internal override Opcode Eval(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
Value[] sequences = context.Sequences;
bool sequenceStackInUse = context.SequenceStackInUse;
context.PushSequenceFrame();
for (int i = topSequenceArg.basePtr; i <= topSequenceArg.endPtr; i++)
{
NodeSequence sequence = sequences[i].Sequence;
if (sequence.Count == 0)
{
if (!sequenceStackInUse)
{
context.PushSequence(NodeSequence.Empty);
}
}
else
{
NodeSequenceItem[] items = sequence.Items;
for (int j = 0; j < sequence.Count; j++)
{
SeekableXPathNavigator contextNode = items[j].GetNavigator();
NodeSequence destSequence = context.CreateSequence();
destSequence.StartNodeset();
base.criteria.Select(contextNode, destSequence);
destSequence.StopNodeset();
context.PushSequence(destSequence);
}
}
}
return(base.next);
}
internal override void InvokeInternal(ProcessingContext context, int argCount)
{
int iterationCount = context.IterationCount;
context.PushSequenceFrame();
if (iterationCount > 0)
{
NodeSequence seq = context.CreateSequence();
seq.StartNodeset();
SeekableXPathNavigator contextNode = context.Processor.ContextNode;
long currentPosition = contextNode.CurrentPosition;
if (XPathMessageFunction.MoveToAddressingHeader(contextNode, "ReplyTo"))
{
seq.Add(contextNode);
}
seq.StopNodeset();
context.PushSequence(seq);
for (int i = 1; i < iterationCount; i++)
{
seq.refCount++;
context.PushSequence(seq);
}
contextNode.CurrentPosition = currentPosition;
}
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
Value[] sequences = context.Sequences;
bool sequenceStackInUse = context.SequenceStackInUse;
context.PushSequenceFrame();
for (int i = topSequenceArg.basePtr; i <= topSequenceArg.endPtr; i++)
{
NodeSequence sequence = sequences[i].Sequence;
if (sequence.Count == 0)
{
if (!sequenceStackInUse)
{
context.PushSequence(NodeSequence.Empty);
}
}
else
{
NodeSequenceItem[] items = sequence.Items;
for (int j = 0; j < sequence.Count; j++)
{
SeekableXPathNavigator contextNode = items[j].GetNavigator();
NodeSequence destSequence = context.CreateSequence();
destSequence.StartNodeset();
base.criteria.Select(contextNode, destSequence);
destSequence.StopNodeset();
context.PushSequence(destSequence);
}
}
}
return base.next;
}
internal override void InvokeInternal(ProcessingContext context, int argCount)
{
int iterationCount = context.IterationCount;
context.PushSequenceFrame();
if (iterationCount > 0)
{
NodeSequence seq = context.CreateSequence();
seq.StartNodeset();
SeekableXPathNavigator contextNode = context.Processor.ContextNode;
long currentPosition = contextNode.CurrentPosition;
if (XPathMessageFunction.MoveToAddressingHeader(contextNode, "RelatesTo"))
{
seq.Add(contextNode);
while (XPathMessageFunction.MoveToAddressingHeaderSibling(contextNode, "RelatesTo"))
{
seq.Add(contextNode);
}
}
seq.StopNodeset();
context.PushSequence(seq);
for (int i = 1; i < iterationCount; i++)
{
seq.refCount++;
context.PushSequence(seq);
}
contextNode.CurrentPosition = currentPosition;
}
}
internal override Opcode Eval(ProcessingContext context)
{
if (!context.LoadVariable(this.expr.Variable))
{
context.PushSequenceFrame();
NodeSequence seq = context.CreateSequence();
seq.Add(context.Processor.ContextNode);
context.PushSequence(seq);
int counterMarker = context.Processor.CounterMarker;
try
{
this.expr.Eval(context);
}
catch (XPathNavigatorException exception)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(exception.Process(this));
}
catch (NavigatorInvalidBodyAccessException exception2)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(exception2.Process(this));
}
context.Processor.CounterMarker = counterMarker;
context.PopSequenceFrame();
context.PopSequenceFrame();
context.LoadVariable(this.expr.Variable);
}
return base.next;
}
internal static void IterateAndPushSequences(ProcessingContext context)
{
StackFrame sequences = context.TopSequenceArg;
Value[] sequenceBuffer = context.Sequences;
