libstdc++
locale_facets.tcc
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1 // Locale support -*- C++ -*-
2 
3 // Copyright (C) 1997-2017 Free Software Foundation, Inc.
4 //
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)
9 // any later version.
10 
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.
15 
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.
19 
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/>.
24 
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}
28  */
29 
30 #ifndef _LOCALE_FACETS_TCC
31 #define _LOCALE_FACETS_TCC 1
32 
33 #pragma GCC system_header
34 
35 namespace std _GLIBCXX_VISIBILITY(default)
36 {
37 _GLIBCXX_BEGIN_NAMESPACE_VERSION
38 
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>
42  struct __use_cache
43  {
44  const _Facet*
45  operator() (const locale& __loc) const;
46  };
47 
48  // Specializations.
49  template<typename _CharT>
50  struct __use_cache<__numpunct_cache<_CharT> >
51  {
52  const __numpunct_cache<_CharT>*
53  operator() (const locale& __loc) const
54  {
55  const size_t __i = numpunct<_CharT>::id._M_id();
56  const locale::facet** __caches = __loc._M_impl->_M_caches;
57  if (!__caches[__i])
58  {
59  __numpunct_cache<_CharT>* __tmp = 0;
60  __try
61  {
62  __tmp = new __numpunct_cache<_CharT>;
63  __tmp->_M_cache(__loc);
64  }
65  __catch(...)
66  {
67  delete __tmp;
68  __throw_exception_again;
69  }
70  __loc._M_impl->_M_install_cache(__tmp, __i);
71  }
72  return static_cast<const __numpunct_cache<_CharT>*>(__caches[__i]);
73  }
74  };
75 
76  template<typename _CharT>
77  void
78  __numpunct_cache<_CharT>::_M_cache(const locale& __loc)
79  {
80  const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
81 
82  char* __grouping = 0;
83  _CharT* __truename = 0;
84  _CharT* __falsename = 0;
85  __try
86  {
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
93  && (__grouping[0]
94  != __gnu_cxx::__numeric_traits<char>::__max));
95 
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);
100 
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);
105 
106  _M_decimal_point = __np.decimal_point();
107  _M_thousands_sep = __np.thousands_sep();
108 
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);
116 
117  _M_grouping = __grouping;
118  _M_truename = __truename;
119  _M_falsename = __falsename;
120  _M_allocated = true;
121  }
122  __catch(...)
123  {
124  delete [] __grouping;
125  delete [] __truename;
126  delete [] __falsename;
127  __throw_exception_again;
128  }
129  }
130 
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
134  // locale.
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"
139  _GLIBCXX_PURE bool
140  __verify_grouping(const char* __grouping, size_t __grouping_size,
141  const string& __grouping_tmp) throw ();
142 
143 _GLIBCXX_BEGIN_NAMESPACE_LDBL
144 
145  template<typename _CharT, typename _InIter>
146  _GLIBCXX_DEFAULT_ABI_TAG
147  _InIter
148  num_get<_CharT, _InIter>::
149  _M_extract_float(_InIter __beg, _InIter __end, ios_base& __io,
150  ios_base::iostate& __err, string& __xtrc) const
151  {
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();
159 
160  // True if __beg becomes equal to __end.
161  bool __testeof = __beg == __end;
162 
163  // First check for sign.
164  if (!__testeof)
165  {
166  __c = *__beg;
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))
171  {
172  __xtrc += __plus ? '+' : '-';
173  if (++__beg != __end)
174  __c = *__beg;
175  else
176  __testeof = true;
177  }
178  }
179 
180  // Next, look for leading zeros.
181  bool __found_mantissa = false;
182  int __sep_pos = 0;
183  while (!__testeof)
184  {
185  if ((__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
186  || __c == __lc->_M_decimal_point)
187  break;
188  else if (__c == __lit[__num_base::_S_izero])
189  {
190  if (!__found_mantissa)
191  {
192  __xtrc += '0';
193  __found_mantissa = true;
194  }
195  ++__sep_pos;
196 
197  if (++__beg != __end)
198  __c = *__beg;
199  else
200  __testeof = true;
201  }
202  else
203  break;
204  }
205 
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;
213 
214  if (!__lc->_M_allocated)
215  // "C" locale
216  while (!__testeof)
217  {
218  const int __digit = _M_find(__lit_zero, 10, __c);
219  if (__digit != -1)
220  {
221  __xtrc += '0' + __digit;
222  __found_mantissa = true;
223  }
224  else if (__c == __lc->_M_decimal_point
225  && !__found_dec && !__found_sci)
226  {
227  __xtrc += '.';
228  __found_dec = true;
229  }
230  else if ((__c == __lit[__num_base::_S_ie]
231  || __c == __lit[__num_base::_S_iE])
232  && !__found_sci && __found_mantissa)
233  {
234  // Scientific notation.
