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#include <cstddef>
#include <string>
#include <cmath>
#include "include/lexer.hpp"
#include "include/expressions.hpp"
using std::string, std::to_string;
// Literal o constante.
Literal::Literal(int value) : Expression(NULL, NULL, number) {
this->value = value;
}
Literal::~Literal() {}
void Literal::setRepr() {
repr = to_string(value);
}
int Literal::getValue() {
return value;
}
float Literal::eval(int arg) {
return getValue();
}
Expression *Literal::copy() {
return new Literal(value);
}
// Función.
Function::Function(Expression *arg, trig_functions name) : Expression(NULL, NULL, function) {
this->arg = arg;
function_name = name;
}
Function::~Function() {
delTree();
}
const Expression *Function::getArg() const {
return arg;
}
trig_functions Function::getFunctionName() const {
return function_name;
}
void Function::delTree() {
delete arg;
}
float Function::eval(int arg) {
float function_arg = this->arg->eval(arg);
switch(function_name) {
case i_sin:
return std::sin(function_arg);
case i_cos:
return std::cos(function_arg);
case i_tan:
return std::tan(function_arg);
case i_csc:
return std::asin(function_arg);
case i_sec:
return std::acos(function_arg);
default: // Cotangente.
return std::atan(function_arg);
}
}
void Function::setRepr() {
switch(function_name) {
case i_sin:
repr += "sin";
break;
case i_cos:
repr += "cos";
break;
case i_tan:
repr += "tan";
break;
case i_csc:
repr += "csc";
break;
case i_sec:
repr += "sec";
break;
case i_ctg:
repr += "ctg";
break;
}
repr += '(';
repr += arg->getRepr();
repr += ')';
}
Expression *Function::copy() {
return new Function(arg->copy(), function_name);
}
// Variable.
Variable::Variable(char name) : Expression(NULL, NULL, variable) {
this->name = name;
setRepr();
}
Variable::~Variable() {}
void Variable::setRepr() {
repr = string{name};
}
float Variable::eval(int arg) {
return arg;
}
Expression *Variable::copy() {
return new Variable(name);
}
// Suma.
AddExpression::AddExpression(Expression *left, Expression *right)
: Expression(left, right, sum) {}
AddExpression::~AddExpression() {
delTree();
}
float AddExpression::eval(int arg) {
float right_val = right->eval(arg);
float left_val = left->eval(arg);
return right_val + left_val;
}
Expression *AddExpression::copy() {
return new AddExpression(left->copy(), right->copy());
}
// Substracción.
SubExpression::SubExpression(Expression *left, Expression *right)
: Expression(left, right, substraction) {}
SubExpression::~SubExpression() {
delTree();
}
float SubExpression::eval(int arg) {
float right_val = right->eval(arg);
float left_val = left->eval(arg);
return right_val - left_val;
}
Expression *SubExpression::copy() {
return new SubExpression(left->copy(), right->copy());
}
// Negación.
NegationExpression::NegationExpression(Expression *right)
: Expression(NULL, right, substraction) {}
NegationExpression::~NegationExpression() {
delTree();
}
void NegationExpression::setRepr() {
repr = "-(";
repr += right->getRepr() + ")";
}
float NegationExpression::eval(int arg) {
float expr_value = right->eval(arg);
return -1 * expr_value;
}
Expression *NegationExpression::copy() {
return new NegationExpression(right->copy());
}
// División.
DivisionExpression::DivisionExpression(Expression *left, Expression *right)
: Expression(left, right, division) {}
DivisionExpression::~DivisionExpression() {
delTree();
}
float DivisionExpression::eval(int arg) {
float right_val = right->eval(arg);
float left_val = left->eval(arg);
return left_val / right_val;
}
Expression *DivisionExpression::copy() {
return new DivisionExpression(left->copy(), right->copy());
}
// Multiplicación.
MultiplicationExpression::MultiplicationExpression(Expression *left,
Expression *right)
: Expression(left, right, multiplication) {}
MultiplicationExpression::~MultiplicationExpression() {
delTree();
}
float MultiplicationExpression::eval(int arg) {
float right_val = right->eval(arg);
float left_val = left->eval(arg);
return left_val * right_val;
}
Expression *MultiplicationExpression::copy() {
return new MultiplicationExpression(left->copy(), right->copy());
}
// Potencia.
PowerExpression::PowerExpression(Expression *left, Expression *right)
: Expression(left, right, power) {}
PowerExpression::~PowerExpression() {
delTree();
}
float PowerExpression::eval(int arg) {
float right_val = right->eval(arg);
float left_val = left->eval(arg);
return std::pow(left_val, right_val);
}
Expression *PowerExpression::copy() {
return new PowerExpression(left->copy(), right->copy());
}
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