xref: /llvm-project-15.0.7/libcxx/include/ios (revision faef447e) 
1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_IOS
11#define _LIBCPP_IOS
12
13/*
14    ios synopsis
15
16#include <iosfwd>
17
18namespace std
19{
20
21typedef OFF_T streamoff;
22typedef SZ_T streamsize;
23template <class stateT> class fpos;
24
25class ios_base
26{
27public:
28    class failure;
29
30    typedef T1 fmtflags;
31    static constexpr fmtflags boolalpha;
32    static constexpr fmtflags dec;
33    static constexpr fmtflags fixed;
34    static constexpr fmtflags hex;
35    static constexpr fmtflags internal;
36    static constexpr fmtflags left;
37    static constexpr fmtflags oct;
38    static constexpr fmtflags right;
39    static constexpr fmtflags scientific;
40    static constexpr fmtflags showbase;
41    static constexpr fmtflags showpoint;
42    static constexpr fmtflags showpos;
43    static constexpr fmtflags skipws;
44    static constexpr fmtflags unitbuf;
45    static constexpr fmtflags uppercase;
46    static constexpr fmtflags adjustfield;
47    static constexpr fmtflags basefield;
48    static constexpr fmtflags floatfield;
49
50    typedef T2 iostate;
51    static constexpr iostate badbit;
52    static constexpr iostate eofbit;
53    static constexpr iostate failbit;
54    static constexpr iostate goodbit;
55
56    typedef T3 openmode;
57    static constexpr openmode app;
58    static constexpr openmode ate;
59    static constexpr openmode binary;
60    static constexpr openmode in;
61    static constexpr openmode out;
62    static constexpr openmode trunc;
63
64    typedef T4 seekdir;
65    static constexpr seekdir beg;
66    static constexpr seekdir cur;
67    static constexpr seekdir end;
68
69    class Init;
70
71    // 27.5.2.2 fmtflags state:
72    fmtflags flags() const;
73    fmtflags flags(fmtflags fmtfl);
74    fmtflags setf(fmtflags fmtfl);
75    fmtflags setf(fmtflags fmtfl, fmtflags mask);
76    void unsetf(fmtflags mask);
77
78    streamsize precision() const;
79    streamsize precision(streamsize prec);
80    streamsize width() const;
81    streamsize width(streamsize wide);
82
83    // 27.5.2.3 locales:
84    locale imbue(const locale& loc);
85    locale getloc() const;
86
87    // 27.5.2.5 storage:
88    static int xalloc();
89    long& iword(int index);
90    void*& pword(int index);
91
92    // destructor
93    virtual ~ios_base();
94
95    // 27.5.2.6 callbacks;
96    enum event { erase_event, imbue_event, copyfmt_event };
97    typedef void (*event_callback)(event, ios_base&, int index);
98    void register_callback(event_callback fn, int index);
99
100    ios_base(const ios_base&) = delete;
101    ios_base& operator=(const ios_base&) = delete;
102
103    static bool sync_with_stdio(bool sync = true);
104
105protected:
106    ios_base();
107};
108
109template <class charT, class traits = char_traits<charT> >
110class basic_ios
111    : public ios_base
112{
113public:
114    // types:
115    typedef charT char_type;
116    typedef typename traits::int_type int_type;  // removed in C++17
117    typedef typename traits::pos_type pos_type;  // removed in C++17
118    typedef typename traits::off_type off_type;  // removed in C++17
119    typedef traits traits_type;
120
121    operator unspecified-bool-type() const;
122    bool operator!() const;
123    iostate rdstate() const;
124    void clear(iostate state = goodbit);
125    void setstate(iostate state);
