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36 lines
1.3 KiB
C++
36 lines
1.3 KiB
C++
// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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class reference_id {
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int filename_id;
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int pos;
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public:
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reference_id() : filename_id(-1) { }
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reference_id(int fid, int off) : filename_id(fid), pos(off) { }
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unsigned hash() const { return (filename_id << 4) + pos; }
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int is_null() const { return filename_id < 0; }
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friend inline int operator==(const reference_id &, const reference_id &);
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};
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inline int operator==(const reference_id &r1, const reference_id &r2)
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{
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return r1.filename_id == r2.filename_id && r1.pos == r2.pos;
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}
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