PKHeX/PKHeX.Core/Saves/Substructures/Gen6/LinkBlock6.cs
Kurt 47071b41f3
Refactoring: Span-based value writes and method signatures (#3361)
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.
2022-01-02 21:35:59 -08:00

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1.2 KiB
C#

using System;
using static System.Buffers.Binary.BinaryPrimitives;
namespace PKHeX.Core
{
public sealed class LinkBlock6 : SaveBlock
{
public LinkBlock6(SAV6XY sav, int offset) : base(sav) => Offset = offset;
public LinkBlock6(SAV6AO sav, int offset) : base(sav) => Offset = offset;
public byte[] GetLinkInfoData() => Data.Slice(Offset + 0x1FF, PL6.Size);
public PL6 GetLinkInfo() => new(GetLinkInfoData());
public void SetLinkInfoData(ReadOnlySpan<byte> data)
{
data.CopyTo(Data.AsSpan(Offset));
Checksum = GetCalculatedChecksum(); // [app,chk)
}
public void SetLinkInfo(PL6 pl6)
{
pl6.Data.CopyTo(Data, Offset + 0x1FF);
Checksum = GetCalculatedChecksum(); // [app,chk)
}
private ushort GetCalculatedChecksum() => Checksums.CRC16_CCITT(new ReadOnlySpan<byte>(Data, Offset + 0x200, 0xC48 - 4 - 0x200)); // [app,chk)
private int GetChecksumOffset() => Offset + 0xC48 - 4;
public ushort Checksum
{
get => ReadUInt16LittleEndian(Data.AsSpan(GetChecksumOffset()));
set => WriteUInt16LittleEndian(Data.AsSpan(GetChecksumOffset()), value);
}
}
}