1 //===-------------------------- ios.cpp -----------------------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
17 #include "include/config_elast.h"
24 #include "__undef_macros"
26 _LIBCPP_BEGIN_NAMESPACE_STD
28 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ios<char>;
29 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ios<wchar_t>;
31 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_streambuf<char>;
32 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_streambuf<wchar_t>;
34 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_istream<char>;
35 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_istream<wchar_t>;
37 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ostream<char>;
38 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ostream<wchar_t>;
40 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_iostream<char>;
42 class _LIBCPP_HIDDEN __iostream_category
46 virtual const char* name() const _NOEXCEPT;
47 virtual string message(int ev) const;
51 __iostream_category::name() const _NOEXCEPT
57 __iostream_category::message(int ev) const
59 if (ev != static_cast<int>(io_errc::stream)
61 && ev <= _LIBCPP_ELAST
62 #endif // _LIBCPP_ELAST
64 return __do_message::message(ev);
65 return string("unspecified iostream_category error");
69 iostream_category() _NOEXCEPT
71 static __iostream_category s;
77 ios_base::failure::failure(const string& msg, const error_code& ec)
78 : system_error(ec, msg)
82 ios_base::failure::failure(const char* msg, const error_code& ec)
83 : system_error(ec, msg)
87 ios_base::failure::~failure() throw()
93 const ios_base::fmtflags ios_base::boolalpha;
94 const ios_base::fmtflags ios_base::dec;
95 const ios_base::fmtflags ios_base::fixed;
96 const ios_base::fmtflags ios_base::hex;
97 const ios_base::fmtflags ios_base::internal;
98 const ios_base::fmtflags ios_base::left;
99 const ios_base::fmtflags ios_base::oct;
100 const ios_base::fmtflags ios_base::right;
101 const ios_base::fmtflags ios_base::scientific;
102 const ios_base::fmtflags ios_base::showbase;
103 const ios_base::fmtflags ios_base::showpoint;
104 const ios_base::fmtflags ios_base::showpos;
105 const ios_base::fmtflags ios_base::skipws;
106 const ios_base::fmtflags ios_base::unitbuf;
107 const ios_base::fmtflags ios_base::uppercase;
108 const ios_base::fmtflags ios_base::adjustfield;
109 const ios_base::fmtflags ios_base::basefield;
110 const ios_base::fmtflags ios_base::floatfield;
112 const ios_base::iostate ios_base::badbit;
113 const ios_base::iostate ios_base::eofbit;
114 const ios_base::iostate ios_base::failbit;
115 const ios_base::iostate ios_base::goodbit;
117 const ios_base::openmode ios_base::app;
118 const ios_base::openmode ios_base::ate;
119 const ios_base::openmode ios_base::binary;
120 const ios_base::openmode ios_base::in;
121 const ios_base::openmode ios_base::out;
122 const ios_base::openmode ios_base::trunc;
125 ios_base::__call_callbacks(event ev)
127 for (size_t i = __event_size_; i;)
130 __fn_[i](ev, *this, __index_[i]);
137 ios_base::imbue(const locale& newloc)
139 static_assert(sizeof(locale) == sizeof(__loc_), "");
140 locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
141 locale oldloc = loc_storage;
142 loc_storage = newloc;
143 __call_callbacks(imbue_event);
148 ios_base::getloc() const
150 const locale& loc_storage = *reinterpret_cast<const locale*>(&__loc_);
155 #if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
