Merged Ankit's work, signal processing and string functions

63 files changed, 2249 insertions, 0 deletions

diff --git a/2.3-1/src/c/signalProcessing/%k/dmodka.c b/2.3-1/src/c/signalProcessing/%k/dmodka.c
new file mode 100644
index 00000000..c0630ec0
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%k/dmodka.c
@@ -0,0 +1,97 @@
+#include<stdio.h>
+#include<math.h>
+#include "modk.h"
+double max_calc(double* ptr,int sz)
+{
+	int i=0;
+	double mx;
+	if(ptr[0]<0)
+	{
+	    ptr[0]=-1*ptr[0];
+	}
+	mx=(ptr[0]);
+	//printf("%lf\n",mx);
+	for(i=1;i<sz;i++)
+	{
+	if(ptr[i]<0)
+	{
+	    ptr[i]=-1*ptr[i];
+	}
+	if(mx<(ptr[i]))
+	mx=(ptr[i]);
+	}
+    return mx;
+}
+void dmodka(double* inp,int size,double* oup)
+{
+	double ones[size],PI=M_PI;
+	double eps=pow(2,-52);
+	int i;
+	for(i=0;i<size;i++)
+	{
+	ones[i]=1;
+	}
+	double a[size],b[size],c[size],an[size],bn[size],cn[size],kans[size];
+	
+	int j,kk,l,m;
+	for(j=0;j<size;j++)
+	{
+	a[j]=1;
+	}
+	for(kk=0;kk<size;kk++)
+	{
+	b[kk]=sqrt(ones[kk]-inp[kk]);
+	}
+	for(l=0;l<size;l++)
+	{
+	c[l]=sqrt(inp[l]);
+	
+	}
+	int x=0;
+	//double maxi;
+	//maxi=max_calc(c,size);
+	//printf("%lf",maxi);
+	
+	while(max_calc(c,size)>eps)
+	{
+		int q,w,r;
+		for(q=0;q<size;q++)
+        	{
+		an[q]=0.5*(a[q]+b[q]);
+		}
+		for(w=0;w<size;w++)
+		{
+		bn[w]=sqrt(a[w]*b[w]);
+		}
+		for(r=0;r<size;r++)
+		{
+		cn[r]=0.5*(a[r]-b[r]);
+		}
+		int x,y,z;
+		for(x=0;x<size;x++)
+		{
+		a[x]=an[x];
+		}
+		for(y=0;y<size;y++)
+		{
+		b[y]=bn[y];
+		}
+		for(z=0;z<size;z++)
+		{
+		c[z]=cn[z];
+		}
+	}
+	int q,w;
+	for(q=0;q<size;q++)
+	{
+	oup[q]=PI*(ones[q]/(2*a[q]));
+	}
+	
+}
+/*
+int main()
+{
+	double m[3]={0.1,0.2,0.3};
+	dka(m,3);
+}
+*/
diff --git a/2.3-1/src/c/signalProcessing/%k/int_modk.h b/2.3-1/src/c/signalProcessing/%k/int_modk.h
new file mode 100644
index 00000000..ae09c50a
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%k/int_modk.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_%K_H__
+#define __INT_%K_H__
+
+#define d2modkz2(inp,size,oup) dmodka(inp,size,oup)
+
+#endif /* !INT_%K_H__! */
diff --git a/2.3-1/src/c/signalProcessing/%k/modk.h b/2.3-1/src/c/signalProcessing/%k/modk.h
new file mode 100644
index 00000000..6b4a7e08
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%k/modk.h
@@ -0,0 +1,29 @@
+/* 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
+ */
+
+#ifndef __%K_H__
+#define __%K_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dmodka(double* inp,int size,doubleComplex* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __%K_H__ */
+
diff --git a/2.3-1/src/c/signalProcessing/%sn/dmodsna.c b/2.3-1/src/c/signalProcessing/%sn/dmodsna.c
new file mode 100644
index 00000000..7e1e81c3
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%sn/dmodsna.c
@@ -0,0 +1,24 @@
+/* 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 "modsn.h"
+
+void dmodsna(double* uu,int size,double emmc,double* sn)
+{
+	int i;
+	for(i=0;i<size;i++)
+	{
+	sn[i]=dmodsns(uu[i],emmc);
+	}
+}
+
diff --git a/2.3-1/src/c/signalProcessing/%sn/dmodsns.c b/2.3-1/src/c/signalProcessing/%sn/dmodsns.c
new file mode 100644
index 00000000..06d0a6f0
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%sn/dmodsns.c
@@ -0,0 +1,93 @@
+/* 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
+ Reference:- Abramowitz, Milton and Stegun, Irene A
+             Handbook of Mathematical Functions, Dover, 1965
+             Chapter 16 (Sections 16.4, 16.13 and 16.15)
+	Link for FORTRAN code:-http://www.aip.de/groups/soe/local/numres/bookfpdf/f6-11.pdf
+*/
+
+#include<stdio.h>
+#include<math.h>
+#define CA 0.0003
+#include "modsn.h"
+double dmodsns(double uu, double emmc)
+{
+	double a,b,c,d,emc,u;
+	double em[14],en[14];
+	int i,ii,l,bo;
+	double sn,cn,dn;
+	emc=1-emmc;
+	u=uu;
+	if(emc)
+	{
+	bo=(emc<0.0);
+		if(bo)
+		{
+			d=1.0-emc;
+			emc/=-1.0/d;
+			u*=(d=sqrt(d));
+		}
+		a=1.0;
+		dn=1.0;
+		for(i=1;i<=13;i++)
+		{
+			l=i;
+			em[i]=a;
+			en[i]=(emc=sqrt(emc));
+			c=0.5*(a+emc);
+			if(fabs(a-emc)<=CA*a)break;
+			emc*=a;
+			a=c;
+		}
+		u*=c;
+		sn=sin(u);
+		cn=cos(u);
+		if(sn)
+		{
+			a=cn/sn;
+			c*=a;
+			for(ii=l;ii>=1;ii--)
+			{
+				b=em[ii];
+				a*=c;
+				c*=dn;
+				dn=(en[ii]+a)/(b+a);
+				a=c/b;
+			}
+			a=1.0/sqrt(c*c+1.0);
+			sn=(sn>=0.0?a:-a);
+			cn=c*(sn);
+		}
+		if(bo)
+		{
+			a=dn;
+			dn=cn;
+			cn=a;
+			sn/=d;
+		}
+	}
+	else
+	{
+		cn=1.0/cosh(u);
+		dn=cn;
+		sn=tanh(u);
+	}
+	return sn;
+}
+/*
+int main()
+{
+	double u,k;
+	u=4;
+	k=0.7;
+	sn(u,k);
+}
+*/
diff --git a/2.3-1/src/c/signalProcessing/%sn/int_modsn.h b/2.3-1/src/c/signalProcessing/%sn/int_modsn.h
new file mode 100644
index 00000000..179fb61f
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%sn/int_modsn.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_MODSN_H__
+#define __INT_MODSN_H__
+
+#define d0d0modsnd0(uu,emmc) dmodsns(uu,emmc)
+
+#endif /* !INT_MODSN_H__! */
diff --git a/2.3-1/src/c/signalProcessing/%sn/modsn.h b/2.3-1/src/c/signalProcessing/%sn/modsn.h
new file mode 100644
index 00000000..c5896562
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%sn/modsn.h
@@ -0,0 +1,27 @@
+/* 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
+ */
+
+#ifndef __MODSN_H__
+#define __MODSN_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "c" {
