Software zum Installieren eines Smart-Mirror Frameworks , zum Nutzen von hochschulrelevanten Informationen, auf einem Raspberry-Pi.
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stringify.js 1.4KB

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  1. import validate from './validate.js';
  2. /**
  3. * Convert array of 16 byte values to UUID string format of the form:
  4. * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
  5. */
  6. const byteToHex = [];
  7. for (let i = 0; i < 256; ++i) {
  8. byteToHex.push((i + 0x100).toString(16).substr(1));
  9. }
  10. function stringify(arr, offset = 0) {
  11. // Note: Be careful editing this code! It's been tuned for performance
  12. // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
  13. const uuid = (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase(); // Consistency check for valid UUID. If this throws, it's likely due to one
  14. // of the following:
  15. // - One or more input array values don't map to a hex octet (leading to
  16. // "undefined" in the uuid)
  17. // - Invalid input values for the RFC `version` or `variant` fields
  18. if (!validate(uuid)) {
  19. throw TypeError('Stringified UUID is invalid');
  20. }
  21. return uuid;
  22. }
  23. export default stringify;