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// Primitive numeric conversions (to_chars and from_chars) -*- C++ -*- |
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|
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// Copyright (C) 2017-2021 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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|
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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|
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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|
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// <http://www.gnu.org/licenses/>. |
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|
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/** @file include/charconv |
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* This is a Standard C++ Library header. |
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*/ |
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|
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#ifndef _GLIBCXX_CHARCONV |
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#define _GLIBCXX_CHARCONV 1 |
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|
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#pragma GCC system_header |
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|
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// As an extension we support <charconv> in C++14, but this header should not |
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// be included by any other library headers in C++14 mode. This ensures that |
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// the names defined in this header are not added to namespace std unless a |
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// user explicitly includes <charconv> in C++14 code. |
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#if __cplusplus >= 201402L |
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|
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#include <type_traits> |
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#include <bit> // for __bit_width |
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#include <cctype> // for isdigit |
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#include <bits/charconv.h> // for __to_chars_len, __to_chars_10_impl |
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#include <bits/error_constants.h> // for std::errc |
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#include <ext/numeric_traits.h> |
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|
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#if _GLIBCXX_HAVE_USELOCALE |
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# define __cpp_lib_to_chars 201611L |
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#endif |
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|
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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|
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/// Result type of std::to_chars |
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struct to_chars_result |
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{ |
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char* ptr; |
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errc ec; |
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|
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#if __cplusplus > 201703L && __cpp_impl_three_way_comparison >= 201907L |
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friend bool |
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operator==(const to_chars_result&, const to_chars_result&) = default; |
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#endif |
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}; |
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|
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/// Result type of std::from_chars |
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struct from_chars_result |
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{ |
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const char* ptr; |
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errc ec; |
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|
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#if __cplusplus > 201703L && __cpp_impl_three_way_comparison >= 201907L |
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friend bool |
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operator==(const from_chars_result&, const from_chars_result&) = default; |
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#endif |
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}; |
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|
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namespace __detail |
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{ |
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template<typename _Tp> |
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using __integer_to_chars_result_type |
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= enable_if_t<__or_<__is_signed_integer<_Tp>, |
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__is_unsigned_integer<_Tp>, |
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is_same<char, remove_cv_t<_Tp>>>::value, |
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to_chars_result>; |
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|
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// Pick an unsigned type of suitable size. This is used to reduce the |
