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