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+/*
+ * ECOS - Embedded Conic Solver.
+ * Copyright (C) 2012-2015 A. Domahidi [domahidi@embotech.com],
+ * Automatic Control Lab, ETH Zurich & embotech GmbH, Zurich, Switzerland.
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * The exponental cone module is (c) Santiago Akle, Stanford University,
+ * [akle@stanford.edu]
+ *
+ */
+
+#include "cone.h"
+#include "glblopts.h"
+#include "wright_omega.h"
+#include <math.h>
+#ifndef __ECOS_EXP_H__
+#define __ECOS_EXP_H__
+
+#if defined EXPCONE
+/*
+ * Exponential cone structure: We save the index where each expcone Hessian
+ * column starts in the csr format. For each cone we also allocate space for
+ * the gradient of the barrier at each cone and the values of entries of the
+ * Hessian matrix
+ */
+typedef struct expcone
+{
+ idxint colstart[3]; /* All cones are fixed size, we store the index
+ * where the column of the hessian starts in the
+ * permuted Newton system.
+ */
+ pfloat v[6]; /* Uper triangular section of the hessian */
+ pfloat g[3]; /* Gradient of the barrier */
+} expcone;
+
+/*
+ * Evaluates the Hessian of the exponential dual cone barrier at the triplet
+ * w[0],w[1],w[2], and stores the upper triangular part of the matrix mu*H(w)
+ * at v[0],...,v[5]. The entries of the Hessian are arranged columnwise into v
+ */
+void evalExpHessian(pfloat* w, pfloat* v, pfloat mu);
+
+/*
+ * Evaluates the gradient of the dual exponential cone barrier g^\star(z) at the triplet
+ * w[0],w[1],w[2], and stores the result at g[0],..,g[2].
+ */
+void evalExpGradient(pfloat* w, pfloat* g);
+
+/*
+ * Computes f_e(s_e) + f^\star_e(z_e)
+ */
+pfloat evalBarrierValue(pfloat* siter, pfloat *ziter, idxint fc, idxint nexc);
+
+/*
+ * Multiplies by y+=muH*x
+ */
+void scaleToAddExpcone(pfloat* y, pfloat* x, expcone* expcones, idxint nexc, idxint fc);
+
+/*
+ * Returns 1 if s is primal feasible w.r.t the primal exponential
+ * cone and 0 i.o.c
+ */
+idxint evalExpPrimalFeas(pfloat *s, idxint nexc);
+
+/*
+ * Returns 1 if s is dual feasible w.r.t the dual exponential
+ * cone and 0 i.o.c
+ */
+idxint evalExpDualFeas(pfloat *s, idxint nexc);
+
+#endif
+#endif /* End ifndef __ECOS_EXP_H__ */
+