C#使用位域技术进行对象二进制序列化优

public class SystemProcess
{
    public int PID { get; set; }
    public string? Name { get; set; }
    public string? Publisher { get; set; }
    public string? CommandLine { get; set; }
    public string? CPU { get; set; }
    public string? Memory { get; set; }
    public string? Disk { get; set; }
    public string? Network { get; set; }
    public string? GPU { get; set; }
    public string? GPUEngine { get; set; }
    public string? PowerUsage { get; set; }
    public string? PowerUsageTrend { get; set; }
    public string? Type { get; set; }
    public string? Status { get; set; }
}

private SystemProcess _codeWFObject = new SystemProcess()
{
    PID = 10565,
    Name = "码界工坊",
    Publisher = "沙漠尽头的狼",
    CommandLine = "dotnet CodeWF.Tools.dll",
    CPU = "2.3%",
    Memory = "0.1%",
    Disk = "0.1 MB/秒",
    Network = "0 Mbps",
    GPU = "2.2%",
    GPUEngine = "GPU 0 - 3D",
    PowerUsage = "低",
    PowerUsageTrend = "非常低",
    Type = "应用",
    Status = "效率模式"
};

public class SysteProcessUnitTest
{
    private readonly ITestOutputHelper _testOutputHelper;

    private SystemProcess _codeWFObject // 前面已给出定义，这里省

    public SysteProcessUnitTest(ITestOutputHelper testOutputHelper)
    {
        _testOutputHelper = testOutputHelper;
    }

    /// <summary>
    /// Json序列化大小测试
    /// </summary>
    [Fact]
    public void Test_SerializeJsonData_Success()
    {
        var jsonData = JsonSerializer.Serialize(_codeWFObject);
        _testOutputHelper.WriteLine($"Json长度：{jsonData.Length}");

        var jsonDataBytes = Encoding.UTF8.GetBytes(jsonData);
        _testOutputHelper.WriteLine($"json二进制长度：{jsonDataBytes.Length}");
    }
}

/// <summary>
/// 网络对象序列化接口
/// </summary>
public interface INetObject
{
}

[NetHead(1, 1)]
public class SystemProcess : INetObject
{
  // 省略字段定义   
}

/// <summary>
/// 二进制序列化测试
/// </summary>
[Fact]
public void Test_SerializeToBytes_Success()
{
    var buffer = SerializeHelper.SerializeByNative(_codeWFObject, 1);
    _testOutputHelper.WriteLine($"序列化后二进制长度：{buffer.Length}");

    var deserializeObj = SerializeHelper.DeserializeByNative<SystemProcess>(buffer);
    Assert.Equal("码界工坊", deserializeObj.Name);
}

[NetHead(1, 2)]
public class SystemProcess2 : INetObject
{
    public int PID { get; set; }
    public string? Name { get; set; }
    public string? Publisher { get; set; }
    public string? CommandLine { get; set; }
    public float CPU { get; set; }
    public float Memory { get; set; }
    public float Disk { get; set; }
    public float Network { get; set; }
    public float GPU { get; set; }
    public byte GPUEngine { get; set; }
    public byte PowerUsage { get; set; }
    public byte PowerUsageTrend { get; set; }
    public byte Type { get; set; }
    public byte Status { get; set; }
}

/// <summary>
/// 普通优化字段数据类型
/// </summary>
private SystemProcess2 _codeWFObject2 = new SystemProcess2()
{
    PID = 10565,
    Name = "码界工坊",
    Publisher = "沙漠尽头的狼",
    CommandLine = "dotnet CodeWF.Tools.dll",
    CPU = 2.3f,
    Memory = 0.1f,
    Disk = 0.1f,
    Network = 0,
    GPU = 2.2f,
    GPUEngine = 1,
    PowerUsage = 1,
    PowerUsageTrend = 0,
    Type = 0,
    Status = 1
};

/// <summary>
/// 二进制序列化测试
/// </summary>
[Fact]
public void Test_SerializeToBytes2_Success()
{
    var buffer = SerializeHelper.SerializeByNative(_codeWFObject2, 1);
    _testOutputHelper.WriteLine($"序列化后二进制长度：{buffer.Length}");

    var deserializeObj = SerializeHelper.DeserializeByNative<SystemProcess2>(buffer);
    Assert.Equal("码界工坊", deserializeObj.Name);
    Assert.Equal(2.2f, deserializeObj.GPU);
}

[NetHead(1, 3)]
public class SystemProcess3 : INetObject
{
    public int PID { get; set; }
    public string? Name { get; set; }
    public string? Publisher { get; set; }
    public string? CommandLine { get; set; }
    private byte[]? _data;
    /// <summary>
    /// 序列化，这是实际需要序列化的数据
    /// </summary>
    public byte[]? Data
    {
        get => _data;
        set
        {
            _data = value;

            // 这是关键：在反序列化将byte转换为对象，方便程序中使用（位域操作）
            _processData = _data?.ToFieldObject<SystemProcessData>();
        }
    }

    private SystemProcessData? _processData;

    /// <summary>
    /// 进程数据，添加NetIgnoreMember在序列化会忽略
    /// </summary>
    [NetIgnoreMember]
    public SystemProcessData? ProcessData
    {
        get => _processData;
        set
        {
            _processData = value;

