/Users/buildslave/jenkins/workspace/coverage/llvm-project/libcxx/src/include/ryu/ryu.h
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1 | | // -*- C++ -*- |
2 | | //===----------------------------------------------------------------------===// |
3 | | // |
4 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
5 | | // See https://llvm.org/LICENSE.txt for license information. |
6 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
7 | | // |
8 | | //===----------------------------------------------------------------------===// |
9 | | |
10 | | // Copyright (c) Microsoft Corporation. |
11 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
12 | | |
13 | | |
14 | | // Copyright 2018 Ulf Adams |
15 | | // Copyright (c) Microsoft Corporation. All rights reserved. |
16 | | |
17 | | // Boost Software License - Version 1.0 - August 17th, 2003 |
18 | | |
19 | | // Permission is hereby granted, free of charge, to any person or organization |
20 | | // obtaining a copy of the software and accompanying documentation covered by |
21 | | // this license (the "Software") to use, reproduce, display, distribute, |
22 | | // execute, and transmit the Software, and to prepare derivative works of the |
23 | | // Software, and to permit third-parties to whom the Software is furnished to |
24 | | // do so, all subject to the following: |
25 | | |
26 | | // The copyright notices in the Software and this entire statement, including |
27 | | // the above license grant, this restriction and the following disclaimer, |
28 | | // must be included in all copies of the Software, in whole or in part, and |
29 | | // all derivative works of the Software, unless such copies or derivative |
30 | | // works are solely in the form of machine-executable object code generated by |
31 | | // a source language processor. |
32 | | |
33 | | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
34 | | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
35 | | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
36 | | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
37 | | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
38 | | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
39 | | // DEALINGS IN THE SOFTWARE. |
40 | | |
41 | | #ifndef _LIBCPP_SRC_INCLUDE_RYU_RYU_H |
42 | | #define _LIBCPP_SRC_INCLUDE_RYU_RYU_H |
43 | | |
44 | | // Avoid formatting to keep the changes with the original code minimal. |
45 | | // clang-format off |
46 | | |
47 | | #include <__charconv/chars_format.h> |
48 | | #include <__charconv/to_chars_result.h> |
49 | | #include <__config> |
50 | | #include <__debug> |
51 | | #include <__errc> |
52 | | #include <cstdint> |
53 | | #include <cstring> |
54 | | #include <type_traits> |
55 | | |
56 | | #include "include/ryu/f2s.h" |
57 | | #include "include/ryu/d2s.h" |
58 | | #include "include/ryu/d2fixed.h" |
59 | | |
60 | | #if defined(_MSC_VER) |
61 | | #include <intrin.h> // for _umul128(), __shiftright128(), _BitScanForward{,64} |
62 | | #endif // defined(_MSC_VER) |
63 | | |
64 | | #if defined(_WIN64) || defined(_M_AMD64) || defined(__x86_64__) || defined(__aarch64__) |
65 | | #define _LIBCPP_64_BIT |
66 | | #endif |
67 | | |
68 | | _LIBCPP_BEGIN_NAMESPACE_STD |
69 | | |
70 | | // https://github.com/ulfjack/ryu/tree/59661c3/ryu |
71 | | |
72 | | #if !defined(_MSC_VER) |
73 | 0 | _LIBCPP_HIDE_FROM_ABI inline unsigned char _BitScanForward64(unsigned long* __index, unsigned long long __mask) { |
74 | 0 | if (__mask == 0) { |
75 | 0 | return false; |
76 | 0 | } |
77 | 0 | *__index = __builtin_ctzll(__mask); |
78 | 0 | return true; |
79 | 0 | } |
80 | | |
81 | 0 | _LIBCPP_HIDE_FROM_ABI inline unsigned char _BitScanForward(unsigned long* __index, unsigned int __mask) { |
