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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// proxy.h: Rcpp R/C++ interface class library -- proxies
//
// 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__proxy_h
#define Rcpp__vector__proxy_h
namespace Rcpp{
namespace internal{
template <int RTYPE, template <class> class StoragePolicy>
class simple_name_proxy {
public:
typedef ::Rcpp::Vector<RTYPE, StoragePolicy> VECTOR ;
typedef typename ::Rcpp::traits::storage_type<RTYPE>::type CTYPE ;
simple_name_proxy( VECTOR& v, const std::string& name_) :
parent(v), name(name_){} ;
simple_name_proxy( const simple_name_proxy& other ) :
parent(other.parent), name(other.name){} ;
~simple_name_proxy() {} ;
simple_name_proxy& operator=( CTYPE rhs ){
set( rhs ) ;
return *this ;
}
simple_name_proxy& operator=( const simple_name_proxy& other){
set( other.get() ) ;
return *this ;
}
template <typename T>
simple_name_proxy& operator=( const T& rhs ){
set( caster<T,CTYPE>(rhs) ) ;
return *this ;
}
// TODO: other operators +=, -=, ...
operator CTYPE() const {
return get() ;
}
// this helps wrap, for example : wrap( x["foo"] )
operator SEXP() const {
return ::Rcpp::wrap(get()) ;
}
private:
VECTOR& parent ;
std::string name;
void set( CTYPE rhs ){
R_xlen_t index = 0 ;
try{
index = parent.offset(name) ;
parent[ index ] = rhs ;
} catch( const index_out_of_bounds& ex ){
parent.push_back( rhs, name );
}
}
CTYPE get() const {
return parent[ parent.offset(name) ];
}
} ;
template <int RTYPE, template <class> class StoragePolicy>
class string_name_proxy{
public:
typedef typename ::Rcpp::Vector<RTYPE, StoragePolicy> VECTOR ;
typedef const char* iterator ;
typedef const char& reference ;
string_name_proxy( VECTOR& v, const std::string& name_) :
parent(v), name(name_){} ;
string_name_proxy( const string_name_proxy& other ) :
parent(other.parent), name(other.name){} ;
~string_name_proxy(){} ;
string_name_proxy& operator=( const std::string& rhs ){
set( rhs ) ;
return *this ;
}
string_name_proxy& operator=( const string_name_proxy& other){
set( other.get() ) ;
return *this ;
}
operator char* () const {
return get() ;
}
operator SEXP() const {
return ::Rf_mkString(get()) ;
}
inline iterator begin() { return get() ; }
inline iterator end(){ return begin() + size() ; }
inline reference operator[]( R_xlen_t i ){ return *( get() + i ) ; }
inline R_xlen_t size(){ return strlen( get() ) ; }
private:
VECTOR& parent ;
std::string name;
void set( const std::string& rhs ){
R_xlen_t index = 0 ;
try{
index = parent.offset(name) ;
parent[ index ] = rhs ;
} catch( const index_out_of_bounds& ex ){
parent.push_back( rhs, name );
}
}
char* get() const {
return parent[ parent.offset(name) ];
}
} ;
template <int RTYPE, template <class> class StoragePolicy>
class generic_name_proxy {
public:
typedef ::Rcpp::Vector<RTYPE, StoragePolicy> VECTOR ;
generic_name_proxy( VECTOR& v, const std::string& name_) :
parent(v), name(name_){}
generic_name_proxy( const generic_name_proxy& other ) :
parent(other.parent), name(other.name){}
~generic_name_proxy(){} ;
generic_name_proxy& operator=( SEXP rhs ){
set( rhs ) ;
return *this ;
}
generic_name_proxy& operator=( const generic_name_proxy& other){
set( other.get() ) ;
return *this ;
}
template <typename T>
generic_name_proxy& operator=( const T& rhs ){
set(Shield<SEXP>(wrap(rhs)));
return *this ;
}
// TODO: other operators +=, -=, ...
