On 21/04/17 10:11, Mark Morgan Lloyd wrote: > Am I correct in interpreting the documentation as implying that if I > want to get a full-range 32-bit unsigned random number I have to use > something like Random($100000000) ? > > Internally, that gets a 64-bit random by calling genrand_MT19937 twice > and throwing away one of the results. Not only does that waste time, but > it also means that if I use a "well known" seed I only see every other > value from the expected sequence e.g. http://oeis.org/A221557 >
For a 32bit unsigned, I would be inclined to use random to a int64, and mask out the upper bits. You could also write an XORShift generator if you are prepared to forgo the presence of zero in the sequence. Peter. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
