xref: /llvm-project-15.0.7/libcxx/include/ios (revision 92bbcfaa) 
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 <__config>
214
215#if defined(_LIBCPP_HAS_NO_LOCALIZATION)
216#   error "The iostreams library is not supported since libc++ has been configured without support for localization."
217#endif
218
219#include <__assert> // all public C++ headers provide the assertion handler
220#include <__ios/fpos.h>
221#include <__locale>
222#include <__utility/swap.h>
223#include <iosfwd>
224#include <system_error>
225#include <version>
226
227#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
228#include <atomic>     // for __xindex_
229#endif
230
231#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
232#  pragma GCC system_header
233#endif
234
235_LIBCPP_BEGIN_NAMESPACE_STD
236
237typedef ptrdiff_t streamsize;
238
239class _LIBCPP_TYPE_VIS ios_base
240{
241public:
242    class _LIBCPP_EXCEPTION_ABI failure;
243
244    typedef unsigned int fmtflags;
245    static const fmtflags boolalpha   = 0x0001;
246    static const fmtflags dec         = 0x0002;
247    static const fmtflags fixed       = 0x0004;
248    static const fmtflags hex         = 0x0008;
249    static const fmtflags internal    = 0x0010;
250    static const fmtflags left        = 0x0020;
251    static const fmtflags oct         = 0x0040;
252    static const fmtflags right       = 0x0080;
253    static const fmtflags scientific  = 0x0100;
254    static const fmtflags showbase    = 0x0200;
255    static const fmtflags showpoint   = 0x0400;
256    static const fmtflags showpos     = 0x0800;
257    static const fmtflags skipws      = 0x1000;
258    static const fmtflags unitbuf     = 0x2000;
259    static const fmtflags uppercase   = 0x4000;
260    static const fmtflags adjustfield = left | right | internal;
261    static const fmtflags basefield   = dec | oct | hex;
262    static const fmtflags floatfield  = scientific | fixed;
263
264    typedef unsigned int iostate;
265    static const iostate badbit  = 0x1;
266    static const iostate eofbit  = 0x2;
267    static const iostate failbit = 0x4;
268    static const iostate goodbit = 0x0;
269
270    typedef unsigned int openmode;
271    static const openmode app    = 0x01;
272    static const openmode ate    = 0x02;
273    static const openmode binary = 0x04;
274    static const openmode in     = 0x08;
275    static const openmode out    = 0x10;
276    static const openmode trunc  = 0x20;
277
278    enum seekdir {beg, cur, end};
279
280#if _LIBCPP_STD_VER <= 14
281    typedef iostate      io_state;
282    typedef openmode     open_mode;
283    typedef seekdir      seek_dir;
284
285    typedef _VSTD::streamoff streamoff;
286    typedef _VSTD::streampos streampos;
287#endif
288
289    class _LIBCPP_TYPE_VIS Init;
290
291    // 27.5.2.2 fmtflags state:
292    _LIBCPP_INLINE_VISIBILITY fmtflags flags() const;
293    _LIBCPP_INLINE_VISIBILITY fmtflags flags(fmtflags __fmtfl);
294    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl);
295    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl, fmtflags __mask);
296    _LIBCPP_INLINE_VISIBILITY void unsetf(fmtflags __mask);
297
298    _LIBCPP_INLINE_VISIBILITY streamsize precision() const;
299    _LIBCPP_INLINE_VISIBILITY streamsize precision(streamsize __prec);
300    _LIBCPP_INLINE_VISIBILITY streamsize width() const;
301    _LIBCPP_INLINE_VISIBILITY streamsize width(streamsize __wide);
302
303    // 27.5.2.3 locales:
304    locale imbue(const locale& __loc);
305    locale getloc() const;
306
307    // 27.5.2.5 storage:
308    static int xalloc();
309    long& iword(int __index);
310    void*& pword(int __index);
311
312    // destructor
313    virtual ~ios_base();
314
315    // 27.5.2.6 callbacks;
316    enum event { erase_event, imbue_event, copyfmt_event };
