1 // Standard stream manipulators -*- C++ -*- 2 3 // Copyright (C) 1997-2014 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file include/iomanip 26 * This is a Standard C++ Library header. 27 */ 28 29 // 30 // ISO C++ 14882: 27.6.3 Standard manipulators 31 // 32 33 #ifndef _GLIBCXX_IOMANIP 34 #define _GLIBCXX_IOMANIP 1 35 36 #pragma GCC system_header 37 38 #include <bits/c++config.h> 39 #include <iosfwd> 40 #include <bits/ios_base.h> 41 42 #if __cplusplus >= 201103L 43 #include <locale> 44 #endif 45 46 namespace std _GLIBCXX_VISIBILITY(default) 47 { 48 _GLIBCXX_BEGIN_NAMESPACE_VERSION 49 50 // [27.6.3] standard manipulators 51 // Also see DR 183. 52 53 struct _Resetiosflags { ios_base::fmtflags _M_mask; }; 54 55 /** 56 * @brief Manipulator for @c setf. 57 * @param __mask A format flags mask. 58 * 59 * Sent to a stream object, this manipulator resets the specified flags, 60 * via @e stream.setf(0,__mask). 61 */ 62 inline _Resetiosflags 63 resetiosflags(ios_base::fmtflags __mask) 64 { return { __mask }; } 65 66 template<typename _CharT, typename _Traits> 67 inline basic_istream<_CharT, _Traits>& 68 operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f) 69 { 70 __is.setf(ios_base::fmtflags(0), __f._M_mask); 71 return __is; 72 } 73 74 template<typename _CharT, typename _Traits> 75 inline basic_ostream<_CharT, _Traits>& 76 operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f) 77 { 78 __os.setf(ios_base::fmtflags(0), __f._M_mask); 79 return __os; 80 } 81 82 83 struct _Setiosflags { ios_base::fmtflags _M_mask; }; 84 85 /** 86 * @brief Manipulator for @c setf. 87 * @param __mask A format flags mask. 88 * 89 * Sent to a stream object, this manipulator sets the format flags 90 * to @a __mask. 91 */ 92 inline _Setiosflags 93 setiosflags(ios_base::fmtflags __mask) 94 { return { __mask }; } 95 96 template<typename _CharT, typename _Traits> 97 inline basic_istream<_CharT, _Traits>& 98 operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f) 99 { 100 __is.setf(__f._M_mask); 101 return __is; 102 } 103 104 template<typename _CharT, typename _Traits> 105 inline basic_ostream<_CharT, _Traits>& 106 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f) 107 { 108 __os.setf(__f._M_mask); 109 return __os; 110 } 111 112 113 struct _Setbase { int _M_base; }; 114 115 /** 116 * @brief Manipulator for @c setf. 117 * @param __base A numeric base. 118 * 119 * Sent to a stream object, this manipulator changes the 120 * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base 121 * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value. 122 */ 123 inline _Setbase 124 setbase(int __base) 125 { return { __base }; } 126 127 template<typename _CharT, typename _Traits> 128 inline basic_istream<_CharT, _Traits>& 129 operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f) 130 { 131 __is.setf(__f._M_base == 8 ? ios_base::oct : 132 __f._M_base == 10 ? ios_base::dec : 133 __f._M_base == 16 ? ios_base::hex : 134 ios_base::fmtflags(0), ios_base::basefield); 135 return __is; 136 } 137 138 template<typename _CharT, typename _Traits> 139 inline basic_ostream<_CharT, _Traits>& 140 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f) 141 { 142 __os.setf(__f._M_base == 8 ? ios_base::oct : 143 __f._M_base == 10 ? ios_base::dec : 144 __f._M_base == 16 ? ios_base::hex : 145 ios_base::fmtflags(0), ios_base::basefield); 146 return __os; 147 } 148 149 150 template<typename _CharT> 151 struct _Setfill { _CharT _M_c; }; 152 153 /** 154 * @brief Manipulator for @c fill. 155 * @param __c The new fill character. 156 * 157 * Sent to a stream object, this manipulator calls @c fill(__c) for that 158 * object. 