public override CodeNode VisitSetLengthLocal(SetLengthLocalNode node)
{
Log($"Setting length for field {node.LengthFieldIndex}.");
var arrayFieldLocal = _FieldLocals[node.ArrayFieldIndex];
var lengthFieldLocal = _FieldLocals[node.LengthFieldIndex];
//TODO: this code is duplicated in VisitValidateSharedLengthLocal
var notNull = ILGen.DefineLabel();
var storeLength = ILGen.DefineLabel();
//if the array is not null, goto notNull
ILGen.Ldloc(arrayFieldLocal);
ILGen.Ldnull();
ILGen.Ceq();
ILGen.Brfalse(notNull);
//it is null, treat the length as 0 and compare the length
Log($"Array is null (treat as zero length).");
ILGen.Ldc_I4_0();
ILGen.Br(storeLength);
//array is not null. get its real length
ILGen.MarkLabel(notNull);
Log($"Getting array length.");
ILGen.Ldloc(arrayFieldLocal);
ILGen.Ldlen();
ILGen.Br(storeLength);
//store the length
ILGen.MarkLabel(storeLength);
Log($"Storing array length.");
ILGen.Stloc(lengthFieldLocal);
return(node);
}
public override CodeNode VisitSetLengthLocal(SetLengthLocalNode node)
{
_Writer.WriteStartElement("SetLengthLocal");
_Writer.WriteAttributeString("ArrayFieldIndex", node.ArrayFieldIndex.ToString());
_Writer.WriteAttributeString("LengthFieldIndex", node.LengthFieldIndex.ToString());
_Writer.WriteEndElement();
return(node);
}
public virtual CodeNode VisitSetLengthLocal(SetLengthLocalNode node)
{
return(node);
}