FOR/NEXT and GOSUB(PULL address from Stack)

hmlittle59 · 2008-02-03 01:59

Hello Everyone

I've got myself in a pickle!!!

I am within a FOR/NEXT loop and want to EXIT. The original flow of this routine was OK, but I added a PIN checking routine and want to EXIT upon a certain condition, back to the main calling routine. This routine is buried in the code by a couple of SUB-Routines and I want to be able to PULL a couple of return addresses "OFF" the stack. Is this possible from within PBasic?

1) I'm within my program by 2 gosubs routines
2) upon a certain condition i want to exit back to the main routine
3) does Pbasic allow me to PULL RETURN addresses off the stack?(or some other work around)

Note: the normal flow of the program was ok, I just wanted to add a routine to get me back to the main menu, other the reset.

thanks for any help

hmlittle59

Bruce Bates · 2008-02-03 02:11

hmlittle -

PBASIC 2.5 brought us the EXIT command. Take a look at it and see if it meets your needs.

To answer your question directly, there is no way to arbitrarily "pop" the RETURN stack in PBASIC (thankfully!). You can exit from a FOR ... NEXT loop any time you want, so long as you re-enter by the FOR statement, for re-initialization, the subsequent time through it.

Regards,

Bruce Bates

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Tracy Allen · 2008-02-03 02:59

To add to what Bruce said:

my_sub:
FOR ix=1 TO 1000
  FOR jx=1 TO 1000
     flag=in0  ' exit condition is in0=1
     IF flag=1 THEN EXIT
  NEXT
  IF flag=1 THEN EXIT
NEXT
RETURN   ' exits end up here

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Tracy Allen
www.emesystems.com

hmlittle59 · 2008-02-04 10:55

Thanks for the help....I'll try it

hmlittle59

FOR/NEXT and GOSUB(PULL address from Stack)

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