netgen/libsrc/general/table.hpp

#ifndef FILE_TABLE
#define FILE_TABLE

/**************************************************************************/
/* File:   table.hpp                                                      */
/* Author: Joachim Schoeberl                                              */
/* Date:   01. Jun. 95                                                    */
/**************************************************************************/

namespace netgen
{


/// Base class to generic class TABLE.
class BASE_TABLE
{
protected:
  
  ///
  class linestruct
  {
  public:
    ///
    int size;
    /// 
    int maxsize;
    ///
    void * col;
  };
  
  ///
  Array<linestruct> data;
  char * oneblock;

public:
  ///
  BASE_TABLE (int size);
  ///
  BASE_TABLE (const FlatArray<int> & entrysizes, int elemsize);
  ///
  ~BASE_TABLE ();
  ///
  void SetSize (int size);
  ///
  void ChangeSize (int size);

  /// increment size of entry i by one, i is 0-based
  void IncSize (int i, int elsize)
  {
    if (data[i].size < data[i].maxsize)
      data[i].size++;
    else
      IncSize2 (i, elsize);
  }

  void SetEntrySize (int i, int newsize, int elsize)
  {
    if (newsize < data[i].maxsize)
      data[i].size = newsize;
    else
      SetEntrySize2 (i, newsize, elsize);
  }

  ///
  void IncSize2 (int i, int elsize);
  void SetEntrySize2 (int i, int newsize, int elsize);

  //  void DecSize (int i);

  ///
  void AllocateElementsOneBlock (int elemsize);
  
  int AllocatedElements () const;
  int UsedElements () const;

  void SetElementSizesToMaxSizes ();
};







/** 
   Abstract data type TABLE.
   
   To an integer i in the range from 1 to size a set of elements of the
   generic type T is associated. 
*/
template <class T, int BASE = 0>
class TABLE : public BASE_TABLE
{
public:
  /// Creates table.
  inline TABLE () : BASE_TABLE(0) { ; }

  /// Creates table of size size
  inline TABLE (int size) : BASE_TABLE (size) { ; }

  /// Creates fixed maximal element size table
  inline TABLE (const FlatArray<int,BASE> & entrysizes)
    : BASE_TABLE (FlatArray<int> (entrysizes.Size(), const_cast<int*>(&entrysizes[BASE])), 
		  sizeof(T))
  { ; }
  
  /// Changes Size of table to size, deletes data
  inline void SetSize (int size)
  {
    BASE_TABLE::SetSize (size);
  }

  /// Changes Size of table to size, keep data
  inline void ChangeSize (int size)
  {
    BASE_TABLE::ChangeSize (size);
  }


  /// Inserts element acont into row i, BASE-based. Does not test if already used.
  inline void Add (int i, const T & acont)
  {
    IncSize (i-BASE, sizeof (T));
    ((T*)data[i-BASE].col)[data[i-BASE].size-1] = acont;
  }


  /// Inserts element acont into row i, 1-based. Does not test if already used.
  inline void Add1 (int i, const T & acont)
  {
    IncSize (i-1, sizeof (T));
    ((T*)data.Elem(i).col)[data.Elem(i).size-1] = acont;
  }
  
  ///
  void IncSizePrepare (int i)
  {
    data[i-BASE].maxsize++;
  }


  /// Inserts element acont into row i. BASE-based. Does not test if already used, assumes to have enough memory
  inline void AddSave (int i, const T & acont)
    {
      ((T*)data[i-BASE].col)[data[i-BASE].size] = acont;
      data[i-BASE].size++;
    }

  /// Inserts element acont into row i. 1-based. Does not test if already used, assumes to have mem
  inline void AddSave1 (int i, const T & acont)
    {
      ((T*)data.Elem(i).col)[data.Elem(i).size] = acont;
      data.Elem(i).size++;
    }

  /// Inserts element acont into row i. Does not test if already used.
  inline void AddEmpty (int i)
  {
    IncSize (i-BASE, sizeof (T));
  }

  /** Set the nr-th element in the i-th row to acont.
    Does not check for overflow. */
  inline void Set (int i, int nr, const T & acont)
    { ((T*)data.Get(i).col)[nr-1] = acont; }
  /** Returns the nr-th element in the i-th row.
    Does not check for overflow. */
  inline const T & Get (int i, int nr) const
    { return ((T*)data.Get(i).col)[nr-1]; }


  /** Returns pointer to the first element in row i. */
  inline const T * GetLine (int i) const
  {
    return ((const T*)data.Get(i).col);
  }


  /// Returns size of the table.
  inline int Size () const
  {
    return data.Size();
  }

  /// Returns size of the i-th row.
  inline int EntrySize (int i) const
    { return data.Get(i).size; }

  /*
  inline void DecEntrySize (int i)
    { DecSize(i); }
  */
  void AllocateElementsOneBlock ()
    { BASE_TABLE::AllocateElementsOneBlock (sizeof(T)); }


  inline void PrintMemInfo (ostream & ost) const
  {
    int els = AllocatedElements(); 
    ost << "table: allocaed " << els 
	<< " a " << sizeof(T) << " Byts = " 
	<< els * sizeof(T) 
	<< " bytes in " << Size() << " bags."
	<< " used: " << UsedElements()
	<< endl;
  }

  /// Access entry.
  FlatArray<T> operator[] (int i) const
  { 
#ifdef DEBUG
    if (i-BASE < 0 || i-BASE >= data.Size())
      cout << "table out of range, i = " << i << ", s = " << data.Size() << endl;
#endif

    return FlatArray<T> (data[i-BASE].size, (T*)data[i-BASE].col);
  }
};


template <class T, int BASE>
inline ostream & operator<< (ostream & ost, const TABLE<T,BASE> & table)
{
  for (int i = BASE; i < table.Size()+BASE; i++)
    {
      ost << i << ": ";
      FlatArray<T> row = table[i];
      ost << "(" << row.Size() << ") ";
      for (int j = 0; j < row.Size(); j++)
	ost << row[j] << " ";
      ost << endl;
    }
  return ost;
}

}

#endif