refactor(adb): further split sync module

packages/adb/src/adb.ts

@@ -2,12 +2,10 @@ import { PromiseResolver } from '@yume-chan/async-operation-manager';
 import { DisposableList } from '@yume-chan/event';
 import { AdbAuthenticationHandler, AdbDefaultAuthenticators } from './auth';
 import { AdbBackend } from './backend';
-import { AdbReverseCommand, AdbTcpIpCommand } from './commands';
+import { AdbFrameBuffer, AdbReverseCommand, AdbSync, AdbTcpIpCommand } from './commands';
 import { AdbFeatures } from './features';
-import { FrameBuffer } from './framebuffer';
 import { AdbCommand } from './packet';
 import { AdbBufferedStream, AdbPacketDispatcher, AdbReadableStream, AdbStream } from './stream';
-import { AdbSync } from './sync';
 
 export enum AdbPropKey {
     Product = 'ro.product.name',
@@ -175,15 +173,20 @@ export class Adb {
         }
     }
 
-    public async sync(): Promise<AdbSync> {
-        const stream = await this.createStream('sync:');
-        return new AdbSync(stream, this);
+    public async getProp(key: string): Promise<string> {
+        const output = await this.shell('getprop', key);
+        return output.trim();
     }
 
-    public async framebuffer(): Promise<FrameBuffer> {
+    public async sync(): Promise<AdbSync> {
+        const stream = await this.createStream('sync:');
+        return new AdbSync(this, stream);
+    }
+
+    public async framebuffer(): Promise<AdbFrameBuffer> {
         const stream = await this.createStream('framebuffer:');
         const buffered = new AdbBufferedStream(stream);
-        return FrameBuffer.deserialize(buffered);
+        return AdbFrameBuffer.deserialize(buffered);
     }
 
     public async createStream(service: string): Promise<AdbStream> {

packages/adb/src/commands/framebuffer.ts

@@ -1,6 +1,6 @@
 import { Struct, StructValueType } from "@yume-chan/struct";
 
-export const FrameBuffer =
+export const AdbFrameBuffer =
     new Struct({ littleEndian: true })
         .uint32('version', undefined, 2 as const)
         .uint32('bpp')
@@ -18,4 +18,4 @@ export const FrameBuffer =
         .uint32('alpha_length')
         .arrayBuffer('data', { lengthField: 'size' });
 
-export type FrameBuffer = StructValueType<typeof FrameBuffer>;
+export type AdbFrameBuffer = StructValueType<typeof AdbFrameBuffer>;

packages/adb/src/commands/index.ts

@@ -1,3 +1,5 @@
 export * from './base';
-export * from './tcpip';
+export * from './framebuffer';
 export * from './reverse';
+export * from './sync';
+export * from './tcpip';

packages/adb/src/commands/reverse.ts

@@ -1,9 +1,7 @@
 import { AutoDisposable } from '@yume-chan/event';
 import { Struct } from '@yume-chan/struct';
-import { Adb } from '../adb';
 import { AdbPacket } from '../packet';
-import { AdbBufferedStream, AdbPacketDispatcher, AdbStream } from '../stream';
-import { AdbCommandBase } from './base';
+import { AdbBufferedStream, AdbIncomingStreamEventArgs, AdbPacketDispatcher, AdbStream } from '../stream';
 
 export interface AdbReverseHandler {
     onStream(packet: AdbPacket, stream: AdbStream): void;
@@ -29,29 +27,32 @@ const AdbReverseErrorResponse =
         });
 
 export class AdbReverseCommand extends AutoDisposable {
-    private portToHandlerMap = new Map<number, AdbReverseHandler>();
+    protected portToHandlerMap = new Map<number, AdbReverseHandler>();
 
-    private devicePortToPortMap = new Map<number, number>();
+    protected devicePortToPortMap = new Map<number, number>();
 
-    private dispatcher: AdbPacketDispatcher;
+    protected dispatcher: AdbPacketDispatcher;
 
-    private listening = false;
+    protected listening = false;
 
     public constructor(dispatcher: AdbPacketDispatcher) {
         super();
+
         this.dispatcher = dispatcher;
+        this.addDisposable(this.dispatcher.onStream(this.handleStream, this));
     }
 
-    public async list(): Promise<AdbForwardListener[]> {
-        const stream = await this.dispatcher.createStream('reverse:list-forward');
-        const buffered = new AdbBufferedStream(stream);
+    protected handleStream(e: AdbIncomingStreamEventArgs): void {
+        if (e.handled) {
+            return;
+        }
 
