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max.h
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66 lines (50 loc) · 1.58 KB
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#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() {
max_ = obj[0] ;
if( Rcpp::traits::is_na<RTYPE>( max_ ) ) return max_ ;
int n = obj.size() ;
for( int 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 ;
STORAGE min_, max_, current ;
} ;
// 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() {
max_ = obj[0] ;
int n = obj.size() ;
for( int i=1; i<n; i++){
current = obj[i] ;
if( current > max_ ) max_ = current ;
}
return max_ ;
}
private:
const T& obj ;
STORAGE max_, current ;
} ;
} // 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