29 #ifndef _GLIBCXX_CHARCONV
30 #define _GLIBCXX_CHARCONV 1
32 #pragma GCC system_header
38 #if __cplusplus >= 201402L
47 #if _GLIBCXX_HAVE_USELOCALE
48 # define __cpp_lib_to_chars 201611L
51 namespace std _GLIBCXX_VISIBILITY(default)
53 _GLIBCXX_BEGIN_NAMESPACE_VERSION
61 #if __cplusplus > 201703L && __cpp_impl_three_way_comparison >= 201907L
73 #if __cplusplus > 201703L && __cpp_impl_three_way_comparison >= 201907L
81 template<
typename _Tp>
82 using __integer_to_chars_result_type
84 __is_unsigned_integer<_Tp>,
93 template<
typename _Tp>
94 struct __to_chars_unsigned_type : __make_unsigned_selector_base
96 using _UInts = _List<
unsigned int,
unsigned long,
unsigned long long
97 #if _GLIBCXX_USE_INT128
101 using type =
typename __select<sizeof(_Tp), _UInts>::__type;
104 template<
typename _Tp>
105 using __unsigned_least_t =
typename __to_chars_unsigned_type<_Tp>::type;
109 template<
typename _Tp>
111 __to_chars_len(_Tp __value,
int __base ) noexcept;
113 template<
typename _Tp>
115 __to_chars_len_2(_Tp __value) noexcept
116 {
return std::__bit_width(__value); }
119 template<
typename _Tp>
121 __to_chars(
char* __first,
char* __last, _Tp __val,
int __base) noexcept
123 static_assert(is_integral<_Tp>::value,
"implementation bug");
124 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
126 to_chars_result __res;
128 const unsigned __len = __to_chars_len(__val,
__base);
130 if (__builtin_expect((__last - __first) < __len, 0))
133 __res.ec = errc::value_too_large;
137 unsigned __pos = __len - 1;
139 static constexpr
char __digits[] = {
140 '0',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
141 'a',
'b',
'c',
'd',
'e',
'f',
'g',
'h',
'i',
'j',
142 'k',
'l',
'm',
'n',
'o',
'p',
'q',
'r',
's',
't',
143 'u',
'v',
'w',
'x',
'y',
'z'
146 while (__val >= (
unsigned)
__base)
148 auto const __quo = __val /
__base;
149 auto const __rem = __val %
__base;
150 __first[__pos--] = __digits[__rem];
153 *__first = __digits[__val];
155 __res.ptr = __first + __len;
160 template<
typename _Tp>
161 __integer_to_chars_result_type<_Tp>
162 __to_chars_16(
char* __first,
char* __last, _Tp __val) noexcept
164 static_assert(is_integral<_Tp>::value,
"implementation bug");
165 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
167 to_chars_result __res;
169 const unsigned __len = (__to_chars_len_2(__val) + 3) / 4;
171 if (__builtin_expect((__last - __first) < __len, 0))
174 __res.ec = errc::value_too_large;
178 static constexpr
char __digits[] = {
179 '0',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
180 'a',
'b',
'c',
'd',
'e',
'f'
182 unsigned __pos = __len - 1;
183 while (__val >= 0x100)
185 auto __num = __val & 0xF;
187 __first[__pos] = __digits[__num];
190 __first[__pos - 1] = __digits[__num];
195 const auto __num = __val & 0xF;
197 __first[1] = __digits[__num];
198 __first[0] = __digits[__val];
201 __first[0] = __digits[__val];
202 __res.ptr = __first + __len;
207 template<
typename _Tp>
208 inline __integer_to_chars_result_type<_Tp>
209 __to_chars_10(
char* __first,
char* __last, _Tp __val) noexcept
211 static_assert(is_integral<_Tp>::value,
"implementation bug");
212 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
214 to_chars_result __res;
216 const unsigned __len = __to_chars_len(__val, 10);
218 if (__builtin_expect((__last - __first) < __len, 0))
221 __res.ec = errc::value_too_large;
225 __detail::__to_chars_10_impl(__first, __len, __val);
226 __res.ptr = __first + __len;
231 template<
typename _Tp>
232 __integer_to_chars_result_type<_Tp>
233 __to_chars_8(
char* __first,
char* __last, _Tp __val) noexcept
235 static_assert(is_integral<_Tp>::value,
"implementation bug");
236 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
238 to_chars_result __res;
243 __len = __val > 077777u ? 6u
244 : __val > 07777u ? 5u