context.PushFrame();
while (sequences.basePtr <= sequences.endPtr)
{
NodeSequence sourceSeq = sequenceBuffer[sequences.basePtr++].Sequence;
int count = sourceSeq.Count;
if (count == 0)
{
context.PushSequence(NodeSequence.Empty);
}
else
{
for (int item = 0; item < sourceSeq.Count; ++item)
{
NodeSequence newSequence = context.CreateSequence();
newSequence.StartNodeset();
newSequence.Add(ref sourceSeq.Items[item]);
newSequence.StopNodeset();
context.Push(newSequence);
}
}
}
}
internal static void IterateAndPushSequences(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
Value[] sequences = context.Sequences;
context.PushFrame();
while (topSequenceArg.basePtr <= topSequenceArg.endPtr)
{
NodeSequence sequence = sequences[topSequenceArg.basePtr++].Sequence;
if (sequence.Count == 0)
{
context.PushSequence(NodeSequence.Empty);
}
else
{
for (int i = 0; i < sequence.Count; i++)
{
NodeSequence sequence2 = context.CreateSequence();
sequence2.StartNodeset();
sequence2.Add(ref sequence.Items[i]);
sequence2.StopNodeset();
context.Push(sequence2);
}
}
}
}
internal override Opcode Eval(ProcessingContext context)
{
if (!context.LoadVariable(this.expr.Variable))
{
context.PushSequenceFrame();
NodeSequence seq = context.CreateSequence();
seq.Add(context.Processor.ContextNode);
context.PushSequence(seq);
int marker = context.Processor.CounterMarker;
try
{
this.expr.Eval(context);
}
catch (XPathNavigatorException e)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(e.Process(this));
}
catch (NavigatorInvalidBodyAccessException e)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(e.Process(this));
}
context.Processor.CounterMarker = marker;
context.PopSequenceFrame();
context.PopSequenceFrame();
context.LoadVariable(this.expr.Variable);
}
return(this.next);
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame topFrame = context.TopSequenceArg;
Value[] sequences = context.Sequences;
bool wasInUse = context.SequenceStackInUse;
context.PushSequenceFrame();
for (int i = topFrame.basePtr; i <= topFrame.endPtr; ++i)
{
NodeSequence sourceSeq = sequences[i].Sequence;
int count = sourceSeq.Count;
if (count == 0)
{
// Empty sequence.
// Since there are no nodes in the sequence, we will track this sequence also
// using an empty sequence
if (!wasInUse)
{
context.PushSequence(NodeSequence.Empty);
}
}
else
{
NodeSequenceItem[] items = sourceSeq.Items;
for (int item = 0; item < sourceSeq.Count; ++item)
{
SeekableXPathNavigator node = items[item].GetNavigator();
Fx.Assert(null != node, "");
NodeSequence newSeq = context.CreateSequence();
newSeq.StartNodeset();
this.criteria.Select(node, newSeq);
newSeq.StopNodeset();
context.PushSequence(newSeq);
}
}
}
return(this.next);
}
internal override Opcode Eval(ProcessingContext context)
{
context.PushContextSequenceFrame();
NodeSequence seq = context.CreateSequence();
seq.StartNodeset();
seq.Add(context.Processor.ContextNode);
seq.StopNodeset();
context.PushSequence(seq);
return(base.next);
}
internal override Opcode Eval(ProcessingContext context)
{
context.PushContextSequenceFrame();
NodeSequence seq = context.CreateSequence();
seq.StartNodeset();
seq.Add(context.Processor.ContextNode);
seq.StopNodeset();
context.PushSequence(seq);
return this.next;
}
internal override Opcode Eval(ProcessingContext context)
{
// The query processor object also serves as the query document root
int iterationCount = context.IterationCount;
Opcode returnOpcode = this.next;
// A root is always an initial step
context.PushSequenceFrame();
NodeSequence seq = context.CreateSequence();
if (this.next != null && 0 != (this.next.Flags & OpcodeFlags.CompressableSelect))
{
SeekableXPathNavigator node = context.Processor.ContextNode;
node.MoveToRoot();
returnOpcode = this.next.Eval(seq, node);
while (returnOpcode != null && 0 != (returnOpcode.Flags & OpcodeFlags.CompressableSelect))
{
returnOpcode = returnOpcode.Next;
}
}
else
{
// Roots do not have any qnames..
