1 | /* |
2 | * Copyright 2015-2016 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 | |
13 | # include <limits.h> |
14 | |
15 | # if (-1 & 3) == 0x03 /* Two's complement */ |
16 | |
17 | # define __MAXUINT__(T) ((T) -1) |
18 | # define __MAXINT__(T) ((T) ((((T) 1) << ((sizeof(T) * CHAR_BIT) - 1)) ^ __MAXUINT__(T))) |
19 | # define __MININT__(T) (-__MAXINT__(T) - 1) |
20 | |
21 | # elif (-1 & 3) == 0x02 /* One's complement */ |
22 | |
23 | # define __MAXUINT__(T) (((T) -1) + 1) |
24 | # define __MAXINT__(T) ((T) ((((T) 1) << ((sizeof(T) * CHAR_BIT) - 1)) ^ __MAXUINT__(T))) |
25 | # define __MININT__(T) (-__MAXINT__(T)) |
26 | |
27 | # elif (-1 & 3) == 0x01 /* Sign/magnitude */ |
28 | |
29 | # define __MAXINT__(T) ((T) (((((T) 1) << ((sizeof(T) * CHAR_BIT) - 2)) - 1) | (((T) 1) << ((sizeof(T) * CHAR_BIT) - 2)))) |
30 | # define __MAXUINT__(T) ((T) (__MAXINT__(T) | (((T) 1) << ((sizeof(T) * CHAR_BIT) - 1)))) |
31 | # define __MININT__(T) (-__MAXINT__(T)) |
32 | |
33 | # else |
34 | |
35 | # error "do not know the integer encoding on this architecture" |
36 | |
37 | # endif |
38 | |
39 | # ifndef INT8_MAX |
40 | # define INT8_MIN __MININT__(int8_t) |
41 | # define INT8_MAX __MAXINT__(int8_t) |
42 | # define UINT8_MAX __MAXUINT__(uint8_t) |
43 | # endif |
44 | |
45 | # ifndef INT16_MAX |
46 | # define INT16_MIN __MININT__(int16_t) |
47 | # define INT16_MAX __MAXINT__(int16_t) |
48 | # define UINT16_MAX __MAXUINT__(uint16_t) |
49 | # endif |
50 | |
51 | # ifndef INT32_MAX |
52 | # define INT32_MIN __MININT__(int32_t) |
53 | # define INT32_MAX __MAXINT__(int32_t) |
54 | # define UINT32_MAX __MAXUINT__(uint32_t) |
55 | # endif |
56 | |
57 | # ifndef INT64_MAX |
58 | # define INT64_MIN __MININT__(int64_t) |
59 | # define INT64_MAX __MAXINT__(int64_t) |
60 | # define UINT64_MAX __MAXUINT__(uint64_t) |
61 | # endif |
62 | |
63 | # ifndef SIZE_MAX |
64 | # define SIZE_MAX __MAXUINT__(size_t) |
65 | # endif |
66 | |
67 | #endif |
68 | |
69 | |