159 */ 160 template<typename _CharT> 161 inline _Setfill<_CharT> 162 setfill(_CharT __c) 163 { return { __c }; } 164 165 template<typename _CharT, typename _Traits> 166 inline basic_istream<_CharT, _Traits>& 167 operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f) 168 { 169 __is.fill(__f._M_c); 170 return __is; 171 } 172 173 template<typename _CharT, typename _Traits> 174 inline basic_ostream<_CharT, _Traits>& 175 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f) 176 { 177 __os.fill(__f._M_c); 178 return __os; 179 } 180 181 182 struct _Setprecision { int _M_n; }; 183 184 /** 185 * @brief Manipulator for @c precision. 186 * @param __n The new precision. 187 * 188 * Sent to a stream object, this manipulator calls @c precision(__n) for 189 * that object. 190 */ 191 inline _Setprecision 192 setprecision(int __n) 193 { return { __n }; } 194 195 template<typename _CharT, typename _Traits> 196 inline basic_istream<_CharT, _Traits>& 197 operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f) 198 { 199 __is.precision(__f._M_n); 200 return __is; 201 } 202 203 template<typename _CharT, typename _Traits> 204 inline basic_ostream<_CharT, _Traits>& 205 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f) 206 { 207 __os.precision(__f._M_n); 208 return __os; 209 } 210 211 212 struct _Setw { int _M_n; }; 213 214 /** 215 * @brief Manipulator for @c width. 216 * @param __n The new width. 217 * 218 * Sent to a stream object, this manipulator calls @c width(__n) for 219 * that object. 220 */ 221 inline _Setw 222 setw(int __n) 223 { return { __n }; } 224 225 template<typename _CharT, typename _Traits> 226 inline basic_istream<_CharT, _Traits>& 227 operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f) 228 { 229 __is.width(__f._M_n); 230 return __is; 231 } 232 233 template<typename _CharT, typename _Traits> 234 inline basic_ostream<_CharT, _Traits>& 235 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f) 236 { 237 __os.width(__f._M_n); 238 return __os; 239 } 240 241 #if __cplusplus >= 201103L 242 243 template<typename _MoneyT> 244 struct _Get_money { _MoneyT& _M_mon; bool _M_intl; }; 245 246 /** 247 * @brief Extended manipulator for extracting money. 248 * @param __mon Either long double or a specialization of @c basic_string. 249 * @param __intl A bool indicating whether international format 250 * is to be used. 251 * 252 * Sent to a stream object, this manipulator extracts @a __mon. 253 */ 254 template<typename _MoneyT> 255 inline _Get_money<_MoneyT> 256 get_money(_MoneyT& __mon, bool __intl = false) 257 { return { __mon, __intl }; } 258 259 template<typename _CharT, typename _Traits, typename _MoneyT> 260 basic_istream<_CharT, _Traits>& 261 operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f) 262 { 263 typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false); 264 if (__cerb) 265 { 266 ios_base::iostate __err = ios_base::goodbit; 267 __try 268 { 269 typedef istreambuf_iterator<_CharT, _Traits> _Iter; 270 typedef money_get<_CharT, _Iter> _MoneyGet; 271 272 const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc()); 273 __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl, 274 __is, __err, __f._M_mon); 275 } 276 __catch(__cxxabiv1::__forced_unwind&) 277 { 278 __is._M_setstate(ios_base::badbit); 279 __throw_exception_again; 280 } 281 __catch(...) 282 { __is._M_setstate(ios_base::badbit); } 283 if (__err) 284 __is.setstate(__err); 285 } 286 return __is; 287 } 288 289 290 template<typename _MoneyT> 291 struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; }; 292 293 /** 294 * @brief Extended manipulator for inserting money. 295 * @param __mon Either long double or a specialization of @c basic_string. 