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// number of specializations of __to_chars_len, __to_chars etc. that |
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// get instantiated. For example, to_chars<char> and to_chars<short> |
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// and to_chars<unsigned> will all use the same code, and so will |
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// to_chars<long> when sizeof(int) == sizeof(long). |
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template<typename _Tp> |
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struct __to_chars_unsigned_type : __make_unsigned_selector_base |
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{ |
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using _UInts = _List<unsigned int, unsigned long, unsigned long long |
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#if _GLIBCXX_USE_INT128 |
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, unsigned __int128 |
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#endif |
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>; |
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using type = typename __select<sizeof(_Tp), _UInts>::__type; |
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}; |
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|
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template<typename _Tp> |
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using __unsigned_least_t = typename __to_chars_unsigned_type<_Tp>::type; |
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|
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// Generic implementation for arbitrary bases. |
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// Defined in <bits/charconv.h>. |
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template<typename _Tp> |
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constexpr unsigned |
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__to_chars_len(_Tp __value, int __base /* = 10 */) noexcept; |
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|
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template<typename _Tp> |
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constexpr unsigned |
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__to_chars_len_2(_Tp __value) noexcept |
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{ return std::__bit_width(__value); } |
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|
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// Generic implementation for arbitrary bases. |
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template<typename _Tp> |
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to_chars_result |
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__to_chars(char* __first, char* __last, _Tp __val, int __base) noexcept |
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{ |
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static_assert(is_integral<_Tp>::value, "implementation bug"); |
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static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
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|
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to_chars_result __res; |
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|
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const unsigned __len = __to_chars_len(__val, __base); |
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|
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if (__builtin_expect((__last - __first) < __len, 0)) |
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{ |
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__res.ptr = __last; |
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__res.ec = errc::value_too_large; |
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return __res; |
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} |
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|
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unsigned __pos = __len - 1; |
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|
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static constexpr char __digits[] = { |
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', |
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', |
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'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', |
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'u', 'v', 'w', 'x', 'y', 'z' |
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}; |
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|
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while (__val >= (unsigned)__base) |
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{ |
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auto const __quo = __val / __base; |
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auto const __rem = __val % __base; |
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__first[__pos--] = __digits[__rem]; |
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__val = __quo; |
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} |
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*__first = __digits[__val]; |
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|
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__res.ptr = __first + __len; |
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__res.ec = {}; |
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return __res; |
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} |
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|