-        const response = await AdbReverseStringResponse.deserialize(buffered);
-
-        return response.content!.split('\n').map(line => {
-            const [deviceSerial, localName, remoteName] = line.split(' ');
-            return { deviceSerial, localName, remoteName };
-        });
+        const address = this.dispatcher.backend.decodeUtf8(e.packet.payload!);
+        const port = Number.parseInt(address.substring(4));
+        if (this.portToHandlerMap.has(port)) {
+            this.portToHandlerMap.get(port)!.onStream(e.packet, e.stream);
+            e.handled = true;
+        }
     }
 
     public async add(
@@ -59,21 +60,6 @@ export class AdbReverseCommand extends AutoDisposable {
         handler: AdbReverseHandler,
         devicePort: number = 0,
     ): Promise<number> {
-        if (!this.listening) {
-            this.addDisposable(this.dispatcher.onStream(e => {
-                if (e.handled) {
-                    return;
-                }
-
-                const address = this.dispatcher.backend.decodeUtf8(e.packet.payload!);
-                const port = Number.parseInt(address.substring(4));
-                if (this.portToHandlerMap.has(port)) {
-                    this.portToHandlerMap.get(port)!.onStream(e.packet, e.stream);
-                    e.handled = true;
-                }
-            }));
-        }
-
         const stream = await this.dispatcher.createStream(`reverse:forward:tcp:${devicePort};tcp:${port}`);
         const buffered = new AdbBufferedStream(stream);
 
@@ -92,6 +78,18 @@ export class AdbReverseCommand extends AutoDisposable {
         }
     }
 
+    public async list(): Promise<AdbForwardListener[]> {
+        const stream = await this.dispatcher.createStream('reverse:list-forward');
+        const buffered = new AdbBufferedStream(stream);
+
+        const response = await AdbReverseStringResponse.deserialize(buffered);
+
+        return response.content!.split('\n').map(line => {
+            const [deviceSerial, localName, remoteName] = line.split(' ');
+            return { deviceSerial, localName, remoteName };
+        });
+    }
+
     public async remove(devicePort: number): Promise<void> {
         const stream = await this.dispatcher.createStream(`reverse:killforward:tcp:${devicePort}`);
         const buffered = new AdbBufferedStream(stream);

packages/adb/src/commands/sync/index.ts

@@ -1,2 +1,7 @@
-export * from './sync';
 export * from './list';
+export * from './receive';
+export * from './request';
+export * from './response';
+export * from './send';
+export * from './stat';
+export * from './sync';

packages/adb/src/commands/sync/list.ts

@@ -0,0 +1,39 @@
+import { StructValueType } from '@yume-chan/struct';
+import { AdbBufferedStream } from '../../stream';
+import { AdbSyncRequestId, adbSyncWriteRequest } from './request';
+import { AdbSyncDoneResponse, adbSyncReadResponse, AdbSyncResponseId } from './response';
+import { AdbSyncLstatResponse } from './stat';
+
+export const AdbSyncEntryResponse =
+    AdbSyncLstatResponse
+        .afterParsed()
+        .uint32('nameLength')
+        .string('name', { lengthField: 'nameLength' })
+        .extra({ id: AdbSyncResponseId.Entry as const });
+
+export type AdbSyncEntryResponse = StructValueType<typeof AdbSyncEntryResponse>;
+
+const ResponseTypes = {
+    [AdbSyncResponseId.Entry]: AdbSyncEntryResponse,
+    [AdbSyncResponseId.Done]: new AdbSyncDoneResponse(AdbSyncEntryResponse.size),
+};
+
+export async function* adbSyncOpenDir(
+    stream: AdbBufferedStream,
+    path: string
+): AsyncGenerator<AdbSyncEntryResponse, void, void> {
+    await adbSyncWriteRequest(stream, AdbSyncRequestId.List, path);
+
+    while (true) {
+        const response = await adbSyncReadResponse(stream, ResponseTypes);
+        switch (response.id) {
+            case AdbSyncResponseId.Entry:
+                yield response;
+                break;
+            case AdbSyncResponseId.Done:
+                return;
+            default:
+                throw new Error('Unexpected response id');
+        }
+    }
+}

packages/adb/src/commands/sync/receive.ts

@@ -0,0 +1,34 @@
+import { Struct } from '@yume-chan/struct';
+import { AdbBufferedStream } from '../../stream';
+import { AdbSyncRequestId, adbSyncWriteRequest } from './request';
+import { AdbSyncDoneResponse, adbSyncReadResponse, AdbSyncResponseId } from './response';
+
+export const AdbSyncDataResponse =
+    new Struct({ littleEndian: true })
+        .uint32('dataLength')
+        .arrayBuffer('data', { lengthField: 'dataLength' })
+        .extra({ id: AdbSyncResponseId.Data as const });
+
+const ResponseTypes = {
+    [AdbSyncResponseId.Data]: AdbSyncDataResponse,
+    [AdbSyncResponseId.Done]: new AdbSyncDoneResponse(AdbSyncDataResponse.size),
+};
+
+export async function* adbSyncPull(
+    stream: AdbBufferedStream,
+    path: string,
+): AsyncGenerator<ArrayBuffer, void, void> {
+    await adbSyncWriteRequest(stream, AdbSyncRequestId.Receive, path);
+    while (true) {
+        const response = await adbSyncReadResponse(stream, ResponseTypes);
+        switch (response.id) {
+            case AdbSyncResponseId.Data:
+                yield response.data!;
+                break;
+            case AdbSyncResponseId.Done:
+                return;
+            default:
+                throw new Error('Unexpected response id');
+        }
+    }
+}

