The ISAAC cipher: Difference between revisions

This is not an exact transationtranslation: the more important difference is the use of a global state record rather than a list of global variables. This global state is transmitted to each procedure. This way, it is possible to run several PRNG concurrently.

We have also replaced the eight variables "a" to "h" with an array. This allows to simplify the code at several places by using a loop. And we changed the "mod" to "and", even if the compiler will likely optimize the modulo when the second operand is a power of two.

Note that the "mix" procedure could possibly be transformed in a template or be marked as "inline" (in the C version, it is a "define"). But as we are not in a procedure whose performance is critical, expanding the code rather than calling a procedure is not very useful.