+#endif
+
+double dmodsns(double uu, double emmc);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __MODSN_H__ */
diff --git a/2.3-1/src/c/signalProcessing/%sn/zmodsna.c b/2.3-1/src/c/signalProcessing/%sn/zmodsna.c
new file mode 100644
index 00000000..33052a32
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%sn/zmodsna.c
@@ -0,0 +1,24 @@
+/* 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 "modsn.h"
+#include "doubleComplex.h"
+
+void zmodsna(doubleComplex* uu,int size,double emmc,doubleComplex* sn)
+{
+	int i;
+	for(i=0;i<size;i++)
+	{
+	sn[i]=zmodsns(uu[i],emmc);
+	}
+}
diff --git a/2.3-1/src/c/signalProcessing/%sn/zmodsns.c b/2.3-1/src/c/signalProcessing/%sn/zmodsns.c
new file mode 100644
index 00000000..5f35059f
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/%sn/zmodsns.c
@@ -0,0 +1,161 @@
+/* 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
+ Reference:- Abramowitz, Milton and Stegun, Irene A
+             Handbook of Mathematical Functions, Dover, 1965
+             Chapter 16 (Sections 16.4, 16.13 and 16.15)
+	Link for FORTRAN code:-http://www.aip.de/groups/soe/local/numres/bookfpdf/f6-11.pdf
+*/
+
+#include<stdio.h>
+#include<math.h>
+#include "modsn.h"
+#include "doubleComplex.h"
+#define CA 0.0003
+
+doubleComplex zmodsns(doubleComplex uu,double emmc)
+{
+	doubleComplex ans;
+	double uur,uui;
+	uur=zreals(uu);
+	uui=zimags(uu);
+	double sr,cr,dr;
+        //Performing Elliptic Function operation for the real values
+	double a1,b1,c1,d1,emc1,u1;
+	double em1[14],en1[14];
+	int i1,ii1,l1,bo1;
+	emc1=1-emmc;
+	u1=uur;
+	if(emc1)
+	{
+	bo1=(emc1<0.0);
+		if(bo1)
+		{
+			d1=1.0-emc1;
+			emc1/=-1.0/d1;
+			u1*=(d1=sqrt(d1));
+		}
+		a1=1.0;
+		dr=1.0;
+		for(i1=1;i1<=13;i1++)
+		{
+			l1=i1;
+			em1[i1]=a1;
+			en1[i1]=(emc1=sqrt(emc1));
+			c1=0.5*(a1+emc1);
+			if(fabs(a1-emc1)<=CA*a1)break;
+			emc1*=a1;
+			a1=c1;
+		}
+		u1*=c1;
+		sr=sin(u1);
+		cr=cos(u1);
+		if(sr)
+		{
+			a1=cr/sr;
+			c1*=a1;
+			for(ii1=l1;ii1>=1;ii1--)
+			{
+				b1=em1[ii1];
+				a1*=c1;
+				c1*=dr;
+				dr=(en1[ii1]+a1)/(b1+a1);
+				a1=c1/b1;
+			}
+			a1=1.0/sqrt(c1*c1+1.0);
+			sr=(sr>=0.0?a1:-a1);
+			cr=c1*(sr);
+		}
+		if(bo1)
+		{
+			a1=dr;
+			dr=cr;
+			cr=a1;
+			sr/=d1;
+		}
+	}
+	else
+	{
+		cr=1.0/cosh(u1);
+		dr=cr;
+		sr=tanh(u1);
+	}
+	////////////////////////////////////////////////////////////////
+	double si,ci,di;
+	//Performing Elleptic Function operation for the imaginary values
+	double a,b,c,d,emc,u;
+	double em[14],en[14];
+	int i,ii,l,bo;
+	//double s1,c1,d1;
+	emc=emmc;
+	u=uui;
+	if(emc)
+	{
+	bo=(emc<0.0);
+		if(bo)
+		{
+			d=1.0-emc;
+			emc/=-1.0/d;
+			u*=(d=sqrt(d));
+		}
+		a=1.0;
+		di=1.0;
+		for(i=1;i<=13;i++)
+		{
+			l=i;
+			em[i]=a;
+			en[i]=(emc=sqrt(emc));
+			c=0.5*(a+emc);
+			if(fabs(a-emc)<=CA*a)break;
+			emc*=a;
+			a=c;
+		}
+		u*=c;
+		si=sin(u);
+		ci=cos(u);
+		if(si)
+		{
+			a=ci/si;
+			c*=a;
+			for(ii=l;ii>=1;ii--)
+			{
+				b=em[ii];
+				a*=c;
+				c*=di;
+				di=(en[ii]+a)/(b+a);
+				a=c/b;
+			}
+			a=1.0/sqrt(c*c+1.0);
+			si=(si>=0.0?a:-a);
+			ci=c*(si);
+		}
+		if(bo)
+		{
+			a=di;
+			di=ci;
+			ci=a;
+			si/=d;
+		}
+	}
+	else
+	{
+		ci=1.0/cosh(u);
+		di=ci;
+		si=tanh(u);
+	}
+	/////////////////////////////////////////////////////////
+	double delta;
+	delta=ci*ci + emmc*sr*sr*si*si;
+	double snir,snii;
+	snir=(sr*di)/delta;
+	snii=(cr*dr*si*ci)/delta;
+	ans=DoubleComplex(snir,snii);
+	return ans;	
+}
diff --git a/2.3-1/src/c/signalProcessing/buttmag/buttmag.h b/2.3-1/src/c/signalProcessing/buttmag/buttmag.h
new file mode 100644
index 00000000..47e64af8
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/buttmag/buttmag.h
@@ -0,0 +1,28 @@
+/* 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 __BUTTMAG_H__
+#define __BUTTMAG_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dbuttmags(double order, double omegac, int size, double* sample,double* out);
+
+#ifdef __cplusplus
+} /* extern "C"*/
+#endif
+
+#endif /* __BUTTMAG_H__ */
+
diff --git a/2.3-1/src/c/signalProcessing/buttmag/dbuttmags.c b/2.3-1/src/c/signalProcessing/buttmag/dbuttmags.c
new file mode 100644
index 00000000..dc40e814
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/buttmag/dbuttmags.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 "buttmag.h"
+void dbuttmags(double order, double omegac,double* sample,int size,double* out)
+{
+	double ones[size];
+	int j,k;
+	for(j=0;j<size;j++)
+	{
+	ones[j]=1.0;
+	}
+	//double h[size];
+	for(k=0;k<size;k++)
+	{
+	double x=ones[k]/(ones[k]+pow((sample[k]/omegac),(2*order)));
+	out[k]=x;
+	//printf("%lf\n",h[k]);
+	}
+	
+}
+
diff --git a/2.3-1/src/c/signalProcessing/buttmag/int_buttmag.h b/2.3-1/src/c/signalProcessing/buttmag/int_buttmag.h
new file mode 100644
index 00000000..9867438e
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/buttmag/int_buttmag.h
@@ -0,0 +1,18 @@
+/* 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_BUTTMAG_H__
+#define __INT_BUTTMAG_H__
+
+#define d0d0d2buttmagd2(order,omegac,size,sample,out) dbuttmags(order,omegac,size,sample,out)
+
+#endif /* !INT_BUTTMAG_H__! */
diff --git a/2.3-1/src/c/signalProcessing/buttmag/u8buttmags.c b/2.3-1/src/c/signalProcessing/buttmag/u8buttmags.c
