1 //===-------------------------- ios.cpp -----------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "__config"
11
12 #include "ios"
13
14 #include <stdlib.h>
15
16 #include "__locale"
17 #include "algorithm"
18 #include "include/config_elast.h"
19 #include "istream"
20 #include "limits"
21 #include "memory"
22 #include "new"
23 #include "streambuf"
24 #include "string"
25 #include "__undef_macros"
26
27 _LIBCPP_BEGIN_NAMESPACE_STD
28
29 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ios<char>;
30 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ios<wchar_t>;
31
32 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_streambuf<char>;
33 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_streambuf<wchar_t>;
34
35 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_istream<char>;
36 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_istream<wchar_t>;
37
38 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ostream<char>;
39 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ostream<wchar_t>;
40
41 template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_iostream<char>;
42
43 class _LIBCPP_HIDDEN __iostream_category
44 : public __do_message
45 {
46 public:
47 virtual const char* name() const _NOEXCEPT;
48 virtual string message(int ev) const;
49 };
50
51 const char*
name() const52 __iostream_category::name() const _NOEXCEPT
53 {
54 return "iostream";
55 }
56
57 string
message(int ev) const58 __iostream_category::message(int ev) const
59 {
60 if (ev != static_cast<int>(io_errc::stream)
61 #ifdef _LIBCPP_ELAST
62 && ev <= _LIBCPP_ELAST
63 #endif // _LIBCPP_ELAST
64 )
65 return __do_message::message(ev);
66 return string("unspecified iostream_category error");
67 }
68
69 const error_category&
iostream_category()70 iostream_category() _NOEXCEPT
71 {
72 static __iostream_category s;
73 return s;
74 }
75
76 // ios_base::failure
77
failure(const string & msg,const error_code & ec)78 ios_base::failure::failure(const string& msg, const error_code& ec)
79 : system_error(ec, msg)
80 {
81 }
82
failure(const char * msg,const error_code & ec)83 ios_base::failure::failure(const char* msg, const error_code& ec)
84 : system_error(ec, msg)
85 {
86 }
87
~failure()88 ios_base::failure::~failure() throw()
89 {
90 }
91
92 // ios_base locale
93
94 const ios_base::fmtflags ios_base::boolalpha;
95 const ios_base::fmtflags ios_base::dec;
96 const ios_base::fmtflags ios_base::fixed;
97 const ios_base::fmtflags ios_base::hex;
98 const ios_base::fmtflags ios_base::internal;
99 const ios_base::fmtflags ios_base::left;
100 const ios_base::fmtflags ios_base::oct;
101 const ios_base::fmtflags ios_base::right;
102 const ios_base::fmtflags ios_base::scientific;
103 const ios_base::fmtflags ios_base::showbase;
104 const ios_base::fmtflags ios_base::showpoint;
105 const ios_base::fmtflags ios_base::showpos;
106 const ios_base::fmtflags ios_base::skipws;
107 const ios_base::fmtflags ios_base::unitbuf;
108 const ios_base::fmtflags ios_base::uppercase;
109 const ios_base::fmtflags ios_base::adjustfield;
110 const ios_base::fmtflags ios_base::basefield;
111 const ios_base::fmtflags ios_base::floatfield;
112
113 const ios_base::iostate ios_base::badbit;
114 const ios_base::iostate ios_base::eofbit;
115 const ios_base::iostate ios_base::failbit;
116 const ios_base::iostate ios_base::goodbit;
117
118 const ios_base::openmode ios_base::app;
119 const ios_base::openmode ios_base::ate;
