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/* $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) 2006-2022 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 */
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