is_infinite.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// is_infinite.h: Rcpp R/C++ interface class library -- is infinite
//
// Copyright (C) 2013 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__traits_is_infinite_h
#define Rcpp__traits_is_infinite_h
 
namespace Rcpp{
namespace traits{
 
    // default for all but REALSXP and CPLXSXP
        template <int RTYPE>
        bool is_infinite( typename storage_type<RTYPE>::type){
            return false ;
        }
 
        template <>
        inline bool is_infinite<REALSXP>( double x ){
                return !( ISNAN(x) || R_FINITE(x) ) ;
        }
 
        template <>
        inline bool is_infinite<CPLXSXP>( Rcomplex x ){
                return is_infinite<REALSXP>(x.r) || is_infinite<REALSXP>(x.i) ;
        }
 
}
}
 
#endif