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limits.h
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1 /***
2 *limits.h - implementation dependent values
3 *
4 * Copyright (c) Microsoft Corporation. All rights reserved.
5 *
6 *Purpose:
7 * Contains defines for a number of implementation dependent values
8 * which are commonly used in C programs.
9 * [ANSI]
10 *
11 * [Public]
12 *
13 ****/
14 
15 #pragma once
16 
17 #include <crtdefs.h>
18 
19 #ifndef _INC_LIMITS
20 #define _INC_LIMITS
21 
22 #define CHAR_BIT 8 /* number of bits in a char */
23 #define SCHAR_MIN (-128) /* minimum signed char value */
24 #define SCHAR_MAX 127 /* maximum signed char value */
25 #define UCHAR_MAX 0xff /* maximum unsigned char value */
26 
27 #ifndef _CHAR_UNSIGNED
28 #define CHAR_MIN SCHAR_MIN /* mimimum char value */
29 #define CHAR_MAX SCHAR_MAX /* maximum char value */
30 #else /* _CHAR_UNSIGNED */
31 #define CHAR_MIN 0
32 #define CHAR_MAX UCHAR_MAX
33 #endif /* _CHAR_UNSIGNED */
34 
35 #define MB_LEN_MAX 5 /* max. # bytes in multibyte char */
36 #define SHRT_MIN (-32768) /* minimum (signed) short value */
37 #define SHRT_MAX 32767 /* maximum (signed) short value */
38 #define USHRT_MAX 0xffff /* maximum unsigned short value */
39 #define INT_MIN (-2147483647 - 1) /* minimum (signed) int value */
40 #define INT_MAX 2147483647 /* maximum (signed) int value */
41 #define UINT_MAX 0xffffffff /* maximum unsigned int value */
42 #define LONG_MIN (-2147483647L - 1) /* minimum (signed) long value */
43 #define LONG_MAX 2147483647L /* maximum (signed) long value */
44 #define ULONG_MAX 0xffffffffUL /* maximum unsigned long value */
45 #define LLONG_MAX 9223372036854775807i64 /* maximum signed long long int value */
46 #define LLONG_MIN (-9223372036854775807i64 - 1) /* minimum signed long long int value */
47 #define ULLONG_MAX 0xffffffffffffffffui64 /* maximum unsigned long long int value */
48 
49 #define _I8_MIN (-127i8 - 1) /* minimum signed 8 bit value */
50 #define _I8_MAX 127i8 /* maximum signed 8 bit value */
51 #define _UI8_MAX 0xffui8 /* maximum unsigned 8 bit value */
52 
53 #define _I16_MIN (-32767i16 - 1) /* minimum signed 16 bit value */
54 #define _I16_MAX 32767i16 /* maximum signed 16 bit value */
55 #define _UI16_MAX 0xffffui16 /* maximum unsigned 16 bit value */
56 
57 #define _I32_MIN (-2147483647i32 - 1) /* minimum signed 32 bit value */
58 #define _I32_MAX 2147483647i32 /* maximum signed 32 bit value */
59 #define _UI32_MAX 0xffffffffui32 /* maximum unsigned 32 bit value */
60 
61 /* minimum signed 64 bit value */
62 #define _I64_MIN (-9223372036854775807i64 - 1)
63 /* maximum signed 64 bit value */
64 #define _I64_MAX 9223372036854775807i64
65 /* maximum unsigned 64 bit value */
66 #define _UI64_MAX 0xffffffffffffffffui64
67 
68 #if _INTEGRAL_MAX_BITS >= 128
69 /* minimum signed 128 bit value */
70 #define _I128_MIN (-170141183460469231731687303715884105727i128 - 1)
71 /* maximum signed 128 bit value */
72 #define _I128_MAX 170141183460469231731687303715884105727i128
73 /* maximum unsigned 128 bit value */
74 #define _UI128_MAX 0xffffffffffffffffffffffffffffffffui128
75 #endif /* _INTEGRAL_MAX_BITS >= 128 */
76 
77 #ifndef SIZE_MAX
78 #ifdef _WIN64
79 #define SIZE_MAX _UI64_MAX
80 #else /* _WIN64 */
81 #define SIZE_MAX UINT_MAX
82 #endif /* _WIN64 */
83 #endif /* SIZE_MAX */
84 
85 #if __STDC_WANT_SECURE_LIB__
86 #ifndef RSIZE_MAX
87 #define RSIZE_MAX (SIZE_MAX >> 1)
88 #endif /* RSIZE_MAX */
89 #endif /* __STDC_WANT_SECURE_LIB__ */
90 
91 
92 #endif /* _INC_LIMITS */