2 //===------------------------- fstream ------------------------------------===//
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
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_FSTREAM
11 #define _LIBCPP_FSTREAM
16 template <class charT, class traits = char_traits<charT> >
18 : public basic_streambuf<charT, traits>
21 typedef charT char_type;
22 typedef traits traits_type;
23 typedef typename traits_type::int_type int_type;
24 typedef typename traits_type::pos_type pos_type;
25 typedef typename traits_type::off_type off_type;
27 // 27.9.1.2 Constructors/destructor:
29 basic_filebuf(basic_filebuf&& rhs);
30 virtual ~basic_filebuf();
32 // 27.9.1.3 Assign/swap:
33 basic_filebuf& operator=(basic_filebuf&& rhs);
34 void swap(basic_filebuf& rhs);
38 basic_filebuf* open(const char* s, ios_base::openmode mode);
39 basic_filebuf* open(const string& s, ios_base::openmode mode);
40 basic_filebuf* open(const filesystem::path& p, ios_base::openmode mode); // C++17
41 basic_filebuf* close();
44 // 27.9.1.5 Overridden virtual functions:
45 virtual streamsize showmanyc();
46 virtual int_type underflow();
47 virtual int_type uflow();
48 virtual int_type pbackfail(int_type c = traits_type::eof());
49 virtual int_type overflow (int_type c = traits_type::eof());
50 virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* s, streamsize n);
51 virtual pos_type seekoff(off_type off, ios_base::seekdir way,
52 ios_base::openmode which = ios_base::in | ios_base::out);
53 virtual pos_type seekpos(pos_type sp,
54 ios_base::openmode which = ios_base::in | ios_base::out);
56 virtual void imbue(const locale& loc);
59 template <class charT, class traits>
61 swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y);
63 typedef basic_filebuf<char> filebuf;
64 typedef basic_filebuf<wchar_t> wfilebuf;
66 template <class charT, class traits = char_traits<charT> >
68 : public basic_istream<charT,traits>
71 typedef charT char_type;
72 typedef traits traits_type;
73 typedef typename traits_type::int_type int_type;
74 typedef typename traits_type::pos_type pos_type;
75 typedef typename traits_type::off_type off_type;
78 explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in);
79 explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in);
80 explicit basic_ifstream(const filesystem::path& p,
81 ios_base::openmode mode = ios_base::in); // C++17
82 basic_ifstream(basic_ifstream&& rhs);
84 basic_ifstream& operator=(basic_ifstream&& rhs);
85 void swap(basic_ifstream& rhs);
87 basic_filebuf<char_type, traits_type>* rdbuf() const;
89 void open(const char* s, ios_base::openmode mode = ios_base::in);
90 void open(const string& s, ios_base::openmode mode = ios_base::in);
91 void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); // C++17
96 template <class charT, class traits>
98 swap(basic_ifstream<charT, traits>& x, basic_ifstream<charT, traits>& y);
100 typedef basic_ifstream<char> ifstream;
101 typedef basic_ifstream<wchar_t> wifstream;
103 template <class charT, class traits = char_traits<charT> >
105 : public basic_ostream<charT,traits>
108 typedef charT char_type;
109 typedef traits traits_type;
110 typedef typename traits_type::int_type int_type;
111 typedef typename traits_type::pos_type pos_type;
112 typedef typename traits_type::off_type off_type;
115 explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out);
116 explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out);
117 explicit basic_ofstream(const filesystem::path& p,
118 ios_base::openmode mode = ios_base::out); // C++17
119 basic_ofstream(basic_ofstream&& rhs);
121 basic_ofstream& operator=(basic_ofstream&& rhs);
122 void swap(basic_ofstream& rhs);
124 basic_filebuf<char_type, traits_type>* rdbuf() const;
125 bool is_open() const;
126 void open(const char* s, ios_base::openmode mode = ios_base::out);
127 void open(const string& s, ios_base::openmode mode = ios_base::out);
128 void open(const filesystem::path& p,
129 ios_base::openmode mode = ios_base::out); // C++17
134 template <class charT, class traits>
136 swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y);
138 typedef basic_ofstream<char> ofstream;
139 typedef basic_ofstream<wchar_t> wofstream;
141 template <class charT, class traits=char_traits<charT> >
143 : public basic_iostream<charT,traits>
146 typedef charT char_type;
147 typedef traits traits_type;
148 typedef typename traits_type::int_type int_type;
149 typedef typename traits_type::pos_type pos_type;
150 typedef typename traits_type::off_type off_type;
153 explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out);
154 explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out);
155 explicit basic_fstream(const filesystem::path& p,
156 ios_base::openmode mode = ios_base::in|ios_base::out); C++17
157 basic_fstream(basic_fstream&& rhs);
159 basic_fstream& operator=(basic_fstream&& rhs);
160 void swap(basic_fstream& rhs);
162 basic_filebuf<char_type, traits_type>* rdbuf() const;
163 bool is_open() const;
164 void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out);
