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 <__config> 193 194# if _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 195 196# include <__algorithm/max.h> 197# include <__assert> 198# include <__filesystem/path.h> 199# include <__fwd/fstream.h> 200# include <__locale> 201# include <__memory/addressof.h> 202# include <__memory/unique_ptr.h> 203# include <__ostream/basic_ostream.h> 204# include <__type_traits/enable_if.h> 205# include <__type_traits/is_same.h> 206# include <__utility/move.h> 207# include <__utility/swap.h> 208# include <__utility/unreachable.h> 209# include <cstdio> 210# include <istream> 211# include <streambuf> 212# include <typeinfo> 213# include <version> 214 215# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 216# pragma GCC system_header 217# endif 218 219_LIBCPP_PUSH_MACROS 220# include <__undef_macros> 221 222_LIBCPP_BEGIN_NAMESPACE_STD 223 224# if _LIBCPP_STD_VER >= 26 && defined(_LIBCPP_WIN32API) 225_LIBCPP_EXPORTED_FROM_ABI void* __filebuf_windows_native_handle(FILE* __file) noexcept; 226# endif 227 228template <class _CharT, class _Traits> 229class basic_filebuf : public basic_streambuf<_CharT, _Traits> { 230public: 231 typedef _CharT char_type; 232 typedef _Traits traits_type; 233 typedef typename traits_type::int_type int_type; 234 typedef typename traits_type::pos_type pos_type; 235 typedef typename traits_type::off_type off_type; 236 typedef typename traits_type::state_type state_type; 237# if _LIBCPP_STD_VER >= 26 238# if defined(_LIBCPP_WIN32API) 239 using native_handle_type = void*; // HANDLE 240# elif __has_include(<unistd.h>) 241 using native_handle_type = int; // POSIX file descriptor 242# else 243# error "Provide a native file handle!" 244# endif 245# endif 246 247 // 27.9.1.2 Constructors/destructor: 248 basic_filebuf(); 249 basic_filebuf(basic_filebuf&& __rhs); 250 ~basic_filebuf() override; 251 252 // 27.9.1.3 Assign/swap: 253 _LIBCPP_HIDE_FROM_ABI basic_filebuf& operator=(basic_filebuf&& __rhs); 254 void swap(basic_filebuf& __rhs); 255 256 // 27.9.1.4 Members: 257 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 258 basic_filebuf* open(const char* __s, ios_base::openmode __mode); 259# if _LIBCPP_HAS_OPEN_WITH_WCHAR 260 basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode); 261# endif 262 _LIBCPP_HIDE_FROM_ABI basic_filebuf* open(const string& __s, ios_base::openmode __mode); 263 264# if _LIBCPP_STD_VER >= 17 265 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI basic_filebuf* 266 open(const filesystem::path& __p, ios_base::openmode __mode) { 267 return open(__p.c_str(), __mode); 268 } 269# endif 270 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __open(int __fd, ios_base::openmode __mode); 271 basic_filebuf* close(); 272# if _LIBCPP_STD_VER >= 26 273 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { 274 _LIBCPP_ASSERT_UNCATEGORIZED(this->is_open(), "File must be opened"); 275# if defined(_LIBCPP_WIN32API) 276 return std::__filebuf_windows_native_handle(__file_); 277# elif __has_include(<unistd.h>) 278 return fileno(__file_); 279# else 280# error "Provide a way to determine the file native handle!" 281# endif 282 } 283# endif // _LIBCPP_STD_VER >= 26 284 285 _LIBCPP_HIDE_FROM_ABI inline static const char* __make_mdstring(ios_base::openmode __mode) _NOEXCEPT; 286# if _LIBCPP_HAS_OPEN_WITH_WCHAR 287 _LIBCPP_HIDE_FROM_ABI inline static const wchar_t* __make_mdwstring(ios_base::openmode __mode) _NOEXCEPT; 288# endif 289 290protected: 291 // 27.9.1.5 Overridden virtual functions: 292 int_type underflow() override; 293 int_type pbackfail(int_type __c = traits_type::eof()) override; 294 int_type overflow(int_type __c = traits_type::eof()) override; 295 basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n) override; 296 pos_type 297 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 298 pos_type seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 299 int sync() override; 300 void imbue(const locale& __loc) override; 301 302private: 303 char* __extbuf_; 304 const char* __extbufnext_; 305 const char* __extbufend_; 306 char __extbuf_min_[8]; 307 size_t __ebs_; 308 char_type* __intbuf_; 309 size_t __ibs_; 310 FILE* __file_; 311 const codecvt<char_type, char, state_type>* __cv_; 312 state_type __st_; 313 state_type __st_last_; 314 ios_base::openmode __om_; 315 // There have been no file operations yet, which allows setting unbuffered 316 // I/O mode. 317 static const ios_base::openmode __no_io_operations = ios_base::trunc; 318 // Unbuffered I/O mode has been requested. 319 static const ios_base::openmode __use_unbuffered_io = ios_base::ate; 320 // Used to track the currently used mode and track whether the output should 321 // be unbuffered. 322 // [filebuf.virtuals]/12 323 // If setbuf(0, 0) is called on a stream before any I/O has occurred on 324 // that stream, the stream becomes unbuffered. Otherwise the results are 325 // implementation-defined. 326 // This allows calling setbuf(0, 0) 327 // - before opening a file, 328 // - after opening a file, before 329 // - a read 330 // - a write 331 // - a seek. 332 // Note that opening a file with ios_base::ate does a seek operation. 333 // Normally underflow, overflow, and sync change this flag to ios_base::in, 334 // ios_base_out, or 0. 335 // 336 // The ios_base::trunc and ios_base::ate flags are not used in __cm_. They 337 // are used to track the state of the unbuffered request. For readability 338 // they have the aliases __no_io_operations and __use_unbuffered_io 339 // respectively. 340 // 341 // The __no_io_operations and __use_unbuffered_io flags are used in the 342 // following way: 343 // - __no_io_operations is set upon construction to indicate the unbuffered 344 // state can be set. 345 // - When requesting unbuffered output: 346 // - If the file is open it sets the mode. 347 // - Else places a request by adding the __use_unbuffered_io flag. 348 // - When a file is opened it checks whether both __no_io_operations and 349 // __use_unbuffered_io are set. If so switches to unbuffered mode. 350 // - All file I/O operations change the mode effectively clearing the 351 // __no_io_operations and __use_unbuffered_io flags. 