235  __xtrc += 'e';
236  __found_sci = true;
237 
238  // Remove optional plus or minus sign, if they exist.
239  if (++__beg != __end)
240  {
241  __c = *__beg;
242  const bool __plus = __c == __lit[__num_base::_S_iplus];
243  if (__plus || __c == __lit[__num_base::_S_iminus])
244  __xtrc += __plus ? '+' : '-';
245  else
246  continue;
247  }
248  else
249  {
250  __testeof = true;
251  break;
252  }
253  }
254  else
255  break;
256 
257  if (++__beg != __end)
258  __c = *__beg;
259  else
260  __testeof = true;
261  }
262  else
263  while (!__testeof)
264  {
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)
268  {
269  if (!__found_dec && !__found_sci)
270  {
271  // NB: Thousands separator at the beginning of a string
272  // is a no-no, as is two consecutive thousands separators.
273  if (__sep_pos)
274  {
275  __found_grouping += static_cast<char>(__sep_pos);
276  __sep_pos = 0;
277  }
278  else
279  {
280  // NB: __convert_to_v will not assign __v and will
281  // set the failbit.
282  __xtrc.clear();
283  break;
284  }
285  }
286  else
287  break;
288  }
289  else if (__c == __lc->_M_decimal_point)
290  {
291  if (!__found_dec && !__found_sci)
292  {
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);
298  __xtrc += '.';
299  __found_dec = true;
300  }
301  else
302  break;
303  }
304  else
305  {
306  const char_type* __q =
307  __traits_type::find(__lit_zero, 10, __c);
308  if (__q)
309  {
310  __xtrc += '0' + (__q - __lit_zero);
311  __found_mantissa = true;
312  ++__sep_pos;
313  }
314  else if ((__c == __lit[__num_base::_S_ie]
315  || __c == __lit[__num_base::_S_iE])
316  && !__found_sci && __found_mantissa)
317  {
318  // Scientific notation.
319  if (__found_grouping.size() && !__found_dec)
320  __found_grouping += static_cast<char>(__sep_pos);
321  __xtrc += 'e';
322  __found_sci = true;
323 
324  // Remove optional plus or minus sign, if they exist.
325  if (++__beg != __end)
326  {
327  __c = *__beg;
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 ? '+' : '-';
334  else
335  continue;
336  }
337  else
338  {
339  __testeof = true;
340  break;
341  }
342  }
343  else
344  break;
345  }
346 
347  if (++__beg != __end)
348  __c = *__beg;
349  else
350  __testeof = true;
351  }
352 
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())
356  {
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);
360 
361  if (!std::__verify_grouping(__lc->_M_grouping,
362  __lc->_M_grouping_size,
363  __found_grouping))
364  __err = ios_base::failbit;
365  }
366 
367  return __beg;
368  }
369 
370  template<typename _CharT, typename _InIter>
371  template<typename _ValueT>
372  _GLIBCXX_DEFAULT_ABI_TAG
373  _InIter
374  num_get<_CharT, _InIter>::
375  _M_extract_int(_InIter __beg, _InIter __end, ios_base& __io,
376  ios_base::iostate& __err, _ValueT& __v) const
377  {
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();
387 
388  // NB: Iff __basefield == 0, __base can change based on contents.
389  const ios_base::fmtflags __basefield = __io.flags()
391  const bool __oct = __basefield == ios_base::oct;
392  int __base = __oct ? 8 : (__basefield == ios_base::hex ? 16 : 10);
393 
394  // True if __beg becomes equal to __end.
395  bool __testeof = __beg == __end;
396 
397  // First check for sign.
398  bool __negative = false;
399  if (!__testeof)
400  {
401  __c = *__beg;
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))
406  {
407  if (++__beg != __end)
408  __c = *__beg;
409  else
410  __testeof = true;
411  }
412  }
413 
414  // Next, look for leading zeros and check required digits
415  // for base formats.
416  bool __found_zero = false;
417  int __sep_pos = 0;
418  while (!__testeof)
419  {
420  if ((__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
421  || __c == __lc->_M_decimal_point)
422  break;
423  else if (__c == __lit[__num_base::_S_izero]
424  && (!__found_zero || __base == 10))
425  {
426  __found_zero = true;
427  ++__sep_pos;
428  if (__basefield == 0)
429  __base = 8;
430  if (__base == 8)
431  __sep_pos = 0;
432  }
433  else if (__found_zero
434  && (__c == __lit[__num_base::_S_ix]
435  || __c == __lit[__num_base::_S_iX]))
436  {
437  if (__basefield == 0)
438  __base = 16;
439  if (__base == 16)
440  {
441  __found_zero = false;
442  __sep_pos = 0;
443  }
444  else
445  break;
446  }
447  else
448  break;
449 
450  if (++__beg != __end)
451  {
452  __c = *__beg;
453  if (!__found_zero)
454  break;
455  }
456  else
457  __testeof = true;
458  }
459 
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);
464 
465  // Extract.
