private Maybe <BinaryData> GetHNIDBinaryData(NID[] nodePath, HNID hnid)
{
if (hnid.IsHID)
{
if (hnid.HID.Index == 0)
{
return(Maybe <BinaryData> .NoValue());
}
var heapItem = heapOnNodeReader.GetHeapItem(nodePath, hnid.HID);
return(Maybe <BinaryData> .OfValue(heapItem));
}
if (hnid.IsNID)
{
var subnodePath = new List <NID>(nodePath)
{
hnid.NID
};
var generator = BinaryDataGenerator.New();
foreach (var block in dataTreeReader.Read(subnodePath.ToArray(), Maybe <int> .NoValue()))
{
generator.Append(block);
}
return(generator.GetData());
}
return(Maybe <BinaryData> .NoValue());
}
public BinaryData Encode(HNPAGEHDR value)
{
return
(BinaryDataGenerator
.New()
.Append((short)value.PageMapOffset)
.GetData());
}
public BinaryData Encode(HNBITMAPHDR value)
{
return
(BinaryDataGenerator
.New()
.Append((short)value.PageMapOffset)
.Append(value.FillLevel)
.GetData());
}
private BinaryData Encode(BinaryData data, PageTrailer pageTrailer)
{
var dataGenerator = BinaryDataGenerator.New();
dataGenerator.Append(data);
dataGenerator.Append(pageTrailer, pageTrailerEncoder);
return(dataGenerator.GetData());
}
public BinaryData Encode(ExternalDataBlock value)
{
return
(BinaryDataGenerator.New()
.Append(value.Data)
.Append(value.Padding)
.Append(value.Trailer, blockTrailerEncoder)
.GetData());
}
public BinaryData Encode(HNPAGEMAP value)
{
return
(BinaryDataGenerator
.New()
.Append((short)value.AllocationCount)
.Append((short)value.FreeCount)
.Append(value.AllocationTable)
.GetData());
}
public BinaryData Encode(BREF value)
{
var generator = BinaryDataGenerator.New();
return
(generator
.Append(value.BlockId, bidEncoder)
.Append(value.ByteIndex, biEncoder)
.GetData());
}
public BinaryData Encode(IBBTEntry value)
{
var generator = BinaryDataGenerator.New();
return
(generator
.Append(value.Key, bidEncoder)
.Append(value.ChildPageBlockReference, brefEncoder)
.GetData());
}
public BinaryData Encode(BlockTrailer value)
{
return
(BinaryDataGenerator.New()
.Append((short)value.AmountOfData)
.Append((short)value.BlockSignature)
.Append(value.DataCrc)
.Append(value.BlockId, bidEncoder)
.GetData());
}
public BinaryData Encode(PageTrailer value)
{
return
(BinaryDataGenerator.New()
.Append((byte)value.PageType)
.Append((byte)value.PageTypeRepeat)
.Append((short)value.PageSignature)
.Append(value.Crc32ForPageData)
.Append(value.PageBlockId.Value)
.GetData());
}
public BinaryData Encode(LBBTEntry value)
{
var generator = BinaryDataGenerator.New();
return
(generator
.Append(value.BlockReference, brefEncoder)
.Append(value.ByteCountOfRawDataInReferencedBlockExcludingTrailerAndAlignmentPadding, int32Encoder)
.Append(value.NumberOfReferencesToThisBlock, int32Encoder)
.Append(value.Padding)
.GetData());
}
private BinaryData EncodeIndexBlock(Tuple <TKey, HID>[] blockItems)
{
var generator = BinaryDataGenerator.New();
foreach (var item in blockItems)
{
generator.Append(item.Item1, keyEncoder);
generator.Append(item.Item2, hidEncoder);
}
return(generator.GetData());
}
public BinaryData Encode(HNHDR value)
{
return
(BinaryDataGenerator
.New()
.Append((short)value.PageMapOffset)
.Append((byte)value.BlockSignature)
.Append((byte)value.ClientSignature)
.Append(value.UserRoot.Value)
.Append(value.FillLevel)
.GetData());
}
private BinaryData EncodeLeafBlock(Tuple <TKey, TValue>[] blockItems)
{
var generator = BinaryDataGenerator.New();
foreach (var item in blockItems)
{
generator.Append(item.Item1, keyEncoder);
generator.Append(item.Item2, valueEncoder);
}
return(generator.GetData());
}
private BinaryData EncodeSLBlock(SLEntry[] blockEntries)
{
var generator = BinaryDataGenerator.New();
generator.Append((byte)0x02);
generator.Append((byte)0x00);
generator.Append((short)blockEntries.Length);
generator.Append(BinaryData.OfSize(4));
Array.ForEach(blockEntries, e => generator = generator.Append(e, slEntryEncoder));
return(generator.GetData());
}
public BinaryData Encode(LNBTEntry value)
{
var generator = BinaryDataGenerator.New();
return
(generator
