Add files via upload

src/packed.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2018 Yubico AB. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#ifndef _PACKED_H
+#define _PACKED_H
+
+#if defined(__GNUC__)
+#define PACKED_TYPE(type, def)	\
+	typedef def __attribute__ ((__packed__)) type;
+#elif defined(_MSC_VER)
+#define PACKED_TYPE(type, def)	\
+	__pragma(pack(push, 1))	\
+	typedef def type;	\
+	__pragma(pack(pop))
+#else
+#error "please provide a way to define packed types on your platform"
+#endif
+
+#endif /* !_PACKED_H */