165 void open(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out);
166 void open(const filesystem::path& s,
167 ios_base::openmode mode = ios_base::in|ios_base::out); // C++17
172 template <class charT, class traits>
173 void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y);
175 typedef basic_fstream<char> fstream;
176 typedef basic_fstream<wchar_t> wfstream;
188 #include <filesystem>
190 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
191 #pragma GCC system_header
195 #include <__undef_macros>
198 _LIBCPP_BEGIN_NAMESPACE_STD
200 template <class _CharT, class _Traits>
201 class _LIBCPP_TEMPLATE_VIS basic_filebuf
202 : public basic_streambuf<_CharT, _Traits>
205 typedef _CharT char_type;
206 typedef _Traits traits_type;
207 typedef typename traits_type::int_type int_type;
208 typedef typename traits_type::pos_type pos_type;
209 typedef typename traits_type::off_type off_type;
210 typedef typename traits_type::state_type state_type;
212 // 27.9.1.2 Constructors/destructor:
214 #ifndef _LIBCPP_CXX03_LANG
215 basic_filebuf(basic_filebuf&& __rhs);
217 virtual ~basic_filebuf();
219 // 27.9.1.3 Assign/swap:
220 #ifndef _LIBCPP_CXX03_LANG
221 _LIBCPP_INLINE_VISIBILITY
222 basic_filebuf& operator=(basic_filebuf&& __rhs);
224 void swap(basic_filebuf& __rhs);
227 _LIBCPP_INLINE_VISIBILITY
228 bool is_open() const;
229 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
230 basic_filebuf* open(const char* __s, ios_base::openmode __mode);
231 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
232 basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode);
234 _LIBCPP_INLINE_VISIBILITY
235 basic_filebuf* open(const string& __s, ios_base::openmode __mode);
237 #if _LIBCPP_STD_VER >= 17
238 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
239 basic_filebuf* open(const _VSTD_FS::path& __p, ios_base::openmode __mode) {
240 return open(__p.c_str(), __mode);
243 _LIBCPP_INLINE_VISIBILITY
244 basic_filebuf* __open(int __fd, ios_base::openmode __mode);
246 basic_filebuf* close();
248 _LIBCPP_INLINE_VISIBILITY
249 inline static const char*
250 __make_mdstring(ios_base::openmode __mode) _NOEXCEPT;
253 // 27.9.1.5 Overridden virtual functions:
254 virtual int_type underflow();
255 virtual int_type pbackfail(int_type __c = traits_type::eof());
256 virtual int_type overflow (int_type __c = traits_type::eof());
257 virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n);
258 virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
259 ios_base::openmode __wch = ios_base::in | ios_base::out);
260 virtual pos_type seekpos(pos_type __sp,
261 ios_base::openmode __wch = ios_base::in | ios_base::out);
263 virtual void imbue(const locale& __loc);
267 const char* __extbufnext_;
268 const char* __extbufend_;
269 char __extbuf_min_[8];
271 char_type* __intbuf_;
274 const codecvt<char_type, char, state_type>* __cv_;
276 state_type __st_last_;
277 ios_base::openmode __om_;
278 ios_base::openmode __cm_;
281 bool __always_noconv_;
287 template <class _CharT, class _Traits>
288 basic_filebuf<_CharT, _Traits>::basic_filebuf()
303 __always_noconv_(false)
305 if (has_facet<codecvt<char_type, char, state_type> >(this->getloc()))
307 __cv_ = &use_facet<codecvt<char_type, char, state_type> >(this->getloc());
308 __always_noconv_ = __cv_->always_noconv();
313 #ifndef _LIBCPP_CXX03_LANG
315 template <class _CharT, class _Traits>
316 basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs)
317 : basic_streambuf<_CharT, _Traits>(__rhs)
319 if (__rhs.__extbuf_ == __rhs.__extbuf_min_)
321 __extbuf_ = __extbuf_min_;
322 __extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_);
323 __extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_);
327 __extbuf_ = __rhs.__extbuf_;
328 __extbufnext_ = __rhs.__extbufnext_;
329 __extbufend_ = __rhs.__extbufend_;
331 __ebs_ = __rhs.__ebs_;
332 __intbuf_ = __rhs.__intbuf_;
333 __ibs_ = __rhs.__ibs_;
334 __file_ = __rhs.__file_;
337 __st_last_ = __rhs.__st_last_;
340 __owns_eb_ = __rhs.__owns_eb_;
341 __owns_ib_ = __rhs.__owns_ib_;
342 __always_noconv_ = __rhs.__always_noconv_;
345 if (__rhs.pbase() == __rhs.__intbuf_)
346 this->setp(__intbuf_, __intbuf_ + (__rhs. epptr() - __rhs.pbase()));
348 this->setp((char_type*)__extbuf_,
349 (char_type*)__extbuf_ + (__rhs. epptr() - __rhs.pbase()));
350 this->__pbump(__rhs. pptr() - __rhs.pbase());
352 else if (__rhs.eback())
354 if (__rhs.eback() == __rhs.__intbuf_)
355 this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()),
356 __intbuf_ + (__rhs.egptr() - __rhs.eback()));
358 this->setg((char_type*)__extbuf_,
359 (char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()),
360 (char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback()));
363 __rhs.__extbufnext_ = 0;
364 __rhs.__extbufend_ = 0;
369 __rhs.__st_ = state_type();
370 __rhs.__st_last_ = state_type();
373 __rhs.__owns_eb_ = false;
374 __rhs.__owns_ib_ = false;
379 template <class _CharT, class _Traits>
381 basic_filebuf<_CharT, _Traits>&
382 basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs)
