1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_FSTREAM 11#define _LIBCPP_FSTREAM 12 13/* 14 fstream synopsis 15 16template <class charT, class traits = char_traits<charT> > 17class basic_filebuf 18 : public basic_streambuf<charT, traits> 19{ 20public: 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; 26 27 // 27.9.1.2 Constructors/destructor: 28 basic_filebuf(); 29 basic_filebuf(basic_filebuf&& rhs); 30 virtual ~basic_filebuf(); 31 32 // 27.9.1.3 Assign/swap: 33 basic_filebuf& operator=(basic_filebuf&& rhs); 34 void swap(basic_filebuf& rhs); 35 36 // 27.9.1.4 Members: 37 bool is_open() const; 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(); 42 43protected: 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); 55 virtual int sync(); 56 virtual void imbue(const locale& loc); 57}; 58 59template <class charT, class traits> 60 void 61 swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y); 62 63typedef basic_filebuf<char> filebuf; 64typedef basic_filebuf<wchar_t> wfilebuf; 65 66template <class charT, class traits = char_traits<charT> > 67class basic_ifstream 68 : public basic_istream<charT,traits> 69{ 70public: 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; 76 using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 77 78 basic_ifstream(); 79 explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in); 80 explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in); 81 template<class T> 82 explicit basic_ifstream(const T& s, ios_base::openmode mode = ios_base::in); // Since C++17 83 basic_ifstream(basic_ifstream&& rhs); 84 85 basic_ifstream& operator=(basic_ifstream&& rhs); 86 void swap(basic_ifstream& rhs); 87 88 basic_filebuf<char_type, traits_type>* rdbuf() const; 89 native_handle_type native_handle() const noexcept; // Since C++26 90 bool is_open() const; 91 void open(const char* s, ios_base::openmode mode = ios_base::in); 92 void open(const string& s, ios_base::openmode mode = ios_base::in); 93 void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); // C++17 94 95 void close(); 96}; 97 98template <class charT, class traits> 99 void 100 swap(basic_ifstream<charT, traits>& x, basic_ifstream<charT, traits>& y); 101 102typedef basic_ifstream<char> ifstream; 103typedef basic_ifstream<wchar_t> wifstream; 104 105template <class charT, class traits = char_traits<charT> > 106class basic_ofstream 107 : public basic_ostream<charT,traits> 108{ 109public: 110 typedef charT char_type; 111 typedef traits traits_type; 112 typedef typename traits_type::int_type int_type; 113 typedef typename traits_type::pos_type pos_type; 114 typedef typename traits_type::off_type off_type; 115 using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 116 117 basic_ofstream(); 118 explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out); 119 explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out); 120 template<class T> 121 explicit basic_ofstream(const T& s, ios_base::openmode mode = ios_base::out); // Since C++17 122 basic_ofstream(basic_ofstream&& rhs); 123 124 basic_ofstream& operator=(basic_ofstream&& rhs); 125 void swap(basic_ofstream& rhs); 126 127 basic_filebuf<char_type, traits_type>* rdbuf() const; 128 native_handle_type native_handle() const noexcept; // Since C++26 129 130 bool is_open() const; 131 void open(const char* s, ios_base::openmode mode = ios_base::out); 132 void open(const string& s, ios_base::openmode mode = ios_base::out); 133 void open(const filesystem::path& p, 134 ios_base::openmode mode = ios_base::out); // C++17 135 136 void close(); 137}; 138 139template <class charT, class traits> 140 void 141 swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y); 142 143typedef basic_ofstream<char> ofstream; 144typedef basic_ofstream<wchar_t> wofstream; 145 146template <class charT, class traits=char_traits<charT> > 147class basic_fstream 148 : public basic_iostream<charT,traits> 149{ 150public: 151 typedef charT char_type; 152 typedef traits traits_type; 153 typedef typename traits_type::int_type int_type; 154 typedef typename traits_type::pos_type pos_type; 155 typedef typename traits_type::off_type off_type; 156 using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 157 158 basic_fstream(); 159 explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 160 explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); 161 template<class T> 162 explicit basic_fstream(const T& s, ios_base::openmode mode = ios_base::in | ios_base::out); // Since C++17 163 basic_fstream(basic_fstream&& rhs); 164 165 basic_fstream& operator=(basic_fstream&& rhs); 166 void swap(basic_fstream& rhs); 167 168 basic_filebuf<char_type, traits_type>* rdbuf() const; 169 native_handle_type native_handle() const noexcept; // Since C++26 170 bool is_open() const; 171 void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 172 void open(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); 173 void open(const filesystem::path& s, 174 ios_base::openmode mode = ios_base::in|ios_base::out); // C++17 175 176 void close(); 177}; 178 179template <class charT, class traits> 180 void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y); 181 182typedef basic_fstream<char> fstream; 183typedef basic_fstream<wchar_t> wfstream; 184 185} // std 186 187*/ 188 189#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 190# include <__cxx03/fstream> 191#else 192# include <__algorithm/max.h> 193# include <__assert> 194# include <__config> 195# include <__filesystem/path.h> 196# include <__fwd/fstream.h> 197# include <__locale> 198# include <__memory/addressof.h> 199# include <__memory/unique_ptr.h> 200# include <__ostream/basic_ostream.h> 201# include <__type_traits/enable_if.h> 202# include <__type_traits/is_same.h> 203# include <__utility/move.h> 204# include <__utility/swap.h> 205# include <__utility/unreachable.h> 206# include <cstdio> 207# include <istream> 208# include <streambuf> 209# include <typeinfo> 210# include <version> 211 212# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 213# pragma GCC system_header 214# endif 215 216_LIBCPP_PUSH_MACROS 217# include <__undef_macros> 218 219# if _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 220 221_LIBCPP_BEGIN_NAMESPACE_STD 222 223# if _LIBCPP_STD_VER >= 26 && defined(_LIBCPP_WIN32API) 224_LIBCPP_EXPORTED_FROM_ABI void* __filebuf_windows_native_handle(FILE* __file) noexcept; 225# endif 226 227template <class _CharT, class _Traits> 228class _LIBCPP_TEMPLATE_VIS basic_filebuf : public basic_streambuf<_CharT, _Traits> { 229public: 230 typedef _CharT char_type; 231 typedef _Traits traits_type; 232 typedef typename traits_type::int_type int_type; 233 typedef typename traits_type::pos_type pos_type; 234 typedef typename traits_type::off_type off_type; 235 typedef typename traits_type::state_type state_type; 236# if _LIBCPP_STD_VER >= 26 237# if defined(_LIBCPP_WIN32API) 238 using native_handle_type = void*; // HANDLE 239# elif __has_include(<unistd.h>) 240 using native_handle_type = int; // POSIX file descriptor 241# else 242# error "Provide a native file handle!" 