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      1 // -*- C++ -*-
      2 //===-------------------------- locale ------------------------------------===//
      3 //
      4 //                     The LLVM Compiler Infrastructure
      5 //
      6 // This file is dual licensed under the MIT and the University of Illinois Open
      7 // Source Licenses. See LICENSE.TXT for details.
      8 //
      9 //===----------------------------------------------------------------------===//
     10 
     11 #ifndef _LIBCPP_LOCALE
     12 #define _LIBCPP_LOCALE
     13 
     14 /*
     15     locale synopsis
     16 
     17 namespace std
     18 {
     19 
     20 class locale
     21 {
     22 public:
     23     // types:
     24     class facet;
     25     class id;
     26 
     27     typedef int category;
     28     static const category // values assigned here are for exposition only
     29         none     = 0x000,
     30         collate  = 0x010,
     31         ctype    = 0x020,
     32         monetary = 0x040,
     33         numeric  = 0x080,
     34         time     = 0x100,
     35         messages = 0x200,
     36         all = collate | ctype | monetary | numeric | time | messages;
     37 
     38     // construct/copy/destroy:
     39     locale() noexcept;
     40     locale(const locale& other) noexcept;
     41     explicit locale(const char* std_name);
     42     explicit locale(const string& std_name);
     43     locale(const locale& other, const char* std_name, category);
     44     locale(const locale& other, const string& std_name, category);
     45     template <class Facet> locale(const locale& other, Facet* f);
     46     locale(const locale& other, const locale& one, category);
     47 
     48     ~locale(); // not virtual
     49 
     50     const locale& operator=(const locale& other) noexcept;
     51 
     52     template <class Facet> locale combine(const locale& other) const;
     53 
     54     // locale operations:
     55     basic_string<char> name() const;
     56     bool operator==(const locale& other) const;
     57     bool operator!=(const locale& other) const;
     58     template <class charT, class Traits, class Allocator>
     59       bool operator()(const basic_string<charT,Traits,Allocator>& s1,
     60                       const basic_string<charT,Traits,Allocator>& s2) const;
     61 
     62     // global locale objects:
     63     static locale global(const locale&);
     64     static const locale& classic();
     65 };
     66 
     67 template <class Facet> const Facet& use_facet(const locale&);
     68 template <class Facet> bool has_facet(const locale&) noexcept;
     69 
     70 // 22.3.3, convenience interfaces:
     71 template <class charT> bool isspace (charT c, const locale& loc);
     72 template <class charT> bool isprint (charT c, const locale& loc);
     73 template <class charT> bool iscntrl (charT c, const locale& loc);
     74 template <class charT> bool isupper (charT c, const locale& loc);
     75 template <class charT> bool islower (charT c, const locale& loc);
     76 template <class charT> bool isalpha (charT c, const locale& loc);
     77 template <class charT> bool isdigit (charT c, const locale& loc);
     78 template <class charT> bool ispunct (charT c, const locale& loc);
     79 template <class charT> bool isxdigit(charT c, const locale& loc);
     80 template <class charT> bool isalnum (charT c, const locale& loc);
     81 template <class charT> bool isgraph (charT c, const locale& loc);
     82 template <class charT> charT toupper(charT c, const locale& loc);
     83 template <class charT> charT tolower(charT c, const locale& loc);
     84 
     85 template<class Codecvt, class Elem = wchar_t,
     86          class Wide_alloc = allocator<Elem>,
     87          class Byte_alloc = allocator<char>>
     88 class wstring_convert
     89 {
     90 public:
     91     typedef basic_string<char, char_traits<char>, Byte_alloc> byte_string;
     92     typedef basic_string<Elem, char_traits<Elem>, Wide_alloc> wide_string;
     93     typedef typename Codecvt::state_type                      state_type;
     94     typedef typename wide_string::traits_type::int_type       int_type;
     95 
     96     explicit wstring_convert(Codecvt* pcvt = new Codecvt);          // explicit in C++14
     97     wstring_convert(Codecvt* pcvt, state_type state);
     98     explicit wstring_convert(const byte_string& byte_err,           // explicit in C++14
     99                     const wide_string& wide_err = wide_string());
    100     wstring_convert(const wstring_convert&) = delete;               // C++14
    101     wstring_convert & operator=(const wstring_convert &) = delete;  // C++14
    102     ~wstring_convert();
    103 
    104     wide_string from_bytes(char byte);
    105     wide_string from_bytes(const char* ptr);
    106     wide_string from_bytes(const byte_string& str);
    107     wide_string from_bytes(const char* first, const char* last);
    108 
    109     byte_string to_bytes(Elem wchar);
    110     byte_string to_bytes(const Elem* wptr);
    111     byte_string to_bytes(const wide_string& wstr);
    112     byte_string to_bytes(const Elem* first, const Elem* last);
    113 
    114     size_t converted() const; // noexcept in C++14
    115     state_type state() const;
    116 };
    117 
    118 template <class Codecvt, class Elem = wchar_t, class Tr = char_traits<Elem>>
    119 class wbuffer_convert
    120     : public basic_streambuf<Elem, Tr>
    121 {
    122 public:
    123     typedef typename Tr::state_type state_type;
    124 
    125     explicit wbuffer_convert(streambuf* bytebuf = 0, Codecvt* pcvt = new Codecvt,
    126                     state_type state = state_type());       // explicit in C++14
    127     wbuffer_convert(const wbuffer_convert&) = delete;               // C++14
    128     wbuffer_convert & operator=(const wbuffer_convert &) = delete;  // C++14
    129     ~wbuffer_convert();                                             // C++14
    130     
    131     streambuf* rdbuf() const;
    132     streambuf* rdbuf(streambuf* bytebuf);
    133 
    134     state_type state() const;
    135 };
    136 
    137 // 22.4.1 and 22.4.1.3, ctype:
    138 class ctype_base;
    139 template <class charT> class ctype;
    140 template <> class ctype<char>; // specialization
    141 template <class charT> class ctype_byname;
    142 template <> class ctype_byname<char>; // specialization
    143 
    144 class codecvt_base;
    145 template <class internT, class externT, class stateT> class codecvt;
    146 template <class internT, class externT, class stateT> class codecvt_byname;
    147 
    148 // 22.4.2 and 22.4.3, numeric:
    149 template <class charT, class InputIterator> class num_get;
    150 template <class charT, class OutputIterator> class num_put;
    151 template <class charT> class numpunct;
    152 template <class charT> class numpunct_byname;
    153 
    154 // 22.4.4, col lation:
    155 template <class charT> class collate;
    156 template <class charT> class collate_byname;
    157 
    158 // 22.4.5, date and time:
    159 class time_base;
    160 template <class charT, class InputIterator> class time_get;
    161 template <class charT, class InputIterator> class time_get_byname;
    162 template <class charT, class OutputIterator> class time_put;
    163 template <class charT, class OutputIterator> class time_put_byname;
    164 
    165 // 22.4.6, money:
    166 class money_base;
    167 template <class charT, class InputIterator> class money_get;
    168 template <class charT, class OutputIterator> class money_put;
    169 template <class charT, bool Intl> class moneypunct;
    170 template <class charT, bool Intl> class moneypunct_byname;
    171 
    172 // 22.4.7, message retrieval:
    173 class messages_base;
    174 template <class charT> class messages;
    175 template <class charT> class messages_byname;
    176 
    177 }  // std
    178 
    179 */
    180 
    181 #include <__config>
    182 #include <__locale>
    183 #include <algorithm>
    184 #include <memory>
    185 #include <ios>
    186 #include <streambuf>
    187 #include <iterator>
    188 #include <limits>
    189 #ifndef __APPLE__
    190 #include <cstdarg>
    191 #endif
    192 #include <cstdlib>
    193 #include <ctime>
    194 #if defined(_LIBCPP_MSVCRT) || defined(__MINGW32__)
    195 #include <support/win32/locale_win32.h>
    196 #else // _LIBCPP_MSVCRT
    197 #include <nl_types.h>
    198 #endif  // !_LIBCPP_MSVCRT
    199 
    200 #ifdef __APPLE__
    201 #include <Availability.h>
    202 #endif
    203 
    204 #include <__undef_min_max>
    205 
    206 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
    207 #pragma GCC system_header
    208 #endif
    209 
    210 _LIBCPP_BEGIN_NAMESPACE_STD
    211 
    212 #if defined(__APPLE__) || defined(__FreeBSD__)
    213 #  define _LIBCPP_GET_C_LOCALE 0
    214 #elif defined(__NetBSD__)
    215 #  define _LIBCPP_GET_C_LOCALE LC_C_LOCALE
    216 #else
    217 #  define _LIBCPP_GET_C_LOCALE __cloc()
    218    // Get the C locale object
    219    _LIBCPP_FUNC_VIS locale_t __cloc();
    220 #define __cloc_defined
    221 #endif
    222 
    223 typedef _VSTD::remove_pointer<locale_t>::type __locale_struct;
    224 typedef _VSTD::unique_ptr<__locale_struct, decltype(&freelocale)> __locale_unique_ptr;
    225 #ifndef _LIBCPP_LOCALE__L_EXTENSIONS
    226 typedef _VSTD::unique_ptr<__locale_struct, decltype(&uselocale)> __locale_raii;
    227 #endif
    228 
    229 // OSX has nice foo_l() functions that let you turn off use of the global
    230 // locale.  Linux, not so much.  The following functions avoid the locale when
    231 // that's possible and otherwise do the wrong thing.  FIXME.
    232 #if defined(__linux__) || defined(__EMSCRIPTEN__) || defined(_AIX)
    233 
    234 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    235 decltype(MB_CUR_MAX_L(_VSTD::declval<locale_t>()))
    236 inline _LIBCPP_INLINE_VISIBILITY
    237 __mb_cur_max_l(locale_t __l)
    238 {
    239   return MB_CUR_MAX_L(__l);
    240 }
    241 #else  // _LIBCPP_LOCALE__L_EXTENSIONS
    242 inline _LIBCPP_ALWAYS_INLINE
    243 decltype(MB_CUR_MAX) __mb_cur_max_l(locale_t __l)
    244 {
    245   __locale_raii __current(uselocale(__l), uselocale);
    246   return MB_CUR_MAX;
    247 }
    248 #endif // _LIBCPP_LOCALE__L_EXTENSIONS
    249 
    250 inline _LIBCPP_ALWAYS_INLINE
    251 wint_t __btowc_l(int __c, locale_t __l)
    252 {
    253 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    254   return btowc_l(__c, __l);
    255 #else
    256   __locale_raii __current(uselocale(__l), uselocale);
    257   return btowc(__c);
    258 #endif
    259 }
    260 
    261 inline _LIBCPP_ALWAYS_INLINE
    262 int __wctob_l(wint_t __c, locale_t __l)
    263 {
    264 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    265   return wctob_l(__c, __l);
    266 #else
    267   __locale_raii __current(uselocale(__l), uselocale);
    268   return wctob(__c);
    269 #endif
    270 }
    271 
    272 inline _LIBCPP_ALWAYS_INLINE
    273 size_t __wcsnrtombs_l(char *__dest, const wchar_t **__src, size_t __nwc,
    274                       size_t __len, mbstate_t *__ps, locale_t __l)
    275 {
    276 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    277   return wcsnrtombs_l(__dest, __src, __nwc, __len, __ps, __l);
    278 #else
    279   __locale_raii __current(uselocale(__l), uselocale);
    280   return wcsnrtombs(__dest, __src, __nwc, __len, __ps);
    281 #endif
    282 }
    283 
    284 inline _LIBCPP_ALWAYS_INLINE
    285 size_t __wcrtomb_l(char *__s, wchar_t __wc, mbstate_t *__ps, locale_t __l)
    286 {
    287 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    288   return wcrtomb_l(__s, __wc, __ps, __l);
    289 #else
    290   __locale_raii __current(uselocale(__l), uselocale);
    291   return wcrtomb(__s, __wc, __ps);
    292 #endif
    293 }
    294 
    295 inline _LIBCPP_ALWAYS_INLINE
    296 size_t __mbsnrtowcs_l(wchar_t * __dest, const char **__src, size_t __nms,
    297                       size_t __len, mbstate_t *__ps, locale_t __l)
    298 {
    299 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    300   return mbsnrtowcs_l(__dest, __src, __nms, __len, __ps, __l);
    301 #else
    302   __locale_raii __current(uselocale(__l), uselocale);
    303   return mbsnrtowcs(__dest, __src, __nms, __len, __ps);
    304 #endif
    305 }
    306 
    307 inline _LIBCPP_ALWAYS_INLINE
    308 size_t __mbrtowc_l(wchar_t *__pwc, const char *__s, size_t __n,
    309                    mbstate_t *__ps, locale_t __l)
    310 {
    311 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    312   return mbrtowc_l(__pwc, __s, __n, __ps, __l);
    313 #else
    314   __locale_raii __current(uselocale(__l), uselocale);
    315   return mbrtowc(__pwc, __s, __n, __ps);
    316 #endif
    317 }
    318 
    319 inline _LIBCPP_ALWAYS_INLINE
    320 int __mbtowc_l(wchar_t *__pwc, const char *__pmb, size_t __max, locale_t __l)
    321 {
    322 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    323   return mbtowc_l(__pwc, __pmb, __max, __l);
    324 #else
    325   __locale_raii __current(uselocale(__l), uselocale);
    326   return mbtowc(__pwc, __pmb, __max);
    327 #endif
    328 }
    329 
    330 inline _LIBCPP_ALWAYS_INLINE
    331 size_t __mbrlen_l(const char *__s, size_t __n, mbstate_t *__ps, locale_t __l)
    332 {
    333 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    334   return mbrlen_l(__s, __n, __ps, __l);
    335 #else
    336   __locale_raii __current(uselocale(__l), uselocale);
    337   return mbrlen(__s, __n, __ps);
    338 #endif
    339 }
    340 
    341 inline _LIBCPP_ALWAYS_INLINE
    342 lconv *__localeconv_l(locale_t __l)
    343 {
    344 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    345   return localeconv_l(__l);
    346 #else
    347   __locale_raii __current(uselocale(__l), uselocale);
    348   return localeconv();
    349 #endif
    350 }
    351 
    352 inline _LIBCPP_ALWAYS_INLINE
    353 size_t __mbsrtowcs_l(wchar_t *__dest, const char **__src, size_t __len,
    354                      mbstate_t *__ps, locale_t __l)
    355 {
    356 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    357   return mbsrtowcs_l(__dest, __src, __len, __ps, __l);
    358 #else
    359   __locale_raii __current(uselocale(__l), uselocale);
    360   return mbsrtowcs(__dest, __src, __len, __ps);
    361 #endif
    362 }
    363 
    364 inline
    365 int __snprintf_l(char *__s, size_t __n, locale_t __l, const char *__format, ...) {
    366   va_list __va;
    367   va_start(__va, __format);
    368 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    369   int __res = vsnprintf_l(__s, __n, __l, __format, __va);
    370 #else
    371   __locale_raii __current(uselocale(__l), uselocale);
    372   int __res = vsnprintf(__s, __n, __format, __va);
    373 #endif
    374   va_end(__va);
    375   return __res;
    376 }
    377 
    378 inline
    379 int __asprintf_l(char **__s, locale_t __l, const char *__format, ...) {
    380   va_list __va;
    381   va_start(__va, __format);
    382 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    383   int __res = vasprintf_l(__s, __l, __format, __va);
    384 #else
    385   __locale_raii __current(uselocale(__l), uselocale);
    386   int __res = vasprintf(__s, __format, __va);
    387 #endif
    388   va_end(__va);
    389   return __res;
    390 }
    391 
    392 inline
    393 int __sscanf_l(const char *__s, locale_t __l, const char *__format, ...) {
    394   va_list __va;
    395   va_start(__va, __format);
    396 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
    397   int __res = vsscanf_l(__s, __l, __format, __va);
    398 #else
    399   __locale_raii __current(uselocale(__l), uselocale);
    400   int __res = vsscanf(__s, __format, __va);
    401 #endif
    402   va_end(__va);
    403   return __res;
    404 }
    405 
    406 #endif  // __linux__
    407 
    408 // __scan_keyword
    409 // Scans [__b, __e) until a match is found in the basic_strings range
    410 //  [__kb, __ke) or until it can be shown that there is no match in [__kb, __ke).
    411 //  __b will be incremented (visibly), consuming CharT until a match is found
    412 //  or proved to not exist.  A keyword may be "", in which will match anything.
    413 //  If one keyword is a prefix of another, and the next CharT in the input
    414 //  might match another keyword, the algorithm will attempt to find the longest
    415 //  matching keyword.  If the longer matching keyword ends up not matching, then
    416 //  no keyword match is found.  If no keyword match is found, __ke is returned
    417 //  and failbit is set in __err.
    418 //  Else an iterator pointing to the matching keyword is found.  If more than
    419 //  one keyword matches, an iterator to the first matching keyword is returned.
    420 //  If on exit __b == __e, eofbit is set in __err.  If __case_sensitive is false,
    421 //  __ct is used to force to lower case before comparing characters.
    422 //  Examples:
    423 //  Keywords:  "a", "abb"
    424 //  If the input is "a", the first keyword matches and eofbit is set.
    425 //  If the input is "abc", no match is found and "ab" are consumed.
    426 template <class _InputIterator, class _ForwardIterator, class _Ctype>
    427 _LIBCPP_HIDDEN
    428 _ForwardIterator
    429 __scan_keyword(_InputIterator& __b, _InputIterator __e,
    430                _ForwardIterator __kb, _ForwardIterator __ke,
    431                const _Ctype& __ct, ios_base::iostate& __err,
    432                bool __case_sensitive = true)
    433 {
    434     typedef typename iterator_traits<_InputIterator>::value_type _CharT;
    435     size_t __nkw = static_cast<size_t>(_VSTD::distance(__kb, __ke));
    436     const unsigned char __doesnt_match = '\0';
    437     const unsigned char __might_match = '\1';
    438     const unsigned char __does_match = '\2';
    439     unsigned char __statbuf[100];
    440     unsigned char* __status = __statbuf;
    441     unique_ptr<unsigned char, void(*)(void*)> __stat_hold(0, free);
    442     if (__nkw > sizeof(__statbuf))
    443     {
    444         __status = (unsigned char*)malloc(__nkw);
    445         if (__status == 0)
    446             __throw_bad_alloc();
    447         __stat_hold.reset(__status);
    448     }
    449     size_t __n_might_match = __nkw;  // At this point, any keyword might match
    450     size_t __n_does_match = 0;       // but none of them definitely do
    451     // Initialize all statuses to __might_match, except for "" keywords are __does_match
    452     unsigned char* __st = __status;
    453     for (_ForwardIterator __ky = __kb; __ky != __ke; ++__ky, ++__st)
    454     {
    455         if (!__ky->empty())
    456             *__st = __might_match;
    457         else
    458         {
    459             *__st = __does_match;
    460             --__n_might_match;
    461             ++__n_does_match;
    462         }
    463     }
    464     // While there might be a match, test keywords against the next CharT
    465     for (size_t __indx = 0; __b != __e && __n_might_match > 0; ++__indx)
    466     {
    467         // Peek at the next CharT but don't consume it
    468         _CharT __c = *__b;
    469         if (!__case_sensitive)
    470             __c = __ct.toupper(__c);
    471         bool __consume = false;
    472         // For each keyword which might match, see if the __indx character is __c
    473         // If a match if found, consume __c
    474         // If a match is found, and that is the last character in the keyword,
    475         //    then that keyword matches.
    476         // If the keyword doesn't match this character, then change the keyword
    477         //    to doesn't match
    478         __st = __status;
    479         for (_ForwardIterator __ky = __kb; __ky != __ke; ++__ky, ++__st)
    480         {
    481             if (*__st == __might_match)
    482             {
    483                 _CharT __kc = (*__ky)[__indx];
    484                 if (!__case_sensitive)
    485                     __kc = __ct.toupper(__kc);
    486                 if (__c == __kc)
    487                 {
    488                     __consume = true;
    489                     if (__ky->size() == __indx+1)
    490                     {
    491                         *__st = __does_match;
    492                         --__n_might_match;
    493                         ++__n_does_match;
    494                     }
    495                 }
    496                 else
    497                 {
    498                     *__st = __doesnt_match;
    499                     --__n_might_match;
    500                 }
    501             }
    502         }
    503         // consume if we matched a character
    504         if (__consume)
    505         {
    506             ++__b;
    507             // If we consumed a character and there might be a matched keyword that
    508             //   was marked matched on a previous iteration, then such keywords
    509             //   which are now marked as not matching.
    510             if (__n_might_match + __n_does_match > 1)
    511             {
    512                 __st = __status;
    513                 for (_ForwardIterator __ky = __kb; __ky != __ke; ++__ky, ++__st)
    514                 {
    515                     if (*__st == __does_match && __ky->size() != __indx+1)
    516                     {
    517                         *__st = __doesnt_match;
    518                         --__n_does_match;
    519                     }
    520                 }
    521             }
    522         }
    523     }
    524     // We've exited the loop because we hit eof and/or we have no more "might matches".
