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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/* $Rev$ $Date$ */
/**
* Currency converter component implementation.
*/
#include "string.hpp"
#include "function.hpp"
#include "list.hpp"
#include "value.hpp"
#include "monad.hpp"
namespace tuscany {
namespace store {
/**
* Convert an amount from USD to a currency.
*/
const failable<value> convert(unused const value& from, const value& to, const value& amount) {
if (to == string("EUR"))
return value(0.70 * (double)amount);
return amount;
}
/**
* Return a currency symbol.
*/
const failable<value> symbol(const value& currency) {
if (currency == string("EUR"))
return value(string("E"));
return value(string("$"));
}
}
}
extern "C" {
const tuscany::value apply(const tuscany::list<tuscany::value>& params) {
const tuscany::value func(car(params));
if (func == "convert")
return tuscany::store::convert(cadr(params), caddr(params), cadddr(params));
if (func == "symbol")
return tuscany::store::symbol(cadr(params));
return tuscany::mkfailure<tuscany::value>();
}
}
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