mirror of
https://github.com/Bareflank/hypervisor
synced 2026-08-17 06:23:04 -04:00
d88b6c370b
This patch cleans up the headers of each file, and removes the authors fields as they are not needed and are confusing. Signed-off-by: rianquinn <“rianquinn@gmail.com”>
145 lines
3.2 KiB
C++
145 lines
3.2 KiB
C++
//
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// Bareflank Hypervisor
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// Copyright (C) 2015 Assured Information Security, Inc.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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///
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/// @file bfupperlower.h
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///
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#ifndef BFUPPERLOWER_H
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#define BFUPPERLOWER_H
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#include <bftypes.h>
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namespace bfn
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{
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/// Lower
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///
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/// @param val the pointer to mask
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/// @return the lower 12 bits of val
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///
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template <
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typename T,
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typename = std::enable_if_t<std::is_integral<T>::value>
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>
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auto
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lower(T val) noexcept
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{
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return static_cast<T>(static_cast<uintptr_t>(val) & (0xFFFULL));
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}
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/// Lower
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///
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/// @param val the pointer to mask
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/// @return the lower 12 bits of val
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///
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template<class T>
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auto
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lower(T *val) noexcept
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{
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return reinterpret_cast<T *>(reinterpret_cast<uintptr_t>(val) & (0xFFFULL));
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}
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/// Lower
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///
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/// @param val the pointer to mask
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/// @param from the number of bits to mask
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/// @return the lower "from" bits of val
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///
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template <
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typename T,
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typename = std::enable_if_t<std::is_integral<T>::value>
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>
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auto
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lower(T val, uintptr_t from) noexcept
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{
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return static_cast<T>(static_cast<uintptr_t>(val) & ((0x1ULL << from) - 1));
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}
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/// Lower
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///
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/// @param val the pointer to mask
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/// @param from the number of bits to mask
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/// @return the lower "from" bits of val
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///
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template<class T>
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auto
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lower(T *val, uintptr_t from) noexcept
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{
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return reinterpret_cast<T *>(reinterpret_cast<uintptr_t>(val) & ((0x1ULL << from) - 1));
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}
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/// Upper
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///
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/// @param val the pointer to mask
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/// @return the upper 12 bits of val
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///
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template <
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typename T,
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typename = std::enable_if_t<std::is_integral<T>::value>
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>
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auto
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upper(T val) noexcept
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{
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return static_cast<T>(static_cast<uintptr_t>(val) & ~(0xFFFULL));
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}
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/// Upper
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///
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/// @param val the pointer to mask
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/// @return the upper 12 bits of val
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///
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template<class T>
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auto
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upper(T *val) noexcept
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{
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return reinterpret_cast<T *>(reinterpret_cast<uintptr_t>(val) & ~(0xFFFULL));
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}
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/// Upper
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///
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/// @param val the pointer to mask
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/// @param from the number of bits to mask
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/// @return the upper "from" bits of val
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///
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template <
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typename T,
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typename = std::enable_if_t<std::is_integral<T>::value>
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>
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auto
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upper(T val, uintptr_t from) noexcept
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{
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return static_cast<T>(static_cast<uintptr_t>(val) & ~((0x1ULL << from) - 1));
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}
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/// Upper
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///
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/// @param val the pointer to mask
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/// @param from the number of bits to mask
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/// @return the upper "from" bits of val
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///
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template<class T>
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auto
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upper(T *val, uintptr_t from) noexcept
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{
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return reinterpret_cast<T *>(reinterpret_cast<uintptr_t>(val) & ~((0x1ULL << from) - 1));
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}
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}
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#endif
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