243# endif 244# endif 245 246 // 27.9.1.2 Constructors/destructor: 247 basic_filebuf(); 248 basic_filebuf(basic_filebuf&& __rhs); 249 ~basic_filebuf() override; 250 251 // 27.9.1.3 Assign/swap: 252 _LIBCPP_HIDE_FROM_ABI basic_filebuf& operator=(basic_filebuf&& __rhs); 253 void swap(basic_filebuf& __rhs); 254 255 // 27.9.1.4 Members: 256 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 257 basic_filebuf* open(const char* __s, ios_base::openmode __mode); 258# if _LIBCPP_HAS_OPEN_WITH_WCHAR 259 basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode); 260# endif 261 _LIBCPP_HIDE_FROM_ABI basic_filebuf* open(const string& __s, ios_base::openmode __mode); 262 263# if _LIBCPP_STD_VER >= 17 264 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI basic_filebuf* 265 open(const filesystem::path& __p, ios_base::openmode __mode) { 266 return open(__p.c_str(), __mode); 267 } 268# endif 269 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __open(int __fd, ios_base::openmode __mode); 270 basic_filebuf* close(); 271# if _LIBCPP_STD_VER >= 26 272 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { 273 _LIBCPP_ASSERT_UNCATEGORIZED(this->is_open(), "File must be opened"); 274# if defined(_LIBCPP_WIN32API) 275 return std::__filebuf_windows_native_handle(__file_); 276# elif __has_include(<unistd.h>) 277 return fileno(__file_); 278# else 279# error "Provide a way to determine the file native handle!" 280# endif 281 } 282# endif // _LIBCPP_STD_VER >= 26 283 284 _LIBCPP_HIDE_FROM_ABI inline static const char* __make_mdstring(ios_base::openmode __mode) _NOEXCEPT; 285# if _LIBCPP_HAS_OPEN_WITH_WCHAR 286 _LIBCPP_HIDE_FROM_ABI inline static const wchar_t* __make_mdwstring(ios_base::openmode __mode) _NOEXCEPT; 287# endif 288 289protected: 290 // 27.9.1.5 Overridden virtual functions: 291 int_type underflow() override; 292 int_type pbackfail(int_type __c = traits_type::eof()) override; 293 int_type overflow(int_type __c = traits_type::eof()) override; 294 basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n) override; 295 pos_type 296 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 297 pos_type seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 298 int sync() override; 299 void imbue(const locale& __loc) override; 300 301private: 302 char* __extbuf_; 303 const char* __extbufnext_; 304 const char* __extbufend_; 305 char __extbuf_min_[8]; 306 size_t __ebs_; 307 char_type* __intbuf_; 308 size_t __ibs_; 309 FILE* __file_; 310 const codecvt<char_type, char, state_type>* __cv_; 311 state_type __st_; 312 state_type __st_last_; 313 ios_base::openmode __om_; 314 // There have been no file operations yet, which allows setting unbuffered 315 // I/O mode. 316 static const ios_base::openmode __no_io_operations = ios_base::trunc; 317 // Unbuffered I/O mode has been requested. 318 static const ios_base::openmode __use_unbuffered_io = ios_base::ate; 319 // Used to track the currently used mode and track whether the output should 320 // be unbuffered. 321 // [filebuf.virtuals]/12 322 // If setbuf(0, 0) is called on a stream before any I/O has occurred on 323 // that stream, the stream becomes unbuffered. Otherwise the results are 324 // implementation-defined. 325 // This allows calling setbuf(0, 0) 326 // - before opening a file, 327 // - after opening a file, before 328 // - a read 329 // - a write 330 // - a seek. 331 // Note that opening a file with ios_base::ate does a seek operation. 332 // Normally underflow, overflow, and sync change this flag to ios_base::in, 333 // ios_base_out, or 0. 334 // 335 // The ios_base::trunc and ios_base::ate flags are not used in __cm_. They 336 // are used to track the state of the unbuffered request. For readability 337 // they have the aliases __no_io_operations and __use_unbuffered_io 338 // respectively. 339 // 340 // The __no_io_operations and __use_unbuffered_io flags are used in the 341 // following way: 342 // - __no_io_operations is set upon construction to indicate the unbuffered 343 // state can be set. 344 // - When requesting unbuffered output: 345 // - If the file is open it sets the mode. 346 // - Else places a request by adding the __use_unbuffered_io flag. 347 // - When a file is opened it checks whether both __no_io_operations and 348 // __use_unbuffered_io are set. If so switches to unbuffered mode. 349 // - All file I/O operations change the mode effectively clearing the 350 // __no_io_operations and __use_unbuffered_io flags. 351 ios_base::openmode __cm_; 352 bool __owns_eb_; 353 bool __owns_ib_; 354 bool __always_noconv_; 355 356 bool __read_mode(); 357 void __write_mode(); 358 359 _LIBCPP_HIDE_FROM_ABI static int __fseek(FILE* __file, pos_type __offset, int __whence); 360 _LIBCPP_HIDE_FROM_ABI static pos_type __ftell(FILE* __file); 361 362 _LIBCPP_EXPORTED_FROM_ABI friend FILE* __get_ostream_file(ostream&); 363 364 // There are multiple (__)open function, they use different C-API open 365 // function. After that call these functions behave the same. This function 366 // does that part and determines the final return value. 367 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __do_open(FILE* __file, ios_base::openmode __mode) { 368 __file_ = __file; 369 if (!__file_) 370 return nullptr; 371 372 __om_ = __mode; 373 if (__cm_ == (__no_io_operations | __use_unbuffered_io)) { 374 std::setbuf(__file_, nullptr); 375 __cm_ = 0; 376 } 377 378 if (__mode & ios_base::ate) { 379 __cm_ = 0; 380 if (fseek(__file_, 0, SEEK_END)) { 381 fclose(__file_); 382 __file_ = nullptr; 383 return nullptr; 384 } 385 } 386 387 return this; 388 } 389 390 // If the file is already open, switch to unbuffered mode. Otherwise, record 391 // the request to use unbuffered mode so that we use that mode when we 392 // eventually open the file. 393 _LIBCPP_HIDE_FROM_ABI void __request_unbuffered_mode(char_type* __s, streamsize __n) { 394 if (__cm_ == __no_io_operations && __s == nullptr && __n == 0) { 395 if (__file_) { 396 std::setbuf(__file_, nullptr); 397 __cm_ = 0; 398 } else { 399 __cm_ = __no_io_operations | __use_unbuffered_io; 400 } 401 } 402 } 403}; 404 405template <class _CharT, class _Traits> 406basic_filebuf<_CharT, _Traits>::basic_filebuf() 407 : __extbuf_(nullptr), 408 __extbufnext_(nullptr), 409 __extbufend_(nullptr), 410 __ebs_(0), 411 __intbuf_(nullptr), 412 __ibs_(0), 413 __file_(nullptr), 414 __cv_(nullptr), 415 __st_(), 416 __st_last_(), 417 __om_(0), 418 __cm_(__no_io_operations), 419 __owns_eb_(false), 420 __owns_ib_(false), 421 __always_noconv_(false) { 422 if (std::has_facet<codecvt<char_type, char, state_type> >(this->getloc())) { 423 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(this->getloc()); 424 __always_noconv_ = __cv_->always_noconv(); 425 } 426 setbuf(nullptr, 4096); 427} 428 429template <class _CharT, class _Traits> 430basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs) : basic_streambuf<_CharT, _Traits>(__rhs) { 431 if (__rhs.