added reading start

simulator_SIC_XE/src/loader.cpp

@@ -0,0 +1,35 @@
+#include "loader.h"
+#include "file_reader.h"
+
+Loader::~Loader()
+{
+    _machine.reset();
+}
+
+
+
+
+void Loader::load()
+{
+      
+
+}
+
+Loader::RecordType Loader::parseRecordType(char c)
+{
+    switch (c) {
+        case 'H': return RecordType::HEADER;
+        case 'T': return RecordType::TEXT;
+        case 'E': return RecordType::END;
+        default: return RecordType::UNKNOWN; // fallback; adjust as needed
+    }
+}
+
+Loader::HeaderMetadata Loader::readHeader()
+{
+    RecordType type = parseRecordType(static_cast<char>(_file_reader->readByte()));
+    if (type != RecordType::HEADER) {
+        throw std::runtime_error("Expected HEADER record");
+    }
+    HeaderMetadata header;
+}