/**
* <summary>Get a list of Tags from a stream. This is meant for internal use only.</summary>
* <param name="stream">The stream to read from. (Position is expected to be at 0).</param>
* <returns>The list of tags.</returns>
*/
public static List <T> GetListData <T>(Stream stream) where T : ITag
{
BigBinaryReader binReader = new BigBinaryReader(stream);
TagBuilder currentBuilder = new TagBuilder();
binReader.BaseStream.Seek(0, SeekOrigin.Begin);
List <T> output = new List <T>();
while (binReader.BaseStream.Position != binReader.BaseStream.Length)
{
currentBuilder.setDataType(binReader.ReadByte());
currentBuilder.setDataSize(binReader.ReadInt32());
//TODO see if this is correct.
currentBuilder.setStartingIndex(binReader.BaseStream.Position);
currentBuilder.setNameSize(binReader.ReadInt16());
byte[] nameBytes = binReader.ReadBytes(currentBuilder.getNameSize());
String tagName = Encoding.UTF8.GetString(nameBytes);
currentBuilder.setName(tagName);
byte[] value = binReader.ReadBytes((int)(currentBuilder.getStartingIndex() - stream.Position) + (int)currentBuilder.getDataSize());
currentBuilder.setValueBytes(value);
output.Add((T)currentBuilder.proccess());
}
return(output);
}
/**
* <summary>
* This object goes through the data and scouts out the information from the given key.
* This method is recursive, which is why the parameter offset exists.
* </summary>
*
* <param name="data">The input array of bytes</param>
* <param name="key">The key</param>
* <param name="counter">The Scout object</param>
* <param name="startIndex">The starting index for the count.</param>
* <returns>The key scout.</returns>
*/
public static KeyScout ScoutObjectData(byte[] data, string key, KeyScout counter, int startIndex)
{
MemoryStream stream = new MemoryStream(data);
BigBinaryReader binReader = new BigBinaryReader(stream);
TagBuilder currentBuilder = new TagBuilder();
binReader.BaseStream.Seek(0, SeekOrigin.Begin);
string name = key.Split('.')[0];
string otherKey = getKey(key.Split('.'));
while (binReader.BaseStream.Position != binReader.BaseStream.Length)
{
KeyScoutChild child = new KeyScoutChild();
currentBuilder.setDataType(binReader.ReadByte());
child.SetStartingIndex((int)binReader.BaseStream.Position + startIndex);
currentBuilder.setDataSize(binReader.ReadInt32());
currentBuilder.setStartingIndex(binReader.BaseStream.Position);
currentBuilder.setNameSize(binReader.ReadInt16());
if (currentBuilder.getNameSize() != Encoding.UTF8.GetByteCount(name))
{
binReader.BaseStream.Seek((currentBuilder.getStartingIndex() - stream.Position) + currentBuilder.getDataSize(), SeekOrigin.Current);
currentBuilder = new TagBuilder();
continue;
}
byte[] nameBytes = binReader.ReadBytes(currentBuilder.getNameSize());
string tagName = Encoding.UTF8.GetString(nameBytes);
currentBuilder.setName(tagName);
if (tagName != name)
{
binReader.BaseStream.Seek((currentBuilder.getStartingIndex() - stream.Position) + currentBuilder.getDataSize(), SeekOrigin.Current);
currentBuilder = new TagBuilder();
continue;
}
int binPos = (int)binReader.BaseStream.Position;
byte[] value = binReader.ReadBytes((int)(currentBuilder.getStartingIndex() - stream.Position) + (int)currentBuilder.getDataSize());
currentBuilder.setValueBytes(value);
binReader.Close();
if (otherKey != null)
{
validateNotCompressed(currentBuilder);
child.SetSize(currentBuilder.getDataSize());
child.SetName(currentBuilder.getName());
counter.AddChild(child);
return(ScoutObjectData(currentBuilder.getValueBytes(), otherKey, counter, binPos + startIndex));
}
child.SetSize(currentBuilder.getDataSize());
child.SetName(currentBuilder.getName());
counter.SetEnd(child);
return(counter);
}
return(null);
}
/**
* <summary>Checks to see if a key exists within a stream.</summary>
* <param name="stream">The stream to check in.</param>
* <param name="key">The key to find.</param>
*
* <returns>If the key exists.</returns>
*/
public static bool FindSubObjectData(Stream stream, string key)
{
BigBinaryReader binReader = new BigBinaryReader(stream);
TagBuilder currentBuilder = new TagBuilder();
string name = key.Split('.')[0];
string otherKey = getKey(key.Split('.'));
while (binReader.BaseStream.Position != binReader.BaseStream.Length)
{
currentBuilder.setDataType(binReader.ReadByte());
currentBuilder.setDataSize(binReader.ReadInt32());
//TODO see if this is correct.
