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#include <__algorithm/max.h> 190#include <__assert> 191#include <__config> 192#include <__filesystem/path.h> 193#include <__fwd/fstream.h> 194#include <__locale> 195#include <__memory/addressof.h> 196#include <__memory/unique_ptr.h> 197#include <__ostream/basic_ostream.h> 198#include <__type_traits/enable_if.h> 199#include <__type_traits/is_same.h> 200#include <__utility/move.h> 201#include <__utility/swap.h> 202#include <__utility/unreachable.h> 203#include <cstdio> 204#include <istream> 205#include <streambuf> 206#include <typeinfo> 207#include <version> 208 209#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 210# pragma GCC system_header 211#endif 212 213_LIBCPP_PUSH_MACROS 214#include <__undef_macros> 215 216#if !defined(_LIBCPP_MSVCRT) && !defined(_NEWLIB_VERSION) 217# define _LIBCPP_HAS_OFF_T_FUNCTIONS 1 218#else 219# define _LIBCPP_HAS_OFF_T_FUNCTIONS 0 220#endif 221 222#if _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 223 224_LIBCPP_BEGIN_NAMESPACE_STD 225 226# if _LIBCPP_STD_VER >= 26 && defined(_LIBCPP_WIN32API) 227_LIBCPP_EXPORTED_FROM_ABI void* __filebuf_windows_native_handle(FILE* __file) noexcept; 228# endif 229 230template <class _CharT, class _Traits> 231class _LIBCPP_TEMPLATE_VIS basic_filebuf : public basic_streambuf<_CharT, _Traits> { 232public: 233 typedef _CharT char_type; 234 typedef _Traits traits_type; 235 typedef typename traits_type::int_type int_type; 236 typedef typename traits_type::pos_type pos_type; 237 typedef typename traits_type::off_type off_type; 238 typedef typename traits_type::state_type state_type; 239# if _LIBCPP_STD_VER >= 26 240# if defined(_LIBCPP_WIN32API) 241 using native_handle_type = void*; // HANDLE 242# elif __has_include(<unistd.h>) 243 using native_handle_type = int; // POSIX file descriptor 244# else 245# error "Provide a native file handle!" 246# endif 247# endif 248 249 // 27.9.1.2 Constructors/destructor: 250 basic_filebuf(); 251 basic_filebuf(basic_filebuf&& __rhs); 252 ~basic_filebuf() override; 253 254 // 27.9.1.3 Assign/swap: 255 _LIBCPP_HIDE_FROM_ABI basic_filebuf& operator=(basic_filebuf&& __rhs); 256 void swap(basic_filebuf& __rhs); 257 258 // 27.9.1.4 Members: 259 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 260 basic_filebuf* open(const char* __s, ios_base::openmode __mode); 261# if _LIBCPP_HAS_OPEN_WITH_WCHAR 262 basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode); 263# endif 264 _LIBCPP_HIDE_FROM_ABI basic_filebuf* open(const string& __s, ios_base::openmode __mode); 265 266# if _LIBCPP_STD_VER >= 17 267 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI basic_filebuf* 268 open(const filesystem::path& __p, ios_base::openmode __mode) { 269 return open(__p.c_str(), __mode); 270 } 271# endif 272 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __open(int __fd, ios_base::openmode __mode); 273 basic_filebuf* close(); 274# if _LIBCPP_STD_VER >= 26 275 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { 276 _LIBCPP_ASSERT_UNCATEGORIZED(this->is_open(), "File must be opened"); 277# if defined(_LIBCPP_WIN32API) 278 return std::__filebuf_windows_native_handle(__file_); 279# elif __has_include(<unistd.h>) 280 return fileno(__file_); 281# else 282# error "Provide a way to determine the file native handle!" 283# endif 284 } 285# endif // _LIBCPP_STD_VER >= 26 286 287 _LIBCPP_HIDE_FROM_ABI inline static const char* __make_mdstring(ios_base::openmode __mode) _NOEXCEPT; 288# if _LIBCPP_HAS_OPEN_WITH_WCHAR 289 _LIBCPP_HIDE_FROM_ABI inline static const wchar_t* __make_mdwstring(ios_base::openmode __mode) _NOEXCEPT; 290# endif 291 292protected: 293 // 27.9.1.5 Overridden virtual functions: 294 int_type underflow() override; 295 int_type pbackfail(int_type __c = traits_type::eof()) override; 296 int_type overflow(int_type __c = traits_type::eof()) override; 297 basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n) override; 298 pos_type 299 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 300 pos_type seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 301 int sync() override; 302 void imbue(const locale& __loc) override; 303 304private: 305 char* __extbuf_; 306 const char* __extbufnext_; 307 const char* __extbufend_; 308 char __extbuf_min_[8]; 309 size_t __ebs_; 310 char_type* __intbuf_; 311 size_t __ibs_; 312 FILE* __file_; 313 const codecvt<char_type, char, state_type>* __cv_; 314 state_type __st_; 315 state_type __st_last_; 316 ios_base::openmode __om_; 317 // There have been no file operations yet, which allows setting unbuffered 318 // I/O mode. 319 static const ios_base::openmode __no_io_operations = ios_base::trunc; 320 // Unbuffered I/O mode has been requested. 