3 files changed, 79 insertions, 0 deletions
diff --git a/src/c/signalProcessing/zpbutt/dzpbutts.c b/src/c/signalProcessing/zpbutt/dzpbutts.c
new file mode 100644
index 0000000..33f22af
--- /dev/null
+++ b/src/c/signalProcessing/zpbutt/dzpbutts.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 2017 - 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: Ankit Raj
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+*/
+#include<stdio.h>
+#include<math.h>
+#include "zpbutt.h"
+#define PI 3.14159265
+double dzpbutts(double n,double fl,doubleComplex* out)
+{
+  double e= PI/(2.0*(n));
+  int k;
+  double rl,cpx,gain;
+  for(k=1;k<=n;k++)
+  {
+    double v=2.0*(double)k+(n)-1.0;
+    rl=(fl)*cos(e*v);
+    cpx=(fl)*sin(e*v);
+    out[k-1]=DoubleComplex(rl,cpx);
+  }
+  gain=pow(fl,n);
+
+return gain;
+  
+}
+
diff --git a/src/c/signalProcessing/zpbutt/int_zpbutt.h b/src/c/signalProcessing/zpbutt/int_zpbutt.h
new file mode 100644
index 0000000..72eae8a
--- /dev/null
+++ b/src/c/signalProcessing/zpbutt/int_zpbutt.h
@@ -0,0 +1,19 @@
+/* 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: Ankit Raj
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+ */
+
+#ifndef __INT_ZPBUTT_H__
+#define __INT_ZPBUTT_H__
+
+#define d0d0zpbuttzada(n,fl,out,gain)  dzpbutts(n,fl,out,gain)
+
+#endif /* !INT_ZPBUTT_H__ */
+
diff --git a/src/c/signalProcessing/zpbutt/zpbutt.h b/src/c/signalProcessing/zpbutt/zpbutt.h
new file mode 100644
index 0000000..6883942
--- /dev/null
+++ b/src/c/signalProcessing/zpbutt/zpbutt.h
@@ -0,0 +1,27 @@
+/* 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: Ankit Raj
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+ */
+
+#ifndef __ZPBUTT_H__
+#define __ZPBUTT_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dzpbutts(double* n,double* fl,doublecomplex* out,double* gain);
+
+#ifdef  __cplusplus
+} /* extern "C" */
+#endif
+