SundanceBasicVertexView.cpp

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/* @HEADER@ */
// ************************************************************************
// 
//                             Sundance
//                 Copyright 2011 Sandia Corporation
// 
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
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// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// Questions? Contact Kevin Long (kevin.long@ttu.edu)
// 

/* @HEADER@ */


#include "SundanceBasicVertexView.hpp"
#include "Teuchos_Utils.hpp"

using namespace Teuchos;
using namespace Sundance;
using namespace Sundance;
using namespace Sundance;

string VertexView::toString() const
{
  int* ptr = *base_ +  offset_*length_;
  string rtn="{";
  for (int i=0; i<length_; i++) 
    {
      rtn += Teuchos::toString(ptr[i]);
      if (i < length_-1) rtn += ", ";
    }
  rtn += "}";
  return rtn;
}

/*
 * Return a hash code for the vertex set. 
 */
int VertexView::hashCode() const
{
  int rtn = 0;
      int* p = *base_ + offset_*length_;

      for (int i=0; i<length_; i++)
        {
          rtn += p[i];
        }

      return rtn;

#ifdef BLARF
      // fails with sign int
  int* p = *base_ + offset_*length_;

  unsigned char* key = reinterpret_cast<unsigned char*>(p);
  unsigned int key_len = length_ * sizeof(int);

  /* Jenkins hash */

  unsigned int hash = 0;
  int i;
  
  for (i = 0; i < key_len; i++) {
    hash += key[i];
    hash += (hash << 10);
    hash ^= (hash >> 6);
  }
  hash += (hash << 3);
  hash ^= (hash >> 11);
  hash += (hash << 15);
  return hash;
#endif
}