From db464f35f5a10b58d9ed1085e0b462689adee583 Mon Sep 17 00:00:00 2001
From: Siddhesh Wani
Date: Mon, 25 May 2015 14:46:31 +0530
Subject: Original Version

---
 src/c/matrixOperations/determ/cdeterma.c | 150 +++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 src/c/matrixOperations/determ/cdeterma.c

(limited to 'src/c/matrixOperations/determ/cdeterma.c')

diff --git a/src/c/matrixOperations/determ/cdeterma.c b/src/c/matrixOperations/determ/cdeterma.c
new file mode 100644
index 0000000..6f2d1e8
--- /dev/null
+++ b/src/c/matrixOperations/determ/cdeterma.c
@@ -0,0 +1,150 @@
+/*
+ *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+ *  Copyright (C) 2008 - INRIA - Arnaud TORSET
+ *
+ *  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
+ *
+ */
+
+#include <stdlib.h>
+#ifndef WITHOUT_LAPACK
+#include "lapack.h"
+#else
+#include "division.h"
+#endif
+
+#include "determ.h"
+#include "multiplication.h"
+#include "subtraction.h"
+#include "addition.h"
+
+
+
+floatComplex cdeterma(floatComplex *in, int size){
+#ifndef WITHOUT_LAPACK
+	int i=0,info=0;
+	doubleComplex *inCopy,out_tmp;
+	int *vectPivot;
+	floatComplex out, tmp1,tmp2;
+
+
+	/*Calculation of the determinant*/
+	switch(size){
+		case 2 : out = cdiffs(cmuls(in[0],in[3]),cmuls(in[1],in[2]));
+			 break;
+		case 3 : /*regle de Sarrus*/
+			 out=FloatComplex(0,0);
+			 /*Addition part*/
+			 tmp1 =  cmuls(in[0],in[4]);
+			 tmp2 = cmuls(tmp1,in[8]);
+			 out = cadds(out,tmp2);
+			 tmp1 =  cmuls(in[1],in[5]);
+			 tmp2 = cmuls(tmp1,in[6]);
+			 out = cadds(out,tmp2);
+			 tmp1 =  cmuls(in[2],in[3]);
+			 tmp2 = cmuls(tmp1,in[7]);
+			 out = cadds(out,tmp2);
+			 /*Subtraction part*/			 
+			 tmp1 =  cmuls(in[0],in[5]);
+			 tmp2 = cmuls(tmp1,in[7]);
+			 out = cdiffs(out,tmp2);
+			 tmp1 =  cmuls(in[1],in[3]);
+			 tmp2 = cmuls(tmp1,in[8]);
+			 out = cdiffs(out,tmp2);
+			 tmp1 =  cmuls(in[2],in[4]);
+			 tmp2 = cmuls(tmp1,in[6]);
+			 out = cdiffs(out,tmp2);
+			 break;
+			 
+		default : 
+		
+		
+			  /*We must have a doubleComplex matrix cause
+			    zgetrf accept only double parameters*/
+			    	
+			  /*Copy the input matrix*/
+			  inCopy=(doubleComplex*)malloc((unsigned int)(size*size)*sizeof(doubleComplex));
+			  for (i=0;i<size*size;i++){
+			  	inCopy[i]=DoubleComplex((double)creals(in[i]),(double)cimags(in[i]));
+			  }
+
+
+
+			  vectPivot=(int*)malloc((unsigned int)size*sizeof(int));
+			  zgetrf_  ( &size, &size, inCopy, &size, vectPivot, &info);
+						
+			  out_tmp=DoubleComplex(1,0);
+			  for (i=0;i<size;i++){
+			  	if (vectPivot[i]!=i+1) out_tmp=DoubleComplex(-zreals(out_tmp),-zimags(out_tmp));
+			  	out_tmp=zmuls(inCopy[i*(size+1)],out_tmp);
+			  }
+			  out=FloatComplex((float)zreals(out_tmp),(float)zimags(out_tmp));
+
+			  free(vectPivot);
+			  free(inCopy);
+	}
+#else
+	int i=0,j=0,k=0;
+	floatComplex *inCopy;
+	floatComplex tmp1,tmp2;
+	floatComplex pivot;
+	floatComplex out;
+	
+		
+	switch(size){
+		case 2 : out = cdiffs(cmuls(in[0],in[3]),cmuls(in[1],in[2]));
+			 break;
+		case 3 : /*regle de Sarrus*/
+			 out=FloatComplex(0,0);
+			 /*Addition part*/
+			 tmp1 =  cmuls(in[0],in[4]);
+			 tmp2 = cmuls(tmp1,in[8]);
+			 out = cadds(out,tmp2);
+			 tmp1 =  cmuls(in[1],in[5]);
+			 tmp2 = cmuls(tmp1,in[6]);
+			 out = cadds(out,tmp2);
+			 tmp1 =  cmuls(in[2],in[3]);
+			 tmp2 = cmuls(tmp1,in[7]);
+			 out = cadds(out,tmp2);
+			 /*Subtraction part*/			 
+			 tmp1 =  cmuls(in[0],in[5]);
+			 tmp2 = cmuls(tmp1,in[7]);
+			 out = cdiffs(out,tmp2);
+			 tmp1 =  cmuls(in[1],in[3]);
+			 tmp2 = cmuls(tmp1,in[8]);
+			 out = cdiffs(out,tmp2);
+			 tmp1 =  cmuls(in[2],in[4]);
+			 tmp2 = cmuls(tmp1,in[6]);
+			 out = cdiffs(out,tmp2);
+			 break;
+			 
+		default : 
+				  /*Copy the input matrix*/
+			  inCopy=malloc((unsigned int)(size*size)*sizeof(floatComplex));
+			  for (i=0;i<size*size;i++) inCopy[i]=in[i];
+			  
+    			  for (i=0;i<size;i++){
+				for (j=i+1;j<size;j++){
+					pivot = crdivs(inCopy[i*size+j],inCopy[i*size+i]);
+					for (k=0;k<size-i;k++){
+						inCopy[i*size+j+k*size]=cdiffs(inCopy[i*size+j+k*size],cmuls(pivot,inCopy[i*size+i+k*size]));
+					}
+				}
+			  }
+			  out=FloatComplex(1,0);
+			  for (i=0;i<size;i++){
+			  	out = cmuls(out,inCopy[i*size+i]);
+			  }
+			  free(inCopy);
+			  break;
+	}
+#endif
+
+	return out;		 
+}
+
+
-- 
cgit