xref: /freebsd-12.1/contrib/libc++/include/ios (revision ffec3151) 
1// -*- C++ -*-
2//===---------------------------- ios -------------------------------------===//
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_IOS
12#define _LIBCPP_IOS
13
14/*
15    ios synopsis
16
17#include <iosfwd>
18
19namespace std
20{
21
22typedef OFF_T streamoff;
23typedef SZ_T streamsize;
24template <class stateT> class fpos;
25
26class ios_base
27{
28public:
29    class failure;
30
31    typedef T1 fmtflags;
32    static constexpr fmtflags boolalpha;
33    static constexpr fmtflags dec;
34    static constexpr fmtflags fixed;
35    static constexpr fmtflags hex;
36    static constexpr fmtflags internal;
37    static constexpr fmtflags left;
38    static constexpr fmtflags oct;
39    static constexpr fmtflags right;
40    static constexpr fmtflags scientific;
41    static constexpr fmtflags showbase;
42    static constexpr fmtflags showpoint;
43    static constexpr fmtflags showpos;
44    static constexpr fmtflags skipws;
45    static constexpr fmtflags unitbuf;
46    static constexpr fmtflags uppercase;
47    static constexpr fmtflags adjustfield;
48    static constexpr fmtflags basefield;
49    static constexpr fmtflags floatfield;
50
51    typedef T2 iostate;
52    static constexpr iostate badbit;
53    static constexpr iostate eofbit;
54    static constexpr iostate failbit;
55    static constexpr iostate goodbit;
56
57    typedef T3 openmode;
58    static constexpr openmode app;
59    static constexpr openmode ate;
60    static constexpr openmode binary;
61    static constexpr openmode in;
62    static constexpr openmode out;
63    static constexpr openmode trunc;
64
65    typedef T4 seekdir;
66    static constexpr seekdir beg;
67    static constexpr seekdir cur;
68    static constexpr seekdir end;
69
70    class Init;
71
72    // 27.5.2.2 fmtflags state:
73    fmtflags flags() const;
74    fmtflags flags(fmtflags fmtfl);
75    fmtflags setf(fmtflags fmtfl);
76    fmtflags setf(fmtflags fmtfl, fmtflags mask);
77    void unsetf(fmtflags mask);
78
79    streamsize precision() const;
80    streamsize precision(streamsize prec);
81    streamsize width() const;
82    streamsize width(streamsize wide);
83
84    // 27.5.2.3 locales:
85    locale imbue(const locale& loc);
86    locale getloc() const;
87
88    // 27.5.2.5 storage:
89    static int xalloc();
90    long& iword(int index);
91    void*& pword(int index);
92
93    // destructor
94    virtual ~ios_base();
95
96    // 27.5.2.6 callbacks;
97    enum event { erase_event, imbue_event, copyfmt_event };
98    typedef void (*event_callback)(event, ios_base&, int index);
99    void register_callback(event_callback fn, int index);
100
101    ios_base(const ios_base&) = delete;
102    ios_base& operator=(const ios_base&) = delete;
103
104    static bool sync_with_stdio(bool sync = true);
105
106protected:
107    ios_base();
108};
109
110template <class charT, class traits = char_traits<charT> >
111class basic_ios
112    : public ios_base
113{
114public:
115    // types:
116    typedef charT char_type;
117    typedef typename traits::int_type int_type;  // removed in C++17
118    typedef typename traits::pos_type pos_type;  // removed in C++17
119    typedef typename traits::off_type off_type;  // removed in C++17
120    typedef traits traits_type;
121
122    operator unspecified-bool-type() const;
123    bool operator!() const;
124    iostate rdstate() const;
125    void clear(iostate state = goodbit);
126    void setstate(iostate state);
127    bool good() const;
128    bool eof() const;
129    bool fail() const;
130    bool bad() const;
131
132    iostate exceptions() const;
133    void exceptions(iostate except);
134
135    // 27.5.4.1 Constructor/destructor:
136    explicit basic_ios(basic_streambuf<charT,traits>* sb);
137    virtual ~basic_ios();
138
139    // 27.5.4.2 Members:
140    basic_ostream<charT,traits>* tie() const;
141    basic_ostream<charT,traits>* tie(basic_ostream<charT,traits>* tiestr);
142
143    basic_streambuf<charT,traits>* rdbuf() const;
144    basic_streambuf<charT,traits>* rdbuf(basic_streambuf<charT,traits>* sb);
145
146    basic_ios& copyfmt(const basic_ios& rhs);
147
148    char_type fill() const;
149    char_type fill(char_type ch);
150
151    locale imbue(const locale& loc);
152
153    char narrow(char_type c, char dfault) const;
154    char_type widen(char c) const;
155
156    basic_ios(const basic_ios& ) = delete;
157    basic_ios& operator=(const basic_ios&) = delete;
158
159protected:
160    basic_ios();
161    void init(basic_streambuf<charT,traits>* sb);
162    void move(basic_ios& rhs);
163    void swap(basic_ios& rhs) noexcept;
164    void set_rdbuf(basic_streambuf<charT, traits>* sb);
165};
166
167// 27.5.5, manipulators:
168ios_base& boolalpha (ios_base& str);
169ios_base& noboolalpha(ios_base& str);
170ios_base& showbase (ios_base& str);
171ios_base& noshowbase (ios_base& str);
172ios_base& showpoint (ios_base& str);
173ios_base& noshowpoint(ios_base& str);
174ios_base& showpos (ios_base& str);
175ios_base& noshowpos (ios_base& str);
176ios_base& skipws (ios_base& str);
177ios_base& noskipws (ios_base& str);
178ios_base& uppercase (ios_base& str);
179ios_base& nouppercase(ios_base& str);
180ios_base& unitbuf (ios_base& str);
181ios_base& nounitbuf (ios_base& str);
182
183// 27.5.5.2 adjustfield:
184ios_base& internal (ios_base& str);
185ios_base& left (ios_base& str);
186ios_base& right (ios_base& str);
187
188// 27.5.5.3 basefield:
189ios_base& dec (ios_base& str);
190ios_base& hex (ios_base& str);
191ios_base& oct (ios_base& str);
192
193// 27.5.5.4 floatfield:
194ios_base& fixed (ios_base& str);
195ios_base& scientific (ios_base& str);
196ios_base& hexfloat (ios_base& str);
197ios_base& defaultfloat(ios_base& str);
198
199// 27.5.5.5 error reporting:
200enum class io_errc
201{
202    stream = 1
203};
204
205concept_map ErrorCodeEnum<io_errc> { };
206error_code make_error_code(io_errc e) noexcept;
207error_condition make_error_condition(io_errc e) noexcept;
208storage-class-specifier const error_category& iostream_category() noexcept;
209
210}  // std
211
212*/
213
214#include <__config>
215#include <iosfwd>
216#include <__locale>
217#include <system_error>
218
219#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
220#include <atomic>     // for __xindex_
221#endif
222
223#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
224#pragma GCC system_header
225#endif
226
227_LIBCPP_BEGIN_NAMESPACE_STD
228
229typedef ptrdiff_t streamsize;
230
231class _LIBCPP_TYPE_VIS ios_base
232{
233public:
234    class _LIBCPP_EXCEPTION_ABI failure;
235
236    typedef unsigned int fmtflags;
237    static const fmtflags boolalpha   = 0x0001;
238    static const fmtflags dec         = 0x0002;
239    static const fmtflags fixed       = 0x0004;
240    static const fmtflags hex         = 0x0008;
241    static const fmtflags internal    = 0x0010;
242    static const fmtflags left        = 0x0020;
243    static const fmtflags oct         = 0x0040;
244    static const fmtflags right       = 0x0080;
245    static const fmtflags scientific  = 0x0100;
246    static const fmtflags showbase    = 0x0200;
247    static const fmtflags showpoint   = 0x0400;
248    static const fmtflags showpos     = 0x0800;
249    static const fmtflags skipws      = 0x1000;
250    static const fmtflags unitbuf     = 0x2000;
251    static const fmtflags uppercase   = 0x4000;
252    static const fmtflags adjustfield = left | right | internal;
253    static const fmtflags basefield   = dec | oct | hex;
254    static const fmtflags floatfield  = scientific | fixed;
255
256    typedef unsigned int iostate;
257    static const iostate badbit  = 0x1;
258    static const iostate eofbit  = 0x2;