352 ios_base::openmode __cm_; 353 bool __owns_eb_; 354 bool __owns_ib_; 355 bool __always_noconv_; 356 357 bool __read_mode(); 358 void __write_mode(); 359 360 _LIBCPP_HIDE_FROM_ABI static int __fseek(FILE* __file, pos_type __offset, int __whence); 361 _LIBCPP_HIDE_FROM_ABI static pos_type __ftell(FILE* __file); 362 363 _LIBCPP_EXPORTED_FROM_ABI friend FILE* __get_ostream_file(ostream&); 364 365 // There are multiple (__)open function, they use different C-API open 366 // function. After that call these functions behave the same. This function 367 // does that part and determines the final return value. 368 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __do_open(FILE* __file, ios_base::openmode __mode) { 369 __file_ = __file; 370 if (!__file_) 371 return nullptr; 372 373 __om_ = __mode; 374 if (__cm_ == (__no_io_operations | __use_unbuffered_io)) { 375 std::setbuf(__file_, nullptr); 376 __cm_ = 0; 377 } 378 379 if (__mode & ios_base::ate) { 380 __cm_ = 0; 381 if (fseek(__file_, 0, SEEK_END)) { 382 fclose(__file_); 383 __file_ = nullptr; 384 return nullptr; 385 } 386 } 387 388 return this; 389 } 390 391 // If the file is already open, switch to unbuffered mode. Otherwise, record 392 // the request to use unbuffered mode so that we use that mode when we 393 // eventually open the file. 394 _LIBCPP_HIDE_FROM_ABI void __request_unbuffered_mode(char_type* __s, streamsize __n) { 395 if (__cm_ == __no_io_operations && __s == nullptr && __n == 0) { 396 if (__file_) { 397 std::setbuf(__file_, nullptr); 398 __cm_ = 0; 399 } else { 400 __cm_ = __no_io_operations | __use_unbuffered_io; 401 } 402 } 403 } 404 405 _LIBCPP_HIDE_FROM_ABI typename traits_type::int_type __overflow_failed() { 406 if (this->pptr() == this->epptr() + 1) { 407 this->pbump(-1); // lose the character we overflowed above -- we don't really have a 408 // choice since we couldn't commit the contents of the put area 409 } 410 return traits_type::eof(); 411 } 412}; 413 414template <class _CharT, class _Traits> 415basic_filebuf<_CharT, _Traits>::basic_filebuf() 416 : __extbuf_(nullptr), 417 __extbufnext_(nullptr), 418 __extbufend_(nullptr), 419 __ebs_(0), 420 __intbuf_(nullptr), 421 __ibs_(0), 422 __file_(nullptr), 423 __cv_(nullptr), 424 __st_(), 425 __st_last_(), 426 __om_(0), 427 __cm_(__no_io_operations), 428 __owns_eb_(false), 429 __owns_ib_(false), 430 __always_noconv_(false) { 431 if (std::has_facet<codecvt<char_type, char, state_type> >(this->getloc())) { 432 __cv_ = std::addressof(std::use_facet<codecvt<char_type, char, state_type> >(this->getloc())); 433 __always_noconv_ = __cv_->always_noconv(); 434 } 435 setbuf(nullptr, 4096); 436} 437 438template <class _CharT, class _Traits> 439basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs) : basic_streambuf<_CharT, _Traits>(__rhs) { 440 if (__rhs.__extbuf_ == __rhs.__extbuf_min_) { 441 __extbuf_ = __extbuf_min_; 442 __extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_); 443 __extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_); 444 } else { 445 __extbuf_ = __rhs.__extbuf_; 446 __extbufnext_ = __rhs.__extbufnext_; 447 __extbufend_ = __rhs.__extbufend_; 448 } 449 __ebs_ = __rhs.__ebs_; 450 __intbuf_ = __rhs.__intbuf_; 451 __ibs_ = __rhs.__ibs_; 452 __file_ = __rhs.__file_; 453 __cv_ = __rhs.__cv_; 454 __st_ = __rhs.__st_; 455 __st_last_ = __rhs.__st_last_; 456 __om_ = __rhs.__om_; 457 __cm_ = __rhs.__cm_; 458 __owns_eb_ = __rhs.__owns_eb_; 459 __owns_ib_ = __rhs.__owns_ib_; 460 __always_noconv_ = __rhs.__always_noconv_; 461 if (__rhs.pbase()) { 462 if (__rhs.pbase() == __rhs.__intbuf_) 463 this->setp(__intbuf_, __intbuf_ + (__rhs.epptr() - __rhs.pbase())); 464 else 465 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__rhs.epptr() - __rhs.pbase())); 466 this->__pbump(__rhs.pptr() - __rhs.pbase()); 467 } else if (__rhs.eback()) { 468 if (__rhs.eback() == __rhs.__intbuf_) 469 this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()), __intbuf_ + (__rhs.egptr() - __rhs.eback())); 470 else 471 this->setg((char_type*)__extbuf_, 472 (char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()), 473 (char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback())); 474 } 475 __rhs.__extbuf_ = nullptr; 476 __rhs.__extbufnext_ = nullptr; 477 __rhs.__extbufend_ = nullptr; 478 __rhs.__ebs_ = 0; 479 __rhs.__intbuf_ = 0; 480 __rhs.__ibs_ = 0; 481 __rhs.__file_ = nullptr; 482 __rhs.__st_ = state_type(); 483 __rhs.__st_last_ = state_type(); 484 __rhs.__om_ = 0; 485 __rhs.__cm_ = 0; 486 __rhs.__owns_eb_ = false; 487 __rhs.__owns_ib_ = false; 488 __rhs.setg(0, 0, 0); 489 __rhs.setp(0, 0); 490} 491 492template <class _CharT, class _Traits> 493inline basic_filebuf<_CharT, _Traits>& basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs) { 494 close(); 495 swap(__rhs); 496 return *this; 497} 498 499template <class _CharT, class _Traits> 500basic_filebuf<_CharT, _Traits>::~basic_filebuf() { 501# if _LIBCPP_HAS_EXCEPTIONS 502 try { 503# endif // _LIBCPP_HAS_EXCEPTIONS 504 close(); 505# if _LIBCPP_HAS_EXCEPTIONS 506 } catch (...) { 507 } 508# endif // _LIBCPP_HAS_EXCEPTIONS 509 if (__owns_eb_) 510 delete[] __extbuf_; 511 if (__owns_ib_) 512 delete[] __intbuf_; 513} 514 515template <class _CharT, class _Traits> 516void basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs) { 517 basic_streambuf<char_type, traits_type>::swap(__rhs); 518 if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { 519 // Neither *this nor __rhs uses the small buffer, so we can simply swap the pointers. 520 std::swap(__extbuf_, __rhs.__extbuf_); 521 std::swap(__extbufnext_, __rhs.__extbufnext_); 522 std::swap(__extbufend_, __rhs.__extbufend_); 523 } else { 524 ptrdiff_t __ln = __extbufnext_ ? __extbufnext_ - __extbuf_ : 0; 525 ptrdiff_t __le = __extbufend_ ? __extbufend_ - __extbuf_ : 0; 526 ptrdiff_t __rn = __rhs.__extbufnext_ ? __rhs.__extbufnext_ - __rhs.__extbuf_ : 0; 527 ptrdiff_t __re = __rhs.__extbufend_ ? __rhs.__extbufend_ - __rhs.__extbuf_ : 0; 528 if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { 529 // *this uses the small buffer, but __rhs doesn't. 530 __extbuf_ = __rhs.__extbuf_; 531 __rhs.__extbuf_ = __rhs.__extbuf_min_; 532 std::memmove(__rhs.__extbuf_min_, __extbuf_min_, sizeof(__extbuf_min_)); 533 } else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_) { 534 // *this doesn't use the small buffer, but __rhs does. 535 __rhs.__extbuf_ = __extbuf_; 536 __extbuf_ = __extbuf_min_; 537 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 538 } else { 539 // Both *this and __rhs use the small buffer. 540 char __tmp[sizeof(__extbuf_min_)]; 541 std::memmove(__tmp, __extbuf_min_, sizeof(__extbuf_min_)); 542 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 543 std::memmove(__rhs.