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template<typename _Tp> |
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__integer_to_chars_result_type<_Tp> |
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__to_chars_16(char* __first, char* __last, _Tp __val) noexcept |
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{ |
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static_assert(is_integral<_Tp>::value, "implementation bug"); |
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static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
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|
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to_chars_result __res; |
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|
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const unsigned __len = (__to_chars_len_2(__val) + 3) / 4; |
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|
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if (__builtin_expect((__last - __first) < __len, 0)) |
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{ |
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__res.ptr = __last; |
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__res.ec = errc::value_too_large; |
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return __res; |
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} |
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|
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static constexpr char __digits[] = { |
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', |
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'a', 'b', 'c', 'd', 'e', 'f' |
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}; |
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unsigned __pos = __len - 1; |
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while (__val >= 0x100) |
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{ |
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auto __num = __val & 0xF; |
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__val >>= 4; |
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__first[__pos] = __digits[__num]; |
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__num = __val & 0xF; |
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__val >>= 4; |
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__first[__pos - 1] = __digits[__num]; |
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__pos -= 2; |
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} |
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if (__val >= 0x10) |
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{ |
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const auto __num = __val & 0xF; |
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__val >>= 4; |
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__first[1] = __digits[__num]; |
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__first[0] = __digits[__val]; |
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} |
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else |
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__first[0] = __digits[__val]; |
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__res.ptr = __first + __len; |
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__res.ec = {}; |
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return __res; |
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} |
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|
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template<typename _Tp> |
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inline __integer_to_chars_result_type<_Tp> |
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__to_chars_10(char* __first, char* __last, _Tp __val) noexcept |
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{ |
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static_assert(is_integral<_Tp>::value, "implementation bug"); |
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static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
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|
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to_chars_result __res; |
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|
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const unsigned __len = __to_chars_len(__val, 10); |
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|
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if (__builtin_expect((__last - __first) < __len, 0)) |
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{ |
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__res.ptr = __last; |
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__res.ec = errc::value_too_large; |
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return __res; |
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} |
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|
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__detail::__to_chars_10_impl(__first, __len, __val); |
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__res.ptr = __first + __len; |
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__res.ec = {}; |
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return __res; |
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} |
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|
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template<typename _Tp> |
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__integer_to_chars_result_type<_Tp> |
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__to_chars_8(char* __first, char* __last, _Tp __val) noexcept |
