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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// traits.h: Rcpp R/C++ interface class library -- support traits for vector
//
// Copyright (C) 2010 - 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__vector__traits_h
#define Rcpp__vector__traits_h
namespace Rcpp{
namespace traits{
template <int RTYPE, template <class> class StoragePolicy = PreserveStorage >
class r_vector_cache{
public:
typedef typename ::Rcpp::Vector<RTYPE, StoragePolicy> VECTOR ;
typedef typename r_vector_iterator<RTYPE>::type iterator ;
typedef typename r_vector_const_iterator<RTYPE>::type const_iterator ;
typedef typename r_vector_proxy<RTYPE>::type proxy ;
typedef typename r_vector_const_proxy<RTYPE>::type const_proxy ;
typedef typename storage_type<RTYPE>::type storage_type ;
r_vector_cache() : start(0){} ;
inline void update( const VECTOR& v ) {
start = ::Rcpp::internal::r_vector_start<RTYPE>(v) ;
}
inline iterator get() const { return start; }
inline const_iterator get_const() const { return start; }
inline proxy ref() { return *start ;}
inline proxy ref(R_xlen_t i) { return start[i] ; }
inline proxy ref() const { return *start ;}
inline proxy ref(R_xlen_t i) const { return start[i] ; }
private:
iterator start ;
} ;
template <int RTYPE, template <class> class StoragePolicy = PreserveStorage>
class proxy_cache{
public:
typedef typename ::Rcpp::Vector<RTYPE, StoragePolicy> VECTOR ;
typedef typename r_vector_iterator<RTYPE, StoragePolicy>::type iterator ;
typedef typename r_vector_const_iterator<RTYPE, StoragePolicy>::type const_iterator ;
typedef typename r_vector_proxy<RTYPE, StoragePolicy>::type proxy ;
typedef typename r_vector_const_proxy<RTYPE, StoragePolicy>::type const_proxy ;
proxy_cache(): p(0){}
~proxy_cache(){}
void update( const VECTOR& v ){
p = const_cast<VECTOR*>(&v) ;
}
inline iterator get() const { return iterator( proxy(*p, 0 ) ) ;}
// inline const_iterator get_const() const { return const_iterator( *p ) ;}
inline const_iterator get_const() const { return const_iterator( const_proxy(*p, 0) ) ; }
inline proxy ref() { return proxy(*p,0) ; }
inline proxy ref(R_xlen_t i) { return proxy(*p,i);}
inline const_proxy ref() const { return const_proxy(*p,0) ; }
inline const_proxy ref(R_xlen_t i) const { return const_proxy(*p,i);}
private:
VECTOR* p ;
} ;
// regular types for INTSXP, REALSXP, ...
template <int RTYPE, template <class> class StoragePolicy = PreserveStorage>
struct r_vector_cache_type {
typedef r_vector_cache<RTYPE, StoragePolicy> type ;
} ;
// proxy types for VECSXP, STRSXP and EXPRSXP
template <template <class> class StoragePolicy>
struct r_vector_cache_type<VECSXP, StoragePolicy> {
typedef proxy_cache<VECSXP, StoragePolicy> type ;
} ;
template <template <class> class StoragePolicy>
struct r_vector_cache_type<EXPRSXP, StoragePolicy> {
typedef proxy_cache<EXPRSXP, StoragePolicy> type ;
} ;
template <template <class> class StoragePolicy>
struct r_vector_cache_type<STRSXP, StoragePolicy> {
typedef proxy_cache<STRSXP, StoragePolicy> type ;
} ;
} // traits
}
#endif
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