ReactOS 0.4.15-dev-7907-g95bf896
_istreambuf_iterator.h
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1/*
2 * Copyright (c) 1999
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Copyright (c) 1999
6 * Boris Fomitchev
7 *
8 * This material is provided "as is", with absolutely no warranty expressed
9 * or implied. Any use is at your own risk.
10 *
11 * Permission to use or copy this software for any purpose is hereby granted
12 * without fee, provided the above notices are retained on all copies.
13 * Permission to modify the code and to distribute modified code is granted,
14 * provided the above notices are retained, and a notice that the code was
15 * modified is included with the above copyright notice.
16 *
17 */
18// WARNING: This is an internal header file, included by other C++
19// standard library headers. You should not attempt to use this header
20// file directly.
21
22
23#ifndef _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
24#define _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H
25
26#ifndef _STLP_INTERNAL_ITERATOR_BASE_H
27# include <stl/_iterator_base.h>
28#endif
29
30#ifndef _STLP_INTERNAL_STREAMBUF
31# include <stl/_streambuf.h>
32#endif
33
35
36// defined in _istream.h
37template <class _CharT, class _Traits>
39
40// We do not read any characters until operator* is called. operator* calls sgetc
41// unless the iterator is unchanged from the last call in which case a cached value is
42// used. Calls to operator++ use sbumpc.
43
44template<class _CharT, class _Traits>
46 public iterator<input_iterator_tag, _CharT, typename _Traits::off_type, _CharT*, _CharT&>
47{
48public:
49 typedef _CharT char_type;
50 typedef _Traits traits_type;
51 typedef typename _Traits::int_type int_type;
54
56 typedef _CharT value_type;
57 typedef typename _Traits::off_type difference_type;
58 typedef const _CharT* pointer;
59 typedef const _CharT& reference;
60
61public:
62 istreambuf_iterator(streambuf_type* __p = 0) { this->_M_init(__p); }
63 // istreambuf_iterator(basic_istream<_CharT, _Traits>& __is) { this->_M_init(_M_get_istreambuf(__is)); }
65
66 char_type operator*() const { this->_M_getc(); return _M_c; }
68 _M_buf->sbumpc();
69 _M_have_c = false;
70 return *this;
71 }
73
75 if (this->_M_buf)
76 this->_M_getc();
77 if (__i._M_buf)
78 __i._M_getc();
79 return this->_M_eof == __i._M_eof;
80 }
81
82private:
84 _M_buf = __p;
85 _M_eof = (__p == 0);
86 _M_have_c = false;
87 }
88
89 void _M_getc() const {
90 if (_M_have_c)
91 return;
93 _STLP_MUTABLE(_Self, _M_c) = traits_type::to_char_type(__c);
94 _STLP_MUTABLE(_Self, _M_eof) = traits_type::eq_int_type(__c, traits_type::eof());
95 _STLP_MUTABLE(_Self, _M_have_c) = true;
96 }
97
98private:
100 mutable _CharT _M_c;
101 mutable bool _M_eof;
102 mutable bool _M_have_c;
103};
104
105template<class _CharT, class _Traits>
107{ this->_M_init(_M_get_istreambuf(__is)); }
108
109template<class _CharT, class _Traits>
112 return __x.equal(__y);
113}
114
115#ifdef _STLP_USE_SEPARATE_RELOPS_NAMESPACE
116
117template<class _CharT, class _Traits>
120 return !__x.equal(__y);
121}
122
123#endif /* _STLP_USE_SEPARATE_RELOPS_NAMESPACE */
124
125# if defined (_STLP_USE_TEMPLATE_EXPORT)
127# if defined (INSTANTIATE_WIDE_STREAMS)
129# endif
130# endif /* _STLP_USE_TEMPLATE_EXPORT */
131
132# ifdef _STLP_USE_OLD_HP_ITERATOR_QUERIES
133template <class _CharT, class _Traits>
135template <class _CharT, class _Traits>
136inline streamoff* _STLP_CALL
137distance_type(const istreambuf_iterator<_CharT, _Traits>&) { return (streamoff*)0; }
138template <class _CharT, class _Traits>
139inline _CharT* _STLP_CALL value_type(const istreambuf_iterator<_CharT, _Traits>&) { return (_CharT*)0; }
140# endif
141
142template <class _CharT, class _Traits>
145 _M_getc(); // __tmp should avoid any future actions under
146 // underlined buffer---during call of operator *()
147 // (due to buffer for *this and __tmp are the same).
149 _M_buf->sbumpc();
150 _M_have_c = false;
151 return __tmp;
152}
153
155
156#endif /* _STLP_INTERNAL_ISTREAMBUF_ITERATOR_H */
157
158// Local Variables:
159// mode:C++
160// End:
161
#define input_iterator_tag
Definition: _abbrevs.h:25
bool _STLP_CALL operator!=(const allocator< _T1 > &, const allocator< _T2 > &) _STLP_NOTHROW
Definition: _alloc.h:384
#define _STLP_CALL
Definition: _bc.h:131
_STLP_BEGIN_NAMESPACE basic_streambuf< _CharT, _Traits > *_STLP_CALL _M_get_istreambuf(basic_istream< _CharT, _Traits > &)
Definition: _istream.h:346
bool _STLP_CALL operator==(const istreambuf_iterator< _CharT, _Traits > &__x, const istreambuf_iterator< _CharT, _Traits > &__y)
off_t streamoff
Definition: char_traits.h:74
int_type sbumpc()
Definition: _streambuf.h:227
int_type sgetc()
Definition: _streambuf.h:233
input_iterator_tag iterator_category
_Traits::off_type difference_type
basic_streambuf< _CharT, _Traits > streambuf_type
void _M_init(streambuf_type *__p)
bool equal(const istreambuf_iterator< _CharT, _Traits > &__i) const
char_type operator*() const
_Traits::int_type int_type
basic_istream< _CharT, _Traits > istream_type
streambuf_type * _M_buf
istreambuf_iterator(streambuf_type *__p=0)
istreambuf_iterator< _CharT, _Traits > & operator++()
#define _STLP_MUTABLE(type, x)
Definition: features.h:634
#define _STLP_EXPORT_TEMPLATE_CLASS
Definition: features.h:987
#define _STLP_BEGIN_NAMESPACE
Definition: features.h:501
#define _STLP_END_NAMESPACE
Definition: features.h:503
#define __c
Definition: schilyio.h:209