Add Barth Jespersen Lim

src/scheme/LimitationTools.hpp

+#ifndef LIMITATION_TOOLS_HPP
+#define LIMITATION_TOOLS_HPP
+
+namespace toolsLimitation
+{
+inline double
+computeCoefLimitationBarthJespersen(const double State,
+                                    const double minval,
+                                    const double maxval,
+                                    const double minvalvois,
+                                    const double maxvalvois,
+                                    bool enableWeakBoundPositivityOnly = false)
+{
+  static constexpr double epsZer0 = 1e-14;
+  // on applique le traitement idem de l'ordre 2..
+  double coef1 = 0, coef2 = 0;
+  if (enableWeakBoundPositivityOnly) {
+    coef1                  = 1;
+    const double minGlobal = 1e-12;
+
+    if (std::fabs(minval - State) <= epsZer0)   // epsIsEqualAbs())
+      coef2 = 1.;
+    else
+      coef2 = (minGlobal - State) / ((minval - State));
+
+  } else {
+    if (std::fabs(maxval - State) <= epsZer0)   // epsIsEqualAbs())
+      coef1 = 1.;
+    else
+      coef1 = (maxvalvois - State) / ((maxval - State));
+
+    if (std::fabs(minval - State) <= epsZer0)   // epsIsEqualAbs())
+      coef2 = 1.;
+    else
+      coef2 = (minvalvois - State) / ((minval - State));
+  }
+  // return alfa =
+  return std::max(0., std::min(1., std::min(coef1, coef2)));
+  // return alfa;
+}
+}   // namespace toolsLimitation
+#endif