# iomanip

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    00001 // Standard stream manipulators -*- C++ -*-
    00002
    00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
    00004 // 2006, 2007, 2009
    00005 // Free Software Foundation, Inc.
    00006 //
    00007 // This file is part of the GNU ISO C++ Library.  This library is free
    00008 // software; you can redistribute it and/or modify it under the
    00009 // terms of the GNU General Public License as published by the
    00010 // Free Software Foundation; either version 3, or (at your option)
    00011 // any later version.
    00012
    00013 // This library is distributed in the hope that it will be useful,
    00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00016 // GNU General Public License for more details.
    00017
    00018 // Under Section 7 of GPL version 3, you are granted additional
    00019 // permissions described in the GCC Runtime Library Exception, version
    00020 // 3.1, as published by the Free Software Foundation.
    00021
    00022 // You should have received a copy of the GNU General Public License and
    00023 // a copy of the GCC Runtime Library Exception along with this program;
    00024 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    00025 // <http://www.gnu.org/licenses/>.
    00026
    00027 /** @file iomanip
    00028  *  This is a Standard C++ Library header.
    00029  */
    00030
    00031 //
    00032 // ISO C++ 14882: 27.6.3  Standard manipulators
    00033 //
    00034
    00035 #ifndef _GLIBCXX_IOMANIP
    00036 #define _GLIBCXX_IOMANIP 1
    00037
    00038 #pragma GCC system_header
    00039
    00040 #include <bits/c++config.h>
    00041 #include <iosfwd>
    00042 #include <bits/ios_base.h>
    00043
    00044 _GLIBCXX_BEGIN_NAMESPACE(std)
    00045
    00046   // [27.6.3] standard manipulators
    00047   // Also see DR 183.
    00048
    00049   struct _Resetiosflags { ios_base::fmtflags _M_mask; };
    00050
    00051   /**
    00052    *  @brief  Manipulator for @c setf.
    00053    *  @param  mask  A format flags mask.
    00054    *
    00055    *  Sent to a stream object, this manipulator resets the specified flags,
    00056    *  via @e stream.setf(0,mask).
    00057   */
    00058   inline _Resetiosflags
    00059   resetiosflags(ios_base::fmtflags __mask)
    00060   {
    00061     _Resetiosflags __x;
    00062     __x._M_mask = __mask;
    00063     return __x;
    00064   }
    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   {
    00095     _Setiosflags __x;
    00096     __x._M_mask = __mask;
    00097     return __x;
    00098   }
    00099
    00100   template<typename _CharT, typename _Traits>
    00101     inline basic_istream<_CharT, _Traits>&
    00102     operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
    00103     {
    00104       __is.setf(__f._M_mask);
    00105       return __is;
    00106     }
    00107
    00108   template<typename _CharT, typename _Traits>
    00109     inline basic_ostream<_CharT, _Traits>&
    00110     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
    00111     {
    00112       __os.setf(__f._M_mask);
    00113       return __os;
    00114     }
    00115
    00116
    00117   struct _Setbase { int _M_base; };
    00118
    00119   /**
    00120    *  @brief  Manipulator for @c setf.
    00121    *  @param  base  A numeric base.
    00122    *
    00123    *  Sent to a stream object, this manipulator changes the
    00124    *  @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
    00125    *  is 8, 10, or 16, accordingly, and to 0 if @a base is any other value.
    00126   */
    00127   inline _Setbase
    00128   setbase(int __base)
    00129   {
    00130     _Setbase __x;
    00131     __x._M_base = __base;
    00132     return __x;
    00133   }
    00134
    00135   template<typename _CharT, typename _Traits>
    00136     inline basic_istream<_CharT, _Traits>&
    00137     operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
    00138     {
    00139       __is.setf(__f._M_base ==  8 ? ios_base::oct :
    00140         __f._M_base == 10 ? ios_base::dec :
    00141         __f._M_base == 16 ? ios_base::hex :
    00142         ios_base::fmtflags(0), ios_base::basefield);
    00143       return __is;
    00144     }
    00145
    00146   template<typename _CharT, typename _Traits>
    00147     inline basic_ostream<_CharT, _Traits>&
    00148     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
    00149     {
    00150       __os.setf(__f._M_base ==  8 ? ios_base::oct :
    00151         __f._M_base == 10 ? ios_base::dec :
    00152         __f._M_base == 16 ? ios_base::hex :
    00153         ios_base::fmtflags(0), ios_base::basefield);
    00154       return __os;
    00155     }
    00156
    00157
    00158   template<typename _CharT>
    00159     struct _Setfill { _CharT _M_c; };
    00160
    00161   /**
    00162    *  @brief  Manipulator for @c fill.
    00163    *  @param  c  The new fill character.
    00164    *
    00165    *  Sent to a stream object, this manipulator calls @c fill(c) for that
    00166    *  object.