new file mode 100644
index 00000000..e7b52c22
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/buttmag/u8buttmags.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 "buttmag.h"
+void dbuttmags(int order, int omegac,double* sample,int size,double* out)
+{
+	double ones[size];
+	int j,k;
+	for(j=0;j<size;j++)
+	{
+	ones[j]=1.0;
+	}
+	//double h[size];
+	for(k=0;k<size;k++)
+	{
+	double x=ones[k]/(ones[k]+pow((sample[k]/omegac),(2*order)));
+	out[k]=x;
+	//printf("%lf\n",h[k]);
+	}
+	
+}
+
diff --git a/2.3-1/src/c/signalProcessing/cheb1mag/cheb1mag.h b/2.3-1/src/c/signalProcessing/cheb1mag/cheb1mag.h
new file mode 100644
index 00000000..369ee4ce
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/cheb1mag/cheb1mag.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 __CHEB1MAG_H__
+#define __CHEB1MAG_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
+void dcheb1mags(double n, double omegac, double epsilon, double* sample,int size,double* out);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __CHEB1MAG_H__ */
diff --git a/2.3-1/src/c/signalProcessing/cheb1mag/dcheb1mags.c b/2.3-1/src/c/signalProcessing/cheb1mag/dcheb1mags.c
new file mode 100644
index 00000000..a4a459d4
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/cheb1mag/dcheb1mags.c
@@ -0,0 +1,35 @@
+/* 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 "cheb1mag.h"
+void dcheb1mags(double n, double omegac, double epsilon, double* sample,int size,double* out)
+{
+	double x;
+	int j;
+	double tn;
+	for(j=0;j<size;j++)
+	{
+	x=sample[j]/omegac;
+	if(x<=1)
+	{
+	tn=cos(n*acos(x));
+	out[j]=1/(1+(epsilon*epsilon)*(tn*tn));
+	}
+	else
+	{
+	tn=cosh(n*acosh(x));
+	out[j]=1/(1+(epsilon*epsilon)*(tn*tn));
+	}
+	}
+}
+
diff --git a/2.3-1/src/c/signalProcessing/cheb1mag/int_cheb1mag.h b/2.3-1/src/c/signalProcessing/cheb1mag/int_cheb1mag.h
new file mode 100644
index 00000000..fa0ff83e
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/cheb1mag/int_cheb1mag.h
@@ -0,0 +1,18 @@
+/* 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_CHEB1MAG_H__
+#define __INT_CHEB1MAG_H__
+
+#define d0d0d2cheb1magd2(n,omegac,epsilon,sample,size,out) dcheb1mags(n,omegac,epsilon,sample,size,out)
+
+#endif /* !__INT_CHEB1MAG_H__! */
diff --git a/2.3-1/src/c/signalProcessing/cheb2mag/cheb2mag.h b/2.3-1/src/c/signalProcessing/cheb2mag/cheb2mag.h
new file mode 100644
index 00000000..0516ca51
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/cheb2mag/cheb2mag.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 __CHEB2MAG_H__
+#define __CHEB2MAG_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dcheb2mags(double n,double omegar, double A, double* sample,int size,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __CHEB2MAG_H__ */
diff --git a/2.3-1/src/c/signalProcessing/cheb2mag/dcheb2mags.c b/2.3-1/src/c/signalProcessing/cheb2mag/dcheb2mags.c
new file mode 100644
index 00000000..006c5917
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/cheb2mag/dcheb2mags.c
@@ -0,0 +1,49 @@
+/* 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 "cheb2mag.h"
+void dcheb2mags(double n,double omegar, double A, double* sample,int size,double* oup)
+{
+	double e;
+	//e=sqrt(A*A-1);
+	e=1/(pow(10,A/10)-1);
+	double x,k,cn,h,tp;
+	int i;
+	for(i=0;i<size;i++)
+	{
+            x=omegar/sample[i];
+	    if(x<=1)
+	    {
+	        tp=acos(x);
+		cn=cos(n*tp);
+	        if(x==1)
+	        {
+	        h=1/(1+A*A-1);
+		}
+		else
+		{
+	        h=1/(1+((A*A-1)/(cn*cn)));
+		}
+	
+	    }
+	    else
+	    {  
+	        tp=acosh(x);
+		cn=cosh(n*tp);
+		h=e*(cn*cn)/(1+e*(cn*cn));
+	
+	    }
+	oup[i]=h;
+	}
+}
+
diff --git a/2.3-1/src/c/signalProcessing/cheb2mag/int_cheb2mag.h b/2.3-1/src/c/signalProcessing/cheb2mag/int_cheb2mag.h
new file mode 100644
index 00000000..05b77c2d
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/cheb2mag/int_cheb2mag.h
@@ -0,0 +1,18 @@
+/* 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_CHEB2MAG_H__
+#define __INT_CHEB2MAG_H__
+
+#define d0d0d0d2cheb2magd2(n,omegar,A,sample,size,oup) dcheb2mag(n,omegar,A,sample,size,oup)
+
+#endif /* !__INT_CHEB2MAG_H__! */
diff --git a/2.3-1/src/c/signalProcessing/ffilt/ffilt.h b/2.3-1/src/c/signalProcessing/ffilt/ffilt.h
new file mode 100644
index 00000000..9b98f34c
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/ffilt/ffilt.h
@@ -0,0 +1,27 @@
+/* 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
+ */
+
+#ifndef __FFILT_H__
+#define __FFILT_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void gffilts(char* ft,double N,double fc,double fh,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __FFILT_H__ */
diff --git a/2.3-1/src/c/signalProcessing/ffilt/gffilts.c b/2.3-1/src/c/signalProcessing/ffilt/gffilts.c
new file mode 100644
index 00000000..538daf3e
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/ffilt/gffilts.c
@@ -0,0 +1,90 @@
+/* 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 "filt_sinc.h"
+#include "ffilt.h"
+void gffilts(char* ft,int size,double N,double fc,double fh,double* oup)
+{
+	int sz=N;
+	double X[sz];
+	double no22=(N-1)/2;
+	int ino22=(int)no22;
+	if(ft[0]=='l')
+	{
+		dfilt_sincs(N,fc,X);
+		int k=0;
+		for(k=0;k<sz;k++)
+		{
+			oup[k]=X[k];
+		}
+	}
+	else if(ft[0]=='h')
+	{
+		int k=0;