126    bool good() const;
127    bool eof() const;
128    bool fail() const;
129    bool bad() const;
130
131    iostate exceptions() const;
132    void exceptions(iostate except);
133
134    // 27.5.4.1 Constructor/destructor:
135    explicit basic_ios(basic_streambuf<charT,traits>* sb);
136    virtual ~basic_ios();
137
138    // 27.5.4.2 Members:
139    basic_ostream<charT,traits>* tie() const;
140    basic_ostream<charT,traits>* tie(basic_ostream<charT,traits>* tiestr);
141
142    basic_streambuf<charT,traits>* rdbuf() const;
143    basic_streambuf<charT,traits>* rdbuf(basic_streambuf<charT,traits>* sb);
144
145    basic_ios& copyfmt(const basic_ios& rhs);
146
147    char_type fill() const;
148    char_type fill(char_type ch);
149
150    locale imbue(const locale& loc);
151
152    char narrow(char_type c, char dfault) const;
153    char_type widen(char c) const;
154
155    basic_ios(const basic_ios& ) = delete;
156    basic_ios& operator=(const basic_ios&) = delete;
157
158protected:
159    basic_ios();
160    void init(basic_streambuf<charT,traits>* sb);
161    void move(basic_ios& rhs);
162    void swap(basic_ios& rhs) noexcept;
163    void set_rdbuf(basic_streambuf<charT, traits>* sb);
164};
165
166// 27.5.5, manipulators:
167ios_base& boolalpha (ios_base& str);
168ios_base& noboolalpha(ios_base& str);
169ios_base& showbase (ios_base& str);
170ios_base& noshowbase (ios_base& str);
171ios_base& showpoint (ios_base& str);
172ios_base& noshowpoint(ios_base& str);
173ios_base& showpos (ios_base& str);
174ios_base& noshowpos (ios_base& str);
175ios_base& skipws (ios_base& str);
176ios_base& noskipws (ios_base& str);
177ios_base& uppercase (ios_base& str);
178ios_base& nouppercase(ios_base& str);
179ios_base& unitbuf (ios_base& str);
180ios_base& nounitbuf (ios_base& str);
181
182// 27.5.5.2 adjustfield:
183ios_base& internal (ios_base& str);
184ios_base& left (ios_base& str);
185ios_base& right (ios_base& str);
186
187// 27.5.5.3 basefield:
188ios_base& dec (ios_base& str);
189ios_base& hex (ios_base& str);
190ios_base& oct (ios_base& str);
191
192// 27.5.5.4 floatfield:
193ios_base& fixed (ios_base& str);
194ios_base& scientific (ios_base& str);
195ios_base& hexfloat (ios_base& str);
196ios_base& defaultfloat(ios_base& str);
197
198// 27.5.5.5 error reporting:
199enum class io_errc
200{
201    stream = 1
202};
203
204concept_map ErrorCodeEnum<io_errc> { };
205error_code make_error_code(io_errc e) noexcept;
206error_condition make_error_condition(io_errc e) noexcept;
207storage-class-specifier const error_category& iostream_category() noexcept;
208
209}  // std
210
211*/
212
213#include <__assert> // all public C++ headers provide the assertion handler
214#include <__config>
215#include <__ios/fpos.h>
216#include <__locale>
217#include <__utility/swap.h>
218#include <iosfwd>
219#include <system_error>
220#include <version>
221
222#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
223#include <atomic>     // for __xindex_
224#endif
225
226#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
227#  pragma GCC system_header
228#endif
229
230_LIBCPP_BEGIN_NAMESPACE_STD
231
232typedef ptrdiff_t streamsize;
233
234class _LIBCPP_TYPE_VIS ios_base
235{
236public:
237    class _LIBCPP_EXCEPTION_ABI failure;
238
239    typedef unsigned int fmtflags;
240    static const fmtflags boolalpha   = 0x0001;
241    static const fmtflags dec         = 0x0002;
242    static const fmtflags fixed       = 0x0004;