__extbuf_ == __rhs.__extbuf_min_) { 432 __extbuf_ = __extbuf_min_; 433 __extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_); 434 __extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_); 435 } else { 436 __extbuf_ = __rhs.__extbuf_; 437 __extbufnext_ = __rhs.__extbufnext_; 438 __extbufend_ = __rhs.__extbufend_; 439 } 440 __ebs_ = __rhs.__ebs_; 441 __intbuf_ = __rhs.__intbuf_; 442 __ibs_ = __rhs.__ibs_; 443 __file_ = __rhs.__file_; 444 __cv_ = __rhs.__cv_; 445 __st_ = __rhs.__st_; 446 __st_last_ = __rhs.__st_last_; 447 __om_ = __rhs.__om_; 448 __cm_ = __rhs.__cm_; 449 __owns_eb_ = __rhs.__owns_eb_; 450 __owns_ib_ = __rhs.__owns_ib_; 451 __always_noconv_ = __rhs.__always_noconv_; 452 if (__rhs.pbase()) { 453 if (__rhs.pbase() == __rhs.__intbuf_) 454 this->setp(__intbuf_, __intbuf_ + (__rhs.epptr() - __rhs.pbase())); 455 else 456 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__rhs.epptr() - __rhs.pbase())); 457 this->__pbump(__rhs.pptr() - __rhs.pbase()); 458 } else if (__rhs.eback()) { 459 if (__rhs.eback() == __rhs.__intbuf_) 460 this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()), __intbuf_ + (__rhs.egptr() - __rhs.eback())); 461 else 462 this->setg((char_type*)__extbuf_, 463 (char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()), 464 (char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback())); 465 } 466 __rhs.__extbuf_ = nullptr; 467 __rhs.__extbufnext_ = nullptr; 468 __rhs.__extbufend_ = nullptr; 469 __rhs.__ebs_ = 0; 470 __rhs.__intbuf_ = 0; 471 __rhs.__ibs_ = 0; 472 __rhs.__file_ = nullptr; 473 __rhs.__st_ = state_type(); 474 __rhs.__st_last_ = state_type(); 475 __rhs.__om_ = 0; 476 __rhs.__cm_ = 0; 477 __rhs.__owns_eb_ = false; 478 __rhs.__owns_ib_ = false; 479 __rhs.setg(0, 0, 0); 480 __rhs.setp(0, 0); 481} 482 483template <class _CharT, class _Traits> 484inline basic_filebuf<_CharT, _Traits>& basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs) { 485 close(); 486 swap(__rhs); 487 return *this; 488} 489 490template <class _CharT, class _Traits> 491basic_filebuf<_CharT, _Traits>::~basic_filebuf() { 492# if _LIBCPP_HAS_EXCEPTIONS 493 try { 494# endif // _LIBCPP_HAS_EXCEPTIONS 495 close(); 496# if _LIBCPP_HAS_EXCEPTIONS 497 } catch (...) { 498 } 499# endif // _LIBCPP_HAS_EXCEPTIONS 500 if (__owns_eb_) 501 delete[] __extbuf_; 502 if (__owns_ib_) 503 delete[] __intbuf_; 504} 505 506template <class _CharT, class _Traits> 507void basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs) { 508 basic_streambuf<char_type, traits_type>::swap(__rhs); 509 if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { 510 // Neither *this nor __rhs uses the small buffer, so we can simply swap the pointers. 511 std::swap(__extbuf_, __rhs.__extbuf_); 512 std::swap(__extbufnext_, __rhs.__extbufnext_); 513 std::swap(__extbufend_, __rhs.__extbufend_); 514 } else { 515 ptrdiff_t __ln = __extbufnext_ ? __extbufnext_ - __extbuf_ : 0; 516 ptrdiff_t __le = __extbufend_ ? __extbufend_ - __extbuf_ : 0; 517 ptrdiff_t __rn = __rhs.__extbufnext_ ? __rhs.__extbufnext_ - __rhs.__extbuf_ : 0; 518 ptrdiff_t __re = __rhs.__extbufend_ ? __rhs.__extbufend_ - __rhs.__extbuf_ : 0; 519 if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { 520 // *this uses the small buffer, but __rhs doesn't. 521 __extbuf_ = __rhs.__extbuf_; 522 __rhs.__extbuf_ = __rhs.__extbuf_min_; 523 std::memmove(__rhs.__extbuf_min_, __extbuf_min_, sizeof(__extbuf_min_)); 524 } else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_) { 525 // *this doesn't use the small buffer, but __rhs does. 526 __rhs.__extbuf_ = __extbuf_; 527 __extbuf_ = __extbuf_min_; 528 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 529 } else { 530 // Both *this and __rhs use the small buffer. 531 char __tmp[sizeof(__extbuf_min_)]; 532 std::memmove(__tmp, __extbuf_min_, sizeof(__extbuf_min_)); 533 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 534 std::memmove(__rhs.__extbuf_min_, __tmp, sizeof(__extbuf_min_)); 535 } 536 __extbufnext_ = __extbuf_ + __rn; 537 __extbufend_ = __extbuf_ + __re; 538 __rhs.__extbufnext_ = __rhs.__extbuf_ + __ln; 539 __rhs.__extbufend_ = __rhs.__extbuf_ + __le; 540 } 541 std::swap(__ebs_, __rhs.__ebs_); 542 std::swap(__intbuf_, __rhs.__intbuf_); 543 std::swap(__ibs_, __rhs.__ibs_); 544 std::swap(__file_, __rhs.__file_); 545 std::swap(__cv_, __rhs.__cv_); 546 std::swap(__st_, __rhs.__st_); 547 std::swap(__st_last_, __rhs.__st_last_); 548 std::swap(__om_, __rhs.__om_); 549 std::swap(__cm_, __rhs.__cm_); 550 std::swap(__owns_eb_, __rhs.__owns_eb_); 551 std::swap(__owns_ib_, __rhs.__owns_ib_); 552 std::swap(__always_noconv_, __rhs.__always_noconv_); 553 if (this->eback() == (char_type*)__rhs.__extbuf_min_) { 554 ptrdiff_t __n = this->gptr() - this->eback(); 555 ptrdiff_t __e = this->egptr() - this->eback(); 556 this->setg((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __n, (char_type*)__extbuf_min_ + __e); 557 } else if (this->pbase() == (char_type*)__rhs.__extbuf_min_) { 558 ptrdiff_t __n = this->pptr() - this->pbase(); 559 ptrdiff_t __e = this->epptr() - this->pbase(); 560 this->setp((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __e); 561 this->__pbump(__n); 562 } 563 if (__rhs.eback() == (char_type*)__extbuf_min_) { 564 ptrdiff_t __n = __rhs.gptr() - __rhs.eback(); 565 ptrdiff_t __e = __rhs.egptr() - __rhs.eback(); 566 __rhs.setg( 567 (char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __n, (char_type*)__rhs.__extbuf_min_ + __e); 568 } else if (__rhs.pbase() == (char_type*)__extbuf_min_) { 569 ptrdiff_t __n = __rhs.pptr() - __rhs.pbase(); 570 ptrdiff_t __e = __rhs.epptr() - __rhs.pbase(); 571 __rhs.setp((char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __e); 572 __rhs.__pbump(__n); 573 } 574} 575 576template <class _CharT, class _Traits> 577inline _LIBCPP_HIDE_FROM_ABI void swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y) { 578 __x.swap(__y); 579} 580 581template <class _CharT, class _Traits> 582inline bool basic_filebuf<_CharT, _Traits>::is_open() const { 583 return __file_ != nullptr; 584} 585 586template <class _CharT, class _Traits> 587const char* basic_filebuf<_CharT, _Traits>::__make_mdstring(ios_base::openmode __mode) _NOEXCEPT { 588 switch (__mode & ~ios_base::ate) { 589 case ios_base::out: 590 case ios_base::out | ios_base::trunc: 591 return "w" _LIBCPP_FOPEN_CLOEXEC_MODE; 592 case ios_base::out | ios_base::app: 593 case ios_base::app: 594 return "a" _LIBCPP_FOPEN_CLOEXEC_MODE; 595 case ios_base::in: 596 return "r" _LIBCPP_FOPEN_CLOEXEC_MODE; 597 case ios_base::in | ios_base::out: 598 return "r+" _LIBCPP_FOPEN_CLOEXEC_MODE; 599 case ios_base::in | ios_base::out | ios_base::trunc: 600 return "w+" _LIBCPP_FOPEN_CLOEXEC_MODE; 601 case ios_base::in | ios_base::out | ios_base::app: 602 case ios_base::in | ios_base::app: 603 return "a+" _LIBCPP_FOPEN_CLOEXEC_MODE; 604 case