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//static const char* sccsid = "@(#)Expr.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr.cxx
// Created: Fri Sep 20 11:23:07 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr.hxx>
#include <Expr_NamedUnknown.hxx>
#include <Expr_GeneralExpression.hxx>
#include <Expr_GeneralRelation.hxx>
#include <Expr_UnknownIterator.hxx>
#include <Expr_RUIterator.hxx>
Handle(Expr_GeneralExpression) Expr::CopyShare(const Handle(Expr_GeneralExpression)& exp)
{
if (exp->IsShareable()) {
return exp;
}
return exp->Copy();
}
Standard_Integer Expr::NbOfFreeVariables(const Handle(Expr_GeneralRelation)& rel)
{
Standard_Integer nbvar = 0;
Expr_RUIterator rit(rel);
while (rit.More()) {
if (!rit.Value()->IsAssigned()) {
nbvar++;
}
rit.Next();
}
return nbvar;
}
Standard_Integer Expr::NbOfFreeVariables(const Handle(Expr_GeneralExpression)& exp)
{
Standard_Integer nbvar = 0;
Expr_UnknownIterator uit(exp);
while (uit.More()) {
if (!uit.Value()->IsAssigned()) {
nbvar++;
}
uit.Next();
}
return nbvar;
}
Standard_Real Expr::Sign(const Standard_Real val)
{
return ::Sign(1.0,val);
}
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