__extbuf_min_, __tmp, sizeof(__extbuf_min_)); 544 } 545 __extbufnext_ = __extbuf_ + __rn; 546 __extbufend_ = __extbuf_ + __re; 547 __rhs.__extbufnext_ = __rhs.__extbuf_ + __ln; 548 __rhs.__extbufend_ = __rhs.__extbuf_ + __le; 549 } 550 std::swap(__ebs_, __rhs.__ebs_); 551 std::swap(__intbuf_, __rhs.__intbuf_); 552 std::swap(__ibs_, __rhs.__ibs_); 553 std::swap(__file_, __rhs.__file_); 554 std::swap(__cv_, __rhs.__cv_); 555 std::swap(__st_, __rhs.__st_); 556 std::swap(__st_last_, __rhs.__st_last_); 557 std::swap(__om_, __rhs.__om_); 558 std::swap(__cm_, __rhs.__cm_); 559 std::swap(__owns_eb_, __rhs.__owns_eb_); 560 std::swap(__owns_ib_, __rhs.__owns_ib_); 561 std::swap(__always_noconv_, __rhs.__always_noconv_); 562 if (this->eback() == (char_type*)__rhs.__extbuf_min_) { 563 ptrdiff_t __n = this->gptr() - this->eback(); 564 ptrdiff_t __e = this->egptr() - this->eback(); 565 this->setg((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __n, (char_type*)__extbuf_min_ + __e); 566 } else if (this->pbase() == (char_type*)__rhs.__extbuf_min_) { 567 ptrdiff_t __n = this->pptr() - this->pbase(); 568 ptrdiff_t __e = this->epptr() - this->pbase(); 569 this->setp((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __e); 570 this->__pbump(__n); 571 } 572 if (__rhs.eback() == (char_type*)__extbuf_min_) { 573 ptrdiff_t __n = __rhs.gptr() - __rhs.eback(); 574 ptrdiff_t __e = __rhs.egptr() - __rhs.eback(); 575 __rhs.setg( 576 (char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __n, (char_type*)__rhs.__extbuf_min_ + __e); 577 } else if (__rhs.pbase() == (char_type*)__extbuf_min_) { 578 ptrdiff_t __n = __rhs.pptr() - __rhs.pbase(); 579 ptrdiff_t __e = __rhs.epptr() - __rhs.pbase(); 580 __rhs.setp((char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __e); 581 __rhs.__pbump(__n); 582 } 583} 584 585template <class _CharT, class _Traits> 586inline _LIBCPP_HIDE_FROM_ABI void swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y) { 587 __x.swap(__y); 588} 589 590template <class _CharT, class _Traits> 591inline bool basic_filebuf<_CharT, _Traits>::is_open() const { 592 return __file_ != nullptr; 593} 594 595template <class _CharT, class _Traits> 596const char* basic_filebuf<_CharT, _Traits>::__make_mdstring(ios_base::openmode __mode) _NOEXCEPT { 597 switch (__mode & ~ios_base::ate) { 598 case ios_base::out: 599 case ios_base::out | ios_base::trunc: 600 return "w" _LIBCPP_FOPEN_CLOEXEC_MODE; 601 case ios_base::out | ios_base::app: 602 case ios_base::app: 603 return "a" _LIBCPP_FOPEN_CLOEXEC_MODE; 604 case ios_base::in: 605 return "r" _LIBCPP_FOPEN_CLOEXEC_MODE; 606 case ios_base::in | ios_base::out: 607 return "r+" _LIBCPP_FOPEN_CLOEXEC_MODE; 608 case ios_base::in | ios_base::out | ios_base::trunc: 609 return "w+" _LIBCPP_FOPEN_CLOEXEC_MODE; 610 case ios_base::in | ios_base::out | ios_base::app: 611 case ios_base::in | ios_base::app: 612 return "a+" _LIBCPP_FOPEN_CLOEXEC_MODE; 613 case ios_base::out | ios_base::binary: 614 case ios_base::out | ios_base::trunc | ios_base::binary: 615 return "wb" _LIBCPP_FOPEN_CLOEXEC_MODE; 616 case ios_base::out | ios_base::app | ios_base::binary: 617 case ios_base::app | ios_base::binary: 618 return "ab" _LIBCPP_FOPEN_CLOEXEC_MODE; 619 case ios_base::in | ios_base::binary: 620 return "rb" _LIBCPP_FOPEN_CLOEXEC_MODE; 621 case ios_base::in | ios_base::out | ios_base::binary: 622 return "r+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 623 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 624 return "w+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 625 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 626 case ios_base::in | ios_base::app | ios_base::binary: 627 return "a+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 628# if _LIBCPP_STD_VER >= 23 629 case ios_base::out | ios_base::noreplace: 630 case ios_base::out | ios_base::trunc | ios_base::noreplace: 631 return "wx" _LIBCPP_FOPEN_CLOEXEC_MODE; 632 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::noreplace: 633 return "w+x" _LIBCPP_FOPEN_CLOEXEC_MODE; 634 case ios_base::out | ios_base::binary | ios_base::noreplace: 635 case ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 636 return "wbx" _LIBCPP_FOPEN_CLOEXEC_MODE; 637 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 638 return "w+bx" _LIBCPP_FOPEN_CLOEXEC_MODE; 639# endif // _LIBCPP_STD_VER >= 23 640 default: 641 return nullptr; 642 } 643 __libcpp_unreachable(); 644} 645 646# if _LIBCPP_HAS_OPEN_WITH_WCHAR 647template <class _CharT, class _Traits> 648const wchar_t* basic_filebuf<_CharT, _Traits>::__make_mdwstring(ios_base::openmode __mode) _NOEXCEPT { 649 switch (__mode & ~ios_base::ate) { 650 case ios_base::out: 651 case ios_base::out | ios_base::trunc: 652 return L"w"; 653 case ios_base::out | ios_base::app: 654 case ios_base::app: 655 return L"a"; 656 case ios_base::in: 657 return L"r"; 658 case ios_base::in | ios_base::out: 659 return L"r+"; 660 case ios_base::in | ios_base::out | ios_base::trunc: 661 return L"w+"; 662 case ios_base::in | ios_base::out | ios_base::app: 663 case ios_base::in | ios_base::app: 664 return L"a+"; 665 case ios_base::out | ios_base::binary: 666 case ios_base::out | ios_base::trunc | ios_base::binary: 667 return L"wb"; 668 case ios_base::out | ios_base::app | ios_base::binary: 669 case ios_base::app | ios_base::binary: 670 return L"ab"; 671 case ios_base::in | ios_base::binary: 672 return L"rb"; 673 case ios_base::in | ios_base::out | ios_base::binary: 674 return L"r+b"; 675 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 676 return L"w+b"; 677 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 678 case ios_base::in | ios_base::app | ios_base::binary: 679 return L"a+b"; 680# if _LIBCPP_STD_VER >= 23 681 case ios_base::out | ios_base::noreplace: 682 case ios_base::out | ios_base::trunc | ios_base::noreplace: 683 return L"wx"; 684 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::noreplace: 685 return L"w+x"; 686 case ios_base::out | ios_base::binary | ios_base::noreplace: 687 case ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 688 return L"wbx"; 689 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: 690 return L"w+bx"; 691# endif // _LIBCPP_STD_VER >= 23 692 default: 693 return nullptr; 694 } 695 __libcpp_unreachable(); 696} 697# endif 698 699template <class _CharT, class _Traits> 700basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 701 if (__file_) 702 return nullptr; 703 const char* __mdstr = __make_mdstring(__mode); 704 if (!