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 77 basic_ifstream(); 78 explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in); 79 explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in); 80 explicit basic_ifstream(const filesystem::path& p, 81 ios_base::openmode mode = ios_base::in); // C++17 82 basic_ifstream(basic_ifstream&& rhs); 83 84 basic_ifstream& operator=(basic_ifstream&& rhs); 85 void swap(basic_ifstream& rhs); 86 87 basic_filebuf<char_type, traits_type>* rdbuf() const; 88 bool is_open() const; 89 void open(const char* s, ios_base::openmode mode = ios_base::in); 90 void open(const string& s, ios_base::openmode mode = ios_base::in); 91 void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); // C++17 92 93 void close(); 94}; 95 96template <class charT, class traits> 97 void 98 swap(basic_ifstream<charT, traits>& x, basic_ifstream<charT, traits>& y); 99 100typedef basic_ifstream<char> ifstream; 101typedef basic_ifstream<wchar_t> wifstream; 102 103template <class charT, class traits = char_traits<charT> > 104class basic_ofstream 105 : public basic_ostream<charT,traits> 106{ 107public: 108 typedef charT char_type; 109 typedef traits traits_type; 110 typedef typename traits_type::int_type int_type; 111 typedef typename traits_type::pos_type pos_type; 112 typedef typename traits_type::off_type off_type; 113 114 basic_ofstream(); 115 explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out); 116 explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out); 117 explicit basic_ofstream(const filesystem::path& p, 118 ios_base::openmode mode = ios_base::out); // C++17 119 basic_ofstream(basic_ofstream&& rhs); 120 121 basic_ofstream& operator=(basic_ofstream&& rhs); 122 void swap(basic_ofstream& rhs); 123 124 basic_filebuf<char_type, traits_type>* rdbuf() const; 125 bool is_open() const; 126 void open(const char* s, ios_base::openmode mode = ios_base::out); 127 void open(const string& s, ios_base::openmode mode = ios_base::out); 128 void open(const filesystem::path& p, 129 ios_base::openmode mode = ios_base::out); // C++17 130 131 void close(); 132}; 133 134template <class charT, class traits> 135 void 136 swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y); 137 138typedef basic_ofstream<char> ofstream; 139typedef basic_ofstream<wchar_t> wofstream; 140 141template <class charT, class traits=char_traits<charT> > 142class basic_fstream 143 : public basic_iostream<charT,traits> 144{ 145public: 146 typedef charT char_type; 147 typedef traits traits_type; 148 typedef typename traits_type::int_type int_type; 149 typedef typename traits_type::pos_type pos_type; 150 typedef typename traits_type::off_type off_type; 151 152 basic_fstream(); 153 explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 154 explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); 155 explicit basic_fstream(const filesystem::path& p, 156 ios_base::openmode mode = ios_base::in|ios_base::out); C++17 157 basic_fstream(basic_fstream&& rhs); 158 159 basic_fstream& operator=(basic_fstream&& rhs); 160 void swap(basic_fstream& rhs); 161 162 basic_filebuf<char_type, traits_type>* rdbuf() const; 163 bool is_open() const; 164 void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 165 void open(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); 166 void open(const filesystem::path& s, 167 ios_base::openmode mode = ios_base::in|ios_base::out); // C++17 168 169 void close(); 170}; 171 172template <class charT, class traits> 173 void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y); 174 175typedef basic_fstream<char> fstream; 176typedef basic_fstream<wchar_t> wfstream; 177 178} // std 179 180*/ 181 182#include <__algorithm/max.h> 183#include <__assert> // all public C++ headers provide the assertion handler 184#include <__availability> 185#include <__config> 186#include <__locale> 187#include <__utility/move.h> 188#include <__utility/swap.h> 189#include <__utility/unreachable.h> 190#include <cstdio> 191#include <istream> 192#include <ostream> 193#include <typeinfo> 194#include <version> 195 196#if !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 197# include <filesystem> 198#endif 199 200#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 201# pragma GCC system_header 202#endif 203 204_LIBCPP_PUSH_MACROS 205#include <__undef_macros> 206 207#if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION) 208# define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS 209#endif 210 211#if !defined(_LIBCPP_HAS_NO_FSTREAM) 212 213_LIBCPP_BEGIN_NAMESPACE_STD 214 215template <class _CharT, class _Traits> 216class _LIBCPP_TEMPLATE_VIS basic_filebuf 217 : public basic_streambuf<_CharT, _Traits> 218{ 219public: 220 typedef _CharT char_type; 221 typedef _Traits traits_type; 222 typedef typename traits_type::int_type int_type; 223 typedef typename traits_type::pos_type pos_type; 224 typedef typename traits_type::off_type off_type; 225 typedef typename traits_type::state_type state_type; 226 227 // 27.9.1.2 Constructors/destructor: 228 basic_filebuf(); 229 basic_filebuf(basic_filebuf&& __rhs); 230 ~basic_filebuf() override; 231 232 // 27.9.1.3 Assign/swap: 233 _LIBCPP_INLINE_VISIBILITY 234 basic_filebuf& operator=(basic_filebuf&& __rhs); 235 void swap(basic_filebuf& __rhs); 236 237 // 27.9.1.4 Members: 238 _LIBCPP_INLINE_VISIBILITY 239 bool is_open() const; 240 basic_filebuf* open(const char* __s, ios_base::openmode __mode); 241#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 242 basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode); 243#endif 244 _LIBCPP_INLINE_VISIBILITY 245 basic_filebuf* open(const string& __s, ios_base::openmode __mode); 246 247#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 248 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 249 basic_filebuf* open(const _VSTD_FS::path& __p, ios_base::openmode __mode) { 250 return open(__p.c_str(), __mode); 251 } 252#endif 253 _LIBCPP_INLINE_VISIBILITY 254 basic_filebuf* __open(int __fd, ios_base::openmode __mode); 255 basic_filebuf* close(); 256 257 _LIBCPP_INLINE_VISIBILITY 258 inline static const char* 259 __make_mdstring(ios_base::openmode __mode) _NOEXCEPT; 260 261 protected: 262 // 27.9.1.5 Overridden virtual functions: 263 int_type