xref: /llvm-project-15.0.7/libcxx/include/ios (revision ca715b6e) 
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
333protected:
334    _LIBCPP_INLINE_VISIBILITY
335    ios_base() {// purposefully does no initialization
336               }
337
338    void init(void* __sb);
339    _LIBCPP_INLINE_VISIBILITY void* rdbuf() const {return __rdbuf_;}
340
341    _LIBCPP_INLINE_VISIBILITY
342    void rdbuf(void* __sb)
343    {
344        __rdbuf_ = __sb;
345        clear();
346    }
347
348    void __call_callbacks(event);
349    void copyfmt(const ios_base&);
350    void move(ios_base&);
351    void swap(ios_base&) _NOEXCEPT;
352
353    _LIBCPP_INLINE_VISIBILITY
354    void set_rdbuf(void* __sb)
355    {
356        __rdbuf_ = __sb;
357    }
358
359private:
360    // All data members must be scalars
361    fmtflags        __fmtflags_;
362    streamsize      __precision_;
363    streamsize      __width_;
364    iostate         __rdstate_;
365    iostate         __exceptions_;
366    void*           __rdbuf_;
367    void*           __loc_;
368    event_callback* __fn_;
369    int*            __index_;
370    size_t          __event_size_;
371    size_t          __event_cap_;
372// TODO(EricWF): Enable this for both Clang and GCC. Currently it is only
373// enabled with clang.
374#if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
375    static atomic<int> __xindex_;
376#else
377    static int      __xindex_;
378#endif
379    long*           __iarray_;
380    size_t          __iarray_size_;
381    size_t          __iarray_cap_;
382    void**          __parray_;
383    size_t          __parray_size_;
384    size_t          __parray_cap_;
385};
386
387//enum class io_errc
388_LIBCPP_DECLARE_STRONG_ENUM(io_errc)
389{
390    stream = 1
391};
392_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(io_errc)
393
394template <>
395struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc> : public true_type { };
396
397#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
398template <>
399struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<io_errc::__lx> : public true_type { };
400#endif
401
402_LIBCPP_FUNC_VIS
403const error_category& iostream_category() _NOEXCEPT;
404
405inline _LIBCPP_INLINE_VISIBILITY
406error_code
407make_error_code(io_errc __e) _NOEXCEPT
408{
409    return error_code(static_cast<int>(__e), iostream_category());
410}
411
412inline _LIBCPP_INLINE_VISIBILITY
413error_condition
414make_error_condition(io_errc __e) _NOEXCEPT
415{
416    return error_condition(static_cast<int>(__e), iostream_category());
417}
418
419class _LIBCPP_EXCEPTION_ABI ios_base::failure
420    : public system_error
421{
422public:
423    explicit failure(const string& __msg, const error_code& __ec = io_errc::stream);
424    explicit failure(const char* __msg, const error_code& __ec = io_errc::stream);
425    virtual ~failure() throw();
426};
427
428_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
429void __throw_failure(char const* __msg) {
430#ifndef _LIBCPP_NO_EXCEPTIONS
431    throw ios_base::failure(__msg);
432#else
433    ((void)__msg);
434    _VSTD::abort();
435#endif
436}
437
438class _LIBCPP_TYPE_VIS ios_base::Init
439{
440public:
441    Init();
442    ~Init();
443};
444
445// fmtflags
446
447inline _LIBCPP_INLINE_VISIBILITY
448ios_base::fmtflags
449ios_base::flags() const
450{
451    return __fmtflags_;
452}
453
454inline _LIBCPP_INLINE_VISIBILITY
455ios_base::fmtflags
456ios_base::flags(fmtflags __fmtfl)
457{
458    fmtflags __r = __fmtflags_;
459    __fmtflags_ = __fmtfl;
460    return __r;
461}
462
463inline _LIBCPP_INLINE_VISIBILITY
464ios_base::fmtflags
465ios_base::setf(fmtflags __fmtfl)
466{
467    fmtflags __r = __fmtflags_;
468    __fmtflags_ |= __fmtfl;
469    return __r;
470}
471
472inline _LIBCPP_INLINE_VISIBILITY
473void
474ios_base::unsetf(fmtflags __mask)
475{
