How to use readBufferSource method in wpt

Best JavaScript code snippet using wpt

read_write_async_buffer_offset.tentative.https.any.js

Source:read_write_async_buffer_offset.tentative.https.any.js

1// META: title=NativeIO API: Read/write correctly offsets into the source buffer2// META: global=window,worker3// META: script=resources/support.js4'use strict';5promise_test(async testCase => {6  await reserveAndCleanupCapacity(testCase);7  const file = await storageFoundation.open('test_file');8  testCase.add_cleanup(async () => {9    await file.close();10    await storageFoundation.delete('test_file');11  });12  const writeBufferData = new Uint8Array([64, 65, 66, 67, 68, 69, 70, 71]);13  const writeBufferSource = new Uint8Array(writeBufferData.buffer, 3, 4);14  assert_equals(writeBufferSource.byteOffset, 3, 'Test setup error');15  assert_equals(writeBufferSource.byteLength, 4, 'Test setup error');16  assert_equals(writeBufferSource.buffer.byteLength, 8, 'Test setup error');17  const {buffer: writeBuffer, writtenBytes} =18      await file.write(writeBufferSource, 0);19  assert_equals(20      writtenBytes, 4,21      'NativeIOFile.write() should resolve with the number of bytes written');22  assert_equals(23      writeBuffer.byteOffset, 3,24      'NativeIOFile.write() should produce the same view offset as its input');25  assert_equals(26      writeBuffer.byteLength, 4,27      'NativeIOFile.write() should produce the same view size as its input');28  assert_equals(29      writeBuffer.buffer.byteLength, 8,30      'NativeIOFile.write() should use the same buffer as its input');31  const {buffer: readBuffer, readBytes} = await file.read(new Uint8Array(4), 0);32  assert_equals(33      readBytes, 4,34      'NativeIOFile.write() should write the entire view size');35  assert_array_equals(36      readBuffer, [67, 68, 69, 70],37      'NativeIOFile.write() should account for the buffer offset');38}, 'NativeIOFile.write with a Uint8Array accounts for the buffer offset');39promise_test(async testCase => {40  await reserveAndCleanupCapacity(testCase);41  const file = await storageFoundation.open('test_file');42  testCase.add_cleanup(async () => {43    await file.close();44    await storageFoundation.delete('test_file');45  });46  const writeBufferData = new Uint16Array(47      [0x4041, 0x4243, 0x4445, 0x4647, 0x4849, 0x4a4b, 0x4c4d, 0x4e4f]);48  const writeBufferSource = new Uint16Array(writeBufferData.buffer, 6, 4);49  assert_equals(writeBufferSource.byteOffset, 6, 'Test setup error');50  assert_equals(writeBufferSource.byteLength, 8, 'Test setup error');51  assert_equals(writeBufferSource.buffer.byteLength, 16, 'Test setup error');52  const {buffer: writeBuffer, writtenBytes} =53      await file.write(writeBufferSource, 0);54  assert_equals(55      writtenBytes, 8,56      'NativeIOFile.write() should resolve with the number of bytes written');57  assert_equals(58      writeBuffer.byteOffset, 6,59      'NativeIOFile.write() should produce the same view offset as its input');60  assert_equals(61      writeBuffer.byteLength, 8,62      'NativeIOFile.write() should produce the same view size as its input');63  assert_equals(64      writeBuffer.buffer.byteLength, 16,65      'NativeIOFile.write() should use the same buffer as its input');66  const {buffer: readBuffer, readBytes} =67      await file.read(new Uint16Array(4), 0);68  assert_equals(69      readBytes, 8,70      'NativeIOFile.write() should write the entire view size');71  assert_array_equals(72      readBuffer, [0x4647, 0x4849, 0x4a4b, 0x4c4d],73      'NativeIOFile.write() should account for the buffer offset');74}, 'NativeIOFile.write with a Uint16Array accounts for the