underflow() override; 264 int_type pbackfail(int_type __c = traits_type::eof()) override; 265 int_type overflow (int_type __c = traits_type::eof()) override; 266 basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n) override; 267 pos_type seekoff(off_type __off, ios_base::seekdir __way, 268 ios_base::openmode __wch = ios_base::in | ios_base::out) override; 269 pos_type seekpos(pos_type __sp, 270 ios_base::openmode __wch = ios_base::in | ios_base::out) override; 271 int sync() override; 272 void imbue(const locale& __loc) override; 273 274private: 275 char* __extbuf_; 276 const char* __extbufnext_; 277 const char* __extbufend_; 278 char __extbuf_min_[8]; 279 size_t __ebs_; 280 char_type* __intbuf_; 281 size_t __ibs_; 282 FILE* __file_; 283 const codecvt<char_type, char, state_type>* __cv_; 284 state_type __st_; 285 state_type __st_last_; 286 ios_base::openmode __om_; 287 ios_base::openmode __cm_; 288 bool __owns_eb_; 289 bool __owns_ib_; 290 bool __always_noconv_; 291 292 bool __read_mode(); 293 void __write_mode(); 294}; 295 296template <class _CharT, class _Traits> 297basic_filebuf<_CharT, _Traits>::basic_filebuf() 298 : __extbuf_(nullptr), 299 __extbufnext_(nullptr), 300 __extbufend_(nullptr), 301 __ebs_(0), 302 __intbuf_(nullptr), 303 __ibs_(0), 304 __file_(nullptr), 305 __cv_(nullptr), 306 __st_(), 307 __st_last_(), 308 __om_(0), 309 __cm_(0), 310 __owns_eb_(false), 311 __owns_ib_(false), 312 __always_noconv_(false) 313{ 314 if (std::has_facet<codecvt<char_type, char, state_type> >(this->getloc())) 315 { 316 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(this->getloc()); 317 __always_noconv_ = __cv_->always_noconv(); 318 } 319 setbuf(nullptr, 4096); 320} 321 322template <class _CharT, class _Traits> 323basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs) 324 : basic_streambuf<_CharT, _Traits>(__rhs) 325{ 326 if (__rhs.__extbuf_ == __rhs.__extbuf_min_) 327 { 328 __extbuf_ = __extbuf_min_; 329 __extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_); 330 __extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_); 331 } 332 else 333 { 334 __extbuf_ = __rhs.__extbuf_; 335 __extbufnext_ = __rhs.__extbufnext_; 336 __extbufend_ = __rhs.__extbufend_; 337 } 338 __ebs_ = __rhs.__ebs_; 339 __intbuf_ = __rhs.__intbuf_; 340 __ibs_ = __rhs.__ibs_; 341 __file_ = __rhs.__file_; 342 __cv_ = __rhs.__cv_; 343 __st_ = __rhs.__st_; 344 __st_last_ = __rhs.__st_last_; 345 __om_ = __rhs.__om_; 346 __cm_ = __rhs.__cm_; 347 __owns_eb_ = __rhs.__owns_eb_; 348 __owns_ib_ = __rhs.__owns_ib_; 349 __always_noconv_ = __rhs.__always_noconv_; 350 if (__rhs.pbase()) 351 { 352 if (__rhs.pbase() == __rhs.__intbuf_) 353 this->setp(__intbuf_, __intbuf_ + (__rhs. epptr() - __rhs.pbase())); 354 else 355 this->setp((char_type*)__extbuf_, 356 (char_type*)__extbuf_ + (__rhs. epptr() - __rhs.pbase())); 357 this->__pbump(__rhs. pptr() - __rhs.pbase()); 358 } 359 else if (__rhs.eback()) 360 { 361 if (__rhs.eback() == __rhs.__intbuf_) 362 this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()), 363 __intbuf_ + (__rhs.egptr() - __rhs.eback())); 364 else 365 this->setg((char_type*)__extbuf_, 366 (char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()), 367 (char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback())); 368 } 369 __rhs.__extbuf_ = nullptr; 370 __rhs.__extbufnext_ = nullptr; 371 __rhs.__extbufend_ = nullptr; 372 __rhs.__ebs_ = 0; 373 __rhs.__intbuf_ = 0; 374 __rhs.__ibs_ = 0; 375 __rhs.__file_ = nullptr; 376 __rhs.__st_ = state_type(); 377 __rhs.__st_last_ = state_type(); 378 __rhs.__om_ = 0; 379 __rhs.__cm_ = 0; 380 __rhs.__owns_eb_ = false; 381 __rhs.__owns_ib_ = false; 382 __rhs.setg(0, 0, 0); 383 __rhs.setp(0, 0); 384} 385 386template <class _CharT, class _Traits> 387inline 388basic_filebuf<_CharT, _Traits>& 389basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs) 390{ 391 close(); 392 swap(__rhs); 393 return *this; 394} 395 396template <class _CharT, class _Traits> 397basic_filebuf<_CharT, _Traits>::~basic_filebuf() 398{ 399#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 400 try 401 { 402#endif // _LIBCPP_HAS_NO_EXCEPTIONS 403 close(); 404#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 405 } 406 catch (...) 407 { 408 } 409#endif // _LIBCPP_HAS_NO_EXCEPTIONS 410 if (__owns_eb_) 411 delete [] __extbuf_; 412 if (__owns_ib_) 413 delete [] __intbuf_; 414} 415 416template <class _CharT, class _Traits> 417void 418basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs) 419{ 420 basic_streambuf<char_type, traits_type>::swap(__rhs); 421 if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) 422 { 423 // Neither *this nor __rhs uses the small buffer, so we can simply swap the pointers. 424 std::swap(__extbuf_, __rhs.__extbuf_); 425 std::swap(__extbufnext_, __rhs.__extbufnext_); 426 std::swap(__extbufend_, __rhs.__extbufend_); 427 } 428 else 429 { 430 ptrdiff_t __ln = __extbufnext_ ? __extbufnext_ - __extbuf_ : 0; 431 ptrdiff_t __le = __extbufend_ ? __extbufend_ - __extbuf_ : 0; 432 ptrdiff_t __rn = __rhs.__extbufnext_ ? __rhs.__extbufnext_ - __rhs.__extbuf_ : 0; 433 ptrdiff_t __re = __rhs.__extbufend_ ? __rhs.__extbufend_ - __rhs.__extbuf_ : 0; 434 if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) 435 { 436 // *this uses the small buffer, but __rhs doesn't. 437 __extbuf_ = __rhs.__extbuf_; 438 __rhs.__extbuf_ = __rhs.__extbuf_min_; 439 std::memmove(__rhs.__extbuf_min_, __extbuf_min_, sizeof(__extbuf_min_)); 440 } 441 else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_) 442 { 443 // *this doesn't use the small buffer, but __rhs does. 444 __rhs.__extbuf_ = __extbuf_; 445 __extbuf_ = __extbuf_min_; 446 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 447 } 448 else 449 { 450 // Both *this and __rhs use the small buffer. 451 char __tmp[sizeof(__extbuf_min_)]; 452 std::memmove(__tmp, __extbuf_min_, sizeof(__extbuf_min_)); 453 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 454 std::memmove(__rhs.__extbuf_min_, __tmp, sizeof(__extbuf_min_)); 455 } 456 __extbufnext_ = __extbuf_ + __rn; 457 __extbufend_ = __extbuf_ + __re; 458 __rhs.__extbufnext_ = __rhs.__extbuf_ + __ln; 459 __rhs.__extbufend_ = __rhs.__extbuf_ + __le; 460 } 461 _VSTD::swap(__ebs_, __rhs.__ebs_); 462 _VSTD::swap(__intbuf_, __rhs.