466  string __found_grouping;
467  if (__lc->_M_use_grouping)
468  __found_grouping.reserve(32);
469  bool __testfail = false;
470  bool __testoverflow = false;
471  const __unsigned_type __max =
472  (__negative && __gnu_cxx::__numeric_traits<_ValueT>::__is_signed)
473  ? -__gnu_cxx::__numeric_traits<_ValueT>::__min
474  : __gnu_cxx::__numeric_traits<_ValueT>::__max;
475  const __unsigned_type __smax = __max / __base;
476  __unsigned_type __result = 0;
477  int __digit = 0;
478  const char_type* __lit_zero = __lit + __num_base::_S_izero;
479 
480  if (!__lc->_M_allocated)
481  // "C" locale
482  while (!__testeof)
483  {
484  __digit = _M_find(__lit_zero, __len, __c);
485  if (__digit == -1)
486  break;
487 
488  if (__result > __smax)
489  __testoverflow = true;
490  else
491  {
492  __result *= __base;
493  __testoverflow |= __result > __max - __digit;
494  __result += __digit;
495  ++__sep_pos;
496  }
497 
498  if (++__beg != __end)
499  __c = *__beg;
500  else
501  __testeof = true;
502  }
503  else
504  while (!__testeof)
505  {
506  // According to 22.2.2.1.2, p8-9, first look for thousands_sep
507  // and decimal_point.
508  if (__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
509  {
510  // NB: Thousands separator at the beginning of a string
511  // is a no-no, as is two consecutive thousands separators.
512  if (__sep_pos)
513  {
514  __found_grouping += static_cast<char>(__sep_pos);
515  __sep_pos = 0;
516  }
517  else
518  {
519  __testfail = true;
520  break;
521  }
522  }
523  else if (__c == __lc->_M_decimal_point)
524  break;
525  else
526  {
527  const char_type* __q =
528  __traits_type::find(__lit_zero, __len, __c);
529  if (!__q)
530  break;
531 
532  __digit = __q - __lit_zero;
533  if (__digit > 15)
534  __digit -= 6;
535  if (__result > __smax)
536  __testoverflow = true;
537  else
538  {
539  __result *= __base;
540  __testoverflow |= __result > __max - __digit;
541  __result += __digit;
542  ++__sep_pos;
543  }
544  }
545 
546  if (++__beg != __end)
547  __c = *__beg;
548  else
549  __testeof = true;
550  }
551 
552  // Digit grouping is checked. If grouping and found_grouping don't
553  // match, then get very very upset, and set failbit.
554  if (__found_grouping.size())
555  {
556  // Add the ending grouping.
557  __found_grouping += static_cast<char>(__sep_pos);
558 
559  if (!std::__verify_grouping(__lc->_M_grouping,
560  __lc->_M_grouping_size,
561  __found_grouping))
562  __err = ios_base::failbit;
563  }
564 
565  // _GLIBCXX_RESOLVE_LIB_DEFECTS
566  // 23. Num_get overflow result.
567  if ((!__sep_pos && !__found_zero && !__found_grouping.size())
568  || __testfail)
569  {
570  __v = 0;
571  __err = ios_base::failbit;
572  }
573  else if (__testoverflow)
574  {
575  if (__negative
576  && __gnu_cxx::__numeric_traits<_ValueT>::__is_signed)
577  __v = __gnu_cxx::__numeric_traits<_ValueT>::__min;
578  else
579  __v = __gnu_cxx::__numeric_traits<_ValueT>::__max;
580  __err = ios_base::failbit;
581  }
582  else
583  __v = __negative ? -__result : __result;
584 
585  if (__testeof)
586  __err |= ios_base::eofbit;
587  return __beg;
588  }
589 
590  // _GLIBCXX_RESOLVE_LIB_DEFECTS
591  // 17. Bad bool parsing
592  template<typename _CharT, typename _InIter>
593  _InIter
595  do_get(iter_type __beg, iter_type __end, ios_base& __io,
596  ios_base::iostate& __err, bool& __v) const
597  {
598  if (!(__io.flags() & ios_base::boolalpha))
599  {
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.
603  long __l = -1;
604  __beg = _M_extract_int(__beg, __end, __io, __err, __l);
605  if (__l == 0 || __l == 1)
606  __v = bool(__l);
607  else
608  {
609  // _GLIBCXX_RESOLVE_LIB_DEFECTS
610  // 23. Num_get overflow result.
