diff --git a/gen/extract.py b/gen/extract.py
index b141994..a57c730 100755
--- a/gen/extract.py
+++ b/gen/extract.py
@@ -3,9 +3,9 @@
 import os
 import json
 
-
 from ast_parser import AST_Parser
 
+
 def create_paths_list(dirname, filenames):
     paths = []
     for basename in filenames:
@@ -30,10 +30,10 @@ def read_file(path):
     return item
 
 
-def write_json(header):
-    header["outpath"] += ".json"
+def write_json(header, key):
+    header["outpath"] += "." + key + ".json"
     with open(header.get("outpath"), "w+") as f:
-        json.dump(header, f, indent=4)
+        json.dump(header[key], f, indent=4)
 
 
 def prepare_header(header, out_dir):
@@ -43,6 +43,49 @@ def prepare_header(header, out_dir):
     return header
 
 
+def create_simple_AST(ast):
+    elems = {"functions": "",
+             "structs": "",
+             "enums": ""}
+    elems["functions"] = extract_functions_from_ast(ast)
+    return elems
+
+
+# extracts top level functions only (is there anything else in C?)
+def extract_functions_from_ast(ast):
+    functions = []
+    children = ast["children"]
+    for child in children:
+        if child["kind"] == "CursorKind.FUNCTION_DECL":
+            functions.append(simple_AST_functions(child))
+    return functions
+
+
+def simple_AST_functions(func_AST):
+    simple_func = {"name": "",
+                   "return_type": "",
+                   "arguments": []}
+
+    simple_func["name"] = func_AST["name"]
+    simple_func["return_type"] = func_AST["result_type"]
+    arguments = []
+    # check if func has args
+    if "children" in func_AST:
+        for arg_AST in func_AST["children"]:
+            arg_simple = None
+            if arg_AST["kind"] == "CursorKind.PARM_DECL":
+                arg_simple = {"name": "",
+                              "type": ""}
+                arg_simple["name"] = arg_AST["name"]
+                arg_simple["type"] = arg_AST["type"]
+            if arg_simple:
+                arguments.append(arg_simple)
+
+    if arguments:
+        simple_func["arguments"] = arguments
+    return simple_func
+
+
 def main():
     input()
     parser = AST_Parser("/opt/local/libexec/llvm-9.0/lib/libclang.dylib")
@@ -63,7 +106,10 @@ def main():
         header = prepare_header(header, out_dir)
         print("processing path: " + header.get("path") + "...")
         header["AST"] = parser.parse(header["path"], header["sourcecode"])
-        write_json(header)
+        write_json(header, "AST")
+
+        header["simple_AST"] = create_simple_AST(header["AST"])
+        write_json(header, "simple_AST")
 
 
 if __name__ == "__main__":