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Assets/00.StaryEvo/Runtime/UnitySocket/SocketClient/Scripts/Socket/DataBuffer.cs

@@ -0,0 +1,57 @@
+using System;
+/// <summary>
+/// Socket传输过程的缓冲区，尝试拆包获得数据
+/// </summary>
+public class DataBuffer
+{
+    // 缓存区长度
+    private const int MIN_BUFF_LEN = 1024;
+
+    private byte[] _buff;
+    private int _buffLength = 0;
+
+    public DataBuffer(int minBuffLen = MIN_BUFF_LEN)
+    {
+        if (minBuffLen <= 0)
+        {
+            minBuffLen = MIN_BUFF_LEN;
+        }
+        _buff = new byte[minBuffLen];
+    }
+
+    /// <summary>
+    /// 添加缓存数据
+    /// </summary>
+    public void AddBuffer(byte[] data, int len)
+    {
+        byte[] buff = new byte[len];
+        Array.Copy(data, buff, len);
+        if (len > _buff.Length - _buffLength)  //超过当前缓存
+        {
+            byte[] temp = new byte[_buffLength + len];
+            Array.Copy(_buff, 0, temp, 0, _buffLength);
+            Array.Copy(buff, 0, temp, _buffLength, len);
+            _buff = temp;
+        }
+        else
+        {
+            Array.Copy(data, 0, _buff, _buffLength, len);
+        }
+        _buffLength += len;//修改当前数据标记
+    }
+
+    public bool TryUnpack(out SocketDataPack dataPack)
+    {
+        dataPack = SocketDataPack.Unpack(_buff);
+        if (dataPack == null)
+        {
+            return false;
+        }
+        // 清理旧缓存
+        _buffLength -= dataPack.BuffLength;
+        byte[] temp = new byte[_buffLength < MIN_BUFF_LEN ? MIN_BUFF_LEN : _buffLength];
+        Array.Copy(_buff, dataPack.BuffLength, temp, 0, _buffLength);
+        _buff = temp;
+        return true;
+    }
+}