libcxx/src/charconv.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include <charconv>
  10 #include <string.h>
  11
  12 #include "include/from_chars_floating_point.h"
  13 #include "include/to_chars_floating_point.h"
  14
  15 _LIBCPP_BEGIN_NAMESPACE_STD
  16
  17 #ifndef _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
  18
  19 namespace __itoa {
  20
  21 _LIBCPP_EXPORTED_FROM_ABI char* __u32toa(uint32_t value, char* buffer) noexcept { return __base_10_u32(buffer, value); }
  22
  23 _LIBCPP_EXPORTED_FROM_ABI char* __u64toa(uint64_t value, char* buffer) noexcept { return __base_10_u64(buffer, value); }
  24
  25 } // namespace __itoa
  26
  27 #endif // _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
  28
  29 // The original version of floating-point to_chars was written by Microsoft and
  30 // contributed with the following license.
  31
  32 // Copyright (c) Microsoft Corporation.
  33 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  34
  35 // This implementation is dedicated to the memory of Mary and Thavatchai.
  36
  37 to_chars_result to_chars(char* __first, char* __last, float __value) {
  38   return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
  39 }
  40
  41 to_chars_result to_chars(char* __first, char* __last, double __value) {
  42   return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(__first, __last, __value, chars_format{}, 0);
  43 }
  44
  45 to_chars_result to_chars(char* __first, char* __last, long double __value) {
  46   return _Floating_to_chars<_Floating_to_chars_overload::_Plain>(
  47       __first, __last, static_cast<double>(__value), chars_format{}, 0);
  48 }
  49
  50 to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt) {
  51   return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
  52 }
  53
  54 to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt) {
  55   return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(__first, __last, __value, __fmt, 0);
  56 }
  57
  58 to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt) {
  59   return _Floating_to_chars<_Floating_to_chars_overload::_Format_only>(
  60       __first, __last, static_cast<double>(__value), __fmt, 0);
  61 }
  62
  63 to_chars_result to_chars(char* __first, char* __last, float __value, chars_format __fmt, int __precision) {
  64   return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
  65       __first, __last, __value, __fmt, __precision);
  66 }
  67
  68 to_chars_result to_chars(char* __first, char* __last, double __value, chars_format __fmt, int __precision) {
  69   return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
  70       __first, __last, __value, __fmt, __precision);
  71 }
  72
  73 to_chars_result to_chars(char* __first, char* __last, long double __value, chars_format __fmt, int __precision) {
  74   return _Floating_to_chars<_Floating_to_chars_overload::_Format_precision>(
  75       __first, __last, static_cast<double>(__value), __fmt, __precision);
  76 }
  77
  78 template <class _Fp>
  79 __from_chars_result<_Fp> __from_chars_floating_point(
  80     _LIBCPP_NOESCAPE const char* __first, _LIBCPP_NOESCAPE const char* __last, chars_format __fmt) {
  81   return std::__from_chars_floating_point_impl<_Fp>(__first, __last, __fmt);
  82 }
  83
  84 template __from_chars_result<float> __from_chars_floating_point(
  85     _LIBCPP_NOESCAPE const char* __first, _LIBCPP_NOESCAPE const char* __last, chars_format __fmt);
  86
  87 template __from_chars_result<double> __from_chars_floating_point(
  88     _LIBCPP_NOESCAPE const char* __first, _LIBCPP_NOESCAPE const char* __last, chars_format __fmt);
  89 _LIBCPP_END_NAMESPACE_STD