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ConditionCommand.cpp
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//
// Created by tal on 19/12/2019.
//
#include "ConditionCommand.h"
bool ConditionCommand::IsConditionIsTrue(std::string stringOfCondition) {
string DelimitierOfEqual = "==";
string DelimitierOfBigOrEqual = ">=";
string DelimitierOfSmallOrEqual = "<=";
string DelimitierOfSmall = "<";
string DelimitierOfBig = ">";
string DelimitierOfNotEqual = "!=";
int os = -1;
size_t posOfAllText = 0;
string tokenOfFirsExpression, tokenOfSecondExpression;
//case for "=="
if ((posOfAllText = stringOfCondition.find(DelimitierOfEqual)) != string::npos) {
tokenOfFirsExpression = stringOfCondition.substr(0, posOfAllText);
tokenOfSecondExpression = stringOfCondition.substr(posOfAllText + 2, stringOfCondition.size() - 1);
stringOfCondition.erase(0, posOfAllText + stringOfCondition.length());
os = 1;
}
//case for ">="
else if ((posOfAllText = stringOfCondition.find(DelimitierOfBigOrEqual)) != string::npos) {
tokenOfFirsExpression = stringOfCondition.substr(0, posOfAllText);
tokenOfSecondExpression = stringOfCondition.substr(posOfAllText + 2, stringOfCondition.size() - 1);
stringOfCondition.erase(0, posOfAllText + stringOfCondition.length());
os = 2;
}
//case for "<="
else if ((posOfAllText = stringOfCondition.find(DelimitierOfSmallOrEqual)) != string::npos) {
tokenOfFirsExpression = stringOfCondition.substr(0, posOfAllText);
tokenOfSecondExpression = stringOfCondition.substr(posOfAllText + 2, stringOfCondition.size() - 1);
stringOfCondition.erase(0, posOfAllText + stringOfCondition.length());
os = 3;
}
//case for "!="
else if ((posOfAllText = stringOfCondition.find(DelimitierOfNotEqual)) != string::npos) {
tokenOfFirsExpression = stringOfCondition.substr(0, posOfAllText);
tokenOfSecondExpression = stringOfCondition.substr(posOfAllText + 2, stringOfCondition.size() - 1);
stringOfCondition.erase(0, posOfAllText + stringOfCondition.length());
os = 4;
}
//case for "<"
else if ((posOfAllText = stringOfCondition.find(DelimitierOfSmall)) != string::npos) {
tokenOfFirsExpression = stringOfCondition.substr(0, posOfAllText);
tokenOfSecondExpression = stringOfCondition.substr(posOfAllText + 1, stringOfCondition.size() - 1);
stringOfCondition.erase(0, posOfAllText + stringOfCondition.length());
os = 5;
}
//case for ">"
else if ((posOfAllText = stringOfCondition.find(DelimitierOfBig)) != string::npos) {
tokenOfFirsExpression = stringOfCondition.substr(0, posOfAllText);
tokenOfSecondExpression = stringOfCondition.substr(posOfAllText + 1, stringOfCondition.size() - 1);
stringOfCondition.erase(0, posOfAllText + stringOfCondition.length());
os = 6;
}
switch (os) {
case 1:
if (Variables::getInstance()->doShuntingYard(tokenOfFirsExpression)
== Variables::getInstance()->doShuntingYard(tokenOfSecondExpression))
return true;
break;
case 2:
if (Variables::getInstance()->doShuntingYard(tokenOfFirsExpression)
>= Variables::getInstance()->doShuntingYard(tokenOfSecondExpression))
return true;
break;
case 3:
if (Variables::getInstance()->doShuntingYard(tokenOfFirsExpression)
<= Variables::getInstance()->doShuntingYard(tokenOfSecondExpression))
return true;
break;
case 4:
if (Variables::getInstance()->doShuntingYard(tokenOfFirsExpression)
!= Variables::getInstance()->doShuntingYard(tokenOfSecondExpression))
return true;
break;
case 5:
if (Variables::getInstance()->doShuntingYard(tokenOfFirsExpression)
< Variables::getInstance()->doShuntingYard(tokenOfSecondExpression))
return true;
break;
case 6:
if (Variables::getInstance()->doShuntingYard(tokenOfFirsExpression)
> Variables::getInstance()->doShuntingYard(tokenOfSecondExpression))
return true;
break;
default:break;
}
return false;
}