diff options
Diffstat (limited to 'r21/sources/cxx-stl/llvm-libc++/include/charconv')
| -rw-r--r-- | r21/sources/cxx-stl/llvm-libc++/include/charconv | 616 |
1 files changed, 0 insertions, 616 deletions
diff --git a/r21/sources/cxx-stl/llvm-libc++/include/charconv b/r21/sources/cxx-stl/llvm-libc++/include/charconv deleted file mode 100644 index a644fe094..000000000 --- a/r21/sources/cxx-stl/llvm-libc++/include/charconv +++ /dev/null @@ -1,616 +0,0 @@ -// -*- C++ -*- -//===------------------------------ charconv ------------------------------===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// - -#ifndef _LIBCPP_CHARCONV -#define _LIBCPP_CHARCONV - -/* - charconv synopsis - -namespace std { - - // floating-point format for primitive numerical conversion - enum class chars_format { - scientific = unspecified, - fixed = unspecified, - hex = unspecified, - general = fixed | scientific - }; - - // 23.20.2, primitive numerical output conversion - struct to_chars_result { - char* ptr; - errc ec; - }; - - to_chars_result to_chars(char* first, char* last, see below value, - int base = 10); - - to_chars_result to_chars(char* first, char* last, float value); - to_chars_result to_chars(char* first, char* last, double value); - to_chars_result to_chars(char* first, char* last, long double value); - - to_chars_result to_chars(char* first, char* last, float value, - chars_format fmt); - to_chars_result to_chars(char* first, char* last, double value, - chars_format fmt); - to_chars_result to_chars(char* first, char* last, long double value, - chars_format fmt); - - to_chars_result to_chars(char* first, char* last, float value, - chars_format fmt, int precision); - to_chars_result to_chars(char* first, char* last, double value, - chars_format fmt, int precision); - to_chars_result to_chars(char* first, char* last, long double value, - chars_format fmt, int precision); - - // 23.20.3, primitive numerical input conversion - struct from_chars_result { - const char* ptr; - errc ec; - }; - - from_chars_result from_chars(const char* first, const char* last, - see below& value, int base = 10); - - from_chars_result from_chars(const char* first, const char* last, - float& value, - chars_format fmt = chars_format::general); - from_chars_result from_chars(const char* first, const char* last, - double& value, - chars_format fmt = chars_format::general); - from_chars_result from_chars(const char* first, const char* last, - long double& value, - chars_format fmt = chars_format::general); - -} // namespace std - -*/ - -#include <__errc> -#include <type_traits> -#include <limits> -#include <stdint.h> -#include <string.h> -#include <math.h> - -#include <__debug> - -#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) -#pragma GCC system_header -#endif - -_LIBCPP_PUSH_MACROS -#include <__undef_macros> - -_LIBCPP_BEGIN_NAMESPACE_STD - -namespace __itoa { -_LIBCPP_FUNC_VIS char* __u64toa(uint64_t __value, char* __buffer); -_LIBCPP_FUNC_VIS char* __u32toa(uint32_t __value, char* __buffer); -} - -#ifndef _LIBCPP_CXX03_LANG - -enum class _LIBCPP_ENUM_VIS chars_format -{ - scientific = 0x1, - fixed = 0x2, - hex = 0x4, - general = fixed | scientific -}; - -struct _LIBCPP_TYPE_VIS to_chars_result -{ - char* ptr; - errc ec; -}; - -struct _LIBCPP_TYPE_VIS from_chars_result -{ - const char* ptr; - errc ec; -}; - -void to_chars(char*, char*, bool, int = 10) = delete; -void from_chars(const char*, const char*, bool, int = 10) = delete; - -namespace __itoa -{ - -static _LIBCPP_CONSTEXPR uint64_t __pow10_64[] = { - UINT64_C(0), - UINT64_C(10), - UINT64_C(100), - UINT64_C(1000), - UINT64_C(10000), - UINT64_C(100000), - UINT64_C(1000000), - UINT64_C(10000000), - UINT64_C(100000000), - UINT64_C(1000000000), - UINT64_C(10000000000), - UINT64_C(100000000000), - UINT64_C(1000000000000), - UINT64_C(10000000000000), - UINT64_C(100000000000000), - UINT64_C(1000000000000000), - UINT64_C(10000000000000000), - UINT64_C(100000000000000000), - UINT64_C(1000000000000000000), - UINT64_C(10000000000000000000), -}; - -static _LIBCPP_CONSTEXPR uint32_t __pow10_32[] = { - UINT32_C(0), UINT32_C(10), UINT32_C(100), - UINT32_C(1000), UINT32_C(10000), UINT32_C(100000), - UINT32_C(1000000), UINT32_C(10000000), UINT32_C(100000000), - UINT32_C(1000000000), -}; - -template <typename _Tp, typename = void> -struct _LIBCPP_HIDDEN __traits_base -{ - using type = uint64_t; - -#if !defined(_LIBCPP_COMPILER_MSVC) - static _LIBCPP_INLINE_VISIBILITY int __width(_Tp __v) - { - auto __t = (64 - __builtin_clzll(__v | 1)) * 1233 >> 12; - return __t - (__v < __pow10_64[__t]) + 1; - } -#endif - - static _LIBCPP_INLINE_VISIBILITY char* __convert(_Tp __v, char* __p) - { - return __u64toa(__v, __p); - } - - static _LIBCPP_INLINE_VISIBILITY decltype(__pow10_64)& __pow() { return __pow10_64; } -}; - -template <typename _Tp> -struct _LIBCPP_HIDDEN - __traits_base<_Tp, decltype(void(uint32_t{declval<_Tp>()}))> -{ - using type = uint32_t; - -#if !defined(_LIBCPP_COMPILER_MSVC) - static _LIBCPP_INLINE_VISIBILITY int __width(_Tp __v) - { - auto __t = (32 - __builtin_clz(__v | 1)) * 1233 >> 12; - return __t - (__v < __pow10_32[__t]) + 1; - } -#endif - - static _LIBCPP_INLINE_VISIBILITY char* __convert(_Tp __v, char* __p) - { - return __u32toa(__v, __p); - } - - static _LIBCPP_INLINE_VISIBILITY decltype(__pow10_32)& __pow() { return __pow10_32; } -}; - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY bool -__mul_overflowed(unsigned char __a, _Tp __b, unsigned char& __r) -{ - auto __c = __a * __b; - __r = __c; - return __c > (numeric_limits<unsigned char>::max)(); -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY bool -__mul_overflowed(unsigned short __a, _Tp __b, unsigned short& __r) -{ - auto __c = __a * __b; - __r = __c; - return __c > (numeric_limits<unsigned short>::max)(); -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY bool -__mul_overflowed(_Tp __a, _Tp __b, _Tp& __r) -{ - static_assert(is_unsigned<_Tp>::value, ""); -#if !defined(_LIBCPP_COMPILER_MSVC) - return __builtin_mul_overflow(__a, __b, &__r); -#else - bool __did = __b && ((numeric_limits<_Tp>::max)() / __b) < __a; - __r = __a * __b; - return __did; -#endif -} - -template <typename _Tp, typename _Up> -inline _LIBCPP_INLINE_VISIBILITY bool -__mul_overflowed(_Tp __a, _Up __b, _Tp& __r) -{ - return __mul_overflowed(__a, static_cast<_Tp>(__b), __r); -} - -template <typename _Tp> -struct _LIBCPP_HIDDEN __traits : __traits_base<_Tp> -{ - static _LIBCPP_CONSTEXPR int digits = numeric_limits<_Tp>::digits10 + 1; - using __traits_base<_Tp>::__pow; - using typename __traits_base<_Tp>::type; - - // precondition: at least one non-zero character available - static _LIBCPP_INLINE_VISIBILITY char const* - __read(char const* __p, char const* __ep, type& __a, type& __b) - { - type __cprod[digits]; - int __j = digits - 1; - int __i = digits; - do - { - if (!('0' <= *__p && *__p <= '9')) - break; - __cprod[--__i] = *__p++ - '0'; - } while (__p != __ep && __i != 0); - - __a = __inner_product(__cprod + __i + 1, __cprod + __j, __pow() + 1, - __cprod[__i]); - if (__mul_overflowed(__cprod[__j], __pow()[__j - __i], __b)) - --__p; - return __p; - } - - template <typename _It1, typename _It2, class _Up> - static _LIBCPP_INLINE_VISIBILITY _Up - __inner_product(_It1 __first1, _It1 __last1, _It2 __first2, _Up __init) - { - for (; __first1 < __last1; ++__first1, ++__first2) - __init = __init + *__first1 * *__first2; - return __init; - } -}; - -} // namespace __itoa - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY _Tp -__complement(_Tp __x) -{ - static_assert(is_unsigned<_Tp>::value, "cast to unsigned first"); - return _Tp(~__x + 1); -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY typename make_unsigned<_Tp>::type -__to_unsigned(_Tp __x) -{ - return static_cast<typename make_unsigned<_Tp>::type>(__x); -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY to_chars_result -__to_chars_itoa(char* __first, char* __last, _Tp __value, true_type) -{ - auto __x = __to_unsigned(__value); - if (__value < 0 && __first != __last) - { - *__first++ = '-'; - __x = __complement(__x); - } - - return __to_chars_itoa(__first, __last, __x, false_type()); -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY to_chars_result -__to_chars_itoa(char* __first, char* __last, _Tp __value, false_type) -{ - using __tx = __itoa::__traits<_Tp>; - auto __diff = __last - __first; - -#if !defined(_LIBCPP_COMPILER_MSVC) - if (__tx::digits <= __diff || __tx::__width(__value) <= __diff) - return {__tx::__convert(__value, __first), errc(0)}; - else - return {__last, errc::value_too_large}; -#else - if (__tx::digits <= __diff) - return {__tx::__convert(__value, __first), {}}; - else - { - char __buf[__tx::digits]; - auto __p = __tx::__convert(__value, __buf); - auto __len = __p - __buf; - if (__len <= __diff) - { - memcpy(__first, __buf, __len); - return {__first + __len, {}}; - } - else - return {__last, errc::value_too_large}; - } -#endif -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY to_chars_result -__to_chars_integral(char* __first, char* __last, _Tp __value, int __base, - true_type) -{ - auto __x = __to_unsigned(__value); - if (__value < 0 && __first != __last) - { - *__first++ = '-'; - __x = __complement(__x); - } - - return __to_chars_integral(__first, __last, __x, __base, false_type()); -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY to_chars_result -__to_chars_integral(char* __first, char* __last, _Tp __value, int __base, - false_type) -{ - if (__base == 10) - return __to_chars_itoa(__first, __last, __value, false_type()); - - auto __p = __last; - while (__p != __first) - { - auto __c = __value % __base; - __value /= __base; - *--__p = "0123456789abcdefghijklmnopqrstuvwxyz"[__c]; - if (__value == 0) - break; - } - - auto __len = __last - __p; - if (__value != 0 || !__len) - return {__last, errc::value_too_large}; - else - { - memmove(__first, __p, __len); - return {__first + __len, {}}; - } -} - -template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY to_chars_result -to_chars(char* __first, char* __last, _Tp __value) -{ - return __to_chars_itoa(__first, __last, __value, is_signed<_Tp>()); -} - -template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY to_chars_result -to_chars(char* __first, char* __last, _Tp __value, int __base) -{ - _LIBCPP_ASSERT(2 <= __base && __base <= 36, "base not in [2, 36]"); - return __to_chars_integral(__first, __last, __value, __base, - is_signed<_Tp>()); -} - -template <typename _It, typename _Tp, typename _Fn, typename... _Ts> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -__sign_combinator(_It __first, _It __last, _Tp& __value, _Fn __f, _Ts... __args) -{ - using __tl = numeric_limits<_Tp>; - decltype(__to_unsigned(__value)) __x; - - bool __neg = (__first != __last && *__first == '-'); - auto __r = __f(__neg ? __first + 1 : __first, __last, __x, __args...); - switch (__r.ec) - { - case errc::invalid_argument: - return {__first, __r.ec}; - case errc::result_out_of_range: - return __r; - default: - break; - } - - if (__neg) - { - if (__x <= __complement(__to_unsigned(__tl::min()))) - { - __x = __complement(__x); - memcpy(&__value, &__x, sizeof(__x)); - return __r; - } - } - else - { - if (__x <= (__tl::max)()) - { - __value = __x; - return __r; - } - } - - return {__r.ptr, errc::result_out_of_range}; -} - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY bool -__in_pattern(_Tp __c) -{ - return '0' <= __c && __c <= '9'; -} - -struct _LIBCPP_HIDDEN __in_pattern_result -{ - bool __ok; - int __val; - - explicit _LIBCPP_INLINE_VISIBILITY operator bool() const { return __ok; } -}; - -template <typename _Tp> -inline _LIBCPP_INLINE_VISIBILITY __in_pattern_result -__in_pattern(_Tp __c, int __base) -{ - if (__base <= 10) - return {'0' <= __c && __c < '0' + __base, __c - '0'}; - else if (__in_pattern(__c)) - return {true, __c - '0'}; - else if ('a' <= __c && __c < 'a' + __base - 10) - return {true, __c - 'a' + 10}; - else - return {'A' <= __c && __c < 'A' + __base - 10, __c - 'A' + 10}; -} - -template <typename _It, typename _Tp, typename _Fn, typename... _Ts> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -__subject_seq_combinator(_It __first, _It __last, _Tp& __value, _Fn __f, - _Ts... __args) -{ - auto __find_non_zero = [](_It __first, _It __last) { - for (; __first != __last; ++__first) - if (*__first != '0') - break; - return __first; - }; - - auto __p = __find_non_zero(__first, __last); - if (__p == __last || !