1 files changed, 64 insertions, 0 deletions
diff --git a/src/VBox/Devices/Storage/swab.h b/src/VBox/Devices/Storage/swab.h
new file mode 100644
index 00000000..3c42fb12
--- /dev/null
+++ b/src/VBox/Devices/Storage/swab.h
@@ -0,0 +1,64 @@
+/* $Id: swab.h $ */
+/** @file
+ *
+ * VBox storage devices:
+ * C++-safe replacements for some Linux byte order macros
+ *
+ * On Linux, DrvHostDVD.cpp includes <linux/cdrom.h>, which in turn
+ * includes <linux/byteorder/swab.h>.  Unfortunately, that file is not very
+ * C++ friendly, and our C++ compiler refuses to look at it.  The solution
+ * is to define _LINUX_BYTEORDER_SWAB_H, which prevents that file's contents
+ * from getting included at all, and to provide, in this file, our own
+ * C++-proof versions of the macros which are needed by <linux/cdrom.h>
+ * before we include that file.  We actually provide them as inline
+ * functions, due to the way they get resolved in the original.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+#ifndef VBOX_INCLUDED_SRC_Storage_swab_h
+#define VBOX_INCLUDED_SRC_Storage_swab_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#define _LINUX_BYTEORDER_SWAB_H
+#define _LINUX_BYTEORDER_SWABB_H
+
+#include <asm/types.h>
+
+/* Sorry for the unnecessary brackets here, but I really think
+   readability requires them */
+static __inline__ __u16 __swab16p(const __u16 *px)
+{
+    __u16 x = *px;
+    return ((x & 0xff) << 8) | ((x >> 8) & 0xff);
+}
+
+static __inline__ __u32 __swab32p(const __u32 *px)
+{
+    __u32 x = *px;
+    return ((x & 0xff) << 24) | ((x & 0xff00) << 8)
+           | ((x >> 8) & 0xff00) | ((x >> 24) & 0xff);
+}
+
+static __inline__ __u64 __swab64p(const __u64 *px)
+{
+    __u64 x = *px;
+    return ((x & 0xff) << 56) | ((x & 0xff00) << 40)
+           | ((x & 0xff0000) << 24) | ((x & 0xff000000) << 8)
+           | ((x >> 8) & 0xff000000) | ((x >> 24) & 0xff0000)
+           | ((x >> 40) & 0xff00) | ((x >> 56) & 0xff);
+}
+
+#endif /* !VBOX_INCLUDED_SRC_Storage_swab_h */