currentBuilder.setStartingIndex(binReader.BaseStream.Position);
currentBuilder.setNameSize(binReader.ReadInt16());
if (currentBuilder.getNameSize() != Encoding.UTF8.GetByteCount(name))
{
binReader.BaseStream.Seek((currentBuilder.getStartingIndex() - stream.Position) + currentBuilder.getDataSize(), SeekOrigin.Current);
currentBuilder = new TagBuilder();
continue;
}
byte[] nameBytes = binReader.ReadBytes(currentBuilder.getNameSize());
string tagName = Encoding.UTF8.GetString(nameBytes);
currentBuilder.setName(tagName);
if (tagName != name)
{
binReader.BaseStream.Seek((currentBuilder.getStartingIndex() - stream.Position) + currentBuilder.getDataSize(), SeekOrigin.Current);
currentBuilder = new TagBuilder();
continue;
}
if (otherKey != null)
{
validateNotCompressed(currentBuilder);
return(FindSubObjectData(stream, otherKey));
}
byte[] value = binReader.ReadBytes((int)(currentBuilder.getStartingIndex() - stream.Position) + (int)currentBuilder.getDataSize());
currentBuilder.setValueBytes(value);
return(true);
}
return(false);
}
public static ITag getSubData(Stream stream, string name)
{
BigBinaryReader binReader = new BigBinaryReader(stream);
TagBuilder currentBuilder = new TagBuilder();
while (binReader.BaseStream.Position != binReader.BaseStream.Length)
{
currentBuilder.setDataType(binReader.ReadByte());
currentBuilder.setDataSize(binReader.ReadInt32());
//TODO see if this is correct.
currentBuilder.setStartingIndex(binReader.BaseStream.Position);
currentBuilder.setNameSize(binReader.ReadInt16());
if (currentBuilder.getNameSize() != Encoding.UTF8.GetByteCount(name))
{
binReader.BaseStream.Seek((currentBuilder.getStartingIndex() - stream.Position) + currentBuilder.getDataSize(), SeekOrigin.Current);
currentBuilder = new TagBuilder();
continue;
}
byte[] nameBytes = binReader.ReadBytes(currentBuilder.getNameSize());
String tagName = Encoding.UTF8.GetString(nameBytes);
currentBuilder.setName(tagName);
if (tagName != name)
{
binReader.BaseStream.Seek((currentBuilder.getStartingIndex() - stream.Position) + currentBuilder.getDataSize(), SeekOrigin.Current);
currentBuilder = new TagBuilder();
continue;
}
byte[] value = binReader.ReadBytes((int)(currentBuilder.getStartingIndex() - stream.Position) + (int)currentBuilder.getDataSize());
currentBuilder.setValueBytes(value);
return(currentBuilder.proccess());
}
return(null);
}
/**
* <inheritdoc/>
*/
public Tag <List <ITag> > CreateFromData(byte[] value)
{
int length = value.Length;
ICompressor compressor;
byte[] bitData;
using (BigBinaryReader bbr = new BigBinaryReader(new MemoryStream(value)))
{
short compressorLength = bbr.ReadInt16();
length -= 2 + compressorLength;
byte[] compressorBytes = new byte[compressorLength];
bbr.Read(compressorBytes, 0, compressorLength);
string compressionName = Encoding.UTF8.GetString(compressorBytes);
compressor = ODSUtil.GetCompressor(compressionName);
if (compressor == null)
{
throw new ODSException("Cannot find compressor: " + compressionName);
}
bitData = bbr.ReadBytes((int)(bbr.BaseStream.Length - bbr.BaseStream.Position));
}
this.compressor = compressor;
byte[] decompressedData;
using (MemoryStream memStream = new MemoryStream())
{
using (Stream compressedStream = compressor.GetDecompressStream(new MemoryStream(bitData)))
{
compressedStream.CopyTo(memStream);
}
decompressedData = memStream.ToArray();
}
this.value = InternalUtils.GetListData <ITag>(decompressedData);
return(this);
}