Problem - Kevin Tafuro

12.7 Splitting Variables
Problem
Large scalar variables that cannot be merged, or that have large values that cannot
easily be manipulated with a constant transform, need to be obfuscated.
Solution
Splitting variables can be effective when the variables holding the split values are in
different scopes. The split can also be performed during variable initialization by
rewriting the SPLIT_VAR macro presented in the “Discussion” section to declare and
initialize the variables, rather than simply assigning to them.
Discussion
The value of a scalar variable can be split over a number of equal- or smaller-sized
variables. The following code demonstrates how the four bytes of an integer can be
stored in four different character variables:
#define SPLIT_VAR(in, a, b, c, d) do { \
(a) = (char)((in) >> 24); \
(b) = (char)((in) >> 16); \
(c) = (char)((in) >> 8); \
(d) = (char)((in) & 0xFF); \
} while (0)
#define REBUILD_VAR(a, b, c, d) \
((((a)