| /* Definitions of macros to access `dev_t' values. Hurd version. |
| Copyright (C) 1996-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _BITS_SYSMACROS_H |
| #define _BITS_SYSMACROS_H 1 |
| |
| #ifndef _SYS_SYSMACROS_H |
| # error "Never include <bits/sysmacros.h> directly; use <sys/sysmacros.h> instead." |
| #endif |
| |
| /* The Hurd version of dev_t in glibc is a 32-bit quantity, with 8-bit |
| major and 24-bit minor numbers. The encoding is mmmmMMmm, where M is a |
| hex digit of the major number and m is a hex digit of the minor number. */ |
| |
| #define __SYSMACROS_DECLARE_MAJOR(DECL_TEMPL) \ |
| DECL_TEMPL(unsigned int, major, (__dev_t __dev)) |
| |
| #define __SYSMACROS_DEFINE_MAJOR(DECL_TEMPL) \ |
| __SYSMACROS_DECLARE_MAJOR (DECL_TEMPL) \ |
| { \ |
| return ((__dev & (__dev_t) 0x0000ff00u) >> 8); \ |
| } |
| |
| #define __SYSMACROS_DECLARE_MINOR(DECL_TEMPL) \ |
| DECL_TEMPL(unsigned int, minor, (__dev_t __dev)) |
| |
| #define __SYSMACROS_DEFINE_MINOR(DECL_TEMPL) \ |
| __SYSMACROS_DECLARE_MINOR (DECL_TEMPL) \ |
| { \ |
| return (__dev & (__dev_t) 0xffff00ff); \ |
| } |
| |
| #define __SYSMACROS_DECLARE_MAKEDEV(DECL_TEMPL) \ |
| DECL_TEMPL(__dev_t, makedev, (unsigned int __major, unsigned int __minor)) |
| |
| #define __SYSMACROS_DEFINE_MAKEDEV(DECL_TEMPL) \ |
| __SYSMACROS_DECLARE_MAKEDEV (DECL_TEMPL) \ |
| { \ |
| __dev_t __dev; \ |
| __dev = (((__dev_t) (__major & 0x000000ffu)) << 8); \ |
| __dev |= (((__dev_t) (__minor & 0xffff00ffu)) << 0); \ |
| return __dev; \ |
| } |
| |
| #endif /* bits/sysmacros.h */ |