xref: /freebsd/contrib/llvm-project/libcxx/include/ios (revision 6966ac055c3b7a39266fb982493330df7a097997) 
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    virtual ~failure() throw();
435};
436
437_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
438void __throw_failure(char const* __msg) {
439#ifndef _LIBCPP_NO_EXCEPTIONS
440    throw ios_base::failure(__msg);
441#else
442    ((void)__msg);
443    _VSTD::abort();
444#endif
445}
446
447class _LIBCPP_TYPE_VIS ios_base::Init
448{
449public:
450    Init();
451    ~Init();
452};
453
454// fmtflags
455
456inline _LIBCPP_INLINE_VISIBILITY
457ios_base::fmtflags
458ios_base::flags() const
459{
460    return __fmtflags_;
461}
462
463inline _LIBCPP_INLINE_VISIBILITY
464ios_base::fmtflags
465ios_base::flags(fmtflags __fmtfl)
466{
467    fmtflags __r = __fmtflags_;
468    __fmtflags_ = __fmtfl;
469    return __r;
470}
471
472inline _LIBCPP_INLINE_VISIBILITY
473ios_base::fmtflags
474ios_base::setf(fmtflags __fmtfl)
475{
476    fmtflags __r = __fmtflags_;
477    __fmtflags_ |= __fmtfl;
478    return __r;
479}
480
481inline _LIBCPP_INLINE_VISIBILITY
482void
483ios_base::unsetf(fmtflags __mask)
484{
485    __fmtflags_ &= ~__mask;
486}
487
488inline _LIBCPP_INLINE_VISIBILITY
489ios_base::fmtflags
490ios_base::setf(fmtflags __fmtfl, fmtflags __mask)
491{
492    fmtflags __r = __fmtflags_;
493    unsetf(__mask);
494    __fmtflags_ |= __fmtfl & __mask;
495    return __r;
496}
497
498// precision
499
500inline _LIBCPP_INLINE_VISIBILITY
501streamsize
502ios_base::precision() const
503{
504    return __precision_;
505}
506
507inline _LIBCPP_INLINE_VISIBILITY
508streamsize
509ios_base::precision(streamsize __prec)
510{
511    streamsize __r = __precision_;
512    __precision_ = __prec;
513    return __r;
514}
515
516// width
517
518inline _LIBCPP_INLINE_VISIBILITY
519streamsize
520ios_base::width() const
521{
522    return __width_;
523}
524
525inline _LIBCPP_INLINE_VISIBILITY
526streamsize
527ios_base::width(streamsize __wide)
528{
529    streamsize __r = __width_;
530    __width_ = __wide;
531    return __r;
532}
533
534// iostate
535
536inline _LIBCPP_INLINE_VISIBILITY
537ios_base::iostate
538ios_base::rdstate() const
539{
540    return __rdstate_;
541}
542
543inline _LIBCPP_INLINE_VISIBILITY
544void
545ios_base::setstate(iostate __state)
546{
547    clear(__rdstate_ | __state);
548}
549
550inline _LIBCPP_INLINE_VISIBILITY
551bool
552ios_base::good() const
553{
554    return __rdstate_ == 0;
555}
556
557inline _LIBCPP_INLINE_VISIBILITY
558bool
559ios_base::eof() const
560{
561    return (__rdstate_ & eofbit) != 0;
562}
563
564inline _LIBCPP_INLINE_VISIBILITY
565bool
566ios_base::fail() const
567{
568    return (__rdstate_ & (failbit | badbit)) != 0;
569}
570
571inline _LIBCPP_INLINE_VISIBILITY
572bool
573ios_base::bad() const
574{
575    return (__rdstate_ & badbit) != 0;
576}
577
578inline _LIBCPP_INLINE_VISIBILITY
579ios_base::iostate
580ios_base::exceptions() const
581{
582    return __exceptions_;
583}
584
585inline _LIBCPP_INLINE_VISIBILITY
586void
587ios_base::exceptions(iostate __iostate)
588{
589    __exceptions_ = __iostate;
590    clear(__rdstate_);
591}
592
593#if defined(_LIBCPP_CXX03_LANG)
594struct _LIBCPP_TYPE_VIS __cxx03_bool {
595  typedef void (__cxx03_bool::*__bool_type)();
596  void __true_value() {}
597};
598#endif
599
600template <class _CharT, class _Traits>
601class _LIBCPP_TEMPLATE_VIS basic_ios
602    : public ios_base
603{
604public:
605    // types:
606    typedef _CharT char_type;
607    typedef _Traits traits_type;
608
609    typedef typename traits_type::int_type int_type;
610    typedef typename traits_type::pos_type pos_type;
611    typedef typename traits_type::off_type off_type;
612
613    static_assert((is_same<_CharT, typename traits_type::char_type>::value),
614                  "traits_type::char_type must be the same type as CharT");
615
616  // __true_value will generate undefined references when linking unless
617  // we give it internal linkage.
