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stringz_iterator.h
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1 /*
2  Copyright (c) 2009 KJK::Hyperion
3 
4  Permission is hereby granted, free of charge, to any person obtaining a
5  copy of this software and associated documentation files (the "Software"),
6  to deal in the Software without restriction, including without limitation
7  the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  and/or sell copies of the Software, and to permit persons to whom the
9  Software is furnished to do so, subject to the following conditions:
10 
11  The above copyright notice and this permission notice shall be included in
12  all copies or substantial portions of the Software.
13 
14  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20  DEALINGS IN THE SOFTWARE.
21 */
22 
23 #ifndef KJK_STRINGZ_ITERATOR_H_
24 #define KJK_STRINGZ_ITERATOR_H_
25 
26 #include <cstddef>
27 #include <iterator>
28 
29 namespace kjk
30 {
31  template<class Type, class Traits = std::char_traits<Type> > class stringz_iterator;
32 
33  template<class CharT> stringz_iterator<CharT> stringz_begin(const CharT *);
34  template<class Traits, class CharT> stringz_iterator<CharT, Traits> stringz_begin(const CharT *);
35 
36  template<class CharT> stringz_iterator<CharT> stringz_end(const CharT *);
37  template<class Traits, class CharT> stringz_iterator<CharT, Traits> stringz_end(const CharT *);
38 
39  template<class Type, class Traits>
40  class stringz_iterator: public std::iterator<std::forward_iterator_tag, Type, std::ptrdiff_t, const Type *, const Type&>
41  {
42  private:
43  template<class CharT2> friend stringz_iterator<CharT2> stringz_begin(const CharT2 *);
44  template<class Traits2, class CharT2> friend stringz_iterator<CharT2, Traits2> stringz_begin(const CharT2 *);
45 
46  template<class CharT2> friend stringz_iterator<CharT2> stringz_end(const CharT2 *);
47  template<class Traits2, class CharT2> friend stringz_iterator<CharT2, Traits2> stringz_end(const CharT2 *);
48 
49  // FIXME: this sucks because GCC sucks
50  typedef const Type * pointer_;
51  typedef const Type& reference_;
52 
54 
56  {
57  if(p != 0 && Traits::eq_int_type(Traits::to_int_type(*p), 0))
58  return 0;
59  else
60  return p;
61  }
62 
64 
65  public:
68 
70  {
71  m_p = set_pointer(That.m_p);
72  return *this;
73  }
74 
75  bool operator==(const stringz_iterator& That) const
76  {
77  return m_p == That.m_p;
78  }
79 
80  bool operator!=(const stringz_iterator& That) const
81  {
82  return m_p != That.m_p;
83  }
84 
85  reference_ operator*() const { return *m_p; }
86 
88  {
89  m_p = set_pointer(m_p + 1);
90  return *this;
91  }
92 
94  {
95  stringz_iterator oldValue(*this);
96  ++ (*this);
97  return oldValue;
98  }
99 
100  pointer_ base() const { return m_p; }
101  };
102 
103  template<class CharT>
105  {
106  return stringz_iterator<CharT>(p);
107  }
108 
109  template<class Traits, class CharT>
111  {
113  }
114 
115  template<class CharT>
117  {
118  return stringz_iterator<CharT>(0);
119  }
120 
121  template<class Traits, class CharT>
123  {
125  }
126 }
127 
128 #endif
129 
130 // EOF
stringz_iterator operator++(int)
stringz_iterator< CharT > stringz_begin(const CharT *)
stringz_iterator(const stringz_iterator &That)
const stringz_iterator & operator=(const stringz_iterator &That)
stringz_iterator< CharT > stringz_end(const CharT *)
const stringz_iterator & operator++()
Type
Definition: Type.h:6
WDF_CHILD_LIST_ITERATOR iterator
friend stringz_iterator< CharT2 > stringz_begin(const CharT2 *)
friend stringz_iterator< CharT2 > stringz_end(const CharT2 *)
bool operator==(const stringz_iterator &That) const
pointer_ base() const
bool operator!=(const stringz_iterator &That) const
GLfloat GLfloat p
Definition: glext.h:8902
stringz_iterator(pointer_ p)
static pointer_ set_pointer(pointer_ p)
reference_ operator *() const