__mdstr) 705 return nullptr; 706 707 return __do_open(std::fopen(__s, __mdstr), __mode); 708} 709 710template <class _CharT, class _Traits> 711inline basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 712 if (__file_) 713 return nullptr; 714 const char* __mdstr = __make_mdstring(__mode); 715 if (!__mdstr) 716 return nullptr; 717 718 return __do_open(fdopen(__fd, __mdstr), __mode); 719} 720 721# if _LIBCPP_HAS_OPEN_WITH_WCHAR 722// This is basically the same as the char* overload except that it uses _wfopen 723// and long mode strings. 724template <class _CharT, class _Traits> 725basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 726 if (__file_) 727 return nullptr; 728 const wchar_t* __mdstr = __make_mdwstring(__mode); 729 if (!__mdstr) 730 return nullptr; 731 732 return __do_open(_wfopen(__s, __mdstr), __mode); 733} 734# endif 735 736template <class _CharT, class _Traits> 737inline basic_filebuf<_CharT, _Traits>* 738basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 739 return open(__s.c_str(), __mode); 740} 741 742template <class _CharT, class _Traits> 743basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::close() { 744 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 745 if (__file_) { 746 __rt = this; 747 unique_ptr<FILE, int (*)(FILE*)> __h(__file_, fclose); 748 if (sync()) 749 __rt = nullptr; 750 if (fclose(__h.release())) 751 __rt = nullptr; 752 __file_ = nullptr; 753 setbuf(0, 0); 754 } 755 return __rt; 756} 757 758template <class _CharT, class _Traits> 759typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::underflow() { 760 if (__file_ == nullptr) 761 return traits_type::eof(); 762 bool __initial = __read_mode(); 763 char_type __1buf; 764 if (this->gptr() == nullptr) 765 this->setg(std::addressof(__1buf), std::addressof(__1buf) + 1, std::addressof(__1buf) + 1); 766 const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4); 767 int_type __c = traits_type::eof(); 768 if (this->gptr() == this->egptr()) { 769 std::memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type)); 770 if (__always_noconv_) { 771 size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz); 772 __nmemb = std::fread(this->eback() + __unget_sz, 1, __nmemb, __file_); 773 if (__nmemb != 0) { 774 this->setg(this->eback(), this->eback() + __unget_sz, this->eback() + __unget_sz + __nmemb); 775 __c = traits_type::to_int_type(*this->gptr()); 776 } 777 } else { 778 if (__extbufend_ != __extbufnext_) { 779 _LIBCPP_ASSERT_NON_NULL(__extbufnext_ != nullptr, "underflow moving from nullptr"); 780 _LIBCPP_ASSERT_NON_NULL(__extbuf_ != nullptr, "underflow moving into nullptr"); 781 std::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_); 782 } 783 __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_); 784 __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_); 785 size_t __nmemb = 786 std::min(static_cast<size_t>(__ibs_ - __unget_sz), static_cast<size_t>(__extbufend_ - __extbufnext_)); 787 codecvt_base::result __r; 788 __st_last_ = __st_; 789 size_t __nr = std::fread((void*)const_cast<char*>(__extbufnext_), 1, __nmemb, __file_); 790 if (__nr != 0) { 791 if (!__cv_) 792 std::__throw_bad_cast(); 793 794 __extbufend_ = __extbufnext_ + __nr; 795 char_type* __inext; 796 __r = __cv_->in( 797 __st_, __extbuf_, __extbufend_, __extbufnext_, this->eback() + __unget_sz, this->eback() + __ibs_, __inext); 798 if (__r == codecvt_base::noconv) { 799 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)const_cast<char*>(__extbufend_)); 800 __c = traits_type::to_int_type(*this->gptr()); 801 } else if (__inext != this->eback() + __unget_sz) { 802 this->setg(this->eback(), this->eback() + __unget_sz, __inext); 803 __c = traits_type::to_int_type(*this->gptr()); 804 } 805 } 806 } 807 } else 808 __c = traits_type::to_int_type(*this->gptr()); 809 if (this->eback() == std::addressof(__1buf)) 810 this->setg(nullptr, nullptr, nullptr); 811 return __c; 812} 813 814template <class _CharT, class _Traits> 815typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c) { 816 if (__file_ && this->eback() < this->gptr()) { 817 if (traits_type::eq_int_type(__c, traits_type::eof())) { 818 this->gbump(-1); 819 return traits_type::not_eof(__c); 820 } 821 if ((__om_ & ios_base::out) || traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) { 822 this->gbump(-1); 823 *this->gptr() = traits_type::to_char_type(__c); 824 return __c; 825 } 826 } 827 return traits_type::eof(); 828} 829 830template <class _CharT, class _Traits> 831typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::overflow(int_type __c) { 832 if (__file_ == nullptr) 833 return traits_type::eof(); 834 __write_mode(); 835 char_type __1buf; 836 char_type* __pb_save = this->pbase(); 837 char_type* __epb_save = this->epptr(); 838 if (!traits_type::eq_int_type(__c, traits_type::eof())) { 839 if (this->pptr() == nullptr) 840 this->setp(std::addressof(__1buf), std::addressof(__1buf) + 1); 841 *this->pptr() = traits_type::to_char_type(__c); 842 this->pbump(1); 843 } 844 845 // There is nothing to write, early return 846 if (this->pptr() == this->pbase()) { 847 return traits_type::not_eof(__c); 848 } 849 850 if (__always_noconv_) { 851 size_t __n = static_cast<size_t>(this->pptr() - this->pbase()); 852 if (std::fwrite(this->pbase(), sizeof(char_type), __n, __file_) != __n) { 853 return __overflow_failed(); 854 } 855 } else { 856 if (!__cv_) 857 std::__throw_bad_cast(); 858 859 // See [filebuf.virtuals] 860 char_type* __b = this->pbase(); 861 char_type* __p = this->pptr(); 862 const char_type* __end; 863 char* __extbuf_end = __extbuf_; 864 do { 865 codecvt_base::result __r = __cv_->out(__st_, __b, __p, __end, __extbuf_, __extbuf_ + __ebs_, __extbuf_end); 866 if (__end == __b) { 867 return __overflow_failed(); 868 } 869 870 // No conversion needed: output characters directly to the file, done. 871 if (__r == codecvt_base::noconv) { 872 size_t __n = static_cast<size_t>(__p - __b); 873 if (std::fwrite(__b, 1, __n, __file_) != __n) { 874 return __overflow_failed(); 875 } 876 break; 877 878 // Conversion successful: output the converted characters to the file, done. 879 } else if (__r == codecvt_base::ok) { 880 size_t __n = static_cast<size_t>(__extbuf_end - __extbuf_); 881 if (std::fwrite(__extbuf_, 1, __n, __file_) != __n) { 882 return __overflow_failed(); 883 } 884 break; 885 886 // Conversion partially successful: output converted characters to the file and repeat with the 887 // remaining characters. 