diff --git a/src/json_test.c b/src/json_test.c
index f50c956..2a28c74 100644
--- a/src/json_test.c
+++ b/src/json_test.c
@@ -35,107 +35,107 @@
 
     /* string and incomplete string */
     reader.js_buf = (char_u *)"\"hello\"";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  \"hello\" ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"\"hello";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     /* number and dash (incomplete number) */
     reader.js_buf = (char_u *)"123";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"-";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     /* false, true and null, also incomplete */
     reader.js_buf = (char_u *)"false";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"f";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"fa";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"fal";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"fals";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     reader.js_buf = (char_u *)"true";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"t";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"tr";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"tru";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     reader.js_buf = (char_u *)"null";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"n";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"nu";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"nul";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     /* object without white space */
     reader.js_buf = (char_u *)"{\"a\":123}";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"{\"a\":123";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"{\"a\":";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"{\"a\"";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"{\"a";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"{\"";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"{";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     /* object with white space */
     reader.js_buf = (char_u *)"  {  \"a\"  :  123  }  ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  {  \"a\"  :  123  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  {  \"a\"  :  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  {  \"a\"  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  {  \"a  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  {   ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     /* array without white space */
     reader.js_buf = (char_u *)"[\"a\",123]";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"[\"a\",123";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"[\"a\",";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"[\"a\"";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"[\"a";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"[\"";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"[";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 
     /* array with white space */
     reader.js_buf = (char_u *)"  [  \"a\"  ,  123  ]  ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  [  \"a\"  ,  123  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  [  \"a\"  ,  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  [  \"a\"  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  [  \"a  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
     reader.js_buf = (char_u *)"  [  ";
-    assert(json_find_end(&reader) == MAYBE);
+    assert(json_find_end(&reader, 0) == MAYBE);
 }
 
     static int
@@ -157,15 +157,15 @@
     reader.js_used = 0;
     reader.js_buf = (char_u *)"  [  \"a\"  ,  123  ";
     reader.js_cookie =        "  [  \"a\"  ,  123  ]  ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  [  \"a\"  ,  ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  [  \"a\"  ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  [  \"a";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
     reader.js_buf = (char_u *)"  [  ";
-    assert(json_find_end(&reader) == OK);
+    assert(json_find_end(&reader, 0) == OK);
 }
 
 /*