| 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-3-Clause |
| 3 | * |
| 4 | * Copyright (c) 1982, 1986, 1989, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * (c) UNIX System Laboratories, Inc. |
| 7 | */ |
| 8 | |
| 9 | #ifndef _SYS__PARAM_H_ |
| 10 | #define _SYS__PARAM_H_ |
| 11 | |
| 12 | #define NBBY 8 /* number of bits in a byte */ |
| 13 | #define NBPW sizeof(int) /* number of bytes per word (integer) */ |
| 14 | |
| 15 | /* |
| 16 | * Macros for counting and rounding. |
| 17 | */ |
| 18 | #define nitems(x) (sizeof((x)) / sizeof((x)[0])) |
| 19 | #ifndef howmany |
| 20 | #define howmany(x, y) (((x)+((y)-1))/(y)) |
| 21 | #endif |
| 22 | #define rounddown(x, y) (((x)/(y))*(y)) |
| 23 | #define rounddown2(x, y) __align_down(x, y) /* if y is power of two */ |
| 24 | #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ |
| 25 | #define roundup2(x, y) __align_up(x, y) /* if y is powers of two */ |
| 26 | #define powerof2(x) ((((x)-1)&(x))==0) |
| 27 | |
| 28 | #endif /* _SYS__PARAM_H_ */ |