Move rng.{cpp,h} from core to rng/ topdir

Add a new class AutoSeeded_RNG that is a RandomNumberGenerator that wraps
up the logic formerly in RandomNumberGenerator::make_rng. make_rng in
fact now just returns a new AutoSeeded_RNG object.

AutoSeeded_RNG is a bit more convenient because

- No need to use auto_ptr
- No need to dereference (same syntax everywhere - it's an underestimated
advantage imo)

Also move the code from timer/timer_base to timer/

1 files changed, 2 insertions, 3 deletions

diff --git a/doc/examples/factor.cpp b/doc/examples/factor.cpp
index cf4d395d0..70dde1050 100644
--- a/doc/examples/factor.cpp
+++ b/doc/examples/factor.cpp
@@ -123,10 +123,9 @@ int main(int argc, char* argv[])
       {
       BigInt n(argv[1]);
 
-      std::auto_ptr<RandomNumberGenerator> rng(
-         RandomNumberGenerator::make_rng());
+      AutoSeeded_RNG rng;
 
-      std::vector<BigInt> factors = factorize(n, *rng);
+      std::vector<BigInt> factors = factorize(n, rng);
       std::sort(factors.begin(), factors.end());
 
       std::cout << n << ": ";