618
619#if defined(_LIBCPP_CXX03_LANG)
620    _LIBCPP_INLINE_VISIBILITY
621    operator __cxx03_bool::__bool_type() const {
622        return !fail() ? &__cxx03_bool::__true_value : nullptr;
623    }
624#else
625    _LIBCPP_INLINE_VISIBILITY
626    _LIBCPP_EXPLICIT operator bool() const {return !fail();}
627#endif
628
629    _LIBCPP_INLINE_VISIBILITY bool operator!() const    {return  fail();}
630    _LIBCPP_INLINE_VISIBILITY iostate rdstate() const   {return ios_base::rdstate();}
631    _LIBCPP_INLINE_VISIBILITY void clear(iostate __state = goodbit) {ios_base::clear(__state);}
632    _LIBCPP_INLINE_VISIBILITY void setstate(iostate __state) {ios_base::setstate(__state);}
633    _LIBCPP_INLINE_VISIBILITY bool good() const {return ios_base::good();}
634    _LIBCPP_INLINE_VISIBILITY bool eof() const  {return ios_base::eof();}
635    _LIBCPP_INLINE_VISIBILITY bool fail() const {return ios_base::fail();}
636    _LIBCPP_INLINE_VISIBILITY bool bad() const  {return ios_base::bad();}
637
638    _LIBCPP_INLINE_VISIBILITY iostate exceptions() const {return ios_base::exceptions();}
639    _LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
640
641    // 27.5.4.1 Constructor/destructor:
642    _LIBCPP_INLINE_VISIBILITY
643    explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
644    virtual ~basic_ios();
645
646    // 27.5.4.2 Members:
647    _LIBCPP_INLINE_VISIBILITY
648    basic_ostream<char_type, traits_type>* tie() const;
649    _LIBCPP_INLINE_VISIBILITY
650    basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);
651
652    _LIBCPP_INLINE_VISIBILITY
653    basic_streambuf<char_type, traits_type>* rdbuf() const;
654    _LIBCPP_INLINE_VISIBILITY
655    basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);
656
657    basic_ios& copyfmt(const basic_ios& __rhs);
658
659    _LIBCPP_INLINE_VISIBILITY
660    char_type fill() const;
661    _LIBCPP_INLINE_VISIBILITY
662    char_type fill(char_type __ch);
663
664    _LIBCPP_INLINE_VISIBILITY
665    locale imbue(const locale& __loc);
666
667    _LIBCPP_INLINE_VISIBILITY
668    char narrow(char_type __c, char __dfault) const;
669    _LIBCPP_INLINE_VISIBILITY
670    char_type widen(char __c) const;
671
672protected:
673    _LIBCPP_INLINE_VISIBILITY
674    basic_ios() {// purposefully does no initialization
675                }
676    _LIBCPP_INLINE_VISIBILITY
677    void init(basic_streambuf<char_type, traits_type>* __sb);
678
679    _LIBCPP_INLINE_VISIBILITY
680    void move(basic_ios& __rhs);
681#ifndef _LIBCPP_CXX03_LANG
682    _LIBCPP_INLINE_VISIBILITY
683    void move(basic_ios&& __rhs) {move(__rhs);}
684#endif
685    _LIBCPP_INLINE_VISIBILITY
686    void swap(basic_ios& __rhs) _NOEXCEPT;
687    _LIBCPP_INLINE_VISIBILITY
688    void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
689private:
690    basic_ostream<char_type, traits_type>* __tie_;
691    mutable int_type __fill_;
692};
693
694template <class _CharT, class _Traits>
