| // Copyright 2024 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| const WINDOWS_EPOCH = Date.UTC(1601, 0, 1, 0, 0, 0, 0); |
| const UNIX_EPOCH = Date.UTC(1970, 0, 1, 0, 0, 0, 0); |
| |
| |
| /** |
| * Converts a JavaScript Date() object to a string that represents microseconds |
| * since the Windows FILETIME epoch. |
| * |
| * The JS Date() is based off of the number of milliseconds since the UNIX epoch |
| * (1970-01-01 00::00:00 UTC), while times stored within prefs are represented |
| * as the number of microseconds since the Windows FILETIME epoch |
| * (1601-01-01 00:00:00 UTC). |
| */ |
| export function convertDateToWindowsEpoch(date = Date.now()) { |
| const epochDeltaMs = UNIX_EPOCH - WINDOWS_EPOCH; |
| return `${(date + epochDeltaMs) * 1000}`; |
| } |
