Minimized region files reopen

src/files/files.h

@@ -3,6 +3,7 @@
 
 #include <string>
 #include <vector>
+#include <fstream>
 #include <filesystem>
 #include "../typedefs.h"
 
@@ -11,6 +12,19 @@ namespace json {
 }
 
 namespace files {
+    /* Read-only random access file */
+    class rafile {
+        std::ifstream file;
+        size_t filelength;
+    public:
+        rafile(std::filesystem::path filename);
+
+        void seekg(std::streampos pos);
+        void read(char* buffer, std::streamsize size);
+        size_t length() const;
+    };
+
+
     extern bool write_bytes(std::filesystem::path, const char* data, size_t size);
     extern uint append_bytes(std::filesystem::path, const char* data, size_t size);
     extern bool read(std::filesystem::path, char* data, size_t size);