flutter_vid/lib/us/vid_us_data_writer.dart

import 'dart:typed_data';

///Not used for now.
class VidUsDataWriter {
  final BytesBuilder _builder = BytesBuilder();

  Uint8List get data => _builder.toBytes();

  void writeString(String value) {
    var data = value.codeUnits;
    var length = data.length * 2;
    writeInt(length);
    for (var codeUnit in data) {
      _builder.addByte(codeUnit & 0xff);
      _builder.addByte((codeUnit >> 8) & 0xff);
    }
  }

  void writeInt(int value) {
    var data = Uint8List(4);
    data.buffer.asByteData().setInt32(0, value, Endian.little);
    _builder.add(data);
  }

  void writeInt16(int value) {
    var data = Uint8List(2);
    data.buffer.asByteData().setInt16(0, value, Endian.little);
    _builder.add(data);
  }

  void writeInt64(int value) {
    var data = Uint8List(8);
    data.buffer.asByteData().setInt64(0, value, Endian.little);
    _builder.add(data);
  }

  void writeInt64V2(int value) {
    int low = value & 0xFFFFFFFF;
    int high = (value >> 32) & 0xFFFFFFFF;
    writeInt(low);
    writeInt(high);
  }

  void writeFloat(double value) {
    var data = Uint8List(4);
    data.buffer.asByteData().setFloat32(0, value, Endian.little);
    _builder.add(data);
  }

  void writeDouble(double value) {
    var data = Uint8List(8);
    data.buffer.asByteData().setFloat64(0, value, Endian.little);
    _builder.add(data);
  }

  void writeBool(bool value) {
    _builder.addByte(value ? 1 : 0);
  }

  void writeByte(int value) {
    _builder.addByte(value);
  }

  void writeBytes(Uint8List value) {
    writeInt(value.length);
    _builder.add(value);
  }

  void writeLongs(Int64List value) {
    _builder.add(value.buffer.asUint8List());
  }
}