static internal V8DataElement Create(V8ItemHandle handle)
{
using (var DataStream = handle.Container.GetDataStream(handle))
{
byte[] data = new byte[DataStream.Length];
DataStream.Read(data, 0, data.Length);
DataStream.Position = 0;
if (DataStream.Length >= sizeof(UInt32))
{
byte[] signature = new byte[] { 0xff, 0xff, 0xff, 0x7f };
//var strReader = new BinaryReader(DataStream);
//UInt32 signature = strReader.ReadUInt32();
if (ArrayStartsWith(data, signature))
{
// Это правильный заголовок блока, значит, данные - несжатый cf-файл.
return(new V8ContainerElement(handle, data));
}
else
{
// Это сырые данные
return(new V8DataElement(handle, data));
}
}
else
{
// Это сырые данные
return(new V8DataElement(handle));
}
}
}
internal override Stream GetDataStream(V8ItemHandle Handle)
{
MemoryStream resultStream = new MemoryStream();
using (var ReadStream = base.GetDataStream(Handle))
{
using (var DeflateStream = new System.IO.Compression.DeflateStream(ReadStream, System.IO.Compression.CompressionMode.Decompress))
{
DeflateStream.CopyTo(resultStream);
}
}
resultStream.Position = 0;
return(resultStream);
}
internal virtual Stream GetDataStream(V8ItemHandle Handle)
{
if (Handle.Container != this)
{
throw new ArgumentException("Handle does not belong to an image");
}
if (Handle.Length == 0)
{
return(new MemoryStream());
}
byte[] buffer = ReadChunkedBlock((int)Handle.Offset);
var ItemStream = new MemoryStream(buffer);
return(ItemStream);
}
private void FillDataItems()
{
m_ItemsMap = new Dictionary <string, V8ItemHandle>();
int startAddr = stFileHeader.Size;
stElemAddr[] toc = ReadTableOfContents(startAddr);
unsafe
{
for (int i = 0; i < toc.Length; i++)
{
var tocItem = toc[i];
stBlockHeader itemHdr = MemReadStruct <stBlockHeader>((int)tocItem.elem_header_addr);
if (!itemHdr.Check())
{
throw new V8WrongFileException();
}
int titleSize = (int)Helpers.FromHexStr((sbyte *)itemHdr.data_size_hex);
int titleDelta = (int)stBlockHeader.Size + stElemHeaderPrefix.Size;
int nameSize = titleSize - stElemHeaderPrefix.Size - 4;
byte[] arr = new byte[nameSize];
MemReadFrom((int)tocItem.elem_header_addr + titleDelta, nameSize, ref arr);
string itemName;
fixed(byte *ptr = arr)
{
itemName = new string((sbyte *)ptr, 0, (int)nameSize, Encoding.Unicode);
}
V8ItemHandle itemHandle = new V8ItemHandle();
itemHandle.Container = this;
itemHandle.Name = itemName;
if (tocItem.elem_data_addr != 0x7fffffff)
{
// длина тела данных
itemHdr = MemReadStruct <stBlockHeader>((int)tocItem.elem_data_addr);
if (!itemHdr.Check())
{
throw new V8WrongFileException();
}
uint BodySize = Helpers.FromHexStr((sbyte *)itemHdr.data_size_hex);
itemHandle.Offset = tocItem.elem_data_addr;
itemHandle.Length = BodySize;
}
else
{
itemHandle.Offset = 0;
itemHandle.Length = 0;
}
m_ItemsMap.Add(itemName, itemHandle);
}
}
}
internal V8ContainerElement(V8ItemHandle handle, byte[] data) : base(handle, data)
{
m_ParentContainer = handle.Container;
m_FoldedImage = new V8Image(m_ParentContainer.GetDataStream(handle));
}
internal V8ContainerElement(V8ItemHandle handle) : this(handle, null)
{
}
internal V8DataElement(V8ItemHandle handle, byte[] data)
{
m_handle = handle;
m_data = data;
}
internal V8DataElement(V8ItemHandle handle) : this(handle, null)
{
}