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diff --git a/interfaces/int_norm.h b/interfaces/int_norm.h
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+++ b/interfaces/int_norm.h
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+ /* Copyright (C) 2016 - IIT Bombay - FOSSEE
+
+ 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
+ Author: Siddhesh Wani
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+ */
+
+#ifndef __INT_NORM_H__
+#define __INT_NORM_H__
+
+#include "statMax.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#define d0normd0(in) 	in
+#define s0norms0(in) 	in
+
+#define d2normd0(in,size,out)  ((size[0] == 1) || (size[1]==1))? \
+					dnormv(in, size[0]*size[1], 2): \
+					dnorma(in, size[0], size[1], 2)
+
+#define s2norms0(in,size,out)  ((size[0] == 1) || (size[1]==1))? \
+					snormv(in, size[0]*size[1], 2): \
+					snorma(in, size[0], size[1], 2)
+
+#define d2d0normd0(in,size,norm) ((size[0] == 1) || (size[1]==1))? \
+					dnormv(in,size[0]*size[1],norm) : \
+					dnorma(in,size[0],size[1],norm)
+
+#define s2s0norms0(in,size,norm) ((size[0] == 1) || (size[1]==1))? \
+					snormv(in,size[0]*size[1],norm) : \
+					snorma(in,size[0],size[1],norm)
+
+#define d2g2normd0(in,size,norm,normsize) ((size[0] == 1) || (size[1]==1))? \
+					(norm[0]=='i') ? dmaxa(in,size[0]*size[1]) : dnormv(in,size[0]*size[1],2) : \
+					(norm[0]=='i') ? dnorma(in,size[0],size[1],3) : dnorma(in,size[0],size[1],4)
+
+#define s2g2norms0(in,size,norm,normsize) ((size[0] == 1) || (size[1]==1))? \
+					(norm[0]=='i') ? smaxa(in,size[0]*size[1]) : snormv(in,size[0]*size[1],2) : \
+					(norm[0]=='i') ? snorma(in,size[0],size[1],3) : snorma(in,size[0],size[1],4)
+
+#ifdef  __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*__INT_NORM_H__*/