diff --git a/src/loaders/lottie/tvgLottieLoader.cpp b/src/loaders/lottie/tvgLottieLoader.cpp
index 140da341..262bb8de 100644
--- a/src/loaders/lottie/tvgLottieLoader.cpp
+++ b/src/loaders/lottie/tvgLottieLoader.cpp
@@ -39,16 +39,6 @@ static bool _checkDotLottie(const char *str)
 }
 
 
-static int _str2int(const char* str, int len)
-{
-    int ret = 0;
-    for(int i = 0; i < len; ++i) {
-        ret = ret * 10 + (str[i] - '0');
-    }
-    return ret;
-}
-
-
 static int _str2float(const char* str, int len)
 {
     auto tmp = strDuplicate(str, len);
@@ -149,7 +139,7 @@ bool LottieLoader::header()
             p += 4;
             auto e = strstr(p, ",");
             if (!e) e = strstr(p, "}");
-            w = static_cast<float>(_str2int(p, e - p));
+            w = static_cast<float>(str2int(p, e - p));
             p = e;
             continue;
         }
@@ -158,7 +148,7 @@ bool LottieLoader::header()
             p += 4;
             auto e = strstr(p, ",");
             if (!e) e = strstr(p, "}");
-            h = static_cast<float>(_str2int(p, e - p));
+            h = static_cast<float>(str2int(p, e - p));
             p = e;
             continue;
         }
diff --git a/src/utils/tvgStr.cpp b/src/utils/tvgStr.cpp
index 0e6ca953..eeed4fc4 100644
--- a/src/utils/tvgStr.cpp
+++ b/src/utils/tvgStr.cpp
@@ -205,6 +205,15 @@ error:
 }
 
 
+int str2int(const char* str, size_t n)
+{
+    int ret = 0;
+    for(size_t i = 0; i < n; ++i) {
+        ret = ret * 10 + (str[i] - '0');
+    }
+    return ret;
+}
+
 char* strDuplicate(const char *str, size_t n)
 {
     auto len = strlen(str);
@@ -217,4 +226,14 @@ char* strDuplicate(const char *str, size_t n)
     return (char *) memcpy(ret, str, n);
 }
 
+char* strDirname(const char* path)
+{
+    const char *ptr = strrchr(path, '/');
+#ifdef _WIN32
+    if (ptr) ptr = strrchr(ptr + 1, '\\');
+#endif
+    int len = int(ptr + 1 - path);  // +1 to include '/'
+    return strDuplicate(path, len);
+}
+
 }
diff --git a/src/utils/tvgStr.h b/src/utils/tvgStr.h
index f3023a7e..448cc693 100644
--- a/src/utils/tvgStr.h
+++ b/src/utils/tvgStr.h
@@ -23,11 +23,15 @@
 #ifndef _TVG_STR_H_
 #define _TVG_STR_H_
 
+#include <cstddef>
+
 namespace tvg
 {
 
-float strToFloat(const char *nPtr, char **endPtr);
-char* strDuplicate(const char *str, size_t n);
+float strToFloat(const char *nPtr, char **endPtr);  //convert to float
+int str2int(const char* str, size_t n);             //convert to integer
+char* strDuplicate(const char *str, size_t n);      //copy the string
+char* strDirname(const char* path);                 //return the full directory name
 
 }
 #endif //_TVG_STR_H_