+		dfilt_sincs(N,fc,X);
+		for(k=0;k<sz;k++)
+		{
+			oup[k]=-1*X[k];	
+		}
+		int id=no22;
+		oup[id]=1+oup[id];
+	}
+	else if(ft[0]=='b')
+	{
+		double wc=M_PI*(fh+fc);
+		fc=(fh-fc)/2;
+		dfilt_sincs(N,fc,X);
+		double Y[sz];
+		double k=0;
+		for(k=-no22;k<=no22;k++)	
+		{
+			int ind;
+			ind=k+no22;
+			Y[ind]=2*cos(wc*k);
+		}
+		int j=0;
+		for(j=0;j<sz;j++)
+		{
+			oup[j]=X[j]*Y[j];
+		}
+	}
+	else if(ft[0]=='s')
+	{
+		double wc=M_PI*(fh+fc);
+		fc=(fh-fc)/2;
+		dfilt_sincs(N,fc,X);
+		double Y[sz];
+		double k=0;
+		for(k=-no22;k<=no22;k++)	
+		{
+			int ind;
+			ind=k+no22;
+			Y[ind]=2*cos(wc*k);
+		}
+		int j=0;
+		for(j=0;j<sz;j++)
+		{
+			oup[j]=-1*X[j]*Y[j];
+		}
+		int id=no22;
+		oup[id]=1+oup[id];
+	}
+}
+/*
+int main()
+{
+	string s;
+	int n;
+	double fl,fh;
+}
+*/
diff --git a/2.3-1/src/c/signalProcessing/ffilt/int_ffilt.h b/2.3-1/src/c/signalProcessing/ffilt/int_ffilt.h
new file mode 100644
index 00000000..83f44827
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/ffilt/int_ffilt.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_FFILT_H__
+#define __INT_FFILT_H__
+
+#define g0d0d0d0ffiltd2(ft,N,fc,fh,oup) gffilts(ft,N,fc,fh,oup)
+
+#endif /* !__INT_FFILT_H__! */
diff --git a/2.3-1/src/c/signalProcessing/filt_sinc/dfilt_sincs.c b/2.3-1/src/c/signalProcessing/filt_sinc/dfilt_sincs.c
new file mode 100644
index 00000000..65aaaa65
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/filt_sinc/dfilt_sincs.c
@@ -0,0 +1,58 @@
+/* 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 "filt_sinc.h"
+void dfilt_sincs(double N,double fc,double* oup)
+{
+	double no2=(N-1)/2;
+	int ino2=(int)no2;
+	double wl=fc*2*M_PI;
+	int sz=N;	
+	double xn[sz];
+	double i;
+	int l,m;
+	for(i=-no2;i<=no2;i++)
+	{
+	    l=i+no2;
+	    xn[l]=sin(wl*i);
+	}
+	double xd[sz];
+	double j;
+	printf("\n");
+	for(j=-no2;j<=no2;j++)
+	{
+	    m=j+no2;
+	    xd[m]=M_PI*j;
+	}
+	if(ino2==no2)
+	{
+	xn[(int)no2]=2*fc;
+	xd[(int)no2]=1;
+	}
+	double x[sz];
+	int k;
+	for(k=0;k<N;k++)
+	{
+	oup[k]=xn[k]/xd[k];
+	}
+}
+/*
+int main()
+{
+	int n;
+	double fl;
+	n=5;
+	fl=0.2;
+	filt_sinc(n,fl);
+}
+*/
diff --git a/2.3-1/src/c/signalProcessing/filt_sinc/filt_sinc.h b/2.3-1/src/c/signalProcessing/filt_sinc/filt_sinc.h
new file mode 100644
index 00000000..43b24151
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/filt_sinc/filt_sinc.h
@@ -0,0 +1,28 @@
+/* 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
+ */
+
+#ifndef __FILT_SINC_H__
+#define __FILT_SINC_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void u8filt_sincs(int N,double fc,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __FILT_SINC_H */
+
diff --git a/2.3-1/src/c/signalProcessing/filt_sinc/int_filt_sinc.h b/2.3-1/src/c/signalProcessing/filt_sinc/int_filt_sinc.h
new file mode 100644
index 00000000..5b7b07ae
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/filt_sinc/int_filt_sinc.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_FILT_SINC_H__
+#define __INT_FILT_SINC_H__
+
+#define u80d0filt_sincd2(N,fc,oup) u8filt_sincs(N,fc,oup)
+
+#endif /* !__INT_FILT_SINC_H__! */
diff --git a/2.3-1/src/c/signalProcessing/fsfirlin/dfsfirlina.c b/2.3-1/src/c/signalProcessing/fsfirlin/dfsfirlina.c
new file mode 100644
index 00000000..d2079f4d
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/fsfirlin/dfsfirlina.c
@@ -0,0 +1,144 @@
+/* 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 "sincd.h"
+#include "fsfirlin.h"
+//#define PI 3.14159265358979
+
+void dfsfirlina(double* hd,int size,double flag,double* hst)
+{
+	int n1=size,n;
+	if( n1%2==0)
+	{
+	n=2*n1;
+	}
+	else
+	{
+	n=2*n1+1;
+	}
+	double scd[8*n+1];
+	//STRAT SINCD
+	double npt=4*n;
+	int sz=4*n;
+	double PI=M_PI;
+	double pas=PI/npt;
+	double om[sz+1];
+	int i;
+	for(i=0;i<=sz;i++)
+	{
+	om[i]=i*pas;
+	}
+	double eps=pow(-1,(n-1));
+	double s1[sz+1],s2[sz+1];
+	double s[2*(sz)+1];
+	double sr[2*(sz)+1];
+	if(flag==1)
+	{
+	int j,k;
+	for(j=0;j<=4*n;j++)
+	{
+	s1[j]=sin(n*om[j]);
+	s2[j]=sin(om[j]);
+	}
+	s1[0]=n;
+	s2[0]=1;
+	s1[sz]=n*eps;
+	s2[sz]=1;
+	
+	for(k=0;k<=4*n;k++)
+	{
+	s[k]=s1[k]/s2[k];
+	}
+	
+	int x;
+	for(x=0;x<=4*n;x++)
+	{
+	    scd[sz-x]=s[x];
+	}
+	int l;
+	for(l=4*n+1;l<=8*n;l++)
+	{
+	scd[l]=s[l-(sz)];
+	}
+	int m;
+	for(m=0;m<=8*n;m++)
+	{
+	scd[m]=scd[m]/n;
+	}
+	}
+	else
+	{
+	int a;
+	for(a=0;a<=4*n;a++)
+	{
+	om[a]=om[a]-(PI/(2*n));
+	}
+	int j,k;
+	for(j=0;j<=4*n;j++)
+	{
+	s1[j]=sin(n*om[j]);
+	s2[j]=sin(om[j]);
+	}
+	s1[2]=n;
+	s2[2]=1;
+	for(k=0;k<=4*n;k++)
+	{
+	s[k]=s1[k]/s2[k];
+	}
+	int m;
+	for(m=0;m<=4*n;m++)
+	{
+	scd[m]=(eps*s[m])/n;
+	}
+	int l;
+	for(l=4*n+1;l<=8*n;l++)
+	{
+	scd[l]=s[l-(sz)]/n;
+	}
+	}
+	//END SINCD
+	int ii;
+	for(ii=4*n;ii<=6*n;ii++)
+	{
+	hst[ii-(4*n)]=hd[0]*scd[ii];
+	}
+	
+	int epsi;
+	epsi=pow(-1,n-1);
+	int jj;
+	for(jj=1;jj<=(n1-1);jj++)
+	{
+	double tp1[2*n+1];
+	double tp2[2*n+1];
+	int k,l;
+	for(k=(-4*jj+4*n);k<=(-4*jj+6*n);k++)
+	{
+	tp1[k-(-4*jj+4*n)]=hd[jj]*scd[k];
+	}
+	
+	for(l=(4*jj);l<=(4*jj+2*n);l++)
+	{
+	tp2[l-(4*jj)]=hd[jj]*(epsi*scd[l]);
+	}
+	int m;
+	for(m=0;m<=2*n;m++)
+	{
+	hst[m]=hst[m]+(tp1[m]+tp2[m]);
+	}
+	
+	}
+		
+	
+}
diff --git a/2.3-1/src/c/signalProcessing/fsfirlin/fsfirlin.h b/2.3-1/src/c/signalProcessing/fsfirlin/fsfirlin.h
new file mode 100644