ios_base::out | ios_base::binary: 605 case ios_base::out | ios_base::trunc | ios_base::binary: 606 return "wb" _LIBCPP_FOPEN_CLOEXEC_MODE; 607 case ios_base::out | ios_base::app | ios_base::binary: 608 case ios_base::app | ios_base::binary: 609 return "ab" _LIBCPP_FOPEN_CLOEXEC_MODE; 610 case ios_base::in | ios_base::binary: 611 return "rb" _LIBCPP_FOPEN_CLOEXEC_MODE; 612 case ios_base::in | ios_base::out | ios_base::binary: 613 return "r+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 614 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 615 return "w+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 616 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 617 case ios_base::in | ios_base::app | ios_base::binary: 618 return "a+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 619# if _LIBCPP_STD_VER >= 23 620 case ios_base::out | ios_base::noreplace: 621 case ios_base::out | ios_base::trunc | ios_base::noreplace: 622 return "wx" _LIBCPP_FOPEN_CLOEXEC_MODE; 623 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::noreplace: 624 return "w+x" _LIBCPP_FOPEN_CLOEXEC_MODE; 625 case ios_base::out | ios_base::binary | ios_base::noreplace: 626 case ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 627 return "wbx" _LIBCPP_FOPEN_CLOEXEC_MODE; 628 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 629 return "w+bx" _LIBCPP_FOPEN_CLOEXEC_MODE; 630# endif // _LIBCPP_STD_VER >= 23 631 default: 632 return nullptr; 633 } 634 __libcpp_unreachable(); 635} 636 637# if _LIBCPP_HAS_OPEN_WITH_WCHAR 638template <class _CharT, class _Traits> 639const wchar_t* basic_filebuf<_CharT, _Traits>::__make_mdwstring(ios_base::openmode __mode) _NOEXCEPT { 640 switch (__mode & ~ios_base::ate) { 641 case ios_base::out: 642 case ios_base::out | ios_base::trunc: 643 return L"w"; 644 case ios_base::out | ios_base::app: 645 case ios_base::app: 646 return L"a"; 647 case ios_base::in: 648 return L"r"; 649 case ios_base::in | ios_base::out: 650 return L"r+"; 651 case ios_base::in | ios_base::out | ios_base::trunc: 652 return L"w+"; 653 case ios_base::in | ios_base::out | ios_base::app: 654 case ios_base::in | ios_base::app: 655 return L"a+"; 656 case ios_base::out | ios_base::binary: 657 case ios_base::out | ios_base::trunc | ios_base::binary: 658 return L"wb"; 659 case ios_base::out | ios_base::app | ios_base::binary: 660 case ios_base::app | ios_base::binary: 661 return L"ab"; 662 case ios_base::in | ios_base::binary: 663 return L"rb"; 664 case ios_base::in | ios_base::out | ios_base::binary: 665 return L"r+b"; 666 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 667 return L"w+b"; 668 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 669 case ios_base::in | ios_base::app | ios_base::binary: 670 return L"a+b"; 671# if _LIBCPP_STD_VER >= 23 672 case ios_base::out | ios_base::noreplace: 673 case ios_base::out | ios_base::trunc | ios_base::noreplace: 674 return L"wx"; 675 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::noreplace: 676 return L"w+x"; 677 case ios_base::out | ios_base::binary | ios_base::noreplace: 678 case ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 679 return L"wbx"; 680 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 681 return L"w+bx"; 682# endif // _LIBCPP_STD_VER >= 23 683 default: 684 return nullptr; 685 } 686 __libcpp_unreachable(); 687} 688# endif 689 690template <class _CharT, class _Traits> 691basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 692 if (__file_) 693 return nullptr; 694 const char* __mdstr = __make_mdstring(__mode); 695 if (!__mdstr) 696 return nullptr; 697 698 return __do_open(fopen(__s, __mdstr), __mode); 699} 700 701template <class _CharT, class _Traits> 702inline basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 703 if (__file_) 704 return nullptr; 705 const char* __mdstr = __make_mdstring(__mode); 706 if (!__mdstr) 707 return nullptr; 708 709 return __do_open(fdopen(__fd, __mdstr), __mode); 710} 711 712# if _LIBCPP_HAS_OPEN_WITH_WCHAR 713// This is basically the same as the char* overload except that it uses _wfopen 714// and long mode strings. 715template <class _CharT, class _Traits> 716basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 717 if (__file_) 718 return nullptr; 719 const wchar_t* __mdstr = __make_mdwstring(__mode); 720 if (!__mdstr) 721 return nullptr; 722 723 return __do_open(_wfopen(__s, __mdstr), __mode); 724} 725# endif 726 727template <class _CharT, class _Traits> 728inline basic_filebuf<_CharT, _Traits>* 729basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 730 return open(__s.c_str(), __mode); 731} 732 733template <class _CharT, class _Traits> 734basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::close() { 735 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 736 if (__file_) { 737 __rt = this; 738 unique_ptr<FILE, int (*)(FILE*)> __h(__file_, fclose); 739 if (sync()) 740 __rt = nullptr; 741 if (fclose(__h.release())) 742 __rt = nullptr; 743 __file_ = nullptr; 744 setbuf(0, 0); 745 } 746 return __rt; 747} 748 749template <class _CharT, class _Traits> 750typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::underflow() { 751 if (__file_ == nullptr) 752 return traits_type::eof(); 753 bool __initial = __read_mode(); 754 char_type __1buf; 755 if (this->gptr() == nullptr) 756 this->setg(&__1buf, &__1buf + 1, &__1buf + 1); 757 const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4); 758 int_type __c = traits_type::eof(); 759 if (this->gptr() == this->egptr()) { 760 std::memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type)); 761 if (__always_noconv_) { 762 size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz); 763 __nmemb = ::fread(this->eback() + __unget_sz, 1, __nmemb, __file_); 764 if (__nmemb != 0) { 765 this->setg(this->eback(), this->eback() + __unget_sz, this->eback() + __unget_sz + __nmemb); 766 __c = traits_type::to_int_type(*this->gptr()); 767 } 768 } else { 769 if (__extbufend_ != __extbufnext_) { 770 _LIBCPP_ASSERT_NON_NULL(__extbufnext_ != nullptr, "underflow moving from nullptr"); 771 _LIBCPP_ASSERT_NON_NULL(__extbuf_ != nullptr, "underflow moving into nullptr"); 772 std::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_); 773 } 774 __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_); 775 __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_); 776 size_t __nmemb = 777 std::min(static_cast<size_t>(__ibs_ - __unget_sz), static_cast<size_t>(__extbufend_ - __extbufnext_)); 778 codecvt_base::result __r; 779 __st_last_ = __st_; 780 size_t __nr = fread((void*)const_cast<char*>(__extbufnext_), 1, __nmemb, __file_); 781 if (__nr != 0) { 782 if (!