daily update on 20240506 by nitload youmu

源代码/StgSharp/Math/Scalar/Random.cs

@@ -29,10 +29,15 @@
 //-----------------------------------------------------------------------
 //-----------------------------------------------------------------------
 using StgSharp.Controlling;
+using StgSharp.Math.HighPrecession;
 
 using System;
 using System.Collections.Generic;
+using System.Data;
+using System.Reflection;
 using System.Runtime.CompilerServices;
+using System.Runtime.Intrinsics.Arm;
+using System.Security.Cryptography;
 using System.Text;
 
 namespace StgSharp.Math
@@ -77,14 +82,39 @@ namespace StgSharp.Math
             return result;
 
         }
+
+        private static byte[] randomSeed;
+
         /// <summary>
         /// 
         /// </summary>
         /// <returns></returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static float Random()
+        public static T Random<T>() where T : struct, IConvertible
+#if NET8_0_OR_GREATER
+            ,INumber
+#endif
         {
-            throw new NotImplementedException();
+            if (randomSeed==null)
+            {
+                randomSeed = new byte[64];
+                var originSeed = 
+                    $"{(Assembly.GetEntryAssembly()==null? Assembly.GetAssembly(typeof(StgSharp))!:
+                    Assembly.GetEntryAssembly())}" +
+                    $"{DateTime.UtcNow.ToString("o")}";
+                using (SHA256 sha = SHA256.Create())
+                {
+                    randomSeed = sha.ComputeHash(Encoding.UTF8.GetBytes(originSeed));
+                }
+            }
+            using (SHA256 sha = SHA256.Create())
+            {
+                randomSeed = sha.ComputeHash(randomSeed);
+            }
+            fixed (byte* bptr = randomSeed)
+            {
+                return *(T*)bptr;
+            }
         }
 
         /// <summary>