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27 lines
770 B
C++
27 lines
770 B
C++
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "core/file_sys/fssystem/fssystem_utility.h"
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namespace FileSys {
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void AddCounter(void* counter_, size_t counter_size, u64 value) {
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u8* counter = static_cast<u8*>(counter_);
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u64 remaining = value;
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u8 carry = 0;
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for (size_t i = 0; i < counter_size; i++) {
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auto sum = counter[counter_size - 1 - i] + (remaining & 0xFF) + carry;
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carry = static_cast<u8>(sum >> (sizeof(u8) * 8));
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auto sum8 = static_cast<u8>(sum & 0xFF);
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counter[counter_size - 1 - i] = sum8;
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remaining >>= (sizeof(u8) * 8);
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if (carry == 0 && remaining == 0) {
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break;
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}
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}
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}
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} // namespace FileSys
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