259    static const iostate failbit = 0x4;
260    static const iostate goodbit = 0x0;
261
262    typedef unsigned int openmode;
263    static const openmode app    = 0x01;
264    static const openmode ate    = 0x02;
265    static const openmode binary = 0x04;
266    static const openmode in     = 0x08;
267    static const openmode out    = 0x10;
268    static const openmode trunc  = 0x20;
269
270    enum seekdir {beg, cur, end};
271
272#if _LIBCPP_STD_VER <= 14
273    typedef iostate      io_state;
274    typedef openmode     open_mode;
275    typedef seekdir      seek_dir;
276
277    typedef _VSTD::streamoff streamoff;
278    typedef _VSTD::streampos streampos;
279#endif
280
281    class _LIBCPP_TYPE_VIS Init;
282
283    // 27.5.2.2 fmtflags state:
284    _LIBCPP_INLINE_VISIBILITY fmtflags flags() const;
285    _LIBCPP_INLINE_VISIBILITY fmtflags flags(fmtflags __fmtfl);
286    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl);
287    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl, fmtflags __mask);
288    _LIBCPP_INLINE_VISIBILITY void unsetf(fmtflags __mask);
289
290    _LIBCPP_INLINE_VISIBILITY streamsize precision() const;
291    _LIBCPP_INLINE_VISIBILITY streamsize precision(streamsize __prec);
292    _LIBCPP_INLINE_VISIBILITY streamsize width() const;
293    _LIBCPP_INLINE_VISIBILITY streamsize width(streamsize __wide);
294
295    // 27.5.2.3 locales:
296    locale imbue(const locale& __loc);
297    locale getloc() const;
298
299    // 27.5.2.5 storage:
300    static int xalloc();
301    long& iword(int __index);
302    void*& pword(int __index);
303
304    // destructor
305    virtual ~ios_base();
306
307    // 27.5.2.6 callbacks;
308    enum event { erase_event, imbue_event, copyfmt_event };
309    typedef void (*event_callback)(event, ios_base&, int __index);
310    void register_callback(event_callback __fn, int __index);
311
312private:
313    ios_base(const ios_base&); // = delete;
314    ios_base& operator=(const ios_base&); // = delete;
315
316public:
317    static bool sync_with_stdio(bool __sync = true);
318
319    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const;
320    void clear(iostate __state = goodbit);
321    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state);
322
323    _LIBCPP_INLINE_VISIBILITY bool good() const;
324    _LIBCPP_INLINE_VISIBILITY bool eof() const;
325    _LIBCPP_INLINE_VISIBILITY bool fail() const;
326    _LIBCPP_INLINE_VISIBILITY bool bad() const;
327
328    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const;
329    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate);
330
331    void __set_badbit_and_consider_rethrow();
332    void __set_failbit_and_consider_rethrow();
333
334protected:
335    _LIBCPP_INLINE_VISIBILITY
336    ios_base() {// purposefully does no initialization
337               }
338
339    void init(void* __sb);
340    _LIBCPP_ALWAYS_INLINE void* rdbuf() const {return __rdbuf_;}
341
342    _LIBCPP_ALWAYS_INLINE
343    void rdbuf(void* __sb)
344    {
345        __rdbuf_ = __sb;
346        clear();
347    }
348
349    void __call_callbacks(event);
350    void copyfmt(const ios_base&);
351    void move(ios_base&);
352    void swap(ios_base&) _NOEXCEPT;
353
354    _LIBCPP_ALWAYS_INLINE
355    void set_rdbuf(void* __sb)
356    {
357        __rdbuf_ = __sb;
358    }
359
360private:
361    // All data members must be scalars
362    fmtflags        __fmtflags_;
363    streamsize      __precision_;
364    streamsize      __width_;
365    iostate         __rdstate_;
366    iostate         __exceptions_;
367    void*           __rdbuf_;
368    void*           __loc_;
369    event_callback* __fn_;
370    int*            __index_;
371    size_t          __event_size_;
372    size_t          __event_cap_;
373// TODO(EricWF): Enable this for both Clang and GCC. Currently it is only
374// enabled with clang.