243    static const fmtflags hex         = 0x0008;
244    static const fmtflags internal    = 0x0010;
245    static const fmtflags left        = 0x0020;
246    static const fmtflags oct         = 0x0040;
247    static const fmtflags right       = 0x0080;
248    static const fmtflags scientific  = 0x0100;
249    static const fmtflags showbase    = 0x0200;
250    static const fmtflags showpoint   = 0x0400;
251    static const fmtflags showpos     = 0x0800;
252    static const fmtflags skipws      = 0x1000;
253    static const fmtflags unitbuf     = 0x2000;
254    static const fmtflags uppercase   = 0x4000;
255    static const fmtflags adjustfield = left | right | internal;
256    static const fmtflags basefield   = dec | oct | hex;
257    static const fmtflags floatfield  = scientific | fixed;
258
259    typedef unsigned int iostate;
260    static const iostate badbit  = 0x1;
261    static const iostate eofbit  = 0x2;
262    static const iostate failbit = 0x4;
263    static const iostate goodbit = 0x0;
264
265    typedef unsigned int openmode;
266    static const openmode app    = 0x01;
267    static const openmode ate    = 0x02;
268    static const openmode binary = 0x04;
269    static const openmode in     = 0x08;
270    static const openmode out    = 0x10;
271    static const openmode trunc  = 0x20;
272
273    enum seekdir {beg, cur, end};
274
275#if _LIBCPP_STD_VER <= 14
276    typedef iostate      io_state;
277    typedef openmode     open_mode;
278    typedef seekdir      seek_dir;
279
280    typedef _VSTD::streamoff streamoff;
281    typedef _VSTD::streampos streampos;
282#endif
283
284    class _LIBCPP_TYPE_VIS Init;
285
286    // 27.5.2.2 fmtflags state:
287    _LIBCPP_INLINE_VISIBILITY fmtflags flags() const;
288    _LIBCPP_INLINE_VISIBILITY fmtflags flags(fmtflags __fmtfl);
289    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl);
290    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl, fmtflags __mask);
291    _LIBCPP_INLINE_VISIBILITY void unsetf(fmtflags __mask);
292
293    _LIBCPP_INLINE_VISIBILITY streamsize precision() const;
294    _LIBCPP_INLINE_VISIBILITY streamsize precision(streamsize __prec);
295    _LIBCPP_INLINE_VISIBILITY streamsize width() const;
296    _LIBCPP_INLINE_VISIBILITY streamsize width(streamsize __wide);
297
298    // 27.5.2.3 locales:
299    locale imbue(const locale& __loc);
300    locale getloc() const;
301
302    // 27.5.2.5 storage:
303    static int xalloc();
304    long& iword(int __index);
305    void*& pword(int __index);
306
307    // destructor
308    virtual ~ios_base();
309
310    // 27.5.2.6 callbacks;
311    enum event { erase_event, imbue_event, copyfmt_event };
312    typedef void (*event_callback)(event, ios_base&, int __index);
313    void register_callback(event_callback __fn, int __index);
314
315    ios_base(const ios_base&) = delete;
316    ios_base& operator=(const ios_base&) = delete;
317
318    static bool sync_with_stdio(bool __sync = true);
319
320    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const;
321    void clear(iostate __state = goodbit);
322    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state);
323
324    _LIBCPP_INLINE_VISIBILITY bool good() const;
325    _LIBCPP_INLINE_VISIBILITY bool eof() const;
326    _LIBCPP_INLINE_VISIBILITY bool fail() const;
327    _LIBCPP_INLINE_VISIBILITY bool bad() const;
328
329    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const;
