mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-20 07:08:59 +00:00
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
/*
|
|
* 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>
|
|
|
|
namespace ams::fssystem {
|
|
|
|
/* ACCURATE_TO_VERSION: 13.4.0.0 */
|
|
|
|
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);
|
|
return (BITSIZEOF(u32) - 1 - util::CountLeadingZeros<u32>(val));
|
|
}
|
|
|
|
constexpr inline u32 CeilingPowerOfTwo(u32 val) {
|
|
if (val == 0) {
|
|
return 1;
|
|
}
|
|
|
|
return util::CeilingPowerOfTwo<u32>(val);
|
|
}
|
|
|
|
}
|