375#if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
376    static atomic<int> __xindex_;
377#else
378    static int      __xindex_;
379#endif
380    long*           __iarray_;
381    size_t          __iarray_size_;
382    size_t          __iarray_cap_;
383    void**          __parray_;
384    size_t          __parray_size_;
385    size_t          __parray_cap_;
386};
387
388//enum class io_errc
389_LIBCPP_DECLARE_STRONG_ENUM(io_errc)
390{
391    stream = 1
392};
393_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(io_errc)
394
395template <>
396struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc> : public true_type { };
397
398#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
399template <>
400struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc::__lx> : public true_type { };
401#endif
402
403_LIBCPP_FUNC_VIS
404const error_category& iostream_category() _NOEXCEPT;
405
406inline _LIBCPP_INLINE_VISIBILITY
407error_code
408make_error_code(io_errc __e) _NOEXCEPT
409{
410    return error_code(static_cast<int>(__e), iostream_category());
411}
412
413inline _LIBCPP_INLINE_VISIBILITY
414error_condition
415make_error_condition(io_errc __e) _NOEXCEPT
416{
417    return error_condition(static_cast<int>(__e), iostream_category());
418}
419
420class _LIBCPP_EXCEPTION_ABI ios_base::failure
421    : public system_error
422{
423public:
424    explicit failure(const string& __msg, const error_code& __ec = io_errc::stream);
425    explicit failure(const char* __msg, const error_code& __ec = io_errc::stream);
426    virtual ~failure() throw();
427};
428
429class _LIBCPP_TYPE_VIS ios_base::Init
430{
431public:
432    Init();
433    ~Init();
434};
435
436// fmtflags
437
438inline _LIBCPP_INLINE_VISIBILITY
439ios_base::fmtflags
440ios_base::flags() const
441{
442    return __fmtflags_;
443}
444
445inline _LIBCPP_INLINE_VISIBILITY
446ios_base::fmtflags
447ios_base::flags(fmtflags __fmtfl)
448{
449    fmtflags __r = __fmtflags_;
450    __fmtflags_ = __fmtfl;
451    return __r;
452}
453
454inline _LIBCPP_INLINE_VISIBILITY
455ios_base::fmtflags
456ios_base::setf(fmtflags __fmtfl)
457{
458    fmtflags __r = __fmtflags_;
459    __fmtflags_ |= __fmtfl;
460    return __r;
461}
462
463inline _LIBCPP_INLINE_VISIBILITY
464void
465ios_base::unsetf(fmtflags __mask)
466{
467    __fmtflags_ &= ~__mask;
468}
469
470inline _LIBCPP_INLINE_VISIBILITY
471ios_base::fmtflags
472ios_base::setf(fmtflags __fmtfl, fmtflags __mask)
473{
474    fmtflags __r = __fmtflags_;
475    unsetf(__mask);
476    __fmtflags_ |= __fmtfl & __mask;
477    return __r;
478}
479
480// precision
481
482inline _LIBCPP_INLINE_VISIBILITY
483streamsize
484ios_base::precision() const
485{
486    return __precision_;
487}
488
489inline _LIBCPP_INLINE_VISIBILITY
490streamsize
491ios_base::precision(streamsize __prec)
492{
493    streamsize __r = __precision_;
494    __precision_ = __prec;
495    return __r;
496}
497
498// width
499
500inline _LIBCPP_INLINE_VISIBILITY
501streamsize
502ios_base::width() const
503{
504    return __width_;
505}
506
507inline _LIBCPP_INLINE_VISIBILITY
508streamsize
509ios_base::width(streamsize __wide)
510{
511    streamsize __r = __width_;
512    __width_ = __wide;
513    return __r;
514}
515
516// iostate
517
518inline _LIBCPP_INLINE_VISIBILITY
519ios_base::iostate