611  __v = true;
612  __err = ios_base::failbit;
613  if (__beg == __end)
614  __err |= ios_base::eofbit;
615  }
616  }
617  else
618  {
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);
624 
625  bool __testf = true;
626  bool __testt = true;
627  bool __donef = __lc->_M_falsename_size == 0;
628  bool __donet = __lc->_M_truename_size == 0;
629  bool __testeof = false;
630  size_t __n = 0;
631  while (!__donef || !__donet)
632  {
633  if (__beg == __end)
634  {
635  __testeof = true;
636  break;
637  }
638 
639  const char_type __c = *__beg;
640 
641  if (!__donef)
642  __testf = __c == __lc->_M_falsename[__n];
643 
644  if (!__testf && __donet)
645  break;
646 
647  if (!__donet)
648  __testt = __c == __lc->_M_truename[__n];
649 
650  if (!__testt && __donef)
651  break;
652 
653  if (!__testt && !__testf)
654  break;
655 
656  ++__n;
657  ++__beg;
658 
659  __donef = !__testf || __n >= __lc->_M_falsename_size;
660  __donet = !__testt || __n >= __lc->_M_truename_size;
661  }
662  if (__testf && __n == __lc->_M_falsename_size && __n)
663  {
664  __v = false;
665  if (__testt && __n == __lc->_M_truename_size)
666  __err = ios_base::failbit;
667  else
668  __err = __testeof ? ios_base::eofbit : ios_base::goodbit;
669  }
670  else if (__testt && __n == __lc->_M_truename_size && __n)
671  {
672  __v = true;
673  __err = __testeof ? ios_base::eofbit : ios_base::goodbit;
674  }
675  else
676  {
677  // _GLIBCXX_RESOLVE_LIB_DEFECTS
678  // 23. Num_get overflow result.
679  __v = false;
680  __err = ios_base::failbit;
681  if (__testeof)
682  __err |= ios_base::eofbit;
683  }
684  }
685  return __beg;
686  }
687 
688  template<typename _CharT, typename _InIter>
689  _InIter
691  do_get(iter_type __beg, iter_type __end, ios_base& __io,
692  ios_base::iostate& __err, float& __v) const
693  {
694  string __xtrc;
695  __xtrc.reserve(32);
696  __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
697  std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
698  if (__beg == __end)
699  __err |= ios_base::eofbit;
700  return __beg;
701  }
702 
703  template<typename _CharT, typename _InIter>
704  _InIter
706  do_get(iter_type __beg, iter_type __end, ios_base& __io,
707  ios_base::iostate& __err, double& __v) const
708  {
709  string __xtrc;
710  __xtrc.reserve(32);
711  __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
712  std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
713  if (__beg == __end)
714  __err |= ios_base::eofbit;
715  return __beg;
716  }
717 
718 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
719  template<typename _CharT, typename _InIter>
720  _InIter
722  __do_get(iter_type __beg, iter_type __end, ios_base& __io,
723  ios_base::iostate& __err, double& __v) const
724  {
725  string __xtrc;
726  __xtrc.reserve(32);
727  __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
728  std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
729  if (__beg == __end)
730  __err |= ios_base::eofbit;
731  return __beg;
732  }
733 #endif
734 
735  template<typename _CharT, typename _InIter>
736  _InIter
738  do_get(iter_type __beg, iter_type __end, ios_base& __io,
739  ios_base::iostate& __err, long double& __v) const
740  {
741  string __xtrc;
742  __xtrc.reserve(32);
743  __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
744  std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
745  if (__beg == __end)
746  __err |= ios_base::eofbit;
747  return __beg;
748  }
749 
750  template<typename _CharT, typename _InIter>
751  _InIter
753  do_get(iter_type __beg, iter_type __end, ios_base& __io,
754  ios_base::iostate& __err, void*& __v) const
755  {
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);
760 
761  typedef __gnu_cxx::__conditional_type<(sizeof(void*)
762  <= sizeof(unsigned long)),
763  unsigned long, unsigned long long>::__type _UIntPtrType;
764 
765  _UIntPtrType __ul;
766  __beg = _M_extract_int(__beg, __end, __io, __err, __ul);
767 
768  // Reset from hex formatted input.
769  __io.flags(__fmt);
770 
771  __v = reinterpret_cast<void*>(__ul);
772  return __beg;
773  }
774 
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>
778  void
780  _M_pad(_CharT __fill, streamsize __w, ios_base& __io,
781  _CharT* __new, const _CharT* __cs, int& __len) const
782  {
783  // [22.2.2.2.2] Stage 3.
784  // If necessary, pad.
