From 3f52712f806fbd80d66dfdcaff401e5cf94dcca4 Mon Sep 17 00:00:00 2001
From: yash1112
Date: Fri, 7 Jul 2017 21:20:49 +0530
Subject: sci2c arduino updated
---
src/c/matrixOperations/determ/u8determa.c | 92 +++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
create mode 100644 src/c/matrixOperations/determ/u8determa.c
(limited to 'src/c/matrixOperations/determ/u8determa.c')
diff --git a/src/c/matrixOperations/determ/u8determa.c b/src/c/matrixOperations/determ/u8determa.c
new file mode 100644
index 00000000..f226af20
--- /dev/null
+++ b/src/c/matrixOperations/determ/u8determa.c
@@ -0,0 +1,92 @@
+/* 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: Siddhesh Wani
+ Organization: FOSSEE, IIT Bombay
+ Email: toolbox@scilab.in
+*/
+
+#include <stdlib.h>
+#ifndef WITHOUT_LAPACK
+#include "lapack.h"
+#endif
+#include "determ.h"
+#include "lapack.h"
+
+uint8 u8determa(uint8 * in, int size){
+#ifndef WITHOUT_LAPACK
+ int i=0, info=0;
+ uint8 out=0;
+ uint8 *inCopy=NULL;
+ int* tmp=NULL;
+
+ /*Calculation of the determinant*/
+ switch (size){
+ case 2 : out = in[0]*in[3]-in[1]*in[2];
+ break;
+ case 3 : /*regle de Sarrus*/
+ out = in[0]*in[4]*in[8]+in[1]*in[5]*in[6]+in[2]*in[3]*in[7]
+ -in[0]*in[5]*in[7]-in[1]*in[3]*in[8]-in[2]*in[4]*in[6];
+ break;
+ default :
+
+ /*Copy the input matrix*/
+ inCopy=(uint8*)malloc((unsigned int)(size*size)*sizeof(uint8));
+ for (i=0;i<size*size;i++) inCopy[i]=in[i];
+
+ tmp=(int*)malloc((unsigned int)size*sizeof(int));
+ dgetrf_(&size, &size, inCopy, &size, tmp, &info);
+ out=1;
+ for (i=0;i<size;i++){
+ if (tmp[i]!=i+1) out=-out;
+ out=inCopy[i*(size+1)]*out;
+ }
+ free(tmp);
+ free(inCopy);
+ break;
+ }
+
+#else
+ int i=0, j=0, k=0;
+ uint8 out=0, pivot=0;
+ uint8 *inCopy=NULL;
+
+ /*Calculation of the determinant*/
+ switch (size){
+ case 2 : out = in[0]*in[3]-in[1]*in[2];
+ break;
+ case 3 : /*regle de Sarrus*/
+ out = in[0]*in[4]*in[8]+in[1]*in[5]*in[6]+in[2]*in[3]*in[7]
+ -in[0]*in[5]*in[7]-in[1]*in[3]*in[8]-in[2]*in[4]*in[6];
+ break;
+ default :
+
+ /*Copy the input matrix*/
+ inCopy=malloc((unsigned int)(size*size)*sizeof(uint8));
+ 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 = inCopy[i*size+j]/inCopy[i*size+i];
+ for (k=0;k<size-i;k++){
+ inCopy[i*size+j+k*size]-=pivot*inCopy[i*size+i+k*size];
+ }
+ }
+ }
+ out=1;
+ for (i=0;i<size;i++){
+ out *= inCopy[i*size+i];
+ }
+ free(inCopy);
+ break;
+
+ }
+#endif
+
+
+ return out;
+}
--
cgit