1 files changed, 52 insertions, 0 deletions
diff --git a/thirdparty/includes/GSL/gsl/gsl_sf_clausen.h b/thirdparty/includes/GSL/gsl/gsl_sf_clausen.h
new file mode 100644
index 0000000..8e4ccd2
--- /dev/null
+++ b/thirdparty/includes/GSL/gsl/gsl_sf_clausen.h
@@ -0,0 +1,52 @@
+/* specfunc/gsl_sf_clausen.h
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
+ * 
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/* Author:  G. Jungman */
+
+#ifndef __GSL_SF_CLAUSEN_H__
+#define __GSL_SF_CLAUSEN_H__
+
+#include <gsl/gsl_sf_result.h>
+
+#undef __BEGIN_DECLS
+#undef __END_DECLS
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS }
+#else
+# define __BEGIN_DECLS /* empty */
+# define __END_DECLS /* empty */
+#endif
+
+__BEGIN_DECLS
+
+
+/* Calculate the Clausen integral:
+ *   Cl_2(x) := Integrate[-Log[2 Sin[t/2]], {t,0,x}]
+ *
+ * Relation to dilogarithm:
+ *   Cl_2(theta) = Im[ Li_2(e^(i theta)) ]
+ */
+int gsl_sf_clausen_e(double x, gsl_sf_result * result);
+double gsl_sf_clausen(const double x);
+
+
+__END_DECLS
+
+#endif /* __GSL_SF_CLAUSEN_H__ */