ostream

Go to the documentation of this file.
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       template<typename _CharT2, typename _Traits2>
00077         friend basic_ostream<_CharT2, _Traits2>&
00078         operator<<(basic_ostream<_CharT2, _Traits2>&, _CharT2);
00079  
00080       template<typename _Traits2>
00081         friend basic_ostream<char, _Traits2>&
00082         operator<<(basic_ostream<char, _Traits2>&, char);
00083  
00084       template<typename _CharT2, typename _Traits2>
00085         friend basic_ostream<_CharT2, _Traits2>&
00086         operator<<(basic_ostream<_CharT2, _Traits2>&, const _CharT2*);
00087  
00088       template<typename _Traits2>
00089         friend basic_ostream<char, _Traits2>&
00090         operator<<(basic_ostream<char, _Traits2>&, const char*);
00091  
00092       template<typename _CharT2, typename _Traits2>
00093         friend basic_ostream<_CharT2, _Traits2>&
00094         operator<<(basic_ostream<_CharT2, _Traits2>&, const char*);
00095 
00096       // [27.6.2.2] constructor/destructor
00104       explicit 
00105       basic_ostream(__streambuf_type* __sb)
00106       { this->init(__sb); }
00107 
00113       virtual 
00114       ~basic_ostream() { }
00115 
00116       // [27.6.2.3] prefix/suffix
00117       class sentry;
00118       friend class sentry;
00119       
00120       // [27.6.2.5] formatted output
00121       // [27.6.2.5.3]  basic_ostream::operator<<
00123 
00130       __ostream_type&
00131       operator<<(__ostream_type& (*__pf)(__ostream_type&));
00132       
00133       __ostream_type&
00134       operator<<(__ios_type& (*__pf)(__ios_type&));
00135       
00136       __ostream_type&
00137       operator<<(ios_base& (*__pf) (ios_base&));
00139 
00140       // [27.6.2.5.2] arithmetic inserters
00167       __ostream_type& 
00168       operator<<(long __n);
00169       
00170       __ostream_type& 
00171       operator<<(unsigned long __n);
00172 
00173       __ostream_type& 
00174       operator<<(bool __n);
00175 
00176       __ostream_type& 
00177       operator<<(short __n)
00178       { 
00179     ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
00180     if (__fmt & ios_base::oct || __fmt & ios_base::hex)
00181       return this->operator<<(static_cast<unsigned long>
00182                   (static_cast<unsigned short>(__n)));
00183     else
00184       return this->operator<<(static_cast<long>(__n));
00185       }
00186 
00187       __ostream_type& 
00188       operator<<(unsigned short __n)
00189       { return this->operator<<(static_cast<unsigned long>(__n)); }
00190 
00191       __ostream_type& 
00192       operator<<(int __n)
00193       { 
00194     ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
00195     if (__fmt & ios_base::oct || __fmt & ios_base::hex)
00196       return this->operator<<(static_cast<unsigned long>
00197                   (static_cast<unsigned int>(__n)));
00198     else
00199       return this->operator<<(static_cast<long>(__n));
00200       }
00201 
00202       __ostream_type& 
00203       operator<<(unsigned int __n)
00204       { return this->operator<<(static_cast<unsigned long>(__n)); }
00205 
00206 #ifdef _GLIBCPP_USE_LONG_LONG
00207       __ostream_type& 
00208       operator<<(long long __n);
00209 
00210       __ostream_type& 
00211       operator<<(unsigned long long __n);
00212 #endif
00213 
00214       __ostream_type& 
00215       operator<<(double __f);
00216 
00217       __ostream_type& 
00218       operator<<(float __f)
00219       { return this->operator<<(static_cast<double>(__f)); }
00220 
00221       __ostream_type& 
00222       operator<<(long double __f);
00223 
00224       __ostream_type& 
00225       operator<<(const void* __p);
00226 
00248       __ostream_type& 
00249       operator<<(__streambuf_type* __sb);
00251 
00252       // [27.6.2.6] unformatted output functions
00281       __ostream_type& 
00282       put(char_type __c);
00283 
00300       __ostream_type& 
00301       write(const char_type* __s, streamsize __n);
00303 
00313       __ostream_type& 
00314       flush();
00315 
00316       // [27.6.2.4] seek members
00324       pos_type 
00325       tellp();
00326 
00335       __ostream_type& 
00336       seekp(pos_type);
00337 
00347        __ostream_type& 
00348       seekp(off_type, ios_base::seekdir);
00349     };
00350 
00361   template <typename _CharT, typename _Traits>
00362     class basic_ostream<_CharT, _Traits>::sentry
00363     {
00364       // Data Members:
00365       bool              _M_ok;
00366       basic_ostream<_CharT,_Traits>&    _M_os;
00367       
00368     public:
00380       explicit
00381       sentry(basic_ostream<_CharT,_Traits>& __os);
00382 
00390       ~sentry()
00391       {
00392     // XXX MT
00393     if (_M_os.flags() & ios_base::unitbuf && !uncaught_exception())
00394       {
00395         // Can't call flush directly or else will get into recursive lock.
