Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 1 | //===-------------------------- ios.cpp -----------------------------------===// |
| 2 | // |
Howard Hinnant | f5256e1 | 2010-05-11 21:36:01 +0000 | [diff] [blame] | 3 | // The LLVM Compiler Infrastructure |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 4 | // |
Howard Hinnant | b64f8b0 | 2010-11-16 22:09:02 +0000 | [diff] [blame^] | 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #include "ios" |
| 11 | #include "streambuf" |
| 12 | #include "istream" |
| 13 | #include "string" |
| 14 | #include "__locale" |
| 15 | #include "algorithm" |
| 16 | #include "memory" |
| 17 | #include "new" |
| 18 | #include "limits" |
| 19 | #include <stdlib.h> |
| 20 | |
| 21 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 22 | |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 23 | template class basic_ios<char>; |
| 24 | template class basic_ios<wchar_t>; |
| 25 | |
| 26 | template class basic_streambuf<char>; |
| 27 | template class basic_streambuf<wchar_t>; |
| 28 | |
| 29 | template class basic_istream<char>; |
| 30 | template class basic_istream<wchar_t>; |
| 31 | |
| 32 | template class basic_ostream<char>; |
| 33 | template class basic_ostream<wchar_t>; |
| 34 | |
| 35 | template class basic_iostream<char>; |
| 36 | |
| 37 | class _LIBCPP_HIDDEN __iostream_category |
| 38 | : public __do_message |
| 39 | { |
| 40 | public: |
| 41 | virtual const char* name() const; |
| 42 | virtual string message(int ev) const; |
| 43 | }; |
| 44 | |
| 45 | const char* |
| 46 | __iostream_category::name() const |
| 47 | { |
| 48 | return "iostream"; |
| 49 | } |
| 50 | |
| 51 | string |
| 52 | __iostream_category::message(int ev) const |
| 53 | { |
Howard Hinnant | adff489 | 2010-05-24 17:49:41 +0000 | [diff] [blame] | 54 | if (ev != static_cast<int>(io_errc::stream) |
| 55 | #ifdef ELAST |
| 56 | && ev <= ELAST |
| 57 | #endif |
| 58 | ) |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 59 | return __do_message::message(ev); |
| 60 | return string("unspecified iostream_category error"); |
| 61 | } |
| 62 | |
| 63 | const error_category& |
| 64 | iostream_category() |
| 65 | { |
| 66 | static __iostream_category s; |
| 67 | return s; |
| 68 | } |
| 69 | |
| 70 | // ios_base::failure |
| 71 | |
| 72 | ios_base::failure::failure(const string& msg, const error_code& ec) |
| 73 | : system_error(ec, msg) |
| 74 | { |
| 75 | } |
| 76 | |
| 77 | ios_base::failure::failure(const char* msg, const error_code& ec) |
| 78 | : system_error(ec, msg) |
| 79 | { |
| 80 | } |
| 81 | |
| 82 | ios_base::failure::~failure() throw() |
| 83 | { |
| 84 | } |
| 85 | |
| 86 | // ios_base locale |
| 87 | |
| 88 | const ios_base::fmtflags ios_base::boolalpha; |
| 89 | const ios_base::fmtflags ios_base::dec; |
| 90 | const ios_base::fmtflags ios_base::fixed; |
| 91 | const ios_base::fmtflags ios_base::hex; |
| 92 | const ios_base::fmtflags ios_base::internal; |
| 93 | const ios_base::fmtflags ios_base::left; |
| 94 | const ios_base::fmtflags ios_base::oct; |
| 95 | const ios_base::fmtflags ios_base::right; |
| 96 | const ios_base::fmtflags ios_base::scientific; |
| 97 | const ios_base::fmtflags ios_base::showbase; |
| 98 | const ios_base::fmtflags ios_base::showpoint; |
