× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.


  • Subject: Re: page n of x
  • From: "paul cunnane" <paul@xxxxxxxxxxx>
  • Date: Thu, 14 Sep 2000 09:17:00 +0100

> Another problem with the above code is what happens if the ~~~~ occur on
> the 1024 byte boundary?  If I only get 2 '~'s at the end of the USERAREA
> buffer the scan won't work.

That's easy.  Instead of:

 C                   eval      usrspcptr = usrspcptr + 1024

use

 C                   eval      usrspcptr = usrspcptr + 1021

It's not immediately obvious, but the three-character overlap between
1024-byte chunks will guarantee that any given four-byte substring will be
found in exactly one chunk.  Think about it!

Another optimisation you could use: while scanning for the '~~~~'s, you
could remember where you found them in the user space (perhaps storing them
in a user index).  Then, instead of having to re-scan the user space, you
could use the stored offsets to position directly into the space, and
substitute the total page count directly.

One final thought: instead of outputting '~~~~' for the total page count, I
would probably modify the original report to output '~~~~~~~~~~~~~~~~~' as a
placeholder for the entire page number heading.  Then, rather than
substitute '  25' for '~~~~', I would substitute '     Page 1 of 25' for the
entire placeholder.  For my money, this looks greatly superior to 'Page    1
of   25' on the final report, and is not really any more difficult to do.

(Note that this would change my '1021' solution above to a '1008'
solution -- the pointer increment must always be the the chunk length, less
the length of the string being sought, plus one.)

My EUR 0.02...

--
Paul


+---
| 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
+---

As an Amazon Associate we earn from qualifying purchases.

This thread ...

Follow-Ups:
Replies:

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.