Paul,
recPtr is a UInt8*, so Neil's math is correct. recPtr[sizeof(UInt32)] is
recPtr[4], which is 4 bytes from the beginning of the buffer.
However, I'm pretty sure that that second parameter should be be the *address*
of the element. That is, "&recPtr[sizeof(UInt32)]".
-- Keith
Paul Bohme <[EMAIL PROTECTED]> on 10/03/2000 10:43:41 AM
Please respond to "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent by: Paul Bohme <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
cc: (Keith Rollin/US/PALM)
Subject: RE: Compilation error with C++
> Do the following instead:
> UInt8 *recPtr;
> recPtr = (UInt8 *) MemHandleLock(recHandle);
> ...
> MemMove(pSig, recPtr[sizeof(UInt32)],
MemPtrSize(recPtr)-sizeof(UInt32));
Yipes! Almost. The above will actually move it forward sizeof(UInt32) *
sizeof(UInt32) - probably more than you want. To get the proper math, use a
CharPtr instead for your recPtr - so when you add a number to it or use an
array offset, it'll be doing single-byte moves instead of in increments of
sizeof(UInt32).
Also, if it's C++, might want to consider the conventional static_cast<>
instead of the C-style cast - but that's just me being anal. ;-)
-P
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