libstdc++
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00001 // Standard stream manipulators -*- C++ -*- 00002 00003 // Copyright (C) 1997-2013 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file include/iomanip 00026 * This is a Standard C++ Library header. 00027 */ 00028 00029 // 00030 // ISO C++ 14882: 27.6.3 Standard manipulators 00031 // 00032 00033 #ifndef _GLIBCXX_IOMANIP 00034 #define _GLIBCXX_IOMANIP 1 00035 00036 #pragma GCC system_header 00037 00038 #include <bits/c++config.h> 00039 #include <iosfwd> 00040 #include <bits/ios_base.h> 00041 00042 #if __cplusplus >= 201103L 00043 #include <locale> 00044 #endif 00045 00046 namespace std _GLIBCXX_VISIBILITY(default) 00047 { 00048 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00049 00050 // [27.6.3] standard manipulators 00051 // Also see DR 183. 00052 00053 struct _Resetiosflags { ios_base::fmtflags _M_mask; }; 00054 00055 /** 00056 * @brief Manipulator for @c setf. 00057 * @param __mask A format flags mask. 00058 * 00059 * Sent to a stream object, this manipulator resets the specified flags, 00060 * via @e stream.setf(0,__mask). 00061 */ 00062 inline _Resetiosflags 00063 resetiosflags(ios_base::fmtflags __mask) 00064 { return { __mask }; } 00065 00066 template<typename _CharT, typename _Traits> 00067 inline basic_istream<_CharT, _Traits>& 00068 operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f) 00069 { 00070 __is.setf(ios_base::fmtflags(0), __f._M_mask); 00071 return __is; 00072 } 00073 00074 template<typename _CharT, typename _Traits> 00075 inline basic_ostream<_CharT, _Traits>& 00076 operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f) 00077 { 00078 __os.setf(ios_base::fmtflags(0), __f._M_mask); 00079 return __os; 00080 } 00081 00082 00083 struct _Setiosflags { ios_base::fmtflags _M_mask; }; 00084 00085 /** 00086 * @brief Manipulator for @c setf. 00087 * @param __mask A format flags mask. 00088 * 00089 * Sent to a stream object, this manipulator sets the format flags 00090 * to @a __mask. 00091 */ 00092 inline _Setiosflags 00093 setiosflags(ios_base::fmtflags __mask) 00094 { return { __mask }; } 00095 00096 template<typename _CharT, typename _Traits> 00097 inline basic_istream<_CharT, _Traits>& 00098 operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f) 00099 { 00100 __is.setf(__f._M_mask); 00101 return __is; 00102 } 00103 00104 template<typename _CharT, typename _Traits> 00105 inline basic_ostream<_CharT, _Traits>& 00106 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f) 00107 { 00108 __os.setf(__f._M_mask); 00109 return __os; 00110 } 00111 00112 00113 struct _Setbase { int _M_base; }; 00114 00115 /** 00116 * @brief Manipulator for @c setf. 00117 * @param __base A numeric base. 00118 * 00119 * Sent to a stream object, this manipulator changes the 00120 * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base 00121 * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value. 00122 */ 00123 inline _Setbase 00124 setbase(int __base) 00125 { return { __base }; } 00126 00127 template<typename _CharT, typename _Traits> 00128 inline basic_istream<_CharT, _Traits>& 00129 operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f) 00130 { 00131 __is.setf(__f._M_base == 8 ? ios_base::oct : 00132 __f._M_base == 10 ? ios_base::dec : 00133 __f._M_base == 16 ? ios_base::hex : 00134 ios_base::fmtflags(0), ios_base::basefield); 00135 return __is; 00136 } 00137 00138 template<typename _CharT, typename _Traits> 00139 inline basic_ostream<_CharT, _Traits>& 00140 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f) 00141 { 00142 __os.setf(__f._M_base == 8 ? ios_base::oct : 00143 __f._M_base == 10 ? ios_base::dec : 00144 __f._M_base == 16 ? ios_base::hex : 00145 ios_base::fmtflags(0), ios_base::basefield); 00146 return __os; 00147 } 00148 00149 00150 template<typename _CharT> 00151 struct _Setfill { _CharT _M_c; }; 00152 00153 /** 00154 * @brief Manipulator for @c fill. 00155 * @param __c The new fill character. 