packages/adb/src/commands/sync/request.ts

@@ -0,0 +1,47 @@
+import { Struct } from '@yume-chan/struct';
+import { AdbBufferedStream } from '../../stream';
+
+export enum AdbSyncRequestId {
+    List = 'LIST',
+    Send = 'SEND',
+    Lstat = 'STAT',
+    Stat = 'STA2',
+    Lstat2 = 'LST2',
+    Data = 'DATA',
+    Done = 'DONE',
+    Receive = 'RECV',
+}
+
+export const AdbSyncNumberRequest =
+    new Struct({ littleEndian: true })
+        .string('id', { length: 4 })
+        .uint32('arg');
+
+export const AdbSyncDataRequest =
+    AdbSyncNumberRequest
+        .arrayBuffer('data', { lengthField: 'arg' });
+
+export async function adbSyncWriteRequest(
+    stream: AdbBufferedStream,
+    id: AdbSyncRequestId | string,
+    value: number | string | ArrayBuffer
+): Promise<void> {
+    let buffer: ArrayBuffer;
+    if (typeof value === 'number') {
+        buffer = AdbSyncNumberRequest.serialize({
+            id,
+            arg: value,
+        }, stream);
+    } else if (typeof value === 'string') {
+        buffer = AdbSyncDataRequest.serialize({
+            id,
+            data: stream.encodeUtf8(value),
+        }, stream);
+    } else {
+        buffer = AdbSyncDataRequest.serialize({
+            id,
+            data: value,
+        }, stream);
+    }
+    await stream.write(buffer);
+}

packages/adb/src/commands/sync/response.ts

@@ -0,0 +1,57 @@
+import { Struct, StructDeserializationContext, StructValueType } from '@yume-chan/struct';
+import { AdbBufferedStream } from '../../stream';
+
+export enum AdbSyncResponseId {
+    Entry = 'DENT',
+    Lstat = 'STAT',
+    Stat = 'STA2',
+    Lstat2 = 'LST2',
+    Done = 'DONE',
+    Data = 'DATA',
+    Ok = 'OKAY',
+    Fail = 'FAIL',
+}
+
+// DONE responses' size are always same as the request's normal response.
+// For example DONE responses for LIST requests are 16 bytes (same as DENT responses),
+// but DONE responses for STAT requests are 12 bytes (same as STAT responses)
+// So we need to know responses' size in advance.
+export class AdbSyncDoneResponse {
+    private length: number;
+
+    public readonly id = AdbSyncResponseId.Done;
+
+    public constructor(length: number) {
+        this.length = length;
+    }
+
+    public async deserialize(context: StructDeserializationContext): Promise<this> {
+        await context.read(this.length);
+        return this;
+    }
+}
+
+export const AdbSyncFailResponse =
+    new Struct({ littleEndian: true })
+        .uint32('messageLength')
+        .string('message', { lengthField: 'messageLength' })
+        .afterParsed(object => {
+            throw new Error(object.message);
+        });
+
+export async function adbSyncReadResponse<T extends Record<string, { deserialize(context: StructDeserializationContext): Promise<any>; }>>(
+    stream: AdbBufferedStream,
+    types: T,
+): Promise<StructValueType<T[keyof T]>> {
+    const id = stream.backend.decodeUtf8(await stream.read(4));
+
+    if (id === AdbSyncResponseId.Fail) {
+        await AdbSyncFailResponse.deserialize(stream);
+    }
+
+    if (types[id]) {
+        return types[id].deserialize(stream);
+    }
+
+    throw new Error('Unexpected response id');
+}

packages/adb/src/commands/sync/send.ts

@@ -0,0 +1,107 @@
+import { Struct } from '@yume-chan/struct';
+import { AdbBufferedStream } from '../../stream';
+import { AdbSyncRequestId, adbSyncWriteRequest } from './request';
+import { adbSyncReadResponse, AdbSyncResponseId } from './response';
+import { LinuxFileType } from './stat';
+
+export const AdbSyncOkResponse =
+    new Struct({ littleEndian: true })
+        .uint32('unused');
+
+const ResponseTypes = {
+    [AdbSyncResponseId.Ok]: AdbSyncOkResponse,
+};
+
+export function* chunkArrayLike(
+    value: ArrayLike<number> | ArrayBufferLike,
+    size: number
+): Generator<ArrayBuffer, void, void> {
+    if ('length' in value) {
+        value = new Uint8Array(value).buffer;
+    }
+
+    if (value.byteLength <= size) {
+        return yield value;
+    }
+
+    for (let i = 0; i < value.byteLength; i += size) {
+        yield value.slice(i, i + size);
+    }
+}
+
+export async function* chunkAsyncIterable(
+    value: AsyncIterable<ArrayBuffer>,
+    size: number
+): AsyncGenerator<ArrayBuffer, void, void> {
+    let result = new Uint8Array(size);
+    let index = 0;
+    for await (let buffer of value) {
+        // `result` has some data, `result + buffer` is enough
+        if (index !== 0 && index + buffer.byteLength >= size) {
+            const remainder = size - index;
+            result.set(new Uint8Array(buffer, 0, remainder), index);
+            yield result.buffer;
+
+            result = new Uint8Array(size);
+            index = 0;
+
+            if (buffer.byteLength > remainder) {
+                // `buffer` still has some data
+                buffer = buffer.slice(remainder);
+            } else {
+                continue;
+            }
+        }
+
+        // `result` is empty, `buffer` alone is enough
+        if (buffer.byteLength >= size) {
+            let remainder = false;
+            for (const chunk of chunkArrayLike(buffer, size)) {
+                if (chunk.byteLength === size) {
+                    yield chunk;
+                }
+
+                // `buffer` still has some data
+                remainder = true;
+                buffer = chunk;
+            }
+
+            if (!remainder) {
+                continue;
+            }
+        }
+
+        // `result` has some data but `result + buffer` is still not enough
+        // or after previous steps `buffer` still has some data
+        result.set(new Uint8Array(buffer), index);
+        index += buffer.byteLength;
+    }
+}
+
+export const AdbSyncSendPacketSize = 64 * 1024;
+
+export async function adbSyncPush(
+    stream: AdbBufferedStream,
+    path: string,
+    file: ArrayLike<number> | ArrayBufferLike | AsyncIterable<ArrayBuffer>,
+    mode: number = LinuxFileType.File | 0o777,
+    mtime: number = (Date.now() / 1000) | 0,
+    packetSize: number = AdbSyncSendPacketSize,
+): Promise<void> {
+    const pathAndMode = `${path},${mode.toString(8)}`;
+    await adbSyncWriteRequest(stream, AdbSyncRequestId.Send, pathAndMode);
+
+    let chunkReader: Iterable<ArrayBuffer> | AsyncIterable<ArrayBuffer>;
+    if ('length' in file || 'byteLength' in file) {
+        chunkReader = chunkArrayLike(file, packetSize);
+    } else {
+        chunkReader = chunkAsyncIterable(file, packetSize);
+    }
+
+    for await (const buffer of chunkReader) {
+        await adbSyncWriteRequest(stream, AdbSyncRequestId.Data, buffer);
+    }
+
+    await adbSyncWriteRequest(stream, AdbSyncRequestId.Send, mtime);
+    await adbSyncReadResponse(stream, ResponseTypes);
+}

