1 // Locale support -*- C++ -*-
3 // Copyright (C) 1997-2017 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 /** @file bits/locale_facets.tcc
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{locale}
30 #ifndef _LOCALE_FACETS_TCC
31 #define _LOCALE_FACETS_TCC 1
33 #pragma GCC system_header
35 namespace std _GLIBCXX_VISIBILITY(default)
37 _GLIBCXX_BEGIN_NAMESPACE_VERSION
39 // Routine to access a cache for the facet. If the cache didn't
40 // exist before, it gets constructed on the fly.
41 template<typename _Facet>
45 operator() (const locale& __loc) const;
49 template<typename _CharT>
50 struct __use_cache<__numpunct_cache<_CharT> >
52 const __numpunct_cache<_CharT>*
53 operator() (const locale& __loc) const
55 const size_t __i = numpunct<_CharT>::id._M_id();
56 const locale::facet** __caches = __loc._M_impl->_M_caches;
59 __numpunct_cache<_CharT>* __tmp = 0;
62 __tmp = new __numpunct_cache<_CharT>;
63 __tmp->_M_cache(__loc);
68 __throw_exception_again;
70 __loc._M_impl->_M_install_cache(__tmp, __i);
72 return static_cast<const __numpunct_cache<_CharT>*>(__caches[__i]);
76 template<typename _CharT>
78 __numpunct_cache<_CharT>::_M_cache(const locale& __loc)
80 const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
83 _CharT* __truename = 0;
84 _CharT* __falsename = 0;
87 const string& __g = __np.grouping();
88 _M_grouping_size = __g.size();
89 __grouping = new char[_M_grouping_size];
90 __g.copy(__grouping, _M_grouping_size);
91 _M_use_grouping = (_M_grouping_size
92 && static_cast<signed char>(__grouping[0]) > 0
94 != __gnu_cxx::__numeric_traits<char>::__max));
96 const basic_string<_CharT>& __tn = __np.truename();
97 _M_truename_size = __tn.size();
98 __truename = new _CharT[_M_truename_size];
99 __tn.copy(__truename, _M_truename_size);
101 const basic_string<_CharT>& __fn = __np.falsename();
102 _M_falsename_size = __fn.size();
103 __falsename = new _CharT[_M_falsename_size];
104 __fn.copy(__falsename, _M_falsename_size);
106 _M_decimal_point = __np.decimal_point();
107 _M_thousands_sep = __np.thousands_sep();
109 const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__loc);
110 __ct.widen(__num_base::_S_atoms_out,
111 __num_base::_S_atoms_out
112 + __num_base::_S_oend, _M_atoms_out);
113 __ct.widen(__num_base::_S_atoms_in,
114 __num_base::_S_atoms_in
115 + __num_base::_S_iend, _M_atoms_in);
117 _M_grouping = __grouping;
118 _M_truename = __truename;
119 _M_falsename = __falsename;
124 delete [] __grouping;
125 delete [] __truename;
126 delete [] __falsename;
127 __throw_exception_again;
131 // Used by both numeric and monetary facets.
132 // Check to make sure that the __grouping_tmp string constructed in
133 // money_get or num_get matches the canonical grouping for a given
135 // __grouping_tmp is parsed L to R
136 // 1,222,444 == __grouping_tmp of "\1\3\3"
137 // __grouping is parsed R to L
138 // 1,222,444 == __grouping of "\3" == "\3\3\3"
140 __verify_grouping(const char* __grouping, size_t __grouping_size,
141 const string& __grouping_tmp) throw ();
143 _GLIBCXX_BEGIN_NAMESPACE_LDBL
145 template<typename _CharT, typename _InIter>
146 _GLIBCXX_DEFAULT_ABI_TAG
148 num_get<_CharT, _InIter>::
149 _M_extract_float(_InIter __beg, _InIter __end, ios_base& __io,
150 ios_base::iostate& __err, string& __xtrc) const
152 typedef char_traits<_CharT> __traits_type;
153 typedef __numpunct_cache<_CharT> __cache_type;
154 __use_cache<__cache_type> __uc;
155 const locale& __loc = __io._M_getloc();
156 const __cache_type* __lc = __uc(__loc);
157 const _CharT* __lit = __lc->_M_atoms_in;
158 char_type __c = char_type();
160 // True if __beg becomes equal to __end.
161 bool __testeof = __beg == __end;
163 // First check for sign.
