%Bof Condition or something like

[raffaeu]

Hy guys i have finally resolved all my problems and issues with the subFIle. So hard to learn ... Now i have a cool question. I see that exist an %Eof condition that return always me '1' if my RPG is on the End Of File. Now my question is, does exist another switch like %Eof that tell me i'm at Bof?

I need this because when i read a file for charge the subfile data, i manage also the rollDown(PageUp) with a ReadPE. I need to know when i'm at Bof or Eof. For my RPG is different.

[MikeS]

Re: %Bof Condition or something like

%EOF will suffice for both the EOF and BOF conditions. It all depends on the direction of the read.

If you are doing a READ (or READE) and run out of records (i.e. at the End of File) then %EOF will be set on.

If you are doing a READP (or READPE) and run out of records (i.e. at Beginning of File) then %EOF is set on.

So....when reading forwards %EOF tells you that you have reached the End of File, and if reading backwards %EOF tells you when you have reached the beginning of the file.

HTH Mike

[raffaeu]

Re: %Bof Condition or something like

O well now i know why sometimes it tell me End Of but i'm at the beginning (i think)

[Sbp0718]

Re: %Bof Condition or something like

There are two ends of any file. The top and the bottom. The %EOF is telling you that you are at one end or the other.

Welcome to the Forums.

[raffaeu]

Re: %Bof Condition or something like

Ok but i need to make distinction for End and Begin ... Is there something to know this? I explain, when i make a pagedown on my manually subfile if i'm at the of my Eof turn on but also when i'm at the begin ... I need to make a distinction ...

[jamief]

Re: %Bof Condition or something like

if you have more than 1 record in the file then rrn=1 BOF anything greater than rrn>1 = EOF

use INFDS to get RRN
D DB_RRN 397 400I 0 * Relative-rcd-num

http://www.code400.com/datastructures.php

[raffaeu]

Re: %Bof Condition or something like

thanks a lot. Maybe you know i need to include a select statment in my rpgle and work with single records thet it returns me, have you some goog link page?