Made BufferUtils a first class citizen

core-buffer/src/BinaryWriter.cpp

@@ -5,7 +5,7 @@
 #include <cerrno>
 #include <chrono>
 #include <cstring>
-#include <buffer_utils.hpp>
+#include <BufferUtils.hpp>
 #include <fcntl.h>
 
 using namespace std;
@@ -40,14 +40,14 @@ BinaryWriter::~BinaryWriter()
 void BinaryWriter::write(uint64_t pulse_id, const JFFileFormat* buffer)
 {
     auto current_frame_file =
-            get_filename(root_folder_, device_name_, pulse_id);
+            BufferUtils::get_filename(root_folder_, device_name_, pulse_id);
 
     if (current_frame_file != current_output_filename_) {
         open_file(current_frame_file);
     }
 
     size_t n_bytes_offset =
-            get_file_frame_index(pulse_id) * sizeof(JFFileFormat);
+            BufferUtils::get_file_frame_index(pulse_id) * sizeof(JFFileFormat);
 
     auto lseek_result = lseek(output_file_fd_, n_bytes_offset, SEEK_SET);
     if (lseek_result < 0) {

core-buffer/src/BufferUtils.cpp

@@ -0,0 +1,35 @@
+using namespace std;
+
+#include "BufferUtils.hpp"
+#include <sstream>
+
+const size_t BufferUtils::FILE_MOD = 1000;
+const size_t BufferUtils::FOLDER_MOD = 100000;
+
+string BufferUtils::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;
+
+    stringstream folder;
+    folder << root_folder << "/";
+    folder << device_name << "/";
+    folder << folder_base << "/";
+    folder << file_base << ".bin";
+
+    return folder.str();
+}
+
+size_t BufferUtils::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;
+}