epoc32/include/stdapis/stlport/stl/_istreambuf_iterator.h
branchSymbian3
changeset 4 837f303aceeb
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/epoc32/include/stdapis/stlport/stl/_istreambuf_iterator.h	Wed Mar 31 12:33:34 2010 +0100
     1.3 @@ -0,0 +1,169 @@
     1.4 +/*
     1.5 + * Copyright (c) 1999
     1.6 + * Silicon Graphics Computer Systems, Inc.
     1.7 + *
     1.8 + * Copyright (c) 1999 
     1.9 + * Boris Fomitchev
    1.10 + *
    1.11 + * This material is provided "as is", with absolutely no warranty expressed
    1.12 + * or implied. Any use is at your own risk.
    1.13 + *
    1.14 + * Permission to use or copy this software for any purpose is hereby granted 
    1.15 + * without fee, provided the above notices are retained on all copies.
    1.16 + * Permission to modify the code and to distribute modified code is granted,
    1.17 + * provided the above notices are retained, and a notice that the code was
    1.18 + * modified is included with the above copyright notice.
    1.19 + *
    1.20 + */ 
    1.21 +// WARNING: This is an internal header file, included by other C++
    1.22 +// standard library headers.  You should not attempt to use this header
    1.23 +// file directly.
    1.24 +
    1.25 +
    1.26 +#ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
    1.27 +#define _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
    1.28 +
    1.29 +#ifndef _STLP_INTERNAL_ITERATOR_BASE_H
    1.30 +# include <stl/_iterator_base.h>
    1.31 +#endif
    1.32 +
    1.33 +#ifndef _STLP_INTERNAL_STREAMBUF
    1.34 +# include <stl/_streambuf.h>
    1.35 +#endif
    1.36 +
    1.37 +_STLP_BEGIN_NAMESPACE
    1.38 +
    1.39 +// defined in _istream.h
    1.40 +template <class _CharT, class _Traits>
    1.41 +extern basic_streambuf<_CharT, _Traits>* _STLP_CALL _M_get_istreambuf(basic_istream<_CharT, _Traits>& ) ;
    1.42 +
    1.43 +// We do not read any characters until operator* is called. operator* calls sgetc 
    1.44 +// unless the iterator is unchanged from the last call in which case a cached value is
    1.45 +// used. Calls to operator++ use sbumpc.
    1.46 +
    1.47 +template<class _CharT, class _Traits>
    1.48 +class istreambuf_iterator
    1.49 +{
    1.50 +public:
    1.51 +  typedef _CharT                           char_type;
    1.52 +  typedef _Traits                          traits_type;
    1.53 +  typedef typename _Traits::int_type       int_type;
    1.54 +  typedef basic_streambuf<_CharT, _Traits> streambuf_type;
    1.55 +  typedef basic_istream<_CharT, _Traits>   istream_type;
    1.56 +
    1.57 +  typedef input_iterator_tag               iterator_category;
    1.58 +  typedef _CharT                           value_type;
    1.59 +  typedef typename _Traits::off_type       difference_type;
    1.60 +  typedef const _CharT*                    pointer;
    1.61 +  typedef const _CharT&                    reference;
    1.62 +
    1.63 +public:
    1.64 +  istreambuf_iterator(streambuf_type* __p = 0) { this->_M_init(__p); }
    1.65 +  //  istreambuf_iterator(basic_istream<_CharT, _Traits>& __is) { this->_M_init(_M_get_istreambuf(__is)); }
    1.66 +  inline istreambuf_iterator(basic_istream<_CharT, _Traits>& __is);
    1.67 +
    1.68 +  char_type operator*() const { this->_M_getc(); return _M_c; }
    1.69 +  istreambuf_iterator<_CharT, _Traits>& operator++() { this->_M_bumpc(); return *this; }
    1.70 +  istreambuf_iterator<_CharT, _Traits>  operator++(int);
    1.71 +
    1.72 +  bool equal(const istreambuf_iterator<_CharT, _Traits>& __i) const {
    1.73 +    if (this->_M_buf)
    1.74 +      this->_M_getc();
    1.75 +    if (__i._M_buf)
    1.76 +      __i._M_getc(); 
    1.77 +    return this->_M_eof == __i._M_eof;
    1.78 +  }
    1.79 +
    1.80 +private:
    1.81 +  void _M_init(streambuf_type* __p) {
