private void read(fileBlockStream.index index, ref fastCSharp.code.cSharp.tcpBase.subByteArrayEvent buffer, Func<fastCSharp.code.cSharp.asynchronousMethod.returnValue<fastCSharp.code.cSharp.tcpBase.subByteArrayEvent>, bool> onReturn)
{
fileBlockStream fileStream = this.fileStream;
if (fileStream == null) onReturn(default(fastCSharp.code.cSharp.tcpBase.subByteArrayEvent));
else fileStream.Read(index, onReturn);
}
/// <summary>
/// 开始读取文件
/// </summary>
public unsafe void Read()
{
do
{
int readSize = index.Size + sizeof(int);
try
{
if (FileStream.isDisposed == 0)
{
buffer = (memoryPool = memoryPool.GetPool(readSize)).Get();
FileStream fileReader = FileStream.fileReader;
long offset = fileReader.Position - index.Index;
if (offset >= 0 || -offset < index.Index) fileReader.Seek(offset, SeekOrigin.Current);
else fileReader.Seek(index.Index, SeekOrigin.Begin);
if (fileReader.Read(buffer, 0, readSize) == readSize)
{
fixed (byte* bufferFixed = buffer)
{
if (*(int*)bufferFixed == index.Size) readSize = index.Size;
else log.Default.Add(FileStream.FileName + " index[" + index.Index.toString() + "] size[" + (*(int*)bufferFixed).toString() + "]<>" + index.Size.toString(), false, false);
}
}
else readSize = 0;
}
}
catch (Exception error)
{
log.Default.Add(error, null, false);
}
Func<fastCSharp.code.cSharp.asynchronousMethod.returnValue<fastCSharp.code.cSharp.tcpBase.subByteArrayEvent>, bool> onReaded = this.onReaded;
if (readSize == index.Size)
{
if (onReaded(new fastCSharp.code.cSharp.tcpBase.subByteArrayEvent { Buffer = subArray<byte>.Unsafe(buffer, sizeof(int), index.Size), Event = memoryPool.PushSubArray })) buffer = null;
else memoryPool.Push(ref buffer);
}
else
{
onReaded(default(fastCSharp.code.cSharp.tcpBase.subByteArrayEvent));
if (memoryPool != null) memoryPool.Push(ref buffer);
}
reader next = FileStream.next(this);
if (next == null)
{
FileStream = null;
onReaded = null;
memoryPool = null;
typePool<reader>.Push(this);
return;
}
onReaded = next.onReaded;
index = next.index;
next.onReaded = null;
typePool<reader>.Push(next);
}
while (true);
}
/// <summary>
/// 文件分块服务
/// </summary>
/// <param name="fileName">文件全名</param>
public fileBlockServer(string fileName)
{
fileStream = new fileBlockStream(fileName);
}