00396         if (_M_os.rdbuf() && _M_os.rdbuf()->pubsync() == -1)
00397           _M_os.setstate(ios_base::badbit);
00398       }
00399       }
00400 
00408       operator bool() 
00409       { return _M_ok; }
00410     };
00411 
00412   // [27.6.2.5.4] character insertion templates
00414 
00429   template<typename _CharT, typename _Traits>
00430     basic_ostream<_CharT, _Traits>&
00431     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c);
00432 
00433   template<typename _CharT, typename _Traits>
00434     basic_ostream<_CharT, _Traits>&
00435     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
00436     { return (__out << __out.widen(__c)); }
00437 
00438   // Specialization
00439   template <class _Traits> 
00440     basic_ostream<char, _Traits>&
00441     operator<<(basic_ostream<char, _Traits>& __out, char __c);
00442 
00443   // Signed and unsigned
00444   template<class _Traits>
00445     basic_ostream<char, _Traits>&
00446     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
00447     { return (__out << static_cast<char>(__c)); }
00448   
00449   template<class _Traits>
00450     basic_ostream<char, _Traits>&
00451     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
00452     { return (__out << static_cast<char>(__c)); }
00454   
00456 
00469   template<typename _CharT, typename _Traits>
00470     basic_ostream<_CharT, _Traits>&
00471     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s);
00472 
00473   template<typename _CharT, typename _Traits>
00474     basic_ostream<_CharT, _Traits> &
00475     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s);
00476 
00477   // Partial specializationss
00478   template<class _Traits>
00479     basic_ostream<char, _Traits>&
00480     operator<<(basic_ostream<char, _Traits>& __out, const char* __s);
00481  
00482   // Signed and unsigned
00483   template<class _Traits>
00484     basic_ostream<char, _Traits>&
00485     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
00486     { return (__out << reinterpret_cast<const char*>(__s)); }
00487 
00488   template<class _Traits>
00489     basic_ostream<char, _Traits> &
00490     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
00491     { return (__out << reinterpret_cast<const char*>(__s)); }
00493 
00494   // [27.6.2.7] standard basic_ostream manipulators
00503   template<typename _CharT, typename _Traits>
00504     basic_ostream<_CharT, _Traits>& 
00505     endl(basic_ostream<_CharT, _Traits>& __os)
00506     { return flush(__os.put(__os.widen('\n'))); }
00507 
00514   template<typename _CharT, typename _Traits>
00515     basic_ostream<_CharT, _Traits>& 
00516     ends(basic_ostream<_CharT, _Traits>& __os)
00517     { return __os.put(_CharT()); }
00518   
00524   template<typename _CharT, typename _Traits>
00525     basic_ostream<_CharT, _Traits>& 
00526     flush(basic_ostream<_CharT, _Traits>& __os)
00527     { return __os.flush(); }
00528 
00529 } // namespace std
00530 
00531 #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
00532 # define export
00533 #endif
00534 #ifdef  _GLIBCPP_FULLY_COMPLIANT_HEADERS
00535 # include <bits/ostream.tcc>
00536 #endif
00537 
00538 #endif  /* _CPP_OSTREAM */

Generated on Tue Apr 29 20:16:22 2003 for libstdc++-v3 Source by doxygen1.3