Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!uunet!mcsun!ukc!icdoc!sot-ecs!snb90
From: snb90@uk.ac.soton.ecs (Stewart Brodie)
Newsgroups: comp.sys.acorn
Subject: Re: Answer: Problem with procedures in BASIC
Message-ID: <8070@ecs.soton.ac.uk>
Date: 10 Jun 91 10:37:09 GMT
References: <8009@ecs.soton.ac.uk> <7475@acorn.co.uk>
Sender: news@ecs.soton.ac.uk
Distribution: comp
Lines: 62
Organisation: University of Southampton
Originator: snb90@gloriana

In <7475@acorn.co.uk> RMokady@acorn.co.uk (Ran Mokady) writes:

>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" 


Sorry, I was quoting from memory and I've never had this kind of problem
before. Must be just lucky.

Stewart