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Fix TextDecoder for SharedArrayBuffer backed TypedArray (#1940)

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Ryan Dahl 2019-03-15 16:29:54 -04:00 • committed by GitHub
parent b2f15cf21a
commit bb642e8c7c
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2 changed files with 37 additions and 2 deletions
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13
js/text_encoding.ts
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@ -356,6 +356,13 @@ export interface TextDecoderOptions {
ignoreBOM?: false;
}
type EitherArrayBuffer = SharedArrayBuffer | ArrayBuffer;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function isEitherArrayBuffer(x: any): x is EitherArrayBuffer {
return x instanceof SharedArrayBuffer || x instanceof ArrayBuffer;
}
export class TextDecoder {
private _encoding: string;
@ -400,12 +407,14 @@ export class TextDecoder {
}
let bytes: Uint8Array;
if (typeof input === "object" && input instanceof ArrayBuffer) {
if (input instanceof Uint8Array) {
bytes = input;
} else if (isEitherArrayBuffer(input)) {
bytes = new Uint8Array(input);
} else if (
typeof input === "object" &&
"buffer" in input &&
input.buffer instanceof ArrayBuffer
isEitherArrayBuffer(input.buffer)
) {
bytes = new Uint8Array(input.buffer, input.byteOffset, input.byteLength);
} else {