            // 这里关键：将对象转换为byte[](位域序列化操作)
            _data = _processData?.FieldObjectBuffer();
        }
    }
}

public record SystemProcessData
{
    [NetFieldOffset(0, 10)] public short CPU { get; set; }
    [NetFieldOffset(10, 10)] public short Memory { get; set; }
    [NetFieldOffset(20, 10)] public short Disk { get; set; }
    [NetFieldOffset(30, 10)] public short Network { get; set; }
    [NetFieldOffset(40, 10)] public short GPU { get; set; }
    [NetFieldOffset(50, 1)] public byte GPUEngine { get; set; }
    [NetFieldOffset(51, 3)] public byte PowerUsage { get; set; }
    [NetFieldOffset(54, 3)] public byte PowerUsageTrend { get; set; }
    [NetFieldOffset(57, 1)] public byte Type { get; set; }
    [NetFieldOffset(58, 2)] public byte Status { get; set; }
}

/// <summary>
/// 极限优化字段数据类型
/// </summary>
private SystemProcess3 _codeWFObject3 = new SystemProcess3()
{
    PID = 10565,
    Name = "码界工坊",
    Publisher = "沙漠尽头的狼",
    CommandLine = "dotnet CodeWF.Tools.dll",
    ProcessData = new SystemProcessData()
    {
        CPU = 23,
        Memory = 1,
        Disk = 1,
        Network = 0,
        GPU = 22,
        GPUEngine = 1,
        PowerUsage = 1,
        PowerUsageTrend = 0,
        Type = 0,
        Status = 1
    }
};

/// <summary>
/// 二进制极限序列化测试
/// </summary>
[Fact]
public void Test_SerializeToBytes3_Success()
{
    var buffer = SerializeHelper.SerializeByNative(_codeWFObject3, 1);
    _testOutputHelper.WriteLine($"序列化后二进制长度：{buffer.Length}");

    var deserializeObj = SerializeHelper.DeserializeByNative<SystemProcess3>(buffer);
    Assert.Equal("码界工坊", deserializeObj.Name);
    Assert.Equal(23, deserializeObj.ProcessData.CPU);
    Assert.Equal(1, deserializeObj.ProcessData.PowerUsage);
}

public partial class SerializeHelper
{
    public static byte[] FieldObjectBuffer<T>(this T obj) where T : class
    {
        var properties = typeof(T).GetProperties();
        var totalSize = 0;

        // 计算总的bit长度
        foreach (var property in properties)
        {
            if (!Attribute.IsDefined(property, typeof(NetFieldOffsetAttribute)))
            {
                continue;
            }

            var offsetAttribute =
                (NetFieldOffsetAttribute)property.GetCustomAttribute(typeof(NetFieldOffsetAttribute))!;
            totalSize = Math.Max(totalSize, offsetAttribute.Offset + offsetAttribute.Size);
        }

        var bufferLength = (int)Math.Ceiling((double)totalSize / 8);
        var buffer = new byte[bufferLength];

        foreach (var property in properties)
        {
            if (!Attribute.IsDefined(property, typeof(NetFieldOffsetAttribute)))
            {
                continue;
            }

            var offsetAttribute =
                (NetFieldOffsetAttribute)property.GetCustomAttribute(typeof(NetFieldOffsetAttribute))!;
            dynamic value = property.GetValue(obj)!; // 使用dynamic类型动态获取属性值
            SetBitValue(ref buffer, value, offsetAttribute.Offset, offsetAttribute.Size);
        }

        return buffer;
    }

    public static T ToFieldObject<T>(this byte[] buffer) where T : class, new()
    {
        var obj = new T();
        var properties = typeof(T).GetProperties();

        foreach (var property in properties)
        {
            if (!Attribute.IsDefined(property, typeof(NetFieldOffsetAttribute)))
            {
                continue;
            }

            var offsetAttribute =
                (NetFieldOffsetAttribute)property.GetCustomAttribute(typeof(NetFieldOffsetAttribute))!;
            dynamic value = GetValueFromBit(buffer, offsetAttribute.Offset, offsetAttribute.Size,
                property.PropertyType);
            property.SetValue(obj, value);
        }

        return obj;
    }

    /// <summary>
    /// 将值按位写入buffer
    /// </summary>
    /// <param name="buffer"></param>
    /// <param name="value"></param>
    /// <param name="offset"></param>
    /// <param name="size"></param>
    private static void SetBitValue(ref byte[] buffer, int value, int offset, int size)
    {
        var mask = (1 << size) - 1;
        buffer[offset / 8] |= (byte)((value & mask) << (offset % 8));
        if (offset % 8 + size > 8)
        {
            buffer[offset / 8 + 1] |= (byte)((value & mask) >> (8 - offset % 8));
        }
    }

    /// <summary>
    /// 从buffer中按位读取值
    /// </summary>
    /// <param name="buffer"></param>
    /// <param name="offset"></param>
    /// <param name="size"></param>
    /// <param name="propertyType"></param>
    /// <returns></returns>
    private static dynamic GetValueFromBit(byte[] buffer, int offset, int size, Type propertyType)
    {
        var mask = (1 << size) - 1;
        var bitValue = (buffer[offset / 8] >> (offset % 8)) & mask;
        if (offset % 8 + size > 8)
        {
            bitValue |= (buffer[offset / 8 + 1] << (8 - offset % 8)) & mask;
        }

        dynamic result = Convert.ChangeType(bitValue, propertyType); // 根据属性类型进行转换
        return result;
    }
}