MSO7000X/Uestc.Auto6.Dso.Hardware.Calibration.Data.Base/Helper.cs

using System;
using System.Runtime.InteropServices;

namespace Uestc.Auto6.Dso.Hardware.Calibration.Data.Base
{
    public class Helper
    {
        #region Marshal
        internal static byte[] StructToBytes(object structObj)
        {
            int size = Marshal.SizeOf(structObj);
            IntPtr buffer = Marshal.AllocHGlobal(size);
            try
            {
                Marshal.StructureToPtr(structObj, buffer, false);
                byte[] bytes = new byte[size];
                Marshal.Copy(buffer, bytes, 0, size);
                return bytes;
            }
            finally
            {
                Marshal.FreeHGlobal(buffer);
            }
        }


        internal static T? BytesToStruct<T>(byte[] bytes, int startIndex, Type strcutType)
        {
            int size = Marshal.SizeOf(strcutType);
            T? data;
            IntPtr buffer = Marshal.AllocHGlobal(size);
            try
            {
                Marshal.Copy(bytes, startIndex, buffer, size);
                data=(T?)Marshal.PtrToStructure(buffer, strcutType);
            }
            catch
            {
                data = (T?)Activator.CreateInstance(strcutType, new object[] { });
            }
            finally
            {
                Marshal.FreeHGlobal(buffer);
            }
            return data;
        }
        #endregion

        public static ICaliData? GetICaliData(CaliDataType caliDataType)
        {
            return caliDataType switch
            {
                CaliDataType.PhyChannel => ChannelParams.Default,
                CaliDataType.TiAdc_SyncSampleClock => TiAdc_SyncSampleClock.Default,
                CaliDataType.TiAdc_PhaseOffsetGain => TiAdc_PhaseOffsetGain.Default,
                CaliDataType.CoefficientsTable_AFC => CoefficientsTable_AFC.Default,
                CaliDataType.CoefficientsTable_Interpolation => CoefficientsTable_Interpolation.Default,
                CaliDataType.CoefficientsTable_TiAdc => CoefficientsTable_TiAdc.Default,
                CaliDataType.Misc =>MiscData.Default,
                _ => null
            };
        }
        public static ICoefficientsTable? GetICoefficientsTable(CaliDataType caliDataType)
        {
            return caliDataType switch
            {
                CaliDataType.CoefficientsTable_AFC => CoefficientsTable_AFC.Default,
                CaliDataType.CoefficientsTable_Interpolation => CoefficientsTable_Interpolation.Default,
                CaliDataType.CoefficientsTable_TiAdc => CoefficientsTable_TiAdc.Default,
                _ => null
            };
        }
    }
}