167 const bool __plus = __c == __lit[__num_base::_S_iplus];
168 if ((__plus || __c == __lit[__num_base::_S_iminus])
169 && !(__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
170 && !(__c == __lc->_M_decimal_point))
172 __xtrc += __plus ? '+' : '-';
173 if (++__beg != __end)
180 // Next, look for leading zeros.
181 bool __found_mantissa = false;
185 if ((__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
186 || __c == __lc->_M_decimal_point)
188 else if (__c == __lit[__num_base::_S_izero])
190 if (!__found_mantissa)
193 __found_mantissa = true;
197 if (++__beg != __end)
206 // Only need acceptable digits for floating point numbers.
207 bool __found_dec = false;
208 bool __found_sci = false;
209 string __found_grouping;
210 if (__lc->_M_use_grouping)
211 __found_grouping.reserve(32);
212 const char_type* __lit_zero = __lit + __num_base::_S_izero;
214 if (!__lc->_M_allocated)
218 const int __digit = _M_find(__lit_zero, 10, __c);
221 __xtrc += '0' + __digit;
222 __found_mantissa = true;
224 else if (__c == __lc->_M_decimal_point
225 && !__found_dec && !__found_sci)
230 else if ((__c == __lit[__num_base::_S_ie]
231 || __c == __lit[__num_base::_S_iE])
232 && !__found_sci && __found_mantissa)
234 // Scientific notation.
238 // Remove optional plus or minus sign, if they exist.
239 if (++__beg != __end)
242 const bool __plus = __c == __lit[__num_base::_S_iplus];
243 if (__plus || __c == __lit[__num_base::_S_iminus])
244 __xtrc += __plus ? '+' : '-';
257 if (++__beg != __end)
265 // According to 22.2.2.1.2, p8-9, first look for thousands_sep
266 // and decimal_point.
267 if (__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
269 if (!__found_dec && !__found_sci)
271 // NB: Thousands separator at the beginning of a string
272 // is a no-no, as is two consecutive thousands separators.
275 __found_grouping += static_cast<char>(__sep_pos);
280 // NB: __convert_to_v will not assign __v and will
289 else if (__c == __lc->_M_decimal_point)
291 if (!__found_dec && !__found_sci)
293 // If no grouping chars are seen, no grouping check
294 // is applied. Therefore __found_grouping is adjusted
295 // only if decimal_point comes after some thousands_sep.
296 if (__found_grouping.size())
297 __found_grouping += static_cast<char>(__sep_pos);
306 const char_type* __q =
307 __traits_type::find(__lit_zero, 10, __c);
310 __xtrc += '0' + (__q - __lit_zero);
311 __found_mantissa = true;
314 else if ((__c == __lit[__num_base::_S_ie]
315 || __c == __lit[__num_base::_S_iE])
316 && !__found_sci && __found_mantissa)
318 // Scientific notation.
319 if (__found_grouping.size() && !__found_dec)
320 __found_grouping += static_cast<char>(__sep_pos);
324 // Remove optional plus or minus sign, if they exist.
325 if (++__beg != __end)
328 const bool __plus = __c == __lit[__num_base::_S_iplus];
329 if ((__plus || __c == __lit[__num_base::_S_iminus])
330 && !(__lc->_M_use_grouping
331 && __c == __lc->_M_thousands_sep)
332 && !(__c == __lc->_M_decimal_point))
333 __xtrc += __plus ? '+' : '-';
347 if (++__beg != __end)
353 // Digit grouping is checked. If grouping and found_grouping don't
354 // match, then get very very upset, and set failbit.
355 if (__found_grouping.size())
357 // Add the ending grouping if a decimal or 'e'/'E' wasn't found.
358 if (!__found_dec && !__found_sci)
359 __found_grouping += static_cast<char>(__sep_pos);
361 if (!std::__verify_grouping(__lc->_M_grouping,
362 __lc->_M_grouping_size,
364 __err = ios_base::failbit;
370 template<typename _CharT, typename _InIter>
371 template<typename _ValueT>
372 _GLIBCXX_DEFAULT_ABI_TAG
374 num_get<_CharT, _InIter>::
375 _M_extract_int(_InIter __beg, _InIter __end, ios_base& __io,
376 ios_base::iostate& __err, _ValueT& __v) const
378 typedef char_traits<_CharT> __traits_type;
379 using __gnu_cxx::__add_unsigned;
380 typedef typename __add_unsigned<_ValueT>::__type __unsigned_type;
381 typedef __numpunct_cache<_CharT> __cache_type;
382 __use_cache<__cache_type> __uc;
383 const locale& __loc = __io._M_getloc();
384 const __cache_type* __lc = __uc(__loc);
385 const _CharT* __lit = __lc->_M_atoms_in;
386 char_type __c = char_type();
388 // NB: Iff __basefield == 0, __base can change based on contents.
