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// export.h: Rcpp R/C++ interface class library --
//
// Copyright (C) 2010 - 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__internal__export__h
#define Rcpp__internal__export__h
namespace Rcpp{
namespace internal{
template <typename T>
std::wstring as_string_elt__impl( SEXP x, R_xlen_t i, Rcpp::traits::true_type ){
const char* y = char_get_string_elt( x, i ) ;
return std::wstring(y, y+strlen(y) ) ;
}
template <typename T>
std::string as_string_elt__impl( SEXP x, R_xlen_t i, Rcpp::traits::false_type ){
return char_get_string_elt( x, i ) ;
}
template <typename T>
const std::basic_string< typename Rcpp::traits::char_type<T>::type >
as_string_elt( SEXP x, R_xlen_t i ){
return as_string_elt__impl<T>( x, i, typename Rcpp::traits::is_wide_string<T>::type() ) ;
}
/* iterating */
template <typename InputIterator, typename value_type>
void export_range__impl( SEXP x, InputIterator first, ::Rcpp::traits::false_type ) {
const int RTYPE = ::Rcpp::traits::r_sexptype_traits<value_type>::rtype ;
typedef typename ::Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Shield<SEXP> y( ::Rcpp::r_cast<RTYPE>(x) ) ;
STORAGE* start = ::Rcpp::internal::r_vector_start<RTYPE>(y) ;
std::copy( start, start + ::Rf_xlength(y), first ) ;
}
template <typename InputIterator, typename value_type>
void export_range__impl( SEXP x, InputIterator first, ::Rcpp::traits::true_type ) {
const int RTYPE = ::Rcpp::traits::r_sexptype_traits<value_type>::rtype ;
typedef typename ::Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Shield<SEXP> y( ::Rcpp::r_cast<RTYPE>(x) ) ;
STORAGE* start = ::Rcpp::internal::r_vector_start<RTYPE>(y) ;
std::transform( start, start + ::Rf_xlength(y) , first, caster<STORAGE,value_type> ) ;
}
// implemented in meat
template <typename InputIterator, typename value_type>
void export_range__dispatch( SEXP x, InputIterator first, ::Rcpp::traits::r_type_generic_tag ) ;
template <typename InputIterator, typename value_type>
void export_range__dispatch( SEXP x, InputIterator first, ::Rcpp::traits::r_type_primitive_tag ) {
export_range__impl<InputIterator,value_type>(
x,
first,
typename ::Rcpp::traits::r_sexptype_needscast<value_type>()
);
}
template <typename InputIterator, typename value_type>
void export_range__dispatch( SEXP x, InputIterator first, ::Rcpp::traits::r_type_string_tag ) {
if( ! ::Rf_isString( x) ) {
const char* fmt = "Expecting a string vector: "
"[type=%s; required=STRSXP].";
throw ::Rcpp::not_compatible(fmt, Rf_type2char(TYPEOF(x)) );
}
R_xlen_t n = ::Rf_xlength(x) ;
for( R_xlen_t i=0; i<n; i++, ++first ){
*first = as_string_elt<typename std::iterator_traits<InputIterator>::value_type> ( x, i ) ;
}
}
template <typename InputIterator>
void export_range( SEXP x, InputIterator first ) {
export_range__dispatch<InputIterator,typename std::iterator_traits<InputIterator>::value_type>(
x,
first,
typename ::Rcpp::traits::r_type_traits<typename std::iterator_traits<InputIterator>::value_type>::r_category()
);
}
/* indexing */
template <typename T, typename value_type>
void export_indexing__impl( SEXP x, T& res, ::Rcpp::traits::false_type ) {
const int RTYPE = ::Rcpp::traits::r_sexptype_traits<value_type>::rtype ;
typedef typename ::Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Shield<SEXP> y( ::Rcpp::r_cast<RTYPE>(x) ) ;
STORAGE* start = ::Rcpp::internal::r_vector_start<RTYPE>(y) ;
R_xlen_t size = ::Rf_xlength(y) ;
for( R_xlen_t i=0; i<size; i++){
res[i] = start[i] ;
}
}
template <typename T, typename value_type>
void export_indexing__impl( SEXP x, T& res, ::Rcpp::traits::true_type ) {
const int RTYPE = ::Rcpp::traits::r_sexptype_traits<value_type>::rtype ;
typedef typename ::Rcpp::traits::storage_type<RTYPE>::type STORAGE ;
Shield<SEXP> y( ::Rcpp::r_cast<RTYPE>(x) );
STORAGE* start = ::Rcpp::internal::r_vector_start<RTYPE>(y) ;
R_xlen_t size = ::Rf_xlength(y) ;
for( R_xlen_t i=0; i<size; i++){
res[i] = caster<STORAGE,value_type>(start[i]) ;
}
}
template <typename T, typename value_type>
void export_indexing__dispatch( SEXP x, T& res, ::Rcpp::traits::r_type_primitive_tag ) {
export_indexing__impl<T,value_type>(
x,
res,
typename ::Rcpp::traits::r_sexptype_needscast<value_type>()
);
}
template <typename T, typename value_type>
void export_indexing__dispatch( SEXP x, T& res, ::Rcpp::traits::r_type_string_tag ) {
if( ! ::Rf_isString( x) ) {
const char* fmt = "Expecting a string vector: "
"[type=%s; required=STRSXP].";
throw ::Rcpp::not_compatible(fmt, Rf_type2char(TYPEOF(x)) );
}
R_xlen_t n = ::Rf_xlength(x) ;
for( R_xlen_t i=0; i<n; i++ ){
res[i] = as_string_elt< value_type >( x, i) ;
}
}
template <typename T, typename value_type>
void export_indexing( SEXP x, T& res ) {
export_indexing__dispatch<T,value_type>(
x,
res,
typename ::Rcpp::traits::r_type_traits<value_type>::r_category()
);
}
}
}
#endif
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