    525     if (__b == __e)
    526         __err |= ios_base::eofbit;
    527     // Return the first matching result
    528     for (__st = __status; __kb != __ke; ++__kb, ++__st)
    529         if (*__st == __does_match)
    530             break;
    531     if (__kb == __ke)
    532         __err |= ios_base::failbit;
    533     return __kb;
    534 }
    535 
    536 struct _LIBCPP_TYPE_VIS __num_get_base
    537 {
    538     static const int __num_get_buf_sz = 40;
    539 
    540     static int __get_base(ios_base&);
    541     static const char __src[33];
    542 };
    543 
    544 _LIBCPP_FUNC_VIS
    545 void __check_grouping(const string& __grouping, unsigned* __g, unsigned* __g_end,
    546                       ios_base::iostate& __err);
    547 
    548 template <class _CharT>
    549 struct __num_get
    550     : protected __num_get_base
    551 {
    552     static string __stage2_int_prep(ios_base& __iob, _CharT* __atoms, _CharT& __thousands_sep);
    553     static string __stage2_float_prep(ios_base& __iob, _CharT* __atoms, _CharT& __decimal_point,
    554                                       _CharT& __thousands_sep);
    555     static int __stage2_int_loop(_CharT __ct, int __base, char* __a, char*& __a_end,
    556                   unsigned& __dc, _CharT __thousands_sep, const string& __grouping,
    557                   unsigned* __g, unsigned*& __g_end, _CharT* __atoms);
    558     static int __stage2_float_loop(_CharT __ct, bool& __in_units, char& __exp,
    559                                    char* __a, char*& __a_end,
    560                                    _CharT __decimal_point, _CharT __thousands_sep,
    561                                    const string& __grouping, unsigned* __g,
    562                                    unsigned*& __g_end, unsigned& __dc, _CharT* __atoms);
    563 };
    564 
    565 template <class _CharT>
    566 string
    567 __num_get<_CharT>::__stage2_int_prep(ios_base& __iob, _CharT* __atoms, _CharT& __thousands_sep)
    568 {
    569     locale __loc = __iob.getloc();
    570     use_facet<ctype<_CharT> >(__loc).widen(__src, __src + 26, __atoms);
    571     const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
    572     __thousands_sep = __np.thousands_sep();
    573     return __np.grouping();
    574 }
    575 
    576 template <class _CharT>
    577 string
    578 __num_get<_CharT>::__stage2_float_prep(ios_base& __iob, _CharT* __atoms, _CharT& __decimal_point,
    579                     _CharT& __thousands_sep)
    580 {
    581     locale __loc = __iob.getloc();
    582     use_facet<ctype<_CharT> >(__loc).widen(__src, __src + 32, __atoms);
    583     const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
    584     __decimal_point = __np.decimal_point();
    585     __thousands_sep = __np.thousands_sep();
    586     return __np.grouping();
    587 }
    588 
    589 template <class _CharT>
    590 int
    591 __num_get<_CharT>::__stage2_int_loop(_CharT __ct, int __base, char* __a, char*& __a_end,
    592                   unsigned& __dc, _CharT __thousands_sep, const string& __grouping,
    593                   unsigned* __g, unsigned*& __g_end, _CharT* __atoms)
    594 {
    595     if (__a_end == __a && (__ct == __atoms[24] || __ct == __atoms[25]))
    596     {
    597         *__a_end++ = __ct == __atoms[24] ? '+' : '-';
    598         __dc = 0;
    599         return 0;
    600     }
    601     if (__grouping.size() != 0 && __ct == __thousands_sep)
    602     {
    603         if (__g_end-__g < __num_get_buf_sz)
    604         {
    605             *__g_end++ = __dc;
    606             __dc = 0;
    607         }
    608         return 0;
    609     }
    610     ptrdiff_t __f = find(__atoms, __atoms + 26, __ct) - __atoms;
    611     if (__f >= 24)
    612         return -1;
    613     switch (__base)
    614     {
    615     case 8:
    616     case 10:
    617         if (__f >= __base)
    618             return -1;
    619         break;
    620     case 16:
    621         if (__f < 22)
    622             break;
    623         if (__a_end != __a && __a_end - __a <= 2 && __a_end[-1] == '0')
    624         {
    625             __dc = 0;
    626             *__a_end++ = __src[__f];
    627             return 0;
    628         }
    629         return -1;
    630     }
    631     *__a_end++ = __src[__f];
    632     ++__dc;
    633     return 0;
    634 }
    635 
    636 template <class _CharT>
    637 int
    638 __num_get<_CharT>::__stage2_float_loop(_CharT __ct, bool& __in_units, char& __exp, char* __a, char*& __a_end,
    639                     _CharT __decimal_point, _CharT __thousands_sep, const string& __grouping,
    640                     unsigned* __g, unsigned*& __g_end, unsigned& __dc, _CharT* __atoms)
    641 {
    642     if (__ct == __decimal_point)
    643     {
    644         if (!__in_units)
    645             return -1;
    646         __in_units = false;
    647         *__a_end++ = '.';
    648         if (__grouping.size() != 0 && __g_end-__g < __num_get_buf_sz)
    649             *__g_end++ = __dc;
    650         return 0;
    651     }
    652     if (__ct == __thousands_sep && __grouping.size() != 0)
    653     {
    654         if (!__in_units)
    655             return -1;
    656         if (__g_end-__g < __num_get_buf_sz)
    657         {
    658             *__g_end++ = __dc;
    659             __dc = 0;
    660         }
    661         return 0;
    662     }
    663     ptrdiff_t __f = find(__atoms, __atoms + 32, __ct) - __atoms;
    664     if (__f >= 32)
    665         return -1;
    666     char __x = __src[__f];
    667     if (__x == '-' || __x == '+')
    668     {
    669         if (__a_end == __a || (__a_end[-1] & 0x5F) == (__exp & 0x7F))
    670         {
    671             *__a_end++ = __x;
    672             return 0;
    673         }
    674         return -1;
    675     }
    676     if (__x == 'x' || __x == 'X')
    677         __exp = 'P';
    678     else if ((__x & 0x5F) == __exp)
    679     {
    680         __exp |= 0x80;
    681         if (__in_units)
    682         {
    683             __in_units = false;
    684             if (__grouping.size() != 0 && __g_end-__g < __num_get_buf_sz)
    685                 *__g_end++ = __dc;
    686         }
    687     }
    688     *__a_end++ = __x;
    689     if (__f >= 22)
    690         return 0;
    691     ++__dc;
    692     return 0;
    693 }
    694 
    695 _LIBCPP_EXTERN_TEMPLATE2(struct _LIBCPP_TYPE_VIS __num_get<char>)
    696 _LIBCPP_EXTERN_TEMPLATE2(struct _LIBCPP_TYPE_VIS __num_get<wchar_t>)
    697 
    698 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
    699 class _LIBCPP_TYPE_VIS_ONLY num_get
    700     : public locale::facet,
    701       private __num_get<_CharT>
    702 {
    703 public:
    704     typedef _CharT char_type;
    705     typedef _InputIterator iter_type;
    706 
    707     _LIBCPP_ALWAYS_INLINE
    708     explicit num_get(size_t __refs = 0)
    709         : locale::facet(__refs) {}
    710 
    711     _LIBCPP_ALWAYS_INLINE
    712     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    713                   ios_base::iostate& __err, bool& __v) const
    714     {
    715         return do_get(__b, __e, __iob, __err, __v);
    716     }
    717 
    718     _LIBCPP_ALWAYS_INLINE
    719     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    720                   ios_base::iostate& __err, long& __v) const
    721     {
    722         return do_get(__b, __e, __iob, __err, __v);
    723     }
    724 
    725     _LIBCPP_ALWAYS_INLINE
    726     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    727                   ios_base::iostate& __err, long long& __v) const
    728     {
    729         return do_get(__b, __e, __iob, __err, __v);
    730     }
    731 
    732     _LIBCPP_ALWAYS_INLINE
    733     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    734                   ios_base::iostate& __err, unsigned short& __v) const
    735     {
    736         return do_get(__b, __e, __iob, __err, __v);
    737     }
    738 
    739     _LIBCPP_ALWAYS_INLINE
    740     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    741                   ios_base::iostate& __err, unsigned int& __v) const
    742     {
    743         return do_get(__b, __e, __iob, __err, __v);
    744     }
    745 
    746     _LIBCPP_ALWAYS_INLINE
    747     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    748                   ios_base::iostate& __err, unsigned long& __v) const
    749     {
    750         return do_get(__b, __e, __iob, __err, __v);
    751     }
    752 
    753     _LIBCPP_ALWAYS_INLINE
    754     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    755                   ios_base::iostate& __err, unsigned long long& __v) const
    756     {
    757         return do_get(__b, __e, __iob, __err, __v);
    758     }
    759 
    760     _LIBCPP_ALWAYS_INLINE
    761     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    762                   ios_base::iostate& __err, float& __v) const
    763     {
    764         return do_get(__b, __e, __iob, __err, __v);
    765     }
    766 
    767     _LIBCPP_ALWAYS_INLINE
    768     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    769                   ios_base::iostate& __err, double& __v) const
    770     {
    771         return do_get(__b, __e, __iob, __err, __v);
    772     }
    773 
    774     _LIBCPP_ALWAYS_INLINE
    775     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    776                   ios_base::iostate& __err, long double& __v) const
    777     {
    778         return do_get(__b, __e, __iob, __err, __v);
    779     }
    780 
    781     _LIBCPP_ALWAYS_INLINE
    782     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
    783                   ios_base::iostate& __err, void*& __v) const
    784     {
    785         return do_get(__b, __e, __iob, __err, __v);
    786     }
    787 
    788     static locale::id id;
    789 
    790 protected:
    791     _LIBCPP_ALWAYS_INLINE
    792     ~num_get() {}
    793 
    794     template <class _Fp>
    795     iter_type __do_get_floating_point
    796                             (iter_type __b, iter_type __e, ios_base& __iob,
    797                              ios_base::iostate& __err, _Fp& __v) const;
    798 
    799     template <class _Signed>
    800     iter_type __do_get_signed
    801                             (iter_type __b, iter_type __e, ios_base& __iob,
    802                              ios_base::iostate& __err, _Signed& __v) const;
    803 
    804     template <class _Unsigned>
    805     iter_type __do_get_unsigned
    806                             (iter_type __b, iter_type __e, ios_base& __iob,
    807                              ios_base::iostate& __err, _Unsigned& __v) const;
    808 
    809 
    810     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    811                              ios_base::iostate& __err, bool& __v) const;
    812 
    813     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    814                              ios_base::iostate& __err, long& __v) const
    815     { return this->__do_get_signed ( __b, __e, __iob, __err, __v ); }
    816 
    817     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    818                              ios_base::iostate& __err, long long& __v) const
    819     { return this->__do_get_signed ( __b, __e, __iob, __err, __v ); }
    820 
    821     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    822                              ios_base::iostate& __err, unsigned short& __v) const
    823     { return this->__do_get_unsigned ( __b, __e, __iob, __err, __v ); }
    824 
    825     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    826                              ios_base::iostate& __err, unsigned int& __v) const
    827     { return this->__do_get_unsigned ( __b, __e, __iob, __err, __v ); }
    828 
    829     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    830                              ios_base::iostate& __err, unsigned long& __v) const
    831     { return this->__do_get_unsigned ( __b, __e, __iob, __err, __v ); }
    832 
    833     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    834                              ios_base::iostate& __err, unsigned long long& __v) const
    835     { return this->__do_get_unsigned ( __b, __e, __iob, __err, __v ); }
    836 
    837     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    838                              ios_base::iostate& __err, float& __v) const
    839     { return this->__do_get_floating_point ( __b, __e, __iob, __err, __v ); }
    840 
    841     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    842                              ios_base::iostate& __err, double& __v) const
    843     { return this->__do_get_floating_point ( __b, __e, __iob, __err, __v ); }
    844 
    845     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    846                              ios_base::iostate& __err, long double& __v) const
    847     { return this->__do_get_floating_point ( __b, __e, __iob, __err, __v ); }
    848 
    849     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
    850                              ios_base::iostate& __err, void*& __v) const;
    851 };
    852 
    853 template <class _CharT, class _InputIterator>
    854 locale::id
    855 num_get<_CharT, _InputIterator>::id;
    856 
    857 template <class _Tp>
    858 _Tp
    859 __num_get_signed_integral(const char* __a, const char* __a_end,
    860                           ios_base::iostate& __err, int __base)
    861 {
    862     if (__a != __a_end)
    863     {
    864         typename remove_reference<decltype(errno)>::type __save_errno = errno;
    865         errno = 0;
    866         char *__p2;
    867         long long __ll = strtoll_l(__a, &__p2, __base, _LIBCPP_GET_C_LOCALE);
    868         typename remove_reference<decltype(errno)>::type __current_errno = errno;
    869         if (__current_errno == 0)
    870             errno = __save_errno;
    871         if (__p2 != __a_end)
    872         {
    873             __err = ios_base::failbit;
    874             return 0;
    875         }
    876         else if (__current_errno == ERANGE         ||
    877                  __ll < numeric_limits<_Tp>::min() ||
    878                  numeric_limits<_Tp>::max() < __ll)
    879         {
    880             __err = ios_base::failbit;
    881             if (__ll > 0)
    882                 return numeric_limits<_Tp>::max();
    883             else
    884                 return numeric_limits<_Tp>::min();
    885         }
    886         return static_cast<_Tp>(__ll);
    887     }
    888     __err = ios_base::failbit;
    889     return 0;
    890 }
    891 
    892 template <class _Tp>
    893 _Tp
    894 __num_get_unsigned_integral(const char* __a, const char* __a_end,
    895                             ios_base::iostate& __err, int __base)
    896 {
    897     if (__a != __a_end)
    898     {
    899         if (*__a == '-')
    900         {
    901             __err = ios_base::failbit;
    902             return 0;
    903         }
    904         typename remove_reference<decltype(errno)>::type __save_errno = errno;
    905         errno = 0;
    906         char *__p2;
    907         unsigned long long __ll = strtoull_l(__a, &__p2, __base, _LIBCPP_GET_C_LOCALE);
    908         typename remove_reference<decltype(errno)>::type __current_errno = errno;
    909         if (__current_errno == 0)
    910             errno = __save_errno;
    911         if (__p2 != __a_end)
    912         {
    913             __err = ios_base::failbit;
    914             return 0;
    915         }
    916         else if (__current_errno == ERANGE ||
    917                  numeric_limits<_Tp>::max() < __ll)
    918         {
    919             __err = ios_base::failbit;
    920             return numeric_limits<_Tp>::max();
    921         }
    922         return static_cast<_Tp>(__ll);
    923     }
    924     __err = ios_base::failbit;
    925     return 0;
    926 }
    927 
    928 template <class _Tp>
    929 _Tp
    930 __num_get_float(const char* __a, const char* __a_end, ios_base::iostate& __err)
    931 {
    932     if (__a != __a_end)
    933     {
    934         typename remove_reference<decltype(errno)>::type __save_errno = errno;
    935         errno = 0;
    936         char *__p2;
    937         long double __ld = strtold_l(__a, &__p2, _LIBCPP_GET_C_LOCALE);
    938         typename remove_reference<decltype(errno)>::type __current_errno = errno;
    939         if (__current_errno == 0)
    940             errno = __save_errno;
    941         if (__p2 != __a_end)
    942         {
    943             __err = ios_base::failbit;
    944             return 0;
    945         }
    946         else if (__current_errno == ERANGE)
    947             __err = ios_base::failbit;
    948         return static_cast<_Tp>(__ld);
    949     }
    950     __err = ios_base::failbit;
    951     return 0;
    952 }
    953 
    954 template <class _CharT, class _InputIterator>
    955 _InputIterator
    956 num_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
    957                                         ios_base& __iob,
    958                                         ios_base::iostate& __err,
    959                                         bool& __v) const
    960 {
    961     if ((__iob.flags() & ios_base::boolalpha) == 0)
    962     {
    963         long __lv = -1;
    964         __b = do_get(__b, __e, __iob, __err, __lv);
    965         switch (__lv)
    966         {
    967         case 0:
    968             __v = false;
    969             break;
    970         case 1:
    971             __v = true;
    972             break;
    973         default:
    974             __v = true;
    975             __err = ios_base::failbit;
    976             break;
    977         }
    978         return __b;
    979     }
    980     const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__iob.getloc());
    981     const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__iob.getloc());
    982     typedef typename numpunct<_CharT>::string_type string_type;
    983     const string_type __names[2] = {__np.truename(), __np.falsename()};
    984     const string_type* __i = __scan_keyword(__b, __e, __names, __names+2,
    985                                             __ct, __err);
    986     __v = __i == __names;
    987     return __b;
    988 }
    989 
    990 // signed
    991 
    992 template <class _CharT, class _InputIterator>
    993 template <class _Signed>
    994 _InputIterator
    995 num_get<_CharT, _InputIterator>::__do_get_signed(iter_type __b, iter_type __e,
    996                                         ios_base& __iob,
    997                                         ios_base::iostate& __err,
    998                                         _Signed& __v) const
    999 {
   1000     // Stage 1
   1001     int __base = this->__get_base(__iob);
   1002     // Stage 2
   1003     char_type __atoms[26];
   1004     char_type __thousands_sep;
   1005     string __grouping = this->__stage2_int_prep(__iob, __atoms, __thousands_sep);
   1006     string __buf;
   1007     __buf.resize(__buf.capacity());
   1008     char* __a = &__buf[0];
   1009     char* __a_end = __a;
   1010     unsigned __g[__num_get_base::__num_get_buf_sz];
   1011     unsigned* __g_end = __g;
   1012     unsigned __dc = 0;
   1013     for (; __b != __e; ++__b)
   1014     {
   1015         if (__a_end == __a + __buf.size())
   1016         {
   1017             size_t __tmp = __buf.size();
   1018             __buf.resize(2*__buf.size());
   1019             __buf.resize(__buf.capacity());
   1020             __a = &__buf[0];
   1021             __a_end = __a + __tmp;
   1022         }
   1023         if (this->__stage2_int_loop(*__b, __base, __a, __a_end, __dc,
   1024                                     __thousands_sep, __grouping, __g, __g_end,
   1025                                     __atoms))
   1026             break;
   1027     }
   1028     if (__grouping.size() != 0 && __g_end-__g < __num_get_base::__num_get_buf_sz)
   1029         *__g_end++ = __dc;
   1030     // Stage 3
   1031     __v = __num_get_signed_integral<_Signed>(__a, __a_end, __err, __base);
   1032     // Digit grouping checked
   1033     __check_grouping(__grouping, __g, __g_end, __err);
   1034     // EOF checked
   1035     if (__b == __e)
   1036         __err |= ios_base::eofbit;
   1037     return __b;
   1038 }
   1039 
   1040 // unsigned
   1041 
   1042 template <class _CharT, class _InputIterator>
   1043 template <class _Unsigned>
   1044 _InputIterator
   1045 num_get<_CharT, _InputIterator>::__do_get_unsigned(iter_type __b, iter_type __e,
   1046                                         ios_base& __iob,
   1047                                         ios_base::iostate& __err,
   1048                                         _Unsigned& __v) const
   1049 {
   1050     // Stage 1
   1051     int __base = this->__get_base(__iob);
   1052     // Stage 2
   1053     char_type __atoms[26];
   1054     char_type __thousands_sep;
   1055     string __grouping = this->__stage2_int_prep(__iob, __atoms, __thousands_sep);
   1056     string __buf;
   1057     __buf.resize(__buf.capacity());
   1058     char* __a = &__buf[0];
   1059     char* __a_end = __a;
   1060     unsigned __g[__num_get_base::__num_get_buf_sz];
   1061     unsigned* __g_end = __g;
   1062     unsigned __dc = 0;
   1063     for (; __b != __e; ++__b)
   1064     {
   1065         if (__a_end == __a + __buf.size())
   1066         {
   1067             size_t __tmp = __buf.size();
   1068             __buf.resize(2*__buf.size());
   1069             __buf.resize(__buf.capacity());
   1070             __a = &__buf[0];
   1071             __a_end = __a + __tmp;
   1072         }
   1073         if (this->__stage2_int_loop(*__b, __base, __a, __a_end, __dc,
   1074                                     __thousands_sep, __grouping, __g, __g_end,
   1075                                     __atoms))
   1076             break;
   1077     }
   1078     if (__grouping.size() != 0 && __g_end-__g < __num_get_base::__num_get_buf_sz)
   1079         *__g_end++ = __dc;
   1080     // Stage 3
   1081     __v = __num_get_unsigned_integral<_Unsigned>(__a, __a_end, __err, __base);
   1082     // Digit grouping checked
   1083     __check_grouping(__grouping, __g, __g_end, __err);
   1084     // EOF checked
   1085     if (__b == __e)
   1086         __err |= ios_base::eofbit;
   1087     return __b;
   1088 }
   1089 
   1090 // floating point
   1091 
   1092 template <class _CharT, class _InputIterator>
   1093 template <class _Fp>
   1094 _InputIterator
   1095 num_get<_CharT, _InputIterator>::__do_get_floating_point(iter_type __b, iter_type __e,
   1096                                         ios_base& __iob,
   1097                                         ios_base::iostate& __err,
   1098                                         _Fp& __v) const
   1099 {
   1100     // Stage 1, nothing to do
   1101     // Stage 2
   1102     char_type __atoms[32];
   1103     char_type __decimal_point;
   1104     char_type __thousands_sep;
   1105     string __grouping = this->__stage2_float_prep(__iob, __atoms,
   1106                                                   __decimal_point,
   1107                                                   __thousands_sep);
   1108     string __buf;
   1109     __buf.resize(__buf.capacity());
   1110     char* __a = &__buf[0];
   1111     char* __a_end = __a;
   1112     unsigned __g[__num_get_base::__num_get_buf_sz];
   1113     unsigned* __g_end = __g;
   1114     unsigned __dc = 0;
   1115     bool __in_units = true;
   1116     char __exp = 'E';
   1117     for (; __b != __e; ++__b)
   1118     {
   1119         if (__a_end == __a + __buf.size())
   1120         {
   1121             size_t __tmp = __buf.size();
   1122             __buf.resize(2*__buf.size());
   1123             __buf.resize(__buf.capacity());
   1124             __a = &__buf[0];
   1125             __a_end = __a + __tmp;
   1126         }
   1127         if (this->__stage2_float_loop(*__b, __in_units, __exp, __a, __a_end,
   1128                                       __decimal_point, __thousands_sep,
   1129                                       __grouping, __g, __g_end,
