mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-30 07:50:32 +00:00
331 lines
12 KiB
C#
331 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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using System.Text;
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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 override string BAKText => $"{Version} #{SaveCount:0000}";
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public override string Filter => "PbrSaveData|*";
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public override string Extension => string.Empty;
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private const int SAVE_COUNT = 4;
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public SAV4BR(byte[] data = null)
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{
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Data = data ?? new byte[SaveUtil.SIZE_G4BR];
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BAK = (byte[])Data.Clone();
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Exportable = !IsRangeEmpty(0, Data.Length);
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if (SaveUtil.GetIsG4BRSAV(Data) != GameVersion.BATREV)
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return;
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Data = DecryptPBRSaveData(data);
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// Detect active save
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SaveCount = Math.Max(BigEndian.ToUInt32(Data, 0x1C004C), BigEndian.ToUInt32(Data, 0x4C));
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if (BigEndian.ToUInt32(Data, 0x1C004C) > BigEndian.ToUInt32(Data, 0x4C))
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{
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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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for (int i = 0; i < SAVE_COUNT; i++)
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{
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if (!IsOTNamePresent(i))
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continue;
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SaveSlots.Add(i);
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SaveNames.Add(GetOTName(i).Trim());
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}
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CurrentSlot = SaveSlots[0];
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Personal = PersonalTable.DP;
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HeldItems = Legal.HeldItems_DP;
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if (!Exportable)
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ClearBoxes();
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}
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private bool IsOTNamePresent(int i)
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{
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return BitConverter.ToUInt16(Data, 0x390 + (0x6FF00 * i)) != 0;
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}
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private readonly uint SaveCount;
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protected override byte[] Write(bool DSV)
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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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public override SaveFile Clone() { return new SAV4BR(Write(DSV: false)); }
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public readonly List<int> SaveSlots = new List<int>(SAVE_COUNT);
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public readonly List<string> SaveNames = new List<string>(SAVE_COUNT);
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private int _currentSlot;
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public int CurrentSlot
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{
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get => SaveSlots.IndexOf(_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 = SaveSlots[value];
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var ofs = 0x6FF00 * _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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public override int SIZE_STORED => PKX.SIZE_4STORED;
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protected override int SIZE_PARTY => PKX.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 i)
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{
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return Encoding.BigEndianUnicode.GetString(Data, 0x390 + (0x6FF00 * i), 0x10);
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}
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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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// 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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var str = Encoding.BigEndianUnicode.GetString(Data, BoxName + (box * BoxNameLength), BoxNameLength);
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str = Util.TrimFromZero(str);
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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 = Encoding.BigEndianUnicode.GetString(Data, ofs, BoxNameLength);
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str = Util.TrimFromZero(str);
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if (string.IsNullOrWhiteSpace(str))
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return;
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var data = Encoding.BigEndianUnicode.GetBytes(value.PadLeft(BoxNameLength / 2, '\0'));
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SetData(data, ofs);
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}
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public 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 new BK4(data);
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}
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public 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)
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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 = (ushort)(isParty ? 0xC000 : 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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ushort[] keys = new ushort[4];
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for (int base_ofs = 0; base_ofs < SaveUtil.SIZE_G4BR; base_ofs += 0x1C0000)
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{
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Array.Copy(input, base_ofs, output, base_ofs, 8);
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for (int i = 0; i < keys.Length; i++)
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keys[i] = BigEndian.ToUInt16(input, base_ofs + (i * 2));
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for (int ofs = base_ofs + 8; ofs < base_ofs + 0x1C0000; ofs += 8)
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{
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for (int i = 0; i < keys.Length; i++)
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{
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ushort val = BigEndian.ToUInt16(input, ofs + (i * 2));
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val -= keys[i];
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output[ofs + (i * 2)] = (byte)(val >> 8);
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output[ofs + (i * 2) + 1] = (byte)val;
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}
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SaveUtil.AdvanceGCKeys(keys);
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}
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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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ushort[] keys = new ushort[4];
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for (int base_ofs = 0; base_ofs < SaveUtil.SIZE_G4BR; base_ofs += 0x1C0000)
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{
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Array.Copy(input, base_ofs, output, base_ofs, 8);
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for (int i = 0; i < keys.Length; i++)
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keys[i] = BigEndian.ToUInt16(input, base_ofs + (i * 2));
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for (int ofs = base_ofs + 8; ofs < base_ofs + 0x1C0000; ofs += 8)
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{
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for (int i = 0; i < keys.Length; i++)
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{
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ushort val = BigEndian.ToUInt16(input, ofs + (i * 2));
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val += keys[i];
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output[ofs + (i * 2)] = (byte)(val >> 8);
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output[ofs + (i * 2) + 1] = (byte)val;
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}
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SaveUtil.AdvanceGCKeys(keys);
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}
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}
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return output;
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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((uint)0).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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ushort 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] += (uint)((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((uint)0).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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ushort val = BigEndian.ToUInt16(input, offset + i);
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for (int j = 0; j < 16; j++)
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checksums[j] += (uint)((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) => StringConverter.GetBEString4(data, offset, length);
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public override byte[] SetString(string value, int maxLength, int PadToSize = 0, ushort PadWith = 0)
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{
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if (PadToSize == 0)
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PadToSize = maxLength + 1;
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return StringConverter.SetBEString4(value, maxLength, PadToSize, PadWith);
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}
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}
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}
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