120 const ios_base::openmode ios_base::binary;
121 const ios_base::openmode ios_base::in;
122 const ios_base::openmode ios_base::out;
123 const ios_base::openmode ios_base::trunc;
124
125 void
__call_callbacks(event ev)126 ios_base::__call_callbacks(event ev)
127 {
128 for (size_t i = __event_size_; i;)
129 {
130 --i;
131 __fn_[i](ev, *this, __index_[i]);
132 }
133 }
134
135 // locale
136
137 locale
imbue(const locale & newloc)138 ios_base::imbue(const locale& newloc)
139 {
140 static_assert(sizeof(locale) == sizeof(__loc_), "");
141 locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
142 locale oldloc = loc_storage;
143 loc_storage = newloc;
144 __call_callbacks(imbue_event);
145 return oldloc;
146 }
147
148 locale
getloc() const149 ios_base::getloc() const
150 {
151 const locale& loc_storage = *reinterpret_cast<const locale*>(&__loc_);
152 return loc_storage;
153 }
154
155 // xalloc
156 #if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
157 atomic<int> ios_base::__xindex_ = ATOMIC_VAR_INIT(0);
158 #else
159 int ios_base::__xindex_ = 0;
160 #endif
161
162 template <typename _Tp>
__ios_new_cap(size_t __req_size,size_t __current_cap)163 static size_t __ios_new_cap(size_t __req_size, size_t __current_cap)
164 { // Precondition: __req_size > __current_cap
165 const size_t mx = std::numeric_limits<size_t>::max() / sizeof(_Tp);
166 if (__req_size < mx/2)
167 return _VSTD::max(2 * __current_cap, __req_size);
168 else
169 return mx;
170 }
171
172 int
xalloc()173 ios_base::xalloc()
174 {
175 return __xindex_++;
176 }
177
178 long&
iword(int index)179 ios_base::iword(int index)
180 {
181 size_t req_size = static_cast<size_t>(index)+1;
182 if (req_size > __iarray_cap_)
183 {
184 size_t newcap = __ios_new_cap<long>(req_size, __iarray_cap_);
185 long* iarray = static_cast<long*>(realloc(__iarray_, newcap * sizeof(long)));
186 if (iarray == 0)
187 {
188 setstate(badbit);
189 static long error;
190 error = 0;
191 return error;
192 }
193 __iarray_ = iarray;
194 for (long* p = __iarray_ + __iarray_size_; p < __iarray_ + newcap; ++p)
195 *p = 0;
196 __iarray_cap_ = newcap;
197 }
198 __iarray_size_ = max<size_t>(__iarray_size_, req_size);
199 return __iarray_[index];
200 }
201
202 void*&
pword(int index)203 ios_base::pword(int index)
204 {
205 size_t req_size = static_cast<size_t>(index)+1;
206 if (req_size > __parray_cap_)
207 {
208 size_t newcap = __ios_new_cap<void *>(req_size, __iarray_cap_);
209 void** parray = static_cast<void**>(realloc(__parray_, newcap * sizeof(void *)));
210 if (parray == 0)
211 {
212 setstate(badbit);
213 static void* error;
214 error = 0;
215 return error;
216 }
217 __parray_ = parray;
218 for (void** p = __parray_ + __parray_size_; p < __parray_ + newcap; ++p)
219 *p = 0;
220 __parray_cap_ = newcap;
221 }
222 __parray_size_ = max<size_t>(__parray_size_, req_size);
223 return __parray_[index];
224 }
225
226 // register_callback
227
228 void
register_callback(event_callback fn,int index)229 ios_base::register_callback(event_callback fn, int index)
230 {
231 size_t req_size = __event_size_ + 1;
232 if (req_size > __event_cap_)
233 {
234 size_t newcap = __ios_new_cap<event_callback>(req_size, __event_cap_);
235 event_callback* fns = static_cast<event_callback*>(realloc(__fn_, newcap * sizeof(event_callback)));
236 if (fns == 0)
237 setstate(badbit);
238 __fn_ = fns;
239 int* indxs = static_cast<int *>(realloc(__index_, newcap * sizeof(int)));
240 if (indxs == 0)
241 setstate(badbit);
