Hash.cs

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using System.Collections.Immutable;
 
namespace System.Reflection.Internal;
 
internal static class Hash
{
    internal const int FnvOffsetBias = -2128831035;
 
    internal const int FnvPrime = 16777619;
 
    internal static int Combine(int newKey, int currentKey)
    {
        return currentKey * -1521134295 + newKey;
    }
 
    internal static int Combine(uint newKey, int currentKey)
    {
        return currentKey * -1521134295 + (int)newKey;
    }
 
    internal static int Combine(bool newKeyPart, int currentKey)
    {
        return Combine(currentKey, newKeyPart ? 1 : 0);
    }
 
    internal static int GetFNVHashCode(byte[] data)
    {
        int num = -2128831035;
        for (int i = 0; i < data.Length; i++)
        {
            num = (num ^ data[i]) * 16777619;
        }
        return num;
    }
 
    internal static int GetFNVHashCode(ImmutableArray<byte> data)
    {
        int num = -2128831035;
        for (int i = 0; i < data.Length; i++)
        {
            num = (num ^ data[i]) * 16777619;
        }
        return num;
    }
}