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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.
*/
/* $Rev$ $Date$ */
#ifndef tuscany_eval_primitive_hpp
#define tuscany_eval_primitive_hpp
/**
* Script evaluator primitive functions.
*/
#include <apr_general.h>
#include <apr_uuid.h>
#include <iostream>
#include "function.hpp"
#include "list.hpp"
#include "value.hpp"
namespace tuscany {
namespace eval {
const value primitiveSymbol("primitive");
const value quoteSymbol("'");
const value lambdaSymbol("lambda");
std::ostream* displayOut = &std::cout;
const bool setupDisplay(std::ostream& out) {
displayOut = &out;
return true;
}
const value carProc(const list<value>& args) {
return car((list<value> )car(args));
}
const value cdrProc(const list<value>& args) {
return cdr((list<value> )car(args));
}
const value consProc(const list<value>& args) {
return cons(car(args), (list<value> )cadr(args));
}
const value listProc(const list<value>& args) {
return args;
}
const value nulProc(const list<value>& args) {
return (bool)isNil(car(args));
}
const value equalProc(const list<value>& args) {
return (bool)(car(args) == cadr(args));
}
const value addProc(const list<value>& args) {
if (isNil(cdr(args)))
return (double)car(args);
return (double)car(args) + (double)cadr(args);
}
const value subProc(const list<value>& args) {
if (isNil(cdr(args)))
return (double)0 - (double)car(args);
return (double)car(args) - (double)cadr(args);
}
const value mulProc(const list<value>& args) {
return (double)car(args) * (double)cadr(args);
}
const value divProc(const list<value>& args) {
return (double)car(args) / (double)cadr(args);
}
const value displayProc(const list<value>& args) {
*displayOut << car(args);
(*displayOut).flush();
return true;
}
const value uuidProc(const list<value>& args) {
apr_uuid_t uuid;
apr_uuid_get(&uuid);
char buf[APR_UUID_FORMATTED_LENGTH];
apr_uuid_format(buf, &uuid);
return std::string(buf, APR_UUID_FORMATTED_LENGTH);
}
const value applyPrimitiveProcedure(const value& proc, list<value>& args, const gc_pool& pool) {
const lambda<value(list<value>&)> func(cadr((list<value>)proc));
return func(args);
}
const bool isPrimitiveProcedure(const value& proc) {
return isTaggedList(proc, primitiveSymbol);
}
const bool isSelfEvaluating(const value& exp) {
if(isNil(exp))
return true;
if(isNumber(exp))
return true;
if(isString(exp))
return true;
if(isBool(exp))
return true;
if(isChar(exp))
return true;
if(isLambda(exp))
return true;
return false;
}
const value primitiveImplementation(const list<value>& proc) {
return car(cdr(proc));
}
template<typename F> const value primitiveProcedure(const F& f) {
return mklist<value>(primitiveSymbol, (lambda<value(list<value>&)>)f);
}
const list<value> primitiveProcedureNames() {
list<value> l = mklist<value>("car");
l = cons<value>("cdr", l);
l = cons<value>("cons", l);
l = cons<value>("list", l);
l = cons<value>("nul", l);
l = cons<value>("=", l);
l = cons<value>("+", l);
l = cons<value>("-", l);
l = cons<value>("*", l);
l = cons<value>("/", l);
l = cons<value>("equal?", l);
l = cons<value>("display", l);
l = cons<value>("uuid", l);
return l;
}
const list<value> primitiveProcedureObjects() {
list<value> l = mklist(primitiveProcedure(carProc));
l = cons(primitiveProcedure(cdrProc), l);
l = cons(primitiveProcedure(consProc), l);
l = cons(primitiveProcedure(listProc), l);
l = cons(primitiveProcedure(nulProc), l);
l = cons(primitiveProcedure(equalProc), l);
l = cons(primitiveProcedure(addProc), l);
l = cons(primitiveProcedure(subProc), l);
l = cons(primitiveProcedure(mulProc), l);
l = cons(primitiveProcedure(divProc), l);
l = cons(primitiveProcedure(equalProc), l);
l = cons(primitiveProcedure(displayProc), l);
l = cons(primitiveProcedure(uuidProc), l);
return l;
}
const bool isFalse(const value& exp) {
return (bool)exp == false;
}
const bool isTrue(const value& exp) {
return (bool)exp == true;
}
const bool isQuoted(const value& exp) {
return isTaggedList(exp, quoteSymbol);
}
const value textOfQuotation(const value& exp) {
return car(cdr((list<value> )exp));
}
const value makeLambda(const list<value>& parameters, const list<value>& body) {
return cons(lambdaSymbol, cons<value>(parameters, body));
}
}
}
#endif /* tuscany_eval_primitive_hpp */
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