mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-15 16:48:01 +00:00
338 lines
12 KiB
C#
338 lines
12 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace PKHeX.Core
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{
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/// <summary>
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/// Generation 4 <see cref="SaveFile"/> object for Pokémon Battle Revolution saves.
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/// </summary>
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public sealed class SAV4BR : SaveFile
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{
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protected internal override string ShortSummary => $"{Version} #{SaveCount:0000}";
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public override string Extension => string.Empty;
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public override PersonalTable Personal => PersonalTable.DP;
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public override IReadOnlyList<ushort> HeldItems => Legal.HeldItems_DP;
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private const int SAVE_COUNT = 4;
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public SAV4BR() : base(SaveUtil.SIZE_G4BR)
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{
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ClearBoxes();
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}
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public SAV4BR(byte[] data) : base(data)
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{
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InitializeData(data);
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}
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private void InitializeData(byte[] data)
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{
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Data = DecryptPBRSaveData(data);
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// Detect active save
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var first = BigEndian.ToUInt32(Data, 0x00004C);
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var second = BigEndian.ToUInt32(Data, 0x1C004C);
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SaveCount = Math.Max(second, first);
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if (second > first)
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{
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// swap halves
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byte[] tempData = new byte[0x1C0000];
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Array.Copy(Data, 0, tempData, 0, 0x1C0000);
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Array.Copy(Data, 0x1C0000, Data, 0, 0x1C0000);
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tempData.CopyTo(Data, 0x1C0000);
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}
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var names = (string[]) SaveNames;
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for (int i = 0; i < SAVE_COUNT; i++)
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{
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var name = GetOTName(i);
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if (string.IsNullOrWhiteSpace(name))
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name = $"Empty {i + 1}";
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else if (_currentSlot == -1)
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_currentSlot = i;
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names[i] = name;
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}
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if (_currentSlot == -1)
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_currentSlot = 0;
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CurrentSlot = _currentSlot;
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}
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/// <summary> Amount of times the primary save has been saved </summary>
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private uint SaveCount;
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protected override byte[] GetFinalData()
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{
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SetChecksums();
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return EncryptPBRSaveData(Data);
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}
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// Configuration
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protected override SaveFile CloneInternal() => new SAV4BR(Write());
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public readonly IReadOnlyList<string> SaveNames = new string[SAVE_COUNT];
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private int _currentSlot = -1;
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private const int SIZE_SLOT = 0x6FF00;
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public int CurrentSlot
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{
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get => _currentSlot;
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// 4 save slots, data reading depends on current slot
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set
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{
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_currentSlot = value;
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var ofs = SIZE_SLOT * _currentSlot;
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Box = ofs + 0x978;
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Party = ofs + 0x13A54; // first team slot after boxes
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BoxName = ofs + 0x58674;
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}
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}
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protected override int SIZE_STORED => PokeCrypto.SIZE_4STORED;
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protected override int SIZE_PARTY => PokeCrypto.SIZE_4STORED + 4;
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public override PKM BlankPKM => new BK4();
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public override Type PKMType => typeof(BK4);
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public override int MaxMoveID => 467;
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public override int MaxSpeciesID => Legal.MaxSpeciesID_4;
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public override int MaxAbilityID => Legal.MaxAbilityID_4;
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public override int MaxItemID => Legal.MaxItemID_4_HGSS;
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public override int MaxBallID => Legal.MaxBallID_4;
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public override int MaxGameID => Legal.MaxGameID_4;
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public override int MaxEV => 255;
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public override int Generation => 4;
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protected override int GiftCountMax => 1;
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public override int OTLength => 7;
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public override int NickLength => 10;
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public override int MaxMoney => 999999;
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public override int Language => (int)LanguageID.English; // prevent KOR from inhabiting
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public override int BoxCount => 18;
