1/* $OpenBSD: limits.h,v 1.6 2005/12/13 00:35:23 millert Exp $ */
2/*
3 * Copyright (c) 2002 Marc Espie.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OPENBSD
18 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26#ifndef _SYS_LIMITS_H_
27#define _SYS_LIMITS_H_
28
29#include <sys/cdefs.h>
30#include <linux/limits.h>
31
32/* Common definitions for limits.h. */
33
34/*
35 * <machine/internal_types.h> is meant to describe a specific architecture,
36 * but to be a safe include, that doesn't ever define anything that is
37 * user-visible (only typedefs and #define names that stays in the __xxx
38 * namespace).
39 *
40 *   __machine_has_unsigned_chars	(default is signed chars)
41 *   __FLT_xxx/__DBL_xxx		non standard values for floating
42 *   					points limits.
43 */
44#include <machine/internal_types.h>
45
46/* Legacy */
47#include <machine/limits.h>
48
49#define	CHAR_BIT	8		/* number of bits in a char */
50
51#define	SCHAR_MAX	0x7f		/* max value for a signed char */
52#define SCHAR_MIN	(-0x7f-1)	/* min value for a signed char */
53
54#define	UCHAR_MAX	0xffU		/* max value for an unsigned char */
55#ifdef __machine_has_unsigned_chars
56# define CHAR_MIN	0		/* min value for a char */
57# define CHAR_MAX	0xff		/* max value for a char */
58#else
59# define CHAR_MAX	0x7f
60# define CHAR_MIN	(-0x7f-1)
61#endif
62
63#define	USHRT_MAX	0xffffU		/* max value for an unsigned short */
64#define	SHRT_MAX	0x7fff		/* max value for a short */
65#define SHRT_MIN        (-0x7fff-1)     /* min value for a short */
66
67#define	UINT_MAX	0xffffffffU	/* max value for an unsigned int */
68#define	INT_MAX		0x7fffffff	/* max value for an int */
69#define	INT_MIN		(-0x7fffffff-1)	/* min value for an int */
70
71#ifdef __LP64__
72# define ULONG_MAX	0xffffffffffffffffUL
73					/* max value for unsigned long */
74# define LONG_MAX	0x7fffffffffffffffL
75					/* max value for a signed long */
76# define LONG_MIN	(-0x7fffffffffffffffL-1)
77					/* min value for a signed long */
78#else
79# define ULONG_MAX	0xffffffffUL	/* max value for an unsigned long */
80# define LONG_MAX	0x7fffffffL	/* max value for a long */
81# define LONG_MIN	(-0x7fffffffL-1)/* min value for a long */
82#endif
83
84#if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999
85# define ULLONG_MAX	0xffffffffffffffffULL
86					/* max value for unsigned long long */
87# define LLONG_MAX	0x7fffffffffffffffLL
88					/* max value for a signed long long */
89# define LLONG_MIN	(-0x7fffffffffffffffLL-1)
90					/* min value for a signed long long */
91#endif
92
93#if __BSD_VISIBLE
94# define UID_MAX	UINT_MAX	/* max value for a uid_t */
95# define GID_MAX	UINT_MAX	/* max value for a gid_t */
96#endif
97
98
99#ifdef __LP64__
100# define LONG_BIT	64
101#else
102# define LONG_BIT	32
103#endif
104
105/* float.h defines these as well */
106# if !defined(DBL_DIG)
107#  if defined(__DBL_DIG)
108#   define DBL_DIG	__DBL_DIG
109#   define DBL_MAX	__DBL_MAX
110#   define DBL_MIN	__DBL_MIN
111
112#   define FLT_DIG	__FLT_DIG
113#   define FLT_MAX	__FLT_MAX
114#   define FLT_MIN	__FLT_MIN
115#  else
116#   define DBL_DIG	15
117#   define DBL_MAX	1.7976931348623157E+308
118#   define DBL_MIN	2.2250738585072014E-308
119
120#   define FLT_DIG	6
121#   define FLT_MAX	3.40282347E+38F
122#   define FLT_MIN	1.17549435E-38F
123#  endif
124# endif
125
126/* Bionic: the following has been optimized out from our processed kernel headers */
127
128#define  CHILD_MAX   999
129#define  OPEN_MAX    256
130
131/* Bionic-specific definitions */
132
133#define  _POSIX_VERSION             200112L   /* Posix C language bindings version */
134#define  _POSIX2_VERSION            -1        /* we don't support Posix command-line tools */
135#define  _POSIX2_C_VERSION          _POSIX_VERSION
136#define  _XOPEN_VERSION             500       /* by Posix definition */
137#define  _XOPEN_XCU_VERSION         -1        /* we don't support command-line utilities */
138
139/* tell what we implement legacy stuff when appropriate */
140#if _POSIX_VERSION > 0
141#define  _XOPEN_XPG2                1
142#define  _XOPEN_XPG3                1
143#define  _XOPEN_XPG4                1
144#define  _XOPEN_UNIX                1
145#endif
146
147#define  _XOPEN_ENH_I18N          -1  /* we don't support internationalization in the C library */
148#define  _XOPEN_CRYPT             -1  /* don't support X/Open Encryption */
149#define  _XOPEN_LEGACY            -1  /* don't claim we support these, we have some of them but not all */
150#define  _XOPEN_REALTIME          -1 /* we don't support all these functions */
151#define  _XOPEN_REALTIME_THREADS  -1  /* same here */
152
153#define  _POSIX_REALTIME_SIGNALS    -1  /* for now, this is not supported */
154#define  _POSIX_PRIORITY_SCHEDULING  1  /* priority scheduling is a Linux feature */
155#define  _POSIX_TIMERS               1  /* Posix timers are supported */
156#undef   _POSIX_ASYNCHRONOUS_IO         /* aio_ functions are not supported */
157#define  _POSIX_SYNCHRONIZED_IO      1  /* synchronized i/o supported */
158#define  _POSIX_FSYNC                1  /* fdatasync() supported */
159#define  _POSIX_MAPPED_FILES         1  /* mmap-ed files supported */
160
161/* XXX: TODO: complete and check list here */
162
163
164#define  _POSIX_THREADS             1    /* we support threads */
165#define  _POSIX_THREAD_STACKADDR    1    /* we support thread stack address */
166#define  _POSIX_THREAD_STACKSIZE    1    /* we support thread stack size */
167#define  _POSIX_THREAD_PRIO_INHERIT 200112L   /* linux feature */
168#define  _POSIX_THREAD_PRIO_PROTECT 200112L   /* linux feature */
169
170#undef   _POSIX_PROCESS_SHARED           /* we don't support process-shared synchronization */
171#undef   _POSIX_THREAD_SAFE_FUNCTIONS    /* most functions are, but not everything yet */
172#define  _POSIX_CHOWN_RESTRICTED    1    /* yes, chown requires appropriate priviledges */
173#define  _POSIX_NO_TRUNC            1    /* very long pathnames generate an error */
174#define  _POSIX_SAVED_IDS           1    /* saved user ids is a Linux feature */
175#define  _POSIX_JOB_CONTROL         1    /* job control is a Linux feature */
176
177
178
179#endif
180