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// value.cpp
// Copyright (c) 2018 Ni Kesu. All rights reserved.
#include <iostream>
#include <cassert>
#include "value.h"
#include "variable.h"
using std::string;
Value::Value(std::string name, ValueType type, BigInt *intValue,
double *doubleValue, bool isLvalue)
: name_(name), type_(type), intValue_(intValue),
doubleValue_(doubleValue), isLvalue_(isLvalue)
{
}
Value::Value(const BigInt & n)
{
type_ = V_BIGINT;
intValue_ = new BigInt(n);
doubleValue_ = nullptr;
isLvalue_ = false;
}
Value::Value(const double & n)
{
type_ = V_DOUBLE;
intValue_ = nullptr;
doubleValue_ = new double(n);
isLvalue_ = false;
}
Value::Value(const bool & n)
{
intValue_ = nullptr;
doubleValue_ = nullptr;
*this = static_cast<BigInt>(n);
}
Value::Value(const Value & n) : type_(n.type_), isLvalue_(n.isLvalue_)
{
if (isLvalue_) {
intValue_ = n.intValue_;
doubleValue_ = n.doubleValue_;
}
else {
if (type_ == V_BIGINT) {
intValue_ = new BigInt(*n.intValue_);
doubleValue_ = nullptr;
}
else if (type_ == V_DOUBLE) {
intValue_ = nullptr;
doubleValue_ = new double(*n.doubleValue_);
}
}
}
Value::~Value()
{
if (!isLvalue_) {
delete intValue_;
delete doubleValue_;
}
}
Value & Value::operator=(const Value & n)
{
if (this == &n) {
return *this;
}
else {
if (!isLvalue_) {
delete intValue_;
delete doubleValue_;
}
type_ = n.type_;
isLvalue_ = n.isLvalue_;
if (isLvalue_) {
intValue_ = n.intValue_;
doubleValue_ = n.doubleValue_;
}
else {
if (type_ == V_BIGINT) {
intValue_ = new BigInt(*n.intValue_);
doubleValue_ = nullptr;
}
else if (type_ == V_DOUBLE) {
intValue_ = nullptr;
doubleValue_ = new double(*n.doubleValue_);
}
}
return *this;
}
}
ValueType Value::type() const
{
return type_;
}
BigInt Value::intValue() const
{
return *intValue_;
}
double Value::doubleValue() const
{
return *doubleValue_;
}
bool Value::isLvalue() const
{
return isLvalue_;
}
bool Value::setType(ValueType type)
{
type_ = type;
return true;
}
bool Value::setValue(const BigInt & n)
{
if (!isLvalue_) {
std::cerr << " in setValue: n is not a lvalue!";
exit(-1);
}
if (type_ == V_BIGINT) {
*intValue_ = n;
}
else if (type_ == V_DOUBLE) {
*doubleValue_ = static_cast<double>(n);
}
else {
std::cerr << "in setValue: wrong type";
exit(-1);
}
return true;
}
bool Value::setValue(const double & n)
{
if (!isLvalue_) {
std::cerr << " in setValue: n is not a lvalue!";
exit(-1);
}
if (type_ == V_BIGINT) {
*intValue_ = static_cast<BigInt>(n);
}
else if (type_ == V_DOUBLE) {
*doubleValue_ = n;
}
else {
std::cerr << "in setValue: wrong type";
exit(-1);
}
return true;
}
Value toValue(const Token & n)
{
if (n.type == T_LITERAL) {
for (const auto &c : n.str) {
if (c == '.') {
return Value(strtod(n.str.c_str(), nullptr));
}
}
return Value(BigInt(n.str));
}
else if (n.type == T_IDENTIFIER) {
for (auto & v : variableList) {
if (v.name() == n.str) {
return Value(v.name(), v.type(), v.intValue(), v.doubleValue(), true);
}
}
variableList.push_back(Variable(n.str, V_NA, ZERO, 0.0));
return Value(variableList.back().name(),
variableList.back().type(),
variableList.back().intValue(),
variableList.back().doubleValue(),
true);
}
else {
// TODO
return Value(ZERO);
}
}