seq.StartNodeset();
SeekableXPathNavigator node = context.Processor.ContextNode;
node.MoveToRoot();
seq.Add(node);
seq.StopNodeset();
}
if (seq.Count == 0)
{
context.ReleaseSequence(seq);
seq = NodeSequence.Empty;
}
for (int i = 0; i < iterationCount; ++i)
{
context.PushSequence(seq);
}
if (iterationCount > 1)
{
seq.refCount += iterationCount - 1;
}
return(returnOpcode);
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame sequences = context.TopSequenceArg;
Value[] values = context.Values;
StackFrame resultMask = context.TopArg;
Value[] sequenceBuffer = context.Sequences;
context.PushSequenceFrame();
for (int seqIndex = sequences.basePtr; seqIndex <= sequences.endPtr; ++seqIndex)
{
NodeSequence sourceSeq = sequenceBuffer[seqIndex].Sequence;
if (sourceSeq.Count > 0)
{
NodeSequenceItem[] items = sourceSeq.Items;
NodeSequence newSeq = null;
// Loop over the sequence, selecting those items for which the previous expression returned a result that
// matches the test value. Only those items will be processed further
// Note that the original position and size information is retained.
for (int i = resultMask.basePtr, n = 0; i <= resultMask.endPtr; ++i, ++n)
{
if (this.test == values[i].Boolean)
{
if (null == newSeq)
{
newSeq = context.CreateSequence();
}
newSeq.AddCopy(ref items[n], NodeSequence.GetContextSize(sourceSeq, n));
}
else
{
if (items[n].Last && null != newSeq)
{
newSeq.Items[newSeq.Count - 1].Last = true; // maintain nodeset boundaries...
}
}
}
context.PushSequence((null == newSeq) ? NodeSequence.Empty : newSeq);
newSeq = null;
}
}
return(this.next);
}
internal bool LoadVariable(ProcessingContext context, int var)
{
if (this.subExprVars[var].seq == null)
{
return(false);
}
int iterationCount = context.IterationCount;
this.counter.IncreaseBy(iterationCount * this.subExprVars[var].count);
NodeSequence seq = this.subExprVars[var].seq;
context.PushSequenceFrame();
for (int i = 0; i < iterationCount; i++)
{
seq.refCount++;
context.PushSequence(seq);
}
return(true);
}
internal override Opcode Eval(ProcessingContext context)
{
int iterationCount = context.IterationCount;
Opcode next = base.next;
context.PushSequenceFrame();
NodeSequence empty = context.CreateSequence();
if ((base.next != null) && ((base.next.Flags & OpcodeFlags.CompressableSelect) != OpcodeFlags.None))
{
SeekableXPathNavigator contextNode = context.Processor.ContextNode;
contextNode.MoveToRoot();
next = base.next.Eval(empty, contextNode);
while ((next != null) && ((next.Flags & OpcodeFlags.CompressableSelect) != OpcodeFlags.None))
{
next = next.Next;
}
}
else
{
empty.StartNodeset();
SeekableXPathNavigator node = context.Processor.ContextNode;
node.MoveToRoot();
empty.Add(node);
empty.StopNodeset();
}
if (empty.Count == 0)
{
context.ReleaseSequence(empty);
empty = NodeSequence.Empty;
}
for (int i = 0; i < iterationCount; i++)
{
context.PushSequence(empty);
}
if (iterationCount > 1)
{
empty.refCount += iterationCount - 1;
}
return(next);
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
Value[] values = context.Values;
StackFrame topArg = context.TopArg;
Value[] sequences = context.Sequences;
context.PushSequenceFrame();
for (int i = topSequenceArg.basePtr; i <= topSequenceArg.endPtr; i++)
{
NodeSequence sequence = sequences[i].Sequence;
if (sequence.Count > 0)
{
NodeSequenceItem[] items = sequence.Items;
NodeSequence sequence2 = null;
int basePtr = topArg.basePtr;
for (int j = 0; basePtr <= topArg.endPtr; j++)
{
if (this.test == values[basePtr].Boolean)
{
if (sequence2 == null)
{
sequence2 = context.CreateSequence();
}
sequence2.AddCopy(ref items[j], NodeSequence.GetContextSize(sequence, j));
}
else if (items[j].Last && (sequence2 != null))
