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sign.h
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59 lines (45 loc) · 1.4 KB
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#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 ;
Sign( const VEC_TYPE& object_ ) : object(object_){}
inline int operator[]( int i ) const {
return get(i) ;
}
inline int size() const { return object.size() ; }
inline int get(int 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