/// <summary>
/// 数据取出后就从当前列表中移除
/// </summary>
/// <param name="len"></param>
/// <returns></returns>
public byte[] getBytes(int len)
{
if (available() < len)
{
return(null);
}
if (Count < 1)
{
return(null);
}
byte[] data = new byte[len];
int offset = 0;
while (offset < data.Length)
{
ArraySegment <byte> seg = this[0];
if (offset + seg.Count > len)
{
Buffer.BlockCopy(seg.Array, seg.Offset, data, offset, len - offset);
updateOffset(seg.Offset + (len - offset));
return(data);
}
else
{
Buffer.BlockCopy(seg.Array, seg.Offset, data, offset, seg.Count);
offset += seg.Count;
this.RemoveAt(0);
//回收seg( 如果是规范内的buf长度 128b/256b/512b/1024b/...)
//如果不是通过
ByteListPoolMgr.FreeBuf(seg.Array);
}
}
// UnityEngine.Debug.Log("EXIT LOOP????!??!?!?!?? ");
return(data);
}
protected void Dispose(bool Disposing)
{
if (m_IsDispose)
{
return;
}
m_IsDispose = true;
if (Disposing)
{
//主动释放，则回收
for (int i = this.Count - 1; i >= 0; i--)
{
ByteListPoolMgr.FreeBuf(this[i].Array);
}
base.Clear();
}
}
/// <summary>
/// ArraySegmen.array最大长度为64K,超过64K报错
/// </summary>
/// <returns></returns>
public ByteListStream Copy()
{
ByteListStream bs = new ByteListStream();
for (int i = 0; i < this.Count; i++)
{
var level = ByteListPoolMgr.CaculBufLevel(this[i].Count);
if (level == ByteListPool.BufferLevel.None)
{
throw new OutOfMemoryException("ArraySegmen.array最大长度超过64K");
}
byte[] buf = ByteListPoolMgr.AllocBuf(level);
Buffer.BlockCopy(this[i].Array, this[i].Offset, buf, 0, this[i].Count);
bs.Add(new ArraySegment <byte>(buf, 0, this[i].Count));
}
return(bs);
}
static void test()
{
//从缓存中取buf 用完回收 最大支持64K缓存数据
Random rn = new Random();
ByteListStream bs = new ByteListStream();
for (int i = 0; i < 10; i++)
{
//从缓存池中申请byte数组
var v128 = ByteListPoolMgr.AllocBuf(ByteListPool.BufferLevel.b128);
rn.NextBytes(v128);
//大数据分片放入ByteListStream
bs.Add(new ArraySegment <byte>(v128));
}
//读取数据
byte[] buf = bs.getBytes(256);
//覆盖读取数据
bs.getBytes(ref buf, 0, 256);
//销毁并回收关联的内存
bs.Dispose();
}
/// <summary>
/// 数据取出后就从当前列表中移除
/// </summary>
/// <param name="len"></param>
/// <returns></returns>
public ByteListStream getBytesTo(int len)
{
if (available() < len)
{
return(null);
}
if (Count < 1)
{
return(null);
}
ByteListStream bs = new ByteListStream();
int offset = 0;
while (offset < len)
{
ArraySegment <byte> seg = this[0];
if (offset + seg.Count > len)
{
var level = ByteListPoolMgr.CaculBufLevel(seg.Count);
byte[] buf = ByteListPoolMgr.AllocBuf(level);
Buffer.BlockCopy(seg.Array, seg.Offset, buf, 0, len - offset);
updateOffset(seg.Offset + (len - offset));
//
bs.Add(new ArraySegment <byte>(buf, 0, len - offset));
break;
}
else
{
//Buffer.BlockCopy(seg.Array, seg.Offset, buf, 0, seg.Count);
offset += seg.Count;
this.RemoveAt(0);
//回收seg 如果不是通过ByteListPoolMgr申请的byte[] 并且长度不是64偶数倍（最大64）的数据将直接丢弃，由GC回收
//ByteListPoolMgr.FreeBuf(seg.Array);
bs.Add(seg);
}
}
return(bs);
}
/// <summary>
/// 数据取出后就从当前列表中移除
/// </summary>
/// <param name="fill2Data">填充数组，外面保证其剩余长度有效性</param>
/// <param name="fill2BuffOffset"></param>
/// <param name="len">外面保证取长度的有效性</param>
public void getBytes(ref byte[] fill2Data, int fill2BuffOffset, int len)
{
if (available() < len)
{
return;
}
if (fill2Data.Length - fill2BuffOffset < len)
{
return;
}
if (Count < 1)
{
return;
}
//填充到数组
int offset = 0;
while (offset < len)
{
ArraySegment <byte> seg = this[0];
if (offset + seg.Count > len)
{
Buffer.BlockCopy(seg.Array, seg.Offset, fill2Data, offset + fill2BuffOffset, len - offset);
updateOffset(seg.Offset + (len - offset));
break;
}
else
{
Buffer.BlockCopy(seg.Array, seg.Offset, fill2Data, offset + fill2BuffOffset, seg.Count);
offset += seg.Count;
this.RemoveAt(0);
//回收seg 如果不是通过ByteListPoolMgr申请的byte[] 并且长度不是64偶数倍（最大64）的数据将直接丢弃，由GC回收
ByteListPoolMgr.FreeBuf(seg.Array);
}
}
}
