ostream

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00001 // Output streams -*- C++ -*-
00002 
00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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 //
00032 // ISO C++ 14882: 27.6.2  Output streams
00033 //
00034 
00040 #ifndef _CPP_OSTREAM
00041 #define _CPP_OSTREAM    1
00042 
00043 #pragma GCC system_header
00044 
00045 #include <ios>
00046 
00047 namespace std
00048 {
00049   // [27.6.2.1] Template class basic_ostream
00057   template<typename _CharT, typename _Traits>
00058     class basic_ostream : virtual public basic_ios<_CharT, _Traits>
00059     {
00060     public:
00061       // Types (inherited from basic_ios (27.4.4)):
00062       typedef _CharT                            char_type;
00063       typedef typename _Traits::int_type        int_type;
00064       typedef typename _Traits::pos_type        pos_type;
00065       typedef typename _Traits::off_type        off_type;
00066       typedef _Traits                           traits_type;
00067       
00068       // Non-standard Types:
00069       typedef basic_streambuf<_CharT, _Traits>      __streambuf_type;
00070       typedef basic_ios<_CharT, _Traits>        __ios_type;
00071       typedef basic_ostream<_CharT, _Traits>        __ostream_type;
00072       typedef ostreambuf_iterator<_CharT, _Traits>  __ostreambuf_iter;
00073       typedef num_put<_CharT, __ostreambuf_iter>        __numput_type;
00074       typedef ctype<_CharT>                     __ctype_type;
00075 
00076       // [27.6.2.2] constructor/destructor
00084       explicit 
00085       basic_ostream(__streambuf_type* __sb)
00086       { this->init(__sb); }
00087 
00093       virtual 
00094       ~basic_ostream() { }
00095 
00096       // [27.6.2.3] prefix/suffix
00097       class sentry;
00098       friend class sentry;
00099       
00100       // [27.6.2.5] formatted output
00101       // [27.6.2.5.3]  basic_ostream::operator<<
00103 
00110       __ostream_type&
00111       operator<<(__ostream_type& (*__pf)(__ostream_type&));
00112       
00113       __ostream_type&
00114       operator<<(__ios_type& (*__pf)(__ios_type&));
00115       
00116       __ostream_type&
00117       operator<<(ios_base& (*__pf) (ios_base&));
00119 
00120       // [27.6.2.5.2] arithmetic inserters
00147       __ostream_type& 
00148       operator<<(long __n);
00149       
00150       __ostream_type& 
00151       operator<<(unsigned long __n);
00152 
00153       __ostream_type& 
00154       operator<<(bool __n);
00155 
00156       __ostream_type& 
00157       operator<<(short __n)
00158       { 
00159     ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
00160     if (__fmt & ios_base::oct || __fmt & ios_base::hex)
00161       return this->operator<<(static_cast<unsigned long>
00162                   (static_cast<unsigned short>(__n)));
00163     else
00164       return this->operator<<(static_cast<long>(__n));
00165       }
00166 
00167       __ostream_type& 
00168       operator<<(unsigned short __n)
00169       { return this->operator<<(static_cast<unsigned long>(__n)); }
00170 
00171       __ostream_type& 
00172       operator<<(int __n)
00173       { 
00174     ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
00175     if (__fmt & ios_base::oct || __fmt & ios_base::hex)
00176       return this->operator<<(static_cast<unsigned long>
00177                   (static_cast<unsigned int>(__n)));
00178     else
00179       return this->operator<<(static_cast<long>(__n));
00180       }
00181 
00182       __ostream_type& 
00183       operator<<(unsigned int __n)
00184       { return this->operator<<(static_cast<unsigned long>(__n)); }
00185 
00186 #ifdef _GLIBCPP_USE_LONG_LONG
00187       __ostream_type& 
00188       operator<<(long long __n);
00189 
00190       __ostream_type& 
00191       operator<<(unsigned long long __n);
00192 #endif
00193 
00194       __ostream_type& 
00195       operator<<(double __f);
00196 
00197       __ostream_type& 
00198       operator<<(float __f)
00199       { return this->operator<<(static_cast<double>(__f)); }
00200 
00201       __ostream_type& 
00202       operator<<(long double __f);
00203 
00204       __ostream_type& 
00205       operator<<(const void* __p);
00206 
00228       __ostream_type& 
00229       operator<<(__streambuf_type* __sb);
00231 
00232       // [27.6.2.6] unformatted output functions
00261       __ostream_type& 
00262       put(char_type __c);
00263 
00280       __ostream_type& 
00281       write(const char_type* __s, streamsize __n);
00283 
00293       __ostream_type& 
00294       flush();
00295 
00296       // [27.6.2.4] seek members
00304       pos_type 
00305       tellp();
00306 
00315       __ostream_type& 
00316       seekp(pos_type);
00317 
00327        __ostream_type& 
00328       seekp(off_type, ios_base::seekdir);
00329     };
00330 
00341   template <typename _CharT, typename _Traits>
00342     class basic_ostream<_CharT, _Traits>::sentry
00343     {
00344       // Data Members:
00345       bool              _M_ok;
00346       basic_ostream<_CharT,_Traits>&    _M_os;
00347       
00348     public:
00360       explicit
00361       sentry(basic_ostream<_CharT,_Traits>& __os);
00362 
00370       ~sentry()
00371       {
00372     // XXX MT
00373     if (_M_os.flags() & ios_base::unitbuf && !uncaught_exception())
00374       {
00375         // Can't call flush directly or else will get into recursive lock.