__intbuf_); 463 _VSTD::swap(__ibs_, __rhs.__ibs_); 464 _VSTD::swap(__file_, __rhs.__file_); 465 _VSTD::swap(__cv_, __rhs.__cv_); 466 _VSTD::swap(__st_, __rhs.__st_); 467 _VSTD::swap(__st_last_, __rhs.__st_last_); 468 _VSTD::swap(__om_, __rhs.__om_); 469 _VSTD::swap(__cm_, __rhs.__cm_); 470 _VSTD::swap(__owns_eb_, __rhs.__owns_eb_); 471 _VSTD::swap(__owns_ib_, __rhs.__owns_ib_); 472 _VSTD::swap(__always_noconv_, __rhs.__always_noconv_); 473 if (this->eback() == (char_type*)__rhs.__extbuf_min_) 474 { 475 ptrdiff_t __n = this->gptr() - this->eback(); 476 ptrdiff_t __e = this->egptr() - this->eback(); 477 this->setg((char_type*)__extbuf_min_, 478 (char_type*)__extbuf_min_ + __n, 479 (char_type*)__extbuf_min_ + __e); 480 } 481 else if (this->pbase() == (char_type*)__rhs.__extbuf_min_) 482 { 483 ptrdiff_t __n = this->pptr() - this->pbase(); 484 ptrdiff_t __e = this->epptr() - this->pbase(); 485 this->setp((char_type*)__extbuf_min_, 486 (char_type*)__extbuf_min_ + __e); 487 this->__pbump(__n); 488 } 489 if (__rhs.eback() == (char_type*)__extbuf_min_) 490 { 491 ptrdiff_t __n = __rhs.gptr() - __rhs.eback(); 492 ptrdiff_t __e = __rhs.egptr() - __rhs.eback(); 493 __rhs.setg((char_type*)__rhs.__extbuf_min_, 494 (char_type*)__rhs.__extbuf_min_ + __n, 495 (char_type*)__rhs.__extbuf_min_ + __e); 496 } 497 else if (__rhs.pbase() == (char_type*)__extbuf_min_) 498 { 499 ptrdiff_t __n = __rhs.pptr() - __rhs.pbase(); 500 ptrdiff_t __e = __rhs.epptr() - __rhs.pbase(); 501 __rhs.setp((char_type*)__rhs.__extbuf_min_, 502 (char_type*)__rhs.__extbuf_min_ + __e); 503 __rhs.__pbump(__n); 504 } 505} 506 507template <class _CharT, class _Traits> 508inline _LIBCPP_INLINE_VISIBILITY 509void 510swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y) 511{ 512 __x.swap(__y); 513} 514 515template <class _CharT, class _Traits> 516inline 517bool 518basic_filebuf<_CharT, _Traits>::is_open() const 519{ 520 return __file_ != nullptr; 521} 522 523template <class _CharT, class _Traits> 524const char* basic_filebuf<_CharT, _Traits>::__make_mdstring( 525 ios_base::openmode __mode) _NOEXCEPT { 526 switch (__mode & ~ios_base::ate) { 527 case ios_base::out: 528 case ios_base::out | ios_base::trunc: 529 return "w" _LIBCPP_FOPEN_CLOEXEC_MODE; 530 case ios_base::out | ios_base::app: 531 case ios_base::app: 532 return "a" _LIBCPP_FOPEN_CLOEXEC_MODE; 533 case ios_base::in: 534 return "r" _LIBCPP_FOPEN_CLOEXEC_MODE; 535 case ios_base::in | ios_base::out: 536 return "r+" _LIBCPP_FOPEN_CLOEXEC_MODE; 537 case ios_base::in | ios_base::out | ios_base::trunc: 538 return "w+" _LIBCPP_FOPEN_CLOEXEC_MODE; 539 case ios_base::in | ios_base::out | ios_base::app: 540 case ios_base::in | ios_base::app: 541 return "a+" _LIBCPP_FOPEN_CLOEXEC_MODE; 542 case ios_base::out | ios_base::binary: 543 case ios_base::out | ios_base::trunc | ios_base::binary: 544 return "wb" _LIBCPP_FOPEN_CLOEXEC_MODE; 545 case ios_base::out | ios_base::app | ios_base::binary: 546 case ios_base::app | ios_base::binary: 547 return "ab" _LIBCPP_FOPEN_CLOEXEC_MODE; 548 case ios_base::in | ios_base::binary: 549 return "rb" _LIBCPP_FOPEN_CLOEXEC_MODE; 550 case ios_base::in | ios_base::out | ios_base::binary: 551 return "r+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 552 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 553 return "w+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 554 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 555 case ios_base::in | ios_base::app | ios_base::binary: 556 return "a+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 557 default: 558 return nullptr; 559 } 560 __libcpp_unreachable(); 561} 562 563template <class _CharT, class _Traits> 564basic_filebuf<_CharT, _Traits>* 565basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) 566{ 567 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 568 if (__file_ == nullptr) 569 { 570 if (const char* __mdstr = __make_mdstring(__mode)) { 571 __rt = this; 572 __file_ = fopen(__s, __mdstr); 573 if (__file_) { 574 __om_ = __mode; 575 if (__mode & ios_base::ate) { 576 if (fseek(__file_, 0, SEEK_END)) { 577 fclose(__file_); 578 __file_ = nullptr; 579 __rt = nullptr; 580 } 581 } 582 } else 583 __rt = nullptr; 584 } 585 } 586 return __rt; 587} 588 589template <class _CharT, class _Traits> 590inline 591basic_filebuf<_CharT, _Traits>* 592basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 593 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 594 if (__file_ == nullptr) { 595 if (const char* __mdstr = __make_mdstring(__mode)) { 596 __rt = this; 597 __file_ = fdopen(__fd, __mdstr); 598 if (__file_) { 599 __om_ = __mode; 600 if (__mode & ios_base::ate) { 601 if (fseek(__file_, 0, SEEK_END)) { 602 fclose(__file_); 603 __file_ = nullptr; 604 __rt = nullptr; 605 } 606 } 607 } else 608 __rt = nullptr; 609 } 610 } 611 return __rt; 612} 613 614#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 615// This is basically the same as the char* overload except that it uses _wfopen 616// and long mode strings. 617template <class _CharT, class _Traits> 618basic_filebuf<_CharT, _Traits>* 619basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) 620{ 621 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 622 if (__file_ == nullptr) 623 { 624 __rt = this; 625 const wchar_t* __mdstr; 626 switch (__mode & ~ios_base::ate) 627 { 628 case ios_base::out: 629 case ios_base::out | ios_base::trunc: 630 __mdstr = L"w"; 631 break; 632 case ios_base::out | ios_base::app: 633 case ios_base::app: 634 __mdstr = L"a"; 635 break; 636 case ios_base::in: 637 __mdstr = L"r"; 638 break; 639 case ios_base::in | ios_base::out: 640 __mdstr = L"r+"; 641 break; 642 case ios_base::in | ios_base::out | ios_base::trunc: 643 __mdstr = L"w+"; 644 break; 645 case ios_base::in | ios_base::out | ios_base::app: 646 case ios_base::in | ios_base::app: 647 __mdstr = L"a+"; 648 break; 649 case ios_base::out | ios_base::binary: 650 case ios_base::out | ios_base::trunc | ios_base::binary: 651 __mdstr = L"wb"; 652 break; 653 case ios_base::out | ios_base::app | ios_base::binary: 654 case ios_base::app | ios_base::binary: 655 __mdstr = L"ab"; 656 break; 657 case ios_base::in | ios_base::binary: 658 __mdstr = L"rb"; 659 break; 660 case ios_base::in | ios_base::out | ios_base::binary: 661 __mdstr = L"r+b"; 662 break; 663 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 664 __mdstr = L"w+b"; 665 break; 666 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 667 case ios_base::in | ios_base::app | ios_base::binary: 668 __mdstr = L"a+b"; 669 break; 670 default: 671 __rt = nullptr; 672 break; 673 } 674 if (__rt) 675 { 676 __file_ = _wfopen(__s, __mdstr); 677 if (__file_) 678 { 679 __om_ = __mode; 680 if (__mode & ios_base::ate) 681 { 682 if (fseek(__file_, 0, SEEK_END)) 683 { 684 fclose(__file_); 685 __file_ = nullptr; 686 __rt = nullptr; 687 } 688 } 689 } 690 else 691 __rt = nullptr; 692 } 693 } 694 return __rt; 695} 696#endif 697 698template <class _CharT, class _Traits> 699inline 700basic_filebuf<_CharT, _Traits>* 701basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) 702{ 703 return open(__s.c_str(), __mode); 704} 705 706template <class _CharT, class _Traits> 707basic_filebuf<_CharT, _Traits>* 708basic_filebuf<_CharT, _Traits>::close() 709{ 710 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 711 if (__file_) 712 { 713 __rt = this; 714 unique_ptr<FILE, int(*)(FILE*)> __h(__file_, fclose); 715 if (sync()) 716 __rt = nullptr; 717 if (fclose(__h.release())) 718 __rt = nullptr; 719 __file_ = nullptr; 720 setbuf(0, 0); 721 } 722 return __rt; 723} 724 725template <class _CharT, class _Traits> 726typename basic_filebuf<_CharT, _Traits>::int_type 727basic_filebuf<_CharT, _Traits>::underflow() 728{ 729 if (__file_ == nullptr) 730 return traits_type::eof(); 731 bool __initial = __read_mode(); 732 char_type __1buf; 733 if (this->gptr() == nullptr) 734 this->setg(&__1buf, &__1buf+1, &__1buf+1); 735 const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4); 736 int_type __c = traits_type::eof(); 737 if (this->gptr() == this->egptr()) 738 { 739 _VSTD::memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type)); 740 if (__always_noconv_) 741 { 742 size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz); 743 __nmemb = ::fread(this->eback() + __unget_sz, 1, __nmemb, __file_); 744 if (__nmemb != 0) 745 { 746 this->setg(this->eback(), 747 this->eback() + __unget_sz, 748 this->eback() + __unget_sz + __nmemb); 749 __c = traits_type::to_int_type(*this->gptr()); 750 } 751 } 752 else 753 { 754 if (__extbufend_ != __extbufnext_) { 755 _LIBCPP_ASSERT(__extbufnext_ != nullptr, "underflow moving from nullptr"); 756 _LIBCPP_ASSERT(__extbuf_ != nullptr, "underflow moving into nullptr"); 757 _VSTD::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_); 758 } 759 __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_); 760 __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_); 761 size_t __nmemb = _VSTD::min(static_cast<size_t>(__ibs_ - __unget_sz), 762 static_cast<size_t>(__extbufend_ - __extbufnext_)); 763 codecvt_base::result __r; 764 __st_last_ = __st_; 765 size_t __nr = fread((void*) const_cast<char *>(__extbufnext_), 1, __nmemb, __file_); 766 if (__nr != 0) 767 { 768 if (!__cv_) 769 __throw_bad_cast(); 770 771 __extbufend_ = __extbufnext_ + __nr; 772 char_type* __inext; 773 __r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_, 774 this->eback() + __unget_sz, 775 this->eback() + __ibs_, __inext); 776 if (__r == codecvt_base::noconv) 777 { 778 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, 779 (char_type*)const_cast<char *>(__extbufend_)); 780 __c = traits_type::to_int_type(*this->gptr()); 781 } 782 else if (__inext != this->eback() + __unget_sz) 783 { 784 this->setg(this->eback(), this->eback() + __unget_sz, __inext); 785 __c = traits_type::to_int_type(*this->gptr()); 786 } 787 } 788 } 789 } 790 else 791 __c = traits_type::to_int_type(*this->gptr()); 792 if (this->eback() == &__1buf) 793 this->setg(nullptr, nullptr, nullptr); 794 return __c; 795} 796 797template <class _CharT, class _Traits> 798typename basic_filebuf<_CharT, _Traits>::int_type 799basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c) 800{ 801 if (__file_ && this->eback() < this->gptr()) 802 { 803 if (traits_type::eq_int_type(__c, traits_type::eof())) 804 { 805 this->gbump(-1); 806 return traits_type::not_eof(__c); 807 } 808 if ((__om_ & ios_base::out) || 809 traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) 810 { 811 this->gbump(-1); 812 *this->gptr() = traits_type::to_char_type(__c); 813 return __c; 814 } 815 } 816 return traits_type::eof(); 817} 818 819template <class _CharT, class _Traits> 820typename basic_filebuf<_CharT, _Traits>::int_type 821basic_filebuf<_CharT, _Traits>::overflow(int_type __c) 822{ 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 { 831 if (this->pptr() == nullptr) 832 this->setp(&__1buf, &__1buf+1); 833 *this->pptr() = traits_type::to_char_type(__c); 834 this->pbump(1); 835 } 836 if (this->pptr() != this->pbase()) 837 { 838 if (__always_noconv_) 839 { 840 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase()); 841 if (std::fwrite(this->pbase(), sizeof(char_type), __nmemb, __file_) != __nmemb) 842 return traits_type::eof(); 843 } 844 else 845 { 846 char* __extbe = __extbuf_; 847 codecvt_base::result __r; 848 do 849 { 850 if (!__cv_) 851 __throw_bad_cast(); 852 853 const char_type* __e; 854 __r = __cv_->out(__st_, this->pbase(), this->pptr(), __e, 855 __extbuf_, __extbuf_ + __ebs_, __extbe); 856 if (__e == this->pbase()) 857 return traits_type::eof(); 858 if (__r == codecvt_base::noconv) 859 { 860 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase()); 861 if (std::fwrite(this->pbase(), 1, __nmemb, __file_) != __nmemb) 862 return traits_type::eof(); 863 } 864 else if (__r == codecvt_base::ok || __r == codecvt_base::partial) 865 { 866 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 867 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 868 return traits_type::eof(); 869 if (__r == codecvt_base::partial) 870 { 871 this->setp(const_cast<char_type*>(__e), this->pptr()); 872 this->__pbump(this->epptr() - this->pbase()); 873 } 874 } 875 else 876 return traits_type::eof(); 877 } while (__r == codecvt_base::partial); 878 } 879 this->setp(__pb_save, __epb_save); 880 } 881 return traits_type::not_eof(__c); 882} 883 884template <class _CharT, class _Traits> 885basic_streambuf<_CharT, _Traits>* 886basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n) 887{ 888 this->setg(nullptr, nullptr, nullptr); 889 this->setp(nullptr, nullptr); 890 if (__owns_eb_) 891 delete [] __extbuf_; 892 if (__owns_ib_) 893 delete [] __intbuf_; 894 __ebs_ = __n; 895 if (__ebs_ > sizeof(__extbuf_min_)) 896 { 897 if (__always_noconv_ && __s) 898 { 899 __extbuf_ = (char*)__s; 900 __owns_eb_ = false; 901 } 902 else 903 { 904 __extbuf_ = new char[__ebs_]; 905 __owns_eb_ = true; 906 } 907 } 908 else 909 { 910 __extbuf_ = __extbuf_min_; 911 __ebs_ = sizeof(__extbuf_min_); 912 __owns_eb_ = false; 913 } 914 if (!