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      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