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
|
/**
* Copyright (c) 2007-2013, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef byte_array_hh
#define byte_array_hh
#include <ostream>
#include <string>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "base/lnav_log.hh"
#include "fmt/format.h"
#include "optional.hpp"
template<size_t COUNT, typename T = unsigned char>
struct byte_array {
static constexpr size_t BYTE_COUNT = COUNT * sizeof(T);
static constexpr size_t STRING_SIZE = BYTE_COUNT * 2 + 1;
byte_array() = default;
static byte_array from(std::initializer_list<T> bytes)
{
byte_array retval;
size_t index = 0;
for (const auto by : bytes) {
retval.ba_data[index++] = by;
}
return retval;
}
byte_array(const byte_array& other)
{
memcpy(this->ba_data, other.ba_data, BYTE_COUNT);
}
bool operator<(const byte_array& other) const
{
return memcmp(this->ba_data, other.ba_data, BYTE_COUNT) < 0;
}
bool operator!=(const byte_array& other) const
{
return memcmp(this->ba_data, other.ba_data, BYTE_COUNT) != 0;
}
bool operator==(const byte_array& other) const
{
return memcmp(this->ba_data, other.ba_data, BYTE_COUNT) == 0;
}
void clear() { memset(this->ba_data, 0, BYTE_COUNT); }
template<typename OutputIt>
void to_string(OutputIt out,
nonstd::optional<char> separator = nonstd::nullopt) const
{
for (size_t lpc = 0; lpc < BYTE_COUNT; lpc++) {
if (lpc > 0 && separator) {
*out = separator.value();
}
fmt::format_to(out, FMT_STRING("{:02x}"), this->ba_data[lpc]);
}
}
std::string to_uuid_string() const
{
return fmt::format(
FMT_STRING("{:02x}{:02x}{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-"
"{:02x}{:02x}-{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}"),
this->ba_data[0 % BYTE_COUNT],
this->ba_data[1 % BYTE_COUNT],
this->ba_data[2 % BYTE_COUNT],
this->ba_data[3 % BYTE_COUNT],
this->ba_data[4 % BYTE_COUNT],
this->ba_data[5 % BYTE_COUNT],
this->ba_data[6 % BYTE_COUNT],
this->ba_data[7 % BYTE_COUNT],
this->ba_data[8 % BYTE_COUNT],
this->ba_data[9 % BYTE_COUNT],
this->ba_data[10 % BYTE_COUNT],
this->ba_data[11 % BYTE_COUNT],
this->ba_data[12 % BYTE_COUNT],
this->ba_data[13 % BYTE_COUNT],
this->ba_data[14 % BYTE_COUNT],
this->ba_data[15 % BYTE_COUNT]);
}
std::string to_string(nonstd::optional<char> separator
= nonstd::nullopt) const
{
std::string retval;
retval.reserve(STRING_SIZE);
this->to_string(std::back_inserter(retval), separator);
return retval;
}
const unsigned char* in() const { return this->ba_data; }
T* out(int offset = 0)
{
T* ptr = (T*) this->ba_data;
return &ptr[offset];
}
unsigned char ba_data[BYTE_COUNT]{};
};
template<size_t COUNT, typename T = unsigned char>
std::ostream&
operator<<(std::ostream& os, const byte_array<COUNT, T>& ba)
{
os << ba.to_string();
return os;
}
#endif
|
