StdLib/Include/limits.h

   1 /** @file
   2   The header <limits.h> defines several macros that expand to various limits and
   3   parameters of the standard integer types.
   4
   5   The values given below are constant expressions suitable for
   6   use in #if preprocessing directives. Except for CHAR_BIT and
   7   MB_LEN_MAX, they have the same
   8   type as would an expression that is an object of the corresponding type
   9   converted according to the integer promotions.
  10
  11   Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
  12   This program and the accompanying materials are licensed and made available under
  13   the terms and conditions of the BSD License that accompanies this distribution.
  14   The full text of the license may be found at
  15   http://opensource.org/licenses/bsd-license.
  16
  17   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  18   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  19 **/
  20 #ifndef _LIMITS_H
  21 #define _LIMITS_H
  22 #include  <sys/EfiCdefs.h>
  23 #include  <Library/PcdLib.h>
  24
  25 /* Get the architecturally defined limits for this compilation unit. */
  26 #include  <machine/limits.h>
  27
  28 /* Define the values required by the ISO/IEC 9899 Specification. */
  29
  30 /** Maximum number of bytes in a multibyte character, for any supported locale. **/
  31 #define MB_LEN_MAX  4               /* UTF-8 can require up to 4 bytes */
  32
  33 /** Number of bits comprising the smallest object that is not a bit-field (byte). **/
  34 #define CHAR_BIT    __CHAR_BIT
  35
  36 /** Minimum value for an object of type signed char. **/
  37 #define SCHAR_MIN   __SCHAR_MIN
  38
  39 /** Maximum value for an object of type signed char. **/
  40 #define SCHAR_MAX   __SCHAR_MAX
  41
  42 /** Maximum value for an object of type unsigned char. **/
  43 #define UCHAR_MAX   __UCHAR_MAX
  44
  45 #ifdef __CHAR_UNSIGNED__
  46   /** Maximum value for an object of type char. **/
  47   #define CHAR_MAX  UCHAR_MAX
  48   /** Minimum value for an object of type char. **/
  49   #define CHAR_MIN  0
  50 #else
  51   /** Maximum value for an object of type char. **/
  52   #define CHAR_MAX  SCHAR_MAX
  53   /** Minimum value for an object of type char. **/
  54   #define CHAR_MIN  SCHAR_MIN
  55 #endif
  56
  57 /** Minimum value for an object of type short int. **/
  58 #define SHRT_MIN    __SHRT_MIN
  59
  60 /** Maximum value for an object of type short int. **/
  61 #define SHRT_MAX    __SHRT_MAX
  62
  63 /** Maximum value for an object of type unsigned short int. **/
  64 #define USHRT_MAX   __USHRT_MAX
  65
  66 /** Minimum value for an object of type int. **/
  67 #define INT_MIN     __INT_MIN
  68
  69 /** Maximum value for an object of type int. **/
  70 #define INT_MAX     __INT_MAX
  71
  72 /** Maximum value for an object of type unsigned int. **/
  73 #define UINT_MAX    __UINT_MAX
  74
  75 /** Minimum value for an object of type long int. **/
  76 #define LONG_MIN    __LONG_MIN
  77
  78 /** Maximum value for an object of type long int. **/
  79 #define LONG_MAX    __LONG_MAX
  80
  81 /** Maximum value for an object of type unsigned long int. **/
  82 #define ULONG_MAX   __ULONG_MAX
  83
  84 /** Minimum value for an object of type long long int. **/
  85 #define LLONG_MIN   __LLONG_MIN
  86
  87 /** Maximum value for an object of type long long int. **/
  88 #define LLONG_MAX   __LLONG_MAX
  89
  90 /** Maximum value for an object of type unsigned long long int. **/
  91 #define ULLONG_MAX  __ULLONG_MAX
  92
  93 /* Object limits used in the Standard Libraries */
  94 #if (PcdGet32(PcdMaximumAsciiStringLength) > 0)
  95   /** Maximum length of an arbitrary "narrow-character" string. **/
  96   #define ASCII_STRING_MAX    PcdGet32(PcdMaximumAsciiStringLength)
  97 #else
  98   /** Maximum length of an arbitrary "narrow-character" string. **/
  99   #define ASCII_STRING_MAX    256
 100 #endif
 101
 102 #if (PcdGet32(PcdMaximumUnicodeStringLength) > 0)
 103   /** Maximum length of an arbitrary "wide-character" string. **/
 104   #define UNICODE_STRING_MAX    PcdGet32(PcdMaximumUnicodeStringLength)
 105 #else
 106   /** Maximum length of an arbitrary "wide-character" string. **/
 107   #define UNICODE_STRING_MAX    512
 108 #endif
 109
 110 /* Limits for BSD Compatibility */
 111 #define NL_TEXTMAX    2048
 112
 113 #include  <sys/syslimits.h>
 114
 115 #endif  /* _LIMITS_H */