321 static const ios_base::openmode __use_unbuffered_io = ios_base::ate; 322 // Used to track the currently used mode and track whether the output should 323 // be unbuffered. 324 // [filebuf.virtuals]/12 325 // If setbuf(0, 0) is called on a stream before any I/O has occurred on 326 // that stream, the stream becomes unbuffered. Otherwise the results are 327 // implementation-defined. 328 // This allows calling setbuf(0, 0) 329 // - before opening a file, 330 // - after opening a file, before 331 // - a read 332 // - a write 333 // - a seek. 334 // Note that opening a file with ios_base::ate does a seek operation. 335 // Normally underflow, overflow, and sync change this flag to ios_base::in, 336 // ios_base_out, or 0. 337 // 338 // The ios_base::trunc and ios_base::ate flags are not used in __cm_. They 339 // are used to track the state of the unbuffered request. For readability 340 // they have the aliases __no_io_operations and __use_unbuffered_io 341 // respectively. 342 // 343 // The __no_io_operations and __use_unbuffered_io flags are used in the 344 // following way: 345 // - __no_io_operations is set upon construction to indicate the unbuffered 346 // state can be set. 347 // - When requesting unbuffered output: 348 // - If the file is open it sets the mode. 349 // - Else places a request by adding the __use_unbuffered_io flag. 350 // - When a file is opened it checks whether both __no_io_operations and 351 // __use_unbuffered_io are set. If so switches to unbuffered mode. 352 // - All file I/O operations change the mode effectively clearing the 353 // __no_io_operations and __use_unbuffered_io flags. 354 ios_base::openmode __cm_; 355 bool __owns_eb_; 356 bool __owns_ib_; 357 bool __always_noconv_; 358 359 bool __read_mode(); 360 void __write_mode(); 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 !_LIBCPP_HAS_OFF_T_FUNCTIONS 937 if (fseek(__file_, __width > 0 ? __width * __off : 0, __whence)) 938 return pos_type(off_type(-1)); 939 pos_type __r = ftell(__file_); 940# else 941 if (::fseeko(__file_, __width > 0 ? __width * __off : 0, __whence)) 942 return pos_type(off_type(-1)); 943 pos_type __r = ftello(__file_); 944# endif 945 __r.state(__st_); 946 return __r; 947} 948 949template <class _CharT, class _Traits> 950typename basic_filebuf<_CharT, _Traits>::pos_type 951basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode) { 952 if (__file_ == nullptr || sync()) 953 return pos_type(off_type(-1)); 954# if !_LIBCPP_HAS_OFF_T_FUNCTIONS 955 if (fseek(__file_, __sp, SEEK_SET)) 956 return pos_type(off_type(-1)); 957# else 958 if (::fseeko(__file_, __sp, SEEK_SET)) 959 return pos_type(off_type(-1)); 960# endif 961 __st_ = __sp.state(); 962 return __sp; 963} 964 965template <class _CharT, class _Traits> 966int basic_filebuf<_CharT, _Traits>::sync() { 967 if (__file_ == nullptr) 968 return 0; 969 if (!__cv_) 970 __throw_bad_cast(); 971 972 if (__cm_ & ios_base::out) { 973 if (this->pptr() != this->pbase()) 974 if (overflow() == traits_type::eof()) 975 return -1; 976 codecvt_base::result __r; 977 do { 978 char* __extbe; 979 __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe); 980 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 981 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 982 return -1; 983 } while (__r == codecvt_base::partial); 984 if (__r == codecvt_base::error) 985 return -1; 986 if (fflush(__file_)) 987 return -1; 988 } else if (__cm_ & ios_base::in) { 989 off_type __c; 990 state_type __state = __st_last_; 991 bool __update_st = false; 992 if (__always_noconv_) 993 __c = this->egptr() - this->gptr(); 994 else { 995 int __width = __cv_->encoding(); 996 __c = __extbufend_ - __extbufnext_; 997 if (__width > 0) 998 __c += __width * (this->egptr() - this->gptr()); 999 else { 1000 if (this->gptr() != this->egptr()) { 1001 const int __off = __cv_->length(__state, __extbuf_, __extbufnext_, this->gptr() - this->eback()); 1002 __c += __extbufnext_ - __extbuf_ - __off; 1003 __update_st = true; 1004 } 1005 } 1006 } 1007# if !