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21dcbebc | 1 | /* |
a28d06f3 | 2 | * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved. |
167f6c93 | 3 | * |
48f4ad77 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
21dcbebc RS |
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 | |
167f6c93 RL |
8 | */ |
9 | ||
ae4186b0 DMSP |
10 | #ifndef OSSL_INTERNAL_NUMBERS_H |
11 | # define OSSL_INTERNAL_NUMBERS_H | |
3a111aad | 12 | # pragma once |
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13 | |
14 | # include <limits.h> | |
15 | ||
dd6b2706 | 16 | # if (-1 & 3) == 0x03 /* Two's complement */ |
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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 | ||
dd6b2706 | 22 | # elif (-1 & 3) == 0x02 /* One's complement */ |
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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 | ||
dd6b2706 | 28 | # elif (-1 & 3) == 0x01 /* Sign/magnitude */ |
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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 | ||
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64 | # ifndef SIZE_MAX |
65 | # define SIZE_MAX __MAXUINT__(size_t) | |
66 | # endif | |
67 | ||
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68 | #endif |
69 |