389 const ios_base::fmtflags __basefield = __io.flags()
390 & ios_base::basefield;
391 const bool __oct = __basefield == ios_base::oct;
392 int __base = __oct ? 8 : (__basefield == ios_base::hex ? 16 : 10);
394 // True if __beg becomes equal to __end.
395 bool __testeof = __beg == __end;
397 // First check for sign.
398 bool __negative = false;
402 __negative = __c == __lit[__num_base::_S_iminus];
403 if ((__negative || __c == __lit[__num_base::_S_iplus])
404 && !(__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
405 && !(__c == __lc->_M_decimal_point))
407 if (++__beg != __end)
414 // Next, look for leading zeros and check required digits
416 bool __found_zero = false;
420 if ((__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
421 || __c == __lc->_M_decimal_point)
423 else if (__c == __lit[__num_base::_S_izero]
424 && (!__found_zero || __base == 10))
428 if (__basefield == 0)
433 else if (__found_zero
434 && (__c == __lit[__num_base::_S_ix]
435 || __c == __lit[__num_base::_S_iX]))
437 if (__basefield == 0)
441 __found_zero = false;
450 if (++__beg != __end)
460 // At this point, base is determined. If not hex, only allow
461 // base digits as valid input.
462 const size_t __len = (__base == 16 ? __num_base::_S_iend
463 - __num_base::_S_izero : __base);
466 typedef __gnu_cxx::__numeric_traits<_ValueT> __num_traits;
467 string __found_grouping;
468 if (__lc->_M_use_grouping)
469 __found_grouping.reserve(32);
470 bool __testfail = false;
471 bool __testoverflow = false;
472 const __unsigned_type __max =
473 (__negative && __num_traits::__is_signed)
474 ? -static_cast<__unsigned_type>(__num_traits::__min)
475 : __num_traits::__max;
476 const __unsigned_type __smax = __max / __base;
477 __unsigned_type __result = 0;
479 const char_type* __lit_zero = __lit + __num_base::_S_izero;
481 if (!__lc->_M_allocated)
485 __digit = _M_find(__lit_zero, __len, __c);
489 if (__result > __smax)
490 __testoverflow = true;
494 __testoverflow |= __result > __max - __digit;
499 if (++__beg != __end)
507 // According to 22.2.2.1.2, p8-9, first look for thousands_sep
508 // and decimal_point.
509 if (__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
511 // NB: Thousands separator at the beginning of a string
512 // is a no-no, as is two consecutive thousands separators.
515 __found_grouping += static_cast<char>(__sep_pos);
524 else if (__c == __lc->_M_decimal_point)
528 const char_type* __q =
529 __traits_type::find(__lit_zero, __len, __c);
533 __digit = __q - __lit_zero;
536 if (__result > __smax)
537 __testoverflow = true;
541 __testoverflow |= __result > __max - __digit;
547 if (++__beg != __end)
553 // Digit grouping is checked. If grouping and found_grouping don't
554 // match, then get very very upset, and set failbit.
555 if (__found_grouping.size())
557 // Add the ending grouping.
558 __found_grouping += static_cast<char>(__sep_pos);
560 if (!std::__verify_grouping(__lc->_M_grouping,
561 __lc->_M_grouping_size,
563 __err = ios_base::failbit;
566 // _GLIBCXX_RESOLVE_LIB_DEFECTS
567 // 23. Num_get overflow result.
568 if ((!__sep_pos && !__found_zero && !__found_grouping.size())
572 __err = ios_base::failbit;
574 else if (__testoverflow)
576 if (__negative && __num_traits::__is_signed)
577 __v = __num_traits::__min;
579 __v = __num_traits::__max;
580 __err = ios_base::failbit;
583 __v = __negative ? -__result : __result;
586 __err |= ios_base::eofbit;
590 // _GLIBCXX_RESOLVE_LIB_DEFECTS
591 // 17. Bad bool parsing
592 template<typename _CharT, typename _InIter>
594 num_get<_CharT, _InIter>::
595 do_get(iter_type __beg, iter_type __end, ios_base& __io,
596 ios_base::iostate& __err, bool& __v) const
598 if (!(__io.flags() & ios_base::boolalpha))
600 // Parse bool values as long.
601 // NB: We can't just call do_get(long) here, as it might
602 // refer to a derived class.
