[Openmcl-devel] Carbon FFI: How can I debug this?

David Steuber david at david-steuber.com
Wed Dec 29 18:43:26 UTC 2004

On Dec 29, 2004, at 9:53 AM, Takehiko Abe wrote:

> David Steuber wrote:
>> If I have a MACPTR that holds a CFStringRef, how can I get a MACPTR
>> that holds the CFStringRef* that points to it?
> (rlet ((ptr :pointer))
>   (%put-ptr ptr macptr-for-cfstring)
>   ...)
> or
> (rlet ((ptr :pointer macptr-for-cfstring)) ...)

This put me on the right track:

       (with-cfstring (text (format nil "~,2F" travel-time))
         (rlet ((&text (:* :<cfs>tring<r>ef) text))
           (#_SetControlData (ccl::%get-ptr travel-time-field) 
#$kControlEntireControl #$kControlEditTextCFStringTag
:<cfs>tring<r>ef :bytes) &text)))


Thank you!  You made my whole day.

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