mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-24 04:53:08 +00:00
e32bfcde2e
Extract RSBOX checksum logic to checksum class Allocate half as much for gen3 save detect Simplify some expressions for GC save loading (x - size + offset, when x==size)
46 lines
1.3 KiB
C#
46 lines
1.3 KiB
C#
namespace PKHeX.Core
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{
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/// <summary>
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/// Gen3 <see cref="GameVersion.RSBOX"/> Block Info
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/// </summary>
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public sealed class BlockInfoRSBOX : BlockInfo
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{
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public readonly uint SaveCount;
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public readonly uint Checksum;
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public BlockInfoRSBOX(byte[] data, int offset)
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{
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Offset = offset;
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Length = 0x1FFC;
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// Values stored in Big Endian format
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Checksum = BigEndian.ToUInt32(data, Offset + 0);
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ID = BigEndian.ToUInt32(data, Offset + 4);
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SaveCount = BigEndian.ToUInt32(data, Offset + 8);
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}
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protected override bool ChecksumValid(byte[] data)
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{
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var chk = GetChecksum(data);
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var old = BigEndian.ToUInt32(data, Offset);
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return chk == old;
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}
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protected override void SetChecksum(byte[] data)
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{
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var chk = GetChecksum(data);
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data[Offset + 0] = (byte)(chk >> 24);
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data[Offset + 1] = (byte)(chk >> 16);
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data[Offset + 2] = (byte)(chk >> 8);
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data[Offset + 3] = (byte)(chk >> 0);
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}
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private uint GetChecksum(byte[] data)
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{
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int start = Offset + 4;
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int end = start + Length - 4;
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return Checksums.CheckSum16BigInvert(data, start, end);
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}
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}
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}
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