0024135: Result of reading step file is invalid.

Now wrong multiplicity of boundary knots will be set to Degree + 1 (if it is higher).
Adding test case for issue CR24135

src/RWStepAP214/RWStepAP214_RWAppliedGroupAssignment.cxx

@@ -52,22 +52,23 @@ void RWStepAP214_RWAppliedGroupAssignment::ReadStep (const Handle(StepData_StepR
 
   // Own fields of AppliedGroupAssignment
 
-  Handle(StepAP214_HArray1OfGroupItem) aItems;
+  Handle(StepAP214_HArray1OfGroupItem) anItems;
   Standard_Integer sub2 = 0;
   if ( data->ReadSubList (num, 2, "items", ach, sub2) ) {
     Standard_Integer num2 = sub2;
     Standard_Integer nb0 = data->NbParams(num2);
-    aItems = new StepAP214_HArray1OfGroupItem (1, nb0);
+    if (nb0)
-    for ( Standard_Integer i0=1; i0 <= nb0; i0++ ) {
+    {
-      StepAP214_GroupItem anIt0;
+      anItems = new StepAP214_HArray1OfGroupItem (1, nb0);
-      data->ReadEntity (num2, i0, "items", ach, anIt0);
+      for ( Standard_Integer i0=1; i0 <= nb0; i0++ ) {
-      aItems->SetValue(i0, anIt0);
+        StepAP214_GroupItem anIt0;
+        data->ReadEntity (num2, i0, "items", ach, anIt0);
+        anItems->SetValue(i0, anIt0);
+      }
     }
   }
-
   // Initialize entity
-  ent->Init(aGroupAssignment_AssignedGroup,
+  ent->Init(aGroupAssignment_AssignedGroup, anItems);
-            aItems);
 }
 
 //=======================================================================
@@ -107,9 +108,11 @@ void RWStepAP214_RWAppliedGroupAssignment::Share (const Handle(StepAP214_Applied
   iter.AddItem (ent->StepBasic_GroupAssignment::AssignedGroup());
 
   // Own fields of AppliedGroupAssignment
-
+  if (!ent->Items().IsNull())
-  for (Standard_Integer i2=1; i2 <= ent->Items()->Length(); i2++ ) {
+  {
-    StepAP214_GroupItem Var0 = ent->Items()->Value(i2);
+    for (Standard_Integer i2=1; i2 <= ent->Items()->Length(); i2++ ) {
-    iter.AddItem (Var0.Value());
+      StepAP214_GroupItem Var0 = ent->Items()->Value(i2);
+      iter.AddItem (Var0.Value());
+    }
   }
 }

src/StepToGeom/StepToGeom_MakeBSplineCurve.pxx

@@ -36,27 +36,41 @@
 
   const Standard_Integer Deg = BSCW->Degree();
   const Standard_Integer NbPoles = BSCW->NbControlPointsList();
-  //aControlPointsList = new StepGeom_HArray1OfCartesianPoint(1,NbPoles);
-  const Handle(StepGeom_HArray1OfCartesianPoint)& aControlPointsList = BSCW->ControlPointsList();
-  Array1OfPnt_gen Poles(1,NbPoles);
-
-  Standard_Integer i;
-  CartesianPoint_gen P;
-  for (i=1; i<=NbPoles; i++)
-  {
-    if (StepToGeom_MakeCartesianPoint_gen::Convert(aControlPointsList->Value(i),P))
-      Poles.SetValue(i,P->Pnt_fonc());
-    else
-      return Standard_False;
-  }
-  
   const Standard_Integer NbKnots = BSCW->NbKnotMultiplicities();
 
   //aKnotMultiplicities = new TColStd_HArray1OfInteger(1,NbKnots);
   const Handle(TColStd_HArray1OfInteger)& aKnotMultiplicities = BSCW->KnotMultiplicities();
+  
+  Standard_Integer i;
+  Standard_Integer aFMulDiff = 0,aLMulDiff = 0;
   TColStd_Array1OfInteger Mult(1,NbKnots);
-  for (i=1; i<=NbKnots; i++) {
+  for (i=1; i<=NbKnots; ++i) {
-    Mult.SetValue(i,aKnotMultiplicities->Value(i));
+    Standard_Integer aCurrentVal = aKnotMultiplicities->Value(i);
+    if (aCurrentVal > Deg + 1)
+    {
+      if (i == 1)       aFMulDiff = aCurrentVal - Deg - 1;
+      if (i == NbKnots) aLMulDiff = aCurrentVal - Deg - 1;
+#ifdef DEB
+      cout << "\nWrong multiplicity " << aCurrentVal <<  " on " << i 
+           << " knot!" << "\nChanged to " << Deg + 1 << endl;
+#endif
+      aCurrentVal = Deg + 1;
+    }
+    Mult.SetValue(i,aCurrentVal);
+  }
+  
+  //aControlPointsList = new StepGeom_HArray1OfCartesianPoint(1,NbPoles);
+  const Handle(StepGeom_HArray1OfCartesianPoint)& aControlPointsList = BSCW->ControlPointsList();
+  Standard_Integer aSumMulDiff = aFMulDiff + aLMulDiff;
+  Array1OfPnt_gen Poles(1,NbPoles - aSumMulDiff);
+  CartesianPoint_gen P;
+  
+  for (i = 1 + aFMulDiff; i<= NbPoles - aLMulDiff; ++i)
+  {
+    if (StepToGeom_MakeCartesianPoint_gen::Convert(aControlPointsList->Value(i),P))
+      Poles.SetValue(i - aFMulDiff,P->Pnt_fonc());
+    else
+      return Standard_False;
   }
   
   //aKnots = new TColStd_HArray1OfReal(1,NbKnots);
@@ -86,7 +100,7 @@
     shouldBePeriodic = Standard_False;
     //cout << "Strange BSpline Curve Descriptor" << endl;
   }
-
+  
   if (SC->IsKind(STANDARD_TYPE(StepGeom_BSplineCurveWithKnotsAndRationalBSplineCurve))) {
     const Handle(TColStd_HArray1OfReal)& aWeight = BSCWR->WeightsData();
     TColStd_Array1OfReal W(1,NbPoles);

src/XSDRAWSTEP/XSDRAWSTEP.cxx

@@ -121,7 +121,7 @@ static Standard_Integer stepread (Draw_Interpretor& di/*theCommands*/, Standard_
   progress->Show();
 
   Standard_Boolean fromtcl = Standard_False;
-  Standard_Boolean aFullMode = 0;
+  Standard_Boolean aFullMode = Standard_False;
   Standard_Integer k = 3;
   if(argc > k )
   {

tests/bugs/step/bug24135

@@ -0,0 +1,27 @@
+puts "========"
+puts "OCC24135"
+puts "========"
+puts ""
+#######################################################################
+# Result of reading step file is invalid.
+#######################################################################
+
+set BugNumber OCC24135
+
+stepread [locate_data_file bug24135_Drum.stp] a *
+
+set exception_status 0
+set msg [ tpstat c ]
+set index [ lsearch $msg Exeption ]
+
+if {$index > -1} {
+  set exception_status 1
+}
+
+if { ${exception_status} != 0 } {
+   puts "Faulty ${BugNumber}"
+} else {
+   puts "OK ${BugNumber}"
+}
+
+set 2dviewer 0