520ios_base::rdstate() const
521{
522    return __rdstate_;
523}
524
525inline _LIBCPP_INLINE_VISIBILITY
526void
527ios_base::setstate(iostate __state)
528{
529    clear(__rdstate_ | __state);
530}
531
532inline _LIBCPP_INLINE_VISIBILITY
533bool
534ios_base::good() const
535{
536    return __rdstate_ == 0;
537}
538
539inline _LIBCPP_INLINE_VISIBILITY
540bool
541ios_base::eof() const
542{
543    return (__rdstate_ & eofbit) != 0;
544}
545
546inline _LIBCPP_INLINE_VISIBILITY
547bool
548ios_base::fail() const
549{
550    return (__rdstate_ & (failbit | badbit)) != 0;
551}
552
553inline _LIBCPP_INLINE_VISIBILITY
554bool
555ios_base::bad() const
556{
557    return (__rdstate_ & badbit) != 0;
558}
559
560inline _LIBCPP_INLINE_VISIBILITY
561ios_base::iostate
562ios_base::exceptions() const
563{
564    return __exceptions_;
565}
566
567inline _LIBCPP_INLINE_VISIBILITY
568void
569ios_base::exceptions(iostate __iostate)
570{
571    __exceptions_ = __iostate;
572    clear(__rdstate_);
573}
574
575#if defined(_LIBCPP_CXX03_LANG)
576struct _LIBCPP_TYPE_VIS __cxx03_bool {
577  typedef void (__cxx03_bool::*__bool_type)();
578  void __true_value() {}
579};
580#endif
581
582template <class _CharT, class _Traits>
583class _LIBCPP_TEMPLATE_VIS basic_ios
584    : public ios_base
585{
586public:
587    // types:
588    typedef _CharT char_type;
589    typedef _Traits traits_type;
590
591    typedef typename traits_type::int_type int_type;
592    typedef typename traits_type::pos_type pos_type;
593    typedef typename traits_type::off_type off_type;
594
595#if defined(_LIBCPP_CXX03_LANG)
596    _LIBCPP_ALWAYS_INLINE
597    operator __cxx03_bool::__bool_type() const {
598        return !fail() ? &__cxx03_bool::__true_value : nullptr;
599    }
600#else
601    _LIBCPP_ALWAYS_INLINE
602    _LIBCPP_EXPLICIT operator bool() const {return !fail();}
603#endif
604
605    _LIBCPP_ALWAYS_INLINE bool operator!() const    {return  fail();}
606    _LIBCPP_ALWAYS_INLINE iostate rdstate() const   {return ios_base::rdstate();}
607    _LIBCPP_ALWAYS_INLINE void clear(iostate __state = goodbit) {ios_base::clear(__state);}
608    _LIBCPP_ALWAYS_INLINE void setstate(iostate __state) {ios_base::setstate(__state);}
609    _LIBCPP_ALWAYS_INLINE bool good() const {return ios_base::good();}
610    _LIBCPP_ALWAYS_INLINE bool eof() const  {return ios_base::eof();}
611    _LIBCPP_ALWAYS_INLINE bool fail() const {return ios_base::fail();}
612    _LIBCPP_ALWAYS_INLINE bool bad() const  {return ios_base::bad();}
613
614    _LIBCPP_ALWAYS_INLINE iostate exceptions() const {return ios_base::exceptions();}
615    _LIBCPP_ALWAYS_INLINE void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
616
617    // 27.5.4.1 Constructor/destructor:
618    _LIBCPP_INLINE_VISIBILITY
619    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
620    virtual ~basic_ios();
621
622    // 27.5.4.2 Members:
623    _LIBCPP_INLINE_VISIBILITY
624    basic_ostream<char_type, traits_type>* tie() const;
625    _LIBCPP_INLINE_VISIBILITY
626    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
627
628    _LIBCPP_INLINE_VISIBILITY
629    basic_streambuf<char_type, traits_type>* rdbuf() const;
630    _LIBCPP_INLINE_VISIBILITY
631    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
632
633    basic_ios& copyfmt(const basic_ios& __rhs);
