static void MarshalValue(object value, out int size, out IntPtr data)
{
if (value is string)
{
data = Marshal.StringToBSTR(value as string);
size = 0;
}
else if (value is char)
{
BlittableChar c = (BlittableChar)((char)value);
size = Marshal.SizeOf(c);
data = Marshal.AllocCoTaskMem(size);
Marshal.StructureToPtr(c, data, false);
}
else if (value is bool)
{
BlittableBoolean b = (BlittableBoolean)((bool)value);
size = Marshal.SizeOf(b);
data = Marshal.AllocCoTaskMem(size);
Marshal.StructureToPtr(b, data, false);
}
else
{
size = Marshal.SizeOf(value);
data = Marshal.AllocCoTaskMem(size);
Marshal.StructureToPtr(value, data, false);
}
}
public void CharTest()
{
const char value = 'x';
BlittableChar blittable = (BlittableChar)value;
Assert.Equal(value, blittable);
}
public void CharTest()
{
const char value = 'x';
var blittable = new BlittableChar(value);
Assert.Equal(value, blittable);
}
private bool UnmarshalResult(int dataTypeId, IntPtr dataPtr, out object result)
{
if (dataTypeId < 0)
{
result = new ContextVariable(m_opaque, dataPtr);
return(true);
}
if (dataTypeId == 0) // special case for null object
{
result = null;
return(true);
}
if (dataTypeId >= basicTypes.Length)
{
result = null;
return(false);
}
Type dataType = Type.GetType(basicTypes[dataTypeId]);
if (dataType == typeof(string))
{
if (dataPtr == IntPtr.Zero)
{
result = string.Empty;
return(true);
}
result = Marshal.PtrToStringBSTR(dataPtr);
Marshal.FreeBSTR(dataPtr);
return(true);
}
if (dataType == typeof(char))
{
BlittableChar c = Marshal.PtrToStructure <BlittableChar>(dataPtr);
Marshal.FreeCoTaskMem(dataPtr);
result = (char)c;
return(true);
}
if (dataType == typeof(bool))
{
BlittableBoolean b = Marshal.PtrToStructure <BlittableBoolean>(dataPtr);
Marshal.FreeCoTaskMem(dataPtr);
result = (bool)b;
return(true);
}
result = Marshal.PtrToStructure(dataPtr, dataType);
Marshal.FreeCoTaskMem(dataPtr);
return(true);
}