Homework2 (#3)

* Lab1

* updating

* commiting for merge into develop

6 files changed, 414 insertions, 0 deletions

diff --git a/CST 126/Homework2/Base64Converter.hpp b/CST 126/Homework2/Base64Converter.hpp
new file mode 100644
index 0000000..73980ed
--- /dev/null
+++ b/CST 126/Homework2/Base64Converter.hpp
@@ -0,0 +1,117 @@
+#ifndef BASE64_CONVERTER
+#define BASE64_CONVERTER
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using std::string;
+using std::vector;
+
+typedef unsigned char UC;
+typedef unsigned int UI;
+#define EXTRA '^'
+#define MASK1 0xfc
+#define MASK2 0x03
+#define MASK3 0xf0
+#define MASK4 0x0f
+#define MASK5 0xc0
+#define MASK6 0x3f
+#define MASK7 0x30
+#define MASK8 0x3c
+
+const string characterMap = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+inline string Base64Encode(UC const* buffer, size_t& size)
+{
+    string encoded = "";
+
+    UI i = 0,
+	j = 0,
+	k = 0;
+
+    UC temp_a_3[3],
+	temp_4[4];
+
+    for (i = 0; i < size; i += 3) {
+
+        for (j = i, k = 0; j < size && j < i + 3; j++) 
+            temp_a_3[k++] = *(buffer++);
+
+        for (; k < 3; k++) 
+            temp_a_3[k] = '\0';
+
+        temp_4[0] = (temp_a_3[0] & MASK1) >> 2;
+        temp_4[1] = ((temp_a_3[0] & MASK2) << 4) + ((temp_a_3[1] & MASK3) >> 4);
+        temp_4[2] = ((temp_a_3[1] & MASK4) << 2) + ((temp_a_3[2] & MASK5) >> 6);
+        temp_4[3] = temp_a_3[2] & MASK6;
+
+        for (j = i, k = 0; j < size + 1 && j < i + 4; j++, k++)
+            encoded += characterMap[temp_4[k]];
+
+        for (; k < 4; k++) 
+            encoded += EXTRA;
+    }
+
+    return encoded;
+}
+
+inline vector<UC> Base64Decoder(string const& encoded)
+{
+    UI i = 0,
+	j = 0,
+	k = 0,
+	in_len = encoded.size();
+
+    UC temp_a_3[3],
+	temp_4[4];
+
+    vector<UC> decoded;
+
+    for (i = 0; i < in_len; i += 4) {
+
+        for (j = i, k = 0; j < i + 4 && encoded[j] != EXTRA; j++)
+            temp_4[k++] = characterMap.find(encoded[j]);
+
+        for (; k < 4; k++) 
+            temp_4[k++] = '\0';
+
+        temp_a_3[0] = (temp_4[0] << 2) + ((temp_4[1] & MASK7) >> 4);
+        temp_a_3[1] = ((temp_4[1] & MASK4) << 4) + ((temp_4[2] & MASK8) >> 2);
+        temp_a_3[2] = ((temp_4[2] & MASK2) << 6) + temp_4[3];
+
+        for (j = i, k = 0; k < 3 && encoded[j + 1] != EXTRA; j++, k++)
+            decoded.push_back(temp_a_3[k]);
+    }
+
+    return decoded;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+#endif
\ No newline at end of file
diff --git a/CST 126/Homework2/Homework2.vcxproj b/CST 126/Homework2/Homework2.vcxproj
index a7c6d6c..cf0cae3 100644
--- a/CST 126/Homework2/Homework2.vcxproj
+++ b/CST 126/Homework2/Homework2.vcxproj
@@ -132,6 +132,13 @@
   <ItemGroup>
     <None Include="FindingPi.exe" />
   </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Base64Converter.hpp" />
+    <ClInclude Include="helpers.hpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <Text Include="destination_file.txt" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
diff --git a/CST 126/Homework2/Homework2.vcxproj.filters b/CST 126/Homework2/Homework2.vcxproj.filters
index 6328c74..296f0a3 100644
--- a/CST 126/Homework2/Homework2.vcxproj.filters
+++ b/CST 126/Homework2/Homework2.vcxproj.filters
@@ -24,4 +24,17 @@
       <Filter>Source Files</Filter>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="Base64Converter.hpp">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="helpers.hpp">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <Text Include="destination_file.txt">
+      <Filter>Source Files</Filter>
+    </Text>
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/CST 126/Homework2/destination_file.txt b/CST 126/Homework2/destination_file.txt
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/CST 126/Homework2/destination_file.txt
diff --git a/CST 126/Homework2/helpers.hpp b/CST 126/Homework2/helpers.hpp
new file mode 100644
index 0000000..a9531ec
--- /dev/null
+++ b/CST 126/Homework2/helpers.hpp
@@ -0,0 +1,134 @@
+#ifndef HELPERS_H
+#define HELPERS_H
+
+#include <fstream>
+#include <vector>
+#include <string>
+
+using namespace std;
+
+//file reading things
+inline string ReadTextFromFile(const char* fileName, string buffer)
+{
+	std::ifstream file(fileName);
+
+	unsigned char temporary;
+
+	if (!file.is_open())
+	{
+		std::cerr << "Could not open file for text input: " << fileName;
+		return buffer;
+	}
+
+	while (getline(file, buffer))
+		buffer += buffer;
+
+	file.close();
+
+	return buffer;
+}
+
