Structure of a Byte Variable

Thanks to the code posted below by Darrel
in http://www.picbasic.co.uk/forum/showthread.php?t=9134

Code:

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TimeCmpFlags  VAR BYTE
  PastStart  VAR TimeCmpFlags.0
  PastStop    VAR TimeCmpFlags.1
  NextDay    VAR TimeCmpFlags.2
  ProgON      VAR TimeCmpFlags.3


CheckTimes:
  TimeCmpFlags = 0  ; clear flags first

    ; if the Start and Stop times are the same, then Always OFF
  if (Stop_H=Start_H) AND _     
    (Stop_M=Start_M) AND _
    (Stop_S=Start_S) then AlwaysOFF                     

    ; is it past the Start time?
  if (Hours>Start_H) OR _             
    (Hours=Start_H AND Minutes>Start_M) OR _
    (Hours=Start_H AND Minutes=Start_M AND Seconds>=Start_S) then PastStart=1

    ; is it past the Stop time?
  if (Hours>Stop_H) OR _               
    (Hours=Stop_H AND Minutes>Stop_M) OR _
    (Hours=Stop_H AND Minutes=Stop_M AND Seconds>=Stop_S) then PastStop=1

    ; does the period end the following day?
  if (Stop_H< Start_H) OR _         
    (Stop_H=Start_H AND Stop_M < Start_M) OR _
    (Stop_H=Start_H AND Stop_M=Start_M AND Stop_S < Start_S) then NextDay=1
   
  ;---------------
  if !NextDay then                              ; same day, use AND
      if PastStart AND !PastStop then ProgON = 1
  else                                          ; next day, use OR
      IF PastStart OR !PastStop then ProgON = 1
  endif
   
  AlwaysOFF:
return

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I will never think of a BYTE variable the same way again. I always thought of a BYTE as a container which holds a number from 0-255, but the code above struck me this way, a BYTE is a BIT Array! where 8 bits all share the same variable name. All in how you look at things I guess, I saved this as an example for some future need. Thanks Darrel.

Quote:

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Originally Posted by Joe S.

All in how you look at things I guess

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Exactly!

Thanks for fishing Joe. :)
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