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
|
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// sign.h: Rcpp R/C++ interface class library -- sign
//
// Copyright (C) 2010 - 2012 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__sign_h
#define Rcpp__sugar__sign_h
namespace Rcpp{
namespace sugar{
template <bool NA, int RTYPE>
class sign__impl{
public:
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
static inline int get( STORAGE x){
return Rcpp::traits::is_na<RTYPE>(x) ? NA_INTEGER : ( x > 0 ? 1 : (x==0 ? 0 : -1) ) ;
}
} ;
template <int RTYPE>
class sign__impl<false,RTYPE>{
public:
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
static inline int get( STORAGE x){
return ( x > 0 ? 1 : (x==0 ? 0 : -1) ) ;
}
} ;
template <int RTYPE, bool NA, typename T>
class Sign : public Rcpp::VectorBase< INTSXP,NA, Sign<RTYPE,NA,T> > {
public:
typedef typename Rcpp::VectorBase<RTYPE,NA,T> VEC_TYPE ;
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
typedef int r_import_type ;
Sign( const VEC_TYPE& object_ ) : object(object_){}
inline int operator[]( R_xlen_t i ) const {
return get(i) ;
}
inline R_xlen_t size() const { return object.size() ; }
operator SEXP() const { return wrap( *this ); }
inline int get(R_xlen_t i) const { return sign__impl<NA,RTYPE>::get( object[i] ); }
private:
const VEC_TYPE& object ;
} ;
} // sugar
template <bool NA, typename T>
inline sugar::Sign<INTSXP,NA,T> sign( const VectorBase<INTSXP,NA,T>& t){
return sugar::Sign<INTSXP,NA,T>( t ) ;
}
template <bool NA, typename T>
inline sugar::Sign<REALSXP,NA,T> sign( const VectorBase<REALSXP,NA,T>& t){
return sugar::Sign<REALSXP,NA,T>( t ) ;
}
} // Rcpp
#endif
|
