| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | /** |
| 2 | * Convert array of 16 byte values to UUID string format of the form: |
| 3 | * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX |
| 4 | */ |
| 5 | var byteToHex = []; |
| 6 | for (var i = 0; i < 256; ++i) { |
| 7 | byteToHex[i] = (i + 0x100).toString(16).substr(1); |
| 8 | } |
| 9 | |
| 10 | function bytesToUuid(buf, offset) { |
| 11 | var i = offset || 0; |
| 12 | var bth = byteToHex; |
| 13 | // join used to fix memory issue caused by concatenation: https://bugs.chromium.org/p/v8/issues/detail?id=3175#c4 |
| 14 | return ([ |
| 15 | bth[buf[i++]], bth[buf[i++]], |
| 16 | bth[buf[i++]], bth[buf[i++]], '-', |
| 17 | bth[buf[i++]], bth[buf[i++]], '-', |
| 18 | bth[buf[i++]], bth[buf[i++]], '-', |
| 19 | bth[buf[i++]], bth[buf[i++]], '-', |
| 20 | bth[buf[i++]], bth[buf[i++]], |
| 21 | bth[buf[i++]], bth[buf[i++]], |
| 22 | bth[buf[i++]], bth[buf[i++]] |
| 23 | ]).join(''); |
| 24 | } |
| 25 | |
| 26 | module.exports = bytesToUuid; |