private static System.DateTime FromByteArrayImpl(byte[] bytes)
{
if (bytes.Length != TypeLengthInBytes)
{
throw new ArgumentOutOfRangeException(nameof(bytes), bytes.Length,
$"Parsing a DateTimeLong requires exactly 12 bytes of input data, input data is {bytes.Length} bytes long.");
}
var year = AssertRangeInclusive(Word.FromBytes(bytes[1], bytes[0]), 1970, 2262, "year");
var month = AssertRangeInclusive(bytes[2], 1, 12, "month");
var day = AssertRangeInclusive(bytes[3], 1, 31, "day of month");
var dayOfWeek = AssertRangeInclusive(bytes[4], 1, 7, "day of week");
var hour = AssertRangeInclusive(bytes[5], 0, 23, "hour");
var minute = AssertRangeInclusive(bytes[6], 0, 59, "minute");
var second = AssertRangeInclusive(bytes[7], 0, 59, "second");
;
var nanoseconds = AssertRangeInclusive <uint>(DWord.FromBytes(bytes[11], bytes[10], bytes[9], bytes[8]), 0,
999999999, "nanoseconds");
var time = new System.DateTime(year, month, day, hour, minute, second);
return(time.AddTicks(nanoseconds / 100));
}
/// <summary>
/// Converts a S7 DWord to double
/// </summary>
public static double FromDWord(UInt32 value)
{
byte[] b = DWord.ToByteArray(value);
double d = FromByteArray(b);
return(d);
}
/// <summary>
/// Converts a S7 DWord to float
/// </summary>
public static float FromDWord(UInt32 value)
{
byte[] b = DWord.ToByteArray(value);
float d = FromByteArray(b);
return(d);
}
/// <summary>
/// Converts a <see cref="T:System.DateTime" /> value to a byte array.
/// </summary>
/// <param name="dateTime">The DateTime value to convert.</param>
/// <returns>A byte array containing the S7 DateTimeLong representation of <paramref name="dateTime" />.</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// Thrown when the value of
/// <paramref name="dateTime" /> is before <see cref="P:SpecMinimumDateTime" />
/// or after <see cref="P:SpecMaximumDateTime" />.
/// </exception>
public static byte[] ToByteArray(System.DateTime dateTime)
{
if (dateTime < SpecMinimumDateTime)
{
throw new ArgumentOutOfRangeException(nameof(dateTime), dateTime,
$"Date time '{dateTime}' is before the minimum '{SpecMinimumDateTime}' supported in S7 DateTimeLong representation.");
}
if (dateTime > SpecMaximumDateTime)
{
throw new ArgumentOutOfRangeException(nameof(dateTime), dateTime,
$"Date time '{dateTime}' is after the maximum '{SpecMaximumDateTime}' supported in S7 DateTimeLong representation.");
}
var stream = new MemoryStream(TypeLengthInBytes);
// Convert Year
stream.Write(Word.ToByteArray(Convert.ToUInt16(dateTime.Year)), 0, 2);
// Convert Month
stream.WriteByte(Convert.ToByte(dateTime.Month));
// Convert Day
stream.WriteByte(Convert.ToByte(dateTime.Day));
// Convert WeekDay. NET DateTime starts with Sunday = 0, while S7DT has Sunday = 1.
stream.WriteByte(Convert.ToByte(dateTime.DayOfWeek + 1));
// Convert Hour
stream.WriteByte(Convert.ToByte(dateTime.Hour));
// Convert Minutes
stream.WriteByte(Convert.ToByte(dateTime.Minute));
// Convert Seconds
stream.WriteByte(Convert.ToByte(dateTime.Second));
// Convert Nanoseconds. Net DateTime has a representation of 1 Tick = 100ns.
// Thus First take the ticks Mod 1 Second (1s = 10'000'000 ticks), and then Convert to nanoseconds.
stream.Write(DWord.ToByteArray(Convert.ToUInt32(dateTime.Ticks % 10000000 * 100)), 0, 4);
return(stream.ToArray());
}
/// <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;
}
}
return(structValue);
}
/// <summary>
/// Creates a byte array depending on the struct type.
