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// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992, 2009
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 3 of the License, 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 this program. If not, see <http://www.gnu.org/licenses/>. */
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;
}
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