ios revision 300770 
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_TYPE_VIS 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_TYPE_VIS_ONLY is_error_code_enum<io_errc> : public true_type { };
397
398#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
399template <>
400struct _LIBCPP_TYPE_VIS_ONLY 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
575template <class _CharT, class _Traits>
576class _LIBCPP_TYPE_VIS_ONLY basic_ios
577    : public ios_base
578{
579public:
580    // types:
581    typedef _CharT char_type;
582    typedef _Traits traits_type;
583
584    typedef typename traits_type::int_type int_type;
585    typedef typename traits_type::pos_type pos_type;
586    typedef typename traits_type::off_type off_type;
587
588    _LIBCPP_ALWAYS_INLINE
589        _LIBCPP_EXPLICIT
590        operator bool() const {return !fail();}
591    _LIBCPP_ALWAYS_INLINE bool operator!() const    {return  fail();}
592    _LIBCPP_ALWAYS_INLINE iostate rdstate() const   {return ios_base::rdstate();}
593    _LIBCPP_ALWAYS_INLINE void clear(iostate __state = goodbit) {ios_base::clear(__state);}
594    _LIBCPP_ALWAYS_INLINE void setstate(iostate __state) {ios_base::setstate(__state);}
595    _LIBCPP_ALWAYS_INLINE bool good() const {return ios_base::good();}
596    _LIBCPP_ALWAYS_INLINE bool eof() const  {return ios_base::eof();}
597    _LIBCPP_ALWAYS_INLINE bool fail() const {return ios_base::fail();}
598    _LIBCPP_ALWAYS_INLINE bool bad() const  {return ios_base::bad();}
599
600    _LIBCPP_ALWAYS_INLINE iostate exceptions() const {return ios_base::exceptions();}
601    _LIBCPP_ALWAYS_INLINE void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
602
603    // 27.5.4.1 Constructor/destructor:
604    _LIBCPP_INLINE_VISIBILITY
605    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
606    virtual ~basic_ios();
607
608    // 27.5.4.2 Members:
609    _LIBCPP_INLINE_VISIBILITY 
610    basic_ostream<char_type, traits_type>* tie() const;
611    _LIBCPP_INLINE_VISIBILITY 
612    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
613
614    _LIBCPP_INLINE_VISIBILITY 
615    basic_streambuf<char_type, traits_type>* rdbuf() const;
616    _LIBCPP_INLINE_VISIBILITY 
617    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
618
619    basic_ios& copyfmt(const basic_ios& __rhs);
620
621    _LIBCPP_INLINE_VISIBILITY 
622    char_type fill() const;
623    _LIBCPP_INLINE_VISIBILITY 
624    char_type fill(char_type __ch);
625
626    _LIBCPP_INLINE_VISIBILITY 
627    locale imbue(const locale& __loc);
628
629    _LIBCPP_INLINE_VISIBILITY 
630    char narrow(char_type __c, char __dfault) const;
631    _LIBCPP_INLINE_VISIBILITY 
632    char_type widen(char __c) const;
633
634protected:
635    _LIBCPP_ALWAYS_INLINE
636    basic_ios() {// purposefully does no initialization
637                }
638    _LIBCPP_INLINE_VISIBILITY 
639    void init(basic_streambuf<char_type, traits_type>* __sb);
640
641    _LIBCPP_INLINE_VISIBILITY 
642    void move(basic_ios& __rhs);
643#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
644    _LIBCPP_ALWAYS_INLINE
645    void move(basic_ios&& __rhs) {move(__rhs);}
646#endif
647    _LIBCPP_INLINE_VISIBILITY 
648    void swap(basic_ios& __rhs) _NOEXCEPT;
649    _LIBCPP_INLINE_VISIBILITY 
650    void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
651private:
652    basic_ostream<char_type, traits_type>* __tie_;
653     mutable int_type __fill_;
654};
655
656template <class _CharT, class _Traits>
657inline _LIBCPP_INLINE_VISIBILITY
658basic_ios<_CharT, _Traits>::basic_ios(basic_streambuf<char_type,traits_type>* __sb)
659{
660    init(__sb);
661}
662
663template <class _CharT, class _Traits>
664basic_ios<_CharT, _Traits>::~basic_ios()
665{
666}
667
668template <class _CharT, class _Traits>
669inline _LIBCPP_INLINE_VISIBILITY
670void
671basic_ios<_CharT, _Traits>::init(basic_streambuf<char_type, traits_type>* __sb)
672{
673    ios_base::init(__sb);
674    __tie_ = 0;
675    __fill_ = traits_type::eof();
676}
677
678template <class _CharT, class _Traits>
679inline _LIBCPP_INLINE_VISIBILITY