695inline _LIBCPP_INLINE_VISIBILITY
696basic_ios<_CharT, _Traits>::basic_ios(basic_streambuf<char_type,traits_type>* __sb)
697{
698    init(__sb);
699}
700
701template <class _CharT, class _Traits>
702basic_ios<_CharT, _Traits>::~basic_ios()
703{
704}
705
706template <class _CharT, class _Traits>
707inline _LIBCPP_INLINE_VISIBILITY
708void
709basic_ios<_CharT, _Traits>::init(basic_streambuf<char_type, traits_type>* __sb)
710{
711    ios_base::init(__sb);
712    __tie_ = 0;
713    __fill_ = traits_type::eof();
714}
715
716template <class _CharT, class _Traits>
717inline _LIBCPP_INLINE_VISIBILITY
718basic_ostream<_CharT, _Traits>*
719basic_ios<_CharT, _Traits>::tie() const
720{
721    return __tie_;
722}
723
724template <class _CharT, class _Traits>
725inline _LIBCPP_INLINE_VISIBILITY
726basic_ostream<_CharT, _Traits>*
727basic_ios<_CharT, _Traits>::tie(basic_ostream<char_type, traits_type>* __tiestr)
728{
729    basic_ostream<char_type, traits_type>* __r = __tie_;
730    __tie_ = __tiestr;
731    return __r;
732}
733
734template <class _CharT, class _Traits>
735inline _LIBCPP_INLINE_VISIBILITY
736basic_streambuf<_CharT, _Traits>*
737basic_ios<_CharT, _Traits>::rdbuf() const
738{
739    return static_cast<basic_streambuf<char_type, traits_type>*>(ios_base::rdbuf());
740}
741
742template <class _CharT, class _Traits>
743inline _LIBCPP_INLINE_VISIBILITY
744basic_streambuf<_CharT, _Traits>*
745basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<char_type, traits_type>* __sb)
746{
747    basic_streambuf<char_type, traits_type>* __r = rdbuf();
748    ios_base::rdbuf(__sb);
749    return __r;
750}
751
752template <class _CharT, class _Traits>
753inline _LIBCPP_INLINE_VISIBILITY
754locale
755basic_ios<_CharT, _Traits>::imbue(const locale& __loc)
756{
757    locale __r = getloc();
758    ios_base::imbue(__loc);
759    if (rdbuf())
760        rdbuf()->pubimbue(__loc);
761    return __r;
762}
763
764template <class _CharT, class _Traits>
765inline _LIBCPP_INLINE_VISIBILITY
766char
767basic_ios<_CharT, _Traits>::narrow(char_type __c, char __dfault) const
768{
769    return use_facet<ctype<char_type> >(getloc()).narrow(__c, __dfault);
770}
771
772template <class _CharT, class _Traits>
773inline _LIBCPP_INLINE_VISIBILITY
774_CharT
775basic_ios<_CharT, _Traits>::widen(char __c) const
776{
777    return use_facet<ctype<char_type> >(getloc()).widen(__c);
778}
779
780template <class _CharT, class _Traits>
781inline _LIBCPP_INLINE_VISIBILITY
782_CharT
783basic_ios<_CharT, _Traits>::fill() const
784{
785    if (traits_type::eq_int_type(traits_type::eof(), __fill_))
786        __fill_ = widen(' ');
787    return __fill_;
788}
789
790template <class _CharT, class _Traits>
791inline _LIBCPP_INLINE_VISIBILITY
792_CharT
793basic_ios<_CharT, _Traits>::fill(char_type __ch)
794{
795    char_type __r = __fill_;
796    __fill_ = __ch;
797    return __r;
798}
799
800template <class _CharT, class _Traits>
801basic_ios<_CharT, _Traits>&
