| 1 | //FJSTARTHEADER
|
|---|
| 2 | // $Id: BasicRandom.cc 4354 2018-04-22 07:12:37Z salam $
|
|---|
| 3 | //
|
|---|
| 4 | // Copyright (c) 2005-2018, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
|
|---|
| 5 | //
|
|---|
| 6 | //----------------------------------------------------------------------
|
|---|
| 7 | // This file is part of FastJet.
|
|---|
| 8 | //
|
|---|
| 9 | // FastJet is free software; you can redistribute it and/or modify
|
|---|
| 10 | // it under the terms of the GNU General Public License as published by
|
|---|
| 11 | // the Free Software Foundation; either version 2 of the License, or
|
|---|
| 12 | // (at your option) any later version.
|
|---|
| 13 | //
|
|---|
| 14 | // The algorithms that underlie FastJet have required considerable
|
|---|
| 15 | // development. They are described in the original FastJet paper,
|
|---|
| 16 | // hep-ph/0512210 and in the manual, arXiv:1111.6097. If you use
|
|---|
| 17 | // FastJet as part of work towards a scientific publication, please
|
|---|
| 18 | // quote the version you use and include a citation to the manual and
|
|---|
| 19 | // optionally also to hep-ph/0512210.
|
|---|
| 20 | //
|
|---|
| 21 | // FastJet is distributed in the hope that it will be useful,
|
|---|
| 22 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 23 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 24 | // GNU General Public License for more details.
|
|---|
| 25 | //
|
|---|
| 26 | // You should have received a copy of the GNU General Public License
|
|---|
| 27 | // along with FastJet. If not, see <http://www.gnu.org/licenses/>.
|
|---|
| 28 | //----------------------------------------------------------------------
|
|---|
| 29 | //FJENDHEADER
|
|---|
| 30 |
|
|---|
| 31 | // nlo includes
|
|---|
| 32 | #include "fastjet/internal/BasicRandom.hh"
|
|---|
| 33 |
|
|---|
| 34 |
|
|---|
| 35 | FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | //
|
|---|
| 39 | // random number generator
|
|---|
| 40 | // uses method of L'Ecuyer, (via F.James, comp. phys. comm. 60(1990)329)
|
|---|
| 41 | //
|
|---|
| 42 | int __default_random_generator(int *__iseed)
|
|---|
| 43 | {
|
|---|
| 44 | int __k = __iseed[0]/53668;
|
|---|
| 45 | __iseed[0] = (__iseed[0] - __k*53668)*40014 - __k*12211;
|
|---|
| 46 | if(__iseed[0] < 0) __iseed[0] += 2147483563;
|
|---|
| 47 |
|
|---|
| 48 | __k = __iseed[1]/52774;
|
|---|
| 49 | __iseed[1] = (__iseed[1] - __k*52774)*40692 - __k*3791;
|
|---|
| 50 | if(__iseed[1] < 0) __iseed[1] += 2147483399;
|
|---|
| 51 |
|
|---|
| 52 | int __iz = __iseed[0] - __iseed[1];
|
|---|
| 53 | if(__iz < 1) __iz += 2147483562;
|
|---|
| 54 |
|
|---|
| 55 | return __iz;
|
|---|
| 56 | }
|
|---|
| 57 |
|
|---|
| 58 | // global defined random number generator
|
|---|
| 59 | BasicRandom<int> _G_random_int;
|
|---|
| 60 | BasicRandom<double> _G_random_double;
|
|---|
| 61 |
|
|---|
| 62 |
|
|---|
| 63 | FASTJET_END_NAMESPACE
|
|---|
| 64 |
|
|---|
