CipherStream/SourceFiles/Atbash.cpp

//Ciphers/SourceFiles/Atbash.cpp
//Matthew Ellison
// Created: 4-30-18
//Modified: 4-30-18
//This file contains the implementation of the Atbash class


#include "../Headers/Atbash.hpp"
#include <cctype>

Atbash::Atbash(){
}

Atbash::~Atbash(){
}

void Atbash::setInputString(std::string input){
	//Make sure inputString is empty
	reset();
	//Strip all punctuation and whitespace from input and make all letters capital
	for(int cnt = 0;cnt < input.size();++cnt){
		char letter = input[cnt];
		//If it is upper case add it to the inputString
		if(isupper(letter)){
			inputString += letter;
		}
		//If it is lower case make it upper case and add it to the inputString
		else if(islower(letter)){
			inputString += toupper(letter);
		}
		//If it is anything else ignore it
	}
}

std::string Atbash::getInputString() const{
	return inputString;
}

std::string Atbash::getOutputString() const{
	return outputString;
}

std::string Atbash::encode(){
	//Step through every element in the inputString and shift it the correct amount
	for(int cnt = 0;cnt < inputString.size();++cnt){
		outputString += (inputString[cnt] + 25 - (2 * (inputString[cnt] - 'A')));
	}

	return outputString;
}

std::string Atbash::encode(std::string input){
	setInputString(input);
	return encode();
}

std::string Atbash::decode(){
	//Make sure outputString is empty
	outputString = "";
	for(int cnt = 0;cnt < inputString.size();++cnt){
		outputString += (inputString[cnt] + 25 - (2 * (inputString[cnt] - 'A')));
	}

	return outputString;
}

std::string Atbash::decode(std::string input){
	setInputString(input);
	return decode();
}

void Atbash::reset(){
	inputString = outputString = "";
}