__cv_) 783 __throw_bad_cast(); 784 785 __extbufend_ = __extbufnext_ + __nr; 786 char_type* __inext; 787 __r = __cv_->in( 788 __st_, __extbuf_, __extbufend_, __extbufnext_, this->eback() + __unget_sz, this->eback() + __ibs_, __inext); 789 if (__r == codecvt_base::noconv) { 790 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)const_cast<char*>(__extbufend_)); 791 __c = traits_type::to_int_type(*this->gptr()); 792 } else if (__inext != this->eback() + __unget_sz) { 793 this->setg(this->eback(), this->eback() + __unget_sz, __inext); 794 __c = traits_type::to_int_type(*this->gptr()); 795 } 796 } 797 } 798 } else 799 __c = traits_type::to_int_type(*this->gptr()); 800 if (this->eback() == &__1buf) 801 this->setg(nullptr, nullptr, nullptr); 802 return __c; 803} 804 805template <class _CharT, class _Traits> 806typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c) { 807 if (__file_ && this->eback() < this->gptr()) { 808 if (traits_type::eq_int_type(__c, traits_type::eof())) { 809 this->gbump(-1); 810 return traits_type::not_eof(__c); 811 } 812 if ((__om_ & ios_base::out) || traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) { 813 this->gbump(-1); 814 *this->gptr() = traits_type::to_char_type(__c); 815 return __c; 816 } 817 } 818 return traits_type::eof(); 819} 820 821template <class _CharT, class _Traits> 822typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::overflow(int_type __c) { 823 if (__file_ == nullptr) 824 return traits_type::eof(); 825 __write_mode(); 826 char_type __1buf; 827 char_type* __pb_save = this->pbase(); 828 char_type* __epb_save = this->epptr(); 829 if (!traits_type::eq_int_type(__c, traits_type::eof())) { 830 if (this->pptr() == nullptr) 831 this->setp(&__1buf, &__1buf + 1); 832 *this->pptr() = traits_type::to_char_type(__c); 833 this->pbump(1); 834 } 835 if (this->pptr() != this->pbase()) { 836 if (__always_noconv_) { 837 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase()); 838 if (std::fwrite(this->pbase(), sizeof(char_type), __nmemb, __file_) != __nmemb) 839 return traits_type::eof(); 840 } else { 841 char* __extbe = __extbuf_; 842 codecvt_base::result __r; 843 do { 844 if (!__cv_) 845 __throw_bad_cast(); 846 847 const char_type* __e; 848 __r = __cv_->out(__st_, this->pbase(), this->pptr(), __e, __extbuf_, __extbuf_ + __ebs_, __extbe); 849 if (__e == this->pbase()) 850 return traits_type::eof(); 851 if (__r == codecvt_base::noconv) { 852 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase()); 853 if (std::fwrite(this->pbase(), 1, __nmemb, __file_) != __nmemb) 854 return traits_type::eof(); 855 } else if (__r == codecvt_base::ok || __r == codecvt_base::partial) { 856 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 857 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 858 return traits_type::eof(); 859 if (__r == codecvt_base::partial) { 860 this->setp(const_cast<char_type*>(__e), this->pptr()); 861 this->__pbump(this->epptr() - this->pbase()); 862 } 863 } else 864 return traits_type::eof(); 865 } while (__r == codecvt_base::partial); 866 } 867 this->setp(__pb_save, __epb_save); 868 } 869 return traits_type::not_eof(__c); 870} 871 872template <class _CharT, class _Traits> 873basic_streambuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n) { 874 this->setg(nullptr, nullptr, nullptr); 875 this->setp(nullptr, nullptr); 876 __request_unbuffered_mode(__s, __n); 877 if (__owns_eb_) 878 delete[] __extbuf_; 879 if (__owns_ib_) 880 delete[] __intbuf_; 881 __ebs_ = __n; 882 if (__ebs_ > sizeof(__extbuf_min_)) { 883 if (__always_noconv_ && __s) { 884 __extbuf_ = (char*)__s; 885 __owns_eb_ = false; 886 } else { 887 __extbuf_ = new char[__ebs_]; 888 __owns_eb_ = true; 889 } 890 } else { 891 __extbuf_ = __extbuf_min_; 892 __ebs_ = sizeof(__extbuf_min_); 893 __owns_eb_ = false; 894 } 895 if (!__always_noconv_) { 896 __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_)); 897 if (__s && __ibs_ > sizeof(__extbuf_min_)) { 898 __intbuf_ = __s; 899 __owns_ib_ = false; 900 } else { 901 __intbuf_ = new char_type[__ibs_]; 902 __owns_ib_ = true; 903 } 904 } else { 905 __ibs_ = 0; 906 __intbuf_ = nullptr; 907 __owns_ib_ = false; 908 } 909 return this; 910} 911 912template <class _CharT, class _Traits> 913typename basic_filebuf<_CharT, _Traits>::pos_type 914basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode) { 915 if (!__cv_) 916 __throw_bad_cast(); 917 918 int __width = __cv_->encoding(); 919 if (__file_ == nullptr || (__width <= 0 && __off != 0) || sync()) 920 return pos_type(off_type(-1)); 921 // __width > 0 || __off == 0 922 int __whence; 923 switch (__way) { 924 case ios_base::beg: 925 __whence = SEEK_SET; 926 break; 927 case ios_base::cur: 928 __whence = SEEK_CUR; 929 break; 930 case ios_base::end: 931 __whence = SEEK_END; 932 break; 933 default: 934 return pos_type(off_type(-1)); 935 } 936 if (__fseek(__file_, __width > 0 ? __width * __off : 0, __whence)) 937 return pos_type(off_type(-1)); 938 pos_type __r = __ftell(__file_); 939 __r.state(__st_); 940 return __r; 941} 942 943template <class _CharT, class _Traits> 944int basic_filebuf<_CharT, _Traits>::__fseek(FILE* __file, pos_type __offset, int __whence) { 945# if defined(_LIBCPP_MSVCRT_LIKE) 946 return _fseeki64(__file, __offset, __whence); 947# elif defined(_NEWLIB_VERSION) 948 return fseek(__file, __offset, __whence); 949# else 950 return ::fseeko(__file, __offset, __whence); 951# endif 952} 953 954template <class _CharT, class _Traits> 955typename basic_filebuf<_CharT, _Traits>::pos_type basic_filebuf<_CharT, _Traits>::__ftell(FILE* __file) { 956# if defined(_LIBCPP_MSVCRT_LIKE) 957 return _ftelli64(__file); 958# elif defined(_NEWLIB_VERSION) 959 return ftell(__file); 960# else 961 return ftello(__file); 962# endif 963} 964 965template <class _CharT, class _Traits> 966typename basic_filebuf<_CharT, _Traits>::pos_type 967basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode) { 968 if (__file_ == nullptr || sync()) 969 return pos_type(off_type(-1)); 970 if (__fseek(__file_, __sp, SEEK_SET)) 971 return pos_type(off_type(-1)); 972 __st_ = __sp.state(); 973 return __sp; 974} 975 976template <class _CharT, class _Traits> 977int basic_filebuf<_CharT, _Traits>::sync() { 978 if (__file_ == nullptr) 979 return 0; 980 if (!