634
635    _LIBCPP_INLINE_VISIBILITY
636    char_type fill() const;
637    _LIBCPP_INLINE_VISIBILITY
638    char_type fill(char_type __ch);
639
640    _LIBCPP_INLINE_VISIBILITY
641    locale imbue(const locale& __loc);
642
643    _LIBCPP_INLINE_VISIBILITY
644    char narrow(char_type __c, char __dfault) const;
645    _LIBCPP_INLINE_VISIBILITY
646    char_type widen(char __c) const;
647
648protected:
649    _LIBCPP_ALWAYS_INLINE
650    basic_ios() {// purposefully does no initialization
651                }
652    _LIBCPP_INLINE_VISIBILITY
653    void init(basic_streambuf<char_type, traits_type>* __sb);
654
655    _LIBCPP_INLINE_VISIBILITY
656    void move(basic_ios& __rhs);
657#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
658    _LIBCPP_ALWAYS_INLINE
659    void move(basic_ios&& __rhs) {move(__rhs);}
660#endif
661    _LIBCPP_INLINE_VISIBILITY
662    void swap(basic_ios& __rhs) _NOEXCEPT;
663    _LIBCPP_INLINE_VISIBILITY
664    void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
665private:
666    basic_ostream<char_type, traits_type>* __tie_;
667     mutable int_type __fill_;
668};
669
670template <class _CharT, class _Traits>
671inline _LIBCPP_INLINE_VISIBILITY
672basic_ios<_CharT, _Traits>::basic_ios(basic_streambuf<char_type,traits_type>* __sb)
673{
674    init(__sb);
675}
676
677template <class _CharT, class _Traits>
678basic_ios<_CharT, _Traits>::~basic_ios()
679{
680}
681
682template <class _CharT, class _Traits>
683inline _LIBCPP_INLINE_VISIBILITY
684void
685basic_ios<_CharT, _Traits>::init(basic_streambuf<char_type, traits_type>* __sb)
686{
687    ios_base::init(__sb);
688    __tie_ = 0;
689    __fill_ = traits_type::eof();
690}
691
692template <class _CharT, class _Traits>
693inline _LIBCPP_INLINE_VISIBILITY
694basic_ostream<_CharT, _Traits>*
695basic_ios<_CharT, _Traits>::tie() const
696{
697    return __tie_;
698}
699
700template <class _CharT, class _Traits>
701inline _LIBCPP_INLINE_VISIBILITY
702basic_ostream<_CharT, _Traits>*
703basic_ios<_CharT, _Traits>::tie(basic_ostream<char_type, traits_type>* __tiestr)
704{
705    basic_ostream<char_type, traits_type>* __r = __tie_;
706    __tie_ = __tiestr;
707    return __r;
708}
709
710template <class _CharT, class _Traits>
711inline _LIBCPP_INLINE_VISIBILITY
712basic_streambuf<_CharT, _Traits>*
713basic_ios<_CharT, _Traits>::rdbuf() const
714{
715    return static_cast<basic_streambuf<char_type, traits_type>*>(ios_base::rdbuf());
716}
717
718template <class _CharT, class _Traits>
719inline _LIBCPP_INLINE_VISIBILITY
720basic_streambuf<_CharT, _Traits>*
721basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<char_type, traits_type>* __sb)
722{
723    basic_streambuf<char_type, traits_type>* __r = rdbuf();
724    ios_base::rdbuf(__sb);
725    return __r;
726}
727
728template <class _CharT, class _Traits>
729inline _LIBCPP_INLINE_VISIBILITY
730locale
731basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
732{
733    locale __r = getloc();
734    ios_base::imbue(__loc);
735    if (rdbuf())
736        rdbuf()->pubimbue(__loc);
737    return __r;
738}
739
740template <class _CharT, class _Traits>
741inline _LIBCPP_INLINE_VISIBILITY
742char
743basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
744{
745    return use_facet<ctype<char_type> >(getloc()).narrow(__c, __dfault);
