1 // Standard stream manipulators -*- C++ -*- 2 3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 4 // 2006, 2007, 2008, 2009, 2010, 2011 5 // Free Software Foundation, Inc. 6 // 7 // This file is part of the GNU ISO C++ Library. This library is free 8 // software; you can redistribute it and/or modify it under the 9 // terms of the GNU General Public License as published by the 10 // Free Software Foundation; either version 3, or (at your option) 11 // any later version. 12 13 // This library is distributed in the hope that it will be useful, 14 // but WITHOUT ANY WARRANTY; without even the implied warranty of 15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 // GNU General Public License for more details. 17 18 // Under Section 7 of GPL version 3, you are granted additional 19 // permissions described in the GCC Runtime Library Exception, version 20 // 3.1, as published by the Free Software Foundation. 21 22 // You should have received a copy of the GNU General Public License and 23 // a copy of the GCC Runtime Library Exception along with this program; 24 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25 // <http://www.gnu.org/licenses/>. 26 27 /** @file include/iomanip 28 * This is a Standard C++ Library header. 29 */ 30 31 // 32 // ISO C++ 14882: 27.6.3 Standard manipulators 33 // 34 35 #ifndef _GLIBCXX_IOMANIP 36 #define _GLIBCXX_IOMANIP 1 37 38 #pragma GCC system_header 39 40 #include <bits/c++config.h> 41 #include <iosfwd> 42 #include <bits/ios_base.h> 43 44 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 45 #include <locale> 46 #endif 47 48 namespace std _GLIBCXX_VISIBILITY(default) 49 { 50 _GLIBCXX_BEGIN_NAMESPACE_VERSION 51 52 // [27.6.3] standard manipulators 53 // Also see DR 183. 54 55 struct _Resetiosflags { ios_base::fmtflags _M_mask; }; 56 57 /** 58 * @brief Manipulator for @c setf. 59 * @param __mask A format flags mask. 60 * 61 * Sent to a stream object, this manipulator resets the specified flags, 62 * via @e stream.setf(0,__mask). 63 */ 64 inline _Resetiosflags 65 resetiosflags(ios_base::fmtflags __mask) 66 { return { __mask }; } 67 68 template<typename _CharT, typename _Traits> 69 inline basic_istream<_CharT, _Traits>& 70 operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f) 71 { 72 __is.setf(ios_base::fmtflags(0), __f._M_mask); 73 return __is; 74 } 75 76 template<typename _CharT, typename _Traits> 77 inline basic_ostream<_CharT, _Traits>& 78 operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f) 79 { 80 __os.setf(ios_base::fmtflags(0), __f._M_mask); 81 return __os; 82 } 83 84 85 struct _Setiosflags { ios_base::fmtflags _M_mask; }; 86 87 /** 88 * @brief Manipulator for @c setf. 89 * @param __mask A format flags mask. 90 * 91 * Sent to a stream object, this manipulator sets the format flags 92 * to @a __mask. 93 */ 94 inline _Setiosflags 95 setiosflags(ios_base::fmtflags __mask) 96 { return { __mask }; } 97 98 template<typename _CharT, typename _Traits> 99 inline basic_istream<_CharT, _Traits>& 100 operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f) 101 { 102 __is.setf(__f._M_mask); 103 return __is; 104 } 105 106 template<typename _CharT, typename _Traits> 107 inline basic_ostream<_CharT, _Traits>& 108 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f) 109 { 110 __os.setf(__f._M_mask); 111 return __os; 112 } 113 114 115 struct _Setbase { int _M_base; }; 116 117 /** 118 * @brief Manipulator for @c setf. 119 * @param __base A numeric base. 120 * 121 * Sent to a stream object, this manipulator changes the 122 * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base 123 * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value. 