1 files changed, 47 insertions, 3 deletions

diff --git a/src/nvim/eval/typval.c b/src/nvim/eval/typval.c
index c339a5cdd2..4bc3a85efb 100644
--- a/src/nvim/eval/typval.c
+++ b/src/nvim/eval/typval.c
@@ -374,7 +374,7 @@ void tv_list_append_dict(list_T *const list, dict_T *const dict)
 ///                  case string is considered to be usual zero-terminated
 ///                  string or NULL “empty” string.
 void tv_list_append_string(list_T *const l, const char *const str,
-                           const ptrdiff_t len)
+                           const ssize_t len)
   FUNC_ATTR_NONNULL_ARG(1)
 {
   if (str == NULL) {
@@ -824,7 +824,7 @@ void tv_dict_watcher_add(dict_T *const dict, const char *const key_pattern,
 /// @param[in]  cb2  Second callback to check.
 ///
 /// @return True if they are equal, false otherwise.
-bool tv_callback_equal(const Callback *const cb1, const Callback *const cb2)
+bool tv_callback_equal(const Callback *cb1, const Callback *cb2)
   FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT
 {
   if (cb1->type != cb2->type) {
@@ -843,10 +843,31 @@ bool tv_callback_equal(const Callback *const cb1, const Callback *const cb2)
       return true;
     }
   }
-  assert(false);
+  abort();
   return false;
 }
 
+/// Unref/free callback
+void callback_free(Callback *callback)
+  FUNC_ATTR_NONNULL_ALL
+{
+  switch (callback->type) {
+    case kCallbackFuncref: {
+      func_unref(callback->data.funcref);
+      xfree(callback->data.funcref);
+      break;
+    }
+    case kCallbackPartial: {
+      partial_unref(callback->data.partial);
+      break;
+    }
+    case kCallbackNone: {
+      break;
+    }
+  }
+  callback->type = kCallbackNone;
+}
+
 /// Remove watcher from a dictionary
 ///
 /// @param  dict  Dictionary to remove watcher from.
@@ -1374,6 +1395,29 @@ int tv_dict_add_nr(dict_T *const d, const char *const key,
   return OK;
 }
 
+/// Add a special entry to dictionary
+///
+/// @param[out]  d  Dictionary to add entry to.
+/// @param[in]  key  Key to add.
+/// @param[in]  key_len  Key length.
+/// @param[in]  val SpecialVarValue to add.
+///
+/// @return OK in case of success, FAIL when key already exists.
+int tv_dict_add_special(dict_T *const d, const char *const key,
+                        const size_t key_len, SpecialVarValue val)
+{
+  dictitem_T *const item = tv_dict_item_alloc_len(key, key_len);
+
+  item->di_tv.v_lock = VAR_UNLOCKED;
+  item->di_tv.v_type = VAR_SPECIAL;
+  item->di_tv.vval.v_special = val;
+  if (tv_dict_add(d, item) == FAIL) {
+    tv_dict_item_free(item);
+    return FAIL;
+  }
+  return OK;
+}
+
 /// Add a string entry to dictionary
 ///
 /// @param[out]  d  Dictionary to add entry to.