__always_noconv_) 915 { 916 __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_)); 917 if (__s && __ibs_ >= sizeof(__extbuf_min_)) 918 { 919 __intbuf_ = __s; 920 __owns_ib_ = false; 921 } 922 else 923 { 924 __intbuf_ = new char_type[__ibs_]; 925 __owns_ib_ = true; 926 } 927 } 928 else 929 { 930 __ibs_ = 0; 931 __intbuf_ = nullptr; 932 __owns_ib_ = false; 933 } 934 return this; 935} 936 937template <class _CharT, class _Traits> 938typename basic_filebuf<_CharT, _Traits>::pos_type 939basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way, 940 ios_base::openmode) 941{ 942 if (!__cv_) 943 __throw_bad_cast(); 944 945 int __width = __cv_->encoding(); 946 if (__file_ == nullptr || (__width <= 0 && __off != 0) || sync()) 947 return pos_type(off_type(-1)); 948 // __width > 0 || __off == 0 949 int __whence; 950 switch (__way) 951 { 952 case ios_base::beg: 953 __whence = SEEK_SET; 954 break; 955 case ios_base::cur: 956 __whence = SEEK_CUR; 957 break; 958 case ios_base::end: 959 __whence = SEEK_END; 960 break; 961 default: 962 return pos_type(off_type(-1)); 963 } 964#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 965 if (fseek(__file_, __width > 0 ? __width * __off : 0, __whence)) 966 return pos_type(off_type(-1)); 967 pos_type __r = ftell(__file_); 968#else 969 if (::fseeko(__file_, __width > 0 ? __width * __off : 0, __whence)) 970 return pos_type(off_type(-1)); 971 pos_type __r = ftello(__file_); 972#endif 973 __r.state(__st_); 974 return __r; 975} 976 977template <class _CharT, class _Traits> 978typename basic_filebuf<_CharT, _Traits>::pos_type 979basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode) 980{ 981 if (__file_ == nullptr || sync()) 982 return pos_type(off_type(-1)); 983#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 984 if (fseek(__file_, __sp, SEEK_SET)) 985 return pos_type(off_type(-1)); 986#else 987 if (::fseeko(__file_, __sp, SEEK_SET)) 988 return pos_type(off_type(-1)); 989#endif 990 __st_ = __sp.state(); 991 return __sp; 992} 993 994template <class _CharT, class _Traits> 995int 996basic_filebuf<_CharT, _Traits>::sync() 997{ 998 if (__file_ == nullptr) 999 return 0; 1000 if (!__cv_) 1001 __throw_bad_cast(); 1002 1003 if (__cm_ & ios_base::out) 1004 { 1005 if (this->pptr() != this->pbase()) 1006 if (overflow() == traits_type::eof()) 1007 return -1; 1008 codecvt_base::result __r; 1009 do 1010 { 1011 char* __extbe; 1012 __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe); 1013 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 1014 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 1015 return -1; 1016 } while (__r == codecvt_base::partial); 1017 if (__r == codecvt_base::error) 1018 return -1; 1019 if (fflush(__file_)) 1020 return -1; 1021 } 1022 else if (__cm_ & ios_base::in) 1023 { 1024 off_type __c; 1025 state_type __state = __st_last_; 1026 bool __update_st = false; 1027 if (__always_noconv_) 1028 __c = this->egptr() - this->gptr(); 1029 else 1030 { 1031 int __width = __cv_->encoding(); 1032 __c = __extbufend_ - __extbufnext_; 1033 if (__width > 0) 1034 __c += __width * (this->egptr() - this->gptr()); 1035 else 1036 { 1037 if (this->gptr() != this->egptr()) 1038 { 1039 const int __off = __cv_->length(__state, __extbuf_, 1040 __extbufnext_, 1041 this->gptr() - this->eback()); 1042 __c += __extbufnext_ - __extbuf_ - __off; 1043 __update_st = true; 1044 } 1045 } 1046 } 1047#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 1048 if (fseek(__file_, -__c, SEEK_CUR)) 1049 return -1; 1050#else 1051 if (::fseeko(__file_, -__c, SEEK_CUR)) 1052 return -1; 1053#endif 1054 if (__update_st) 1055 __st_ = __state; 1056 __extbufnext_ = __extbufend_ = __extbuf_; 1057 this->setg(nullptr, nullptr, nullptr); 1058 __cm_ = 0; 1059 } 1060 return 0; 1061} 1062 1063template <class _CharT, class _Traits> 1064void 1065basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc) 1066{ 1067 sync(); 1068 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(__loc); 1069 bool __old_anc = __always_noconv_; 1070 __always_noconv_ = __cv_->always_noconv(); 1071 if (__old_anc != __always_noconv_) 1072 { 1073 this->setg(nullptr, nullptr, nullptr); 1074 this->setp(nullptr, nullptr); 1075 // invariant, char_type is char, else we couldn't get here 1076 if (__always_noconv_) // need to dump __intbuf_ 1077 { 1078 if (__owns_eb_) 1079 delete [] __extbuf_; 1080 __owns_eb_ = __owns_ib_; 1081 __ebs_ = __ibs_; 1082 __extbuf_ = (char*)__intbuf_; 1083 __ibs_ = 0; 1084 __intbuf_ = nullptr; 1085 __owns_ib_ = false; 1086 } 1087 else // need to obtain an __intbuf_. 1088 { // If __extbuf_ is user-supplied, use it, else new __intbuf_ 1089 if (!__owns_eb_ && __extbuf_ != __extbuf_min_) 1090 { 1091 __ibs_ = __ebs_; 1092 __intbuf_ = (char_type*)__extbuf_; 1093 __owns_ib_ = false; 1094 __extbuf_ = new char[__ebs_]; 1095 __owns_eb_ = true; 1096 } 1097 else 1098 { 1099 __ibs_ = __ebs_; 1100 __intbuf_ = new char_type[__ibs_]; 1101 __owns_ib_ = true; 1102 } 1103 } 1104 } 1105} 1106 1107template <class _CharT, class _Traits> 1108bool 1109basic_filebuf<_CharT, _Traits>::__read_mode() 1110{ 1111 if (!(__cm_ & ios_base::in)) 1112 { 1113 this->setp(nullptr, nullptr); 1114 if (__always_noconv_) 1115 this->setg((char_type*)__extbuf_, 1116 (char_type*)__extbuf_ + __ebs_, 1117 (char_type*)__extbuf_ + __ebs_); 1118 else 1119 this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_); 1120 __cm_ = ios_base::in; 1121 return true; 1122 } 1123 return false; 1124} 1125 1126template <class _CharT, class _Traits> 1127void 1128basic_filebuf<_CharT, _Traits>::__write_mode() 1129{ 1130 if (!