| 99 | const ios_base::fmtflags ios_base::showpos; |
| 100 | const ios_base::fmtflags ios_base::skipws; |
| 101 | const ios_base::fmtflags ios_base::unitbuf; |
| 102 | const ios_base::fmtflags ios_base::uppercase; |
| 103 | const ios_base::fmtflags ios_base::adjustfield; |
| 104 | const ios_base::fmtflags ios_base::basefield; |
| 105 | const ios_base::fmtflags ios_base::floatfield; |
| 106 | |
| 107 | const ios_base::iostate ios_base::badbit; |
| 108 | const ios_base::iostate ios_base::eofbit; |
| 109 | const ios_base::iostate ios_base::failbit; |
| 110 | const ios_base::iostate ios_base::goodbit; |
| 111 | |
| 112 | const ios_base::openmode ios_base::app; |
| 113 | const ios_base::openmode ios_base::ate; |
| 114 | const ios_base::openmode ios_base::binary; |
| 115 | const ios_base::openmode ios_base::in; |
| 116 | const ios_base::openmode ios_base::out; |
| 117 | const ios_base::openmode ios_base::trunc; |
| 118 | |
| 119 | void |
| 120 | ios_base::__call_callbacks(event ev) |
| 121 | { |
| 122 | for (size_t i = __event_size_; i;) |
| 123 | { |
| 124 | --i; |
| 125 | __fn_[i](ev, *this, __index_[i]); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | // locale |
| 130 | |
| 131 | locale |
| 132 | ios_base::imbue(const locale& newloc) |
| 133 | { |
| 134 | static_assert(sizeof(locale) == sizeof(__loc_), ""); |
| 135 | locale& loc_storage = *(locale*)&__loc_; |
| 136 | locale oldloc = loc_storage; |
| 137 | loc_storage = newloc; |
| 138 | __call_callbacks(imbue_event); |
| 139 | return oldloc; |
| 140 | } |
| 141 | |
| 142 | locale |
| 143 | ios_base::getloc() const |
| 144 | { |
| 145 | const locale& loc_storage = *(locale*)&__loc_; |
| 146 | return loc_storage; |
| 147 | } |
| 148 | |
| 149 | // xalloc |
| 150 | |
| 151 | int ios_base::__xindex_ = 0; |
| 152 | |
| 153 | int |
| 154 | ios_base::xalloc() |
| 155 | { |
| 156 | return __xindex_++; |
| 157 | } |
| 158 | |
| 159 | long& |
| 160 | ios_base::iword(int index) |
| 161 | { |
| 162 | size_t req_size = static_cast<size_t>(index)+1; |
| 163 | if (req_size > __iarray_cap_) |
| 164 | { |
| 165 | size_t newcap; |
| 166 | const size_t mx = std::numeric_limits<size_t>::max(); |
| 167 | if (req_size < mx/2) |
| 168 | newcap = max(2 * __iarray_cap_, req_size); |
| 169 | else |
| 170 | newcap = mx; |
| 171 | long* iarray = (long*)realloc(__iarray_, newcap * sizeof(long)); |
| 172 | if (iarray == 0) |
| 173 | { |
| 174 | setstate(badbit); |
| 175 | static long error; |
| 176 | error = 0; |
| 177 | return error; |
| 178 | } |
| 179 | __iarray_ = iarray; |
| 180 | for (long* p = __iarray_ + __iarray_size_; __iarray_cap_ < newcap; ++__iarray_cap_, ++p) |
| 181 | *p = 0; |
| 182 | } |
| 183 | __iarray_size_ = max<size_t>(__iarray_size_, req_size); |
| 184 | return __iarray_[index]; |
| 185 | } |
| 186 | |
| 187 | void*& |
| 188 | ios_base::pword(int index) |
| 189 | { |
| 190 | size_t req_size = static_cast<size_t>(index)+1; |
| 191 | if (req_size > __parray_cap_) |
| 192 | { |
| 193 | size_t newcap; |
| 194 | const size_t mx = std::numeric_limits<size_t>::max(); |
| 195 | if (req_size < mx/2) |
| 196 | newcap = max(2 * __parray_cap_, req_size); |
| 197 | else |
| 198 | newcap = mx; |
| 199 | void** parray = (void**)realloc(__parray_, newcap * sizeof(void*)); |
| 200 | if (parray == 0) |
