/// <summary>
/// 解压原始数据流
/// </summary>
/// <param name="pOut">要输出的目的流</param>
public void ExtractStreamTo(Stream pOut)
{
if (m_Stream == null)
{
// 来自数据包内的流
Stream tBaseStream = m_Package.BaseStream;
// 寻址到数据开始处
tBaseStream.Seek(FCYResPackage.HeaderSize + DataOffset, SeekOrigin.Begin);
// 是否压缩
if (IsCompressed)
{
// 已压缩，解压到目的流
FCYResPackageHelper.DeflateDecodeTo(tBaseStream, pOut, (int)DataRealSize);
}
else
{
// 直接输出到目标流
FCYResPackageHelper.FillStream(tBaseStream, pOut, (int)DataRealSize);
}
}
else // 来自本地的数据流
{
// 直接输出到目标流
FCYResPackageHelper.FillStream(m_Stream, pOut, (int)DataRealSize);
}
}
internal override void WriteToStream(Stream pOut, XmlElement ParentXml)
{
// 记下当前位置
long tPos = pOut.Position;
// 是否是外部流
if (m_Stream == null)
{
// 外部流
Stream tBaseStream = m_Package.BaseStream;
// 寻址
tBaseStream.Seek(FCYResPackage.HeaderSize + m_MainDataOffset, SeekOrigin.Begin);
// 直接复制
FCYResPackageHelper.FillStream(tBaseStream, pOut, (int)(IsCompressed ? DataCompressedSize : DataRealSize));
}
else
{
// 内部流
if (IsCompressed)
{
long tPosStart = pOut.Position;
// 压缩流
m_Stream.Seek(0, SeekOrigin.Begin);
FCYResPackageHelper.DeflateEncodeTo(m_Stream, pOut, (int)DataRealSize);
long tPosEnd = pOut.Position;
// 关闭内部流
m_Stream.Close();
m_Stream = null;
// 更新数据
m_DataCompressedSize = (uint)(tPosEnd - tPosStart);
}
else
{
// 直接复制
m_Stream.Seek(0, SeekOrigin.Begin);
FCYResPackageHelper.FillStream(m_Stream, pOut, (int)DataRealSize);
}
}
// 更新位置
m_MainDataOffset = (uint)tPos - FCYResPackage.HeaderSize;
// 准备Xml数据
XmlElement tElement = ParentXml.OwnerDocument.CreateElement("Node");
tElement.SetAttribute("Name", Name);
tElement.SetAttribute("OrgSize", DataRealSize.ToString());
tElement.SetAttribute("IsCompressed", IsCompressed ? "yes" : "no");
tElement.SetAttribute("CompressedSize", DataCompressedSize.ToString());
tElement.SetAttribute("Offset", DataOffset.ToString());
tElement.InnerText = AdditionData;
// 写出Xml数据
ParentXml.AppendChild(tElement);
}