    00167   */
    00168   template<typename _CharT>
    00169     inline _Setfill<_CharT>
    00170     setfill(_CharT __c)
    00171     {
    00172       _Setfill<_CharT> __x;
    00173       __x._M_c = __c;
    00174       return __x;
    00175     }
    00176
    00177   template<typename _CharT, typename _Traits>
    00178     inline basic_istream<_CharT, _Traits>&
    00179     operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
    00180     {
    00181       __is.fill(__f._M_c);
    00182       return __is;
    00183     }
    00184
    00185   template<typename _CharT, typename _Traits>
    00186     inline basic_ostream<_CharT, _Traits>&
    00187     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
    00188     {
    00189       __os.fill(__f._M_c);
    00190       return __os;
    00191     }
    00192
    00193
    00194   struct _Setprecision { int _M_n; };
    00195
    00196   /**
    00197    *  @brief  Manipulator for @c precision.
    00198    *  @param  n  The new precision.
    00199    *
    00200    *  Sent to a stream object, this manipulator calls @c precision(n) for
    00201    *  that object.
    00202   */
    00203   inline _Setprecision
    00204   setprecision(int __n)
    00205   {
    00206     _Setprecision __x;
    00207     __x._M_n = __n;
    00208     return __x;
    00209   }
    00210
    00211   template<typename _CharT, typename _Traits>
    00212     inline basic_istream<_CharT, _Traits>&
    00213     operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
    00214     {
    00215       __is.precision(__f._M_n);
    00216       return __is;
    00217     }
    00218
    00219   template<typename _CharT, typename _Traits>
    00220     inline basic_ostream<_CharT, _Traits>&
    00221     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
    00222     {
    00223       __os.precision(__f._M_n);
    00224       return __os;
    00225     }
    00226
    00227
    00228   struct _Setw { int _M_n; };
    00229
    00230   /**
    00231    *  @brief  Manipulator for @c width.
    00232    *  @param  n  The new width.
    00233    *
    00234    *  Sent to a stream object, this manipulator calls @c width(n) for
    00235    *  that object.
    00236   */
    00237   inline _Setw
    00238   setw(int __n)
    00239   {
    00240     _Setw __x;
    00241     __x._M_n = __n;
    00242     return __x;
    00243   }
    00244
    00245   template<typename _CharT, typename _Traits>
    00246     inline basic_istream<_CharT, _Traits>&
    00247     operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
    00248     {
    00249       __is.width(__f._M_n);
    00250       return __is;
    00251     }
    00252
    00253   template<typename _CharT, typename _Traits>
    00254     inline basic_ostream<_CharT, _Traits>&
    00255     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
    00256     {
    00257       __os.width(__f._M_n);
    00258       return __os;
    00259     }
    00260
    00261   // Inhibit implicit instantiations for required instantiations,
    00262   // which are defined via explicit instantiations elsewhere.
    00263   // NB:  This syntax is a GNU extension.
    00264 #if _GLIBCXX_EXTERN_TEMPLATE
    00265   extern template ostream& operator<<(ostream&, _Setfill<char>);
    00266   extern template ostream& operator<<(ostream&, _Setiosflags);
    00267   extern template ostream& operator<<(ostream&, _Resetiosflags);
    00268   extern template ostream& operator<<(ostream&, _Setbase);
    00269   extern template ostream& operator<<(ostream&, _Setprecision);
    00270   extern template ostream& operator<<(ostream&, _Setw);
    00271   extern template istream& operator>>(istream&, _Setfill<char>);
    00272   extern template istream& operator>>(istream&, _Setiosflags);
    00273   extern template istream& operator>>(istream&, _Resetiosflags);
    00274   extern template istream& operator>>(istream&, _Setbase);
    00275   extern template istream& operator>>(istream&, _Setprecision);
    00276   extern template istream& operator>>(istream&, _Setw);
    00277
    00278 #ifdef _GLIBCXX_USE_WCHAR_T
    00279   extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
    00280   extern template wostream& operator<<(wostream&, _Setiosflags);
    00281   extern template wostream& operator<<(wostream&, _Resetiosflags);
    00282   extern template wostream& operator<<(wostream&, _Setbase);
    00283   extern template wostream& operator<<(wostream&, _Setprecision);
    00284   extern template wostream& operator<<(wostream&, _Setw);
    00285   extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
    00286   extern template wistream& operator>>(wistream&, _Setiosflags);
    00287   extern template wistream& operator>>(wistream&, _Resetiosflags);
    00288   extern template wistream& operator>>(wistream&, _Setbase);
    00289   extern template wistream& operator>>(wistream&, _Setprecision);
    00290   extern template wistream& operator>>(wistream&, _Setw);
    00291 #endif
    00292 #endif
    00293
    00294 _GLIBCXX_END_NAMESPACE
    00295
    00296 #endif /* _GLIBCXX_IOMANIP */