2 /* Copyright (C) 1989-2018 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 3 of the License, or
10 (at your option) any later version.
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
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 reference_id() : filename_id(-1) { }
25 reference_id(int fid, int off) : filename_id(fid), pos(off) { }
26 unsigned hash() const { return (filename_id << 4) + pos; }
27 int is_null() const { return filename_id < 0; }
28 friend inline int operator==(const reference_id &, const reference_id &);
31 inline int operator==(const reference_id &r1, const reference_id &r2)
33 return r1.filename_id == r2.filename_id && r1.pos == r2.pos;