packages/adb/src/commands/sync/stat.ts

@@ -0,0 +1,121 @@
+import { placeholder, Struct, StructValueType } from '@yume-chan/struct';
+import { AdbBufferedStream } from '../../stream';
+import { AdbSyncRequestId, adbSyncWriteRequest } from './request';
+import { adbSyncReadResponse, AdbSyncResponseId } from './response';
+
+// https://github.com/python/cpython/blob/4e581d64b8aff3e2eda99b12f080c877bb78dfca/Lib/stat.py#L36
+export enum LinuxFileType {
+    Directory = 0o04,
+    File = 0o10,
+    Link = 0o12,
+}
+
+export const AdbSyncLstatResponse =
+    new Struct({ littleEndian: true })
+        .int32('mode')
+        .int32('size')
+        .int32('mtime')
+        .extra({
+            id: AdbSyncResponseId.Lstat as const,
+            get type() { return this.mode >> 12 as LinuxFileType; },
+            get permission() { return this.mode & 0b00001111_11111111; },
+        })
+        .afterParsed((object) => {
+            if (object.mode === 0 &&
+                object.size === 0 &&
+                object.mtime === 0
+            ) {
+                throw new Error('lstat failed');
+            }
+        });
+
+export type AdbSyncLstatResponse = StructValueType<typeof AdbSyncLstatResponse>;
+
+export enum AdbSyncStatErrorCode {
+    EACCES = 13,
+    EEXIST = 17,
+    EFAULT = 14,
+    EFBIG = 27,
+    EINTR = 4,
+    EINVAL = 22,
+    EIO = 5,
+    EISDIR = 21,
+    ELOOP = 40,
+    EMFILE = 24,
+    ENAMETOOLONG = 36,
+    ENFILE = 23,
+    ENOENT = 2,
+    ENOMEM = 12,
+    ENOSPC = 28,
+    ENOTDIR = 20,
+    EOVERFLOW = 75,
+    EPERM = 1,
+    EROFS = 30,
+    ETXTBSY = 26,
+}
+
+export const AdbSyncStatResponse =
+    new Struct({ littleEndian: true })
+        .uint32('error', undefined, placeholder<AdbSyncStatErrorCode>())
+        .uint64('dev')
+        .uint64('ino')
+        .uint32('mode')
+        .uint32('nlink')
+        .uint32('uid')
+        .uint32('gid')
+        .uint64('size')
+        .uint64('atime')
+        .uint64('mtime')
+        .uint64('ctime')
+        .extra({
+            id: AdbSyncResponseId.Stat as const,
+            get type() { return this.mode >> 12 as LinuxFileType; },
+            get permission() { return this.mode & 0b00001111_11111111; },
+        })
+        .afterParsed((object) => {
+            if (object.error) {
+                throw new Error(AdbSyncStatErrorCode[object.error]);
+            }
+        });
+
+export type AdbSyncStatResponse = StructValueType<typeof AdbSyncStatResponse>;
+
+const StatResponseType = {
+    [AdbSyncResponseId.Stat]: AdbSyncStatResponse,
+};
+
+const LstatResponseType = {
+    [AdbSyncResponseId.Lstat]: AdbSyncLstatResponse,
+};
+
+const Lstat2ResponseType = {
+    [AdbSyncResponseId.Lstat2]: AdbSyncStatResponse,
+};
+
+export async function adbSyncLstat(
+    stream: AdbBufferedStream,
+    path: string,
+    v2: boolean,
+): Promise<AdbSyncLstatResponse | AdbSyncStatResponse> {
+    let requestId: AdbSyncRequestId.Lstat | AdbSyncRequestId.Lstat2;
+    let responseType: typeof LstatResponseType | typeof Lstat2ResponseType;
+
+    if (v2) {
+        requestId = AdbSyncRequestId.Lstat2;
+        responseType = Lstat2ResponseType;
+    } else {
+        requestId = AdbSyncRequestId.Lstat;
+        responseType = LstatResponseType;
+    }
+
+    await adbSyncWriteRequest(stream, requestId, path);
+    return adbSyncReadResponse(stream, responseType);
+}
+
+export async function adbSyncStat(
+    stream: AdbBufferedStream,
+    path: string,
+): Promise<AdbSyncStatResponse> {
+    await adbSyncWriteRequest(stream, AdbSyncRequestId.Stat, path);
+    return adbSyncReadResponse(stream, StatResponseType);
+}

