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156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
89 lines
3.7 KiB
C++
Vendored
89 lines
3.7 KiB
C++
Vendored
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <charconv>
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#include <string.h>
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#include "include/from_chars_floating_point.h"
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#include "include/to_chars_floating_point.h"
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_LIBCPP_BEGIN_NAMESPACE_STD
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#ifndef _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
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namespace __itoa {
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_LIBCPP_EXPORTED_FROM_ABI char* __u32toa(uint32_t value, char* buffer) noexcept { return __base_10_u32(buffer, value); }
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_LIBCPP_EXPORTED_FROM_ABI char* __u64toa(uint64_t value, char* buffer) noexcept { return __base_10_u64(buffer, value); }
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} // namespace __itoa
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#endif // _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
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// The original version of floating-point to_chars was written by Microsoft and
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// contributed with the following license.
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// Copyright (c) Microsoft Corporation.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// This implementation is dedicated to the memory of Mary and Thavatchai.
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to_chars_result to_chars(char* __first, char* __last, float __value) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
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}
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to_chars_result to_chars(char* __first, char* __last, double __value) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
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}
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to_chars_result to_chars(char* __first, char* __last, long double __value) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(
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__first, __last, static_cast<double>(__value), chars_format{}, 0);
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}
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to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
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}
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to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
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}
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to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(
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__first, __last, static_cast<double>(__value), __fmt, 0);
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}
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to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
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__first, __last, __value, __fmt, __precision);
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}
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to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
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__first, __last, __value, __fmt, __precision);
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}
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to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision) {
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return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
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__first, __last, static_cast<double>(__value), __fmt, __precision);
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}
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template <class _Fp>
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__from_chars_result<_Fp> __from_chars_floating_point(
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_LIBCPP_NOESCAPE const char* __first, _LIBCPP_NOESCAPE const char* __last, chars_format __fmt) {
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return std::__from_chars_floating_point_impl<_Fp>(__first, __last, __fmt);
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}
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template __from_chars_result<float> __from_chars_floating_point(
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_LIBCPP_NOESCAPE const char* __first, _LIBCPP_NOESCAPE const char* __last, chars_format __fmt);
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template __from_chars_result<double> __from_chars_floating_point(
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_LIBCPP_NOESCAPE const char* __first, _LIBCPP_NOESCAPE const char* __last, chars_format __fmt);
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_LIBCPP_END_NAMESPACE_STD
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