802basic_ios<_CharT, _Traits>::copyfmt(const basic_ios& __rhs)
803{
804    if (this != &__rhs)
805    {
806        __call_callbacks(erase_event);
807        ios_base::copyfmt(__rhs);
808        __tie_ = __rhs.__tie_;
809        __fill_ = __rhs.__fill_;
810        __call_callbacks(copyfmt_event);
811        exceptions(__rhs.exceptions());
812    }
813    return *this;
814}
815
816template <class _CharT, class _Traits>
817inline _LIBCPP_INLINE_VISIBILITY
818void
819basic_ios<_CharT, _Traits>::move(basic_ios& __rhs)
820{
821    ios_base::move(__rhs);
822    __tie_ = __rhs.__tie_;
823    __rhs.__tie_ = 0;
824    __fill_ = __rhs.__fill_;
825}
826
827template <class _CharT, class _Traits>
828inline _LIBCPP_INLINE_VISIBILITY
829void
830basic_ios<_CharT, _Traits>::swap(basic_ios& __rhs) _NOEXCEPT
831{
832    ios_base::swap(__rhs);
833    _VSTD::swap(__tie_, __rhs.__tie_);
834    _VSTD::swap(__fill_, __rhs.__fill_);
835}
836
837template <class _CharT, class _Traits>
838inline _LIBCPP_INLINE_VISIBILITY
839void
840basic_ios<_CharT, _Traits>::set_rdbuf(basic_streambuf<char_type, traits_type>* __sb)
841{
842    ios_base::set_rdbuf(__sb);
843}
844
845inline _LIBCPP_INLINE_VISIBILITY
846ios_base&
847boolalpha(ios_base& __str)
848{
849    __str.setf(ios_base::boolalpha);
850    return __str;
851}
852
853inline _LIBCPP_INLINE_VISIBILITY
854ios_base&
855noboolalpha(ios_base& __str)
856{
857    __str.unsetf(ios_base::boolalpha);
858    return __str;
859}
860
861inline _LIBCPP_INLINE_VISIBILITY
862ios_base&
863showbase(ios_base& __str)
864{
865    __str.setf(ios_base::showbase);
866    return __str;
867}
868
869inline _LIBCPP_INLINE_VISIBILITY
870ios_base&
871noshowbase(ios_base& __str)
872{
873    __str.unsetf(ios_base::showbase);
874    return __str;
875}
876
877inline _LIBCPP_INLINE_VISIBILITY
878ios_base&
879showpoint(ios_base& __str)
880{
881    __str.setf(ios_base::showpoint);
882    return __str;
883}
884
885inline _LIBCPP_INLINE_VISIBILITY
886ios_base&
887noshowpoint(ios_base& __str)
888{
889    __str.unsetf(ios_base::showpoint);
890    return __str;
891}
892
893inline _LIBCPP_INLINE_VISIBILITY
894ios_base&
895showpos(ios_base& __str)
896{
897    __str.setf(ios_base::showpos);
898    return __str;
899}
900
901inline _LIBCPP_INLINE_VISIBILITY
902ios_base&
903noshowpos(ios_base& __str)
904{
905    __str.unsetf(ios_base::showpos);
906    return __str;
907}
908
909inline _LIBCPP_INLINE_VISIBILITY
910ios_base&
911skipws(ios_base& __str)
912{
913    __str.setf(ios_base::skipws);
914    return __str;
915}
916
917inline _LIBCPP_INLINE_VISIBILITY
918ios_base&
919noskipws(ios_base& __str)
920{
921    __str.unsetf(ios_base::skipws);
922    return __str;
923}
924
925inline _LIBCPP_INLINE_VISIBILITY
926ios_base&
927uppercase(ios_base& __str)
928{
929    __str.setf(ios_base::uppercase);
930    return __str;
931}
932
933inline _LIBCPP_INLINE_VISIBILITY
934ios_base&
935nouppercase(ios_base& __str)
936{
