
- formatter<T> formatter_;
-
- public:
- constexpr nested_formatter() : width_(0), align_(align_t::none) {}
-
- FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* {
- auto specs = detail::dynamic_format_specs<char>();
- auto it = parse_format_specs(ctx.begin(), ctx.end(), specs, ctx,
- detail::type::none_type);
- width_ = specs.width;
- fill_ = specs.fill;
- align_ = specs.align;
- ctx.advance_to(it);
- return formatter_.parse(ctx);
- }
-
- template <typename F>
- auto write_padded(format_context& ctx, F write) const -> decltype(ctx.out()) {
- if (width_ == 0) return write(ctx.out());
- auto buf = memory_buffer();
- write(std::back_inserter(buf));
- auto specs = format_specs<>();
- specs.width = width_;
- specs.fill = fill_;
- specs.align = align_;
- return detail::write(ctx.out(), string_view(buf.data(), buf.size()), specs);
- }
-
- auto nested(const T& value) const -> nested_view<T> {
- return nested_view<T>{&formatter_, &value};
- }
-};
-
-// DEPRECATED! join_view will be moved to ranges.h.
-template <typename It, typename Sentinel, typename Char = char>
-struct join_view : detail::view {
- It begin;
- Sentinel end;
- basic_string_view<Char> sep;
-
- join_view(It b, Sentinel e, basic_string_view<Char> s)
- : begin(b), end(e), sep(s) {}
-};
-
-template <typename It, typename Sentinel, typename Char>
-struct formatter<join_view<It, Sentinel, Char>, Char> {
- private:
- using value_type =
-#ifdef __cpp_lib_ranges
- std::iter_value_t<It>;
-#else
- typename std::iterator_traits<It>::value_type;
-#endif
- formatter<remove_cvref_t<value_type>, Char> value_formatter_;
-
- public:
- template <typename ParseContext>
- 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) const -> decltype(ctx.out()) {
- auto it = value.begin;
- auto out = ctx.out();
- if (it != value.end) {
- 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(*it, ctx);
- ++it;
- }
- }
- return out;
- }
-};
-
-/**
- Returns a view that formats the iterator range `[begin, end)` with elements
- separated by `sep`.
- */
-template <typename It, typename Sentinel>
-auto join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> {
- return {begin, end, sep};
-}
-
-/**
- \rst
- Returns a view that formats `range` with elements separated by `sep`.
-
- **Example**::
-
- std::vector<int> v = {1, 2, 3};
- fmt::print("{}", fmt::join(v, ", "));
- // Output: "1, 2, 3"
-
- ``fmt::join`` applies passed format specifiers to the range elements::
-
- fmt::print("{:02}", fmt::join(v, ", "));
- // Output: "01, 02, 03"
- \endrst
- */
-template <typename Range>
-auto join(Range&& range, string_view sep)
- -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>> {
- return join(std::begin(range), std::end(range), sep);
-}
-
-/**
- \rst
- Converts *value* to ``std::string`` using the default format for type *T*.
-
- **Example**::
-
- #include <fmt/format.h>
-
- std::string answer = fmt::to_string(42);
- \endrst
- */
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
- !detail::has_format_as<T>::value)>
-inline auto to_string(const T& value) -> std::string {
- 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)>
-FMT_NODISCARD inline auto to_string(T value) -> std::string {
- // The buffer should be large enough to store the number including the sign
- // or "false" for bool.
- constexpr int max_size = detail::digits10<T>() + 2;
- char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
- char* begin = buffer;
- return std::string(begin, detail::write<char>(begin, value));
-}
-
-template <typename Char, size_t SIZE>
-FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
- -> std::basic_string<Char> {
- auto size = buf.size();
- detail::assume(size < std::basic_string<Char>().max_size());
- return std::basic_string<Char>(buf.data(), size);
-}
-
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
- detail::has_format_as<T>::value)>
-inline auto to_string(const T& value) -> std::string {
- return to_string(format_as(value));
-}
-
-FMT_END_EXPORT
-
-namespace detail {
-
-template <typename Char>
-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);
- if (!arg) throw_format_error("argument not found");
- visit_format_arg(default_arg_formatter<Char>{out, args, loc}, arg);
- return;
- }
-
- struct format_handler : error_handler {
- basic_format_parse_context<Char> parse_context;
- buffer_context<Char> context;
-
- 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));
- context.advance_to(write<Char>(context.out(), text));
- }
-
- FMT_CONSTEXPR auto on_arg_id() -> int {
- return parse_context.next_arg_id();
- }
- FMT_CONSTEXPR auto on_arg_id(int id) -> int {
- return parse_context.check_arg_id(id), id;
- }
- FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
- int arg_id = context.arg_id(id);
- if (arg_id < 0) throw_format_error("argument not found");
- return arg_id;
- }
-
- FMT_INLINE void on_replacement_field(int id, const Char*) {
- auto arg = get_arg(context, id);
- context.advance_to(visit_format_arg(
- default_arg_formatter<Char>{context.out(), context.args(),
- context.locale()},
- arg));
- }
-
- auto on_format_specs(int id, const Char* begin, const Char* end)
- -> const Char* {
- auto arg = get_arg(context, id);
- // Not using a visitor for custom types gives better codegen.
- if (arg.format_custom(begin, parse_context, context))
- return parse_context.begin();
- 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 != '}')
- throw_format_error("missing '}' in format string");
- auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
- context.advance_to(visit_format_arg(f, arg));
- return begin;
- }
- };
- detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
-}
-
-FMT_BEGIN_EXPORT
-
-#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;
-#endif // FMT_HEADER_ONLY
-
-} // namespace detail
-
-#if FMT_USE_USER_DEFINED_LITERALS
-inline namespace literals {
-/**
- \rst
- User-defined literal equivalent of :func:`fmt::arg`.
-
- **Example**::
-
- using namespace fmt::literals;
- fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
- \endrst
- */
-# 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
-} // namespace literals
-#endif // FMT_USE_USER_DEFINED_LITERALS
-
-template <typename Locale, FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto vformat(const Locale& loc, string_view fmt, format_args args)
- -> std::string {
- return detail::vformat(loc, fmt, args);
-}
-
-template <typename Locale, typename... T,
- FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
- -> std::string {
- return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...));
-}
-
-template <typename OutputIt, typename Locale,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
- detail::is_locale<Locale>::value)>
-auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
- format_args args) -> OutputIt {
- 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, out);
-}
-
-template <typename OutputIt, typename Locale, typename... T,
- FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
- detail::is_locale<Locale>::value)>
-FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
- format_string<T...> fmt, T&&... args) -> OutputIt {
- return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
-}
-
-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();
-}
-
-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) {
- return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
- }
- 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());
-}
-
-FMT_END_NAMESPACE
-
-#ifdef FMT_HEADER_ONLY
-# define FMT_FUNC inline
-# include "format-inl.h"
-#else
-# define FMT_FUNC
-#endif
-
-#endif // FMT_FORMAT_H_
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