746}
747
748template <class _CharT, class _Traits>
749inline _LIBCPP_INLINE_VISIBILITY
750_CharT
751basic_ios<_CharT, _Traits>::widen(char __c) const
752{
753    return use_facet<ctype<char_type> >(getloc()).widen(__c);
754}
755
756template <class _CharT, class _Traits>
757inline _LIBCPP_INLINE_VISIBILITY
758_CharT
759basic_ios<_CharT, _Traits>::fill() const
760{
761    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
762        __fill_ = widen(' ');
763    return __fill_;
764}
765
766template <class _CharT, class _Traits>
767inline _LIBCPP_INLINE_VISIBILITY
768_CharT
769basic_ios<_CharT, _Traits>::fill(char_type __ch)
770{
771    char_type __r = __fill_;
772    __fill_ = __ch;
773    return __r;
774}
775
776template <class _CharT, class _Traits>
777basic_ios<_CharT, _Traits>&
778basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
779{
780    if (this != &__rhs)
781    {
782        __call_callbacks(erase_event);
783        ios_base::copyfmt(__rhs);
784        __tie_ = __rhs.__tie_;
785        __fill_ = __rhs.__fill_;
786        __call_callbacks(copyfmt_event);
787        exceptions(__rhs.exceptions());
788    }
789    return *this;
790}
791
792template <class _CharT, class _Traits>
793inline _LIBCPP_INLINE_VISIBILITY
794void
795basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
796{
797    ios_base::move(__rhs);
798    __tie_ = __rhs.__tie_;
799    __rhs.__tie_ = 0;
800    __fill_ = __rhs.__fill_;
801}
802
803template <class _CharT, class _Traits>
804inline _LIBCPP_INLINE_VISIBILITY
805void
806basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
807{
808    ios_base::swap(__rhs);
809    _VSTD::swap(__tie_, __rhs.__tie_);
810    _VSTD::swap(__fill_, __rhs.__fill_);
811}
812
813template <class _CharT, class _Traits>
814inline _LIBCPP_INLINE_VISIBILITY
815void
816basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
817{
818    ios_base::set_rdbuf(__sb);
819}
820
821inline _LIBCPP_INLINE_VISIBILITY
822ios_base&
823boolalpha(ios_base& __str)
824{
825    __str.setf(ios_base::boolalpha);
826    return __str;
827}
828
829inline _LIBCPP_INLINE_VISIBILITY
830ios_base&
831noboolalpha(ios_base& __str)
832{
833    __str.unsetf(ios_base::boolalpha);
834    return __str;
835}
836
837inline _LIBCPP_INLINE_VISIBILITY
838ios_base&
839showbase(ios_base& __str)
840{
841    __str.setf(ios_base::showbase);
842    return __str;
843}
844
845inline _LIBCPP_INLINE_VISIBILITY
846ios_base&
847noshowbase(ios_base& __str)
848{
849    __str.unsetf(ios_base::showbase);
850    return __str;
851}
852
853inline _LIBCPP_INLINE_VISIBILITY
854ios_base&
855showpoint(ios_base& __str)
856{
857    __str.setf(ios_base::showpoint);
858    return __str;
859}
860
861inline _LIBCPP_INLINE_VISIBILITY
862ios_base&
863noshowpoint(ios_base& __str)
864{
865    __str.unsetf(ios_base::showpoint);
866    return __str;
867}
868
869inline _LIBCPP_INLINE_VISIBILITY
870ios_base&
871showpos(ios_base& __str)
872{
873    __str.setf(ios_base::showpos);
874    return __str;
875}
876
877inline _LIBCPP_INLINE_VISIBILITY
878ios_base&
879noshowpos(ios_base& __str)
880{
881    __str.unsetf(ios_base::showpos);
882    return __str;
883}
884
885inline _LIBCPP_INLINE_VISIBILITY
886ios_base&
887skipws(ios_base& __str)
888{
889    __str.setf(ios_base::skipws);
890    return __str;
891}
892