buffer offset');75promise_test(async testCase => {76  await reserveAndCleanupCapacity(testCase);77  const file = await storageFoundation.open('test_file');78  testCase.add_cleanup(async () => {79    await file.close();80    await storageFoundation.delete('test_file');81  });82  const {buffer: writeBuffer, writtenBytes} =83      await file.write(new Uint8Array([64, 65, 66, 67]), 0);84  assert_equals(85      writtenBytes, 4,86      'NativeIOFile.write() should resolve with the number of bytes written');87  const readBufferData = new Uint8Array(8);88  const readBufferSource = new Uint8Array(readBufferData.buffer, 3, 4);89  assert_equals(readBufferSource.byteOffset, 3, 'Test setup error');90  assert_equals(readBufferSource.byteLength, 4, 'Test setup error');91  assert_equals(readBufferSource.buffer.byteLength, 8, 'Test setup error');92  const {buffer: readBuffer, readBytes} = await file.read(readBufferSource, 0);93  assert_equals(94      readBytes, 4,95      'NativeIOFile.read() should read the entire input view size');96  assert_equals(97      readBuffer.byteOffset, 3,98      'NativeIOFile.read() should produce the same view offset as its input');99  assert_equals(100      readBuffer.byteLength, 4,101      'NativeIOFile.read() should produce the same view size as its input');102  assert_equals(103      readBuffer.buffer.byteLength, 8,104      'NativeIOFile.read() should use the same buffer as its input');105  assert_array_equals(106      readBuffer, writeBuffer,107      'NativeIOFile.read() should account for the buffer offset');108  const readBufferFull = new Uint8Array(readBuffer.buffer);109  assert_array_equals(110      readBufferFull, [0, 0, 0, 64, 65, 66, 67, 0],111      'NativeIOFile.read() should leave the buffer outside the view untouched');112}, 'NativeIOFile.read with a Uint8Array accounts for the buffer offset');113promise_test(async testCase => {114  await reserveAndCleanupCapacity(testCase);115  const file = await storageFoundation.open('test_file');116  testCase.add_cleanup(async () => {117    await file.close();118    await storageFoundation.delete('test_file');119  });120  const {buffer: writeBuffer, writtenBytes} =121      await file.write(new Uint16Array([0x4041, 0x4243, 0x4445, 0x4647]), 0);122  assert_equals(123      writtenBytes, 8,124      'NativeIOFile.write() should resolve with the number of bytes written');125  const readBufferData = new Uint16Array(8);126  const readBufferSource = new Uint16Array(readBufferData.buffer, 6, 4);127  assert_equals(readBufferSource.byteOffset, 6, 'Test setup error');128  assert_equals(readBufferSource.byteLength, 8, 'Test setup error');129  assert_equals(readBufferSource.buffer.byteLength, 16, 'Test setup error');130  const {buffer: readBuffer, readBytes} = await file.read(readBufferSource, 0);131  assert_equals(132      readBytes, 8,133      'NativeIOFile.read() should read the entire input view size');134  assert_equals(135      readBuffer.byteOffset, 6,136      'NativeIOFile.read() should produce the same view offset as its input');137  assert_equals(138      readBuffer.byteLength, 8,139      'NativeIOFile.read() should produce the same view size as its input');140  assert_equals(141      readBuffer.buffer.byteLength, 16,142      'NativeIOFile.read() should use the same buffer as its input');143  assert_array_equals(144      readBuffer, writeBuffer,145      'NativeIOFile.read() should account for the buffer offset');146  const readBufferFull = new Uint16Array(readBuffer.buffer);147  assert_array_equals(148      readBufferFull, [0, 0, 0, 0x4041, 0x4243, 0x4445, 0x4647, 0],149      'NativeIOFile.read() should leave the buffer outside the view untouched');...