476    __fmtflags_ &= ~__mask;
477}
478
479inline _LIBCPP_INLINE_VISIBILITY
480ios_base::fmtflags
481ios_base::setf(fmtflags __fmtfl, fmtflags __mask)
482{
483    fmtflags __r = __fmtflags_;
484    unsetf(__mask);
485    __fmtflags_ |= __fmtfl & __mask;
486    return __r;
487}
488
489// precision
490
491inline _LIBCPP_INLINE_VISIBILITY
492streamsize
493ios_base::precision() const
494{
495    return __precision_;
496}
497
498inline _LIBCPP_INLINE_VISIBILITY
499streamsize
500ios_base::precision(streamsize __prec)
501{
502    streamsize __r = __precision_;
503    __precision_ = __prec;
504    return __r;
505}
506
507// width
508
509inline _LIBCPP_INLINE_VISIBILITY
510streamsize
511ios_base::width() const
512{
513    return __width_;
514}
515
516inline _LIBCPP_INLINE_VISIBILITY
517streamsize
518ios_base::width(streamsize __wide)
519{
520    streamsize __r = __width_;
521    __width_ = __wide;
522    return __r;
523}
524
525// iostate
526
527inline _LIBCPP_INLINE_VISIBILITY
528ios_base::iostate
529ios_base::rdstate() const
530{
531    return __rdstate_;
532}
533
534inline _LIBCPP_INLINE_VISIBILITY
535void
536ios_base::setstate(iostate __state)
537{
538    clear(__rdstate_ | __state);
539}
540
541inline _LIBCPP_INLINE_VISIBILITY
542bool
543ios_base::good() const
544{
545    return __rdstate_ == 0;
546}
547
548inline _LIBCPP_INLINE_VISIBILITY
549bool
550ios_base::eof() const
551{
552    return (__rdstate_ & eofbit) != 0;
553}
554
555inline _LIBCPP_INLINE_VISIBILITY
556bool
557ios_base::fail() const
558{
559    return (__rdstate_ & (failbit | badbit)) != 0;
560}
561
562inline _LIBCPP_INLINE_VISIBILITY
563bool
564ios_base::bad() const
565{
566    return (__rdstate_ & badbit) != 0;
567}
568
569inline _LIBCPP_INLINE_VISIBILITY
570ios_base::iostate
571ios_base::exceptions() const
572{
573    return __exceptions_;
574}
575
576inline _LIBCPP_INLINE_VISIBILITY
577void
578ios_base::exceptions(iostate __iostate)
579{
580    __exceptions_ = __iostate;
581    clear(__rdstate_);
582}
583
584#if defined(_LIBCPP_CXX03_LANG)
585struct _LIBCPP_TYPE_VIS __cxx03_bool {
586  typedef void (__cxx03_bool::*__bool_type)();
587  void __true_value() {}
588};
589#endif
590
591template <class _CharT, class _Traits>
592class _LIBCPP_TEMPLATE_VIS basic_ios
593    : public ios_base
594{
595public:
596    // types:
597    typedef _CharT char_type;
598    typedef _Traits traits_type;
599
600    typedef typename traits_type::int_type int_type;
601    typedef typename traits_type::pos_type pos_type;
602    typedef typename traits_type::off_type off_type;
603
604    static_assert((is_same<_CharT, typename traits_type::char_type>::value),
605                  "traits_type::char_type must be the same type as CharT");
606
607  // __true_value will generate undefined references when linking unless
608  // we give it internal linkage.
609
610#if defined(_LIBCPP_CXX03_LANG)
611    _LIBCPP_INLINE_VISIBILITY
612    operator __cxx03_bool::__bool_type() const {
613        return !fail() ? &__cxx03_bool::__true_value : nullptr;
614    }
615#else
616    _LIBCPP_INLINE_VISIBILITY
617    _LIBCPP_EXPLICIT operator bool() const {return !fail();}
618#endif
619
620    _LIBCPP_INLINE_VISIBILITY bool operator!() const    {return  fail();}
621    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const   {return ios_base::rdstate();}
622    _LIBCPP_INLINE_VISIBILITY void clear(iostate __state = goodbit) {ios_base::clear(__state);}
623    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state) {ios_base::setstate(__state);}
624    _LIBCPP_INLINE_VISIBILITY bool good() const {return ios_base::good();}
625    _LIBCPP_INLINE_VISIBILITY bool eof() const  {return ios_base::eof();}
626    _LIBCPP_INLINE_VISIBILITY bool fail() const {return ios_base::fail();}
627    _LIBCPP_INLINE_VISIBILITY bool bad() const  {return ios_base::bad();}
628
