utility: creating directories with boost in FileSystem method

src/lib/utility/file/FileSystem.cpp

@@ -159,6 +159,11 @@ bool FileSystem::equivalent(const std::string& pathA, const std::string& pathB)
 	return boost::filesystem::path(pathA).compare(boost::filesystem::path(pathB)) == 0;
 }
 
+void FileSystem::createDirectory(const FilePath& path)
+{
+	boost::filesystem::create_directory(path.str());
+}
+
 std::vector<FilePath> FileSystem::getSubDirectories(const FilePath &path)
 {
 	std::vector<FilePath> v;

src/lib/utility/file/FileSystem.h

@@ -23,6 +23,7 @@ public:
 	static TimePoint getLastWriteTime(const FilePath& filePath);
 	static std::string getTimeStringNow();
 
+	static void createDirectory(const FilePath& path);
 	static std::vector<FilePath> getSubDirectories(const FilePath& path);
 
 	static bool exists(const std::string& path);

src/lib/utility/logging/FileLogger.cpp

@@ -1,9 +1,10 @@
 #include "FileLogger.h"
 
-#include <direct.h>
 #include <fstream>
 #include <sstream>
 
+#include "utility/file/FileSystem.h"
+
 std::string FileLogger::s_filePath = "data/log/";
 
 FileLogger::FileLogger()
@@ -56,7 +57,7 @@ void FileLogger::createDirectory()
 {
 	if (s_filePath.length() > 0)
 	{
-		mkdir(s_filePath.c_str());
+		FileSystem::createDirectory(s_filePath);
 	}
 }