680basic_ostream<_CharT, _Traits>*
681basic_ios<_CharT, _Traits>::tie() const
682{
683    return __tie_;
684}
685
686template <class _CharT, class _Traits>
687inline _LIBCPP_INLINE_VISIBILITY
688basic_ostream<_CharT, _Traits>*
689basic_ios<_CharT, _Traits>::tie(basic_ostream<char_type, traits_type>* __tiestr)
690{
691    basic_ostream<char_type, traits_type>* __r = __tie_;
692    __tie_ = __tiestr;
693    return __r;
694}
695
696template <class _CharT, class _Traits>
697inline _LIBCPP_INLINE_VISIBILITY
698basic_streambuf<_CharT, _Traits>*
699basic_ios<_CharT, _Traits>::rdbuf() const
700{
701    return static_cast<basic_streambuf<char_type, traits_type>*>(ios_base::rdbuf());
702}
703
704template <class _CharT, class _Traits>
705inline _LIBCPP_INLINE_VISIBILITY
706basic_streambuf<_CharT, _Traits>*
707basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<char_type, traits_type>* __sb)
708{
709    basic_streambuf<char_type, traits_type>* __r = rdbuf();
710    ios_base::rdbuf(__sb);
711    return __r;
712}
713
714template <class _CharT, class _Traits>
715inline _LIBCPP_INLINE_VISIBILITY
716locale
717basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
718{
719    locale __r = getloc();
720    ios_base::imbue(__loc);
721    if (rdbuf())
722        rdbuf()->pubimbue(__loc);
723    return __r;
724}
725
726template <class _CharT, class _Traits>
727inline _LIBCPP_INLINE_VISIBILITY
728char
729basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
730{
731    return use_facet<ctype<char_type> >(getloc()).narrow(__c, __dfault);
732}
733
734template <class _CharT, class _Traits>
735inline _LIBCPP_INLINE_VISIBILITY
736_CharT
737basic_ios<_CharT, _Traits>::widen(char __c) const
738{
739    return use_facet<ctype<char_type> >(getloc()).widen(__c);
740}
741
742template <class _CharT, class _Traits>
743inline _LIBCPP_INLINE_VISIBILITY
744_CharT
745basic_ios<_CharT, _Traits>::fill() const
746{
747    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
748        __fill_ = widen(' ');
749    return __fill_;
750}
751
752template <class _CharT, class _Traits>
753inline _LIBCPP_INLINE_VISIBILITY
754_CharT
755basic_ios<_CharT, _Traits>::fill(char_type __ch)
756{
757    char_type __r = __fill_;
758    __fill_ = __ch;
759    return __r;
760}
761
762template <class _CharT, class _Traits>
763basic_ios<_CharT, _Traits>&
764basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
765{
766    if (this != &__rhs)
767    {
768        __call_callbacks(erase_event);
769        ios_base::copyfmt(__rhs);
770        __tie_ = __rhs.__tie_;
771        __fill_ = __rhs.__fill_;
772        __call_callbacks(copyfmt_event);
773        exceptions(__rhs.exceptions());
774    }
775    return *this;
776}
777
778template <class _CharT, class _Traits>
779inline _LIBCPP_INLINE_VISIBILITY
780void
781basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
782{
783    ios_base::move(__rhs);
784    __tie_ = __rhs.__tie_;
785    __rhs.__tie_ = 0;
786    __fill_ = __rhs.__fill_;
787}
788
789template <class _CharT, class _Traits>
790inline _LIBCPP_INLINE_VISIBILITY
791void
792basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
793{
794    ios_base::swap(__rhs);
795    _VSTD::swap(__tie_, __rhs.__tie_);
796    _VSTD::swap(__fill_, __rhs.__fill_);
797}
798
799template <class _CharT, class _Traits>
800inline _LIBCPP_INLINE_VISIBILITY
801void
802basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
803{
804    ios_base::set_rdbuf(__sb);
805}
806
807inline _LIBCPP_INLINE_VISIBILITY
808ios_base&
809boolalpha(ios_base& __str)
810{
811    __str.setf(ios_base::boolalpha);
812    return __str;
813}
814
815inline _LIBCPP_INLINE_VISIBILITY
816ios_base&
817noboolalpha(ios_base& __str)
818{
819    __str.unsetf(ios_base::boolalpha);
820    return __str;
821}
822
823inline _LIBCPP_INLINE_VISIBILITY
824ios_base&
825showbase(ios_base& __str)
826{
827    __str.setf(ios_base::showbase);
828    return __str;
829}
830
831inline _LIBCPP_INLINE_VISIBILITY
832ios_base&
833noshowbase(ios_base& __str)
834{
835    __str.unsetf(ios_base::showbase);
836    return __str;
837}