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public override int PartyCount
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{
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get
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{
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int ctr = 0;
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for (int i = 0; i < 6; i++)
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{
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if (Data[GetPartyOffset(i) + 4] != 0) // sanity
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ctr++;
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}
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return ctr;
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}
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protected set
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{
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// Ignore, value is calculated
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}
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}
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// Checksums
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protected override void SetChecksums()
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{
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SetChecksum(Data, 0, 0x100, 8);
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SetChecksum(Data, 0, 0x1C0000, 0x1BFF80);
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SetChecksum(Data, 0x1C0000, 0x100, 0x1C0008);
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SetChecksum(Data, 0x1C0000, 0x1C0000, 0x1BFF80 + 0x1C0000);
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}
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public override bool ChecksumsValid => IsChecksumsValid(Data);
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public override string ChecksumInfo => $"Checksums valid: {ChecksumsValid}.";
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public static bool IsChecksumsValid(byte[] sav)
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{
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return VerifyChecksum(sav, 0x000000, 0x1C0000, 0x1BFF80)
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&& VerifyChecksum(sav, 0x000000, 0x000100, 0x000008)
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&& VerifyChecksum(sav, 0x1C0000, 0x1C0000, 0x1BFF80 + 0x1C0000)
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&& VerifyChecksum(sav, 0x1C0000, 0x000100, 0x1C0008);
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}
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// Trainer Info
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public override GameVersion Version { get => GameVersion.BATREV; protected set { } }
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private string GetOTName(int slot)
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{
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var ofs = 0x390 + (0x6FF00 * slot);
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return GetString(Data, ofs, 16);
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}
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private void SetOTName(int slot, string name)
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{
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var ofs = 0x390 + (0x6FF00 * slot);
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SetData(SetString(name, 7, 8), ofs);
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}
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public string CurrentOT { get => GetOTName(_currentSlot); set => SetOTName(_currentSlot, value); }
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// Storage
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public override int GetPartyOffset(int slot) => Party + (SIZE_PARTY * slot);
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public override int GetBoxOffset(int box) => Box + (SIZE_STORED * box * 30);
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public override int TID
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{
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get => (Data[(_currentSlot * SIZE_SLOT) + 0x12867] << 8) | Data[(_currentSlot * SIZE_SLOT) + 0x12860];
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set
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{
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Data[(_currentSlot * SIZE_SLOT) + 0x12867] = (byte)(value >> 8);
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Data[(_currentSlot * SIZE_SLOT) + 0x12860] = (byte)(value & 0xFF);
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}
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}
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public override int SID
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{
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get => (Data[(_currentSlot * SIZE_SLOT) + 0x12865] << 8) | Data[(_currentSlot * SIZE_SLOT) + 0x12866];
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set
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{
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Data[(_currentSlot * SIZE_SLOT) + 0x12865] = (byte)(value >> 8);
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Data[(_currentSlot * SIZE_SLOT) + 0x12866] = (byte)(value & 0xFF);
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}
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}
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// Save file does not have Box Name / Wallpaper info
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private int BoxName = -1;
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private const int BoxNameLength = 0x28;
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public override string GetBoxName(int box)
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{
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if (BoxName < 0)
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return $"BOX {box + 1}";
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int ofs = BoxName + (box * BoxNameLength);
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var str = GetString(ofs, BoxNameLength);
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if (string.IsNullOrWhiteSpace(str))
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return $"BOX {box + 1}";
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return str;
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}
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public override void SetBoxName(int box, string value)
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{
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if (BoxName < 0)
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return;
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int ofs = BoxName + (box * BoxNameLength);
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var str = GetString(ofs, BoxNameLength);
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if (string.IsNullOrWhiteSpace(str))
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return;
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var data = SetString(value, BoxNameLength / 2, BoxNameLength / 2);
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SetData(data, ofs);
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}
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protected override PKM GetPKM(byte[] data)
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{
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if (data.Length != SIZE_STORED)
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Array.Resize(ref data, SIZE_STORED);
