source: trunk/lib/utility.h @ 14

//$Id: utility.h 14 2005-12-30 14:57:47Z peter $

#ifndef _theplu_svnstat_utility_
#define _theplu_svnstat_utility_

#include <algorithm>
#include <functional>
#include <utility>
#include <vector>

namespace theplu{
namespace svnstat{

  ///
  /// Calculating sum of two vectors.
  ///
  /// @return resulting vector
  ///
  template <class T >
    struct VectorPlus : 
  public std::binary_function<std::vector<T>,std::vector<T>,std::vector<T> >
    {
      std::vector<T> operator()(const std::vector<T>& u,
        const std::vector<T>& v) const 
      {
  if ( u.size() > v.size() ){
    std::vector<T> res(u.size());
    transform(u.begin(), u.end(), v.begin(), res.begin(), std::plus<T>());
    copy(u.begin()+v.size(), u.end(), res.begin()+v.size());
    return res;
  }
  
  std::vector<T> res(v.size());
  transform(v.begin(), v.end(), u.begin(), res.begin(), std::plus<T>());
  if ( v.size() > u.size() )
    copy(u.begin()+v.size(), u.end(), res.begin()+v.size());
  return res;
      }

    };

  ///
  /// @return resulting vector
  ///
  template <class Key, class T>
    struct PairValuePlus :
  public std::binary_function<std::vector<T>,
    std::pair<const Key, std::vector<T> >, 
    std::vector<T> >
    {
      std::vector<T> operator()(const std::vector<T>& sum, 
        const std::pair<const Key,std::vector<T> >& p)
      {
  return VectorPlus<T>()(sum, p.second);
      }
    };
}}

#endif // end of namespace svnstat end of namespace theplu