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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/**
* Numeric field types for AMQP
*
* @copyright 2014 - 2023 Copernica BV
*/
/**
* Include guard
*/
#pragma once
/**
* Dependencies
*/
#include <memory>
#include <type_traits>
#include "inbuffer.h"
#include "outbuffer.h"
#include "field.h"
#include <ostream>
/**
* Set up namespace
*/
namespace AMQP {
/**
* Template for numeric field types
*/
template<
typename T,
char F,
typename = typename std::enable_if<std::is_arithmetic<T>::value, T>
>
class NumericField : public Field
{
private:
/**
* Field value
*/
T _value;
public:
using Type = T;
/**
* Default constructor, assign 0
*/
NumericField() : _value(0) {}
/**
* Construct numeric field from
* one of numeric types
*
* @param value field value
*/
NumericField(T value) : _value(value) {}
/**
* Parse based on incoming buffer
* @param frame
*/
NumericField(InBuffer &frame)
{
// The Microsoft Visual Studio compiler thinks that there is an issue
// with the following code, so we temporarily disable a specific warning
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable : 4244)
#endif
if (std::is_same<int8_t, typename std::remove_cv<T>::type>::value) _value = frame.nextInt8();
else if (std::is_same<int16_t, typename std::remove_cv<T>::type>::value) _value = frame.nextInt16();
else if (std::is_same<int32_t, typename std::remove_cv<T>::type>::value) _value = frame.nextInt32();
else if (std::is_same<int64_t, typename std::remove_cv<T>::type>::value) _value = frame.nextInt64();
else if (std::is_same<uint8_t, typename std::remove_cv<T>::type>::value) _value = frame.nextUint8();
else if (std::is_same<uint16_t, typename std::remove_cv<T>::type>::value) _value = frame.nextUint16();
else if (std::is_same<uint32_t, typename std::remove_cv<T>::type>::value) _value = frame.nextUint32();
else if (std::is_same<uint64_t, typename std::remove_cv<T>::type>::value) _value = frame.nextUint64();
else if (std::is_same<float, typename std::remove_cv<T>::type>::value) _value = frame.nextFloat();
else if (std::is_same<double, typename std::remove_cv<T>::type>::value) _value = frame.nextDouble();
// re-enable the warning
#if defined(_MSC_VER)
#pragma warning( pop )
#endif
}
/**
* Destructor
*/
virtual ~NumericField() {}
/**
* Create a new instance of this object
* @return unique_ptr
*/
virtual std::unique_ptr<Field> clone() const override
{
// create a new copy of ourselves and return it
return std::unique_ptr<Field>(new NumericField(_value));
}
/**
* Assign a new value
*
* @param value new value for field
* @return NumericField
*/
NumericField& operator=(T value)
{
_value = value;
return *this;
};
/**
* Clear the field
* @return NumericField
*/
NumericField& clear()
{
_value = 0;
return *this;
}
/**
* Get the value
* @return mixed
*/
operator uint8_t () const override { return (uint8_t)_value; }
operator uint16_t() const override { return (uint16_t)_value; }
operator uint32_t() const override { return (uint32_t)_value; }
operator uint64_t() const override { return (uint64_t)_value; }
operator int8_t () const override { return (int8_t)_value; }
operator int16_t () const override { return (int16_t)_value; }
operator int32_t () const override { return (int32_t)_value; }
operator int64_t () const override { return (int64_t)_value; }
operator float () const override { return (float)_value; }
operator double () const override { return (double)_value; }
/**
* Get the value
* @return mixed
*/
T value() const
{
// return internal value
return _value;
}
/**
* We are an integer field
*
* @return true, because we are an integer
*/
bool isInteger() const override
{
return std::is_integral<T>::value;
}
/**
* Get the size this field will take when
* encoded in the AMQP wire-frame format
* @return size_t
*/
virtual size_t size() const override
{
// numeric types have no extra storage requirements
return sizeof(_value);
}
/**
* Write encoded payload to the given buffer.
* @param buffer OutBuffer to write to
*/
virtual void fill(OutBuffer& buffer) const override
{
// store converted value
T value = _value;
// write to buffer
// adding a value takes care of host to network byte order
buffer.add(value);
}
/**
* Get the type ID that is used to identify this type of
* field in a field table
*/
virtual char typeID() const override
{
return F;
}
/**
* Output the object to a stream
* @param std::ostream
*/
virtual void output(std::ostream &stream) const override
{
// show
stream << "numeric(" << value() << ")";
}
};
/**
* Concrete numeric types for AMQP
*/
typedef NumericField<int8_t, 'b'> Octet;
typedef NumericField<uint8_t, 'B'> UOctet;
typedef NumericField<int16_t, 'U'> Short;
typedef NumericField<uint16_t, 'u'> UShort;
typedef NumericField<int32_t, 'I'> Long;
typedef NumericField<uint32_t, 'i'> ULong;
typedef NumericField<int64_t, 'L'> LongLong;
typedef NumericField<uint64_t, 'l'> ULongLong;
typedef NumericField<uint64_t, 'T'> Timestamp;
/**
* Concrete floating-point types for AMQP
*/
typedef NumericField<float, 'f'> Float;
typedef NumericField<double, 'd'> Double;
/**
* end namespace
*/
}
|