317    typedef void (*event_callback)(event, ios_base&, int __index);
318    void register_callback(event_callback __fn, int __index);
319
320    ios_base(const ios_base&) = delete;
321    ios_base& operator=(const ios_base&) = delete;
322
323    static bool sync_with_stdio(bool __sync = true);
324
325    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const;
326    void clear(iostate __state = goodbit);
327    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state);
328
329    _LIBCPP_INLINE_VISIBILITY bool good() const;
330    _LIBCPP_INLINE_VISIBILITY bool eof() const;
331    _LIBCPP_INLINE_VISIBILITY bool fail() const;
332    _LIBCPP_INLINE_VISIBILITY bool bad() const;
333
334    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const;
335    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate);
336
337    void __set_badbit_and_consider_rethrow();
338    void __set_failbit_and_consider_rethrow();
339
340    _LIBCPP_INLINE_VISIBILITY
341    void __setstate_nothrow(iostate __state)
342    {
343        if (__rdbuf_)
344            __rdstate_ |= __state;
345        else
346            __rdstate_ |= __state | ios_base::badbit;
347    }
348
349protected:
350    _LIBCPP_INLINE_VISIBILITY
351    ios_base() {// purposefully does no initialization
352               }
353
354    void init(void* __sb);
355    _LIBCPP_INLINE_VISIBILITY void* rdbuf() const {return __rdbuf_;}
356
357    _LIBCPP_INLINE_VISIBILITY
358    void rdbuf(void* __sb)
359    {
360        __rdbuf_ = __sb;
361        clear();
362    }
363
364    void __call_callbacks(event);
365    void copyfmt(const ios_base&);
366    void move(ios_base&);
367    void swap(ios_base&) _NOEXCEPT;
368
369    _LIBCPP_INLINE_VISIBILITY
370    void set_rdbuf(void* __sb)
371    {
372        __rdbuf_ = __sb;
373    }
374
375private:
376    // All data members must be scalars
377    fmtflags        __fmtflags_;
378    streamsize      __precision_;
379    streamsize      __width_;
380    iostate         __rdstate_;
381    iostate         __exceptions_;
382    void*           __rdbuf_;
383    void*           __loc_;
384    event_callback* __fn_;
385    int*            __index_;
386    size_t          __event_size_;
387    size_t          __event_cap_;
388// TODO(EricWF): Enable this for both Clang and GCC. Currently it is only
389// enabled with clang.
390#if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
391    static atomic<int> __xindex_;
392#else
393    static int      __xindex_;
394#endif
395    long*           __iarray_;
396    size_t          __iarray_size_;
397    size_t          __iarray_cap_;
398    void**          __parray_;
399    size_t          __parray_size_;
400    size_t          __parray_cap_;
401};
402
403//enum class io_errc
404_LIBCPP_DECLARE_STRONG_ENUM(io_errc)
405{
406    stream = 1
407};
408_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(io_errc)
409
410template <>
411struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc> : public true_type { };
412
413#ifdef _LIBCPP_CXX03_LANG
414template <>
415struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc::__lx> : public true_type { };
416#endif
417
418_LIBCPP_FUNC_VIS
419const error_category& iostream_category() _NOEXCEPT;
420
421inline _LIBCPP_INLINE_VISIBILITY
422error_code
423make_error_code(io_errc __e) _NOEXCEPT
424{
425    return error_code(static_cast<int>(__e), iostream_category());
426}
427
428inline _LIBCPP_INLINE_VISIBILITY
429error_condition
430make_error_condition(io_errc __e) _NOEXCEPT
431{
432    return error_condition(static_cast<int>(__e), iostream_category());
433}
434
435class _LIBCPP_EXCEPTION_ABI ios_base::failure
436    : public system_error
437{
438public:
439    explicit failure(const string& __msg, const error_code& __ec = io_errc::stream);
440    explicit failure(const char* __msg, const error_code& __ec = io_errc::stream);