index 00000000..7337cbfe
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/fsfirlin/fsfirlin.h
@@ -0,0 +1,26 @@
+/* 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 __FSFIRLIN_H__
+#define __FSFIRLIN_H__
+#include "types.h"
+#include "sincd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dfsfirlina(double* hd,int size,int flag,double* hst);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
diff --git a/2.3-1/src/c/signalProcessing/fsfirlin/int_fsfirlin.h b/2.3-1/src/c/signalProcessing/fsfirlin/int_fsfirlin.h
new file mode 100644
index 00000000..857dae8c
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/fsfirlin/int_fsfirlin.h
@@ -0,0 +1,18 @@
+/* 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_FSFIRLIN_H__
+#define __INT_FSFIRLIN_H__
+
+#define d2u80fsfirlind2(hd,size,flag,hst) dfsfirlina(hd,size[1],flag,hst)
+
+#endif /* !__INT_FSFIRLIN_H__! */
diff --git a/2.3-1/src/c/signalProcessing/includes/buttmag.h b/2.3-1/src/c/signalProcessing/includes/buttmag.h
new file mode 100644
index 00000000..ef17b7ea
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/buttmag.h
@@ -0,0 +1,29 @@
+/* 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
+ */
+
+#ifndef __BUTTMAG_H__
+#define __BUTTMAG_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dbuttmags(double order, double omegac, double* sample, int size,double* out);
+void u8buttmags(int order, int omegac, double* sample, int size,double* out);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __BUTTMAG_H__ */
+
diff --git a/2.3-1/src/c/signalProcessing/includes/cheb1mag.h b/2.3-1/src/c/signalProcessing/includes/cheb1mag.h
new file mode 100644
index 00000000..369ee4ce
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/cheb1mag.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 __CHEB1MAG_H__
+#define __CHEB1MAG_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
+void dcheb1mags(double n, double omegac, double epsilon, double* sample,int size,double* out);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __CHEB1MAG_H__ */
diff --git a/2.3-1/src/c/signalProcessing/includes/cheb2mag.h b/2.3-1/src/c/signalProcessing/includes/cheb2mag.h
new file mode 100644
index 00000000..0516ca51
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/cheb2mag.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 __CHEB2MAG_H__
+#define __CHEB2MAG_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dcheb2mags(double n,double omegar, double A, double* sample,int size,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __CHEB2MAG_H__ */
diff --git a/2.3-1/src/c/signalProcessing/includes/ffilt.h b/2.3-1/src/c/signalProcessing/includes/ffilt.h
new file mode 100644
index 00000000..f38df6e6
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/ffilt.h
@@ -0,0 +1,27 @@
+/* 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
+ */
+
+#ifndef __FFILT_H__
+#define __FFILT_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void gffilts(char* ft,int size,double N,double fc,double fh,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __FFILT_H__ */
diff --git a/2.3-1/src/c/signalProcessing/includes/filt_sinc.h b/2.3-1/src/c/signalProcessing/includes/filt_sinc.h
new file mode 100644
index 00000000..095ca91f
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/filt_sinc.h
@@ -0,0 +1,28 @@
+/* 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
+ */
+
+#ifndef __FILT_SINC_H__
+#define __FILT_SINC_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dfilt_sincs(double N,double fc,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __FILT_SINC_H */
+
diff --git a/2.3-1/src/c/signalProcessing/includes/fsfirlin.h b/2.3-1/src/c/signalProcessing/includes/fsfirlin.h
new file mode 100644
index 00000000..cf5fbbd0
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/fsfirlin.h
@@ -0,0 +1,28 @@
+/* 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
+ */
+
+#ifndef __FSFIRLIN_H__
+#define __FSFIRLIN_H__
+#include "types.h"
+#include "sincd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dfsfirlina(double* hd,int size,double flag,double* hst);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*__FSFIRLIN_H__*/
diff --git a/2.3-1/src/c/signalProcessing/includes/modsn.h b/2.3-1/src/c/signalProcessing/includes/modsn.h
new file mode 100644
index 00000000..d91dd9d3
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/modsn.h
@@ -0,0 +1,31 @@
+/* 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
+ */
+
+#ifndef __MODSN_H__
+#define __MODSN_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+double dmodsns(double uu, double emmc);
+doubleComplex zmodsns(doubleComplex uu,double emmc);
+void dmodsna(double* uu,int size,double emmc,double* sn);
+void zmodsna(doubleComplex* uu,int size,double emmc,doubleComplex* sn);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __MODSN_H__ */
diff --git a/2.3-1/src/c/signalProcessing/includes/sincd.h b/2.3-1/src/c/signalProcessing/includes/sincd.h
new file mode 100644
index 00000000..9b7a3607
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/sincd.h
@@ -0,0 +1,29 @@
+/* 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 __SINCD_H__
+#define __SINCD_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dsincds(double n,double flg,double* oup);
