1 files changed, 116 insertions, 0 deletions
diff --git a/Sockets/RandomNumber.cpp b/Sockets/RandomNumber.cpp
new file mode 100644
index 0000000..77ba30d
--- /dev/null
+++ b/Sockets/RandomNumber.cpp
@@ -0,0 +1,116 @@
+/**
+ * @author Adam McLaurin
+ * @date   September 2006
+ */
+/*
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GN6U General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+#include "RandomNumber.h"
+#include <limits>
+#include <time.h>
+
+#ifdef SOCKETS_NAMESPACE
+namespace SOCKETS_NAMESPACE {
+#endif
+
+const unsigned long int RandomNumber::X_SEED_DEFAULT = 123456789UL;
+const unsigned long int RandomNumber::Y_SEED_DEFAULT = 362436069UL;
+const unsigned long int RandomNumber::Z_SEED_DEFAULT = 521288629UL;
+const unsigned long int RandomNumber::W_SEED_DEFAULT = 88675123UL;
+
+
+RandomNumber::RandomNumber(bool time_shuffle)
+:mXSeed(time_shuffle ? (unsigned long)time(NULL) ^ X_SEED_DEFAULT : X_SEED_DEFAULT)
+,mYSeed(time_shuffle ? (unsigned long)time(NULL) ^ Y_SEED_DEFAULT : Y_SEED_DEFAULT)
+,mZSeed(time_shuffle ? (unsigned long)time(NULL) ^ Z_SEED_DEFAULT : Z_SEED_DEFAULT)
+,mWSeed(time_shuffle ? (unsigned long)time(NULL) ^ W_SEED_DEFAULT : W_SEED_DEFAULT)
+{
+  reset();
+}
+
+RandomNumber::RandomNumber(
+  unsigned long int x_seed,
+  unsigned long int y_seed,
+  unsigned long int z_seed,
+  unsigned long int w_seed)
+:mXSeed(x_seed)
+,mYSeed(y_seed)
+,mZSeed(z_seed)
+,mWSeed(w_seed)
+{
+  reset();
+}
+
+RandomNumber::~RandomNumber()
+{
+}
+
+void RandomNumber::reset()
+{
+  mX = mXSeed;
+  mY = mYSeed;
+  mZ = mZSeed;
+  mW = mWSeed;
+}
+
+RandomNumber::operator unsigned long int() const
+{
+  return(mW);
+}
+
+unsigned long int RandomNumber::next()
+{
+  register unsigned long int t = (mX ^ (mX<<11));
+
+  mX = mY;
+
+  mY = mZ;
+
+  mZ = mW;
+
+  return(mW = (mW ^ (mW>>19)) ^ (t ^ (t>>8)));
+}
+
+unsigned long int RandomNumber::skip(unsigned long int s)
+{
+  for(register unsigned long int i = 0 ; i < s ; ++i)
+  {
+    (void)next();
+  }
+
+  return(mW);
+}
+
+void RandomNumber::getSeed(
+  unsigned long int& x_seed,
+  unsigned long int& y_seed,
+  unsigned long int& z_seed,
+  unsigned long int& w_seed)
+{
+  x_seed = mXSeed;
+  y_seed = mYSeed;
+  z_seed = mZSeed;
+  w_seed = mWSeed;
+}
+
+unsigned long int RandomNumber::max_random()
+{
+  return(std::numeric_limits<unsigned long int>::max());
+}
+
+#ifdef SOCKETS_NAMESPACE
+} // namespace SOCKETS_NAMESPACE {
+#endif
+