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#ifndef EQUALVAL_H
#define EQUALVAL_H

#include <vector>

namespace pointsprite
{

// ****************************************************************************
//  Class:  EqualVal
//
//  Purpose:
//    Comparison functions
//
//  Programmer:  Mark C. Miller
//  Creation:    06May03
//
// ****************************************************************************
template <class T>
struct EqualVal
{
  inline static bool EqualScalar(void* a1, void* a2);
  inline static bool EqualArray(void* a1, void* a2, int l);
  inline static bool EqualVector(void* a1, void* a2);
};

// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
//                               Inline Methods
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------

// ****************************************************************************
//  Methods:  EqualVal<T>::Equal*
//
//  Purpose:
//    Methods for comparison.
//
//  Arguments:
//    a1         the pointer to the first operand of comparison
//    a2         the pointer to the second operand of comparison
//    l          (where applicable) the length of the array
//
//  Programmer:  Mark C. Miller (cut/paste/modify from Jeremey's stuff)
//  Creation:    06May03
//
// ****************************************************************************
template <class T>
bool EqualVal<T>::EqualScalar(void* a1_, void* a2_)
{
  T* a1 = (T*)a1_;
  T* a2 = (T*)a2_;
  if (*a1 == *a2)
    return true;
  else
    return false;
}

template <class T>
bool EqualVal<T>::EqualArray(void* a1_, void* a2_, int l)
{
  if (a1_ == a2_)
    return true;
  T* a1 = (T*)a1_;
  T* a2 = (T*)a2_;
  for (int i = 0; i < l; i++)
  {
    if (a1[i] != a2[i])
      return false;
  }
  return true;
}

template <class T>
bool EqualVal<T>::EqualVector(void* a1_, void* a2_)
{
  if (a1_ == a2_)
    return true;
  std::vector<T>& a1 = *(std::vector<T>*)a1_;
  std::vector<T>& a2 = *(std::vector<T>*)a2_;
  int l1 = static_cast<int>(a1.size());
  int l2 = static_cast<int>(a2.size());
  if (l1 != l2)
    return false;
  else
  {
    for (int i = 0; i < l1; i++)
    {
      if (a1[i] != a2[i])
        return false;
    }
  }
  return true;
}

// ****************************************************************************
//  Method:  EqualVal<AttributeGroup*>::EqualVector
//
//  Purpose:
//    Specialized method for equality of Attribute Group Vectors.
//
//  Arguments:
//    a1         the pointer to the first  operand of comparsion
//    a2         the pointer to the second operand of comparison
//
//  Programmer:  Mark C. Miller
//  Creation:    06May03
//
// ****************************************************************************
template <>
bool EqualVal<AttributeGroup*>::EqualVector(void* a1_, void* a2_)
{
  if (a1_ == a2_)
    return true;
  AttributeGroupVector& a1 = *(AttributeGroupVector*)a1_;
  AttributeGroupVector& a2 = *(AttributeGroupVector*)a2_;
  int l1 = static_cast<int>(a1.size());
  int l2 = static_cast<int>(a2.size());
  if (l1 != l2)
    return false;
  for (int i = 0; i < l1; i++)
  {
    if (!a1[i]->EqualTo(a2[i]))
      return false;
  }
  return true;
}
}
#endif
