/// <summary> Writes a NbtTag object, and all of its child tags, to stream.
/// Use this method sparingly with NbtWriter -- constructing NbtTag objects defeats the purpose of this class.
/// If you already have lots of NbtTag objects, you might as well use NbtFile to write them all at once. </summary>
/// <param name="tag"> Tag to write. Must not be null. </param>
/// <exception cref="NbtFormatException"> No more tags can be written -OR- given tag is unacceptable at this time. </exception>
/// <exception cref="ArgumentNullException"> <paramref name="tag"/> is null </exception>
public void WriteTag([NotNull] NbtTag tag)
{
if (tag == null)
{
throw new ArgumentNullException("tag");
}
EnforceConstraints(tag.Name, tag.TagType);
if (tag.Name != null)
{
tag.WriteTag(writer);
}
else
{
tag.WriteData(writer);
}
}
private void AddToParent([NotNull] NbtTag thisTag, [NotNull] NbtTag parent)
{
if (parent is NbtList parentAsList)
{
parentAsList.Add(thisTag);
}
else
{
if (parent is NbtCompound parentAsCompound)
{
parentAsCompound.Add(thisTag);
}
else
{
// cannot happen unless NbtReader is bugged
throw new NbtFormatException(InvalidParentTagError);
}
}
}
public NbtTag ReadAsTag()
{
switch (state)
{
case NbtParseState.Error:
throw new InvalidReaderStateException(ErroneousStateError);
case NbtParseState.AtStreamEnd:
throw new EndOfStreamException();
case NbtParseState.AtStreamBeginning:
case NbtParseState.AtCompoundEnd:
ReadToFollowing();
break;
}
// get this tag
NbtTag parent;
if (TagType == NbtTagType.Compound)
{
parent = new NbtCompound(TagName);
}
else if (TagType == NbtTagType.List)
{
parent = new NbtList(TagName, ListType);
}
else if (atValue)
{
NbtTag result = ReadValueAsTag();
ReadToFollowing();
// if we're at a value tag, there are no child tags to read
return(result);
}
else
{
// end tags cannot be read-as-tags (there is no corresponding NbtTag object)
throw new InvalidOperationException(NoValueToReadError);
}
int startingDepth = Depth;
int parentDepth = Depth;
do
{
ReadToFollowing();
// Going up the file tree, or end of document: wrap up
while (Depth <= parentDepth && parent.Parent != null)
{
parent = parent.Parent;
parentDepth--;
}
if (Depth <= startingDepth)
{
break;
}
NbtTag thisTag;
if (TagType == NbtTagType.Compound)
{
thisTag = new NbtCompound(TagName);
AddToParent(thisTag, parent);
parent = thisTag;
parentDepth = Depth;
}
else if (TagType == NbtTagType.List)
{
thisTag = new NbtList(TagName, ListType);
AddToParent(thisTag, parent);
parent = thisTag;
parentDepth = Depth;
}
else if (TagType != NbtTagType.End)
{
thisTag = ReadValueAsTag();
AddToParent(thisTag, parent);
}
} while (true);
return(parent);
}