156 atomic<int> ios_base::__xindex_ = ATOMIC_VAR_INIT(0);
158 int ios_base::__xindex_ = 0;
161 template <typename _Tp>
162 static size_t __ios_new_cap(size_t __req_size, size_t __current_cap)
163 { // Precondition: __req_size > __current_cap
164 const size_t mx = std::numeric_limits<size_t>::max() / sizeof(_Tp);
165 if (__req_size < mx/2)
166 return _VSTD::max(2 * __current_cap, __req_size);
178 ios_base::iword(int index)
180 size_t req_size = static_cast<size_t>(index)+1;
181 if (req_size > __iarray_cap_)
183 size_t newcap = __ios_new_cap<long>(req_size, __iarray_cap_);
184 long* iarray = static_cast<long*>(realloc(__iarray_, newcap * sizeof(long)));
193 for (long* p = __iarray_ + __iarray_size_; p < __iarray_ + newcap; ++p)
195 __iarray_cap_ = newcap;
197 __iarray_size_ = max<size_t>(__iarray_size_, req_size);
198 return __iarray_[index];
202 ios_base::pword(int index)
204 size_t req_size = static_cast<size_t>(index)+1;
205 if (req_size > __parray_cap_)
207 size_t newcap = __ios_new_cap<void *>(req_size, __iarray_cap_);
208 void** parray = static_cast<void**>(realloc(__parray_, newcap * sizeof(void *)));
217 for (void** p = __parray_ + __parray_size_; p < __parray_ + newcap; ++p)
219 __parray_cap_ = newcap;
221 __parray_size_ = max<size_t>(__parray_size_, req_size);
222 return __parray_[index];
228 ios_base::register_callback(event_callback fn, int index)
230 size_t req_size = __event_size_ + 1;
231 if (req_size > __event_cap_)
233 size_t newcap = __ios_new_cap<event_callback>(req_size, __event_cap_);
234 event_callback* fns = static_cast<event_callback*>(realloc(__fn_, newcap * sizeof(event_callback)));
238 int* indxs = static_cast<int *>(realloc(__index_, newcap * sizeof(int)));
242 __event_cap_ = newcap;
244 __fn_[__event_size_] = fn;
245 __index_[__event_size_] = index;
249 ios_base::~ios_base()
251 __call_callbacks(erase_event);
252 locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
253 loc_storage.~locale();
263 ios_base::clear(iostate state)
268 __rdstate_ = state | badbit;
270 if (((state | (__rdbuf_ ? goodbit : badbit)) & __exceptions_) != 0)
271 __throw_failure("ios_base::clear");
277 ios_base::init(void* sb)
280 __rdstate_ = __rdbuf_ ? goodbit : badbit;
281 __exceptions_ = goodbit;
282 __fmtflags_ = skipws | dec;
295 ::new(&__loc_) locale;
299 ios_base::copyfmt(const ios_base& rhs)
301 // If we can't acquire the needed resources, throw bad_alloc (can't set badbit)
302 // Don't alter *this until all needed resources are acquired
303 unique_ptr<event_callback, void (*)(void*)> new_callbacks(0, free);
304 unique_ptr<int, void (*)(void*)> new_ints(0, free);
305 unique_ptr<long, void (*)(void*)> new_longs(0, free);
306 unique_ptr<void*, void (*)(void*)> new_pointers(0, free);
307 if (__event_cap_ < rhs.__event_size_)
309 size_t newesize = sizeof(event_callback) * rhs.__event_size_;
310 new_callbacks.reset(static_cast<event_callback*>(malloc(newesize)));
314 size_t newisize = sizeof(int) * rhs.__event_size_;
315 new_ints.reset(static_cast<int *>(malloc(newisize)));
319 if (__iarray_cap_ < rhs.__iarray_size_)
321 size_t newsize = sizeof(long) * rhs.__iarray_size_;
322 new_longs.reset(static_cast<long*>(malloc(newsize)));
326 if (__parray_cap_ < rhs.__parray_size_)
328 size_t newsize = sizeof(void*) * rhs.__parray_size_;
329 new_pointers.reset(static_cast<void**>(malloc(newsize)));
