// Gets a single timestamp component
static int GetTimestampVar(FbxNode timestamp, string element)
{
var elementNode = timestamp[element];
if (elementNode != null && elementNode.Properties.Count > 0)
{
var prop = elementNode.Properties[0];
if (prop is int || prop is long)
{
return((int)prop);
}
}
throw new FbxException(timePath, -1, "Timestamp has no " + element);
}
/// <summary>
/// Returns all sub-nodes with name
/// </summary>
/// <returns></returns>
private List <FbxNode> GetNodesByValue(FbxNode node, string value, List <FbxNode> c = null)
{
if (c == null)
{
c = new List <FbxNode>();
}
if (node == null)
{
return(c);
}
if (node.Value != null && node.Value.ToString().Equals(value))
{
c.Add(node);
}
foreach (var child in node.Nodes)
{
GetNodesByValue(child, value, c);
}
return(c);
}
/// <summary>
/// Returns all sub-nodes with name
/// </summary>
/// <returns></returns>
private List <FbxNode> GetNodesByName(FbxNode node, string name, List <FbxNode> c = null)
{
if (c == null)
{
c = new List <FbxNode>();
}
if (node == null)
{
return(c);
}
if (node.Name.Equals(name))
{
c.Add(node);
}
foreach (var child in node.Nodes)
{
GetNodesByName(child, name, c);
}
return(c);
}
/// <summary>
/// Reads the next node from the stream
/// </summary>
/// <returns>The read node, or <c>null</c></returns>
public FbxNode ReadNode()
{
var first = ReadToken();
var id = first as Identifier;
if (id == null)
{
if (first is EndOfStream)
{
return(null);
}
throw new FbxException(line, column,
"Unexpected '" + first + "', expected an identifier");
}
var node = new FbxNode {
Name = id.String
};
// Read properties
object token;
bool expectComma = false;
while (!'{'.Equals(token = ReadToken()) && !(token is Identifier) && !'}'.Equals(token))
{
if (expectComma)
{
if (!','.Equals(token))
{
throw new FbxException(line, column,
"Unexpected '" + token + "', expected a ','");
}
expectComma = false;
continue;
}
if (token is char)
{
var c = (char)token;
switch (c)
{
case '*':
token = ReadArray();
break;
case '}':
case ':':
case ',':
throw new FbxException(line, column,
"Unexpected '" + c + "' in property list");
}
}
node.Properties.Add(token);
expectComma = true; // The final comma before the open brace isn't required
}
// TODO: Merge property list into an array as necessary
// Now we're either at an open brace, close brace or a new node
if (token is Identifier || '}'.Equals(token))
{
prevToken = token;
return(node);
}
// The while loop can't end unless we're at an open brace, so we can continue right on
object endBrace;
while (!'}'.Equals(endBrace = ReadToken()))
{
prevToken = endBrace; // If it's not an end brace, the next node will need it
node.Nodes.Add(ReadNode());
}
if (node.Nodes.Count < 1) // If there's an open brace, we want that to be preserved
{
node.Nodes.Add(null);
}
return(node);
}
// Adds the given node text to the string
void BuildString(FbxNode node, StringBuilder sb, bool writeArrayLength, int indentLevel = 0)
{
nodePath.Push(node.Name ?? "");
int lineStart = sb.Length;
// Write identifier
for (int i = 0; i < indentLevel; i++)
{
sb.Append('\t');
}
sb.Append(node.Name).Append(':');
// Write properties
var first = true;
for (int j = 0; j < node.Properties.Count; j++)
{
var p = node.Properties[j];
if (p == null)
{
continue;
}
if (!first)
{
sb.Append(',');
}
sb.Append(' ');
if (p is string)
{
sb.Append('"').Append(p).Append('"');
}
else if (p is Array)
{
var array = (Array)p;
var elementType = p.GetType().GetElementType();
// ReSharper disable once PossibleNullReferenceException
// We know it's an array, so we don't need to check for null
if (array.Rank != 1 || !elementType.IsPrimitive)
{
throw new FbxException(nodePath, j,
"Invalid array type " + p.GetType());
}
if (writeArrayLength)
{
sb.Append('*').Append(array.Length).Append(" {\n");
lineStart = sb.Length;
for (int i = -1; i < indentLevel; i++)
{
sb.Append('\t');
}
sb.Append("a: ");
}
bool pFirst = true;
foreach (var v in (Array)p)
{
if (!pFirst)
{
sb.Append(',');
}
var vstr = v.ToString();
if ((sb.Length - lineStart) + vstr.Length >= MaxLineLength)
{
sb.Append('\n');
