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
26 _LIBCPP_BEGIN_NAMESPACE_STD
27
28 template class basic_ios<char>;
29 template class basic_ios<wchar_t>;
30
31 template class basic_streambuf<char>;
32 template class basic_streambuf<wchar_t>;
33
34 template class basic_istream<char>;
35 template class basic_istream<wchar_t>;
36
37 template class basic_ostream<char>;
38 template class basic_ostream<wchar_t>;
39
40 template class basic_iostream<char>;
41
42 class _LIBCPP_HIDDEN __iostream_category
43 : public __do_message
44 {
45 public:
46 virtual const char* name() const _NOEXCEPT;
47 virtual string message(int ev) const;
48 };
49
50 const char*
name() const51 __iostream_category::name() const _NOEXCEPT
52 {
53 return "iostream";
54 }
55
56 string
message(int ev) const57 __iostream_category::message(int ev) const
58 {
59 if (ev != static_cast<int>(io_errc::stream)
60 #ifdef _LIBCPP_ELAST
61 && ev <= _LIBCPP_ELAST
62 #endif // _LIBCPP_ELAST
63 )
64 return __do_message::message(ev);
65 return string("unspecified iostream_category error");
66 }
67
68 const error_category&
iostream_category()69 iostream_category() _NOEXCEPT
70 {
71 static __iostream_category s;
72 return s;
73 }
74
75 // ios_base::failure
76
failure(const string & msg,const error_code & ec)77 ios_base::failure::failure(const string& msg, const error_code& ec)
78 : system_error(ec, msg)
79 {
80 }
81
failure(const char * msg,const error_code & ec)82 ios_base::failure::failure(const char* msg, const error_code& ec)
83 : system_error(ec, msg)
84 {
85 }
86
~failure()87 ios_base::failure::~failure() throw()
88 {
89 }
90
91 // ios_base locale
92
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;
111
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;
116
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;
123
124 void
__call_callbacks(event ev)125 ios_base::__call_callbacks(event ev)
126 {
127 for (size_t i = __event_size_; i;)
128 {
129 --i;
130 __fn_[i](ev, *this, __index_[i]);
131 }
132 }
133
134 // locale
135
136 locale
imbue(const locale & newloc)137 ios_base::imbue(const locale& newloc)
138 {
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);
144 return oldloc;
145 }
146
147 locale
getloc() const148 ios_base::getloc() const
149 {
150 const locale& loc_storage = *reinterpret_cast<const locale*>(&__loc_);
151 return loc_storage;
152 }
153
154 // xalloc
155 #if defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_NO_THREADS)
156 atomic<int> ios_base::__xindex_ = ATOMIC_VAR_INIT(0);
157 #else
158 int ios_base::__xindex_ = 0;
159 #endif
160
161 template <typename _Tp>
__ios_new_cap(size_t __req_size,size_t __current_cap)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);
167 else
168 return mx;
169 }
170
171 int
xalloc()172 ios_base::xalloc()
173 {
174 return __xindex_++;
175 }
176
177 long&
iword(int index)178 ios_base::iword(int index)
179 {
180 size_t req_size = static_cast<size_t>(index)+1;
181 if (req_size > __iarray_cap_)
182 {
183 size_t newcap = __ios_new_cap<long>(req_size, __iarray_cap_);
184 long* iarray = static_cast<long*>(realloc(__iarray_, newcap * sizeof(long)));
185 if (iarray == 0)
186 {
187 setstate(badbit);
188 static long error;
189 error = 0;
190 return error;
191 }
192 __iarray_ = iarray;
193 for (long* p = __iarray_ + __iarray_size_; p < __iarray_ + newcap; ++p)
194 *p = 0;
195 __iarray_cap_ = newcap;
196 }
197 __iarray_size_ = max<size_t>(__iarray_size_, req_size);
198 return __iarray_[index];
199 }
200
201 void*&
pword(int index)202 ios_base::pword(int index)
203 {
204 size_t req_size = static_cast<size_t>(index)+1;
205 if (req_size > __parray_cap_)
206 {
207 size_t newcap = __ios_new_cap<void *>(req_size, __iarray_cap_);
208 void** parray = static_cast<void**>(realloc(__parray_, newcap * sizeof(void *)));
209 if (parray == 0)
210 {
211 setstate(badbit);