389 #endif // _LIBCPP_CXX03_LANG
391 template <class _CharT, class _Traits>
392 basic_filebuf<_CharT, _Traits>::~basic_filebuf()
394 #ifndef _LIBCPP_NO_EXCEPTIONS
397 #endif // _LIBCPP_NO_EXCEPTIONS
399 #ifndef _LIBCPP_NO_EXCEPTIONS
404 #endif // _LIBCPP_NO_EXCEPTIONS
411 template <class _CharT, class _Traits>
413 basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs)
415 basic_streambuf<char_type, traits_type>::swap(__rhs);
416 if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_)
418 _VSTD::swap(__extbuf_, __rhs.__extbuf_);
419 _VSTD::swap(__extbufnext_, __rhs.__extbufnext_);
420 _VSTD::swap(__extbufend_, __rhs.__extbufend_);
424 ptrdiff_t __ln = __extbufnext_ - __extbuf_;
425 ptrdiff_t __le = __extbufend_ - __extbuf_;
426 ptrdiff_t __rn = __rhs.__extbufnext_ - __rhs.__extbuf_;
427 ptrdiff_t __re = __rhs.__extbufend_ - __rhs.__extbuf_;
428 if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_)
430 __extbuf_ = __rhs.__extbuf_;
431 __rhs.__extbuf_ = __rhs.__extbuf_min_;
433 else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_)
435 __rhs.__extbuf_ = __extbuf_;
436 __extbuf_ = __extbuf_min_;
438 __extbufnext_ = __extbuf_ + __rn;
439 __extbufend_ = __extbuf_ + __re;
440 __rhs.__extbufnext_ = __rhs.__extbuf_ + __ln;
441 __rhs.__extbufend_ = __rhs.__extbuf_ + __le;
443 _VSTD::swap(__ebs_, __rhs.__ebs_);
444 _VSTD::swap(__intbuf_, __rhs.__intbuf_);
445 _VSTD::swap(__ibs_, __rhs.__ibs_);
446 _VSTD::swap(__file_, __rhs.__file_);
447 _VSTD::swap(__cv_, __rhs.__cv_);
448 _VSTD::swap(__st_, __rhs.__st_);
449 _VSTD::swap(__st_last_, __rhs.__st_last_);
450 _VSTD::swap(__om_, __rhs.__om_);
451 _VSTD::swap(__cm_, __rhs.__cm_);
452 _VSTD::swap(__owns_eb_, __rhs.__owns_eb_);
453 _VSTD::swap(__owns_ib_, __rhs.__owns_ib_);
454 _VSTD::swap(__always_noconv_, __rhs.__always_noconv_);
455 if (this->eback() == (char_type*)__rhs.__extbuf_min_)
457 ptrdiff_t __n = this->gptr() - this->eback();
458 ptrdiff_t __e = this->egptr() - this->eback();
459 this->setg((char_type*)__extbuf_min_,
460 (char_type*)__extbuf_min_ + __n,
461 (char_type*)__extbuf_min_ + __e);
463 else if (this->pbase() == (char_type*)__rhs.__extbuf_min_)
465 ptrdiff_t __n = this->pptr() - this->pbase();
466 ptrdiff_t __e = this->epptr() - this->pbase();
467 this->setp((char_type*)__extbuf_min_,
468 (char_type*)__extbuf_min_ + __e);
471 if (__rhs.eback() == (char_type*)__extbuf_min_)
473 ptrdiff_t __n = __rhs.gptr() - __rhs.eback();
474 ptrdiff_t __e = __rhs.egptr() - __rhs.eback();
475 __rhs.setg((char_type*)__rhs.__extbuf_min_,
476 (char_type*)__rhs.__extbuf_min_ + __n,
477 (char_type*)__rhs.__extbuf_min_ + __e);
479 else if (__rhs.pbase() == (char_type*)__extbuf_min_)
481 ptrdiff_t __n = __rhs.pptr() - __rhs.pbase();
482 ptrdiff_t __e = __rhs.epptr() - __rhs.pbase();
483 __rhs.setp((char_type*)__rhs.__extbuf_min_,
484 (char_type*)__rhs.__extbuf_min_ + __e);
489 template <class _CharT, class _Traits>
490 inline _LIBCPP_INLINE_VISIBILITY
492 swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y)
497 template <class _CharT, class _Traits>
500 basic_filebuf<_CharT, _Traits>::is_open() const
505 template <class _CharT, class _Traits>
506 const char* basic_filebuf<_CharT, _Traits>::__make_mdstring(
507 ios_base::openmode __mode) _NOEXCEPT {
508 switch (__mode & ~ios_base::ate) {
510 case ios_base::out | ios_base::trunc:
512 case ios_base::out | ios_base::app:
517 case ios_base::in | ios_base::out:
519 case ios_base::in | ios_base::out | ios_base::trunc:
521 case ios_base::in | ios_base::out | ios_base::app:
522 case ios_base::in | ios_base::app:
524 case ios_base::out | ios_base::binary:
525 case ios_base::out | ios_base::trunc | ios_base::binary:
527 case ios_base::out | ios_base::app | ios_base::binary:
528 case ios_base::app | ios_base::binary:
530 case ios_base::in | ios_base::binary:
532 case ios_base::in | ios_base::out | ios_base::binary:
534 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
536 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary:
537 case ios_base::in | ios_base::app | ios_base::binary:
542 _LIBCPP_UNREACHABLE();
545 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
546 template <class _CharT, class _Traits>
547 basic_filebuf<_CharT, _Traits>*
548 basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
550 basic_filebuf<_CharT, _Traits>* __rt = 0;
553 if (const char* __mdstr = __make_mdstring(__mode)) {
555 __file_ = fopen(__s, __mdstr);
558 if (__mode & ios_base::ate) {
559 if (fseek(__file_, 0, SEEK_END)) {
572 template <class _CharT, class _Traits>
573 _LIBCPP_INLINE_VISIBILITY basic_filebuf<_CharT, _Traits>*
574 basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) {
575 basic_filebuf<_CharT, _Traits>* __rt = 0;
577 if (const char* __mdstr = __make_mdstring(__mode)) {
579 __file_ = fdopen(__fd, __mdstr);
582 if (__mode & ios_base::ate) {
583 if (fseek(__file_, 0, SEEK_END)) {
596 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
597 // This is basically the same as the char* overload except that it uses _wfopen
598 // and long mode strings.