read_write_sync_buffer_offset.tentative.https.any.js

Source:read_write_sync_buffer_offset.tentative.https.any.js

1// META: title=NativeIO API: Read/write correctly offsets into the source buffer2// META: global=dedicatedworker3// META: script=resources/support.js4'use strict';5test(testCase => {6  reserveAndCleanupCapacitySync(testCase);7  const file = storageFoundation.openSync('test_file');8  testCase.add_cleanup(() => {9    file.close();10    storageFoundation.deleteSync('test_file');11  });12  const writeBufferData = new Uint8Array([64, 65, 66, 67, 68, 69, 70, 71]);13  const writeBufferSource = new Uint8Array(writeBufferData.buffer, 3, 4);14  assert_equals(writeBufferSource.byteOffset, 3, 'Test setup error');15  assert_equals(writeBufferSource.byteLength, 4, 'Test setup error');16  assert_equals(writeBufferSource.buffer.byteLength, 8, 'Test setup error');17  const {buffer: writeBuffer, writtenBytes} = file.write(writeBufferSource, 0);18  assert_equals(19      writtenBytes, 4,20      'NativeIOFileSync.write() should return the number of bytes written');21  assert_equals(22      writeBuffer.byteOffset, 3,23      'NativeIOFileSync.write() should return the input view offset');24  assert_equals(25      writeBuffer.byteLength, 4,26      'NativeIOFileSync.write() should return the input view size');27  assert_equals(28      writeBuffer.buffer.byteLength, 8,29      'NativeIOFileSync.write() should use the same buffer as its input');30  const {buffer: readBuffer, readBytes} = file.read(new Uint8Array(4), 0);31  assert_equals(32      readBytes, 4,33      'NativeIOFileSync.write() should write the entire view size');34  assert_array_equals(35      readBuffer, [67, 68, 69, 70],36      'NativeIOFileSync.write() should account for the buffer offset');37}, 'NativeIOFileSync.write with a Uint8Array accounts for the buffer offset');38test(testCase => {39  reserveAndCleanupCapacitySync(testCase);40  const file = storageFoundation.openSync('test_file');41  testCase.add_cleanup(() => {42    file.close();43    storageFoundation.deleteSync('test_file');44  });45  const writeBufferData = new Uint16Array(46      [0x4041, 0x4243, 0x4445, 0x4647, 0x4849, 0x4a4b, 0x4c4d, 0x4e4f]);47  const writeBufferSource = new Uint16Array(writeBufferData.buffer, 6, 4);48  assert_equals(writeBufferSource.byteOffset, 6, 'Test setup error');49  assert_equals(writeBufferSource.byteLength, 8, 'Test setup error');50  assert_equals(writeBufferSource.buffer.byteLength, 16, 'Test setup error');51  const {buffer: writeBuffer, writtenBytes} = file.write(writeBufferSource, 0);52  assert_equals(53      writtenBytes, 8,54      'NativeIOFileSync.write() should return the number of bytes written');55  assert_equals(56      writeBuffer.byteOffset, 6,57      'NativeIOFileSync.write() should return the input view offset');58  assert_equals(59      writeBuffer.byteLength, 8,60      'NativeIOFileSync.write() should return the input view size');61  assert_equals(62      writeBuffer.buffer.byteLength, 16,63      'NativeIOFileSync.write() should use the same buffer as its input');64  const {buffer: readBuffer, readBytes} = file.read(new Uint16Array(4), 0);65  assert_equals(66      readBytes, 8,67      'NativeIOFile.write() should write the entire view size');68  assert_array_equals(69      readBuffer, [0x4647, 0x4849, 0x4a4b, 0x4c4d],70      'NativeIOFileSync.write() should account for the buffer offset');71}, 'NativeIOFileSync.write with a Uint16Array accounts for the buffer offset');72test(testCase => {73  reserveAndCleanupCapacitySync(testCase);74  