Atmosphere/libraries/libstratosphere/include/stratosphere/fssystem/fssystem_bitmap_utils.hpp

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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours.hpp>
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namespace ams::fssystem {
constexpr inline s32 CountLeadingZeros(u32 val) {
return util::CountLeadingZeros(val);
}
constexpr inline s32 CountLeadingOnes(u32 val) {
return CountLeadingZeros(~val);
}
inline u32 ReadU32(const u8 *buf, size_t index) {
u32 val;
std::memcpy(std::addressof(val), buf + index, sizeof(u32));
return val;
}
inline void WriteU32(u8 *buf, size_t index, u32 val) {
std::memcpy(buf + index, std::addressof(val), sizeof(u32));
}
constexpr inline bool IsPowerOfTwo(s32 val) {
return util::IsPowerOfTwo(val);
}
constexpr inline u32 ILog2(u32 val) {
AMS_ASSERT(val > 0);
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return (BITSIZEOF(u32) - 1 - util::CountLeadingZeros<u32>(val));
}
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constexpr inline u32 CeilingPowerOfTwo(u32 val) {
if (val == 0) {
return 1;
}
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return util::CeilingPowerOfTwo<u32>(val);
}
}