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Last change
on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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initial commit
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File size:
544 bytes
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| 1 | import rng from './rng.js';
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| 2 | import stringify from './stringify.js';
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| 3 |
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| 4 | function v4(options, buf, offset) {
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| 5 | options = options || {};
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| 6 | var rnds = options.random || (options.rng || rng)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
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| 7 |
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| 8 | rnds[6] = rnds[6] & 0x0f | 0x40;
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| 9 | rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided
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| 10 |
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| 11 | if (buf) {
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| 12 | offset = offset || 0;
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| 13 |
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| 14 | for (var i = 0; i < 16; ++i) {
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| 15 | buf[offset + i] = rnds[i];
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| 16 | }
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| 17 |
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| 18 | return buf;
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| 19 | }
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| 20 |
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| 21 | return stringify(rnds);
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| 22 | }
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| 23 |
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| 24 | export default v4; |
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