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___CXX03_FSTREAM 11#define _LIBCPP___CXX03_FSTREAM 12 13/* 14 fstream synopsis 15 16template <class charT, class traits = char_traits<charT> > 17class basic_filebuf 18 : public basic_streambuf<charT, traits> 19{ 20public: 21 typedef charT char_type; 22 typedef traits traits_type; 23 typedef typename traits_type::int_type int_type; 24 typedef typename traits_type::pos_type pos_type; 25 typedef typename traits_type::off_type off_type; 26 27 // 27.9.1.2 Constructors/destructor: 28 basic_filebuf(); 29 basic_filebuf(basic_filebuf&& rhs); 30 virtual ~basic_filebuf(); 31 32 // 27.9.1.3 Assign/swap: 33 basic_filebuf& operator=(basic_filebuf&& rhs); 34 void swap(basic_filebuf& rhs); 35 36 // 27.9.1.4 Members: 37 bool is_open() const; 38 basic_filebuf* open(const char* s, ios_base::openmode mode); 39 basic_filebuf* open(const string& s, ios_base::openmode mode); 40 basic_filebuf* open(const filesystem::path& p, ios_base::openmode mode); // C++17 41 basic_filebuf* close(); 42 43protected: 44 // 27.9.1.5 Overridden virtual functions: 45 virtual streamsize showmanyc(); 46 virtual int_type underflow(); 47 virtual int_type uflow(); 48 virtual int_type pbackfail(int_type c = traits_type::eof()); 49 virtual int_type overflow (int_type c = traits_type::eof()); 50 virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* s, streamsize n); 51 virtual pos_type seekoff(off_type off, ios_base::seekdir way, 52 ios_base::openmode which = ios_base::in | ios_base::out); 53 virtual pos_type seekpos(pos_type sp, 54 ios_base::openmode which = ios_base::in | ios_base::out); 55 virtual int sync(); 56 virtual void imbue(const locale& loc); 57}; 58 59template <class charT, class traits> 60 void 61 swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y); 62 63typedef basic_filebuf<char> filebuf; 64typedef basic_filebuf<wchar_t> wfilebuf; 65 66template <class charT, class traits = char_traits<charT> > 67class basic_ifstream 68 : public basic_istream<charT,traits> 69{ 70public: 71 typedef charT char_type; 72 typedef traits traits_type; 73 typedef typename traits_type::int_type int_type; 74 typedef typename traits_type::pos_type pos_type; 75 typedef typename traits_type::off_type off_type; 76 using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 77 78 basic_ifstream(); 79 explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in); 80 explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in); 81 template<class T> 82 explicit basic_ifstream(const T& s, ios_base::openmode mode = ios_base::in); // Since C++17 83 basic_ifstream(basic_ifstream&& rhs); 84 85 basic_ifstream& operator=(basic_ifstream&& rhs); 86 void swap(basic_ifstream& rhs); 87 88 basic_filebuf<char_type, traits_type>* rdbuf() const; 89 native_handle_type native_handle() const noexcept; // Since C++26 90 bool is_open() const; 91 void open(const char* s, ios_base::openmode mode = ios_base::in); 92 void open(const string& s, ios_base::openmode mode = ios_base::in); 93 void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); // C++17 94 95 void close(); 96}; 97 98template <class charT, class traits> 99 void 100 swap(basic_ifstream<charT, traits>& x, basic_ifstream<charT, traits>& y); 101 102typedef basic_ifstream<char> ifstream; 103typedef basic_ifstream<wchar_t> wifstream; 104 105template <class charT, class traits = char_traits<charT> > 106class basic_ofstream 107 : public basic_ostream<charT,traits> 108{ 109public: 110 typedef charT char_type; 111 typedef traits traits_type; 112 typedef typename traits_type::int_type int_type; 113 typedef typename traits_type::pos_type pos_type; 114 typedef typename traits_type::off_type off_type; 115 using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 116 117 basic_ofstream(); 118 explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out); 119 explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out); 120 template<class T> 121 explicit basic_ofstream(const T& s, ios_base::openmode mode = ios_base::out); // Since C++17 122 basic_ofstream(basic_ofstream&& rhs); 123 124 basic_ofstream& operator=(basic_ofstream&& rhs); 125 void swap(basic_ofstream& rhs); 126 127 basic_filebuf<char_type, traits_type>* rdbuf() const; 128 native_handle_type native_handle() const noexcept; // Since C++26 129 130 bool is_open() const; 131 void open(const char* s, ios_base::openmode mode = ios_base::out); 132 void open(const string& s, ios_base::openmode mode = ios_base::out); 133 void open(const filesystem::path& p, 134 ios_base::openmode mode = ios_base::out); // C++17 135 136 void close(); 137}; 138 139template <class charT, class traits> 140 void 141 swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y); 142 143typedef basic_ofstream<char> ofstream; 144typedef basic_ofstream<wchar_t> wofstream; 145 146template <class charT, class traits=char_traits<charT> > 147class basic_fstream 148 : public basic_iostream<charT,traits> 149{ 150public: 151 typedef charT char_type; 152 typedef traits traits_type; 153 typedef typename traits_type::int_type int_type; 154 typedef typename traits_type::pos_type pos_type; 155 typedef typename traits_type::off_type off_type; 156 using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 157 158 basic_fstream(); 159 explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 160 explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); 161 template<class T> 162 explicit basic_fstream(const T& s, ios_base::openmode mode = ios_base::in | ios_base::out); // Since C++17 163 basic_fstream(basic_fstream&& rhs); 164 165 basic_fstream& operator=(basic_fstream&& rhs); 166 void swap(basic_fstream& rhs); 167 168 basic_filebuf<char_type, traits_type>* rdbuf() const; 169 native_handle_type native_handle() const noexcept; // Since C++26 170 bool is_open() const; 171 void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); 172 void open(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); 173 void open(const filesystem::path& s, 174 ios_base::openmode mode = ios_base::in|ios_base::out); // C++17 175 176 void close(); 177}; 178 179template <class charT, class traits> 180 void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y); 181 182typedef basic_fstream<char> fstream; 183typedef basic_fstream<wchar_t> wfstream; 184 185} // std 186 187*/ 188 189#include <__cxx03/__algorithm/max.h> 190#include <__cxx03/__assert> 191#include <__cxx03/__config> 192#include <__cxx03/__fwd/fstream.h> 193#include <__cxx03/__locale> 194#include <__cxx03/__type_traits/enable_if.h> 195#include <__cxx03/__type_traits/is_same.h> 196#include <__cxx03/__utility/move.h> 197#include <__cxx03/__utility/swap.h> 198#include <__cxx03/__utility/unreachable.h> 199#include <__cxx03/cstdio> 200#include <__cxx03/istream> 201#include <__cxx03/ostream> 202#include <__cxx03/typeinfo> 203#include <__cxx03/version> 204 205#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 206# pragma GCC system_header 207#endif 208 209_LIBCPP_PUSH_MACROS 210#include <__cxx03/__undef_macros> 211 212#if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION) 213# define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS 214#endif 215 216#if !defined(_LIBCPP_HAS_NO_FILESYSTEM) 217 218_LIBCPP_BEGIN_NAMESPACE_STD 219 220template <class _CharT, class _Traits> 221class _LIBCPP_TEMPLATE_VIS basic_filebuf : public basic_streambuf<_CharT, _Traits> { 222public: 223 typedef _CharT char_type; 224 typedef _Traits traits_type; 225 typedef typename traits_type::int_type int_type; 226 typedef typename traits_type::pos_type pos_type; 227 typedef typename traits_type::off_type off_type; 228 typedef typename traits_type::state_type state_type; 229 230 // 27.9.1.2 Constructors/destructor: 231 basic_filebuf(); 232 basic_filebuf(basic_filebuf&& __rhs); 233 ~basic_filebuf() override; 234 235 // 27.9.1.3 Assign/swap: 236 _LIBCPP_HIDE_FROM_ABI basic_filebuf& operator=(basic_filebuf&& __rhs); 237 void swap(basic_filebuf& __rhs); 238 239 // 27.9.1.4 Members: 240 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 241 basic_filebuf* open(const char* __s, ios_base::openmode __mode); 242# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 243 basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode); 244# endif 245 _LIBCPP_HIDE_FROM_ABI basic_filebuf* open(const string& __s, ios_base::openmode __mode); 246 247 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __open(int __fd, ios_base::openmode __mode); 248 basic_filebuf* close(); 249 250 _LIBCPP_HIDE_FROM_ABI inline static const char* __make_mdstring(ios_base::openmode __mode) _NOEXCEPT; 251# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 252 _LIBCPP_HIDE_FROM_ABI inline static const wchar_t* __make_mdwstring(ios_base::openmode __mode) _NOEXCEPT; 253# endif 254 255protected: 256 // 27.9.1.5 Overridden virtual functions: 257 int_type underflow() override; 258 int_type pbackfail(int_type __c = traits_type::eof()) override; 259 int_type overflow(int_type __c = traits_type::eof()) override; 260 basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n) override; 261 pos_type 262 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 263 pos_type seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out) override; 264 int sync() override; 265 void imbue(const locale& __loc) override; 266 267private: 268 char* __extbuf_; 269 const char* __extbufnext_; 270 const char* __extbufend_; 271 char __extbuf_min_[8]; 272 size_t __ebs_; 273 char_type* __intbuf_; 274 size_t __ibs_; 275 FILE* __file_; 276 const codecvt<char_type, char, state_type>* __cv_; 277 state_type __st_; 278 state_type __st_last_; 279 ios_base::openmode __om_; 280 // There have been no file operations yet, which allows setting unbuffered 281 // I/O mode. 282 static const ios_base::openmode __no_io_operations = ios_base::trunc; 283 // Unbuffered I/O mode has been requested. 284 static const ios_base::openmode __use_unbuffered_io = ios_base::ate; 285 // Used to track the currently used mode and track whether the output should 286 // be unbuffered. 287 // [filebuf.virtuals]/12 288 // If setbuf(0, 0) is called on a stream before any I/O has occurred on 289 // that stream, the stream becomes unbuffered. Otherwise the results are 290 // implementation-defined. 291 // This allows calling setbuf(0, 0) 292 // - before opening a file, 293 // - after opening a file, before 294 // - a read 295 // - a write 296 // - a seek. 297 // Note that opening a file with ios_base::ate does a seek operation. 298 // Normally underflow, overflow, and sync change this flag to ios_base::in, 299 // ios_base_out, or 0. 300 // 301 // The ios_base::trunc and ios_base::ate flags are not used in __cm_. They 302 // are used to track the state of the unbuffered request. For readability 303 // they have the aliases __no_io_operations and __use_unbuffered_io 304 // respectively. 305 // 306 // The __no_io_operations and __use_unbuffered_io flags are used in the 307 // following way: 308 // - __no_io_operations is set upon construction to indicate the unbuffered 309 // state can be set. 310 // - When requesting unbuffered output: 311 // - If the file is open it sets the mode. 312 // - Else places a request by adding the __use_unbuffered_io flag. 313 // - When a file is opened it checks whether both __no_io_operations and 314 // __use_unbuffered_io are set. If so switches to unbuffered mode. 315 // - All file I/O operations change the mode effectively clearing the 316 // __no_io_operations and __use_unbuffered_io flags. 317 ios_base::openmode __cm_; 318 bool __owns_eb_; 319 bool __owns_ib_; 320 bool __always_noconv_; 321 322 bool __read_mode(); 323 void __write_mode(); 324 325 _LIBCPP_EXPORTED_FROM_ABI friend FILE* __get_ostream_file(ostream&); 326 327 // There are multiple (__)open function, they use different C-API open 328 // function. After that call these functions behave the same. This function 329 // does that part and determines the final return value. 330 _LIBCPP_HIDE_FROM_ABI basic_filebuf* __do_open(FILE* __file, ios_base::openmode __mode) { 331 __file_ = __file; 332 if (!