441    failure(const failure&) _NOEXCEPT = default;
442    virtual ~failure() _NOEXCEPT;
443};
444
445_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
446void __throw_failure(char const* __msg) {
447#ifndef _LIBCPP_NO_EXCEPTIONS
448    throw ios_base::failure(__msg);
449#else
450    ((void)__msg);
451    _VSTD::abort();
452#endif
453}
454
455class _LIBCPP_TYPE_VIS ios_base::Init
456{
457public:
458    Init();
459    ~Init();
460};
461
462// fmtflags
463
464inline _LIBCPP_INLINE_VISIBILITY
465ios_base::fmtflags
466ios_base::flags() const
467{
468    return __fmtflags_;
469}
470
471inline _LIBCPP_INLINE_VISIBILITY
472ios_base::fmtflags
473ios_base::flags(fmtflags __fmtfl)
474{
475    fmtflags __r = __fmtflags_;
476    __fmtflags_ = __fmtfl;
477    return __r;
478}
479
480inline _LIBCPP_INLINE_VISIBILITY
481ios_base::fmtflags
482ios_base::setf(fmtflags __fmtfl)
483{
484    fmtflags __r = __fmtflags_;
485    __fmtflags_ |= __fmtfl;
486    return __r;
487}
488
489inline _LIBCPP_INLINE_VISIBILITY
490void
491ios_base::unsetf(fmtflags __mask)
492{
493    __fmtflags_ &= ~__mask;
494}
495
496inline _LIBCPP_INLINE_VISIBILITY
497ios_base::fmtflags
498ios_base::setf(fmtflags __fmtfl, fmtflags __mask)
499{
500    fmtflags __r = __fmtflags_;
501    unsetf(__mask);
502    __fmtflags_ |= __fmtfl & __mask;
503    return __r;
504}
505
506// precision
507
508inline _LIBCPP_INLINE_VISIBILITY
509streamsize
510ios_base::precision() const
511{
512    return __precision_;
513}
514
515inline _LIBCPP_INLINE_VISIBILITY
516streamsize
517ios_base::precision(streamsize __prec)
518{
519    streamsize __r = __precision_;
520    __precision_ = __prec;
521    return __r;
522}
523
524// width
525
526inline _LIBCPP_INLINE_VISIBILITY
527streamsize
528ios_base::width() const
529{
530    return __width_;
531}
532
533inline _LIBCPP_INLINE_VISIBILITY
534streamsize
535ios_base::width(streamsize __wide)
536{
537    streamsize __r = __width_;
538    __width_ = __wide;
539    return __r;
540}
541
542// iostate
543
544inline _LIBCPP_INLINE_VISIBILITY
545ios_base::iostate
546ios_base::rdstate() const
547{
548    return __rdstate_;
549}
550
551inline _LIBCPP_INLINE_VISIBILITY
552void
553ios_base::setstate(iostate __state)
554{
555    clear(__rdstate_ | __state);
556}
557
558inline _LIBCPP_INLINE_VISIBILITY
559bool
560ios_base::good() const
561{
562    return __rdstate_ == 0;
563}
564
565inline _LIBCPP_INLINE_VISIBILITY
566bool
567ios_base::eof() const
568{
569    return (__rdstate_ & eofbit) != 0;
570}
571
572inline _LIBCPP_INLINE_VISIBILITY
573bool
574ios_base::fail() const
575{
576    return (__rdstate_ & (failbit | badbit)) != 0;
577}
578
579inline _LIBCPP_INLINE_VISIBILITY
580bool
581ios_base::bad() const
582{
583    return (__rdstate_ & badbit) != 0;
584}
585
586inline _LIBCPP_INLINE_VISIBILITY
587ios_base::iostate
588ios_base::exceptions() const
589{
590    return __exceptions_;
591}
592
593inline _LIBCPP_INLINE_VISIBILITY
594void
595ios_base::exceptions(iostate __iostate)
596{
597    __exceptions_ = __iostate;
598    clear(__rdstate_);
599}
600
601template <class _CharT, class _Traits>
602class _LIBCPP_TEMPLATE_VIS basic_ios
603    : public ios_base
604{
605public:
606    // types:
607    typedef _CharT char_type;
608    typedef _Traits traits_type;
609
610    typedef typename traits_type::int_type int_type;
611    typedef typename traits_type::pos_type pos_type;
612    typedef typename traits_type::off_type off_type;
613
614    static_assert((is_same<_CharT, typename traits_type::char_type>::value),
615                  "traits_type::char_type must be the same type as CharT");
616
617#ifdef _LIBCPP_CXX03_LANG
618    // Preserve the ability to compare with literal 0,
619    // and implicitly convert to bool, but not implicitly convert to int.