785  __pad<_CharT, char_traits<_CharT> >::_S_pad(__io, __fill, __new,
786  __cs, __w, __len);
787  __len = static_cast<int>(__w);
788  }
789 
790 _GLIBCXX_END_NAMESPACE_LDBL
791 
792  template<typename _CharT, typename _ValueT>
793  int
794  __int_to_char(_CharT* __bufend, _ValueT __v, const _CharT* __lit,
795  ios_base::fmtflags __flags, bool __dec)
796  {
797  _CharT* __buf = __bufend;
798  if (__builtin_expect(__dec, true))
799  {
800  // Decimal.
801  do
802  {
803  *--__buf = __lit[(__v % 10) + __num_base::_S_odigits];
804  __v /= 10;
805  }
806  while (__v != 0);
807  }
808  else if ((__flags & ios_base::basefield) == ios_base::oct)
809  {
810  // Octal.
811  do
812  {
813  *--__buf = __lit[(__v & 0x7) + __num_base::_S_odigits];
814  __v >>= 3;
815  }
816  while (__v != 0);
817  }
818  else
819  {
820  // Hex.
821  const bool __uppercase = __flags & ios_base::uppercase;
822  const int __case_offset = __uppercase ? __num_base::_S_oudigits
823  : __num_base::_S_odigits;
824  do
825  {
826  *--__buf = __lit[(__v & 0xf) + __case_offset];
827  __v >>= 4;
828  }
829  while (__v != 0);
830  }
831  return __bufend - __buf;
832  }
833 
834 _GLIBCXX_BEGIN_NAMESPACE_LDBL
835 
836  template<typename _CharT, typename _OutIter>
837  void
839  _M_group_int(const char* __grouping, size_t __grouping_size, _CharT __sep,
840  ios_base&, _CharT* __new, _CharT* __cs, int& __len) const
841  {
842  _CharT* __p = std::__add_grouping(__new, __sep, __grouping,
843  __grouping_size, __cs, __cs + __len);
844  __len = __p - __new;
845  }
846 
847  template<typename _CharT, typename _OutIter>
848  template<typename _ValueT>
849  _OutIter
851  _M_insert_int(_OutIter __s, ios_base& __io, _CharT __fill,
852  _ValueT __v) const
853  {
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();
862 
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)
866  * __ilen));
867 
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;
878 
879  // Add grouping, if necessary.
880  if (__lc->_M_use_grouping)
881  {
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)
885  * (__len + 1)
886  * 2));
887  _M_group_int(__lc->_M_grouping, __lc->_M_grouping_size,
888  __lc->_M_thousands_sep, __io, __cs2 + 2, __cs, __len);
889  __cs = __cs2 + 2;
890  }
891 
892  // Complete Stage 1, prepend numeric base or sign.
893  if (__builtin_expect(__dec, true))
894  {
895  // Decimal.
896  if (__v >= 0)
897  {
898  if (bool(__flags & ios_base::showpos)
899  && __gnu_cxx::__numeric_traits<_ValueT>::__is_signed)
900  *--__cs = __lit[__num_base::_S_oplus], ++__len;
901  }
902  else
903  *--__cs = __lit[__num_base::_S_ominus], ++__len;
904  }
905  else if (bool(__flags & ios_base::showbase) && __v)
906  {
907  if (__basefield == ios_base::oct)
908  *--__cs = __lit[__num_base::_S_odigits], ++__len;
909  else
910  {
911  // 'x' or 'X'
912  const bool __uppercase = __flags & ios_base::uppercase;
913  *--__cs = __lit[__num_base::_S_ox + __uppercase];
914  // '0'
915  *--__cs = __lit[__num_base::_S_odigits];
916  __len += 2;
917  }
918  }
919 
920  // Pad.
921  const streamsize __w = __io.width();
922  if (__w > static_cast<streamsize>(__len))
923  {
924  _CharT* __cs3 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
925  * __w));
926  _M_pad(__fill, __w, __io, __cs3, __cs, __len);
927  __cs = __cs3;
928  }
929  __io.width(0);
930 
931  // [22.2.2.2.2] Stage 4.
932  // Write resulting, fully-formatted string to output iterator.
933  return std::__write(__s, __cs, __len);
934  }
935 
936  template<typename _CharT, typename _OutIter>
937  void
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
942  {
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,
948  __grouping_size,
949  __cs, __cs + __declen);
950 
951  // Tack on decimal part.
952  int __newlen = __p2 - __new;
953  if (__p)
954  {
955  char_traits<_CharT>::copy(__p2, __p, __len - __declen);
956  __newlen += __len - __declen;
957  }
958  __len = __newlen;
959  }
960 
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>
973  _OutIter
975  _M_insert_float(_OutIter __s, ios_base& __io, _CharT __fill, char __mod,
976  _ValueT __v) const
977  {
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);
982 
983  // Use default precision if out of range.
