private Object MarshalDeviceProperty(IntPtr source, Int32 length, UInt32 type)
{
// TODO: add other types; now covers only all types that are mentioned in devpkey.h
switch (type)
{
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_UINT32:
return((UInt32)Marshal.ReadInt32(source));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_GUID:
return(MarshalEx.ReadGuid(source, length));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_FILETIME:
return(MarshalEx.ReadFileTime(source));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_BOOLEAN:
return(Marshal.ReadByte(source) != 0);
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_STRING:
return(Marshal.PtrToStringUni(source));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_SECURITY_DESCRIPTOR:
return(MarshalEx.ReadSecurityDescriptor(source, length));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_SECURITY_DESCRIPTOR_STRING:
return(Marshal.PtrToStringUni(source));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_BINARY:
return(MarshalEx.ReadByteArray(source, length));
case UsbDeviceWinApi.DevicePropertyTypes.DEVPROP_TYPE_STRING_LIST:
return(MarshalEx.ReadMultiSzStringList(source, length));
default:
return(null);
}
}
// TODO: not tested
public static RawSecurityDescriptor ReadSecurityDescriptor(IntPtr source, Int32 length)
{
Byte[] byteArray = MarshalEx.ReadByteArray(source, 0, length);
return(new RawSecurityDescriptor(byteArray, 0));
}
public static Guid ReadGuid(IntPtr source, Int32 length)
{
Byte[] byteArray = MarshalEx.ReadByteArray(source, 0, length);
return(new Guid(byteArray));
}
public static Byte[] ReadByteArray(IntPtr source, Int32 length)
{
return(MarshalEx.ReadByteArray(source, 0, length));
}