__file_) 333 return nullptr; 334 335 __om_ = __mode; 336 if (__cm_ == (__no_io_operations | __use_unbuffered_io)) { 337 std::setbuf(__file_, nullptr); 338 __cm_ = 0; 339 } 340 341 if (__mode & ios_base::ate) { 342 __cm_ = 0; 343 if (fseek(__file_, 0, SEEK_END)) { 344 fclose(__file_); 345 __file_ = nullptr; 346 return nullptr; 347 } 348 } 349 350 return this; 351 } 352 353 // If the file is already open, switch to unbuffered mode. Otherwise, record 354 // the request to use unbuffered mode so that we use that mode when we 355 // eventually open the file. 356 _LIBCPP_HIDE_FROM_ABI void __request_unbuffered_mode(char_type* __s, streamsize __n) { 357 if (__cm_ == __no_io_operations && __s == nullptr && __n == 0) { 358 if (__file_) { 359 std::setbuf(__file_, nullptr); 360 __cm_ = 0; 361 } else { 362 __cm_ = __no_io_operations | __use_unbuffered_io; 363 } 364 } 365 } 366}; 367 368template <class _CharT, class _Traits> 369basic_filebuf<_CharT, _Traits>::basic_filebuf() 370 : __extbuf_(nullptr), 371 __extbufnext_(nullptr), 372 __extbufend_(nullptr), 373 __ebs_(0), 374 __intbuf_(nullptr), 375 __ibs_(0), 376 __file_(nullptr), 377 __cv_(nullptr), 378 __st_(), 379 __st_last_(), 380 __om_(0), 381 __cm_(__no_io_operations), 382 __owns_eb_(false), 383 __owns_ib_(false), 384 __always_noconv_(false) { 385 if (std::has_facet<codecvt<char_type, char, state_type> >(this->getloc())) { 386 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(this->getloc()); 387 __always_noconv_ = __cv_->always_noconv(); 388 } 389 setbuf(nullptr, 4096); 390} 391 392template <class _CharT, class _Traits> 393basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs) : basic_streambuf<_CharT, _Traits>(__rhs) { 394 if (__rhs.__extbuf_ == __rhs.__extbuf_min_) { 395 __extbuf_ = __extbuf_min_; 396 __extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_); 397 __extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_); 398 } else { 399 __extbuf_ = __rhs.__extbuf_; 400 __extbufnext_ = __rhs.__extbufnext_; 401 __extbufend_ = __rhs.__extbufend_; 402 } 403 __ebs_ = __rhs.__ebs_; 404 __intbuf_ = __rhs.__intbuf_; 405 __ibs_ = __rhs.__ibs_; 406 __file_ = __rhs.__file_; 407 __cv_ = __rhs.__cv_; 408 __st_ = __rhs.__st_; 409 __st_last_ = __rhs.__st_last_; 410 __om_ = __rhs.__om_; 411 __cm_ = __rhs.__cm_; 412 __owns_eb_ = __rhs.__owns_eb_; 413 __owns_ib_ = __rhs.__owns_ib_; 414 __always_noconv_ = __rhs.__always_noconv_; 415 if (__rhs.pbase()) { 416 if (__rhs.pbase() == __rhs.__intbuf_) 417 this->setp(__intbuf_, __intbuf_ + (__rhs.epptr() - __rhs.pbase())); 418 else 419 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__rhs.epptr() - __rhs.pbase())); 420 this->__pbump(__rhs.pptr() - __rhs.pbase()); 421 } else if (__rhs.eback()) { 422 if (__rhs.eback() == __rhs.__intbuf_) 423 this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()), __intbuf_ + (__rhs.egptr() - __rhs.eback())); 424 else 425 this->setg((char_type*)__extbuf_, 426 (char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()), 427 (char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback())); 428 } 429 __rhs.__extbuf_ = nullptr; 430 __rhs.__extbufnext_ = nullptr; 431 __rhs.__extbufend_ = nullptr; 432 __rhs.__ebs_ = 0; 433 __rhs.__intbuf_ = 0; 434 __rhs.__ibs_ = 0; 435 __rhs.__file_ = nullptr; 436 __rhs.__st_ = state_type(); 437 __rhs.__st_last_ = state_type(); 438 __rhs.__om_ = 0; 439 __rhs.__cm_ = 0; 440 __rhs.__owns_eb_ = false; 441 __rhs.__owns_ib_ = false; 442 __rhs.setg(0, 0, 0); 443 __rhs.setp(0, 0); 444} 445 446template <class _CharT, class _Traits> 447inline basic_filebuf<_CharT, _Traits>& basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs) { 448 close(); 449 swap(__rhs); 450 return *this; 451} 452 453template <class _CharT, class _Traits> 454basic_filebuf<_CharT, _Traits>::~basic_filebuf() { 455# ifndef _LIBCPP_HAS_NO_EXCEPTIONS 456 try { 457# endif // _LIBCPP_HAS_NO_EXCEPTIONS 458 close(); 459# ifndef _LIBCPP_HAS_NO_EXCEPTIONS 460 } catch (...) { 461 } 462# endif // _LIBCPP_HAS_NO_EXCEPTIONS 463 if (__owns_eb_) 464 delete[] __extbuf_; 465 if (__owns_ib_) 466 delete[] __intbuf_; 467} 468 469template <class _CharT, class _Traits> 470void basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs) { 471 basic_streambuf<char_type, traits_type>::swap(__rhs); 472 if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { 473 // Neither *this nor __rhs uses the small buffer, so we can simply swap the pointers. 474 std::swap(__extbuf_, __rhs.__extbuf_); 475 std::swap(__extbufnext_, __rhs.__extbufnext_); 476 std::swap(__extbufend_, __rhs.__extbufend_); 477 } else { 478 ptrdiff_t __ln = __extbufnext_ ? __extbufnext_ - __extbuf_ : 0; 479 ptrdiff_t __le = __extbufend_ ? __extbufend_ - __extbuf_ : 0; 480 ptrdiff_t __rn = __rhs.__extbufnext_ ? __rhs.__extbufnext_ - __rhs.__extbuf_ : 0; 481 ptrdiff_t __re = __rhs.__extbufend_ ? __rhs.__extbufend_ - __rhs.__extbuf_ : 0; 482 if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { 483 // *this uses the small buffer, but __rhs doesn't. 484 __extbuf_ = __rhs.__extbuf_; 485 __rhs.__extbuf_ = __rhs.__extbuf_min_; 486 std::memmove(__rhs.__extbuf_min_, __extbuf_min_, sizeof(__extbuf_min_)); 487 } else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_) { 488 // *this doesn't use the small buffer, but __rhs does. 489 __rhs.__extbuf_ = __extbuf_; 490 __extbuf_ = __extbuf_min_; 491 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 492 } else { 493 // Both *this and __rhs use the small buffer. 494 char __tmp[sizeof(__extbuf_min_)]; 495 std::memmove(__tmp, __extbuf_min_, sizeof(__extbuf_min_)); 496 std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); 497 std::memmove(__rhs.__extbuf_min_, __tmp, sizeof(__extbuf_min_)); 498 } 499 __extbufnext_ = __extbuf_ + __rn; 500 __extbufend_ = __extbuf_ + __re; 501 __rhs.__extbufnext_ = __rhs.__extbuf_ + __ln; 502 __rhs.__extbufend_ = __rhs.__extbuf_ + __le; 503 } 504 std::swap(__ebs_, __rhs.__ebs_); 505 std::swap(__intbuf_, __rhs.__intbuf_); 506 std::swap(__ibs_, __rhs.__ibs_); 507 std::swap(__file_, __rhs.__file_); 508 std::swap(__cv_, __rhs.__cv_); 509 std::swap(__st_, __rhs.__st_); 510 std::swap(__st_last_, __rhs.__st_last_); 511 std::swap(__om_, __rhs.__om_); 512 std::swap(__cm_, __rhs.__cm_); 513 std::swap(__owns_eb_, __rhs.__owns_eb_); 514 std::swap(__owns_ib_, __rhs.__owns_ib_); 515 std::swap(__always_noconv_, __rhs.__always_noconv_); 516 if (this->eback() == (char_type*)__rhs.__extbuf_min_) { 517 ptrdiff_t __n = this->gptr() - this->eback(); 518 ptrdiff_t __e = this->egptr() - this->eback(); 519 this->setg((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __n, (char_type*)__extbuf_min_ + __e); 520 } else if (this->pbase() == (char_type*)__rhs.__extbuf_min_) { 521 ptrdiff_t __n = this->pptr() - this->pbase(); 522 ptrdiff_t __e = this->epptr() - this->pbase(); 523 this->setp((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __e); 524 this->__pbump(__n); 525 } 526 if (__rhs.eback() == (char_type*)__extbuf_min_) { 527 ptrdiff_t __n = __rhs.gptr() - __rhs.eback(); 528 ptrdiff_t __e = __rhs.egptr() - __rhs.eback(); 529 __rhs.setg( 530 (char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __n, (char_type*)__rhs.