Token ReadToken()
{
while (_tokenStack.Count == 0)
{
if (_fbxAsciiFileInfo.IsEndOfStream())
{
_tokenStack.Push(Token.CreateEndOfStream());
}
else if (AsciiTokenParser.TryConsumeWhiteSpace(_fbxAsciiFileInfo))
{
continue;
}
else if (AsciiTokenParser.TryParseCommentToken(_fbxAsciiFileInfo, out var _))
{
continue;
}
else if (AsciiTokenParser.TryParseOperatorToken(_fbxAsciiFileInfo, out var operatorToken))
{
_tokenStack.Push(operatorToken);
}
else if (AsciiTokenParser.TryParseNumberToken(_fbxAsciiFileInfo, out var numberToken))
{
_tokenStack.Push(numberToken);
}
else if (AsciiTokenParser.TryParseStringToken(_fbxAsciiFileInfo, out var stringToken))
{
_tokenStack.Push(stringToken);
}
else if (AsciiTokenParser.TryParseIdentifierOrCharToken(_fbxAsciiFileInfo, out var token))
{
_tokenStack.Push(token);
}
else
{
throw new FbxException(_fbxAsciiFileInfo, $"Unknown character {_fbxAsciiFileInfo.PeekChar()}");
}
}
return(_tokenStack.Pop());
}
/// <summary>
/// Reads a full document from the stream
/// </summary>
/// <returns>The complete document object</returns>
public FbxDocument Read()
{
var ret = new FbxDocument();
// Read version string
const string versionString = @"; FBX (\d)\.(\d)\.(\d) project file";
AsciiTokenParser.TryConsumeWhiteSpace(_fbxAsciiFileInfo);
bool hasVersionString = false;
if (AsciiTokenParser.TryParseCommentToken(_fbxAsciiFileInfo, out var commentToken))
{
var match = Regex.Match(commentToken.Value, versionString);
hasVersionString = match.Success;
if (hasVersionString)
{
ret.Version = (FbxVersion)(
int.Parse(match.Groups[1].Value) * 1000 +
int.Parse(match.Groups[2].Value) * 100 +
int.Parse(match.Groups[3].Value) * 10
);
}
}
if (!hasVersionString && _errorLevel >= ErrorLevel.Strict)
{
throw new FbxException(_fbxAsciiFileInfo, "Invalid version string; first line must match \"" + versionString + "\"");
}
FbxNode node;
while ((node = ReadNode()) != null)
{
ret.AddNode(node);
}
return(ret);
}