const file = storageFoundation.openSync('test_file');75  testCase.add_cleanup(() => {76    file.close();77    storageFoundation.deleteSync('test_file');78  });79  const {buffer: writeBuffer, writtenBytes} =80      file.write(new Uint8Array([64, 65, 66, 67]), 0);81  assert_equals(82      writtenBytes, 4,83      'NativeIOFileSync.write() should return the number of bytes written');84  const readBufferData = new Uint8Array(8);85  const readBufferSource = new Uint8Array(readBufferData.buffer, 3, 4);86  assert_equals(readBufferSource.byteOffset, 3, 'Test setup error');87  assert_equals(readBufferSource.byteLength, 4, 'Test setup error');88  assert_equals(readBufferSource.buffer.byteLength, 8, 'Test setup error');89  const {buffer: readBuffer, readBytes} = file.read(readBufferSource, 0);90  assert_equals(91      readBytes, 4,92      'NativeIOFileSync.read() should read the entire input view size');93  assert_equals(94      readBuffer.byteOffset, 3,95      'NativeIOFileSync.read() should return the input view offset');96  assert_equals(97      readBuffer.byteLength, 4,98      'NativeIOFileSync.read() should return the input view size');99  assert_equals(100      readBuffer.buffer.byteLength, 8,101      'NativeIOFileSync.read() should use the same buffer as its input');102  assert_array_equals(103      readBuffer, writeBuffer,104      'NativeIOFileSync.read() should account for the buffer offset');105  const readBufferFull = new Uint8Array(readBuffer.buffer);106  assert_array_equals(107      readBufferFull, [0, 0, 0, 64, 65, 66, 67, 0],108      'NativeIOFileSync.read() should leave the buffer outside the view ' +109      'untouched');110}, 'NativeIOFileSync.read with a Uint8Array accounts for the buffer offset');111test(testCase => {112  reserveAndCleanupCapacitySync(testCase);113  const file = storageFoundation.openSync('test_file');114  testCase.add_cleanup(() => {115    file.close();116    storageFoundation.deleteSync('test_file');117  });118  const {buffer: writeBuffer, writtenBytes} =119      file.write(new Uint16Array([0x4041, 0x4243, 0x4445, 0x4647]), 0);120  assert_equals(121      writtenBytes, 8,122      'NativeIOFileSync.write() should return the number of bytes written');123  const readBufferData = new Uint16Array(8);124  const readBufferSource = new Uint16Array(readBufferData.buffer, 6, 4);125  assert_equals(readBufferSource.byteOffset, 6, 'Test setup error');126  assert_equals(readBufferSource.byteLength, 8, 'Test setup error');127  assert_equals(readBufferSource.buffer.byteLength, 16, 'Test setup error');128  const {buffer: readBuffer, readBytes} = file.read(readBufferSource, 0);129  assert_equals(130      readBytes, 8,131      'NativeIOFileSync.read() should read the entire input view size');132  assert_equals(133      readBuffer.byteOffset, 6,134      'NativeIOFileSync.read() should return the input view offset');135  assert_equals(136      readBuffer.byteLength, 8,137      'NativeIOFileSync.read() should return the input view size');138  assert_equals(139      readBuffer.buffer.byteLength, 16,140      'NativeIOFileSync.read() should use the same buffer as its input');141  assert_array_equals(142      readBuffer, writeBuffer,143      'NativeIOFileSync.read() should account for the buffer offset');144  const readBufferFull = new Uint16Array(readBuffer.buffer);145  assert_array_equals(146      readBufferFull, [0, 0, 0, 0x4041, 0x4243, 0x4445, 0x4647, 0],147      'NativeIOFileSync.read() should leave the buffer outside the view ' +148      'untouched');...

