xref: /freebsd/contrib/llvm-project/libcxx/include/ios (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229) 
1// -*- C++ -*-
2//===---------------------------- ios -------------------------------------===//
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#include <iosfwd>
215#include <__locale>
216#include <system_error>
217
218#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
219#include <atomic>     // for __xindex_
220#endif
221
222#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
223#pragma GCC system_header
224#endif
225
226_LIBCPP_BEGIN_NAMESPACE_STD
227
228typedef ptrdiff_t streamsize;
229
230class _LIBCPP_TYPE_VIS ios_base
231{
232public:
233    class _LIBCPP_EXCEPTION_ABI failure;
234
235    typedef unsigned int fmtflags;
236    static const fmtflags boolalpha   = 0x0001;
237    static const fmtflags dec         = 0x0002;
238    static const fmtflags fixed       = 0x0004;
239    static const fmtflags hex         = 0x0008;
240    static const fmtflags internal    = 0x0010;
241    static const fmtflags left        = 0x0020;
242    static const fmtflags oct         = 0x0040;
243    static const fmtflags right       = 0x0080;
244    static const fmtflags scientific  = 0x0100;
245    static const fmtflags showbase    = 0x0200;
246    static const fmtflags showpoint   = 0x0400;
247    static const fmtflags showpos     = 0x0800;
248    static const fmtflags skipws      = 0x1000;
249    static const fmtflags unitbuf     = 0x2000;
250    static const fmtflags uppercase   = 0x4000;
251    static const fmtflags adjustfield = left | right | internal;
252    static const fmtflags basefield   = dec | oct | hex;
253    static const fmtflags floatfield  = scientific | fixed;
254
255    typedef unsigned int iostate;
256    static const iostate badbit  = 0x1;
257    static const iostate eofbit  = 0x2;
258    static const iostate failbit = 0x4;
259    static const iostate goodbit = 0x0;
260
261    typedef unsigned int openmode;
262    static const openmode app    = 0x01;
263    static const openmode ate    = 0x02;
264    static const openmode binary = 0x04;
265    static const openmode in     = 0x08;
266    static const openmode out    = 0x10;
267    static const openmode trunc  = 0x20;
268
269    enum seekdir {beg, cur, end};
270
271#if _LIBCPP_STD_VER <= 14
272    typedef iostate      io_state;
273    typedef openmode     open_mode;
274    typedef seekdir      seek_dir;
275
276    typedef _VSTD::streamoff streamoff;
277    typedef _VSTD::streampos streampos;
278#endif
279
280    class _LIBCPP_TYPE_VIS Init;
281
282    // 27.5.2.2 fmtflags state:
283    _LIBCPP_INLINE_VISIBILITY fmtflags flags() const;
284    _LIBCPP_INLINE_VISIBILITY fmtflags flags(fmtflags __fmtfl);
285    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl);
286    _LIBCPP_INLINE_VISIBILITY fmtflags setf(fmtflags __fmtfl, fmtflags __mask);
287    _LIBCPP_INLINE_VISIBILITY void unsetf(fmtflags __mask);
288
289    _LIBCPP_INLINE_VISIBILITY streamsize precision() const;
290    _LIBCPP_INLINE_VISIBILITY streamsize precision(streamsize __prec);
291    _LIBCPP_INLINE_VISIBILITY streamsize width() const;
292    _LIBCPP_INLINE_VISIBILITY streamsize width(streamsize __wide);
293
294    // 27.5.2.3 locales:
295    locale imbue(const locale& __loc);
296    locale getloc() const;
297
298    // 27.5.2.5 storage:
299    static int xalloc();
300    long& iword(int __index);
301    void*& pword(int __index);
302
303    // destructor
304    virtual ~ios_base();
305
306    // 27.5.2.6 callbacks;
307    enum event { erase_event, imbue_event, copyfmt_event };
308    typedef void (*event_callback)(event, ios_base&, int __index);