212 static void* error;
213 error = 0;
214 return error;
215 }
216 __parray_ = parray;
217 for (void** p = __parray_ + __parray_size_; p < __parray_ + newcap; ++p)
218 *p = 0;
219 __parray_cap_ = newcap;
220 }
221 __parray_size_ = max<size_t>(__parray_size_, req_size);
222 return __parray_[index];
223 }
224
225 // register_callback
226
227 void
register_callback(event_callback fn,int index)228 ios_base::register_callback(event_callback fn, int index)
229 {
230 size_t req_size = __event_size_ + 1;
231 if (req_size > __event_cap_)
232 {
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)));
235 if (fns == 0)
236 setstate(badbit);
237 __fn_ = fns;
238 int* indxs = static_cast<int *>(realloc(__index_, newcap * sizeof(int)));
239 if (indxs == 0)
240 setstate(badbit);
241 __index_ = indxs;
242 __event_cap_ = newcap;
243 }
244 __fn_[__event_size_] = fn;
245 __index_[__event_size_] = index;
246 ++__event_size_;
247 }
248
~ios_base()249 ios_base::~ios_base()
250 {
251 __call_callbacks(erase_event);
252 locale& loc_storage = *reinterpret_cast<locale*>(&__loc_);
253 loc_storage.~locale();
254 free(__fn_);
255 free(__index_);
256 free(__iarray_);
257 free(__parray_);
258 }
259
260 // iostate
261
262 void
clear(iostate state)263 ios_base::clear(iostate state)
264 {
265 if (__rdbuf_)
266 __rdstate_ = state;
267 else
268 __rdstate_ = state | badbit;
269 #ifndef _LIBCPP_NO_EXCEPTIONS
270 if (((state | (__rdbuf_ ? goodbit : badbit)) & __exceptions_) != 0)
271 throw failure("ios_base::clear");
272 #endif // _LIBCPP_NO_EXCEPTIONS
273 }
274
275 // init
276
277 void
init(void * sb)278 ios_base::init(void* sb)
279 {
280 __rdbuf_ = sb;
281 __rdstate_ = __rdbuf_ ? goodbit : badbit;
282 __exceptions_ = goodbit;
283 __fmtflags_ = skipws | dec;
284 __width_ = 0;
285 __precision_ = 6;
286 __fn_ = 0;
287 __index_ = 0;
288 __event_size_ = 0;
289 __event_cap_ = 0;
290 __iarray_ = 0;
291 __iarray_size_ = 0;
292 __iarray_cap_ = 0;
293 __parray_ = 0;
294 __parray_size_ = 0;
295 __parray_cap_ = 0;
296 ::new(&__loc_) locale;
297 }
298
299 void
copyfmt(const ios_base & rhs)300 ios_base::copyfmt(const ios_base& rhs)
301 {
302 // If we can't acquire the needed resources, throw bad_alloc (can't set badbit)
303 // Don't alter *this until all needed resources are acquired
304 unique_ptr<event_callback, void (*)(void*)> new_callbacks(0, free);
305 unique_ptr<int, void (*)(void*)> new_ints(0, free);
306 unique_ptr<long, void (*)(void*)> new_longs(0, free);
307 unique_ptr<void*, void (*)(void*)> new_pointers(0, free);
308 if (__event_cap_ < rhs.__event_size_)
309 {
310 size_t newesize = sizeof(event_callback) * rhs.__event_size_;
311 new_callbacks.reset(static_cast<event_callback*>(malloc(newesize)));
312 #ifndef _LIBCPP_NO_EXCEPTIONS
313 if (!new_callbacks)
314 throw bad_alloc();
315 #endif // _LIBCPP_NO_EXCEPTIONS
316
317 size_t newisize = sizeof(int) * rhs.__event_size_;
318 new_ints.reset(static_cast<int *>(malloc(newisize)));
319 #ifndef _LIBCPP_NO_EXCEPTIONS
320 if (!new_ints)
321 throw bad_alloc();
322 #endif // _LIBCPP_NO_EXCEPTIONS
323 }
324 if (__iarray_cap_ < rhs.__iarray_size_)
325 {
326 size_t newsize = sizeof(long) * rhs.__iarray_size_;
327 new_longs.reset(static_cast<long*>(malloc(newsize)));
328 #ifndef _LIBCPP_NO_EXCEPTIONS
329 if (!new_longs)
330 throw bad_alloc();
331 #endif // _LIBCPP_NO_EXCEPTIONS
332 }
333 if (__parray_cap_ < rhs.__parray_size_)
334 {
335 size_t newsize = sizeof(void*) * rhs.__parray_size_;
336 new_pointers.reset(static_cast<void**>(malloc(newsize)));
337 #ifndef _LIBCPP_NO_EXCEPTIONS
338 if (!new_pointers)
339 throw bad_alloc();
340 #endif // _LIBCPP_NO_EXCEPTIONS
341 }
342 // Got everything we need. Copy everything but __rdstate_, __rdbuf_ and __exceptions_
343 __fmtflags_ = rhs.__fmtflags_;
344 __precision_ = rhs.__precision_;
345 __width_ = rhs.__width_;
