1 files changed, 34 insertions, 0 deletions

diff --git a/src/mt/qran.h b/src/mt/qran.h
new file mode 100644
index 0000000..10f9a6f
--- /dev/null
+++ b/src/mt/qran.h
@@ -0,0 +1,34 @@
+/*************************************************************************
+ *
+ * HTCd - Copyright (C) 1998-2006 Henrik Rydberg
+ *
+ * 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
+ * GNU 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef QRANH
+#define QRANH
+
+#include <math.h>
+
+inline double QUniform(unsigned long& q) {
+  q=1664525L*q+1013904223L;
+  unsigned long long s=q;s<<=20;s|=(1023ULL<<52);return *(double*)&s-1;
+}
+inline int QRanBit(unsigned long& q) {
+  if(q&131072U) { q=((q^19U)<<1)|1U; return 1; }
+  else { q<<=1; return 0; }
+}
+
+#endif