888 } else if (__r == codecvt_base::partial) { 889 size_t __n = static_cast<size_t>(__extbuf_end - __extbuf_); 890 if (std::fwrite(__extbuf_, 1, __n, __file_) != __n) { 891 return __overflow_failed(); 892 } 893 __b = const_cast<char_type*>(__end); 894 continue; 895 896 } else { 897 return __overflow_failed(); 898 } 899 } while (true); 900 } 901 this->setp(__pb_save, __epb_save); 902 return traits_type::not_eof(__c); 903} 904 905template <class _CharT, class _Traits> 906basic_streambuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n) { 907 this->setg(nullptr, nullptr, nullptr); 908 this->setp(nullptr, nullptr); 909 __request_unbuffered_mode(__s, __n); 910 if (__owns_eb_) 911 delete[] __extbuf_; 912 if (__owns_ib_) 913 delete[] __intbuf_; 914 __ebs_ = __n; 915 if (__ebs_ > sizeof(__extbuf_min_)) { 916 if (__always_noconv_ && __s) { 917 __extbuf_ = (char*)__s; 918 __owns_eb_ = false; 919 } else { 920 __extbuf_ = new char[__ebs_]; 921 __owns_eb_ = true; 922 } 923 } else { 924 __extbuf_ = __extbuf_min_; 925 __ebs_ = sizeof(__extbuf_min_); 926 __owns_eb_ = false; 927 } 928 if (!__always_noconv_) { 929 __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_)); 930 if (__s && __ibs_ > sizeof(__extbuf_min_)) { 931 __intbuf_ = __s; 932 __owns_ib_ = false; 933 } else { 934 __intbuf_ = new char_type[__ibs_]; 935 __owns_ib_ = true; 936 } 937 } else { 938 __ibs_ = 0; 939 __intbuf_ = nullptr; 940 __owns_ib_ = false; 941 } 942 return this; 943} 944 945template <class _CharT, class _Traits> 946typename basic_filebuf<_CharT, _Traits>::pos_type 947basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode) { 948 if (!__cv_) 949 std::__throw_bad_cast(); 950 951 int __width = __cv_->encoding(); 952 if (__file_ == nullptr || (__width <= 0 && __off != 0) || sync()) 953 return pos_type(off_type(-1)); 954 // __width > 0 || __off == 0 955 int __whence; 956 switch (__way) { 957 case ios_base::beg: 958 __whence = SEEK_SET; 959 break; 960 case ios_base::cur: 961 __whence = SEEK_CUR; 962 break; 963 case ios_base::end: 964 __whence = SEEK_END; 965 break; 966 default: 967 return pos_type(off_type(-1)); 968 } 969 if (__fseek(__file_, __width > 0 ? __width * __off : 0, __whence)) 970 return pos_type(off_type(-1)); 971 pos_type __r = __ftell(__file_); 972 __r.state(__st_); 973 return __r; 974} 975 976template <class _CharT, class _Traits> 977int basic_filebuf<_CharT, _Traits>::__fseek(FILE* __file, pos_type __offset, int __whence) { 978# if defined(_LIBCPP_MSVCRT_LIKE) 979 return _fseeki64(__file, __offset, __whence); 980# elif defined(_NEWLIB_VERSION) 981 return fseek(__file, __offset, __whence); 982# else 983 return ::fseeko(__file, __offset, __whence); 984# endif 985} 986 987template <class _CharT, class _Traits> 988typename basic_filebuf<_CharT, _Traits>::pos_type basic_filebuf<_CharT, _Traits>::__ftell(FILE* __file) { 989# if defined(_LIBCPP_MSVCRT_LIKE) 990 return _ftelli64(__file); 991# elif defined(_NEWLIB_VERSION) 992 return ftell(__file); 993# else 994 return ftello(__file); 995# endif 996} 997 998template <class _CharT, class _Traits> 999typename basic_filebuf<_CharT, _Traits>::pos_type 1000basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode) { 1001 if (__file_ == nullptr || sync()) 1002 return pos_type(off_type(-1)); 1003 if (__fseek(__file_, __sp, SEEK_SET)) 1004 return pos_type(off_type(-1)); 1005 __st_ = __sp.state(); 1006 return __sp; 1007} 1008 1009template <class _CharT, class _Traits> 1010int basic_filebuf<_CharT, _Traits>::sync() { 1011 if (__file_ == nullptr) 1012 return 0; 1013 if (!__cv_) 1014 std::__throw_bad_cast(); 1015 1016 if (__cm_ & ios_base::out) { 1017 if (this->pptr() != this->pbase()) 1018 if (overflow() == traits_type::eof()) 1019 return -1; 1020 codecvt_base::result __r; 1021 do { 1022 char* __extbe; 1023 __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe); 1024 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 1025 if (std::fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 1026 return -1; 1027 } while (__r == codecvt_base::partial); 1028 if (__r == codecvt_base::error) 1029 return -1; 1030 if (std::fflush(__file_)) 1031 return -1; 1032 } else if (__cm_ & ios_base::in) { 1033 off_type __c; 1034 state_type __state = __st_last_; 1035 bool __update_st = false; 1036 if (__always_noconv_) 1037 __c = this->egptr() - this->gptr(); 1038 else { 1039 int __width = __cv_->encoding(); 1040 __c = __extbufend_ - __extbufnext_; 1041 if (__width > 0) 1042 __c += __width * (this->egptr() - this->gptr()); 1043 else { 1044 if (this->gptr() != this->egptr()) { 1045 const int __off = __cv_->length(__state, __extbuf_, __extbufnext_, this->gptr() - this->eback()); 1046 __c += __extbufnext_ - __extbuf_ - __off; 1047 __update_st = true; 1048 } 1049 } 1050 } 1051 if (__fseek(__file_, -__c, SEEK_CUR)) 1052 return -1; 1053 if (__update_st) 1054 __st_ = __state; 1055 __extbufnext_ = __extbufend_ = __extbuf_; 1056 this->setg(nullptr, nullptr, nullptr); 1057 __cm_ = 0; 1058 } 1059 return 0; 1060} 1061 1062template <class _CharT, class _Traits> 1063void basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc) { 1064 sync(); 1065 __cv_ = std::addressof(std::use_facet<codecvt<char_type, char, state_type> >(__loc)); 1066 bool __old_anc = __always_noconv_; 1067 __always_noconv_ = __cv_->always_noconv(); 1068 if (__old_anc != __always_noconv_) { 1069 this->setg(nullptr, nullptr, nullptr); 1070 this->setp(nullptr, nullptr); 1071 // invariant, char_type is char, else we couldn't get here 1072 if (__always_noconv_) // need to dump __intbuf_ 1073 { 1074 if (__owns_eb_) 1075 delete[] __extbuf_; 1076 __owns_eb_ = __owns_ib_; 1077 __ebs_ = __ibs_; 1078 __extbuf_ = (char*)__intbuf_; 1079 __ibs_ = 0; 1080 __intbuf_ = nullptr; 1081 __owns_ib_ = false; 1082 } else // need to obtain an __intbuf_. 1083 { // If __extbuf_ is user-supplied, use it, else new __intbuf_ 1084 if (!__owns_eb_ && __extbuf_ != __extbuf_min_) { 1085 __ibs_ = __ebs_; 1086 __intbuf_ = (char_type*)__extbuf_; 1087 __owns_ib_ = false; 1088 __extbuf_ = new char[__ebs_]; 1089 __owns_eb_ = true; 1090 } else { 1091 __ibs_ = __ebs_; 1092 __intbuf_ = new char_type[__ibs_]; 1093 __owns_ib_ = true; 1094 } 1095 } 1096 } 1097} 1098 1099template <class _CharT, class _Traits> 1100bool basic_filebuf<_CharT, _Traits>::__read_mode() { 1101 if (!