599 template <class _CharT, class _Traits>
600 basic_filebuf<_CharT, _Traits>*
601 basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
603 basic_filebuf<_CharT, _Traits>* __rt = 0;
607 const wchar_t* __mdstr;
608 switch (__mode & ~ios_base::ate)
611 case ios_base::out | ios_base::trunc:
614 case ios_base::out | ios_base::app:
621 case ios_base::in | ios_base::out:
624 case ios_base::in | ios_base::out | ios_base::trunc:
627 case ios_base::in | ios_base::out | ios_base::app:
628 case ios_base::in | ios_base::app:
631 case ios_base::out | ios_base::binary:
632 case ios_base::out | ios_base::trunc | ios_base::binary:
635 case ios_base::out | ios_base::app | ios_base::binary:
636 case ios_base::app | ios_base::binary:
639 case ios_base::in | ios_base::binary:
642 case ios_base::in | ios_base::out | ios_base::binary:
645 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
648 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary:
649 case ios_base::in | ios_base::app | ios_base::binary:
658 __file_ = _wfopen(__s, __mdstr);
662 if (__mode & ios_base::ate)
664 if (fseek(__file_, 0, SEEK_END))
680 template <class _CharT, class _Traits>
682 basic_filebuf<_CharT, _Traits>*
683 basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
685 return open(__s.c_str(), __mode);
689 template <class _CharT, class _Traits>
690 basic_filebuf<_CharT, _Traits>*
691 basic_filebuf<_CharT, _Traits>::close()
693 basic_filebuf<_CharT, _Traits>* __rt = 0;
697 unique_ptr<FILE, int(*)(FILE*)> __h(__file_, fclose);
700 if (fclose(__h.release()) == 0)
709 template <class _CharT, class _Traits>
710 typename basic_filebuf<_CharT, _Traits>::int_type
711 basic_filebuf<_CharT, _Traits>::underflow()
714 return traits_type::eof();
715 bool __initial = __read_mode();
717 if (this->gptr() == 0)
718 this->setg(&__1buf, &__1buf+1, &__1buf+1);
719 const size_t __unget_sz = __initial ? 0 : min<size_t>((this->egptr() - this->eback()) / 2, 4);
720 int_type __c = traits_type::eof();
721 if (this->gptr() == this->egptr())
723 memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type));
724 if (__always_noconv_)
726 size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz);
727 __nmemb = fread(this->eback() + __unget_sz, 1, __nmemb, __file_);
730 this->setg(this->eback(),
731 this->eback() + __unget_sz,
732 this->eback() + __unget_sz + __nmemb);
733 __c = traits_type::to_int_type(*this->gptr());
738 _LIBCPP_ASSERT ( !(__extbufnext_ == NULL && (__extbufend_ != __extbufnext_)), "underflow moving from NULL" );
739 if (__extbufend_ != __extbufnext_)
740 memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
741 __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_);
742 __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
743 size_t __nmemb = _VSTD::min(static_cast<size_t>(__ibs_ - __unget_sz),
744 static_cast<size_t>(__extbufend_ - __extbufnext_));
745 codecvt_base::result __r;
747 size_t __nr = fread((void*) const_cast<char *>(__extbufnext_), 1, __nmemb, __file_);
753 __extbufend_ = __extbufnext_ + __nr;
755 __r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_,
756 this->eback() + __unget_sz,
757 this->eback() + __ibs_, __inext);
758 if (__r == codecvt_base::noconv)
760 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_,
761 (char_type*)const_cast<char *>(__extbufend_));
762 __c = traits_type::to_int_type(*this->gptr());
764 else if (__inext != this->eback() + __unget_sz)
766 this->setg(this->eback(), this->eback() + __unget_sz, __inext);
767 __c = traits_type::to_int_type(*this->gptr());
773 __c = traits_type::to_int_type(*this->gptr());
774 if (this->eback() == &__1buf)
779 template <class _CharT, class _Traits>
780 typename basic_filebuf<_CharT, _Traits>::int_type
781 basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c)
783 if (__file_ && this->eback() < this->gptr())
785 if (traits_type::eq_int_type(__c, traits_type::eof()))
788 return traits_type::not_eof(__c);
790 if ((__om_ & ios_base::out) ||
791 traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1]))
794 *this->gptr() = traits_type::to_char_type(__c);
798 return traits_type::eof();
801 template <class _CharT, class _Traits>
802 typename basic_filebuf<_CharT, _Traits>::int_type
803 basic_filebuf<_CharT, _Traits>::overflow(int_type __c)
806 return traits_type::eof();
809 char_type* __pb_save = this->pbase();
810 char_type* __epb_save = this->epptr();
811 if (!traits_type::eq_int_type(__c, traits_type::eof()))
813 if (this->pptr() == 0)
814 this->setp(&__1buf, &__1buf+1);
815 *this->pptr() = traits_type::to_char_type(__c);
818 if (this->pptr() != this->pbase())
820 if (__always_noconv_)
