Buffer.cc
2.16 KB
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
#include <qpdf/assert_test.h>
#include <qpdf/Buffer.hh>
class Buffer::Members
{
friend class Buffer;
public:
Members() = default;
// Constructor for Buffers that don't own the memory.
Members(size_t size, char* buf) :
size(size),
buf(buf)
{
}
Members(std::string&& content) :
str(std::move(content)),
size(str.size()),
buf(str.data())
{
}
Members(Members const&) = delete;
~Members() = default;
private:
std::string str;
size_t size;
char* buf;
};
Buffer::Buffer() :
m(std::make_unique<Members>())
{
}
Buffer::Buffer(size_t size) :
m(std::make_unique<Members>(std::string(size, '\0')))
{
}
Buffer::Buffer(std::string&& content) :
m(std::make_unique<Members>(std::move(content)))
{
}
Buffer::Buffer(unsigned char* buf, size_t size) :
m(std::make_unique<Members>(size, reinterpret_cast<char*>(buf)))
{
}
Buffer::Buffer(std::string& content) :
m(std::make_unique<Members>(content.size(), content.data()))
{
}
Buffer::Buffer(Buffer&& rhs) noexcept :
m(std::move(rhs.m))
{
}
Buffer&
Buffer::operator=(Buffer&& rhs) noexcept
{
std::swap(m, rhs.m);
return *this;
}
Buffer::~Buffer() = default;
size_t
Buffer::getSize() const
{
return m->size;
}
unsigned char const*
Buffer::getBuffer() const
{
return reinterpret_cast<unsigned char*>(m->buf);
}
unsigned char*
Buffer::getBuffer()
{
return reinterpret_cast<unsigned char*>(m->buf);
}
Buffer
Buffer::copy() const
{
if (m->size == 0) {
return {};
}
return {std::string(m->buf, m->size)};
}
std::string
Buffer::move()
{
if (m->size == 0) {
return {};
}
if (!m->str.empty()) {
m->size = 0;
m->buf = nullptr;
return std::move(m->str);
}
return {m->buf, m->size};
}
std::string_view
Buffer::view() const
{
if (!m->buf) {
return {};
}
return {m->buf, m->size};
}
char const*
Buffer::data() const
{
return m->buf ? m->buf : m->str.data();
}
char*
Buffer::data()
{
return m->buf ? m->buf : m->str.data();
}
bool
Buffer::empty() const
{
return m->size == 0;
}
size_t
Buffer::size() const
{
return m->size;
}