309    void register_callback(event_callback __fn, int __index);
310
311private:
312    ios_base(const ios_base&); // = delete;
313    ios_base& operator=(const ios_base&); // = delete;
314
315public:
316    static bool sync_with_stdio(bool __sync = true);
317
318    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const;
319    void clear(iostate __state = goodbit);
320    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state);
321
322    _LIBCPP_INLINE_VISIBILITY bool good() const;
323    _LIBCPP_INLINE_VISIBILITY bool eof() const;
324    _LIBCPP_INLINE_VISIBILITY bool fail() const;
325    _LIBCPP_INLINE_VISIBILITY bool bad() const;
326
327    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const;
328    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate);
329
330    void __set_badbit_and_consider_rethrow();
331    void __set_failbit_and_consider_rethrow();
332
333    _LIBCPP_INLINE_VISIBILITY
334    void __setstate_nothrow(iostate __state)
335    {
336        if (__rdbuf_)
337            __rdstate_ |= __state;
338        else
339            __rdstate_ |= __state | ios_base::badbit;
340    }
341
342protected:
343    _LIBCPP_INLINE_VISIBILITY
344    ios_base() {// purposefully does no initialization
345               }
346
347    void init(void* __sb);
348    _LIBCPP_INLINE_VISIBILITY void* rdbuf() const {return __rdbuf_;}
349
350    _LIBCPP_INLINE_VISIBILITY
351    void rdbuf(void* __sb)
352    {
353        __rdbuf_ = __sb;
354        clear();
355    }
356
357    void __call_callbacks(event);
358    void copyfmt(const ios_base&);
359    void move(ios_base&);
360    void swap(ios_base&) _NOEXCEPT;
361
362    _LIBCPP_INLINE_VISIBILITY
363    void set_rdbuf(void* __sb)
364    {
365        __rdbuf_ = __sb;
366    }
367
368private:
369    // All data members must be scalars
370    fmtflags        __fmtflags_;
371    streamsize      __precision_;
372    streamsize      __width_;
373    iostate         __rdstate_;
374    iostate         __exceptions_;
375    void*           __rdbuf_;
376    void*           __loc_;
377    event_callback* __fn_;
378    int*            __index_;
379    size_t          __event_size_;
380    size_t          __event_cap_;
381// TODO(EricWF): Enable this for both Clang and GCC. Currently it is only
382// enabled with clang.
383#if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
384    static atomic<int> __xindex_;
385#else
386    static int      __xindex_;
387#endif
388    long*           __iarray_;
389    size_t          __iarray_size_;
390    size_t          __iarray_cap_;
391    void**          __parray_;
392    size_t          __parray_size_;
393    size_t          __parray_cap_;
394};
395
396//enum class io_errc
397_LIBCPP_DECLARE_STRONG_ENUM(io_errc)
398{
399    stream = 1
400};
401_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(io_errc)
402
403template <>
404struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc> : public true_type { };
405
406#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
407template <>
408struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc::__lx> : public true_type { };
409#endif
410
411_LIBCPP_FUNC_VIS
412const error_category& iostream_category() _NOEXCEPT;
413
414inline _LIBCPP_INLINE_VISIBILITY
415error_code
416make_error_code(io_errc __e) _NOEXCEPT
417{
418    return error_code(static_cast<int>(__e), iostream_category());
419}
420
421inline _LIBCPP_INLINE_VISIBILITY
422error_condition
423make_error_condition(io_errc __e) _NOEXCEPT
424{
425    return error_condition(static_cast<int>(__e), iostream_category());
426}
427
428class _LIBCPP_EXCEPTION_ABI ios_base::failure
