Functions added - string related and signal processing

4 files changed, 122 insertions, 0 deletions

diff --git a/src/c/elementaryFunctions/Trigonometry/sinc/dsinca.c b/src/c/elementaryFunctions/Trigonometry/sinc/dsinca.c
new file mode 100644
index 0000000..0cd24e9
--- /dev/null
+++ b/src/c/elementaryFunctions/Trigonometry/sinc/dsinca.c
@@ -0,0 +1,46 @@
+/* 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
+ */
+#include<stdio.h>
+#include<math.h>
+#include "sinc.h"
+#define PI 3.14159265358979
+void dsinca(double* sample,int size,double* oup)
+{
+	int j;
+	for(j=0;j<size;j++)
+	{
+	if(sample[j]==0)
+	{
+	oup[j]=1;
+	}
+	else
+	{
+	oup[j]=(sin(sample[j]))/(sample[j]);
+	}
+	}
+}
+/*
+int main()
+{
+	int n;
+	printf("Enter the length of the array");
+	scanf("%d",&n);
+	double arr[100000];
+	int i;
+	printf("Now enter the element of the array");
+	for(i=0;i<n;i++)
+	{
+	scanf("%ld",&arr[i]);
+	}
+	sinc(arr[],n);
+}
+*/
diff --git a/src/c/elementaryFunctions/Trigonometry/sinc/int_sinc.h b/src/c/elementaryFunctions/Trigonometry/sinc/int_sinc.h
new file mode 100644
index 0000000..0dc969d
--- /dev/null
+++ b/src/c/elementaryFunctions/Trigonometry/sinc/int_sinc.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_SINC_H__
+#define __INT_SINC_H__
+
+#define d2sincd2(sample,size,oup) dsinca(sample,size,oup)
+
+#endif /* !__INT_SINC_H__! */
diff --git a/src/c/elementaryFunctions/Trigonometry/sinc/sinc.h b/src/c/elementaryFunctions/Trigonometry/sinc/sinc.h
new file mode 100644
index 0000000..6a5c315
--- /dev/null
+++ b/src/c/elementaryFunctions/Trigonometry/sinc/sinc.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 __SINC_H__
+#define __SINC_H__
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void dsinca(double* sample,int size,double* oup);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* __SINC_H__ */ 
diff --git a/src/c/elementaryFunctions/Trigonometry/sinc/zsinca.c b/src/c/elementaryFunctions/Trigonometry/sinc/zsinca.c
new file mode 100644
index 0000000..ad7d095
--- /dev/null
+++ b/src/c/elementaryFunctions/Trigonometry/sinc/zsinca.c
@@ -0,0 +1,31 @@
+/* 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
+ */
+#include<stdio.h>
+#include<math.h>
+#include "sinc.h"
+#include "sin.h"
+#include "doubleComplex.h"
+void zsinca(doubleComplex* sample,int size,doubleComplex* oup)
+{
+	int j;
+	for(j=0;j<size;j++)
+	{
+	if(sample[j]==0)
+	{
+	oup[j]==DoubleComplex(1,0);
+	}
+	else
+	{
+	oup[j]=zsins(sample[j])/sample[j];
+	}
+	}
+}