2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
3 Written by James Clark (jjc@jclark.com)
5 This file is part of groff.
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
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
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 reference_id() : filename_id(-1) { }
26 reference_id(int fid
, int off
) : filename_id(fid
), pos(off
) { }
27 unsigned hash() const { return (filename_id
<< 4) + pos
; }
28 int is_null() const { return filename_id
< 0; }
29 friend inline int operator==(const reference_id
&, const reference_id
&);
32 inline int operator==(const reference_id
&r1
, const reference_id
&r2
)
34 return r1
.filename_id
== r2
.filename_id
&& r1
.pos
== r2
.pos
;