1 files changed, 74 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..a63713e8
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+++ b/src/VBox/Devices/Storage/swab.h
@@ -0,0 +1,74 @@
+/* $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) 2006-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#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 */