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
+---
| This is the RPG/400 Mailing List!
| To submit a new message, send your mail to RPG400-L@midrange.com.
| To subscribe to this list send email to RPG400-L-SUB@midrange.com.
| To unsubscribe from this list send email to RPG400-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---