429    : public system_error
430{
431public:
432    explicit failure(const string& __msg, const error_code& __ec = io_errc::stream);
433    explicit failure(const char* __msg, const error_code& __ec = io_errc::stream);
434    failure(const failure&) _NOEXCEPT = default;
435    virtual ~failure() _NOEXCEPT;
436};
437
438_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
439void __throw_failure(char const* __msg) {
440#ifndef _LIBCPP_NO_EXCEPTIONS
441    throw ios_base::failure(__msg);
442#else
443    ((void)__msg);
444    _VSTD::abort();
445#endif
446}
447
448class _LIBCPP_TYPE_VIS ios_base::Init
449{
450public:
451    Init();
452    ~Init();
453};
454
455// fmtflags
456
457inline _LIBCPP_INLINE_VISIBILITY
458ios_base::fmtflags
459ios_base::flags() const
460{
461    return __fmtflags_;
462}
463
464inline _LIBCPP_INLINE_VISIBILITY
465ios_base::fmtflags
466ios_base::flags(fmtflags __fmtfl)
467{
468    fmtflags __r = __fmtflags_;
469    __fmtflags_ = __fmtfl;
470    return __r;
471}
472
473inline _LIBCPP_INLINE_VISIBILITY
474ios_base::fmtflags
475ios_base::setf(fmtflags __fmtfl)
476{
477    fmtflags __r = __fmtflags_;
478    __fmtflags_ |= __fmtfl;
479    return __r;
480}
481
482inline _LIBCPP_INLINE_VISIBILITY
483void
484ios_base::unsetf(fmtflags __mask)
485{
486    __fmtflags_ &= ~__mask;
487}
488
489inline _LIBCPP_INLINE_VISIBILITY
490ios_base::fmtflags
491ios_base::setf(fmtflags __fmtfl, fmtflags __mask)
492{
493    fmtflags __r = __fmtflags_;
494    unsetf(__mask);
495    __fmtflags_ |= __fmtfl & __mask;
496    return __r;
497}
498
499// precision
500
501inline _LIBCPP_INLINE_VISIBILITY
502streamsize
503ios_base::precision() const
504{
505    return __precision_;
506}
507
508inline _LIBCPP_INLINE_VISIBILITY
509streamsize
510ios_base::precision(streamsize __prec)
511{
512    streamsize __r = __precision_;
513    __precision_ = __prec;
514    return __r;
515}
516
517// width
518
519inline _LIBCPP_INLINE_VISIBILITY
520streamsize
521ios_base::width() const
522{
523    return __width_;
524}
525
526inline _LIBCPP_INLINE_VISIBILITY
527streamsize
528ios_base::width(streamsize __wide)
529{
530    streamsize __r = __width_;
531    __width_ = __wide;
532    return __r;
533}
534
535// iostate
536
537inline _LIBCPP_INLINE_VISIBILITY
538ios_base::iostate
539ios_base::rdstate() const
540{
541    return __rdstate_;
542}
543
544inline _LIBCPP_INLINE_VISIBILITY
545void
546ios_base::setstate(iostate __state)
547{
548    clear(__rdstate_ | __state);
549}
550
551inline _LIBCPP_INLINE_VISIBILITY
552bool
553ios_base::good() const
554{
555    return __rdstate_ == 0;
556}
557
558inline _LIBCPP_INLINE_VISIBILITY
559bool
560ios_base::eof() const
561{
562    return (__rdstate_ & eofbit) != 0;
563}
564
565inline _LIBCPP_INLINE_VISIBILITY
566bool
567ios_base::fail() const
568{
569    return (__rdstate_ & (failbit | badbit)) != 0;
570}
571
572inline _LIBCPP_INLINE_VISIBILITY
573bool
574ios_base::bad() const
575{
576    return (__rdstate_ & badbit) != 0;
577}
578
579inline _LIBCPP_INLINE_VISIBILITY
580ios_base::iostate
581ios_base::exceptions() const
582{
583    return __exceptions_;
584}
585
586inline _LIBCPP_INLINE_VISIBILITY
587void
588ios_base::exceptions(iostate __iostate)
589{
590    __exceptions_ = __iostate;
591    clear(__rdstate_);
592}
593
594#if defined(_LIBCPP_CXX03_LANG)
595struct _LIBCPP_TYPE_VIS __cxx03_bool {
596  typedef void (__cxx03_bool::*__bool_type)();
597  void __true_value() {}
598};
599#endif
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  // __true_value will generate undefined references when linking unless
618  // we give it internal linkage.
