1 | import rng from './rng.js';
|
2 | import bytesToUuid from './bytesToUuid.js';
|
3 |
|
4 |
|
5 |
|
6 |
|
7 | var _nodeId;
|
8 |
|
9 | var _clockseq;
|
10 |
|
11 |
|
12 | var _lastMSecs = 0;
|
13 | var _lastNSecs = 0;
|
14 |
|
15 | function v1(options, buf, offset) {
|
16 | var i = buf && offset || 0;
|
17 | var b = buf || [];
|
18 | options = options || {};
|
19 | var node = options.node || _nodeId;
|
20 | var clockseq = options.clockseq !== undefined ? options.clockseq : _clockseq;
|
21 |
|
22 |
|
23 |
|
24 | if (node == null || clockseq == null) {
|
25 | var seedBytes = options.random || (options.rng || rng)();
|
26 |
|
27 | if (node == null) {
|
28 |
|
29 | node = _nodeId = [seedBytes[0] | 0x01, seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
|
30 | }
|
31 |
|
32 | if (clockseq == null) {
|
33 |
|
34 | clockseq = _clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
|
35 | }
|
36 | }
|
37 |
|
38 |
|
39 |
|
40 |
|
41 |
|
42 | var msecs = options.msecs !== undefined ? options.msecs : new Date().getTime();
|
43 |
|
44 |
|
45 | var nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;
|
46 |
|
47 | var dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000;
|
48 |
|
49 | if (dt < 0 && options.clockseq === undefined) {
|
50 | clockseq = clockseq + 1 & 0x3fff;
|
51 | }
|
52 |
|
53 |
|
54 |
|
55 | if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
|
56 | nsecs = 0;
|
57 | }
|
58 |
|
59 |
|
60 | if (nsecs >= 10000) {
|
61 | throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
|
62 | }
|
63 |
|
64 | _lastMSecs = msecs;
|
65 | _lastNSecs = nsecs;
|
66 | _clockseq = clockseq;
|
67 |
|
68 | msecs += 12219292800000;
|
69 |
|
70 | var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
|
71 | b[i++] = tl >>> 24 & 0xff;
|
72 | b[i++] = tl >>> 16 & 0xff;
|
73 | b[i++] = tl >>> 8 & 0xff;
|
74 | b[i++] = tl & 0xff;
|
75 |
|
76 | var tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
|
77 | b[i++] = tmh >>> 8 & 0xff;
|
78 | b[i++] = tmh & 0xff;
|
79 |
|
80 | b[i++] = tmh >>> 24 & 0xf | 0x10;
|
81 |
|
82 | b[i++] = tmh >>> 16 & 0xff;
|
83 |
|
84 | b[i++] = clockseq >>> 8 | 0x80;
|
85 |
|
86 | b[i++] = clockseq & 0xff;
|
87 |
|
88 | for (var n = 0; n < 6; ++n) {
|
89 | b[i + n] = node[n];
|
90 | }
|
91 |
|
92 | return buf ? buf : bytesToUuid(b);
|
93 | }
|
94 |
|
95 | export default v1; |
\ | No newline at end of file |