1 files changed, 36 insertions, 0 deletions
diff --git a/src/c/matrixOperations/spec2/sspec2a.c b/src/c/matrixOperations/spec2/sspec2a.c
new file mode 100644
index 0000000..d3ab00d
--- /dev/null
+++ b/src/c/matrixOperations/spec2/sspec2a.c
@@ -0,0 +1,36 @@
+/*
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2008 - INRIA - Arnaud TORSET
+ *
+ *  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
+ *
+ */
+ 
+#include <stdlib.h>
+#include "spec.h"
+
+
+
+void sspec2a(float* in, int rows, float* eigenvalues,float* eigenvectors){
+	/* As we use Lapack to find the eigenvalues, we must cast the float input into double
+	and the doubleComplex outputs of dspec2a into floatComplex*/
+	
+	int i;
+	double* dblin;
+	double *dbleigenvalues,*dbleigenvectors;
+	
+	dblin=(double*)malloc((unsigned int)(rows*rows)*sizeof(double));
+	dbleigenvalues = (double*)malloc((unsigned int)(rows*rows)*sizeof(double));	
+	dbleigenvectors = (double*)malloc((unsigned int)(rows*rows)*sizeof(double));
+	
+	for (i=0;i<rows*rows;i++) dblin[i]=(double)in[i];
+	
+	dspec2a(dblin,rows,dbleigenvalues,dbleigenvectors);
+	
+	for (i=0;i<rows*rows;i++) eigenvalues[i]=(float)dbleigenvalues[i];
+	for (i=0;i<rows*rows;i++) eigenvectors[i]=(float)dbleigenvectors[i];
+}