1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
Author: Shane Neph & Scott Kuehn
Date: Tue Aug 28 09:36:24 PDT 2007
*/
//
// BEDOPS
// Copyright (C) 2011-2022 Shane Neph, Scott Kuehn and Alex Reynolds
//
// This program 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 of the License, or
// (at your option) any later version.
//
// This program 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 program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#ifndef SPECIAL_ALLOCATE_NEW_ITERATOR_HPP
#define SPECIAL_ALLOCATE_NEW_ITERATOR_HPP
#include <iterator>
#include <cstddef>
#include <cstdio>
namespace Ext {
template <class _Tp>
class allocate_iterator;
template <class _Tp>
class allocate_iterator<_Tp*> {
public:
typedef std::forward_iterator_tag iterator_category;
typedef _Tp* value_type;
typedef std::ptrdiff_t difference_type;
typedef _Tp** pointer;
typedef _Tp*& reference;
allocate_iterator() : _M_ok(false), fp_(NULL), _M_value(0) {}
allocate_iterator(FILE* fp) /* this ASSUMES fp is open and meaningful */
: _M_ok(fp && !std::feof(fp)), fp_(fp), _M_value(_M_ok ? new _Tp(fp) : 0)
{
_M_ok = (_M_ok && fp && !std::feof(fp));
if ( !_M_ok && fp_ )
fp_ = NULL;
}
reference operator*() { return _M_value; }
pointer operator->() { return &(operator*()); }
allocate_iterator& operator++() {
if ( _M_ok ) {
_M_value = (new _Tp(fp_));
_M_ok = !std::feof(fp_);
}
return *this;
}
allocate_iterator operator++(int) {
allocate_iterator __tmp = *this;
if ( _M_ok ) {
_M_value = (new _Tp(fp_));
_M_ok = !std::feof(fp_);
}
return __tmp;
}
bool _M_equal(const allocate_iterator& __x) const
{ return ( (_M_ok == __x._M_ok) && (!_M_ok || fp_ == __x.fp_) ); }
private:
bool _M_ok;
FILE* fp_;
_Tp* _M_value;
};
template <class _Tp>
inline bool
operator==(const allocate_iterator<_Tp>& __x,
const allocate_iterator<_Tp>& __y) {
return __x._M_equal(__y);
}
template <class _Tp>
inline bool
operator!=(const allocate_iterator<_Tp>& __x,
const allocate_iterator<_Tp>& __y) {
return !__x._M_equal(__y);
}
} // namespace Ext
#endif // SPECIAL_ALLOCATE_NEW_ITERATOR_HPP
|
