/// <summary>
/// Creates a struct of a specified type by an array of bytes.
/// </summary>
/// <param name="structType">The struct type</param>
/// <param name="bytes">The array of bytes</param>
/// <returns>The object depending on the struct type or null if fails(array-length != struct-length</returns>
public static object FromBytes(Type structType, byte[] bytes)
{
if (bytes == null)
{
return(null);
}
if (bytes.Length != GetStructSize(structType))
{
return(null);
}
// and decode it
int bytePos = 0;
int bitPos = 0;
double numBytes = 0.0;
object structValue = Activator.CreateInstance(structType);
System.Reflection.FieldInfo[] infos = structValue.GetType().GetFields();
foreach (System.Reflection.FieldInfo info in infos)
{
switch (info.FieldType.Name)
{
case "Boolean":
// get the value
bytePos = (int)Math.Floor(numBytes);
bitPos = (int)((numBytes - (double)bytePos) / 0.125);
if ((bytes[bytePos] & (int)Math.Pow(2, bitPos)) != 0)
{
info.SetValue(structValue, true);
}
else
{
info.SetValue(structValue, false);
}
numBytes += 0.125;
break;
case "Byte":
numBytes = Math.Ceiling(numBytes);
info.SetValue(structValue, (byte)(bytes[(int)numBytes]));
numBytes++;
break;
case "Int16":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
ushort source = Word.FromBytes(bytes[(int)numBytes + 1], bytes[(int)numBytes]);
info.SetValue(structValue, source.ConvertToShort());
numBytes += 2;
break;
case "UInt16":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
info.SetValue(structValue, Word.FromBytes(bytes[(int)numBytes + 1],
bytes[(int)numBytes]));
numBytes += 2;
break;
case "Int32":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
uint sourceUInt = DWord.FromBytes(bytes[(int)numBytes + 3],
bytes[(int)numBytes + 2],
bytes[(int)numBytes + 1],
bytes[(int)numBytes + 0]);
info.SetValue(structValue, sourceUInt.ConvertToInt());
numBytes += 4;
break;
case "UInt32":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
info.SetValue(structValue, DWord.FromBytes(bytes[(int)numBytes],
bytes[(int)numBytes + 1],
bytes[(int)numBytes + 2],
bytes[(int)numBytes + 3]));
numBytes += 4;
break;
case "Double":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
info.SetValue(structValue, Double.FromByteArray(new byte[] { bytes[(int)numBytes],
bytes[(int)numBytes + 1],
bytes[(int)numBytes + 2],
bytes[(int)numBytes + 3] }));
numBytes += 4;
break;
default:
var buffer = new byte[GetStructSize(info.FieldType)];
if (buffer.Length == 0)
{
continue;
}
Buffer.BlockCopy(bytes, (int)Math.Ceiling(numBytes), buffer, 0, buffer.Length);
info.SetValue(structValue, FromBytes(info.FieldType, buffer));
numBytes += buffer.Length;
break;
}
}
return(structValue);
}
/// <summary>
/// Creates a struct of a specified type by an array of bytes.
/// </summary>
/// <param name="sourceClass"></param>
/// <param name="classType">The struct type</param>
/// <param name="bytes">The array of bytes</param>
/// <returns>The object depending on the struct type or null if fails(array-length != struct-length</returns>
public static void FromBytes(object sourceClass, Type classType, byte[] bytes)
{
if (bytes == null)
{
return;
}
if (bytes.Length != GetClassSize(classType))
{
return;
}
// and decode it
int bytePos = 0;
int bitPos = 0;
double numBytes = 0.0;
var properties = sourceClass.GetType().GetProperties();
foreach (var property in properties)
{
switch (property.PropertyType.Name)
{
case "Boolean":
// get the value
bytePos = (int)Math.Floor(numBytes);
bitPos = (int)((numBytes - (double)bytePos) / 0.125);
if ((bytes[bytePos] & (int)Math.Pow(2, bitPos)) != 0)
{
property.SetValue(sourceClass, true, null);
}
else
{
property.SetValue(sourceClass, false, null);
}
numBytes += 0.125;
break;
case "Byte":
numBytes = Math.Ceiling(numBytes);
property.SetValue(sourceClass, (byte)(bytes[(int)numBytes]), null);
numBytes++;
break;
case "Int16":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
ushort source = Word.FromBytes(bytes[(int)numBytes + 1], bytes[(int)numBytes]);
property.SetValue(sourceClass, source.ConvertToShort(), null);
numBytes += 2;
break;
case "UInt16":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
property.SetValue(sourceClass, Word.FromBytes(bytes[(int)numBytes + 1], bytes[(int)numBytes]), null);
numBytes += 2;
break;
case "Int32":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
uint sourceUInt = DWord.FromBytes(bytes[(int)numBytes + 3],
bytes[(int)numBytes + 2],
bytes[(int)numBytes + 1],
bytes[(int)numBytes + 0]);
property.SetValue(sourceClass, sourceUInt.ConvertToInt(), null);
numBytes += 4;
break;
case "UInt32":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
property.SetValue(sourceClass, DWord.FromBytes(bytes[(int)numBytes],
bytes[(int)numBytes + 1],
bytes[(int)numBytes + 2],
bytes[(int)numBytes + 3]), null);
numBytes += 4;
break;
case "Double":
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
// hier auswerten
property.SetValue(sourceClass, Double.FromByteArray(new byte[] { bytes[(int)numBytes],
bytes[(int)numBytes + 1],
bytes[(int)numBytes + 2],
bytes[(int)numBytes + 3] }), null);
numBytes += 4;
break;
default:
var buffer = new byte[GetClassSize(property.PropertyType)];
if (buffer.Length == 0)
{
continue;
}
Buffer.BlockCopy(bytes, (int)Math.Ceiling(numBytes), buffer, 0, buffer.Length);
var propClass = Activator.CreateInstance(property.PropertyType);
FromBytes(propClass, property.PropertyType, buffer);
property.SetValue(sourceClass, propClass, null);
numBytes += buffer.Length;
break;
}
}
}