+void u8sincds(int n,int flg,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __SINCD_H__ */
+
diff --git a/2.3-1/src/c/signalProcessing/includes/zpbutt.h b/2.3-1/src/c/signalProcessing/includes/zpbutt.h
new file mode 100644
index 00000000..9eb88ad4
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/zpbutt.h
@@ -0,0 +1,29 @@
+/* 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
+
+double dzpbutts(double n,double fl,doubleComplex* out);
+
+#ifdef  __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __ZPBUTT_H__ */
+
diff --git a/2.3-1/src/c/signalProcessing/includes/zpch1.h b/2.3-1/src/c/signalProcessing/includes/zpch1.h
new file mode 100644
index 00000000..fbe850cc
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/zpch1.h
@@ -0,0 +1,28 @@
+/* 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 __ZPCH1_H__
+#define __ZPCH1_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+double dzpch1s(double N,double e,double wc,doubleComplex* out);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __ZPCH1_H__ */
diff --git a/2.3-1/src/c/signalProcessing/includes/zpch2.h b/2.3-1/src/c/signalProcessing/includes/zpch2.h
new file mode 100644
index 00000000..d7c1c647
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/includes/zpch2.h
@@ -0,0 +1,28 @@
+/* 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 __ZPCH2_H__
+#define __ZPCH2_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+double dzpch2s(double N, double A, double omegar,doubleComplex* zeros,doubleComplex* poles);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __ZPCH2_H__ */ 
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_buttmag.h b/2.3-1/src/c/signalProcessing/interfaces/int_buttmag.h
new file mode 100644
index 00000000..4a33fafe
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_buttmag.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_BUTTMAG_H__
+#define __INT_BUTTMAG_H__
+
+#define d0d0d2buttmagd2(order,omegac,sample,size,out) dbuttmags(order,omegac,sample,size[1],out)
+#define u80u80d2buttmagd2(order,omegac,sample,size,out) u8buttmags(order,omegac,sample,size[1],out)
+
+#endif /* !INT_BUTTMAG_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_cheb1mag.h b/2.3-1/src/c/signalProcessing/interfaces/int_cheb1mag.h
new file mode 100644
index 00000000..764e8c79
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_cheb1mag.h
@@ -0,0 +1,18 @@
+/* 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_CHEB1MAG_H__
+#define __INT_CHEB1MAG_H__
+
+#define d0d0d0d2cheb1magd2(n,omegac,epsilon,sample,size,out) dcheb1mags(n,omegac,epsilon,sample,size[1],out)
+
+#endif /* !__INT_CHEB1MAG_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_cheb2mag.h b/2.3-1/src/c/signalProcessing/interfaces/int_cheb2mag.h
new file mode 100644
index 00000000..b63db04d
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_cheb2mag.h
@@ -0,0 +1,18 @@
+/* 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_CHEB2MAG_H__
+#define __INT_CHEB2MAG_H__
+
+#define d0d0d0d2cheb2magd2(n,omegar,A,sample,size,oup) dcheb2mags(n,omegar,A,sample,size[1],oup)
+
+#endif /* !__INT_CHEB2MAG_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_ffilt.h b/2.3-1/src/c/signalProcessing/interfaces/int_ffilt.h
new file mode 100644
index 00000000..273b98f7
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_ffilt.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_FFILT_H__
+#define __INT_FFILT_H__
+
+#define g2d0d0d0ffiltd2(ft,size,N,fc,fh,oup) gffilts(ft,size[1],N,fc,fh,oup)
+
+#endif /* !__INT_FFILT_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_filt_sinc.h b/2.3-1/src/c/signalProcessing/interfaces/int_filt_sinc.h
new file mode 100644
index 00000000..f90d0a62
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_filt_sinc.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_FILT_SINC_H__
+#define __INT_FILT_SINC_H__
+
+#define d0d0filt_sincd2(N,fc,oup) dfilt_sincs(N,fc,oup)
+
+#endif /* !__INT_FILT_SINC_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_fsfirlin.h b/2.3-1/src/c/signalProcessing/interfaces/int_fsfirlin.h
new file mode 100644
index 00000000..3f6fb6e0
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_fsfirlin.h
@@ -0,0 +1,18 @@
+/* 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
+ */
+
+#ifndef __INT_FSFIRLIN_H__
+#define __INT_FSFIRLIN_H__
+
+#define d2d0fsfirlind2(hd,size,flag,hst) dfsfirlina(hd,size[1],flag,hst)
+
+#endif /* !__INT_FSFIRLIN_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_modsn.h b/2.3-1/src/c/signalProcessing/interfaces/int_modsn.h
new file mode 100644
index 00000000..0d32eb06
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_modsn.h
@@ -0,0 +1,21 @@
+/* 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
+ */
+
+#ifndef __INT_MODSN_H__
+#define __INT_MODSN_H__
+
+#define d0d0modsnd0(uu,emmc) dmodsns(uu,emmc)
+#define z0d0modsnz0(uu,emmc) zmodsns(uu,emmc)
+#define d2d0modsnd2(uu,size,emmc,sn) dmodsna(uu,size[1],emmc,sn)
+#define z2d0modsnz2(uu,size,emmc,sn) zmodsna(uu,size[1],emmc,sn)
+
+#endif /* !INT_MODSN_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_sincd.h b/2.3-1/src/c/signalProcessing/interfaces/int_sincd.h
new file mode 100644
index 00000000..73136730
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_sincd.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_SINCD_H__
