// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
//
// RcppNumList.cpp: Rcpp R/C++ interface class library -- numlist support
//
// Copyright (C) 2005 - 2006 Dominick Samperi
// Copyright (C) 2008 - 2009 Dirk Eddelbuettel
//
// 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/>.

#include <RcppNumList.h>

RcppNumList::RcppNumList(SEXP theList) {
    if (!Rf_isNewList(theList))
	throw std::range_error("RcppNumList: non-list passed to constructor");
    len = Rf_length(theList);
    names = Rf_getAttrib(theList, R_NamesSymbol);
    namedList = theList;
}

std::string RcppNumList::getName(int i) const {
    if (i < 0 || i >= len) {
	std::ostringstream oss;
	oss << "RcppNumList::getName: index out of bounds: " << i;
	throw std::range_error(oss.str());
    }
    return std::string(CHAR(STRING_ELT(names,i)));
}

double RcppNumList::getValue(int i) const {
    if (i < 0 || i >= len) {
	std::ostringstream oss;
	oss << "RcppNumList::getValue: index out of bounds: " << i;
	throw std::range_error(oss.str());
    }
    SEXP elt = VECTOR_ELT(namedList, i);
    if (Rf_isReal(elt))
	return REAL(elt)[0];
    else if (Rf_isInteger(elt))
	return (double)INTEGER(elt)[0];
    else
	throw std::range_error("RcppNumList: contains non-numeric value");
    return 0; // never get here
}

int RcppNumList::size() const { 
    return len; 
}