330    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate);
331
332    void __set_badbit_and_consider_rethrow();
333    void __set_failbit_and_consider_rethrow();
334
335    _LIBCPP_INLINE_VISIBILITY
336    void __setstate_nothrow(iostate __state)
337    {
338        if (__rdbuf_)
339            __rdstate_ |= __state;
340        else
341            __rdstate_ |= __state | ios_base::badbit;
342    }
343
344protected:
345    _LIBCPP_INLINE_VISIBILITY
346    ios_base() {// purposefully does no initialization
347               }
348
349    void init(void* __sb);
350    _LIBCPP_INLINE_VISIBILITY void* rdbuf() const {return __rdbuf_;}
351
352    _LIBCPP_INLINE_VISIBILITY
353    void rdbuf(void* __sb)
354    {
355        __rdbuf_ = __sb;
356        clear();
357    }
358
359    void __call_callbacks(event);
360    void copyfmt(const ios_base&);
361    void move(ios_base&);
362    void swap(ios_base&) _NOEXCEPT;
363
364    _LIBCPP_INLINE_VISIBILITY
365    void set_rdbuf(void* __sb)
366    {
367        __rdbuf_ = __sb;
368    }
369
370private:
371    // All data members must be scalars
372    fmtflags        __fmtflags_;
373    streamsize      __precision_;
374    streamsize      __width_;
375    iostate         __rdstate_;
376    iostate         __exceptions_;
377    void*           __rdbuf_;
378    void*           __loc_;
379    event_callback* __fn_;
380    int*            __index_;
381    size_t          __event_size_;
382    size_t          __event_cap_;
383// TODO(EricWF): Enable this for both Clang and GCC. Currently it is only
384// enabled with clang.
385#if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
386    static atomic<int> __xindex_;
387#else
388    static int      __xindex_;
389#endif
390    long*           __iarray_;
391    size_t          __iarray_size_;
392    size_t          __iarray_cap_;
393    void**          __parray_;
394    size_t          __parray_size_;
395    size_t          __parray_cap_;
396};
397
398//enum class io_errc
399_LIBCPP_DECLARE_STRONG_ENUM(io_errc)
400{
401    stream = 1
402};
403_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(io_errc)
404
405template <>
406struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc> : public true_type { };
407
408#ifdef _LIBCPP_CXX03_LANG
409template <>
410struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc::__lx> : public true_type { };
411#endif
412
413_LIBCPP_FUNC_VIS
414const error_category& iostream_category() _NOEXCEPT;
415
416inline _LIBCPP_INLINE_VISIBILITY
417error_code
418make_error_code(io_errc __e) _NOEXCEPT
419{
420    return error_code(static_cast<int>(__e), iostream_category());
421}
422
423inline _LIBCPP_INLINE_VISIBILITY
424error_condition
425make_error_condition(io_errc __e) _NOEXCEPT
426{
427    return error_condition(static_cast<int>(__e), iostream_category());
428}
429
430class _LIBCPP_EXCEPTION_ABI ios_base::failure
431    : public system_error
432{
433public:
434    explicit failure(const string& __msg, const error_code& __ec = io_errc::stream);
435    explicit failure(const char* __msg, const error_code& __ec = io_errc::stream);
436    failure(const failure&) _NOEXCEPT = default;
437    virtual ~failure() _NOEXCEPT;
438};
439
440_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
441void __throw_failure(char const* __msg) {
442#ifndef _LIBCPP_NO_EXCEPTIONS
443    throw ios_base::failure(__msg);
444#else
445    ((void)__msg);
446    _VSTD::abort();
447#endif
