2 /* Copyright (C) 1989, 1990, 1991, 1992, 2002, 2004
3 Free Software Foundation, Inc.
4 Written by James Clark (jjc@jclark.com)
6 This file is part of groff.
8 groff is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 groff is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with groff; see the file COPYING. If not, write to the Free Software
20 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
23 #define MUST_ALREADY_EXIST 2
26 static const char **table;
27 static int table_used;
28 static int table_size;
30 static int block_size;
33 symbol(const char *p, int how = 0);
35 unsigned long hash() const;
36 int operator ==(symbol) const;
37 int operator !=(symbol) const;
38 const char *contents() const;
44 extern const symbol NULL_SYMBOL;
45 extern const symbol EMPTY_SYMBOL;
47 inline symbol::symbol() : s(0)
51 inline int symbol::operator==(symbol p) const
56 inline int symbol::operator!=(symbol p) const
61 inline unsigned long symbol::hash() const
63 return (unsigned long)s;
66 inline const char *symbol::contents() const
71 inline int symbol::is_null() const
76 inline int symbol::is_empty() const
78 return s != 0 && *s == 0;
81 symbol concat(symbol, symbol);
83 extern symbol default_symbol;