   1130                                       __dc, __atoms))
   1131             break;
   1132     }
   1133     if (__grouping.size() != 0 && __in_units && __g_end-__g < __num_get_base::__num_get_buf_sz)
   1134         *__g_end++ = __dc;
   1135     // Stage 3
   1136     __v = __num_get_float<_Fp>(__a, __a_end, __err);
   1137     // Digit grouping checked
   1138     __check_grouping(__grouping, __g, __g_end, __err);
   1139     // EOF checked
   1140     if (__b == __e)
   1141         __err |= ios_base::eofbit;
   1142     return __b;
   1143 }
   1144 
   1145 template <class _CharT, class _InputIterator>
   1146 _InputIterator
   1147 num_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
   1148                                         ios_base& __iob,
   1149                                         ios_base::iostate& __err,
   1150                                         void*& __v) const
   1151 {
   1152     // Stage 1
   1153     int __base = 16;
   1154     // Stage 2
   1155     char_type __atoms[26];
   1156     char_type __thousands_sep = 0;
   1157     string __grouping;
   1158     use_facet<ctype<_CharT> >(__iob.getloc()).widen(__num_get_base::__src,
   1159                                                     __num_get_base::__src + 26, __atoms);
   1160     string __buf;
   1161     __buf.resize(__buf.capacity());
   1162     char* __a = &__buf[0];
   1163     char* __a_end = __a;
   1164     unsigned __g[__num_get_base::__num_get_buf_sz];
   1165     unsigned* __g_end = __g;
   1166     unsigned __dc = 0;
   1167     for (; __b != __e; ++__b)
   1168     {
   1169         if (__a_end == __a + __buf.size())
   1170         {
   1171             size_t __tmp = __buf.size();
   1172             __buf.resize(2*__buf.size());
   1173             __buf.resize(__buf.capacity());
   1174             __a = &__buf[0];
   1175             __a_end = __a + __tmp;
   1176         }
   1177         if (this->__stage2_int_loop(*__b, __base, __a, __a_end, __dc,
   1178                                     __thousands_sep, __grouping,
   1179                                     __g, __g_end, __atoms))
   1180             break;
   1181     }
   1182     // Stage 3
   1183     __buf.resize(__a_end - __a);
   1184 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1185     if (sscanf_l(__buf.c_str(), _LIBCPP_GET_C_LOCALE, "%p", &__v) != 1)
   1186 #else
   1187     if (__sscanf_l(__buf.c_str(), __cloc(), "%p", &__v) != 1)
   1188 #endif
   1189         __err = ios_base::failbit;
   1190     // EOF checked
   1191     if (__b == __e)
   1192         __err |= ios_base::eofbit;
   1193     return __b;
   1194 }
   1195 
   1196 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS num_get<char>)
   1197 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS num_get<wchar_t>)
   1198 
   1199 struct _LIBCPP_TYPE_VIS __num_put_base
   1200 {
   1201 protected:
   1202     static void __format_int(char* __fmt, const char* __len, bool __signd,
   1203                              ios_base::fmtflags __flags);
   1204     static bool __format_float(char* __fmt, const char* __len,
   1205                                ios_base::fmtflags __flags);
   1206     static char* __identify_padding(char* __nb, char* __ne,
   1207                                     const ios_base& __iob);
   1208 };
   1209 
   1210 template <class _CharT>
   1211 struct __num_put
   1212     : protected __num_put_base
   1213 {
   1214     static void __widen_and_group_int(char* __nb, char* __np, char* __ne,
   1215                                       _CharT* __ob, _CharT*& __op, _CharT*& __oe,
   1216                                       const locale& __loc);
   1217     static void __widen_and_group_float(char* __nb, char* __np, char* __ne,
   1218                                         _CharT* __ob, _CharT*& __op, _CharT*& __oe,
   1219                                         const locale& __loc);
   1220 };
   1221 
   1222 template <class _CharT>
   1223 void
   1224 __num_put<_CharT>::__widen_and_group_int(char* __nb, char* __np, char* __ne,
   1225                                          _CharT* __ob, _CharT*& __op, _CharT*& __oe,
   1226                                          const locale& __loc)
   1227 {
   1228     const ctype<_CharT>&    __ct = use_facet<ctype<_CharT> >   (__loc);
   1229     const numpunct<_CharT>& __npt = use_facet<numpunct<_CharT> >(__loc);
   1230     string __grouping = __npt.grouping();
   1231     if (__grouping.empty())
   1232     {
   1233         __ct.widen(__nb, __ne, __ob);
   1234         __oe = __ob + (__ne - __nb);
   1235     }
   1236     else
   1237     {
   1238         __oe = __ob;
   1239         char* __nf = __nb;
   1240         if (*__nf == '-' || *__nf == '+')
   1241             *__oe++ = __ct.widen(*__nf++);
   1242         if (__ne - __nf >= 2 && __nf[0] == '0' && (__nf[1] == 'x' ||
   1243                                                    __nf[1] == 'X'))
   1244         {
   1245             *__oe++ = __ct.widen(*__nf++);
   1246             *__oe++ = __ct.widen(*__nf++);
   1247         }
   1248         reverse(__nf, __ne);
   1249         _CharT __thousands_sep = __npt.thousands_sep();
   1250         unsigned __dc = 0;
   1251         unsigned __dg = 0;
   1252         for (char* __p = __nf; __p < __ne; ++__p)
   1253         {
   1254             if (static_cast<unsigned>(__grouping[__dg]) > 0 &&
   1255                 __dc == static_cast<unsigned>(__grouping[__dg]))
   1256             {
   1257                 *__oe++ = __thousands_sep;
   1258                 __dc = 0;
   1259                 if (__dg < __grouping.size()-1)
   1260                     ++__dg;
   1261             }
   1262             *__oe++ = __ct.widen(*__p);
   1263             ++__dc;
   1264         }
   1265         reverse(__ob + (__nf - __nb), __oe);
   1266     }
   1267     if (__np == __ne)
   1268         __op = __oe;
   1269     else
   1270         __op = __ob + (__np - __nb);
   1271 }
   1272 
   1273 template <class _CharT>
   1274 void
   1275 __num_put<_CharT>::__widen_and_group_float(char* __nb, char* __np, char* __ne,
   1276                                            _CharT* __ob, _CharT*& __op, _CharT*& __oe,
   1277                                            const locale& __loc)
   1278 {
   1279     const ctype<_CharT>&    __ct = use_facet<ctype<_CharT> >   (__loc);
   1280     const numpunct<_CharT>& __npt = use_facet<numpunct<_CharT> >(__loc);
   1281     string __grouping = __npt.grouping();
   1282     __oe = __ob;
   1283     char* __nf = __nb;
   1284     if (*__nf == '-' || *__nf == '+')
   1285         *__oe++ = __ct.widen(*__nf++);
   1286     char* __ns;
   1287     if (__ne - __nf >= 2 && __nf[0] == '0' && (__nf[1] == 'x' ||
   1288                                                __nf[1] == 'X'))
   1289     {
   1290         *__oe++ = __ct.widen(*__nf++);
   1291         *__oe++ = __ct.widen(*__nf++);
   1292         for (__ns = __nf; __ns < __ne; ++__ns)
   1293             if (!isxdigit_l(*__ns, _LIBCPP_GET_C_LOCALE))
   1294                 break;
   1295     }
   1296     else
   1297     {
   1298         for (__ns = __nf; __ns < __ne; ++__ns)
   1299             if (!isdigit_l(*__ns, _LIBCPP_GET_C_LOCALE))
   1300                 break;
   1301     }
   1302     if (__grouping.empty())
   1303     {
   1304         __ct.widen(__nf, __ns, __oe);
   1305         __oe += __ns - __nf;
   1306     }
   1307     else
   1308     {
   1309         reverse(__nf, __ns);
   1310         _CharT __thousands_sep = __npt.thousands_sep();
   1311         unsigned __dc = 0;
   1312         unsigned __dg = 0;
   1313         for (char* __p = __nf; __p < __ns; ++__p)
   1314         {
   1315             if (__grouping[__dg] > 0 && __dc == static_cast<unsigned>(__grouping[__dg]))
   1316             {
   1317                 *__oe++ = __thousands_sep;
   1318                 __dc = 0;
   1319                 if (__dg < __grouping.size()-1)
   1320                     ++__dg;
   1321             }
   1322             *__oe++ = __ct.widen(*__p);
   1323             ++__dc;
   1324         }
   1325         reverse(__ob + (__nf - __nb), __oe);
   1326     }
   1327     for (__nf = __ns; __nf < __ne; ++__nf)
   1328     {
   1329         if (*__nf == '.')
   1330         {
   1331             *__oe++ = __npt.decimal_point();
   1332             ++__nf;
   1333             break;
   1334         }
   1335         else
   1336             *__oe++ = __ct.widen(*__nf);
   1337     }
   1338     __ct.widen(__nf, __ne, __oe);
   1339     __oe += __ne - __nf;
   1340     if (__np == __ne)
   1341         __op = __oe;
   1342     else
   1343         __op = __ob + (__np - __nb);
   1344 }
   1345 
   1346 _LIBCPP_EXTERN_TEMPLATE2(struct _LIBCPP_TYPE_VIS __num_put<char>)
   1347 _LIBCPP_EXTERN_TEMPLATE2(struct _LIBCPP_TYPE_VIS __num_put<wchar_t>)
   1348 
   1349 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
   1350 class _LIBCPP_TYPE_VIS_ONLY num_put
   1351     : public locale::facet,
   1352       private __num_put<_CharT>
   1353 {
   1354 public:
   1355     typedef _CharT char_type;
   1356     typedef _OutputIterator iter_type;
   1357 
   1358     _LIBCPP_ALWAYS_INLINE
   1359     explicit num_put(size_t __refs = 0)
   1360         : locale::facet(__refs) {}
   1361 
   1362     _LIBCPP_ALWAYS_INLINE
   1363     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1364                   bool __v) const
   1365     {
   1366         return do_put(__s, __iob, __fl, __v);
   1367     }
   1368 
   1369     _LIBCPP_ALWAYS_INLINE
   1370     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1371                   long __v) const
   1372     {
   1373         return do_put(__s, __iob, __fl, __v);
   1374     }
   1375 
   1376     _LIBCPP_ALWAYS_INLINE
   1377     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1378                   long long __v) const
   1379     {
   1380         return do_put(__s, __iob, __fl, __v);
   1381     }
   1382 
   1383     _LIBCPP_ALWAYS_INLINE
   1384     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1385                   unsigned long __v) const
   1386     {
   1387         return do_put(__s, __iob, __fl, __v);
   1388     }
   1389 
   1390     _LIBCPP_ALWAYS_INLINE
   1391     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1392                   unsigned long long __v) const
   1393     {
   1394         return do_put(__s, __iob, __fl, __v);
   1395     }
   1396 
   1397     _LIBCPP_ALWAYS_INLINE
   1398     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1399                   double __v) const
   1400     {
   1401         return do_put(__s, __iob, __fl, __v);
   1402     }
   1403 
   1404     _LIBCPP_ALWAYS_INLINE
   1405     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1406                   long double __v) const
   1407     {
   1408         return do_put(__s, __iob, __fl, __v);
   1409     }
   1410 
   1411     _LIBCPP_ALWAYS_INLINE
   1412     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   1413                   const void* __v) const
   1414     {
   1415         return do_put(__s, __iob, __fl, __v);
   1416     }
   1417 
   1418     static locale::id id;
   1419 
   1420 protected:
   1421     _LIBCPP_ALWAYS_INLINE
   1422     ~num_put() {}
   1423 
   1424     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1425                              bool __v) const;
   1426     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1427                              long __v) const;
   1428     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1429                              long long __v) const;
   1430     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1431                              unsigned long) const;
   1432     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1433                              unsigned long long) const;
   1434     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1435                              double __v) const;
   1436     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1437                              long double __v) const;
   1438     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
   1439                              const void* __v) const;
   1440 };
   1441 
   1442 template <class _CharT, class _OutputIterator>
   1443 locale::id
   1444 num_put<_CharT, _OutputIterator>::id;
   1445 
   1446 template <class _CharT, class _OutputIterator>
   1447 _LIBCPP_HIDDEN
   1448 _OutputIterator
   1449 __pad_and_output(_OutputIterator __s,
   1450                  const _CharT* __ob, const _CharT* __op, const _CharT* __oe,
   1451                  ios_base& __iob, _CharT __fl)
   1452 {
   1453     streamsize __sz = __oe - __ob;
   1454     streamsize __ns = __iob.width();
   1455     if (__ns > __sz)
   1456         __ns -= __sz;
   1457     else
   1458         __ns = 0;
   1459     for (;__ob < __op; ++__ob, ++__s)
   1460         *__s = *__ob;
   1461     for (; __ns; --__ns, ++__s)
   1462         *__s = __fl;
   1463     for (; __ob < __oe; ++__ob, ++__s)
   1464         *__s = *__ob;
   1465     __iob.width(0);
   1466     return __s;
   1467 }
   1468 
   1469 #if !defined(__APPLE__) || \
   1470     (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \
   1471     (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0)
   1472 
   1473 template <class _CharT, class _Traits>
   1474 _LIBCPP_HIDDEN
   1475 ostreambuf_iterator<_CharT, _Traits>
   1476 __pad_and_output(ostreambuf_iterator<_CharT, _Traits> __s,
   1477                  const _CharT* __ob, const _CharT* __op, const _CharT* __oe,
   1478                  ios_base& __iob, _CharT __fl)
   1479 {
   1480     if (__s.__sbuf_ == nullptr)
   1481         return __s;
   1482     streamsize __sz = __oe - __ob;
   1483     streamsize __ns = __iob.width();
   1484     if (__ns > __sz)
   1485         __ns -= __sz;
   1486     else
   1487         __ns = 0;
   1488     streamsize __np = __op - __ob;
   1489     if (__np > 0)
   1490     {
   1491         if (__s.__sbuf_->sputn(__ob, __np) != __np)
   1492         {
   1493             __s.__sbuf_ = nullptr;
   1494             return __s;
   1495         }
   1496     }
   1497     if (__ns > 0)
   1498     {
   1499         basic_string<_CharT, _Traits> __sp(__ns, __fl);
   1500         if (__s.__sbuf_->sputn(__sp.data(), __ns) != __ns)
   1501         {
   1502             __s.__sbuf_ = nullptr;
   1503             return __s;
   1504         }
   1505     }
   1506     __np = __oe - __op;
   1507     if (__np > 0)
   1508     {
   1509         if (__s.__sbuf_->sputn(__op, __np) != __np)
   1510         {
   1511             __s.__sbuf_ = nullptr;
   1512             return __s;
   1513         }
   1514     }
   1515     __iob.width(0);
   1516     return __s;
   1517 }
   1518 
   1519 #endif
   1520 
   1521 template <class _CharT, class _OutputIterator>
   1522 _OutputIterator
   1523 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1524                                          char_type __fl, bool __v) const
   1525 {
   1526     if ((__iob.flags() & ios_base::boolalpha) == 0)
   1527         return do_put(__s, __iob, __fl, (unsigned long)__v);
   1528     const numpunct<char_type>& __np = use_facet<numpunct<char_type> >(__iob.getloc());
   1529     typedef typename numpunct<char_type>::string_type string_type;
   1530 #if _LIBCPP_DEBUG_LEVEL >= 2
   1531     string_type __tmp(__v ? __np.truename() : __np.falsename());
   1532     string_type __nm = _VSTD::move(__tmp);
   1533 #else
   1534     string_type __nm = __v ? __np.truename() : __np.falsename();
   1535 #endif
   1536     for (typename string_type::iterator __i = __nm.begin(); __i != __nm.end(); ++__i, ++__s)
   1537         *__s = *__i;
   1538     return __s;
   1539 }
   1540 
   1541 template <class _CharT, class _OutputIterator>
   1542 _OutputIterator
   1543 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1544                                          char_type __fl, long __v) const
   1545 {
   1546     // Stage 1 - Get number in narrow char
   1547     char __fmt[6] = {'%', 0};
   1548     const char* __len = "l";
   1549     this->__format_int(__fmt+1, __len, true, __iob.flags());
   1550     const unsigned __nbuf = (numeric_limits<long>::digits / 3)
   1551                           + ((numeric_limits<long>::digits % 3) != 0)
   1552                           + 1;
   1553     char __nar[__nbuf];
   1554 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1555     int __nc = snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1556 #else
   1557     int __nc = __snprintf_l(__nar, sizeof(__nar), __cloc(), __fmt, __v);
   1558 #endif
   1559     char* __ne = __nar + __nc;
   1560     char* __np = this->__identify_padding(__nar, __ne, __iob);
   1561     // Stage 2 - Widen __nar while adding thousands separators
   1562     char_type __o[2*(__nbuf-1) - 1];
   1563     char_type* __op;  // pad here
   1564     char_type* __oe;  // end of output
   1565     this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
   1566     // [__o, __oe) contains thousands_sep'd wide number
   1567     // Stage 3 & 4
   1568     return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
   1569 }
   1570 
   1571 template <class _CharT, class _OutputIterator>
   1572 _OutputIterator
   1573 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1574                                          char_type __fl, long long __v) const
   1575 {
   1576     // Stage 1 - Get number in narrow char
   1577     char __fmt[8] = {'%', 0};
   1578     const char* __len = "ll";
   1579     this->__format_int(__fmt+1, __len, true, __iob.flags());
   1580     const unsigned __nbuf = (numeric_limits<long long>::digits / 3)
   1581                           + ((numeric_limits<long long>::digits % 3) != 0)
   1582                           + 1;
   1583     char __nar[__nbuf];
   1584 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1585     int __nc = snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1586 #else
   1587     int __nc = __snprintf_l(__nar, sizeof(__nar), __cloc(), __fmt, __v);
   1588 #endif
   1589     char* __ne = __nar + __nc;
   1590     char* __np = this->__identify_padding(__nar, __ne, __iob);
   1591     // Stage 2 - Widen __nar while adding thousands separators
   1592     char_type __o[2*(__nbuf-1) - 1];
   1593     char_type* __op;  // pad here
   1594     char_type* __oe;  // end of output
   1595     this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
   1596     // [__o, __oe) contains thousands_sep'd wide number
   1597     // Stage 3 & 4
   1598     return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
   1599 }
   1600 
   1601 template <class _CharT, class _OutputIterator>
   1602 _OutputIterator
   1603 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1604                                          char_type __fl, unsigned long __v) const
   1605 {
   1606     // Stage 1 - Get number in narrow char
   1607     char __fmt[6] = {'%', 0};
   1608     const char* __len = "l";
   1609     this->__format_int(__fmt+1, __len, false, __iob.flags());
   1610     const unsigned __nbuf = (numeric_limits<unsigned long>::digits / 3)
   1611                           + ((numeric_limits<unsigned long>::digits % 3) != 0)
   1612                           + 1;
   1613     char __nar[__nbuf];
   1614 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1615     int __nc = snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1616 #else
   1617     int __nc = __snprintf_l(__nar, sizeof(__nar), __cloc(), __fmt, __v);
   1618 #endif
   1619     char* __ne = __nar + __nc;
   1620     char* __np = this->__identify_padding(__nar, __ne, __iob);
   1621     // Stage 2 - Widen __nar while adding thousands separators
   1622     char_type __o[2*(__nbuf-1) - 1];
   1623     char_type* __op;  // pad here
   1624     char_type* __oe;  // end of output
   1625     this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
   1626     // [__o, __oe) contains thousands_sep'd wide number
   1627     // Stage 3 & 4
   1628     return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
   1629 }
   1630 
   1631 template <class _CharT, class _OutputIterator>
   1632 _OutputIterator
   1633 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1634                                          char_type __fl, unsigned long long __v) const
   1635 {
   1636     // Stage 1 - Get number in narrow char
   1637     char __fmt[8] = {'%', 0};
   1638     const char* __len = "ll";
   1639     this->__format_int(__fmt+1, __len, false, __iob.flags());
   1640     const unsigned __nbuf = (numeric_limits<unsigned long long>::digits / 3)
   1641                           + ((numeric_limits<unsigned long long>::digits % 3) != 0)
   1642                           + 1;
   1643     char __nar[__nbuf];
   1644 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1645     int __nc = snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1646 #else
   1647     int __nc = __snprintf_l(__nar, sizeof(__nar), __cloc(), __fmt, __v);
   1648 #endif
   1649     char* __ne = __nar + __nc;
   1650     char* __np = this->__identify_padding(__nar, __ne, __iob);
   1651     // Stage 2 - Widen __nar while adding thousands separators
   1652     char_type __o[2*(__nbuf-1) - 1];
   1653     char_type* __op;  // pad here
   1654     char_type* __oe;  // end of output
   1655     this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
   1656     // [__o, __oe) contains thousands_sep'd wide number
   1657     // Stage 3 & 4
   1658     return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
   1659 }
   1660 
   1661 template <class _CharT, class _OutputIterator>
   1662 _OutputIterator
   1663 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1664                                          char_type __fl, double __v) const
   1665 {
   1666     // Stage 1 - Get number in narrow char
   1667     char __fmt[8] = {'%', 0};
   1668     const char* __len = "";
   1669     bool __specify_precision = this->__format_float(__fmt+1, __len, __iob.flags());
   1670     const unsigned __nbuf = 30;
   1671     char __nar[__nbuf];
   1672     char* __nb = __nar;
   1673     int __nc;
   1674     if (__specify_precision)
   1675 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1676         __nc = snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt,
   1677                                    (int)__iob.precision(), __v);
   1678 #else
   1679         __nc = __snprintf_l(__nb, __nbuf, __cloc(), __fmt,
   1680                             (int)__iob.precision(), __v);
   1681 #endif
   1682     else
   1683 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1684         __nc = snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1685 #else
   1686         __nc = __snprintf_l(__nb, __nbuf, __cloc(), __fmt, __v);
   1687 #endif
   1688     unique_ptr<char, void(*)(void*)> __nbh(0, free);
   1689     if (__nc > static_cast<int>(__nbuf-1))
   1690     {
   1691         if (__specify_precision)
   1692 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1693             __nc = asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, (int)__iob.precision(), __v);
   1694 #else
   1695             __nc = __asprintf_l(&__nb, __cloc(), __fmt,
   1696                               (int)__iob.precision(), __v);
   1697 #endif
   1698         else
   1699 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1700             __nc = asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1701 #else
   1702             __nc = __asprintf_l(&__nb, __cloc(), __fmt, (int)__iob.precision(), __v);
   1703 #endif
   1704         if (__nb == 0)
   1705             __throw_bad_alloc();
   1706         __nbh.reset(__nb);
   1707     }
   1708     char* __ne = __nb + __nc;
   1709     char* __np = this->__identify_padding(__nb, __ne, __iob);
   1710     // Stage 2 - Widen __nar while adding thousands separators
   1711     char_type __o[2*(__nbuf-1) - 1];
   1712     char_type* __ob = __o;
   1713     unique_ptr<char_type, void(*)(void*)> __obh(0, free);
   1714     if (__nb != __nar)
   1715     {
   1716         __ob = (char_type*)malloc(2*static_cast<size_t>(__nc)*sizeof(char_type));
   1717         if (__ob == 0)
   1718             __throw_bad_alloc();
   1719         __obh.reset(__ob);
   1720     }
   1721     char_type* __op;  // pad here
   1722     char_type* __oe;  // end of output
   1723     this->__widen_and_group_float(__nb, __np, __ne, __ob, __op, __oe, __iob.getloc());
