PDS_TriangleCount/src/v4.cpp

/*!
 * \file    v4.cpp
 * \brief   vv3 part of the exercise.
 *
 * \author
 *    Christos Choutouridis AEM:8997
 *    <cchoutou@ece.auth.gr>
 */

#include <iostream>
#include <random>
#include <v4.h>

namespace v4 {

using index_t  = typename matrix::indexType;
using value_t  = typename matrix::dataType;


std::vector<value_t> mmacc_v(matrix& A, matrix& B) {
   std::vector<value_t> c(A.size());
   for (int i=0 ; i<A.size() ; ++i) {
      for (auto j = A.getRow(i); j.index() != j.end() ; ++j){
         c[i] += A.getRow(i)*B.getCol(j.index());
      }
   }
   return c;
}


value_t sum (std::vector<value_t>& v) {
   value_t s =0;
   for (auto& it : v)
      s += it;
   return s;
}

value_t triang_count (matrix& A) {
   auto v = mmacc_v(A, A);
   return (session.makeSymmetric) ? sum(v)/6 : sum(v);
}

}