{
sequence2.Items[sequence2.Count - 1].Last = true;
}
basePtr++;
}
context.PushSequence((sequence2 == null) ? NodeSequence.Empty : sequence2);
sequence2 = null;
}
}
return(base.next);
}
internal override Opcode Eval(ProcessingContext context)
{
int iterationCount = context.IterationCount;
Opcode next = base.next;
context.PushSequenceFrame();
NodeSequence empty = context.CreateSequence();
if ((base.next != null) && ((base.next.Flags & OpcodeFlags.CompressableSelect) != OpcodeFlags.None))
{
SeekableXPathNavigator contextNode = context.Processor.ContextNode;
contextNode.MoveToRoot();
next = base.next.Eval(empty, contextNode);
while ((next != null) && ((next.Flags & OpcodeFlags.CompressableSelect) != OpcodeFlags.None))
{
next = next.Next;
}
}
else
{
empty.StartNodeset();
SeekableXPathNavigator node = context.Processor.ContextNode;
node.MoveToRoot();
empty.Add(node);
empty.StopNodeset();
}
if (empty.Count == 0)
{
context.ReleaseSequence(empty);
empty = NodeSequence.Empty;
}
for (int i = 0; i < iterationCount; i++)
{
context.PushSequence(empty);
}
if (iterationCount > 1)
{
empty.refCount += iterationCount - 1;
}
return next;
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
Value[] values = context.Values;
StackFrame topArg = context.TopArg;
Value[] sequences = context.Sequences;
context.PushSequenceFrame();
for (int i = topSequenceArg.basePtr; i <= topSequenceArg.endPtr; i++)
{
NodeSequence sequence = sequences[i].Sequence;
if (sequence.Count > 0)
{
NodeSequenceItem[] items = sequence.Items;
NodeSequence sequence2 = null;
int basePtr = topArg.basePtr;
for (int j = 0; basePtr <= topArg.endPtr; j++)
{
if (this.test == values[basePtr].Boolean)
{
if (sequence2 == null)
{
sequence2 = context.CreateSequence();
}
sequence2.AddCopy(ref items[j], NodeSequence.GetContextSize(sequence, j));
}
else if (items[j].Last && (sequence2 != null))
{
sequence2.Items[sequence2.Count - 1].Last = true;
}
basePtr++;
}
context.PushSequence((sequence2 == null) ? NodeSequence.Empty : sequence2);
sequence2 = null;
}
}
return base.next;
}
internal override void EvalSpecial(ProcessingContext context)
{
int counterMarker = context.Processor.CounterMarker;
if (!context.LoadVariable(base.var))
{
XPathMessageContext.HeaderFun.InvokeInternal(context, 0);
context.SaveVariable(base.var, context.Processor.ElapsedCount(counterMarker));
}
NodeSequence[] sequenceArray = new NodeSequence[base.children.Count];
NodeSequence sequence = context.Sequences[context.TopSequenceArg.basePtr].Sequence;
for (int i = 0; i < base.children.Count; i++)
{
sequenceArray[i] = context.CreateSequence();
sequenceArray[i].StartNodeset();
}
SeekableXPathNavigator node = sequence[0].GetNavigator();
if (node.MoveToFirstChild())
{
do
{
if (node.NodeType == XPathNodeType.Element)
{
List <SubExpr> list;
Dictionary <string, List <SubExpr> > dictionary;
string localName = node.LocalName;
string namespaceURI = node.NamespaceURI;
if (this.nameLookup.TryGetValue(namespaceURI, out dictionary))
{
if (dictionary.TryGetValue(localName, out list))
{
for (int k = 0; k < list.Count; k++)
{
sequenceArray[this.indexLookup[list[k]].i].Add(node);
}
}
if (dictionary.TryGetValue(QueryDataModel.Wildcard, out list))
{
for (int m = 0; m < list.Count; m++)
{
sequenceArray[this.indexLookup[list[m]].i].Add(node);
}
}
}
if (this.nameLookup.TryGetValue(QueryDataModel.Wildcard, out dictionary) && dictionary.TryGetValue(QueryDataModel.Wildcard, out list))
{
for (int n = 0; n < list.Count; n++)
{
sequenceArray[this.indexLookup[list[n]].i].Add(node);
}
}
}
}while (node.MoveToNext());
}
int num6 = context.Processor.CounterMarker;
for (int j = 0; j < base.children.Count; j++)
{
