mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-23 12:33:06 +00:00
d47bb1d297
With the new version of Visual Studio bringing C# 12, we can revise our logic for better readability as well as use new methods/APIs introduced in the .NET 8.0 BCL.
55 lines
2.3 KiB
C#
55 lines
2.3 KiB
C#
using System;
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using static System.Buffers.Binary.BinaryPrimitives;
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using static PKHeX.Core.PokeCrypto;
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namespace PKHeX.Core;
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public static class EntityDetection
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{
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/// <summary>
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/// Determines if the given length is valid for a <see cref="PKM"/>.
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/// </summary>
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/// <param name="len">Data length of the file/array.</param>
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/// <returns>A <see cref="bool"/> indicating whether the length is valid for a <see cref="PKM"/>.</returns>
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public static bool IsSizePlausible(long len) => len is
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SIZE_1JLIST or SIZE_1ULIST or
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SIZE_2ULIST or SIZE_2JLIST or SIZE_2STADIUM or
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SIZE_3STORED or SIZE_3PARTY or
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SIZE_3CSTORED or SIZE_3XSTORED or
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SIZE_4STORED or SIZE_4PARTY or SIZE_4RSTORED or
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SIZE_5PARTY or
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SIZE_6STORED or SIZE_6PARTY or
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SIZE_8STORED or SIZE_8PARTY or
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SIZE_8ASTORED or SIZE_8APARTY or
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SIZE_9STORED or SIZE_9PARTY
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;
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public static bool IsPresentGB(ReadOnlySpan<byte> data) => data[0] != 0; // Species non-zero
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public static bool IsPresentGC(ReadOnlySpan<byte> data) => ReadUInt16BigEndian(data) != 0; // Species non-zero
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public static bool IsPresentGBA(ReadOnlySpan<byte> data) => (data[0x13] & 0xFB) == 2; // ignore egg flag, must be FlagHasSpecies.
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public static bool IsPresentSAV4Ranch(ReadOnlySpan<byte> data) => ReadUInt32LittleEndian(data) != 0 && ReadUInt32BigEndian(data) != 0x28; // Species non-zero, ignore file end marker
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public static bool IsPresent(ReadOnlySpan<byte> data)
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{
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if (ReadUInt32LittleEndian(data) != 0) // PID
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return true;
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ushort species = ReadUInt16LittleEndian(data[8..]);
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return species != 0;
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}
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/// <summary>
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/// Gets a function that can check a byte array (at an offset) to see if a <see cref="PKM"/> is possibly present.
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/// </summary>
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/// <param name="blank"></param>
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/// <returns>Function that checks if a byte array (at an offset) has a <see cref="PKM"/> present</returns>
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public static Func<byte[], bool> GetFuncIsPresent(PKM blank)
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{
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if (blank.Format >= 4)
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return x => IsPresent(x);
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if (blank.Format <= 2)
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return x => IsPresentGB(x);
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if (blank.Data.Length <= SIZE_3PARTY)
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return x => IsPresentGBA(x);
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return x => IsPresentGC(x);
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}
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}
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