lineStart = sb.Length;
}
sb.Append(vstr);
pFirst = false;
}
if (writeArrayLength)
{
sb.Append('\n');
for (int i = 0; i < indentLevel; i++)
{
sb.Append('\t');
}
sb.Append('}');
}
}
else if (p is char)
{
sb.Append((char)p);
}
else if (p.GetType().IsPrimitive&& p is IFormattable)
{
sb.Append(p);
}
else
{
throw new FbxException(nodePath, j,
"Invalid property type " + p.GetType());
}
first = false;
}
// Write child nodes
if (node.Nodes.Count > 0)
{
sb.Append(" {\n");
foreach (var n in node.Nodes)
{
if (n == null)
{
continue;
}
BuildString(n, sb, writeArrayLength, indentLevel + 1);
}
for (int i = 0; i < indentLevel; i++)
{
sb.Append('\t');
}
sb.Append('}');
}
sb.Append('\n');
nodePath.Pop();
}
// Writes a single document to the buffer
void WriteNode(FbxNode node)
{
if (node == null)
{
stream.BaseStream.Write(nullData, 0, nullData.Length);
}
else
{
nodePath.Push(node.Name ?? "");
var name = string.IsNullOrEmpty(node.Name) ? null : Encoding.ASCII.GetBytes(node.Name);
if (name != null && name.Length > byte.MaxValue)
{
throw new FbxException(stream.BaseStream.Position,
"Node name is too long");
}
// Header
var endOffsetPos = stream.BaseStream.Position;
stream.Write(0); // End offset placeholder
stream.Write(node.Properties.Count);
var propertyLengthPos = stream.BaseStream.Position;
stream.Write(0); // Property length placeholder
stream.Write((byte)(name?.Length ?? 0));
if (name != null)
{
stream.Write(name);
}
// Write properties and length
var propertyBegin = stream.BaseStream.Position;
for (int i = 0; i < node.Properties.Count; i++)
{
WriteProperty(node.Properties[i], i);
}
var propertyEnd = stream.BaseStream.Position;
stream.BaseStream.Position = propertyLengthPos;
stream.Write((int)(propertyEnd - propertyBegin));
stream.BaseStream.Position = propertyEnd;
// Write child nodes
if (node.Nodes.Count > 0)
{
foreach (var n in node.Nodes)
{
if (n == null)
{
continue;
}
WriteNode(n);
}
WriteNode(null);
}
// Write end offset
var dataEnd = stream.BaseStream.Position;
stream.BaseStream.Position = endOffsetPos;
stream.Write((int)dataEnd);
stream.BaseStream.Position = dataEnd;
nodePath.Pop();
}
}
/// <summary>
/// Reads a single node.
/// </summary>
/// <remarks>
/// This won't read the file header or footer, and as such will fail if the stream is a full FBX file
/// </remarks>
/// <returns>The node</returns>
/// <exception cref="FbxException">The FBX data was malformed
/// for the reader's error level</exception>
public FbxNode ReadNode(int version)
{
var endOffset = (version > 7400) ? stream.ReadInt64() : stream.ReadInt32();
var numProperties = (version > 7400) ? stream.ReadInt64() : stream.ReadInt32();
var propertyListLen = (version > 7400) ? stream.ReadInt64() : stream.ReadInt32();
var nameLen = stream.ReadByte();
var name = nameLen == 0 ? "" : Encoding.ASCII.GetString(stream.ReadBytes(nameLen));
if (endOffset == 0)
{
// The end offset should only be 0 in a null node
if (errorLevel >= ErrorLevel.Checked && (numProperties != 0 || propertyListLen != 0 || !string.IsNullOrEmpty(name)))
{
throw new FbxException(stream.BaseStream.Position,
"Invalid node; expected NULL record");
}
return(null);
}
var node = new FbxNode {
Name = name
};
var propertyEnd = stream.BaseStream.Position + propertyListLen;
// Read properties
for (int i = 0; i < numProperties; i++)
{
node.Properties.Add(ReadProperty());
}
if (errorLevel >= ErrorLevel.Checked && stream.BaseStream.Position != propertyEnd)
{
throw new FbxException(stream.BaseStream.Position,
"Too many bytes in property list, end point is " + propertyEnd);
}
// Read nested nodes
var listLen = endOffset - stream.BaseStream.Position;
if (errorLevel >= ErrorLevel.Checked && listLen < 0)
{
throw new FbxException(stream.BaseStream.Position,
"Node has invalid end point");
}
if (listLen > 0)
{
FbxNode nested;
do
{
nested = ReadNode(version);
node.Nodes.Add(nested);
} while (nested != null);
if (errorLevel >= ErrorLevel.Checked && stream.BaseStream.Position != endOffset)
{
throw new FbxException(stream.BaseStream.Position,
"Too many bytes in node, end point is " + endOffset);
}
}
return(node);
}