if (base.children[j].useSpecial)
{
sequenceArray[j].StopNodeset();
context.Processor.CounterMarker = num6;
context.PushSequenceFrame();
context.PushSequence(sequenceArray[j]);
for (Opcode opcode = base.children[j].FirstOp.Next; opcode != null; opcode = opcode.Eval(context))
{
}
context.SaveVariable(base.children[j].var, context.Processor.ElapsedCount(counterMarker));
context.PopSequenceFrame();
}
else
{
context.ReleaseSequence(sequenceArray[j]);
}
}
context.Processor.CounterMarker = counterMarker;
}
internal bool LoadVariable(ProcessingContext context, int var)
{
if (this.subExprVars[var].seq == null)
{
return false;
}
int iterationCount = context.IterationCount;
this.counter.IncreaseBy(iterationCount * this.subExprVars[var].count);
NodeSequence seq = this.subExprVars[var].seq;
context.PushSequenceFrame();
for (int i = 0; i < iterationCount; i++)
{
seq.refCount++;
context.PushSequence(seq);
}
return true;
}
internal override void EvalSpecial(ProcessingContext context)
{
int marker = context.Processor.CounterMarker;
if (!context.LoadVariable(this.var))
{
XPathMessageContext.HeaderFun.InvokeInternal(context, 0);
context.SaveVariable(this.var, context.Processor.ElapsedCount(marker));
}
// WS, Microsoft, see if we can put this array in the processor to save
// an allocation. Perhaps we can use the variables slot we're going to fill
NodeSequence[] childSequences = new NodeSequence[this.children.Count];
NodeSequence seq = context.Sequences[context.TopSequenceArg.basePtr].Sequence;
for (int i = 0; i < this.children.Count; ++i)
{
childSequences[i] = context.CreateSequence();
childSequences[i].StartNodeset();
}
// Perform the index
SeekableXPathNavigator nav = seq[0].GetNavigator();
if (nav.MoveToFirstChild())
{
do
{
if (nav.NodeType == XPathNodeType.Element)
{
List <SubExpr> lst;
string name = nav.LocalName;
string ns = nav.NamespaceURI;
Dictionary <string, List <SubExpr> > nextLookup;
if (this.nameLookup.TryGetValue(ns, out nextLookup))
{
if (nextLookup.TryGetValue(name, out lst))
{
for (int i = 0; i < lst.Count; ++i)
{
childSequences[this.indexLookup[lst[i]].i].Add(nav);
}
}
if (nextLookup.TryGetValue(QueryDataModel.Wildcard, out lst))
{
for (int i = 0; i < lst.Count; ++i)
{
childSequences[this.indexLookup[lst[i]].i].Add(nav);
}
}
}
if (this.nameLookup.TryGetValue(QueryDataModel.Wildcard, out nextLookup))
{
if (nextLookup.TryGetValue(QueryDataModel.Wildcard, out lst))
{
for (int i = 0; i < lst.Count; ++i)
{
childSequences[this.indexLookup[lst[i]].i].Add(nav);
}
}
}
}
} while (nav.MoveToNext());
}
int secondMarker = context.Processor.CounterMarker;
for (int i = 0; i < this.children.Count; ++i)
{
if (this.children[i].useSpecial)
{
childSequences[i].StopNodeset();
context.Processor.CounterMarker = secondMarker;
context.PushSequenceFrame();
context.PushSequence(childSequences[i]);
Opcode op = this.children[i].FirstOp.Next;
while (op != null)
{
op = op.Eval(context);
}
context.SaveVariable(this.children[i].var, context.Processor.ElapsedCount(marker));
context.PopSequenceFrame();
}
else
{
context.ReleaseSequence(childSequences[i]);
//context.SetVariable(this.children[i].Variable, null, 0);
}
}
context.Processor.CounterMarker = marker;
}
internal override void EvalSpecial(ProcessingContext context)
{
int counterMarker = context.Processor.CounterMarker;
if (!context.LoadVariable(base.var))
{
XPathMessageContext.HeaderFun.InvokeInternal(context, 0);
context.SaveVariable(base.var, context.Processor.ElapsedCount(counterMarker));
}
NodeSequence[] sequenceArray = new NodeSequence[base.children.Count];
NodeSequence sequence = context.Sequences[context.TopSequenceArg.basePtr].Sequence;
for (int i = 0; i < base.children.Count; i++)
{