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{ |
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static_assert(is_integral<_Tp>::value, "implementation bug"); |
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static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
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|
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to_chars_result __res; |
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unsigned __len; |
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|
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if _GLIBCXX17_CONSTEXPR (__gnu_cxx::__int_traits<_Tp>::__digits <= 16) |
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{ |
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__len = __val > 077777u ? 6u |
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: __val > 07777u ? 5u |
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: __val > 0777u ? 4u |
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: __val > 077u ? 3u |
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: __val > 07u ? 2u |
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: 1u; |
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} |
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else |
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__len = (__to_chars_len_2(__val) + 2) / 3; |
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|
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if (__builtin_expect((__last - __first) < __len, 0)) |
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{ |
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__res.ptr = __last; |
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__res.ec = errc::value_too_large; |
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return __res; |
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} |
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|
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unsigned __pos = __len - 1; |
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while (__val >= 0100) |
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{ |
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auto __num = __val & 7; |
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__val >>= 3; |
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__first[__pos] = '0' + __num; |
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__num = __val & 7; |
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__val >>= 3; |
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__first[__pos - 1] = '0' + __num; |
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__pos -= 2; |
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} |
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if (__val >= 010) |
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{ |
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auto const __num = __val & 7; |
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__val >>= 3; |
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__first[1] = '0' + __num; |
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__first[0] = '0' + __val; |
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} |
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else |
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__first[0] = '0' + __val; |
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__res.ptr = __first + __len; |
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__res.ec = {}; |
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return __res; |
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} |
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|
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template<typename _Tp> |
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__integer_to_chars_result_type<_Tp> |
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__to_chars_2(char* __first, char* __last, _Tp __val) noexcept |
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{ |
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static_assert(is_integral<_Tp>::value, "implementation bug"); |
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static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
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|
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to_chars_result __res; |
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|
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const unsigned __len = __to_chars_len_2(__val); |
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|
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if (__builtin_expect((__last - __first) < __len, 0)) |
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{ |
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__res.ptr = __last; |
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__res.ec = errc::value_too_large; |
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return __res; |
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} |
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|
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unsigned __pos = __len - 1; |
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|
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while (__pos) |
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{ |
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__first[__pos--] = '0' + (__val & 1); |
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__val >>= 1; |
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} |