296 * @param __intl A bool indicating whether international format 297 * is to be used. 298 * 299 * Sent to a stream object, this manipulator inserts @a __mon. 300 */ 301 template<typename _MoneyT> 302 inline _Put_money<_MoneyT> 303 put_money(const _MoneyT& __mon, bool __intl = false) 304 { return { __mon, __intl }; } 305 306 template<typename _CharT, typename _Traits, typename _MoneyT> 307 basic_ostream<_CharT, _Traits>& 308 operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f) 309 { 310 typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os); 311 if (__cerb) 312 { 313 ios_base::iostate __err = ios_base::goodbit; 314 __try 315 { 316 typedef ostreambuf_iterator<_CharT, _Traits> _Iter; 317 typedef money_put<_CharT, _Iter> _MoneyPut; 318 319 const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc()); 320 if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os, 321 __os.fill(), __f._M_mon).failed()) 322 __err |= ios_base::badbit; 323 } 324 __catch(__cxxabiv1::__forced_unwind&) 325 { 326 __os._M_setstate(ios_base::badbit); 327 __throw_exception_again; 328 } 329 __catch(...) 330 { __os._M_setstate(ios_base::badbit); } 331 if (__err) 332 __os.setstate(__err); 333 } 334 return __os; 335 } 336 337 #if __cplusplus > 201103L 338 339 _GLIBCXX_END_NAMESPACE_VERSION 340 namespace __detail { 341 _GLIBCXX_BEGIN_NAMESPACE_VERSION 342 343 /** 344 * @brief Struct for delimited strings. 345 * The left and right delimiters can be different. 346 */ 347 template<typename _String, typename _CharT> 348 struct _Quoted_string 349 { 350 static_assert(is_reference<_String>::value 351 || is_pointer<_String>::value, 352 "String type must be pointer or reference"); 353 354 _Quoted_string(_String __str, _CharT __del, _CharT __esc) 355 : _M_string(__str), _M_delim{__del}, _M_escape{__esc} 356 { } 357 358 _Quoted_string& 359 operator=(_Quoted_string&) = delete; 360 361 _String _M_string; 362 _CharT _M_delim; 363 _CharT _M_escape; 364 }; 365 366 /** 367 * @brief Inserter for delimited strings. 368 * The left and right delimiters can be different. 369 */ 370 template<typename _CharT, typename _Traits> 371 auto& 372 operator<<(std::basic_ostream<_CharT, _Traits>& __os, 373 const _Quoted_string<const _CharT*, _CharT>& __str) 374 { 375 __os << __str._M_delim; 376 for (const _CharT* __c = __str._M_string; *__c; ++__c) 377 { 378 if (*__c == __str._M_delim || *__c == __str._M_escape) 379 __os << __str._M_escape; 380 __os << *__c; 381 } 382 __os << __str._M_delim; 383 384 return __os; 385 } 386 387 /** 388 * @brief Inserter for delimited strings. 389 * The left and right delimiters can be different. 390 */ 391 template<typename _CharT, typename _Traits, typename _String> 392 auto& 393 operator<<(std::basic_ostream<_CharT, _Traits>& __os, 394 const _Quoted_string<_String, _CharT>& __str) 395 { 396 __os << __str._M_delim; 397 for (auto& __c : __str._M_string) 398 { 399 if (__c == __str._M_delim || __c == __str._M_escape) 400 __os << __str._M_escape; 401 __os << __c; 402 } 403 __os << __str._M_delim; 404 405 return __os; 406 } 407 408 /** 409 * @brief Extractor for delimited strings. 410 * The left and right delimiters can be different. 411 */ 412 template<typename _CharT, typename _Traits, typename _Alloc> 413 auto& 414 operator>>(std::basic_istream<_CharT, _Traits>& __is, 415 const _Quoted_string<basic_string<_CharT, _Traits, _Alloc>&, 416 _CharT>& __str) 417 { 418 _CharT __c; 419 __is >> __c; 420 if (!__is.good()) 421 return __is; 422 if (__c != __str._M_delim) 423 { 424 __is.unget(); 425 __is >> __str._M_string; 426 return __is; 427 } 428 __str._M_string.clear(); 429 std::ios_base::fmtflags __flags 430 = __is.flags(__is.flags() & ~std::ios_base::skipws); 431 do 432 { 433 __is >> __c; 434 if (!