1 /* $OpenBSD: limits.h,v 1.7 2007/05/07 15:29:44 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
31 /* Common definitions for limits.h. */
32
33 /*
34 * <machine/internal_types.h> is meant to describe a specific architecture,
35 * but to be a safe include, that doesn't ever define anything that is
36 * user-visible (only typedefs and #define names that stays in the __xxx
37 * namespace).
38 *
39 * __machine_has_unsigned_chars (default is signed chars)
40 * __FLT_xxx/__DBL_xxx non standard values for floating
41 * points limits.
42 */
43 #include <machine/internal_types.h>
44
45 /* Legacy */
46 #include <machine/limits.h>
47
48 #define CHAR_BIT 8 /* number of bits in a char */
49
50 #define SCHAR_MAX 0x7f /* max value for a signed char */
51 #define SCHAR_MIN (-0x7f-1) /* min value for a signed char */
52
53 #define UCHAR_MAX 0xff /* max value for an unsigned char */
54 #ifdef __machine_has_unsigned_chars
55 # define CHAR_MIN 0 /* min value for a char */
56 # define CHAR_MAX 0xff /* max value for a char */
57 #else
58 # define CHAR_MAX 0x7f
59 # define CHAR_MIN (-0x7f-1)
60 #endif
61
62 #define USHRT_MAX 0xffff /* max value for an unsigned short */
63 #define SHRT_MAX 0x7fff /* max value for a short */
64 #define SHRT_MIN (-0x7fff-1) /* min value for a short */
65
66 #define UINT_MAX 0xffffffffU /* max value for an unsigned int */
67 #define INT_MAX 0x7fffffff /* max value for an int */
68 #define INT_MIN (-0x7fffffff-1) /* min value for an int */
69
70 #ifdef __LP64__
71 # define ULONG_MAX 0xffffffffffffffffUL
72 /* max value for unsigned long */
73 # define LONG_MAX 0x7fffffffffffffffL
74 /* max value for a signed long */
75 # define LONG_MIN (-0x7fffffffffffffffL-1)
76 /* min value for a signed long */
77 #else
78 # define ULONG_MAX 0xffffffffUL /* max value for an unsigned long */
79 # define LONG_MAX 0x7fffffffL /* max value for a long */
80 # define LONG_MIN (-0x7fffffffL-1)/* min value for a long */
81 #endif
82
83 #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999
84 # define ULLONG_MAX 0xffffffffffffffffULL
85 /* max value for unsigned long long */
86 # define LLONG_MAX 0x7fffffffffffffffLL
87 /* max value for a signed long long */
88 # define LLONG_MIN (-0x7fffffffffffffffLL-1)
89 /* min value for a signed long long */
90 #endif
91
92 #if __BSD_VISIBLE
93 # define UID_MAX UINT_MAX /* max value for a uid_t */
94 # define GID_MAX UINT_MAX /* max value for a gid_t */
95 #endif
96
97
98 #if __XPG_VISIBLE
99 # ifdef __LP64__
100 # define LONG_BIT 64
101 # else
102 # define LONG_BIT 32
103 # endif
104 # define WORD_BIT 32
105
106 /* float.h defines these as well */
107 # if !defined(DBL_DIG)
108 # if defined(__DBL_DIG)
109 # define DBL_DIG __DBL_DIG
110 # define DBL_MAX __DBL_MAX
111 # define DBL_MIN __DBL_MIN
112
113 # define FLT_DIG __FLT_DIG
114 # define FLT_MAX __FLT_MAX
115 # define FLT_MIN __FLT_MIN
116 # else
117 # define DBL_DIG 15
118 # define DBL_MAX 1.7976931348623157E+308
119 # define DBL_MIN 2.2250738585072014E-308
120
121 # define FLT_DIG 6
122 # define FLT_MAX 3.40282347E+38F
123 # define FLT_MIN 1.17549435E-38F
124 # endif
125 # endif
126 #endif
127
128 #endif