   1724     // [__o, __oe) contains thousands_sep'd wide number
   1725     // Stage 3 & 4
   1726     __s = __pad_and_output(__s, __ob, __op, __oe, __iob, __fl);
   1727     return __s;
   1728 }
   1729 
   1730 template <class _CharT, class _OutputIterator>
   1731 _OutputIterator
   1732 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1733                                          char_type __fl, long double __v) const
   1734 {
   1735     // Stage 1 - Get number in narrow char
   1736     char __fmt[8] = {'%', 0};
   1737     const char* __len = "L";
   1738     bool __specify_precision = this->__format_float(__fmt+1, __len, __iob.flags());
   1739     const unsigned __nbuf = 30;
   1740     char __nar[__nbuf];
   1741     char* __nb = __nar;
   1742     int __nc;
   1743     if (__specify_precision)
   1744 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1745         __nc = snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt,
   1746                                    (int)__iob.precision(), __v);
   1747 #else
   1748         __nc = __snprintf_l(__nb, __nbuf, __cloc(), __fmt,
   1749                             (int)__iob.precision(), __v);
   1750 #endif
   1751     else
   1752 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1753         __nc = snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1754 #else
   1755         __nc = __snprintf_l(__nb, __nbuf, __cloc(), __fmt, __v);
   1756 #endif
   1757     unique_ptr<char, void(*)(void*)> __nbh(0, free);
   1758     if (__nc > static_cast<int>(__nbuf-1))
   1759     {
   1760         if (__specify_precision)
   1761 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1762             __nc = asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, (int)__iob.precision(), __v);
   1763 #else
   1764             __nc = __asprintf_l(&__nb, __cloc(), __fmt,
   1765                               (int)__iob.precision(), __v);
   1766 #endif
   1767         else
   1768 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1769             __nc = asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1770 #else
   1771             __nc = __asprintf_l(&__nb, __cloc(), __fmt, __v);
   1772 #endif
   1773         if (__nb == 0)
   1774             __throw_bad_alloc();
   1775         __nbh.reset(__nb);
   1776     }
   1777     char* __ne = __nb + __nc;
   1778     char* __np = this->__identify_padding(__nb, __ne, __iob);
   1779     // Stage 2 - Widen __nar while adding thousands separators
   1780     char_type __o[2*(__nbuf-1) - 1];
   1781     char_type* __ob = __o;
   1782     unique_ptr<char_type, void(*)(void*)> __obh(0, free);
   1783     if (__nb != __nar)
   1784     {
   1785         __ob = (char_type*)malloc(2*static_cast<size_t>(__nc)*sizeof(char_type));
   1786         if (__ob == 0)
   1787             __throw_bad_alloc();
   1788         __obh.reset(__ob);
   1789     }
   1790     char_type* __op;  // pad here
   1791     char_type* __oe;  // end of output
   1792     this->__widen_and_group_float(__nb, __np, __ne, __ob, __op, __oe, __iob.getloc());
   1793     // [__o, __oe) contains thousands_sep'd wide number
   1794     // Stage 3 & 4
   1795     __s = __pad_and_output(__s, __ob, __op, __oe, __iob, __fl);
   1796     return __s;
   1797 }
   1798 
   1799 template <class _CharT, class _OutputIterator>
   1800 _OutputIterator
   1801 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
   1802                                          char_type __fl, const void* __v) const
   1803 {
   1804     // Stage 1 - Get pointer in narrow char
   1805     char __fmt[6] = "%p";
   1806     const unsigned __nbuf = 20;
   1807     char __nar[__nbuf];
   1808 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   1809     int __nc = snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
   1810 #else
   1811     int __nc = __snprintf_l(__nar, sizeof(__nar), __cloc(), __fmt, __v);
   1812 #endif
   1813     char* __ne = __nar + __nc;
   1814     char* __np = this->__identify_padding(__nar, __ne, __iob);
   1815     // Stage 2 - Widen __nar
   1816     char_type __o[2*(__nbuf-1) - 1];
   1817     char_type* __op;  // pad here
   1818     char_type* __oe;  // end of output
   1819     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   1820     __ct.widen(__nar, __ne, __o);
   1821     __oe = __o + (__ne - __nar);
   1822     if (__np == __ne)
   1823         __op = __oe;
   1824     else
   1825         __op = __o + (__np - __nar);
   1826     // [__o, __oe) contains wide number
   1827     // Stage 3 & 4
   1828     return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
   1829 }
   1830 
   1831 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS num_put<char>)
   1832 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS num_put<wchar_t>)
   1833 
   1834 template <class _CharT, class _InputIterator>
   1835 _LIBCPP_HIDDEN
   1836 int
   1837 __get_up_to_n_digits(_InputIterator& __b, _InputIterator __e,
   1838                      ios_base::iostate& __err, const ctype<_CharT>& __ct, int __n)
   1839 {
   1840     // Precondition:  __n >= 1
   1841     if (__b == __e)
   1842     {
   1843         __err |= ios_base::eofbit | ios_base::failbit;
   1844         return 0;
   1845     }
   1846     // get first digit
   1847     _CharT __c = *__b;
   1848     if (!__ct.is(ctype_base::digit, __c))
   1849     {
   1850         __err |= ios_base::failbit;
   1851         return 0;
   1852     }
   1853     int __r = __ct.narrow(__c, 0) - '0';
   1854     for (++__b, --__n; __b != __e && __n > 0; ++__b, --__n)
   1855     {
   1856         // get next digit
   1857         __c = *__b;
   1858         if (!__ct.is(ctype_base::digit, __c))
   1859             return __r;
   1860         __r = __r * 10 + __ct.narrow(__c, 0) - '0';
   1861     }
   1862     if (__b == __e)
   1863         __err |= ios_base::eofbit;
   1864     return __r;
   1865 }
   1866 
   1867 class _LIBCPP_TYPE_VIS time_base
   1868 {
   1869 public:
   1870     enum dateorder {no_order, dmy, mdy, ymd, ydm};
   1871 };
   1872 
   1873 template <class _CharT>
   1874 class _LIBCPP_TYPE_VIS __time_get_c_storage
   1875 {
   1876 protected:
   1877     typedef basic_string<_CharT> string_type;
   1878 
   1879     virtual const string_type* __weeks() const;
   1880     virtual const string_type* __months() const;
   1881     virtual const string_type* __am_pm() const;
   1882     virtual const string_type& __c() const;
   1883     virtual const string_type& __r() const;
   1884     virtual const string_type& __x() const;
   1885     virtual const string_type& __X() const;
   1886 };
   1887 
   1888 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
   1889 class _LIBCPP_TYPE_VIS_ONLY time_get
   1890     : public locale::facet,
   1891       public time_base,
   1892       private __time_get_c_storage<_CharT>
   1893 {
   1894 public:
   1895     typedef _CharT                  char_type;
   1896     typedef _InputIterator          iter_type;
   1897     typedef time_base::dateorder    dateorder;
   1898     typedef basic_string<char_type> string_type;
   1899 
   1900     _LIBCPP_ALWAYS_INLINE
   1901     explicit time_get(size_t __refs = 0)
   1902         : locale::facet(__refs) {}
   1903 
   1904     _LIBCPP_ALWAYS_INLINE
   1905     dateorder date_order() const
   1906     {
   1907         return this->do_date_order();
   1908     }
   1909 
   1910     _LIBCPP_ALWAYS_INLINE
   1911     iter_type get_time(iter_type __b, iter_type __e, ios_base& __iob,
   1912                        ios_base::iostate& __err, tm* __tm) const
   1913     {
   1914         return do_get_time(__b, __e, __iob, __err, __tm);
   1915     }
   1916 
   1917     _LIBCPP_ALWAYS_INLINE
   1918     iter_type get_date(iter_type __b, iter_type __e, ios_base& __iob,
   1919                        ios_base::iostate& __err, tm* __tm) const
   1920     {
   1921         return do_get_date(__b, __e, __iob, __err, __tm);
   1922     }
   1923 
   1924     _LIBCPP_ALWAYS_INLINE
   1925     iter_type get_weekday(iter_type __b, iter_type __e, ios_base& __iob,
   1926                           ios_base::iostate& __err, tm* __tm) const
   1927     {
   1928         return do_get_weekday(__b, __e, __iob, __err, __tm);
   1929     }
   1930 
   1931     _LIBCPP_ALWAYS_INLINE
   1932     iter_type get_monthname(iter_type __b, iter_type __e, ios_base& __iob,
   1933                             ios_base::iostate& __err, tm* __tm) const
   1934     {
   1935         return do_get_monthname(__b, __e, __iob, __err, __tm);
   1936     }
   1937 
   1938     _LIBCPP_ALWAYS_INLINE
   1939     iter_type get_year(iter_type __b, iter_type __e, ios_base& __iob,
   1940                        ios_base::iostate& __err, tm* __tm) const
   1941     {
   1942         return do_get_year(__b, __e, __iob, __err, __tm);
   1943     }
   1944 
   1945     _LIBCPP_ALWAYS_INLINE
   1946     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
   1947                   ios_base::iostate& __err, tm *__tm,
   1948                   char __fmt, char __mod = 0) const
   1949     {
   1950         return do_get(__b, __e, __iob, __err, __tm, __fmt, __mod);
   1951     }
   1952 
   1953     iter_type get(iter_type __b, iter_type __e, ios_base& __iob,
   1954                   ios_base::iostate& __err, tm* __tm,
   1955                   const char_type* __fmtb, const char_type* __fmte) const;
   1956 
   1957     static locale::id id;
   1958 
   1959 protected:
   1960     _LIBCPP_ALWAYS_INLINE
   1961     ~time_get() {}
   1962 
   1963     virtual dateorder do_date_order() const;
   1964     virtual iter_type do_get_time(iter_type __b, iter_type __e, ios_base& __iob,
   1965                                   ios_base::iostate& __err, tm* __tm) const;
   1966     virtual iter_type do_get_date(iter_type __b, iter_type __e, ios_base& __iob,
   1967                                   ios_base::iostate& __err, tm* __tm) const;
   1968     virtual iter_type do_get_weekday(iter_type __b, iter_type __e, ios_base& __iob,
   1969                                      ios_base::iostate& __err, tm* __tm) const;
   1970     virtual iter_type do_get_monthname(iter_type __b, iter_type __e, ios_base& __iob,
   1971                                        ios_base::iostate& __err, tm* __tm) const;
   1972     virtual iter_type do_get_year(iter_type __b, iter_type __e, ios_base& __iob,
   1973                                   ios_base::iostate& __err, tm* __tm) const;
   1974     virtual iter_type do_get(iter_type __b, iter_type __e, ios_base& __iob,
   1975                              ios_base::iostate& __err, tm* __tm,
   1976                              char __fmt, char __mod) const;
   1977 private:
   1978     void __get_white_space(iter_type& __b, iter_type __e,
   1979                            ios_base::iostate& __err, const ctype<char_type>& __ct) const;
   1980     void __get_percent(iter_type& __b, iter_type __e, ios_base::iostate& __err,
   1981                        const ctype<char_type>& __ct) const;
   1982 
   1983     void __get_weekdayname(int& __m,
   1984                            iter_type& __b, iter_type __e,
   1985                            ios_base::iostate& __err,
   1986                            const ctype<char_type>& __ct) const;
   1987     void __get_monthname(int& __m,
   1988                          iter_type& __b, iter_type __e,
   1989                          ios_base::iostate& __err,
   1990                          const ctype<char_type>& __ct) const;
   1991     void __get_day(int& __d,
   1992                    iter_type& __b, iter_type __e,
   1993                    ios_base::iostate& __err,
   1994                    const ctype<char_type>& __ct) const;
   1995     void __get_month(int& __m,
   1996                      iter_type& __b, iter_type __e,
   1997                      ios_base::iostate& __err,
   1998                      const ctype<char_type>& __ct) const;
   1999     void __get_year(int& __y,
   2000                    iter_type& __b, iter_type __e,
   2001                    ios_base::iostate& __err,
   2002                    const ctype<char_type>& __ct) const;
   2003     void __get_year4(int& __y,
   2004                     iter_type& __b, iter_type __e,
   2005                     ios_base::iostate& __err,
   2006                     const ctype<char_type>& __ct) const;
   2007     void __get_hour(int& __d,
   2008                     iter_type& __b, iter_type __e,
   2009                     ios_base::iostate& __err,
   2010                     const ctype<char_type>& __ct) const;
   2011     void __get_12_hour(int& __h,
   2012                        iter_type& __b, iter_type __e,
   2013                        ios_base::iostate& __err,
   2014                        const ctype<char_type>& __ct) const;
   2015     void __get_am_pm(int& __h,
   2016                      iter_type& __b, iter_type __e,
   2017                      ios_base::iostate& __err,
   2018                      const ctype<char_type>& __ct) const;
   2019     void __get_minute(int& __m,
   2020                       iter_type& __b, iter_type __e,
   2021                       ios_base::iostate& __err,
   2022                       const ctype<char_type>& __ct) const;
   2023     void __get_second(int& __s,
   2024                       iter_type& __b, iter_type __e,
   2025                       ios_base::iostate& __err,
   2026                       const ctype<char_type>& __ct) const;
   2027     void __get_weekday(int& __w,
   2028                        iter_type& __b, iter_type __e,
   2029                        ios_base::iostate& __err,
   2030                        const ctype<char_type>& __ct) const;
   2031     void __get_day_year_num(int& __w,
   2032                             iter_type& __b, iter_type __e,
   2033                             ios_base::iostate& __err,
   2034                             const ctype<char_type>& __ct) const;
   2035 };
   2036 
   2037 template <class _CharT, class _InputIterator>
   2038 locale::id
   2039 time_get<_CharT, _InputIterator>::id;
   2040 
   2041 // time_get primitives
   2042 
   2043 template <class _CharT, class _InputIterator>
   2044 void
   2045 time_get<_CharT, _InputIterator>::__get_weekdayname(int& __w,
   2046                                                     iter_type& __b, iter_type __e,
   2047                                                     ios_base::iostate& __err,
   2048                                                     const ctype<char_type>& __ct) const
   2049 {
   2050     // Note:  ignoring case comes from the POSIX strptime spec
   2051     const string_type* __wk = this->__weeks();
   2052     ptrdiff_t __i = __scan_keyword(__b, __e, __wk, __wk+14, __ct, __err, false) - __wk;
   2053     if (__i < 14)
   2054         __w = __i % 7;
   2055 }
   2056 
   2057 template <class _CharT, class _InputIterator>
   2058 void
   2059 time_get<_CharT, _InputIterator>::__get_monthname(int& __m,
   2060                                                   iter_type& __b, iter_type __e,
   2061                                                   ios_base::iostate& __err,
   2062                                                   const ctype<char_type>& __ct) const
   2063 {
   2064     // Note:  ignoring case comes from the POSIX strptime spec
   2065     const string_type* __month = this->__months();
   2066     ptrdiff_t __i = __scan_keyword(__b, __e, __month, __month+24, __ct, __err, false) - __month;
   2067     if (__i < 24)
   2068         __m = __i % 12;
   2069 }
   2070 
   2071 template <class _CharT, class _InputIterator>
   2072 void
   2073 time_get<_CharT, _InputIterator>::__get_day(int& __d,
   2074                                             iter_type& __b, iter_type __e,
   2075                                             ios_base::iostate& __err,
   2076                                             const ctype<char_type>& __ct) const
   2077 {
   2078     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
   2079     if (!(__err & ios_base::failbit) && 1 <= __t && __t <= 31)
   2080         __d = __t;
   2081     else
   2082         __err |= ios_base::failbit;
   2083 }
   2084 
   2085 template <class _CharT, class _InputIterator>
   2086 void
   2087 time_get<_CharT, _InputIterator>::__get_month(int& __m,
   2088                                               iter_type& __b, iter_type __e,
   2089                                               ios_base::iostate& __err,
   2090                                               const ctype<char_type>& __ct) const
   2091 {
   2092     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2) - 1;
   2093     if (!(__err & ios_base::failbit) && __t <= 11)
   2094         __m = __t;
   2095     else
   2096         __err |= ios_base::failbit;
   2097 }
   2098 
   2099 template <class _CharT, class _InputIterator>
   2100 void
   2101 time_get<_CharT, _InputIterator>::__get_year(int& __y,
   2102                                              iter_type& __b, iter_type __e,
   2103                                              ios_base::iostate& __err,
   2104                                              const ctype<char_type>& __ct) const
   2105 {
   2106     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 4);
   2107     if (!(__err & ios_base::failbit))
   2108     {
   2109         if (__t < 69)
   2110             __t += 2000;
   2111         else if (69 <= __t && __t <= 99)
   2112             __t += 1900;
   2113         __y = __t - 1900;
   2114     }
   2115 }
   2116 
   2117 template <class _CharT, class _InputIterator>
   2118 void
   2119 time_get<_CharT, _InputIterator>::__get_year4(int& __y,
   2120                                               iter_type& __b, iter_type __e,
   2121                                               ios_base::iostate& __err,
   2122                                               const ctype<char_type>& __ct) const
   2123 {
   2124     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 4);
   2125     if (!(__err & ios_base::failbit))
   2126         __y = __t - 1900;
   2127 }
   2128 
   2129 template <class _CharT, class _InputIterator>
   2130 void
   2131 time_get<_CharT, _InputIterator>::__get_hour(int& __h,
   2132                                              iter_type& __b, iter_type __e,
   2133                                              ios_base::iostate& __err,
   2134                                              const ctype<char_type>& __ct) const
   2135 {
   2136     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
   2137     if (!(__err & ios_base::failbit) && __t <= 23)
   2138         __h = __t;
   2139     else
   2140         __err |= ios_base::failbit;
   2141 }
   2142 
   2143 template <class _CharT, class _InputIterator>
   2144 void
   2145 time_get<_CharT, _InputIterator>::__get_12_hour(int& __h,
   2146                                                 iter_type& __b, iter_type __e,
   2147                                                 ios_base::iostate& __err,
   2148                                                 const ctype<char_type>& __ct) const
   2149 {
   2150     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
   2151     if (!(__err & ios_base::failbit) && 1 <= __t && __t <= 12)
   2152         __h = __t;
   2153     else
   2154         __err |= ios_base::failbit;
   2155 }
   2156 
   2157 template <class _CharT, class _InputIterator>
   2158 void
   2159 time_get<_CharT, _InputIterator>::__get_minute(int& __m,
   2160                                                iter_type& __b, iter_type __e,
   2161                                                ios_base::iostate& __err,
   2162                                                const ctype<char_type>& __ct) const
   2163 {
   2164     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
   2165     if (!(__err & ios_base::failbit) && __t <= 59)
   2166         __m = __t;
   2167     else
   2168         __err |= ios_base::failbit;
   2169 }
   2170 
   2171 template <class _CharT, class _InputIterator>
   2172 void
   2173 time_get<_CharT, _InputIterator>::__get_second(int& __s,
   2174                                                iter_type& __b, iter_type __e,
   2175                                                ios_base::iostate& __err,
   2176                                                const ctype<char_type>& __ct) const
   2177 {
   2178     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
   2179     if (!(__err & ios_base::failbit) && __t <= 60)
   2180         __s = __t;
   2181     else
   2182         __err |= ios_base::failbit;
   2183 }
   2184 
   2185 template <class _CharT, class _InputIterator>
   2186 void
   2187 time_get<_CharT, _InputIterator>::__get_weekday(int& __w,
   2188                                                 iter_type& __b, iter_type __e,
   2189                                                 ios_base::iostate& __err,
   2190                                                 const ctype<char_type>& __ct) const
   2191 {
   2192     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 1);
   2193     if (!(__err & ios_base::failbit) && __t <= 6)
   2194         __w = __t;
   2195     else
   2196         __err |= ios_base::failbit;
   2197 }
   2198 
   2199 template <class _CharT, class _InputIterator>
   2200 void
   2201 time_get<_CharT, _InputIterator>::__get_day_year_num(int& __d,
   2202                                                      iter_type& __b, iter_type __e,
   2203                                                      ios_base::iostate& __err,
   2204                                                      const ctype<char_type>& __ct) const
   2205 {
   2206     int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 3);
   2207     if (!(__err & ios_base::failbit) && __t <= 365)
   2208         __d = __t;
   2209     else
   2210         __err |= ios_base::failbit;
   2211 }
   2212 
   2213 template <class _CharT, class _InputIterator>
   2214 void
   2215 time_get<_CharT, _InputIterator>::__get_white_space(iter_type& __b, iter_type __e,
   2216                                                     ios_base::iostate& __err,
   2217                                                     const ctype<char_type>& __ct) const
   2218 {
   2219     for (; __b != __e && __ct.is(ctype_base::space, *__b); ++__b)
   2220         ;
   2221     if (__b == __e)
   2222         __err |= ios_base::eofbit;
   2223 }
   2224 
   2225 template <class _CharT, class _InputIterator>
   2226 void
   2227 time_get<_CharT, _InputIterator>::__get_am_pm(int& __h,
   2228                                               iter_type& __b, iter_type __e,
   2229                                               ios_base::iostate& __err,
   2230                                               const ctype<char_type>& __ct) const
   2231 {
   2232     const string_type* __ap = this->__am_pm();
   2233     if (__ap[0].size() + __ap[1].size() == 0)
   2234     {
   2235         __err |= ios_base::failbit;
   2236         return;
   2237     }
   2238     ptrdiff_t __i = __scan_keyword(__b, __e, __ap, __ap+2, __ct, __err, false) - __ap;
   2239     if (__i == 0 && __h == 12)
   2240         __h = 0;
   2241     else if (__i == 1 && __h < 12)
   2242         __h += 12;
   2243 }
   2244 
   2245 template <class _CharT, class _InputIterator>
   2246 void
   2247 time_get<_CharT, _InputIterator>::__get_percent(iter_type& __b, iter_type __e,
   2248                                                 ios_base::iostate& __err,
   2249                                                 const ctype<char_type>& __ct) const
   2250 {
   2251     if (__b == __e)
   2252     {
   2253         __err |= ios_base::eofbit | ios_base::failbit;
   2254         return;
   2255     }
   2256     if (__ct.narrow(*__b, 0) != '%')
   2257         __err |= ios_base::failbit;
   2258     else if(++__b == __e)
   2259         __err |= ios_base::eofbit;
   2260 }
   2261 
   2262 // time_get end primitives
   2263 
   2264 template <class _CharT, class _InputIterator>
   2265 _InputIterator
   2266 time_get<_CharT, _InputIterator>::get(iter_type __b, iter_type __e,
   2267                                       ios_base& __iob,
   2268                                       ios_base::iostate& __err, tm* __tm,
   2269                                       const char_type* __fmtb, const char_type* __fmte) const
   2270 {
   2271     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   2272     __err = ios_base::goodbit;
   2273     while (__fmtb != __fmte && __err == ios_base::goodbit)
