Daily update 2 on 20240228 by nitload youmu

2025-03-01 04:58:46 +08:00
parent 90d5f76511
commit f22862dfc4
983 changed files with 180004 additions and 0 deletions
@@ -0,0 +1,184 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="DataSegment.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using StgSharp.HighPerformance;
+using StgSharp.HighPerformance;
+using StgSharp.Internal.Intrinsic;
+
+using StgSharp.Math;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StgSharp.Internal
+{
+    [StructLayout( LayoutKind.Explicit, Size = StgSharp.ssdSegmentLength * 16 )]
+    public unsafe struct SSDSegment : IComparable<int>, IComparable<SSDSegment>
+    {
+
+        [FieldOffset( 16 )] public fixed byte Data[
+            16 * ( StgSharp.ssdSegmentLength - 1 ) ];
+        [FieldOffset( 12 )] public int DataHash;
+        [FieldOffset( 8 )] public int PreviousHash;
+        [FieldOffset( 0 * 16 )] public SSDSegmentHead Head;
+
+        public SSDSegment( int previousHash )
+        {
+            this.PreviousHash = previousHash;
+        }
+
+        public byte this[ int index ]
+        {
+            get
+            {
+                if( index > ( 16 * ( StgSharp.ssdSegmentLength - 1 ) ) - 1 ) {
+                    throw new IndexOutOfRangeException();
+                }
+                return Data[ index ];
+            }
+
+            set
+            {
+                if( index > ( 16 * ( StgSharp.ssdSegmentLength - 1 ) ) - 1 ) {
+                    throw new IndexOutOfRangeException();
+                }
+                Data[ index ] = value;
+            }
+        }
+
+        public int ID
+        {
+            get { return Head.globalID; }
+            set { Head.globalID = value; }
+        }
+
+        public short Size => Head.size;
+
+        public void FillRandomBytes( int begin )
+        {
+            if( begin > 255 ) {
+                return;
+            }
+            for( int i = begin; i < 255; i++ ) {
+                Data[ i ] = Scaler.Random<byte>();
+            }
+        }
+
+        public static SSDSegment FromStream( byte[] stream )
+        {
+            if( stream.Length != 16 * StgSharp.ssdSegmentLength ) {
+                throw new ArgumentException();
+            }
+            SSDSegment ret = new SSDSegment();
+            fixed( byte* bptr = stream ) {
+                ret.Head.data = *( M128* )bptr;
+                for( int i = 1; i < StgSharp.ssdSegmentLength; i++ ) {
+                    ret.WriteData<M128>(
+                        i - 1, *( M128* )( bptr + ( 16 * i ) ) );
+                }
+            }
+            return ret;
+        }
+
+        public byte[] GetBytes()
+        {
+            byte[] ret = new byte[16 * StgSharp.ssdSegmentLength];
+            fixed( M128* mptr = &Head.data ) {
+                fixed( byte* aptr = ret ) {
+                    Vector4* vsptr = ( Vector4* )mptr;
+                    Vector4* vtptr = ( Vector4* )aptr;
+                    for( int i = 0; i < 18; i++ ) {
+                        *( vtptr + i ) = *( vsptr + i );
+                    }
+                }
+            }
+
+            return ret;
+        }
+
+        public int GetDataHash()
+        {
+            Vector4 v = Vector4.One;
+            fixed( M128* mptr = &Head.data ) {
+                Vector4* vptr = ( Vector4* )mptr;
+                for( int i = 0; i < StgSharp.ssdSegmentLength - 1; i += 1 ) {
+                    v += ( *vptr ) * 31;
+                }
+            }
+            M128 m = new M128( v );
+            DataHash = m.Vec.GetHashCode();
+            return DataHash;
+        }
+
+        public override int GetHashCode()
+        {
+            int ret = 17;
+            fixed( M128* mptr = &Head.data ) {
+                Vector4* vptr = ( Vector4* )mptr;
+                for( int i = 0; i < StgSharp.ssdSegmentLength; i++ ) {
+                    ret = ( ret + ( *vptr ).GetHashCode() ) * 31;
+                }
+            }
+            return ret;
+        }
+
+        public unsafe T ReadData<T>( int index ) where T: struct
+        {
+            fixed( byte* bptr = Data ) {
+                T* tptr = ( T* )bptr;
+                return *( tptr + index );
+            }
+        }
+
+        public unsafe void WriteData<T>( int index, T value ) where T: struct
+        {
+            fixed( byte* bptr = Data ) {
+                T* tptr = ( T* )bptr;
+                *( tptr + index ) = value;
+            }
+        }
+
+        int IComparable<int>.CompareTo( int other )
+        {
+            return ID.CompareTo( other );
+        }
+
+        int IComparable<SSDSegment>.CompareTo( SSDSegment other )
+        {
+            return ID.CompareTo( other.ID );
+        }
+
+    }
+}