packages/adb/src/commands/sync/sync.ts

@@ -1,260 +1,12 @@
 import { AutoDisposable } from '@yume-chan/event';
-import { placeholder, Struct, StructDeserializationContext, StructInitType, StructValueType } from '@yume-chan/struct';
 import { Adb } from '../../adb';
 import { AdbFeatures } from '../../features';
 import { AdbBufferedStream, AdbStream } from '../../stream';
 import { AutoResetEvent } from '../../utils';
-
-export enum AdbSyncRequestId {
-    List = 'LIST',
-    Send = 'SEND',
-    Lstat = 'STAT',
-    Stat = 'STA2',
-    Lstat2 = 'LST2',
-    Data = 'DATA',
-    Done = 'DONE',
-    Receive = 'RECV',
-}
-
-export enum AdbSyncResponseId {
-    Entry = 'DENT',
-    Lstat = 'STAT',
-    Stat = 'STA2',
-    Lstat2 = 'LST2',
-    Done = 'DONE',
-    Data = 'DATA',
-    Ok = 'OKAY',
-    Fail = 'FAIL',
-}
-
-const AdbSyncNumberRequest =
-    new Struct({ littleEndian: true })
-        .string('id', { length: 4 })
-        .uint32('arg');
-
-const AdbSyncStringRequest =
-    AdbSyncNumberRequest
-        .string('data', { lengthField: 'arg' });
-
-const AdbSyncBufferRequest =
-    AdbSyncNumberRequest
-        .arrayBuffer('data', { lengthField: 'arg' });
-
-// https://github.com/python/cpython/blob/4e581d64b8aff3e2eda99b12f080c877bb78dfca/Lib/stat.py#L36
-export enum LinuxFileType {
-    Directory = 0o04,
-    File = 0o10,
-    Link = 0o12,
-}
-
-export const AdbSyncLstatResponse =
-    new Struct({ littleEndian: true })
-        .int32('mode')
-        .int32('size')
-        .int32('mtime')
-        .extra({
-            id: AdbSyncResponseId.Lstat as const,
-            get type() { return this.mode >> 12 as LinuxFileType; },
-            get permission() { return this.mode & 0b00001111_11111111; },
-        })
-        .afterParsed((object) => {
-            if (object.mode === 0 &&
-                object.size === 0 &&
-                object.mtime === 0
-            ) {
-                throw new Error('lstat failed');
-            }
-        });
-
-export type AdbSyncLstatResponse = StructValueType<typeof AdbSyncLstatResponse>;
-
-export enum ErrorCode {
-    EACCES = 13,
-    EEXIST = 17,
-    EFAULT = 14,
-    EFBIG = 27,
-    EINTR = 4,
-    EINVAL = 22,
-    EIO = 5,
-    EISDIR = 21,
-    ELOOP = 40,
-    EMFILE = 24,
-    ENAMETOOLONG = 36,
-    ENFILE = 23,
-    ENOENT = 2,
-    ENOMEM = 12,
-    ENOSPC = 28,
-    ENOTDIR = 20,
-    EOVERFLOW = 75,
-    EPERM = 1,
-    EROFS = 30,
-    ETXTBSY = 26,
-}
-
-export const AdbSyncStatResponse =
-    new Struct({ littleEndian: true })
-        .uint32('error', undefined, placeholder<ErrorCode>())
-        .uint64('dev')
-        .uint64('ino')
-        .uint32('mode')
-        .uint32('nlink')
-        .uint32('uid')
-        .uint32('gid')
-        .uint64('size')
-        .uint64('atime')
-        .uint64('mtime')
-        .uint64('ctime')
-        .extra({
-            id: AdbSyncResponseId.Stat as const,
-            get type() { return this.mode >> 12 as LinuxFileType; },
-            get permission() { return this.mode & 0b00001111_11111111; },
-        })
-        .afterParsed((object) => {
-            if (object.error) {
-                throw new Error(ErrorCode[object.error]);
-            }
-        });
-
-export type AdbSyncStatResponse = StructValueType<typeof AdbSyncStatResponse>;
-
-export const AdbSyncEntryResponse =
-    AdbSyncLstatResponse
-        .afterParsed()
-        .uint32('nameLength')
-        .string('name', { lengthField: 'nameLength' })
-        .extra({ id: AdbSyncResponseId.Entry as const });
-
-export type AdbSyncEntryResponse = StructValueType<typeof AdbSyncEntryResponse>;
-
-export const AdbSyncDataResponse =
-    new Struct({ littleEndian: true })
-        .uint32('dataLength')
-        .arrayBuffer('data', { lengthField: 'dataLength' })
-        .extra({ id: AdbSyncResponseId.Data as const });
-
-export interface AdbSyncDoneResponseDeserializeContext extends StructDeserializationContext {
-    size: number;
-}
-
-export class AdbSyncDoneResponse {
-    public static readonly instance = new AdbSyncDoneResponse();
-
-    public static async deserialize(
-        context: AdbSyncDoneResponseDeserializeContext
-    ): Promise<AdbSyncDoneResponse> {
