added reading start

simulator_SIC_XE/src/file_reader.cpp

@@ -27,3 +27,9 @@ std::string FileReader::readString(size_t len) {
 }
 
 bool FileReader::good() const { return static_cast<bool>(in); }
+
+std::string FileReader::readLine() {
+    std::string s;
+    if (!std::getline(in, s)) return std::string();
+    return s;
+}

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;
+}

simulator_SIC_XE/src/string_reader.cpp

@@ -25,3 +25,9 @@ std::string StringReader::readString(size_t len) {
     if (static_cast<size_t>(got) < len) s.resize(static_cast<size_t>(got));
     return s;
 }
+
+std::string StringReader::readLine() {
+    std::string s;
+    if (!std::getline(in, s)) return std::string();
+    return s;
+}