__extbuf_min_ + __e); 531 } else if (__rhs.pbase() == (char_type*)__extbuf_min_) { 532 ptrdiff_t __n = __rhs.pptr() - __rhs.pbase(); 533 ptrdiff_t __e = __rhs.epptr() - __rhs.pbase(); 534 __rhs.setp((char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __e); 535 __rhs.__pbump(__n); 536 } 537} 538 539template <class _CharT, class _Traits> 540inline _LIBCPP_HIDE_FROM_ABI void swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y) { 541 __x.swap(__y); 542} 543 544template <class _CharT, class _Traits> 545inline bool basic_filebuf<_CharT, _Traits>::is_open() const { 546 return __file_ != nullptr; 547} 548 549template <class _CharT, class _Traits> 550const char* basic_filebuf<_CharT, _Traits>::__make_mdstring(ios_base::openmode __mode) _NOEXCEPT { 551 switch (__mode & ~ios_base::ate) { 552 case ios_base::out: 553 case ios_base::out | ios_base::trunc: 554 return "w" _LIBCPP_FOPEN_CLOEXEC_MODE; 555 case ios_base::out | ios_base::app: 556 case ios_base::app: 557 return "a" _LIBCPP_FOPEN_CLOEXEC_MODE; 558 case ios_base::in: 559 return "r" _LIBCPP_FOPEN_CLOEXEC_MODE; 560 case ios_base::in | ios_base::out: 561 return "r+" _LIBCPP_FOPEN_CLOEXEC_MODE; 562 case ios_base::in | ios_base::out | ios_base::trunc: 563 return "w+" _LIBCPP_FOPEN_CLOEXEC_MODE; 564 case ios_base::in | ios_base::out | ios_base::app: 565 case ios_base::in | ios_base::app: 566 return "a+" _LIBCPP_FOPEN_CLOEXEC_MODE; 567 case ios_base::out | ios_base::binary: 568 case ios_base::out | ios_base::trunc | ios_base::binary: 569 return "wb" _LIBCPP_FOPEN_CLOEXEC_MODE; 570 case ios_base::out | ios_base::app | ios_base::binary: 571 case ios_base::app | ios_base::binary: 572 return "ab" _LIBCPP_FOPEN_CLOEXEC_MODE; 573 case ios_base::in | ios_base::binary: 574 return "rb" _LIBCPP_FOPEN_CLOEXEC_MODE; 575 case ios_base::in | ios_base::out | ios_base::binary: 576 return "r+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 577 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 578 return "w+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 579 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 580 case ios_base::in | ios_base::app | ios_base::binary: 581 return "a+b" _LIBCPP_FOPEN_CLOEXEC_MODE; 582 default: 583 return nullptr; 584 } 585 __libcpp_unreachable(); 586} 587 588# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 589template <class _CharT, class _Traits> 590const wchar_t* basic_filebuf<_CharT, _Traits>::__make_mdwstring(ios_base::openmode __mode) _NOEXCEPT { 591 switch (__mode & ~ios_base::ate) { 592 case ios_base::out: 593 case ios_base::out | ios_base::trunc: 594 return L"w"; 595 case ios_base::out | ios_base::app: 596 case ios_base::app: 597 return L"a"; 598 case ios_base::in: 599 return L"r"; 600 case ios_base::in | ios_base::out: 601 return L"r+"; 602 case ios_base::in | ios_base::out | ios_base::trunc: 603 return L"w+"; 604 case ios_base::in | ios_base::out | ios_base::app: 605 case ios_base::in | ios_base::app: 606 return L"a+"; 607 case ios_base::out | ios_base::binary: 608 case ios_base::out | ios_base::trunc | ios_base::binary: 609 return L"wb"; 610 case ios_base::out | ios_base::app | ios_base::binary: 611 case ios_base::app | ios_base::binary: 612 return L"ab"; 613 case ios_base::in | ios_base::binary: 614 return L"rb"; 615 case ios_base::in | ios_base::out | ios_base::binary: 616 return L"r+b"; 617 case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: 618 return L"w+b"; 619 case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: 620 case ios_base::in | ios_base::app | ios_base::binary: 621 return L"a+b"; 622 default: 623 return nullptr; 624 } 625 __libcpp_unreachable(); 626} 627# endif 628 629template <class _CharT, class _Traits> 630basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 631 if (__file_) 632 return nullptr; 633 const char* __mdstr = __make_mdstring(__mode); 634 if (!__mdstr) 635 return nullptr; 636 637 return __do_open(fopen(__s, __mdstr), __mode); 638} 639 640template <class _CharT, class _Traits> 641inline basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 642 if (__file_) 643 return nullptr; 644 const char* __mdstr = __make_mdstring(__mode); 645 if (!__mdstr) 646 return nullptr; 647 648 return __do_open(fdopen(__fd, __mdstr), __mode); 649} 650 651# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 652// This is basically the same as the char* overload except that it uses _wfopen 653// and long mode strings. 654template <class _CharT, class _Traits> 655basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 656 if (__file_) 657 return nullptr; 658 const wchar_t* __mdstr = __make_mdwstring(__mode); 659 if (!__mdstr) 660 return nullptr; 661 662 return __do_open(_wfopen(__s, __mdstr), __mode); 663} 664# endif 665 666template <class _CharT, class _Traits> 667inline basic_filebuf<_CharT, _Traits>* 668basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 669 return open(__s.c_str(), __mode); 670} 671 672template <class _CharT, class _Traits> 673basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::close() { 674 basic_filebuf<_CharT, _Traits>* __rt = nullptr; 675 if (__file_) { 676 __rt = this; 677 unique_ptr<FILE, int (*)(FILE*)> __h(__file_, fclose); 678 if (sync()) 679 __rt = nullptr; 680 if (fclose(__h.release())) 681 __rt = nullptr; 682 __file_ = nullptr; 683 setbuf(0, 0); 684 } 685 return __rt; 686} 687 688template <class _CharT, class _Traits> 689typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::underflow() { 690 if (__file_ == nullptr) 691 return traits_type::eof(); 692 bool __initial = __read_mode(); 693 char_type __1buf; 694 if (this->gptr() == nullptr) 695 this->setg(&__1buf, &__1buf + 1, &__1buf + 1); 696 const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4); 697 int_type __c = traits_type::eof(); 698 if (this->gptr() == this->egptr()) { 699 std::memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type)); 700 if (__always_noconv_) { 701 size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz); 702 __nmemb = ::fread(this->eback() + __unget_sz, 1, __nmemb, __file_); 703 if (__nmemb != 0) { 704 this->setg(this->eback(), this->eback() + __unget_sz, this->eback() + __unget_sz + __nmemb); 705 __c = traits_type::to_int_type(*this->gptr()); 706 } 707 } else { 708 if (__extbufend_ != __extbufnext_) { 709 _LIBCPP_ASSERT_NON_NULL(__extbufnext_ != nullptr, "underflow moving from nullptr"); 710 _LIBCPP_ASSERT_NON_NULL(__extbuf_ != nullptr, "underflow moving into nullptr"); 711 std::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_); 712 } 713 __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_); 714 __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_); 715 size_t __nmemb = 716 std::min(static_cast<size_t>(__ibs_ - __unget_sz), static_cast<size_t>(__extbufend_ - __extbufnext_)); 717 codecvt_base::result __r; 718 __st_last_ = __st_; 719 size_t __nr = fread((void*)const_cast<char*>(__extbufnext_), 1, __nmemb, __file_); 720 if (__nr != 0) { 721 if (!