public void Write(System.Char data)
{
unsafe
{
System.Char *pPtr = &data;
Write((IntPtr)pPtr, sizeof(System.Char));
}
}
// Update a string and return its size
private UInt32 UpdateStringAndReturnSize(System.Char *value, UInt32 maxElementCount, string stringAsValue)
{
byte[] nameAsBuffer = ASCIIEncoding.ASCII.GetBytes(stringAsValue);
UInt32 valueElementCount = maxElementCount;
if (nameAsBuffer.Length < valueElementCount)
{
valueElementCount = Convert.ToUInt32(nameAsBuffer.Length);
}
Marshal.Copy(nameAsBuffer, 0, (IntPtr)value, Convert.ToInt32(valueElementCount));
return(valueElementCount);
}
/// <summary>
/// Converts the value to its equivalent string representation and puts it into StringBuilder.
/// Returns into StringBuilder:
/// The string representation of the value of this instance, consisting of a
/// negative sign if the value is negative, and a sequence of digits ranging
/// from 0 to 9 with no leading zeroes.
/// </summary>
public unsafe static void ToStringBuilder(
SmartInt value,
System.Int32 ndp,
System.Text.StringBuilder sb
)
{
const System.Int32 vzero = (System.Int32) '0';
if (value == SmartInt.BadValue)
{
sb.Append("BadValue");
return;
}
if (value == 0)
{
sb.Append('0');
return;
}
// 12345678911
System.Char *buffer = stackalloc System.Char[10];
System.Int32 v1, v2;
System.Int32 ndigits = 10;
if (value < 0)
{
sb.Append("-");
v1 = -value;
}
else
{
v1 = value;
}
for (int i = 9; i >= 0; i--)
{
if (v1 > 0)
{
ndigits--;
}
v2 = v1 / 10;
buffer[i] = (System.Char)(vzero + v1 - (((v2 << 2) + v2) << 1));
v1 = v2;
}
int leading_zeros = ndp - 10 + ndigits;
while (leading_zeros > 0)
{
sb.Append('0');
leading_zeros--;
}
for (int i = ndigits; i < 10; i++)
{
sb.Append(buffer[i]);
}
return;
}
// Callback used by the BACnet Stack to set Charstring property values to the user
public bool CallbackGetPropertyCharString(UInt32 deviceInstance, UInt16 objectType, UInt32 objectInstance, UInt32 propertyIdentifier, System.Char *value, UInt32 *valueElementCount, UInt32 maxElementCount, System.Byte encodingType, bool useArrayIndex, UInt32 propertyArrayIndex)
{
Console.WriteLine("FYI: Request for CallbackGetPropertyCharString. objectType={0}, objectInstance={1}, propertyIdentifier={2}, propertyArrayIndex={3}", objectType, objectInstance, propertyIdentifier, propertyArrayIndex);
switch (objectType)
{
case CASBACnetStackAdapter.OBJECT_TYPE_DEVICE:
if (deviceInstance == database.Device.instance && objectInstance == database.Device.instance)
{
if (propertyIdentifier == CASBACnetStackAdapter.PROPERTY_IDENTIFIER_OBJECT_NAME)
{
*valueElementCount = UpdateStringAndReturnSize(value, maxElementCount, database.Device.name);
return(true);
}
else if (propertyIdentifier == CASBACnetStackAdapter.PROPERTY_IDENTIFIER_MODEL_NAME)
{
*valueElementCount = UpdateStringAndReturnSize(value, maxElementCount, database.Device.modelName);
return(true);
}
else if (propertyIdentifier == CASBACnetStackAdapter.PROPERTY_IDENTIFIER_VENDOR_NAME)
{
*valueElementCount = UpdateStringAndReturnSize(value, maxElementCount, database.Device.vendorName);
return(true);
}
else if (propertyIdentifier == CASBACnetStackAdapter.PROPERTY_IDENTIFIER_APPLICATIONSOFTWAREVERSION)
{
string version = APPLICATION_VERSION + "." + CIBuildVersion.CIBUILDNUMBER;
* valueElementCount = UpdateStringAndReturnSize(value, maxElementCount, version);
return(true);
}
else if (propertyIdentifier == 512 + 1)
{
string version = database.Device.proprietaryProperty513;
* valueElementCount = UpdateStringAndReturnSize(value, maxElementCount, version);
return(true);
}
else if (propertyIdentifier == 512 + 2)
{
string version = database.Device.proprietaryProperty514;
* valueElementCount = UpdateStringAndReturnSize(value, maxElementCount, version);
return(true);
}
}
break;
default:
break;
}
Console.WriteLine(" FYI: Not implmented. propertyIdentifier={0}", propertyIdentifier);
return(false); // Could not handle this request.
}
// Read string from char pointer
private string GetStringFromCharPointer(System.Char *value, UInt32 maxElementCount, Byte encodingType)
{
byte[] nameAsBuffer = new Byte[maxElementCount];
Marshal.Copy((IntPtr)value, nameAsBuffer, 0, Convert.ToInt32(maxElementCount));
return(ASCIIEncoding.ASCII.GetString(nameAsBuffer));
}
