Cast or convert AnsiString to NSMutableData in Objective Pascal unit over Cocoa classes

Question

Writing a Lazarus unit with Objective Pascal to interface with Cocoa classes on Mac OS X. I want to pass an AnsiString from the FreePascal caller to a Cocoa class requiring an NSMutableData parameter value. How can I cast or convert the AnsiString data to NSMutableData data, coding in the Objective Pascal dialect?

Thanks for your consideration!

Answer 1

Well duh...

MyMutableData := MyMutableData.appendBytes(@MyAnsiString[1], SizeOfString);

The appendBytes method of NSMutableData takes a pointer, so @MyAnsiString[1] provides it.

The [1] bypasses the length and counter info prepended to the actual ansistring.