From 5df79c53745fde5d6c3340a2979b1429cd5892c1 Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Sat, 8 Oct 2011 20:30:28 +0200 Subject: Initial import of htcd system 1.0 Signed-off-by: Henrik Rydberg --- src/mt/qran.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 src/mt/qran.h (limited to 'src/mt/qran.h') 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 + +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 -- cgit v1.2.3