__cv_) 981 __throw_bad_cast(); 982 983 if (__cm_ & ios_base::out) { 984 if (this->pptr() != this->pbase()) 985 if (overflow() == traits_type::eof()) 986 return -1; 987 codecvt_base::result __r; 988 do { 989 char* __extbe; 990 __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe); 991 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 992 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 993 return -1; 994 } while (__r == codecvt_base::partial); 995 if (__r == codecvt_base::error) 996 return -1; 997 if (fflush(__file_)) 998 return -1; 999 } else if (__cm_ & ios_base::in) { 1000 off_type __c; 1001 state_type __state = __st_last_; 1002 bool __update_st = false; 1003 if (__always_noconv_) 1004 __c = this->egptr() - this->gptr(); 1005 else { 1006 int __width = __cv_->encoding(); 1007 __c = __extbufend_ - __extbufnext_; 1008 if (__width > 0) 1009 __c += __width * (this->egptr() - this->gptr()); 1010 else { 1011 if (this->gptr() != this->egptr()) { 1012 const int __off = __cv_->length(__state, __extbuf_, __extbufnext_, this->gptr() - this->eback()); 1013 __c += __extbufnext_ - __extbuf_ - __off; 1014 __update_st = true; 1015 } 1016 } 1017 } 1018 if (__fseek(__file_, -__c, SEEK_CUR)) 1019 return -1; 1020 if (__update_st) 1021 __st_ = __state; 1022 __extbufnext_ = __extbufend_ = __extbuf_; 1023 this->setg(nullptr, nullptr, nullptr); 1024 __cm_ = 0; 1025 } 1026 return 0; 1027} 1028 1029template <class _CharT, class _Traits> 1030void basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc) { 1031 sync(); 1032 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(__loc); 1033 bool __old_anc = __always_noconv_; 1034 __always_noconv_ = __cv_->always_noconv(); 1035 if (__old_anc != __always_noconv_) { 1036 this->setg(nullptr, nullptr, nullptr); 1037 this->setp(nullptr, nullptr); 1038 // invariant, char_type is char, else we couldn't get here 1039 if (__always_noconv_) // need to dump __intbuf_ 1040 { 1041 if (__owns_eb_) 1042 delete[] __extbuf_; 1043 __owns_eb_ = __owns_ib_; 1044 __ebs_ = __ibs_; 1045 __extbuf_ = (char*)__intbuf_; 1046 __ibs_ = 0; 1047 __intbuf_ = nullptr; 1048 __owns_ib_ = false; 1049 } else // need to obtain an __intbuf_. 1050 { // If __extbuf_ is user-supplied, use it, else new __intbuf_ 1051 if (!__owns_eb_ && __extbuf_ != __extbuf_min_) { 1052 __ibs_ = __ebs_; 1053 __intbuf_ = (char_type*)__extbuf_; 1054 __owns_ib_ = false; 1055 __extbuf_ = new char[__ebs_]; 1056 __owns_eb_ = true; 1057 } else { 1058 __ibs_ = __ebs_; 1059 __intbuf_ = new char_type[__ibs_]; 1060 __owns_ib_ = true; 1061 } 1062 } 1063 } 1064} 1065 1066template <class _CharT, class _Traits> 1067bool basic_filebuf<_CharT, _Traits>::__read_mode() { 1068 if (!(__cm_ & ios_base::in)) { 1069 this->setp(nullptr, nullptr); 1070 if (__always_noconv_) 1071 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_ + __ebs_, (char_type*)__extbuf_ + __ebs_); 1072 else 1073 this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_); 1074 __cm_ = ios_base::in; 1075 return true; 1076 } 1077 return false; 1078} 1079 1080template <class _CharT, class _Traits> 1081void basic_filebuf<_CharT, _Traits>::__write_mode() { 1082 if (!(__cm_ & ios_base::out)) { 1083 this->setg(nullptr, nullptr, nullptr); 1084 if (__ebs_ > sizeof(__extbuf_min_)) { 1085 if (__always_noconv_) 1086 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__ebs_ - 1)); 1087 else 1088 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1)); 1089 } else 1090 this->setp(nullptr, nullptr); 1091 __cm_ = ios_base::out; 1092 } 1093} 1094 1095// basic_ifstream 1096 1097template <class _CharT, class _Traits> 1098class _LIBCPP_TEMPLATE_VIS basic_ifstream : public basic_istream<_CharT, _Traits> { 1099public: 1100 typedef _CharT char_type; 1101 typedef _Traits traits_type; 1102 typedef typename traits_type::int_type int_type; 1103 typedef typename traits_type::pos_type pos_type; 1104 typedef typename traits_type::off_type off_type; 1105# if _LIBCPP_STD_VER >= 26 1106 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1107# endif 1108 1109 _LIBCPP_HIDE_FROM_ABI basic_ifstream(); 1110 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in); 1111# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1112 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1113# endif 1114 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in); 1115# if _LIBCPP_STD_VER >= 17 1116 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1117 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY 1118 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const _Tp& __p, ios_base::openmode __mode = ios_base::in) 1119 : basic_ifstream(__p.c_str(), __mode) {} 1120# endif // _LIBCPP_STD_VER >= 17 1121 _LIBCPP_HIDE_FROM_ABI basic_ifstream(basic_ifstream&& __rhs); 1122 _LIBCPP_HIDE_FROM_ABI basic_ifstream& operator=(basic_ifstream&& __rhs); 1123 _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream& __rhs); 1124 1125 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1126# if _LIBCPP_STD_VER >= 26 1127 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1128# endif 1129 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1130 void open(const char* __s, ios_base::openmode __mode = ios_base::in); 1131# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1132 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1133# endif 1134 void open(const string& __s, ios_base::openmode __mode = ios_base::in); 1135# if _LIBCPP_STD_VER >= 17 1136 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1137 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in) { 1138 return open(__p.c_str(), __mode); 1139 } 1140# endif // _LIBCPP_STD_VER >= 17 1141 1142 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1143 _LIBCPP_HIDE_FROM_ABI void close(); 1144 1145private: 1146 basic_filebuf<char_type, traits_type> __sb_; 1147}; 1148 1149template <class _CharT, class _Traits> 1150inline basic_ifstream<_CharT, _Traits>::basic_ifstream() 1151 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) {} 1152 1153template <class _CharT, class _Traits> 1154inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode) 1155 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1156 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1157 this->setstate(ios_base::failbit); 1158} 1159 1160# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1161template <class _CharT, class _Traits> 1162inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode) 1163 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1164 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1165 this->setstate(ios_base::failbit); 1166} 1167# endif 1168 1169// extension 1170template <class _CharT, class _Traits> 1171inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode) 1172 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1173 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1174 this->setstate(ios_base::failbit); 1175} 1176 1177template <class _CharT, class _Traits> 1178inline basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs) 1179 : basic_istream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1180 this->set_rdbuf(std::addressof(__sb_)); 1181} 1182 1183template <class _CharT, class _Traits> 1184inline basic_ifstream<_CharT, _Traits>& basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs) { 1185 basic_istream<char_type, traits_type>::operator=(std::move(__rhs)); 1186 __sb_ = std::move(__rhs.__sb_); 1187 return *this; 1188} 1189 1190template <class _CharT, class _Traits> 1191inline void basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs) { 1192 basic_istream<char_type, traits_type>::swap(__rhs); 1193 __sb_.swap(__rhs.