346 locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
347 const locale& rhs_loc = *reinterpret_cast<const locale*>(&rhs.__loc_);
348 lhs_loc = rhs_loc;
349 if (__event_cap_ < rhs.__event_size_)
350 {
351 free(__fn_);
352 __fn_ = new_callbacks.release();
353 free(__index_);
354 __index_ = new_ints.release();
355 __event_cap_ = rhs.__event_size_;
356 }
357 for (__event_size_ = 0; __event_size_ < rhs.__event_size_; ++__event_size_)
358 {
359 __fn_[__event_size_] = rhs.__fn_[__event_size_];
360 __index_[__event_size_] = rhs.__index_[__event_size_];
361 }
362 if (__iarray_cap_ < rhs.__iarray_size_)
363 {
364 free(__iarray_);
365 __iarray_ = new_longs.release();
366 __iarray_cap_ = rhs.__iarray_size_;
367 }
368 for (__iarray_size_ = 0; __iarray_size_ < rhs.__iarray_size_; ++__iarray_size_)
369 __iarray_[__iarray_size_] = rhs.__iarray_[__iarray_size_];
370 if (__parray_cap_ < rhs.__parray_size_)
371 {
372 free(__parray_);
373 __parray_ = new_pointers.release();
374 __parray_cap_ = rhs.__parray_size_;
375 }
376 for (__parray_size_ = 0; __parray_size_ < rhs.__parray_size_; ++__parray_size_)
377 __parray_[__parray_size_] = rhs.__parray_[__parray_size_];
378 }
379
380 void
move(ios_base & rhs)381 ios_base::move(ios_base& rhs)
382 {
383 // *this is uninitialized
384 __fmtflags_ = rhs.__fmtflags_;
385 __precision_ = rhs.__precision_;
386 __width_ = rhs.__width_;
387 __rdstate_ = rhs.__rdstate_;
388 __exceptions_ = rhs.__exceptions_;
389 __rdbuf_ = 0;
390 locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
391 ::new(&__loc_) locale(rhs_loc);
392 __fn_ = rhs.__fn_;
393 rhs.__fn_ = 0;
394 __index_ = rhs.__index_;
395 rhs.__index_ = 0;
396 __event_size_ = rhs.__event_size_;
397 rhs.__event_size_ = 0;
398 __event_cap_ = rhs.__event_cap_;
399 rhs.__event_cap_ = 0;
400 __iarray_ = rhs.__iarray_;
401 rhs.__iarray_ = 0;
402 __iarray_size_ = rhs.__iarray_size_;
403 rhs.__iarray_size_ = 0;
404 __iarray_cap_ = rhs.__iarray_cap_;
405 rhs.__iarray_cap_ = 0;
406 __parray_ = rhs.__parray_;
407 rhs.__parray_ = 0;
408 __parray_size_ = rhs.__parray_size_;
409 rhs.__parray_size_ = 0;
410 __parray_cap_ = rhs.__parray_cap_;
411 rhs.__parray_cap_ = 0;
412 }
413
414 void
swap(ios_base & rhs)415 ios_base::swap(ios_base& rhs) _NOEXCEPT
416 {
417 _VSTD::swap(__fmtflags_, rhs.__fmtflags_);
418 _VSTD::swap(__precision_, rhs.__precision_);
419 _VSTD::swap(__width_, rhs.__width_);
420 _VSTD::swap(__rdstate_, rhs.__rdstate_);
421 _VSTD::swap(__exceptions_, rhs.__exceptions_);
422 locale& lhs_loc = *reinterpret_cast<locale*>(&__loc_);
423 locale& rhs_loc = *reinterpret_cast<locale*>(&rhs.__loc_);
424 _VSTD::swap(lhs_loc, rhs_loc);
425 _VSTD::swap(__fn_, rhs.__fn_);
426 _VSTD::swap(__index_, rhs.__index_);
427 _VSTD::swap(__event_size_, rhs.__event_size_);
428 _VSTD::swap(__event_cap_, rhs.__event_cap_);
429 _VSTD::swap(__iarray_, rhs.__iarray_);
430 _VSTD::swap(__iarray_size_, rhs.__iarray_size_);
431 _VSTD::swap(__iarray_cap_, rhs.__iarray_cap_);
432 _VSTD::swap(__parray_, rhs.__parray_);
433 _VSTD::swap(__parray_size_, rhs.__parray_size_);
434 _VSTD::swap(__parray_cap_, rhs.__parray_cap_);
435 }
436
437 void
__set_badbit_and_consider_rethrow()438 ios_base::__set_badbit_and_consider_rethrow()
439 {
440 __rdstate_ |= badbit;
441 #ifndef _LIBCPP_NO_EXCEPTIONS
442 if (__exceptions_ & badbit)
443 throw;
444 #endif // _LIBCPP_NO_EXCEPTIONS
445 }
446
447 void
__set_failbit_and_consider_rethrow()448 ios_base::__set_failbit_and_consider_rethrow()
449 {
450 __rdstate_ |= failbit;
451 #ifndef _LIBCPP_NO_EXCEPTIONS
452 if (__exceptions_ & failbit)
453 throw;
454 #endif // _LIBCPP_NO_EXCEPTIONS
455 }
456
457 bool
sync_with_stdio(bool sync)458 ios_base::sync_with_stdio(bool sync)
459 {
460 static bool previous_state = true;
461 bool r = previous_state;
462 previous_state = sync;
463 return r;
464 }
465
466 _LIBCPP_END_NAMESPACE_STD
467