daily update on 20240514 by nitload youmu

2024-05-14 15:41:22 +08:00
parent a3506c96a3
commit 2e57126ab7
75 changed files with 3572 additions and 198 deletions
@@ -0,0 +1,156 @@
+using StgSharp.Data;
+
+using System;
+using System.IO;
+using System.Numerics;
+using System.Security.Cryptography;
+using System.Text;
+using System.Transactions;
+using System.Xml;
+using System.Xml.Serialization;
+
+namespace StgSharp.Data
+{
+    public class RandomGenerator
+    {
+
+
+        private readonly byte[] originKey;
+        private byte[] currentKey;
+        private int cycleCount;
+        private SHA512 hash;
+
+        public RandomGenerator():this(DateTime.UtcNow.ToBinary())
+        {
+            
+        }
+
+        public RandomGenerator(object source)
+        {
+            try
+            {
+                if (source == null)
+                {
+                    throw new ArgumentNullException(nameof(source));
+                }
+                XmlSerializer s = new XmlSerializer(source.GetType());
+                using (StringWriter sw = new StringWriter())
+                {
+                    s.Serialize(sw, source);
+                    string data = sw.ToString();
+                    originKey = Encoding.UTF8.GetBytes(data);
+                }
+            }
+            catch (Exception)
+            {
+                throw;
+            }
+            hash = SHA512.Create();
+            originKey = hash.ComputeHash(originKey);
+            currentKey = originKey;
+            cycleCount = 0;
+        }
+
+        public int TotalGeneratedRandom
+        {
+            get => cycleCount;
+        }
+
+        public unsafe int GenRandomInt()
+        {
+            M128 source = PrivateRand();
+            cycleCount++;
+
+            /*
+            float d0 =  MathF.Sin(1 / source.Read<float>(0));
+            float d1 =  MathF.Sin(1 / source.Read<float>(1));
+            float d2 =  MathF.Sin(1 / source.Read<float>(2));
+            float d3 =  MathF.Sin(1 / source.Read<float>(3));
+
+            source.Write<short>(0, *( short*)&d3);
+            source.Write<short>(2, *((short*)&d2+1));
+            source.Write<short>(4, *( short*)&d1);
+            source.Write<short>(6, *((short*)&d0+1));
+
+            /**/
+
+            return source.Read<int>(cycleCount % 4);
+        }
+
+        public float GenRandomSingle()
+        {
+            cycleCount++;
+            
+            while (true)
+            {
+                M128 source = PrivateRand();
+                
+                uint
+                    temp0 = source.Read<uint>(0),
+                    temp1 = source.Read<uint>(2);
+
+                if (temp0 * temp1 != 0)
+                {
+                    float ret = (temp0 % temp1) * 1.0f / temp1;
+                    if (ret < 0.335f)
+                    {
+                        ret = ret * (ret * -0.7811934f + 1.4489113f);
+                    }
+                    else 
+                    {
+                        ret = ret * (ret * -0.1158368f + 1.0580600f) + 0.0590584f;
+                    }
+                    if (ret > 1)
+                    {
+                        continue;
+                    }
+                    return ret;
+                }
+
+            }
+
+        }
+
+        public byte GenRandomInt8()
+        {
+            cycleCount++;
+            if (cycleCount % 64 == 0)
+            {
+                PrivateRand();
+            }
+            return (byte)(currentKey[ cycleCount % 64 ]);
+        }
+
+        private unsafe M128 PrivateRand()
+        {
+            currentKey = hash.ComputeHash(currentKey);
+            M128 ret;
+            fixed (byte* bptr = currentKey)
+            {
+                switch ((cycleCount % 16) / 4) 
+                {
+                    case 0:
+                        ret= *((M128*)bptr + 0);break;
+                    case 1:
+                        ret= *((M128*)bptr + 1);break;
+                    case 2:
+                        ret= *((M128*)bptr + 2);break;
+                    case 3:
+                        ret= *((M128*)bptr + 3);break;
+                    default:
+                        throw new InvalidOperationException();
+                }
+            }
+            //Console.WriteLine(ret.ToString(16));
+            return ret;
+        }
+
+
+        public void Reset()
+        {
+            currentKey = originKey;
+            cycleCount = 0;
+        }
+
+    }
+}