_LIBCPP_HAS_OFF_T_FUNCTIONS 1008 if (fseek(__file_, -__c, SEEK_CUR)) 1009 return -1; 1010# else 1011 if (::fseeko(__file_, -__c, SEEK_CUR)) 1012 return -1; 1013# endif 1014 if (__update_st) 1015 __st_ = __state; 1016 __extbufnext_ = __extbufend_ = __extbuf_; 1017 this->setg(nullptr, nullptr, nullptr); 1018 __cm_ = 0; 1019 } 1020 return 0; 1021} 1022 1023template <class _CharT, class _Traits> 1024void basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc) { 1025 sync(); 1026 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(__loc); 1027 bool __old_anc = __always_noconv_; 1028 __always_noconv_ = __cv_->always_noconv(); 1029 if (__old_anc != __always_noconv_) { 1030 this->setg(nullptr, nullptr, nullptr); 1031 this->setp(nullptr, nullptr); 1032 // invariant, char_type is char, else we couldn't get here 1033 if (__always_noconv_) // need to dump __intbuf_ 1034 { 1035 if (__owns_eb_) 1036 delete[] __extbuf_; 1037 __owns_eb_ = __owns_ib_; 1038 __ebs_ = __ibs_; 1039 __extbuf_ = (char*)__intbuf_; 1040 __ibs_ = 0; 1041 __intbuf_ = nullptr; 1042 __owns_ib_ = false; 1043 } else // need to obtain an __intbuf_. 1044 { // If __extbuf_ is user-supplied, use it, else new __intbuf_ 1045 if (!__owns_eb_ && __extbuf_ != __extbuf_min_) { 1046 __ibs_ = __ebs_; 1047 __intbuf_ = (char_type*)__extbuf_; 1048 __owns_ib_ = false; 1049 __extbuf_ = new char[__ebs_]; 1050 __owns_eb_ = true; 1051 } else { 1052 __ibs_ = __ebs_; 1053 __intbuf_ = new char_type[__ibs_]; 1054 __owns_ib_ = true; 1055 } 1056 } 1057 } 1058} 1059 1060template <class _CharT, class _Traits> 1061bool basic_filebuf<_CharT, _Traits>::__read_mode() { 1062 if (!(__cm_ & ios_base::in)) { 1063 this->setp(nullptr, nullptr); 1064 if (__always_noconv_) 1065 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_ + __ebs_, (char_type*)__extbuf_ + __ebs_); 1066 else 1067 this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_); 1068 __cm_ = ios_base::in; 1069 return true; 1070 } 1071 return false; 1072} 1073 1074template <class _CharT, class _Traits> 1075void basic_filebuf<_CharT, _Traits>::__write_mode() { 1076 if (!(__cm_ & ios_base::out)) { 1077 this->setg(nullptr, nullptr, nullptr); 1078 if (__ebs_ > sizeof(__extbuf_min_)) { 1079 if (__always_noconv_) 1080 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__ebs_ - 1)); 1081 else 1082 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1)); 1083 } else 1084 this->setp(nullptr, nullptr); 1085 __cm_ = ios_base::out; 1086 } 1087} 1088 1089// basic_ifstream 1090 1091template <class _CharT, class _Traits> 1092class _LIBCPP_TEMPLATE_VIS basic_ifstream : public basic_istream<_CharT, _Traits> { 1093public: 1094 typedef _CharT char_type; 1095 typedef _Traits traits_type; 1096 typedef typename traits_type::int_type int_type; 1097 typedef typename traits_type::pos_type pos_type; 1098 typedef typename traits_type::off_type off_type; 1099# if _LIBCPP_STD_VER >= 26 1100 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1101# endif 1102 1103 _LIBCPP_HIDE_FROM_ABI basic_ifstream(); 1104 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in); 1105# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1106 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1107# endif 1108 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in); 1109# if _LIBCPP_STD_VER >= 17 1110 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1111 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY 1112 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const _Tp& __p, ios_base::openmode __mode = ios_base::in) 1113 : basic_ifstream(__p.c_str(), __mode) {} 1114# endif // _LIBCPP_STD_VER >= 17 1115 _LIBCPP_HIDE_FROM_ABI basic_ifstream(basic_ifstream&& __rhs); 1116 _LIBCPP_HIDE_FROM_ABI basic_ifstream& operator=(basic_ifstream&& __rhs); 1117 _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream& __rhs); 1118 1119 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1120# if _LIBCPP_STD_VER >= 26 1121 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1122# endif 1123 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1124 void open(const char* __s, ios_base::openmode __mode = ios_base::in); 1125# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1126 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1127# endif 1128 void open(const string& __s, ios_base::openmode __mode = ios_base::in); 1129# if _LIBCPP_STD_VER >= 17 1130 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1131 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in) { 1132 return open(__p.c_str(), __mode); 1133 } 1134# endif // _LIBCPP_STD_VER >= 17 1135 1136 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1137 _LIBCPP_HIDE_FROM_ABI void close(); 1138 1139private: 1140 basic_filebuf<char_type, traits_type> __sb_; 1141}; 1142 1143template <class _CharT, class _Traits> 1144inline basic_ifstream<_CharT, _Traits>::basic_ifstream() 1145 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) {} 1146 1147template <class _CharT, class _Traits> 1148inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode) 1149 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1150 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1151 this->setstate(ios_base::failbit); 1152} 1153 1154# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1155template <class _CharT, class _Traits> 1156inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode) 1157 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1158 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1159 this->setstate(ios_base::failbit); 1160} 1161# endif 1162 1163// extension 1164template <class _CharT, class _Traits> 1165inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode) 1166 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1167 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1168 this->setstate(ios_base::failbit); 1169} 1170 1171template <class _CharT, class _Traits> 1172inline basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs) 1173 : basic_istream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1174 this->set_rdbuf(std::addressof(__sb_)); 1175} 1176 1177template <class _CharT, class _Traits> 1178inline basic_ifstream<_CharT, _Traits>& basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs) { 1179 basic_istream<char_type, traits_type>::operator=(std::move(__rhs)); 1180 __sb_ = std::move(__rhs.__sb_); 1181 return *this; 1182} 1183 1184template <class _CharT, class _Traits> 1185inline void basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs) { 1186 basic_istream<char_type, traits_type>::swap(__rhs); 1187 __sb_.swap(__rhs.__sb_); 1188} 1189 1190template <class _CharT, class _Traits> 1191inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y) { 1192 __x.swap(__y); 1193} 1194 1195template <class _CharT, class _Traits> 1196inline basic_filebuf<_CharT, _Traits>* basic_ifstream<_CharT, _Traits>::rdbuf() const { 1197 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1198} 1199 1200template <class _CharT, class _Traits> 1201inline bool basic_ifstream<_CharT, _Traits>::is_open() const { 1202 return __sb_.is_open(); 1203} 1204 1205template <class _CharT, class _Traits> 1206void basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1207 if (__sb_.open(__s, __mode | ios_base::in)) 1208 this->clear(); 1209 else 1210 this->setstate(ios_base::failbit); 1211} 1212 1213# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1214template <class _CharT, class _Traits> 1215void basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1216 if (__sb_.open(__s, __mode | ios_base::in)) 1217 this->clear(); 1218 else 1219 this->setstate(ios_base::failbit); 1220} 1221# endif 1222 1223template <class _CharT, class _Traits> 1224void basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1225 if (__sb_.open(__s, __mode | ios_base::in)) 1226 this->clear(); 1227 else 1228 this->setstate(ios_base::failbit); 1229} 1230 1231template <class _CharT, class _Traits> 1232inline void basic_ifstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1233 if (__sb_.