620    _LIBCPP_INLINE_VISIBILITY
621    operator void*() const {return fail() ? nullptr : (void*)this;}
622#else
623    _LIBCPP_INLINE_VISIBILITY
624    explicit operator bool() const {return !fail();}
625#endif
626
627    _LIBCPP_INLINE_VISIBILITY bool operator!() const    {return  fail();}
628    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const   {return ios_base::rdstate();}
629    _LIBCPP_INLINE_VISIBILITY void clear(iostate __state = goodbit) {ios_base::clear(__state);}
630    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state) {ios_base::setstate(__state);}
631    _LIBCPP_INLINE_VISIBILITY bool good() const {return ios_base::good();}
632    _LIBCPP_INLINE_VISIBILITY bool eof() const  {return ios_base::eof();}
633    _LIBCPP_INLINE_VISIBILITY bool fail() const {return ios_base::fail();}
634    _LIBCPP_INLINE_VISIBILITY bool bad() const  {return ios_base::bad();}
635
636    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const {return ios_base::exceptions();}
637    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
638
639    // 27.5.4.1 Constructor/destructor:
640    _LIBCPP_INLINE_VISIBILITY
641    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
642    virtual ~basic_ios();
643
644    // 27.5.4.2 Members:
645    _LIBCPP_INLINE_VISIBILITY
646    basic_ostream<char_type, traits_type>* tie() const;
647    _LIBCPP_INLINE_VISIBILITY
648    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
649
650    _LIBCPP_INLINE_VISIBILITY
651    basic_streambuf<char_type, traits_type>* rdbuf() const;
652    _LIBCPP_INLINE_VISIBILITY
653    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
654
655    basic_ios& copyfmt(const basic_ios& __rhs);
656
657    _LIBCPP_INLINE_VISIBILITY
658    char_type fill() const;
659    _LIBCPP_INLINE_VISIBILITY
660    char_type fill(char_type __ch);
661
662    _LIBCPP_INLINE_VISIBILITY
663    locale imbue(const locale& __loc);
664
665    _LIBCPP_INLINE_VISIBILITY
666    char narrow(char_type __c, char __dfault) const;
667    _LIBCPP_INLINE_VISIBILITY
668    char_type widen(char __c) const;
669
670protected:
671    _LIBCPP_INLINE_VISIBILITY
672    basic_ios() {// purposefully does no initialization
673                }
674    _LIBCPP_INLINE_VISIBILITY
675    void init(basic_streambuf<char_type, traits_type>* __sb);
676
677    _LIBCPP_INLINE_VISIBILITY
678    void move(basic_ios& __rhs);
679    _LIBCPP_INLINE_VISIBILITY
680    void move(basic_ios&& __rhs) {move(__rhs);}
681    _LIBCPP_INLINE_VISIBILITY
682    void swap(basic_ios& __rhs) _NOEXCEPT;
683    _LIBCPP_INLINE_VISIBILITY
684    void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
685private:
686    basic_ostream<char_type, traits_type>* __tie_;
687    mutable int_type __fill_;
688};
689
690template <class _CharT, class _Traits>
691inline _LIBCPP_INLINE_VISIBILITY
692basic_ios<_CharT, _Traits>::basic_ios(basic_streambuf<char_type,traits_type>* __sb)
693{
694    init(__sb);
695}
696
697template <class _CharT, class _Traits>
698basic_ios<_CharT, _Traits>::~basic_ios()
699{
700}
701
702template <class _CharT, class _Traits>
703inline _LIBCPP_INLINE_VISIBILITY
704void
705basic_ios<_CharT, _Traits>::init(basic_streambuf<char_type, traits_type>* __sb)
706{
707    ios_base::init(__sb);
708    __tie_ = nullptr;
709    __fill_ = traits_type::eof();
710}
711
712template <class _CharT, class _Traits>
713inline _LIBCPP_INLINE_VISIBILITY
714basic_ostream<_CharT, _Traits>*