604 __beg = _M_extract_int(__beg, __end, __io, __err, __l);
605 if (__l == 0 || __l == 1)
609 // _GLIBCXX_RESOLVE_LIB_DEFECTS
610 // 23. Num_get overflow result.
612 __err = ios_base::failbit;
614 __err |= ios_base::eofbit;
619 // Parse bool values as alphanumeric.
620 typedef __numpunct_cache<_CharT> __cache_type;
621 __use_cache<__cache_type> __uc;
622 const locale& __loc = __io._M_getloc();
623 const __cache_type* __lc = __uc(__loc);
627 bool __donef = __lc->_M_falsename_size == 0;
628 bool __donet = __lc->_M_truename_size == 0;
629 bool __testeof = false;
631 while (!__donef || !__donet)
639 const char_type __c = *__beg;
642 __testf = __c == __lc->_M_falsename[__n];
644 if (!__testf && __donet)
648 __testt = __c == __lc->_M_truename[__n];
650 if (!__testt && __donef)
653 if (!__testt && !__testf)
659 __donef = !__testf || __n >= __lc->_M_falsename_size;
660 __donet = !__testt || __n >= __lc->_M_truename_size;
662 if (__testf && __n == __lc->_M_falsename_size && __n)
665 if (__testt && __n == __lc->_M_truename_size)
666 __err = ios_base::failbit;
668 __err = __testeof ? ios_base::eofbit : ios_base::goodbit;
670 else if (__testt && __n == __lc->_M_truename_size && __n)
673 __err = __testeof ? ios_base::eofbit : ios_base::goodbit;
677 // _GLIBCXX_RESOLVE_LIB_DEFECTS
678 // 23. Num_get overflow result.
680 __err = ios_base::failbit;
682 __err |= ios_base::eofbit;
688 template<typename _CharT, typename _InIter>
690 num_get<_CharT, _InIter>::
691 do_get(iter_type __beg, iter_type __end, ios_base& __io,
692 ios_base::iostate& __err, float& __v) const
696 __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
697 std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
699 __err |= ios_base::eofbit;
703 template<typename _CharT, typename _InIter>
705 num_get<_CharT, _InIter>::
706 do_get(iter_type __beg, iter_type __end, ios_base& __io,
707 ios_base::iostate& __err, double& __v) const
711 __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
712 std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
714 __err |= ios_base::eofbit;
718 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
719 template<typename _CharT, typename _InIter>
721 num_get<_CharT, _InIter>::
722 __do_get(iter_type __beg, iter_type __end, ios_base& __io,
723 ios_base::iostate& __err, double& __v) const
727 __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
728 std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
730 __err |= ios_base::eofbit;
735 template<typename _CharT, typename _InIter>
737 num_get<_CharT, _InIter>::
738 do_get(iter_type __beg, iter_type __end, ios_base& __io,
739 ios_base::iostate& __err, long double& __v) const
743 __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
744 std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
746 __err |= ios_base::eofbit;
750 template<typename _CharT, typename _InIter>
752 num_get<_CharT, _InIter>::
753 do_get(iter_type __beg, iter_type __end, ios_base& __io,
754 ios_base::iostate& __err, void*& __v) const
756 // Prepare for hex formatted input.
757 typedef ios_base::fmtflags fmtflags;
758 const fmtflags __fmt = __io.flags();
759 __io.flags((__fmt & ~ios_base::basefield) | ios_base::hex);
761 typedef __gnu_cxx::__conditional_type<(sizeof(void*)
762 <= sizeof(unsigned long)),
763 unsigned long, unsigned long long>::__type _UIntPtrType;
766 __beg = _M_extract_int(__beg, __end, __io, __err, __ul);
768 // Reset from hex formatted input.
771 __v = reinterpret_cast<void*>(__ul);
775 // For use by integer and floating-point types after they have been
776 // converted into a char_type string.
777 template<typename _CharT, typename _OutIter>
779 num_put<_CharT, _OutIter>::
780 _M_pad(_CharT __fill, streamsize __w, ios_base& __io,
781 _CharT* __new, const _CharT* __cs, int& __len) const
783 // [22.2.2.2.2] Stage 3.
784 // If necessary, pad.