__in_pattern(*__p, __args...)) - { - if (__p == __first) - return {__first, errc::invalid_argument}; - else - { - __value = 0; - return {__p, {}}; - } - } - - auto __r = __f(__p, __last, __value, __args...); - if (__r.ec == errc::result_out_of_range) - { - for (; __r.ptr != __last; ++__r.ptr) - { - if (!__in_pattern(*__r.ptr, __args...)) - break; - } - } - - return __r; -} - -template <typename _Tp, typename enable_if<is_unsigned<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -__from_chars_atoi(const char* __first, const char* __last, _Tp& __value) -{ - using __tx = __itoa::__traits<_Tp>; - using __output_type = typename __tx::type; - - return __subject_seq_combinator( - __first, __last, __value, - [](const char* __first, const char* __last, - _Tp& __value) -> from_chars_result { - __output_type __a, __b; - auto __p = __tx::__read(__first, __last, __a, __b); - if (__p == __last || !__in_pattern(*__p)) - { - __output_type __m = (numeric_limits<_Tp>::max)(); - if (__m >= __a && __m - __a >= __b) - { - __value = __a + __b; - return {__p, {}}; - } - } - return {__p, errc::result_out_of_range}; - }); -} - -template <typename _Tp, typename enable_if<is_signed<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -__from_chars_atoi(const char* __first, const char* __last, _Tp& __value) -{ - using __t = decltype(__to_unsigned(__value)); - return __sign_combinator(__first, __last, __value, __from_chars_atoi<__t>); -} - -template <typename _Tp, typename enable_if<is_unsigned<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -__from_chars_integral(const char* __first, const char* __last, _Tp& __value, - int __base) -{ - if (__base == 10) - return __from_chars_atoi(__first, __last, __value); - - return __subject_seq_combinator( - __first, __last, __value, - [](const char* __p, const char* __last, _Tp& __value, - int __base) -> from_chars_result { - using __tl = numeric_limits<_Tp>; - auto __digits = __tl::digits / log2f(float(__base)); - _Tp __a = __in_pattern(*__p++, __base).__val, __b = 0; - - for (int __i = 1; __p != __last; ++__i, ++__p) - { - if (auto __c = __in_pattern(*__p, __base)) - { - if (__i < __digits - 1) - __a = __a * __base + __c.__val; - else - { - if (!__itoa::__mul_overflowed(__a, __base, __a)) - ++__p; - __b = __c.__val; - break; - } - } - else - break; - } - - if (__p == __last || !__in_pattern(*__p, __base)) - { - if ((__tl::max)() - __a >= __b) - { - __value = __a + __b; - return {__p, {}}; - } - } - return {__p, errc::result_out_of_range}; - }, - __base); -} - -template <typename _Tp, typename enable_if<is_signed<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -__from_chars_integral(const char* __first, const char* __last, _Tp& __value, - int __base) -{ - using __t = decltype(__to_unsigned(__value)); - return __sign_combinator(__first, __last, __value, - __from_chars_integral<__t>, __base); -} - -template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -from_chars(const char* __first, const char* __last, _Tp& __value) -{ - return __from_chars_atoi(__first, __last, __value); -} - -template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0> -inline _LIBCPP_INLINE_VISIBILITY from_chars_result -from_chars(const char* __first, const char* __last, _Tp& __value, int __base) -{ - _LIBCPP_ASSERT(2 <= __base && __base <= 36, "base not in [2, 36]"); - return __from_chars_integral(__first, __last, __value, __base); -} - -#endif // _LIBCPP_CXX03_LANG - -_LIBCPP_END_NAMESPACE_STD - -_LIBCPP_POP_MACROS - -#endif // _LIBCPP_CHARCONV |