(__cm_ & ios_base::in)) { 1102 this->setp(nullptr, nullptr); 1103 if (__always_noconv_) 1104 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_ + __ebs_, (char_type*)__extbuf_ + __ebs_); 1105 else 1106 this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_); 1107 __cm_ = ios_base::in; 1108 return true; 1109 } 1110 return false; 1111} 1112 1113template <class _CharT, class _Traits> 1114void basic_filebuf<_CharT, _Traits>::__write_mode() { 1115 if (!(__cm_ & ios_base::out)) { 1116 this->setg(nullptr, nullptr, nullptr); 1117 if (__ebs_ > sizeof(__extbuf_min_)) { 1118 if (__always_noconv_) 1119 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__ebs_ - 1)); 1120 else 1121 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1)); 1122 } else 1123 this->setp(nullptr, nullptr); 1124 __cm_ = ios_base::out; 1125 } 1126} 1127 1128// basic_ifstream 1129 1130template <class _CharT, class _Traits> 1131class basic_ifstream : public basic_istream<_CharT, _Traits> { 1132public: 1133 typedef _CharT char_type; 1134 typedef _Traits traits_type; 1135 typedef typename traits_type::int_type int_type; 1136 typedef typename traits_type::pos_type pos_type; 1137 typedef typename traits_type::off_type off_type; 1138# if _LIBCPP_STD_VER >= 26 1139 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1140# endif 1141 1142 _LIBCPP_HIDE_FROM_ABI basic_ifstream(); 1143 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in); 1144# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1145 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1146# endif 1147 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in); 1148# if _LIBCPP_STD_VER >= 17 1149 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1150 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY 1151 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const _Tp& __p, ios_base::openmode __mode = ios_base::in) 1152 : basic_ifstream(__p.c_str(), __mode) {} 1153# endif // _LIBCPP_STD_VER >= 17 1154 _LIBCPP_HIDE_FROM_ABI basic_ifstream(basic_ifstream&& __rhs); 1155 _LIBCPP_HIDE_FROM_ABI basic_ifstream& operator=(basic_ifstream&& __rhs); 1156 _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream& __rhs); 1157 1158 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1159# if _LIBCPP_STD_VER >= 26 1160 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1161# endif 1162 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1163 void open(const char* __s, ios_base::openmode __mode = ios_base::in); 1164# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1165 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1166# endif 1167 void open(const string& __s, ios_base::openmode __mode = ios_base::in); 1168# if _LIBCPP_STD_VER >= 17 1169 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1170 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in) { 1171 return open(__p.c_str(), __mode); 1172 } 1173# endif // _LIBCPP_STD_VER >= 17 1174 1175 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1176 _LIBCPP_HIDE_FROM_ABI void close(); 1177 1178private: 1179 basic_filebuf<char_type, traits_type> __sb_; 1180}; 1181 1182template <class _CharT, class _Traits> 1183inline basic_ifstream<_CharT, _Traits>::basic_ifstream() 1184 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) {} 1185 1186template <class _CharT, class _Traits> 1187inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode) 1188 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1189 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1190 this->setstate(ios_base::failbit); 1191} 1192 1193# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1194template <class _CharT, class _Traits> 1195inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode) 1196 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1197 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1198 this->setstate(ios_base::failbit); 1199} 1200# endif 1201 1202// extension 1203template <class _CharT, class _Traits> 1204inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode) 1205 : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { 1206 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1207 this->setstate(ios_base::failbit); 1208} 1209 1210template <class _CharT, class _Traits> 1211inline basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs) 1212 : basic_istream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1213 this->set_rdbuf(std::addressof(__sb_)); 1214} 1215 1216template <class _CharT, class _Traits> 1217inline basic_ifstream<_CharT, _Traits>& basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs) { 1218 basic_istream<char_type, traits_type>::operator=(std::move(__rhs)); 1219 __sb_ = std::move(__rhs.__sb_); 1220 return *this; 1221} 1222 1223template <class _CharT, class _Traits> 1224inline void basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs) { 1225 basic_istream<char_type, traits_type>::swap(__rhs); 1226 __sb_.swap(__rhs.__sb_); 1227} 1228 1229template <class _CharT, class _Traits> 1230inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y) { 1231 __x.swap(__y); 1232} 1233 1234template <class _CharT, class _Traits> 1235inline basic_filebuf<_CharT, _Traits>* basic_ifstream<_CharT, _Traits>::rdbuf() const { 1236 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1237} 1238 1239template <class _CharT, class _Traits> 1240inline bool basic_ifstream<_CharT, _Traits>::is_open() const { 1241 return __sb_.is_open(); 1242} 1243 1244template <class _CharT, class _Traits> 1245void basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1246 if (__sb_.open(__s, __mode | ios_base::in)) 1247 this->clear(); 1248 else 1249 this->setstate(ios_base::failbit); 1250} 1251 1252# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1253template <class _CharT, class _Traits> 1254void basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1255 if (__sb_.open(__s, __mode | ios_base::in)) 1256 this->clear(); 1257 else 1258 this->setstate(ios_base::failbit); 1259} 1260# endif 1261 1262template <class _CharT, class _Traits> 1263void basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1264 if (__sb_.open(__s, __mode | ios_base::in)) 1265 this->clear(); 1266 else 1267 this->setstate(ios_base::failbit); 1268} 1269 1270template <class _CharT, class _Traits> 1271inline void basic_ifstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1272 if (__sb_.