785 __pad<_CharT, char_traits<_CharT> >::_S_pad(__io, __fill, __new,
787 __len = static_cast<int>(__w);
790 _GLIBCXX_END_NAMESPACE_LDBL
792 template<typename _CharT, typename _ValueT>
794 __int_to_char(_CharT* __bufend, _ValueT __v, const _CharT* __lit,
795 ios_base::fmtflags __flags, bool __dec)
797 _CharT* __buf = __bufend;
798 if (__builtin_expect(__dec, true))
803 *--__buf = __lit[(__v % 10) + __num_base::_S_odigits];
808 else if ((__flags & ios_base::basefield) == ios_base::oct)
813 *--__buf = __lit[(__v & 0x7) + __num_base::_S_odigits];
821 const bool __uppercase = __flags & ios_base::uppercase;
822 const int __case_offset = __uppercase ? __num_base::_S_oudigits
823 : __num_base::_S_odigits;
826 *--__buf = __lit[(__v & 0xf) + __case_offset];
831 return __bufend - __buf;
834 _GLIBCXX_BEGIN_NAMESPACE_LDBL
836 template<typename _CharT, typename _OutIter>
838 num_put<_CharT, _OutIter>::
839 _M_group_int(const char* __grouping, size_t __grouping_size, _CharT __sep,
840 ios_base&, _CharT* __new, _CharT* __cs, int& __len) const
842 _CharT* __p = std::__add_grouping(__new, __sep, __grouping,
843 __grouping_size, __cs, __cs + __len);
847 template<typename _CharT, typename _OutIter>
848 template<typename _ValueT>
850 num_put<_CharT, _OutIter>::
851 _M_insert_int(_OutIter __s, ios_base& __io, _CharT __fill,
854 using __gnu_cxx::__add_unsigned;
855 typedef typename __add_unsigned<_ValueT>::__type __unsigned_type;
856 typedef __numpunct_cache<_CharT> __cache_type;
857 __use_cache<__cache_type> __uc;
858 const locale& __loc = __io._M_getloc();
859 const __cache_type* __lc = __uc(__loc);
860 const _CharT* __lit = __lc->_M_atoms_out;
861 const ios_base::fmtflags __flags = __io.flags();
863 // Long enough to hold hex, dec, and octal representations.
864 const int __ilen = 5 * sizeof(_ValueT);
865 _CharT* __cs = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
868 // [22.2.2.2.2] Stage 1, numeric conversion to character.
869 // Result is returned right-justified in the buffer.
870 const ios_base::fmtflags __basefield = __flags & ios_base::basefield;
871 const bool __dec = (__basefield != ios_base::oct
872 && __basefield != ios_base::hex);
873 const __unsigned_type __u = ((__v > 0 || !__dec)
874 ? __unsigned_type(__v)
875 : -__unsigned_type(__v));
876 int __len = __int_to_char(__cs + __ilen, __u, __lit, __flags, __dec);
877 __cs += __ilen - __len;
879 // Add grouping, if necessary.
880 if (__lc->_M_use_grouping)
882 // Grouping can add (almost) as many separators as the number
883 // of digits + space is reserved for numeric base or sign.
884 _CharT* __cs2 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
887 _M_group_int(__lc->_M_grouping, __lc->_M_grouping_size,
888 __lc->_M_thousands_sep, __io, __cs2 + 2, __cs, __len);
892 // Complete Stage 1, prepend numeric base or sign.
893 if (__builtin_expect(__dec, true))
898 if (bool(__flags & ios_base::showpos)
899 && __gnu_cxx::__numeric_traits<_ValueT>::__is_signed)
900 *--__cs = __lit[__num_base::_S_oplus], ++__len;
903 *--__cs = __lit[__num_base::_S_ominus], ++__len;
905 else if (bool(__flags & ios_base::showbase) && __v)
907 if (__basefield == ios_base::oct)
908 *--__cs = __lit[__num_base::_S_odigits], ++__len;
912 const bool __uppercase = __flags & ios_base::uppercase;
913 *--__cs = __lit[__num_base::_S_ox + __uppercase];
915 *--__cs = __lit[__num_base::_S_odigits];
921 const streamsize __w = __io.width();
922 if (__w > static_cast<streamsize>(__len))
924 _CharT* __cs3 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
926 _M_pad(__fill, __w, __io, __cs3, __cs, __len);
931 // [22.2.2.2.2] Stage 4.
932 // Write resulting, fully-formatted string to output iterator.
933 return std::__write(__s, __cs, __len);
936 template<typename _CharT, typename _OutIter>
938 num_put<_CharT, _OutIter>::
939 _M_group_float(const char* __grouping, size_t __grouping_size,
940 _CharT __sep, const _CharT* __p, _CharT* __new,
941 _CharT* __cs, int& __len) const
943 // _GLIBCXX_RESOLVE_LIB_DEFECTS
944 // 282. What types does numpunct grouping refer to?