| 201 | { |
| 202 | setstate(badbit); |
| 203 | static void* error; |
| 204 | error = 0; |
| 205 | return error; |
| 206 | } |
| 207 | __parray_ = parray; |
| 208 | for (void** p = __parray_ + __parray_size_; __parray_cap_ < newcap; ++__parray_cap_, ++p) |
| 209 | *p = 0; |
| 210 | } |
| 211 | __parray_size_ = max<size_t>(__parray_size_, req_size); |
| 212 | return __parray_[index]; |
| 213 | } |
| 214 | |
| 215 | // register_callback |
| 216 | |
| 217 | void |
| 218 | ios_base::register_callback(event_callback fn, int index) |
| 219 | { |
| 220 | size_t req_size = __event_size_ + 1; |
| 221 | if (req_size > __event_cap_) |
| 222 | { |
| 223 | size_t newcap; |
| 224 | const size_t mx = std::numeric_limits<size_t>::max(); |
| 225 | if (req_size < mx/2) |
| 226 | newcap = max(2 * __event_cap_, req_size); |
| 227 | else |
| 228 | newcap = mx; |
| 229 | event_callback* fns = (event_callback*)realloc(__fn_, newcap * sizeof(event_callback)); |
| 230 | if (fns == 0) |
| 231 | setstate(badbit); |
| 232 | __fn_ = fns; |
| 233 | int* indxs = (int*)realloc(__index_, newcap * sizeof(int)); |
| 234 | if (indxs == 0) |
| 235 | setstate(badbit); |
| 236 | __index_ = indxs; |
| 237 | } |
| 238 | __fn_[__event_size_] = fn; |
| 239 | __index_[__event_size_] = index; |
| 240 | ++__event_size_; |
| 241 | } |
| 242 | |
| 243 | ios_base::~ios_base() |
| 244 | { |
| 245 | __call_callbacks(erase_event); |
| 246 | locale& loc_storage = *(locale*)&__loc_; |
| 247 | loc_storage.~locale(); |
| 248 | free(__fn_); |
| 249 | free(__index_); |
| 250 | free(__iarray_); |
| 251 | free(__parray_); |
| 252 | } |
| 253 | |
| 254 | // iostate |
| 255 | |
| 256 | void |
| 257 | ios_base::clear(iostate state) |
| 258 | { |
| 259 | if (__rdbuf_) |
| 260 | __rdstate_ = state; |
| 261 | else |
| 262 | __rdstate_ = state | badbit; |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 263 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 264 | if (((state | (__rdbuf_ ? goodbit : badbit)) & __exceptions_) != 0) |
| 265 | throw failure("ios_base::clear"); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 266 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | // init |
| 270 | |
| 271 | void |
| 272 | ios_base::init(void* sb) |
| 273 | { |
| 274 | __rdbuf_ = sb; |
| 275 | __rdstate_ = __rdbuf_ ? goodbit : badbit; |
| 276 | __exceptions_ = goodbit; |
| 277 | __fmtflags_ = skipws | dec; |
| 278 | __width_ = 0; |
| 279 | __precision_ = 6; |
| 280 | __fn_ = 0; |
| 281 | __index_ = 0; |
| 282 | __event_size_ = 0; |
| 283 | __event_cap_ = 0; |
| 284 | __iarray_ = 0; |
| 285 | __iarray_size_ = 0; |
| 286 | __iarray_cap_ = 0; |
| 287 | __parray_ = 0; |
| 288 | __parray_size_ = 0; |
| 289 | __parray_cap_ = 0; |
| 290 | ::new(&__loc_) locale; |
| 291 | } |
| 292 | |
| 293 | void |
| 294 | ios_base::copyfmt(const ios_base& rhs) |
| 295 | { |
| 296 | // If we can't acquire the needed resources, throw bad_alloc (can't set badbit) |
| 297 | // Don't alter *this until all needed resources are aquired |
| 298 | unique_ptr<event_callback, void (*)(void*)> new_callbacks(0, free); |
| 299 | unique_ptr<int, void (*)(void*)> new_ints(0, free); |
| 300 | unique_ptr<long, void (*)(void*)> new_longs(0, free); |
| 301 | unique_ptr<void*, void (*)(void*)> new_pointers(0, free); |
