@sussudio/base
Version:
Internal APIs for VS Code's utilities and user interface building blocks.
64 lines (63 loc) • 2.03 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
const _UUIDPattern = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
export function isUUID(value) {
return _UUIDPattern.test(value);
}
export const generateUuid = (function () {
// use `randomUUID` if possible
if (typeof crypto === 'object' && typeof crypto.randomUUID === 'function') {
return crypto.randomUUID.bind(crypto);
}
// use `randomValues` if possible
let getRandomValues;
if (typeof crypto === 'object' && typeof crypto.getRandomValues === 'function') {
getRandomValues = crypto.getRandomValues.bind(crypto);
} else {
getRandomValues = function (bucket) {
for (let i = 0; i < bucket.length; i++) {
bucket[i] = Math.floor(Math.random() * 256);
}
return bucket;
};
}
// prep-work
const _data = new Uint8Array(16);
const _hex = [];
for (let i = 0; i < 256; i++) {
_hex.push(i.toString(16).padStart(2, '0'));
}
return function generateUuid() {
// get data
getRandomValues(_data);
// set version bits
_data[6] = (_data[6] & 0x0f) | 0x40;
_data[8] = (_data[8] & 0x3f) | 0x80;
// print as string
let i = 0;
let result = '';
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += '-';
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += '-';
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += '-';
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += '-';
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += _hex[_data[i++]];
result += _hex[_data[i++]];
return result;
};
})();