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27 lines
1.2 KiB
27 lines
1.2 KiB
using System;
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namespace UnityEditor.XR.ARKit
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{
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internal static class GuidExtensions
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{
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/// <summary>
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/// Assumes the guid is an NSUUID and returns a string in the same format as
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/// [NSUUID.UUIDString](https://developer.apple.com/documentation/foundation/nsuuid/1416585-uuidstring)
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/// </summary>
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/// <param name="guid">The guid to convert to a string</param>
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/// <returns>A string representation of the GUID in "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" format.</returns>
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public static string ToUUIDString(this Guid guid)
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{
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// When converting to a string representation,
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// C# reverses the gender of the last 2 integral components
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// while Core Foundation's NSUUID.UUIDString reverses all 5.
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// We want to generate a string that will match what NSUUID.UUIDString
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// will produce, so we need to reverse the first 3 components.
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var bytes = guid.ToByteArray();
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Array.Reverse(bytes, 0, 4);
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Array.Reverse(bytes, 4, 2);
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Array.Reverse(bytes, 6, 2);
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return new Guid(bytes).ToString("D").ToUpper();
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}
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}
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}
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