1/*
2 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#ifndef OSSL_INTERNAL_NUMBERS_H
11# define OSSL_INTERNAL_NUMBERS_H
12# pragma once
13
14# include <limits.h>
15
16# if (-1 & 3) == 0x03           /* Two's complement */
17
18#  define __MAXUINT__(T) ((T) -1)
19#  define __MAXINT__(T) ((T) ((((T) 1) << ((sizeof(T) * CHAR_BIT) - 1)) ^ __MAXUINT__(T)))
20#  define __MININT__(T) (-__MAXINT__(T) - 1)
21
22# elif (-1 & 3) == 0x02         /* One's complement */
23
24#  define __MAXUINT__(T) (((T) -1) + 1)
25#  define __MAXINT__(T) ((T) ((((T) 1) << ((sizeof(T) * CHAR_BIT) - 1)) ^ __MAXUINT__(T)))
26#  define __MININT__(T) (-__MAXINT__(T))
27
28# elif (-1 & 3) == 0x01         /* Sign/magnitude */
29
30#  define __MAXINT__(T) ((T) (((((T) 1) << ((sizeof(T) * CHAR_BIT) - 2)) - 1) | (((T) 1) << ((sizeof(T) * CHAR_BIT) - 2))))
31#  define __MAXUINT__(T) ((T) (__MAXINT__(T) | (((T) 1) << ((sizeof(T) * CHAR_BIT) - 1))))
32#  define __MININT__(T) (-__MAXINT__(T))
33
34# else
35
36#  error "do not know the integer encoding on this architecture"
37
38# endif
39
40# ifndef INT8_MAX
41#  define INT8_MIN __MININT__(int8_t)
42#  define INT8_MAX __MAXINT__(int8_t)
43#  define UINT8_MAX __MAXUINT__(uint8_t)
44# endif
45
46# ifndef INT16_MAX
47#  define INT16_MIN __MININT__(int16_t)
48#  define INT16_MAX __MAXINT__(int16_t)
49#  define UINT16_MAX __MAXUINT__(uint16_t)
50# endif
51
52# ifndef INT32_MAX
53#  define INT32_MIN __MININT__(int32_t)
54#  define INT32_MAX __MAXINT__(int32_t)
55#  define UINT32_MAX __MAXUINT__(uint32_t)
56# endif
57
58# ifndef INT64_MAX
59#  define INT64_MIN __MININT__(int64_t)
60#  define INT64_MAX __MAXINT__(int64_t)
61#  define UINT64_MAX __MAXUINT__(uint64_t)
62# endif
63
64# ifndef INT128_MAX
65#  if defined(__SIZEOF_INT128__) && __SIZEOF_INT128__ == 16
66typedef __int128_t int128_t;
67typedef __uint128_t uint128_t;
68#   define INT128_MIN __MININT__(int128_t)
69#   define INT128_MAX __MAXINT__(int128_t)
70#   define UINT128_MAX __MAXUINT__(uint128_t)
71#  endif
72# endif
73
74# ifndef SIZE_MAX
75#  define SIZE_MAX __MAXUINT__(size_t)
76# endif
77
78# ifndef OSSL_INTMAX_MAX
79#  define OSSL_INTMAX_MIN __MININT__(ossl_intmax_t)
80#  define OSSL_INTMAX_MAX __MAXINT__(ossl_intmax_t)
81#  define OSSL_UINTMAX_MAX __MAXUINT__(ossl_uintmax_t)
82# endif
83
84#endif
85
86