ConstrainedOptPack_ComputeMinMult.cpp

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// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
//                  Copyright (2003) Sandia Corporation
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#include <limits>

#include "ConstrainedOptPack_ComputeMinMult.hpp"
#include "AbstractLinAlgPack_SpVectorClass.hpp"
#include "DenseLinAlgPack_DVectorClass.hpp"

namespace {
template< class T >
inline
T my_min( const T& v1, const T& v2 ) { return v1 < v2 ? v1 : v2; }
} // end namespace

ConstrainedOptPack::value_type
ConstrainedOptPack ::min_abs( const DVectorSlice& mu )
{
  if( !mu.dim() )
    return 0.0;
  value_type min = std::fabs(mu(1));
  for( DVectorSlice::const_iterator itr = mu.begin() + 1; itr != mu.end(); )
    min = my_min( min, std::fabs(*itr++) );
  return min;
}

ConstrainedOptPack::value_type
ConstrainedOptPack ::min_abs( const SpVectorSlice& mu )
{
  if( !mu.dim() )
    return 0.0;
  if( !mu.nz() )
    return 0.0;
  value_type min = std::fabs(mu.begin()->value());
  for( SpVectorSlice::const_iterator itr = mu.begin() + 1; itr != mu.end(); ++itr )
    min = my_min( min, std::fabs(itr->value()) );
  return min;
}