merged

simulator_SIC_XE/include/loader.h

@@ -0,0 +1,68 @@
+#ifndef LOADER_H
+#define LOADER_H
+
+#include <memory>
+#include <string>
+#include <vector>
+#include "file_reader.h"
+#include <stdexcept>
+
+class Machine;
+
+using std::shared_ptr;
+using std::string;
+
+
+class Loader {
+public:
+    Loader( shared_ptr<Machine> machine, string filename) : _machine(machine), _filename(filename) {
+        _file_reader = std::make_shared<FileReader>(filename, std::ios::in);
+        if (!_file_reader->good()) {
+            throw std::runtime_error("Loader: failed to open file: " + filename);
+        }
+    }
+    ~Loader();
+
+
+    enum class RecordType {
+        HEADER,
+        TEXT,
+        END,
+        UNKNOWN
+    };
+
+    struct HeaderMetadata {
+        string program_name;
+        int start_address;
+        int length;
+    };
+    struct TextRecord {
+        int start_address;
+        std::vector<uint8_t> data;
+    };
+    struct EndRecord {
+        int execution_start_address;
+    };
+
+    void load();
+
+private :
+
+    static RecordType parseRecordType(char c);
+
+
+    shared_ptr<Machine> _machine;
+    string _filename;
+    shared_ptr<FileReader> _file_reader;
+    HeaderMetadata readHeader();
+    TextRecord readTextRecord();
+    EndRecord readEndRecord();
+    bool load_into_memory(int start_address, const std::vector<uint8_t>& data);
+
+};
+
+
+
+
+
+#endif // LOADER_H