internal override Opcode Eval(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
StackFrame topArg = context.TopArg;
NodeSequenceBuilder builder = new NodeSequenceBuilder(context);
Value[] sequences = context.Sequences;
int basePtr = topSequenceArg.basePtr;
int index = topArg.basePtr;
while (basePtr <= topSequenceArg.endPtr)
{
NodeSequence sequence = sequences[basePtr].Sequence;
if (sequence.Count > 0)
{
NodesetIterator iterator = new NodesetIterator(sequence);
while (iterator.NextNodeset())
{
builder.StartNodeset();
while (iterator.NextItem())
{
if (context.Values[index].Boolean)
{
builder.Add(ref sequence.Items[iterator.Index]);
}
index++;
}
builder.EndNodeset();
}
context.ReplaceSequenceAt(basePtr, builder.Sequence);
context.ReleaseSequence(sequence);
builder.Sequence = null;
}
basePtr++;
}
context.PopFrame();
return(base.next);
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame sequences = context.TopSequenceArg;
StackFrame results = context.TopArg;
NodeSequenceBuilder sequenceBuilder = new NodeSequenceBuilder(context);
Value[] sequenceBuffer = context.Sequences;
for (int seqIndex = sequences.basePtr, resultIndex = results.basePtr; seqIndex <= sequences.endPtr; ++seqIndex)
{
NodeSequence sourceSequence = sequenceBuffer[seqIndex].Sequence;
if (sourceSequence.Count > 0)
{
NodesetIterator nodesetIterator = new NodesetIterator(sourceSequence);
while (nodesetIterator.NextNodeset())
{
sequenceBuilder.StartNodeset();
while (nodesetIterator.NextItem())
{
Fx.Assert(context.Values[resultIndex].IsType(ValueDataType.Boolean), "");
if (context.Values[resultIndex].Boolean)
{
sequenceBuilder.Add(ref sourceSequence.Items[nodesetIterator.Index]);
}
++resultIndex;
}
sequenceBuilder.EndNodeset();
}
context.ReplaceSequenceAt(seqIndex, sequenceBuilder.Sequence);
context.ReleaseSequence(sourceSequence);
sequenceBuilder.Sequence = null;
}
}
context.PopFrame();
return(this.next);
}