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