mirror of
https://github.com/coder/code-server.git
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Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'
This commit is contained in:
Joe Previte
236
lib/vscode/src/vs/base/common/buffer.ts
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236
lib/vscode/src/vs/base/common/buffer.ts
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import * as strings from 'vs/base/common/strings';
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import * as streams from 'vs/base/common/stream';
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declare const Buffer: any;
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const hasBuffer = (typeof Buffer !== 'undefined');
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const hasTextEncoder = (typeof TextEncoder !== 'undefined');
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const hasTextDecoder = (typeof TextDecoder !== 'undefined');
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let textEncoder: TextEncoder | null;
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let textDecoder: TextDecoder | null;
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export class VSBuffer {
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static alloc(byteLength: number): VSBuffer {
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if (hasBuffer) {
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return new VSBuffer(Buffer.allocUnsafe(byteLength));
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} else {
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return new VSBuffer(new Uint8Array(byteLength));
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}
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}
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static wrap(actual: Uint8Array): VSBuffer {
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if (hasBuffer && !(Buffer.isBuffer(actual))) {
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// https://nodejs.org/dist/latest-v10.x/docs/api/buffer.html#buffer_class_method_buffer_from_arraybuffer_byteoffset_length
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// Create a zero-copy Buffer wrapper around the ArrayBuffer pointed to by the Uint8Array
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actual = Buffer.from(actual.buffer, actual.byteOffset, actual.byteLength);
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}
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return new VSBuffer(actual);
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}
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static fromString(source: string): VSBuffer {
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if (hasBuffer) {
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return new VSBuffer(Buffer.from(source));
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} else if (hasTextEncoder) {
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if (!textEncoder) {
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textEncoder = new TextEncoder();
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}
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return new VSBuffer(textEncoder.encode(source));
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} else {
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return new VSBuffer(strings.encodeUTF8(source));
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}
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}
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static concat(buffers: VSBuffer[], totalLength?: number): VSBuffer {
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if (typeof totalLength === 'undefined') {
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totalLength = 0;
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for (let i = 0, len = buffers.length; i < len; i++) {
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totalLength += buffers[i].byteLength;
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}
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}
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const ret = VSBuffer.alloc(totalLength);
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let offset = 0;
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for (let i = 0, len = buffers.length; i < len; i++) {
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const element = buffers[i];
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ret.set(element, offset);
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offset += element.byteLength;
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}
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return ret;
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}
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readonly buffer: Uint8Array;
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readonly byteLength: number;
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private constructor(buffer: Uint8Array) {
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this.buffer = buffer;
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this.byteLength = this.buffer.byteLength;
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}
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toString(): string {
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if (hasBuffer) {
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return this.buffer.toString();
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} else if (hasTextDecoder) {
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if (!textDecoder) {
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textDecoder = new TextDecoder();
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}
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return textDecoder.decode(this.buffer);
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} else {
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return strings.decodeUTF8(this.buffer);
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}
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}
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slice(start?: number, end?: number): VSBuffer {
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// IMPORTANT: use subarray instead of slice because TypedArray#slice
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// creates shallow copy and NodeBuffer#slice doesn't. The use of subarray
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// ensures the same, performant, behaviour.