__sb_); 1194} 1195 1196template <class _CharT, class _Traits> 1197inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y) { 1198 __x.swap(__y); 1199} 1200 1201template <class _CharT, class _Traits> 1202inline basic_filebuf<_CharT, _Traits>* basic_ifstream<_CharT, _Traits>::rdbuf() const { 1203 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1204} 1205 1206template <class _CharT, class _Traits> 1207inline bool basic_ifstream<_CharT, _Traits>::is_open() const { 1208 return __sb_.is_open(); 1209} 1210 1211template <class _CharT, class _Traits> 1212void basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1213 if (__sb_.open(__s, __mode | ios_base::in)) 1214 this->clear(); 1215 else 1216 this->setstate(ios_base::failbit); 1217} 1218 1219# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1220template <class _CharT, class _Traits> 1221void basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1222 if (__sb_.open(__s, __mode | ios_base::in)) 1223 this->clear(); 1224 else 1225 this->setstate(ios_base::failbit); 1226} 1227# endif 1228 1229template <class _CharT, class _Traits> 1230void basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1231 if (__sb_.open(__s, __mode | ios_base::in)) 1232 this->clear(); 1233 else 1234 this->setstate(ios_base::failbit); 1235} 1236 1237template <class _CharT, class _Traits> 1238inline void basic_ifstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1239 if (__sb_.__open(__fd, __mode | ios_base::in)) 1240 this->clear(); 1241 else 1242 this->setstate(ios_base::failbit); 1243} 1244 1245template <class _CharT, class _Traits> 1246inline void basic_ifstream<_CharT, _Traits>::close() { 1247 if (__sb_.close() == 0) 1248 this->setstate(ios_base::failbit); 1249} 1250 1251// basic_ofstream 1252 1253template <class _CharT, class _Traits> 1254class _LIBCPP_TEMPLATE_VIS basic_ofstream : public basic_ostream<_CharT, _Traits> { 1255public: 1256 typedef _CharT char_type; 1257 typedef _Traits traits_type; 1258 typedef typename traits_type::int_type int_type; 1259 typedef typename traits_type::pos_type pos_type; 1260 typedef typename traits_type::off_type off_type; 1261# if _LIBCPP_STD_VER >= 26 1262 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1263# endif 1264 1265 _LIBCPP_HIDE_FROM_ABI basic_ofstream(); 1266 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out); 1267# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1268 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1269# endif 1270 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out); 1271 1272# if _LIBCPP_STD_VER >= 17 1273 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1274 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY 1275 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const _Tp& __p, ios_base::openmode __mode = ios_base::out) 1276 : basic_ofstream(__p.c_str(), __mode) {} 1277# endif // _LIBCPP_STD_VER >= 17 1278 1279 _LIBCPP_HIDE_FROM_ABI basic_ofstream(basic_ofstream&& __rhs); 1280 _LIBCPP_HIDE_FROM_ABI basic_ofstream& operator=(basic_ofstream&& __rhs); 1281 _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream& __rhs); 1282 1283 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1284# if _LIBCPP_STD_VER >= 26 1285 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1286# endif 1287 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1288 void open(const char* __s, ios_base::openmode __mode = ios_base::out); 1289# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1290 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1291# endif 1292 void open(const string& __s, ios_base::openmode __mode = ios_base::out); 1293 1294# if _LIBCPP_STD_VER >= 17 1295 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1296 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out) { 1297 return open(__p.c_str(), __mode); 1298 } 1299# endif // _LIBCPP_STD_VER >= 17 1300 1301 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1302 _LIBCPP_HIDE_FROM_ABI void close(); 1303 1304private: 1305 basic_filebuf<char_type, traits_type> __sb_; 1306}; 1307 1308template <class _CharT, class _Traits> 1309inline basic_ofstream<_CharT, _Traits>::basic_ofstream() 1310 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) {} 1311 1312template <class _CharT, class _Traits> 1313inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode) 1314 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1315 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1316 this->setstate(ios_base::failbit); 1317} 1318 1319# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1320template <class _CharT, class _Traits> 1321inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode) 1322 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1323 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1324 this->setstate(ios_base::failbit); 1325} 1326# endif 1327 1328// extension 1329template <class _CharT, class _Traits> 1330inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode) 1331 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1332 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1333 this->setstate(ios_base::failbit); 1334} 1335 1336template <class _CharT, class _Traits> 1337inline basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs) 1338 : basic_ostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1339 this->set_rdbuf(std::addressof(__sb_)); 1340} 1341 1342template <class _CharT, class _Traits> 1343inline basic_ofstream<_CharT, _Traits>& basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs) { 1344 basic_ostream<char_type, traits_type>::operator=(std::move(__rhs)); 1345 __sb_ = std::move(__rhs.__sb_); 1346 return *this; 1347} 1348 1349template <class _CharT, class _Traits> 1350inline void basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs) { 1351 basic_ostream<char_type, traits_type>::swap(__rhs); 1352 __sb_.swap(__rhs.__sb_); 1353} 1354 1355template <class _CharT, class _Traits> 1356inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y) { 1357 __x.swap(__y); 1358} 1359 1360template <class _CharT, class _Traits> 1361inline basic_filebuf<_CharT, _Traits>* basic_ofstream<_CharT, _Traits>::rdbuf() const { 1362 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1363} 1364 1365template <class _CharT, class _Traits> 1366inline bool basic_ofstream<_CharT, _Traits>::is_open() const { 1367 return __sb_.is_open(); 1368} 1369 1370template <class _CharT, class _Traits> 1371void basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1372 if (__sb_.open(__s, __mode | ios_base::out)) 1373 this->clear(); 1374 else 1375 this->setstate(ios_base::failbit); 1376} 1377 1378# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1379template <class _CharT, class _Traits> 1380void basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1381 if (__sb_.open(__s, __mode | ios_base::out)) 1382 this->clear(); 1383 else 1384 this->setstate(ios_base::failbit); 1385} 1386# endif 1387 1388template <class _CharT, class _Traits> 1389void basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1390 if (__sb_.open(__s, __mode | ios_base::out)) 1391 this->clear(); 1392 else 1393 this->setstate(ios_base::failbit); 1394} 1395 1396template <class _CharT, class _Traits> 1397inline void basic_ofstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1398 if (__sb_.