empire/empserver
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
empserver/tests
History
Markus Armbruster 39c26f4238 Switch PRNG from BSD random() to Mersenne Twister 
random() may yield different pseudo-random number sequences for the
same seed on another system.  For instance, at least some versions of
MinGW provide a random() in -liberty that differs from traditional BSD
(see commit c8231b12).  Rather inconvenient for regression testing.

MT19937 Mersenne Twister is a proven, high-quality PRNG.  Actual code
is reference code provided by the inventors[*].  Quick tests show
performance comparable to random().

Like random(), MT is not cryptographically secure: observing enough of
its output permits guessing its state, and thus its future output.  I
don't think players can do that.

Drop the copy of BSD random() we added for Windows.

Like the previous commit, this changes the server's die rolls, and
makes fairland create a different random map for the same seed.  Update
expected smoke test results accordingly.

[*] mt19937ar.sep.tgz downloaded from
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html
2013-05-08 06:55:21 +02:00
..
fairland Switch PRNG from BSD random() to Mersenne Twister 2013-05-08 06:55:21 +02:00
files Add files test to make check 2013-05-08 06:55:18 +02:00
smoke Switch PRNG from BSD random() to Mersenne Twister 2013-05-08 06:55:21 +02:00
fairland-test Switch PRNG from BSD random() to Mersenne Twister 2013-05-08 06:55:21 +02:00
files-test Add files test to make check 2013-05-08 06:55:18 +02:00
normalize.pl Make smoke test check the final empdump -x 2013-05-08 06:55:18 +02:00
smoke-test Switch PRNG from BSD random() to Mersenne Twister 2013-05-08 06:55:21 +02:00
test-common.sh Factor tests/test-common.sh out of tests/smoke-test 2013-05-08 06:55:18 +02:00