    1.82 +    _M_buf = __p;
    1.83 +    _M_eof = !__p;
    1.84 +    //    _M_is_initialized = _M_eof;
    1.85 +    _M_have_c = false;
    1.86 +  }
    1.87 +
    1.88 +  void _M_getc() const {
    1.89 +    if (_M_have_c)
    1.90 +      return;
    1.91 +    int_type __c = _M_buf->sgetc();
    1.92 +# if !defined (_STLP_NEED_MUTABLE) /* && ! defined (__SUNPRO_CC) */
    1.93 +    _M_c = traits_type::to_char_type(__c);
    1.94 +    _M_eof = traits_type::eq_int_type(__c, traits_type::eof());
    1.95 +    _M_have_c = true;
    1.96 +# else
    1.97 +    typedef istreambuf_iterator<_CharT,_Traits> _Self;
    1.98 +    _Self* __that = __CONST_CAST(_Self*, this);
    1.99 +    __that->_M_c = __STATIC_CAST(_CharT, traits_type::to_char_type(__c));
   1.100 +    __that->_M_eof = traits_type::eq_int_type(__c, traits_type::eof());
   1.101 +    __that->_M_have_c = true;
   1.102 +# endif
   1.103 +  }
   1.104 +
   1.105 +  int_type _M_bumpc() {
   1.106 +  	int_type ch = _M_buf->sbumpc();
   1.107 +     _M_have_c = false;
   1.108 +	 return ch;
   1.109 +  }
   1.110 +
   1.111 +private:
   1.112 +  streambuf_type* _M_buf;
   1.113 +  mutable _CharT _M_c;
   1.114 +  mutable unsigned char _M_eof;
   1.115 +  mutable unsigned char _M_have_c;
   1.116 +};
   1.117 +
   1.118 +template<class _CharT, class _Traits>
   1.119 +inline istreambuf_iterator<_CharT, _Traits>::istreambuf_iterator(basic_istream<_CharT, _Traits>& __is) 
   1.120 +{ this->_M_init(_M_get_istreambuf(__is)); }
   1.121 +
   1.122 +template<class _CharT, class _Traits>
   1.123 +inline bool _STLP_CALL operator==(const istreambuf_iterator<_CharT, _Traits>& __x,
   1.124 +                                  const istreambuf_iterator<_CharT, _Traits>& __y) {
   1.125 +  return __x.equal(__y);
   1.126 +}
   1.127 +
   1.128 +#ifdef _STLP_USE_SEPARATE_RELOPS_NAMESPACE
   1.129 +
   1.130 +template<class _CharT, class _Traits>
   1.131 +inline bool _STLP_CALL operator!=(const istreambuf_iterator<_CharT, _Traits>& __x,
   1.132 +                                  const istreambuf_iterator<_CharT, _Traits>& __y) {
   1.133 +  return !__x.equal(__y);
   1.134 +}
   1.135 +
   1.136 +#endif /* _STLP_USE_SEPARATE_RELOPS_NAMESPACE */
   1.137 +
   1.138 +# if defined (_STLP_USE_TEMPLATE_EXPORT)
   1.139 +_STLP_EXPORT_TEMPLATE_CLASS istreambuf_iterator<char, char_traits<char> >;
   1.140 +#  if defined (INSTANTIATE_WIDE_STREAMS)
   1.141 +_STLP_EXPORT_TEMPLATE_CLASS istreambuf_iterator<wchar_t, char_traits<wchar_t> >;
   1.142 +#  endif
   1.143 +# endif /* _STLP_USE_TEMPLATE_EXPORT */
   1.144 +
   1.145 +# ifdef _STLP_USE_OLD_HP_ITERATOR_QUERIES
   1.146 +template <class _CharT, class _Traits>
   1.147 +inline input_iterator_tag _STLP_CALL iterator_category(const istreambuf_iterator<_CharT, _Traits>&) { return input_iterator_tag(); }
   1.148 +template <class _CharT, class _Traits>
   1.149 +inline streamoff* _STLP_CALL 
   1.150 +distance_type(const istreambuf_iterator<_CharT, _Traits>&) { return (streamoff*)0; }
   1.151 +template <class _CharT, class _Traits>
   1.152 +inline _CharT* _STLP_CALL value_type(const istreambuf_iterator<_CharT, _Traits>&) { return (_CharT*)0; }
   1.153 +# endif
   1.154 +
   1.155 +template <class _CharT, class _Traits>
   1.156 +istreambuf_iterator<_CharT, _Traits>
   1.157 +istreambuf_iterator<_CharT, _Traits>::operator++(int) {
   1.158 +  istreambuf_iterator<_CharT, _Traits> __tmp = *this;
   1.159 +  __tmp._M_c = this->_M_bumpc();
   1.160 +  __tmp._M_have_c = true;
   1.161 +  this->_M_have_c = false;
   1.162 +  return __tmp;
   1.163 +}
   1.164 +
   1.165 +_STLP_END_NAMESPACE
   1.166 +
   1.167 +#endif /* _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H */
   1.168 +
   1.169 +// Local Variables:
   1.170 +// mode:C++
   1.171 +// End:
   1.172 +