public IFileChunkReference ReadFileChunkReference(StpFormat stpFormat, CbFormat cbFormat, string context)
{
if (stpFormat == StpFormat.Uncompressed8Bytes && cbFormat == CbFormat.Uncompressed4Bytes)
{
var fileChunkReference64x32 = new FileChunkReference64x32();
ReadFileChunkReference64x32(ref fileChunkReference64x32, context);
return(fileChunkReference64x32);
}
if (stpFormat == StpFormat.Uncompressed4Bytes && cbFormat == CbFormat.Uncompressed4Bytes)
{
var fileChunkReference32 = new FileChunkReference32();
ReadFileChunkReference32(ref fileChunkReference32, context);
return(fileChunkReference32);
}
if (stpFormat == StpFormat.Compressed2Bytes && cbFormat == CbFormat.Compressed1Byte)
{
var fileChunkReference16x8 = new FileChunkReference16x8();
ReadFileChunkReference16x8(ref fileChunkReference16x8, context);
return(fileChunkReference16x8);
}
throw new NotImplementedException("Reference format is not supported");
}
public void ReadFileChunkReference64x32(ref FileChunkReference64x32 fileChunkReference64x32, string context)
{
if (!Unsafe.ReadStruct(binaryReader, ref fileChunkReference64x32))
{
throw new FileFormatException("Cannot read ReadFileChunkReference32. Context: " + context);
}
}
public void ReadTransactionLog(Dictionary <uint, uint> transactionsData, IFileChunkReference fileChunkReference,
uint cTransactionsInLog)
{
oneNoteFileReader.Move(fileChunkReference.Offset, "TransactionLog");
uint cbRead = 0;
var cbTransactionLogFragmentSize = fileChunkReference.DataSize;
var cbMax = cbTransactionLogFragmentSize - FileChunkReference64x32.SizeInBytes;
for (var i = 0; i < cTransactionsInLog; i++)
{
if (cbRead == cbMax)
{
const string operationContext = "TransactionLog.nextFragment";
var nextFragment = new FileChunkReference64x32();
oneNoteFileReader.ReadFileChunkReference64x32(ref nextFragment, operationContext);
oneNoteFileReader.Move(nextFragment.Offset, operationContext);
cbRead = 0;
cbMax = nextFragment.cb - FileChunkReference64x32.SizeInBytes;
}
else if (cbRead > cbMax)
{
throw new FileFormatException("Transaction log is broken");
}
ReadTransaction(transactionsData, ref cbRead);
}
}
public ICollection <FNDBase> ReadFileNodeList(IFileChunkReference fileChunkReference, Dictionary <uint, uint> transactionsData, params uint[] fileNodeIds)
{
ICollection <FNDBase> result = new List <FNDBase>();
var nextFragment = new FileChunkReference64x32();
while (true)
{
ReadFileNodeListFragment(fileChunkReference, result, ref nextFragment, transactionsData, fileNodeIds);
if (FileChunkReference64x32.Nil.Equals(nextFragment))
{
break;
}
fileChunkReference = nextFragment;
}
return(result);
}
public void ReadFileNodeListFragment(IFileChunkReference fileChunkReference, ICollection <FNDBase> result, ref FileChunkReference64x32 nextFragment, Dictionary <uint, uint> transactionsData, params uint[] fileNodeIds)
{
oneNoteFileReader.Move(fileChunkReference.Offset, "FileNodeListFragment");
var jumpSizeToNextFragmentReference = GetJumpSizeToNextFragmentReference(fileChunkReference.DataSize);
var fileNodeListHeader = new FileNodeListHeader();
oneNoteFileReader.ReadFileNodeListHeader(ref fileNodeListHeader);
jumpSizeToNextFragmentReference -= FileNodeListHeader.SizeInBytes;
var fileNodeListId = fileNodeListHeader.FileNodeListID;
var nodesCount = transactionsData[fileNodeListId];
var fileNodeHeader = new FileNodeHeader();
while (true)
{
if (nodesCount == 0)
{
break;
}
oneNoteFileReader.ReadFileNodeHeader(ref fileNodeHeader);
jumpSizeToNextFragmentReference -= FileNodeHeader.SizeInBytes;
var fileNodeId = fileNodeHeader.FileNodeID;
if (fileNodeId == FileNodeIDs.ChunkTerminatorFND)
{
break;
}
var sizeOfData = fileNodeHeader.Size - FileNodeHeader.SizeInBytes;
var skip = true;
if (fileNodeIds.Length == 0 || Array.IndexOf(fileNodeIds, fileNodeId) >= 0)
{
var readFileNodeData = ReadFileNodeData(fileNodeHeader);
if (readFileNodeData == null)
{
readFileNodeData = new NotImplementedFND(fileNodeHeader);
}
else
{
skip = false;
}
result.Add(readFileNodeData);
jumpSizeToNextFragmentReference -= sizeOfData;
}
if (skip && sizeOfData != 0)
{
oneNoteFileReader.Skip(sizeOfData);
jumpSizeToNextFragmentReference -= sizeOfData;
}
nodesCount--;
const uint minJumpSize = 4;
if (jumpSizeToNextFragmentReference < minJumpSize)
{
break;
}
}
if (jumpSizeToNextFragmentReference != 0)
{
oneNoteFileReader.Skip(jumpSizeToNextFragmentReference);
}
oneNoteFileReader.ReadFileChunkReference64x32(ref nextFragment, "FileNodeListFragment.nextFragment");
oneNoteFileReader.ExpectFileNodeListFooter();
transactionsData[fileNodeListId] = nodesCount;
}