__is.good()) 435 break; 436 if (__c == __str._M_escape) 437 { 438 __is >> __c; 439 if (!__is.good()) 440 break; 441 } 442 else if (__c == __str._M_delim) 443 break; 444 __str._M_string += __c; 445 } 446 while (true); 447 __is.setf(__flags); 448 449 return __is; 450 } 451 _GLIBCXX_END_NAMESPACE_VERSION 452 } // namespace __detail 453 _GLIBCXX_BEGIN_NAMESPACE_VERSION 454 455 /** 456 * @brief Manipulator for quoted strings. 457 * @param __str String to quote. 458 * @param __delim Character to quote string with. 459 * @param __escape Escape character to escape itself or quote character. 460 */ 461 template<typename _CharT> 462 inline auto 463 quoted(const _CharT* __string, 464 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 465 { 466 return __detail::_Quoted_string<const _CharT*, _CharT>(__string, __delim, 467 __escape); 468 } 469 470 template<typename _CharT, typename _Traits, typename _Alloc> 471 inline auto 472 quoted(const basic_string<_CharT, _Traits, _Alloc>& __string, 473 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 474 { 475 return __detail::_Quoted_string< 476 const basic_string<_CharT, _Traits, _Alloc>&, _CharT>( 477 __string, __delim, __escape); 478 } 479 480 template<typename _CharT, typename _Traits, typename _Alloc> 481 inline auto 482 quoted(basic_string<_CharT, _Traits, _Alloc>& __string, 483 _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\')) 484 { 485 return __detail::_Quoted_string< 486 basic_string<_CharT, _Traits, _Alloc>&, _CharT>( 487 __string, __delim, __escape); 488 } 489 490 #endif // __cplusplus > 201103L 491 492 #endif // __cplusplus >= 201103L 493 494 // Inhibit implicit instantiations for required instantiations, 495 // which are defined via explicit instantiations elsewhere. 496 // NB: This syntax is a GNU extension. 497 #if _GLIBCXX_EXTERN_TEMPLATE 498 extern template ostream& operator<<(ostream&, _Setfill<char>); 499 extern template ostream& operator<<(ostream&, _Setiosflags); 500 extern template ostream& operator<<(ostream&, _Resetiosflags); 501 extern template ostream& operator<<(ostream&, _Setbase); 502 extern template ostream& operator<<(ostream&, _Setprecision); 503 extern template ostream& operator<<(ostream&, _Setw); 504 extern template istream& operator>>(istream&, _Setfill<char>); 505 extern template istream& operator>>(istream&, _Setiosflags); 506 extern template istream& operator>>(istream&, _Resetiosflags); 507 extern template istream& operator>>(istream&, _Setbase); 508 extern template istream& operator>>(istream&, _Setprecision); 509 extern template istream& operator>>(istream&, _Setw); 510 511 #ifdef _GLIBCXX_USE_WCHAR_T 512 extern template wostream& operator<<(wostream&, _Setfill<wchar_t>); 513 extern template wostream& operator<<(wostream&, _Setiosflags); 514 extern template wostream& operator<<(wostream&, _Resetiosflags); 515 extern template wostream& operator<<(wostream&, _Setbase); 516 extern template wostream& operator<<(wostream&, _Setprecision); 517 extern template wostream& operator<<(wostream&, _Setw); 518 extern template wistream& operator>>(wistream&, _Setfill<wchar_t>); 519 extern template wistream& operator>>(wistream&, _Setiosflags); 520 extern template wistream& operator>>(wistream&, _Resetiosflags); 521 extern template wistream& operator>>(wistream&, _Setbase); 522 extern template wistream& operator>>(wistream&, _Setprecision); 523 extern template wistream& operator>>(wistream&, _Setw); 524 #endif 525 #endif 526 527 _GLIBCXX_END_NAMESPACE_VERSION 528 } // namespace 529 530 #endif /* _GLIBCXX_IOMANIP */ 531