822 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase());
823 if (fwrite(this->pbase(), sizeof(char_type), __nmemb, __file_) != __nmemb)
824 return traits_type::eof();
828 char* __extbe = __extbuf_;
829 codecvt_base::result __r;
835 const char_type* __e;
836 __r = __cv_->out(__st_, this->pbase(), this->pptr(), __e,
837 __extbuf_, __extbuf_ + __ebs_, __extbe);
838 if (__e == this->pbase())
839 return traits_type::eof();
840 if (__r == codecvt_base::noconv)
842 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase());
843 if (fwrite(this->pbase(), 1, __nmemb, __file_) != __nmemb)
844 return traits_type::eof();
846 else if (__r == codecvt_base::ok || __r == codecvt_base::partial)
848 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_);
849 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb)
850 return traits_type::eof();
851 if (__r == codecvt_base::partial)
853 this->setp(const_cast<char_type*>(__e), this->pptr());
854 this->__pbump(this->epptr() - this->pbase());
858 return traits_type::eof();
859 } while (__r == codecvt_base::partial);
861 this->setp(__pb_save, __epb_save);
863 return traits_type::not_eof(__c);
866 template <class _CharT, class _Traits>
867 basic_streambuf<_CharT, _Traits>*
868 basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n)
877 if (__ebs_ > sizeof(__extbuf_min_))
879 if (__always_noconv_ && __s)
881 __extbuf_ = (char*)__s;
886 __extbuf_ = new char[__ebs_];
892 __extbuf_ = __extbuf_min_;
893 __ebs_ = sizeof(__extbuf_min_);
896 if (!__always_noconv_)
898 __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_));
899 if (__s && __ibs_ >= sizeof(__extbuf_min_))
906 __intbuf_ = new char_type[__ibs_];
919 template <class _CharT, class _Traits>
920 typename basic_filebuf<_CharT, _Traits>::pos_type
921 basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way,
927 int __width = __cv_->encoding();
928 if (__file_ == 0 || (__width <= 0 && __off != 0) || sync())
929 return pos_type(off_type(-1));
930 // __width > 0 || __off == 0
944 return pos_type(off_type(-1));
946 #if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
947 if (fseek(__file_, __width > 0 ? __width * __off : 0, __whence))
948 return pos_type(off_type(-1));
949 pos_type __r = ftell(__file_);
951 if (fseeko(__file_, __width > 0 ? __width * __off : 0, __whence))
952 return pos_type(off_type(-1));
953 pos_type __r = ftello(__file_);
959 template <class _CharT, class _Traits>
960 typename basic_filebuf<_CharT, _Traits>::pos_type
961 basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode)
963 if (__file_ == 0 || sync())
964 return pos_type(off_type(-1));
965 #if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
966 if (fseek(__file_, __sp, SEEK_SET))
967 return pos_type(off_type(-1));
969 if (fseeko(__file_, __sp, SEEK_SET))
970 return pos_type(off_type(-1));
972 __st_ = __sp.state();
976 template <class _CharT, class _Traits>
978 basic_filebuf<_CharT, _Traits>::sync()
985 if (__cm_ & ios_base::out)
987 if (this->pptr() != this->pbase())
988 if (overflow() == traits_type::eof())
990 codecvt_base::result __r;
994 __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe);
995 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_);
996 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb)
998 } while (__r == codecvt_base::partial);
999 if (__r == codecvt_base::error)
1001 if (fflush(__file_))
1004 else if (__cm_ & ios_base::in)
1007 state_type __state = __st_last_;
1008 bool __update_st = false;
1009 if (__always_noconv_)
1010 __c = this->egptr() - this->gptr();
1013 int __width = __cv_->encoding();
1014 __c = __extbufend_ - __extbufnext_;
1016 __c += __width * (this->egptr() - this->gptr());
1019 if (this->gptr() != this->egptr())
1021 const int __off = __cv_->length(__state, __extbuf_,
1023 this->gptr() - this->eback());
1024 __c += __extbufnext_ - __extbuf_ - __off;
1029 #if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
1030 if (fseek(__file_, -__c, SEEK_CUR))
1033 if (fseeko(__file_, -__c, SEEK_CUR))
1038 __extbufnext_ = __extbufend_ = __extbuf_;
1039 this->setg(0, 0, 0);
1045 template <class _CharT, class _Traits>
1047 basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc)
1050 __cv_ = &use_facet<codecvt<char_type, char, state_type> >(__loc);
1051 bool __old_anc = __always_noconv_;
1052 __always_noconv_ = __cv_->always_noconv();
1053 if (__old_anc != __always_noconv_)
1055 this->setg(0, 0, 0);
1057 // invariant, char_type is char, else we couldn't get here
1058 if (__always_noconv_) // need to dump __intbuf_
1061 delete [] __extbuf_;
1062 __owns_eb_ = __owns_ib_;
1064 __extbuf_ = (char*)__intbuf_;
1069 else // need to obtain an __intbuf_.
