mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-24 09:13:37 +01:00
41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/*
|
|
* definitions for dc's "register" declarations
|
|
*
|
|
* Copyright (C) 1994 Free Software Foundation, Inc.
|
|
*
|
|
* This program 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 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program 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, you can either send email to this
|
|
* program's author (see below) or write to: The Free Software Foundation,
|
|
* Inc.; 675 Mass Ave. Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_LIMITS_H
|
|
# include <limits.h> /* UCHAR_MAX */
|
|
#endif
|
|
|
|
/* determine how many register stacks there are */
|
|
#ifndef DC_REGCOUNT
|
|
# ifndef UCHAR_MAX
|
|
# define DC_REGCOUNT 256
|
|
# else
|
|
# define DC_REGCOUNT (UCHAR_MAX+1)
|
|
# endif
|
|
#endif /* not DC_REGCOUNT */
|
|
|
|
/* efficiency hack for masking arbritrary integers to 0..(DC_REGCOUNT-1) */
|
|
#if (DC_REGCOUNT & (DC_REGCOUNT-1)) == 0 /* DC_REGCOUNT is power of 2 */
|
|
# define regmap(r) ((r) & (DC_REGCOUNT-1))
|
|
#else
|
|
# define regmap(r) ((r) % DC_REGCOUNT)
|
|
#endif
|