251 __len = (__to_chars_len_2(__val) + 2) / 3;
253 if (__builtin_expect((__last - __first) < __len, 0))
256 __res.ec = errc::value_too_large;
260 unsigned __pos = __len - 1;
261 while (__val >= 0100)
263 auto __num = __val & 7;
265 __first[__pos] =
'0' + __num;
268 __first[__pos - 1] =
'0' + __num;
273 auto const __num = __val & 7;
275 __first[1] =
'0' + __num;
276 __first[0] =
'0' + __val;
279 __first[0] =
'0' + __val;
280 __res.ptr = __first + __len;
285 template<
typename _Tp>
286 __integer_to_chars_result_type<_Tp>
287 __to_chars_2(
char* __first,
char* __last, _Tp __val) noexcept
289 static_assert(is_integral<_Tp>::value,
"implementation bug");
290 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
292 to_chars_result __res;
294 const unsigned __len = __to_chars_len_2(__val);
296 if (__builtin_expect((__last - __first) < __len, 0))
299 __res.ec = errc::value_too_large;
303 unsigned __pos = __len - 1;
307 __first[__pos--] =
'0' + (__val & 1);
315 __res.ptr = __first + __len;
322 template<
typename _Tp>
323 __detail::__integer_to_chars_result_type<_Tp>
324 __to_chars_i(
char* __first,
char* __last, _Tp __value,
int __base = 10)
328 using _Up = __detail::__unsigned_least_t<_Tp>;
329 _Up __unsigned_val = __value;
331 if (__first == __last) [[__unlikely__]]
332 return { __last, errc::value_too_large };
337 return { __first + 1, errc{} };
340 if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value)
343 if (__builtin_expect(__first != __last, 1))
345 __unsigned_val = _Up(~__value) + _Up(1);
351 return __detail::__to_chars_16(__first, __last, __unsigned_val);
353 return __detail::__to_chars_10(__first, __last, __unsigned_val);
355 return __detail::__to_chars_8(__first, __last, __unsigned_val);
357 return __detail::__to_chars_2(__first, __last, __unsigned_val);
359 return __detail::__to_chars(__first, __last, __unsigned_val,
__base);
363 #define _GLIBCXX_TO_CHARS(T) \
364 inline to_chars_result \
365 to_chars(char* __first, char* __last, T __value, int __base = 10) \
366 { return std::__to_chars_i<T>(__first, __last, __value, __base); }
367 _GLIBCXX_TO_CHARS(
char)
368 _GLIBCXX_TO_CHARS(
signed char)
369 _GLIBCXX_TO_CHARS(
unsigned char)
370 _GLIBCXX_TO_CHARS(
signed short)
371 _GLIBCXX_TO_CHARS(
unsigned short)
372 _GLIBCXX_TO_CHARS(
signed int)
373 _GLIBCXX_TO_CHARS(
unsigned int)
374 _GLIBCXX_TO_CHARS(
signed long)
375 _GLIBCXX_TO_CHARS(
unsigned long)
376 _GLIBCXX_TO_CHARS(
signed long long)
377 _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)
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)
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)
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)
394 #undef _GLIBCXX_TO_CHARS
398 to_chars_result to_chars(
char*,
char*,
bool,
int = 10) =
delete;
402 template<
typename _Tp>
404 __raise_and_add(_Tp& __val,
int __base,
unsigned char __c)
406 if (__builtin_mul_overflow(__val, __base, &__val)
407 || __builtin_add_overflow(__val, __c, &__val))
413 template<
typename _Tp>
418 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
420 const ptrdiff_t __len = __last - __first;
422 while (__i < __len && __first[__i] ==
'0')
424 const ptrdiff_t __leading_zeroes = __i;
428 const unsigned char __c = (unsigned)__first[__i] -
'0';
430 __val = (__val << 1) | __c;
440 template<
typename _Tp>
446 static_assert(is_unsigned<_Tp>::value,
"implementation bug");
448 auto __matches = [
__base](
char __c) {
449 return '0' <= __c && __c <= (
'0' + (__base - 1));
452 while (__first != __last)
454 const char __c = *__first;
457 if (!__raise_and_add(__val, __base, __c -
'0'))
459 while (++__first != __last && __matches(*__first))
471 constexpr
unsigned char
472 __from_chars_alpha_to_num(
char __c)
559 template<
typename _Tp>
565 while (__first != __last)
567 unsigned char __c = *__first;
