1 /* 2 * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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