29 lines
724 B
C#
29 lines
724 B
C#
using System;
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using System.Globalization;
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namespace Chip8.Replay;
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public static class RomHash
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{
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const ulong fnvOffsetBasis = 14695981039346656037UL;
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const ulong fnvPrime = 1099511628211UL;
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public static ulong compute(byte[] rom)
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{
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ulong hash = fnvOffsetBasis;
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foreach (byte value in rom)
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{
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hash ^= value;
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hash *= fnvPrime;
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}
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return hash;
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}
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public static string toHex(byte[] rom) => format(compute(rom));
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public static string format(ulong hash) => hash.ToString("X16", CultureInfo.InvariantCulture);
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public static ulong parse(string hex) =>
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ulong.Parse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture);
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}
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