limits.h revision 1.6 1 /* $NetBSD: limits.h,v 1.6 1994/10/26 21:09:43 cgd Exp $ */
2
3 /*
4 * Copyright (c) 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)limits.h 8.3 (Berkeley) 1/4/94
36 */
37
38 #define CHAR_BIT 8 /* number of bits in a char */
39 #define MB_LEN_MAX 6 /* Allow 31 bit UTF2 */
40
41
42 #define CLK_TCK 60 /* ticks per second */
43
44 /*
45 * According to ANSI (section 2.2.4.2), the values below must be usable by
46 * #if preprocessing directives. Additionally, the expression must have the
47 * same type as would an expression that is an object of the corresponding
48 * type converted according to the integral promotions. The subtraction for
49 * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
50 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
51 * These numbers work for pcc as well. The UINT_MAX and ULONG_MAX values
52 * are written as hex so that GCC will be quiet about large integer constants.
53 */
54 #define SCHAR_MAX 127 /* min value for a signed char */
55 #define SCHAR_MIN (-128) /* max value for a signed char */
56
57 #define UCHAR_MAX 255 /* max value for an unsigned char */
58 #define CHAR_MAX 127 /* max value for a char */
59 #define CHAR_MIN (-128) /* min value for a char */
60
61 #define USHRT_MAX 65535 /* max value for an unsigned short */
62 #define SHRT_MAX 32767 /* max value for a short */
63 #define SHRT_MIN (-32768) /* min value for a short */
64
65 #define UINT_MAX 0xffffffff /* max value for an unsigned int */
66 #define INT_MAX 2147483647 /* max value for an int */
67 #define INT_MIN (-2147483647-1) /* min value for an int */
68
69 #define ULONG_MAX 0xffffffff /* max value for an unsigned long */
70 #define LONG_MAX 2147483647 /* max value for a long */
71 #define LONG_MIN (-2147483647-1) /* min value for a long */
72
73 #if !defined(_ANSI_SOURCE)
74 #define SSIZE_MAX INT_MAX /* max value for a ssize_t */
75
76 #if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE)
77 #define SIZE_T_MAX UINT_MAX /* max value for a size_t */
78
79 /* GCC requires that quad constants be written as expressions. */
80 #define UQUAD_MAX ((u_quad_t)0-1) /* max value for a uquad_t */
81 /* max value for a quad_t */
82 #define QUAD_MAX ((quad_t)(UQUAD_MAX >> 1))
83 #define QUAD_MIN (-QUAD_MAX-1) /* min value for a quad_t */
84
85 #endif /* !_POSIX_SOURCE && !_XOPEN_SOURCE */
86 #endif /* !_ANSI_SOURCE */
87
88 #if (!defined(_ANSI_SOURCE)&&!defined(_POSIX_SOURCE)) || defined(_XOPEN_SOURCE)
89 #define LONG_BIT 32
90 #define WORD_BIT 32
91
92 #define DBL_DIG 15
93 #define DBL_MAX 1.797693134862316E+308
94 #define DBL_MIN 2.225073858507201E-308
95
96 #define FLT_DIG 6
97 #define FLT_MAX 3.40282347E+38F
98 #define FLT_MIN 1.17549435E-38F
99 #endif
100