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  1. // Input streams -*- C++ -*-
  2.  
  3. // Copyright (C) 1997-1999, 2001 Free Software Foundation, Inc.
  4. //
  5. // This file is part of the GNU ISO C++ Library.  This library is free
  6. // software; you can redistribute it and/or modify it under the
  7. // terms of the GNU General Public License as published by the
  8. // Free Software Foundation; either version 2, or (at your option)
  9. // any later version.
  10.  
  11. // This library is distributed in the hope that it will be useful,
  12. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14. // GNU General Public License for more details.
  15.  
  16. // You should have received a copy of the GNU General Public License along
  17. // with this library; see the file COPYING.  If not, write to the Free
  18. // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19. // USA.
  20.  
  21. // As a special exception, you may use this file as part of a free software
  22. // library without restriction.  Specifically, if other files instantiate
  23. // templates or use macros or inline functions from this file, or you compile
  24. // this file and link it with other files to produce an executable, this
  25. // file does not by itself cause the resulting executable to be covered by
  26. // the GNU General Public License.  This exception does not however
  27. // invalidate any other reasons why the executable file might be covered by
  28. // the GNU General Public License.
  29.  
  30. //
  31. // ISO C++ 14882: 27.6.1  Input streams
  32. //
  33.  
  34. #ifndef _CPP_ISTREAM
  35. #define _CPP_ISTREAM    1
  36.  
  37. #pragma GCC system_header
  38.  
  39. #include <bits/std_ios.h>
  40. #include <bits/std_limits.h> // For numeric_limits
  41.  
  42. namespace std
  43. {
  44.   // 27.6.1.1 Template class basic_istream
  45.   template<typename _CharT, typename _Traits>
  46.     class basic_istream : virtual public basic_ios<_CharT, _Traits>
  47.     {
  48.     public:
  49.       // Types (inherited from basic_ios (27.4.4)):
  50.       typedef _CharT                                    char_type;
  51.       typedef typename _Traits::int_type                int_type;
  52.       typedef typename _Traits::pos_type                pos_type;
  53.       typedef typename _Traits::off_type                off_type;
  54.       typedef _Traits                                   traits_type;
  55.      
  56.       // Non-standard Types:
  57.       typedef basic_streambuf<_CharT, _Traits>          __streambuf_type;
  58.       typedef basic_ios<_CharT, _Traits>                __ios_type;
  59.       typedef basic_istream<_CharT, _Traits>            __istream_type;
  60.       typedef istreambuf_iterator<_CharT, _Traits>      __istreambuf_iter;
  61.       typedef num_get<_CharT, __istreambuf_iter>        __numget_type;
  62.       typedef ctype<_CharT>                             __ctype_type;
  63.  
  64.     protected:
  65.       // Data Members:
  66.       streamsize                _M_gcount;
  67.  
  68.     public:
  69.       // 27.6.1.1.1 Constructor/destructor:
  70.       explicit
  71.       basic_istream(__streambuf_type* __sb)
  72.       {
  73.         this->init(__sb);
  74.         _M_gcount = streamsize(0);
  75.       }
  76.  
  77.       virtual
  78.       ~basic_istream()
  79.       { _M_gcount = streamsize(0); }
  80.  
  81.       // 27.6.1.1.2 Prefix/suffix:
  82.       class sentry;
  83.       friend class sentry;
  84.  
  85.       // 27.6.1.2 Formatted input:
  86.       // 27.6.1.2.3 basic_istream::operator>>
  87.       __istream_type&
  88.       operator>>(__istream_type& (*__pf)(__istream_type&));
  89.  
  90.       __istream_type&
  91.       operator>>(__ios_type& (*__pf)(__ios_type&));
  92.  
  93.       __istream_type&
  94.       operator>>(ios_base& (*__pf)(ios_base&));
  95.      
  96.       // 27.6.1.2.2 Arithmetic Extractors
  97.       __istream_type&
  98.       operator>>(bool& __n);
  99.      
  100.       __istream_type&
  101.       operator>>(short& __n);
  102.      
  103.       __istream_type&
  104.       operator>>(unsigned short& __n);
  105.  
  106.       __istream_type&
  107.       operator>>(int& __n);
  108.      
  109.       __istream_type&
  110.       operator>>(unsigned int& __n);
  111.  
  112.       __istream_type&
  113.       operator>>(long& __n);
  114.      
  115.       __istream_type&
  116.       operator>>(unsigned long& __n);
  117.  
  118. #ifdef _GLIBCPP_USE_LONG_LONG
  119.       __istream_type&
  120.       operator>>(long long& __n);
  121.  
  122.       __istream_type&
  123.       operator>>(unsigned long long& __n);
  124. #endif
  125.  
  126.       __istream_type&
  127.       operator>>(float& __f);
  128.  
  129.       __istream_type&
  130.       operator>>(double& __f);
  131.  
  132.       __istream_type&
  133.       operator>>(long double& __f);
  134.  
  135.       __istream_type&
  136.       operator>>(void*& __p);
  137.  
  138.       __istream_type&
  139.       operator>>(__streambuf_type* __sb);
  140.      
  141.       // 27.6.1.3 Unformatted input:
  142.       inline streamsize
  143.       gcount(void) const
  144.       { return _M_gcount; }
  145.      
  146.       int_type
  147.       get(void);
  148.  
