A tool for deriving PKG packet encryption keys for ps4 written in c++
| 1 | // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project |
| 2 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 3 | |
| 4 | #pragma once |
| 5 | |
| 6 | #include <cstddef> |
| 7 | #include <type_traits> |
| 8 | |
| 9 | namespace Common { |
| 10 | |
| 11 | /// Ceiled integer division. |
| 12 | template <typename N, typename D> |
| 13 | requires std::is_integral_v<N> && std::is_unsigned_v<D> |
| 14 | [[nodiscard]] constexpr N DivCeil(N number, D divisor) { |
| 15 | return static_cast<N>((static_cast<D>(number) + divisor - 1) / divisor); |
| 16 | } |
| 17 | |
| 18 | /// Ceiled integer division with logarithmic divisor in base 2 |
| 19 | template <typename N, typename D> |
| 20 | requires std::is_integral_v<N> && std::is_unsigned_v<D> |
| 21 | [[nodiscard]] constexpr N DivCeilLog2(N value, D alignment_log2) { |
| 22 | return static_cast<N>((static_cast<D>(value) + (D(1) << alignment_log2) - 1) >> alignment_log2); |
| 23 | } |
| 24 | |
| 25 | } // namespace Common |
| 26 |