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// First digit is always '1' because __to_chars_len_2 skips |
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// leading zero bits and std::to_chars handles zero values |
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// directly. |
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__first[0] = '1'; |
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|
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__res.ptr = __first + __len; |
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__res.ec = {}; |
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return __res; |
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} |
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|
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} // namespace __detail |
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|
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template<typename _Tp> |
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__detail::__integer_to_chars_result_type<_Tp> |
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__to_chars_i(char* __first, char* __last, _Tp __value, int __base = 10) |
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{ |
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__glibcxx_assert(2 <= __base && __base <= 36); |
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|
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using _Up = __detail::__unsigned_least_t<_Tp>; |
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_Up __unsigned_val = __value; |
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|
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if (__first == __last) [[__unlikely__]] |
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return { __last, errc::value_too_large }; |
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|
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if (__value == 0) |
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{ |
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*__first = '0'; |
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return { __first + 1, errc{} }; |
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} |
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|
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if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value) |
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if (__value < 0) |
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{ |
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if (__builtin_expect(__first != __last, 1)) |
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*__first++ = '-'; |
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__unsigned_val = _Up(~__value) + _Up(1); |
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} |
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|
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switch (__base) |
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{ |
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case 16: |
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return __detail::__to_chars_16(__first, __last, __unsigned_val); |
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case 10: |
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return __detail::__to_chars_10(__first, __last, __unsigned_val); |
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case 8: |
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return __detail::__to_chars_8(__first, __last, __unsigned_val); |
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case 2: |
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return __detail::__to_chars_2(__first, __last, __unsigned_val); |
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default: |
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return __detail::__to_chars(__first, __last, __unsigned_val, __base); |
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} |
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} |
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|
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#define _GLIBCXX_TO_CHARS(T) \ |
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inline to_chars_result \ |
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to_chars(char* __first, char* __last, T __value, int __base = 10) \ |
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{ return std::__to_chars_i<T>(__first, __last, __value, __base); } |
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_GLIBCXX_TO_CHARS(char) |
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_GLIBCXX_TO_CHARS(signed char) |
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_GLIBCXX_TO_CHARS(unsigned char) |
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_GLIBCXX_TO_CHARS(signed short) |
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_GLIBCXX_TO_CHARS(unsigned short) |
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_GLIBCXX_TO_CHARS(signed int) |
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_GLIBCXX_TO_CHARS(unsigned int) |
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_GLIBCXX_TO_CHARS(signed long) |
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_GLIBCXX_TO_CHARS(unsigned long) |
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_GLIBCXX_TO_CHARS(signed long long) |
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_GLIBCXX_TO_CHARS(unsigned long long) |
| 378 |
#if defined(__GLIBCXX_TYPE_INT_N_0) |
| 379 |
_GLIBCXX_TO_CHARS(signed __GLIBCXX_TYPE_INT_N_0) |
| 380 |
_GLIBCXX_TO_CHARS(unsigned __GLIBCXX_TYPE_INT_N_0) |
| 381 |
#endif |
| 382 |
#if defined(__GLIBCXX_TYPE_INT_N_1) |
| 383 |
