93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
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// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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// there is no distinction between name with no value and name with NULL value
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// null names are not permitted (they will be ignored).
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struct association {
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symbol s;
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void *v;
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association() : v(0) {}
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};
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class dictionary;
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class dictionary_iterator {
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dictionary *dict;
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int i;
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public:
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dictionary_iterator(dictionary &);
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int get(symbol *, void **);
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};
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class dictionary {
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int size;
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int used;
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double threshold;
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double factor;
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association *table;
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void rehash(int);
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public:
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dictionary(int);
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void *lookup(symbol s, void *v=0); // returns value associated with key
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void *lookup(const char *);
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// if second parameter not NULL, value will be replaced
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void *remove(symbol);
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friend class dictionary_iterator;
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};
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class object {
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int rcount;
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public:
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object();
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virtual ~object();
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void add_reference();
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void remove_reference();
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};
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class object_dictionary;
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class object_dictionary_iterator {
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dictionary_iterator di;
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public:
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object_dictionary_iterator(object_dictionary &);
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int get(symbol *, object **);
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};
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class object_dictionary {
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dictionary d;
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public:
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object_dictionary(int);
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object *lookup(symbol nm);
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void define(symbol nm, object *obj);
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void rename(symbol oldnm, symbol newnm);
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void remove(symbol nm);
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int alias(symbol newnm, symbol oldnm);
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friend class object_dictionary_iterator;
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};
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inline int object_dictionary_iterator::get(symbol *sp, object **op)
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{
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return di.get(sp, (void **)op);
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}
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