# iomanip

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    00001 // Standard stream manipulators -*- C++ -*-
    00002
    00003 // Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003, 2005
    00004 // Free Software Foundation, Inc.
    00005 //
    00006 // This file is part of the GNU ISO C++ Library.  This library is free
    00007 // software; you can redistribute it and/or modify it under the
    00008 // terms of the GNU General Public License as published by the
    00009 // Free Software Foundation; either version 2, or (at your option)
    00010 // any later version.
    00011
    00012 // This library is distributed in the hope that it will be useful,
    00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015 // GNU General Public License for more details.
    00016
    00017 // You should have received a copy of the GNU General Public License along
    00018 // with this library; see the file COPYING.  If not, write to the Free
    00019 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
    00020 // USA.
    00021
    00022 // As a special exception, you may use this file as part of a free software
    00023 // library without restriction.  Specifically, if other files instantiate
    00024 // templates or use macros or inline functions from this file, or you compile
    00025 // this file and link it with other files to produce an executable, this
    00026 // file does not by itself cause the resulting executable to be covered by
    00027 // the GNU General Public License.  This exception does not however
    00028 // invalidate any other reasons why the executable file might be covered by
    00029 // the GNU General Public License.
    00030
    00031 /** @file iomanip
    00032  *  This is a Standard C++ Library header.
    00033  */
    00034
    00035 //
    00036 // ISO C++ 14882: 27.6.3  Standard manipulators
    00037 //
    00038
    00039 #ifndef _GLIBCXX_IOMANIP
    00040 #define _GLIBCXX_IOMANIP 1
    00041
    00042 #pragma GCC system_header
    00043
    00044 #include <bits/c++config.h>
    00045 #include <istream>
    00046 #include <functional>
    00047
    00048 _GLIBCXX_BEGIN_NAMESPACE(std)
    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   {
    00065     _Resetiosflags __x;
    00066     __x._M_mask = __mask;
    00067     return __x;
    00068   }
    00069
    00070   template<typename _CharT, typename _Traits>
    00071     inline basic_istream<_CharT,_Traits>&
    00072     operator>>(basic_istream<_CharT,_Traits>& __is, _Resetiosflags __f)
    00073     {
    00074       __is.setf(ios_base::fmtflags(0), __f._M_mask);
    00075       return __is;
    00076     }
    00077
    00078   template<typename _CharT, typename _Traits>
    00079     inline basic_ostream<_CharT,_Traits>&
    00080     operator<<(basic_ostream<_CharT,_Traits>& __os, _Resetiosflags __f)
    00081     {
    00082       __os.setf(ios_base::fmtflags(0), __f._M_mask);
    00083       return __os;
    00084     }
    00085
    00086
    00087   struct _Setiosflags { ios_base::fmtflags _M_mask; };
    00088
    00089   /**
    00090    *  @brief  Manipulator for @c setf.
    00091    *  @param  mask  A format flags mask.
    00092    *
    00093    *  Sent to a stream object, this manipulator sets the format flags
    00094    *  to @a mask.
    00095   */
    00096   inline _Setiosflags
    00097   setiosflags(ios_base::fmtflags __mask)
    00098   {
    00099     _Setiosflags __x;
    00100     __x._M_mask = __mask;
    00101     return __x;
    00102   }
    00103
    00104   template<typename _CharT, typename _Traits>
    00105     inline basic_istream<_CharT,_Traits>&
    00106     operator>>(basic_istream<_CharT,_Traits>& __is, _Setiosflags __f)
    00107     {
    00108       __is.setf(__f._M_mask);
    00109       return __is;
    00110     }
    00111
    00112   template<typename _CharT, typename _Traits>
    00113     inline basic_ostream<_CharT,_Traits>&
    00114     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setiosflags __f)
    00115     {
    00116       __os.setf(__f._M_mask);
    00117       return __os;
    00118     }
    00119
    00120
    00121   struct _Setbase { int _M_base; };
    00122
    00123   /**
    00124    *  @brief  Manipulator for @c setf.
    00125    *  @param  base  A numeric base.
    00126    *
    00127    *  Sent to a stream object, this manipulator changes the
    00128    *  @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
    00129    *  is 8, 10, or 16, accordingly, and to 0 if @a base is any other value.
    00130   */
    00131   inline _Setbase
    00132   setbase(int __base)
    00133   {
    00134     _Setbase __x;
    00135     __x._M_base = __base;
    00136     return __x;
    00137   }
    00138
    00139   template<typename _CharT, typename _Traits>
    00140     inline basic_istream<_CharT,_Traits>&
    00141     operator>>(basic_istream<_CharT,_Traits>& __is, _Setbase __f)
    00142     {
    00143       __is.setf(__f._M_base ==  8 ? ios_base::oct :
    00144           __f._M_base == 10 ? ios_base::dec :
    00145           __f._M_base == 16 ? ios_base::hex :
    00146           ios_base::fmtflags(0), ios_base::basefield);
    00147       return __is;
    00148     }
    00149
    00150   template<typename _CharT, typename _Traits>
    00151     inline basic_ostream<_CharT,_Traits>&
    00152     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setbase __f)
    00153     {
    00154       __os.setf(__f._M_base ==  8 ? ios_base::oct :
    00155         __f._M_base == 10 ? ios_base::dec :
    00156         __f._M_base == 16 ? ios_base::hex :
    00157         ios_base::fmtflags(0), ios_base::basefield);
    00158       return __os;
    00159     }
    00160
    00161
    00162   template<typename _CharT>
    00163     struct _Setfill { _CharT _M_c; };
    00164
    00165   /**
    00166    *  @brief  Manipulator for @c fill.
