poly_Handles.h

//-----------------------------------------------------------------------------
// Created on: 18 September 2018
//-----------------------------------------------------------------------------
// Copyright (c) 2013-present, Sergey Slyadnev
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//    * Redistributions of source code must retain the above copyright
//      notice, this list of conditions and the following disclaimer.
//    * 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.
//    * Neither the name of Sergey Slyadnev nor the
//      names of all contributors may be used to endorse or promote products
//      derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//-----------------------------------------------------------------------------
 
#ifndef poly_Handles_HeaderFile
#define poly_Handles_HeaderFile
 
// Poly includes
#include <mobius/poly.h>
 
#define Mobius_InvalidHandleIndex -1
 
namespace mobius {
 
//-----------------------------------------------------------------------------
 
class poly_BaseHandle
{
public:
 
  explicit poly_BaseHandle(const int _idx = Mobius_InvalidHandleIndex) : iIdx(_idx) {}
 
public:
 
  int GetIdx() const { return iIdx; }
 
  bool IsValid() const { return iIdx >= 0; }
 
  void Invalidate() { iIdx = Mobius_InvalidHandleIndex; }
 
  bool operator==(const poly_BaseHandle& _rhs) const
  {
    return this->iIdx == _rhs.iIdx;
  }
 
  bool operator!=(const poly_BaseHandle& _rhs) const
  {
    return this->iIdx != _rhs.iIdx;
  }
 
  bool operator<(const poly_BaseHandle& _rhs) const
  {
    return this->iIdx < _rhs.iIdx;
  }
 
protected:
 
  void increment() { ++iIdx; } 
  void decrement() { --iIdx; } 
 
  void increment(const int amount) { iIdx += amount; }
 
  void decrement(const int amount) { iIdx -= amount; }
 
public:
 
  int iIdx; 
 
};
 
//-----------------------------------------------------------------------------
 
struct poly_VertexHandle : public poly_BaseHandle
{
  explicit poly_VertexHandle(const int _idx = Mobius_InvalidHandleIndex) : poly_BaseHandle(_idx) {}
};
 
//-----------------------------------------------------------------------------
 
struct poly_EdgeHandle : public poly_BaseHandle
{
  explicit poly_EdgeHandle(const int _idx = Mobius_InvalidHandleIndex) : poly_BaseHandle(_idx) {}
};
 
//-----------------------------------------------------------------------------
 
struct poly_TriangleHandle : public poly_BaseHandle
{
  explicit poly_TriangleHandle(const int _idx = Mobius_InvalidHandleIndex) : poly_BaseHandle(_idx) {}
};
 
//-----------------------------------------------------------------------------
 
struct poly_QuadHandle : public poly_BaseHandle
{
  explicit poly_QuadHandle(const int _idx = Mobius_InvalidHandleIndex) : poly_BaseHandle(_idx) {}
};
 
}
 
//-----------------------------------------------------------------------------
// Hashers
//-----------------------------------------------------------------------------
 
// Std includes.
#include <functional>
 
namespace std {
 
template <>
struct hash<mobius::poly_BaseHandle>
{
  typedef mobius::poly_BaseHandle argument_type;
  typedef std::size_t             result_type;
 
  std::size_t operator()(const mobius::poly_BaseHandle& h) const
  {
    return h.GetIdx();
  }
};
 
template <>
struct hash<mobius::poly_VertexHandle>
{
  typedef mobius::poly_VertexHandle argument_type;
  typedef std::size_t               result_type;
 
  std::size_t operator()(const mobius::poly_VertexHandle& h) const
  {
    return h.GetIdx();
  }
};
 
template <>
struct hash<mobius::poly_EdgeHandle>
{
  typedef mobius::poly_EdgeHandle argument_type;
  typedef std::size_t             result_type;
 
  std::size_t operator()(const mobius::poly_EdgeHandle& h) const
  {
    return h.GetIdx();
  }
};
 
template <>
struct hash<mobius::poly_TriangleHandle>
{
  typedef mobius::poly_TriangleHandle argument_type;
  typedef std::size_t                 result_type;
 
  std::size_t operator()(const mobius::poly_TriangleHandle& h) const
  {
    return h.GetIdx();
  }
};
 
template <>
struct hash<mobius::poly_QuadHandle>
{
  typedef mobius::poly_QuadHandle argument_type;
  typedef std::size_t             result_type;
 
  std::size_t operator()(const mobius::poly_QuadHandle& h) const
  {
    return h.GetIdx();
  }
};
 
}
 
#endif