i2c-addressed.ts

Source:i2c-addressed.ts

1/* eslint-disable fp/no-unused-expression */2/* eslint-disable no-undefined */3import { I2CAddress, I2CBufferSource, I2CBus } from './i2c'4const BASE_16 = 165export type ABOptions = {6  sharedReadBuffer?: I2CBufferSource,7  allocOnRead: boolean,8  allowMixedReadBuffers: boolean,9  maxReadLength: number10  maxWriteLength: number,11  validateReadWriteLengths: boolean12}13const WARN_READ_LENGTH = 3214const WARN_WRITE_LENGTH = 3215function assertBufferSource(bs: I2CBufferSource) {16  if(bs === undefined) {17    throw new Error('bufferSource undefined')18  }19  const isView = ArrayBuffer.isView(bs)20  const isAB = bs instanceof ArrayBuffer21  if(!isView && !isAB) {22    throw new Error('bufferSource is not ArrayBuffer or ArrayBufferView')23  }24}25/**26 * I2CBus layer providing address encapsulation.27 **/28export class I2CAddressedBus {29  private readonly address: I2CAddress30  private readonly bus: I2CBus31  private readonly options: ABOptions32  static from(bus: I2CBus, address: I2CAddress, options?: Partial<ABOptions>): I2CAddressedBus {33    return new I2CAddressedBus(bus, address, options)34  }35  constructor(bus: I2CBus, address: I2CAddress, options: Partial<ABOptions> = { allocOnRead: true }) {36    this.address = address37    this.bus = bus38    this.options = {39      sharedReadBuffer: options.sharedReadBuffer ?? undefined,40      allocOnRead: options.allocOnRead === true,41      allowMixedReadBuffers: false,42      maxReadLength: WARN_READ_LENGTH,43      maxWriteLength: WARN_WRITE_LENGTH,44      validateReadWriteLengths: true45    }46  }47  get name(): string {48    return this.bus.name + ':0x' + this.address.toString(BASE_16)49  }50  private _getReadBuffer(length: number, readBufferSource?: I2CBufferSource): I2CBufferSource {51    const hasOptionsBuffer = this.options.sharedReadBuffer !== undefined52    if(readBufferSource !== undefined && !(hasOptionsBuffer && !this.options.allowMixedReadBuffers)) {53      return readBufferSource54    }55    if(this.options.sharedReadBuffer !== undefined) {56      return this.options.sharedReadBuffer57    }58    if(this.options.allocOnRead) {59      return new ArrayBuffer(length)60    }61    throw new Error('no provided read buffer and allocation disabled')62  }63  close(): void { return this.bus.close() }64  async readI2cBlock(cmd: number, length: number, readBufferSource?: I2CBufferSource): Promise<ArrayBuffer> {65    if(length > this.options.maxReadLength) {66      throw new Error('read length greater then max configured')67    }68    const readBuffer = this._getReadBuffer(length, readBufferSource)69    const { bytesRead, buffer } = await this.bus.readI2cBlock(this.address, cmd, length, readBuffer)70    if(this.options.validateReadWriteLengths && bytesRead !== length) {71      throw new Error('read length mismatch - ' + bytesRead + ' / ' + length)72    }73    //74    return buffer.slice(0, bytesRead)75  }76  async writeI2cBlock(cmd: number, bufferSource: I2CBufferSource): Promise<void> {77    assertBufferSource(bufferSource)78    if(bufferSource.byteLength > this.options.maxWriteLength) {79      throw new Error('write length greater then max configured')80    }81    const { bytesWritten } = await this.bus.writeI2cBlock(this.address, cmd, bufferSource.byteLength, bufferSource)82    if(this.options.validateReadWriteLengths && bytesWritten !== bufferSource.byteLength) {83      throw new Error('write length mismatch: ' + bytesWritten + '/' + bufferSource.byteLength)84    }85  }86  async sendByte(value: number): Promise<void> {87    await this.bus.sendByte(this.address, value)88  }89  async i2cRead(length: number, readBufferSource?: I2CBufferSource): Promise<ArrayBuffer> {90    const readBuffer = this._getReadBuffer(length, readBufferSource)91    const { bytesRead, buffer } = await this.bus.i2cRead(this.address, length, readBuffer)92    if(this.options.validateReadWriteLengths && bytesRead !== length) {93      throw new Error('read length mismatch: ' + bytesRead + '/' + length)94    }95    //96    return buffer.slice(0, bytesRead)97  }98  async i2cWrite(bufferSource: I2CBufferSource): Promise<void> {99    assertBufferSource(bufferSource)100    const { bytesWritten } = await this.bus.i2cWrite(this.address, bufferSource.byteLength, bufferSource)101    if(this.options.validateReadWriteLengths && bytesWritten !== bufferSource.byteLength) {102      throw new Error('write length mismatch')103    }104  }...

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var buffer = new Buffer(100);4var fd = fs.openSync('test.txt', 'r');5wptools.readBufferSource(fd, buffer, 0, 100, 0, function(err, bytesRead, buffer) {6    if (err) {7        console.log(err);8    } else {9        console.log(buffer.toString());10    }11});12wptools.readBufferSource(source, buffer, offset, length, position, callback)13var wptools = require('wptools');14var fs = require('fs');15var buffer = new Buffer(100);16var fd = fs.openSync('test.txt', 'r');17wptools.readBufferSource(fd, buffer, 0, 100, 0, function(err, bytesRead, buffer) {18    if (err) {19        console.log(err);20    } else {21        console.log(buffer.toString());22    }23});24wptools.readFile(filename, options, callback)25var wptools = require('wptools');26wptools.readFile('test.txt

Using AI Code Generation

1const wptools = require('wp-tools');2const fs = require('fs');3var data = fs.readFileSync('test.docx');4wptools.readBufferSource(data).then((result) => {5    console.log(result);6}).catch((err) => {7    console.log(err);8});9const wptools = require('wp-tools');10const fs = require('fs');11var data = fs.readFileSync('test.docx');12var result = wptools.readBufferSourceSync(data);13console.log(result);14const wptools = require('wp-tools');15const fs = require('fs');16var data = fs.createReadStream('test.docx');17wptools.readStreamSource(data).then((result) => {18    console.log(result);19}).catch((err) => {20    console.log(err);21});22const wptools = require('wp-tools');23const fs = require('fs');24var data = fs.createReadStream('test.docx');25var result = wptools.readStreamSourceSync(data);26console.log(result);27[MIT](LICENSE)

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