__open(__fd, __mode | ios_base::out)) 1399 this->clear(); 1400 else 1401 this->setstate(ios_base::failbit); 1402} 1403 1404template <class _CharT, class _Traits> 1405inline void basic_ofstream<_CharT, _Traits>::close() { 1406 if (__sb_.close() == nullptr) 1407 this->setstate(ios_base::failbit); 1408} 1409 1410// basic_fstream 1411 1412template <class _CharT, class _Traits> 1413class _LIBCPP_TEMPLATE_VIS basic_fstream : public basic_iostream<_CharT, _Traits> { 1414public: 1415 typedef _CharT char_type; 1416 typedef _Traits traits_type; 1417 typedef typename traits_type::int_type int_type; 1418 typedef typename traits_type::pos_type pos_type; 1419 typedef typename traits_type::off_type off_type; 1420# if _LIBCPP_STD_VER >= 26 1421 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1422# endif 1423 1424 _LIBCPP_HIDE_FROM_ABI basic_fstream(); 1425 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const char* __s, 1426 ios_base::openmode __mode = ios_base::in | ios_base::out); 1427# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1428 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const wchar_t* __s, 1429 ios_base::openmode __mode = ios_base::in | ios_base::out); 1430# endif 1431 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const string& __s, 1432 ios_base::openmode __mode = ios_base::in | ios_base::out); 1433 1434# if _LIBCPP_STD_VER >= 17 1435 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1436 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI explicit basic_fstream( 1437 const _Tp& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) 1438 : basic_fstream(__p.c_str(), __mode) {} 1439# endif // _LIBCPP_STD_VER >= 17 1440 1441 _LIBCPP_HIDE_FROM_ABI basic_fstream(basic_fstream&& __rhs); 1442 1443 _LIBCPP_HIDE_FROM_ABI basic_fstream& operator=(basic_fstream&& __rhs); 1444 1445 _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream& __rhs); 1446 1447 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1448# if _LIBCPP_STD_VER >= 26 1449 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1450# endif 1451 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1452 _LIBCPP_HIDE_FROM_ABI void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1453# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1454 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1455# endif 1456 _LIBCPP_HIDE_FROM_ABI void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1457 1458# if _LIBCPP_STD_VER >= 17 1459 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1460 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) { 1461 return open(__p.c_str(), __mode); 1462 } 1463# endif // _LIBCPP_STD_VER >= 17 1464 1465 _LIBCPP_HIDE_FROM_ABI void close(); 1466 1467private: 1468 basic_filebuf<char_type, traits_type> __sb_; 1469}; 1470 1471template <class _CharT, class _Traits> 1472inline basic_fstream<_CharT, _Traits>::basic_fstream() 1473 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) {} 1474 1475template <class _CharT, class _Traits> 1476inline basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode) 1477 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1478 if (__sb_.open(__s, __mode) == nullptr) 1479 this->setstate(ios_base::failbit); 1480} 1481 1482# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1483template <class _CharT, class _Traits> 1484inline basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode) 1485 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1486 if (__sb_.open(__s, __mode) == nullptr) 1487 this->setstate(ios_base::failbit); 1488} 1489# endif 1490 1491template <class _CharT, class _Traits> 1492inline basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode) 1493 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1494 if (__sb_.open(__s, __mode) == nullptr) 1495 this->setstate(ios_base::failbit); 1496} 1497 1498// extension 1499template <class _CharT, class _Traits> 1500inline basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs) 1501 : basic_iostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1502 this->set_rdbuf(std::addressof(__sb_)); 1503} 1504 1505template <class _CharT, class _Traits> 1506inline basic_fstream<_CharT, _Traits>& basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs) { 1507 basic_iostream<char_type, traits_type>::operator=(std::move(__rhs)); 1508 __sb_ = std::move(__rhs.__sb_); 1509 return *this; 1510} 1511 1512template <class _CharT, class _Traits> 1513inline void basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs) { 1514 basic_iostream<char_type, traits_type>::swap(__rhs); 1515 __sb_.swap(__rhs.__sb_); 1516} 1517 1518template <class _CharT, class _Traits> 1519inline _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y) { 1520 __x.swap(__y); 1521} 1522 1523template <class _CharT, class _Traits> 1524inline basic_filebuf<_CharT, _Traits>* basic_fstream<_CharT, _Traits>::rdbuf() const { 1525 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1526} 1527 1528template <class _CharT, class _Traits> 1529inline bool basic_fstream<_CharT, _Traits>::is_open() const { 1530 return __sb_.is_open(); 1531} 1532 1533template <class _CharT, class _Traits> 1534void basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1535 if (__sb_.open(__s, __mode)) 1536 this->clear(); 1537 else 1538 this->setstate(ios_base::failbit); 1539} 1540 1541# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1542template <class _CharT, class _Traits> 1543void basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1544 if (__sb_.open(__s, __mode)) 1545 this->clear(); 1546 else 1547 this->setstate(ios_base::failbit); 1548} 1549# endif 1550 1551template <class _CharT, class _Traits> 1552void basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1553 if (__sb_.open(__s, __mode)) 1554 this->clear(); 1555 else 1556 this->setstate(ios_base::failbit); 1557} 1558 1559template <class _CharT, class _Traits> 1560inline void basic_fstream<_CharT, _Traits>::close() { 1561 if (__sb_.close() == nullptr) 1562 this->setstate(ios_base::failbit); 1563} 1564 1565# if _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 1566extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>; 1567extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>; 1568extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>; 1569# endif 1570 1571_LIBCPP_END_NAMESPACE_STD 1572 1573# endif // _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 1574 1575_LIBCPP_POP_MACROS 1576 1577# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1578# include <atomic> 1579# include <concepts> 1580# include <cstdlib> 1581# include <iosfwd> 1582# include <limits> 1583# include <mutex> 1584# include <new> 1585# include <stdexcept> 1586# include <type_traits> 1587# endif 1588 1589# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23 1590# include <filesystem> 1591# endif 1592#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 1593 1594#endif // _LIBCPP_FSTREAM 1595