Functions added - string related and signal processing

3 files changed, 144 insertions, 0 deletions

diff --git a/src/c/signalProcessing/%k/dmodka.c b/src/c/signalProcessing/%k/dmodka.c
new file mode 100644
index 0000000..c0630ec
--- /dev/null
+++ b/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/src/c/signalProcessing/%k/int_modk.h b/src/c/signalProcessing/%k/int_modk.h
new file mode 100644
index 0000000..ae09c50
--- /dev/null
+++ b/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/src/c/signalProcessing/%k/modk.h b/src/c/signalProcessing/%k/modk.h
new file mode 100644
index 0000000..6b4a7e0
--- /dev/null
+++ b/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__ */
+