77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
// -*- 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, 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: symbol.h,v 1.3 1993/08/02 17:45:40 mycroft Exp $
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*/
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#define DONT_STORE 1
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#define MUST_ALREADY_EXIST 2
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class symbol {
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static const char **table;
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static int table_used;
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static int table_size;
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static char *block;
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static int block_size;
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const char *s;
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public:
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symbol(const char *p, int how = 0);
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symbol();
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unsigned long hash() const;
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operator ==(symbol) const;
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operator !=(symbol) const;
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const char *contents() const;
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int is_null() const;
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};
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extern const symbol NULL_SYMBOL;
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inline symbol::symbol() : s(0)
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{
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}
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inline int symbol::operator==(symbol p) const
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{
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return s == p.s;
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}
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inline int symbol::operator!=(symbol p) const
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{
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return s != p.s;
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}
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inline unsigned long symbol::hash() const
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{
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return (unsigned long)s;
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}
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inline const char *symbol::contents() const
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{
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return s;
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}
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inline int symbol::is_null() const
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{
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return s == 0;
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}
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symbol concat(symbol, symbol);
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