   2274     {
   2275         if (__b == __e)
   2276         {
   2277             __err = ios_base::failbit;
   2278             break;
   2279         }
   2280         if (__ct.narrow(*__fmtb, 0) == '%')
   2281         {
   2282             if (++__fmtb == __fmte)
   2283             {
   2284                 __err = ios_base::failbit;
   2285                 break;
   2286             }
   2287             char __cmd = __ct.narrow(*__fmtb, 0);
   2288             char __opt = '\0';
   2289             if (__cmd == 'E' || __cmd == '0')
   2290             {
   2291                 if (++__fmtb == __fmte)
   2292                 {
   2293                     __err = ios_base::failbit;
   2294                     break;
   2295                 }
   2296                 __opt = __cmd;
   2297                 __cmd = __ct.narrow(*__fmtb, 0);
   2298             }
   2299             __b = do_get(__b, __e, __iob, __err, __tm, __cmd, __opt);
   2300             ++__fmtb;
   2301         }
   2302         else if (__ct.is(ctype_base::space, *__fmtb))
   2303         {
   2304             for (++__fmtb; __fmtb != __fmte && __ct.is(ctype_base::space, *__fmtb); ++__fmtb)
   2305                 ;
   2306             for (        ;    __b != __e    && __ct.is(ctype_base::space, *__b);    ++__b)
   2307                 ;
   2308         }
   2309         else if (__ct.toupper(*__b) == __ct.toupper(*__fmtb))
   2310         {
   2311             ++__b;
   2312             ++__fmtb;
   2313         }
   2314         else
   2315             __err = ios_base::failbit;
   2316     }
   2317     if (__b == __e)
   2318         __err |= ios_base::eofbit;
   2319     return __b;
   2320 }
   2321 
   2322 template <class _CharT, class _InputIterator>
   2323 typename time_get<_CharT, _InputIterator>::dateorder
   2324 time_get<_CharT, _InputIterator>::do_date_order() const
   2325 {
   2326     return mdy;
   2327 }
   2328 
   2329 template <class _CharT, class _InputIterator>
   2330 _InputIterator
   2331 time_get<_CharT, _InputIterator>::do_get_time(iter_type __b, iter_type __e,
   2332                                               ios_base& __iob,
   2333                                               ios_base::iostate& __err,
   2334                                               tm* __tm) const
   2335 {
   2336     const char_type __fmt[] = {'%', 'H', ':', '%', 'M', ':', '%', 'S'};
   2337     return get(__b, __e, __iob, __err, __tm, __fmt, __fmt + sizeof(__fmt)/sizeof(__fmt[0]));
   2338 }
   2339 
   2340 template <class _CharT, class _InputIterator>
   2341 _InputIterator
   2342 time_get<_CharT, _InputIterator>::do_get_date(iter_type __b, iter_type __e,
   2343                                               ios_base& __iob,
   2344                                               ios_base::iostate& __err,
   2345                                               tm* __tm) const
   2346 {
   2347     const string_type& __fmt = this->__x();
   2348     return get(__b, __e, __iob, __err, __tm, __fmt.data(), __fmt.data() + __fmt.size());
   2349 }
   2350 
   2351 template <class _CharT, class _InputIterator>
   2352 _InputIterator
   2353 time_get<_CharT, _InputIterator>::do_get_weekday(iter_type __b, iter_type __e,
   2354                                                  ios_base& __iob,
   2355                                                  ios_base::iostate& __err,
   2356                                                  tm* __tm) const
   2357 {
   2358     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   2359     __get_weekdayname(__tm->tm_wday, __b, __e, __err, __ct);
   2360     return __b;
   2361 }
   2362 
   2363 template <class _CharT, class _InputIterator>
   2364 _InputIterator
   2365 time_get<_CharT, _InputIterator>::do_get_monthname(iter_type __b, iter_type __e,
   2366                                                    ios_base& __iob,
   2367                                                    ios_base::iostate& __err,
   2368                                                    tm* __tm) const
   2369 {
   2370     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   2371     __get_monthname(__tm->tm_mon, __b, __e, __err, __ct);
   2372     return __b;
   2373 }
   2374 
   2375 template <class _CharT, class _InputIterator>
   2376 _InputIterator
   2377 time_get<_CharT, _InputIterator>::do_get_year(iter_type __b, iter_type __e,
   2378                                               ios_base& __iob,
   2379                                               ios_base::iostate& __err,
   2380                                               tm* __tm) const
   2381 {
   2382     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   2383     __get_year(__tm->tm_year, __b, __e, __err, __ct);
   2384     return __b;
   2385 }
   2386 
   2387 template <class _CharT, class _InputIterator>
   2388 _InputIterator
   2389 time_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
   2390                                          ios_base& __iob,
   2391                                          ios_base::iostate& __err, tm* __tm,
   2392                                          char __fmt, char) const
   2393 {
   2394     __err = ios_base::goodbit;
   2395     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   2396     switch (__fmt)
   2397     {
   2398     case 'a':
   2399     case 'A':
   2400         __get_weekdayname(__tm->tm_wday, __b, __e, __err, __ct);
   2401         break;
   2402     case 'b':
   2403     case 'B':
   2404     case 'h':
   2405         __get_monthname(__tm->tm_mon, __b, __e, __err, __ct);
   2406         break;
   2407     case 'c':
   2408         {
   2409         const string_type& __fm = this->__c();
   2410         __b = get(__b, __e, __iob, __err, __tm, __fm.data(), __fm.data() + __fm.size());
   2411         }
   2412         break;
   2413     case 'd':
   2414     case 'e':
   2415         __get_day(__tm->tm_mday, __b, __e, __err, __ct);
   2416         break;
   2417     case 'D':
   2418         {
   2419         const char_type __fm[] = {'%', 'm', '/', '%', 'd', '/', '%', 'y'};
   2420         __b = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm)/sizeof(__fm[0]));
   2421         }
   2422         break;
   2423     case 'F':
   2424         {
   2425         const char_type __fm[] = {'%', 'Y', '-', '%', 'm', '-', '%', 'd'};
   2426         __b = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm)/sizeof(__fm[0]));
   2427         }
   2428         break;
   2429     case 'H':
   2430         __get_hour(__tm->tm_hour, __b, __e, __err, __ct);
   2431         break;
   2432     case 'I':
   2433         __get_12_hour(__tm->tm_hour, __b, __e, __err, __ct);
   2434         break;
   2435     case 'j':
   2436         __get_day_year_num(__tm->tm_yday, __b, __e, __err, __ct);
   2437         break;
   2438     case 'm':
   2439         __get_month(__tm->tm_mon, __b, __e, __err, __ct);
   2440         break;
   2441     case 'M':
   2442         __get_minute(__tm->tm_min, __b, __e, __err, __ct);
   2443         break;
   2444     case 'n':
   2445     case 't':
   2446         __get_white_space(__b, __e, __err, __ct);
   2447         break;
   2448     case 'p':
   2449         __get_am_pm(__tm->tm_hour, __b, __e, __err, __ct);
   2450         break;
   2451     case 'r':
   2452         {
   2453         const char_type __fm[] = {'%', 'I', ':', '%', 'M', ':', '%', 'S', ' ', '%', 'p'};
   2454         __b = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm)/sizeof(__fm[0]));
   2455         }
   2456         break;
   2457     case 'R':
   2458         {
   2459         const char_type __fm[] = {'%', 'H', ':', '%', 'M'};
   2460         __b = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm)/sizeof(__fm[0]));
   2461         }
   2462         break;
   2463     case 'S':
   2464         __get_second(__tm->tm_sec, __b, __e, __err, __ct);
   2465         break;
   2466     case 'T':
   2467         {
   2468         const char_type __fm[] = {'%', 'H', ':', '%', 'M', ':', '%', 'S'};
   2469         __b = get(__b, __e, __iob, __err, __tm, __fm, __fm + sizeof(__fm)/sizeof(__fm[0]));
   2470         }
   2471         break;
   2472     case 'w':
   2473         __get_weekday(__tm->tm_wday, __b, __e, __err, __ct);
   2474         break;
   2475     case 'x':
   2476         return do_get_date(__b, __e, __iob, __err, __tm);
   2477     case 'X':
   2478         {
   2479         const string_type& __fm = this->__X();
   2480         __b = get(__b, __e, __iob, __err, __tm, __fm.data(), __fm.data() + __fm.size());
   2481         }
   2482         break;
   2483     case 'y':
   2484         __get_year(__tm->tm_year, __b, __e, __err, __ct);
   2485         break;
   2486     case 'Y':
   2487         __get_year4(__tm->tm_year, __b, __e, __err, __ct);
   2488         break;
   2489     case '%':
   2490         __get_percent(__b, __e, __err, __ct);
   2491         break;
   2492     default:
   2493         __err |= ios_base::failbit;
   2494     }
   2495     return __b;
   2496 }
   2497 
   2498 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_get<char>)
   2499 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_get<wchar_t>)
   2500 
   2501 class _LIBCPP_TYPE_VIS __time_get
   2502 {
   2503 protected:
   2504     locale_t __loc_;
   2505 
   2506     __time_get(const char* __nm);
   2507     __time_get(const string& __nm);
   2508     ~__time_get();
   2509 };
   2510 
   2511 template <class _CharT>
   2512 class _LIBCPP_TYPE_VIS __time_get_storage
   2513     : public __time_get
   2514 {
   2515 protected:
   2516     typedef basic_string<_CharT> string_type;
   2517 
   2518     string_type __weeks_[14];
   2519     string_type __months_[24];
   2520     string_type __am_pm_[2];
   2521     string_type __c_;
   2522     string_type __r_;
   2523     string_type __x_;
   2524     string_type __X_;
   2525 
   2526     explicit __time_get_storage(const char* __nm);
   2527     explicit __time_get_storage(const string& __nm);
   2528 
   2529     _LIBCPP_ALWAYS_INLINE ~__time_get_storage() {}
   2530 
   2531     time_base::dateorder __do_date_order() const;
   2532 
   2533 private:
   2534     void init(const ctype<_CharT>&);
   2535     string_type __analyze(char __fmt, const ctype<_CharT>&);
   2536 };
   2537 
   2538 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
   2539 class _LIBCPP_TYPE_VIS_ONLY time_get_byname
   2540     : public time_get<_CharT, _InputIterator>,
   2541       private __time_get_storage<_CharT>
   2542 {
   2543 public:
   2544     typedef time_base::dateorder    dateorder;
   2545     typedef _InputIterator          iter_type;
   2546     typedef _CharT                  char_type;
   2547     typedef basic_string<char_type> string_type;
   2548 
   2549     _LIBCPP_INLINE_VISIBILITY
   2550     explicit time_get_byname(const char* __nm, size_t __refs = 0)
   2551         : time_get<_CharT, _InputIterator>(__refs),
   2552           __time_get_storage<_CharT>(__nm) {}
   2553     _LIBCPP_INLINE_VISIBILITY
   2554     explicit time_get_byname(const string& __nm, size_t __refs = 0)
   2555         : time_get<_CharT, _InputIterator>(__refs),
   2556           __time_get_storage<_CharT>(__nm) {}
   2557 
   2558 protected:
   2559     _LIBCPP_INLINE_VISIBILITY
   2560     ~time_get_byname() {}
   2561 
   2562     _LIBCPP_INLINE_VISIBILITY
   2563     virtual dateorder do_date_order() const {return this->__do_date_order();}
   2564 private:
   2565     _LIBCPP_INLINE_VISIBILITY
   2566     virtual const string_type* __weeks() const  {return this->__weeks_;}
   2567     _LIBCPP_INLINE_VISIBILITY
   2568     virtual const string_type* __months() const {return this->__months_;}
   2569     _LIBCPP_INLINE_VISIBILITY
   2570     virtual const string_type* __am_pm() const  {return this->__am_pm_;}
   2571     _LIBCPP_INLINE_VISIBILITY
   2572     virtual const string_type& __c() const      {return this->__c_;}
   2573     _LIBCPP_INLINE_VISIBILITY
   2574     virtual const string_type& __r() const      {return this->__r_;}
   2575     _LIBCPP_INLINE_VISIBILITY
   2576     virtual const string_type& __x() const      {return this->__x_;}
   2577     _LIBCPP_INLINE_VISIBILITY
   2578     virtual const string_type& __X() const      {return this->__X_;}
   2579 };
   2580 
   2581 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_get_byname<char>)
   2582 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_get_byname<wchar_t>)
   2583 
   2584 class _LIBCPP_TYPE_VIS __time_put
   2585 {
   2586     locale_t __loc_;
   2587 protected:
   2588     _LIBCPP_ALWAYS_INLINE __time_put() : __loc_(_LIBCPP_GET_C_LOCALE) {}
   2589     __time_put(const char* __nm);
   2590     __time_put(const string& __nm);
   2591     ~__time_put();
   2592     void __do_put(char* __nb, char*& __ne, const tm* __tm,
   2593                   char __fmt, char __mod) const;
   2594     void __do_put(wchar_t* __wb, wchar_t*& __we, const tm* __tm,
   2595                   char __fmt, char __mod) const;
   2596 };
   2597 
   2598 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
   2599 class _LIBCPP_TYPE_VIS_ONLY time_put
   2600     : public locale::facet,
   2601       private __time_put
   2602 {
   2603 public:
   2604     typedef _CharT char_type;
   2605     typedef _OutputIterator iter_type;
   2606 
   2607     _LIBCPP_ALWAYS_INLINE
   2608     explicit time_put(size_t __refs = 0)
   2609         : locale::facet(__refs) {}
   2610 
   2611     iter_type put(iter_type __s, ios_base& __iob, char_type __fl, const tm* __tm,
   2612                   const char_type* __pb, const char_type* __pe) const;
   2613 
   2614     _LIBCPP_ALWAYS_INLINE
   2615     iter_type put(iter_type __s, ios_base& __iob, char_type __fl,
   2616                   const tm* __tm, char __fmt, char __mod = 0) const
   2617     {
   2618         return do_put(__s, __iob, __fl, __tm, __fmt, __mod);
   2619     }
   2620 
   2621     static locale::id id;
   2622 
   2623 protected:
   2624     _LIBCPP_ALWAYS_INLINE
   2625     ~time_put() {}
   2626     virtual iter_type do_put(iter_type __s, ios_base&, char_type, const tm* __tm,
   2627                              char __fmt, char __mod) const;
   2628 
   2629     _LIBCPP_ALWAYS_INLINE
   2630     explicit time_put(const char* __nm, size_t __refs)
   2631         : locale::facet(__refs),
   2632           __time_put(__nm) {}
   2633     _LIBCPP_ALWAYS_INLINE
   2634     explicit time_put(const string& __nm, size_t __refs)
   2635         : locale::facet(__refs),
   2636           __time_put(__nm) {}
   2637 };
   2638 
   2639 template <class _CharT, class _OutputIterator>
   2640 locale::id
   2641 time_put<_CharT, _OutputIterator>::id;
   2642 
   2643 template <class _CharT, class _OutputIterator>
   2644 _OutputIterator
   2645 time_put<_CharT, _OutputIterator>::put(iter_type __s, ios_base& __iob,
   2646                                        char_type __fl, const tm* __tm,
   2647                                        const char_type* __pb,
   2648                                        const char_type* __pe) const
   2649 {
   2650     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
   2651     for (; __pb != __pe; ++__pb)
   2652     {
   2653         if (__ct.narrow(*__pb, 0) == '%')
   2654         {
   2655             if (++__pb == __pe)
   2656             {
   2657                 *__s++ = __pb[-1];
   2658                 break;
   2659             }
   2660             char __mod = 0;
   2661             char __fmt = __ct.narrow(*__pb, 0);
   2662             if (__fmt == 'E' || __fmt == 'O')
   2663             {
   2664                 if (++__pb == __pe)
   2665                 {
   2666                     *__s++ = __pb[-2];
   2667                     *__s++ = __pb[-1];
   2668                     break;
   2669                 }
   2670                 __mod = __fmt;
   2671                 __fmt = __ct.narrow(*__pb, 0);
   2672             }
   2673             __s = do_put(__s, __iob, __fl, __tm, __fmt, __mod);
   2674         }
   2675         else
   2676             *__s++ = *__pb;
   2677     }
   2678     return __s;
   2679 }
   2680 
   2681 template <class _CharT, class _OutputIterator>
   2682 _OutputIterator
   2683 time_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base&,
   2684                                           char_type, const tm* __tm,
   2685                                           char __fmt, char __mod) const
   2686 {
   2687     char_type __nar[100];
   2688     char_type* __nb = __nar;
   2689     char_type* __ne = __nb + 100;
   2690     __do_put(__nb, __ne, __tm, __fmt, __mod);
   2691     return _VSTD::copy(__nb, __ne, __s);
   2692 }
   2693 
   2694 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_put<char>)
   2695 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_put<wchar_t>)
   2696 
   2697 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
   2698 class _LIBCPP_TYPE_VIS_ONLY time_put_byname
   2699     : public time_put<_CharT, _OutputIterator>
   2700 {
   2701 public:
   2702     _LIBCPP_ALWAYS_INLINE
   2703     explicit time_put_byname(const char* __nm, size_t __refs = 0)
   2704         : time_put<_CharT, _OutputIterator>(__nm, __refs) {}
   2705 
   2706     _LIBCPP_ALWAYS_INLINE
   2707     explicit time_put_byname(const string& __nm, size_t __refs = 0)
   2708         : time_put<_CharT, _OutputIterator>(__nm, __refs) {}
   2709 
   2710 protected:
   2711     _LIBCPP_ALWAYS_INLINE
   2712     ~time_put_byname() {}
   2713 };
   2714 
   2715 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_put_byname<char>)
   2716 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS time_put_byname<wchar_t>)
   2717 
   2718 // money_base
   2719 
   2720 class _LIBCPP_TYPE_VIS money_base
   2721 {
   2722 public:
   2723     enum part {none, space, symbol, sign, value};
   2724     struct pattern {char field[4];};
   2725 
   2726     _LIBCPP_ALWAYS_INLINE money_base() {}
   2727 };
   2728 
   2729 // moneypunct
   2730 
   2731 template <class _CharT, bool _International = false>
   2732 class _LIBCPP_TYPE_VIS_ONLY moneypunct
   2733     : public locale::facet,
   2734       public money_base
   2735 {
   2736 public:
   2737     typedef _CharT                  char_type;
   2738     typedef basic_string<char_type> string_type;
   2739 
   2740     _LIBCPP_ALWAYS_INLINE
   2741     explicit moneypunct(size_t __refs = 0)
   2742         : locale::facet(__refs) {}
   2743 
   2744     _LIBCPP_ALWAYS_INLINE char_type   decimal_point() const {return do_decimal_point();}
   2745     _LIBCPP_ALWAYS_INLINE char_type   thousands_sep() const {return do_thousands_sep();}
   2746     _LIBCPP_ALWAYS_INLINE string      grouping()      const {return do_grouping();}
   2747     _LIBCPP_ALWAYS_INLINE string_type curr_symbol()   const {return do_curr_symbol();}
   2748     _LIBCPP_ALWAYS_INLINE string_type positive_sign() const {return do_positive_sign();}
   2749     _LIBCPP_ALWAYS_INLINE string_type negative_sign() const {return do_negative_sign();}
   2750     _LIBCPP_ALWAYS_INLINE int         frac_digits()   const {return do_frac_digits();}
   2751     _LIBCPP_ALWAYS_INLINE pattern     pos_format()    const {return do_pos_format();}
   2752     _LIBCPP_ALWAYS_INLINE pattern     neg_format()    const {return do_neg_format();}
   2753 
   2754     static locale::id id;
   2755     static const bool intl = _International;
   2756 
   2757 protected:
   2758     _LIBCPP_ALWAYS_INLINE
   2759     ~moneypunct() {}
   2760 
   2761     virtual char_type   do_decimal_point() const {return numeric_limits<char_type>::max();}
   2762     virtual char_type   do_thousands_sep() const {return numeric_limits<char_type>::max();}
   2763     virtual string      do_grouping()      const {return string();}
   2764     virtual string_type do_curr_symbol()   const {return string_type();}
   2765     virtual string_type do_positive_sign() const {return string_type();}
   2766     virtual string_type do_negative_sign() const {return string_type(1, '-');}
   2767     virtual int         do_frac_digits()   const {return 0;}
   2768     virtual pattern     do_pos_format()    const
   2769         {pattern __p = {{symbol, sign, none, value}}; return __p;}
   2770     virtual pattern     do_neg_format()    const
   2771         {pattern __p = {{symbol, sign, none, value}}; return __p;}
   2772 };
   2773 
   2774 template <class _CharT, bool _International>
   2775 locale::id
   2776 moneypunct<_CharT, _International>::id;
   2777 
   2778 template <class _CharT, bool _International>
   2779 const bool
   2780 moneypunct<_CharT, _International>::intl;
   2781 
   2782 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct<char, false>)
   2783 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct<char, true>)
   2784 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct<wchar_t, false>)
   2785 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct<wchar_t, true>)
   2786 
   2787 // moneypunct_byname
   2788 
   2789 template <class _CharT, bool _International = false>
   2790 class _LIBCPP_TYPE_VIS_ONLY moneypunct_byname
   2791     : public moneypunct<_CharT, _International>
   2792 {
   2793 public:
   2794     typedef money_base::pattern  pattern;
   2795     typedef _CharT                  char_type;
   2796     typedef basic_string<char_type> string_type;
   2797 
   2798     _LIBCPP_ALWAYS_INLINE
   2799     explicit moneypunct_byname(const char* __nm, size_t __refs = 0)
   2800         : moneypunct<_CharT, _International>(__refs) {init(__nm);}
   2801 
   2802     _LIBCPP_ALWAYS_INLINE_EXCEPT_GCC49
   2803     explicit moneypunct_byname(const string& __nm, size_t __refs = 0)
   2804         : moneypunct<_CharT, _International>(__refs) {init(__nm.c_str());}
   2805 
   2806 protected:
   2807     _LIBCPP_ALWAYS_INLINE
   2808     ~moneypunct_byname() {}
   2809 
   2810     virtual char_type   do_decimal_point() const {return __decimal_point_;}
   2811     virtual char_type   do_thousands_sep() const {return __thousands_sep_;}
   2812     virtual string      do_grouping()      const {return __grouping_;}
   2813     virtual string_type do_curr_symbol()   const {return __curr_symbol_;}
   2814     virtual string_type do_positive_sign() const {return __positive_sign_;}
   2815     virtual string_type do_negative_sign() const {return __negative_sign_;}
   2816     virtual int         do_frac_digits()   const {return __frac_digits_;}
   2817     virtual pattern     do_pos_format()    const {return __pos_format_;}
   2818     virtual pattern     do_neg_format()    const {return __neg_format_;}
   2819 
   2820 private:
   2821     char_type   __decimal_point_;
   2822     char_type   __thousands_sep_;
   2823     string      __grouping_;
   2824     string_type __curr_symbol_;
   2825     string_type __positive_sign_;
   2826     string_type __negative_sign_;
   2827     int         __frac_digits_;
   2828     pattern     __pos_format_;
   2829     pattern     __neg_format_;
   2830 
   2831     void init(const char*);
   2832 };
   2833 
   2834 template<> void moneypunct_byname<char, false>::init(const char*);
   2835 template<> void moneypunct_byname<char, true>::init(const char*);
   2836 template<> void moneypunct_byname<wchar_t, false>::init(const char*);
   2837 template<> void moneypunct_byname<wchar_t, true>::init(const char*);
   2838 
   2839 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct_byname<char, false>)
   2840 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct_byname<char, true>)
   2841 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct_byname<wchar_t, false>)
   2842 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS moneypunct_byname<wchar_t, true>)
   2843 
   2844 // money_get
   2845 
   2846 template <class _CharT>
   2847 class __money_get
   2848 {
   2849 protected:
   2850     typedef _CharT                  char_type;
   2851     typedef basic_string<char_type> string_type;
   2852 
   2853     _LIBCPP_ALWAYS_INLINE __money_get() {}
   2854 
   2855     static void __gather_info(bool __intl, const locale& __loc,
   2856                               money_base::pattern& __pat, char_type& __dp,
   2857                               char_type& __ts, string& __grp,
   2858                               string_type& __sym, string_type& __psn,
   2859                               string_type& __nsn, int& __fd);
   2860 };
   2861 
   2862 template <class _CharT>
   2863 void
   2864 __money_get<_CharT>::__gather_info(bool __intl, const locale& __loc,
