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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkIntArray.h,v $
  Language:  C++
  Date:      $Date: 2002/11/12 18:32:04 $
  Version:   $Revision: 1.74 $

  Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notice for more information.

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

#ifndef __vtkIntArray_h
#define __vtkIntArray_h

#include "vtkDataArray.h"

class VTK_COMMON_EXPORT vtkIntArray : public vtkDataArray
{
public:
  static vtkIntArray *New();

  vtkTypeRevisionMacro(vtkIntArray,vtkDataArray);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Allocate memory for this array. Delete old storage only if necessary.
  // Note that ext is no longer used.
  int Allocate(const vtkIdType sz, const vtkIdType ext=1000);
  
  // Description:
  // Release storage and reset array to initial state.
  void Initialize();

  // Description:
  // Get the data type.
  int GetDataType() 
    {return VTK_INT;}

  // Description:
  // Return the size of the data type.
  int GetDataTypeSize() { return sizeof(int); }

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

  // Description:
  // Resize the array while conserving the data.
  virtual void Resize(vtkIdType numTuples);

  // Description:
  // Set the number of n-tuples in the array.
  void SetNumberOfTuples(const vtkIdType number);

  // Description:
  // Get a pointer to a tuple at the ith location. This is a dangerous method
  // (it is not thread safe since a pointer is returned).
  float *GetTuple(const vtkIdType i);
  
  // Description:
  // Copy the tuple value into a user-provided array.
  void GetTuple(const vtkIdType i, float * tuple);
  void GetTuple(const vtkIdType i, double * tuple);

  // Description:
  // Set the tuple value at the ith location in the array.
  void SetTuple(const vtkIdType i, const float * tuple);
  void SetTuple(const vtkIdType i, const double * tuple);

  // Description:
  // Insert (memory allocation performed) the tuple into the ith location
  // in the array.
  void InsertTuple(const vtkIdType i, const float * tuple);
  void InsertTuple(const vtkIdType i, const double * tuple);

  // Description:
  // Insert (memory allocation performed) the tuple onto the end of the array.
  vtkIdType InsertNextTuple(const float * tuple);
  vtkIdType InsertNextTuple(const double * tuple);

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

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

  // 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.
  void SetNumberOfValues(const vtkIdType number);

  // Description:
  // Insert data at a specified position in the array.
  void InsertValue(const vtkIdType id, const int i);

  // Description:
  // Insert data at the end of the array. Return its location in the array.
  vtkIdType InsertNextValue(const int i);

  // Description:
  // Return the data component at the ith tuple and jth component location.
  // Note that i is less then NumberOfTuples and j is less then 
  // NumberOfComponents.
  float GetComponent(const vtkIdType i, const int j);
  
  // Description:
  // Set the data component at the ith tuple and jth component location.
  // Note that i is less then NumberOfTuples and j is less then 
  // NumberOfComponents. Make sure enough memory has been allocated 
  // (use SetNumberOfTuples() and SetNumberOfComponents()).
  void SetComponent(const vtkIdType i, const int j, float c);
  
  // Description:
  // Insert the data component at ith tuple and jth component location. 
  // Note that memory allocation is performed as necessary to hold the data.
  virtual void InsertComponent(const vtkIdType i, const int j, float c);

  // Description:
  // Get the address of a particular data index. Performs no checks
  // to verify that the memory has been allocated etc.
  int *GetPointer(const vtkIdType id) 
    {return this->Array + id;}
  void *GetVoidPointer(const vtkIdType id) 
    {return (void *)this->GetPointer(id);}

  // 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.
  int *WritePointer(const vtkIdType id, const vtkIdType number);

  // Description:
  // Deep copy of another integer array.
  void DeepCopy(vtkDataArray *ia);

  // Description:
  // This method lets the user specify data to be held by the array.  The 
  // array argument is a pointer to the data.  size is the size of 
  // the array supplied by the user.  Set save to 1 to keep the class
  // from deleting the array when it cleans up or reallocates memory.
  // The class uses the actual array provided; it does not copy the data 
  // from the suppled array.
  void SetArray(int* array, vtkIdType size, int save);
  void SetVoidArray(void *array,vtkIdType size, int save) 
    {this->SetArray((int*)array, size, save);};

protected:
  vtkIntArray(vtkIdType numComp=1);
  ~vtkIntArray();

  int *Array;   // pointer to data
  int *ResizeAndExtend(const vtkIdType sz);  // function to resize data

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

  int SaveUserArray;
private:
  vtkIntArray(const vtkIntArray&);  // Not implemented.
  void operator=(const vtkIntArray&);  // Not implemented.
};


inline void vtkIntArray::SetNumberOfValues(const vtkIdType number) 
{
  this->Allocate(number);
  this->MaxId = number - 1;
}

inline int *vtkIntArray::WritePointer(const vtkIdType id,
                                      const vtkIdType number)
{
  vtkIdType newSize=id+number;
  if ( newSize > this->Size )
    {
    this->ResizeAndExtend(newSize);
    }
  if ( (--newSize) > this->MaxId )
    {
    this->MaxId = newSize;
    }
  return this->Array + id;
}

inline void vtkIntArray::InsertValue(const vtkIdType id, const int i)
{
  if ( id >= this->Size )
    {
    this->ResizeAndExtend(id+1);
    }
  this->Array[id] = i;
  if ( id > this->MaxId )
    {
    this->MaxId = id;
    }
}

inline vtkIdType vtkIntArray::InsertNextValue(const int i)
{
  this->InsertValue (++this->MaxId,i); 
  return this->MaxId;
}


#endif