715basic_ios<_CharT, _Traits>::tie() const
716{
717    return __tie_;
718}
719
720template <class _CharT, class _Traits>
721inline _LIBCPP_INLINE_VISIBILITY
722basic_ostream<_CharT, _Traits>*
723basic_ios<_CharT, _Traits>::tie(basic_ostream<char_type, traits_type>* __tiestr)
724{
725    basic_ostream<char_type, traits_type>* __r = __tie_;
726    __tie_ = __tiestr;
727    return __r;
728}
729
730template <class _CharT, class _Traits>
731inline _LIBCPP_INLINE_VISIBILITY
732basic_streambuf<_CharT, _Traits>*
733basic_ios<_CharT, _Traits>::rdbuf() const
734{
735    return static_cast<basic_streambuf<char_type, traits_type>*>(ios_base::rdbuf());
736}
737
738template <class _CharT, class _Traits>
739inline _LIBCPP_INLINE_VISIBILITY
740basic_streambuf<_CharT, _Traits>*
741basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<char_type, traits_type>* __sb)
742{
743    basic_streambuf<char_type, traits_type>* __r = rdbuf();
744    ios_base::rdbuf(__sb);
745    return __r;
746}
747
748template <class _CharT, class _Traits>
749inline _LIBCPP_INLINE_VISIBILITY
750locale
751basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
752{
753    locale __r = getloc();
754    ios_base::imbue(__loc);
755    if (rdbuf())
756        rdbuf()->pubimbue(__loc);
757    return __r;
758}
759
760template <class _CharT, class _Traits>
761inline _LIBCPP_INLINE_VISIBILITY
762char
763basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
764{
765    return use_facet<ctype<char_type> >(getloc()).narrow(__c, __dfault);
766}
767
768template <class _CharT, class _Traits>
769inline _LIBCPP_INLINE_VISIBILITY
770_CharT
771basic_ios<_CharT, _Traits>::widen(char __c) const
772{
773    return use_facet<ctype<char_type> >(getloc()).widen(__c);
774}
775
776template <class _CharT, class _Traits>
777inline _LIBCPP_INLINE_VISIBILITY
778_CharT
779basic_ios<_CharT, _Traits>::fill() const
780{
781    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
782        __fill_ = widen(' ');
783    return __fill_;
784}
785
786template <class _CharT, class _Traits>
787inline _LIBCPP_INLINE_VISIBILITY
788_CharT
789basic_ios<_CharT, _Traits>::fill(char_type __ch)
790{
791    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
792        __fill_ = widen(' ');
793    char_type __r = __fill_;
794    __fill_ = __ch;
795    return __r;
796}
797
798template <class _CharT, class _Traits>
799basic_ios<_CharT, _Traits>&
800basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
801{
802    if (this != &__rhs)
803    {
804        __call_callbacks(erase_event);
805        ios_base::copyfmt(__rhs);
806        __tie_ = __rhs.__tie_;
807        __fill_ = __rhs.__fill_;
808        __call_callbacks(copyfmt_event);
809        exceptions(__rhs.exceptions());
810    }
811    return *this;
812}
813
814template <class _CharT, class _Traits>
815inline _LIBCPP_INLINE_VISIBILITY
816void
817basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
818{
819    ios_base::move(__rhs);
820    __tie_ = __rhs.__tie_;
821    __rhs.__tie_ = nullptr;
822    __fill_ = __rhs.__fill_;
823}
824
825template <class _CharT, class _Traits>
826inline _LIBCPP_INLINE_VISIBILITY
827void
828basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
829{
830    ios_base::swap(__rhs);
831    _VSTD::swap(__tie_, __rhs.__tie_);
832    _VSTD::swap(__fill_, __rhs.__fill_);
833}
834
835template <class _CharT, class _Traits>
836inline _LIBCPP_INLINE_VISIBILITY
