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From: RMokady@acorn.co.uk (Ran Mokady)
Newsgroups: comp.sys.acorn
Subject: Re: Answer: Problem with procedures in BASIC
Message-ID: <7475@acorn.co.uk>
Date: 7 Jun 91 20:08:02 GMT
References: <8009@ecs.soton.ac.uk>
Sender: rmokady@acorn.co.uk
Distribution: comp
Organization: Acorn Computers Ltd, Cambridge, England
Lines: 54

In article <8009@ecs.soton.ac.uk> snb90@uk.ac.soton.ecs (Stewart Brodie) writes:

>Thank you for all the comments, but I have found the problem and
>corrected it. For those who are interested :
>
>  The fault is that my window name was TOO SHORT!!  In the PRM it states
>that:
>
>"If you use wildcards .. there must be enough space to put the full name
>of the template in memory"
>

  The PRM says (Page 1238)

Wimp_LoadTemplate   (SWI &400DB) 

On Entry:

   R1 = Pointer to user buffer for template.
   R2 = Pointer to workspace for indirected icons.
   R3 = Pointer to end of workspace
   R4 = 256-byte font reference array (-1 for no fonts)
   R5 = Pointer to (wildcarded) name to match 
                  (must be 12 bytes word-aligned)
                  ===============================
   R6 = position to search from (0 for first call)

On Exit:

   R2 = Pointer to remaining workspace
   R6 = position of next entry (0 if no match found)
   The template is at R1
   The font array is updated if fonts were used
   the string at R5 is overwritten by the actual name (so at least 12 bytes
                                                   must be available there)
                                                ============================

 ...

 You must be pointing to 12 bytes word aligned even if the longest template
                         =====================
name in the file is only 4 characters. 

 The Wimp uses this as a temporary area, and there is no guarantee that in
future versions it will not be used for things other than template names.


                Ran.

-----
"We're children, Needing other children
 And yet letting our grown up pride
 Hide all the need inside
 Acting more like children than children"