    00167    *  @param  c  The new fill character.
    00168    *
    00169    *  Sent to a stream object, this manipulator calls @c fill(c) for that
    00170    *  object.
    00171   */
    00172   template<typename _CharT>
    00173     inline _Setfill<_CharT>
    00174     setfill(_CharT __c)
    00175     {
    00176       _Setfill<_CharT> __x;
    00177       __x._M_c = __c;
    00178       return __x;
    00179     }
    00180
    00181   template<typename _CharT, typename _Traits>
    00182     inline basic_istream<_CharT,_Traits>&
    00183     operator>>(basic_istream<_CharT,_Traits>& __is, _Setfill<_CharT> __f)
    00184     {
    00185       __is.fill(__f._M_c);
    00186       return __is;
    00187     }
    00188
    00189   template<typename _CharT, typename _Traits>
    00190     inline basic_ostream<_CharT,_Traits>&
    00191     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setfill<_CharT> __f)
    00192     {
    00193       __os.fill(__f._M_c);
    00194       return __os;
    00195     }
    00196
    00197
    00198   struct _Setprecision { int _M_n; };
    00199
    00200   /**
    00201    *  @brief  Manipulator for @c precision.
    00202    *  @param  n  The new precision.
    00203    *
    00204    *  Sent to a stream object, this manipulator calls @c precision(n) for
    00205    *  that object.
    00206   */
    00207   inline _Setprecision
    00208   setprecision(int __n)
    00209   {
    00210     _Setprecision __x;
    00211     __x._M_n = __n;
    00212     return __x;
    00213   }
    00214
    00215   template<typename _CharT, typename _Traits>
    00216     inline basic_istream<_CharT,_Traits>&
    00217     operator>>(basic_istream<_CharT,_Traits>& __is, _Setprecision __f)
    00218     {
    00219       __is.precision(__f._M_n);
    00220       return __is;
    00221     }
    00222
    00223   template<typename _CharT, typename _Traits>
    00224     inline basic_ostream<_CharT,_Traits>&
    00225     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setprecision __f)
    00226     {
    00227       __os.precision(__f._M_n);
    00228       return __os;
    00229     }
    00230
    00231
    00232   struct _Setw { int _M_n; };
    00233
    00234   /**
    00235    *  @brief  Manipulator for @c width.
    00236    *  @param  n  The new width.
    00237    *
    00238    *  Sent to a stream object, this manipulator calls @c width(n) for
    00239    *  that object.
    00240   */
    00241   inline _Setw
    00242   setw(int __n)
    00243   {
    00244     _Setw __x;
    00245     __x._M_n = __n;
    00246     return __x;
    00247   }
    00248
    00249   template<typename _CharT, typename _Traits>
    00250     inline basic_istream<_CharT,_Traits>&
    00251     operator>>(basic_istream<_CharT,_Traits>& __is, _Setw __f)
    00252     {
    00253       __is.width(__f._M_n);
    00254       return __is;
    00255     }
    00256
    00257   template<typename _CharT, typename _Traits>
    00258     inline basic_ostream<_CharT,_Traits>&
    00259     operator<<(basic_ostream<_CharT,_Traits>& __os, _Setw __f)
    00260     {
    00261       __os.width(__f._M_n);
    00262       return __os;
    00263     }
    00264
    00265   // Inhibit implicit instantiations for required instantiations,
    00266   // which are defined via explicit instantiations elsewhere.
    00267   // NB:  This syntax is a GNU extension.
    00268 #if _GLIBCXX_EXTERN_TEMPLATE
    00269   extern template ostream& operator<<(ostream&, _Setfill<char>);
    00270   extern template ostream& operator<<(ostream&, _Setiosflags);
    00271   extern template ostream& operator<<(ostream&, _Resetiosflags);
    00272   extern template ostream& operator<<(ostream&, _Setbase);
    00273   extern template ostream& operator<<(ostream&, _Setprecision);
    00274   extern template ostream& operator<<(ostream&, _Setw);
    00275   extern template istream& operator>>(istream&, _Setfill<char>);
    00276   extern template istream& operator>>(istream&, _Setiosflags);
    00277   extern template istream& operator>>(istream&, _Resetiosflags);
    00278   extern template istream& operator>>(istream&, _Setbase);
    00279   extern template istream& operator>>(istream&, _Setprecision);
    00280   extern template istream& operator>>(istream&, _Setw);
    00281
    00282 #ifdef _GLIBCXX_USE_WCHAR_T
    00283   extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
    00284   extern template wostream& operator<<(wostream&, _Setiosflags);
    00285   extern template wostream& operator<<(wostream&, _Resetiosflags);
    00286   extern template wostream& operator<<(wostream&, _Setbase);
    00287   extern template wostream& operator<<(wostream&, _Setprecision);
    00288   extern template wostream& operator<<(wostream&, _Setw);
    00289   extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
    00290   extern template wistream& operator>>(wistream&, _Setiosflags);
    00291   extern template wistream& operator>>(wistream&, _Resetiosflags);
    00292   extern template wistream& operator>>(wistream&, _Setbase);
    00293   extern template wistream& operator>>(wistream&, _Setprecision);
    00294   extern template wistream& operator>>(wistream&, _Setw);
    00295 #endif
    00296 #endif
    00297
    00298 _GLIBCXX_END_NAMESPACE
    00299
    00300 #endif /* _GLIBCXX_IOMANIP */