private bool isBytesChangedAccordingToRule(byte[] bytes, MemoryRule rule, out IChangedDataContainer changedBytes)
{
if (rule.DataType == DataType.Decimal || rule.DataType == DataType.SignedInteger || rule.DataType == DataType.UnsignedInteger)
{
return(isNumberChangedAccordingToRule(bytes, rule, out changedBytes));
}
if (rule.DataType == DataType.Data)
{
return(isDataChangedAccordingToRule(bytes, rule, out changedBytes));
}
changedBytes = null;
return(false);
}
private bool isDataChangedAccordingToRule(byte[] bytes, MemoryRule rule, out IChangedDataContainer changedBytes)
{
ISet <long> changedBytesSet = new HashSet <long>();
var count = bytes.LongLength;
var sendAll = rule.TransferType == TransferType.AllBytes;
for (long i = 0; i < count; ++i)
{
if (rule.Bytes[i] != bytes[i])
{
if (rule.ChangeTrigger == ChangeTrigger.AnyChange ||
rule.ChangeTrigger == ChangeTrigger.FlagOn && (rule.Bytes[i] | bytes[i]) != rule.Bytes[i] ||
rule.ChangeTrigger == ChangeTrigger.FlagOff && (rule.Bytes[i] & bytes[i]) != rule.Bytes[i] ||
rule.ChangeTrigger == ChangeTrigger.Increase && rule.NumBytes == 1 && bytes[i] > rule.Bytes[i] ||
rule.ChangeTrigger == ChangeTrigger.Decrease && rule.NumBytes == 1 && bytes[i] < rule.Bytes[i])
{
changedBytesSet.Add(i);
if (sendAll)
{
break;
}
}
}
}
if (changedBytesSet.Count > 0)
{
if (sendAll)
{
changedBytes = new BytesContainer(bytes, rule.MemoryOffset64);
}
else
{
changedBytes = BytesDifferenceContainer.ChangedBytesFromIndexSet(rule.MemoryOffset64, changedBytesSet, bytes);
}
return(true);
}
else
{
changedBytes = null;
return(false);
}
}
public static IChangedDataContainer BuildChangedData(byte[] buffer)
{
if (buffer.Length == 0)
{
throw new Exception("Empty buffer");
}
if (buffer[0] > 2)
{
throw new Exception("Invalid ChangeDataType");
}
var type = (ChangeDataType)buffer[0];
IChangedDataContainer container = null;
if (type == ChangeDataType.Bytes)
{
container = new BytesContainer(new byte[0], 0);
container.FillFromNetworkBytes(buffer);
}
if (type == ChangeDataType.BytesDifference)
{
container = new BytesDifferenceContainer(0);
container.FillFromNetworkBytes(buffer);
}
if (type == ChangeDataType.NumberDifference)
{
container = new NumberDifferenceContainer(new byte[0], 0);
container.FillFromNetworkBytes(buffer);
}
if (container == null)
{
throw new Exception("Unable to build change data from supplied buffer");
}
return(container);
}
public IncomingMemoryData(UserInfo user, IChangedDataContainer change)
{
User = user;
ChangedData = change;
}
private bool isNumberChangedAccordingToRule(byte[] bytes, MemoryRule rule, out IChangedDataContainer changedBytes)
{
byte[] diff = null;
bool numbersChanged = false;
if (rule.DataType == DataType.Decimal)
{
if (bytes.Length == 4)
{
var ov = ByteParser.ParseFloat(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseFloat(bytes, rule.Endianness);
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
else if (bytes.Length == 8)
{
var ov = ByteParser.ParseDouble(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseDouble(bytes, rule.Endianness);
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
else
{
throw new Exception("Can not parse decimal. Expected 4 or 8 bytes");
}
}
else if (rule.DataType == DataType.SignedInteger || rule.DataType == DataType.UnsignedInteger)
{
bool signed = rule.DataType == DataType.SignedInteger;
if (bytes.Length == 1)
{
if (signed)
{
var ov = (sbyte)rule.Bytes[0];
var nv = (sbyte)bytes[0];
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
else
{
var ov = rule.Bytes[0];
var nv = bytes[0];
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
}
else if (bytes.Length == 2)
{
if (signed)
{
var ov = ByteParser.ParseShort(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseShort(bytes, rule.Endianness);
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
else
{
var ov = ByteParser.ParseUnsignedShort(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseUnsignedShort(bytes, rule.Endianness);
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
}
else if (bytes.Length == 4)
{
if (signed)
{
var ov = ByteParser.ParseInt(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseInt(bytes, rule.Endianness);
diff = BitConverter.GetBytes(nv - ov);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
else
{
var ov = ByteParser.ParseUnsignedInt(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseUnsignedInt(bytes, rule.Endianness);
long diff2 = (long)nv - (long)ov;
diff = BitConverter.GetBytes((int)diff2);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
}
else if (bytes.Length == 8)
{
if (signed)
{
var ov = ByteParser.ParseLong(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseLong(bytes, rule.Endianness);
long diff2 = (long)nv - (long)ov;
diff = BitConverter.GetBytes((int)diff2);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
else
{
var ov = ByteParser.ParseUnsignedLong(rule.Bytes, rule.Endianness);
var nv = ByteParser.ParseUnsignedLong(bytes, rule.Endianness);
long diff2 = (long)nv - (long)ov;
diff = BitConverter.GetBytes((int)diff2);
numbersChanged = (rule.ChangeTrigger == ChangeTrigger.AnyChange && !ov.Equals(nv) ||
rule.ChangeTrigger == ChangeTrigger.Decrease && ov > nv ||
rule.ChangeTrigger == ChangeTrigger.Increase && ov < nv);
}
}
else
{
throw new Exception("Can not parse number. Expected 1, 2, 4 or 8 bytes");
}
}
if (numbersChanged)
{
if (rule.TransferType == TransferType.AllBytes)
{
changedBytes = new BytesContainer(bytes, rule.MemoryOffset64);
return(true);
}
else
{
changedBytes = new NumberDifferenceContainer(diff, rule.MemoryOffset64);
return(true);
}
}
changedBytes = null;
return(false);
}
public MemoryChangedEventArgs(MemoryRule rule, IChangedDataContainer change)
{
MemoryRule = rule;
ChangedData = change;
}