__cv_) 722 __throw_bad_cast(); 723 724 __extbufend_ = __extbufnext_ + __nr; 725 char_type* __inext; 726 __r = __cv_->in( 727 __st_, __extbuf_, __extbufend_, __extbufnext_, this->eback() + __unget_sz, this->eback() + __ibs_, __inext); 728 if (__r == codecvt_base::noconv) { 729 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)const_cast<char*>(__extbufend_)); 730 __c = traits_type::to_int_type(*this->gptr()); 731 } else if (__inext != this->eback() + __unget_sz) { 732 this->setg(this->eback(), this->eback() + __unget_sz, __inext); 733 __c = traits_type::to_int_type(*this->gptr()); 734 } 735 } 736 } 737 } else 738 __c = traits_type::to_int_type(*this->gptr()); 739 if (this->eback() == &__1buf) 740 this->setg(nullptr, nullptr, nullptr); 741 return __c; 742} 743 744template <class _CharT, class _Traits> 745typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c) { 746 if (__file_ && this->eback() < this->gptr()) { 747 if (traits_type::eq_int_type(__c, traits_type::eof())) { 748 this->gbump(-1); 749 return traits_type::not_eof(__c); 750 } 751 if ((__om_ & ios_base::out) || traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) { 752 this->gbump(-1); 753 *this->gptr() = traits_type::to_char_type(__c); 754 return __c; 755 } 756 } 757 return traits_type::eof(); 758} 759 760template <class _CharT, class _Traits> 761typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::overflow(int_type __c) { 762 if (__file_ == nullptr) 763 return traits_type::eof(); 764 __write_mode(); 765 char_type __1buf; 766 char_type* __pb_save = this->pbase(); 767 char_type* __epb_save = this->epptr(); 768 if (!traits_type::eq_int_type(__c, traits_type::eof())) { 769 if (this->pptr() == nullptr) 770 this->setp(&__1buf, &__1buf + 1); 771 *this->pptr() = traits_type::to_char_type(__c); 772 this->pbump(1); 773 } 774 if (this->pptr() != this->pbase()) { 775 if (__always_noconv_) { 776 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase()); 777 if (std::fwrite(this->pbase(), sizeof(char_type), __nmemb, __file_) != __nmemb) 778 return traits_type::eof(); 779 } else { 780 char* __extbe = __extbuf_; 781 codecvt_base::result __r; 782 do { 783 if (!__cv_) 784 __throw_bad_cast(); 785 786 const char_type* __e; 787 __r = __cv_->out(__st_, this->pbase(), this->pptr(), __e, __extbuf_, __extbuf_ + __ebs_, __extbe); 788 if (__e == this->pbase()) 789 return traits_type::eof(); 790 if (__r == codecvt_base::noconv) { 791 size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase()); 792 if (std::fwrite(this->pbase(), 1, __nmemb, __file_) != __nmemb) 793 return traits_type::eof(); 794 } else if (__r == codecvt_base::ok || __r == codecvt_base::partial) { 795 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 796 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 797 return traits_type::eof(); 798 if (__r == codecvt_base::partial) { 799 this->setp(const_cast<char_type*>(__e), this->pptr()); 800 this->__pbump(this->epptr() - this->pbase()); 801 } 802 } else 803 return traits_type::eof(); 804 } while (__r == codecvt_base::partial); 805 } 806 this->setp(__pb_save, __epb_save); 807 } 808 return traits_type::not_eof(__c); 809} 810 811template <class _CharT, class _Traits> 812basic_streambuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n) { 813 this->setg(nullptr, nullptr, nullptr); 814 this->setp(nullptr, nullptr); 815 __request_unbuffered_mode(__s, __n); 816 if (__owns_eb_) 817 delete[] __extbuf_; 818 if (__owns_ib_) 819 delete[] __intbuf_; 820 __ebs_ = __n; 821 if (__ebs_ > sizeof(__extbuf_min_)) { 822 if (__always_noconv_ && __s) { 823 __extbuf_ = (char*)__s; 824 __owns_eb_ = false; 825 } else { 826 __extbuf_ = new char[__ebs_]; 827 __owns_eb_ = true; 828 } 829 } else { 830 __extbuf_ = __extbuf_min_; 831 __ebs_ = sizeof(__extbuf_min_); 832 __owns_eb_ = false; 833 } 834 if (!__always_noconv_) { 835 __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_)); 836 if (__s && __ibs_ > sizeof(__extbuf_min_)) { 837 __intbuf_ = __s; 838 __owns_ib_ = false; 839 } else { 840 __intbuf_ = new char_type[__ibs_]; 841 __owns_ib_ = true; 842 } 843 } else { 844 __ibs_ = 0; 845 __intbuf_ = nullptr; 846 __owns_ib_ = false; 847 } 848 return this; 849} 850 851template <class _CharT, class _Traits> 852typename basic_filebuf<_CharT, _Traits>::pos_type 853basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode) { 854 if (!__cv_) 855 __throw_bad_cast(); 856 857 int __width = __cv_->encoding(); 858 if (__file_ == nullptr || (__width <= 0 && __off != 0) || sync()) 859 return pos_type(off_type(-1)); 860 // __width > 0 || __off == 0 861 int __whence; 862 switch (__way) { 863 case ios_base::beg: 864 __whence = SEEK_SET; 865 break; 866 case ios_base::cur: 867 __whence = SEEK_CUR; 868 break; 869 case ios_base::end: 870 __whence = SEEK_END; 871 break; 872 default: 873 return pos_type(off_type(-1)); 874 } 875# if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 876 if (fseek(__file_, __width > 0 ? __width * __off : 0, __whence)) 877 return pos_type(off_type(-1)); 878 pos_type __r = ftell(__file_); 879# else 880 if (::fseeko(__file_, __width > 0 ? __width * __off : 0, __whence)) 881 return pos_type(off_type(-1)); 882 pos_type __r = ftello(__file_); 883# endif 884 __r.state(__st_); 885 return __r; 886} 887 888template <class _CharT, class _Traits> 889typename basic_filebuf<_CharT, _Traits>::pos_type 890basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode) { 891 if (__file_ == nullptr || sync()) 892 return pos_type(off_type(-1)); 893# if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 894 if (fseek(__file_, __sp, SEEK_SET)) 895 return pos_type(off_type(-1)); 896# else 897 if (::fseeko(__file_, __sp, SEEK_SET)) 898 return pos_type(off_type(-1)); 899# endif 900 __st_ = __sp.state(); 901 return __sp; 902} 903 904template <class _CharT, class _Traits> 905int basic_filebuf<_CharT, _Traits>::sync() { 906 if (__file_ == nullptr) 907 return 0; 908 if (!