__open(__fd, __mode | ios_base::in)) 1234 this->clear(); 1235 else 1236 this->setstate(ios_base::failbit); 1237} 1238 1239template <class _CharT, class _Traits> 1240inline void basic_ifstream<_CharT, _Traits>::close() { 1241 if (__sb_.close() == 0) 1242 this->setstate(ios_base::failbit); 1243} 1244 1245// basic_ofstream 1246 1247template <class _CharT, class _Traits> 1248class _LIBCPP_TEMPLATE_VIS basic_ofstream : public basic_ostream<_CharT, _Traits> { 1249public: 1250 typedef _CharT char_type; 1251 typedef _Traits traits_type; 1252 typedef typename traits_type::int_type int_type; 1253 typedef typename traits_type::pos_type pos_type; 1254 typedef typename traits_type::off_type off_type; 1255# if _LIBCPP_STD_VER >= 26 1256 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1257# endif 1258 1259 _LIBCPP_HIDE_FROM_ABI basic_ofstream(); 1260 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out); 1261# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1262 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1263# endif 1264 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out); 1265 1266# if _LIBCPP_STD_VER >= 17 1267 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1268 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY 1269 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const _Tp& __p, ios_base::openmode __mode = ios_base::out) 1270 : basic_ofstream(__p.c_str(), __mode) {} 1271# endif // _LIBCPP_STD_VER >= 17 1272 1273 _LIBCPP_HIDE_FROM_ABI basic_ofstream(basic_ofstream&& __rhs); 1274 _LIBCPP_HIDE_FROM_ABI basic_ofstream& operator=(basic_ofstream&& __rhs); 1275 _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream& __rhs); 1276 1277 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1278# if _LIBCPP_STD_VER >= 26 1279 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1280# endif 1281 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1282 void open(const char* __s, ios_base::openmode __mode = ios_base::out); 1283# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1284 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1285# endif 1286 void open(const string& __s, ios_base::openmode __mode = ios_base::out); 1287 1288# if _LIBCPP_STD_VER >= 17 1289 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1290 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out) { 1291 return open(__p.c_str(), __mode); 1292 } 1293# endif // _LIBCPP_STD_VER >= 17 1294 1295 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1296 _LIBCPP_HIDE_FROM_ABI void close(); 1297 1298private: 1299 basic_filebuf<char_type, traits_type> __sb_; 1300}; 1301 1302template <class _CharT, class _Traits> 1303inline basic_ofstream<_CharT, _Traits>::basic_ofstream() 1304 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) {} 1305 1306template <class _CharT, class _Traits> 1307inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode) 1308 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1309 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1310 this->setstate(ios_base::failbit); 1311} 1312 1313# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1314template <class _CharT, class _Traits> 1315inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode) 1316 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1317 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1318 this->setstate(ios_base::failbit); 1319} 1320# endif 1321 1322// extension 1323template <class _CharT, class _Traits> 1324inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode) 1325 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1326 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1327 this->setstate(ios_base::failbit); 1328} 1329 1330template <class _CharT, class _Traits> 1331inline basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs) 1332 : basic_ostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1333 this->set_rdbuf(std::addressof(__sb_)); 1334} 1335 1336template <class _CharT, class _Traits> 1337inline basic_ofstream<_CharT, _Traits>& basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs) { 1338 basic_ostream<char_type, traits_type>::operator=(std::move(__rhs)); 1339 __sb_ = std::move(__rhs.