1 | /* Compatibility header for old-style Unix parameters and limits. |
2 | Copyright (C) 1995-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _SYS_PARAM_H |
20 | #define _SYS_PARAM_H 1 |
21 | |
22 | #define __need_NULL |
23 | #include <stddef.h> |
24 | |
25 | #include <sys/types.h> |
26 | #include <limits.h> |
27 | #include <endian.h> /* Define BYTE_ORDER et al. */ |
28 | #include <signal.h> /* Define NSIG. */ |
29 | |
30 | /* This file defines some things in system-specific ways. */ |
31 | #include <bits/param.h> |
32 | |
33 | |
34 | /* BSD names for some <limits.h> values. */ |
35 | |
36 | #define NBBY CHAR_BIT |
37 | |
38 | #if !defined NGROUPS && defined NGROUPS_MAX |
39 | # define NGROUPS NGROUPS_MAX |
40 | #endif |
41 | #if !defined MAXSYMLINKS && defined SYMLOOP_MAX |
42 | # define MAXSYMLINKS SYMLOOP_MAX |
43 | #endif |
44 | #if !defined CANBSIZ && defined MAX_CANON |
45 | # define CANBSIZ MAX_CANON |
46 | #endif |
47 | #if !defined MAXPATHLEN && defined PATH_MAX |
48 | # define MAXPATHLEN PATH_MAX |
49 | #endif |
50 | #if !defined NOFILE && defined OPEN_MAX |
51 | # define NOFILE OPEN_MAX |
52 | #endif |
53 | #if !defined MAXHOSTNAMELEN && defined HOST_NAME_MAX |
54 | # define MAXHOSTNAMELEN HOST_NAME_MAX |
55 | #endif |
56 | #ifndef NCARGS |
57 | # ifdef ARG_MAX |
58 | # define NCARGS ARG_MAX |
59 | # else |
60 | /* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to |
61 | compare against some fixed limit. */ |
62 | # define NCARGS INT_MAX |
63 | # endif |
64 | #endif |
65 | |
66 | |
67 | /* Magical constants. */ |
68 | #ifndef NOGROUP |
69 | # define NOGROUP 65535 /* Marker for empty group set member. */ |
70 | #endif |
71 | #ifndef NODEV |
72 | # define NODEV ((dev_t) -1) /* Non-existent device. */ |
73 | #endif |
74 | |
75 | |
76 | /* Unit of `st_blocks'. */ |
77 | #ifndef DEV_BSIZE |
78 | # define DEV_BSIZE 512 |
79 | #endif |
80 | |
81 | |
82 | /* Bit map related macros. */ |
83 | #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) |
84 | #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) |
85 | #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) |
86 | #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) |
87 | |
88 | /* Macros for counting and rounding. */ |
89 | #ifndef howmany |
90 | # define howmany(x, y) (((x) + ((y) - 1)) / (y)) |
91 | #endif |
92 | #ifdef __GNUC__ |
93 | # define roundup(x, y) (__builtin_constant_p (y) && powerof2 (y) \ |
94 | ? (((x) + (y) - 1) & ~((y) - 1)) \ |
95 | : ((((x) + ((y) - 1)) / (y)) * (y))) |
96 | #else |
97 | # define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) |
98 | #endif |
99 | #define powerof2(x) ((((x) - 1) & (x)) == 0) |
100 | |
101 | /* Macros for min/max. */ |
102 | #define MIN(a,b) (((a)<(b))?(a):(b)) |
103 | #define MAX(a,b) (((a)>(b))?(a):(b)) |
104 | |
105 | |
106 | #endif /* sys/param.h */ |
107 | |