mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-27 06:20:25 +00:00
261 lines
9.4 KiB
C#
261 lines
9.4 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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public override string BAKName => $"{FileName} [{Version} #{SaveCount:0000}].bak";
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public override string Filter => "PbrSaveData|*";
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public override string Extension => "";
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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 == null ? new byte[SaveUtil.SIZE_G4BR] : (byte[])data.Clone();
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BAK = (byte[])Data.Clone();
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Exportable = !Data.SequenceEqual(new byte[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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SaveSlots = new List<int>();
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SaveNames = new string[SAVE_COUNT];
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for (int i = 0; i < SAVE_COUNT; i++)
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{
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if (BitConverter.ToUInt16(Data, 0x390 + 0x6FF00*i) != 0)
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{
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SaveSlots.Add(i);
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SaveNames[i] = Encoding.BigEndianUnicode.GetString(Data, 0x390 + 0x6FF00*i, 0x10);
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}
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}
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CurrentSlot = SaveSlots.First();
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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 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;
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public readonly string[] SaveNames;
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public int CurrentSlot;
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protected override int Box { // 4 save slots, data reading depends on current slot
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get => 0x978 + 0x6FF00 * CurrentSlot;
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set { }
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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_4PARTY - 0x10; // PBR has a party
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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 => 123;
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public override int MaxItemID => 536;
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public override int MaxBallID => 0x18;
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public override int MaxGameID => 15;
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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 BoxCount => 18;
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public override bool HasParty => false;
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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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// Storage
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public override int GetPartyOffset(int slot) // TODO
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{
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return -1;
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}
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public override int GetBoxOffset(int box)
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{
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return Box + SIZE_STORED * box * 30;
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}
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// Save file does not have Box Name / Wallpaper info
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public override string GetBoxName(int box) { return $"BOX {box + 1}"; }
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public override void SetBoxName(int box, string value) { }
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public override PKM GetPKM(byte[] data)
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{
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byte[] pkm = data.Take(SIZE_STORED).ToArray();
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PKM bk = new BK4(pkm);
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return bk;
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}
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public override byte[] DecryptPKM(byte[] data)
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{
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return data;
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}
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protected override void SetDex(PKM pkm) { }
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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 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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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, 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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BigEndian.GetBytes(val).CopyTo(output, ofs + i*2);
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}
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keys = 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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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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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, 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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BigEndian.GetBytes(val).CopyTo(output, ofs + i * 2);
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}
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keys = 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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{
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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 < 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(int Offset, int Count) => StringConverter.GetBEString4(Data, Offset, Count);
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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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