So, splitting this idea out from the separate post on the predict function, I propose adding the new operations ROL and ROR to the RPN interpreter.
They would rotate the top 3 items left or right, and have this effect on the stack ... 1,2,3,ROL --> 2,3,1 1,2,3,ROR --> 3,1,2 These allow more complex arithmetic to be performed and complement the existing EXC operator. A context-diff against 1.4 is attached for your consideration; it is pretty simple and implemented similarly to EXC. The modified files are rrd_rpncalc.h and rrd_rpncalc.c Steve Steve Shipway [email protected]
rol-ror.patch
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smime.p7s
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