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Whole document tree                   std_istream.h Go to the documentation of this file. // Input streams -*- C++ -*- // Copyright (C) 1997-1999, 2001 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 2, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING. If not, write to the Free // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, // USA. // As a special exception, you may use this file as part of a free software // library without restriction. Specifically, if other files instantiate // templates or use macros or inline functions from this file, or you compile // this file and link it with other files to produce an executable, this // file does not by itself cause the resulting executable to be covered by // the GNU General Public License. This exception does not however // invalidate any other reasons why the executable file might be covered by // the GNU General Public License. // // ISO C++ 14882: 27.6.1 Input streams // #ifndef _CPP_ISTREAM #define _CPP_ISTREAM 1 #pragma GCC system_header #include <bits/std_ios.h> #include <bits/std_limits.h> // For numeric_limits namespace std { // 27.6.1.1 Template class basic_istream template<typename _CharT, typename _Traits> class basic_istream : virtual public basic_ios<_CharT, _Traits> { public: // Types (inherited from basic_ios (27.4.4)): typedef _CharT char_type; typedef typename _Traits::int_type int_type; typedef typename _Traits::pos_type pos_type; typedef typename _Traits::off_type off_type; typedef _Traits traits_type; // Non-standard Types: typedef basic_streambuf<_CharT, _Traits> __streambuf_type; typedef basic_ios<_CharT, _Traits> __ios_type; typedef basic_istream<_CharT, _Traits> __istream_type; typedef istreambuf_iterator<_CharT, _Traits> __istreambuf_iter; typedef num_get<_CharT, __istreambuf_iter> __numget_type; typedef ctype<_CharT> __ctype_type; protected: // Data Members: streamsize _M_gcount; public: // 27.6.1.1.1 Constructor/destructor: explicit basic_istream(__streambuf_type* __sb) { this->init(__sb); _M_gcount = streamsize(0); } virtual ~basic_istream() { _M_gcount = streamsize(0); } // 27.6.1.1.2 Prefix/suffix: class sentry; friend class sentry; // 27.6.1.2 Formatted input: // 27.6.1.2.3 basic_istream::operator>> __istream_type& operator>>(__istream_type& (*__pf)(__istream_type&)); __istream_type& operator>>(__ios_type& (*__pf)(__ios_type&)); __istream_type& operator>>(ios_base& (*__pf)(ios_base&)); // 27.6.1.2.2 Arithmetic Extractors __istream_type& operator>>(bool& __n); __istream_type& operator>>(short& __n); __istream_type& operator>>(unsigned short& __n); __istream_type& operator>>(int& __n); __istream_type& operator>>(unsigned int& __n); __istream_type& operator>>(long& __n); __istream_type& operator>>(unsigned long& __n); #ifdef _GLIBCPP_USE_LONG_LONG __istream_type& operator>>(long long& __n); __istream_type& operator>>(unsigned long long& __n); #endif __istream_type& operator>>(float& __f); __istream_type& operator>>(double& __f); __istream_type& operator>>(long double& __f); __istream_type& operator>>(void*& __p); __istream_type& operator>>(__streambuf_type* __sb); // 27.6.1.3 Unformatted input: inline streamsize gcount(void) const { return _M_gcount; } int_type get(void); __istream_type& get(char_type& __c); __istream_type& get(char_type* __s, streamsize __n, char_type __delim); inline __istream_type& get(char_type* __s, streamsize __n) { return get(__s, __n, this->widen('\n')); } __istream_type& get(__streambuf_type& __sb, char_type __delim); inline __istream_type& get(__streambuf_type& __sb) { return get(__sb, this->widen('\n')); } __istream_type& getline(char_type* __s, streamsize __n, char_type __delim); inline __istream_type& getline(char_type* __s, streamsize __n) { return getline(__s, __n, this->widen('\n')); } __istream_type& ignore(streamsize __n = 1, int_type __delim = traits_type::eof()); int_type peek(void); __istream_type& read(char_type* __s, streamsize __n); streamsize readsome(char_type* __s, streamsize __n); __istream_type& putback(char_type __c); __istream_type& unget(void); int sync(void); pos_type tellg(void); __istream_type& seekg(pos_type); __istream_type& seekg(off_type, ios_base::seekdir); private: #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS // Not defined. __istream_type& operator=(const __istream_type&); basic_istream(const __istream_type&); #endif }; template<typename _CharT, typename _Traits> class basic_istream<_CharT, _Traits>::sentry { public: typedef _Traits traits_type; typedef basic_streambuf<_CharT, _Traits> __streambuf_type; typedef basic_istream<_CharT, _Traits> __istream_type; typedef typename __istream_type::__ctype_type __ctype_type; typedef typename _Traits::int_type __int_type; explicit sentry(basic_istream<_CharT, _Traits>& __is, bool __noskipws = false); operator bool() { return _M_ok; } private: bool _M_ok; }; // 27.6.1.2.3 Character extraction templates template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c); template<class _Traits> basic_istream<char, _Traits>& operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c) { return (__in >> reinterpret_cast<char&>(__c)); } template<class _Traits> basic_istream<char, _Traits>& operator>>(basic_istream<char, _Traits>& __in, signed char& __c) { return (__in >> reinterpret_cast<char&>(__c)); } template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s); template<class _Traits> basic_istream<char,_Traits>& operator>>(basic_istream<char,_Traits>& __in, unsigned char* __s) { return (__in >> reinterpret_cast<char*>(__s)); } template<class _Traits> basic_istream<char,_Traits>& operator>>(basic_istream<char,_Traits>& __in, signed char* __s) { return (__in >> reinterpret_cast<char*>(__s)); } // 27.6.1.5 Template class basic_iostream template<typename _CharT, typename _Traits> class basic_iostream : public basic_istream<_CharT, _Traits>, public basic_ostream<_CharT, _Traits> { public: // Non-standard Types: typedef basic_istream<_CharT, _Traits> __istream_type; typedef basic_ostream<_CharT, _Traits> __ostream_type; explicit basic_iostream(basic_streambuf<_CharT, _Traits>* __sb) : __istream_type(__sb), __ostream_type(__sb) { } virtual ~basic_iostream() { } }; // 27.6.1.4 Standard basic_istream manipulators template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& ws(basic_istream<_CharT, _Traits>& __is); } // namespace std #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT # define export #ifdef _GLIBCPP_FULLY_COMPLIANT_HEADERS # include <bits/istream.tcc> #endif #endif #endif /* _CPP_ISTREAM */