1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* Copyright (C) 1991, 1992, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/*
* ANSI Standard: 4.14/2.2.4.2 Limits of integral types <limits.h>
*/
#include <features.h>
#ifdef __USE_POSIX
/* POSIX adds things to <limits.h>. */
#include <posix1_lim.h>
#endif
#ifdef __USE_POSIX2
#include <posix2_lim.h>
#endif
#if __GNUC__ >= 2
/* Get the compiler's limits.h, which defines all the ANSI constants. */
#ifndef _LIBC_LIMITS_H_
#define _LIBC_LIMITS_H_ /* This tells it not to look for another. */
#endif
#ifndef _GCC_LIMITS_H_ /* This is what GCC's file defines. */
#include_next <limits.h>
#endif
#else /* Not GCC 2. */
/* We only protect from multiple inclusion here, because all the other
#include's protect themselves, and in GCC 2 we may #include_next through
multiple copies of this file before we get to GCC's. */
#ifndef _LIMITS_H
#define _LIMITS_H
/* We don't have #include_next.
Define ANSI <limits.h> for standard 32-bit words. */
/* These assume 8-bit `char's, 16-bit `short int's,
and 32-bit `int's and `long int's. */
/* Number of bits in a `char'. */
#define CHAR_BIT 8
/* Maximum length of any multibyte character in any locale. */
#define MB_LEN_MAX 6
/* Minimum and maximum values a `signed char' can hold. */
#define SCHAR_MIN (-128)
#define SCHAR_MAX 127
/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */
#ifdef __STDC__
#define UCHAR_MAX 255U
#else
#define UCHAR_MAX 255
#endif
/* Minimum and maximum values a `char' can hold. */
#ifdef __CHAR_UNSIGNED__
#define CHAR_MIN 0
#define CHAR_MAX UCHAR_MAX
#else
#define CHAR_MIN SCHAR_MIN
#define CHAR_MAX SCHAR_MAX
#endif
/* Minimum and maximum values a `signed short int' can hold. */
#define SHRT_MIN (-32768)
#define SHRT_MAX 32767
/* Maximum value an `unsigned short int' can hold. (Minimum is 0.) */
#define USHRT_MAX 65535
/* Minimum and maximum values a `signed int' can hold. */
#define INT_MIN (- INT_MAX - 1)
#define INT_MAX 2147483647
/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */
#ifdef __STDC__
#define UINT_MAX 4294967295U
#else
#define UINT_MAX 4294967295
#endif
#ifdef __alpha__
/* Minimum and maximum values a `signed long int' can hold. */
#define LONG_MAX 9223372036854775807L
#define LONG_MIN (- LONG_MAX - 1L)
/* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */
#define ULONG_MAX 18446744073709551615L
#else
/* Minimum and maximum values a `signed long int' can hold. */
#define LONG_MAX INT_MAX
#define LONG_MIN INT_MIN
/* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */
#define ULONG_MAX UINT_MAX
#endif
#endif /* limits.h */
#endif /* GCC 2. */
|
