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Anonymous
Passing of Long arguments on OS400 (by Jochen Sack, 08/01/2005 12:13:03 PM) |  |
I stumbled across a question about how exactly Long arguments are passed from LotusScript to C functions on OS400.
As explained in Table 8 (p. 88) of your book, LotusScript on OS400 aligns Long variables to 16 Byte boundaries. On the other hand, the examples of OS400_ConvertTIMEDATEToText and OS400_ConvertTextToTIMEDATE given on p. 290 of the book suggest that Longs are "compressed" to only 4 Bytes each when passed as arguments to C functions. Otherwise the trick of simulating a NULL pointer (size=16 Bytes) by passing 4 zeros declared as `Byval Long` wouldn't work -- unless I'm missing something important of course.
Hence my question: Is it true that a LotusScript Long on OS400 is aligned to a 16 Byte boundary in memory, but instead to a 4 Byte boundary when pushed to the stack in a call to a C function?
Thanks in advance.
- Jochen