PoC: replace hash tables by arrays

This basically implements the functionality and the testbench
passes. We still need more tests and expect regressions.

see also rsyslog#35

json_object.c

@@ -466,32 +466,6 @@ void fjson_object_object_add_ex(struct fjson_object* jso,
 done:
 	return;
 }
-#if 0
-void fjson_object_object_add_ex(struct fjson_object* jso,
-	const char *const key,
-	struct fjson_object *const val,
-	const unsigned opts)
-{
-	// We lookup the entry and replace the value, rather than just deleting
-	// and re-adding it, so the existing key remains valid.
-	fjson_object *existing_value = NULL;
-	struct lh_entry *existing_entry;
-	const unsigned long hash = lh_get_hash(jso->o.c_object, (void*)key);
-	existing_entry = (opts & FJSON_OBJECT_ADD_KEY_IS_NEW) ? NULL : 
-			      lh_table_lookup_entry_w_hash(jso->o.c_object, (void*)key, hash);
-	if (!existing_entry)
-	{
-		void *const k = (opts & FJSON_OBJECT_KEY_IS_CONSTANT) ?
-					(void*)key : strdup(key);
-		lh_table_insert_w_hash(jso->o.c_object, k, val, hash, opts);
-		return;
-	}
-	existing_value = (fjson_object *)existing_entry->v;
-	if (existing_value)
-		fjson_object_put(existing_value);
-	existing_entry->v = val;
-}
-#endif
 
 void fjson_object_object_add(struct fjson_object *const __restrict__ jso,
 	const char *const key,
@@ -526,27 +500,6 @@ void fjson_object_object_add(struct fjson_object *const __restrict__ jso,
 done:
 	return;
 }
-#if 0
-void fjson_object_object_add(struct fjson_object* jso, const char *key,
-			    struct fjson_object *val)
-{
-	// We lookup the entry and replace the value, rather than just deleting
-	// and re-adding it, so the existing key remains valid.
-	fjson_object *existing_value = NULL;
-	struct lh_entry *existing_entry;
-	const unsigned long hash = lh_get_hash(jso->o.c_object, (void*)key);
-	existing_entry = lh_table_lookup_entry_w_hash(jso->o.c_object, (void*)key, hash);
-	if (!existing_entry)
-	{
-		lh_table_insert_w_hash(jso->o.c_object, strdup(key), val, hash, 0);
-		return;
-	}
-	existing_value = (fjson_object  *)existing_entry->v;
-	if (existing_value)
-		fjson_object_put(existing_value);
-	existing_entry->v = val;
-}
-#endif
 
 
 int fjson_object_object_length(struct fjson_object *jso)

json_object_private.h

@@ -49,7 +49,6 @@ struct fjson_object
 		fjson_bool c_boolean;
 		double c_double;
 		int64_t c_int64;
-		struct lh_table *c_object;
 		struct {
 			int nelem;
 			struct _fjson_child_pg pg;