/// </summary>
/// <param name="structValue">The struct object</param>
/// <returns>A byte array or null if fails.</returns>
public static byte[] ToBytes(object structValue)
{
Type type = structValue.GetType();
int size = Struct.GetStructSize(type);
byte[] bytes = new byte[size];
byte[] bytes2 = null;
int bytePos = 0;
int bitPos = 0;
double numBytes = 0.0;
System.Reflection.FieldInfo[] infos = type.GetFields();
foreach (System.Reflection.FieldInfo info in infos)
{
bytes2 = null;
switch (info.FieldType.Name)
{
case "Boolean":
// get the value
bytePos = (int)Math.Floor(numBytes);
bitPos = (int)((numBytes - (double)bytePos) / 0.125);
if ((bool)info.GetValue(structValue))
{
bytes[bytePos] |= (byte)Math.Pow(2, bitPos); // is true
}
else
{
bytes[bytePos] &= (byte)(~(byte)Math.Pow(2, bitPos)); // is false
}
numBytes += 0.125;
break;
case "Byte":
numBytes = (int)Math.Ceiling(numBytes);
bytePos = (int)numBytes;
bytes[bytePos] = (byte)info.GetValue(structValue);
numBytes++;
break;
case "Int16":
bytes2 = Int.ToByteArray((Int16)info.GetValue(structValue));
break;
case "UInt16":
bytes2 = Word.ToByteArray((UInt16)info.GetValue(structValue));
break;
case "Int32":
bytes2 = DInt.ToByteArray((Int32)info.GetValue(structValue));
break;
case "UInt32":
bytes2 = DWord.ToByteArray((UInt32)info.GetValue(structValue));
break;
case "Double":
bytes2 = Double.ToByteArray((double)info.GetValue(structValue));
break;
}
if (bytes2 != null)
{
// add them
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
bytePos = (int)numBytes;
for (int bCnt = 0; bCnt < bytes2.Length; bCnt++)
{
bytes[bytePos + bCnt] = bytes2[bCnt];
}
numBytes += bytes2.Length;
}
}
return(bytes);
}
/// <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;
}
}
}
/// <summary>
/// Creates a byte array depending on the struct type.
/// </summary>
/// <param name="sourceClass">The struct object</param>
/// <returns>A byte array or null if fails.</returns>
public static byte[] ToBytes(object sourceClass)
{
Type type = sourceClass.GetType();
int size = GetClassSize(type);
byte[] bytes = new byte[size];
byte[] bytes2 = null;
int bytePos = 0;
int bitPos = 0;
double numBytes = 0.0;
var properties = sourceClass.GetType().GetProperties();
foreach (var property in properties)
{
bytes2 = null;
switch (property.PropertyType.Name)
{
case "Boolean":
// get the value
bytePos = (int)Math.Floor(numBytes);
bitPos = (int)((numBytes - (double)bytePos) / 0.125);
if ((bool)property.GetValue(sourceClass, null))
{
bytes[bytePos] |= (byte)Math.Pow(2, bitPos); // is true
}
else
{
bytes[bytePos] &= (byte)(~(byte)Math.Pow(2, bitPos)); // is false
}
numBytes += 0.125;
break;
case "Byte":
numBytes = (int)Math.Ceiling(numBytes);
bytePos = (int)numBytes;
bytes[bytePos] = (byte)property.GetValue(sourceClass, null);
numBytes++;
break;
case "Int16":
bytes2 = Int.ToByteArray((Int16)property.GetValue(sourceClass, null));
break;
case "UInt16":
bytes2 = Word.ToByteArray((UInt16)property.GetValue(sourceClass, null));
break;
case "Int32":
bytes2 = DInt.ToByteArray((Int32)property.GetValue(sourceClass, null));
break;
case "UInt32":
bytes2 = DWord.ToByteArray((UInt32)property.GetValue(sourceClass, null));
break;
case "Double":
bytes2 = Double.ToByteArray((double)property.GetValue(sourceClass, null));
break;
}
if (bytes2 != null)
{
// add them
numBytes = Math.Ceiling(numBytes);
if ((numBytes / 2 - Math.Floor(numBytes / 2.0)) > 0)
{
numBytes++;
}
bytePos = (int)numBytes;
for (int bCnt = 0; bCnt < bytes2.Length; bCnt++)
{
bytes[bytePos + bCnt] = bytes2[bCnt];
}
numBytes += bytes2.Length;
}
}
return(bytes);
}
/// <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;
}
}
}