619
620#if defined(_LIBCPP_CXX03_LANG)
621    _LIBCPP_INLINE_VISIBILITY
622    operator __cxx03_bool::__bool_type() const {
623        return !fail() ? &__cxx03_bool::__true_value : nullptr;
624    }
625#else
626    _LIBCPP_INLINE_VISIBILITY
627    _LIBCPP_EXPLICIT operator bool() const {return !fail();}
628#endif
629
630    _LIBCPP_INLINE_VISIBILITY bool operator!() const    {return  fail();}
631    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const   {return ios_base::rdstate();}
632    _LIBCPP_INLINE_VISIBILITY void clear(iostate __state = goodbit) {ios_base::clear(__state);}
633    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state) {ios_base::setstate(__state);}
634    _LIBCPP_INLINE_VISIBILITY bool good() const {return ios_base::good();}
635    _LIBCPP_INLINE_VISIBILITY bool eof() const  {return ios_base::eof();}
636    _LIBCPP_INLINE_VISIBILITY bool fail() const {return ios_base::fail();}
637    _LIBCPP_INLINE_VISIBILITY bool bad() const  {return ios_base::bad();}
638
639    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const {return ios_base::exceptions();}
640    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
641
642    // 27.5.4.1 Constructor/destructor:
643    _LIBCPP_INLINE_VISIBILITY
644    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
645    virtual ~basic_ios();
646
647    // 27.5.4.2 Members:
648    _LIBCPP_INLINE_VISIBILITY
649    basic_ostream<char_type, traits_type>* tie() const;
650    _LIBCPP_INLINE_VISIBILITY
651    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
652
653    _LIBCPP_INLINE_VISIBILITY
654    basic_streambuf<char_type, traits_type>* rdbuf() const;
655    _LIBCPP_INLINE_VISIBILITY
656    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
657
658    basic_ios& copyfmt(const basic_ios& __rhs);
659
660    _LIBCPP_INLINE_VISIBILITY
661    char_type fill() const;
662    _LIBCPP_INLINE_VISIBILITY
663    char_type fill(char_type __ch);
664
665    _LIBCPP_INLINE_VISIBILITY
666    locale imbue(const locale& __loc);
667
668    _LIBCPP_INLINE_VISIBILITY
669    char narrow(char_type __c, char __dfault) const;
670    _LIBCPP_INLINE_VISIBILITY
671    char_type widen(char __c) const;
672
673protected:
674    _LIBCPP_INLINE_VISIBILITY
675    basic_ios() {// purposefully does no initialization
676                }
677    _LIBCPP_INLINE_VISIBILITY
678    void init(basic_streambuf<char_type, traits_type>* __sb);
679
680    _LIBCPP_INLINE_VISIBILITY
681    void move(basic_ios& __rhs);
682#ifndef _LIBCPP_CXX03_LANG
683    _LIBCPP_INLINE_VISIBILITY
684    void move(basic_ios&& __rhs) {move(__rhs);}
685#endif
686    _LIBCPP_INLINE_VISIBILITY
687    void swap(basic_ios& __rhs) _NOEXCEPT;
688    _LIBCPP_INLINE_VISIBILITY
689    void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
690private:
691    basic_ostream<char_type, traits_type>* __tie_;
692    mutable int_type __fill_;
693};
694
695template <class _CharT, class _Traits>
696inline _LIBCPP_INLINE_VISIBILITY
697basic_ios<_CharT, _Traits>::basic_ios(basic_streambuf<char_type,traits_type>* __sb)
698{
699    init(__sb);
700}
701
702template <class _CharT, class _Traits>
703basic_ios<_CharT, _Traits>::~basic_ios()
704{
705}
706
707template <class _CharT, class _Traits>
708inline _LIBCPP_INLINE_VISIBILITY
709void
710basic_ios<_CharT, _Traits>::init(basic_streambuf<char_type, traits_type>* __sb)
711{
712    ios_base::init(__sb);
713    __tie_ = 0;
714    __fill_ = traits_type::eof();
715}
716
717template <class _CharT, class _Traits>
718inline _LIBCPP_INLINE_VISIBILITY
719basic_ostream<_CharT, _Traits>*
720basic_ios<_CharT, _Traits>::tie() const
721{
722    return __tie_;
723}
724
725template <class _CharT, class _Traits>
