reintegration of LatCore & folder restructuration

lib/Numerical/GslQagsIntegrator.hpp

@@ -0,0 +1,58 @@
+/*
+ * GslQagsIntegrator.hpp, part of LatAnalyze 3
+ *
+ * Copyright (C) 2013 - 2016 Antonin Portelli
+ *
+ * LatAnalyze 3 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LatAnalyze 3 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LatAnalyze 3.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef Latan_GslQagsIntegrator_hpp_
+#define Latan_GslQagsIntegrator_hpp_
+
+#include <LatAnalyze/Global.hpp>
+#include <LatAnalyze/Functional/Function.hpp>
+#include <LatAnalyze/Numerical/Integrator.hpp>
+#include <gsl/gsl_integration.h>
+
+BEGIN_LATAN_NAMESPACE
+
+/******************************************************************************
+ *       GSL general quadrature adaptive integration with singularities       *
+ ******************************************************************************/
+
+class GslQagsIntegrator: public Integrator
+{
+public:
+    static const     unsigned int defaultLimit = 1000;
+    static constexpr double       defaultPrec  = 1.0e-7;
+public:
+    // constructor
+    GslQagsIntegrator(const unsigned int limit = defaultLimit,
+                      const double precision = defaultPrec);
+    // destructor
+    virtual ~GslQagsIntegrator(void);
+    // integral calculation
+    virtual double operator()(const DoubleFunction &f, const double xMin,
+                              const double xMax);
+    // get last error
+    double getLastError(void) const;
+private:
+    unsigned int              limit_;
+    double                    precision_, error_;
+    gsl_integration_workspace *workspace_;
+};
+
+END_LATAN_NAMESPACE
+
+#endif // Latan_GslQagsIntegrator_hpp_