Plugins/Drivers/DriverSiemensS7/S7.Net/Types/Struct.cs

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using System;
using System.Linq;
using System.Reflection;

namespace S7.Net.Types
{
    /// <summary>
    /// Contains the method to convert a C# struct to S7 data types
    /// </summary>
    public static class Struct
    {
        /// <summary>
        /// Gets the size of the struct in bytes.
        /// </summary>
        /// <param name="structType">the type of the struct</param>
        /// <returns>the number of bytes</returns>
        public static int GetStructSize(Type structType)
        {
            double numBytes = 0.0;

            var infos = structType
#if NETSTANDARD1_3
                .GetTypeInfo().DeclaredFields;
#else
                .GetFields();
#endif

            foreach (var info in infos)
            {
                switch (info.FieldType.Name)
                {
                    case "Boolean":
                        numBytes += 0.125;
                        break;
                    case "Byte":
                        numBytes = Math.Ceiling(numBytes);
                        numBytes++;
                        break;
                    case "Int16":
                    case "UInt16":
                        numBytes = Math.Ceiling(numBytes);
                        if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
                            numBytes++;
                        numBytes += 2;
                        break;
                    case "Int32":
                    case "UInt32":
                        numBytes = Math.Ceiling(numBytes);
                        if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
                            numBytes++;
                        numBytes += 4;
                        break;
                    case "Single":
                        numBytes = Math.Ceiling(numBytes);
                        if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
                            numBytes++;
                        numBytes += 4;
                        break;
                    case "Double":
                        numBytes = Math.Ceiling(numBytes);