-        await context.read(context.size);
-        return AdbSyncDoneResponse.instance;
-    }
-
-    public readonly id = AdbSyncResponseId.Done;
-}
-
-export const AdbSyncFailResponse =
-    new Struct({ littleEndian: true })
-        .uint32('messageLength')
-        .string('message', { lengthField: 'messageLength' })
-        .afterParsed(object => {
-            throw new Error(object.message);
-        });
-
-const ResponseTypeMap = {
-    [AdbSyncResponseId.Entry]: AdbSyncEntryResponse,
-    [AdbSyncResponseId.Lstat]: AdbSyncLstatResponse,
-    [AdbSyncResponseId.Stat]: AdbSyncStatResponse,
-    [AdbSyncResponseId.Lstat2]: AdbSyncStatResponse,
-    [AdbSyncResponseId.Data]: AdbSyncDataResponse,
-    [AdbSyncResponseId.Fail]: AdbSyncFailResponse,
-    [AdbSyncResponseId.Done]: AdbSyncDoneResponse,
-} as const;
-
-async function readResponse(stream: AdbBufferedStream, size: number) {
-    // DONE responses' size are always same as the request's normal response.
-    // For example DONE responses for LIST requests are 16 bytes (same as DENT responses),
-    // but DONE responses for STAT requests are 12 bytes (same as STAT responses)
-    // So we need to know responses' size in advance.
-    const id = stream.backend.decodeUtf8(await stream.read(4)) as keyof typeof ResponseTypeMap;
-
-    if (ResponseTypeMap[id]) {
-        return ResponseTypeMap[id].deserialize({
-            size,
-            read: stream.read.bind(stream),
-            decodeUtf8: stream.backend.decodeUtf8.bind(stream.backend),
-            encodeUtf8: stream.backend.encodeUtf8.bind(stream.backend),
-        });
-    }
-
-    await stream.read(size);
-    throw new Error('Unexpected response id');
-}
-
-export function chunkArray(
-    value: ArrayLike<number>,
-    size: number
-): Generator<ArrayBuffer, void, void> {
-    return chunkArrayBuffer(new Uint8Array(value).buffer, size);
-}
-
-export function* chunkArrayBuffer(
-    value: ArrayBufferLike,
-    size: number
-): Generator<ArrayBuffer, void, void> {
-    if (value.byteLength <= size) {
-        return yield value;
-    }
-
-    for (let i = 0; i < value.byteLength; i += size) {
-        yield value.slice(i, i + size);
-    }
-}
-
-export async function* chunkAsyncIterable(
-    value: AsyncIterable<ArrayBuffer>,
-    size: number
-): AsyncGenerator<ArrayBuffer, void, void> {
-    let result = new Uint8Array(size);
-    let index = 0;
-    for await (let buffer of value) {
-        // `result` has some data, `result + buffer` is enough
-        if (index !== 0 && index + buffer.byteLength >= size) {
-            const remainder = size - index;
-            result.set(new Uint8Array(buffer, 0, remainder), index);
-            yield result.buffer;
-
-            result = new Uint8Array(size);
-            index = 0;
-
-            if (buffer.byteLength > remainder) {
-                // `buffer` still has some data
-                buffer = buffer.slice(remainder);
-            } else {
-                continue;
-            }
-        }
-
-        // `result` is empty, `buffer` alone is enough
-        if (buffer.byteLength >= size) {
-            let remainder = false;
-            for (const chunk of chunkArrayBuffer(buffer, size)) {
-                if (chunk.byteLength === size) {
-                    yield chunk;
-                }
-
-                // `buffer` still has some data
-                remainder = true;
-                buffer = chunk;
-            }
-
-            if (!remainder) {
-                continue;
-            }
-        }
-
-        // `result` has some data but `result + buffer` is still not enough
-        // or after previous steps `buffer` still has some data
-        result.set(new Uint8Array(buffer), index);
-        index += buffer.byteLength;
-    }
-}
+import { AdbSyncEntryResponse, adbSyncOpenDir } from './list';
+import { adbSyncPull } from './receive';
+import { adbSyncPush } from './send';
+import { adbSyncLstat, adbSyncStat } from './stat';
 
 export class AdbSync extends AutoDisposable {
     protected adb: Adb;
@@ -274,37 +26,11 @@ export class AdbSync extends AutoDisposable {
         this.stream = new AdbBufferedStream(stream);
     }
 