+inline vector<unsigned char> ReadFileAsBinary(const char* fileName, vector<unsigned char> buffer)
+{
+	try
+	{
+		//open the fstream in input mode, with binary mode
+		std::fstream file(fileName, std::ios::in | std::ios::binary);
+
+		unsigned char temporary;
+
+		if (!file.is_open())
+		{
+			std::cerr << "Could not open file for binary input: " << fileName;
+			return buffer;
+		}
+
+		while (file >> temporary)
+		{
+			buffer.push_back(temporary);
+		}
+
+		file.close();
+
+		return buffer;
+	}
+	catch (const std::exception& ex)
+	{
+		std::cerr << "Exception during binary file input." << fileName <<
+			"was not successfully streamed to binary." << ex.what();
+
+
+		return buffer;
+	}
+}
+
+
+//file writing things
+inline bool WriteTextToFile(const char* fileName, const string fileContents)
+{
+	std::ofstream file(fileName);
+
+	if(!file.is_open())
+	{
+		std::cerr << "Could not open file: " << fileName;
+		return false;
+	}
+
+	file << fileContents;
+
+	file.close();
+
+	return true;
+}
+
+inline bool WriteFileFromBinary(const char* fileName, vector<unsigned char> buffer)
+{
+	std::ofstream file(fileName);
+	int count = 0;
+
+	if (!file.is_open())
+	{
+		std::cerr << "Could not open file: " << fileName;
+		return false;
+	}
+
+	for (auto const& x : buffer) {
+		file << x;
+		count = count + 1;
+		if (count == 99) {
+			file << "\n";
+			count = 0;
+		}
+	}
+
+	file.close();
+
+
+	return true;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+#endif
\ No newline at end of file
diff --git a/CST 126/Homework2/program.cpp b/CST 126/Homework2/program.cpp
index e69de29..fb5e8c5 100644
--- a/CST 126/Homework2/program.cpp
+++ b/CST 126/Homework2/program.cpp
@@ -0,0 +1,143 @@
+// Name: Wesley Richelderfer
+// Class: CST 126
+// Date: 4/27/24
+// Assignment: Homework 2
+
+#include <iostream>
+#include <string>
+
+#include "helpers.hpp"
+#include "Base64Converter.hpp"
+
+using std::string;
+
+constexpr short ARG_COUNT = 4;
+
+bool Worker();
+bool Worker(char** argv);
+
+
+int main (const int argc, char* argv[])
+{
+
+	if(argc == ARG_COUNT)
+	{
+		//run command line version
+		Worker(argv);
+	}
+
+
+	//console app version
+	return Worker();
+}
+
+bool Worker()
+{
+	//files and choice
+	char option;
+	string destination;
+	string source;
+
+	//variables for switch statement
+	bool success;
+	vector<unsigned char> buffer;
+	string product;
+	size_t size = 0;
+
+	cout << "Would you like to encode or decode? (e or d): ";
+	cin >> option;
+	cout << "\n\nWhat is the source file name? ";
+	cin >> source;
+	cout << "\n\nWhat is the destination file name? ";
+	cin >> destination;
+
+	const char* arg2 = source.c_str();
+	const char* arg3 = destination.c_str();
+
+	switch (option)
+	{
+	case 'e':
+
+		buffer = ReadFileAsBinary(arg2, buffer);
+
+		size = buffer.size();
+
+		product = Base64Encode(&buffer[0], size);
+
+		success = WriteTextToFile(arg3, product);
+
+		return success;
+		
+	case 'd':
+
+		ReadTextFromFile(arg2, product);
+
+		buffer = Base64Decoder(product);
+
+		success = WriteFileFromBinary(arg3, buffer);
+
+		return success;
+		
+	default:
+		std::cerr << "Invalid command option\n" <<
+			"Valid commands:\n" <<
+			"\t-e source_file.exe destination_file.exe" <<
+			"\t\tEncodes file in source into text in destination txt file." <<
+			"\t-d source_file.txt destination_file.exe" <<
+			"\t\tDecodes text in source file into the destination file.\n\n";
+		return false;
+	}
+}
+
+bool Worker(char** argv)
+{
+	//files and choice
+	const char* arg1 = argv[1];  //-e -d
+	const char* arg2 = argv[2];  //source file name
+	const char* arg3 = argv[3];  //destination file name
+
+	const char option = arg1[1]; //e or d
+
+	//variables for switch statement
+	bool success;
+	vector<unsigned char> buffer;
+	string product;
+	size_t size = 0;
+
+	switch(option)
+	{
+	case 'e':
+		
+		buffer = ReadFileAsBinary(arg2, buffer);
+
+		size = buffer.size();
+		
+		product = Base64Encode(&buffer[0], size);
+
+		success = WriteTextToFile(arg3, product);
+
+		return success;
+
+	case 'd':
+
+		ReadTextFromFile(arg2, product);
+
+		buffer = Base64Decoder(product);
+
+		success = WriteFileFromBinary(arg3, buffer);
+
+		return success;
+
+	default:
+
+		std::cerr << "Invalid command option\n" <<
+			"Valid commands:\n" <<
+			"\t-e source_file.exe destination_file.exe" <<
+			"\t\tEncodes file in source into text in destination txt file." <<
+			"\t-d source_file.txt destination_file.exe" <<
+			"\t\tDecodes text in source file into the destination file.\n\n";
+
+		return false;
+
+	}
+}
\ No newline at end of file