__open(__fd, __mode | ios_base::in)) 1273 this->clear(); 1274 else 1275 this->setstate(ios_base::failbit); 1276} 1277 1278template <class _CharT, class _Traits> 1279inline void basic_ifstream<_CharT, _Traits>::close() { 1280 if (__sb_.close() == 0) 1281 this->setstate(ios_base::failbit); 1282} 1283 1284// basic_ofstream 1285 1286template <class _CharT, class _Traits> 1287class basic_ofstream : public basic_ostream<_CharT, _Traits> { 1288public: 1289 typedef _CharT char_type; 1290 typedef _Traits traits_type; 1291 typedef typename traits_type::int_type int_type; 1292 typedef typename traits_type::pos_type pos_type; 1293 typedef typename traits_type::off_type off_type; 1294# if _LIBCPP_STD_VER >= 26 1295 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1296# endif 1297 1298 _LIBCPP_HIDE_FROM_ABI basic_ofstream(); 1299 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out); 1300# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1301 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1302# endif 1303 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out); 1304 1305# if _LIBCPP_STD_VER >= 17 1306 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1307 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY 1308 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const _Tp& __p, ios_base::openmode __mode = ios_base::out) 1309 : basic_ofstream(__p.c_str(), __mode) {} 1310# endif // _LIBCPP_STD_VER >= 17 1311 1312 _LIBCPP_HIDE_FROM_ABI basic_ofstream(basic_ofstream&& __rhs); 1313 _LIBCPP_HIDE_FROM_ABI basic_ofstream& operator=(basic_ofstream&& __rhs); 1314 _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream& __rhs); 1315 1316 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1317# if _LIBCPP_STD_VER >= 26 1318 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1319# endif 1320 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1321 void open(const char* __s, ios_base::openmode __mode = ios_base::out); 1322# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1323 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1324# endif 1325 void open(const string& __s, ios_base::openmode __mode = ios_base::out); 1326 1327# if _LIBCPP_STD_VER >= 17 1328 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1329 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out) { 1330 return open(__p.c_str(), __mode); 1331 } 1332# endif // _LIBCPP_STD_VER >= 17 1333 1334 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1335 _LIBCPP_HIDE_FROM_ABI void close(); 1336 1337private: 1338 basic_filebuf<char_type, traits_type> __sb_; 1339}; 1340 1341template <class _CharT, class _Traits> 1342inline basic_ofstream<_CharT, _Traits>::basic_ofstream() 1343 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) {} 1344 1345template <class _CharT, class _Traits> 1346inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode) 1347 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1348 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1349 this->setstate(ios_base::failbit); 1350} 1351 1352# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1353template <class _CharT, class _Traits> 1354inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode) 1355 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1356 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1357 this->setstate(ios_base::failbit); 1358} 1359# endif 1360 1361// extension 1362template <class _CharT, class _Traits> 1363inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode) 1364 : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { 1365 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1366 this->setstate(ios_base::failbit); 1367} 1368 1369template <class _CharT, class _Traits> 1370inline basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs) 1371 : basic_ostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1372 this->set_rdbuf(std::addressof(__sb_)); 1373} 1374 1375template <class _CharT, class _Traits> 1376inline basic_ofstream<_CharT, _Traits>& basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs) { 1377 basic_ostream<char_type, traits_type>::operator=(std::move(__rhs)); 1378 __sb_ = std::move(__rhs.__sb_); 1379 return *this; 1380} 1381 1382template <class _CharT, class _Traits> 1383inline void basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs) { 1384 basic_ostream<char_type, traits_type>::swap(__rhs); 1385 __sb_.swap(__rhs.__sb_); 1386} 1387 1388template <class _CharT, class _Traits> 1389inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y) { 1390 __x.swap(__y); 1391} 1392 1393template <class _CharT, class _Traits> 1394inline basic_filebuf<_CharT, _Traits>* basic_ofstream<_CharT, _Traits>::rdbuf() const { 1395 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1396} 1397 1398template <class _CharT, class _Traits> 1399inline bool basic_ofstream<_CharT, _Traits>::is_open() const { 1400 return __sb_.is_open(); 1401} 1402 1403template <class _CharT, class _Traits> 1404void basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1405 if (__sb_.open(__s, __mode | ios_base::out)) 1406 this->clear(); 1407 else 1408 this->setstate(ios_base::failbit); 1409} 1410 1411# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1412template <class _CharT, class _Traits> 1413void basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1414 if (__sb_.open(__s, __mode | ios_base::out)) 1415 this->clear(); 1416 else 1417 this->setstate(ios_base::failbit); 1418} 1419# endif 1420 1421template <class _CharT, class _Traits> 1422void basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1423 if (__sb_.open(__s, __mode | ios_base::out)) 1424 this->clear(); 1425 else 1426 this->setstate(ios_base::failbit); 1427} 1428 1429template <class _CharT, class _Traits> 1430inline void basic_ofstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1431 if (__sb_.