726inline _LIBCPP_INLINE_VISIBILITY
727basic_ostream<_CharT, _Traits>*
728basic_ios<_CharT, _Traits>::tie(basic_ostream<char_type, traits_type>* __tiestr)
729{
730    basic_ostream<char_type, traits_type>* __r = __tie_;
731    __tie_ = __tiestr;
732    return __r;
733}
734
735template <class _CharT, class _Traits>
736inline _LIBCPP_INLINE_VISIBILITY
737basic_streambuf<_CharT, _Traits>*
738basic_ios<_CharT, _Traits>::rdbuf() const
739{
740    return static_cast<basic_streambuf<char_type, traits_type>*>(ios_base::rdbuf());
741}
742
743template <class _CharT, class _Traits>
744inline _LIBCPP_INLINE_VISIBILITY
745basic_streambuf<_CharT, _Traits>*
746basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<char_type, traits_type>* __sb)
747{
748    basic_streambuf<char_type, traits_type>* __r = rdbuf();
749    ios_base::rdbuf(__sb);
750    return __r;
751}
752
753template <class _CharT, class _Traits>
754inline _LIBCPP_INLINE_VISIBILITY
755locale
756basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
757{
758    locale __r = getloc();
759    ios_base::imbue(__loc);
760    if (rdbuf())
761        rdbuf()->pubimbue(__loc);
762    return __r;
763}
764
765template <class _CharT, class _Traits>
766inline _LIBCPP_INLINE_VISIBILITY
767char
768basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
769{
770    return use_facet<ctype<char_type> >(getloc()).narrow(__c, __dfault);
771}
772
773template <class _CharT, class _Traits>
774inline _LIBCPP_INLINE_VISIBILITY
775_CharT
776basic_ios<_CharT, _Traits>::widen(char __c) const
777{
778    return use_facet<ctype<char_type> >(getloc()).widen(__c);
779}
780
781template <class _CharT, class _Traits>
782inline _LIBCPP_INLINE_VISIBILITY
783_CharT
784basic_ios<_CharT, _Traits>::fill() const
785{
786    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
787        __fill_ = widen(' ');
788    return __fill_;
789}
790
791template <class _CharT, class _Traits>
792inline _LIBCPP_INLINE_VISIBILITY
793_CharT
794basic_ios<_CharT, _Traits>::fill(char_type __ch)
795{
796    char_type __r = __fill_;
797    __fill_ = __ch;
798    return __r;
799}
800
801template <class _CharT, class _Traits>
802basic_ios<_CharT, _Traits>&
803basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
804{
805    if (this != &__rhs)
806    {
807        __call_callbacks(erase_event);
808        ios_base::copyfmt(__rhs);
809        __tie_ = __rhs.__tie_;
810        __fill_ = __rhs.__fill_;
811        __call_callbacks(copyfmt_event);
812        exceptions(__rhs.exceptions());
813    }
814    return *this;
815}
816
817template <class _CharT, class _Traits>
818inline _LIBCPP_INLINE_VISIBILITY
819void
820basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
821{
822    ios_base::move(__rhs);
823    __tie_ = __rhs.__tie_;
824    __rhs.__tie_ = 0;
825    __fill_ = __rhs.__fill_;
826}
827
828template <class _CharT, class _Traits>
829inline _LIBCPP_INLINE_VISIBILITY
830void
831basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
832{
833    ios_base::swap(__rhs);
834    _VSTD::swap(__tie_, __rhs.__tie_);
835    _VSTD::swap(__fill_, __rhs.__fill_);
836}
837
838template <class _CharT, class _Traits>
839inline _LIBCPP_INLINE_VISIBILITY
840void
841basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
842{
843    ios_base::set_rdbuf(__sb);
844}
845
846inline
847ios_base&
848boolalpha(ios_base& __str)
849{
850    __str.setf(ios_base::boolalpha);
851    return __str;
852}
853
854inline
855ios_base&
856noboolalpha(ios_base& __str)
857{
858    __str.unsetf(ios_base::boolalpha);
859    return __str;
860}
861
862inline
863ios_base&
864showbase(ios_base& __str)
865{
866    __str.setf(ios_base::showbase);
867    return __str;
868}
869
870inline
871ios_base&
