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- // -*- 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- class reference_id {
- int filename_id;
- int pos;
- public:
- reference_id() : filename_id(-1) { }
- reference_id(int fid, int off) : filename_id(fid), pos(off) { }
- unsigned hash() const { return (filename_id << 4) + pos; }
- int is_null() const { return filename_id < 0; }
- friend inline int operator==(const reference_id &, const reference_id &);
- };
-
- inline int operator==(const reference_id &r1, const reference_id &r2)
- {
- return r1.filename_id == r2.filename_id && r1.pos == r2.pos;
- }
-