124 */ 125 inline _Setbase 126 setbase(int __base) 127 { return { __base }; } 128 129 template<typename _CharT, typename _Traits> 130 inline basic_istream<_CharT, _Traits>& 131 operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f) 132 { 133 __is.setf(__f._M_base == 8 ? ios_base::oct : 134 __f._M_base == 10 ? ios_base::dec : 135 __f._M_base == 16 ? ios_base::hex : 136 ios_base::fmtflags(0), ios_base::basefield); 137 return __is; 138 } 139 140 template<typename _CharT, typename _Traits> 141 inline basic_ostream<_CharT, _Traits>& 142 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f) 143 { 144 __os.setf(__f._M_base == 8 ? ios_base::oct : 145 __f._M_base == 10 ? ios_base::dec : 146 __f._M_base == 16 ? ios_base::hex : 147 ios_base::fmtflags(0), ios_base::basefield); 148 return __os; 149 } 150 151 152 template<typename _CharT> 153 struct _Setfill { _CharT _M_c; }; 154 155 /** 156 * @brief Manipulator for @c fill. 157 * @param __c The new fill character. 158 * 159 * Sent to a stream object, this manipulator calls @c fill(__c) for that 160 * object. 161 */ 162 template<typename _CharT> 163 inline _Setfill<_CharT> 164 setfill(_CharT __c) 165 { return { __c }; } 166 167 template<typename _CharT, typename _Traits> 168 inline basic_istream<_CharT, _Traits>& 169 operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f) 170 { 171 __is.fill(__f._M_c); 172 return __is; 173 } 174 175 template<typename _CharT, typename _Traits> 176 inline basic_ostream<_CharT, _Traits>& 177 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f) 178 { 179 __os.fill(__f._M_c); 180 return __os; 181 } 182 183 184 struct _Setprecision { int _M_n; }; 185 186 /** 187 * @brief Manipulator for @c precision. 188 * @param __n The new precision. 189 * 190 * Sent to a stream object, this manipulator calls @c precision(__n) for 191 * that object. 192 */ 193 inline _Setprecision 194 setprecision(int __n) 195 { return { __n }; } 196 197 template<typename _CharT, typename _Traits> 198 inline basic_istream<_CharT, _Traits>& 199 operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f) 200 { 201 __is.precision(__f._M_n); 202 return __is; 203 } 204 205 template<typename _CharT, typename _Traits> 206 inline basic_ostream<_CharT, _Traits>& 207 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f) 208 { 209 __os.precision(__f._M_n); 210 return __os; 211 } 212 213 214 struct _Setw { int _M_n; }; 215 216 /** 217 * @brief Manipulator for @c width. 218 * @param __n The new width. 219 * 220 * Sent to a stream object, this manipulator calls @c width(__n) for 221 * that object. 222 */ 223 inline _Setw 224 setw(int __n) 225 { return { __n }; } 226 227 template<typename _CharT, typename _Traits> 228 inline basic_istream<_CharT, _Traits>& 229 operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f) 230 { 231 __is.width(__f._M_n); 232 return __is; 233 } 234 235 template<typename _CharT, typename _Traits> 236 inline basic_ostream<_CharT, _Traits>& 237 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f) 238 { 239 __os.width(__f._M_n); 240 return __os; 241 } 242 243 #ifdef __GXX_EXPERIMENTAL_CXX0X__ 244 245 template<typename _MoneyT> 246 struct _Get_money { _MoneyT& _M_mon; bool _M_intl; }; 247 248 /** 249 * @brief Extended manipulator for extracting money. 250 * @param __mon Either long double or a specialization of @c basic_string. 251 * @param __intl A bool indicating whether international format 252 * is to be used. 253 * 254 * Sent to a stream object, this manipulator extracts @a __mon. 255 */ 256 template<typename _MoneyT> 257 inline _Get_money<_MoneyT> 258 get_money(_MoneyT& __mon, bool __intl = false) 259 { return { __mon, __intl }; } 260 261 template<typename _CharT, typename _Traits, typename _MoneyT> 262 basic_istream<_CharT, _Traits>& 263 operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f) 264 { 265 typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false); 266 if (__cerb) 267 { 268 ios_base::iostate __err = ios_base::goodbit; 269 __try 270 { 271 typedef istreambuf_iterator<_CharT, _Traits> _Iter; 272 typedef money_get<_CharT, _Iter> _MoneyGet; 273 274 const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc()); 275 __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl, 276 __is, __err, __f._M_mon); 277 } 278 __catch(__cxxabiv1::__forced_unwind&) 279 { 280 __is._M_setstate(ios_base::badbit); 281 __throw_exception_again; 282 } 283 __catch(...) 