Get MetalClaw read/write test passing

src/ox/mc/presencemask.hpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2015 - 2017 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <ox/std/types.hpp>
+
+namespace ox {
+
+class FieldPresenseMask {
+	private:
+		uint8_t *m_mask;
+		int m_maxLen = 0;
+
+	public:
+		FieldPresenseMask(uint8_t *mask, size_t maxLen);
+
+		bool get(int i);
+
+		int set(int i, bool on);
+
+		void setMaxLen(int);
+};
+
+}