984  const streamsize __prec = __io.precision() < 0 ? 6 : __io.precision();
985 
986  const int __max_digits =
987  __gnu_cxx::__numeric_traits<_ValueT>::__digits10;
988 
989  // [22.2.2.2.2] Stage 1, numeric conversion to character.
990  int __len;
991  // Long enough for the max format spec.
992  char __fbuf[16];
993  __num_base::_S_format_float(__io, __fbuf, __mod);
994 
995 #if _GLIBCXX_USE_C99_STDIO
996  // Precision is always used except for hexfloat format.
997  const bool __use_prec =
999 
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));
1004  if (__use_prec)
1005  __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1006  __fbuf, __prec, __v);
1007  else
1008  __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1009  __fbuf, __v);
1010 
1011  // If the buffer was not large enough, try again with the correct size.
1012  if (__len >= __cs_size)
1013  {
1014  __cs_size = __len + 1;
1015  __cs = static_cast<char*>(__builtin_alloca(__cs_size));
1016  if (__use_prec)
1017  __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1018  __fbuf, __prec, __v);
1019  else
1020  __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
1021  __fbuf, __v);
1022  }
1023 #else
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;
1028 
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,
1039  __prec, __v);
1040 #endif
1041 
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);
1045 
1046  _CharT* __ws = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1047  * __len));
1048  __ctype.widen(__cs, __cs + __len, __ws);
1049 
1050  // Replace decimal point.
1051  _CharT* __wp = 0;
1052  const char* __p = char_traits<char>::find(__cs, __len, '.');
1053  if (__p)
1054  {
1055  __wp = __ws + (__p - __cs);
1056  *__wp = __lc->_M_decimal_point;
1057  }
1058 
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')))
1065  {
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)
1069  * __len * 2));
1070 
1071  streamsize __off = 0;
1072  if (__cs[0] == '-' || __cs[0] == '+')
1073  {
1074  __off = 1;
1075  __ws2[0] = __ws[0];
1076  __len -= 1;
1077  }
1078 
1079  _M_group_float(__lc->_M_grouping, __lc->_M_grouping_size,
1080  __lc->_M_thousands_sep, __wp, __ws2 + __off,
1081  __ws + __off, __len);
1082  __len += __off;
1083 
1084  __ws = __ws2;
1085  }
1086 
1087  // Pad.
1088  const streamsize __w = __io.width();
1089  if (__w > static_cast<streamsize>(__len))
1090  {
1091  _CharT* __ws3 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1092  * __w));
1093  _M_pad(__fill, __w, __io, __ws3, __ws, __len);
1094  __ws = __ws3;
1095  }
1096  __io.width(0);
1097 
1098  // [22.2.2.2.2] Stage 4.
1099  // Write resulting, fully-formatted string to output iterator.
1100  return std::__write(__s, __ws, __len);
1101  }
1102 
1103  template<typename _CharT, typename _OutIter>
1104  _OutIter
1106  do_put(iter_type __s, ios_base& __io, char_type __fill, bool __v) const
1107  {
1108  const ios_base::fmtflags __flags = __io.flags();
1109  if ((__flags & ios_base::boolalpha) == 0)
1110  {
1111  const long __l = __v;
1112  __s = _M_insert_int(__s, __io, __fill, __l);
1113  }
1114  else
1115  {
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);
1120 
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;
1125 
1126  const streamsize __w = __io.width();
1127  if (__w > static_cast<streamsize>(__len))
1128  {
1129  const streamsize __plen = __w - __len;
1130  _CharT* __ps
1131  = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
1132  * __plen));
1133 
1134  char_traits<_CharT>::assign(__ps, __plen, __fill);
1135  __io.width(0);
1136 
1137  if ((__flags & ios_base::adjustfield) == ios_base::left)
1138  {
1139  __s = std::__write(__s, __name, __len);
1140  __s = std::__write(__s, __ps, __plen);
1141  }
1142  else
1143  {
1144  __s = std::__write(__s, __ps, __plen);
1145  __s = std::__write(__s, __name, __len);
1146  }
1147  return __s;
1148  }
1149  __io.width(0);
1150  __s = std::__write(__s, __name, __len);
1151  }
1152  return __s;
1153  }
1154 
1155  template<typename _CharT, typename _OutIter>
1156  _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); }
1160 
1161 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
1162  template<typename _CharT, typename _OutIter>
1163  _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); }
1167 #endif
1168 
1169  template<typename _CharT, typename _OutIter>
1170  _OutIter
1173  long double __v) const
1174  { return _M_insert_float(__s, __io, __fill, 'L', __v); }
1175 
1176  template<typename _CharT, typename _OutIter>
1177  _OutIter
1180  const void* __v) const
1181  {
1182  const ios_base::fmtflags __flags = __io.flags();
1183  const ios_base::fmtflags __fmt = ~(ios_base::basefield
1185  __io.flags((__flags & __fmt) | (ios_base::hex | ios_base::showbase));
1186 
1187  typedef __gnu_cxx::__conditional_type<(sizeof(const void*)
1188  <= sizeof(unsigned long)),
1189  unsigned long, unsigned long long>::__type _UIntPtrType;
1190 
1191  __s = _M_insert_int(__s, __io, __fill,
1192  reinterpret_cast<_UIntPtrType>(__v));
1193  __io.flags(__flags);
1194  return __s;
1195  }
1196 
1197 _GLIBCXX_END_NAMESPACE_LDBL
1198 
1199  // Construct correctly padded string, as per 22.2.2.2.2
1200  // Assumes
1201  // __newlen > __oldlen
1202  // __news is allocated for __newlen size
1203 
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>
1207  void
1208  __pad<_CharT, _Traits>::_S_pad(ios_base& __io, _CharT __fill,
1209  _CharT* __news, const _CharT* __olds,
1210  streamsize __newlen, streamsize __oldlen)
1211  {
1212  const size_t __plen = static_cast<size_t>(__newlen - __oldlen);
1213  const ios_base::fmtflags __adjust = __io.flags() & ios_base::adjustfield;
1214 
1215  // Padding last.