_GLIBCXX_TO_CHARS(signed __GLIBCXX_TYPE_INT_N_1) |
| 384 |
_GLIBCXX_TO_CHARS(unsigned __GLIBCXX_TYPE_INT_N_1) |
| 385 |
#endif |
| 386 |
#if defined(__GLIBCXX_TYPE_INT_N_2) |
| 387 |
_GLIBCXX_TO_CHARS(signed __GLIBCXX_TYPE_INT_N_2) |
| 388 |
_GLIBCXX_TO_CHARS(unsigned __GLIBCXX_TYPE_INT_N_2) |
| 389 |
#endif |
| 390 |
#if defined(__GLIBCXX_TYPE_INT_N_3) |
| 391 |
_GLIBCXX_TO_CHARS(signed __GLIBCXX_TYPE_INT_N_3) |
| 392 |
_GLIBCXX_TO_CHARS(unsigned __GLIBCXX_TYPE_INT_N_3) |
| 393 |
#endif |
| 394 |
#undef _GLIBCXX_TO_CHARS |
| 395 |
|
| 396 |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 397 |
// 3266. to_chars(bool) should be deleted |
| 398 |
to_chars_result to_chars(char*, char*, bool, int = 10) = delete; |
| 399 |
|
| 400 |
namespace __detail |
| 401 |
{ |
| 402 |
template<typename _Tp> |
| 403 |
bool |
| 404 |
__raise_and_add(_Tp& __val, int __base, unsigned char __c) |
| 405 |
{ |
| 406 |
if (__builtin_mul_overflow(__val, __base, &__val) |
| 407 |
|| __builtin_add_overflow(__val, __c, &__val)) |
| 408 |
return false; |
| 409 |
return true; |
| 410 |
} |
| 411 |
|
| 412 |
/// std::from_chars implementation for integers in base 2. |
| 413 |
template<typename _Tp> |
| 414 |
bool |
| 415 |
__from_chars_binary(const char*& __first, const char* __last, _Tp& __val) |
| 416 |
{ |
| 417 |
static_assert(is_integral<_Tp>::value, "implementation bug"); |
| 418 |
static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
| 419 |
|
| 420 |
const ptrdiff_t __len = __last - __first; |
| 421 |
ptrdiff_t __i = 0; |
| 422 |
while (__i < __len && __first[__i] == '0') |
| 423 |
++__i; |
| 424 |
const ptrdiff_t __leading_zeroes = __i; |
| 425 |
|
| 426 |
while (__i < __len) |
| 427 |
{ |
| 428 |
const unsigned char __c = (unsigned)__first[__i] - '0'; |
| 429 |
if (__c < 2) |
| 430 |
__val = (__val << 1) | __c; |
| 431 |
else |
| 432 |
break; |
| 433 |
__i++; |
| 434 |
} |
| 435 |
__first += __i; |
| 436 |
return (__i - __leading_zeroes) <= __gnu_cxx::__int_traits<_Tp>::__digits; |
| 437 |
} |
| 438 |
|
| 439 |
/// std::from_chars implementation for integers in bases 3 to 10. |
| 440 |
template<typename _Tp> |
| 441 |
bool |
| 442 |
__from_chars_digit(const char*& __first, const char* __last, _Tp& __val, |
| 443 |
int __base) |
| 444 |
{ |
| 445 |
static_assert(is_integral<_Tp>::value, "implementation bug"); |
| 446 |
static_assert(is_unsigned<_Tp>::value, "implementation bug"); |
| 447 |
|
| 448 |
auto __matches = [__base](char __c) { |
| 449 |
return '0' <= __c && __c <= ('0' + (__base - 1)); |
| 450 |
}; |
| 451 |
|
| 452 |
while (__first != __last) |
| 453 |
{ |
| 454 |
const char __c = *__first; |
| 455 |
if (__matches(__c)) |
| 456 |
{ |
| 457 |
if (!__raise_and_add(__val, __base, __c - '0')) |
| 458 |
{ |
| 459 |
while (++__first != __last && __matches(*__first)) |
| 460 |
; |
| 461 |
return false; |
| 462 |
} |
| 463 |
__first++; |
| 464 |
} |
| 465 |
else |
| 466 |
return true; |
| 467 |
} |
| 468 |
return true; |
| 469 |
} |
| 470 |
|
| 471 |
constexpr unsigned char |
| 472 |
__from_chars_alpha_to_num(char __c) |
| 473 |
{ |
| 474 |
switch (__c) |
| 475 |
{ |
| 476 |
case 'a': |
| 477 |
case 'A': |
| 478 |
return 10; |
| 479 |
case 'b': |
| 480 |
case 'B': |
| 481 |
return 11; |
| 482 |
case 'c': |
| 483 |
case 'C': |
| 484 |
return 12; |
| 485 |
case 'd': |
| 486 |
case 'D': |
| 487 |
return 13; |
| 488 |
case 'e': |
| 489 |
case 'E': |
| 490 |
return 14; |
| 491 |
case 'f': |
| 492 |
case 'F': |
| 493 |
return 15; |
| 494 |
case 'g': |
| 495 |
case 'G': |
| 496 |
return 16; |
| 497 |
case 'h': |
| 498 |
case 'H': |
| 499 |
return 17; |
| 500 |
case 'i': |
| 501 |
case 'I': |
| 502 |
return 18; |
| 503 |
case 'j': |
| 504 |
case 'J': |
| 505 |
return 19; |
| 506 |
case 'k': |
| 507 |
case 'K': |
| 508 |
return 20; |
| 509 |
case 'l': |
| 510 |
case 'L': |
| 511 |
return 21; |
| 512 |
case 'm': |
| 513 |
case 'M': |
| 514 |
return 22; |
| 515 |
case 'n': |
| 516 |
case 'N': |
| 517 |
return 23; |
| 518 |
case 'o': |
| 519 |
case 'O': |
| 520 |
return 24; |
| 521 |
case 'p': |
| 522 |
case 'P': |
| 523 |
return 25; |
| 524 |
case 'q': |
| 525 |
case 'Q': |
| 526 |
return 26; |
| 527 |
case 'r': |
| 528 |
case 'R': |
| 529 |
return 27; |
| 530 |
case 's': |
| 531 |
case 'S': |
| 532 |
return 28; |
| 533 |
case 't': |
| 534 |
case 'T': |
| 535 |
return 29; |
| 536 |
case 'u': |
| 537 |
case 'U': |
| 538 |
return 30; |
| 539 |
case 'v': |
| 540 |
case 'V': |
| 541 |
return 31; |
| 542 |
case 'w': |
| 543 |
case 'W': |
| 544 |
return 32; |
| 545 |
case 'x': |
| 546 |
case 'X': |
| 547 |
return 33; |
| 548 |
case 'y': |
| 549 |
case 'Y': |
| 550 |
return 34; |
| 551 |
case 'z': |
| 552 |
case 'Z': |
| 553 |
return 35; |
| 554 |
} |
| 555 |
return __gnu_cxx::__int_traits<unsigned char>::__max; |
| 556 |
} |
| 557 |
|
| 558 |
/// std::from_chars implementation for integers in bases 11 to 26. |
| 559 |
template<typename _Tp> |
| 560 |
bool |
| 561 |
__from_chars_alnum(const char*& __first, const char* __last, _Tp& __val, |
| 562 |
int __base) |
| 563 |
{ |
| 564 |
bool __valid = true; |
| 565 |
while (__first != __last) |
| 566 |
{ |
| 567 |
unsigned char __c = *__first; |
| 568 |
if (std::isdigit(__c)) |
| 569 |
__c -= '0'; |
| 570 |
else |
| 571 |
{ |
| 572 |
__c = __from_chars_alpha_to_num(__c); |
| 573 |
if (__c >= __base) |
| 574 |
break; |
| 575 |
} |
| 576 |
|
| 577 |
if (__builtin_expect(__valid, 1)) |
| 578 |
__valid = __raise_and_add(__val, __base, __c); |
| 579 |
__first++; |
| 580 |
} |
| 581 |
return __valid; |
| 582 |
} |
| 583 |
|
| 584 |
template<typename _Tp> |
| 585 |
using __integer_from_chars_result_type |
| 586 |
= enable_if_t<__or_<__is_signed_integer<_Tp>, |
| 587 |
__is_unsigned_integer<_Tp>, |
| 588 |
