1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// range.h: Rcpp R/C++ interface class library -- range
//
// Copyright (C) 2012 - 2013 Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp 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.
//
// Rcpp 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 Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef Rcpp__sugar__range_h
#define Rcpp__sugar__range_h
namespace Rcpp{
namespace sugar{
template <int RTYPE, bool NA, typename T>
class Range {
public:
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Range( const T& obj_) : obj(obj_) {}
operator Vector<RTYPE>(){
min_ = max_ = obj[0] ;
if( Rcpp::traits::is_na<RTYPE>( min_ ) ) return Vector<RTYPE>::create( min_, max_ ) ;
R_xlen_t n = obj.size() ;
for( R_xlen_t i=1; i<n; i++){
current = obj[i] ;
if( Rcpp::traits::is_na<RTYPE>( current ) ) return Vector<RTYPE>::create( min_, max_ ) ;
if( current < min_ ) min_ = current ;
if( current > max_ ) max_ = current ;
}
return Vector<RTYPE>::create( min_, max_ ) ;
}
private:
const T& obj ;
STORAGE min_, max_, current ;
} ;
// version for NA = false
template <int RTYPE, typename T>
class Range<RTYPE,false,T> {
public:
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Range( const T& obj_) : obj(obj_) {}
operator Vector<RTYPE>(){
min_ = max_ = obj[0] ;
R_xlen_t n = obj.size() ;
for( R_xlen_t i=1; i<n; i++){
current = obj[i] ;
if( current < min_ ) min_ = current ;
if( current > max_ ) max_ = current ;
}
return Vector<RTYPE>::create( min_, max_ ) ;
}
private:
const T& obj ;
STORAGE min_, max_, current ;
} ;
} // sugar
template <int RTYPE, bool NA, typename T>
sugar::Range<RTYPE,NA,T> range( const VectorBase<RTYPE,NA,T>& x){
return sugar::Range<RTYPE,NA,T>(x.get_ref()) ;
}
} // Rcpp
#endif
|