sequenceArray[i] = context.CreateSequence();
sequenceArray[i].StartNodeset();
}
SeekableXPathNavigator node = sequence[0].GetNavigator();
if (node.MoveToFirstChild())
{
do
{
if (node.NodeType == XPathNodeType.Element)
{
List<SubExpr> list;
Dictionary<string, List<SubExpr>> dictionary;
string localName = node.LocalName;
string namespaceURI = node.NamespaceURI;
if (this.nameLookup.TryGetValue(namespaceURI, out dictionary))
{
if (dictionary.TryGetValue(localName, out list))
{
for (int k = 0; k < list.Count; k++)
{
sequenceArray[this.indexLookup[list[k]].i].Add(node);
}
}
if (dictionary.TryGetValue(QueryDataModel.Wildcard, out list))
{
for (int m = 0; m < list.Count; m++)
{
sequenceArray[this.indexLookup[list[m]].i].Add(node);
}
}
}
if (this.nameLookup.TryGetValue(QueryDataModel.Wildcard, out dictionary) && dictionary.TryGetValue(QueryDataModel.Wildcard, out list))
{
for (int n = 0; n < list.Count; n++)
{
sequenceArray[this.indexLookup[list[n]].i].Add(node);
}
}
}
}
while (node.MoveToNext());
}
int num6 = context.Processor.CounterMarker;
for (int j = 0; j < base.children.Count; j++)
{
if (base.children[j].useSpecial)
{
sequenceArray[j].StopNodeset();
context.Processor.CounterMarker = num6;
context.PushSequenceFrame();
context.PushSequence(sequenceArray[j]);
for (Opcode opcode = base.children[j].FirstOp.Next; opcode != null; opcode = opcode.Eval(context))
{
}
context.SaveVariable(base.children[j].var, context.Processor.ElapsedCount(counterMarker));
context.PopSequenceFrame();
}
else
{
context.ReleaseSequence(sequenceArray[j]);
}
}
context.Processor.CounterMarker = counterMarker;
}
internal static void IterateAndPushSequences(ProcessingContext context)
{
StackFrame topSequenceArg = context.TopSequenceArg;
Value[] sequences = context.Sequences;
context.PushFrame();
while (topSequenceArg.basePtr <= topSequenceArg.endPtr)
{
NodeSequence sequence = sequences[topSequenceArg.basePtr++].Sequence;
if (sequence.Count == 0)
{
context.PushSequence(NodeSequence.Empty);
}
else
{
for (int i = 0; i < sequence.Count; i++)
{
NodeSequence sequence2 = context.CreateSequence();
sequence2.StartNodeset();
sequence2.Add(ref sequence.Items[i]);
sequence2.StopNodeset();
context.Push(sequence2);
}
}
}
}
internal override Opcode Eval(ProcessingContext context)
{
// The query processor object also serves as the query document root
int iterationCount = context.IterationCount;
Opcode returnOpcode = this.next;
// A root is always an initial step
context.PushSequenceFrame();
NodeSequence seq = context.CreateSequence();
if (this.next != null && 0 != (this.next.Flags & OpcodeFlags.CompressableSelect))
{
SeekableXPathNavigator node = context.Processor.ContextNode;
node.MoveToRoot();
returnOpcode = this.next.Eval(seq, node);
while (returnOpcode != null && 0 != (returnOpcode.Flags & OpcodeFlags.CompressableSelect))
{
returnOpcode = returnOpcode.Next;
}
}
else
{
// Roots do not have any qnames..
seq.StartNodeset();
SeekableXPathNavigator node = context.Processor.ContextNode;
node.MoveToRoot();
seq.Add(node);
seq.StopNodeset();
}
if (seq.Count == 0)
{
context.ReleaseSequence(seq);
seq = NodeSequence.Empty;
}
for (int i = 0; i < iterationCount; ++i)
{
context.PushSequence(seq);
}
if (iterationCount > 1)
seq.refCount += iterationCount - 1;
return returnOpcode;
}
internal override Opcode Eval(ProcessingContext context)
{
StackFrame topFrame = context.TopSequenceArg;
Value[] sequences = context.Sequences;
bool wasInUse = context.SequenceStackInUse;
context.PushSequenceFrame();
for (int i = topFrame.basePtr; i <= topFrame.endPtr; ++i)
{
NodeSequence sourceSeq = sequences[i].Sequence;
int count = sourceSeq.Count;
if (count == 0)
{
// Empty sequence.
