modules/up/src/rpsl/gnu/SymID.Set.h

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FUNCTIONS

This source file includes following functions.
  1. SymIDSet
  2. SymIDSet
  3. length
  4. empty

   1 // This may look like C code, but it is really -*- C++ -*-
   2 /* 
   3 Copyright (C) 1988 Free Software Foundation
   4     written by Doug Lea (dl@rocky.oswego.edu)
   5 
   6 This file is part of the GNU C++ Library.  This library is free
   7 software; you can redistribute it and/or modify it under the terms of
   8 the GNU Library General Public License as published by the Free
   9 Software Foundation; either version 2 of the License, or (at your
  10 option) any later version.  This library is distributed in the hope
  11 that it will be useful, but WITHOUT ANY WARRANTY; without even the
  12 implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  13 PURPOSE.  See the GNU Library General Public License for more details.
  14 You should have received a copy of the GNU Library General Public
  15 License along with this library; if not, write to the Free Software
  16 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17 */
  18 
  19 
  20 #ifndef _SymIDSet_h
  21 #ifdef __GNUG__
  22 #pragma interface
  23 #endif
  24 #define _SymIDSet_h 1
  25 
  26 #include "Pix.h"
  27 #include "SymID.defs.h"
  28 
  29 class SymIDSet
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  30 {
  31 protected:
  32 
  33   int                   count;
  34 
  35 public:
  36   inline virtual              ~SymIDSet();
  37 
  38   int                   length() const;              // current number of items
  39   int                   empty() const;
  40 
  41   virtual Pix           add(SymID  item) = 0;      // add item; return Pix
  42   virtual void          del(SymID  item) = 0;      // delete item
  43   virtual int           contains(SymID  item) const;     // is item in set?
  44 
  45   virtual void          clear();                 // delete all items
  46 
  47   virtual Pix           first() const = 0;             // Pix of first item or 0
  48   virtual void          next(Pix& i) const = 0;        // advance to next or 0
  49   virtual SymID&          operator () (Pix i) const = 0; // access item at i
  50 
  51   virtual int           owns(Pix i);             // is i a valid Pix  ?
  52   virtual Pix           seek(SymID  item) const;         // Pix of item
  53 
  54   void                  operator |= (SymIDSet& b); // add all items in b
  55   void                  operator -= (SymIDSet& b); // delete items also in b
  56   void                  operator &= (SymIDSet& b); // delete items not in b
  57 
  58   int                   operator == (const SymIDSet& b) const;
  59   int                   operator != (const SymIDSet& b) const;
  60   int                   operator <= (const SymIDSet& b) const; 
  61 
  62   void                  error(const char* msg) const;
  63   virtual int           OK() = 0;                // rep invariant
  64 };
  65 
  66 inline SymIDSet::~SymIDSet() {}
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  67 
  68 inline int SymIDSet::length() const
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  69 {
  70   return count;
  71 }
  72 
  73 inline int SymIDSet::empty() const
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  74 {
  75   return count == 0;
  76 }
  77 
  78 #endif

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