+CompatPolicy compat_policy;
+
+static bool compat_policy_input_ok1(const char *adjective,
+ CompatPolicyInput policy,
+ ErrorClass error_class,
+ const char *kind, const char *name,
+ Error **errp)
+{
+ switch (policy) {
+ case COMPAT_POLICY_INPUT_ACCEPT:
+ return true;
+ case COMPAT_POLICY_INPUT_REJECT:
+ error_set(errp, error_class, "%s %s %s disabled by policy",
+ adjective, kind, name);
+ return false;
+ case COMPAT_POLICY_INPUT_CRASH:
+ default:
+ abort();
+ }
+}
+
+bool compat_policy_input_ok(unsigned special_features,
+ const CompatPolicy *policy,
+ ErrorClass error_class,
+ const char *kind, const char *name,
+ Error **errp)
+{
+ if ((special_features & 1u << QAPI_DEPRECATED)
+ && !compat_policy_input_ok1("Deprecated",
+ policy->deprecated_input,
+ error_class, kind, name, errp)) {
+ return false;
+ }
+ if ((special_features & (1u << QAPI_UNSTABLE))
+ && !compat_policy_input_ok1("Unstable",
+ policy->unstable_input,
+ error_class, kind, name, errp)) {
+ return false;
+ }
+ return true;
+}
+
+const char *qapi_enum_lookup(const QEnumLookup *lookup, int val)
+{
+ assert(val >= 0 && val < lookup->size);
+
+ return lookup->array[val];
+}
+
+int qapi_enum_parse(const QEnumLookup *lookup, const char *buf,
+ int def, Error **errp)