Add FNVHash class for 32-bit and 64-bit hash computations

app/MindWork AI Studio.sln.DotSettings

@@ -2,6 +2,7 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=AI/@EntryIndexedValue">AI</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=EDI/@EntryIndexedValue">EDI</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=ERI/@EntryIndexedValue">ERI</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=FNV/@EntryIndexedValue">FNV</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=GWDG/@EntryIndexedValue">GWDG</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LLM/@EntryIndexedValue">LLM</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LM/@EntryIndexedValue">LM</s:String>

app/MindWork AI Studio/Tools/FNVHash.cs

@@ -0,0 +1,62 @@
+// ReSharper disable MemberCanBePrivate.Global
+namespace AIStudio.Tools;
+
+/// <summary>
+/// Implements the Fowler–Noll–Vo hash function for 32-bit and 64-bit hashes.
+/// </summary>
+public static class FNVHash
+{
+    private const uint FNV_OFFSET_BASIS_32_BIT = 2_166_136_261;
+    private const ulong FNV_OFFSET_BASIS_64_BIT = 14_695_981_039_346_656_037;
+    
+    private const uint FNV_PRIME_32_BIT = 16_777_619;
+    private const ulong FNV_PRIME_64_BIT = 1_099_511_628_211;
+
+    /// <summary>
+    /// Computes the 32bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 32bit FNV-1a hash of the string.</returns>
+    public static uint ToFNV32(this string text) => ToFNV32(text.AsSpan());
+
+    /// <summary>
+    /// Computes the 32bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 32bit FNV-1a hash of the string.</returns>
+    public static uint ToFNV32(this ReadOnlySpan<char> text)
+    {
+        var hash = FNV_OFFSET_BASIS_32_BIT;
+        foreach (var c in text)
+        {
+            hash ^= c;
+            hash *= FNV_PRIME_32_BIT;
+        }
+
+        return hash;
+    }
+    
+    /// <summary>
+    /// Computes the 64bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 64bit FNV-1a hash of the string.</returns>
+    public static ulong ToFNV64(this string text) => ToFNV64(text.AsSpan());
+    
+    /// <summary>
+    /// Computes the 64bit FNV-1a hash of a string.
+    /// </summary>
+    /// <param name="text">The string to hash.</param>
+    /// <returns>The 64bit FNV-1a hash of the string.</returns>
+    public static ulong ToFNV64(this ReadOnlySpan<char> text)
+    {
+        var hash = FNV_OFFSET_BASIS_64_BIT;
+        foreach (var c in text)
+        {
+            hash ^= c;
+            hash *= FNV_PRIME_64_BIT;
+        }
+
+        return hash;
+    }
+}