1216  if (__adjust == ios_base::left)
1217  {
1218  _Traits::copy(__news, __olds, __oldlen);
1219  _Traits::assign(__news + __oldlen, __plen, __fill);
1220  return;
1221  }
1222 
1223  size_t __mod = 0;
1224  if (__adjust == ios_base::internal)
1225  {
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);
1231 
1232  if (__ctype.widen('-') == __olds[0]
1233  || __ctype.widen('+') == __olds[0])
1234  {
1235  __news[0] = __olds[0];
1236  __mod = 1;
1237  ++__news;
1238  }
1239  else if (__ctype.widen('0') == __olds[0]
1240  && __oldlen > 1
1241  && (__ctype.widen('x') == __olds[1]
1242  || __ctype.widen('X') == __olds[1]))
1243  {
1244  __news[0] = __olds[0];
1245  __news[1] = __olds[1];
1246  __mod = 2;
1247  __news += 2;
1248  }
1249  // else Padding first.
1250  }
1251  _Traits::assign(__news, __plen, __fill);
1252  _Traits::copy(__news + __plen, __olds + __mod, __oldlen - __mod);
1253  }
1254 
1255  template<typename _CharT>
1256  _CharT*
1257  __add_grouping(_CharT* __s, _CharT __sep,
1258  const char* __gbeg, size_t __gsize,
1259  const _CharT* __first, const _CharT* __last)
1260  {
1261  size_t __idx = 0;
1262  size_t __ctr = 0;
1263 
1264  while (__last - __first > __gbeg[__idx]
1265  && static_cast<signed char>(__gbeg[__idx]) > 0
1266  && __gbeg[__idx] != __gnu_cxx::__numeric_traits<char>::__max)
1267  {
1268  __last -= __gbeg[__idx];
1269  __idx < __gsize - 1 ? ++__idx : ++__ctr;
1270  }
1271 
1272  while (__first != __last)
1273  *__s++ = *__first++;
1274 
1275  while (__ctr--)
1276  {
1277  *__s++ = __sep;
1278  for (char __i = __gbeg[__idx]; __i > 0; --__i)
1279  *__s++ = *__first++;
1280  }
1281 
1282  while (__idx--)
1283  {
1284  *__s++ = __sep;
1285  for (char __i = __gbeg[__idx]; __i > 0; --__i)
1286  *__s++ = *__first++;
1287  }
1288 
1289  return __s;
1290  }
1291 
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>;
1300 
1301  extern template
1302  const ctype<char>&
1303  use_facet<ctype<char> >(const locale&);
1304 
1305  extern template
1306  const numpunct<char>&
1307  use_facet<numpunct<char> >(const locale&);
1308 
1309  extern template
1310  const num_put<char>&
1311  use_facet<num_put<char> >(const locale&);
1312 
1313  extern template
1314  const num_get<char>&
1315  use_facet<num_get<char> >(const locale&);
1316 
1317  extern template
1318  bool
1319  has_facet<ctype<char> >(const locale&);
1320 
1321  extern template
1322  bool
1323  has_facet<numpunct<char> >(const locale&);
1324 
1325  extern template
1326  bool
1327  has_facet<num_put<char> >(const locale&);
1328 
1329  extern template
1330  bool
1331  has_facet<num_get<char> >(const locale&);
1332 
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>;
1339 
1340  extern template
1341  const ctype<wchar_t>&
1342  use_facet<ctype<wchar_t> >(const locale&);
1343 
1344  extern template
1345  const numpunct<wchar_t>&
1346  use_facet<numpunct<wchar_t> >(const locale&);
1347 
1348  extern template
1349  const num_put<wchar_t>&
1350  use_facet<num_put<wchar_t> >(const locale&);
1351 
1352  extern template
1353  const num_get<wchar_t>&
1354  use_facet<num_get<wchar_t> >(const locale&);
1355 
1356  extern template
1357  bool
1358  has_facet<ctype<wchar_t> >(const locale&);
1359 
1360  extern template
1361  bool
1362  has_facet<numpunct<wchar_t> >(const locale&);
1363 
1364  extern template
1365  bool
1366  has_facet<num_put<wchar_t> >(const locale&);
1367 
1368  extern template
1369  bool
1370  has_facet<num_get<wchar_t> >(const locale&);
1371 #endif
1372 #endif
1373 
1374 _GLIBCXX_END_NAMESPACE_VERSION
1375 } // namespace
1376 
1377 #endif
virtual iter_type do_put(iter_type __s, ios_base &__io, char_type __fill, bool __v) const
Numeric formatting.