629    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const {return ios_base::exceptions();}
630    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
631
632    // 27.5.4.1 Constructor/destructor:
633    _LIBCPP_INLINE_VISIBILITY
634    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
635    virtual ~basic_ios();
636
637    // 27.5.4.2 Members:
638    _LIBCPP_INLINE_VISIBILITY
639    basic_ostream<char_type, traits_type>* tie() const;
640    _LIBCPP_INLINE_VISIBILITY
641    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
642
643    _LIBCPP_INLINE_VISIBILITY
644    basic_streambuf<char_type, traits_type>* rdbuf() const;
645    _LIBCPP_INLINE_VISIBILITY
646    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
647
648    basic_ios& copyfmt(const basic_ios& __rhs);
649
650    _LIBCPP_INLINE_VISIBILITY
651    char_type fill() const;
652    _LIBCPP_INLINE_VISIBILITY
653    char_type fill(char_type __ch);
654
655    _LIBCPP_INLINE_VISIBILITY
656    locale imbue(const locale& __loc);
657
658    _LIBCPP_INLINE_VISIBILITY
659    char narrow(char_type __c, char __dfault) const;
660    _LIBCPP_INLINE_VISIBILITY
661    char_type widen(char __c) const;
662
663protected:
664    _LIBCPP_INLINE_VISIBILITY
665    basic_ios() {// purposefully does no initialization
666                }
667    _LIBCPP_INLINE_VISIBILITY
668    void init(basic_streambuf<char_type, traits_type>* __sb);
669
670    _LIBCPP_INLINE_VISIBILITY
671    void move(basic_ios& __rhs);
672#ifndef _LIBCPP_CXX03_LANG
673    _LIBCPP_INLINE_VISIBILITY
674    void move(basic_ios&& __rhs) {move(__rhs);}
675#endif
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_ = 0;
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    char_type __r = __fill_;
787    __fill_ = __ch;
788    return __r;
789}
790
791template <class _CharT, class _Traits>
792basic_ios<_CharT, _Traits>&
793basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
794{
795    if (this != &__rhs)
796    {
797        __call_callbacks(erase_event);
798        ios_base::copyfmt(__rhs);
799        __tie_ = __rhs.__tie_;
800        __fill_ = __rhs.__fill_;
801        __call_callbacks(copyfmt_event);
802        exceptions(__rhs.exceptions());
803    }
804    return *this;
805}
806
807template <class _CharT, class _Traits>
808inline _LIBCPP_INLINE_VISIBILITY
809void
810basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
811{
812    ios_base::move(__rhs);
813    __tie_ = __rhs.__tie_;
814    __rhs.__tie_ = 0;
815    __fill_ = __rhs.__fill_;
816}
817
818template <class _CharT, class _Traits>
819inline _LIBCPP_INLINE_VISIBILITY
820void
821basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
822{
823    ios_base::swap(__rhs);
824    _VSTD::swap(__tie_, __rhs.__tie_);
825    _VSTD::swap(__fill_, __rhs.__fill_);
826}
827
828template <class _CharT, class _Traits>
829inline _LIBCPP_INLINE_VISIBILITY
830void
831basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
832{
833    ios_base::set_rdbuf(__sb);
834}
835
836inline _LIBCPP_INLINE_VISIBILITY
837ios_base&
838boolalpha(ios_base& __str)
839{
840    __str.setf(ios_base::boolalpha);
841    return __str;
842}
843
844inline _LIBCPP_INLINE_VISIBILITY
845ios_base&
846noboolalpha(ios_base& __str)
847{
848    __str.unsetf(ios_base::boolalpha);
849    return __str;
850}
851
852inline _LIBCPP_INLINE_VISIBILITY
853ios_base&
854showbase(ios_base& __str)
855{
856    __str.setf(ios_base::showbase);
857    return __str;
858}
859
860inline _LIBCPP_INLINE_VISIBILITY
861ios_base&
862noshowbase(ios_base& __str)
863{
864    __str.unsetf(ios_base::showbase);
865    return __str;
866}
867
868inline _LIBCPP_INLINE_VISIBILITY
869ios_base&
870showpoint(ios_base& __str)
871{
872    __str.setf(ios_base::showpoint);
873    return __str;
874}
875
876inline _LIBCPP_INLINE_VISIBILITY
877ios_base&
878noshowpoint(ios_base& __str)
879{