   2865                                    money_base::pattern& __pat, char_type& __dp,
   2866                                    char_type& __ts, string& __grp,
   2867                                    string_type& __sym, string_type& __psn,
   2868                                    string_type& __nsn, int& __fd)
   2869 {
   2870     if (__intl)
   2871     {
   2872         const moneypunct<char_type, true>& __mp =
   2873             use_facet<moneypunct<char_type, true> >(__loc);
   2874         __pat = __mp.neg_format();
   2875         __nsn = __mp.negative_sign();
   2876         __psn = __mp.positive_sign();
   2877         __dp = __mp.decimal_point();
   2878         __ts = __mp.thousands_sep();
   2879         __grp = __mp.grouping();
   2880         __sym = __mp.curr_symbol();
   2881         __fd = __mp.frac_digits();
   2882     }
   2883     else
   2884     {
   2885         const moneypunct<char_type, false>& __mp =
   2886             use_facet<moneypunct<char_type, false> >(__loc);
   2887         __pat = __mp.neg_format();
   2888         __nsn = __mp.negative_sign();
   2889         __psn = __mp.positive_sign();
   2890         __dp = __mp.decimal_point();
   2891         __ts = __mp.thousands_sep();
   2892         __grp = __mp.grouping();
   2893         __sym = __mp.curr_symbol();
   2894         __fd = __mp.frac_digits();
   2895     }
   2896 }
   2897 
   2898 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS __money_get<char>)
   2899 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS __money_get<wchar_t>)
   2900 
   2901 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
   2902 class _LIBCPP_TYPE_VIS_ONLY money_get
   2903     : public locale::facet,
   2904       private __money_get<_CharT>
   2905 {
   2906 public:
   2907     typedef _CharT                  char_type;
   2908     typedef _InputIterator          iter_type;
   2909     typedef basic_string<char_type> string_type;
   2910 
   2911     _LIBCPP_ALWAYS_INLINE
   2912     explicit money_get(size_t __refs = 0)
   2913         : locale::facet(__refs) {}
   2914 
   2915     _LIBCPP_ALWAYS_INLINE
   2916     iter_type get(iter_type __b, iter_type __e, bool __intl, ios_base& __iob,
   2917                   ios_base::iostate& __err, long double& __v) const
   2918     {
   2919         return do_get(__b, __e, __intl, __iob, __err, __v);
   2920     }
   2921 
   2922     _LIBCPP_ALWAYS_INLINE
   2923     iter_type get(iter_type __b, iter_type __e, bool __intl, ios_base& __iob,
   2924                   ios_base::iostate& __err, string_type& __v) const
   2925     {
   2926         return do_get(__b, __e, __intl, __iob, __err, __v);
   2927     }
   2928 
   2929     static locale::id id;
   2930 
   2931 protected:
   2932 
   2933     _LIBCPP_ALWAYS_INLINE
   2934     ~money_get() {}
   2935 
   2936     virtual iter_type do_get(iter_type __b, iter_type __e, bool __intl,
   2937                              ios_base& __iob, ios_base::iostate& __err,
   2938                              long double& __v) const;
   2939     virtual iter_type do_get(iter_type __b, iter_type __e, bool __intl,
   2940                              ios_base& __iob, ios_base::iostate& __err,
   2941                              string_type& __v) const;
   2942 
   2943 private:
   2944     static bool __do_get(iter_type& __b, iter_type __e,
   2945                          bool __intl, const locale& __loc,
   2946                          ios_base::fmtflags __flags, ios_base::iostate& __err,
   2947                          bool& __neg, const ctype<char_type>& __ct,
   2948                          unique_ptr<char_type, void(*)(void*)>& __wb,
   2949                          char_type*& __wn, char_type* __we);
   2950 };
   2951 
   2952 template <class _CharT, class _InputIterator>
   2953 locale::id
   2954 money_get<_CharT, _InputIterator>::id;
   2955 
   2956 _LIBCPP_FUNC_VIS void __do_nothing(void*);
   2957 
   2958 template <class _Tp>
   2959 _LIBCPP_HIDDEN
   2960 void
   2961 __double_or_nothing(unique_ptr<_Tp, void(*)(void*)>& __b, _Tp*& __n, _Tp*& __e)
   2962 {
   2963     bool __owns = __b.get_deleter() != __do_nothing;
   2964     size_t __cur_cap = static_cast<size_t>(__e-__b.get()) * sizeof(_Tp);
   2965     size_t __new_cap = __cur_cap < numeric_limits<size_t>::max() / 2 ?
   2966                        2 * __cur_cap : numeric_limits<size_t>::max();
   2967     size_t __n_off = static_cast<size_t>(__n - __b.get());
   2968     _Tp* __t = (_Tp*)realloc(__owns ? __b.get() : 0, __new_cap);
   2969     if (__t == 0)
   2970         __throw_bad_alloc();
   2971     if (__owns)
   2972         __b.release();
   2973     __b = unique_ptr<_Tp, void(*)(void*)>(__t, free);
   2974     __new_cap /= sizeof(_Tp);
   2975     __n = __b.get() + __n_off;
   2976     __e = __b.get() + __new_cap;
   2977 }
   2978 
   2979 // true == success
   2980 template <class _CharT, class _InputIterator>
   2981 bool
   2982 money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
   2983                                             bool __intl, const locale& __loc,
   2984                                             ios_base::fmtflags __flags,
   2985                                             ios_base::iostate& __err,
   2986                                             bool& __neg,
   2987                                             const ctype<char_type>& __ct,
   2988                                             unique_ptr<char_type, void(*)(void*)>& __wb,
   2989                                             char_type*& __wn, char_type* __we)
   2990 {
   2991     const unsigned __bz = 100;
   2992     unsigned __gbuf[__bz];
   2993     unique_ptr<unsigned, void(*)(void*)> __gb(__gbuf, __do_nothing);
   2994     unsigned* __gn = __gb.get();
   2995     unsigned* __ge = __gn + __bz;
   2996     money_base::pattern __pat;
   2997     char_type __dp;
   2998     char_type __ts;
   2999     string __grp;
   3000     string_type __sym;
   3001     string_type __psn;
   3002     string_type __nsn;
   3003     // Capture the spaces read into money_base::{space,none} so they
   3004     // can be compared to initial spaces in __sym.
   3005     string_type __spaces;
   3006     int __fd;
   3007     __money_get<_CharT>::__gather_info(__intl, __loc, __pat, __dp, __ts, __grp,
   3008                                        __sym, __psn, __nsn, __fd);
   3009     const string_type* __trailing_sign = 0;
   3010     __wn = __wb.get();
   3011     for (unsigned __p = 0; __p < 4 && __b != __e; ++__p)
   3012     {
   3013         switch (__pat.field[__p])
   3014         {
   3015         case money_base::space:
   3016             if (__p != 3)
   3017             {
   3018                 if (__ct.is(ctype_base::space, *__b))
   3019                     __spaces.push_back(*__b++);
   3020                 else
   3021                 {
   3022                     __err |= ios_base::failbit;
   3023                     return false;
   3024                 }
   3025             }
   3026             // drop through
   3027         case money_base::none:
   3028             if (__p != 3)
   3029             {
   3030                 while (__b != __e && __ct.is(ctype_base::space, *__b))
   3031                     __spaces.push_back(*__b++);
   3032             }
   3033             break;
   3034         case money_base::sign:
   3035             if (__psn.size() + __nsn.size() > 0)
   3036             {
   3037                 if (__psn.size() == 0 || __nsn.size() == 0)
   3038                 {   // sign is optional
   3039                     if (__psn.size() > 0)
   3040                     {   // __nsn.size() == 0
   3041                         if (*__b == __psn[0])
   3042                         {
   3043                             ++__b;
   3044                             if (__psn.size() > 1)
   3045                                 __trailing_sign = &__psn;
   3046                         }
   3047                         else
   3048                             __neg = true;
   3049                     }
   3050                     else if (*__b == __nsn[0])  // __nsn.size() > 0 &&  __psn.size() == 0
   3051                     {
   3052                         ++__b;
   3053                         __neg = true;
   3054                         if (__nsn.size() > 1)
   3055                             __trailing_sign = &__nsn;
   3056                     }
   3057                 }
   3058                 else  // sign is required
   3059                 {
   3060                     if (*__b == __psn[0])
   3061                     {
   3062                         ++__b;
   3063                         if (__psn.size() > 1)
   3064                             __trailing_sign = &__psn;
   3065                     }
   3066                     else if (*__b == __nsn[0])
   3067                     {
   3068                         ++__b;
   3069                         __neg = true;
   3070                         if (__nsn.size() > 1)
   3071                             __trailing_sign = &__nsn;
   3072                     }
   3073                     else
   3074                     {
   3075                         __err |= ios_base::failbit;
   3076                         return false;
   3077                     }
   3078                 }
   3079             }
   3080             break;
   3081         case money_base::symbol:
   3082             {
   3083             bool __more_needed = __trailing_sign ||
   3084                                  (__p < 2)       ||
   3085                                  (__p == 2 && __pat.field[3] != static_cast<char>(money_base::none));
   3086             bool __sb = (__flags & ios_base::showbase) != 0;
   3087             if (__sb || __more_needed)
   3088             {
   3089                 typename string_type::const_iterator __sym_space_end = __sym.begin();
   3090                 if (__p > 0 && (__pat.field[__p - 1] == money_base::none ||
   3091                                 __pat.field[__p - 1] == money_base::space)) {
   3092                     // Match spaces we've already read against spaces at
   3093                     // the beginning of __sym.
   3094                     while (__sym_space_end != __sym.end() &&
   3095                            __ct.is(ctype_base::space, *__sym_space_end))
   3096                         ++__sym_space_end;
   3097                     const size_t __num_spaces = __sym_space_end - __sym.begin();
   3098                     if (__num_spaces > __spaces.size() ||
   3099                         !equal(__spaces.end() - __num_spaces, __spaces.end(),
   3100                                __sym.begin())) {
   3101                         // No match. Put __sym_space_end back at the
   3102                         // beginning of __sym, which will prevent a
   3103                         // match in the next loop.
   3104                         __sym_space_end = __sym.begin();
   3105                     }
   3106                 }
   3107                 typename string_type::const_iterator __sym_curr_char = __sym_space_end;
   3108                 while (__sym_curr_char != __sym.end() && __b != __e &&
   3109                        *__b == *__sym_curr_char) {
   3110                     ++__b;
   3111                     ++__sym_curr_char;
   3112                 }
   3113                 if (__sb && __sym_curr_char != __sym.end())
   3114                 {
   3115                     __err |= ios_base::failbit;
   3116                     return false;
   3117                 }
   3118             }
   3119             }
   3120             break;
   3121         case money_base::value:
   3122             {
   3123             unsigned __ng = 0;
   3124             for (; __b != __e; ++__b)
   3125             {
   3126                 char_type __c = *__b;
   3127                 if (__ct.is(ctype_base::digit, __c))
   3128                 {
   3129                     if (__wn == __we)
   3130                         __double_or_nothing(__wb, __wn, __we);
   3131                     *__wn++ = __c;
   3132                     ++__ng;
   3133                 }
   3134                 else if (__grp.size() > 0 && __ng > 0 && __c == __ts)
   3135                 {
   3136                     if (__gn == __ge)
   3137                         __double_or_nothing(__gb, __gn, __ge);
   3138                     *__gn++ = __ng;
   3139                     __ng = 0;
   3140                 }
   3141                 else
   3142                     break;
   3143             }
   3144             if (__gb.get() != __gn && __ng > 0)
   3145             {
   3146                 if (__gn == __ge)
   3147                     __double_or_nothing(__gb, __gn, __ge);
   3148                 *__gn++ = __ng;
   3149             }
   3150             if (__fd > 0)
   3151             {
   3152                 if (__b == __e || *__b != __dp)
   3153                 {
   3154                     __err |= ios_base::failbit;
   3155                     return false;
   3156                 }
   3157                 for (++__b; __fd > 0; --__fd, ++__b)
   3158                 {
   3159                     if (__b == __e || !__ct.is(ctype_base::digit, *__b))
   3160                     {
   3161                         __err |= ios_base::failbit;
   3162                         return false;
   3163                     }
   3164                     if (__wn == __we)
   3165                         __double_or_nothing(__wb, __wn, __we);
   3166                     *__wn++ = *__b;
   3167                 }
   3168             }
   3169             if (__wn == __wb.get())
   3170             {
   3171                 __err |= ios_base::failbit;
   3172                 return false;
   3173             }
   3174             }
   3175             break;
   3176         }
   3177     }
   3178     if (__trailing_sign)
   3179     {
   3180         for (unsigned __i = 1; __i < __trailing_sign->size(); ++__i, ++__b)
   3181         {
   3182             if (__b == __e || *__b != (*__trailing_sign)[__i])
   3183             {
   3184                 __err |= ios_base::failbit;
   3185                 return false;
   3186             }
   3187         }
   3188     }
   3189     if (__gb.get() != __gn)
   3190     {
   3191         ios_base::iostate __et = ios_base::goodbit;
   3192         __check_grouping(__grp, __gb.get(), __gn, __et);
   3193         if (__et)
   3194         {
   3195             __err |= ios_base::failbit;
   3196             return false;
   3197         }
   3198     }
   3199     return true;
   3200 }
   3201 
   3202 template <class _CharT, class _InputIterator>
   3203 _InputIterator
   3204 money_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
   3205                                           bool __intl, ios_base& __iob,
   3206                                           ios_base::iostate& __err,
   3207                                           long double& __v) const
   3208 {
   3209     const int __bz = 100;
   3210     char_type __wbuf[__bz];
   3211     unique_ptr<char_type, void(*)(void*)> __wb(__wbuf, __do_nothing);
   3212     char_type* __wn;
   3213     char_type* __we = __wbuf + __bz;
   3214     locale __loc = __iob.getloc();
   3215     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
   3216     bool __neg = false;
   3217     if (__do_get(__b, __e, __intl, __loc, __iob.flags(), __err, __neg, __ct,
   3218                  __wb, __wn, __we))
   3219     {
   3220         const char __src[] = "0123456789";
   3221         char_type __atoms[sizeof(__src)-1];
   3222         __ct.widen(__src, __src + (sizeof(__src)-1), __atoms);
   3223         char __nbuf[__bz];
   3224         char* __nc = __nbuf;
   3225         unique_ptr<char, void(*)(void*)> __h(0, free);
   3226         if (__wn - __wb.get() > __bz-2)
   3227         {
   3228             __h.reset((char*)malloc(static_cast<size_t>(__wn - __wb.get() + 2)));
   3229             if (__h.get() == 0)
   3230                 __throw_bad_alloc();
   3231             __nc = __h.get();
   3232         }
   3233         if (__neg)
   3234             *__nc++ = '-';
   3235         for (const char_type* __w = __wb.get(); __w < __wn; ++__w, ++__nc)
   3236             *__nc = __src[find(__atoms, _VSTD::end(__atoms), *__w) - __atoms];
   3237         *__nc = char();
   3238         if (sscanf(__nbuf, "%Lf", &__v) != 1)
   3239             __throw_runtime_error("money_get error");
   3240     }
   3241     if (__b == __e)
   3242         __err |= ios_base::eofbit;
   3243     return __b;
   3244 }
   3245 
   3246 template <class _CharT, class _InputIterator>
   3247 _InputIterator
   3248 money_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
   3249                                           bool __intl, ios_base& __iob,
   3250                                           ios_base::iostate& __err,
   3251                                           string_type& __v) const
   3252 {
   3253     const int __bz = 100;
   3254     char_type __wbuf[__bz];
   3255     unique_ptr<char_type, void(*)(void*)> __wb(__wbuf, __do_nothing);
   3256     char_type* __wn;
   3257     char_type* __we = __wbuf + __bz;
   3258     locale __loc = __iob.getloc();
   3259     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
   3260     bool __neg = false;
   3261     if (__do_get(__b, __e, __intl, __loc, __iob.flags(), __err, __neg, __ct,
   3262                  __wb, __wn, __we))
   3263     {
   3264         __v.clear();
   3265         if (__neg)
   3266             __v.push_back(__ct.widen('-'));
   3267         char_type __z = __ct.widen('0');
   3268         char_type* __w;
   3269         for (__w = __wb.get(); __w < __wn-1; ++__w)
   3270             if (*__w != __z)
   3271                 break;
   3272         __v.append(__w, __wn);
   3273     }
   3274     if (__b == __e)
   3275         __err |= ios_base::eofbit;
   3276     return __b;
   3277 }
   3278 
   3279 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS money_get<char>)
   3280 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS money_get<wchar_t>)
   3281 
   3282 // money_put
   3283 
   3284 template <class _CharT>
   3285 class __money_put
   3286 {
   3287 protected:
   3288     typedef _CharT                  char_type;
   3289     typedef basic_string<char_type> string_type;
   3290 
   3291     _LIBCPP_ALWAYS_INLINE __money_put() {}
   3292 
   3293     static void __gather_info(bool __intl, bool __neg, const locale& __loc,
   3294                               money_base::pattern& __pat, char_type& __dp,
   3295                               char_type& __ts, string& __grp,
   3296                               string_type& __sym, string_type& __sn,
   3297                               int& __fd);
   3298     static void __format(char_type* __mb, char_type*& __mi, char_type*& __me,
   3299                          ios_base::fmtflags __flags,
   3300                          const char_type* __db, const char_type* __de,
   3301                          const ctype<char_type>& __ct, bool __neg,
   3302                          const money_base::pattern& __pat, char_type __dp,
   3303                          char_type __ts, const string& __grp,
   3304                          const string_type& __sym, const string_type& __sn,
   3305                          int __fd);
   3306 };
   3307 
   3308 template <class _CharT>
   3309 void
   3310 __money_put<_CharT>::__gather_info(bool __intl, bool __neg, const locale& __loc,
   3311                                    money_base::pattern& __pat, char_type& __dp,
   3312                                    char_type& __ts, string& __grp,
   3313                                    string_type& __sym, string_type& __sn,
   3314                                    int& __fd)
   3315 {
   3316     if (__intl)
   3317     {
   3318         const moneypunct<char_type, true>& __mp =
   3319             use_facet<moneypunct<char_type, true> >(__loc);
   3320         if (__neg)
   3321         {
   3322             __pat = __mp.neg_format();
   3323             __sn = __mp.negative_sign();
   3324         }
   3325         else
   3326         {
   3327             __pat = __mp.pos_format();
   3328             __sn = __mp.positive_sign();
   3329         }
   3330         __dp = __mp.decimal_point();
   3331         __ts = __mp.thousands_sep();
   3332         __grp = __mp.grouping();
   3333         __sym = __mp.curr_symbol();
   3334         __fd = __mp.frac_digits();
   3335     }
   3336     else
   3337     {
   3338         const moneypunct<char_type, false>& __mp =
   3339             use_facet<moneypunct<char_type, false> >(__loc);
   3340         if (__neg)
   3341         {
   3342             __pat = __mp.neg_format();
   3343             __sn = __mp.negative_sign();
   3344         }
   3345         else
   3346         {
   3347             __pat = __mp.pos_format();
   3348             __sn = __mp.positive_sign();
   3349         }
   3350         __dp = __mp.decimal_point();
   3351         __ts = __mp.thousands_sep();
   3352         __grp = __mp.grouping();
   3353         __sym = __mp.curr_symbol();
   3354         __fd = __mp.frac_digits();
   3355     }
   3356 }
   3357 
   3358 template <class _CharT>
   3359 void
   3360 __money_put<_CharT>::__format(char_type* __mb, char_type*& __mi, char_type*& __me,
   3361                               ios_base::fmtflags __flags,
   3362                               const char_type* __db, const char_type* __de,
   3363                               const ctype<char_type>& __ct, bool __neg,
   3364                               const money_base::pattern& __pat, char_type __dp,
   3365                               char_type __ts, const string& __grp,
   3366                               const string_type& __sym, const string_type& __sn,
   3367                               int __fd)
   3368 {
   3369     __me = __mb;
   3370     for (unsigned __p = 0; __p < 4; ++__p)
   3371     {
   3372         switch (__pat.field[__p])
   3373         {
   3374         case money_base::none:
   3375             __mi = __me;
   3376             break;
   3377         case money_base::space:
   3378             __mi = __me;
   3379             *__me++ = __ct.widen(' ');
   3380             break;
   3381         case money_base::sign:
   3382             if (!__sn.empty())
   3383                 *__me++ = __sn[0];
   3384             break;
   3385         case money_base::symbol:
   3386             if (!__sym.empty() && (__flags & ios_base::showbase))
   3387                 __me = _VSTD::copy(__sym.begin(), __sym.end(), __me);
   3388             break;
   3389         case money_base::value:
   3390             {
   3391             // remember start of value so we can reverse it
   3392             char_type* __t = __me;
   3393             // find beginning of digits
   3394             if (__neg)
   3395                 ++__db;
   3396             // find end of digits
   3397             const char_type* __d;
   3398             for (__d = __db; __d < __de; ++__d)
   3399                 if (!__ct.is(ctype_base::digit, *__d))
   3400                     break;
   3401             // print fractional part
   3402             if (__fd > 0)
   3403             {
   3404                 int __f;
   3405                 for (__f = __fd; __d > __db && __f > 0; --__f)
   3406                     *__me++ = *--__d;
   3407                 char_type __z = __f > 0 ? __ct.widen('0') : char_type();
   3408                 for (; __f > 0; --__f)
   3409                     *__me++ = __z;
   3410                 *__me++ = __dp;
   3411             }
   3412             // print units part
   3413             if (__d == __db)
   3414             {
   3415                 *__me++ = __ct.widen('0');
   3416             }
   3417             else
   3418             {
   3419                 unsigned __ng = 0;
   3420                 unsigned __ig = 0;
   3421                 unsigned __gl = __grp.empty() ? numeric_limits<unsigned>::max()
   3422                                               : static_cast<unsigned>(__grp[__ig]);
   3423                 while (__d != __db)
   3424                 {
   3425                     if (__ng == __gl)
   3426                     {
   3427                         *__me++ = __ts;
   3428                         __ng = 0;
   3429                         if (++__ig < __grp.size())
   3430                             __gl = __grp[__ig] == numeric_limits<char>::max() ?