00156 * 00157 * Sent to a stream object, this manipulator calls @c fill(__c) for that 00158 * object. 00159 */ 00160 template<typename _CharT> 00161 inline _Setfill<_CharT> 00162 setfill(_CharT __c) 00163 { return { __c }; } 00164 00165 template<typename _CharT, typename _Traits> 00166 inline basic_istream<_CharT, _Traits>& 00167 operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f) 00168 { 00169 __is.fill(__f._M_c); 00170 return __is; 00171 } 00172 00173 template<typename _CharT, typename _Traits> 00174 inline basic_ostream<_CharT, _Traits>& 00175 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f) 00176 { 00177 __os.fill(__f._M_c); 00178 return __os; 00179 } 00180 00181 00182 struct _Setprecision { int _M_n; }; 00183 00184 /** 00185 * @brief Manipulator for @c precision. 00186 * @param __n The new precision. 00187 * 00188 * Sent to a stream object, this manipulator calls @c precision(__n) for 00189 * that object. 00190 */ 00191 inline _Setprecision 00192 setprecision(int __n) 00193 { return { __n }; } 00194 00195 template<typename _CharT, typename _Traits> 00196 inline basic_istream<_CharT, _Traits>& 00197 operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f) 00198 { 00199 __is.precision(__f._M_n); 00200 return __is; 00201 } 00202 00203 template<typename _CharT, typename _Traits> 00204 inline basic_ostream<_CharT, _Traits>& 00205 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f) 00206 { 00207 __os.precision(__f._M_n); 00208 return __os; 00209 } 00210 00211 00212 struct _Setw { int _M_n; }; 00213 00214 /** 00215 * @brief Manipulator for @c width. 00216 * @param __n The new width. 00217 * 00218 * Sent to a stream object, this manipulator calls @c width(__n) for 00219 * that object. 00220 */ 00221 inline _Setw 00222 setw(int __n) 00223 { return { __n }; } 00224 00225 template<typename _CharT, typename _Traits> 00226 inline basic_istream<_CharT, _Traits>& 00227 operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f) 00228 { 00229 __is.width(__f._M_n); 00230 return __is; 00231 } 00232 00233 template<typename _CharT, typename _Traits> 00234 inline basic_ostream<_CharT, _Traits>& 00235 operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f) 00236 { 00237 __os.width(__f._M_n); 00238 return __os; 00239 } 00240 00241 #if __cplusplus >= 201103L 00242 00243 template<typename _MoneyT> 00244 struct _Get_money { _MoneyT& _M_mon; bool _M_intl; }; 00245 00246 /** 00247 * @brief Extended manipulator for extracting money. 00248 * @param __mon Either long double or a specialization of @c basic_string. 00249 * @param __intl A bool indicating whether international format 00250 * is to be used. 00251 * 00252 * Sent to a stream object, this manipulator extracts @a __mon. 00253 */ 00254 template<typename _MoneyT> 00255 inline _Get_money<_MoneyT> 00256 get_money(_MoneyT& __mon, bool __intl = false) 00257 { return { __mon, __intl }; } 00258 00259 template<typename _CharT, typename _Traits, typename _MoneyT> 00260 basic_istream<_CharT, _Traits>& 00261 operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f) 00262 { 00263 typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false); 00264 if (__cerb) 00265 { 00266 ios_base::iostate __err = ios_base::goodbit; 00267 __try 00268 { 00269 typedef istreambuf_iterator<_CharT, _Traits> _Iter; 00270 typedef money_get<_CharT, _Iter> _MoneyGet; 00271 00272 const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc()); 00273 __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl, 00274 __is, __err, __f._M_mon); 00275 } 00276 __catch(__cxxabiv1::__forced_unwind&) 00277 { 00278 __is._M_setstate(ios_base::badbit); 00279 __throw_exception_again; 00280 } 00281 __catch(...) 