-    protected send<T extends Struct<object, object, object, unknown>>(
-        type: T,
-        value: StructInitType<T>
-    ) {
-        return this.stream.write(type.serialize(value, this.stream.backend));
-    }
-
-    public async lstat(path: string): Promise<AdbSyncLstatResponse | AdbSyncStatResponse> {
+    public async lstat(path: string) {
         await this.sendLock.wait();
 
         try {
-            let requestId: AdbSyncRequestId.Lstat | AdbSyncRequestId.Lstat2;
-            let responseType: typeof AdbSyncLstatResponse | typeof AdbSyncStatResponse;
-            let responseId: AdbSyncResponseId.Lstat | AdbSyncResponseId.Stat;
-
-            if (this.supportStat) {
-                requestId = AdbSyncRequestId.Lstat2;
-                responseType = AdbSyncStatResponse;
-                responseId = AdbSyncResponseId.Stat;
-            } else {
-                requestId = AdbSyncRequestId.Lstat;
-                responseType = AdbSyncLstatResponse;
-                responseId = AdbSyncResponseId.Lstat;
-            }
-
-            await this.send(AdbSyncStringRequest, { id: requestId, data: path });
-            const response = await readResponse(this.stream, responseType.size);
-            if (response.id !== responseId) {
-                throw new Error('Unexpected response id');
-            }
-            return response;
+            return adbSyncLstat(this.stream, path, this.supportStat);
         } finally {
             this.sendLock.notify();
         }
@@ -318,48 +44,28 @@ export class AdbSync extends AutoDisposable {
         await this.sendLock.wait();
 
         try {
-            await this.send(AdbSyncStringRequest, { id: AdbSyncRequestId.Stat, data: path });
-            const response = await readResponse(this.stream, AdbSyncStatResponse.size);
-            if (response.id !== AdbSyncResponseId.Stat) {
-                throw new Error('Unexpected response id');
-            }
-            return response;
+            return adbSyncStat(this.stream, path);
         } finally {
             this.sendLock.notify();
         }
     }
 
     public async isDirectory(path: string): Promise<boolean> {
-        await this.sendLock.wait();
-
         try {
             await this.stat(path + '/');
             return true;
         } catch (e) {
             return false;
-        } finally {
-            this.sendLock.notify();
         }
     }
 
-    public async *opendir(path: string) {
+    public async *opendir(
+        path: string
+    ): AsyncGenerator<AdbSyncEntryResponse, void, void> {
         await this.sendLock.wait();
 
         try {
-            await this.send(AdbSyncStringRequest, { id: AdbSyncRequestId.List, data: path });
-
-            while (true) {
-                const response = await readResponse(this.stream, AdbSyncEntryResponse.size);
-                switch (response.id) {
-                    case AdbSyncResponseId.Entry:
-                        yield response;
-                        break;
-                    case AdbSyncResponseId.Done:
-                        return;
-                    default:
-                        throw new Error('Unexpected response id');
-                }
-            }
+            yield* adbSyncOpenDir(this.stream, path);
         } finally {
             this.sendLock.notify();
         }
@@ -377,36 +83,12 @@ export class AdbSync extends AutoDisposable {
         await this.sendLock.wait();
 
         try {
-            await this.send(AdbSyncStringRequest, { id: AdbSyncRequestId.Receive, data: path });
-            while (true) {
-                const response = await readResponse(this.stream, AdbSyncDataResponse.size);
-                switch (response.id) {
-                    case AdbSyncResponseId.Data:
-                        yield response.data!;
-                        break;
-                    case AdbSyncResponseId.Done:
-                        return;
-                    default:
-                        throw new Error('Unexpected response id');
-                }
-            }
+            yield* adbSyncPull(this.stream, path);
         } finally {
             this.sendLock.notify();
         }
     }
 
-    public async write(
-        path: string,
-        file: AsyncIterable<ArrayBuffer>,
-        mode?: number,
-        mtime?: number,
-    ): Promise<void>;
-    public async write(
-        path: string,
-        file: ArrayLike<number>,
-        mode?: number,
-        mtime?: number,
-    ): Promise<void>;
     public async write(
         path: string,
         file: AsyncIterable<ArrayBuffer> | ArrayLike<number>,
@@ -414,35 +96,9 @@ export class AdbSync extends AutoDisposable {
         mtime = Date.now(),
     ): Promise<void> {
         await this.sendLock.wait();
-        const packetSize = 64 * 1024;
 
         try {
-            const pathAndMode = `${path},${mode.toString(8)}`;
-            await this.send(AdbSyncStringRequest, {
-                id: AdbSyncRequestId.Send,
-                data: pathAndMode
-            });
-
-            let chunkReader: Iterable<ArrayBuffer> | AsyncIterable<ArrayBuffer>;
-            if ('length' in file) {
-                chunkReader = chunkArray(file, packetSize);
-            } else if ('byteLength' in file) {
-                chunkReader = chunkArrayBuffer(file, packetSize);
-            } else {
-                chunkReader = chunkAsyncIterable(file, packetSize);
-            }
-
-            for await (const buffer of chunkReader) {
-                await this.send(AdbSyncBufferRequest, {
-                    id: AdbSyncRequestId.Data,
-                    data: buffer,
-                });
-            }
-
-            await this.send(AdbSyncNumberRequest, {
-                id: AdbSyncRequestId.Send,
-                arg: mtime
-            });
+            adbSyncPush(this.stream, path, file, mode, mtime);
         } finally {
             this.sendLock.notify();
         }

packages/adb/src/commands/tcpip.ts

@@ -1,23 +1,18 @@
 import { AdbCommandBase } from './base';
 
 export class AdbTcpIpCommand extends AdbCommandBase {
-    private async getProp(key: string): Promise<string> {
-        const output = await this.adb.shell('getprop', key);
-        return output.trim();
-    }
-
     public async getAddresses(): Promise<string[]> {
-        const propAddr = await this.getProp('service.adb.listen_addrs');
+        const propAddr = await this.adb.getProp('service.adb.listen_addrs');
         if (propAddr) {
             return propAddr.split(',');
         }
 
