Rcpp Version 0.12.12
runif.h
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1 // -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
2 //
3 // runif.h: Rcpp R/C++ interface class library --
4 //
5 // Copyright (C) 2010 - 2016 Douglas Bates, Dirk Eddelbuettel and Romain Francois
6 //
7 // This file is part of Rcpp.
8 //
9 // Rcpp is free software: you can redistribute it and/or modify it
10 // 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 // Rcpp is distributed in the hope that it will be useful, but
15 // WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
18 //
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20 // along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
21 
22 #ifndef Rcpp__stats__random_runif_h
23 #define Rcpp__stats__random_runif_h
24 
25 namespace Rcpp {
26 namespace stats {
27 
28 class UnifGenerator : public ::Rcpp::Generator<double> {
29 public:
30 
31  UnifGenerator( double min_ = 0.0, double max_ = 1.0) :
32  min(min_), diff(max_ - min_) {}
33 
34  inline double operator()() const {
35  double u;
36  do {u = unif_rand();} while (u <= 0 || u >= 1);
37  return min + diff * u;
38  }
39 
40 private:
41  double min;
42  double diff ;
43 };
44 
45 class UnifGenerator__0__1 : public ::Rcpp::Generator<double> {
46 public:
47 
49 
50  inline double operator()() const {
51  double u;
52  do {u = unif_rand();} while (u <= 0 || u >= 1);
53  return u;
54  }
55 };
56 
57 } // stats
58 } // Rcpp
59 
60 #endif
double operator()() const
Definition: runif.h:34
double operator()() const
Definition: runif.h:50
double unif_rand(void)
Definition: Rmath.h:31
Rcpp API.
Definition: algo.h:28
UnifGenerator(double min_=0.0, double max_=1.0)
Definition: runif.h:31