__cv_) 909 __throw_bad_cast(); 910 911 if (__cm_ & ios_base::out) { 912 if (this->pptr() != this->pbase()) 913 if (overflow() == traits_type::eof()) 914 return -1; 915 codecvt_base::result __r; 916 do { 917 char* __extbe; 918 __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe); 919 size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); 920 if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) 921 return -1; 922 } while (__r == codecvt_base::partial); 923 if (__r == codecvt_base::error) 924 return -1; 925 if (fflush(__file_)) 926 return -1; 927 } else if (__cm_ & ios_base::in) { 928 off_type __c; 929 state_type __state = __st_last_; 930 bool __update_st = false; 931 if (__always_noconv_) 932 __c = this->egptr() - this->gptr(); 933 else { 934 int __width = __cv_->encoding(); 935 __c = __extbufend_ - __extbufnext_; 936 if (__width > 0) 937 __c += __width * (this->egptr() - this->gptr()); 938 else { 939 if (this->gptr() != this->egptr()) { 940 const int __off = __cv_->length(__state, __extbuf_, __extbufnext_, this->gptr() - this->eback()); 941 __c += __extbufnext_ - __extbuf_ - __off; 942 __update_st = true; 943 } 944 } 945 } 946# if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 947 if (fseek(__file_, -__c, SEEK_CUR)) 948 return -1; 949# else 950 if (::fseeko(__file_, -__c, SEEK_CUR)) 951 return -1; 952# endif 953 if (__update_st) 954 __st_ = __state; 955 __extbufnext_ = __extbufend_ = __extbuf_; 956 this->setg(nullptr, nullptr, nullptr); 957 __cm_ = 0; 958 } 959 return 0; 960} 961 962template <class _CharT, class _Traits> 963void basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc) { 964 sync(); 965 __cv_ = &std::use_facet<codecvt<char_type, char, state_type> >(__loc); 966 bool __old_anc = __always_noconv_; 967 __always_noconv_ = __cv_->always_noconv(); 968 if (__old_anc != __always_noconv_) { 969 this->setg(nullptr, nullptr, nullptr); 970 this->setp(nullptr, nullptr); 971 // invariant, char_type is char, else we couldn't get here 972 if (__always_noconv_) // need to dump __intbuf_ 973 { 974 if (__owns_eb_) 975 delete[] __extbuf_; 976 __owns_eb_ = __owns_ib_; 977 __ebs_ = __ibs_; 978 __extbuf_ = (char*)__intbuf_; 979 __ibs_ = 0; 980 __intbuf_ = nullptr; 981 __owns_ib_ = false; 982 } else // need to obtain an __intbuf_. 983 { // If __extbuf_ is user-supplied, use it, else new __intbuf_ 984 if (!__owns_eb_ && __extbuf_ != __extbuf_min_) { 985 __ibs_ = __ebs_; 986 __intbuf_ = (char_type*)__extbuf_; 987 __owns_ib_ = false; 988 __extbuf_ = new char[__ebs_]; 989 __owns_eb_ = true; 990 } else { 991 __ibs_ = __ebs_; 992 __intbuf_ = new char_type[__ibs_]; 993 __owns_ib_ = true; 994 } 995 } 996 } 997} 998 999template <class _CharT, class _Traits> 1000bool basic_filebuf<_CharT, _Traits>::__read_mode() { 1001 if (!(__cm_ & ios_base::in)) { 1002 this->setp(nullptr, nullptr); 1003 if (__always_noconv_) 1004 this->setg((char_type*)__extbuf_, (char_type*)__extbuf_ + __ebs_, (char_type*)__extbuf_ + __ebs_); 1005 else 1006 this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_); 1007 __cm_ = ios_base::in; 1008 return true; 1009 } 1010 return false; 1011} 1012 1013template <class _CharT, class _Traits> 1014void basic_filebuf<_CharT, _Traits>::__write_mode() { 1015 if (!(__cm_ & ios_base::out)) { 1016 this->setg(nullptr, nullptr, nullptr); 1017 if (__ebs_ > sizeof(__extbuf_min_)) { 1018 if (__always_noconv_) 1019 this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__ebs_ - 1)); 1020 else 1021 this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1)); 1022 } else 1023 this->setp(nullptr, nullptr); 1024 __cm_ = ios_base::out; 1025 } 1026} 1027 1028// basic_ifstream 1029 1030template <class _CharT, class _Traits> 1031class _LIBCPP_TEMPLATE_VIS basic_ifstream : public basic_istream<_CharT, _Traits> { 1032public: 1033 typedef _CharT char_type; 1034 typedef _Traits traits_type; 1035 typedef typename traits_type::int_type int_type; 1036 typedef typename traits_type::pos_type pos_type; 1037 typedef typename traits_type::off_type off_type; 1038 1039 _LIBCPP_HIDE_FROM_ABI basic_ifstream(); 1040 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in); 1041# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1042 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1043# endif 1044 _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in); 1045 _LIBCPP_HIDE_FROM_ABI basic_ifstream(basic_ifstream&& __rhs); 1046 _LIBCPP_HIDE_FROM_ABI basic_ifstream& operator=(basic_ifstream&& __rhs); 1047 _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream& __rhs); 1048 1049 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1050 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1051 void open(const char* __s, ios_base::openmode __mode = ios_base::in); 1052# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1053 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); 1054# endif 1055 void open(const string& __s, ios_base::openmode __mode = ios_base::in); 1056 1057 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1058 _LIBCPP_HIDE_FROM_ABI void close(); 1059 1060private: 1061 basic_filebuf<char_type, traits_type> __sb_; 1062}; 1063 1064template <class _CharT, class _Traits> 1065inline basic_ifstream<_CharT, _Traits>::basic_ifstream() : basic_istream<char_type, traits_type>(&__sb_) {} 1066 1067template <class _CharT, class _Traits> 1068inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode) 1069 : basic_istream<char_type, traits_type>(&__sb_) { 1070 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1071 this->setstate(ios_base::failbit); 1072} 1073 1074# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1075template <class _CharT, class _Traits> 1076inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode) 1077 : basic_istream<char_type, traits_type>(&__sb_) { 1078 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1079 this->setstate(ios_base::failbit); 1080} 1081# endif 1082 1083template <class _CharT, class _Traits> 1084inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode) 1085 : basic_istream<char_type, traits_type>(&__sb_) { 1086 if (__sb_.open(__s, __mode | ios_base::in) == nullptr) 1087 this->setstate(ios_base::failbit); 1088} 1089 1090template <class _CharT, class _Traits> 1091inline basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs) 1092 : basic_istream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1093 this->set_rdbuf(&__sb_); 1094} 1095 1096template <class _CharT, class _Traits> 1097inline basic_ifstream<_CharT, _Traits>& basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs) { 1098 basic_istream<char_type, traits_type>::operator=(std::move(__rhs)); 1099 __sb_ = std::move(__rhs.