/// <summary>
/// Read a group of stream tags (which all come in order) from the BBeB reader.
/// </summary>
/// <param name="tagReader">The reader to do the reading with</param>
/// <returns>A new tag representing the uncompressed data in the stream.</returns>
public static StreamTagGroup Deserialize(BBeBinaryReader tagReader, ObjectType eObjectType)
{
ushort wFlags = tagReader.ReadUInt16();
StreamFormatFlags eStreamFlags = (StreamFormatFlags)(wFlags & 0xff00);
StreamContents eContents = (StreamContents)(wFlags & 0x00ff);
TagId eTagId = tagReader.ReadTag();
if (eTagId != TagId.StreamSize)
{
throw new UnexpectedTagException("Expected a StreamSize tag: " + eTagId.ToString());
}
uint dwStreamSize = tagReader.ReadUInt32();
eTagId = tagReader.ReadTag();
if (eTagId != TagId.StreamStart)
{
throw new UnexpectedTagException("Expected a StreamStart tag: " + eTagId.ToString());
}
byte[] streamData = tagReader.ReadBytes((int)dwStreamSize);
try
{
eTagId = tagReader.ReadTag();
}
catch (InvalidTagException ex)
{
Debug.WriteLineIf(s_bDebugMode, "Not a tag at end of stream: 0x" + ex.Value.ToString("x"));
// dataTag.AppendShort(ex.Value);
// Temporarily
eTagId = TagId.StreamEnd;
}
if (eTagId != TagId.StreamEnd)
{
throw new UnexpectedTagException("Expected a StreamEnd tag: " + eTagId.ToString());
}
StreamTagGroup tag = new StreamTagGroup();
tag.Contents = eContents;
StreamTagSerializer streamTagSerializer = new StreamTagSerializer();
tag.Data = streamTagSerializer.Convert(streamData, eStreamFlags,
StreamFormatFlags.None, eObjectType);
return(tag);
}
/// <summary>
/// Write the tag serialized data using the supplied writer.
/// </summary>
/// <remarks>
/// This is a really KLUDGY routine. Even though it deals with primitive
/// types it has knowledge of what those types mean. For example the UInt16ArrayTag
/// doesn't have a length value written, but the UInt32ArrayTag does. This is
/// a very brittle solution to this problem and needs to be fixed. The solution is
/// to have a serialize method for each tag type (uggh) - so you see why I took
/// this shortcut.
/// </remarks>
/// <param name="tag"></param>
/// <param name="writer"></param>
private static void SerializeTag(BBeBTag tag, BBeBinaryWriter writer)
{
ushort id = (ushort)(0xf500 + tag.Id);
if (tag.GetType() == typeof(ByteTag))
{
ByteTag t = (ByteTag)tag;
writer.Write(id);
writer.Write(t.Value);
}
else if (tag.GetType() == typeof(StreamTagGroup))
{
StreamTagSerializer.Serialize(writer, (StreamTagGroup)tag);
}
else if (tag.GetType() == typeof(ByteArrayTag))
{
ByteArrayTag t = (ByteArrayTag)tag;
if (t.Id == TagId.StreamStart)
{
byte[] data = t.Value;
writer.Write(BBeBLib.TagId.StreamSize);
writer.Write((uint)data.Length);
writer.Write(id);
writer.Write(data);
writer.Write(BBeBLib.TagId.StreamEnd);
}
else
{
writer.Write(id);
writer.Write(t.Value);
}
}
else if (tag.GetType() == typeof(UInt16Tag))
{
UInt16Tag t = (UInt16Tag)tag;
writer.Write(id);
writer.Write(t.Value);
}
else if (tag.GetType() == typeof(UInt16ArrayTag))
{
UInt16ArrayTag t = (UInt16ArrayTag)tag;
writer.Write(id);
foreach (ushort val in t.Value)
{
writer.Write(val);
}
}
else if (tag.GetType() == typeof(UInt32Tag))
{
UInt32Tag t = (UInt32Tag)tag;
// StreamSize is written out by the StreamStart tag as the data may be compressed
if (t.Id != TagId.StreamSize)
{
writer.Write(id);
// Zero byte tags (but have hardcoded data associated with them
if (t.Id != TagId.BaseButtonStart &&
t.Id != TagId.FocusinButtonStart &&
t.Id != TagId.PushButtonStart &&
t.Id != TagId.UpButtonStart)
{
writer.Write(t.Value);
}
}
}
else if (tag.GetType() == typeof(UInt32ArrayTag))
{
UInt32ArrayTag t = (UInt32ArrayTag)tag;
writer.Write(id);
// JumpTo doesn't have a length set and is hardcoded to 2!
if (t.Id != TagId.JumpTo)
{
writer.Write((ushort)t.Value.Length);
}
foreach (uint val in t.Value)
{
writer.Write(val);
}
}
else if (tag.GetType() == typeof(StringTag))
{
StringTag t = (StringTag)tag;
writer.Write(id);
writer.Write(t.Value);
}
else if (tag.GetType() == typeof(MessageTag))
{
MessageTag t = (MessageTag)tag;
writer.Write(id);
writer.Write((ushort)t.parameters);
byte[] data = System.Text.Encoding.Unicode.GetBytes(t.param1);
writer.Write((ushort)data.Length);
writer.Write(data);
data = System.Text.Encoding.Unicode.GetBytes(t.param2);
writer.Write((ushort)data.Length);
writer.Write(data);
}
else if (tag.GetType() == typeof(EmpDotsCodeTag))
{
EmpDotsCodeTag t = (EmpDotsCodeTag)tag;
writer.Write(id);
writer.Write((uint)t.Value);
SerializeTag(t.FontFace, writer);
writer.Write(t.DotsCode);
}
else if (tag.GetType() == typeof(IDOnlyTag))
{
IDOnlyTag t = (IDOnlyTag)tag;
if (t.Id != TagId.StreamEnd)
{
writer.Write(id);
}
}
else if (tag.GetType() == typeof(BBeBTag))
{
BBeBTag t = (BBeBTag)tag;
if (t.Id != TagId.StreamEnd)
{
writer.Write(id);
}
}
else
{
Debug.Assert(false, "Unknown tag type: " + tag.GetType().ToString());
}
}
