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 66 typedef __int128_t int128_t; 67 typedef __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