basic_ios.h

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00001 // Iostreams base classes -*- C++ -*- 00002 00003 // Copyright (C) 1997, 1998, 1999, 2001, 2002 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 2, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License along 00017 // with this library; see the file COPYING. If not, write to the Free 00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 00019 // USA. 00020 00021 // As a special exception, you may use this file as part of a free software 00022 // library without restriction. Specifically, if other files instantiate 00023 // templates or use macros or inline functions from this file, or you compile 00024 // this file and link it with other files to produce an executable, this 00025 // file does not by itself cause the resulting executable to be covered by 00026 // the GNU General Public License. This exception does not however 00027 // invalidate any other reasons why the executable file might be covered by 00028 // the GNU General Public License. 00029 00035 #ifndef _CPP_BITS_BASICIOS_H 00036 #define _CPP_BITS_BASICIOS_H 1 00037 00038 #pragma GCC system_header 00039 00040 #include <bits/streambuf_iterator.h> 00041 #include <bits/locale_facets.h> 00042 00043 namespace std 00044 { 00045 // 27.4.5 Template class basic_ios 00046 template<typename _CharT, typename _Traits> 00047 class basic_ios : public ios_base 00048 { 00049 public: 00050 // Types: 00051 typedef _CharT char_type; 00052 typedef typename _Traits::int_type int_type; 00053 typedef typename _Traits::pos_type pos_type; 00054 typedef typename _Traits::off_type off_type; 00055 typedef _Traits traits_type; 00056 00057 // Non-standard Types: 00058 typedef ctype<_CharT> __ctype_type; 00059 typedef ostreambuf_iterator<_CharT, _Traits> __ostreambuf_iter; 00060 typedef num_put<_CharT, __ostreambuf_iter> __numput_type; 00061 typedef istreambuf_iterator<_CharT, _Traits> __istreambuf_iter; 00062 typedef num_get<_CharT, __istreambuf_iter> __numget_type; 00063 00064 // Data members: 00065 protected: 00066 basic_ostream<_CharT, _Traits>* _M_tie; 00067 mutable char_type _M_fill; 00068 mutable bool _M_fill_init; 00069 basic_streambuf<_CharT, _Traits>* _M_streambuf; 00070 00071 // Cached use_facet<ctype>, which is based on the current locale info. 00072 const __ctype_type* _M_fctype; 00073 // From ostream. 00074 const __numput_type* _M_fnumput; 00075 // From istream. 00076 const __numget_type* _M_fnumget; 00077 00078 public: 00079 operator void*() const 00080 { return this->fail() ? 0 : const_cast<basic_ios*>(this); } 00081 00082 bool 00083 operator!() const 00084 { return this->fail(); } 00085 00086 iostate 00087 rdstate() const 00088 { return _M_streambuf_state; } 00089 00090 void 00091 clear(iostate __state = goodbit); 00092 00093 void 00094 setstate(iostate __state) 00095 { this->clear(this->rdstate() | __state); } 00096 00097 bool 00098 good() const 00099 { return this->rdstate() == 0; } 00100 00101 bool 00102 eof() const 00103 { return (this->rdstate() & eofbit) != 0; } 00104 00105 bool 00106 fail() const 00107 { return (this->rdstate() & (badbit | failbit)) != 0; } 00108 00109 bool 00110 bad() const 00111 { return (this->rdstate() & badbit) != 0; } 00112 00113 iostate 00114 exceptions() const 00115 { return _M_exception; } 00116 00117 void 00118 exceptions(iostate __except) 00119 { 00120 _M_exception = __except; 00121 this->clear(_M_streambuf_state); 00122 } 00123 00124 // Constructor/destructor: 00125 explicit 00126 basic_ios(basic_streambuf<_CharT, _Traits>* __sb) : ios_base() 00127 { this->init(__sb); } 00128 00129 virtual 00130 ~basic_ios() { } 00131 00132 // Members: 00133 basic_ostream<_CharT, _Traits>* 00134 tie() const 00135 { return _M_tie; } 00136 00137 basic_ostream<_CharT, _Traits>* 00138 tie(basic_ostream<_CharT, _Traits>* __tiestr) 00139 { 00140 basic_ostream<_CharT, _Traits>* __old = _M_tie; 00141 _M_tie = __tiestr; 00142 return __old; 00143 } 00144 00145 basic_streambuf<_CharT, _Traits>* 00146 rdbuf() const 00147 { return _M_streambuf; } 00148 00149 basic_streambuf<_CharT, _Traits>* 00150 rdbuf(basic_streambuf<_CharT, _Traits>* __sb); 00151 00152 basic_ios& 00153 copyfmt(const basic_ios& __rhs); 00154 00155 char_type 00156 fill() const 00157 { 00158 if (!_M_fill_init) 00159 { 00160 _M_fill = this->widen(' '); 00161 _M_fill_init = true; 00162 } 00163 return _M_fill; 00164 } 00165 00166 char_type 00167 fill(char_type __ch) 00168 { 00169 char_type __old = this->fill(); 00170 _M_fill = __ch; 00171 return __old; 00172 } 00173 00174 // Locales: 00175 locale 00176 imbue(const locale& __loc); 00177 00178 char 00179 narrow(char_type __c, char __dfault) const; 00180 00181 char_type 00182 widen(char __c) const; 00183 00184 protected: 00185 // 27.4.5.1 basic_ios constructors 00186 basic_ios() : ios_base() 00187 { } 00188 00189 void 00190 init(basic_streambuf<_CharT, _Traits>* __sb); 00191 00192 bool 00193 _M_check_facet(const locale::facet* __f) const 00194 { 00195 if (!__f) 00196 __throw_bad_cast(); 00197 return true; 00198 } 00199 00200 void 00201 _M_cache_facets(const locale& __loc); 00202 }; 00203 } // namespace std 00204 00205 #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT 00206 # define export 00207 #include <bits/basic_ios.tcc> 00208 #endif 00209 00210 #endif /* _CPP_BITS_BASICIOS_H */

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