Re: bsearch on partial array elements

It is possible.

In an application where user spaces are written (a lot of them), i coded a
byte count and added bytes as i wrote them (and moved the pointer) while
others calculated the byte count at the end by substraction of the end pos -
start pos + 1.

This works.

Anton Gombkötö

----- Original Message -----
From: "Chris Bipes" <rpg@cross-check.com>
To: <RPG400-L@midrange.com>
Sent: Friday, January 14, 2000 8:37 PM
Subject: RE: bsearch on partial array elements


> Is it possible to subtract the ending pointer from the starting pointer to
> see the byte count?  I have not tried this and wonder if it is even
possible
> to use pointer in an expression such as
> D P_to_Variable              *   Inz(%addr(Search_String))
> D P_to_found                 *
> C                eval bytes = P_to_found - P_to_variable
>
> Christopher K. Bipes    Mailto:chrisb@cross-check.com
> CrossCheck, Inc.        http://www.cross-check.com
>
>
> -----Original Message-----
> From: David.Biggs@bernardmatthews.com
> [mailto:David.Biggs@bernardmatthews.com]
> Sent: Friday, January 14, 2000 5:55 AM
> To: RPG400-L@midrange.com
> Subject: Re: bsearch on partial array elements
>
>
>
>
> Thanks Jon and others.
>  I knew about the basing pointers but wasn't sure what the C routine would
> do
> when comparing (in my case) a 30 byte key with a 37 byte element. I've
tried
> it
> for myself and it works just fine.
>
> I have another question though: in RPG LOKUP (or LOOKUP), you can specify
a
> field that is set to the element number of the search argument if the
search
> is
> successful. The C 'bsearch' returns a pointer to the key value being
sought,
> not
> its ordinal position in the array. This seems a bit stupid as I already
know
> what I'm looking for, what I want is whereabouts it is. Any way I can get
> this
> directly ?
>
> Regards,
> Dave
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