operator SEXP() const {
return get() ;
}
template <typename T>
operator T() const {
#if RCPP_DEBUG_LEVEL > 0
SEXP res = get() ;
RCPP_DEBUG_1( "generic_name_proxy::get() = <%p> ", res ) ;
return ::Rcpp::as<T>( res ) ;
#else
return ::Rcpp::as<T>( get() ) ;
#endif
}
private:
VECTOR& parent ;
std::string name;
void set( SEXP rhs ){
R_xlen_t index = 0 ;
try{
index = parent.offset(name) ;
parent[ index ] = rhs ;
} catch( const index_out_of_bounds& ex ){
parent.push_back( rhs, name );
}
}
SEXP get() const {
return parent[ parent.offset(name) ];
}
} ;
}
namespace traits {
template <int RTYPE, template <class> class StoragePolicy>
struct r_vector_name_proxy{
typedef typename ::Rcpp::internal::simple_name_proxy<RTYPE, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_name_proxy<STRSXP, StoragePolicy>{
typedef ::Rcpp::internal::string_name_proxy<STRSXP, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_name_proxy<VECSXP, StoragePolicy>{
typedef ::Rcpp::internal::generic_name_proxy<VECSXP, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_name_proxy<EXPRSXP, StoragePolicy>{
typedef ::Rcpp::internal::generic_name_proxy<EXPRSXP, StoragePolicy> type ;
} ;
template <int RTYPE, template <class> class StoragePolicy>
struct r_vector_proxy{
typedef typename storage_type<RTYPE>::type& type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_proxy<STRSXP, StoragePolicy> {
typedef ::Rcpp::internal::string_proxy<STRSXP, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_proxy<EXPRSXP, StoragePolicy> {
typedef ::Rcpp::internal::generic_proxy<EXPRSXP, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_proxy<VECSXP, StoragePolicy> {
typedef ::Rcpp::internal::generic_proxy<VECSXP, StoragePolicy> type ;
} ;
template <int RTYPE, template <class> class StoragePolicy>
struct r_vector_const_proxy{
typedef const typename storage_type<RTYPE>::type& type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_const_proxy<STRSXP, StoragePolicy> {
typedef ::Rcpp::internal::const_string_proxy<STRSXP, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_const_proxy<VECSXP, StoragePolicy> {
typedef ::Rcpp::internal::const_generic_proxy<VECSXP, StoragePolicy> type ;
} ;
template<template <class> class StoragePolicy>
struct r_vector_const_proxy<EXPRSXP, StoragePolicy> {
typedef ::Rcpp::internal::const_generic_proxy<EXPRSXP, StoragePolicy> type ;
} ;
template <int RTYPE, template <class> class StoragePolicy>
struct r_vector_iterator {
typedef typename storage_type<RTYPE>::type* type ;
};
template <int RTYPE, template <class> class StoragePolicy>
struct r_vector_const_iterator {
typedef const typename storage_type<RTYPE>::type* type ;
};
template <int RTYPE, template <class> class StoragePolicy>
struct proxy_based_iterator{
typedef ::Rcpp::internal::Proxy_Iterator< typename r_vector_proxy<RTYPE, StoragePolicy>::type > type ;
} ;
template<template <class> class StoragePolicy> struct r_vector_iterator<VECSXP, StoragePolicy> : proxy_based_iterator<VECSXP, StoragePolicy>{} ;
template<template <class> class StoragePolicy> struct r_vector_iterator<EXPRSXP, StoragePolicy> : proxy_based_iterator<EXPRSXP, StoragePolicy>{} ;
template<template <class> class StoragePolicy> struct r_vector_iterator<STRSXP, StoragePolicy> : proxy_based_iterator<STRSXP, StoragePolicy>{} ;
template <int RTYPE, template <class> class StoragePolicy>
struct proxy_based_const_iterator{
typedef ::Rcpp::internal::Proxy_Iterator< typename r_vector_const_proxy<RTYPE, StoragePolicy>::type > type ;
} ;
template<template <class> class StoragePolicy> struct r_vector_const_iterator<VECSXP, StoragePolicy> : proxy_based_const_iterator<VECSXP, StoragePolicy>{} ;
template<template <class> class StoragePolicy> struct r_vector_const_iterator<EXPRSXP, StoragePolicy> : proxy_based_const_iterator<EXPRSXP, StoragePolicy>{} ;
template<template <class> class StoragePolicy> struct r_vector_const_iterator<STRSXP, StoragePolicy> : proxy_based_const_iterator<STRSXP, StoragePolicy>{} ;
} // traits
}
#endif
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