.Append(value.NodeId, nidEncoder)
.Append(value.DataBlockId, bidEncoder)
.Append(value.SubnodeBlockId, bidEncoder)
.Append(value.ParentNodeId, nidEncoder)
.Append(value.Padding)
.GetData());
}
public BinaryData Encode(BTPage value)
{
var generator = BinaryDataGenerator.New();
return
(generator
.Append(value.Entries)
.Append(value.Entries.Length, int32Encoder, 1)
.Append(value.MaximumNumberOfEntriesInPage, int32Encoder, 1)
.Append(value.EntrySize, int32Encoder, 1)
.Append(value.PageLevel, int32Encoder, 1)
.Append(value.PageTrailer, pageTrailerEncoder)
.GetData());
}
private BinaryData GetDataToCalculateCrc32(
BinaryData encodedExternalBlockIds,
int numberOfExternalBlockIds,
int totalNumberOfBytesInReferencedBlocks)
{
return
(BinaryDataGenerator.New()
.Append((byte)0x01)
.Append((byte)blockLevel)
.Append((short)numberOfExternalBlockIds)
.Append(totalNumberOfBytesInReferencedBlocks)
.Append(encodedExternalBlockIds)
.GetData());
}
public IB ExtendSingle()
{
var extensionOffset = IB.OfValue(dataStream.Length);
var numberOfAMapsSoFar = Convert.ToInt32(extensionOffset.Subtract(OffsetOfFirstAMap) / AMapExtensionSize);
var numberOfPMapsSoFar = Convert.ToInt32(extensionOffset.Add(0x512).Subtract(OffsetOfFirstPMap) / PMapExtensionSize);
var createPMap = extensionOffset.Add(0x512).Subtract(OffsetOfFirstPMap) % PMapExtensionSize == 0;
var createFMap = numberOfAMapsSoFar == 127 || numberOfAMapsSoFar == 495;
var createFPMap = numberOfPMapsSoFar == 127 * 8 || numberOfPMapsSoFar == 495 * 8;
var amap = CreateAMap(extensionOffset, createPMap, createFMap, createFPMap);
var dataGenerator = BinaryDataGenerator.New();
dataGenerator.Append(amap, amapEncoder);
if (createPMap)
{
dataGenerator.Append(CreatePMap(extensionOffset + 0x200), pmapEncoder);
}
if (createFMap)
{
dataGenerator.Append(CreateFMap(extensionOffset + 0x400), fmapEncoder);
}
if (createFPMap)
{
dataGenerator.Append(CreateFPMap(extensionOffset + 0x600), fpmapEncoder);
}
dataGenerator.FillTo(AMapExtensionSize);
dataGenerator.WriteTo(dataStream);
headerUsageProvider.Use(
header =>
header
.SetRoot(
header
.Root
.SetFileEOF(extensionOffset + AMapExtensionSize)
.SetLastAMapOffset(extensionOffset)
.SetFreeSpaceInAllAMaps(header.Root.AMapFree + AMapExtensionSize - GetDefaultAllocationsSize(createPMap, createFMap, createFPMap))));
return(extensionOffset);
}
private BinaryData CreateAllocationTable(
BinaryData[] items,
int sizeOfTheHeader)
{
var generator = BinaryDataGenerator.New();
var itemOffset = sizeOfTheHeader;
for (var i = 0; i < items.Length + 1; i++)
{
generator = generator.Append((short)itemOffset);
itemOffset = itemOffset + items[i].Length;
}
return(generator.GetData());
}
private Tuple <PropertyId, BinaryData> AllocatePropertyOnTheHN(
PropertyTag propertyTag,
PropertyValue propertyValue,
IHeapOnNodeGenerator hnGenerator)
{
var propertyValueInHN =
BinaryDataGenerator
.New()
.Append((short)propertyTag.Type.Value)
.Append(propertyValue.Value)
.GetData();
var hid = hnGenerator.AllocateItem(propertyValueInHN);
var hnid = new HNID(hid);
return(Tuple.Create(propertyTag.Id, hnidEncoder.Encode(hnid)));
}
public BinaryData Encode(Root value)
{
var generator = BinaryDataGenerator.New();
return
(generator
.Append(value.Reserved, int32Encoder)
.Append(value.FileEOF, int64Encoder)
.Append(value.AMapLast, int64Encoder)
.Append(value.AMapFree, int64Encoder)
.Append(value.PMapFree, int64Encoder)
.Append(value.NBTRootPage, brefEncoder)
.Append(value.BBTRootPage, brefEncoder)
.Append(value.AMapValid, int32Encoder, 1)
.Append(value.BReserved, int32Encoder, 1)
.Append(value.WReserved, int32Encoder, 2)
.GetData());
}
private BinaryData EncodeBlock(
ExternalDataBlockForHeapOnNode block,
BinaryData encodedHeader)
{
var pageMap =
new HNPAGEMAP(
block.NumberOfItems + 1,
0,
CreateAllocationTable(block.Items, block.HeaderSize));
return
(BinaryDataGenerator
.New()
.Append(encodedHeader)
.Append(block.Items)
.FillTo(block.RawByteCountWithoutPageMapWithPadding)
.Append(pageMap, pageMapEncoder)
.GetData());
}