+#define __INT_SINCD_H__
+
+#define d0d0sincdd2(n,flg,oup) dsincds(n,flg,oup)
+#define u80u80sincdd2(n,flg,oup) u8sincds(n,flg,oup)
+
+#endif /* !__INT_SINCD_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_zpbutt.h b/2.3-1/src/c/signalProcessing/interfaces/int_zpbutt.h
new file mode 100644
index 00000000..775c1026
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_zpbutt.h
@@ -0,0 +1,19 @@
+/* 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
+ */
+
+#ifndef __INT_ZPBUTT_H__
+#define __INT_ZPBUTT_H__
+
+#define d0d0zpbuttz2d0(n,fl,out)  dzpbutts(n,fl,out)
+
+#endif /* !INT_ZPBUTT_H__! */
+
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_zpch1.h b/2.3-1/src/c/signalProcessing/interfaces/int_zpch1.h
new file mode 100644
index 00000000..429e7c36
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_zpch1.h
@@ -0,0 +1,18 @@
+/* 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_ZPCH1_H__
+#define __INT_ZPCH1_H__
+
+#define d0d0d0zpch1z2d0(N,e,wc,out) dzpch1s(N,e,wc,out)
+
+#endif /* !INT_ZPCH1_H__! */
diff --git a/2.3-1/src/c/signalProcessing/interfaces/int_zpch2.h b/2.3-1/src/c/signalProcessing/interfaces/int_zpch2.h
new file mode 100644
index 00000000..fcb12a7c
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/interfaces/int_zpch2.h
@@ -0,0 +1,18 @@
+/* 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_ZPCH2_H__
+#define __INT_ZPCH2_H__
+
+#define d0d0d0zpch2z2z2d0(N,A,omegar,zeros,poles) dzpch2s(N,A,omegar,zeros,poles)
+
+#endif /* !INT_ZPCH2_H__! */
diff --git a/2.3-1/src/c/signalProcessing/sincd/dsincds.c b/2.3-1/src/c/signalProcessing/sincd/dsincds.c
new file mode 100644
index 00000000..1475d8de
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/sincd/dsincds.c
@@ -0,0 +1,99 @@
+/* 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 "sincd.h"
+//#define PI 3.14159265358979
+void dsincds(double n,double flg,double* oup)
+{
+	double npt=4*n;
+	int sz=4*n;
+	double PI=M_PI;
+	double pas=PI/npt;
+	double om[sz+1];
+	int i;
+	for(i=0;i<=sz;i++)
+	{
+	om[i]=i*pas;
+	}
+	double eps=pow(-1,(n-1));
+	double s1[sz+1],s2[sz+1];
+	double s[2*(sz)+1];
+	double sr[2*(sz)+1];
+	if(flg==1)
+	{
+	int j,k;
+	for(j=0;j<=4*n;j++)
+	{
+	s1[j]=sin(n*om[j]);
+	s2[j]=sin(om[j]);
+	}
+	s1[0]=n;
+	s2[0]=1;
+	s1[sz]=n*eps;
+	s2[sz]=1;
+	
+	for(k=0;k<=4*n;k++)
+	{
+	s[k]=s1[k]/s2[k];
+	}
+	
+	int x;
+	for(x=0;x<=4*n;x++)
+	{
+	    oup[sz-x]=s[x];
+	}
+	int l;
+	for(l=4*n+1;l<=8*n;l++)
+	{
+	oup[l]=s[l-(sz)];
+	}
+	int m;
+	for(m=0;m<=8*n;m++)
+	{
+	oup[m]=oup[m]/n;
+	}
+	}
+	else
+	{
+	int a;
+	for(a=0;a<=4*n;a++)
+	{
+	om[a]=om[a]-(PI/(2*n));
+	}
+	int j,k;
+	for(j=0;j<=4*n;j++)
+	{
+	s1[j]=sin(n*om[j]);
+	s2[j]=sin(om[j]);
+	}
+	s1[2]=n;
+	s2[2]=1;
+	for(k=0;k<=4*n;k++)
+	{
+	s[k]=s1[k]/s2[k];
+	}
+	int m;
+	for(m=0;m<=4*n;m++)
+	{
+	oup[m]=(eps*s[m])/n;
+	}
+	int l;
+	for(l=4*n+1;l<=8*n;l++)
+	{
+	oup[l]=s[l-(sz)]/n;
+	}
+	
+	}
+}
+
diff --git a/2.3-1/src/c/signalProcessing/sincd/int_sincd.h b/2.3-1/src/c/signalProcessing/sincd/int_sincd.h
new file mode 100644
index 00000000..a404978b
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/sincd/int_sincd.h
@@ -0,0 +1,18 @@
+/* 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_SINCD_H__
+#define __INT_SINCD_H__
+
+#define u80sincdd2(n,flg,oup) u8sincds(n,flg,oup)
+
+#endif /* !__INT_SINCD_H__! */
diff --git a/2.3-1/src/c/signalProcessing/sincd/sincd.h b/2.3-1/src/c/signalProcessing/sincd/sincd.h
new file mode 100644
index 00000000..2df85a87
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/sincd/sincd.h
@@ -0,0 +1,28 @@
+/* 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 __SINCD_H__
+#define __SINCD_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void u8sincds(int n,int flg,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __SINCD_H__ */
+
diff --git a/2.3-1/src/c/signalProcessing/sincd/u8sincds.c b/2.3-1/src/c/signalProcessing/sincd/u8sincds.c
new file mode 100644
index 00000000..d03f48ae
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/sincd/u8sincds.c
@@ -0,0 +1,98 @@
+/* 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 "sincd.h"
+#define PI 3.14159265358979
+void u8sincds(int n,int flg,double* oup)
+{
+	double npt=4*n;
+	int sz=4*n;
+	double pas=PI/npt;
+	double om[sz+1];
+	int i;
+	//om[0]=0;
+	for(i=0;i<=sz;i++)
+	{
+	om[i]=i*pas;
+	}
+	double eps=pow(-1,(n-1));
+	double s1[sz+1],s2[sz+1];
+	double s[2*(sz)+1];
+	double sr[2*(sz)+1];
+	if(flg==1)
+	{
+	int j,k;
+	for(j=0;j<=4*n;j++)
+	{
+	s1[j]=sin(n*om[j]);
+	s2[j]=sin(om[j]);
+	}
+	s1[0]=n;
+	s2[0]=1;
+	s1[sz]=n*eps;
+	s2[sz]=1;
+	
+	for(k=0;k<=4*n;k++)
+	{
+	s[k]=s1[k]/s2[k];
+	}
+	
+	int x;
+	for(x=0;x<=4*n;x++)
+	{
+	    oup[sz-x]=s[x];
+	}
+	int l;
+	for(l=4*n+1;l<=8*n;l++)
+	{
+	oup[l]=s[l-(sz)];
+	}
+	int m;
+	for(m=0;m<=8*n;m++)
+	{
+	oup[m]=oup[m]/n;
+	}
+	}
+	else
+	{
+	int a;
+	for(a=0;a<=4*n;a++)
+	{
+	om[a]=om[a]-(PI/(2*n));
+	}
+	int j,k;
+	for(j=0;j<=4*n;j++)
+	{
+	s1[j]=sin(n*om[j]);
+	s2[j]=sin(om[j]);
+	}
+	s1[2]=n;
+	s2[2]=1;
+	for(k=0;k<=4*n;k++)
+	{
+	s[k]=s1[k]/s2[k];
+	}
+	int m;
+	for(m=0;m<=4*n;m++)
+	{
+	oup[m]=(eps*s[m])/n;
+	}
+	int l;
+	for(l=4*n+1;l<=8*n;l++)
+	{
+	oup[l]=s[l-(sz)]/n;
+	}
+	
+	}
+}