// Since there are no nodes in the sequence, we will track this sequence also
// using an empty sequence
if (!wasInUse)
context.PushSequence(NodeSequence.Empty);
}
else
{
NodeSequenceItem[] items = sourceSeq.Items;
for (int item = 0; item < sourceSeq.Count; ++item)
{
SeekableXPathNavigator node = items[item].GetNavigator();
Fx.Assert(null != node, "");
NodeSequence newSeq = context.CreateSequence();
newSeq.StartNodeset();
this.criteria.Select(node, newSeq);
newSeq.StopNodeset();
context.PushSequence(newSeq);
}
}
}
return this.next;
}
internal override void InvokeInternal(ProcessingContext context, int argCount)
{
int count = context.IterationCount;
context.PushSequenceFrame();
if (count > 0)
{
NodeSequence seq = context.CreateSequence();
seq.StartNodeset();
SeekableXPathNavigator nav = context.Processor.ContextNode;
long p = nav.CurrentPosition;
if (MoveToBody(nav))
{
seq.Add(nav);
}
nav.CurrentPosition = p;
seq.StopNodeset();
context.PushSequence(seq);
for (int i = 1; i < count; ++i)
{
seq.refCount++;
context.PushSequence(seq);
}
}
}
internal override void EvalSpecial(ProcessingContext context)
{
int marker = context.Processor.CounterMarker;
if (!context.LoadVariable(this.var))
{
XPathMessageContext.HeaderFun.InvokeInternal(context, 0);
context.SaveVariable(this.var, context.Processor.ElapsedCount(marker));
}
// WS, [....], see if we can put this array in the processor to save
// an allocation. Perhaps we can use the variables slot we're going to fill
NodeSequence[] childSequences = new NodeSequence[this.children.Count];
NodeSequence seq = context.Sequences[context.TopSequenceArg.basePtr].Sequence;
for (int i = 0; i < this.children.Count; ++i)
{
childSequences[i] = context.CreateSequence();
childSequences[i].StartNodeset();
}
// Perform the index
SeekableXPathNavigator nav = seq[0].GetNavigator();
if (nav.MoveToFirstChild())
{
do
{
if (nav.NodeType == XPathNodeType.Element)
{
List<SubExpr> lst;
string name = nav.LocalName;
string ns = nav.NamespaceURI;
Dictionary<string, List<SubExpr>> nextLookup;
if (this.nameLookup.TryGetValue(ns, out nextLookup))
{
if (nextLookup.TryGetValue(name, out lst))
{
for (int i = 0; i < lst.Count; ++i)
{
childSequences[this.indexLookup[lst[i]].i].Add(nav);
}
}
if (nextLookup.TryGetValue(QueryDataModel.Wildcard, out lst))
{
for (int i = 0; i < lst.Count; ++i)
{
childSequences[this.indexLookup[lst[i]].i].Add(nav);
}
}
}
if (this.nameLookup.TryGetValue(QueryDataModel.Wildcard, out nextLookup))
{
if (nextLookup.TryGetValue(QueryDataModel.Wildcard, out lst))
{
for (int i = 0; i < lst.Count; ++i)
{
childSequences[this.indexLookup[lst[i]].i].Add(nav);
}
}
}
}
} while (nav.MoveToNext());
}
int secondMarker = context.Processor.CounterMarker;
for (int i = 0; i < this.children.Count; ++i)
{
if (this.children[i].useSpecial)
{
childSequences[i].StopNodeset();
context.Processor.CounterMarker = secondMarker;
context.PushSequenceFrame();
context.PushSequence(childSequences[i]);
Opcode op = this.children[i].FirstOp.Next;
while (op != null)
{
op = op.Eval(context);
}
context.SaveVariable(this.children[i].var, context.Processor.ElapsedCount(marker));
context.PopSequenceFrame();
}
else
{
context.ReleaseSequence(childSequences[i]);
//context.SetVariable(this.children[i].Variable, null, 0);
}
}
context.Processor.CounterMarker = marker;
}
internal static void IterateAndPushSequences(ProcessingContext context)
{
StackFrame sequences = context.TopSequenceArg;
Value[] sequenceBuffer = context.Sequences;
context.PushFrame();
while (sequences.basePtr <= sequences.endPtr)
{
NodeSequence sourceSeq = sequenceBuffer[sequences.basePtr++].Sequence;
int count = sourceSeq.Count;
if (count == 0)
{
context.PushSequence(NodeSequence.Empty);
}
else
{
for (int item = 0; item < sourceSeq.Count; ++item)
{
NodeSequence newSequence = context.CreateSequence();
newSequence.StartNodeset();
newSequence.Add(ref sourceSeq.Items[item]);
newSequence.StopNodeset();
context.Push(newSequence);
}
}
}
}