63 lines
2.6 KiB
C#
63 lines
2.6 KiB
C#
// --------------------------------------------------------------------------------------------------------------------
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// <copyright file="GuidExt.cs" company="VRMADA">
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// Copyright (c) VRMADA, All rights reserved.
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// </copyright>
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// --------------------------------------------------------------------------------------------------------------------
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using System;
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using System.Security.Cryptography;
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namespace UltimateXR.Extensions.System
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{
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public static class GuidExt
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{
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#region Public Methods
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/// <summary>
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/// Throws an exception if the object has the default Guid.
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/// </summary>
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/// <param name="self">Guid to check</param>
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/// <param name="paramName">Parameter name, used as argument for the exception message or null to not use it</param>
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/// <exception cref="ArgumentNullException">Thrown if the object is the default Guid (default or <see cref="Guid.Empty" />)</exception>
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public static void ThrowIfDefault(this Guid self, string paramName)
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{
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if (self == Guid.Empty)
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{
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if (paramName == null)
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{
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throw new Exception("Guid cannot be empty");
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}
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throw new Exception($"Guid is empty for parameter {paramName}");
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}
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}
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/// <summary>
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/// Combines two Guid instances to create a new unique Guid.
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/// </summary>
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/// <param name="guid1">The first Guid to combine</param>
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/// <param name="guid2">The second Guid to combine</param>
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/// <returns>A new Guid that is a combination of the input Guids</returns>
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public static Guid Combine(Guid guid1, Guid guid2)
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{
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byte[] bytes1 = guid1.ToByteArray();
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byte[] bytes2 = guid2.ToByteArray();
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// Concatenate the byte arrays
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byte[] combinedBytes = new byte[bytes1.Length + bytes2.Length];
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Buffer.BlockCopy(bytes1, 0, combinedBytes, 0, bytes1.Length);
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Buffer.BlockCopy(bytes2, 0, combinedBytes, bytes1.Length, bytes2.Length);
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// Use SHA-256 hash function to generate a unique hash
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using SHA256 sha256 = SHA256.Create();
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byte[] hashBytes = sha256.ComputeHash(combinedBytes);
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// Take the first 16 bytes of the hash to create a new Guid
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byte[] guidBytes = new byte[16];
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Buffer.BlockCopy(hashBytes, 0, guidBytes, 0, guidBytes.Length);
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return new Guid(guidBytes);
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}
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#endregion
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}
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} |