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return new VSBuffer(this.buffer.subarray(start!/*bad lib.d.ts*/, end));
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}
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set(array: VSBuffer, offset?: number): void;
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set(array: Uint8Array, offset?: number): void;
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set(array: VSBuffer | Uint8Array, offset?: number): void {
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if (array instanceof VSBuffer) {
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this.buffer.set(array.buffer, offset);
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} else {
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this.buffer.set(array, offset);
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}
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}
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readUInt32BE(offset: number): number {
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return readUInt32BE(this.buffer, offset);
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}
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writeUInt32BE(value: number, offset: number): void {
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writeUInt32BE(this.buffer, value, offset);
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}
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readUInt32LE(offset: number): number {
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return readUInt32LE(this.buffer, offset);
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}
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writeUInt32LE(value: number, offset: number): void {
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writeUInt32LE(this.buffer, value, offset);
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}
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readUInt8(offset: number): number {
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return readUInt8(this.buffer, offset);
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}
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writeUInt8(value: number, offset: number): void {
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writeUInt8(this.buffer, value, offset);
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}
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}
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export function readUInt16LE(source: Uint8Array, offset: number): number {
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return (
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((source[offset + 0] << 0) >>> 0) |
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((source[offset + 1] << 8) >>> 0)
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);
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}
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export function writeUInt16LE(destination: Uint8Array, value: number, offset: number): void {
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destination[offset + 0] = (value & 0b11111111);
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value = value >>> 8;
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destination[offset + 1] = (value & 0b11111111);
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}
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export function readUInt32BE(source: Uint8Array, offset: number): number {
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return (
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source[offset] * 2 ** 24
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+ source[offset + 1] * 2 ** 16
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+ source[offset + 2] * 2 ** 8
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+ source[offset + 3]
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);
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}
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export function writeUInt32BE(destination: Uint8Array, value: number, offset: number): void {
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destination[offset + 3] = value;
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value = value >>> 8;
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destination[offset + 2] = value;
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value = value >>> 8;
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destination[offset + 1] = value;
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value = value >>> 8;
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destination[offset] = value;
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}
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export function readUInt32LE(source: Uint8Array, offset: number): number {
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return (
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((source[offset + 0] << 0) >>> 0) |
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((source[offset + 1] << 8) >>> 0) |
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((source[offset + 2] << 16) >>> 0) |
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((source[offset + 3] << 24) >>> 0)
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);
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}
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export function writeUInt32LE(destination: Uint8Array, value: number, offset: number): void {
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destination[offset + 0] = (value & 0b11111111);
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value = value >>> 8;
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destination[offset + 1] = (value & 0b11111111);
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value = value >>> 8;
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destination[offset + 2] = (value & 0b11111111);
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value = value >>> 8;
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destination[offset + 3] = (value & 0b11111111);
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}
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export function readUInt8(source: Uint8Array, offset: number): number {
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return source[offset];
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}
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export function writeUInt8(destination: Uint8Array, value: number, offset: number): void {
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destination[offset] = value;
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}
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export interface VSBufferReadable extends streams.Readable<VSBuffer> { }
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export interface VSBufferReadableStream extends streams.ReadableStream<VSBuffer> { }
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export interface VSBufferWriteableStream extends streams.WriteableStream<VSBuffer> { }
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export interface VSBufferReadableBufferedStream extends streams.ReadableBufferedStream<VSBuffer> { }
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export function readableToBuffer(readable: VSBufferReadable): VSBuffer {
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return streams.consumeReadable<VSBuffer>(readable, chunks => VSBuffer.concat(chunks));
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}
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export function bufferToReadable(buffer: VSBuffer): VSBufferReadable {
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return streams.toReadable<VSBuffer>(buffer);
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}
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export function streamToBuffer(stream: streams.ReadableStream<VSBuffer>): Promise<VSBuffer> {
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return streams.consumeStream<VSBuffer>(stream, chunks => VSBuffer.concat(chunks));
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}
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export async function bufferedStreamToBuffer(bufferedStream: streams.ReadableBufferedStream<VSBuffer>): Promise<VSBuffer> {
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if (bufferedStream.ended) {
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return VSBuffer.concat(bufferedStream.buffer);
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}
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return VSBuffer.concat([
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// Include already read chunks...
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...bufferedStream.buffer,
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// ...and all additional chunks
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await streamToBuffer(bufferedStream.stream)
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]);
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}
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export function bufferToStream(buffer: VSBuffer): streams.ReadableStream<VSBuffer> {
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return streams.toStream<VSBuffer>(buffer, chunks => VSBuffer.concat(chunks));
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}
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export function streamToBufferReadableStream(stream: streams.ReadableStreamEvents<Uint8Array | string>): streams.ReadableStream<VSBuffer> {
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return streams.transform<Uint8Array | string, VSBuffer>(stream, { data: data => typeof data === 'string' ? VSBuffer.fromString(data) : VSBuffer.wrap(data) }, chunks => VSBuffer.concat(chunks));
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}
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export function newWriteableBufferStream(options?: streams.WriteableStreamOptions): streams.WriteableStream<VSBuffer> {
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return streams.newWriteableStream<VSBuffer>(chunks => VSBuffer.concat(chunks), options);
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}
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