__sb_); 1100 return *this; 1101} 1102 1103template <class _CharT, class _Traits> 1104inline void basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs) { 1105 basic_istream<char_type, traits_type>::swap(__rhs); 1106 __sb_.swap(__rhs.__sb_); 1107} 1108 1109template <class _CharT, class _Traits> 1110inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y) { 1111 __x.swap(__y); 1112} 1113 1114template <class _CharT, class _Traits> 1115inline basic_filebuf<_CharT, _Traits>* basic_ifstream<_CharT, _Traits>::rdbuf() const { 1116 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_); 1117} 1118 1119template <class _CharT, class _Traits> 1120inline bool basic_ifstream<_CharT, _Traits>::is_open() const { 1121 return __sb_.is_open(); 1122} 1123 1124template <class _CharT, class _Traits> 1125void basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1126 if (__sb_.open(__s, __mode | ios_base::in)) 1127 this->clear(); 1128 else 1129 this->setstate(ios_base::failbit); 1130} 1131 1132# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1133template <class _CharT, class _Traits> 1134void basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1135 if (__sb_.open(__s, __mode | ios_base::in)) 1136 this->clear(); 1137 else 1138 this->setstate(ios_base::failbit); 1139} 1140# endif 1141 1142template <class _CharT, class _Traits> 1143void basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1144 if (__sb_.open(__s, __mode | ios_base::in)) 1145 this->clear(); 1146 else 1147 this->setstate(ios_base::failbit); 1148} 1149 1150template <class _CharT, class _Traits> 1151inline void basic_ifstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1152 if (__sb_.__open(__fd, __mode | ios_base::in)) 1153 this->clear(); 1154 else 1155 this->setstate(ios_base::failbit); 1156} 1157 1158template <class _CharT, class _Traits> 1159inline void basic_ifstream<_CharT, _Traits>::close() { 1160 if (__sb_.close() == 0) 1161 this->setstate(ios_base::failbit); 1162} 1163 1164// basic_ofstream 1165 1166template <class _CharT, class _Traits> 1167class _LIBCPP_TEMPLATE_VIS basic_ofstream : public basic_ostream<_CharT, _Traits> { 1168public: 1169 typedef _CharT char_type; 1170 typedef _Traits traits_type; 1171 typedef typename traits_type::int_type int_type; 1172 typedef typename traits_type::pos_type pos_type; 1173 typedef typename traits_type::off_type off_type; 1174 1175 _LIBCPP_HIDE_FROM_ABI basic_ofstream(); 1176 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out); 1177# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1178 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1179# endif 1180 _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out); 1181 1182 _LIBCPP_HIDE_FROM_ABI basic_ofstream(basic_ofstream&& __rhs); 1183 _LIBCPP_HIDE_FROM_ABI basic_ofstream& operator=(basic_ofstream&& __rhs); 1184 _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream& __rhs); 1185 1186 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1187 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1188 void open(const char* __s, ios_base::openmode __mode = ios_base::out); 1189# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1190 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); 1191# endif 1192 void open(const string& __s, ios_base::openmode __mode = ios_base::out); 1193 1194 _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); 1195 _LIBCPP_HIDE_FROM_ABI void close(); 1196 1197private: 1198 basic_filebuf<char_type, traits_type> __sb_; 1199}; 1200 1201template <class _CharT, class _Traits> 1202inline basic_ofstream<_CharT, _Traits>::basic_ofstream() : basic_ostream<char_type, traits_type>(&__sb_) {} 1203 1204template <class _CharT, class _Traits> 1205inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode) 1206 : basic_ostream<char_type, traits_type>(&__sb_) { 1207 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1208 this->setstate(ios_base::failbit); 1209} 1210 1211# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1212template <class _CharT, class _Traits> 1213inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode) 1214 : basic_ostream<char_type, traits_type>(&__sb_) { 1215 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1216 this->setstate(ios_base::failbit); 1217} 1218# endif 1219 1220template <class _CharT, class _Traits> 1221inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode) 1222 : basic_ostream<char_type, traits_type>(&__sb_) { 1223 if (__sb_.open(__s, __mode | ios_base::out) == nullptr) 1224 this->setstate(ios_base::failbit); 1225} 1226 1227template <class _CharT, class _Traits> 1228inline basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs) 1229 : basic_ostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1230 this->set_rdbuf(&__sb_); 1231} 1232 1233template <class _CharT, class _Traits> 1234inline basic_ofstream<_CharT, _Traits>& basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs) { 1235 basic_ostream<char_type, traits_type>::operator=(std::move(__rhs)); 1236 __sb_ = std::move(__rhs.__sb_); 1237 return *this; 1238} 1239 1240template <class _CharT, class _Traits> 1241inline void basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs) { 1242 basic_ostream<char_type, traits_type>::swap(__rhs); 1243 __sb_.swap(__rhs.__sb_); 1244} 1245 1246template <class _CharT, class _Traits> 1247inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y) { 1248 __x.swap(__y); 1249} 1250 1251template <class _CharT, class _Traits> 1252inline basic_filebuf<_CharT, _Traits>* basic_ofstream<_CharT, _Traits>::rdbuf() const { 1253 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_); 1254} 1255 1256template <class _CharT, class _Traits> 1257inline bool basic_ofstream<_CharT, _Traits>::is_open() const { 1258 return __sb_.is_open(); 1259} 1260 1261template <class _CharT, class _Traits> 1262void basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1263 if (__sb_.open(__s, __mode | ios_base::out)) 1264 this->clear(); 1265 else 1266 this->setstate(ios_base::failbit); 1267} 1268 1269# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1270template <class _CharT, class _Traits> 1271void basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1272 if (__sb_.open(__s, __mode | ios_base::out)) 1273 this->clear(); 1274 else 1275 this->setstate(ios_base::failbit); 1276} 1277# endif 1278 1279template <class _CharT, class _Traits> 1280void basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1281 if (__sb_.open(__s, __mode | ios_base::out)) 1282 this->clear(); 1283 else 1284 this->setstate(ios_base::failbit); 1285} 1286 1287template <class _CharT, class _Traits> 1288inline void basic_ofstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { 1289 if (__sb_.