284 { __is._M_setstate(ios_base::badbit); } 285 if (__err) 286 __is.setstate(__err); 287 } 288 return __is; 289 } 290 291 292 template<typename _MoneyT> 293 struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; }; 294 295 /** 296 * @brief Extended manipulator for inserting money. 297 * @param __mon Either long double or a specialization of @c basic_string. 298 * @param __intl A bool indicating whether international format 299 * is to be used. 300 * 301 * Sent to a stream object, this manipulator inserts @a __mon. 302 */ 303 template<typename _MoneyT> 304 inline _Put_money<_MoneyT> 305 put_money(const _MoneyT& __mon, bool __intl = false) 306 { return { __mon, __intl }; } 307 308 template<typename _CharT, typename _Traits, typename _MoneyT> 309 basic_ostream<_CharT, _Traits>& 310 operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f) 311 { 312 typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os); 313 if (__cerb) 314 { 315 ios_base::iostate __err = ios_base::goodbit; 316 __try 317 { 318 typedef ostreambuf_iterator<_CharT, _Traits> _Iter; 319 typedef money_put<_CharT, _Iter> _MoneyPut; 320 321 const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc()); 322 if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os, 323 __os.fill(), __f._M_mon).failed()) 324 __err |= ios_base::badbit; 325 } 326 __catch(__cxxabiv1::__forced_unwind&) 327 { 328 __os._M_setstate(ios_base::badbit); 329 __throw_exception_again; 330 } 331 __catch(...) 332 { __os._M_setstate(ios_base::badbit); } 333 if (__err) 334 __os.setstate(__err); 335 } 336 return __os; 337 } 338 339 #endif 340 341 // Inhibit implicit instantiations for required instantiations, 342 // which are defined via explicit instantiations elsewhere. 343 // NB: This syntax is a GNU extension. 344 #if _GLIBCXX_EXTERN_TEMPLATE 345 extern template ostream& operator<<(ostream&, _Setfill<char>); 346 extern template ostream& operator<<(ostream&, _Setiosflags); 347 extern template ostream& operator<<(ostream&, _Resetiosflags); 348 extern template ostream& operator<<(ostream&, _Setbase); 349 extern template ostream& operator<<(ostream&, _Setprecision); 350 extern template ostream& operator<<(ostream&, _Setw); 351 extern template istream& operator>>(istream&, _Setfill<char>); 352 extern template istream& operator>>(istream&, _Setiosflags); 353 extern template istream& operator>>(istream&, _Resetiosflags); 354 extern template istream& operator>>(istream&, _Setbase); 355 extern template istream& operator>>(istream&, _Setprecision); 356 extern template istream& operator>>(istream&, _Setw); 357 358 #ifdef _GLIBCXX_USE_WCHAR_T 359 extern template wostream& operator<<(wostream&, _Setfill<wchar_t>); 360 extern template wostream& operator<<(wostream&, _Setiosflags); 361 extern template wostream& operator<<(wostream&, _Resetiosflags); 362 extern template wostream& operator<<(wostream&, _Setbase); 363 extern template wostream& operator<<(wostream&, _Setprecision); 364 extern template wostream& operator<<(wostream&, _Setw); 365 extern template wistream& operator>>(wistream&, _Setfill<wchar_t>); 366 extern template wistream& operator>>(wistream&, _Setiosflags); 367 extern template wistream& operator>>(wistream&, _Resetiosflags); 368 extern template wistream& operator>>(wistream&, _Setbase); 369 extern template wistream& operator>>(wistream&, _Setprecision); 370 extern template wistream& operator>>(wistream&, _Setw); 371 #endif 372 #endif 373 374 _GLIBCXX_END_NAMESPACE_VERSION 375 } // namespace 376 377 #endif /* _GLIBCXX_IOMANIP */ 378
