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
|
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// upper_tri.h: Rcpp R/C++ interface class library -- lower.tri
//
// Copyright (C) 2010 - 2011 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__upper_tri_h
#define Rcpp__sugar__upper_tri_h
namespace Rcpp{
namespace sugar{
template <int RTYPE, bool LHS_NA, typename LHS_T>
class UpperTri : public VectorBase<
LGLSXP ,
false ,
UpperTri<RTYPE,LHS_NA,LHS_T>
> {
public:
typedef Rcpp::MatrixBase<RTYPE,LHS_NA,LHS_T> LHS_TYPE ;
UpperTri( const LHS_TYPE& lhs, bool diag) :
nr( lhs.nrow() ), nc( lhs.ncol() ),
getter( diag ? (&UpperTri::get_diag_true) : (&UpperTri::get_diag_false) ){}
inline int operator()( int i, int j ) const {
return get(i,j) ;
}
inline R_xlen_t size() const { return static_cast<R_xlen_t>(nr) * nc ; }
inline int nrow() const { return nr; }
inline int ncol() const { return nc; }
private:
int nr, nc ;
typedef bool (UpperTri::*Method)(int,int) ;
Method getter ;
inline bool get_diag_true( int i, int j ){
return i >= j ;
}
inline bool get_diag_false( int i, int j ){
return i > j ;
}
inline bool get( int i, int j){
return (this->*getter)(i, j ) ;
}
} ;
} // sugar
template <int RTYPE, bool LHS_NA, typename LHS_T>
inline sugar::UpperTri<RTYPE,LHS_NA,LHS_T>
upper_tri( const Rcpp::MatrixBase<RTYPE,LHS_NA,LHS_T>& lhs, bool diag = false){
return sugar::UpperTri<RTYPE,LHS_NA,LHS_T>( lhs, diag ) ;
}
} // Rcpp
#endif
|