00282 { __is._M_setstate(ios_base::badbit); } 00283 if (__err) 00284 __is.setstate(__err); 00285 } 00286 return __is; 00287 } 00288 00289 00290 template<typename _MoneyT> 00291 struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; }; 00292 00293 /** 00294 * @brief Extended manipulator for inserting money. 00295 * @param __mon Either long double or a specialization of @c basic_string. 00296 * @param __intl A bool indicating whether international format 00297 * is to be used. 00298 * 00299 * Sent to a stream object, this manipulator inserts @a __mon. 00300 */ 00301 template<typename _MoneyT> 00302 inline _Put_money<_MoneyT> 00303 put_money(const _MoneyT& __mon, bool __intl = false) 00304 { return { __mon, __intl }; } 00305 00306 template<typename _CharT, typename _Traits, typename _MoneyT> 00307 basic_ostream<_CharT, _Traits>& 00308 operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f) 00309 { 00310 typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os); 00311 if (__cerb) 00312 { 00313 ios_base::iostate __err = ios_base::goodbit; 00314 __try 00315 { 00316 typedef ostreambuf_iterator<_CharT, _Traits> _Iter; 00317 typedef money_put<_CharT, _Iter> _MoneyPut; 00318 00319 const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc()); 00320 if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os, 00321 __os.fill(), __f._M_mon).failed()) 00322 __err |= ios_base::badbit; 00323 } 00324 __catch(__cxxabiv1::__forced_unwind&) 00325 { 00326 __os._M_setstate(ios_base::badbit); 00327 __throw_exception_again; 00328 } 00329 __catch(...) 00330 { __os._M_setstate(ios_base::badbit); } 00331 if (__err) 00332 __os.setstate(__err); 00333 } 00334 return __os; 00335 } 00336 00337 #endif 00338 00339 // Inhibit implicit instantiations for required instantiations, 00340 // which are defined via explicit instantiations elsewhere. 00341 // NB: This syntax is a GNU extension. 00342 #if _GLIBCXX_EXTERN_TEMPLATE 00343 extern template ostream& operator<<(ostream&, _Setfill<char>); 00344 extern template ostream& operator<<(ostream&, _Setiosflags); 00345 extern template ostream& operator<<(ostream&, _Resetiosflags); 00346 extern template ostream& operator<<(ostream&, _Setbase); 00347 extern template ostream& operator<<(ostream&, _Setprecision); 00348 extern template ostream& operator<<(ostream&, _Setw); 00349 extern template istream& operator>>(istream&, _Setfill<char>); 00350 extern template istream& operator>>(istream&, _Setiosflags); 00351 extern template istream& operator>>(istream&, _Resetiosflags); 00352 extern template istream& operator>>(istream&, _Setbase); 00353 extern template istream& operator>>(istream&, _Setprecision); 00354 extern template istream& operator>>(istream&, _Setw); 00355 00356 #ifdef _GLIBCXX_USE_WCHAR_T 00357 extern template wostream& operator<<(wostream&, _Setfill<wchar_t>); 00358 extern template wostream& operator<<(wostream&, _Setiosflags); 00359 extern template wostream& operator<<(wostream&, _Resetiosflags); 00360 extern template wostream& operator<<(wostream&, _Setbase); 00361 extern template wostream& operator<<(wostream&, _Setprecision); 00362 extern template wostream& operator<<(wostream&, _Setw); 00363 extern template wistream& operator>>(wistream&, _Setfill<wchar_t>); 00364 extern template wistream& operator>>(wistream&, _Setiosflags); 00365 extern template wistream& operator>>(wistream&, _Resetiosflags); 00366 extern template wistream& operator>>(wistream&, _Setbase); 00367 extern template wistream& operator>>(wistream&, _Setprecision); 00368 extern template wistream& operator>>(wistream&, _Setw); 00369 #endif 00370 #endif 00371 00372 _GLIBCXX_END_NAMESPACE_VERSION 00373 } // namespace 00374 00375 #endif /* _GLIBCXX_IOMANIP */