-        let port = await this.getProp('service.adb.tcp.port');
+        let port = await this.adb.getProp('service.adb.tcp.port');
         if (port) {
             return [`0.0.0.0:${port}`];
         }
 
-        port = await this.getProp('persist.adb.tcp.port');
+        port = await this.adb.getProp('persist.adb.tcp.port');
         if (port) {
             return [`0.0.0.0:${port}`];
         }

packages/adb/src/crypto.ts

@@ -257,7 +257,7 @@ export function sign(privateKey: ArrayBuffer, data: ArrayBuffer): ArrayBuffer {
     const fillLength = padded.length - Sha1DigestInfo.length - data.byteLength - 1;
     while (index < fillLength) {
         padded[index] = 0xff;
-        index++;
+        index += 1;
     }
 
     padded[index] = 0;

packages/adb/src/index.ts

@@ -1,10 +1,9 @@
 export * from './adb';
 export * from './auth';
 export * from './backend';
+export * from './commands';
 export * from './crypto';
 export * from './features';
-export * from './framebuffer';
 export * from './packet';
 export * from './stream';
-export * from './sync';
 export * from './utils';

packages/adb/src/stream/dispatcher.ts

@@ -11,7 +11,7 @@ export interface AdbPacketReceivedEventArgs {
     packet: AdbPacket;
 }
 
-export interface AdbStreamCreatedEventArgs {
+export interface AdbIncomingStreamEventArgs {
     handled: boolean;
 
     packet: AdbPacket;
@@ -30,7 +30,7 @@ export class AdbPacketDispatcher extends AutoDisposable {
     private readonly packetEvent = this.addDisposable(new EventEmitter<AdbPacketReceivedEventArgs>());
     public get onPacket() { return this.packetEvent.event; }
 
-    private readonly streamEvent = this.addDisposable(new EventEmitter<AdbStreamCreatedEventArgs>());
+    private readonly streamEvent = this.addDisposable(new EventEmitter<AdbIncomingStreamEventArgs>());
     public get onStream() { return this.streamEvent.event; }
 
     private readonly errorEvent = this.addDisposable(new EventEmitter<Error>());
@@ -132,7 +132,7 @@ export class AdbPacketDispatcher extends AutoDisposable {
         const controller = new AdbStreamController(localId, remoteId, this);
         const stream = new AdbStream(controller);
 
-        const args: AdbStreamCreatedEventArgs = {
+        const args: AdbIncomingStreamEventArgs = {
             handled: false,
             packet,
             stream,

packages/adb/src/utils/base64.ts

@@ -18,7 +18,7 @@ function addRange(start: string, end: string) {
     const endCharCode = end.charCodeAt(0);
     const length = endCharCode - startCharCode + 1;
 
-    for (let i = startCharCode; i <= endCharCode; i++) {
+    for (let i = startCharCode; i <= endCharCode; i += 1) {
         chars.push(i);
     }
 

packages/struct/src/struct.ts

@@ -3,8 +3,8 @@ import { Array, FieldDescriptorBase, FieldDescriptorBaseOptions, FieldType, Fiel
 import { StructDefaultOptions, StructDeserializationContext, StructOptions, StructSerializationContext } from './types';
 import { Evaluate, Identity, OmitNever, Overwrite } from './utils';
 
-export type StructValueType<T extends Struct<object, object, object, unknown>> =
-    T extends { deserialize(reader: StructDeserializationContext): Promise<infer R>; } ? R : never;
+export type StructValueType<T> =
+    T extends { deserialize(context: StructDeserializationContext): Promise<infer R>; } ? R : never;
 
 export type StructInitType<T extends Struct<object, object, object, unknown>> =
     T extends { create(value: infer R, ...args: any): any; } ? Evaluate<R> : never;
@@ -407,7 +407,7 @@ export default class Struct<
 
         let size = this._size;
         let fieldSize: number[] = [];
-        for (let i = 0; i < this.fields.length; i++) {
+        for (let i = 0; i < this.fields.length; i += 1) {
             const field = this.fields[i];
             const type = getFieldTypeDefinition(field.type);
             if (type.getDynamicSize) {
@@ -426,7 +426,7 @@ export default class Struct<
         const buffer = new ArrayBuffer(size);
         const dataView = new DataView(buffer);
         let offset = 0;
-        for (let i = 0; i < this.fields.length; i++) {
+        for (let i = 0; i < this.fields.length; i += 1) {
             const field = this.fields[i];
             const type = getFieldTypeDefinition(field.type);
             type.serialize({