From 7c7ce9acb93d320bccda01d01633ad29cc7fe0ad Mon Sep 17 00:00:00 2001
From: ahmed <ahmed@esiur.com>
Date: Sun, 23 Nov 2025 19:41:52 +0300
Subject: [PATCH] GetHashCode

---
 Esiur/Data/UUID.cs | 30 ++++++++++++++++++++++++++++--
 Esiur/Esiur.csproj |  2 +-
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/Esiur/Data/UUID.cs b/Esiur/Data/UUID.cs
index 7458d50..54f155a 100644
--- a/Esiur/Data/UUID.cs
+++ b/Esiur/Data/UUID.cs
@@ -57,7 +57,25 @@ namespace Esiur.Data
             //e6 = data[offset++];
         }
 
-        public UUID(byte[] data) {
+        public unsafe override int GetHashCode()
+        {
+            unchecked
+            {
+                fixed (byte* p = Data)
+                {
+                    ulong u0 = *(ulong*)p;
+                    ulong u1 = *(ulong*)(p + 8);
+
+                    // simple mixing of two 64-bit halves
+                    return ((int)u0 ^ (int)(u0 >> 32)) ^
+                           ((int)u1 ^ (int)(u1 >> 32));
+                }
+            }
+
+        }
+
+        public UUID(byte[] data)
+        {
 
             if (data.Length != 16)
                 throw new Exception("UUID data size must be 16 bytes");
@@ -88,7 +106,15 @@ namespace Esiur.Data
             //return $"{a1.ToString("x2")}{a2.ToString("x2")}{a3.ToString("x2")}{a4.ToString("x2")}-{b1.ToString("x2")}{b2.ToString("x2")}-{c1.ToString("x2")}{c2.ToString("x2")}-{d1.ToString("x2")}{d2.ToString("x2")}-{e1.ToString("x2")}{e2.ToString("x2")}{e3.ToString("x2")}{e4.ToString("x2")}{e5.ToString("x2")}{e6.ToString("x2")}";
         }
 
-        public static bool operator == (UUID a, UUID b)
+        public override bool Equals(object obj)
+        {
+            if (obj is UUID b)
+                return Data.SequenceEqual(b.Data);
+
+            return false;
+        }
+
+        public static bool operator ==(UUID a, UUID b)
         {
             return a.Data.SequenceEqual(b.Data);
 
diff --git a/Esiur/Esiur.csproj b/Esiur/Esiur.csproj
index 6d1fc7e..fc63c66 100644
--- a/Esiur/Esiur.csproj
+++ b/Esiur/Esiur.csproj
@@ -5,7 +5,7 @@
 		<Copyright>Ahmed Kh. Zamil</Copyright>
 		<PackageProjectUrl>http://www.esiur.com</PackageProjectUrl>
 		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-		<Version>2.4.13</Version>
+		<Version>2.4.14</Version>
 		<RepositoryUrl>https://github.com/esiur/esiur-dotnet</RepositoryUrl>
 		<Authors>Ahmed Kh. Zamil</Authors>
 		<AssemblyVersion></AssemblyVersion>