is_same<char, remove_cv_t<_Tp>>>::value, |
| 589 |
from_chars_result>; |
| 590 |
|
| 591 |
} // namespace __detail |
| 592 |
|
| 593 |
/// std::from_chars for integral types. |
| 594 |
template<typename _Tp> |
| 595 |
__detail::__integer_from_chars_result_type<_Tp> |
| 596 |
from_chars(const char* __first, const char* __last, _Tp& __value, |
| 597 |
int __base = 10) |
| 598 |
{ |
| 599 |
__glibcxx_assert(2 <= __base && __base <= 36); |
| 600 |
|
| 601 |
from_chars_result __res{__first, {}}; |
| 602 |
|
| 603 |
int __sign = 1; |
| 604 |
if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value) |
| 605 |
if (__first != __last && *__first == '-') |
| 606 |
{ |
| 607 |
__sign = -1; |
| 608 |
++__first; |
| 609 |
} |
| 610 |
|
| 611 |
using _Up = __detail::__unsigned_least_t<_Tp>; |
| 612 |
_Up __val = 0; |
| 613 |
|
| 614 |
const auto __start = __first; |
| 615 |
bool __valid; |
| 616 |
if (__base == 2) |
| 617 |
__valid = __detail::__from_chars_binary(__first, __last, __val); |
| 618 |
else if (__base <= 10) |
| 619 |
__valid = __detail::__from_chars_digit(__first, __last, __val, __base); |
| 620 |
else |
| 621 |
__valid = __detail::__from_chars_alnum(__first, __last, __val, __base); |
| 622 |
|
| 623 |
if (__builtin_expect(__first == __start, 0)) |
| 624 |
__res.ec = errc::invalid_argument; |
| 625 |
else |
| 626 |
{ |
| 627 |
__res.ptr = __first; |
| 628 |
if (!__valid) |
| 629 |
__res.ec = errc::result_out_of_range; |
| 630 |
else |
| 631 |
{ |
| 632 |
if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value) |
| 633 |
{ |
| 634 |
_Tp __tmp; |
| 635 |
if (__builtin_mul_overflow(__val, __sign, &__tmp)) |
| 636 |
__res.ec = errc::result_out_of_range; |
| 637 |
else |
| 638 |
__value = __tmp; |
| 639 |
} |
| 640 |
else |
| 641 |
{ |
| 642 |
if _GLIBCXX17_CONSTEXPR (__gnu_cxx::__int_traits<_Up>::__max |
| 643 |
> __gnu_cxx::__int_traits<_Tp>::__max) |
| 644 |
{ |
| 645 |
if (__val > __gnu_cxx::__int_traits<_Tp>::__max) |
| 646 |
__res.ec = errc::result_out_of_range; |
| 647 |
else |
| 648 |
__value = __val; |
| 649 |
} |
| 650 |
else |
| 651 |
__value = __val; |
| 652 |
} |
| 653 |
} |
| 654 |
} |
| 655 |
return __res; |
| 656 |
} |
| 657 |
|
| 658 |
/// floating-point format for primitive numerical conversion |
| 659 |
enum class chars_format |
| 660 |
{ |
| 661 |
scientific = 1, fixed = 2, hex = 4, general = fixed | scientific |
| 662 |
}; |
| 663 |
|
| 664 |
constexpr chars_format |
| 665 |
operator|(chars_format __lhs, chars_format __rhs) noexcept |
| 666 |
{ return (chars_format)((unsigned)__lhs | (unsigned)__rhs); } |
| 667 |
|
| 668 |
constexpr chars_format |
| 669 |
operator&(chars_format __lhs, chars_format __rhs) noexcept |
| 670 |
{ return (chars_format)((unsigned)__lhs & (unsigned)__rhs); } |
| 671 |
|
| 672 |
constexpr chars_format |
| 673 |
operator^(chars_format __lhs, chars_format __rhs) noexcept |
| 674 |
{ return (chars_format)((unsigned)__lhs ^ (unsigned)__rhs); } |
| 675 |
|
| 676 |
constexpr chars_format |
| 677 |
operator~(chars_format __fmt) noexcept |
| 678 |
{ return (chars_format)~(unsigned)__fmt; } |
| 679 |
|
| 680 |
constexpr chars_format& |
| 681 |
operator|=(chars_format& __lhs, chars_format __rhs) noexcept |
| 682 |
{ return __lhs = __lhs | __rhs; } |
| 683 |
|
| 684 |
constexpr chars_format& |
| 685 |
operator&=(chars_format& __lhs, chars_format __rhs) noexcept |
| 686 |
{ return __lhs = __lhs & __rhs; } |
| 687 |
|
| 688 |
constexpr chars_format& |
| 689 |
operator^=(chars_format& __lhs, chars_format __rhs) noexcept |
| 690 |
{ return __lhs = __lhs ^ __rhs; } |
| 691 |
|
| 692 |
#if _GLIBCXX_HAVE_USELOCALE |
| 693 |
from_chars_result |
| 694 |
from_chars(const char* __first, const char* __last, float& __value, |
| 695 |
chars_format __fmt = chars_format::general) noexcept; |
| 696 |
|
| 697 |
from_chars_result |
| 698 |
from_chars(const char* __first, const char* __last, double& __value, |
| 699 |
chars_format __fmt = chars_format::general) noexcept; |
| 700 |
|
| 701 |
from_chars_result |
| 702 |
from_chars(const char* __first, const char* __last, long double& __value, |
| 703 |
chars_format __fmt = chars_format::general) noexcept; |
| 704 |
#endif |
| 705 |
|
| 706 |
#if _GLIBCXX_FLOAT_IS_IEEE_BINARY32 && _GLIBCXX_DOUBLE_IS_IEEE_BINARY64 \ |
| 707 |
&& __SIZE_WIDTH__ >= 32 |
| 708 |
// Floating-point std::to_chars |
| 709 |
|
| 710 |
// Overloads for float. |
| 711 |
to_chars_result to_chars(char* __first, char* __last, float __value) noexcept; |
| 712 |
to_chars_result to_chars(char* __first, char* __last, float __value, |
| 713 |
chars_format __fmt) noexcept; |
| 714 |
to_chars_result to_chars(char* __first, char* __last, float __value, |
| 715 |
chars_format __fmt, int __precision) noexcept; |
| 716 |
|
| 717 |
// Overloads for double. |
| 718 |
to_chars_result to_chars(char* __first, char* __last, double __value) noexcept; |
| 719 |
to_chars_result to_chars(char* __first, char* __last, double __value, |
| 720 |
chars_format __fmt) noexcept; |
| 721 |
to_chars_result to_chars(char* __first, char* __last, double __value, |
| 722 |
chars_format __fmt, int __precision) noexcept; |
| 723 |
|
| 724 |
// Overloads for long double. |
| 725 |
to_chars_result to_chars(char* __first, char* __last, long double __value) |
| 726 |
noexcept; |
| 727 |
to_chars_result to_chars(char* __first, char* __last, long double __value, |
| 728 |
chars_format __fmt) noexcept; |
| 729 |
to_chars_result to_chars(char* __first, char* __last, long double __value, |
| 730 |
chars_format __fmt, int __precision) noexcept; |
| 731 |
#endif |
| 732 |
|
| 733 |
_GLIBCXX_END_NAMESPACE_VERSION |
| 734 |
} // namespace std |
| 735 |
#endif // C++14 |
| 736 |
#endif // _GLIBCXX_CHARCONV |
