Binary file reader for react-native
npm install react-native-binary-fileA simple binary file reader for react-native. It uses RandomAccessFile and FileHandle.
$npm i react-native-binary-file
Or
$ yarn add react-native-binary-file
#### React-Native < 0.60.x
$ react-native link react-native-binary-file
You can add and install use react-native install
$ react-native install react-native-binary-file
#### iOS
1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ react-native-binary-file and add RNBinaryFile.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNBinaryFile.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<
#### Android
1. Open up android/app/src/main/java/[...]/MainActivity.java
2. Add import com.reactlibrary.RNBinaryFilePackage; to the imports at the top of the file
3. Add new RNBinaryFilePackage() to the list returned by the getPackages() method
4. Setup gradle
Append the following lines to android/settings.gradle:
``gradle`
include ':react-native-binary-file'
project(':react-native-binary-file').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-binary-file/android')
Insert the following lines inside the dependencies block in android/app/build.gradle:
`gradle`
compile project(':react-native-binary-file')
`javascript`
class BinaryFile {
open(filename: string): Promise
close(fd: number): Promise
seek(fd: number, pos: number): Promise
read(fd: number, len: number): Promise
readByte(fd: number): Promise
readInt32(fd: number): Promise
readInt64(fd: number): Promise
readFloat32(fd: number): Promise
readFloat64(fd: number): Promise
}
`javascript
import { BinaryFile } from 'react-native-binary-file';
// Open a file for reading
const fd = await BinaryFile.open('path-to-file');
// Read a byte
const byteValue = await BinaryFile.readByte(fd);
// Read a next integer (int32) - big endian
const intValue = await BinaryFile.readInt32(fd);
// Read a next integer (int64) - big endian
const intValue = await BinaryFile.readInt64(fd);
// Seek to 1024
await BinaryFile.seek(fd, 1024);
// Read 512 bytes (uint8[])
const buffer = await BinaryFile.read(fd, 512);
// Close the file
await BinaryFile.close(fd);
// Another file
const fd2 = await BinaryFile.open('path-to-file-2');
// ...
await BinaryFile.close(fd2);
``