Libs/TokenizerLib/src/Utils/BytePairComparer.cs

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Collections.Generic;
 
namespace PSOpenAI.TokenizerLib.Utils
{
    internal class ByteArrayComparer : IEqualityComparer<byte[]>
    {
        public bool Equals(byte[] x, byte[] y)
        {
            if (x == null || y == null)
            {
                return x == y;
            }
            if (x.Length != y.Length)
            {
                return false;
            }
            for (int i = 0; i < x.Length; i++)
            {
                if (x[i] != y[i])
                {
                    return false;
                }
            }
            return true;
        }
 
        public int GetHashCode(byte[] bytes)
        {
            if (bytes == null)
            {
                throw new ArgumentNullException(nameof(bytes));
            }
            int hash = 17;
            foreach (byte b in bytes)
            {
                hash = hash * 31 + b;
            }
            return hash;
        }
    }
}