872noshowbase(ios_base& __str)
873{
874    __str.unsetf(ios_base::showbase);
875    return __str;
876}
877
878inline
879ios_base&
880showpoint(ios_base& __str)
881{
882    __str.setf(ios_base::showpoint);
883    return __str;
884}
885
886inline
887ios_base&
888noshowpoint(ios_base& __str)
889{
890    __str.unsetf(ios_base::showpoint);
891    return __str;
892}
893
894inline
895ios_base&
896showpos(ios_base& __str)
897{
898    __str.setf(ios_base::showpos);
899    return __str;
900}
901
902inline
903ios_base&
904noshowpos(ios_base& __str)
905{
906    __str.unsetf(ios_base::showpos);
907    return __str;
908}
909
910inline
911ios_base&
912skipws(ios_base& __str)
913{
914    __str.setf(ios_base::skipws);
915    return __str;
916}
917
918inline
919ios_base&
920noskipws(ios_base& __str)
921{
922    __str.unsetf(ios_base::skipws);
923    return __str;
924}
925
926inline
927ios_base&
928uppercase(ios_base& __str)
929{
930    __str.setf(ios_base::uppercase);
931    return __str;
932}
933
934inline
935ios_base&
936nouppercase(ios_base& __str)
937{
938    __str.unsetf(ios_base::uppercase);
939    return __str;
940}
941
942inline
943ios_base&
944unitbuf(ios_base& __str)
945{
946    __str.setf(ios_base::unitbuf);
947    return __str;
948}
949
950inline
951ios_base&
952nounitbuf(ios_base& __str)
953{
954    __str.unsetf(ios_base::unitbuf);
955    return __str;
956}
957
958inline
959ios_base&
960internal(ios_base& __str)
961{
962    __str.setf(ios_base::internal, ios_base::adjustfield);
963    return __str;
964}
965
966inline
967ios_base&
968left(ios_base& __str)
969{
970    __str.setf(ios_base::left, ios_base::adjustfield);
971    return __str;
972}
973
974inline
975ios_base&
976right(ios_base& __str)
977{
978    __str.setf(ios_base::right, ios_base::adjustfield);
979    return __str;
980}
981
982inline
983ios_base&
984dec(ios_base& __str)
985{
986    __str.setf(ios_base::dec, ios_base::basefield);
987    return __str;
988}
989
990inline
991ios_base&
992hex(ios_base& __str)
993{
994    __str.setf(ios_base::hex, ios_base::basefield);
995    return __str;
996}
997
998inline
999ios_base&
1000oct(ios_base& __str)
1001{
1002    __str.setf(ios_base::oct, ios_base::basefield);
1003    return __str;
1004}
1005
1006inline
1007ios_base&
1008fixed(ios_base& __str)
1009{
1010    __str.setf(ios_base::fixed, ios_base::floatfield);
1011    return __str;
1012}
1013
1014inline
1015ios_base&
1016scientific(ios_base& __str)
1017{
1018    __str.setf(ios_base::scientific, ios_base::floatfield);
1019    return __str;
1020}
1021
1022inline
1023ios_base&
1024hexfloat(ios_base& __str)
1025{
1026    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
1027    return __str;
1028}
1029
1030inline
1031ios_base&
1032defaultfloat(ios_base& __str)
1033{
1034    __str.unsetf(ios_base::floatfield);
1035    return __str;
1036}
1037
1038template <class _CharT, class _Traits>
1039class __save_flags
1040{
1041    typedef basic_ios<_CharT, _Traits> __stream_type;
1042    typedef typename __stream_type::fmtflags fmtflags;
1043
1044    __stream_type& __stream_;
1045    fmtflags       __fmtflags_;
1046    _CharT         __fill_;
1047
1048    __save_flags(const __save_flags&);
1049    __save_flags& operator=(const __save_flags&);
1050public:
1051    _LIBCPP_INLINE_VISIBILITY
1052    explicit __save_flags(__stream_type& __stream)
1053        : __stream_(__stream),
1054          __fmtflags_(__stream.flags()),
1055          __fill_(__stream.fill())
1056        {}
1057    _LIBCPP_INLINE_VISIBILITY
1058    ~__save_flags()
1059    {
1060        __stream_.flags(__fmtflags_);
1061        __stream_.fill(__fill_);
1062    }
1063};
1064
1065_LIBCPP_END_NAMESPACE_STD
1066
1067#endif  // _LIBCPP_IOS
1068