private long ReadOffsets(string currentFileName)
{
long position;
if (streamSource.Exists(offsetsPath) == false)
{
return(0);
}
using (var offsets = streamSource.OpenRead(offsetsPath))
using (var reader = new BinaryReader(offsets))
{
var fileName = reader.ReadString();
if (fileName != currentFileName)
{
// wrong file, skipping
streamSource.DeleteOnClose(offsetsPath);
return(0);
}
position = reader.ReadInt64();
while (true)
{
string key;
try
{
key = reader.ReadString();
}
catch (EndOfStreamException)
{
break;
}
var pos = reader.ReadInt64();
var count = reader.ReadInt32();
idToPos[key] = new StreamInformation
{
LastPosition = pos,
StreamLength = count
};
}
}
return(position);
}
