/// <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);
}
}
/// <summary>
/// 从文件创建
/// </summary>
/// <param name="Path">文件路径</param>
public FCYResPackage(string Path)
{
m_BaseStream = null;
try
{
m_BaseStream = new FileStream(Path, FileMode.Open, FileAccess.ReadWrite, FileShare.Read);
}
catch (IOException e)
{
throw new FCYExcpOpenErr(e.Message);
}
m_FilePath = Path;
BinaryReader tReader = new BinaryReader(m_BaseStream);
// 读取文件头
readDataHeader(BaseStream);
// 至索引区
m_BaseStream.Seek(m_IndexOffset, SeekOrigin.Begin);
// 读取Xml数据大小
uint tXmlDataSize = tReader.ReadUInt32();
// 读取Xml数据并解压
MemoryStream tXmlMem = FCYResPackageHelper.DeflateDecode(m_BaseStream, (int)tXmlDataSize);
// 创建Xml文档
XmlDocument tXmlDoc = new XmlDocument();
tXmlDoc.Load(tXmlMem);
// 读取数据
m_Root = new FCYResPackageFloderNode(this, null, (XmlElement)tXmlDoc.SelectSingleNode("Res"));
// 关闭Xml数据
tXmlMem.Close();
}
/// <summary>
/// 保存包至
/// </summary>
/// <param name="Path">文件路径</param>
public void Save(string FilePath)
{
string tOrgFile = null;
if (FilePath == m_FilePath)
{
tOrgFile = FilePath;
FilePath += ".temp";
}
FileStream tNewStream = null;
// 最高权限打开流
try
{
tNewStream = new FileStream(FilePath, FileMode.Create, FileAccess.ReadWrite, FileShare.Read);
}
catch (IOException e)
{
throw new FCYExcpSaveErr(e.Message);
}
m_FilePath = FilePath;
// 写出头
writeDataHeader(tNewStream);
// 创建Xml数据
XmlDocument tXmlDoc = new XmlDocument();
XmlElement tRootElement = tXmlDoc.CreateElement("Res");
// 收集所有数据
RootNode.Sort();
for (int i = 0; i < RootNode.NodeList.Count; i++)
{
RootNode.NodeList[i].WriteToStream(tNewStream, tRootElement);
}
// 写入Xml
tXmlDoc.AppendChild(tRootElement);
// 写入内存流
MemoryStream tXmlMemStream = new MemoryStream();
XmlWriterSettings tXmlSetting = new XmlWriterSettings();
tXmlSetting.Encoding = Encoding.Unicode; // 设置格式
tXmlSetting.OmitXmlDeclaration = true; // 关闭声明头
XmlWriter tXmlWriter = XmlWriter.Create(tXmlMemStream, tXmlSetting);
tXmlDoc.Save(tXmlWriter);
// 记录当前位置
m_IndexOffset = (uint)tNewStream.Position;
// 写出Xml原始长度
BinaryWriter tWriter = new BinaryWriter(tNewStream);
tWriter.Write((uint)tXmlMemStream.Length);
// 压缩数据并保存到流
tXmlMemStream.Seek(0, SeekOrigin.Begin);
FCYResPackageHelper.DeflateEncodeTo(tXmlMemStream, tNewStream, (int)tXmlMemStream.Length);
// 重写文件头
writeDataHeader(tNewStream);
// 关闭Xml内存
tXmlWriter.Close();
// 关闭原始流
if (BaseStream != null)
{
BaseStream.Close();
}
if (m_BaseStream != null)
{
m_BaseStream.Close();
m_BaseStream = null;
}
m_BaseStream = tNewStream;
GC.Collect();
if (tOrgFile != null)
{
File.Delete(tOrgFile);
Save(tOrgFile);
File.Delete(FilePath);
}
}
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);
}
