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
|
<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Guid;
use Ramsey\Uuid\Exception\InvalidArgumentException;
use Ramsey\Uuid\Fields\SerializableFieldsTrait;
use Ramsey\Uuid\Rfc4122\FieldsInterface;
use Ramsey\Uuid\Rfc4122\NilTrait;
use Ramsey\Uuid\Rfc4122\VariantTrait;
use Ramsey\Uuid\Rfc4122\VersionTrait;
use Ramsey\Uuid\Type\Hexadecimal;
use Ramsey\Uuid\Uuid;
use function bin2hex;
use function dechex;
use function hexdec;
use function pack;
use function sprintf;
use function str_pad;
use function strlen;
use function substr;
use function unpack;
use const STR_PAD_LEFT;
/**
* GUIDs are comprised of a set of named fields, according to RFC 4122
*
* @see Guid
*
* @psalm-immutable
*/
final class Fields implements FieldsInterface
{
use NilTrait;
use SerializableFieldsTrait;
use VariantTrait;
use VersionTrait;
/**
* @var string
*/
private $bytes;
/**
* @param string $bytes A 16-byte binary string representation of a UUID
*
* @throws InvalidArgumentException if the byte string is not exactly 16 bytes
* @throws InvalidArgumentException if the byte string does not represent a GUID
* @throws InvalidArgumentException if the byte string does not contain a valid version
*/
public function __construct(string $bytes)
{
if (strlen($bytes) !== 16) {
throw new InvalidArgumentException(
'The byte string must be 16 bytes long; '
. 'received ' . strlen($bytes) . ' bytes'
);
}
$this->bytes = $bytes;
if (!$this->isCorrectVariant()) {
throw new InvalidArgumentException(
'The byte string received does not conform to the RFC '
. '4122 or Microsoft Corporation variants'
);
}
if (!$this->isCorrectVersion()) {
throw new InvalidArgumentException(
'The byte string received does not contain a valid version'
);
}
}
public function getBytes(): string
{
return $this->bytes;
}
public function getTimeLow(): Hexadecimal
{
// Swap the bytes from little endian to network byte order.
/** @var array $hex */
$hex = unpack(
'H*',
pack(
'v*',
hexdec(bin2hex(substr($this->bytes, 2, 2))),
hexdec(bin2hex(substr($this->bytes, 0, 2)))
)
);
return new Hexadecimal((string) ($hex[1] ?? ''));
}
public function getTimeMid(): Hexadecimal
{
// Swap the bytes from little endian to network byte order.
/** @var array $hex */
$hex = unpack(
'H*',
pack(
'v',
hexdec(bin2hex(substr($this->bytes, 4, 2)))
)
);
return new Hexadecimal((string) ($hex[1] ?? ''));
}
public function getTimeHiAndVersion(): Hexadecimal
{
// Swap the bytes from little endian to network byte order.
/** @var array $hex */
$hex = unpack(
'H*',
pack(
'v',
hexdec(bin2hex(substr($this->bytes, 6, 2)))
)
);
return new Hexadecimal((string) ($hex[1] ?? ''));
}
public function getTimestamp(): Hexadecimal
{
return new Hexadecimal(sprintf(
'%03x%04s%08s',
hexdec($this->getTimeHiAndVersion()->toString()) & 0x0fff,
$this->getTimeMid()->toString(),
$this->getTimeLow()->toString()
));
}
public function getClockSeq(): Hexadecimal
{
$clockSeq = hexdec(bin2hex(substr($this->bytes, 8, 2))) & 0x3fff;
return new Hexadecimal(str_pad(dechex($clockSeq), 4, '0', STR_PAD_LEFT));
}
public function getClockSeqHiAndReserved(): Hexadecimal
{
return new Hexadecimal(bin2hex(substr($this->bytes, 8, 1)));
}
public function getClockSeqLow(): Hexadecimal
{
return new Hexadecimal(bin2hex(substr($this->bytes, 9, 1)));
}
public function getNode(): Hexadecimal
{
return new Hexadecimal(bin2hex(substr($this->bytes, 10)));
}
public function getVersion(): ?int
{
if ($this->isNil()) {
return null;
}
/** @var array $parts */
$parts = unpack('n*', $this->bytes);
return ((int) $parts[4] >> 4) & 0x00f;
}
private function isCorrectVariant(): bool
{
if ($this->isNil()) {
return true;
}
$variant = $this->getVariant();
return $variant === Uuid::RFC_4122 || $variant === Uuid::RESERVED_MICROSOFT;
}
}
|
