Inventor/SbPList.h

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/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
** Modified by : Nick Thompson (MMM yyyy)
** Modified by : Gavin Bell (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/


#ifndef _SB_PLIST_
#define _SB_PLIST_

#include <Inventor/SbBase.h>
#include <Inventor/STL/cassert>

class SbVec3f;

class  SbPList
{
 public:

  SbPList();

  SbPList(int initSize);

  SbPList(const SbPList &pl);

  virtual ~SbPList();

  void append(void* ptr);

  int find(const void* ptr) const;

  void insert(void* ptr, int addBefore);

  virtual void remove(int which);

  inline int getLength() const
  { return nPtrs; }

  virtual void truncate(int start);

  void copy(const SbPList &pl);

  SbPList &operator =(const SbPList &pl);

  void *&operator [](const int index) const;

  int operator ==(const SbPList &pl) const;

  int operator !=(const SbPList &pl) const;

  void swap( int index1, int index2 );

 private:

  void *get(int i) const;
  void set(int i, void *j);
  
  void **getArray()
 { return ptrs; }

  // internal public call to expand function (see below) in order to reserve more memory in the list.
  // same name than stl reserve function
  void reserve(int size)
  { expand(size); }

private:
  // Number of pointers used
  int nPtrs;

  // There are three(!) methods to expand the list.  grow() is used
  // when space is dynamically created, and needs to be initialized
  // to NULL:
  void grow(int max) const;

  // setSize is used by grow and in other places internally where we
  // know that nothing needs to be initialized to NULL.
  void setSize(int size);

 private:

  // NOTE: this must be called only if the number of elements in the two
  // lists is the same, otherwise badness could result
  int compare(const SbPList &pl) const;

  // The collection of pointers
  void **ptrs;

  // Number of pointers allocated
  int ptrsSize;

  // expand is the lowest level routine.  It just reallocates the
  // array and copies over the old values.
  void expand(int size);

};

inline void* SbPList::get(int i) const
{
  assert(i>=0);
  return ((i>=0)&&(i<nPtrs))?ptrs[i]:NULL;
}

inline void SbPList::truncate(int start)
{
  assert(start>=0);
  nPtrs = (start>=0)?start:0;
}

inline void SbPList::append(void * ptr)
{
  if (nPtrs + 1 > ptrsSize)
    expand(nPtrs + 1);
  ptrs[nPtrs++] = ptr;
}

inline void*& SbPList::operator[](const int index) const
{
  assert(index>=0);
  if (index>= nPtrs)
    grow(index);
  return ptrs[index];
}


// Keep include for compatibility
#include <Inventor/lists/SbIntList.h>
#include <Inventor/lists/SbVec3fList.h>
#include <Inventor/lists/SbStringList.h>

#endif

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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