added path_getUserDir, dir_createParent

src/filesystem/dir.c

@@ -1,6 +1,9 @@
 #include "internal.h"
 
 bool dir_exists(cstr path){
+    if(path == NULL || path[0] == 0)
+        return true;
+
     if(path[0]=='.'){
         if(path[1]==0 || (path[1]==path_sep && path[1]==0)) 
             return true; // dir . or ./ always exists
@@ -23,13 +26,12 @@ bool dir_exists(cstr path){
 
 Result(bool) dir_create(cstr path){
     Deferral(4);
-    if (dir_exists(path)){
+
+    if (path == NULL || path[0] == 0 || dir_exists(path)){
         Return RESULT_VALUE(i, false);
     }
     
-    char* parentDir= str_copy(path_dirname(str_from_cstr((void*)path))).data;
-    Defer(free(parentDir));
-    try_void(dir_create(parentDir));
+    try_void(dir_createParent(path));
 
 #if TLIBC_FS_USE_WINDOWS_H
     if(!CreateDirectory(path, NULL))
@@ -47,3 +49,18 @@ Result(bool) dir_create(cstr path){
 
     Return RESULT_VALUE(i, true);
 }
+
+Result(bool) dir_createParent(cstr path){
+    Deferral(4);
+    
+    str parent_dir_str = path_dirname(str_from_cstr((void*)path));
+    if(parent_dir_str.len == 0){
+        Return RESULT_VALUE(i, false);
+    }
+    
+    char* parent_dir_cstr = str_copy(parent_dir_str).data;
+    Defer(free(parent_dir_cstr));
+    
+    try(bool result, i, dir_create(parent_dir_cstr));
+    Return RESULT_VALUE(i, result);
+}