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
|
/*
* Copyright (c) 2010 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/StringCodecs/Hexify.h>
#include <sstream>
#include <iomanip>
#include <boost/numeric/conversion/cast.hpp>
#include <string>
#include <Swiften/Base/ByteArray.h>
#pragma clang diagnostic ignored "-Wconversion"
namespace Swift {
std::string Hexify::hexify(unsigned char byte) {
std::ostringstream result;
result << std::hex << std::setw(2) << std::setfill('0') << boost::numeric_cast<unsigned int>(byte);
return std::string(result.str());
}
std::string Hexify::hexify(const ByteArray& data) {
std::ostringstream result;
result << std::hex;
for (unsigned int i = 0; i < data.size(); ++i) {
result << std::setw(2) << std::setfill('0') << boost::numeric_cast<unsigned int>(static_cast<unsigned char>(data[i]));
}
return std::string(result.str());
}
static const unsigned char map[256] = {
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 255, 255, 255, 255, 255, 255,
255, 10, 11, 12, 13, 14, 15, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 10, 11, 12, 13, 14, 15, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255
};
ByteArray Hexify::unhexify(const std::string& in) {
if (in.size() % 2) {
return ByteArray();
}
ByteArray result(in.size() / 2);
for (size_t pos = 0; pos < in.size() - 1; pos += 2) {
unsigned char a = map[static_cast<size_t>(in[pos])];
unsigned char b = map[static_cast<size_t>(in[pos+1])];
if (a == 255 || b == 255) {
return ByteArray();
}
result[pos/2] = (a<<4) | b;
}
return result;
}
}
|
Swift