00376         if (_M_os.rdbuf() && _M_os.rdbuf()->pubsync() == -1)
00377           _M_os.setstate(ios_base::badbit);
00378       }
00379       }
00380 
00388       operator bool() 
00389       { return _M_ok; }
00390     };
00391 
00392   // [27.6.2.5.4] character insertion templates
00394 
00409   template<typename _CharT, typename _Traits>
00410     basic_ostream<_CharT, _Traits>&
00411     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c);
00412 
00413   template<typename _CharT, typename _Traits>
00414     basic_ostream<_CharT, _Traits>&
00415     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
00416     { return (__out << __out.widen(__c)); }
00417 
00418   // Specialization
00419   template <class _Traits> 
00420     basic_ostream<char, _Traits>&
00421     operator<<(basic_ostream<char, _Traits>& __out, char __c);
00422 
00423   // Signed and unsigned
00424   template<class _Traits>
00425     basic_ostream<char, _Traits>&
00426     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
00427     { return (__out << static_cast<char>(__c)); }
00428   
00429   template<class _Traits>
00430     basic_ostream<char, _Traits>&
00431     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
00432     { return (__out << static_cast<char>(__c)); }
00434   
00436 
00449   template<typename _CharT, typename _Traits>
00450     basic_ostream<_CharT, _Traits>&
00451     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s);
00452 
00453   template<typename _CharT, typename _Traits>
00454     basic_ostream<_CharT, _Traits> &
00455     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s);
00456 
00457   // Partial specializationss
00458   template<class _Traits>
00459     basic_ostream<char, _Traits>&
00460     operator<<(basic_ostream<char, _Traits>& __out, const char* __s);
00461  
00462   // Signed and unsigned
00463   template<class _Traits>
00464     basic_ostream<char, _Traits>&
00465     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
00466     { return (__out << reinterpret_cast<const char*>(__s)); }
00467 
00468   template<class _Traits>
00469     basic_ostream<char, _Traits> &
00470     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
00471     { return (__out << reinterpret_cast<const char*>(__s)); }
00473 
00474   // [27.6.2.7] standard basic_ostream manipulators
00483   template<typename _CharT, typename _Traits>
00484     basic_ostream<_CharT, _Traits>& 
00485     endl(basic_ostream<_CharT, _Traits>& __os)
00486     { return flush(__os.put(__os.widen('\n'))); }
00487 
00494   template<typename _CharT, typename _Traits>
00495     basic_ostream<_CharT, _Traits>& 
00496     ends(basic_ostream<_CharT, _Traits>& __os)
00497     { return __os.put(_CharT()); }
00498   
00504   template<typename _CharT, typename _Traits>
00505     basic_ostream<_CharT, _Traits>& 
00506     flush(basic_ostream<_CharT, _Traits>& __os)
00507     { return __os.flush(); }
00508 
00509 } // namespace std
00510 
00511 #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
00512 # define export
00513 #endif
00514 #ifdef  _GLIBCPP_FULLY_COMPLIANT_HEADERS
00515 # include <bits/ostream.tcc>
00516 #endif
00517 
00518 #endif  /* _CPP_OSTREAM */

Generated on Thu Nov 21 03:12:49 2002 for libstdc++-v3 Source by doxygen1.2.18-20021030