__open(__fd, __mode | ios_base::out)) 1432 this->clear(); 1433 else 1434 this->setstate(ios_base::failbit); 1435} 1436 1437template <class _CharT, class _Traits> 1438inline void basic_ofstream<_CharT, _Traits>::close() { 1439 if (__sb_.close() == nullptr) 1440 this->setstate(ios_base::failbit); 1441} 1442 1443// basic_fstream 1444 1445template <class _CharT, class _Traits> 1446class basic_fstream : public basic_iostream<_CharT, _Traits> { 1447public: 1448 typedef _CharT char_type; 1449 typedef _Traits traits_type; 1450 typedef typename traits_type::int_type int_type; 1451 typedef typename traits_type::pos_type pos_type; 1452 typedef typename traits_type::off_type off_type; 1453# if _LIBCPP_STD_VER >= 26 1454 using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; 1455# endif 1456 1457 _LIBCPP_HIDE_FROM_ABI basic_fstream(); 1458 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const char* __s, 1459 ios_base::openmode __mode = ios_base::in | ios_base::out); 1460# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1461 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const wchar_t* __s, 1462 ios_base::openmode __mode = ios_base::in | ios_base::out); 1463# endif 1464 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const string& __s, 1465 ios_base::openmode __mode = ios_base::in | ios_base::out); 1466 1467# if _LIBCPP_STD_VER >= 17 1468 template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> 1469 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI explicit basic_fstream( 1470 const _Tp& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) 1471 : basic_fstream(__p.c_str(), __mode) {} 1472# endif // _LIBCPP_STD_VER >= 17 1473 1474 _LIBCPP_HIDE_FROM_ABI basic_fstream(basic_fstream&& __rhs); 1475 1476 _LIBCPP_HIDE_FROM_ABI basic_fstream& operator=(basic_fstream&& __rhs); 1477 1478 _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream& __rhs); 1479 1480 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1481# if _LIBCPP_STD_VER >= 26 1482 _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { return rdbuf()->native_handle(); } 1483# endif 1484 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1485 _LIBCPP_HIDE_FROM_ABI void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1486# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1487 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1488# endif 1489 _LIBCPP_HIDE_FROM_ABI void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1490 1491# if _LIBCPP_STD_VER >= 17 1492 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_HIDE_FROM_ABI void 1493 open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) { 1494 return open(__p.c_str(), __mode); 1495 } 1496# endif // _LIBCPP_STD_VER >= 17 1497 1498 _LIBCPP_HIDE_FROM_ABI void close(); 1499 1500private: 1501 basic_filebuf<char_type, traits_type> __sb_; 1502}; 1503 1504template <class _CharT, class _Traits> 1505inline basic_fstream<_CharT, _Traits>::basic_fstream() 1506 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) {} 1507 1508template <class _CharT, class _Traits> 1509inline basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode) 1510 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1511 if (__sb_.open(__s, __mode) == nullptr) 1512 this->setstate(ios_base::failbit); 1513} 1514 1515# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1516template <class _CharT, class _Traits> 1517inline basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode) 1518 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1519 if (__sb_.open(__s, __mode) == nullptr) 1520 this->setstate(ios_base::failbit); 1521} 1522# endif 1523 1524template <class _CharT, class _Traits> 1525inline basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode) 1526 : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { 1527 if (__sb_.open(__s, __mode) == nullptr) 1528 this->setstate(ios_base::failbit); 1529} 1530 1531// extension 1532template <class _CharT, class _Traits> 1533inline basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs) 1534 : basic_iostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1535 this->set_rdbuf(std::addressof(__sb_)); 1536} 1537 1538template <class _CharT, class _Traits> 1539inline basic_fstream<_CharT, _Traits>& basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs) { 1540 basic_iostream<char_type, traits_type>::operator=(std::move(__rhs)); 1541 __sb_ = std::move(__rhs.__sb_); 1542 return *this; 1543} 1544 1545template <class _CharT, class _Traits> 1546inline void basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs) { 1547 basic_iostream<char_type, traits_type>::swap(__rhs); 1548 __sb_.swap(__rhs.__sb_); 1549} 1550 1551template <class _CharT, class _Traits> 1552inline _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y) { 1553 __x.swap(__y); 1554} 1555 1556template <class _CharT, class _Traits> 1557inline basic_filebuf<_CharT, _Traits>* basic_fstream<_CharT, _Traits>::rdbuf() const { 1558 return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); 1559} 1560 1561template <class _CharT, class _Traits> 1562inline bool basic_fstream<_CharT, _Traits>::is_open() const { 1563 return __sb_.is_open(); 1564} 1565 1566template <class _CharT, class _Traits> 1567void basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1568 if (__sb_.open(__s, __mode)) 1569 this->clear(); 1570 else 1571 this->setstate(ios_base::failbit); 1572} 1573 1574# if _LIBCPP_HAS_OPEN_WITH_WCHAR 1575template <class _CharT, class _Traits> 1576void basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1577 if (__sb_.open(__s, __mode)) 1578 this->clear(); 1579 else 1580 this->setstate(ios_base::failbit); 1581} 1582# endif 1583 1584template <class _CharT, class _Traits> 1585void basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1586 if (__sb_.open(__s, __mode)) 1587 this->clear(); 1588 else 1589 this->setstate(ios_base::failbit); 1590} 1591 1592template <class _CharT, class _Traits> 1593inline void basic_fstream<_CharT, _Traits>::close() { 1594 if (__sb_.close() == nullptr) 1595 this->setstate(ios_base::failbit); 1596} 1597 1598# if _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 1599extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>; 1600extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>; 1601extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>; 1602# endif 1603 1604_LIBCPP_END_NAMESPACE_STD 1605 1606_LIBCPP_POP_MACROS 1607 1608# endif // _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION 1609 1610# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1611# include <atomic> 1612# include <concepts> 1613# include <cstdlib> 1614# include <iosfwd> 1615# include <limits> 1616# include <mutex> 1617# include <new> 1618# include <stdexcept> 1619# include <type_traits> 1620# endif 1621 1622# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23 1623# include <filesystem> 1624# endif 1625#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 1626 1627#endif // _LIBCPP_FSTREAM 1628