Line data    Source code

       1             : /* Copyright (C) 1989-2020 Free Software Foundation, Inc.
       2             :      Written by James Clark (jjc@jclark.com)
       3             : 
       4             : This file is part of groff, the GNU roff typesetting system.
       5             : 
       6             : groff is free software; you can redistribute it and/or modify it under
       7             : the terms of the GNU General Public License as published by the Free
       8             : Software Foundation, either version 3 of the License, or
       9             : (at your option) any later version.
      10             : 
      11             : groff is distributed in the hope that it will be useful, but WITHOUT ANY
      12             : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      13             : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      14             : for more details.
      15             : 
      16             : You should have received a copy of the GNU General Public License
      17             : along with this program.  If not, see <http://www.gnu.org/licenses/>. */
      18             : 
      19             : class reference_id {
      20             :   int filename_id;
      21             :   int pos;
      22             : public:
      23           5 :   reference_id() : filename_id(-1) { }
      24           0 :   reference_id(int fid, int off) : filename_id(fid), pos(off) { }
      25           0 :   unsigned hash() const { return (filename_id << 4) + pos; }
      26           0 :   int is_null() const { return filename_id < 0; }
      27             :   friend inline int operator==(const reference_id &, const reference_id &);
      28             : };
      29             : 
      30           0 : inline int operator==(const reference_id &r1, const reference_id &r2)
      31             : {
      32           0 :   return r1.filename_id == r2.filename_id && r1.pos == r2.pos;
      33             : }
      34             : 
      35             : // Local Variables:
      36             : // fill-column: 72
      37             : // mode: C++
      38             : // End:
      39             : // vim: set cindent noexpandtab shiftwidth=2 textwidth=72: