or.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// or.h: Rcpp R/C++ interface class library -- 
//
// 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__logical_or_h
#define Rcpp__sugar__logical_or_h

namespace Rcpp{
namespace sugar{  

template <bool LHS_NA, typename LHS_T, bool RHS_NA, typename RHS_T>
class Or_SingleLogicalResult_SingleLogicalResult : 
public SingleLogicalResult< 
        (LHS_NA || RHS_NA) , 
        Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,RHS_NA,RHS_T>
        >
{
public: 
        typedef SingleLogicalResult<LHS_NA,LHS_T> LHS_TYPE ;
        typedef SingleLogicalResult<RHS_NA,RHS_T> RHS_TYPE ;
        typedef SingleLogicalResult< 
                (LHS_NA || RHS_NA) , 
                Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,RHS_NA,RHS_T>
        > BASE ;
        
        Or_SingleLogicalResult_SingleLogicalResult( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_) :
                lhs(lhs_), rhs(rhs_){} ;
        
        inline void apply(){
                int left = lhs.get() ;
                if( Rcpp::traits::is_na<LGLSXP>( left ) ){
                        BASE::set( left ) ;
                } else if( left == TRUE ){
                        BASE::set( TRUE ) ;
                } else {
                        BASE::set( rhs.get() ) ;
                }
        }
                
private:
        const LHS_TYPE& lhs ;
        const RHS_TYPE& rhs ;
        
} ;

// special version when we know the rhs is not NA     
template <bool LHS_NA, typename LHS_T, typename RHS_T>
class Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,false,RHS_T> : 
public SingleLogicalResult< 
        LHS_NA , 
        Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,false,RHS_T>
        >
{
public: 
        typedef SingleLogicalResult<LHS_NA,LHS_T> LHS_TYPE ;
        typedef SingleLogicalResult<false,RHS_T> RHS_TYPE ;
        typedef SingleLogicalResult< 
                LHS_NA, 
                Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,false,RHS_T>
        > BASE ;
        
        Or_SingleLogicalResult_SingleLogicalResult( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_) :
                lhs(lhs_), rhs(rhs_){} ;
        
        inline void apply(){
                // here we know rhs does not have NA, so we start with the rhs
                int right = rhs.get() ;
                if( right == TRUE ){
                        BASE::set( TRUE ) ;
                } else {
                        BASE::set( lhs.get() ) ;
                }
        }
                
private:
        const LHS_TYPE& lhs ;
        const RHS_TYPE& rhs ;
        
} ;


// special version when we know the lhs is not NA     
template <typename LHS_T, bool RHS_NA, typename RHS_T>
class Or_SingleLogicalResult_SingleLogicalResult<false,LHS_T,RHS_NA,RHS_T> : 
public SingleLogicalResult< 
        RHS_NA , 
        Or_SingleLogicalResult_SingleLogicalResult<false,LHS_T,RHS_NA,RHS_T>
        >
{
public: 
        typedef SingleLogicalResult<false,LHS_T> LHS_TYPE ;
        typedef SingleLogicalResult<RHS_NA,RHS_T> RHS_TYPE ;
        typedef SingleLogicalResult< 
                RHS_NA, 
                Or_SingleLogicalResult_SingleLogicalResult<false,LHS_T,RHS_NA,RHS_T>
        > BASE ;
        
        Or_SingleLogicalResult_SingleLogicalResult( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_) :
                lhs(lhs_), rhs(rhs_){} ;
        
        inline void apply(){
                // here we know lhs does not have NA, so we start with the rhs
                int left = lhs.get() ;
                if( left == TRUE ){
                        BASE::set( TRUE ) ;
                } else {
                        BASE::set( rhs.get() ) ;
                }
        }
                
private:
        const LHS_TYPE& lhs ;
        const RHS_TYPE& rhs ;
        
} ;

// special version when we know both the lhs and the rhs are not NA     
template <typename LHS_T, typename RHS_T>
class Or_SingleLogicalResult_SingleLogicalResult<false,LHS_T,false,RHS_T> : 
public SingleLogicalResult< 
        false , 
        Or_SingleLogicalResult_SingleLogicalResult<false,LHS_T,false,RHS_T>
        >
{
public: 
        typedef SingleLogicalResult<false,LHS_T> LHS_TYPE ;
        typedef SingleLogicalResult<false,RHS_T> RHS_TYPE ;
        typedef SingleLogicalResult< 
                false, 
                Or_SingleLogicalResult_SingleLogicalResult<false,LHS_T,false,RHS_T>
        > BASE ;
        
        Or_SingleLogicalResult_SingleLogicalResult( const LHS_TYPE& lhs_, const RHS_TYPE& rhs_) :
                lhs(lhs_), rhs(rhs_){} ;
        
        inline void apply(){
                int left = lhs.get() ;
                if( left == TRUE ){
                        BASE::set( TRUE ) ;
                } else {
                        BASE::set( rhs.get() ) ;
                }
        }
                
private:
        const LHS_TYPE& lhs ;
        const RHS_TYPE& rhs ;
        
} ;


template <bool LHS_NA, typename LHS_T>
class Or_SingleLogicalResult_bool : 
public SingleLogicalResult< 
        LHS_NA , 
        And_SingleLogicalResult_bool<LHS_NA,LHS_T>
        >
{
public: 
        typedef SingleLogicalResult<LHS_NA,LHS_T> LHS_TYPE ;
        typedef SingleLogicalResult< 
                LHS_NA , 
                Or_SingleLogicalResult_bool<LHS_NA,LHS_T>
        > BASE ;
                      
        Or_SingleLogicalResult_bool( const LHS_TYPE& lhs_, bool rhs_) :
                lhs(lhs_), rhs(rhs_){} ;
        
        inline void apply(){
                if( rhs ){
                        BASE::set( TRUE ) ;
                } else{
                        BASE::set( lhs.get() ) ;
                }
        }
                
private:
        const LHS_TYPE& lhs ;
        bool rhs ;
        
} ;

}
}

template <bool LHS_NA, typename LHS_T, bool RHS_NA, typename RHS_T>
inline Rcpp::sugar::Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,RHS_NA,RHS_T>
operator||( 
        const Rcpp::sugar::SingleLogicalResult<LHS_NA,LHS_T>& lhs, 
        const Rcpp::sugar::SingleLogicalResult<LHS_NA,LHS_T>& rhs
){
        return Rcpp::sugar::Or_SingleLogicalResult_SingleLogicalResult<LHS_NA,LHS_T,RHS_NA,RHS_T>( lhs, rhs ) ;
}
 
template <bool LHS_NA, typename LHS_T>
inline Rcpp::sugar::Or_SingleLogicalResult_bool<LHS_NA,LHS_T>
operator||( 
        const Rcpp::sugar::SingleLogicalResult<LHS_NA,LHS_T>& lhs, 
        bool rhs
){
        return Rcpp::sugar::Or_SingleLogicalResult_bool<LHS_NA,LHS_T>( lhs, rhs ) ;
}

template <bool LHS_NA, typename LHS_T>
inline Rcpp::sugar::Or_SingleLogicalResult_bool<LHS_NA,LHS_T>
operator||( 
        bool rhs, 
        const Rcpp::sugar::SingleLogicalResult<LHS_NA,LHS_T>& lhs
){
        return Rcpp::sugar::Or_SingleLogicalResult_bool<LHS_NA,LHS_T>( lhs, rhs ) ;
}

#endif