(__cm_ & ios_base::out)) 1131 { 1132 this->setg(nullptr, nullptr, nullptr); 1133 if (__ebs_ > sizeof(__extbuf_min_)) 1134 { 1135 if (__always_noconv_) 1136 this->setp((char_type*)__extbuf_, 1137 (char_type*)__extbuf_ + (__ebs_ - 1)); 1138 else 1139 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1)); 1140 } 1141 else 1142 this->setp(nullptr, nullptr); 1143 __cm_ = ios_base::out; 1144 } 1145} 1146 1147// basic_ifstream 1148 1149template <class _CharT, class _Traits> 1150class _LIBCPP_TEMPLATE_VIS basic_ifstream 1151 : public basic_istream<_CharT, _Traits> 1152{ 1153public: 1154 typedef _CharT char_type; 1155 typedef _Traits traits_type; 1156 typedef typename traits_type::int_type int_type; 1157 typedef typename traits_type::pos_type pos_type; 1158 typedef typename traits_type::off_type off_type; 1159 1160 _LIBCPP_INLINE_VISIBILITY 1161 basic_ifstream(); 1162 _LIBCPP_INLINE_VISIBILITY 1163 explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in); 1164#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1165 _LIBCPP_INLINE_VISIBILITY 1166 explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1167#endif 1168 _LIBCPP_INLINE_VISIBILITY 1169 explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in); 1170#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 1171 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 1172 explicit basic_ifstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in) 1173 : basic_ifstream(__p.c_str(), __mode) {} 1174#endif // _LIBCPP_STD_VER >= 17 1175 _LIBCPP_INLINE_VISIBILITY 1176 basic_ifstream(basic_ifstream&& __rhs); 1177 _LIBCPP_INLINE_VISIBILITY 1178 basic_ifstream& operator=(basic_ifstream&& __rhs); 1179 _LIBCPP_INLINE_VISIBILITY 1180 void swap(basic_ifstream& __rhs); 1181 1182 _LIBCPP_INLINE_VISIBILITY 1183 basic_filebuf<char_type, traits_type>* rdbuf() const; 1184 _LIBCPP_INLINE_VISIBILITY 1185 bool is_open() const; 1186 void open(const char* __s, ios_base::openmode __mode = ios_base::in); 1187#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1188 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1189#endif 1190 void open(const string& __s, ios_base::openmode __mode = ios_base::in); 1191#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 1192 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 1193 void open(const filesystem::path& __p, 1194 ios_base::openmode __mode = ios_base::in) { 1195 return open(__p.c_str(), __mode); 1196 } 1197#endif // _LIBCPP_STD_VER >= 17 1198 1199 _LIBCPP_INLINE_VISIBILITY 1200 void __open(int __fd, ios_base::openmode __mode); 1201 _LIBCPP_INLINE_VISIBILITY 1202 void close(); 1203 1204private: 1205 basic_filebuf<char_type, traits_type> __sb_; 1206}; 1207 1208template <class _CharT, class _Traits> 1209inline 1210basic_ifstream<_CharT, _Traits>::basic_ifstream() 1211 : basic_istream<char_type, traits_type>(&__sb_) 1212{ 1213} 1214 1215template <class _CharT, class _Traits> 1216inline 1217basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode) 1218 : basic_istream<char_type, traits_type>(&__sb_) 1219{ 1220 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1221 this->setstate(ios_base::failbit); 1222} 1223 1224#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1225template <class _CharT, class _Traits> 1226inline 1227basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode) 1228 : basic_istream<char_type, traits_type>(&__sb_) 1229{ 1230 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1231 this->setstate(ios_base::failbit); 1232} 1233#endif 1234 1235template <class _CharT, class _Traits> 1236inline 1237basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode) 1238 : basic_istream<char_type, traits_type>(&__sb_) 1239{ 1240 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1241 this->setstate(ios_base::failbit); 1242} 1243 1244template <class _CharT, class _Traits> 1245inline 1246basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs) 1247 : basic_istream<char_type, traits_type>(_VSTD::move(__rhs)), 1248 __sb_(_VSTD::move(__rhs.__sb_)) 1249{ 1250 this->set_rdbuf(&__sb_); 1251} 1252 1253template <class _CharT, class _Traits> 1254inline 1255basic_ifstream<_CharT, _Traits>& 1256basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs) 1257{ 1258 basic_istream<char_type, traits_type>::operator=(_VSTD::move(__rhs)); 1259 __sb_ = _VSTD::move(__rhs.__sb_); 1260 return *this; 1261} 1262 1263template <class _CharT, class _Traits> 1264inline 1265void 1266basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs) 1267{ 1268 basic_istream<char_type, traits_type>::swap(__rhs); 1269 __sb_.swap(__rhs.__sb_); 1270} 1271 1272template <class _CharT, class _Traits> 1273inline _LIBCPP_INLINE_VISIBILITY 1274void 1275swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y) 1276{ 1277 __x.swap(__y); 1278} 1279 1280template <class _CharT, class _Traits> 1281inline 1282basic_filebuf<_CharT, _Traits>* 1283basic_ifstream<_CharT, _Traits>::rdbuf() const 1284{ 1285 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_); 1286} 1287 1288template <class _CharT, class _Traits> 1289inline 1290bool 1291basic_ifstream<_CharT, _Traits>::is_open() const 1292{ 1293 return __sb_.is_open(); 1294} 1295 1296template <class _CharT, class _Traits> 1297void 1298basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) 1299{ 1300 if (__sb_.open(__s, __mode | ios_base::in)) 1301 this->clear(); 1302 else 1303 this->setstate(ios_base::failbit); 1304} 1305 1306#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1307template <class _CharT, class _Traits> 1308void 1309basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) 1310{ 1311 if (__sb_.open(__s, __mode | ios_base::in)) 1312 this->clear(); 1313 else 1314 this->setstate(ios_base::failbit); 1315} 1316#endif 1317 1318template <class _CharT, class _Traits> 1319void 1320basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) 1321{ 1322 if (__sb_.open(__s, __mode | ios_base::in)) 1323 this->clear(); 1324 else 1325 this->setstate(ios_base::failbit); 1326} 1327 1328template <class _CharT, class _Traits> 1329inline 1330void basic_ifstream<_CharT, _Traits>::__open(int __fd, 1331 ios_base::openmode __mode) { 1332 if (__sb_.