Passing a Char to a Varchar in RPGLE Procedure Interface

I was wondering if there is any way that a Char value can be passed to a sub-procedure such that it ends up as a Varchar inside the procedure.
In other words, the parameter interface is defined as Varchar(1024), but the value passed is defined as Char(512). I want to be able to invoke the procedure from both RPGLE and CLLE, and as CLLE does not have a native VARCHAR definition I was hoping to be able to get the parameter passing mechanism to do this on-the-fly.

I know how to create a VARCHAR like value in CL, but don't want fellow developers to have to go through this pain to use my sub-procedure..

TIA...


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