From 59759f69bb32632d78567a19fd344d83bcff6eb4 Mon Sep 17 00:00:00 2001
From: Matthew Ellison <m_ellison@ymail.com>
Date: Mon, 30 Apr 2018 12:19:01 -0400
Subject: [PATCH] Created class for Atbash cipher

---
 Headers/Atbash.hpp     | 31 ++++++++++++++++++
 SourceFiles/Atbash.cpp | 74 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 Headers/Atbash.hpp
 create mode 100644 SourceFiles/Atbash.cpp

diff --git a/Headers/Atbash.hpp b/Headers/Atbash.hpp
new file mode 100644
index 0000000..e2cade8
--- /dev/null
+++ b/Headers/Atbash.hpp
@@ -0,0 +1,31 @@
+//Ciphers/Headers/Atbash.hpp
+//Matthew Ellison
+// Created: 4-30-18
+//Modified: 4-30-18
+//This file contains the declaration of the Atbash class
+//This class is used to encode and decode an Atbash cipher
+
+#ifndef ATBASH_HPP
+#define ATBASH_HPP
+
+#include <string>
+
+
+class Atbash{
+private:
+	std::string inputString;
+	std::string outputString;
+public:
+	Atbash();
+	~Atbash();
+	void setInputString(std::string input);
+	std::string getInputString() const;
+	std::string getOutputString() const;
+	std::string encode();
+	std::string encode(std::string input);
+	std::string decode();
+	std::string decode(std::string input);
+	void reset();
+};
+
+#endif //ATBASH_HPP
diff --git a/SourceFiles/Atbash.cpp b/SourceFiles/Atbash.cpp
new file mode 100644
index 0000000..7bb21f0
--- /dev/null
+++ b/SourceFiles/Atbash.cpp
@@ -0,0 +1,74 @@
+//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 = "";
+}