ivan@137: /**************************************************************************
ivan@137:  *
ivan@137:  * File name: omputils.c
ivan@137:  *
ivan@137:  * Ron Rubinstein
ivan@137:  * Computer Science Department
ivan@137:  * Technion, Haifa 32000 Israel
ivan@137:  * ronrubin@cs
ivan@137:  *
ivan@137:  * Last Updated: 18.8.2009
ivan@137:  *
ivan@137:  *************************************************************************/
ivan@137: 
ivan@137: #include "omputils.h"
ivan@137: #include <math.h>
ivan@137: 
ivan@137: 
ivan@137: const char FULL_GAMMA_STR[] = "full";
ivan@137: const char SPARSE_GAMMA_STR[] = "sparse";
ivan@137: 
ivan@137: 
ivan@137: /* convert seconds to hours, minutes and seconds */
ivan@137: 
ivan@137: void secs2hms(double sectot, int *hrs, int *mins, double *secs)
ivan@137: {
ivan@137:   *hrs = (int)(floor(sectot/3600)+1e-2);
ivan@137:   sectot = sectot - 3600*(*hrs);
ivan@137:   *mins = (int)(floor(sectot/60)+1e-2);
ivan@137:   *secs = sectot - 60*(*mins);
ivan@137: }
ivan@137: 
ivan@137: 
ivan@137: /* quicksort, public-domain C implementation by Darel Rex Finley. */
ivan@137: /* modification: sorts the array data[] as well, according to the values in the array vals[] */
ivan@137: 
ivan@137: #define  MAX_LEVELS  300
ivan@137: 
ivan@137: void quicksort(mwIndex vals[], double data[], mwIndex n) {
ivan@137:   
ivan@137:   long piv, beg[MAX_LEVELS], end[MAX_LEVELS], i=0, L, R, swap ;
ivan@137:   double datapiv;
ivan@137:   
ivan@137:   beg[0]=0;
ivan@137:   end[0]=n;
ivan@137:   
ivan@137:   while (i>=0) {
ivan@137:     
ivan@137:     L=beg[i]; 
ivan@137:     R=end[i]-1;
ivan@137:     
ivan@137:     if (L<R) {
ivan@137:       
ivan@137:       piv=vals[L];
ivan@137:       datapiv=data[L];
ivan@137:       
ivan@137:       while (L<R) 
ivan@137:       {
ivan@137:         while (vals[R]>=piv && L<R) 
ivan@137:           R--;
ivan@137:         if (L<R) {
ivan@137:           vals[L]=vals[R];
ivan@137:           data[L++]=data[R];
ivan@137:         }
ivan@137:         
ivan@137:         while (vals[L]<=piv && L<R) 
ivan@137:           L++;
ivan@137:         if (L<R) { 
ivan@137:           vals[R]=vals[L];
ivan@137:           data[R--]=data[L];
ivan@137:         }
ivan@137:       }
ivan@137:       
ivan@137:       vals[L]=piv;
ivan@137:       data[L]=datapiv;
ivan@137:       
ivan@137:       beg[i+1]=L+1;
ivan@137:       end[i+1]=end[i];
ivan@137:       end[i++]=L;
ivan@137:       
ivan@137:       if (end[i]-beg[i] > end[i-1]-beg[i-1]) {
ivan@137:         swap=beg[i]; beg[i]=beg[i-1]; beg[i-1]=swap;
ivan@137:         swap=end[i]; end[i]=end[i-1]; end[i-1]=swap;
ivan@137:       }
ivan@137:     }
ivan@137:     else {
ivan@137:       i--;
ivan@137:     }
ivan@137:   }
ivan@137: }