1070 { // If __extbuf_ is user-supplied, use it, else new __intbuf_
1071 if (!__owns_eb_ && __extbuf_ != __extbuf_min_)
1074 __intbuf_ = (char_type*)__extbuf_;
1076 __extbuf_ = new char[__ebs_];
1082 __intbuf_ = new char_type[__ibs_];
1089 template <class _CharT, class _Traits>
1091 basic_filebuf<_CharT, _Traits>::__read_mode()
1093 if (!(__cm_ & ios_base::in))
1096 if (__always_noconv_)
1097 this->setg((char_type*)__extbuf_,
1098 (char_type*)__extbuf_ + __ebs_,
1099 (char_type*)__extbuf_ + __ebs_);
1101 this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_);
1102 __cm_ = ios_base::in;
1108 template <class _CharT, class _Traits>
1110 basic_filebuf<_CharT, _Traits>::__write_mode()
1112 if (!(__cm_ & ios_base::out))
1114 this->setg(0, 0, 0);
1115 if (__ebs_ > sizeof(__extbuf_min_))
1117 if (__always_noconv_)
1118 this->setp((char_type*)__extbuf_,
1119 (char_type*)__extbuf_ + (__ebs_ - 1));
1121 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1));
1125 __cm_ = ios_base::out;
1131 template <class _CharT, class _Traits>
1132 class _LIBCPP_TEMPLATE_VIS basic_ifstream
1133 : public basic_istream<_CharT, _Traits>
1136 typedef _CharT char_type;
1137 typedef _Traits traits_type;
1138 typedef typename traits_type::int_type int_type;
1139 typedef typename traits_type::pos_type pos_type;
1140 typedef typename traits_type::off_type off_type;
1142 _LIBCPP_INLINE_VISIBILITY
1144 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1145 _LIBCPP_INLINE_VISIBILITY
1146 explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in);
1147 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1148 _LIBCPP_INLINE_VISIBILITY
1149 explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
1151 _LIBCPP_INLINE_VISIBILITY
1152 explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in);
1153 #if _LIBCPP_STD_VER >= 17
1154 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
1155 explicit basic_ifstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in)
1156 : basic_ifstream(__p.c_str(), __mode) {}
1157 #endif // _LIBCPP_STD_VER >= 17
1159 #ifndef _LIBCPP_CXX03_LANG
1160 _LIBCPP_INLINE_VISIBILITY
1161 basic_ifstream(basic_ifstream&& __rhs);
1163 _LIBCPP_INLINE_VISIBILITY
1164 basic_ifstream& operator=(basic_ifstream&& __rhs);
1166 _LIBCPP_INLINE_VISIBILITY
1167 void swap(basic_ifstream& __rhs);
1169 _LIBCPP_INLINE_VISIBILITY
1170 basic_filebuf<char_type, traits_type>* rdbuf() const;
1171 _LIBCPP_INLINE_VISIBILITY
1172 bool is_open() const;
1173 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1174 void open(const char* __s, ios_base::openmode __mode = ios_base::in);
1175 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1176 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
1178 void open(const string& __s, ios_base::openmode __mode = ios_base::in);
1179 #if _LIBCPP_STD_VER >= 17
1180 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
1181 void open(const filesystem::path& __p,
1182 ios_base::openmode __mode = ios_base::in) {
1183 return open(__p.c_str(), __mode);
1185 #endif // _LIBCPP_STD_VER >= 17
1187 _LIBCPP_INLINE_VISIBILITY
1188 void __open(int __fd, ios_base::openmode __mode);
1190 _LIBCPP_INLINE_VISIBILITY
1194 basic_filebuf<char_type, traits_type> __sb_;
1197 template <class _CharT, class _Traits>
1199 basic_ifstream<_CharT, _Traits>::basic_ifstream()
1200 : basic_istream<char_type, traits_type>(&__sb_)
1204 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1205 template <class _CharT, class _Traits>
1207 basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode)
1208 : basic_istream<char_type, traits_type>(&__sb_)
1210 if (__sb_.open(__s, __mode | ios_base::in) == 0)
1211 this->setstate(ios_base::failbit);
1214 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1215 template <class _CharT, class _Traits>
1217 basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode)
1218 : basic_istream<char_type, traits_type>(&__sb_)
1220 if (__sb_.open(__s, __mode | ios_base::in) == 0)
1221 this->setstate(ios_base::failbit);
1225 template <class _CharT, class _Traits>
1227 basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode)
1228 : basic_istream<char_type, traits_type>(&__sb_)
1230 if (__sb_.open(__s, __mode | ios_base::in) == 0)
1231 this->setstate(ios_base::failbit);
1235 #ifndef _LIBCPP_CXX03_LANG
1237 template <class _CharT, class _Traits>
1239 basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs)
1240 : basic_istream<char_type, traits_type>(_VSTD::move(__rhs)),
1241 __sb_(_VSTD::move(__rhs.__sb_))
1243 this->set_rdbuf(&__sb_);
1246 template <class _CharT, class _Traits>
1248 basic_ifstream<_CharT, _Traits>&
1249 basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs)
1251 basic_istream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
1252 __sb_ = _VSTD::move(__rhs.__sb_);
1256 #endif // _LIBCPP_CXX03_LANG
1258 template <class _CharT, class _Traits>
1261 basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs)
1263 basic_istream<char_type, traits_type>::swap(__rhs);
1264 __sb_.swap(__rhs.__sb_);
1267 template <class _CharT, class _Traits>
1268 inline _LIBCPP_INLINE_VISIBILITY
1270 swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y)
1275 template <class _CharT, class _Traits>
1277 basic_filebuf<_CharT, _Traits>*
1278 basic_ifstream<_CharT, _Traits>::rdbuf() const
1280 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_);
1283 template <class _CharT, class _Traits>
1286 basic_ifstream<_CharT, _Traits>::is_open() const
1288 return __sb_.is_open();
1291 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1292 template <class _CharT, class _Traits>
1294 basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
1296 if (__sb_.open(__s, __mode | ios_base::in))
1299 this->setstate(ios_base::failbit);
