private void Parse(PstFileReader reader, ulong offset, IndexTree tree)
{
// PRGX: make sure offset is valid
if (offset > (ulong)reader.BaseStream.Length)
{
throw new DataStructureException("Parse - offset beyond length of stream");
}
reader.BaseStream.Position = (long)offset;
if (!reader.PstFile.Is64Bit)
{
//32bit
byte[] itemsBuffer = reader.ReadBytes(496);
this.itemCount = reader.ReadByte();
this.maximumItemCount = reader.ReadByte();
this.itemSize = reader.ReadByte();
this.level = reader.ReadByte();
this.type = reader.ReadUInt16();
this.backPointer = reader.ReadUInt32();
this.crc = reader.ReadUInt32();
if (type == 0x8080 && level > 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[12];
System.Array.Copy(itemsBuffer, i * 12, itemBuffer, 0, 12);
DataStructureIndexNodeItem item = new DataStructureIndexNodeItem();
item.Id = BitConverter.ToUInt32(itemBuffer, 0);
item.BackPointer = BitConverter.ToUInt32(itemBuffer, 4);
item.Offset = BitConverter.ToUInt32(itemBuffer, 8);
items.Add(item);
IndexNode childIndexNode = new IndexNode(reader, item.Offset, tree);
childIndexNode.Parent = this;
this.children.Add(childIndexNode);
}
}
else if (type == 0x8080 && level == 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[12];
System.Array.Copy(itemsBuffer, i * 12, itemBuffer, 0, 12);
DataStructure item = new DataStructure(itemBuffer);
item.Id = BitConverter.ToUInt32(itemBuffer, 0);
item.Offset = BitConverter.ToUInt32(itemBuffer, 4);
item.Size = BitConverter.ToUInt16(itemBuffer, 8);
item.Flag = BitConverter.ToUInt16(itemBuffer, 10);
items.Add(item);
tree.Nodes.Add(item.Id, item);
}
}
else if (type == 0x8181 && level > 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[12];
System.Array.Copy(itemsBuffer, i * 12, itemBuffer, 0, 12);
ItemDescriptorIndexNodeItem item = new ItemDescriptorIndexNodeItem();
item.Id = BitConverter.ToUInt32(itemBuffer, 0);
item.BackPointer = BitConverter.ToUInt32(itemBuffer, 4);
item.Offset = BitConverter.ToUInt32(itemBuffer, 8);
items.Add(item);
IndexNode childIndexNode = new IndexNode(reader, item.Offset, tree);
childIndexNode.Parent = this;
this.children.Add(childIndexNode);
}
}
else if (type == 0x8181 && level == 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[16];
System.Array.Copy(itemsBuffer, i * 16, itemBuffer, 0, 16);
ItemDescriptor item = new ItemDescriptor();
item.Id = BitConverter.ToUInt32(itemBuffer, 0);
item.TableId = BitConverter.ToUInt32(itemBuffer, 4);
item.LocalDescriptorListId = BitConverter.ToUInt32(itemBuffer, 8);
item.ParentItemDescriptorId = BitConverter.ToUInt32(itemBuffer, 12);
items.Add(item);
tree.Nodes.Add(item.Id, item);
//root folder is parent to self.
if (item.Id == 290)
{
item.ParentItemDescriptorId = 0;
}
}
}
else
{
throw new ApplicationException("Unknown IndexNode type!");
}
}
else
{
//64bit
byte[] itemsBuffer = reader.ReadBytes(488);
this.itemCount = reader.ReadByte();
this.maximumItemCount = reader.ReadByte();
this.itemSize = reader.ReadByte();
this.level = reader.ReadByte();
uint emptyValue = reader.ReadUInt32();
this.type = reader.ReadUInt16();
ushort unknow1 = reader.ReadUInt16();
this.crc = reader.ReadUInt32();
this.backPointer = reader.ReadUInt64();
if (type == 0x8080 && level > 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[24];
System.Array.Copy(itemsBuffer, i * 24, itemBuffer, 0, 24);
DataStructureIndexNodeItem item = new DataStructureIndexNodeItem();
item.Id = BitConverter.ToUInt64(itemBuffer, 0);
item.BackPointer = BitConverter.ToUInt64(itemBuffer, 8);
item.Offset = BitConverter.ToUInt64(itemBuffer, 16);
// PRGX: offset from start of file is only valid when greater than zero
if (item.Offset > 0 && item.Offset < (ulong)reader.BaseStream.Length)
{
items.Add(item);
IndexNode childIndexNode = new IndexNode(reader, item.Offset, tree);
childIndexNode.Parent = this;
this.children.Add(childIndexNode);
}
}
}
else if (type == 0x8080 && level == 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[24];
System.Array.Copy(itemsBuffer, i * 24, itemBuffer, 0, 24);
DataStructure item = new DataStructure(itemBuffer);
item.Id = BitConverter.ToUInt64(itemBuffer, 0);
item.Offset = BitConverter.ToUInt64(itemBuffer, 8);
item.Size = BitConverter.ToUInt16(itemBuffer, 16);
item.Flag = BitConverter.ToUInt16(itemBuffer, 18);
// PRGX: offset from start of file is only valid when greater than zero
if (item.Offset > 0 && !tree.Nodes.ContainsKey(item.Id))
{
items.Add(item);
tree.Nodes.Add(item.Id, item);
}
}
}
else if (type == 0x8181 && level > 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[24];
System.Array.Copy(itemsBuffer, i * 24, itemBuffer, 0, 24);
ItemDescriptorIndexNodeItem item = new ItemDescriptorIndexNodeItem();
item.Id = BitConverter.ToUInt64(itemBuffer, 0);
item.BackPointer = BitConverter.ToUInt64(itemBuffer, 8);
item.Offset = BitConverter.ToUInt64(itemBuffer, 16);
// PRGX: offset from start of file is only valid when greater than zero
if (item.Offset > 0)
{
items.Add(item);
IndexNode childIndexNode = new IndexNode(reader, item.Offset, tree);
childIndexNode.Parent = this;
this.children.Add(childIndexNode);
}
}
}
else if ((type == 0x8181 || type == 0x0) && level == 0)
{
for (int i = 0; i < itemCount; i++)
{
byte[] itemBuffer = new byte[32];
System.Array.Copy(itemsBuffer, i * 32, itemBuffer, 0, 32);
ItemDescriptor item = new ItemDescriptor();
item.Id = BitConverter.ToUInt64(itemBuffer, 0);
item.TableId = BitConverter.ToUInt64(itemBuffer, 8);
item.LocalDescriptorListId = BitConverter.ToUInt64(itemBuffer, 16);
item.ParentItemDescriptorId = BitConverter.ToUInt32(itemBuffer, 24);
if (item.Id > 0 && !tree.Nodes.ContainsKey(item.Id))
{
items.Add(item);
tree.Nodes.Add(item.Id, item);
//root folder is parent to self.
if (item.Id == 290)
{
item.ParentItemDescriptorId = 0;
}
}
}
}
else
{
throw new ApplicationException("Unknown IndexNode type: " + type + " level: " + level);
}
}
}