mirror of
https://github.com/react/react-native-devtools-frontend.git
synced 2026-10-10 05:35:05 +08:00
Sigurd Schneider
db13439afe
This makes it possible to use the IO domain to retrieve data from stream handles of the IO domain. Corresponding back-end CL: https://crrev.com/c/2421369 Bug: chromium:1069378 Change-Id: I1c6633c43ea35da5b4a2302f1356ba3e565f3683 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2422959 Reviewed-by: Philip Pfaffe <pfaffe@chromium.org> Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org> Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
// Copyright 2020 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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const BASE64_CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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const BASE64_CODES = new Uint8Array(123);
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for (let index = 0; index < BASE64_CHARS.length; ++index) {
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BASE64_CODES[BASE64_CHARS.charCodeAt(index)] = index;
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}
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/**
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* Decodes Base64-encoded data from a string without performing any kind of checking.
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*
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* @param {string} input valid Base64-encoded data
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* @return {!ArrayBuffer} decoded result
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*/
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export function decode(input) {
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let bytesLength = ((input.length * 3) / 4) >>> 0;
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if (input.charCodeAt(input.length - 2) === 0x3d /* '=' */) {
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bytesLength -= 2;
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} else if (input.charCodeAt(input.length - 1) === 0x3d /* '=' */) {
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bytesLength -= 1;
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}
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const bytes = new Uint8Array(bytesLength);
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for (let index = 0, offset = 0; index < input.length; index += 4) {
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const a = BASE64_CODES[input.charCodeAt(index + 0)];
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const b = BASE64_CODES[input.charCodeAt(index + 1)];
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const c = BASE64_CODES[input.charCodeAt(index + 2)];
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const d = BASE64_CODES[input.charCodeAt(index + 3)];
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bytes[offset++] = (a << 2) | (b >> 4);
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bytes[offset++] = ((b & 0x0f) << 4) | (c >> 2);
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bytes[offset++] = ((c & 0x03) << 6) | (d & 0x3f);
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}
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return bytes.buffer;
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}
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