1302 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1303 template <class _CharT, class _Traits>
1305 basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
1307 if (__sb_.open(__s, __mode | ios_base::in))
1310 this->setstate(ios_base::failbit);
1314 template <class _CharT, class _Traits>
1316 basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
1318 if (__sb_.open(__s, __mode | ios_base::in))
1321 this->setstate(ios_base::failbit);
1324 template <class _CharT, class _Traits>
1325 void basic_ifstream<_CharT, _Traits>::__open(int __fd,
1326 ios_base::openmode __mode) {
1327 if (__sb_.__open(__fd, __mode | ios_base::in))
1330 this->setstate(ios_base::failbit);
1334 template <class _CharT, class _Traits>
1337 basic_ifstream<_CharT, _Traits>::close()
1339 if (__sb_.close() == 0)
1340 this->setstate(ios_base::failbit);
1345 template <class _CharT, class _Traits>
1346 class _LIBCPP_TEMPLATE_VIS basic_ofstream
1347 : public basic_ostream<_CharT, _Traits>
1350 typedef _CharT char_type;
1351 typedef _Traits traits_type;
1352 typedef typename traits_type::int_type int_type;
1353 typedef typename traits_type::pos_type pos_type;
1354 typedef typename traits_type::off_type off_type;
1356 _LIBCPP_INLINE_VISIBILITY
1358 _LIBCPP_INLINE_VISIBILITY
1359 explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out);
1360 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1361 _LIBCPP_INLINE_VISIBILITY
1362 explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out);
1364 _LIBCPP_INLINE_VISIBILITY
1365 explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out);
1367 #if _LIBCPP_STD_VER >= 17
1368 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
1369 explicit basic_ofstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
1370 : basic_ofstream(__p.c_str(), __mode) {}
1371 #endif // _LIBCPP_STD_VER >= 17
1373 #ifndef _LIBCPP_CXX03_LANG
1374 _LIBCPP_INLINE_VISIBILITY
1375 basic_ofstream(basic_ofstream&& __rhs);
1377 _LIBCPP_INLINE_VISIBILITY
1378 basic_ofstream& operator=(basic_ofstream&& __rhs);
1380 _LIBCPP_INLINE_VISIBILITY
1381 void swap(basic_ofstream& __rhs);
1383 _LIBCPP_INLINE_VISIBILITY
1384 basic_filebuf<char_type, traits_type>* rdbuf() const;
1385 _LIBCPP_INLINE_VISIBILITY
1386 bool is_open() const;
1387 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1388 void open(const char* __s, ios_base::openmode __mode = ios_base::out);
1389 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1390 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out);
1392 void open(const string& __s, ios_base::openmode __mode = ios_base::out);
1394 #if _LIBCPP_STD_VER >= 17
1395 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
1396 void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
1397 { return open(__p.c_str(), __mode); }
1398 #endif // _LIBCPP_STD_VER >= 17
1400 _LIBCPP_INLINE_VISIBILITY
1401 void __open(int __fd, ios_base::openmode __mode);
1403 _LIBCPP_INLINE_VISIBILITY
1407 basic_filebuf<char_type, traits_type> __sb_;
1410 template <class _CharT, class _Traits>
1412 basic_ofstream<_CharT, _Traits>::basic_ofstream()
1413 : basic_ostream<char_type, traits_type>(&__sb_)
1417 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1418 template <class _CharT, class _Traits>
1420 basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode)
1421 : basic_ostream<char_type, traits_type>(&__sb_)
1423 if (__sb_.open(__s, __mode | ios_base::out) == 0)
1424 this->setstate(ios_base::failbit);
1427 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1428 template <class _CharT, class _Traits>
1430 basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode)
1431 : basic_ostream<char_type, traits_type>(&__sb_)
1433 if (__sb_.open(__s, __mode | ios_base::out) == 0)
1434 this->setstate(ios_base::failbit);
1438 template <class _CharT, class _Traits>
1440 basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode)
1441 : basic_ostream<char_type, traits_type>(&__sb_)
1443 if (__sb_.open(__s, __mode | ios_base::out) == 0)
1444 this->setstate(ios_base::failbit);
1448 #ifndef _LIBCPP_CXX03_LANG
1450 template <class _CharT, class _Traits>
1452 basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs)
1453 : basic_ostream<char_type, traits_type>(_VSTD::move(__rhs)),
1454 __sb_(_VSTD::move(__rhs.__sb_))
1456 this->set_rdbuf(&__sb_);
1459 template <class _CharT, class _Traits>
1461 basic_ofstream<_CharT, _Traits>&
1462 basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs)
1464 basic_ostream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
1465 __sb_ = _VSTD::move(__rhs.__sb_);
1469 #endif // _LIBCPP_CXX03_LANG
1471 template <class _CharT, class _Traits>
1474 basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs)
1476 basic_ostream<char_type, traits_type>::swap(__rhs);
1477 __sb_.swap(__rhs.__sb_);
1480 template <class _CharT, class _Traits>
1481 inline _LIBCPP_INLINE_VISIBILITY
1483 swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y)
1488 template <class _CharT, class _Traits>
1490 basic_filebuf<_CharT, _Traits>*
1491 basic_ofstream<_CharT, _Traits>::rdbuf() const
1493 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_);
1496 template <class _CharT, class _Traits>
1499 basic_ofstream<_CharT, _Traits>::is_open() const
1501 return __sb_.is_open();
1504 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1505 template <class _CharT, class _Traits>
1507 basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
1509 if (__sb_.open(__s, __mode | ios_base::out))
1512 this->setstate(ios_base::failbit);
1515 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1516 template <class _CharT, class _Traits>
1518 basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
1520 if (__sb_.open(__s, __mode | ios_base::out))
1523 this->setstate(ios_base::failbit);
1527 template <class _CharT, class _Traits>