945 // Add grouping, if necessary.
946 const int __declen = __p ? __p - __cs : __len;
947 _CharT* __p2 = std::__add_grouping(__new, __sep, __grouping,
949 __cs, __cs + __declen);
951 // Tack on decimal part.
952 int __newlen = __p2 - __new;
955 char_traits<_CharT>::copy(__p2, __p, __len - __declen);
956 __newlen += __len - __declen;
961 // The following code uses vsnprintf (or vsprintf(), when
962 // _GLIBCXX_USE_C99_STDIO is not defined) to convert floating point
963 // values for insertion into a stream. An optimization would be to
964 // replace them with code that works directly on a wide buffer and
965 // then use __pad to do the padding. It would be good to replace
966 // them anyway to gain back the efficiency that C++ provides by
967 // knowing up front the type of the values to insert. Also, sprintf
968 // is dangerous since may lead to accidental buffer overruns. This
969 // implementation follows the C++ standard fairly directly as
970 // outlined in 22.2.2.2 [lib.locale.num.put]
971 template<typename _CharT, typename _OutIter>
972 template<typename _ValueT>
974 num_put<_CharT, _OutIter>::
975 _M_insert_float(_OutIter __s, ios_base& __io, _CharT __fill, char __mod,
978 typedef __numpunct_cache<_CharT> __cache_type;
979 __use_cache<__cache_type> __uc;
980 const locale& __loc = __io._M_getloc();
981 const __cache_type* __lc = __uc(__loc);
983 // Use default precision if out of range.
984 const streamsize __prec = __io.precision() < 0 ? 6 : __io.precision();
986 const int __max_digits =
987 __gnu_cxx::__numeric_traits<_ValueT>::__digits10;
989 // [22.2.2.2.2] Stage 1, numeric conversion to character.
991 // Long enough for the max format spec.
993 __num_base::_S_format_float(__io, __fbuf, __mod);
995 #if _GLIBCXX_USE_C99_STDIO
996 // Precision is always used except for hexfloat format.
997 const bool __use_prec =
998 (__io.flags() & ios_base::floatfield) != ios_base::floatfield;
1000 // First try a buffer perhaps big enough (most probably sufficient
1001 // for non-ios_base::fixed outputs)
1002 int __cs_size = __max_digits * 3;
1003 char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
1005 __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1006 __fbuf, __prec, __v);
1008 __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1011 // If the buffer was not large enough, try again with the correct size.
1012 if (__len >= __cs_size)
1014 __cs_size = __len + 1;
1015 __cs = static_cast<char*>(__builtin_alloca(__cs_size));
1017 __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1018 __fbuf, __prec, __v);
1020 __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1024 // Consider the possibility of long ios_base::fixed outputs
1025 const bool __fixed = __io.flags() & ios_base::fixed;
1026 const int __max_exp =
1027 __gnu_cxx::__numeric_traits<_ValueT>::__max_exponent10;
1029 // The size of the output string is computed as follows.
1030 // ios_base::fixed outputs may need up to __max_exp + 1 chars
1031 // for the integer part + __prec chars for the fractional part
1032 // + 3 chars for sign, decimal point, '\0'. On the other hand,
1033 // for non-fixed outputs __max_digits * 2 + __prec chars are
1034 // largely sufficient.
1035 const int __cs_size = __fixed ? __max_exp + __prec + 4
1036 : __max_digits * 2 + __prec;
1037 char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
1038 __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, __fbuf,
1042 // [22.2.2.2.2] Stage 2, convert to char_type, using correct
1043 // numpunct.decimal_point() values for '.' and adding grouping.
1044 const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
1046 _CharT* __ws = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1048 __ctype.widen(__cs, __cs + __len, __ws);
1050 // Replace decimal point.
1052 const char* __p = char_traits<char>::find(__cs, __len, '.');
1055 __wp = __ws + (__p - __cs);
1056 *__wp = __lc->_M_decimal_point;
1059 // Add grouping, if necessary.
1060 // N.B. Make sure to not group things like 2e20, i.e., no decimal
1061 // point, scientific notation.
1062 if (__lc->_M_use_grouping
1063 && (__wp || __len < 3 || (__cs[1] <= '9' && __cs[2] <= '9'
1064 && __cs[1] >= '0' && __cs[2] >= '0')))
1066 // Grouping can add (almost) as many separators as the
1067 // number of digits, but no more.
