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diff --git a/src/c/auxiliaryFunctions/isnan/cisnans.c b/src/c/auxiliaryFunctions/isnan/cisnans.c
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+/*
+ * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ * Copyright (C) 2007-2008 - INRIA - Bruno JOFRET
+ *
+ * This file must be used under the terms of the CeCILL.
+ * This source file is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at
+ * http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+ *
+ */
+
+
+
+#ifdef _MSC_VER
+#include <float.h>
+#define isnan(x) _isnan((double)x)
+#endif
+
+#include "isnan.h"
+
+
+float cisnans(floatComplex in) {
+ if ((int)(isnan(creals(in))) && (int)(isnan(cimags(in)))) return 1;
+ return 0;
+}