internal TraceRecord GetFirstValidTrace(FileStream fs, long fileOffset, out long foundTraceFileOffset, out long potentialNextTraceOffset, TaskInfoBase task)
{
foundTraceFileOffset = -1L;
potentialNextTraceOffset = -1L;
if (fs == null || fileOffset < 0 || fileOffset > fileLength)
{
return(null);
}
Utilities.SeekFileStreamHelper(fs, fileOffset, SeekOrigin.Begin);
BinaryReader binaryReader = Utilities.CreateBinaryReaderHelper(fs);
long num = fileOffset;
while (true)
{
byte[] bytes = Utilities.ReadBytesHelper(binaryReader, 2046);
int num2 = 0;
int num3 = Utilities.ByteArrayIndexOf(bytes, findingBytes, num2);
while (num3 != -1)
{
num = fileOffset + num3;
Utilities.SeekFileStreamHelper(fs, num, SeekOrigin.Begin);
XmlTextReader xmlTextReader = new XmlTextReader(fs, XmlNodeType.Element, null);
xmlTextReader.WhitespaceHandling = WhitespaceHandling.None;
try
{
if (xmlTextReader.Read() && xmlTextReader.Name == "E2ETraceEvent")
{
TraceRecord traceRecord = new TraceRecord(dataSource);
traceRecord.ReadFrom(xmlTextReader, xmlUtil);
foundTraceFileOffset = num;
potentialNextTraceOffset = foundTraceFileOffset + findingBytes.Length;
int typePositionPriority = 1024;
traceRecord.TraceRecordPos = new TraceRecordPosition(this, foundTraceFileOffset, traceRecord.Time, typePositionPriority);
traceRecord.TraceID = foundTraceFileOffset + filePath.GetHashCode();
return(traceRecord);
}
if (fs.Position >= FileSize)
{
return(null);
}
}
catch (XmlException ex)
{
task?.SaveException(new E2EInvalidFileException(ex.Message, fs.Name, ex, num));
}
catch (E2EInvalidFileException ex2)
{
task?.SaveException(new E2EInvalidFileException(ex2.Message, fs.Name, ex2, num));
}
finally
{
num2 += num3 + findingBytes.Length;
num3 = Utilities.ByteArrayIndexOf(bytes, findingBytes, num2);
}
}
if (fs.Position >= FileSize)
{
break;
}
fileOffset += 2046 - findingBytes.Length - 2;
Utilities.SeekFileStreamHelper(fs, fileOffset, SeekOrigin.Begin);
}
return(null);
}