static void ReadMulticastFooter( int streamVersion, CKBinaryReader r, StreamLogType t, out Guid mId, out int depth, out LogEntryType prevType, out DateTimeStamp prevTime )
{
Debug.Assert( Guid.Empty.ToByteArray().Length == 16 );
mId = new Guid( r.ReadBytes( 16 ) );
depth = streamVersion < 6 ? r.ReadInt32() : r.ReadNonNegativeSmallInt32();
if( depth < 0 ) throw new InvalidDataException();
prevType = LogEntryType.None;
prevTime = DateTimeStamp.Unknown;
if( (t & StreamLogType.IsPreviousKnown) != 0 )
{
prevTime = new DateTimeStamp( DateTime.FromBinary( r.ReadInt64() ), (t & StreamLogType.IsPreviousKnownHasUniquifier) != 0 ? r.ReadByte() : (Byte)0 );
prevType = (LogEntryType)r.ReadByte();
}
}
static ILogEntry ReadGroupClosed( int streamVersion, CKBinaryReader r, StreamLogType t, LogLevel logLevel )
{
DateTimeStamp time = new DateTimeStamp( DateTime.FromBinary( r.ReadInt64() ), (t & StreamLogType.HasUniquifier) != 0 ? r.ReadByte() : (Byte)0 );
ActivityLogGroupConclusion[] conclusions = Util.Array.Empty<ActivityLogGroupConclusion>();
if( (t & StreamLogType.HasConclusions) != 0 )
{
int conclusionsCount = streamVersion < 6 ? r.ReadInt32() : r.ReadNonNegativeSmallInt32();
conclusions = new ActivityLogGroupConclusion[conclusionsCount];
for( int i = 0; i < conclusionsCount; i++ )
{
CKTrait cTags = ActivityMonitor.Tags.Register( r.ReadString() );
string cText = r.ReadString();
conclusions[i] = new ActivityLogGroupConclusion( cText, cTags );
}
}
if( (t & StreamLogType.IsMultiCast) == 0 )
{
return new LECloseGroup( time, logLevel, conclusions );
}
Guid mId;
int depth;
LogEntryType prevType;
DateTimeStamp prevTime;
ReadMulticastFooter( streamVersion, r, t, out mId, out depth, out prevType, out prevTime );
return new LEMCCloseGroup( mId, depth, prevTime, prevType, time, logLevel, conclusions );
}
/// <summary>
/// Reads a <see cref="ILogEntry"/> from the binary reader that can be a <see cref="IMulticastLogEntry"/>.
/// If the first read byte is 0, read stops and null is returned.
/// The 0 byte is the "end marker" that <see cref="CKMonWriterClient.Close()"/> write, but this
/// method can read non zero-terminated streams (it catches an EndOfStreamException when reading the first byte and handles it silently).
/// This method can throw any type of exception (<see cref="System.IO.EndOfStreamException"/> or <see cref="InvalidDataException"/> for instance) that
/// must be handled by the caller.
/// </summary>
/// <param name="r">The binary reader.</param>
/// <param name="streamVersion">The version of the stream.</param>
/// <param name="badEndOfFile">True whenever the end of file is the result of an <see cref="EndOfStreamException"/>.</param>
/// <returns>The log entry or null if a zero byte (end marker) has been found.</returns>
static public ILogEntry Read( CKBinaryReader r, int streamVersion, out bool badEndOfFile )
{
if( r == null ) throw new ArgumentNullException( "r" );
badEndOfFile = false;
StreamLogType t = StreamLogType.EndOfStream;
LogLevel logLevel = LogLevel.None;
try
{
ReadLogTypeAndLevel( r, out t, out logLevel );
}
catch( EndOfStreamException )
{
badEndOfFile = true;
// Silently ignores here reading beyond the stream: this
// kindly handles the lack of terminating 0 byte.
}
if( t == StreamLogType.EndOfStream ) return null;
if( (t & StreamLogType.TypeMask) == StreamLogType.TypeGroupClosed )
{
return ReadGroupClosed( streamVersion, r, t, logLevel );
}
DateTimeStamp time = new DateTimeStamp( DateTime.FromBinary( r.ReadInt64() ), (t & StreamLogType.HasUniquifier) != 0 ? r.ReadByte() : (Byte)0 );
if( time.TimeUtc.Year < 2014 || time.TimeUtc.Year > 3000 ) throw new InvalidDataException( "Date year before 2014 or after 3000 are considered invalid." );
CKTrait tags = ActivityMonitor.Tags.Empty;
string fileName = null;
int lineNumber = 0;
CKExceptionData ex = null;
string text = null;
if( (t & StreamLogType.HasTags) != 0 ) tags = ActivityMonitor.Tags.Register( r.ReadString() );
if( (t & StreamLogType.HasFileName) != 0 )
{
fileName = r.ReadString();
lineNumber = streamVersion < 6 ? r.ReadInt32() : r.ReadNonNegativeSmallInt32();
if( lineNumber > 100*1000 ) throw new InvalidDataException( "LineNumber greater than 100K is considered invalid." );
}
if( (t & StreamLogType.HasException) != 0 )
{
ex = new CKExceptionData( r, (t & StreamLogType.IsLFOnly) == 0 );
if( (t & StreamLogType.IsTextTheExceptionMessage) != 0 ) text = ex.Message;
}
if( text == null ) text = r.ReadString( (t & StreamLogType.IsLFOnly) == 0 );
Guid mId;
int depth;
LogEntryType prevType;
DateTimeStamp prevTime;
if( (t & StreamLogType.TypeMask) == StreamLogType.TypeLine )
{
if( (t & StreamLogType.IsMultiCast) == 0 )
{
return new LELog( text, time, fileName, lineNumber, logLevel, tags, ex );
}
ReadMulticastFooter( streamVersion, r, t, out mId, out depth, out prevType, out prevTime );
return new LEMCLog( mId, depth, prevTime, prevType, text, time, fileName, lineNumber, logLevel, tags, ex );
}
if( (t & StreamLogType.TypeMask) != StreamLogType.TypeOpenGroup ) throw new InvalidDataException();
if( (t & StreamLogType.IsMultiCast) == 0 )
{
return new LEOpenGroup( text, time, fileName, lineNumber, logLevel, tags, ex );
}
ReadMulticastFooter( streamVersion, r, t, out mId, out depth, out prevType, out prevTime );
return new LEMCOpenGroup( mId, depth, prevTime, prevType, text, time, fileName, lineNumber, logLevel, tags, ex );
}