diff --git a/include/of_path.h b/include/of_path.h
index d01a0ec..0821ea1 100644
--- a/include/of_path.h
+++ b/include/of_path.h
@@ -20,10 +20,12 @@ public:
     static bool exist(const ofString& path);
     static bool write(const ofString& path, const char* data, int len);
     static ofString to_full(const ofString& path);
+    static ofString standardize(const ofString& path);
+    static bool is_same_dir(const ofString& pa, const ofString& pb);
 
     /// @brief 根据通配符获取内容，仅支持通配文件，仅支持 *? 两种通配符。
-    /// @param path 
-    /// @return 
+    /// @param path
+    /// @return
     static ofStrVec match_files(const ofString& path);
 };
 };   // namespace ofen
diff --git a/src/of_path.cpp b/src/of_path.cpp
index ec282aa..689f2af 100644
--- a/src/of_path.cpp
+++ b/src/of_path.cpp
@@ -202,6 +202,56 @@ ofString COfPath::to_full(const ofString& path)
 #endif
 }
 
+ofString COfPath::standardize(const ofString& path)
+{
+    fs::path p(path);
+    auto ret = p.lexically_normal();
+#ifdef UNICODE_OFSTR
+    return ofString(ret.wstring());
+#else
+    return ofString(ret.string());
+#endif
+}
+
+bool COfPath::is_same_dir(const ofString& pa, const ofString& pb)
+{
+    fs::path a(pa);
+    fs::path b(pb);
+
+    ofString stra;
+    ofString strb;
+
+    if (fs::is_regular_file(a)) {
+#ifdef UNICODE_OFSTR
+        stra = a.parent_path().wstring();
+#else
+        stra = a.parent_path().string();
+#endif
+    } else {
+#ifdef UNICODE_OFSTR
+        stra = a.wstring();
+#else
+        stra = a.string();
+#endif
+    }
+
+    if (fs::is_regular_file(b)) {
+#ifdef UNICODE_OFSTR
+        strb = b.parent_path().wstring();
+#else
+        strb = b.parent_path().string();
+#endif
+    } else {
+#ifdef UNICODE_OFSTR
+        strb = b.wstring();
+#else
+        strb = b.string();
+#endif
+    }
+
+    return is_same_path(stra, strb);
+}
+
 ofStrVec COfPath::match_files(const ofString& path)
 {
 #ifdef UNICODE_OFSTR