/// <summary>
/// 根据文件夹和文件名称，自动判断Mapper或者在Stream任意位置，总之读取到你想要的文件
/// 文件读取顺序，Mapper Persist,Mapper Stream,源文件 Persist,源文件 Stream
/// PS!本API没有做单文件边界判断，读取的时候需要通过FileInfo自行判断是否读多了，避免读出超过单文件的边界到下个文件，产生解析错误。
/// </summary>
public Stream GetFileStream(string fileName, out eFileMapperLoaderPosType pos)
{
pos = eFileMapperLoaderPosType.None;
var info = GetFileInfo(fileName);
if (info != null)
{
UnityFileLoaderHelper.eFileLoaderPosType filePos;
var bs = UnityFileLoaderHelper.ReadFileByStream(Dir, info.GetMappedFileName(), out filePos,
info.Offset);
if (filePos == UnityFileLoaderHelper.eFileLoaderPosType.PersistAsset)
{
pos = eFileMapperLoaderPosType.MapperAsset_PersistAsset;
}
if (filePos == UnityFileLoaderHelper.eFileLoaderPosType.StreamAsset)
{
pos = eFileMapperLoaderPosType.MapperAsset_StreamAsset;
}
return(bs);
}
else
{
UnityFileLoaderHelper.eFileLoaderPosType filePos;
var bs = UnityFileLoaderHelper.ReadFileByStream(Dir, fileName, out filePos);
if (filePos == UnityFileLoaderHelper.eFileLoaderPosType.PersistAsset)
{
pos = eFileMapperLoaderPosType.PersistAsset;
}
if (filePos == UnityFileLoaderHelper.eFileLoaderPosType.StreamAsset)
{
pos = eFileMapperLoaderPosType.StreamAsset;
}
return(bs);
}
}