448}
449
450class _LIBCPP_TYPE_VIS ios_base::Init
451{
452public:
453    Init();
454    ~Init();
455};
456
457// fmtflags
458
459inline _LIBCPP_INLINE_VISIBILITY
460ios_base::fmtflags
461ios_base::flags() const
462{
463    return __fmtflags_;
464}
465
466inline _LIBCPP_INLINE_VISIBILITY
467ios_base::fmtflags
468ios_base::flags(fmtflags __fmtfl)
469{
470    fmtflags __r = __fmtflags_;
471    __fmtflags_ = __fmtfl;
472    return __r;
473}
474
475inline _LIBCPP_INLINE_VISIBILITY
476ios_base::fmtflags
477ios_base::setf(fmtflags __fmtfl)
478{
479    fmtflags __r = __fmtflags_;
480    __fmtflags_ |= __fmtfl;
481    return __r;
482}
483
484inline _LIBCPP_INLINE_VISIBILITY
485void
486ios_base::unsetf(fmtflags __mask)
487{
488    __fmtflags_ &= ~__mask;
489}
490
491inline _LIBCPP_INLINE_VISIBILITY
492ios_base::fmtflags
493ios_base::setf(fmtflags __fmtfl, fmtflags __mask)
494{
495    fmtflags __r = __fmtflags_;
496    unsetf(__mask);
497    __fmtflags_ |= __fmtfl & __mask;
498    return __r;
499}
500
501// precision
502
503inline _LIBCPP_INLINE_VISIBILITY
504streamsize
505ios_base::precision() const
506{
507    return __precision_;
508}
509
510inline _LIBCPP_INLINE_VISIBILITY
511streamsize
512ios_base::precision(streamsize __prec)
513{
514    streamsize __r = __precision_;
515    __precision_ = __prec;
516    return __r;
517}
518
519// width
520
521inline _LIBCPP_INLINE_VISIBILITY
522streamsize
523ios_base::width() const
524{
525    return __width_;
526}
527
528inline _LIBCPP_INLINE_VISIBILITY
529streamsize
530ios_base::width(streamsize __wide)
531{
532    streamsize __r = __width_;
533    __width_ = __wide;
534    return __r;
535}
536
537// iostate
538
539inline _LIBCPP_INLINE_VISIBILITY
540ios_base::iostate
541ios_base::rdstate() const
542{
543    return __rdstate_;
544}
545
546inline _LIBCPP_INLINE_VISIBILITY
547void
548ios_base::setstate(iostate __state)
549{
550    clear(__rdstate_ | __state);
551}
552
553inline _LIBCPP_INLINE_VISIBILITY
554bool
555ios_base::good() const
556{
557    return __rdstate_ == 0;
558}
559
560inline _LIBCPP_INLINE_VISIBILITY
561bool
562ios_base::eof() const
563{
564    return (__rdstate_ & eofbit) != 0;
565}
566
567inline _LIBCPP_INLINE_VISIBILITY
568bool
569ios_base::fail() const
570{
571    return (__rdstate_ & (failbit | badbit)) != 0;
572}
573
574inline _LIBCPP_INLINE_VISIBILITY
575bool
576ios_base::bad() const
577{
578    return (__rdstate_ & badbit) != 0;
579}
580
581inline _LIBCPP_INLINE_VISIBILITY
582ios_base::iostate
583ios_base::exceptions() const
584{
585    return __exceptions_;
586}
587
588inline _LIBCPP_INLINE_VISIBILITY
589void
590ios_base::exceptions(iostate __iostate)
591{
592    __exceptions_ = __iostate;
593    clear(__rdstate_);
594}
595
596template <class _CharT, class _Traits>
597class _LIBCPP_TEMPLATE_VIS basic_ios
598    : public ios_base
599{
600public:
601    // types:
602    typedef _CharT char_type;
603    typedef _Traits traits_type;
604
605    typedef typename traits_type::int_type int_type;
606    typedef typename traits_type::pos_type pos_type;
607    typedef typename traits_type::off_type off_type;
608
609    static_assert((is_same<_CharT, typename traits_type::char_type>::value),
610                  "traits_type::char_type must be the same type as CharT");
611
612#ifdef _LIBCPP_CXX03_LANG
613    // Preserve the ability to compare with literal 0,
614    // and implicitly convert to bool, but not implicitly convert to int.