   3431                                         numeric_limits<unsigned>::max() :
   3432                                         static_cast<unsigned>(__grp[__ig]);
   3433                     }
   3434                     *__me++ = *--__d;
   3435                     ++__ng;
   3436                 }
   3437             }
   3438             // reverse it
   3439             reverse(__t, __me);
   3440             }
   3441             break;
   3442         }
   3443     }
   3444     // print rest of sign, if any
   3445     if (__sn.size() > 1)
   3446         __me = _VSTD::copy(__sn.begin()+1, __sn.end(), __me);
   3447     // set alignment
   3448     if ((__flags & ios_base::adjustfield) == ios_base::left)
   3449         __mi = __me;
   3450     else if ((__flags & ios_base::adjustfield) != ios_base::internal)
   3451         __mi = __mb;
   3452 }
   3453 
   3454 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS __money_put<char>)
   3455 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS __money_put<wchar_t>)
   3456 
   3457 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
   3458 class _LIBCPP_TYPE_VIS_ONLY money_put
   3459     : public locale::facet,
   3460       private __money_put<_CharT>
   3461 {
   3462 public:
   3463     typedef _CharT                  char_type;
   3464     typedef _OutputIterator         iter_type;
   3465     typedef basic_string<char_type> string_type;
   3466 
   3467     _LIBCPP_ALWAYS_INLINE
   3468     explicit money_put(size_t __refs = 0)
   3469         : locale::facet(__refs) {}
   3470 
   3471     _LIBCPP_ALWAYS_INLINE
   3472     iter_type put(iter_type __s, bool __intl, ios_base& __iob, char_type __fl,
   3473                   long double __units) const
   3474     {
   3475         return do_put(__s, __intl, __iob, __fl, __units);
   3476     }
   3477 
   3478     _LIBCPP_ALWAYS_INLINE
   3479     iter_type put(iter_type __s, bool __intl, ios_base& __iob, char_type __fl,
   3480                   const string_type& __digits) const
   3481     {
   3482         return do_put(__s, __intl, __iob, __fl, __digits);
   3483     }
   3484 
   3485     static locale::id id;
   3486 
   3487 protected:
   3488     _LIBCPP_ALWAYS_INLINE
   3489     ~money_put() {}
   3490 
   3491     virtual iter_type do_put(iter_type __s, bool __intl, ios_base& __iob,
   3492                              char_type __fl, long double __units) const;
   3493     virtual iter_type do_put(iter_type __s, bool __intl, ios_base& __iob,
   3494                              char_type __fl, const string_type& __digits) const;
   3495 };
   3496 
   3497 template <class _CharT, class _OutputIterator>
   3498 locale::id
   3499 money_put<_CharT, _OutputIterator>::id;
   3500 
   3501 template <class _CharT, class _OutputIterator>
   3502 _OutputIterator
   3503 money_put<_CharT, _OutputIterator>::do_put(iter_type __s, bool __intl,
   3504                                            ios_base& __iob, char_type __fl,
   3505                                            long double __units) const
   3506 {
   3507     // convert to char
   3508     const size_t __bs = 100;
   3509     char __buf[__bs];
   3510     char* __bb = __buf;
   3511     char_type __digits[__bs];
   3512     char_type* __db = __digits;
   3513     size_t __n = static_cast<size_t>(snprintf(__bb, __bs, "%.0Lf", __units));
   3514     unique_ptr<char, void(*)(void*)> __hn(0, free);
   3515     unique_ptr<char_type, void(*)(void*)> __hd(0, free);
   3516     // secure memory for digit storage
   3517     if (__n > __bs-1)
   3518     {
   3519 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
   3520         __n = static_cast<size_t>(asprintf_l(&__bb, _LIBCPP_GET_C_LOCALE, "%.0Lf", __units));
   3521 #else
   3522         __n = __asprintf_l(&__bb, __cloc(), "%.0Lf", __units);
   3523 #endif
   3524         if (__bb == 0)
   3525             __throw_bad_alloc();
   3526         __hn.reset(__bb);
   3527         __hd.reset((char_type*)malloc(__n * sizeof(char_type)));
   3528         if (__hd == nullptr)
   3529             __throw_bad_alloc();
   3530         __db = __hd.get();
   3531     }
   3532     // gather info
   3533     locale __loc = __iob.getloc();
   3534     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
   3535     __ct.widen(__bb, __bb + __n, __db);
   3536     bool __neg = __n > 0 && __bb[0] == '-';
   3537     money_base::pattern __pat;
   3538     char_type __dp;
   3539     char_type __ts;
   3540     string __grp;
   3541     string_type __sym;
   3542     string_type __sn;
   3543     int __fd;
   3544     this->__gather_info(__intl, __neg, __loc, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
   3545     // secure memory for formatting
   3546     char_type __mbuf[__bs];
   3547     char_type* __mb = __mbuf;
   3548     unique_ptr<char_type, void(*)(void*)> __hw(0, free);
   3549     size_t __exn = static_cast<int>(__n) > __fd ?
   3550                    (__n - static_cast<size_t>(__fd)) * 2 + __sn.size() +
   3551                     __sym.size() + static_cast<size_t>(__fd) + 1
   3552                  : __sn.size() + __sym.size() + static_cast<size_t>(__fd) + 2;
   3553     if (__exn > __bs)
   3554     {
   3555         __hw.reset((char_type*)malloc(__exn * sizeof(char_type)));
   3556         __mb = __hw.get();
   3557         if (__mb == 0)
   3558             __throw_bad_alloc();
   3559     }
   3560     // format
   3561     char_type* __mi;
   3562     char_type* __me;
   3563     this->__format(__mb, __mi, __me, __iob.flags(),
   3564                    __db, __db + __n, __ct,
   3565                    __neg, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
   3566     return __pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
   3567 }
   3568 
   3569 template <class _CharT, class _OutputIterator>
   3570 _OutputIterator
   3571 money_put<_CharT, _OutputIterator>::do_put(iter_type __s, bool __intl,
   3572                                            ios_base& __iob, char_type __fl,
   3573                                            const string_type& __digits) const
   3574 {
   3575     // gather info
   3576     locale __loc = __iob.getloc();
   3577     const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
   3578     bool __neg = __digits.size() > 0 && __digits[0] == __ct.widen('-');
   3579     money_base::pattern __pat;
   3580     char_type __dp;
   3581     char_type __ts;
   3582     string __grp;
   3583     string_type __sym;
   3584     string_type __sn;
   3585     int __fd;
   3586     this->__gather_info(__intl, __neg, __loc, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
   3587     // secure memory for formatting
   3588     char_type __mbuf[100];
   3589     char_type* __mb = __mbuf;
   3590     unique_ptr<char_type, void(*)(void*)> __h(0, free);
   3591     size_t __exn = static_cast<int>(__digits.size()) > __fd ?
   3592                    (__digits.size() - static_cast<size_t>(__fd)) * 2 +
   3593                     __sn.size() + __sym.size() + static_cast<size_t>(__fd) + 1
   3594                  : __sn.size() + __sym.size() + static_cast<size_t>(__fd) + 2;
   3595     if (__exn > 100)
   3596     {
   3597         __h.reset((char_type*)malloc(__exn * sizeof(char_type)));
   3598         __mb = __h.get();
   3599         if (__mb == 0)
   3600             __throw_bad_alloc();
   3601     }
   3602     // format
   3603     char_type* __mi;
   3604     char_type* __me;
   3605     this->__format(__mb, __mi, __me, __iob.flags(),
   3606                    __digits.data(), __digits.data() + __digits.size(), __ct,
   3607                    __neg, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
   3608     return __pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
   3609 }
   3610 
   3611 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS money_put<char>)
   3612 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS money_put<wchar_t>)
   3613 
   3614 // messages
   3615 
   3616 class _LIBCPP_TYPE_VIS messages_base
   3617 {
   3618 public:
   3619     typedef ptrdiff_t catalog;
   3620 
   3621     _LIBCPP_ALWAYS_INLINE messages_base() {}
   3622 };
   3623 
   3624 template <class _CharT>
   3625 class _LIBCPP_TYPE_VIS_ONLY messages
   3626     : public locale::facet,
   3627       public messages_base
   3628 {
   3629 public:
   3630     typedef _CharT               char_type;
   3631     typedef basic_string<_CharT> string_type;
   3632 
   3633     _LIBCPP_ALWAYS_INLINE
   3634     explicit messages(size_t __refs = 0)
   3635         : locale::facet(__refs) {}
   3636 
   3637     _LIBCPP_ALWAYS_INLINE
   3638     catalog open(const basic_string<char>& __nm, const locale& __loc) const
   3639     {
   3640         return do_open(__nm, __loc);
   3641     }
   3642 
   3643     _LIBCPP_ALWAYS_INLINE
   3644     string_type get(catalog __c, int __set, int __msgid,
   3645                     const string_type& __dflt) const
   3646     {
   3647         return do_get(__c, __set, __msgid, __dflt);
   3648     }
   3649 
   3650     _LIBCPP_ALWAYS_INLINE
   3651     void close(catalog __c) const
   3652     {
   3653         do_close(__c);
   3654     }
   3655 
   3656     static locale::id id;
   3657 
   3658 protected:
   3659     _LIBCPP_ALWAYS_INLINE
   3660     ~messages() {}
   3661 
   3662     virtual catalog do_open(const basic_string<char>&, const locale&) const;
   3663     virtual string_type do_get(catalog, int __set, int __msgid,
   3664                                const string_type& __dflt) const;
   3665     virtual void do_close(catalog) const;
   3666 };
   3667 
   3668 template <class _CharT>
   3669 locale::id
   3670 messages<_CharT>::id;
   3671 
   3672 template <class _CharT>
   3673 typename messages<_CharT>::catalog
   3674 messages<_CharT>::do_open(const basic_string<char>& __nm, const locale&) const
   3675 {
   3676 #ifdef _WIN32
   3677     return -1;
   3678 #else // _WIN32
   3679     catalog __cat = (catalog)catopen(__nm.c_str(), NL_CAT_LOCALE);
   3680     if (__cat != -1)
   3681         __cat = static_cast<catalog>((static_cast<size_t>(__cat) >> 1));
   3682     return __cat;
   3683 #endif // _WIN32
   3684 }
   3685 
   3686 template <class _CharT>
   3687 typename messages<_CharT>::string_type
   3688 messages<_CharT>::do_get(catalog __c, int __set, int __msgid,
   3689                          const string_type& __dflt) const
   3690 {
   3691 #ifdef _WIN32
   3692     return __dflt;
   3693 #else // _WIN32
   3694     string __ndflt;
   3695     __narrow_to_utf8<sizeof(char_type)*__CHAR_BIT__>()(back_inserter(__ndflt),
   3696                                                        __dflt.c_str(),
   3697                                                        __dflt.c_str() + __dflt.size());
   3698     if (__c != -1)
   3699         __c <<= 1;
   3700     nl_catd __cat = (nl_catd)__c;
   3701     char* __n = catgets(__cat, __set, __msgid, __ndflt.c_str());
   3702     string_type __w;
   3703     __widen_from_utf8<sizeof(char_type)*__CHAR_BIT__>()(back_inserter(__w),
   3704                                                         __n, __n + strlen(__n));
   3705     return __w;
   3706 #endif // _WIN32
   3707 }
   3708 
   3709 template <class _CharT>
   3710 void
   3711 messages<_CharT>::do_close(catalog __c) const
   3712 {
   3713 #if !defined(_WIN32)
   3714     if (__c != -1)
   3715         __c <<= 1;
   3716     nl_catd __cat = (nl_catd)__c;
   3717     catclose(__cat);
   3718 #endif // !_WIN32
   3719 }
   3720 
   3721 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS messages<char>)
   3722 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS messages<wchar_t>)
   3723 
   3724 template <class _CharT>
   3725 class _LIBCPP_TYPE_VIS_ONLY messages_byname
   3726     : public messages<_CharT>
   3727 {
   3728 public:
   3729     typedef messages_base::catalog catalog;
   3730     typedef basic_string<_CharT> string_type;
   3731 
   3732     _LIBCPP_ALWAYS_INLINE
   3733     explicit messages_byname(const char*, size_t __refs = 0)
   3734         : messages<_CharT>(__refs) {}
   3735 
   3736     _LIBCPP_ALWAYS_INLINE
   3737     explicit messages_byname(const string&, size_t __refs = 0)
   3738         : messages<_CharT>(__refs) {}
   3739 
   3740 protected:
   3741     _LIBCPP_ALWAYS_INLINE
   3742     ~messages_byname() {}
   3743 };
   3744 
   3745 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS messages_byname<char>)
   3746 _LIBCPP_EXTERN_TEMPLATE2(class _LIBCPP_TYPE_VIS messages_byname<wchar_t>)
   3747 
   3748 template<class _Codecvt, class _Elem = wchar_t,
   3749          class _Wide_alloc = allocator<_Elem>,
   3750          class _Byte_alloc = allocator<char> >
   3751 class _LIBCPP_TYPE_VIS_ONLY wstring_convert
   3752 {
   3753 public:
   3754     typedef basic_string<char, char_traits<char>, _Byte_alloc>   byte_string;
   3755     typedef basic_string<_Elem, char_traits<_Elem>, _Wide_alloc> wide_string;
   3756     typedef typename _Codecvt::state_type                        state_type;
   3757     typedef typename wide_string::traits_type::int_type          int_type;
   3758 
   3759 private:
   3760     byte_string __byte_err_string_;
   3761     wide_string __wide_err_string_;
   3762     _Codecvt* __cvtptr_;
   3763     state_type __cvtstate_;
   3764     size_t __cvtcount_;
   3765 
   3766     wstring_convert(const wstring_convert& __wc);
   3767     wstring_convert& operator=(const wstring_convert& __wc);
   3768 public:
   3769     _LIBCPP_EXPLICIT_AFTER_CXX11 wstring_convert(_Codecvt* __pcvt = new _Codecvt);
   3770     wstring_convert(_Codecvt* __pcvt, state_type __state);
   3771     _LIBCPP_EXPLICIT_AFTER_CXX11 wstring_convert(const byte_string& __byte_err,
   3772                     const wide_string& __wide_err = wide_string());
   3773 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
   3774     wstring_convert(wstring_convert&& __wc);
   3775 #endif
   3776     ~wstring_convert();
   3777 
   3778     _LIBCPP_ALWAYS_INLINE
   3779     wide_string from_bytes(char __byte)
   3780         {return from_bytes(&__byte, &__byte+1);}
   3781     _LIBCPP_ALWAYS_INLINE
   3782     wide_string from_bytes(const char* __ptr)
   3783         {return from_bytes(__ptr, __ptr + char_traits<char>::length(__ptr));}
   3784     _LIBCPP_ALWAYS_INLINE
   3785     wide_string from_bytes(const byte_string& __str)
   3786         {return from_bytes(__str.data(), __str.data() + __str.size());}
   3787     wide_string from_bytes(const char* __first, const char* __last);
   3788 
   3789     _LIBCPP_ALWAYS_INLINE
   3790     byte_string to_bytes(_Elem __wchar)
   3791         {return to_bytes(&__wchar, &__wchar+1);}
   3792     _LIBCPP_ALWAYS_INLINE
   3793     byte_string to_bytes(const _Elem* __wptr)
   3794         {return to_bytes(__wptr, __wptr + char_traits<_Elem>::length(__wptr));}
   3795     _LIBCPP_ALWAYS_INLINE
   3796     byte_string to_bytes(const wide_string& __wstr)
   3797         {return to_bytes(__wstr.data(), __wstr.data() + __wstr.size());}
   3798     byte_string to_bytes(const _Elem* __first, const _Elem* __last);
   3799 
   3800     _LIBCPP_ALWAYS_INLINE
   3801     size_t converted() const _NOEXCEPT {return __cvtcount_;}
   3802     _LIBCPP_ALWAYS_INLINE
   3803     state_type state() const {return __cvtstate_;}
   3804 };
   3805 
   3806 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3807 inline _LIBCPP_ALWAYS_INLINE
   3808 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
   3809     wstring_convert(_Codecvt* __pcvt)
   3810         : __cvtptr_(__pcvt), __cvtstate_(), __cvtcount_(0)
   3811 {
   3812 }
   3813 
   3814 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3815 inline _LIBCPP_ALWAYS_INLINE
   3816 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
   3817     wstring_convert(_Codecvt* __pcvt, state_type __state)
   3818         : __cvtptr_(__pcvt), __cvtstate_(__state), __cvtcount_(0)
   3819 {
   3820 }
   3821 
   3822 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3823 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
   3824     wstring_convert(const byte_string& __byte_err, const wide_string& __wide_err)
   3825         : __byte_err_string_(__byte_err), __wide_err_string_(__wide_err),
   3826           __cvtstate_(), __cvtcount_(0)
   3827 {
   3828     __cvtptr_ = new _Codecvt;
   3829 }
   3830 
   3831 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
   3832 
   3833 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3834 inline _LIBCPP_ALWAYS_INLINE
   3835 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
   3836     wstring_convert(wstring_convert&& __wc)
   3837         : __byte_err_string_(_VSTD::move(__wc.__byte_err_string_)),
   3838           __wide_err_string_(_VSTD::move(__wc.__wide_err_string_)),
   3839           __cvtptr_(__wc.__cvtptr_),
   3840           __cvtstate_(__wc.__cvtstate_), __cvtcount_(__wc.__cvtstate_)
   3841 {
   3842     __wc.__cvtptr_ = nullptr;
   3843 }
   3844 
   3845 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
   3846 
   3847 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3848 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::~wstring_convert()
   3849 {
   3850     delete __cvtptr_;
   3851 }
   3852 
   3853 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3854 typename wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::wide_string
   3855 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
   3856     from_bytes(const char* __frm, const char* __frm_end)
   3857 {
   3858     __cvtcount_ = 0;
   3859     if (__cvtptr_ != nullptr)
   3860     {
   3861         wide_string __ws(2*(__frm_end - __frm), _Elem());
   3862         if (__frm != __frm_end)
   3863             __ws.resize(__ws.capacity());
   3864         codecvt_base::result __r = codecvt_base::ok;
   3865         state_type __st = __cvtstate_;
   3866         if (__frm != __frm_end)
   3867         {
   3868             _Elem* __to = &__ws[0];
   3869             _Elem* __to_end = __to + __ws.size();
   3870             const char* __frm_nxt;
   3871             do
   3872             {
   3873                 _Elem* __to_nxt;
   3874                 __r = __cvtptr_->in(__st, __frm, __frm_end, __frm_nxt,
   3875                                           __to, __to_end, __to_nxt);
   3876                 __cvtcount_ += __frm_nxt - __frm;
   3877                 if (__frm_nxt == __frm)
   3878                 {
   3879                     __r = codecvt_base::error;
   3880                 }
   3881                 else if (__r == codecvt_base::noconv)
   3882                 {
   3883                     __ws.resize(__to - &__ws[0]);
   3884                     // This only gets executed if _Elem is char
   3885                     __ws.append((const _Elem*)__frm, (const _Elem*)__frm_end);
   3886                     __frm = __frm_nxt;
   3887                     __r = codecvt_base::ok;
   3888                 }
   3889                 else if (__r == codecvt_base::ok)
   3890                 {
   3891                     __ws.resize(__to_nxt - &__ws[0]);
   3892                     __frm = __frm_nxt;
   3893                 }
   3894                 else if (__r == codecvt_base::partial)
   3895                 {
   3896                     ptrdiff_t __s = __to_nxt - &__ws[0];
   3897                     __ws.resize(2 * __s);
   3898                     __to = &__ws[0] + __s;
   3899                     __to_end = &__ws[0] + __ws.size();
   3900                     __frm = __frm_nxt;
   3901                 }
   3902             } while (__r == codecvt_base::partial && __frm_nxt < __frm_end);
   3903         }
   3904         if (__r == codecvt_base::ok)
   3905             return __ws;
   3906     }
   3907 #ifndef _LIBCPP_NO_EXCEPTIONS
   3908     if (__wide_err_string_.empty())
   3909         throw range_error("wstring_convert: from_bytes error");
   3910 #endif  // _LIBCPP_NO_EXCEPTIONS
   3911     return __wide_err_string_;
   3912 }
   3913 
   3914 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
   3915 typename wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::byte_string
   3916 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
   3917     to_bytes(const _Elem* __frm, const _Elem* __frm_end)
   3918 {
   3919     __cvtcount_ = 0;
   3920     if (__cvtptr_ != nullptr)
   3921     {
   3922         byte_string __bs(2*(__frm_end - __frm), char());
   3923         if (__frm != __frm_end)
   3924             __bs.resize(__bs.capacity());
   3925         codecvt_base::result __r = codecvt_base::ok;
   3926         state_type __st = __cvtstate_;
   3927         if (__frm != __frm_end)
   3928         {
   3929             char* __to = &__bs[0];
   3930             char* __to_end = __to + __bs.size();
   3931             const _Elem* __frm_nxt;
   3932             do
   3933             {
   3934                 char* __to_nxt;
   3935                 __r = __cvtptr_->out(__st, __frm, __frm_end, __frm_nxt,
   3936                                            __to, __to_end, __to_nxt);
   3937                 __cvtcount_ += __frm_nxt - __frm;
   3938                 if (__frm_nxt == __frm)
   3939                 {
   3940                     __r = codecvt_base::error;
   3941                 }
