public override CodeNode VisitSkipArrayAssignmentIfLengthIsZero(SkipArrayAssignmentIfLengthIsZeroNode node)
{
_Writer.WriteStartElement("SkipArrayAssignmentIfLengthIsZero");
_Writer.WriteAttributeString("LengthIndex", node.LengthIndex.ToString());
_Writer.WriteEndElement();
return(node);
}
CodeNode GenerateArrayAssignment(KeyValuePair <FieldLayoutAttribute, PropertyInfo> pair)
{
var fieldType = pair.Key.FieldType;
bool isNibbleArray = pair.Key is NibbleArrayFieldLayoutAttribute;
int lengthIndex = ((ArrayFieldLayoutAttribute)pair.Key).ArrayLengthFieldIndex;
//we can skip entirely if the length field was zero
//we'll combine this as part of the "reading" of the field
var parseConditionNode = new SkipArrayAssignmentIfLengthIsZeroNode(lengthIndex);
//find out if we should even parse this field
if (pair.Value != null && !ShouldParseField(pair.Value.Name))
{
//we can simply return this skip node since it effectively encapsulates the length check as well
return(new SkipTypeNode(fieldType.MakeArrayType(), lengthIndex));
}
else
{
var readNode = new ReadTypeNode(fieldType.MakeArrayType(), lengthIndex, isNibble: isNibbleArray);
BlockNode assignmentBlock = null;
if (pair.Value != null)
{
assignmentBlock = new BlockNode(new AssignFieldToPropertyNode(fieldType.MakeArrayType(), pair.Value));
}
//return a FieldAssignmentNode. Note we're combining the parseConditionNode and the readNode.
return(new FieldAssignmentNode(fieldType.MakeArrayType(), pair.Key.FieldIndex, new BlockNode(parseConditionNode, readNode), assignmentBlock));
}
}
public override CodeNode VisitSkipArrayAssignmentIfLengthIsZero(SkipArrayAssignmentIfLengthIsZeroNode node)
{
if (!_InFieldAssignment)
{
throw new InvalidOperationException("SkipArrayAssignmentIfLengthIsZeroNode must be in a FieldAssignmentNode");
}
//If the length field is zero, skip past assignment
var lengthLocal = _FieldLocals[node.LengthIndex];
ILGen.Ldloc(lengthLocal);
ILGen.Brfalse(_SkipAssignmentLabel);
return(node);
}
public virtual CodeNode VisitSkipArrayAssignmentIfLengthIsZero(SkipArrayAssignmentIfLengthIsZeroNode node)
{
return(node);
}