615    _LIBCPP_INLINE_VISIBILITY
616    operator void*() const {return fail() ? nullptr : (void*)this;}
617#else
618    _LIBCPP_INLINE_VISIBILITY
619    explicit operator bool() const {return !fail();}
620#endif
621
622    _LIBCPP_INLINE_VISIBILITY bool operator!() const    {return  fail();}
623    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const   {return ios_base::rdstate();}
624    _LIBCPP_INLINE_VISIBILITY void clear(iostate __state = goodbit) {ios_base::clear(__state);}
625    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state) {ios_base::setstate(__state);}
626    _LIBCPP_INLINE_VISIBILITY bool good() const {return ios_base::good();}
627    _LIBCPP_INLINE_VISIBILITY bool eof() const  {return ios_base::eof();}
628    _LIBCPP_INLINE_VISIBILITY bool fail() const {return ios_base::fail();}
629    _LIBCPP_INLINE_VISIBILITY bool bad() const  {return ios_base::bad();}
630
631    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const {return ios_base::exceptions();}
632    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
633
634    // 27.5.4.1 Constructor/destructor:
635    _LIBCPP_INLINE_VISIBILITY
636    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
637    virtual ~basic_ios();
638
639    // 27.5.4.2 Members:
640    _LIBCPP_INLINE_VISIBILITY
641    basic_ostream<char_type, traits_type>* tie() const;
642    _LIBCPP_INLINE_VISIBILITY
643    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
644
645    _LIBCPP_INLINE_VISIBILITY
646    basic_streambuf<char_type, traits_type>* rdbuf() const;
647    _LIBCPP_INLINE_VISIBILITY
648    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
649
650    basic_ios& copyfmt(const basic_ios& __rhs);
651
652    _LIBCPP_INLINE_VISIBILITY
653    char_type fill() const;
654    _LIBCPP_INLINE_VISIBILITY
655    char_type fill(char_type __ch);
656
657    _LIBCPP_INLINE_VISIBILITY
658    locale imbue(const locale& __loc);
659
660    _LIBCPP_INLINE_VISIBILITY
661    char narrow(char_type __c, char __dfault) const;
662    _LIBCPP_INLINE_VISIBILITY
663    char_type widen(char __c) const;
664
665protected:
666    _LIBCPP_INLINE_VISIBILITY
667    basic_ios() {// purposefully does no initialization
668                }
669    _LIBCPP_INLINE_VISIBILITY
670    void init(basic_streambuf<char_type, traits_type>* __sb);
671
672    _LIBCPP_INLINE_VISIBILITY
673    void move(basic_ios& __rhs);
674    _LIBCPP_INLINE_VISIBILITY
675    void move(basic_ios&& __rhs) {move(__rhs);}
676    _LIBCPP_INLINE_VISIBILITY
677    void swap(basic_ios& __rhs) _NOEXCEPT;
678    _LIBCPP_INLINE_VISIBILITY
679    void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
680private:
681    basic_ostream<char_type, traits_type>* __tie_;
682    mutable int_type __fill_;
683};
684
685template <class _CharT, class _Traits>
686inline _LIBCPP_INLINE_VISIBILITY
687basic_ios<_CharT, _Traits>::basic_ios(basic_streambuf<char_type,traits_type>* __sb)
688{
689    init(__sb);
690}
691
692template <class _CharT, class _Traits>
693basic_ios<_CharT, _Traits>::~basic_ios()
694{
695}
696
697template <class _CharT, class _Traits>
698inline _LIBCPP_INLINE_VISIBILITY
699void
700basic_ios<_CharT, _Traits>::init(basic_streambuf<char_type, traits_type>* __sb)
701{
702    ios_base::init(__sb);
703    __tie_ = nullptr;
704    __fill_ = traits_type::eof();
705}
706
707template <class _CharT, class _Traits>
708inline _LIBCPP_INLINE_VISIBILITY
709basic_ostream<_CharT, _Traits>*