__open(__fd, __mode | ios_base::out)) 1290 this->clear(); 1291 else 1292 this->setstate(ios_base::failbit); 1293} 1294 1295template <class _CharT, class _Traits> 1296inline void basic_ofstream<_CharT, _Traits>::close() { 1297 if (__sb_.close() == nullptr) 1298 this->setstate(ios_base::failbit); 1299} 1300 1301// basic_fstream 1302 1303template <class _CharT, class _Traits> 1304class _LIBCPP_TEMPLATE_VIS basic_fstream : public basic_iostream<_CharT, _Traits> { 1305public: 1306 typedef _CharT char_type; 1307 typedef _Traits traits_type; 1308 typedef typename traits_type::int_type int_type; 1309 typedef typename traits_type::pos_type pos_type; 1310 typedef typename traits_type::off_type off_type; 1311 1312 _LIBCPP_HIDE_FROM_ABI basic_fstream(); 1313 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const char* __s, 1314 ios_base::openmode __mode = ios_base::in | ios_base::out); 1315# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1316 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const wchar_t* __s, 1317 ios_base::openmode __mode = ios_base::in | ios_base::out); 1318# endif 1319 _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const string& __s, 1320 ios_base::openmode __mode = ios_base::in | ios_base::out); 1321 1322 _LIBCPP_HIDE_FROM_ABI basic_fstream(basic_fstream&& __rhs); 1323 1324 _LIBCPP_HIDE_FROM_ABI basic_fstream& operator=(basic_fstream&& __rhs); 1325 1326 _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream& __rhs); 1327 1328 _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; 1329 _LIBCPP_HIDE_FROM_ABI bool is_open() const; 1330 _LIBCPP_HIDE_FROM_ABI void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1331# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1332 void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1333# endif 1334 _LIBCPP_HIDE_FROM_ABI void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); 1335 1336 _LIBCPP_HIDE_FROM_ABI void close(); 1337 1338private: 1339 basic_filebuf<char_type, traits_type> __sb_; 1340}; 1341 1342template <class _CharT, class _Traits> 1343inline basic_fstream<_CharT, _Traits>::basic_fstream() : basic_iostream<char_type, traits_type>(&__sb_) {} 1344 1345template <class _CharT, class _Traits> 1346inline basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode) 1347 : basic_iostream<char_type, traits_type>(&__sb_) { 1348 if (__sb_.open(__s, __mode) == nullptr) 1349 this->setstate(ios_base::failbit); 1350} 1351 1352# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1353template <class _CharT, class _Traits> 1354inline basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode) 1355 : basic_iostream<char_type, traits_type>(&__sb_) { 1356 if (__sb_.open(__s, __mode) == nullptr) 1357 this->setstate(ios_base::failbit); 1358} 1359# endif 1360 1361template <class _CharT, class _Traits> 1362inline basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode) 1363 : basic_iostream<char_type, traits_type>(&__sb_) { 1364 if (__sb_.open(__s, __mode) == nullptr) 1365 this->setstate(ios_base::failbit); 1366} 1367 1368template <class _CharT, class _Traits> 1369inline basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs) 1370 : basic_iostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { 1371 this->set_rdbuf(&__sb_); 1372} 1373 1374template <class _CharT, class _Traits> 1375inline basic_fstream<_CharT, _Traits>& basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs) { 1376 basic_iostream<char_type, traits_type>::operator=(std::move(__rhs)); 1377 __sb_ = std::move(__rhs.__sb_); 1378 return *this; 1379} 1380 1381template <class _CharT, class _Traits> 1382inline void basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs) { 1383 basic_iostream<char_type, traits_type>::swap(__rhs); 1384 __sb_.swap(__rhs.__sb_); 1385} 1386 1387template <class _CharT, class _Traits> 1388inline _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y) { 1389 __x.swap(__y); 1390} 1391 1392template <class _CharT, class _Traits> 1393inline basic_filebuf<_CharT, _Traits>* basic_fstream<_CharT, _Traits>::rdbuf() const { 1394 return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_); 1395} 1396 1397template <class _CharT, class _Traits> 1398inline bool basic_fstream<_CharT, _Traits>::is_open() const { 1399 return __sb_.is_open(); 1400} 1401 1402template <class _CharT, class _Traits> 1403void basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { 1404 if (__sb_.open(__s, __mode)) 1405 this->clear(); 1406 else 1407 this->setstate(ios_base::failbit); 1408} 1409 1410# ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR 1411template <class _CharT, class _Traits> 1412void basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { 1413 if (__sb_.open(__s, __mode)) 1414 this->clear(); 1415 else 1416 this->setstate(ios_base::failbit); 1417} 1418# endif 1419 1420template <class _CharT, class _Traits> 1421void basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { 1422 if (__sb_.open(__s, __mode)) 1423 this->clear(); 1424 else 1425 this->setstate(ios_base::failbit); 1426} 1427 1428template <class _CharT, class _Traits> 1429inline void basic_fstream<_CharT, _Traits>::close() { 1430 if (__sb_.close() == nullptr) 1431 this->setstate(ios_base::failbit); 1432} 1433 1434# if _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 1435extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>; 1436extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>; 1437extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>; 1438# endif 1439 1440_LIBCPP_END_NAMESPACE_STD 1441 1442#endif // _LIBCPP_HAS_NO_FILESYSTEM 1443 1444_LIBCPP_POP_MACROS 1445 1446#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) 1447# include <__cxx03/atomic> 1448# include <__cxx03/cstdlib> 1449# include <__cxx03/iosfwd> 1450# include <__cxx03/limits> 1451# include <__cxx03/mutex> 1452# include <__cxx03/new> 1453# include <__cxx03/stdexcept> 1454# include <__cxx03/type_traits> 1455#endif 1456 1457#endif // _LIBCPP___CXX03_FSTREAM 1458