__sb_); 1340 return *this; 1341} 1342 1343template <class _CharT, class _Traits> 1344inline void basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs) { 1345 basic_ostream<char_type, traits_type>::swap(__rhs); 1346 __sb_.swap(__rhs.__sb_); 1347} 1348 1349template <class _CharT, class _Traits> 1350inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y) { 1351 __x.swap(__y); 1352} 1353 1354template <class _CharT, class _Traits> 1355inline basic_filebuf<_CharT, _Traits>* basic_ofstream<_CharT, _Traits>::rdbuf() const { 1356 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1357} 1358 1359template <class _CharT, class _Traits> 1360inline bool basic_ofstream<_CharT, _Traits>::is_open() const { 1361 return __sb_.is_open(); 1362} 1363 1364template <class _CharT, class _Traits> 1365void basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1366 if (__sb_.open(__s, __mode | ios_base::out)) 1367 this->clear(); 1368 else 1369 this->setstate(ios_base::failbit); 1370} 1371 1372# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1373template <class _CharT, class _Traits> 1374void basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1375 if (__sb_.open(__s, __mode | ios_base::out)) 1376 this->clear(); 1377 else 1378 this->setstate(ios_base::failbit); 1379} 1380# endif 1381 1382template <class _CharT, class _Traits> 1383void basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1384 if (__sb_.open(__s, __mode | ios_base::out)) 1385 this->clear(); 1386 else 1387 this->setstate(ios_base::failbit); 1388} 1389 1390template <class _CharT, class _Traits> 1391inline void basic_ofstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1392 if (__sb_.__open(__fd, __mode | ios_base::out)) 1393 this->clear(); 1394 else 1395 this->setstate(ios_base::failbit); 1396} 1397 1398template <class _CharT, class _Traits> 1399inline void basic_ofstream<_CharT, _Traits>::close() { 1400 if (__sb_.close() == nullptr) 1401 this->setstate(ios_base::failbit); 1402} 1403 1404// basic_fstream 1405 1406template <class _CharT, class _Traits> 1407class _LIBCPP_TEMPLATE_VIS basic_fstream : public basic_iostream<_CharT, _Traits> { 1408public: 1409 typedef _CharT char_type; 1410 typedef _Traits traits_type; 1411 typedef typename traits_type::int_type int_type; 1412 typedef typename traits_type::pos_type pos_type; 1413 typedef typename traits_type::off_type off_type; 1414# if _LIBCPP_STD_VER >= 26 1415 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1416# endif 1417 1418 _LIBCPP_HIDE_FROM_ABI basic_fstream(); 1419 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const char* __s, 1420 ios_base::openmode __mode = ios_base::in | ios_base::out); 1421# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1422 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const wchar_t* __s, 1423 ios_base::openmode __mode = ios_base::in | ios_base::out); 1424# endif 1425 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const string& __s, 1426 ios_base::openmode __mode = ios_base::in | ios_base::out); 1427 1428# if _LIBCPP_STD_VER >= 17 1429 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1430 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI explicit basic_fstream( 1431 const _Tp& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) 1432 : basic_fstream(__p.c_str(), __mode) {} 1433# endif // _LIBCPP_STD_VER >= 17 1434 1435 _LIBCPP_HIDE_FROM_ABI basic_fstream(basic_fstream&& __rhs); 1436 1437 _LIBCPP_HIDE_FROM_ABI basic_fstream& operator=(basic_fstream&& __rhs); 1438 1439 _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream& __rhs); 1440 1441 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1442# if _LIBCPP_STD_VER >= 26 1443 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1444# endif 1445 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1446 _LIBCPP_HIDE_FROM_ABI void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1447# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1448 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1449# endif 1450 _LIBCPP_HIDE_FROM_ABI void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1451 1452# if _LIBCPP_STD_VER >= 17 1453 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1454 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) { 1455 return open(__p.c_str(), __mode); 1456 } 1457# endif // _LIBCPP_STD_VER >= 17 1458 1459 _LIBCPP_HIDE_FROM_ABI void close(); 1460 1461private: 1462 basic_filebuf<char_type, traits_type> __sb_; 1463}; 1464 1465template <class _CharT, class _Traits> 1466inline basic_fstream<_CharT, _Traits>::basic_fstream() 1467 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) {} 1468 1469template <class _CharT, class _Traits> 1470inline basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode) 1471 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1472 if (__sb_.open(__s, __mode) == nullptr) 1473 this->setstate(ios_base::failbit); 1474} 1475 1476# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1477template <class _CharT, class _Traits> 1478inline basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode) 1479 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1480 if (__sb_.open(__s, __mode) == nullptr) 1481 this->setstate(ios_base::failbit); 1482} 1483# endif 1484 1485template <class _CharT, class _Traits> 1486inline basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode) 1487 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1488 if (__sb_.open(__s, __mode) == nullptr) 1489 this->setstate(ios_base::failbit); 1490} 1491 1492// extension 1493template <class _CharT, class _Traits> 1494inline basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs) 1495 : basic_iostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1496 this->set_rdbuf(std::addressof(__sb_)); 1497} 1498 1499template <class _CharT, class _Traits> 1500inline basic_fstream<_CharT, _Traits>& basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs) { 1501 basic_iostream<char_type, traits_type>::operator=(std::move(__rhs)); 1502 __sb_ = std::move(__rhs.__sb_); 1503 return *this; 1504} 1505 1506template <class _CharT, class _Traits> 1507inline void basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs) { 1508 basic_iostream<char_type, traits_type>::swap(__rhs); 1509 __sb_.swap(__rhs.__sb_); 1510} 1511 1512template <class _CharT, class _Traits> 1513inline _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y) { 1514 __x.swap(__y); 1515} 1516 1517template <class _CharT, class _Traits> 1518inline basic_filebuf<_CharT, _Traits>* basic_fstream<_CharT, _Traits>::rdbuf() const { 1519 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1520} 1521 1522template <class _CharT, class _Traits> 1523inline bool basic_fstream<_CharT, _Traits>::is_open() const { 1524 return __sb_.is_open(); 1525} 1526 1527template <class _CharT, class _Traits> 1528void basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1529 if (__sb_.open(__s, __mode)) 1530 this->clear(); 1531 else 1532 this->setstate(ios_base::failbit); 1533} 1534 1535# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1536template <class _CharT, class _Traits> 1537void basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1538 if (__sb_.open(__s, __mode)) 1539 this->clear(); 1540 else 1541 this->setstate(ios_base::failbit); 1542} 1543# endif 1544 1545template <class _CharT, class _Traits> 1546void basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1547 if (__sb_.open(__s, __mode)) 1548 this->clear(); 1549 else 1550 this->setstate(ios_base::failbit); 1551} 1552 1553template <class _CharT, class _Traits> 1554inline void basic_fstream<_CharT, _Traits>::close() { 1555 if (__sb_.close() == nullptr) 1556 this->setstate(ios_base::failbit); 1557} 1558 1559# if _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 1560extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>; 1561extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>; 1562extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>; 1563# endif 1564 1565_LIBCPP_END_NAMESPACE_STD 1566 1567#endif // _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 1568 1569_LIBCPP_POP_MACROS 1570 1571#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1572# include <atomic> 1573# include <concepts> 1574# include <cstdlib> 1575# include <iosfwd> 1576# include <limits> 1577# include <mutex> 1578# include <new> 1579# include <stdexcept> 1580# include <type_traits> 1581#endif 1582 1583#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23 1584# include <filesystem> 1585#endif 1586 1587#endif // _LIBCPP_FSTREAM 1588