242 __index_ = indxs;
243 __event_cap_ = newcap;
244 }
245 __fn_[__event_size_] = fn;
246 __index_[__event_size_] = index;
247 ++__event_size_;
248 }
249
~ios_base()250 ios_base::~ios_base()
251 {
252 __call_callbacks(erase_event);
253 locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
254 loc_storage.~locale();
255 free(__fn_);
256 free(__index_);
257 free(__iarray_);
258 free(__parray_);
259 }
260
261 // iostate
262
263 void
clear(iostate state)264 ios_base::clear(iostate state)
265 {
266 if (__rdbuf_)
267 __rdstate_ = state;
268 else
269 __rdstate_ = state | badbit;
270 #ifndef _LIBCPP_NO_EXCEPTIONS
271 if (((state | (__rdbuf_ ? goodbit : badbit)) & __exceptions_) != 0)
272 throw failure("ios_base::clear");
273 #endif // _LIBCPP_NO_EXCEPTIONS
274 }
275
276 // init
277
278 void
init(void * sb)279 ios_base::init(void* sb)
280 {
281 __rdbuf_ = sb;
282 __rdstate_ = __rdbuf_ ? goodbit : badbit;
283 __exceptions_ = goodbit;
284 __fmtflags_ = skipws | dec;
285 __width_ = 0;
286 __precision_ = 6;
287 __fn_ = 0;
288 __index_ = 0;
289 __event_size_ = 0;
290 __event_cap_ = 0;
291 __iarray_ = 0;
292 __iarray_size_ = 0;
293 __iarray_cap_ = 0;
294 __parray_ = 0;
295 __parray_size_ = 0;
296 __parray_cap_ = 0;
297 ::new(&__loc_) locale;
298 }
299
300 void
copyfmt(const ios_base & rhs)301 ios_base::copyfmt(const ios_base& rhs)
302 {
303 // If we can't acquire the needed resources, throw bad_alloc (can't set badbit)
304 // Don't alter *this until all needed resources are acquired
305 unique_ptr<event_callback, void (*)(void*)> new_callbacks(0, free);
306 unique_ptr<int, void (*)(void*)> new_ints(0, free);
307 unique_ptr<long, void (*)(void*)> new_longs(0, free);
308 unique_ptr<void*, void (*)(void*)> new_pointers(0, free);
309 if (__event_cap_ < rhs.__event_size_)
310 {
311 size_t newesize = sizeof(event_callback) * rhs.__event_size_;
312 new_callbacks.reset(static_cast<event_callback*>(malloc(newesize)));
313 #ifndef _LIBCPP_NO_EXCEPTIONS
314 if (!new_callbacks)
315 throw bad_alloc();
316 #endif // _LIBCPP_NO_EXCEPTIONS
317
318 size_t newisize = sizeof(int) * rhs.__event_size_;
319 new_ints.reset(static_cast<int *>(malloc(newisize)));
320 #ifndef _LIBCPP_NO_EXCEPTIONS
321 if (!new_ints)
322 throw bad_alloc();
323 #endif // _LIBCPP_NO_EXCEPTIONS
324 }
325 if (__iarray_cap_ < rhs.__iarray_size_)
326 {
327 size_t newsize = sizeof(long) * rhs.__iarray_size_;
328 new_longs.reset(static_cast<long*>(malloc(newsize)));
329 #ifndef _LIBCPP_NO_EXCEPTIONS
330 if (!new_longs)
331 throw bad_alloc();
332 #endif // _LIBCPP_NO_EXCEPTIONS
333 }
334 if (__parray_cap_ < rhs.__parray_size_)
335 {
336 size_t newsize = sizeof(void*) * rhs.__parray_size_;
337 new_pointers.reset(static_cast<void**>(malloc(newsize)));
338 #ifndef _LIBCPP_NO_EXCEPTIONS
339 if (!new_pointers)
340 throw bad_alloc();
341 #endif // _LIBCPP_NO_EXCEPTIONS
342 }
343 // Got everything we need. Copy everything but __rdstate_, __rdbuf_ and __exceptions_
344 __fmtflags_ = rhs.__fmtflags_;
345 __precision_ = rhs.__precision_;
346 __width_ = rhs.__width_;
347 locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
348 const locale& rhs_loc = *reinterpret_cast<const locale*>(&rhs.__loc_);
349 lhs_loc = rhs_loc;
350 if (__event_cap_ < rhs.__event_size_)
351 {
352 free(__fn_);
353 __fn_ = new_callbacks.release();
354 free(__index_);
355 __index_ = new_ints.release();
356 __event_cap_ = rhs.__event_size_;
357 }
358 for (__event_size_ = 0; __event_size_ < rhs.__event_size_; ++__event_size_)
