enum: Add functions to add and remove mappings from enum names

Co-authored-by: Thomas Egerer <[email protected]>

src/libstrongswan/utils/enum.c

@@ -1,4 +1,5 @@
 /*
+ * Copyright (C) 2023 Tobias Brunner
  * Copyright (C) 2006 Martin Willi
  *
  * Copyright (C) secunet Security Networks AG
@@ -23,6 +24,49 @@
 
 #include "enum.h"
 
+/*
+ * Described in header
+ */
+void enum_add_enum_names(enum_name_t *e, enum_name_t *names)
+{
+	if (e)
+	{
+		do
+		{
+			if (!e->next)
+			{
+				e->next = names;
+				break;
+			}
+			else if (e->next == names)
+			{
+				break;
+			}
+		}
+		while ((e = e->next));
+	}
+}
+
+/*
+ * Described in header
+ */
+void enum_remove_enum_names(enum_name_t *e, enum_name_t *names)
+{
+	if (e)
+	{
+		do
+		{
+			if (e->next == names)
+			{
+				e->next = names->next;
+				names->next = NULL;
+				break;
+			}
+		}
+		while ((e = e->next));
+	}
+}
+
 /**
  * See header.
  */