File handling functions added

1 files changed, 28 insertions, 16 deletions

diff --git a/src/c/differential_calculus/ode/dodes.c b/src/c/differential_calculus/ode/dodes.c
index ee6718bb..adef1ba7 100644
--- a/src/c/differential_calculus/ode/dodes.c
+++ b/src/c/differential_calculus/ode/dodes.c
@@ -1,13 +1,16 @@
-// 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
+/* 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
+*/
+
+/*Function for solving ODEs using GSL library*/
 
 #include "ode.h"
 #include "types.h"
@@ -17,20 +20,29 @@
 
 
 double dodes(double initial_value, double start_time, double end_time, \
-			char *ode_function, double nequs, double eps_abs, double eps_rel, \
-			double step_size)
+			int (*ode_function), char *solver_type, double nequs, double eps_abs, \
+			double eps_rel, double step_size, int *params)
 {
-	double out = 0;
+	double out = 0, t = 0;
 	//int status;
+	out = initial_value;
+	t = start_time;
 	//Setup ODE related parameters
-	gsl_odeiv2_system sys = {ode_function, NULL, 2, NULL};
+	gsl_odeiv2_system sys = {ode_function, NULL, nequs, NULL};
 
 	gsl_odeiv2_step    *s = gsl_odeiv2_step_alloc (gsl_odeiv2_step_rkf45, nequs);
   	gsl_odeiv2_control *c = gsl_odeiv2_control_y_new (eps_abs, eps_rel);
   	gsl_odeiv2_evolve  *e = gsl_odeiv2_evolve_alloc (nequs);
   
-  	gsl_odeiv2_evolve_apply_fixed_step (e, c, s, &sys, &start_time, step_size, &out);
-	
+  	while(t < end_time)
+  	{
+  		gsl_odeiv2_evolve_apply_fixed_step (e, c, s, &sys, &t, step_size, &out);
+	}
+
+	gsl_odeiv2_evolve_free (e);
+  	gsl_odeiv2_control_free (c);
+  	gsl_odeiv2_step_free (s);
+
 	return out;
 	
 }