diff --git a/2.3-1/src/c/signalProcessing/zpbutt/dzpbutts.c b/2.3-1/src/c/signalProcessing/zpbutt/dzpbutts.c
new file mode 100644
index 00000000..33f22af9
--- /dev/null
+++ b/2.3-1/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/2.3-1/src/c/signalProcessing/zpbutt/int_zpbutt.h b/2.3-1/src/c/signalProcessing/zpbutt/int_zpbutt.h
new file mode 100644
index 00000000..72eae8a2
--- /dev/null
+++ b/2.3-1/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/2.3-1/src/c/signalProcessing/zpbutt/zpbutt.h b/2.3-1/src/c/signalProcessing/zpbutt/zpbutt.h
new file mode 100644
index 00000000..6883942c
--- /dev/null
+++ b/2.3-1/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
+
diff --git a/2.3-1/src/c/signalProcessing/zpch1/dzpch1s.c b/2.3-1/src/c/signalProcessing/zpch1/dzpch1s.c
new file mode 100644
index 00000000..ab7b6332
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/zpch1/dzpch1s.c
@@ -0,0 +1,53 @@
+/* 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 "zpch1.h"
+#include "multiplication.h"
+#include "conj.h"
+#include "abs.h"
+#define PI 3.14159265
+double dzpch1s(double N,double e,double wc,doubleComplex* out)
+{
+	doubleComplex accumulate,tp;
+      double B,r,R,gain,realVal;
+      double temp=sqrt(1+e*e);
+    
+    B=pow((temp+1)/e,1/N);
+    
+    r=wc*((B*B-1)/(2*B));
+    R=wc*((B*B+1)/(2*B));
+    
+    int k;
+	double t1=1;
+	double t2=0;
+	accumulate=DoubleComplex(t1,t2);
+    for(k=0;k<N;k++)
+    {
+      double theta;
+    theta=(PI/2)+((2*k+1)*PI)/(2*N);
+      double xk,yk;
+    xk=r*cos(theta);
+    yk=R*sin(theta);
+    out[k]=DoubleComplex(xk,yk);
+	tp=DoubleComplex(xk,yk);
+    accumulate=zmuls(accumulate,tp);
+    }
+	
+    realVal=zreals(accumulate);
+	gain=dabss(realVal);
+    if (N==2*(int)(N/2)) 
+            gain=gain/sqrt(1+e*e);
+return gain;
+		
+}
+
diff --git a/2.3-1/src/c/signalProcessing/zpch1/int_zpch1.h b/2.3-1/src/c/signalProcessing/zpch1/int_zpch1.h
new file mode 100644
index 00000000..8933d1a2
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/zpch1/int_zpch1.h
@@ -0,0 +1,18 @@
+/* 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_ZPCH1_H__
+#define __INT_ZPCH1_H__
+
+#define d0d0d0zpch1z2d0(N,e,wc) dzpch1s(N,e,wc)
+
+#endif /* !INT_ZPCH1_H__! */
diff --git a/2.3-1/src/c/signalProcessing/zpch1/zpch1.h b/2.3-1/src/c/signalProcessing/zpch1/zpch1.h
new file mode 100644
index 00000000..fbe850cc
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/zpch1/zpch1.h
@@ -0,0 +1,28 @@
+/* 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 __ZPCH1_H__
+#define __ZPCH1_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+double dzpch1s(double N,double e,double wc,doubleComplex* out);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __ZPCH1_H__ */
diff --git a/2.3-1/src/c/signalProcessing/zpch2/dzpch2s.c b/2.3-1/src/c/signalProcessing/zpch2/dzpch2s.c
new file mode 100644
index 00000000..22a46a64
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/zpch2/dzpch2s.c
@@ -0,0 +1,63 @@
+/* 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 "zpch2.h"
+#include "multiplication.h"
+#include "abs.h"
+#include "division.h"
+#define PI 3.14159265
+double dzpch2s(double N, double A, double omegar,doubleComplex* zeros,doubleComplex* poles) 
+{
+	int k,j;
+	double e,xk,realVal,gain;
+	doubleComplex accumulate1,accumulate2,tp1,tp2;
+	accumulate1=DoubleComplex(1,0);	
+	accumulate2=DoubleComplex(1,0);
+	int ct=0;
+	for(k=1;k<=N;k++)
+	{
+	if(k!=((N+1)/2))
+	{
+	ct++;
+	double num=PI*(2*k-1);
+	double den=2*N;
+	 xk=cos(num/den);
+	double sk=omegar/xk;
+	zeros[k-1]=DoubleComplex(0,sk);
+	tp1=DoubleComplex(0,sk);
+	accumulate1=zmuls(accumulate1,tp1);
+	}	
+	}
+	for(j=1;j<=N;j++)
+	{
+	double num=PI*(2*j-1);
+	double den=2*N;
+	double xk1=num/den;
+	double Gamma=pow((A+sqrt(A*A-1)),(1/N));
+	double alpha=-((Gamma-1/Gamma)/2)*sin(xk1);
+    	double Beta=((Gamma+1/Gamma)/2)*cos(xk1);
+    	double normal=alpha*alpha+Beta*Beta;
+    	poles[j-1]=DoubleComplex((omegar*alpha)/normal,(omegar*Beta)/normal);
+	tp2=DoubleComplex((omegar*alpha)/normal,(omegar*Beta)/normal);
+	accumulate2=zmuls(accumulate2,tp2);
+	}
+	double qt;
+	double ra2=zreals(accumulate2);
+	double ra1=zreals(accumulate1);	
+	qt=dldivs(ra1,ra2);
+	gain=dabss(qt);
+	
+	return gain;
+	
+}
+
diff --git a/2.3-1/src/c/signalProcessing/zpch2/int_zpch2.h b/2.3-1/src/c/signalProcessing/zpch2/int_zpch2.h
new file mode 100644
index 00000000..683a7614
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/zpch2/int_zpch2.h
@@ -0,0 +1,18 @@
+/* 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_ZPCH2_H__
+#define __INT_ZPCH2_H__
+
+#define d0d0d0zpch2z2z2(N,A,omegar,zeros,poles) dzpch2s(N,A,omegar,zeros,poles)
+
+#endif /* !INT_ZPCH2_H__! */
diff --git a/2.3-1/src/c/signalProcessing/zpch2/zpch2.h b/2.3-1/src/c/signalProcessing/zpch2/zpch2.h
new file mode 100644
index 00000000..0d191d5c
--- /dev/null
+++ b/2.3-1/src/c/signalProcessing/zpch2/zpch2.h
@@ -0,0 +1,28 @@
+/* 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 __ZPCH2_H__
+#define __ZPCH2_H__
+#include "types.h"
+#include "doubleComplex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dzpch2s(double N, double A, double omegar,doubleComplex* zeros,doubleComplex* poles);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __ZPCH2_H__ */