__open(__fd, __mode | ios_base::in)) 1333 this->clear(); 1334 else 1335 this->setstate(ios_base::failbit); 1336} 1337 1338template <class _CharT, class _Traits> 1339inline 1340void 1341basic_ifstream<_CharT, _Traits>::close() 1342{ 1343 if (__sb_.close() == 0) 1344 this->setstate(ios_base::failbit); 1345} 1346 1347// basic_ofstream 1348 1349template <class _CharT, class _Traits> 1350class _LIBCPP_TEMPLATE_VIS basic_ofstream 1351 : public basic_ostream<_CharT, _Traits> 1352{ 1353public: 1354 typedef _CharT char_type; 1355 typedef _Traits traits_type; 1356 typedef typename traits_type::int_type int_type; 1357 typedef typename traits_type::pos_type pos_type; 1358 typedef typename traits_type::off_type off_type; 1359 1360 _LIBCPP_INLINE_VISIBILITY 1361 basic_ofstream(); 1362 _LIBCPP_INLINE_VISIBILITY 1363 explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out); 1364#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1365 _LIBCPP_INLINE_VISIBILITY 1366 explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1367#endif 1368 _LIBCPP_INLINE_VISIBILITY 1369 explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out); 1370 1371#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 1372 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 1373 explicit basic_ofstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out) 1374 : basic_ofstream(__p.c_str(), __mode) {} 1375#endif // _LIBCPP_STD_VER >= 17 1376 1377 _LIBCPP_INLINE_VISIBILITY 1378 basic_ofstream(basic_ofstream&& __rhs); 1379 _LIBCPP_INLINE_VISIBILITY 1380 basic_ofstream& operator=(basic_ofstream&& __rhs); 1381 _LIBCPP_INLINE_VISIBILITY 1382 void swap(basic_ofstream& __rhs); 1383 1384 _LIBCPP_INLINE_VISIBILITY 1385 basic_filebuf<char_type, traits_type>* rdbuf() const; 1386 _LIBCPP_INLINE_VISIBILITY 1387 bool is_open() const; 1388 void open(const char* __s, ios_base::openmode __mode = ios_base::out); 1389#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1390 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1391#endif 1392 void open(const string& __s, ios_base::openmode __mode = ios_base::out); 1393 1394#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 1395 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 1396 void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out) 1397 { return open(__p.c_str(), __mode); } 1398#endif // _LIBCPP_STD_VER >= 17 1399 1400 _LIBCPP_INLINE_VISIBILITY 1401 void __open(int __fd, ios_base::openmode __mode); 1402 _LIBCPP_INLINE_VISIBILITY 1403 void close(); 1404 1405private: 1406 basic_filebuf<char_type, traits_type> __sb_; 1407}; 1408 1409template <class _CharT, class _Traits> 1410inline 1411basic_ofstream<_CharT, _Traits>::basic_ofstream() 1412 : basic_ostream<char_type, traits_type>(&__sb_) 1413{ 1414} 1415 1416template <class _CharT, class _Traits> 1417inline 1418basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode) 1419 : basic_ostream<char_type, traits_type>(&__sb_) 1420{ 1421 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1422 this->setstate(ios_base::failbit); 1423} 1424 1425#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1426template <class _CharT, class _Traits> 1427inline 1428basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode) 1429 : basic_ostream<char_type, traits_type>(&__sb_) 1430{ 1431 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1432 this->setstate(ios_base::failbit); 1433} 1434#endif 1435 1436template <class _CharT, class _Traits> 1437inline 1438basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode) 1439 : basic_ostream<char_type, traits_type>(&__sb_) 1440{ 1441 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1442 this->setstate(ios_base::failbit); 1443} 1444 1445template <class _CharT, class _Traits> 1446inline 1447basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs) 1448 : basic_ostream<char_type, traits_type>(_VSTD::move(__rhs)), 1449 __sb_(_VSTD::move(__rhs.__sb_)) 1450{ 1451 this->set_rdbuf(&__sb_); 1452} 1453 1454template <class _CharT, class _Traits> 1455inline 1456basic_ofstream<_CharT, _Traits>& 1457basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs) 1458{ 1459 basic_ostream<char_type, traits_type>::operator=(_VSTD::move(__rhs)); 1460 __sb_ = _VSTD::move(__rhs.__sb_); 1461 return *this; 1462} 1463 1464template <class _CharT, class _Traits> 1465inline 1466void 1467basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs) 1468{ 1469 basic_ostream<char_type, traits_type>::swap(__rhs); 1470 __sb_.swap(__rhs.__sb_); 1471} 1472 1473template <class _CharT, class _Traits> 1474inline _LIBCPP_INLINE_VISIBILITY 1475void 1476swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y) 1477{ 1478 __x.swap(__y); 1479} 1480 1481template <class _CharT, class _Traits> 1482inline 1483basic_filebuf<_CharT, _Traits>* 1484basic_ofstream<_CharT, _Traits>::rdbuf() const 1485{ 1486 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_); 1487} 1488 1489template <class _CharT, class _Traits> 1490inline 1491bool 1492basic_ofstream<_CharT, _Traits>::is_open() const 1493{ 1494 return __sb_.is_open(); 1495} 1496 1497template <class _CharT, class _Traits> 1498void 1499basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) 1500{ 1501 if (__sb_.open(__s, __mode | ios_base::out)) 1502 this->clear(); 1503 else 1504 this->setstate(ios_base::failbit); 1505} 1506 1507#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1508template <class _CharT, class _Traits> 1509void 1510basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) 1511{ 1512 if (__sb_.open(__s, __mode | ios_base::out)) 1513 this->clear(); 1514 else 1515 this->setstate(ios_base::failbit); 1516} 1517#endif 1518 1519template <class _CharT, class _Traits> 1520void 1521basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) 1522{ 1523 if (__sb_.open(__s, __mode | ios_base::out)) 1524 this->clear(); 1525 else 1526 this->setstate(ios_base::failbit); 1527} 1528 1529template <class _CharT, class _Traits> 1530inline 1531void basic_ofstream<_CharT, _Traits>::__open(int __fd, 1532 ios_base::openmode __mode) { 1533 if (__sb_.