710basic_ios<_CharT, _Traits>::tie() const
711{
712    return __tie_;
713}
714
715template <class _CharT, class _Traits>
716inline _LIBCPP_INLINE_VISIBILITY
717basic_ostream<_CharT, _Traits>*
718basic_ios<_CharT, _Traits>::tie(basic_ostream<char_type, traits_type>* __tiestr)
719{
720    basic_ostream<char_type, traits_type>* __r = __tie_;
721    __tie_ = __tiestr;
722    return __r;
723}
724
725template <class _CharT, class _Traits>
726inline _LIBCPP_INLINE_VISIBILITY
727basic_streambuf<_CharT, _Traits>*
728basic_ios<_CharT, _Traits>::rdbuf() const
729{
730    return static_cast<basic_streambuf<char_type, traits_type>*>(ios_base::rdbuf());
731}
732
733template <class _CharT, class _Traits>
734inline _LIBCPP_INLINE_VISIBILITY
735basic_streambuf<_CharT, _Traits>*
736basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<char_type, traits_type>* __sb)
737{
738    basic_streambuf<char_type, traits_type>* __r = rdbuf();
739    ios_base::rdbuf(__sb);
740    return __r;
741}
742
743template <class _CharT, class _Traits>
744inline _LIBCPP_INLINE_VISIBILITY
745locale
746basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
747{
748    locale __r = getloc();
749    ios_base::imbue(__loc);
750    if (rdbuf())
751        rdbuf()->pubimbue(__loc);
752    return __r;
753}
754
755template <class _CharT, class _Traits>
756inline _LIBCPP_INLINE_VISIBILITY
757char
758basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
759{
760    return use_facet<ctype<char_type> >(getloc()).narrow(__c, __dfault);
761}
762
763template <class _CharT, class _Traits>
764inline _LIBCPP_INLINE_VISIBILITY
765_CharT
766basic_ios<_CharT, _Traits>::widen(char __c) const
767{
768    return use_facet<ctype<char_type> >(getloc()).widen(__c);
769}
770
771template <class _CharT, class _Traits>
772inline _LIBCPP_INLINE_VISIBILITY
773_CharT
774basic_ios<_CharT, _Traits>::fill() const
775{
776    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
777        __fill_ = widen(' ');
778    return __fill_;
779}
780
781template <class _CharT, class _Traits>
782inline _LIBCPP_INLINE_VISIBILITY
783_CharT
784basic_ios<_CharT, _Traits>::fill(char_type __ch)
785{
786    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
787        __fill_ = widen(' ');
788    char_type __r = __fill_;
789    __fill_ = __ch;
790    return __r;
791}
792
793template <class _CharT, class _Traits>
794basic_ios<_CharT, _Traits>&
795basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
796{
797    if (this != &__rhs)
798    {
799        __call_callbacks(erase_event);
800        ios_base::copyfmt(__rhs);
801        __tie_ = __rhs.__tie_;
802        __fill_ = __rhs.__fill_;
803        __call_callbacks(copyfmt_event);
804        exceptions(__rhs.exceptions());
805    }
806    return *this;
807}
808
809template <class _CharT, class _Traits>
810inline _LIBCPP_INLINE_VISIBILITY
811void
812basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
813{
814    ios_base::move(__rhs);
815    __tie_ = __rhs.__tie_;
816    __rhs.__tie_ = nullptr;
817    __fill_ = __rhs.__fill_;
818}
819
820template <class _CharT, class _Traits>
821inline _LIBCPP_INLINE_VISIBILITY
822void
823basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
824{
825    ios_base::swap(__rhs);
826    _VSTD::swap(__tie_, __rhs.__tie_);
827    _VSTD::swap(__fill_, __rhs.__fill_);
828}
829
830template <class _CharT, class _Traits>
831inline _LIBCPP_INLINE_VISIBILITY