893inline _LIBCPP_INLINE_VISIBILITY
894ios_base&
895noskipws(ios_base& __str)
896{
897    __str.unsetf(ios_base::skipws);
898    return __str;
899}
900
901inline _LIBCPP_INLINE_VISIBILITY
902ios_base&
903uppercase(ios_base& __str)
904{
905    __str.setf(ios_base::uppercase);
906    return __str;
907}
908
909inline _LIBCPP_INLINE_VISIBILITY
910ios_base&
911nouppercase(ios_base& __str)
912{
913    __str.unsetf(ios_base::uppercase);
914    return __str;
915}
916
917inline _LIBCPP_INLINE_VISIBILITY
918ios_base&
919unitbuf(ios_base& __str)
920{
921    __str.setf(ios_base::unitbuf);
922    return __str;
923}
924
925inline _LIBCPP_INLINE_VISIBILITY
926ios_base&
927nounitbuf(ios_base& __str)
928{
929    __str.unsetf(ios_base::unitbuf);
930    return __str;
931}
932
933inline _LIBCPP_INLINE_VISIBILITY
934ios_base&
935internal(ios_base& __str)
936{
937    __str.setf(ios_base::internal, ios_base::adjustfield);
938    return __str;
939}
940
941inline _LIBCPP_INLINE_VISIBILITY
942ios_base&
943left(ios_base& __str)
944{
945    __str.setf(ios_base::left, ios_base::adjustfield);
946    return __str;
947}
948
949inline _LIBCPP_INLINE_VISIBILITY
950ios_base&
951right(ios_base& __str)
952{
953    __str.setf(ios_base::right, ios_base::adjustfield);
954    return __str;
955}
956
957inline _LIBCPP_INLINE_VISIBILITY
958ios_base&
959dec(ios_base& __str)
960{
961    __str.setf(ios_base::dec, ios_base::basefield);
962    return __str;
963}
964
965inline _LIBCPP_INLINE_VISIBILITY
966ios_base&
967hex(ios_base& __str)
968{
969    __str.setf(ios_base::hex, ios_base::basefield);
970    return __str;
971}
972
973inline _LIBCPP_INLINE_VISIBILITY
974ios_base&
975oct(ios_base& __str)
976{
977    __str.setf(ios_base::oct, ios_base::basefield);
978    return __str;
979}
980
981inline _LIBCPP_INLINE_VISIBILITY
982ios_base&
983fixed(ios_base& __str)
984{
985    __str.setf(ios_base::fixed, ios_base::floatfield);
986    return __str;
987}
988
989inline _LIBCPP_INLINE_VISIBILITY
990ios_base&
991scientific(ios_base& __str)
992{
993    __str.setf(ios_base::scientific, ios_base::floatfield);
994    return __str;
995}
996
997inline _LIBCPP_INLINE_VISIBILITY
998ios_base&
999hexfloat(ios_base& __str)
1000{
1001    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
1002    return __str;
1003}
1004
1005inline _LIBCPP_INLINE_VISIBILITY
1006ios_base&
1007defaultfloat(ios_base& __str)
1008{
1009    __str.unsetf(ios_base::floatfield);
1010    return __str;
1011}
1012
1013template <class _CharT, class _Traits>
1014class __save_flags
1015{
1016    typedef basic_ios<_CharT, _Traits> __stream_type;
1017    typedef typename __stream_type::fmtflags fmtflags;
1018
1019    __stream_type& __stream_;
1020    fmtflags       __fmtflags_;
1021    _CharT         __fill_;
1022
1023    __save_flags(const __save_flags&);
1024    __save_flags& operator=(const __save_flags&);
1025public:
1026    _LIBCPP_INLINE_VISIBILITY
1027    explicit __save_flags(__stream_type& __stream)
1028        : __stream_(__stream),
1029          __fmtflags_(__stream.flags()),
1030          __fill_(__stream.fill())
1031        {}
1032    _LIBCPP_INLINE_VISIBILITY
1033    ~__save_flags()
1034    {
1035        __stream_.flags(__fmtflags_);
1036        __stream_.fill(__fill_);
1037    }
1038};
1039
1040_LIBCPP_END_NAMESPACE_STD
1041
1042#endif  // _LIBCPP_IOS
1043