freebsd-dev/contrib/groff/troff/symbol.h
1996-09-07 16:18:32 +00:00

74 lines
1.6 KiB
C++

// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define DONT_STORE 1
#define MUST_ALREADY_EXIST 2
class symbol {
static const char **table;
static int table_used;
static int table_size;
static char *block;
static int block_size;
const char *s;
public:
symbol(const char *p, int how = 0);
symbol();
unsigned long hash() const;
int operator ==(symbol) const;
int operator !=(symbol) const;
const char *contents() const;
int is_null() const;
};
extern const symbol NULL_SYMBOL;
inline symbol::symbol() : s(0)
{
}
inline int symbol::operator==(symbol p) const
{
return s == p.s;
}
inline int symbol::operator!=(symbol p) const
{
return s != p.s;
}
inline unsigned long symbol::hash() const
{
return (unsigned long)s;
}
inline const char *symbol::contents() const
{
return s;
}
inline int symbol::is_null() const
{
return s == 0;
}
symbol concat(symbol, symbol);