mirror of
https://github.com/kwsch/PKHeX
synced 2024-12-18 08:23:12 +00:00
47071b41f3
Existing `get`/`set` logic is flawed in that it doesn't work on Big Endian operating systems, and it allocates heap objects when it doesn't need to. `System.Buffers.Binary.BinaryPrimitives` in the `System.Memory` NuGet package provides both Little Endian and Big Endian methods to read and write data; all the `get`/`set` operations have been reworked to use this new API. This removes the need for PKHeX's manual `BigEndian` class, as all functions are already covered by the BinaryPrimitives API. The `StringConverter` has now been rewritten to accept a Span to read from & write to, no longer requiring a temporary StringBuilder. Other Fixes included: - The Super Training UI for Gen6 has been reworked according to the latest block structure additions. - Cloning a Stadium2 Save File now works correctly (opening from the Folder browser list). - Checksum & Sanity properties removed from parent PKM class, and is now implemented via interface.
97 lines
4 KiB
C#
97 lines
4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Security.Cryptography;
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using static System.Buffers.Binary.BinaryPrimitives;
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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 My Pokémon Ranch saves.
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/// </summary>
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public sealed class SAV4Ranch : BulkStorage, ISaveFileRevision
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{
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protected override int SIZE_STORED => 0x88 + 0x1C;
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protected override int SIZE_PARTY => SIZE_STORED;
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public int SaveRevision => Version == GameVersion.DP ? 0 : 1;
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public string SaveRevisionString => Version == GameVersion.DP ? "-DP" : "-Pt";
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public override int BoxCount { get; }
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public override int SlotCount { get; }
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public override PersonalTable Personal => PersonalTable.Pt;
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public override IReadOnlyList<ushort> HeldItems => Legal.HeldItems_Pt;
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protected override SaveFile CloneInternal() => new SAV4Ranch((byte[])Data.Clone());
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public override string PlayTimeString => Checksums.CRC16Invert(Data).ToString("X4");
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protected internal override string ShortSummary => $"{OT} {PlayTimeString}";
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public override string Extension => ".bin";
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protected override PKM GetPKM(byte[] data) => new PK4(data);
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protected override byte[] DecryptPKM(byte[] data) => PokeCrypto.DecryptArray45(data);
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public override StorageSlotFlag GetSlotFlags(int index) => index >= SlotCount ? StorageSlotFlag.Locked : StorageSlotFlag.None;
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protected override bool IsSlotSwapProtected(int box, int slot) => IsSlotOverwriteProtected(box, slot);
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public SAV4Ranch(byte[] data) : base(data, typeof(PK4), 0)
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{
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Version = Data.Length == SaveUtil.SIZE_G4RANCH_PLAT ? GameVersion.Pt : GameVersion.DP;
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OT = GetString(0x770, 0x12);
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// 0x18 starts the header table
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// Block 00, Offset = ???
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// Block 01, Offset = Mii Data
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// Block 02, Offset = Mii Link Data
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// Block 03, Offset = Pokemon Data
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// Block 04, Offset = ??
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// Unpack the binary a little:
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// size, count, Mii data[count]
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// size, count, Mii Link data[count]
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// size, count, Pokemon (PK4 + metadata)[count]
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// size, count, ???
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/* ====Metadata====
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* uint8_t poke_type;// 01 trainer, 04 hayley, 05 traded
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* uint8_t tradeable;// 02 is tradeable, normal 00
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* uint16_t tid;
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* uint16_t sid;
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* uint32_t name1;
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* uint32_t name2;
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* uint32_t name3;
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* uint32_t name4;
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*/
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var pkCountOffset = ReadInt32BigEndian(Data.AsSpan(0x34)) + 4;
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SlotCount = ReadInt32BigEndian(Data.AsSpan(pkCountOffset));
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BoxCount = (int)Math.Ceiling((decimal)SlotCount / SlotsPerBox);
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Box = pkCountOffset + 4;
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FinalCountOffset = ReadInt32BigEndian(Data.AsSpan(0x3C));
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FinalCount = ReadInt32BigEndian(Data.AsSpan(FinalCountOffset));
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}
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private readonly int FinalCount;
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private readonly int FinalCountOffset;
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protected override void SetChecksums()
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{
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// ensure the final data is written if the user screws stuff up
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WriteInt32BigEndian(Data.AsSpan(FinalCountOffset), FinalCount);
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var goodlen = (FinalCountOffset + 4);
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Array.Clear(Data, goodlen, Data.Length - goodlen);
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// 20 byte SHA checksum at the top of the file, which covers all data that follows.
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using var hash = SHA1.Create();
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var result = hash.ComputeHash(Data, 20, Data.Length - 20);
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SetData(result, 0);
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}
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public override string GetString(ReadOnlySpan<byte> data) => StringConverter4GC.GetStringUnicode(data);
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public override int SetString(Span<byte> destBuffer, ReadOnlySpan<char> value, int maxLength, StringConverterOption option)
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{
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return StringConverter4GC.SetStringUnicode(value, destBuffer, maxLength, option);
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}
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}
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}
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