572 __c = __from_chars_alpha_to_num(__c);
577 if (__builtin_expect(__valid, 1))
578 __valid = __raise_and_add(__val, __base, __c);
584 template<
typename _Tp>
585 using __integer_from_chars_result_type
587 __is_unsigned_integer<_Tp>,
594 template<
typename _Tp>
595 __detail::__integer_from_chars_result_type<_Tp>
596 from_chars(
const char* __first,
const char* __last, _Tp& __value,
599 __glibcxx_assert(2 <= __base && __base <= 36);
604 if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value)
605 if (__first != __last && *__first ==
'-')
611 using _Up = __detail::__unsigned_least_t<_Tp>;
614 const auto __start = __first;
618 else if (__base <= 10)
623 if (__builtin_expect(__first == __start, 0))
624 __res.ec = errc::invalid_argument;
629 __res.ec = errc::result_out_of_range;
632 if _GLIBCXX17_CONSTEXPR (std::is_signed<_Tp>::value)
635 if (__builtin_mul_overflow(__val, __sign, &__tmp))
636 __res.ec = errc::result_out_of_range;
646 __res.ec = errc::result_out_of_range;
666 {
return (
chars_format)((unsigned)__lhs | (
unsigned)__rhs); }
670 {
return (
chars_format)((unsigned)__lhs & (
unsigned)__rhs); }
674 {
return (
chars_format)((unsigned)__lhs ^ (
unsigned)__rhs); }
682 {
return __lhs = __lhs | __rhs; }
686 {
return __lhs = __lhs & __rhs; }
690 {
return __lhs = __lhs ^ __rhs; }
692 #if _GLIBCXX_HAVE_USELOCALE
694 from_chars(
const char* __first,
const char* __last,
float& __value,
698 from_chars(const
char* __first, const
char* __last,
double& __value,
702 from_chars(const
char* __first, const
char* __last,
long double& __value,
706 #if _GLIBCXX_FLOAT_IS_IEEE_BINARY32 && _GLIBCXX_DOUBLE_IS_IEEE_BINARY64 \
707 && __SIZE_WIDTH__ >= 32
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,
714 to_chars_result to_chars(
char* __first,
char* __last,
float __value,
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,
721 to_chars_result to_chars(
char* __first,
char* __last,
double __value,
725 to_chars_result to_chars(
char* __first,
char* __last,
long double __value)
727 to_chars_result to_chars(
char* __first,
char* __last,
long double __value,
729 to_chars_result to_chars(
char* __first,
char* __last,
long double __value,
733 _GLIBCXX_END_NAMESPACE_VERSION
736 #endif // _GLIBCXX_CHARCONV
Result type of std::to_chars.
bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
ios_base & hex(ios_base &__base)
Calls base.setf(ios_base::hex, ios_base::basefield).
bool __from_chars_digit(const char *&__first, const char *__last, _Tp &__val, int __base)
std::from_chars implementation for integers in bases 3 to 10.
bool __from_chars_alnum(const char *&__first, const char *__last, _Tp &__val, int __base)
std::from_chars implementation for integers in bases 11 to 26.
typename enable_if< _Cond, _Tp >::type enable_if_t
Alias template for enable_if.
bool __from_chars_binary(const char *&__first, const char *__last, _Tp &__val)
std::from_chars implementation for integers in base 2.
bool isdigit(_CharT __c, const locale &__loc)
Convenience interface to ctype.is(ctype_base::digit, __c).
Result type of std::from_chars.
ios_base & fixed(ios_base &__base)
Calls base.setf(ios_base::fixed, ios_base::floatfield).
__detail::__integer_from_chars_result_type< _Tp > from_chars(const char *__first, const char *__last, _Tp &__value, int __base=10)
std::from_chars for integral types.
constexpr _Iterator __base(_Iterator __it)
ios_base & scientific(ios_base &__base)
Calls base.setf(ios_base::scientific, ios_base::floatfield).
__numeric_traits_integer< _Tp > __int_traits
Convenience alias for __numeric_traits<integer-type>.
bitset< _Nb > operator^(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
bitset< _Nb > operator|(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
chars_format
floating-point format for primitive numerical conversion