1 /* $NetBSD: refid.h,v 1.1.1.1 2016/01/13 18:41:48 christos Exp $ */ 2 3 // -*- C++ -*- 4 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc. 5 Written by James Clark (jjc@jclark.com) 6 7 This file is part of groff. 8 9 groff is free software; you can redistribute it and/or modify it under 10 the terms of the GNU General Public License as published by the Free 11 Software Foundation; either version 2, or (at your option) any later 12 version. 13 14 groff is distributed in the hope that it will be useful, but WITHOUT ANY 15 WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 for more details. 18 19 You should have received a copy of the GNU General Public License along 20 with groff; see the file COPYING. If not, write to the Free Software 21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 class reference_id { 24 int filename_id; 25 int pos; 26 public: reference_id()27 reference_id() : filename_id(-1) { } reference_id(int fid,int off)28 reference_id(int fid, int off) : filename_id(fid), pos(off) { } hash()29 unsigned hash() const { return (filename_id << 4) + pos; } is_null()30 int is_null() const { return filename_id < 0; } 31 friend inline int operator==(const reference_id &, const reference_id &); 32 }; 33 34 inline int operator==(const reference_id &r1, const reference_id &r2) 35 { 36 return r1.filename_id == r2.filename_id && r1.pos == r2.pos; 37 } 38