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return BK4.ReadUnshuffle(data);
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}
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protected override byte[] DecryptPKM(byte[] data) => data;
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protected override void SetDex(PKM pkm) { /* There's no PokéDex */ }
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protected override void SetPKM(PKM pkm, bool isParty = false)
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{
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var pk4 = (BK4)pkm;
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// Apply to this Save File
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DateTime Date = DateTime.Now;
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if (pk4.Trade(OT, TID, SID, Gender, Date.Day, Date.Month, Date.Year))
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pkm.RefreshChecksum();
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}
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protected override void SetPartyValues(PKM pkm, bool isParty)
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{
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pkm.Sanity = isParty ? (ushort)0xC000 : (ushort)0x4000;
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}
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public static byte[] DecryptPBRSaveData(byte[] input)
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{
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byte[] output = new byte[input.Length];
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for (int i = 0; i < SaveUtil.SIZE_G4BR; i += 0x1C0000)
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{
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var keys = GetKeys(input, i);
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Array.Copy(input, i, output, i, 8);
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GeniusCrypto.Decrypt(input, i + 8, i + 0x1C0000, keys, output);
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}
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return output;
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}
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private static byte[] EncryptPBRSaveData(byte[] input)
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{
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byte[] output = new byte[input.Length];
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for (int i = 0; i < SaveUtil.SIZE_G4BR; i += 0x1C0000)
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{
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var keys = GetKeys(input, i);
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Array.Copy(input, i, output, i, 8);
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GeniusCrypto.Encrypt(input, i + 8, i + 0x1C0000, keys, output);
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}
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return output;
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}
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private static ushort[] GetKeys(byte[] input, int ofs)
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{
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ushort[] keys = new ushort[4];
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for (int i = 0; i < keys.Length; i++)
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keys[i] = BigEndian.ToUInt16(input, ofs + (i * 2));
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return keys;
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}
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public static bool VerifyChecksum(byte[] input, int offset, int len, int checksum_offset)
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{
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uint[] storedChecksums = new uint[16];
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for (int i = 0; i < storedChecksums.Length; i++)
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{
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storedChecksums[i] = BigEndian.ToUInt32(input, checksum_offset + (i * 4));
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BitConverter.GetBytes(0u).CopyTo(input, checksum_offset + (i * 4));
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}
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uint[] checksums = new uint[16];
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for (int i = 0; i < len; i += 2)
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{
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uint val = BigEndian.ToUInt16(input, offset + i);
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for (int j = 0; j < 16; j++)
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{
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checksums[j] += ((val >> j) & 1);
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}
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}
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for (int i = 0; i < storedChecksums.Length; i++)
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{
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BigEndian.GetBytes(storedChecksums[i]).CopyTo(input, checksum_offset + (i * 4));
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}
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return checksums.SequenceEqual(storedChecksums);
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}
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private static void SetChecksum(byte[] input, int offset, int len, int checksum_offset)
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{
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uint[] storedChecksums = new uint[16];
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for (int i = 0; i < storedChecksums.Length; i++)
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{
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storedChecksums[i] = BigEndian.ToUInt32(input, checksum_offset + (i * 4));
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BitConverter.GetBytes(0u).CopyTo(input, checksum_offset + (i * 4));
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}
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uint[] checksums = new uint[16];
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for (int i = 0; i < len; i += 2)
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{
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uint val = BigEndian.ToUInt16(input, offset + i);
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for (int j = 0; j < 16; j++)
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checksums[j] += ((val >> j) & 1);
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}
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for (int i = 0; i < checksums.Length; i++)
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{
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BigEndian.GetBytes(checksums[i]).CopyTo(input, checksum_offset + (i * 4));
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}
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}
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public override string GetString(byte[] data, int offset, int length) => StringConverter4.GetBEString4Unicode(data, offset, length);
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public override byte[] SetString(string value, int maxLength, int PadToSize = 0, ushort PadWith = 0) => StringConverter4.SetBEString4Unicode(value, maxLength, PadToSize, PadWith);
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}
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}
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