Re: API's & upper vs. lower case

["David Prowak" <prowakd@xxxxxxx>]

When you speak of the Command Analyzer, are you talking
about the part of QCMD that does the command prompting?
----------
> From: bvining@VNET.IBM.COM
> To: MIDRANGE-L@midrange.com
> Subject: API's & upper vs. lower case
> Date: Wednesday, September 30, 1998 12:35 PM
> 
> Dave,
> 
> System APIs do not, in general, fold lowercase character data to
> uppercase.  The APIs typically use exactly what was passed into them.
> This is documented in the System API Programming manual under API
> parameters (as it relates to object names anyway).
> 
> Command Analyzer, on the other hand, does fold lowercase to uppercase
> unless double quotes are used in the string.  I suspect that QCMDEXC
> is doing the uppercasing but this is somewhat a moot point as for sure
> Command Analyzer (when processing the CRTDTAQ string value) will; and
> so you end up with 'Plates' becoming 'PLATES' on the Create and 'Plates'
> being used on the other APIs.
> 
> There is nothing you can do to control this in your function prototypes.
> CONST suggests the API won't modify your local input argument, but
> doesn't stop the API from modifying its local copy of your input
> argument...
> 
> I believe what you need to do is make sure that the arguments are
> consistently in uppercase.
> 
> Bruce
> 
> >
> >Hi,
> >I am using prototypes that serve as wrapper functions to call
> >QCMDEXC, QUSROBJD, QSNDDTAQ and QRCVDTAQ  in an
> >application that utilizes data queues.  The name of the data queue
> >that I am using is "PLATES".  Well, on a number of occasions,
> >I have mistyped  "PLATES", and instead types "Plates".
> >
> >Well it seems that when I check for the existence of the object
> >using QUSROBJD, and "PLATES" already exists, but I specify
> >"Plates"  instead, I get CPF9801 = obj not found.
> >So I go and create the DTAQ "Plates" using QCMDEXC and CRTDTAQ,
> >and that blows up because "PLATES" already exists.
> >Well if it already exists, then why wasn't it found on the QUSROBJD
call?
> >When I fix my typing errors, its works as expected.
> >
> >I've encountered similar errors when I use "Plates" on the
> >QSNDDTAQ rather then "PLATES".   I am told then that the
> >DTAQ doesn't exist.
> >
> >FYI: My prototypes use the CONST keyword whenever passing
> >       the DTAQ name.
> >
> >The problem is (obviously) easy enough to fix, but, how come
> >this sort of behavior exists?  Does OS/400 know the difference between
> >the DTAQs "PLATES" and "Plates"?  Is it the API's making the
> >distinction?  Something with my prototypes?
> >
> >I appreciate any clarity that you can offer.
> >TIA,
> >Dave
> >
> 
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