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/*
Copyright 2016-2023 melonDS team
This file is part of melonDS.
melonDS 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, either version 3 of the License, or (at your option)
any later version.
melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
*/
#ifndef MELONDS_UTILS_H
#define MELONDS_UTILS_H
#include <memory>
#include "types.h"
#include <utility>
namespace melonDS
{
/// Ensures that the given array is a power of 2 in length.
///
/// @return If \c len is a power of 2, returns \c data and \c len unchanged
/// without copying anything.
/// If \c data is \c nullptr, returns <tt>{nullptr, 0}</tt>.
/// Otherwise, return a copy of \c data with zero-padding to the next power of 2.
/// @post \c data is \c nullptr, even if it doesn't need to be copied.
std::pair<std::unique_ptr<u8[]>, u32> PadToPowerOf2(std::unique_ptr<u8[]>&& data, u32 len) noexcept;
std::pair<std::unique_ptr<u8[]>, u32> PadToPowerOf2(const u8* data, u32 len) noexcept;
std::unique_ptr<u8[]> CopyToUnique(const u8* data, u32 len) noexcept;
}
#endif // MELONDS_UTILS_H
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