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// max.h: Rcpp R/C++ interface class library -- max
//
// Copyright (C) 2012 - 2018 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__max_h
#define Rcpp__sugar__max_h
namespace Rcpp{
namespace sugar{
template <int RTYPE, bool NA, typename T>
class Max {
public:
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Max( const T& obj_) : obj(obj_) {}
operator STORAGE() const {
R_xlen_t n = obj.size();
if (n == 0) return(static_cast<STORAGE>(R_NegInf));
STORAGE max, current ;
max = obj[0] ;
if( Rcpp::traits::is_na<RTYPE>( max ) ) return max ;
for( R_xlen_t i=1; i<n; i++){
current = obj[i] ;
if( Rcpp::traits::is_na<RTYPE>( current ) ) return current;
if( current > max ) max = current ;
}
return max ;
}
private:
const T& obj ;
} ;
// version for NA = false
template <int RTYPE, typename T>
class Max<RTYPE,false,T> {
public:
typedef typename Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Max( const T& obj_) : obj(obj_) {}
operator STORAGE() const {
R_xlen_t n = obj.size();
if (n == 0) return(static_cast<STORAGE>(R_NegInf));
STORAGE max, current ;
max = obj[0] ;
for( R_xlen_t i=1; i<n; i++){
current = obj[i] ;
if( current > max ) max = current ;
}
return max ;
}
private:
const T& obj ;
} ;
} // sugar
template <int RTYPE, bool NA, typename T>
sugar::Max<RTYPE,NA,T> max( const VectorBase<RTYPE,NA,T>& x){
return sugar::Max<RTYPE,NA,T>(x.get_ref()) ;
}
} // Rcpp
#endif
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