Core/Misc: Cleanups and misc edits

2018-03-01 17:23:27 -05:00
parent f0916a5a0e
commit abbdd261b4
7 changed files with 198 additions and 431 deletions
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2012-2018 CypherCore <http://github.com/CypherCore>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using Framework.IO;
+using System;
+
+namespace Game.DataStorage
+{
+    public class BitReader
+    {
+        private byte[] m_array;
+        private int m_readPos;
+        private int m_readOffset;
+
+        public int Position { get => m_readPos; set => m_readPos = value; }
+        public int Offset { get => m_readOffset; set => m_readOffset = value; }
+        public byte[] Data { get => m_array; set => m_array = value; }
+
+        public BitReader(byte[] data)
+        {
+            m_array = data;
+        }
+
+        public BitReader(byte[] data, int offset)
+        {
+            m_array = data;
+            m_readOffset = offset;
+        }
+
+        public uint ReadUInt32(int numBits)
+        {
+            uint result = FastStruct<uint>.ArrayToStructure(ref m_array[m_readOffset + (m_readPos >> 3)]) << (32 - numBits - (m_readPos & 7)) >> (32 - numBits);
+            m_readPos += numBits;
+            return result;
+        }
+
+        public ulong ReadUInt64(int numBits)
+        {
+            ulong result = FastStruct<ulong>.ArrayToStructure(ref m_array[m_readOffset + (m_readPos >> 3)]) << (64 - numBits - (m_readPos & 7)) >> (64 - numBits);
+            m_readPos += numBits;
+            return result;
+        }
+
+        public Value32 ReadValue32(int numBits)
+        {
+            unsafe
+            {
+                ulong result = ReadUInt32(numBits);
+                return *(Value32*)&result;
+            }
+        }
+
+        public Value64 ReadValue64(int numBits)
+        {
+            unsafe
+            {
+                ulong result = ReadUInt64(numBits);
+                return *(Value64*)&result;
+            }
+        }
+    }
+
+    public struct Value32
+    {
+        unsafe fixed byte Value[4];
+
+        public T GetValue<T>() where T : struct
+        {
+            unsafe
+            {
+                fixed (byte* ptr = Value)
+                    return FastStruct<T>.ArrayToStructure(ref ptr[0]);
+            }
+        }
+
+        public byte[] GetBytes(int bitSize)
+        {
+            if (((bitSize + 7) / 8) != NextPow2((bitSize + 7) / 8))
+            {
+
+            }
+
+            byte[] data = new byte[NextPow2((bitSize + 7) / 8)];
+            unsafe
+            {
+                fixed (byte* ptr = Value)
+                {
+                    for (var i = 0; i < data.Length; ++i)
+                        data[i] = ptr[i];
+                }
+            }
+
+            return data;
+        }
+
+        private int NextPow2(int v)
+        {
+            v--;
+            v |= v >> 1;
+            v |= v >> 2;
+            v |= v >> 4;
+            v |= v >> 8;
+            v |= v >> 16;
+            v++;
+            return Math.Max(v, 1);
+        }
+    }
+
+    public struct Value64
+    {
+        unsafe fixed byte Value[8];
+
+        public T GetValue<T>() where T : struct
+        {
+            unsafe
+            {
+                fixed (byte* ptr = Value)
+                    return FastStruct<T>.ArrayToStructure(ref ptr[0]);
+            }
+        }
+
+        public byte[] GetBytes(int bitSize)
+        {
+            var val = ((bitSize + 7) / 8);
+            var val1 = NextPow2((bitSize + 7) / 8);
+            if (val != val1)
+            {
+
+            }
+
+            byte[] data = new byte[NextPow2((bitSize + 7) / 8)];
+            unsafe
+            {
+                fixed (byte* ptr = Value)
+                {
+                    for (var i = 0; i < data.Length; ++i)
+                        data[i] = ptr[i];
+                }
+            }
+
+            return data;
+        }
+
+        private int NextPow2(int v)
+        {
+            v--;
+            v |= v >> 1;
+            v |= v >> 2;
+            v |= v >> 4;
+            v |= v >> 8;
+            v |= v >> 16;
+            v++;
+            return Math.Max(v, 1);
+        }
+    }
+}