Make core-buffer folder with all common stuff used in the buffer

core-buffer/include/buffer_utils.hpp

@@ -0,0 +1,35 @@
+#ifndef BUFFER_UTILS_HPP
+#define BUFFER_UTILS_HPP
+
+const size_t FILE_MOD = 1000;
+const size_t FOLDER_MOD = 100000;
+
+std::string get_filename(
+        std::string root_folder,
+        std::string device_name,
+        uint64_t pulse_id)
+{
+    uint64_t folder_base = pulse_id / FOLDER_MOD;
+    folder_base *= FOLDER_MOD;
+
+    uint64_t file_base = pulse_id / FILE_MOD;
+    file_base *= FILE_MOD;
+
+    std::stringstream folder;
+    folder << root_folder << "/";
+    folder << device_name << "/";
+    folder << folder_base << "/";
+    folder << file_base << ".h5";
+
+    return folder.str();
+}
+
+std::size_t get_file_frame_index(uint64_t pulse_id)
+{
+    uint64_t file_base = pulse_id / FILE_MOD;
+    file_base *= FILE_MOD;
+
+    return pulse_id - file_base;
+}
+
+#endif //BUFFER_UTILS_HPP