837void
838basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
839{
840    ios_base::set_rdbuf(__sb);
841}
842
843inline
844ios_base&
845boolalpha(ios_base& __str)
846{
847    __str.setf(ios_base::boolalpha);
848    return __str;
849}
850
851inline
852ios_base&
853noboolalpha(ios_base& __str)
854{
855    __str.unsetf(ios_base::boolalpha);
856    return __str;
857}
858
859inline
860ios_base&
861showbase(ios_base& __str)
862{
863    __str.setf(ios_base::showbase);
864    return __str;
865}
866
867inline
868ios_base&
869noshowbase(ios_base& __str)
870{
871    __str.unsetf(ios_base::showbase);
872    return __str;
873}
874
875inline
876ios_base&
877showpoint(ios_base& __str)
878{
879    __str.setf(ios_base::showpoint);
880    return __str;
881}
882
883inline
884ios_base&
885noshowpoint(ios_base& __str)
886{
887    __str.unsetf(ios_base::showpoint);
888    return __str;
889}
890
891inline
892ios_base&
893showpos(ios_base& __str)
894{
895    __str.setf(ios_base::showpos);
896    return __str;
897}
898
899inline
900ios_base&
901noshowpos(ios_base& __str)
902{
903    __str.unsetf(ios_base::showpos);
904    return __str;
905}
906
907inline
908ios_base&
909skipws(ios_base& __str)
910{
911    __str.setf(ios_base::skipws);
912    return __str;
913}
914
915inline
916ios_base&
917noskipws(ios_base& __str)
918{
919    __str.unsetf(ios_base::skipws);
920    return __str;
921}
922
923inline
924ios_base&
925uppercase(ios_base& __str)
926{
927    __str.setf(ios_base::uppercase);
928    return __str;
929}
930
931inline
932ios_base&
933nouppercase(ios_base& __str)
934{
935    __str.unsetf(ios_base::uppercase);
936    return __str;
937}
938
939inline
940ios_base&
941unitbuf(ios_base& __str)
942{
943    __str.setf(ios_base::unitbuf);
944    return __str;
945}
946
947inline
948ios_base&
949nounitbuf(ios_base& __str)
950{
951    __str.unsetf(ios_base::unitbuf);
952    return __str;
953}
954
955inline
956ios_base&
957internal(ios_base& __str)
958{
959    __str.setf(ios_base::internal, ios_base::adjustfield);
960    return __str;
961}
962
963inline
964ios_base&
965left(ios_base& __str)
966{
967    __str.setf(ios_base::left, ios_base::adjustfield);
968    return __str;
969}
970
971inline
972ios_base&
973right(ios_base& __str)
974{
975    __str.setf(ios_base::right, ios_base::adjustfield);
976    return __str;
977}
978
979inline
980ios_base&
981dec(ios_base& __str)
982{
983    __str.setf(ios_base::dec, ios_base::basefield);
984    return __str;
985}
986
987inline
988ios_base&
989hex(ios_base& __str)
990{
991    __str.setf(ios_base::hex, ios_base::basefield);
992    return __str;
993}
994
995inline
996ios_base&
997oct(ios_base& __str)
998{
999    __str.setf(ios_base::oct, ios_base::basefield);
1000    return __str;
1001}
1002
1003inline
1004ios_base&
1005fixed(ios_base& __str)
1006{
1007    __str.setf(ios_base::fixed, ios_base::floatfield);
1008    return __str;
1009}
1010
1011inline
1012ios_base&
1013scientific(ios_base& __str)
1014{
1015    __str.setf(ios_base::scientific, ios_base::floatfield);
1016    return __str;
1017}
1018
1019inline
1020ios_base&
1021hexfloat(ios_base& __str)
1022{
1023    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
1024    return __str;
1025}
1026
1027inline
1028ios_base&
1029defaultfloat(ios_base& __str)
1030{
1031    __str.unsetf(ios_base::floatfield);
1032    return __str;
1033}
1034
1035_LIBCPP_END_NAMESPACE_STD
1036
1037#endif // _LIBCPP_IOS
1038