# 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 */