static const iostate failbit
Indicates that an input operation failed to read the expected characters, or that an output operation...
Definition: ios_base.h:410
_Ios_Iostate iostate
This is a bitmask type.
Definition: ios_base.h:398
static const iostate eofbit
Indicates that an input operation reached the end of an input sequence.
Definition: ios_base.h:405
streamsize width() const
Flags access.
Definition: ios_base.h:712
static const fmtflags boolalpha
Insert/extract bool in alphabetic rather than numeric format.
Definition: ios_base.h:326
ISO C++ entities toplevel namespace is std.
_Ios_Fmtflags fmtflags
This is a bitmask type.
Definition: ios_base.h:323
virtual iter_type do_get(iter_type, iter_type, ios_base &, ios_base::iostate &, bool &) const
Numeric parsing.
const locale & _M_getloc() const
Locale access.
Definition: ios_base.h:774
static const fmtflags showbase
Generates a prefix indicating the numeric base of generated integer output.
Definition: ios_base.h:358
static locale::id id
Numpunct facet id.
streamsize precision() const
Flags access.
Definition: ios_base.h:689
The ctype<wchar_t> specialization.This class defines classification and conversion functions for the ...
static const iostate goodbit
Indicates all is well.
Definition: ios_base.h:413
void reserve(size_type __res_arg=0)
Attempt to preallocate enough memory for specified number of characters.
Primary class template num_get.This facet encapsulates the code to parse and return a number from a s...
The ctype<char> specialization.This class defines classification and conversion functions for the cha...
static const fmtflags uppercase
Replaces certain lowercase letters with their uppercase equivalents in generated output.
Definition: ios_base.h:375
static const fmtflags showpos
Generates a + sign in non-negative generated numeric output.
Definition: ios_base.h:365
static const fmtflags floatfield
A mask of scientific|fixed. Useful for the 2-arg form of setf.
Definition: ios_base.h:384
22.2.1.4 Class ctype_byname specializations.
fmtflags flags() const
Access to format flags.
Definition: ios_base.h:619
_CharT char_type
Public typedefs.
static const fmtflags left
Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.)
Definition: ios_base.h:344
char_type widen(char __c) const
Widen char to char_type.
static const fmtflags internal
Adds fill characters at a designated internal point in certain generated output, or identical to righ...
Definition: ios_base.h:340
static const fmtflags adjustfield
A mask of left|right|internal. Useful for the 2-arg form of setf.
Definition: ios_base.h:378
class numpunct_byname [22.2.3.2].
The base of the I/O class hierarchy.This class defines everything that can be defined about I/O that ...
Definition: ios_base.h:228
ptrdiff_t streamsize
Integral type for I/O operation counts and buffer sizes.
Definition: postypes.h:98
_OutIter iter_type
Public typedefs.
class ctype_byname [22.2.1.2].
static const fmtflags basefield
A mask of dec|oct|hex. Useful for the 2-arg form of setf.
Definition: ios_base.h:381
static const fmtflags hex
Converts integer input or generates integer output in hexadecimal base.
Definition: ios_base.h:335
const _CharT * c_str() const noexcept
Return const pointer to null-terminated contents.
Container class for localization functionality.The locale class is first a class wrapper for C librar...
Basis for explicit traits specializations.
Definition: char_traits.h:269
Primary class template num_put.This facet encapsulates the code to convert a number to a string...
Primary class template numpunct.This facet stores several pieces of information related to printing a...
_InIter iter_type
Public typedefs.
static const fmtflags fixed
Generate floating-point output in fixed-point notation.
Definition: ios_base.h:332
_CharT char_type
Public typedefs.
static const fmtflags oct
Converts integer input or generates integer output in octal base.
Definition: ios_base.h:347
Primary class template ctype facet.This template class defines classification and conversion function...