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  2. RPG400-L
  3. May 2004

Re: Opinions Wanted: List API loop logic

CWilt@xxxxxxxxxxxx wrote:
> 
> Basis: hey we can do pointer arithmetic right?
>      c               eval      p_Limit = p_ListHeader + DataOffset
>      c                                 + ( NumEntries * ( EntrySize - 1 ) ) 
>      c               for       p_ListEntry = p_ListHeader + DataOffset
>      c                              to p_Limit
>      c                              by EntrySize
> 

Here's something similar, but using offsets instead of pointers:

c                   eval      p_ListStart = pListHeader + DataOffset
c                   for       offset = 0 
c                             to EntrySize * (NumEntries - 1)
c                             by EntrySize
c                   eval      p_ListEntry = pListStart + offset

c***       ... at this point, the JOBL0100 data structure contains
c***       ... one of the entries of the list.

c                   endfor

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