832void
833basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
834{
835    ios_base::set_rdbuf(__sb);
836}
837
838inline
839ios_base&
840boolalpha(ios_base& __str)
841{
842    __str.setf(ios_base::boolalpha);
843    return __str;
844}
845
846inline
847ios_base&
848noboolalpha(ios_base& __str)
849{
850    __str.unsetf(ios_base::boolalpha);
851    return __str;
852}
853
854inline
855ios_base&
856showbase(ios_base& __str)
857{
858    __str.setf(ios_base::showbase);
859    return __str;
860}
861
862inline
863ios_base&
864noshowbase(ios_base& __str)
865{
866    __str.unsetf(ios_base::showbase);
867    return __str;
868}
869
870inline
871ios_base&
872showpoint(ios_base& __str)
873{
874    __str.setf(ios_base::showpoint);
875    return __str;
876}
877
878inline
879ios_base&
880noshowpoint(ios_base& __str)
881{
882    __str.unsetf(ios_base::showpoint);
883    return __str;
884}
885
886inline
887ios_base&
888showpos(ios_base& __str)
889{
890    __str.setf(ios_base::showpos);
891    return __str;
892}
893
894inline
895ios_base&
896noshowpos(ios_base& __str)
897{
898    __str.unsetf(ios_base::showpos);
899    return __str;
900}
901
902inline
903ios_base&
904skipws(ios_base& __str)
905{
906    __str.setf(ios_base::skipws);
907    return __str;
908}
909
910inline
911ios_base&
912noskipws(ios_base& __str)
913{
914    __str.unsetf(ios_base::skipws);
915    return __str;
916}
917
918inline
919ios_base&
920uppercase(ios_base& __str)
921{
922    __str.setf(ios_base::uppercase);
923    return __str;
924}
925
926inline
927ios_base&
928nouppercase(ios_base& __str)
929{
930    __str.unsetf(ios_base::uppercase);
931    return __str;
932}
933
934inline
935ios_base&
936unitbuf(ios_base& __str)
937{
938    __str.setf(ios_base::unitbuf);
939    return __str;
940}
941
942inline
943ios_base&
944nounitbuf(ios_base& __str)
945{
946    __str.unsetf(ios_base::unitbuf);
947    return __str;
948}
949
950inline
951ios_base&
952internal(ios_base& __str)
953{
954    __str.setf(ios_base::internal, ios_base::adjustfield);
955    return __str;
956}
957
958inline
959ios_base&
960left(ios_base& __str)
961{
962    __str.setf(ios_base::left, ios_base::adjustfield);
963    return __str;
964}
965
966inline
967ios_base&
968right(ios_base& __str)
969{
970    __str.setf(ios_base::right, ios_base::adjustfield);
971    return __str;
972}
973
974inline
975ios_base&
976dec(ios_base& __str)
977{
978    __str.setf(ios_base::dec, ios_base::basefield);
979    return __str;
980}
981
982inline
983ios_base&
984hex(ios_base& __str)
985{
986    __str.setf(ios_base::hex, ios_base::basefield);
987    return __str;
988}
989
990inline
991ios_base&
992oct(ios_base& __str)
993{
994    __str.setf(ios_base::oct, ios_base::basefield);
995    return __str;
996}
997
998inline
999ios_base&
1000fixed(ios_base& __str)
1001{
1002    __str.setf(ios_base::fixed, ios_base::floatfield);
1003    return __str;
1004}
1005
1006inline
1007ios_base&
1008scientific(ios_base& __str)
1009{
1010    __str.setf(ios_base::scientific, ios_base::floatfield);
1011    return __str;
1012}
1013
1014inline
1015ios_base&
1016hexfloat(ios_base& __str)
1017{
1018    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
1019    return __str;
1020}
1021
1022inline
1023ios_base&
1024defaultfloat(ios_base& __str)
1025{
1026    __str.unsetf(ios_base::floatfield);
1027    return __str;
1028}
1029
1030_LIBCPP_END_NAMESPACE_STD
1031
1032#endif // _LIBCPP_IOS
1033