internal static SupportedFileFormat DetectFileSchema(string filePath)
{
if (!string.IsNullOrEmpty(filePath))
{
if (filePath.EndsWith(SR.GetString("MainFrm_FileEtl"), StringComparison.OrdinalIgnoreCase))
{
return(SupportedFileFormat.EtlBinary);
}
if (filePath.EndsWith(SR.GetString("PJ_Extension"), StringComparison.OrdinalIgnoreCase))
{
return(SupportedFileFormat.STVProjectFile);
}
FileStream fileStream = null;
char[] array = new char[8192];
try
{
fileStream = Utilities.CreateFileStreamHelper(filePath);
Utilities.SeekFileStreamHelper(fileStream, 0L, SeekOrigin.Begin);
Utilities.CreateStreamReaderHelper(fileStream).Read(array, 0, array.Length);
}
catch (IOException)
{
return(SupportedFileFormat.UnknownFormat);
}
finally
{
Utilities.CloseStreamWithoutException(fileStream, isFlushStream: false);
}
string text = new string(array);
text = text.Trim(' ', '\0', '\t', '\n');
if (string.IsNullOrEmpty(text))
{
return(SupportedFileFormat.E2ETraceEventSchema);
}
int num = text.IndexOf(crimsonSchemaTag, StringComparison.Ordinal);
int num2 = text.IndexOf(e2eSchemaTag, StringComparison.Ordinal);
if (num != -1 && num2 == -1)
{
return(SupportedFileFormat.CrimsonSchema);
}
if (num == -1 && num2 != -1)
{
return(SupportedFileFormat.E2ETraceEventSchema);
}
if (num != -1 && num2 == -1 && num < num2)
{
return(SupportedFileFormat.CrimsonSchema);
}
if (num != -1 && num2 == -1 && num > num2)
{
return(SupportedFileFormat.E2ETraceEventSchema);
}
}
return(SupportedFileFormat.NotSupported);
}
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);
}