880    __str.unsetf(ios_base::showpoint);
881    return __str;
882}
883
884inline _LIBCPP_INLINE_VISIBILITY
885ios_base&
886showpos(ios_base& __str)
887{
888    __str.setf(ios_base::showpos);
889    return __str;
890}
891
892inline _LIBCPP_INLINE_VISIBILITY
893ios_base&
894noshowpos(ios_base& __str)
895{
896    __str.unsetf(ios_base::showpos);
897    return __str;
898}
899
900inline _LIBCPP_INLINE_VISIBILITY
901ios_base&
902skipws(ios_base& __str)
903{
904    __str.setf(ios_base::skipws);
905    return __str;
906}
907
908inline _LIBCPP_INLINE_VISIBILITY
909ios_base&
910noskipws(ios_base& __str)
911{
912    __str.unsetf(ios_base::skipws);
913    return __str;
914}
915
916inline _LIBCPP_INLINE_VISIBILITY
917ios_base&
918uppercase(ios_base& __str)
919{
920    __str.setf(ios_base::uppercase);
921    return __str;
922}
923
924inline _LIBCPP_INLINE_VISIBILITY
925ios_base&
926nouppercase(ios_base& __str)
927{
928    __str.unsetf(ios_base::uppercase);
929    return __str;
930}
931
932inline _LIBCPP_INLINE_VISIBILITY
933ios_base&
934unitbuf(ios_base& __str)
935{
936    __str.setf(ios_base::unitbuf);
937    return __str;
938}
939
940inline _LIBCPP_INLINE_VISIBILITY
941ios_base&
942nounitbuf(ios_base& __str)
943{
944    __str.unsetf(ios_base::unitbuf);
945    return __str;
946}
947
948inline _LIBCPP_INLINE_VISIBILITY
949ios_base&
950internal(ios_base& __str)
951{
952    __str.setf(ios_base::internal, ios_base::adjustfield);
953    return __str;
954}
955
956inline _LIBCPP_INLINE_VISIBILITY
957ios_base&
958left(ios_base& __str)
959{
960    __str.setf(ios_base::left, ios_base::adjustfield);
961    return __str;
962}
963
964inline _LIBCPP_INLINE_VISIBILITY
965ios_base&
966right(ios_base& __str)
967{
968    __str.setf(ios_base::right, ios_base::adjustfield);
969    return __str;
970}
971
972inline _LIBCPP_INLINE_VISIBILITY
973ios_base&
974dec(ios_base& __str)
975{
976    __str.setf(ios_base::dec, ios_base::basefield);
977    return __str;
978}
979
980inline _LIBCPP_INLINE_VISIBILITY
981ios_base&
982hex(ios_base& __str)
983{
984    __str.setf(ios_base::hex, ios_base::basefield);
985    return __str;
986}
987
988inline _LIBCPP_INLINE_VISIBILITY
989ios_base&
990oct(ios_base& __str)
991{
992    __str.setf(ios_base::oct, ios_base::basefield);
993    return __str;
994}
995
996inline _LIBCPP_INLINE_VISIBILITY
997ios_base&
998fixed(ios_base& __str)
999{
1000    __str.setf(ios_base::fixed, ios_base::floatfield);
1001    return __str;
1002}
1003
1004inline _LIBCPP_INLINE_VISIBILITY
1005ios_base&
1006scientific(ios_base& __str)
1007{
1008    __str.setf(ios_base::scientific, ios_base::floatfield);
1009    return __str;
1010}
1011
1012inline _LIBCPP_INLINE_VISIBILITY
1013ios_base&
1014hexfloat(ios_base& __str)
1015{
1016    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
1017    return __str;
1018}
1019
1020inline _LIBCPP_INLINE_VISIBILITY
1021ios_base&
1022defaultfloat(ios_base& __str)
1023{
1024    __str.unsetf(ios_base::floatfield);
1025    return __str;
1026}
1027
1028template <class _CharT, class _Traits>
1029class __save_flags
1030{
1031    typedef basic_ios<_CharT, _Traits> __stream_type;
1032    typedef typename __stream_type::fmtflags fmtflags;
1033
1034    __stream_type& __stream_;
1035    fmtflags       __fmtflags_;
1036    _CharT         __fill_;
1037
1038    __save_flags(const __save_flags&);
1039    __save_flags& operator=(const __save_flags&);
1040public:
1041    _LIBCPP_INLINE_VISIBILITY
1042    explicit __save_flags(__stream_type& __stream)
1043        : __stream_(__stream),
1044          __fmtflags_(__stream.flags()),
1045          __fill_(__stream.fill())
1046        {}
1047    _LIBCPP_INLINE_VISIBILITY
1048    ~__save_flags()
1049    {
1050        __stream_.flags(__fmtflags_);
1051        __stream_.fill(__fill_);
1052    }
1053};
1054
1055_LIBCPP_END_NAMESPACE_STD
1056
1057#endif  // _LIBCPP_IOS
1058