82 | 0 | if (__mask == 0) { |
83 | 0 | return false; |
84 | 0 | } |
85 | 0 | *__index = __builtin_ctz(__mask); |
86 | 0 | return true; |
87 | 0 | } |
88 | | #endif // !_MSC_VER |
89 | | |
90 | | template <class _Floating> |
91 | | [[nodiscard]] to_chars_result _Floating_to_chars_ryu( |
92 | 0 | char* const _First, char* const _Last, const _Floating _Value, const chars_format _Fmt) noexcept { |
93 | 0 | if constexpr (_IsSame<_Floating, float>::value) { |
94 | 0 | return __f2s_buffered_n(_First, _Last, _Value, _Fmt); |
95 | 0 | } else { |
96 | 0 | return __d2s_buffered_n(_First, _Last, _Value, _Fmt); |
97 | 0 | } |
98 | 0 | } Unexecuted instantiation: std::__1::to_chars_result std::__1::_Floating_to_chars_ryu<float>(char*, char*, float, std::__1::chars_format) Unexecuted instantiation: std::__1::to_chars_result std::__1::_Floating_to_chars_ryu<double>(char*, char*, double, std::__1::chars_format) |
99 | | |
100 | | template <class _Floating> |
101 | | [[nodiscard]] _LIBCPP_HIDE_FROM_ABI to_chars_result _Floating_to_chars_scientific_precision( |
102 | 0 | char* const _First, char* const _Last, const _Floating _Value, int _Precision) noexcept { |
103 | | |
104 | | // C11 7.21.6.1 "The fprintf function"/5: |
105 | | // "A negative precision argument is taken as if the precision were omitted." |
106 | | // /8: "e,E [...] if the precision is missing, it is taken as 6" |
107 | |
|
108 | 0 | if (_Precision < 0) { |
109 | 0 | _Precision = 6; |
110 | 0 | } else if (_Precision < 1'000'000'000) { // Match ' to fix compilation with GCC in C++11 mode |
111 | | // _Precision is ok. |
112 | 0 | } else { |
113 | | // Avoid integer overflow. |
114 | | // (This defensive check is slightly nonconformant; it can be carefully improved in the future.) |
115 | 0 | return {_Last, errc::value_too_large}; |
116 | 0 | } |
117 | | |
118 | 0 | return __d2exp_buffered_n(_First, _Last, _Value, static_cast<uint32_t>(_Precision)); |
119 | 0 | } Unexecuted instantiation: std::__1::to_chars_result std::__1::_Floating_to_chars_scientific_precision<float>(char*, char*, float, int) Unexecuted instantiation: std::__1::to_chars_result std::__1::_Floating_to_chars_scientific_precision<double>(char*, char*, double, int) |
120 | | |
121 | | template <class _Floating> |
122 | | [[nodiscard]] _LIBCPP_HIDE_FROM_ABI to_chars_result _Floating_to_chars_fixed_precision( |
123 | 0 | char* const _First, char* const _Last, const _Floating _Value, int _Precision) noexcept { |
124 | | |
125 | | // C11 7.21.6.1 "The fprintf function"/5: |
126 | | // "A negative precision argument is taken as if the precision were omitted." |
127 | | // /8: "f,F [...] If the precision is missing, it is taken as 6" |
128 | |
|
129 | 0 | if (_Precision < 0) { |
130 | 0 | _Precision = 6; |
131 | 0 | } else if (_Precision < 1'000'000'000) { // Match ' to fix compilation with GCC in C++11 mode |
132 | | // _Precision is ok. |
133 | 0 | } else { |
134 | | // Avoid integer overflow. |
135 | | // (This defensive check is slightly nonconformant; it can be carefully improved in the future.) |
136 | 0 | return {_Last, errc::value_too_large}; |
137 | 0 | } |
138 | | |
139 | 0 | return __d2fixed_buffered_n(_First, _Last, _Value, static_cast<uint32_t>(_Precision)); |
140 | 0 | } Unexecuted instantiation: std::__1::to_chars_result std::__1::_Floating_to_chars_fixed_precision<float>(char*, char*, float, int) Unexecuted instantiation: std::__1::to_chars_result std::__1::_Floating_to_chars_fixed_precision<double>(char*, char*, double, int) |
141 | | |
142 | | #undef _LIBCPP_64_BIT |
143 | | #undef _LIBCPP_INTRINSIC128 |
144 | | |
145 | | _LIBCPP_END_NAMESPACE_STD |
146 | | |
147 | | // clang-format on |
148 | | |
149 | | #endif // _LIBCPP_SRC_INCLUDE_RYU_RYU_H |