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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2010, SIL International, All rights reserved.
// designed to have a limited subset of the std::vector api
#pragma once
#include <cstddef>
#include <cassert>
#include <cstring>
#include <cstdlib>
#include <new>
#include "Main.h"
namespace graphite2 {
template <typename T>
inline
ptrdiff_t distance(T* first, T* last) { return last-first; }
template <typename T>
class Vector
{
T * m_first, *m_last, *m_end;
public:
typedef T & reference;
typedef const T & const_reference;
typedef T * iterator;
typedef const T * const_iterator;
Vector() : m_first(0), m_last(0), m_end(0) {}
Vector(size_t n, const T& value = T()) : m_first(0), m_last(0), m_end(0) { insert(begin(), n, value); }
Vector(const Vector<T> &rhs) : m_first(0), m_last(0), m_end(0) { insert(begin(), rhs.begin(), rhs.end()); }
template <typename I>
Vector(I first, const I last) : m_first(0), m_last(0), m_end(0) { insert(begin(), first, last); }
~Vector() { clear(); free(m_first); }
iterator begin() { return m_first; }
const_iterator begin() const { return m_first; }
iterator end() { return m_last; }
const_iterator end() const { return m_last; }
bool empty() const { return m_first == m_last; }
size_t size() const { return m_last - m_first; }
size_t capacity() const{ return m_end - m_first; }
void reserve(size_t n);
void resize(size_t n, const T & v = T());
reference front() { assert(size() > 0); return *begin(); }
const_reference front() const { assert(size() > 0); return *begin(); }
reference back() { assert(size() > 0); return *(end()-1); }
const_reference back() const { assert(size() > 0); return *(end()-1); }
Vector<T> & operator = (const Vector<T> & rhs) { assign(rhs.begin(), rhs.end()); return *this; }
reference operator [] (size_t n) { assert(size() > n); return m_first[n]; }
const_reference operator [] (size_t n) const { assert(size() > n); return m_first[n]; }
void assign(size_t n, const T& u) { clear(); insert(begin(), n, u); }
void assign(const_iterator first, const_iterator last) { clear(); insert(begin(), first, last); }
iterator insert(iterator p, const T & x) { p = _insert_default(p, 1); new (p) T(x); return p; }
void insert(iterator p, size_t n, const T & x);
void insert(iterator p, const_iterator first, const_iterator last);
void pop_back() { assert(size() > 0); --m_last; }
void push_back(const T &v) { if (m_last == m_end) reserve(size()+1); new (m_last++) T(v); }
void clear() { erase(begin(), end()); }
iterator erase(iterator p) { return erase(p, p+1); }
iterator erase(iterator first, iterator last);
private:
iterator _insert_default(iterator p, size_t n);
};
template <typename T>
inline
void Vector<T>::reserve(size_t n)
{
if (n > capacity())
{
const ptrdiff_t sz = size();
size_t requested;
if (checked_mul(n,sizeof(T), requested)) std::abort();
m_first = static_cast<T*>(realloc(m_first, requested));
if (!m_first) std::abort();
m_last = m_first + sz;
m_end = m_first + n;
}
}
template <typename T>
inline
void Vector<T>::resize(size_t n, const T & v) {
const ptrdiff_t d = n-size();
if (d < 0) erase(end()+d, end());
else if (d > 0) insert(end(), d, v);
}
template<typename T>
inline
typename Vector<T>::iterator Vector<T>::_insert_default(iterator p, size_t n)
{
assert(begin() <= p && p <= end());
const ptrdiff_t i = p - begin();
reserve(((size() + n + 7) >> 3) << 3);
p = begin() + i;
// Move tail if there is one
if (p != end()) memmove(p + n, p, distance(p,end())*sizeof(T));
m_last += n;
return p;
}
template<typename T>
inline
void Vector<T>::insert(iterator p, size_t n, const T & x)
{
p = _insert_default(p, n);
// Copy in elements
for (; n; --n, ++p) { new (p) T(x); }
}
template<typename T>
inline
void Vector<T>::insert(iterator p, const_iterator first, const_iterator last)
{
p = _insert_default(p, distance(first, last));
// Copy in elements
for (;first != last; ++first, ++p) { new (p) T(*first); }
}
template<typename T>
inline
typename Vector<T>::iterator Vector<T>::erase(iterator first, iterator last)
{
for (iterator e = first; e != last; ++e) e->~T();
const size_t sz = distance(first, last);
if (m_last != last) memmove(first, last, distance(last,end())*sizeof(T));
m_last -= sz;
return first;
}
} // namespace graphite2
|