838
839inline _LIBCPP_INLINE_VISIBILITY
840ios_base&
841showpoint(ios_base& __str)
842{
843    __str.setf(ios_base::showpoint);
844    return __str;
845}
846
847inline _LIBCPP_INLINE_VISIBILITY
848ios_base&
849noshowpoint(ios_base& __str)
850{
851    __str.unsetf(ios_base::showpoint);
852    return __str;
853}
854
855inline _LIBCPP_INLINE_VISIBILITY
856ios_base&
857showpos(ios_base& __str)
858{
859    __str.setf(ios_base::showpos);
860    return __str;
861}
862
863inline _LIBCPP_INLINE_VISIBILITY
864ios_base&
865noshowpos(ios_base& __str)
866{
867    __str.unsetf(ios_base::showpos);
868    return __str;
869}
870
871inline _LIBCPP_INLINE_VISIBILITY
872ios_base&
873skipws(ios_base& __str)
874{
875    __str.setf(ios_base::skipws);
876    return __str;
877}
878
879inline _LIBCPP_INLINE_VISIBILITY
880ios_base&
881noskipws(ios_base& __str)
882{
883    __str.unsetf(ios_base::skipws);
884    return __str;
885}
886
887inline _LIBCPP_INLINE_VISIBILITY
888ios_base&
889uppercase(ios_base& __str)
890{
891    __str.setf(ios_base::uppercase);
892    return __str;
893}
894
895inline _LIBCPP_INLINE_VISIBILITY
896ios_base&
897nouppercase(ios_base& __str)
898{
899    __str.unsetf(ios_base::uppercase);
900    return __str;
901}
902
903inline _LIBCPP_INLINE_VISIBILITY
904ios_base&
905unitbuf(ios_base& __str)
906{
907    __str.setf(ios_base::unitbuf);
908    return __str;
909}
910
911inline _LIBCPP_INLINE_VISIBILITY
912ios_base&
913nounitbuf(ios_base& __str)
914{
915    __str.unsetf(ios_base::unitbuf);
916    return __str;
917}
918
919inline _LIBCPP_INLINE_VISIBILITY
920ios_base&
921internal(ios_base& __str)
922{
923    __str.setf(ios_base::internal, ios_base::adjustfield);
924    return __str;
925}
926
927inline _LIBCPP_INLINE_VISIBILITY
928ios_base&
929left(ios_base& __str)
930{
931    __str.setf(ios_base::left, ios_base::adjustfield);
932    return __str;
933}
934
935inline _LIBCPP_INLINE_VISIBILITY
936ios_base&
937right(ios_base& __str)
938{
939    __str.setf(ios_base::right, ios_base::adjustfield);
940    return __str;
941}
942
943inline _LIBCPP_INLINE_VISIBILITY
944ios_base&
945dec(ios_base& __str)
946{
947    __str.setf(ios_base::dec, ios_base::basefield);
948    return __str;
949}
950
951inline _LIBCPP_INLINE_VISIBILITY
952ios_base&
953hex(ios_base& __str)
954{
955    __str.setf(ios_base::hex, ios_base::basefield);
956    return __str;
957}
958
959inline _LIBCPP_INLINE_VISIBILITY
960ios_base&
961oct(ios_base& __str)
962{
963    __str.setf(ios_base::oct, ios_base::basefield);
964    return __str;
965}
966
967inline _LIBCPP_INLINE_VISIBILITY
968ios_base&
969fixed(ios_base& __str)
970{
971    __str.setf(ios_base::fixed, ios_base::floatfield);
972    return __str;
973}
974
975inline _LIBCPP_INLINE_VISIBILITY
976ios_base&
977scientific(ios_base& __str)
978{
979    __str.setf(ios_base::scientific, ios_base::floatfield);
980    return __str;
981}
982
983inline _LIBCPP_INLINE_VISIBILITY
984ios_base&
985hexfloat(ios_base& __str)
986{
987    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
988    return __str;
989}
990
991inline _LIBCPP_INLINE_VISIBILITY
992ios_base&
993defaultfloat(ios_base& __str)
994{
995    __str.unsetf(ios_base::floatfield);
996    return __str;
997}
998
999template <class _CharT, class _Traits>
1000class __save_flags
1001{
1002    typedef basic_ios<_CharT, _Traits> __stream_type;
1003    typedef typename __stream_type::fmtflags fmtflags;
1004
1005    __stream_type& __stream_;
1006    fmtflags       __fmtflags_;
1007    _CharT         __fill_;
1008
1009    __save_flags(const __save_flags&);
1010    __save_flags& operator=(const __save_flags&);
1011public:
1012    _LIBCPP_INLINE_VISIBILITY
1013    explicit __save_flags(__stream_type& __stream)
1014        : __stream_(__stream),
1015          __fmtflags_(__stream.flags()),
1016          __fill_(__stream.fill())
1017        {}
1018    _LIBCPP_INLINE_VISIBILITY
1019    ~__save_flags()
1020    {
1021        __stream_.flags(__fmtflags_);
1022        __stream_.fill(__fill_);
1023    }
1024};
1025
1026_LIBCPP_END_NAMESPACE_STD
1027
1028#endif  // _LIBCPP_IOS
1029