src/roff/troff/dictionary.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  20
  21
  22
  23 // there is no distinction between name with no value and name with NULL value
  24 // null names are not permitted (they will be ignored).
  25
  26 struct association {
  27   symbol s;
  28   void *v;
  29   association() :  v(0) {}
  30 };
  31
  32 class dictionary;
  33
  34 class dictionary_iterator {
  35   dictionary *dict;
  36   int i;
  37 public:
  38   dictionary_iterator(dictionary &);
  39   int get(symbol *, void **);
  40 };
  41
  42 class dictionary {
  43   int size;
  44   int used;
  45   double threshold;
  46   double factor;
  47   association *table;
  48   void rehash(int);
  49 public:
  50   dictionary(int);
  51   void *lookup(symbol s, void *v=0); // returns value associated with key
  52   void *lookup(const char *);
  53   // if second parameter not NULL, value will be replaced
  54   void *remove(symbol);
  55   friend class dictionary_iterator;
  56 };
  57
  58 class object {
  59   int rcount;
  60  public:
  61   object();
  62   virtual ~object();
  63   void add_reference();
  64   void remove_reference();
  65 };
  66
  67 class object_dictionary;
  68
  69 class object_dictionary_iterator {
  70   dictionary_iterator di;
  71 public:
  72   object_dictionary_iterator(object_dictionary &);
  73   int get(symbol *, object **);
  74 };
  75
  76 class object_dictionary {
  77   dictionary d;
  78 public:
  79   object_dictionary(int);
  80   object *lookup(symbol nm);
  81   void define(symbol nm, object *obj);
  82   void rename(symbol oldnm, symbol newnm);
  83   void remove(symbol nm);
  84   int alias(symbol newnm, symbol oldnm);
  85   friend class object_dictionary_iterator;
  86 };
  87
  88
  89 inline int object_dictionary_iterator::get(symbol *sp, object **op)
  90 {
  91   return di.get(sp, (void **)op);
  92 }