comparison util/ksvd utils/ompbox utils/omputils.c @ 137:9207d56c5547 ivand_dev

New ompbox in utils for testing purposes

+/**************************************************************************
+ *
+ * File name: omputils.c
+ *
+ * Ron Rubinstein
+ * Computer Science Department
+ * Technion, Haifa 32000 Israel
+ * ronrubin@cs
+ *
+ * Last Updated: 18.8.2009
+ *
+ *************************************************************************/
+
+#include "omputils.h"
+#include <math.h>
+
+
+const char FULL_GAMMA_STR[] = "full";
+const char SPARSE_GAMMA_STR[] = "sparse";
+
+
+/* convert seconds to hours, minutes and seconds */
+
+void secs2hms(double sectot, int *hrs, int *mins, double *secs)
+{
+  *hrs = (int)(floor(sectot/3600)+1e-2);
+  sectot = sectot - 3600*(*hrs);
+  *mins = (int)(floor(sectot/60)+1e-2);
+  *secs = sectot - 60*(*mins);
+}
+
+
+/* quicksort, public-domain C implementation by Darel Rex Finley. */
+/* modification: sorts the array data[] as well, according to the values in the array vals[] */
+
+#define  MAX_LEVELS  300
+
+void quicksort(mwIndex vals[], double data[], mwIndex n) {
+  
+  long piv, beg[MAX_LEVELS], end[MAX_LEVELS], i=0, L, R, swap ;
+  double datapiv;
+  
+  beg[0]=0;
+  end[0]=n;
+  
+  while (i>=0) {
+    
+    L=beg[i]; 
+    R=end[i]-1;
+    
+    if (L<R) {
+      
+      piv=vals[L];
+      datapiv=data[L];
+      
+      while (L<R) 
+      {
+        while (vals[R]>=piv && L<R) 
+          R--;
+        if (L<R) {
+          vals[L]=vals[R];
+          data[L++]=data[R];
+        }
+        
+        while (vals[L]<=piv && L<R) 
+          L++;
+        if (L<R) { 
+          vals[R]=vals[L];
+          data[R--]=data[L];
+        }
+      }
+      
+      vals[L]=piv;
+      data[L]=datapiv;
+      
+      beg[i+1]=L+1;
+      end[i+1]=end[i];
+      end[i++]=L;
+      
+      if (end[i]-beg[i] > end[i-1]-beg[i-1]) {
+        swap=beg[i]; beg[i]=beg[i-1]; beg[i-1]=swap;
+        swap=end[i]; end[i]=end[i-1]; end[i-1]=swap;
+      }
+    }
+    else {
+      i--;
+    }
+  }
+}