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24 lines
546 B
24 lines
546 B
import rng from './rng.js'; |
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import stringify from './stringify.js'; |
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function v4(options, buf, offset) { |
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options = options || {}; |
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const rnds = options.random || (options.rng || rng)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved` |
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rnds[6] = rnds[6] & 0x0f | 0x40; |
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rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided |
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if (buf) { |
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offset = offset || 0; |
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for (let i = 0; i < 16; ++i) { |
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buf[offset + i] = rnds[i]; |
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} |
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return buf; |
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} |
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return stringify(rnds); |
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} |
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export default v4; |