359 {
360 __fn_[__event_size_] = rhs.__fn_[__event_size_];
361 __index_[__event_size_] = rhs.__index_[__event_size_];
362 }
363 if (__iarray_cap_ < rhs.__iarray_size_)
364 {
365 free(__iarray_);
366 __iarray_ = new_longs.release();
367 __iarray_cap_ = rhs.__iarray_size_;
368 }
369 for (__iarray_size_ = 0; __iarray_size_ < rhs.__iarray_size_; ++__iarray_size_)
370 __iarray_[__iarray_size_] = rhs.__iarray_[__iarray_size_];
371 if (__parray_cap_ < rhs.__parray_size_)
372 {
373 free(__parray_);
374 __parray_ = new_pointers.release();
375 __parray_cap_ = rhs.__parray_size_;
376 }
377 for (__parray_size_ = 0; __parray_size_ < rhs.__parray_size_; ++__parray_size_)
378 __parray_[__parray_size_] = rhs.__parray_[__parray_size_];
379 }
380
381 void
move(ios_base & rhs)382 ios_base::move(ios_base& rhs)
383 {
384 // *this is uninitialized
385 __fmtflags_ = rhs.__fmtflags_;
386 __precision_ = rhs.__precision_;
387 __width_ = rhs.__width_;
388 __rdstate_ = rhs.__rdstate_;
389 __exceptions_ = rhs.__exceptions_;
390 __rdbuf_ = 0;
391 locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
392 ::new(&__loc_) locale(rhs_loc);
393 __fn_ = rhs.__fn_;
394 rhs.__fn_ = 0;
395 __index_ = rhs.__index_;
396 rhs.__index_ = 0;
397 __event_size_ = rhs.__event_size_;
398 rhs.__event_size_ = 0;
399 __event_cap_ = rhs.__event_cap_;
400 rhs.__event_cap_ = 0;
401 __iarray_ = rhs.__iarray_;
402 rhs.__iarray_ = 0;
403 __iarray_size_ = rhs.__iarray_size_;
404 rhs.__iarray_size_ = 0;
405 __iarray_cap_ = rhs.__iarray_cap_;
406 rhs.__iarray_cap_ = 0;
407 __parray_ = rhs.__parray_;
408 rhs.__parray_ = 0;
409 __parray_size_ = rhs.__parray_size_;
410 rhs.__parray_size_ = 0;
411 __parray_cap_ = rhs.__parray_cap_;
412 rhs.__parray_cap_ = 0;
413 }
414
415 void
swap(ios_base & rhs)416 ios_base::swap(ios_base& rhs) _NOEXCEPT
417 {
418 _VSTD::swap(__fmtflags_, rhs.__fmtflags_);
419 _VSTD::swap(__precision_, rhs.__precision_);
420 _VSTD::swap(__width_, rhs.__width_);
421 _VSTD::swap(__rdstate_, rhs.__rdstate_);
422 _VSTD::swap(__exceptions_, rhs.__exceptions_);
423 locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
424 locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
425 _VSTD::swap(lhs_loc, rhs_loc);
426 _VSTD::swap(__fn_, rhs.__fn_);
427 _VSTD::swap(__index_, rhs.__index_);
428 _VSTD::swap(__event_size_, rhs.__event_size_);
429 _VSTD::swap(__event_cap_, rhs.__event_cap_);
430 _VSTD::swap(__iarray_, rhs.__iarray_);
431 _VSTD::swap(__iarray_size_, rhs.__iarray_size_);
432 _VSTD::swap(__iarray_cap_, rhs.__iarray_cap_);
433 _VSTD::swap(__parray_, rhs.__parray_);
434 _VSTD::swap(__parray_size_, rhs.__parray_size_);
435 _VSTD::swap(__parray_cap_, rhs.__parray_cap_);
436 }
437
438 void
__set_badbit_and_consider_rethrow()439 ios_base::__set_badbit_and_consider_rethrow()
440 {
441 __rdstate_ |= badbit;
442 #ifndef _LIBCPP_NO_EXCEPTIONS
443 if (__exceptions_ & badbit)
444 throw;
445 #endif // _LIBCPP_NO_EXCEPTIONS
446 }
447
448 void
__set_failbit_and_consider_rethrow()449 ios_base::__set_failbit_and_consider_rethrow()
450 {
451 __rdstate_ |= failbit;
452 #ifndef _LIBCPP_NO_EXCEPTIONS
453 if (__exceptions_ & failbit)
454 throw;
455 #endif // _LIBCPP_NO_EXCEPTIONS
456 }
457
458 bool
sync_with_stdio(bool sync)459 ios_base::sync_with_stdio(bool sync)
460 {
461 static bool previous_state = true;
462 bool r = previous_state;
463 previous_state = sync;
464 return r;
465 }
466
467 _LIBCPP_END_NAMESPACE_STD
468