public static IntPtr ClassArrayToPtr <ClassType, InteropStructType>(
ClassType[] inputTypes,
Func <ClassType, DisposableCollection, InteropStructType> converter,
DisposableCollection disposableCollection,
out SizeT arrayCount)
{
if (inputTypes == null)
{
arrayCount = new SizeT(0);
return(IntPtr.Zero);
}
bool isEnum = typeof(InteropStructType).IsEnum;
Int32 sizeOfStruct = Marshal.SizeOf(isEnum ? Enum.GetUnderlyingType(typeof(InteropStructType)) : typeof(InteropStructType));
DisposableBuffer buffer = disposableCollection.Add(new DisposableBuffer(checked (sizeOfStruct * inputTypes.Length)));
IntPtr currentPtr = buffer.IntPtr;
foreach (ClassType inputType in inputTypes)
{
object structure = isEnum ? Convert.ChangeType(converter(inputType, disposableCollection), Enum.GetUnderlyingType(typeof(InteropStructType))) : (object)converter(inputType, disposableCollection);
Marshal.StructureToPtr(structure, currentPtr, fDeleteOld: false);
currentPtr = currentPtr.OffsetPF(sizeOfStruct);
}
arrayCount = new SizeT(inputTypes.Length);
return(buffer.IntPtr);
}
/// <summary>
/// Constructor for marshaling a UTF8 char* _to_ managed code. Requires an existing DisposableCollection to add a buffer to.
/// </summary>
public UTF8StringPtr(string str, DisposableCollection disposableCollection)
{
if (str == null)
{
this.pointer = IntPtr.Zero;
}
else
{
byte[] utf8Bytes = Converters.StringToNullTerminatedUTF8ByteArray(str);
DisposableBuffer buffer = new DisposableBuffer(utf8Bytes.Length);
Marshal.Copy(source: utf8Bytes, startIndex: 0, destination: buffer.IntPtr, length: utf8Bytes.Length);
disposableCollection.Add(buffer);
this.pointer = buffer.IntPtr;
}
}