VariantThree/operator.cpp at master · staddy/VariantThree · GitHub

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#include "operator.h"

#include "complexnumber.h"

Operator::Operator(Operator::Type t_) : m_type{t_} { }

Operator::Operator(char c_) : Operator(charToType(c_)) { }

Operator::Operator(const std::string& s_) : Operator(stringToType(s_)) { }

void Operator::evaluate(Stack<ComplexNumber>& operands_) const {
    ComplexNumber arg1, arg2;
    switch (m_type) {
    case Type::PLUS:
        arg2 = operands_.pop();
        arg1 = operands_.pop();
        operands_.push(arg1 + arg2);
        break;
    case Type::MINUS:
        arg2 = operands_.pop();
        arg1 = operands_.pop();
        operands_.push(arg1 - arg2);
        break;
    case Type::MULTIPLY:
        arg2 = operands_.pop();
        arg1 = operands_.pop();
        operands_.push(arg1 * arg2);
        break;
    case Type::DIVIDE:
        arg2 = operands_.pop();
        arg1 = operands_.pop();
        operands_.push(arg1 / arg2);
        break;
    case Type::REAL:
        arg1 = operands_.pop();
        operands_.push(arg1.real());
        break;
    case Type::IMAGINARY:
        arg1 = operands_.pop();
        operands_.push(ComplexNumber(0.0, arg1.imaginary()));
        break;
    case Type::ABS:
        arg1 = operands_.pop();
        operands_.push(arg1.abs());
        break;
    default:
        break;
    }
}

Operator::Type Operator::charToType(char c_) {
    switch (c_) {
    case '+':
        return Type::PLUS;
    case '-':
        return Type::MINUS;
    case '*':
        return Type::MULTIPLY;
    case '/':
        return Type::DIVIDE;
    case 'R':
        return Type::REAL;
    case 'I':
        return Type::IMAGINARY;
    case 'A':
        return Type::ABS;
    default:
        return Type::NONE;
    }
}

Operator::Type Operator::stringToType(const std::string& s_) {
    if (s_.size() > 0) {
        return charToType(s_[0]);
    }
    return Type::NONE;
}