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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/service/mii/mii_util.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/core/hle/service/mii/mii_util.h b/src/core/hle/service/mii/mii_util.h new file mode 100644 index 000000000..3534fa31d --- /dev/null +++ b/src/core/hle/service/mii/mii_util.h @@ -0,0 +1,85 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include <random> +#include <span> + +#include "common/common_types.h" +#include "common/swap.h" +#include "common/uuid.h" +#include "core/hle/service/mii/mii_types.h" + +namespace Service::Mii { +class MiiUtil { +public: + static u16 CalculateCrc16(const void* data, std::size_t size) { + s32 crc{}; + for (std::size_t i = 0; i < size; i++) { + crc ^= static_cast<const u8*>(data)[i] << 8; + for (std::size_t j = 0; j < 8; j++) { + crc <<= 1; + if ((crc & 0x10000) != 0) { + crc = (crc ^ 0x1021) & 0xFFFF; + } + } + } + return Common::swap16(static_cast<u16>(crc)); + } + + static u16 CalculateDeviceCrc16(const Common::UUID& uuid, std::size_t data_size) { + constexpr u16 magic{0x1021}; + s32 crc{}; + + for (std::size_t i = 0; i < uuid.uuid.size(); i++) { + for (std::size_t j = 0; j < 8; j++) { + crc <<= 1; + if ((crc & 0x10000) != 0) { + crc = crc ^ magic; + } + } + crc ^= uuid.uuid[i]; + } + + // As much as this looks wrong this is what N's does + + for (std::size_t i = 0; i < data_size * 8; i++) { + crc <<= 1; + if ((crc & 0x10000) != 0) { + crc = crc ^ magic; + } + } + + return Common::swap16(static_cast<u16>(crc)); + } + + static Common::UUID MakeCreateId() { + return Common::UUID::MakeRandomRFC4122V4(); + } + + static Common::UUID GetDeviceId() { + // This should be nn::settings::detail::GetMiiAuthorId() + return Common::UUID::MakeDefault(); + } + + template <typename T> + static T GetRandomValue(T min, T max) { + std::random_device device; + std::mt19937 gen(device()); + std::uniform_int_distribution<u64> distribution(static_cast<u64>(min), + static_cast<u64>(max)); + return static_cast<T>(distribution(gen)); + } + + template <typename T> + static T GetRandomValue(T max) { + return GetRandomValue<T>({}, max); + } + + static bool IsFontRegionValid(FontRegion font, std::span<const char16_t> text) { + // TODO: This function needs to check against the font tables + return true; + } +}; +} // namespace Service::Mii |