created basic simulator

ass2/FileDevice.cpp

@@ -0,0 +1,44 @@
+#include "FileDevice.h"
+#include <iostream>
+
+FileDevice::FileDevice(const std::string& fname) : filename(fname) {
+    file.open(filename, std::ios::in | std::ios::out | std::ios::binary);
+    
+    if (!file.is_open()) {
+        file.clear();
+        file.open(filename, std::ios::out | std::ios::binary);
+        file.close();
+        file.open(filename, std::ios::in | std::ios::out | std::ios::binary);
+    }
+}
+
+FileDevice::~FileDevice() {
+    if (file.is_open()) {
+        file.close();
+    }
+}
+
+bool FileDevice::test() const {
+    return file.is_open() && file.good();
+}
+
+uint8_t FileDevice::read() {
+    char c;
+    if (file.is_open()) {
+        if (file.get(c)) {
+            uint8_t byte = (uint8_t)c;
+            return byte;
+        } else {
+            return 0;
+        }
+    }
+    return 0;
+}
+
+void FileDevice::write(uint8_t value) {
+    if (file.is_open()) {
+        char c = (char)value;
+        file.put(c);
+        file.flush();
+    }
+}