1068 _CharT* __ws2 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1071 streamsize __off = 0;
1072 if (__cs[0] == '-' || __cs[0] == '+')
1079 _M_group_float(__lc->_M_grouping, __lc->_M_grouping_size,
1080 __lc->_M_thousands_sep, __wp, __ws2 + __off,
1081 __ws + __off, __len);
1088 const streamsize __w = __io.width();
1089 if (__w > static_cast<streamsize>(__len))
1091 _CharT* __ws3 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1093 _M_pad(__fill, __w, __io, __ws3, __ws, __len);
1098 // [22.2.2.2.2] Stage 4.
1099 // Write resulting, fully-formatted string to output iterator.
1100 return std::__write(__s, __ws, __len);
1103 template<typename _CharT, typename _OutIter>
1105 num_put<_CharT, _OutIter>::
1106 do_put(iter_type __s, ios_base& __io, char_type __fill, bool __v) const
1108 const ios_base::fmtflags __flags = __io.flags();
1109 if ((__flags & ios_base::boolalpha) == 0)
1111 const long __l = __v;
1112 __s = _M_insert_int(__s, __io, __fill, __l);
1116 typedef __numpunct_cache<_CharT> __cache_type;
1117 __use_cache<__cache_type> __uc;
1118 const locale& __loc = __io._M_getloc();
1119 const __cache_type* __lc = __uc(__loc);
1121 const _CharT* __name = __v ? __lc->_M_truename
1122 : __lc->_M_falsename;
1123 int __len = __v ? __lc->_M_truename_size
1124 : __lc->_M_falsename_size;
1126 const streamsize __w = __io.width();
1127 if (__w > static_cast<streamsize>(__len))
1129 const streamsize __plen = __w - __len;
1131 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1134 char_traits<_CharT>::assign(__ps, __plen, __fill);
1137 if ((__flags & ios_base::adjustfield) == ios_base::left)
1139 __s = std::__write(__s, __name, __len);
1140 __s = std::__write(__s, __ps, __plen);
1144 __s = std::__write(__s, __ps, __plen);
1145 __s = std::__write(__s, __name, __len);
1150 __s = std::__write(__s, __name, __len);
1155 template<typename _CharT, typename _OutIter>
1157 num_put<_CharT, _OutIter>::
1158 do_put(iter_type __s, ios_base& __io, char_type __fill, double __v) const
1159 { return _M_insert_float(__s, __io, __fill, char(), __v); }
1161 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
1162 template<typename _CharT, typename _OutIter>
1164 num_put<_CharT, _OutIter>::
1165 __do_put(iter_type __s, ios_base& __io, char_type __fill, double __v) const
1166 { return _M_insert_float(__s, __io, __fill, char(), __v); }
1169 template<typename _CharT, typename _OutIter>
1171 num_put<_CharT, _OutIter>::
1172 do_put(iter_type __s, ios_base& __io, char_type __fill,
1173 long double __v) const
1174 { return _M_insert_float(__s, __io, __fill, 'L', __v); }
1176 template<typename _CharT, typename _OutIter>
1178 num_put<_CharT, _OutIter>::
1179 do_put(iter_type __s, ios_base& __io, char_type __fill,
1180 const void* __v) const
1182 const ios_base::fmtflags __flags = __io.flags();
1183 const ios_base::fmtflags __fmt = ~(ios_base::basefield
1184 | ios_base::uppercase);
1185 __io.flags((__flags & __fmt) | (ios_base::hex | ios_base::showbase));
1187 typedef __gnu_cxx::__conditional_type<(sizeof(const void*)
1188 <= sizeof(unsigned long)),
1189 unsigned long, unsigned long long>::__type _UIntPtrType;
1191 __s = _M_insert_int(__s, __io, __fill,
1192 reinterpret_cast<_UIntPtrType>(__v));
1193 __io.flags(__flags);
1197 _GLIBCXX_END_NAMESPACE_LDBL
1199 // Construct correctly padded string, as per 22.2.2.2.2
1201 // __newlen > __oldlen
1202 // __news is allocated for __newlen size
1204 // NB: Of the two parameters, _CharT can be deduced from the
1205 // function arguments. The other (_Traits) has to be explicitly specified.
