框架更新

Fantasy/Fantasy.Net/Fantasy.SourceGenerator/Common/HashCodeHelper.cs

@@ -0,0 +1,45 @@
+using System;
+
+namespace Fantasy.SourceGenerator.Common
+{
+    /// <summary>
+    /// HashCode 算法帮助类 (Source Generator 版本)
+    /// 用于在编译时计算类型哈希值
+    /// 注意：此实现必须与 Fantasy.Helper.HashCodeHelper.ComputeHash64 保持完全一致
+    /// </summary>
+    internal static class HashCodeHelper
+    {
+        /// <summary>
+        /// 使用 MurmurHash3 算法生成一个 long 的值
+        /// </summary>
+        /// <param name="str">输入字符串</param>
+        /// <returns>64位哈希值</returns>
+        public static long ComputeHash64(string str)
+        {
+            const ulong seed = 0xc58f1a7bc58f1a7bUL; // 64-bit seed
+            var hash = seed;
+            var c1 = 0x87c37b91114253d5UL;
+            var c2 = 0x4cf5ad432745937fUL;
+
+            for (var i = 0; i < str.Length; i++)
+            {
+                var k1 = (ulong)str[i];
+                k1 *= c1;
+                k1 = (k1 << 31) | (k1 >> (64 - 31));
+                k1 *= c2;
+
+                hash ^= k1;
+                hash = (hash << 27) | (hash >> (64 - 27));
+                hash = hash * 5 + 0x52dce729;
+            }
+
+            hash ^= (ulong)str.Length;
+            hash ^= hash >> 33;
+            hash *= 0xff51afd7ed558ccdUL;
+            hash ^= hash >> 33;
+            hash *= 0xc4ceb9fe1a85ec53UL;
+            hash ^= hash >> 33;
+            return (long)hash;
+        }
+    }
+}