  149.       __istream_type&
  150.       get(char_type& __c);
  151.  
  152.       __istream_type&
  153.       get(char_type* __s, streamsize __n, char_type __delim);
  154.  
  155.       inline __istream_type&
  156.       get(char_type* __s, streamsize __n)
  157.       { return get(__s, __n, this->widen('\n')); }
  158.  
  159.       __istream_type&
  160.       get(__streambuf_type& __sb, char_type __delim);
  161.  
  162.       inline __istream_type&
  163.       get(__streambuf_type& __sb)
  164.       { return get(__sb, this->widen('\n')); }
  165.  
  166.       __istream_type&
  167.       getline(char_type* __s, streamsize __n, char_type __delim);
  168.  
  169.       inline __istream_type&
  170.       getline(char_type* __s, streamsize __n)
  171.       { return getline(__s, __n, this->widen('\n')); }
  172.  
  173.       __istream_type&
  174.       ignore(streamsize __n = 1, int_type __delim = traits_type::eof());
  175.      
  176.       int_type
  177.       peek(void);
  178.      
  179.       __istream_type&
  180.       read(char_type* __s, streamsize __n);
  181.  
  182.       streamsize
  183.       readsome(char_type* __s, streamsize __n);
  184.      
  185.       __istream_type&
  186.       putback(char_type __c);
  187.  
  188.       __istream_type&
  189.       unget(void);
  190.  
  191.       int
  192.       sync(void);
  193.  
  194.       pos_type
  195.       tellg(void);
  196.  
  197.       __istream_type&
  198.       seekg(pos_type);
  199.  
  200.       __istream_type&
  201.       seekg(off_type, ios_base::seekdir);
  202.  
  203.     private:
  204. #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
  205.       // Not defined.
  206.       __istream_type&
  207.       operator=(const __istream_type&);
  208.  
  209.       basic_istream(const __istream_type&);
  210. #endif
  211.     };
  212.  
  213.   template<typename _CharT, typename _Traits>
  214.     class basic_istream<_CharT, _Traits>::sentry
  215.     {
  216.     public:
  217.       typedef _Traits                                   traits_type;
  218.       typedef basic_streambuf<_CharT, _Traits>          __streambuf_type;
  219.       typedef basic_istream<_CharT, _Traits>            __istream_type;
  220.       typedef __istream_type::__ctype_type              __ctype_type;
  221.       typedef typename _Traits::int_type                __int_type;
  222.  
  223.       explicit
  224.       sentry(basic_istream<_CharT, _Traits>& __is, bool __noskipws = false);
  225.  
  226.       operator bool() { return _M_ok; }
  227.  
  228.     private:
  229.       bool _M_ok;
  230.     };
  231.  
  232.   // 27.6.1.2.3 Character extraction templates
  233.   template<typename _CharT, typename _Traits>
  234.     basic_istream<_CharT, _Traits>&
  235.     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c);
  236.  
  237.   template<class _Traits>
  238.     basic_istream<char, _Traits>&
  239.     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
  240.     { return (__in >> reinterpret_cast<char&>(__c)); }
  241.  
  242.   template<class _Traits>
  243.     basic_istream<char, _Traits>&
  244.     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
  245.     { return (__in >> reinterpret_cast<char&>(__c)); }
  246.  
  247.   template<typename _CharT, typename _Traits>
  248.     basic_istream<_CharT, _Traits>&
  249.     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s);
  250.  
  251.   template<class _Traits>
  252.     basic_istream<char,_Traits>&
  253.     operator>>(basic_istream<char,_Traits>& __in, unsigned char* __s)
  254.     { return (__in >> reinterpret_cast<char*>(__s)); }
  255.  
  256.   template<class _Traits>
  257.     basic_istream<char,_Traits>&
  258.     operator>>(basic_istream<char,_Traits>& __in, signed char* __s)
  259.     { return (__in >> reinterpret_cast<char*>(__s)); }
  260.  
  261.   // 27.6.1.5 Template class basic_iostream
  262.   template<typename _CharT, typename _Traits>
  263.     class basic_iostream
  264.     : public basic_istream<_CharT, _Traits>,
  265.       public basic_ostream<_CharT, _Traits>
  266.     {
  267.     public:
  268.       // Non-standard Types:
  269.       typedef basic_istream<_CharT, _Traits>            __istream_type;
  270.       typedef basic_ostream<_CharT, _Traits>            __ostream_type;
  271.  
  272.       explicit
  273.       basic_iostream(basic_streambuf<_CharT, _Traits>* __sb)
  274.       : __istream_type(__sb), __ostream_type(__sb)
  275.       { }
  276.  
  277.       virtual
  278.       ~basic_iostream() { }
  279.     };
  280.  
  281.   // 27.6.1.4 Standard basic_istream manipulators
  282.   template<typename _CharT, typename _Traits>
  283.     basic_istream<_CharT, _Traits>&
  284.     ws(basic_istream<_CharT, _Traits>& __is);
  285. } // namespace std
  286.  
  287. #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
  288. # define export
  289. #ifdef  _GLIBCPP_FULLY_COMPLIANT_HEADERS
  290. # include <bits/istream.tcc>
  291. #endif
  292. #endif
  293.  
  294. #endif  /* _CPP_ISTREAM */
  295.  
  296.