to reduce code size of binary move file to ordinary function

instead of template

src/lib/file.cpp

@@ -0,0 +1,43 @@
+#include <algorithm>
+
+#include <glib.h>
+
+#include "file.hpp"
+
+static void __for_each_file(const std::string& dirname, const std::string& suff,
+                            const List& order_list, const List& disable_list, 
+                            const std::function<void (const std::string&, bool)>& f)
+{
+	GDir *dir = g_dir_open(dirname.c_str(), 0, nullptr);	
+    if (dir) {
+		const gchar *filename;
+
+        while ((filename = g_dir_read_name(dir))!=nullptr) {	
+			const std::string fullfilename(dirname+G_DIR_SEPARATOR_S+filename);
+			if (g_file_test(fullfilename.c_str(), G_FILE_TEST_IS_DIR))
+				__for_each_file(fullfilename, suff, order_list, disable_list, f);
+            else if (g_str_has_suffix(filename, suff.c_str()) &&
+                     std::find(order_list.begin(), order_list.end(), 
+                               fullfilename)==order_list.end()) { 
+                const bool disable = std::find(disable_list.begin(), 
+                                         disable_list.end(), 
+                                         fullfilename)!=disable_list.end();
+                f(fullfilename, disable);
+			}
+		}
+		g_dir_close(dir);
+	}
+}
+
+
+void for_each_file(const List& dirs_list, const std::string& suff,
+                   const List& order_list, const List& disable_list, 
+                   const std::function<void (const std::string&, bool)>& f)
+{
+	for (const std::string & item : order_list) {
+		const bool disable = std::find(disable_list.begin(), disable_list.end(), item) != disable_list.end();
+		f(item, disable);
+	}
+	for (const std::string& item : dirs_list)
+		__for_each_file(item, suff, order_list, disable_list, f);			
+}