StdLib/Include/x86/limits.h

   1 /** @file
   2   Intel x86 architecture (both Ia32 and X64) specific values for <limits.h>.
   3
   4   Within this file, the ^ character is used in comments to represent exponentiation.
   5   Thus, 2^7 means "2 to the 7th power", NOT "2 XOR 7".
   6
   7   Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
   8   This program and the accompanying materials are licensed and made available under
   9   the terms and conditions of the BSD License that accompanies this distribution.
  10   The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 **/
  16 #ifndef _MACHINE_LIMITS_H
  17 #define _MACHINE_LIMITS_H
  18
  19 /** Number of bits for smallest object that is not a bit-field (byte). **/
  20 #define __CHAR_BIT    8
  21
  22 /** Minimum value for an object of type signed char. **/
  23 #define __SCHAR_MIN   -128 // -(2^7 - 1)
  24
  25 /** Maximum value for an object of type signed char. **/
  26 #define __SCHAR_MAX   +127 // 2^7 - 1
  27
  28 /** Maximum value for an object of type unsigned char. **/
  29 #define __UCHAR_MAX   255  // 2^8 - 1
  30
  31 /** Minimum value for an object of type short int. **/
  32 #define __SHRT_MIN    -32768 // -(2^15 - 1)
  33
  34 /** Maximum value for an object of type short int. **/
  35 #define __SHRT_MAX    +32767 // 2^15 - 1
  36
  37 /** Maximum value for an object of type unsigned short int. **/
  38 #define __USHRT_MAX   65535 // 2^16 - 1
  39
  40 /** Maximum value for an object of type int. **/
  41 #define __INT_MAX     +2147483647 // 2^31 - 1
  42
  43 /** Minimum value for an object of type int. **/
  44 #define __INT_MIN     (-2147483647 - 1) // -(2^31 - 1)
  45
  46 /** Maximum value for an object of type unsigned int. **/
  47 #define __UINT_MAX    0xffffffff // 2^32 - 1
  48
  49 /** Minimum value for an object of type long long int. **/
  50 #define __LLONG_MIN   (-9223372036854775807LL - 1LL)  // -(2^63 - 1)
  51
  52 /** Maximum value for an object of type long long int. **/
  53 #define __LLONG_MAX   9223372036854775807LL // 2^63 - 1
  54
  55 /** Maximum value for an object of type unsigned long long int. **/
  56 #define __ULLONG_MAX  0xFFFFFFFFFFFFFFFFULL // 2^64 - 1
  57
  58 /** Intel extensions to <limits.h> for UEFI
  59 @{
  60 **/
  61 #define __SHORT_BIT     16    ///< Number of bits comprising a short int.
  62 #define __WCHAR_BIT     16    ///< Number of bits comprising a wide character.
  63 #define __INT_BIT       32    ///< Number of bits comprising an int.
  64 #define __LONG_LONG_BIT 64    ///< Number of bits comprising a long long int.
  65 /// @}
  66
  67 #endif    /* _MACHINE_LIMITS_H */