Annotation of sys/sys/limits.h, Revision 1.1.1.1
1.1 nbrk 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
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