diff --git a/src/Filesystem/path.c b/src/Filesystem/path.c
index 6b52991..0a8757b 100644
--- a/src/Filesystem/path.c
+++ b/src/Filesystem/path.c
@@ -1,13 +1,13 @@
 #include "filesystem.h"
 
-char* __path_concat(uint16 n, char* prev_part, ...){
+char* __path_concat(uint16 n, ...){
     char** parts=(char**)malloc(n*sizeof(char*));
     uint32* lengths=malloc(n*sizeof(uint32));
     uint32 totalLength=0;
 
     // reading args from va_list
     va_list vl;
-    va_start(vl, prev_part);
+    va_start(vl, n);
     for(uint16 i=0; i<n; i++){
         char* part=va_arg(vl,char*);
         int16 length=cptr_length(part);
@@ -38,5 +38,18 @@ char* __path_concat(uint16 n, char* prev_part, ...){
 }
 
 char* path_fixSeparators(char* path){
-    
-}
\ No newline at end of file
+    char* pathCopy=cptr_copy(path);
+    char c;
+    while((c=*pathCopy)){
+        if(c==path_notSep)
+            *pathCopy=path_sep;
+        pathCopy++;
+    }
+    return pathCopy;
+}
+
+Maybe path_throwIfEscapes(char* path){
+    if(cptr_contains(path,".."))
+        safethrow(cptr_concat("path <",path,"> uses <..>, that's not allowed"),);
+    return MaybeNull;
+}
diff --git a/src/Filesystem/path.h b/src/Filesystem/path.h
index 1b9ec52..7c3b049 100644
--- a/src/Filesystem/path.h
+++ b/src/Filesystem/path.h
@@ -8,12 +8,28 @@ extern "C" {
 
 #if defined(_WIN32) || defined (_WIN64)
 static const char path_sep='\\';
+static const char path_notSep='/';
 #else
 static const char path_sep='/';
+static const char path_notSep='\\';
 #endif
 
-char* __path_concat(uint16 n, char* path_start, ...);
-#define path_concat(PATH_PARTS) __path_concat(count_args(PATH_PARTS), PATH_PARTS)
+char* __path_concat(uint16 n, ...);
+/// @brief merges path parts together and places <path_sep> between them
+/// @return new cstr
+#define path_concat(PATH_PARTS...) __path_concat(count_args(PATH_PARTS), PATH_PARTS)
+
+/// @brief fixes path separators
+/// @param cstr where can be <path_notSep>
+/// @return new cstr with correct separators 
+char* path_fixSeparators(char* path);
+
+#define path_resolve(PATH_PARTS...) path_fixSeparators(path_concat(PATH_PARTS))
+
+/// @brief calls safethrow() if finds escape sequense in path
+/// @param path cstr where can be <..>
+/// @return Maybe<void>
+Maybe path_throwIfEscapes(char* path);
 
 #if __cplusplus
 }