1529 basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
1531 if (__sb_.open(__s, __mode | ios_base::out))
1534 this->setstate(ios_base::failbit);
1537 template <class _CharT, class _Traits>
1538 void basic_ofstream<_CharT, _Traits>::__open(int __fd,
1539 ios_base::openmode __mode) {
1540 if (__sb_.__open(__fd, __mode | ios_base::out))
1543 this->setstate(ios_base::failbit);
1547 template <class _CharT, class _Traits>
1550 basic_ofstream<_CharT, _Traits>::close()
1552 if (__sb_.close() == 0)
1553 this->setstate(ios_base::failbit);
1558 template <class _CharT, class _Traits>
1559 class _LIBCPP_TEMPLATE_VIS basic_fstream
1560 : public basic_iostream<_CharT, _Traits>
1563 typedef _CharT char_type;
1564 typedef _Traits traits_type;
1565 typedef typename traits_type::int_type int_type;
1566 typedef typename traits_type::pos_type pos_type;
1567 typedef typename traits_type::off_type off_type;
1569 _LIBCPP_INLINE_VISIBILITY
1571 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1572 _LIBCPP_INLINE_VISIBILITY
1573 explicit basic_fstream(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
1574 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1575 _LIBCPP_INLINE_VISIBILITY
1576 explicit basic_fstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
1578 _LIBCPP_INLINE_VISIBILITY
1579 explicit basic_fstream(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
1581 #if _LIBCPP_STD_VER >= 17
1582 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
1583 explicit basic_fstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out)
1584 : basic_fstream(__p.c_str(), __mode) {}
1585 #endif // _LIBCPP_STD_VER >= 17
1588 #ifndef _LIBCPP_CXX03_LANG
1589 _LIBCPP_INLINE_VISIBILITY
1590 basic_fstream(basic_fstream&& __rhs);
1592 _LIBCPP_INLINE_VISIBILITY
1593 basic_fstream& operator=(basic_fstream&& __rhs);
1595 _LIBCPP_INLINE_VISIBILITY
1596 void swap(basic_fstream& __rhs);
1598 _LIBCPP_INLINE_VISIBILITY
1599 basic_filebuf<char_type, traits_type>* rdbuf() const;
1600 _LIBCPP_INLINE_VISIBILITY
1601 bool is_open() const;
1602 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1603 void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
1604 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1605 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
1607 void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
1609 #if _LIBCPP_STD_VER >= 17
1610 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
1611 void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in|ios_base::out)
1612 { return open(__p.c_str(), __mode); }
1613 #endif // _LIBCPP_STD_VER >= 17
1616 _LIBCPP_INLINE_VISIBILITY
1620 basic_filebuf<char_type, traits_type> __sb_;
1623 template <class _CharT, class _Traits>
1625 basic_fstream<_CharT, _Traits>::basic_fstream()
1626 : basic_iostream<char_type, traits_type>(&__sb_)
1630 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1631 template <class _CharT, class _Traits>
1633 basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode)
1634 : basic_iostream<char_type, traits_type>(&__sb_)
1636 if (__sb_.open(__s, __mode) == 0)
1637 this->setstate(ios_base::failbit);
1640 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1641 template <class _CharT, class _Traits>
1643 basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode)
1644 : basic_iostream<char_type, traits_type>(&__sb_)
1646 if (__sb_.open(__s, __mode) == 0)
1647 this->setstate(ios_base::failbit);
1651 template <class _CharT, class _Traits>
1653 basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode)
1654 : basic_iostream<char_type, traits_type>(&__sb_)
1656 if (__sb_.open(__s, __mode) == 0)
1657 this->setstate(ios_base::failbit);
1661 #ifndef _LIBCPP_CXX03_LANG
1663 template <class _CharT, class _Traits>
1665 basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs)
1666 : basic_iostream<char_type, traits_type>(_VSTD::move(__rhs)),
1667 __sb_(_VSTD::move(__rhs.__sb_))
1669 this->set_rdbuf(&__sb_);
1672 template <class _CharT, class _Traits>
1674 basic_fstream<_CharT, _Traits>&
1675 basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs)
1677 basic_iostream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
1678 __sb_ = _VSTD::move(__rhs.__sb_);
1682 #endif // _LIBCPP_CXX03_LANG
1684 template <class _CharT, class _Traits>
1687 basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs)
1689 basic_iostream<char_type, traits_type>::swap(__rhs);
1690 __sb_.swap(__rhs.__sb_);
1693 template <class _CharT, class _Traits>
1694 inline _LIBCPP_INLINE_VISIBILITY
1696 swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y)
1701 template <class _CharT, class _Traits>
1703 basic_filebuf<_CharT, _Traits>*
1704 basic_fstream<_CharT, _Traits>::rdbuf() const
1706 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_);
1709 template <class _CharT, class _Traits>
1712 basic_fstream<_CharT, _Traits>::is_open() const
1714 return __sb_.is_open();
1717 #ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1718 template <class _CharT, class _Traits>
1720 basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
1722 if (__sb_.open(__s, __mode))
1725 this->setstate(ios_base::failbit);
1728 #ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
1729 template <class _CharT, class _Traits>
1731 basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
1733 if (__sb_.open(__s, __mode))
1736 this->setstate(ios_base::failbit);
1740 template <class _CharT, class _Traits>
1742 basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
1744 if (__sb_.open(__s, __mode))
1747 this->setstate(ios_base::failbit);
1751 template <class _CharT, class _Traits>
1754 basic_fstream<_CharT, _Traits>::close()
1756 if (__sb_.close() == 0)
1757 this->setstate(ios_base::failbit);
1760 _LIBCPP_END_NAMESPACE_STD
1764 #endif // _LIBCPP_FSTREAM