78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
// Copyright 2021 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "Core/CheatGeneration.h"
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#include <vector>
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#include <fmt/format.h>
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#include "Common/Align.h"
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#include "Common/CommonTypes.h"
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#include "Common/Result.h"
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#include "Common/Swap.h"
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#include "Core/ActionReplay.h"
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#include "Core/CheatSearch.h"
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constexpr int AR_SET_BYTE_CMD = 0x00;
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constexpr int AR_SET_SHORT_CMD = 0x02;
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constexpr int AR_SET_INT_CMD = 0x04;
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static std::vector<ActionReplay::AREntry> ResultToAREntries(u32 addr, const Cheats::SearchValue& sv)
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{
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std::vector<ActionReplay::AREntry> codes;
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std::vector<u8> data = Cheats::GetValueAsByteVector(sv);
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for (size_t i = 0; i < data.size(); ++i)
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{
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const u32 address = (addr + i) & 0x01ff'ffffu;
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if (Common::AlignUp(address, 4) == address && i + 3 < data.size())
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{
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const u8 cmd = AR_SET_INT_CMD;
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const u32 val = Common::swap32(&data[i]);
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codes.emplace_back((cmd << 24) | address, val);
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i += 3;
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}
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else if (Common::AlignUp(address, 2) == address && i + 1 < data.size())
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{
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const u8 cmd = AR_SET_SHORT_CMD;
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const u32 val = Common::swap16(&data[i]);
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codes.emplace_back((cmd << 24) | address, val);
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++i;
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}
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else
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{
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const u8 cmd = AR_SET_BYTE_CMD;
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const u32 val = data[i];
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codes.emplace_back((cmd << 24) | address, val);
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}
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}
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return codes;
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}
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Common::Result<Cheats::GenerateActionReplayCodeErrorCode, ActionReplay::ARCode>
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Cheats::GenerateActionReplayCode(const Cheats::CheatSearchSessionBase& session, size_t index)
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{
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if (index >= session.GetResultCount())
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return Cheats::GenerateActionReplayCodeErrorCode::IndexOutOfRange;
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if (session.GetResultValueState(index) != Cheats::SearchResultValueState::ValueFromVirtualMemory)
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return Cheats::GenerateActionReplayCodeErrorCode::NotVirtualMemory;
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u32 address = session.GetResultAddress(index);
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// check if the address is actually addressable by the ActionReplay system
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if (((address & 0x01ff'ffffu) | 0x8000'0000u) != address)
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return Cheats::GenerateActionReplayCodeErrorCode::InvalidAddress;
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ActionReplay::ARCode ar_code;
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ar_code.enabled = true;
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ar_code.user_defined = true;
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ar_code.name = fmt::format("Generated by Cheat Search (Address 0x{:08x})", address);
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ar_code.ops = ResultToAREntries(address, session.GetResultValueAsSearchValue(index));
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return ar_code;
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}
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