void InitializeBlocks()
{
uint fileOffset = 0;
bool hasEnded = false;
List <Block> result = new List <Block> ();
ulong counter = 0;
byte [] header = new byte [BlockData.BLOCK_HEADER_SIZE];
ProfilerEventHandler eventProcessor = new ProfilerEventHandler();
while (!hasEnded)
{
int bytesRead = stream.Read(header, 0, BlockData.BLOCK_HEADER_SIZE);
if (bytesRead != BlockData.BLOCK_HEADER_SIZE)
{
if (bytesRead == 0)
{
Console.WriteLine("WARNING: File truncated at offset {0} without end block", fileOffset);
break;
}
else
{
throw new Exception(String.Format("At file offset {0} block header is not complete", fileOffset));
}
}
fileOffset += (uint)BlockData.BLOCK_HEADER_SIZE;
counter += BlockData.DecodeHeaderBlockCounterDelta(header);
Block block = new Block(fileOffset, BlockData.DecodeHeaderBlockCode(header), (uint)BlockData.DecodeHeaderBlockLength(header), counter);
result.Add(block);
fileOffset += block.Length;
stream.Seek(fileOffset, SeekOrigin.Begin);
if (block.Code == BlockCode.INTRO)
{
ReadBlock(block).Decode(eventProcessor);
startCounter = eventProcessor.StartCounter;
startTime = eventProcessor.StartTime;
}
if (block.Code == BlockCode.END)
{
hasEnded = true;
ReadBlock(block).Decode(eventProcessor);
endCounter = eventProcessor.EndCounter;
endTime = eventProcessor.EndTime;
}
}
blocks = result.ToArray();
foreach (Block block in blocks)
{
block.TimeFromStart = eventProcessor.ClicksToTimeSpan(block.Counter);
}
}
public BlockData ReadBlock()
{
if (!hasEnded)
{
byte [] header;
byte [] block;
BlockCode code;
int length;
int bytesRead;
BlockData result = null;
header = new byte [BlockData.BLOCK_HEADER_SIZE];
bytesRead = stream.Read(header, 0, BlockData.BLOCK_HEADER_SIZE);
if (bytesRead == 0)
{
return(null);
}
else if (bytesRead < BlockData.BLOCK_HEADER_SIZE)
{
throw new DecodingException(result, 0, String.Format("Invalid header: length is {0} instead of {1}", bytesRead, BlockData.BLOCK_HEADER_SIZE));
}
fileOffset += (uint)BlockData.BLOCK_HEADER_SIZE;
code = BlockData.DecodeHeaderBlockCode(header);
length = BlockData.DecodeHeaderBlockLength(header);
if (code == BlockCode.END)
{
hasEnded = true;
}
counter += BlockData.DecodeHeaderBlockCounterDelta(header);
block = NewData(length);
stream.Read(block, 0, length);
result = new BlockData(fileOffset, code, length, counter, block);
fileOffset += (uint)length;
return(result);
}
else
{
return(null);
}
}