__open(__fd, __mode | ios_base::out)) 1534 this->clear(); 1535 else 1536 this->setstate(ios_base::failbit); 1537} 1538 1539template <class _CharT, class _Traits> 1540inline 1541void 1542basic_ofstream<_CharT, _Traits>::close() 1543{ 1544 if (__sb_.close() == nullptr) 1545 this->setstate(ios_base::failbit); 1546} 1547 1548// basic_fstream 1549 1550template <class _CharT, class _Traits> 1551class _LIBCPP_TEMPLATE_VIS basic_fstream 1552 : public basic_iostream<_CharT, _Traits> 1553{ 1554public: 1555 typedef _CharT char_type; 1556 typedef _Traits traits_type; 1557 typedef typename traits_type::int_type int_type; 1558 typedef typename traits_type::pos_type pos_type; 1559 typedef typename traits_type::off_type off_type; 1560 1561 _LIBCPP_INLINE_VISIBILITY 1562 basic_fstream(); 1563 _LIBCPP_INLINE_VISIBILITY 1564 explicit basic_fstream(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1565#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1566 _LIBCPP_INLINE_VISIBILITY 1567 explicit basic_fstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1568#endif 1569 _LIBCPP_INLINE_VISIBILITY 1570 explicit basic_fstream(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1571 1572#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 1573 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 1574 explicit basic_fstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) 1575 : basic_fstream(__p.c_str(), __mode) {} 1576#endif // _LIBCPP_STD_VER >= 17 1577 1578 _LIBCPP_INLINE_VISIBILITY 1579 basic_fstream(basic_fstream&& __rhs); 1580 1581 _LIBCPP_INLINE_VISIBILITY 1582 basic_fstream& operator=(basic_fstream&& __rhs); 1583 1584 _LIBCPP_INLINE_VISIBILITY 1585 void swap(basic_fstream& __rhs); 1586 1587 _LIBCPP_INLINE_VISIBILITY 1588 basic_filebuf<char_type, traits_type>* rdbuf() const; 1589 _LIBCPP_INLINE_VISIBILITY 1590 bool is_open() const; 1591 _LIBCPP_HIDE_FROM_ABI void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1592#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1593 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1594#endif 1595 _LIBCPP_HIDE_FROM_ABI void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1596 1597#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) 1598 _LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY 1599 void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in|ios_base::out) 1600 { return open(__p.c_str(), __mode); } 1601#endif // _LIBCPP_STD_VER >= 17 1602 1603 _LIBCPP_INLINE_VISIBILITY 1604 void close(); 1605 1606private: 1607 basic_filebuf<char_type, traits_type> __sb_; 1608}; 1609 1610template <class _CharT, class _Traits> 1611inline 1612basic_fstream<_CharT, _Traits>::basic_fstream() 1613 : basic_iostream<char_type, traits_type>(&__sb_) 1614{ 1615} 1616 1617template <class _CharT, class _Traits> 1618inline 1619basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode) 1620 : basic_iostream<char_type, traits_type>(&__sb_) 1621{ 1622 if (__sb_.open(__s, __mode) == nullptr) 1623 this->setstate(ios_base::failbit); 1624} 1625 1626#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1627template <class _CharT, class _Traits> 1628inline 1629basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode) 1630 : basic_iostream<char_type, traits_type>(&__sb_) 1631{ 1632 if (__sb_.open(__s, __mode) == nullptr) 1633 this->setstate(ios_base::failbit); 1634} 1635#endif 1636 1637template <class _CharT, class _Traits> 1638inline 1639basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode) 1640 : basic_iostream<char_type, traits_type>(&__sb_) 1641{ 1642 if (__sb_.open(__s, __mode) == nullptr) 1643 this->setstate(ios_base::failbit); 1644} 1645 1646template <class _CharT, class _Traits> 1647inline 1648basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs) 1649 : basic_iostream<char_type, traits_type>(_VSTD::move(__rhs)), 1650 __sb_(_VSTD::move(__rhs.__sb_)) 1651{ 1652 this->set_rdbuf(&__sb_); 1653} 1654 1655template <class _CharT, class _Traits> 1656inline 1657basic_fstream<_CharT, _Traits>& 1658basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs) 1659{ 1660 basic_iostream<char_type, traits_type>::operator=(_VSTD::move(__rhs)); 1661 __sb_ = _VSTD::move(__rhs.__sb_); 1662 return *this; 1663} 1664 1665template <class _CharT, class _Traits> 1666inline 1667void 1668basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs) 1669{ 1670 basic_iostream<char_type, traits_type>::swap(__rhs); 1671 __sb_.swap(__rhs.__sb_); 1672} 1673 1674template <class _CharT, class _Traits> 1675inline _LIBCPP_INLINE_VISIBILITY 1676void 1677swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y) 1678{ 1679 __x.swap(__y); 1680} 1681 1682template <class _CharT, class _Traits> 1683inline 1684basic_filebuf<_CharT, _Traits>* 1685basic_fstream<_CharT, _Traits>::rdbuf() const 1686{ 1687 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_); 1688} 1689 1690template <class _CharT, class _Traits> 1691inline 1692bool 1693basic_fstream<_CharT, _Traits>::is_open() const 1694{ 1695 return __sb_.is_open(); 1696} 1697 1698template <class _CharT, class _Traits> 1699void 1700basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) 1701{ 1702 if (__sb_.open(__s, __mode)) 1703 this->clear(); 1704 else 1705 this->setstate(ios_base::failbit); 1706} 1707 1708#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1709template <class _CharT, class _Traits> 1710void 1711basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) 1712{ 1713 if (__sb_.open(__s, __mode)) 1714 this->clear(); 1715 else 1716 this->setstate(ios_base::failbit); 1717} 1718#endif 1719 1720template <class _CharT, class _Traits> 1721void 1722basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) 1723{ 1724 if (__sb_.open(__s, __mode)) 1725 this->clear(); 1726 else 1727 this->setstate(ios_base::failbit); 1728} 1729 1730template <class _CharT, class _Traits> 1731inline 1732void 1733basic_fstream<_CharT, _Traits>::close() 1734{ 1735 if (__sb_.close() == nullptr) 1736 this->setstate(ios_base::failbit); 1737} 1738 1739#if defined(_LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1) 1740extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>; 1741extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>; 1742extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>; 1743#endif 1744 1745_LIBCPP_END_NAMESPACE_STD 1746 1747#endif // _LIBCPP_HAS_NO_FSTREAM 1748 1749_LIBCPP_POP_MACROS 1750 1751#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1752# include <atomic> 1753# include <concepts> 1754# include <cstdlib> 1755# include <iosfwd> 1756# include <limits> 1757# include <new> 1758# include <stdexcept> 1759# include <type_traits> 1760#endif 1761 1762#endif // _LIBCPP_FSTREAM 1763