1206 template<typename _CharT, typename _Traits>
1208 __pad<_CharT, _Traits>::_S_pad(ios_base& __io, _CharT __fill,
1209 _CharT* __news, const _CharT* __olds,
1210 streamsize __newlen, streamsize __oldlen)
1212 const size_t __plen = static_cast<size_t>(__newlen - __oldlen);
1213 const ios_base::fmtflags __adjust = __io.flags() & ios_base::adjustfield;
1216 if (__adjust == ios_base::left)
1218 _Traits::copy(__news, __olds, __oldlen);
1219 _Traits::assign(__news + __oldlen, __plen, __fill);
1224 if (__adjust == ios_base::internal)
1226 // Pad after the sign, if there is one.
1227 // Pad after 0[xX], if there is one.
1228 // Who came up with these rules, anyway? Jeeze.
1229 const locale& __loc = __io._M_getloc();
1230 const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
1232 if (__ctype.widen('-') == __olds[0]
1233 || __ctype.widen('+') == __olds[0])
1235 __news[0] = __olds[0];
1239 else if (__ctype.widen('0') == __olds[0]
1241 && (__ctype.widen('x') == __olds[1]
1242 || __ctype.widen('X') == __olds[1]))
1244 __news[0] = __olds[0];
1245 __news[1] = __olds[1];
1249 // else Padding first.
1251 _Traits::assign(__news, __plen, __fill);
1252 _Traits::copy(__news + __plen, __olds + __mod, __oldlen - __mod);
1255 template<typename _CharT>
1257 __add_grouping(_CharT* __s, _CharT __sep,
1258 const char* __gbeg, size_t __gsize,
1259 const _CharT* __first, const _CharT* __last)
1264 while (__last - __first > __gbeg[__idx]
1265 && static_cast<signed char>(__gbeg[__idx]) > 0
1266 && __gbeg[__idx] != __gnu_cxx::__numeric_traits<char>::__max)
1268 __last -= __gbeg[__idx];
1269 __idx < __gsize - 1 ? ++__idx : ++__ctr;
1272 while (__first != __last)
1273 *__s++ = *__first++;
1278 for (char __i = __gbeg[__idx]; __i > 0; --__i)
1279 *__s++ = *__first++;
1285 for (char __i = __gbeg[__idx]; __i > 0; --__i)
1286 *__s++ = *__first++;
1292 // Inhibit implicit instantiations for required instantiations,
1293 // which are defined via explicit instantiations elsewhere.
1294 #if _GLIBCXX_EXTERN_TEMPLATE
1295 extern template class _GLIBCXX_NAMESPACE_CXX11 numpunct<char>;
1296 extern template class _GLIBCXX_NAMESPACE_CXX11 numpunct_byname<char>;
1297 extern template class _GLIBCXX_NAMESPACE_LDBL num_get<char>;
1298 extern template class _GLIBCXX_NAMESPACE_LDBL num_put<char>;
1299 extern template class ctype_byname<char>;
1303 use_facet<ctype<char> >(const locale&);
1306 const numpunct<char>&
1307 use_facet<numpunct<char> >(const locale&);
1310 const num_put<char>&
1311 use_facet<num_put<char> >(const locale&);
1314 const num_get<char>&
1315 use_facet<num_get<char> >(const locale&);
1319 has_facet<ctype<char> >(const locale&);
1323 has_facet<numpunct<char> >(const locale&);
1327 has_facet<num_put<char> >(const locale&);
1331 has_facet<num_get<char> >(const locale&);
1333 #ifdef _GLIBCXX_USE_WCHAR_T
1334 extern template class _GLIBCXX_NAMESPACE_CXX11 numpunct<wchar_t>;
1335 extern template class _GLIBCXX_NAMESPACE_CXX11 numpunct_byname<wchar_t>;
1336 extern template class _GLIBCXX_NAMESPACE_LDBL num_get<wchar_t>;
1337 extern template class _GLIBCXX_NAMESPACE_LDBL num_put<wchar_t>;
1338 extern template class ctype_byname<wchar_t>;
1341 const ctype<wchar_t>&
1342 use_facet<ctype<wchar_t> >(const locale&);
1345 const numpunct<wchar_t>&
1346 use_facet<numpunct<wchar_t> >(const locale&);
1349 const num_put<wchar_t>&
1350 use_facet<num_put<wchar_t> >(const locale&);
1353 const num_get<wchar_t>&
1354 use_facet<num_get<wchar_t> >(const locale&);
1358 has_facet<ctype<wchar_t> >(const locale&);
1362 has_facet<numpunct<wchar_t> >(const locale&);
1366 has_facet<num_put<wchar_t> >(const locale&);
1370 has_facet<num_get<wchar_t> >(const locale&);
1374 _GLIBCXX_END_NAMESPACE_VERSION