103 lines
5.4 KiB
103 lines
5.4 KiB
#include <cmath>
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#include <boost/variant.hpp>
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#include "src/storage/expressions/UnaryNumericalFunctionExpression.h"
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#include "src/storage/expressions/IntegerLiteralExpression.h"
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#include "src/storage/expressions/DoubleLiteralExpression.h"
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#include "src/utility/macros.h"
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#include "src/exceptions/InvalidTypeException.h"
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namespace storm {
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namespace expressions {
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UnaryNumericalFunctionExpression::UnaryNumericalFunctionExpression(ExpressionManager const& manager, Type const& type, std::shared_ptr<BaseExpression const> const& operand, OperatorType operatorType) : UnaryExpression(manager, type, operand), operatorType(operatorType) {
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// Intentionally left empty.
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}
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UnaryNumericalFunctionExpression::OperatorType UnaryNumericalFunctionExpression::getOperatorType() const {
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return this->operatorType;
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}
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storm::expressions::OperatorType UnaryNumericalFunctionExpression::getOperator() const {
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switch (this->getOperatorType()) {
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case OperatorType::Minus: return storm::expressions::OperatorType::Minus; break;
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case OperatorType::Floor: return storm::expressions::OperatorType::Floor; break;
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case OperatorType::Ceil: return storm::expressions::OperatorType::Ceil; break;
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}
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}
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int_fast64_t UnaryNumericalFunctionExpression::evaluateAsInt(Valuation const* valuation) const {
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STORM_LOG_THROW(this->hasIntegerType(), storm::exceptions::InvalidTypeException, "Unable to evaluate expression as integer.");
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int_fast64_t operandEvaluated = this->getOperand()->evaluateAsInt(valuation);
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switch (this->getOperatorType()) {
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case OperatorType::Minus: return -operandEvaluated; break;
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case OperatorType::Floor: return std::floor(operandEvaluated); break;
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case OperatorType::Ceil: return std::ceil(operandEvaluated); break;
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}
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}
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double UnaryNumericalFunctionExpression::evaluateAsDouble(Valuation const* valuation) const {
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STORM_LOG_THROW(this->hasNumericalType(), storm::exceptions::InvalidTypeException, "Unable to evaluate expression as double.");
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double operandEvaluated = this->getOperand()->evaluateAsDouble(valuation);
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switch (this->getOperatorType()) {
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case OperatorType::Minus: return -operandEvaluated; break;
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case OperatorType::Floor: return std::floor(operandEvaluated); break;
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case OperatorType::Ceil: return std::ceil(operandEvaluated); break;
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}
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}
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std::shared_ptr<BaseExpression const> UnaryNumericalFunctionExpression::simplify() const {
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std::shared_ptr<BaseExpression const> operandSimplified = this->getOperand()->simplify();
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if (operandSimplified->isLiteral()) {
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boost::variant<int_fast64_t, double> operandEvaluation;
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if (operandSimplified->hasIntegerType()) {
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operandEvaluation = operandSimplified->evaluateAsInt();
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} else {
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operandEvaluation = operandSimplified->evaluateAsDouble();
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}
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boost::variant<int_fast64_t, double> result;
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if (operandSimplified->hasIntegerType()) {
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int_fast64_t value = 0;
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switch (this->getOperatorType()) {
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case OperatorType::Minus: value = -boost::get<int_fast64_t>(operandEvaluation); break;
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case OperatorType::Floor: value = std::floor(boost::get<int_fast64_t>(operandEvaluation)); break;
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case OperatorType::Ceil: value = std::ceil(boost::get<int_fast64_t>(operandEvaluation)); break;
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}
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return std::shared_ptr<BaseExpression>(new IntegerLiteralExpression(this->getManager(), value));
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} else {
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double value = 0;
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switch (this->getOperatorType()) {
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case OperatorType::Minus: value = -boost::get<double>(operandEvaluation); break;
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case OperatorType::Floor: value = std::floor(boost::get<double>(operandEvaluation)); break;
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case OperatorType::Ceil: value = std::ceil(boost::get<double>(operandEvaluation)); break;
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}
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return std::shared_ptr<BaseExpression>(new DoubleLiteralExpression(this->getManager(), value));
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}
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}
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if (operandSimplified.get() == this->getOperand().get()) {
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return this->shared_from_this();
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} else {
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return std::shared_ptr<BaseExpression>(new UnaryNumericalFunctionExpression(this->getManager(), this->getType(), operandSimplified, this->getOperatorType()));
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}
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}
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boost::any UnaryNumericalFunctionExpression::accept(ExpressionVisitor& visitor) const {
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return visitor.visit(*this);
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}
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void UnaryNumericalFunctionExpression::printToStream(std::ostream& stream) const {
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switch (this->getOperatorType()) {
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case OperatorType::Minus: stream << "-("; break;
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case OperatorType::Floor: stream << "floor("; break;
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case OperatorType::Ceil: stream << "ceil("; break;
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}
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stream << *this->getOperand() << ")";
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}
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}
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}
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