/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkVoidArray.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-1998 Ken Martin, Will Schroeder, Bill Lorensen.

This software is copyrighted by Ken Martin, Will Schroeder and Bill Lorensen.
The following terms apply to all files associated with the software unless
explicitly disclaimed in individual files. This copyright specifically does
not apply to the related textbook "The Visualization Toolkit" ISBN
013199837-4 published by Prentice Hall which is covered by its own copyright.

The authors hereby grant permission to use, copy, and distribute this
software and its documentation for any purpose, provided that existing
copyright notices are retained in all copies and that this notice is included
verbatim in any distributions. Additionally, the authors grant permission to
modify this software and its documentation for any purpose, provided that
such modifications are not distributed without the explicit consent of the
authors and that existing copyright notices are retained in all copies. Some
of the algorithms implemented by this software are patented, observe all
applicable patent law.

IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE IS PROVIDED ON AN
"AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.


=========================================================================*/
// .NAME vtkVoidArray - dynamic, self-adjusting array of void* pointers
// .SECTION Description
// vtkVoidArray is an array of pointers to void. It provides methods
// for insertion and retrieval of these pointers values, and will 
// automatically resize itself to hold new data.

#ifndef __vtkVoidArray_h
#define __vtkVoidArray_h

#include "vtkDataArray.h"

class VTK_EXPORT vtkVoidArray : public vtkDataArray
{
public:
  vtkVoidArray();
  ~vtkVoidArray();
  int Allocate(const int sz, const int ext=1000);
  void Initialize();
  static vtkVoidArray *New() {return new vtkVoidArray;};
  const char *GetClassName() {return "vtkVoidArray";};
  void PrintSelf(ostream& os, vtkIndent indent);

  // satisfy vtkDataArray API
  vtkDataArray *MakeObject() {return new vtkVoidArray;};
  int GetDataType() {return VTK_VOID;};
  void SetNumberOfTuples(const int number);
  float *GetTuple(const int i);
  void GetTuple(const int i, float * tuple);
  void SetTuple(const int i, const float * tuple);
  void InsertTuple(const int i, const float * tuple);
  int InsertNextTuple(const float * tuple);
  void Squeeze();

  // native access/insertion methods
  void* GetValue(const int id);
  void SetNumberOfValues(const int number);
  void SetValue(const int id, void *value);
  void InsertValue(const int id, void* p);
  int InsertNextValue(void* v);
  void** GetPointer(const int id) {return this->Array + id;}
  void** WritePointer(const int id, const int number);
  void *GetVoidPointer(const int id) {return this->GetPointer(id);};
  void DeepCopy(vtkDataArray &da);

private:
  void** Array;  // pointer to data
  void** Resize(const int sz);  // function to resize data

  int TupleSize; //used for data conversion
  float *Tuple;
};

// Description:
// Get the data at a particular index.
inline void* vtkVoidArray::GetValue(const int id) {return this->Array[id];}

// Description:
// Specify the number of values for this object to hold. Does an
// allocation as well as setting the MaxId ivar. Used in conjunction with
// SetValue() method for fast insertion.
inline void vtkVoidArray::SetNumberOfValues(const int number) 
{
  this->Allocate(number);
  this->MaxId = number - 1;
}

// Description:
// Set the data at a particular index. Does not do range checking. Make sure
// you use the method SetNumberOfValues() before inserting data.
inline void vtkVoidArray::SetValue(const int id, void *value) 
{
  this->Array[id] = value;
}

// Description:
// Get the address of a particular data index. Make sure data is allocated
// for the number of items requested. Set MaxId according to the number of
// data values requested.
inline void** vtkVoidArray::WritePointer(const int id, const int number) 
{
  int newSize=id+number;
  if ( newSize > this->Size ) this->Resize(newSize);
  if ( (--newSize) > this->MaxId ) this->MaxId = newSize;
  return this->Array + id;
}

// Description:
// Insert data at a specified position in the array.
inline void vtkVoidArray::InsertValue(const int id, void* p)
{
  if ( id >= this->Size ) this->Resize(id+1);
  this->Array[id] = p;
  if ( id > this->MaxId ) this->MaxId = id;
}

// Description:
// Insert data at the end of the array. Return its location in the array.
inline int vtkVoidArray::InsertNextValue(void* p)
{
  this->InsertValue (++this->MaxId,p);
  return this->MaxId;
}

// Description:
// Resize object to just fit data requirement. Reclaims extra memory.
inline void vtkVoidArray::Squeeze() {this->Resize (this->MaxId+1);}

#endif
