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diff --git a/ingen/Status.hpp b/ingen/Status.hpp
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+/*
+  This file is part of Ingen.
+  Copyright 2007-2015 David Robillard <http://drobilla.net/>
+
+  Ingen is free software: you can redistribute it and/or modify it under the
+  terms of the GNU Affero General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or any later version.
+
+  Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU Affero General Public License for details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef INGEN_STATUS_HPP
+#define INGEN_STATUS_HPP
+
+namespace ingen {
+
+enum class Status {
+	SUCCESS,
+	FAILURE,
+
+	BAD_INDEX,
+	BAD_OBJECT_TYPE,
+	BAD_REQUEST,
+	BAD_URI,
+	BAD_VALUE_TYPE,
+	BAD_VALUE,
+	CLIENT_NOT_FOUND,
+	CREATION_FAILED,
+	DIRECTION_MISMATCH,
+	EXISTS,
+	INTERNAL_ERROR,
+	INVALID_PARENT,
+	INVALID_POLY,
+	NOT_DELETABLE,
+	NOT_FOUND,
+	NOT_MOVABLE,
+	NOT_PREPARED,
+	NO_SPACE,
+	PARENT_DIFFERS,
+	PARENT_NOT_FOUND,
+	PROTOTYPE_NOT_FOUND,
+	PORT_NOT_FOUND,
+	TYPE_MISMATCH,
+	UNKNOWN_TYPE,
+	COMPILATION_FAILED
+};
+
+static inline const char*
+ingen_status_string(Status st)
+{
+	switch (st) {
+	case Status::SUCCESS:             return "Success";
+	case Status::FAILURE:             return "Failure";
+
+	case Status::BAD_INDEX:           return "Invalid index";
+	case Status::BAD_OBJECT_TYPE:     return "Invalid object type";
+	case Status::BAD_REQUEST:         return "Invalid request";
+	case Status::BAD_URI:             return "Invalid URI";
+	case Status::BAD_VALUE_TYPE:      return "Invalid value type";
+	case Status::BAD_VALUE:           return "Invalid value";
+	case Status::CLIENT_NOT_FOUND:    return "Client not found";
+	case Status::CREATION_FAILED:     return "Creation failed";
+	case Status::DIRECTION_MISMATCH:  return "Direction mismatch";
+	case Status::EXISTS:              return "Object exists";
+	case Status::INTERNAL_ERROR:      return "Internal error";
+	case Status::INVALID_PARENT:      return "Invalid parent";
+	case Status::INVALID_POLY:        return "Invalid polyphony";
+	case Status::NOT_DELETABLE:       return "Object not deletable";
+	case Status::NOT_FOUND:           return "Object not found";
+	case Status::NOT_MOVABLE:         return "Object not movable";
+	case Status::NOT_PREPARED:        return "Not prepared";
+	case Status::NO_SPACE:            return "Insufficient space";
+	case Status::PARENT_DIFFERS:      return "Parent differs";
+	case Status::PARENT_NOT_FOUND:    return "Parent not found";
+	case Status::PROTOTYPE_NOT_FOUND: return "Prototype not found";
+	case Status::PORT_NOT_FOUND:      return "Port not found";
+	case Status::TYPE_MISMATCH:       return "Type mismatch";
+	case Status::UNKNOWN_TYPE:        return "Unknown type";
+	case Status::COMPILATION_FAILED:  return "Graph compilation failed";
+	}
+
+	return "Unknown error";
+}
+
+} // namespace ingen
+
+#endif // INGEN_STATUS_HPP