   3942                 else if (__r == codecvt_base::noconv)
   3943                 {
   3944                     __bs.resize(__to - &__bs[0]);
   3945                     // This only gets executed if _Elem is char
   3946                     __bs.append((const char*)__frm, (const char*)__frm_end);
   3947                     __frm = __frm_nxt;
   3948                     __r = codecvt_base::ok;
   3949                 }
   3950                 else if (__r == codecvt_base::ok)
   3951                 {
   3952                     __bs.resize(__to_nxt - &__bs[0]);
   3953                     __frm = __frm_nxt;
   3954                 }
   3955                 else if (__r == codecvt_base::partial)
   3956                 {
   3957                     ptrdiff_t __s = __to_nxt - &__bs[0];
   3958                     __bs.resize(2 * __s);
   3959                     __to = &__bs[0] + __s;
   3960                     __to_end = &__bs[0] + __bs.size();
   3961                     __frm = __frm_nxt;
   3962                 }
   3963             } while (__r == codecvt_base::partial && __frm_nxt < __frm_end);
   3964         }
   3965         if (__r == codecvt_base::ok)
   3966         {
   3967             size_t __s = __bs.size();
   3968             __bs.resize(__bs.capacity());
   3969             char* __to = &__bs[0] + __s;
   3970             char* __to_end = __to + __bs.size();
   3971             do
   3972             {
   3973                 char* __to_nxt;
   3974                 __r = __cvtptr_->unshift(__st, __to, __to_end, __to_nxt);
   3975                 if (__r == codecvt_base::noconv)
   3976                 {
   3977                     __bs.resize(__to - &__bs[0]);
   3978                     __r = codecvt_base::ok;
   3979                 }
   3980                 else if (__r == codecvt_base::ok)
   3981                 {
   3982                     __bs.resize(__to_nxt - &__bs[0]);
   3983                 }
   3984                 else if (__r == codecvt_base::partial)
   3985                 {
   3986                     ptrdiff_t __sp = __to_nxt - &__bs[0];
   3987                     __bs.resize(2 * __sp);
   3988                     __to = &__bs[0] + __sp;
   3989                     __to_end = &__bs[0] + __bs.size();
   3990                 }
   3991             } while (__r == codecvt_base::partial);
   3992             if (__r == codecvt_base::ok)
   3993                 return __bs;
   3994         }
   3995     }
   3996 #ifndef _LIBCPP_NO_EXCEPTIONS
   3997     if (__byte_err_string_.empty())
   3998         throw range_error("wstring_convert: to_bytes error");
   3999 #endif  // _LIBCPP_NO_EXCEPTIONS
   4000     return __byte_err_string_;
   4001 }
   4002 
   4003 template <class _Codecvt, class _Elem = wchar_t, class _Tr = char_traits<_Elem> >
   4004 class _LIBCPP_TYPE_VIS_ONLY wbuffer_convert
   4005     : public basic_streambuf<_Elem, _Tr>
   4006 {
   4007 public:
   4008     // types:
   4009     typedef _Elem                          char_type;
   4010     typedef _Tr                            traits_type;
   4011     typedef typename traits_type::int_type int_type;
   4012     typedef typename traits_type::pos_type pos_type;
   4013     typedef typename traits_type::off_type off_type;
   4014     typedef typename _Codecvt::state_type  state_type;
   4015 
   4016 private:
   4017     char*       __extbuf_;
   4018     const char* __extbufnext_;
   4019     const char* __extbufend_;
   4020     char __extbuf_min_[8];
   4021     size_t __ebs_;
   4022     char_type* __intbuf_;
   4023     size_t __ibs_;
   4024     streambuf* __bufptr_;
   4025     _Codecvt* __cv_;
   4026     state_type __st_;
   4027     ios_base::openmode __cm_;
   4028     bool __owns_eb_;
   4029     bool __owns_ib_;
   4030     bool __always_noconv_;
   4031 
   4032     wbuffer_convert(const wbuffer_convert&);
   4033     wbuffer_convert& operator=(const wbuffer_convert&);
   4034 public:
   4035     _LIBCPP_EXPLICIT_AFTER_CXX11 wbuffer_convert(streambuf* __bytebuf = 0, 
   4036             _Codecvt* __pcvt = new _Codecvt, state_type __state = state_type());
   4037     ~wbuffer_convert();
   4038 
   4039     _LIBCPP_INLINE_VISIBILITY
   4040     streambuf* rdbuf() const {return __bufptr_;}
   4041     _LIBCPP_INLINE_VISIBILITY
   4042     streambuf* rdbuf(streambuf* __bytebuf)
   4043     {
   4044         streambuf* __r = __bufptr_;
   4045         __bufptr_ = __bytebuf;
   4046         return __r;
   4047     }
   4048 
   4049     _LIBCPP_INLINE_VISIBILITY
   4050     state_type state() const {return __st_;}
   4051 
   4052 protected:
   4053     virtual int_type underflow();
   4054     virtual int_type pbackfail(int_type __c = traits_type::eof());
   4055     virtual int_type overflow (int_type __c = traits_type::eof());
   4056     virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* __s,
   4057                                                             streamsize __n);
   4058     virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
   4059                              ios_base::openmode __wch = ios_base::in | ios_base::out);
   4060     virtual pos_type seekpos(pos_type __sp,
   4061                              ios_base::openmode __wch = ios_base::in | ios_base::out);
   4062     virtual int sync();
   4063 
   4064 private:
   4065     bool __read_mode();
   4066     void __write_mode();
   4067     wbuffer_convert* __close();
   4068 };
   4069 
   4070 template <class _Codecvt, class _Elem, class _Tr>
   4071 wbuffer_convert<_Codecvt, _Elem, _Tr>::
   4072     wbuffer_convert(streambuf* __bytebuf, _Codecvt* __pcvt, state_type __state)
   4073     : __extbuf_(0),
   4074       __extbufnext_(0),
   4075       __extbufend_(0),
   4076       __ebs_(0),
   4077       __intbuf_(0),
   4078       __ibs_(0),
   4079       __bufptr_(__bytebuf),
   4080       __cv_(__pcvt),
   4081       __st_(__state),
   4082       __cm_(0),
   4083       __owns_eb_(false),
   4084       __owns_ib_(false),
   4085       __always_noconv_(__cv_ ? __cv_->always_noconv() : false)
   4086 {
   4087     setbuf(0, 4096);
   4088 }
   4089 
   4090 template <class _Codecvt, class _Elem, class _Tr>
   4091 wbuffer_convert<_Codecvt, _Elem, _Tr>::~wbuffer_convert()
   4092 {
   4093     __close();
   4094     delete __cv_;
   4095     if (__owns_eb_)
   4096         delete [] __extbuf_;
   4097     if (__owns_ib_)
   4098         delete [] __intbuf_;
   4099 }
   4100 
   4101 template <class _Codecvt, class _Elem, class _Tr>
   4102 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
   4103 wbuffer_convert<_Codecvt, _Elem, _Tr>::underflow()
   4104 {
   4105     if (__cv_ == 0 || __bufptr_ == 0)
   4106         return traits_type::eof();
   4107     bool __initial = __read_mode();
   4108     char_type __1buf;
   4109     if (this->gptr() == 0)
   4110         this->setg(&__1buf, &__1buf+1, &__1buf+1);
   4111     const size_t __unget_sz = __initial ? 0 : min<size_t>((this->egptr() - this->eback()) / 2, 4);
   4112     int_type __c = traits_type::eof();
   4113     if (this->gptr() == this->egptr())
   4114     {
   4115         memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type));
   4116         if (__always_noconv_)
   4117         {
   4118             streamsize __nmemb = static_cast<streamsize>(this->egptr() - this->eback() - __unget_sz);
   4119             __nmemb = __bufptr_->sgetn((char*)this->eback() + __unget_sz, __nmemb);
   4120             if (__nmemb != 0)
   4121             {
   4122                 this->setg(this->eback(),
   4123                            this->eback() + __unget_sz,
   4124                            this->eback() + __unget_sz + __nmemb);
   4125                 __c = *this->gptr();
   4126             }
   4127         }
   4128         else
   4129         {
   4130             memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
   4131             __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_);
   4132             __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
   4133             streamsize __nmemb = _VSTD::min(static_cast<streamsize>(this->egptr() - this->eback() - __unget_sz),
   4134                                  static_cast<streamsize>(__extbufend_ - __extbufnext_));
   4135             codecvt_base::result __r;
   4136             state_type __svs = __st_;
   4137             streamsize __nr = __bufptr_->sgetn(const_cast<char*>(__extbufnext_), __nmemb);
   4138             if (__nr != 0)
   4139             {
   4140                 __extbufend_ = __extbufnext_ + __nr;
   4141                 char_type*  __inext;
   4142                 __r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_,
   4143                                        this->eback() + __unget_sz,
   4144                                        this->egptr(), __inext);
   4145                 if (__r == codecvt_base::noconv)
   4146                 {
   4147                     this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)__extbufend_);
   4148                     __c = *this->gptr();
   4149                 }
   4150                 else if (__inext != this->eback() + __unget_sz)
   4151                 {
   4152                     this->setg(this->eback(), this->eback() + __unget_sz, __inext);
   4153                     __c = *this->gptr();
   4154                 }
   4155             }
   4156         }
   4157     }
   4158     else
   4159         __c = *this->gptr();
   4160     if (this->eback() == &__1buf)
   4161         this->setg(0, 0, 0);
   4162     return __c;
   4163 }
   4164 
   4165 template <class _Codecvt, class _Elem, class _Tr>
   4166 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
   4167 wbuffer_convert<_Codecvt, _Elem, _Tr>::pbackfail(int_type __c)
   4168 {
   4169     if (__cv_ != 0 && __bufptr_ != 0 && this->eback() < this->gptr())
   4170     {
   4171         if (traits_type::eq_int_type(__c, traits_type::eof()))
   4172         {
   4173             this->gbump(-1);
   4174             return traits_type::not_eof(__c);
   4175         }
   4176         if (traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1]))
   4177         {
   4178             this->gbump(-1);
   4179             *this->gptr() = traits_type::to_char_type(__c);
   4180             return __c;
   4181         }
   4182     }
   4183     return traits_type::eof();
   4184 }
   4185 
   4186 template <class _Codecvt, class _Elem, class _Tr>
   4187 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
   4188 wbuffer_convert<_Codecvt, _Elem, _Tr>::overflow(int_type __c)
   4189 {
   4190     if (__cv_ == 0 || __bufptr_ == 0)
   4191         return traits_type::eof();
   4192     __write_mode();
   4193     char_type __1buf;
   4194     char_type* __pb_save = this->pbase();
   4195     char_type* __epb_save = this->epptr();
   4196     if (!traits_type::eq_int_type(__c, traits_type::eof()))
   4197     {
   4198         if (this->pptr() == 0)
   4199             this->setp(&__1buf, &__1buf+1);
   4200         *this->pptr() = traits_type::to_char_type(__c);
   4201         this->pbump(1);
   4202     }
   4203     if (this->pptr() != this->pbase())
   4204     {
   4205         if (__always_noconv_)
   4206         {
   4207             streamsize __nmemb = static_cast<streamsize>(this->pptr() - this->pbase());
   4208             if (__bufptr_->sputn((const char*)this->pbase(), __nmemb) != __nmemb)
   4209                 return traits_type::eof();
   4210         }
   4211         else
   4212         {
   4213             char* __extbe = __extbuf_;
   4214             codecvt_base::result __r;
   4215             do
   4216             {
   4217                 const char_type* __e;
   4218                 __r = __cv_->out(__st_, this->pbase(), this->pptr(), __e,
   4219                                         __extbuf_, __extbuf_ + __ebs_, __extbe);
   4220                 if (__e == this->pbase())
   4221                     return traits_type::eof();
   4222                 if (__r == codecvt_base::noconv)
   4223                 {
   4224                     streamsize __nmemb = static_cast<size_t>(this->pptr() - this->pbase());
   4225                     if (__bufptr_->sputn((const char*)this->pbase(), __nmemb) != __nmemb)
   4226                         return traits_type::eof();
   4227                 }
   4228                 else if (__r == codecvt_base::ok || __r == codecvt_base::partial)
   4229                 {
   4230                     streamsize __nmemb = static_cast<size_t>(__extbe - __extbuf_);
   4231                     if (__bufptr_->sputn(__extbuf_, __nmemb) != __nmemb)
   4232                         return traits_type::eof();
   4233                     if (__r == codecvt_base::partial)
   4234                     {
   4235                         this->setp((char_type*)__e, this->pptr());
   4236                         this->pbump(this->epptr() - this->pbase());
   4237                     }
   4238                 }
   4239                 else
   4240                     return traits_type::eof();
   4241             } while (__r == codecvt_base::partial);
   4242         }
   4243         this->setp(__pb_save, __epb_save);
   4244     }
   4245     return traits_type::not_eof(__c);
   4246 }
   4247 
   4248 template <class _Codecvt, class _Elem, class _Tr>
   4249 basic_streambuf<_Elem, _Tr>*
   4250 wbuffer_convert<_Codecvt, _Elem, _Tr>::setbuf(char_type* __s, streamsize __n)
   4251 {
   4252     this->setg(0, 0, 0);
   4253     this->setp(0, 0);
   4254     if (__owns_eb_)
   4255         delete [] __extbuf_;
   4256     if (__owns_ib_)
   4257         delete [] __intbuf_;
   4258     __ebs_ = __n;
   4259     if (__ebs_ > sizeof(__extbuf_min_))
   4260     {
   4261         if (__always_noconv_ && __s)
   4262         {
   4263             __extbuf_ = (char*)__s;
   4264             __owns_eb_ = false;
   4265         }
   4266         else
   4267         {
   4268             __extbuf_ = new char[__ebs_];
   4269             __owns_eb_ = true;
   4270         }
   4271     }
   4272     else
   4273     {
   4274         __extbuf_ = __extbuf_min_;
   4275         __ebs_ = sizeof(__extbuf_min_);
   4276         __owns_eb_ = false;
   4277     }
   4278     if (!__always_noconv_)
   4279     {
   4280         __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_));
   4281         if (__s && __ibs_ >= sizeof(__extbuf_min_))
   4282         {
   4283             __intbuf_ = __s;
   4284             __owns_ib_ = false;
   4285         }
   4286         else
   4287         {
   4288             __intbuf_ = new char_type[__ibs_];
   4289             __owns_ib_ = true;
   4290         }
   4291     }
   4292     else
   4293     {
   4294         __ibs_ = 0;
   4295         __intbuf_ = 0;
   4296         __owns_ib_ = false;
   4297     }
   4298     return this;
   4299 }
   4300 
   4301 template <class _Codecvt, class _Elem, class _Tr>
   4302 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::pos_type
   4303 wbuffer_convert<_Codecvt, _Elem, _Tr>::seekoff(off_type __off, ios_base::seekdir __way,
   4304                                         ios_base::openmode __om)
   4305 {
   4306     int __width = __cv_->encoding();
   4307     if (__cv_ == 0 || __bufptr_ == 0 || (__width <= 0 && __off != 0) || sync())
   4308         return pos_type(off_type(-1));
   4309     // __width > 0 || __off == 0
   4310     switch (__way)
   4311     {
   4312     case ios_base::beg:
   4313         break;
   4314     case ios_base::cur:
   4315         break;
   4316     case ios_base::end:
   4317         break;
   4318     default:
   4319         return pos_type(off_type(-1));
   4320     }
   4321     pos_type __r = __bufptr_->pubseekoff(__width * __off, __way, __om);
   4322     __r.state(__st_);
   4323     return __r;
   4324 }
   4325 
   4326 template <class _Codecvt, class _Elem, class _Tr>
   4327 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::pos_type
   4328 wbuffer_convert<_Codecvt, _Elem, _Tr>::seekpos(pos_type __sp, ios_base::openmode __wch)
   4329 {
   4330     if (__cv_ == 0 || __bufptr_ == 0 || sync())
   4331         return pos_type(off_type(-1));
   4332     if (__bufptr_->pubseekpos(__sp, __wch) == pos_type(off_type(-1)))
   4333         return pos_type(off_type(-1));
   4334     return __sp;
   4335 }
   4336 
   4337 template <class _Codecvt, class _Elem, class _Tr>
   4338 int
   4339 wbuffer_convert<_Codecvt, _Elem, _Tr>::sync()
   4340 {
   4341     if (__cv_ == 0 || __bufptr_ == 0)
   4342         return 0;
   4343     if (__cm_ & ios_base::out)
   4344     {
   4345         if (this->pptr() != this->pbase())
   4346             if (overflow() == traits_type::eof())
   4347                 return -1;
   4348         codecvt_base::result __r;
   4349         do
   4350         {
   4351             char* __extbe;
   4352             __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe);
   4353             streamsize __nmemb = static_cast<streamsize>(__extbe - __extbuf_);
   4354             if (__bufptr_->sputn(__extbuf_, __nmemb) != __nmemb)
   4355                 return -1;
   4356         } while (__r == codecvt_base::partial);
   4357         if (__r == codecvt_base::error)
   4358             return -1;
   4359         if (__bufptr_->pubsync())
   4360             return -1;
   4361     }
   4362     else if (__cm_ & ios_base::in)
   4363     {
   4364         off_type __c;
   4365         if (__always_noconv_)
   4366             __c = this->egptr() - this->gptr();
   4367         else
   4368         {
   4369             int __width = __cv_->encoding();
   4370             __c = __extbufend_ - __extbufnext_;
   4371             if (__width > 0)
   4372                 __c += __width * (this->egptr() - this->gptr());
   4373             else
   4374             {
   4375                 if (this->gptr() != this->egptr())
   4376                 {
   4377                     reverse(this->gptr(), this->egptr());
   4378                     codecvt_base::result __r;
   4379                     const char_type* __e = this->gptr();
   4380                     char* __extbe;
   4381                     do
   4382                     {
   4383                         __r = __cv_->out(__st_, __e, this->egptr(), __e,
   4384                                          __extbuf_, __extbuf_ + __ebs_, __extbe);
   4385                         switch (__r)
   4386                         {
   4387                         case codecvt_base::noconv:
   4388                             __c += this->egptr() - this->gptr();
   4389                             break;
   4390                         case codecvt_base::ok:
   4391                         case codecvt_base::partial:
   4392                             __c += __extbe - __extbuf_;
   4393                             break;
   4394                         default:
   4395                             return -1;
   4396                         }
   4397                     } while (__r == codecvt_base::partial);
   4398                 }
   4399             }
   4400         }
   4401         if (__bufptr_->pubseekoff(-__c, ios_base::cur, __cm_) == pos_type(off_type(-1)))
   4402             return -1;
   4403         this->setg(0, 0, 0);
   4404         __cm_ = 0;
   4405     }
   4406     return 0;
   4407 }
   4408 
   4409 template <class _Codecvt, class _Elem, class _Tr>
   4410 bool
   4411 wbuffer_convert<_Codecvt, _Elem, _Tr>::__read_mode()
   4412 {
   4413     if (!(__cm_ & ios_base::in))
   4414     {
   4415         this->setp(0, 0);
   4416         if (__always_noconv_)
   4417             this->setg((char_type*)__extbuf_,
   4418                        (char_type*)__extbuf_ + __ebs_,
   4419                        (char_type*)__extbuf_ + __ebs_);
   4420         else
   4421             this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_);
   4422         __cm_ = ios_base::in;
   4423         return true;
   4424     }
   4425     return false;
   4426 }
   4427 
   4428 template <class _Codecvt, class _Elem, class _Tr>
   4429 void
   4430 wbuffer_convert<_Codecvt, _Elem, _Tr>::__write_mode()
   4431 {
   4432     if (!(__cm_ & ios_base::out))
   4433     {
   4434         this->setg(0, 0, 0);
   4435         if (__ebs_ > sizeof(__extbuf_min_))
   4436         {
   4437             if (__always_noconv_)
   4438                 this->setp((char_type*)__extbuf_,
   4439                            (char_type*)__extbuf_ + (__ebs_ - 1));
   4440             else
   4441                 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1));
   4442         }
   4443         else
   4444             this->setp(0, 0);
   4445         __cm_ = ios_base::out;
   4446     }
   4447 }
   4448 
   4449 template <class _Codecvt, class _Elem, class _Tr>
   4450 wbuffer_convert<_Codecvt, _Elem, _Tr>*
   4451 wbuffer_convert<_Codecvt, _Elem, _Tr>::__close()
   4452 {
   4453     wbuffer_convert* __rt = 0;
   4454     if (__cv_ != 0 && __bufptr_ != 0)
   4455     {
   4456         __rt = this;
   4457         if ((__cm_ & ios_base::out) && sync())
   4458             __rt = 0;
   4459     }
   4460     return __rt;
   4461 }
   4462 
   4463 _LIBCPP_END_NAMESPACE_STD
   4464 
   4465 #endif  // _LIBCPP_LOCALE
   4466