diff options
Diffstat (limited to 'apps/files/src/utils/hashUtils.ts')
| -rw-r--r-- | apps/files/src/utils/hashUtils.ts | 35 |
1 files changed, 12 insertions, 23 deletions
diff --git a/apps/files/src/utils/hashUtils.ts b/apps/files/src/utils/hashUtils.ts index 55cf8b9f51a..2e1fadff067 100644 --- a/apps/files/src/utils/hashUtils.ts +++ b/apps/files/src/utils/hashUtils.ts @@ -1,28 +1,17 @@ /** - * @copyright Copyright (c) 2023 John Molakvoæ <skjnldsv@protonmail.com> - * - * @author John Molakvoæ <skjnldsv@protonmail.com> - * - * @license AGPL-3.0-or-later - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as - * published by the Free Software Foundation, either version 3 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * + * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors + * SPDX-License-Identifier: AGPL-3.0-or-later */ +/** + * Simple non-secure hashing function similar to Java's `hashCode` + * @param str The string to hash + * @return {number} a non secure hash of the string + */ export const hashCode = function(str: string): number { - return str.split('').reduce(function(a, b) { - a = ((a << 5) - a) + b.charCodeAt(0) - return a & a - }, 0) + let hash = 0 + for (let i = 0; i < str.length; i++) { + hash = ((hash << 5) - hash + str.charCodeAt(i)) | 0 + } + return (hash >>> 0) } |