| 302 | if (__event_cap_ < rhs.__event_size_) |
| 303 | { |
| 304 | new_callbacks.reset((event_callback*)malloc(sizeof(event_callback) * rhs.__event_size_)); |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 305 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 306 | if (!new_callbacks) |
| 307 | throw bad_alloc(); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 308 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 309 | new_ints.reset((int*)malloc(sizeof(int) * rhs.__event_size_)); |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 310 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 311 | if (!new_ints) |
| 312 | throw bad_alloc(); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 313 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 314 | } |
| 315 | if (__iarray_cap_ < rhs.__iarray_size_) |
| 316 | { |
| 317 | new_longs.reset((long*)malloc(sizeof(long) * rhs.__iarray_size_)); |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 318 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 319 | if (!new_longs) |
| 320 | throw bad_alloc(); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 321 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 322 | } |
| 323 | if (__parray_cap_ < rhs.__parray_size_) |
| 324 | { |
| 325 | new_pointers.reset((void**)malloc(sizeof(void*) * rhs.__parray_size_)); |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 326 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 327 | if (!new_pointers) |
| 328 | throw bad_alloc(); |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 329 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 330 | } |
| 331 | // Got everything we need. Copy everything but __rdstate_, __rdbuf_ and __exceptions_ |
| 332 | __fmtflags_ = rhs.__fmtflags_; |
| 333 | __precision_ = rhs.__precision_; |
| 334 | __width_ = rhs.__width_; |
| 335 | locale& lhs_loc = *(locale*)&__loc_; |
| 336 | locale& rhs_loc = *(locale*)&rhs.__loc_; |
| 337 | lhs_loc = rhs_loc; |
| 338 | if (__event_cap_ < rhs.__event_size_) |
| 339 | { |
| 340 | free(__fn_); |
| 341 | __fn_ = new_callbacks.release(); |
| 342 | free(__index_); |
| 343 | __index_ = new_ints.release(); |
| 344 | __event_cap_ = rhs.__event_size_; |
| 345 | } |
| 346 | for (__event_size_ = 0; __event_size_ < rhs.__event_size_; ++__event_size_) |
| 347 | { |
| 348 | __fn_[__event_size_] = rhs.__fn_[__event_size_]; |
| 349 | __index_[__event_size_] = rhs.__index_[__event_size_]; |
| 350 | } |
| 351 | if (__iarray_cap_ < rhs.__iarray_size_) |
| 352 | { |
| 353 | free(__iarray_); |
| 354 | __iarray_ = new_longs.release(); |
| 355 | __iarray_cap_ = rhs.__iarray_size_; |
| 356 | } |
| 357 | for (__iarray_size_ = 0; __iarray_size_ < rhs.__iarray_size_; ++__iarray_size_) |
| 358 | __iarray_[__iarray_size_] = rhs.__iarray_[__iarray_size_]; |
| 359 | if (__parray_cap_ < rhs.__parray_size_) |
| 360 | { |
| 361 | free(__parray_); |
| 362 | __parray_ = new_pointers.release(); |
| 363 | __parray_cap_ = rhs.__parray_size_; |
| 364 | } |
| 365 | for (__parray_size_ = 0; __parray_size_ < rhs.__parray_size_; ++__parray_size_) |
| 366 | __parray_[__parray_size_] = rhs.__parray_[__parray_size_]; |
| 367 | } |
| 368 | |
| 369 | void |
| 370 | ios_base::move(ios_base& rhs) |
| 371 | { |