937    __str.unsetf(ios_base::uppercase);
938    return __str;
939}
940
941inline _LIBCPP_INLINE_VISIBILITY
942ios_base&
943unitbuf(ios_base& __str)
944{
945    __str.setf(ios_base::unitbuf);
946    return __str;
947}
948
949inline _LIBCPP_INLINE_VISIBILITY
950ios_base&
951nounitbuf(ios_base& __str)
952{
953    __str.unsetf(ios_base::unitbuf);
954    return __str;
955}
956
957inline _LIBCPP_INLINE_VISIBILITY
958ios_base&
959internal(ios_base& __str)
960{
961    __str.setf(ios_base::internal, ios_base::adjustfield);
962    return __str;
963}
964
965inline _LIBCPP_INLINE_VISIBILITY
966ios_base&
967left(ios_base& __str)
968{
969    __str.setf(ios_base::left, ios_base::adjustfield);
970    return __str;
971}
972
973inline _LIBCPP_INLINE_VISIBILITY
974ios_base&
975right(ios_base& __str)
976{
977    __str.setf(ios_base::right, ios_base::adjustfield);
978    return __str;
979}
980
981inline _LIBCPP_INLINE_VISIBILITY
982ios_base&
983dec(ios_base& __str)
984{
985    __str.setf(ios_base::dec, ios_base::basefield);
986    return __str;
987}
988
989inline _LIBCPP_INLINE_VISIBILITY
990ios_base&
991hex(ios_base& __str)
992{
993    __str.setf(ios_base::hex, ios_base::basefield);
994    return __str;
995}
996
997inline _LIBCPP_INLINE_VISIBILITY
998ios_base&
999oct(ios_base& __str)
1000{
1001    __str.setf(ios_base::oct, ios_base::basefield);
1002    return __str;
1003}
1004
1005inline _LIBCPP_INLINE_VISIBILITY
1006ios_base&
1007fixed(ios_base& __str)
1008{
1009    __str.setf(ios_base::fixed, ios_base::floatfield);
1010    return __str;
1011}
1012
1013inline _LIBCPP_INLINE_VISIBILITY
1014ios_base&
1015scientific(ios_base& __str)
1016{
1017    __str.setf(ios_base::scientific, ios_base::floatfield);
1018    return __str;
1019}
1020
1021inline _LIBCPP_INLINE_VISIBILITY
1022ios_base&
1023hexfloat(ios_base& __str)
1024{
1025    __str.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
1026    return __str;
1027}
1028
1029inline _LIBCPP_INLINE_VISIBILITY
1030ios_base&
1031defaultfloat(ios_base& __str)
1032{
1033    __str.unsetf(ios_base::floatfield);
1034    return __str;
1035}
1036
1037template <class _CharT, class _Traits>
1038class __save_flags
1039{
1040    typedef basic_ios<_CharT, _Traits> __stream_type;
1041    typedef typename __stream_type::fmtflags fmtflags;
1042
1043    __stream_type& __stream_;
1044    fmtflags       __fmtflags_;
1045    _CharT         __fill_;
1046
1047    __save_flags(const __save_flags&);
1048    __save_flags& operator=(const __save_flags&);
1049public:
1050    _LIBCPP_INLINE_VISIBILITY
1051    explicit __save_flags(__stream_type& __stream)
1052        : __stream_(__stream),
1053          __fmtflags_(__stream.flags()),
1054          __fill_(__stream.fill())
1055        {}
1056    _LIBCPP_INLINE_VISIBILITY
1057    ~__save_flags()
1058    {
1059        __stream_.flags(__fmtflags_);
1060        __stream_.fill(__fill_);
1061    }
1062};
1063
1064_LIBCPP_END_NAMESPACE_STD
1065
1066#endif  // _LIBCPP_IOS
1067