Integration of OCCT 6.5.0 from SVN

src/Expr/Expr_LogOf10.cxx

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+//static const char* sccsid = "@(#)Expr_LogOf10.cxx	3.2 95/01/10"; // Do not delete this line. Used by sccs.
+// Copyright: 	Matra-Datavision 1991
+// File:	Expr_LogOf10.cxx
+// Created:	Mon May 27 17:48:44 1991
+// Author:	Arnaud BOUZY
+//		<adn>
+
+#include <Expr_LogOf10.ixx>
+#include <Expr_NumericValue.hxx>
+#include <Expr_Division.hxx>
+#include <Expr_Product.hxx>
+#include <Expr_Operators.hxx>
+#include <Expr.hxx>
+
+Expr_LogOf10::Expr_LogOf10(const Handle(Expr_GeneralExpression)& exp)
+{
+  CreateOperand(exp);
+}
+
+Handle(Expr_GeneralExpression) Expr_LogOf10::ShallowSimplified () const
+{
+  Handle(Expr_GeneralExpression) myexp = Operand();
+  if (myexp->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
+    Handle(Expr_NumericValue) myNVexp = Handle(Expr_NumericValue)::DownCast(myexp);
+    return new Expr_NumericValue(Log10(myNVexp->GetValue()));
+  }
+  Handle(Expr_LogOf10) me = this;
+  return me;
+}
+
+Handle(Expr_GeneralExpression) Expr_LogOf10::Copy () const
+{
+  return new Expr_LogOf10(Expr::CopyShare(Operand()));
+}
+
+Standard_Boolean Expr_LogOf10::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
+{
+  if (Other->IsKind(STANDARD_TYPE(Expr_LogOf10))) {
+    Handle(Expr_GeneralExpression) myexp = Operand();
+    return myexp->IsIdentical(Other->SubExpression(1));
+  }
+  return Standard_False;
+}
+
+Standard_Boolean Expr_LogOf10::IsLinear () const
+{
+  return !ContainsUnknowns();
+}
+
+Handle(Expr_GeneralExpression) Expr_LogOf10::Derivative (const Handle(Expr_NamedUnknown)& X) const
+{
+  if (!Contains(X)) {
+    return new Expr_NumericValue(0.0);
+  }
+  Handle(Expr_GeneralExpression) myexp = Operand();
+  Handle(Expr_GeneralExpression) myder = myexp->Derivative(X);
+  Standard_Real vlog = Log(10.0);
+  Handle(Expr_NumericValue) vallog = new Expr_NumericValue(vlog);
+  Handle(Expr_Product) theprod = Expr::CopyShare(myexp) * vallog;
+  Handle(Expr_Division) thediv = myder / theprod->ShallowSimplified();
+  return thediv->ShallowSimplified();
+}
+
+Standard_Real Expr_LogOf10::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
+{
+  return ::Log10(Operand()->Evaluate(vars,vals));
+}
+
+TCollection_AsciiString Expr_LogOf10::String() const
+{
+  TCollection_AsciiString str("log(");
+  str += Operand()->String();
+  str += ")";
+  return str;
+}