| 372 | // *this is uninitialized |
| 373 | __fmtflags_ = rhs.__fmtflags_; |
| 374 | __precision_ = rhs.__precision_; |
| 375 | __width_ = rhs.__width_; |
| 376 | __rdstate_ = rhs.__rdstate_; |
| 377 | __exceptions_ = rhs.__exceptions_; |
| 378 | __rdbuf_ = 0; |
| 379 | locale& rhs_loc = *(locale*)&rhs.__loc_; |
| 380 | ::new(&__loc_) locale(rhs_loc); |
| 381 | __fn_ = rhs.__fn_; |
| 382 | rhs.__fn_ = 0; |
| 383 | __index_ = rhs.__index_; |
| 384 | rhs.__index_ = 0; |
| 385 | __event_size_ = rhs.__event_size_; |
| 386 | rhs.__event_size_ = 0; |
| 387 | __event_cap_ = rhs.__event_cap_; |
| 388 | rhs.__event_cap_ = 0; |
| 389 | __iarray_ = rhs.__iarray_; |
| 390 | rhs.__iarray_ = 0; |
| 391 | __iarray_size_ = rhs.__iarray_size_; |
| 392 | rhs.__iarray_size_ = 0; |
| 393 | __iarray_cap_ = rhs.__iarray_cap_; |
| 394 | rhs.__iarray_cap_ = 0; |
| 395 | __parray_ = rhs.__parray_; |
| 396 | rhs.__parray_ = 0; |
| 397 | __parray_size_ = rhs.__parray_size_; |
| 398 | rhs.__parray_size_ = 0; |
| 399 | __parray_cap_ = rhs.__parray_cap_; |
| 400 | rhs.__parray_cap_ = 0; |
| 401 | } |
| 402 | |
| 403 | void |
| 404 | ios_base::swap(ios_base& rhs) |
| 405 | { |
| 406 | _STD::swap(__fmtflags_, rhs.__fmtflags_); |
| 407 | _STD::swap(__precision_, rhs.__precision_); |
| 408 | _STD::swap(__width_, rhs.__width_); |
| 409 | _STD::swap(__rdstate_, rhs.__rdstate_); |
| 410 | _STD::swap(__exceptions_, rhs.__exceptions_); |
| 411 | locale& lhs_loc = *(locale*)&__loc_; |
| 412 | locale& rhs_loc = *(locale*)&rhs.__loc_; |
| 413 | _STD::swap(lhs_loc, rhs_loc); |
| 414 | _STD::swap(__fn_, rhs.__fn_); |
| 415 | _STD::swap(__index_, rhs.__index_); |
| 416 | _STD::swap(__event_size_, rhs.__event_size_); |
| 417 | _STD::swap(__event_cap_, rhs.__event_cap_); |
| 418 | _STD::swap(__iarray_, rhs.__iarray_); |
| 419 | _STD::swap(__iarray_size_, rhs.__iarray_size_); |
| 420 | _STD::swap(__iarray_cap_, rhs.__iarray_cap_); |
| 421 | _STD::swap(__parray_, rhs.__parray_); |
| 422 | _STD::swap(__parray_size_, rhs.__parray_size_); |
| 423 | _STD::swap(__parray_cap_, rhs.__parray_cap_); |
| 424 | } |
| 425 | |
| 426 | void |
| 427 | ios_base::__set_badbit_and_consider_rethrow() |
| 428 | { |
| 429 | __rdstate_ |= badbit; |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 430 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 431 | if (__exceptions_ & badbit) |
| 432 | throw; |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 433 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | void |
| 437 | ios_base::__set_failbit_and_consider_rethrow() |
| 438 | { |
| 439 | __rdstate_ |= failbit; |
Howard Hinnant | d444470 | 2010-08-11 17:04:31 +0000 | [diff] [blame] | 440 | #ifndef _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 441 | if (__exceptions_ & failbit) |
| 442 | throw; |
Howard Hinnant | 16e6e1d | 2010-08-22 00:03:27 +0000 | [diff] [blame] | 443 | #endif // _LIBCPP_NO_EXCEPTIONS |
Howard Hinnant | bc8d3f9 | 2010-05-11 19:42:16 +0000 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | bool |
| 447 | ios_base::sync_with_stdio(bool sync) |
| 448 | { |
| 449 | static bool previous_state = true; |
| 450 | bool r = previous_state; |
| 451 | previous_state = sync; |
| 452 | return r; |
| 453 | } |
| 454 | |
| 455 | _LIBCPP_END_NAMESPACE_STD |