333 // Got everything we need. Copy everything but __rdstate_, __rdbuf_ and __exceptions_
334 __fmtflags_ = rhs.__fmtflags_;
335 __precision_ = rhs.__precision_;
336 __width_ = rhs.__width_;
337 locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
338 const locale& rhs_loc = *reinterpret_cast<const locale*>(&rhs.__loc_);
340 if (__event_cap_ < rhs.__event_size_)
343 __fn_ = new_callbacks.release();
345 __index_ = new_ints.release();
346 __event_cap_ = rhs.__event_size_;
348 for (__event_size_ = 0; __event_size_ < rhs.__event_size_; ++__event_size_)
350 __fn_[__event_size_] = rhs.__fn_[__event_size_];
351 __index_[__event_size_] = rhs.__index_[__event_size_];
353 if (__iarray_cap_ < rhs.__iarray_size_)
356 __iarray_ = new_longs.release();
357 __iarray_cap_ = rhs.__iarray_size_;
359 for (__iarray_size_ = 0; __iarray_size_ < rhs.__iarray_size_; ++__iarray_size_)
360 __iarray_[__iarray_size_] = rhs.__iarray_[__iarray_size_];
361 if (__parray_cap_ < rhs.__parray_size_)
364 __parray_ = new_pointers.release();
365 __parray_cap_ = rhs.__parray_size_;
367 for (__parray_size_ = 0; __parray_size_ < rhs.__parray_size_; ++__parray_size_)
368 __parray_[__parray_size_] = rhs.__parray_[__parray_size_];
372 ios_base::move(ios_base& rhs)
374 // *this is uninitialized
375 __fmtflags_ = rhs.__fmtflags_;
376 __precision_ = rhs.__precision_;
377 __width_ = rhs.__width_;
378 __rdstate_ = rhs.__rdstate_;
379 __exceptions_ = rhs.__exceptions_;
381 locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
382 ::new(&__loc_) locale(rhs_loc);
385 __index_ = rhs.__index_;
387 __event_size_ = rhs.__event_size_;
388 rhs.__event_size_ = 0;
389 __event_cap_ = rhs.__event_cap_;
390 rhs.__event_cap_ = 0;
391 __iarray_ = rhs.__iarray_;
393 __iarray_size_ = rhs.__iarray_size_;
394 rhs.__iarray_size_ = 0;
395 __iarray_cap_ = rhs.__iarray_cap_;
396 rhs.__iarray_cap_ = 0;
397 __parray_ = rhs.__parray_;
399 __parray_size_ = rhs.__parray_size_;
400 rhs.__parray_size_ = 0;
401 __parray_cap_ = rhs.__parray_cap_;
402 rhs.__parray_cap_ = 0;
406 ios_base::swap(ios_base& rhs) _NOEXCEPT
408 _VSTD::swap(__fmtflags_, rhs.__fmtflags_);
409 _VSTD::swap(__precision_, rhs.__precision_);
410 _VSTD::swap(__width_, rhs.__width_);
411 _VSTD::swap(__rdstate_, rhs.__rdstate_);
412 _VSTD::swap(__exceptions_, rhs.__exceptions_);
413 locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
414 locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
415 _VSTD::swap(lhs_loc, rhs_loc);
416 _VSTD::swap(__fn_, rhs.__fn_);
417 _VSTD::swap(__index_, rhs.__index_);
418 _VSTD::swap(__event_size_, rhs.__event_size_);
419 _VSTD::swap(__event_cap_, rhs.__event_cap_);
420 _VSTD::swap(__iarray_, rhs.__iarray_);
421 _VSTD::swap(__iarray_size_, rhs.__iarray_size_);
422 _VSTD::swap(__iarray_cap_, rhs.__iarray_cap_);
423 _VSTD::swap(__parray_, rhs.__parray_);
424 _VSTD::swap(__parray_size_, rhs.__parray_size_);
425 _VSTD::swap(__parray_cap_, rhs.__parray_cap_);
429 ios_base::__set_badbit_and_consider_rethrow()
431 __rdstate_ |= badbit;
432 #ifndef _LIBCPP_NO_EXCEPTIONS
433 if (__exceptions_ & badbit)
435 #endif // _LIBCPP_NO_EXCEPTIONS
439 ios_base::__set_failbit_and_consider_rethrow()
441 __rdstate_ |= failbit;
442 #ifndef _LIBCPP_NO_EXCEPTIONS
443 if (__exceptions_ & failbit)
445 #endif // _LIBCPP_NO_EXCEPTIONS
449 ios_base::sync_with_stdio(bool sync)
451 static bool previous_state = true;
452 bool r = previous_state;
453 previous_state = sync;
457 _LIBCPP_END_NAMESPACE_STD